Count-doubling time safety circuit
Rusch, Gordon K. (Downers Grove, IL); Keefe, Donald J. (Lemont, IL); McDowell, William P. (Downers Grove, IL)
1981-01-01T23:59:59.000Z
There is provided a nuclear reactor count-factor-increase time monitoring circuit which includes a pulse-type neutron detector, and means for counting the number of detected pulses during specific time periods. Counts are compared and the comparison is utilized to develop a reactor scram signal, if necessary.
Hammes-Schiffer, Sharon
Nonadiabatic dynamics for processes involving multiple avoided curve crossings: Double proton transfer and proton-coupled electron transfer reactions Jian-Yun Fang and Sharon Hammes June 1997; accepted 26 August 1997 The extension of the surface hopping method ``molecular dynamics
Alternating, Pattern-Avoiding Permutations
Lewis, Joel Brewster
We study the problem of counting alternating permutations avoiding collections of permutation patterns including 132. We construct a bijection between the set S[subscript n](132) of 132-avoiding permutations and the set ...
G. Bellini; B. Caccianiga; M. Chen; F. A. Danevich; M. G. Giammarchi; V. V. Kobychev; B. N. Kropivyansky; E. Meroni; L. Miramonti; A. S. Nikolayko; L. Oberauer; O. A. Ponkratenko; V. I. Tretyak; S. Yu. Zdesenko; Yu. G. Zdesenko
2000-07-11T23:59:59.000Z
The unique features (super-low background and large sensitive volume) of the CTF and BOREXINO set ups are used in the CAMEO project for a high sensitivity study of 100-Mo and 116-Cd neutrinoless double beta decay. Pilot measurements with 116-Cd and Monte Carlo simulations show that the sensitivity of the CAMEO experiment (in terms of the half-life limit for neutrinoless double beta decay) is (3-5) 10^24 yr with a 1 kg source of 100-Mo (116-Cd, 82-Se, and 150-Nd) and about 10^26 yr with 65 kg of enriched 116-CdWO_4 crystals placed in the liquid scintillator of the CTF. The last value corresponds to a limit on the neutrino mass of less than 0.06 eV. Similarly with 1000 kg of 116-CdWO_4 crystals located in the BOREXINO apparatus the neutrino mass limit can be pushed down to m_nu<0.02 eV.
Chilek, Kevin
2007-01-31T23:59:59.000Z
This certificate accompanies the Quality Counts program. 1 page. It comes in packages of 25 certificates....
Low Background Counting At SNOLAB
Lawson, Ian; Cleveland, Bruce [SNOLAB, 1039 Regional Rd 24, Lively, ON P3Y 1N2 (Canada)
2011-04-27T23:59:59.000Z
It is a continuous and ongoing effort to maintain radioactivity in materials and in the environment surrounding most underground experiments at very low levels. These low levels are required so that experiments can achieve the required detection sensitivities for the detection of low-energy neutrinos, searches for dark matter and neutrinoless double-beta decay. SNOLAB has several facilities which are used to determine these low background levels in the materials and the underground environment. This proceedings will describe the SNOLAB High Purity Germanium Detector which has been in continuous use for the past five years and give results of many of the items that have been counted over that period. Brief descriptions of SNOLAB's alpha-beta and electrostatic counters will be given, and the radon levels at SNOLAB will be discussed.
Fast counting electronics for neutron coincidence counting
Swansen, James E. (Los Alamos, NM)
1987-01-01T23:59:59.000Z
An amplifier-discriminator is tailored to output a very short pulse upon an above-threshold input from a detector which may be a .sup.3 He detector. The short pulse output is stretched and energizes a light emitting diode (LED) to provide a visual output of operation and pulse detection. The short pulse is further fed to a digital section for processing and possible ORing with other like generated pulses. Finally, the output (or ORed output ) is fed to a derandomizing buffer which converts the rapidly and randomly occurring pulses into synchronized and periodically spaced-apart pulses for the accurate counting thereof. Provision is also made for the internal and external disabling of each individual channel of amplifier-discriminators in an ORed plurality of same.
Fast counting electronics for neutron coincidence counting
Swansen, J.E.
1985-03-05T23:59:59.000Z
An amplifier-discriminator is tailored to output a very short pulse upon an above-threshold input from a detector which may be a /sup 3/He detector. The short pulse output is stretched and energizes a light emitting diode (LED) to provide a visual output of operation and pulse detection. The short pulse is further fed to a digital section for processing and possible ORing with other like generated pulses. Finally, the output (or ORed output) is fed to a derandomizing buffer which converts the rapidly and randomly occurring pulses into synchronized and periodically spaced-apart pulses for the accurate counting thereof. Provision is also made for the internal and external disabling of each individual channel of amplifier-discriminators in an ORed plurality of same.
Chilek, Kevin; Gregory, Elizabeth
2004-01-27T23:59:59.000Z
This exhibitor card identifies young livestock exhibitors as participants in the Quality Counts! program. The card is printed with a leather-style background on heavy card stock. It features the 4-H clover and the FFA logo, as well as the logo...
Avoiding Predation Two Ways to Avoid Getting Eaten
Brown, Christopher A.
boatmen avoid areas with cannibalistic adults Forage in lower quality parts of pond #12;2 Predator tail-flagging and stotting Clockwise from left: monarch caterpillar; yellowjackets; giant mesquite bugs
Multianode cylindrical proportional counter for high count rates
Hanson, J.A.; Kopp, M.K.
1980-05-23T23:59:59.000Z
A cylindrical, multiple-anode proportional counter is provided for counting of low-energy photons (< 60 keV) at count rates of greater than 10/sup 5/ counts/sec. A gas-filled proportional counter cylinder forming an outer cathode is provided with a central coaxially disposed inner cathode and a plurality of anode wires disposed in a cylindrical array in coaxial alignment with and between the inner and outer cathodes to form a virtual cylindrical anode coaxial with the inner and outer cathodes. The virtual cylindrical anode configuration improves the electron drift velocity by providing a more uniform field strength throughout the counter gas volume, thus decreasing the electron collection time following the detection of an ionizing event. This avoids pulse pile-up and coincidence losses at these high count rates. Conventional RC position encoding detection circuitry may be employed to extract the spatial information from the counter anodes.
Multianode cylindrical proportional counter for high count rates
Hanson, James A. (Madison, WI); Kopp, Manfred K. (Oak Ridge, TN)
1981-01-01T23:59:59.000Z
A cylindrical, multiple-anode proportional counter is provided for counting of low-energy photons (<60 keV) at count rates of greater than 10.sup.5 counts/sec. A gas-filled proportional counter cylinder forming an outer cathode is provided with a central coaxially disposed inner cathode and a plurality of anode wires disposed in a cylindrical array in coaxial alignment with and between the inner and outer cathodes to form a virtual cylindrical anode coaxial with the inner and outer cathodes. The virtual cylindrical anode configuration improves the electron drift velocity by providing a more uniform field strength throughout the counter gas volume, thus decreasing the electron collection time following the detection of an ionizing event. This avoids pulse pile-up and coincidence losses at these high count rates. Conventional RC position encoding detection circuitry may be employed to extract the spatial information from the counter anodes.
Avoiding character collisions in games
Calderon, Manuel
1999-01-01T23:59:59.000Z
that solves this problem for situations with at least thirty characters. A program was written to test and demonstrate the method. This method might also contribute to the solution of collision avoidance problems in robotics....
The background in the neutrinoless double beta decay experiment GERDA
Agostini, M; Andreotti, E; Bakalyarov, A M; Balata, M; Barabanov, I; Heider, M Barnabe; Barros, N; Baudis, L; Bauer, C; Becerici-Schmidt, N; Bellotti, E; Belogurov, S; Belyaev, S T; Benato, G; Bettini, A; Bezrukov, L; Bode, T; Brudanin, V; Brugnera, R; Budjas, D; Caldwell, A; Cattadori, C; Chernogorov, A; Cossavella, F; Demidova, E V; Domula, A; Egorov, V; Falkenstein, R; Ferella, A; Freund, K; Frodyma, N; Gangapshev, A; Garfagnini, A; Gotti, C; Grabmayr, P; Gurentsov, V; Gusev, K; Guthikonda, K K; Hampel, W; Hegai, A; Heisel, M; Hemmer, S; Heusser, G; Hofmann, W; Hult, M; Inzhechik, L V; Ioannucci, L; Csathy, J Janicsko; Jochum, J; Junker, M; Kihm, T; Kirpichnikov, I V; Kirsch, A; Klimenko, A; Knoepfle, K T; Kochetov, O; Kornoukhov, V N; Kuzminov, V V; Laubenstein, M; Lazzaro, A; Lebedev, V I; Lehnert, B; Liao, H Y; Lindner, M; Lippi, I; Liu, X; Lubashevskiy, A; Lubsandorzhiev, B; Lutter, G; Macolino, C; Machado, A A; Majorovits, B; Maneschg, W; Nemchenok, I; Nisi, S; O'Shaughnessy, C; Palioselitis, D; Pandola, L; Pelczar, K; Pessina, G; Pullia, A; Riboldi, S; Sada, C; Salathe, M; Schmitt, C; Schreiner, J; Schulz, O; Schwingenheuer, B; Schoenert, S; Shevchik, E; Shirchenko, M; Simgen, H; Smolnikov, A; Stanco, L; Strecker, H; Tarka, M; Ur, C A; Vasenko, A A; Volynets, O; von Sturm, K; Wagner, V; Walter, M; Wegmann, A; Wester, T; Wojcik, M; Yanovich, E; Zavarise, P; Zhitnikov, I; Zhukov, S V; Zinatulina, D; Zuber, K; Zuzel, G
2014-01-01T23:59:59.000Z
The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta decay of 76Ge. The signature of the signal is a monoenergetic peak at 2039 keV, the Q-value of the decay, Q_bb. To avoid bias in the signal search, the present analysis does not consider all those events, that fall in a 40 keV wide region centered around Q_bb. The main parameters needed for the neutrinoless double beta decay analysis are described. A background model was developed to describe the observed energy spectrum. The model contains several contributions, that are expected on the basis of material screening or that are established by the observation of characteristic structures in the energy spectrum. The model predicts a flat energy spectrum for the blinding window around Q_bb with a background index ranging from 17.6 to 23.8*10^{-3} counts/(keV kg yr). A part of the data not considered before has been used to test if the predictions of the background model...
Elizabeth Camilleri; Peter P. Rohde; Jason Twamley
2014-01-09T23:59:59.000Z
Quantum walks exhibit many unique characteristics compared to classical random walks. In the classical setting, self-avoiding random walks have been studied as a variation on the usual classical random walk. Classical self-avoiding random walks have found numerous applications, most notably in the modeling of protein folding. We consider the analogous problem in the quantum setting. We complement a quantum walk with a memory register that records where the walker has previously resided. The walker is then able to avoid returning back to previously visited sites. We parameterise the strength of the memory recording and the strength of the memory back-action on the walker's motion, and investigate their effect on the dynamics of the walk. We find that by manipulating these parameters the walk can be made to reproduce ideal quantum or classical random walk statistics, or a plethora of more elaborate diffusive phenomena. In some parameter regimes we observe a close correspondence between classical self-avoiding random walks and the quantum self-avoiding walk.
Communication-avoiding Krylov subspace methods
Hoemmen, Mark
2010-01-01T23:59:59.000Z
3.1.3 Avoiding communication in Arnoldi . . . . .CONTENTS iii 3 Communication-avoiding Arnoldi and GMRES 3.1CA-Lanczos . . 5 Communication-avoiding CG 5.1 Conjugate
Kunkle, Tom
Study Traps Avoid to Succeed Study traps are all around you! If you have found yourself saying any. Interrupt study time with planned breaks. Begin studying early, but increase study time as exams approach. "I've got so much to study... and so little time." Preview and skim your reading! Read chapter
Power counting renormalizability of scalar theory in Lifshitz spacetime
Takayuki Hirayama
2012-10-25T23:59:59.000Z
We analyse the power counting renormalizability of scalar theory in Lifshitz spacetime in D+2 dimensions. We show the spectral dimension becomes 2+(D/z) (z is the critical exponent) after integrating out the radion field. We comment on the AdS/CFT correspondence, and on how to avoid the Lifshitz singularity by flowing into AdS spacetime in the infrared. We also comment on the quantum gravity in Lifshitz spacetime.
Low background counting techniques at SNOLAB
Lawson, Ian; Cleveland, Bruce [SNOLAB, 1039 Regional Rd 24, Lively, ON P3Y 1N2 (Canada)] [SNOLAB, 1039 Regional Rd 24, Lively, ON P3Y 1N2 (Canada)
2013-08-08T23:59:59.000Z
Many of the experiments currently searching for dark matter, studying properties of neutrinos or searching for neutrinoless double beta decay require very low levels of radioactive backgrounds both in their own construction materials and in the surrounding environment. These low background levels are required so that the experiments can achieve the required sensitivities for their searches. SNOLAB has several facilities which are used to directly measure these radioactive backgrounds. This proceedings will describe SNOLAB's High Purity Germanium Detectors, one of which has been in continuous use for the past seven years measuring materials for many experiments in operation or under construction at SNOLAB. A description of the characterisation of SNOLAB's new germanium well detector will be presented. In addition, brief descriptions of SNOLAB's alpha-beta and electrostatic counters will be presented and a description of SNOLAB's future low background counting laboratory will be given.
The COBRA Double Beta Decay Experiment
Dawson, J. V. [Department of Physics and Astronomy, University of Sussex, Brighton. BN1 9QH (United Kingdom)
2007-03-28T23:59:59.000Z
The progress of the COBRA neutrinoless double beta decay experiment is discussed. Potential backgrounds are described. Estimates on the contamination levels of 214Bi in the detectors have been made using previously acquired low background data. New crystals with a different passivation material show an improved background count rate of approximately one order of magnitude.
Obstacle-avoiding navigation system
Borenstein, Johann (Ann Arbor, MI); Koren, Yoram (Ann Arbor, MI); Levine, Simon P. (Ann Arbor, MI)
1991-01-01T23:59:59.000Z
A system for guiding an autonomous or semi-autonomous vehicle through a field of operation having obstacles thereon to be avoided employs a memory for containing data which defines an array of grid cells which correspond to respective subfields in the field of operation of the vehicle. Each grid cell in the memory contains a value which is indicative of the likelihood, or probability, that an obstacle is present in the respectively associated subfield. The values in the grid cells are incremented individually in response to each scan of the subfields, and precomputation and use of a look-up table avoids complex trigonometric functions. A further array of grid cells is fixed with respect to the vehicle form a conceptual active window which overlies the incremented grid cells. Thus, when the cells in the active window overly grid cell having values which are indicative of the presence of obstacles, the value therein is used as a multiplier of the precomputed vectorial values. The resulting plurality of vectorial values are summed vectorially in one embodiment of the invention to produce a virtual composite repulsive vector which is then summed vectorially with a target-directed vector for producing a resultant vector for guiding the vehicle. In an alternative embodiment, a plurality of vectors surrounding the vehicle are computed, each having a value corresponding to obstacle density. In such an embodiment, target location information is used to select between alternative directions of travel having low associated obstacle densities.
Counting Out Loud Counting Objects Give-A-Number Identification
Stanford, Kyle
Characteristics Low-Income Group n = 75 Higher-Income Group n = 45 Mean age at first session (yrs; mos) 4;8 4 ResultsMethod "One, two, three, four, five, six, seven, eight, nine, ten." Counting Objects Give indicate better performance. Legend Low-Income Group Higher-Income Group Scaffolded Number Line * p
Power-counting and Renormalizability in Lifshitz Scalar Theory
Toshiaki Fujimori; Takeo Inami; Keisuke Izumi; Tomotaka Kitamura
2015-02-06T23:59:59.000Z
We study the renormalizability in theories of a self-interacting Lifshitz scalar field. We show that although the statement of power-counting is true at one-loop order, in generic cases where the scalar field is dimensionless, an infinite number of counter terms are involved in the renormalization procedure. This problem can be avoided by imposing symmetries, the shift symmetry in the present paper, which allow only a finite number of counter terms to appear. The symmetry requirements might have important implications for the construction of matter field sectors in the Horava-Lifshitz gravity.
Power-counting and Renormalizability in Lifshitz Scalar Theory
Fujimori, Toshiaki; Izumi, Keisuke; Kitamura, Tomotaka
2015-01-01T23:59:59.000Z
We study the renormalizability in theories of a self-interacting Lifshitz scalar field. We show that although the statement of power-counting is true at one-loop order, in generic cases where the scalar field is dimensionless, an infinite number of counter terms are involved in the renormalization procedure. This problem can be avoided by imposing symmetries, the shift symmetry in the present paper, which allow only a finite number of counter terms to appear. The symmetry requirements might have important implications for the construction of matter field sectors in the Horava-Lifshitz gravity.
Avoidance behavior in a fixed-ratio three free-operant avoidance situation
King, Thomas Michael
1971-01-01T23:59:59.000Z
discrimination. The results did not lend support to the Conditioned Aversive Temporal Stimuli theory of reinforcement in free-operant avoidance proposed by Anger (1963). The notion that a response-contingent stimulus, in a free-operant avoidance situation... 37 38 40 42 CHAPTER I INTRODUCTION In discriminative avoidance procedures, a warning signal increases the probability of a response which allows the sub]ect to avoid a noxious stimulus (Kimble, 1961). Reinforcement of this avoidance behavior...
Sandia National Laboratories: avoid altering fish behavior
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
avoid altering fish behavior Current Energy Converter Array Optimization Framework On March 13, 2014, in Computational Modeling & Simulation, Energy, News, News & Events,...
Sustainability Double Degree Double Degree Info
Grünwald, Niklaus J.
Sustainability Double Degree Double Degree Info: · 36 credits in B for graduation. Sustainability Core: Take each course below for a total of 17 -20 credits. Term/Grade Course _____ ____ *NR 350 (4) Sustainable
Multivariate Counting Processes By Mathias Zocher
Schmidt, Klaus D.
Multivariate Counting Processes By Mathias Zocher Fachrichtung Mathematik Technische Universit the recent development of the transition from univariate models to multivariate models, this paper considers multivariate counting processes. Multivariate versions of the Poisson process and the mixed Poisson process
Kieffer, Nat M.; Cartwright, T.C.
1980-01-01T23:59:59.000Z
,;J Cover photo: This lO-month-old bull is the product of a two-breed cross. He shows classic symptoms of double muscling and illustrates that the double-muscled gene is the same in different breeds of cattlr Double Muscling ......... In Cattle... Nat M. Kieffer Professor T. C. Cartwright Professor The Texas Agricultural Experiment Station (Department of Animal Science) 2 Contents 2 Summary 3 Introduction 3 Historical Background 4 Physical Characteristics of Double-Muscled Cattle 4...
Kato, Akio
2006-11-14T23:59:59.000Z
The invention provides methods for chromosome doubling in plants. The technique overcomes the low yields of doubled progeny associated with the use of prior techniques for doubling chromosomes in plants such as grasses. The technique can be used in large scale applications and has been demonstrated to be highly effective in maize. Following treatment in accordance with the invention, plants remain amenable to self fertilization, thereby allowing the efficient isolation of doubled progeny plants.
Low Background Counting at LBNL
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Smith, A. R.; Thomas, K. J.; Norman, E. B.; Chan, Y. D.; Lesko, K. T.; Hurley, D. L.
2015-03-24T23:59:59.000Z
The Low Background Facility (LBF) at Lawrence Berkeley National Laboratory in Berkeley, California provides low background gamma spectroscopy services to a wide array of experiments and projects. The analysis of samples takes place within two unique facilities; locally within a carefully-constructed, low background cave and remotely at an underground location that historically has operated underground in Oroville, CA, but has recently been relocated to the Sanford Underground Research Facility (SURF) in Lead, SD. These facilities provide a variety of gamma spectroscopy services to low background experiments primarily in the form of passive material screening for primordial radioisotopes (U, Th, K)more »or common cosmogenic/anthropogenic products, as well as active screening via Neutron Activation Analysis for specific applications. The LBF also provides hosting services for general R&D testing in low background environments on the surface or underground for background testing of detector systems or similar prototyping. A general overview of the facilities, services, and sensitivities is presented. Recent activities and upgrades will also be presented, such as the completion of a 3? anticoincidence shield at the surface station and environmental monitoring of Fukushima fallout. The LBF is open to any users for counting services or collaboration on a wide variety of experiments and projects.« less
Avoiding a Train Wreck: Replacing Old Coal Plants with Energy...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Avoiding a Train Wreck: Replacing Old Coal Plants with Energy Efficiency, August 2011 Avoiding a Train Wreck: Replacing Old Coal Plants with Energy Efficiency, August 2011 This...
A Count of Classical Field Theory Graphs
Gordon Chalmers
2005-07-28T23:59:59.000Z
A generating function is derived that counts the number of diagrams in an arbitrary scalar field theory. The number of graphs containing any number $n_j$ of $j$-point vertices is given. The count is also used to obtain the number of classical graphs in gauge theory and gravity.
People taking part in this CAR count are counting all the large terrestrial birds, such
de Villiers, Marienne
People taking part in this CAR count are counting all the large terrestrial birds, such as cranes species are monitored by CAR, of which 14 appear in the South African Red Data Book as Critically Endan gered, Vulnerable or NearThreatened. CAR counts began in 1993 and take place on the last Saturday
Low cost crowd counting using audio tones
Kannan, Pravein Govindan
With mobile devices becoming ubiquitous, collaborative applications have become increasingly pervasive. In these applications, there is a strong need to obtain a count of the number of mobile devices present in an area, ...
Calorie Counting Made Easy | GE Global Research
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
selling factor I would love to be a tester Gina 2014.07.30 My daughter has type 1 diabetes & I would love one that counted carbs. Helen k 2014.07.30 I would absolutely buy this...
Power Counting to Better Jet Observables
Andrew J. Larkoski; Ian Moult; Duff Neill
2014-09-22T23:59:59.000Z
Optimized jet substructure observables for identifying boosted topologies will play an essential role in maximizing the physics reach of the Large Hadron Collider. Ideally, the design of discriminating variables would be informed by analytic calculations in perturbative QCD. Unfortunately, explicit calculations are often not feasible due to the complexity of the observables used for discrimination, and so many validation studies rely heavily, and solely, on Monte Carlo. In this paper we show how methods based on the parametric power counting of the dynamics of QCD, familiar from effective theory analyses, can be used to design, understand, and make robust predictions for the behavior of jet substructure variables. As a concrete example, we apply power counting for discriminating boosted Z bosons from massive QCD jets using observables formed from the n-point energy correlation functions. We show that power counting alone gives a definite prediction for the observable that optimally separates the background-rich from the signal-rich regions of phase space. Power counting can also be used to understand effects of phase space cuts and the effect of contamination from pile-up, which we discuss. As these arguments rely only on the parametric scaling of QCD, the predictions from power counting must be reproduced by any Monte Carlo, which we verify using Pythia8 and Herwig++. We also use the example of quark versus gluon discrimination to demonstrate the limits of the power counting technique.
Avoid Nuisance Tripping with Premium Efficiency Motors
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankShale_Gas.pdfService on the TargetFY12 DOECommentsLLCOperated by theDesignAutotuneAvoid Nuisance Tripping
Pattern avoidance for alternating permutations and reading words of tableaux
Lewis, Joel Brewster
2012-01-01T23:59:59.000Z
We consider a variety of questions related to pattern avoidance in alternating permutations and generalizations thereof. We give bijective enumerations of alternating permutations avoiding patterns of length 3 and 4, of ...
On Count/Mass Distinction in Slovene
Mitrovi?, Moreno
2011-01-01T23:59:59.000Z
there is rabbit in this stew ? there is rabbit meat in this stew #10 A (predominately) mass noun can be made count we store three bloods ? we store three blood types Section 3 overviews these properties with regards to their application to Slovene. We... we store three bloods ? we store three blood types I regard and convert Chiercia’s ten properties for count/mass distinction into tests: I apply test #1 in §3.2.1, test #2 in §3.2.2, tests #4-7 in §3.2.3, test #8 in §3.2.4, and tests #9 and #10...
Avoidable Sets in The Bicyclic Inverse Semigroup Nandor Sieben
Sieben, Nándor
Avoidable Sets in The Bicyclic Inverse Semigroup N´andor Sieben 9/2/2003 Abstract A subset U elements of B. The avoidable sets of the bicyclic inverse semigroup are classified. 1. Introduction If (S avoidable sets in the bicyclic inverse semigroup, which is perhaps the most important inverse semigroup. Its
Communication Avoiding and Overlapping for Numerical Linear Algebra
Touriño, Juan
Communication Avoiding and Overlapping for Numerical Linear Algebra Evangelos Georganas1, Jorge exascale systems, communication cost must be avoided or overlapped. Communication-avoiding 2.5D algorithms. Communication overlap attempts to hide messaging latency by pipelining messages and overlapping
Helping Users Avoid Bugs in GUI Applications Amir Michail
New South Wales, University of
by users. Anyone who has encountered a bug will likely try to avoid it in the future. But such a manual ap, the manual approach to bug avoidance requires the user to figure out the circumstances under which a bugHelping Users Avoid Bugs in GUI Applications Amir Michail University of New South Wales Sydney, NSW
Helping Users Avoid Bugs in GUI Applications Amir Michail
Xie, Tao
. The idea of avoiding bugs is not new: it is already done manually by users. Anyone who has encountered, the manual approach to bug avoidance does not make it easy for users to learn from other users. For exam- pleHelping Users Avoid Bugs in GUI Applications Amir Michail School of Computer Science
Neutrinoless double beta decay
K. Zuber
2012-01-23T23:59:59.000Z
The physics potential of neutrinoless double beta decay is discussed. Furthermore, experimental considerations are presented as well as the current status of experiments. Finally an outlook towards the future, work on nuclear matrix elements and alternative processes is given.
Hull, Chris
The zero modes of closed strings on a torus — the torus coordinates plus dual coordinates conjugate to winding number — parameterize a doubled torus. In closed string field theory, the string field depends on all zero-modes ...
Steven R. Elliott; Petr Vogel
2002-02-27T23:59:59.000Z
The motivation, present status, and future plans of the search for the neutrinoless double beta decay are reviewed. It is argued that, motivated by the recent observations of neutrino oscillations, there is a reasonable hope that neutrinoless double beta decay corresponding to the neutrino mass scale suggested by oscillations, of about 50 meV, actually exists. The challenges to achieve the sensitivity corresponding to this mass scale, and plans to overcome them, are described.
Differential white cell count by centrifugal microfluidics.
Sommer, Gregory Jon; Tentori, Augusto M.; Schaff, Ulrich Y.
2010-07-01T23:59:59.000Z
We present a method for counting white blood cells that is uniquely compatible with centrifugation based microfluidics. Blood is deposited on top of one or more layers of density media within a microfluidic disk. Spinning the disk causes the cell populations within whole blood to settle through the media, reaching an equilibrium based on the density of each cell type. Separation and fluorescence measurement of cell types stained with a DNA dye is demonstrated using this technique. The integrated signal from bands of fluorescent microspheres is shown to be proportional to their initial concentration in suspension. Among the current generation of medical diagnostics are devices based on the principle of centrifuging a CD sized disk functionalized with microfluidics. These portable 'lab on a disk' devices are capable of conducting multiple assays directly from a blood sample, embodied by platforms developed by Gyros, Samsung, and Abaxis. [1,2] However, no centrifugal platform to date includes a differential white blood cell count, which is an important metric complimentary to diagnostic assays. Measuring the differential white blood cell count (the relative fraction of granulocytes, lymphocytes, and monocytes) is a standard medical diagnostic technique useful for identifying sepsis, leukemia, AIDS, radiation exposure, and a host of other conditions that affect the immune system. Several methods exist for measuring the relative white blood cell count including flow cytometry, electrical impedance, and visual identification from a stained drop of blood under a microscope. However, none of these methods is easily incorporated into a centrifugal microfluidic diagnostic platform.
Towards Robust Peer Counting Alberto Montresor
Montresor, Alberto
peer count in absence of churn. The protocol can handle extreme levels of churn, and automatically churn resilience [2]. Others let each node assume f(n) identities to balance load [3], [4. First, it is eventually accurate, i.e. the estimate converges to the number of nodes in absence of churn
Gas Filled Detectors counting & tracking of
Peletier, Reynier
Gas Filled Detectors counting & tracking of particles energy loss generation of electron-ion+ pairs #12;Gas Filled Detectors Primary and Total Ionization fast charged particles ionize the atoms of a gas fraction of resulting primary electrons have enough kinetic energy to ionize other atoms #12;Gas Filled
Fast Probabilistic Planning Through Weighted Model Counting
Domshlak, Carmel
Fast Probabilistic Planning Through Weighted Model Counting Carmel Domshlak J¨org Hoffmann Technion Fast Probabilistic Planning Through Weighted Model Countin #12;Talk Outline Probabilistic Planning Conclusion Carmel Domshlak, J¨org Hoffmann Fast Probabilistic Planning Through Weighted Model Countin #12
Observable Majoron Emission in Neutrinoless Double Beta Decay
Z Berezhiani; A Yu Smirnov; J W F Valle
1992-07-03T23:59:59.000Z
We consider a class of simplest Majoron models where neutrino- majoron couplings can be in the range $g \\sim 10^{-5}-10^{-3}$ leading to the observability of neutrinoless double beta decay with majoron emission. The majoron is a singlet of the electroweak gauge symmetry, thus avoiding conflict with the LEP data on Z decay, which rules out the triplet and doublet majoron models.
Particle Energy Spectrum, Revisited from a Counting Statistics Perspective
None
2012-07-28T23:59:59.000Z
In nuclear science, gamma and neutron spectra are counted energy by energy, and then particle by particle. Until recently, few studies have been performed on how exactly those energy spectra are counted, or how those counts are correlated. Because of lack of investigation, cross section covariance and correlation matrices are usually estimated using perturbation method. We will discuss a statistical counting scheme that shall mimic the gamma and neutron counting process used in nuclear science. From this counting scheme, the cross section covariance and correlation can be statistically derived.
AVOID BECOMING A VICTIM OF COUNTERFEIT ITEMS
WARRINER RD
2011-07-13T23:59:59.000Z
In today's globalized economy, we cannot live without imported products. Most people do not realize how thin the safety net of regulation and inspection really is. Less than three percent of imported products receive any form of government inspection prior to sale. Avoid flea markets, street vendors and deep discount stores. The sellers of counterfeit wares know where to market their products. They look for individuals who are hungry for a brand name item but do not want to pay a brand name price for it. The internet provides anonymity to the sellers of counterfeit products. Unlike Europe, U.S. law does not hold internet-marketing organizations, responsible for the quality of the products sold on their websites. These organizations will remove an individual vendor when a sufficient number of complaints are lodged, but they will not take responsibility for the counterfeit products you may have purchased. EBay has a number of counterfeit product guides to help you avoid being a victim of the sellers of these products. Ten percent of all medications taken worldwide are counterfeit. If you do buy medications on-line, be sure that the National Association of Boards of Pharmacy Verified Internet Pharmacy Practice Sites (VIPPS) recommends the pharmacy you choose to use. Inspect all medication purchases and report any change in color, shape, imprinting or odor to your pharmacist. If you take generic medications these attributes may change from one manufacturer to another. Your pharmacist should inform you of any changes when you refill your prescription. If they do not, get clarification prior to taking the medication. Please note that the Federal Drug Administration (FDA) does not regulate supplements. The FDA only steps in when a specific supplement proves to cause physical harm or contains a regulated ingredient. Due to counterfeiting, Underwriters Laboratories (UL) changed their label design three times since 1996. The new gold label should be attached to the cord or body of most office and home electrical products (please see the picture to the left). Holiday lights may have the UL marking in red or green instead of the universal black. A red UL mark indicates the product is approved for outdoor as well as indoor service. The green UL mark indicates the product is only to be used indoors. A small number of home electrical products may bear an Interteck (ETL) approval. This label is also acceptable. An Interteck label includes black print on a white background bearing the circular ETL logo. Most manufacturers are proud of their products and strive to gain name recognition as well as foster repeat business. This is not true of counterfeiters. The very first thing most counterfeiters try to do is make their products untraceable. Their products may bear the nation of origin but that is all. This is a common practice with metal components such as pipe fittings and flanges. This is also true of hoisting and rigging equipment such as shackles, turnbuckles and chain. Sadly, this has also occurred with the purchase of some safety equipment such as arc-flash retardant coveralls. Learn the national standards associated with products you are purchasing. Clearly specify these requirements on the procurements you make.
Costa Rica-Mitigation of Greenhouse Gas Emissions through Avoided...
Value Areas Jump to: navigation, search Name Costa Rica-Mitigation of Greenhouse Gas Emissions through Avoided Deforestation of Tropical Rainforests on Privately-owned Lands in...
Neutrinoless double beta decay
Petr Vogel
2006-11-17T23:59:59.000Z
The status of the search for neutrinoless double beta decay is reviewed. The effort to reach the sensitivity needed to cover the effective Majorana neutrino mass corresponding to the degenerate and inverted mass hierarchy is described. Various issues concerning the theory (and phenomenology) of the relation between the $0\
Neutrinoless Double Beta Decay
Heinrich Päs; Werner Rodejohann
2015-07-01T23:59:59.000Z
We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \\to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.
Neutrinoless Double Beta Decay
Päs, Heinrich
2015-01-01T23:59:59.000Z
We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \\to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.
B. King; A. Di Piazza; C. H. Keitel
2013-01-29T23:59:59.000Z
Double-slits provide incoming photons with a choice. Those that survive the passage have chosen from two possible paths which interfere to distribute them in a wave-like manner. Such wave-particle duality continues to be challenged and investigated in a broad range of disciplines with electrons, neutrons, helium atoms, C60 fullerenes, Bose-Einstein condensates and biological molecules. All variants have hitherto involved material constituents. We present a matterless double-slit scenario in which photons generated from virtual electron-positron pair annihilation in head-on collisions of a probe laser field with two ultra-intense laser beams form a double-slit interference pattern. Such electromagnetic fields are predicted to induce material-like behaviour in the vacuum, supporting elastic scattering between photons. Our double-slit scenario presents on the one hand a realisable method to observe photon-photon scattering, and demonstrates on the other, the possibility of both controlling light with light and non-locally investigating features of the quantum vacuum's structure.
DOUBLE MAJORS Imaging Science + ...
Zanibbi, Richard
DOUBLE MAJORS Imaging Science + ... Applied Mathematics Biomedical Sciences Computer Science Undergraduate Research Internships and Cooperative Education (Co-op) (optional) Study Abroad WHY IMAGING SCIENCE Science: BS, MS, PhD Color Science: MS, PhD BS + MS/PhD Combos HUMAN VISION BIO- MEDICAL ASTRO- PHYSICS
Double resonator cantilever accelerometer
Koehler, D.R.
1982-09-23T23:59:59.000Z
A digital quartz accelerometer includes a pair of spaced double-ended tuning forks fastened at one end to a base and at the other end through a spacer mass. Transverse movement of the resonator members stresses one and compresses the other, providing a differential frequency output which is indicative of acceleration.
Double resonator cantilever accelerometer
Koehler, Dale R. (Albuquerque, NM)
1984-01-01T23:59:59.000Z
A digital quartz accelerometer includes a pair of spaced double-ended tuning forks fastened at one end to a base and at the other end through a spacer mass. Transverse movement of the resonator members stresses one and compresses the other, providing a differential frequency output which is indicative of acceleration.
When DNA Needs to Stand Up and Be Counted
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
When DNA Needs to Stand Up and Be Counted When DNA Needs to Stand Up and Be Counted Print Wednesday, 31 May 2006 00:00 DNA microarrays are small metal, glass, or silicon chips...
WHY SEARCH FOR DOUBLE BETA DECAY?
Kayser, B.
2010-01-01T23:59:59.000Z
the search for neutrinoless double beta decay may prove verySearching for neutrinoless double beta decay is the onlysensitivity of neutrinoless double beta decay. The potential
Double field theory at order ??
Hohm, Olaf
We investigate ?? corrections of bosonic strings in the framework of double field theory. The previously introduced “doubled ??-geometry” gives ??-deformed gauge transformations arising in the Green-Schwarz anomaly ...
AVOIDING ILLEGAL STATES IN PSEUDORANDOM TESTING OF DIGITAL CIRCUITS
Stanford University
Center for Reliable Computing TECHNICAL REPORT AVOIDING ILLEGAL STATES IN PSEUDORANDOM TESTING can have. In this paper, we present two new techniques for detecting the illegal combinations of logic project), and by NSF under contract number CSL- FY00-28. Imprimatur: #12;Page ii AVOIDING ILLEGAL STATES
On Provably Safe Obstacle Avoidance for Autonomous Robotic Ground Vehicles
Platzer, André
as consumer products--such as autonomous household appliances [7] or driverless cars on regular Califor- nian manufacturing sites and in close proximity with humans. Thus, safety of motion and obstacle avoidance are vital safety features of such robots. We formally study two safety properties of avoiding both stationary
AIAA-2001-4232 Severe Weather Avoidance Using Informed
Valasek, John
AIAA-2001-4232 Severe Weather Avoidance Using Informed Heuristic Search S. Bokadia and J. Valasek, Suite 500, Reston, VA, 20191-4344. #12;AIAA 2001-4232 SEVERE WEATHER AVOIDANCE USING INFORMED HEURISTIC airport's terminal space3 . But an important issue in free flight is the safety of an airplane. Weather
Counting systems and the First Hilbert problem
Yaroslav D. Sergeyev
2012-03-14T23:59:59.000Z
The First Hilbert problem is studied in this paper by applying two instruments: a new methodology distinguishing between mathematical objects and mathematical languages used to describe these objects; and a new numeral system allowing one to express different infinite numbers and to use these numbers for measuring infinite sets. Several counting systems are taken into consideration. It is emphasized in the paper that different mathematical languages can describe mathematical objects (in particular, sets and the number of their elements) with different accuracies. The traditional and the new approaches are compared and discussed.
Nanal, Vandana [Dept. of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400 005 (India)
2011-11-23T23:59:59.000Z
At present, neutrinoless double beta decay is perhaps the only experiment that can tell us whether the neutrino is a Dirac or a Majorana particle. Given the significance of the 0{nu}{beta}{beta}, there is a widespread interest for these rare event studies employing a variety of novel techniques. This paper describes the current status of DBD experiments. The Indian effort for an underground NDBD experiment at the upcoming INO laboratory is also presented.
An outline for doubling solar panel efficiency C o l o ra do S c ho o l of M i ne s Ma g a z i ne QUANTUMQUANTUM DOTS #12;18 MINES Fall 2012 Colorado School of Mines Magazine 19 T Engineering a in Solar Power Take a look at a solar panel on a sunny Colorado day and, if you're like most people, you won't see
Pandharipande, R
2011-01-01T23:59:59.000Z
In the past 20 years, compactifications of the families of curves in algebraic varieties X have been studied via stable maps, Hilbert schemes, stable pairs, unramified maps, and stable quotients. Each path leads to a different enumeration of curves. A common thread is the use of a 2-term deformation/obstruction theory to define a virtual fundamental class. The richest geometry occurs when X is a nonsingular projective variety of dimension 3. We survey here the 13/2 principal ways to count curves with special attention to the 3-fold case. The different theories are linked by a web of conjectural relationships which we highlight. Our goal is to provide a guide for graduate students looking for an elementary route into the subject.
Autonomous robotic wheelchair with collision-avoidance navigation
Hsieh, Pin-Chun
2008-10-10T23:59:59.000Z
The objective of this research is to demonstrate a robotic wheelchair moving in an unknown environment with collision-avoidance navigation. A real-time path-planning algorithm was implemented by detecting the range to obstacles and by tracking...
Autonomous robotic wheelchair with collision-avoidance navigation
Hsieh, Pin-Chun
2008-10-10T23:59:59.000Z
The objective of this research is to demonstrate a robotic wheelchair moving in an unknown environment with collision-avoidance navigation. A real-time path-planning algorithm was implemented by detecting the range to obstacles and by tracking...
Hazard Avoidance in Wireless Sensor and Actor Networks
Sivakumar, Raghupathy
Hazard Avoidance in Wireless Sensor and Actor Networks Ramanuja Vedantham Zhenyun Zhuang Prof [Akyildiz'04] Network Low bandwidth (Hazards Hazards undesirable changes in the environment Reason for hazards Different latencies For different sensors and actors
Absolute nuclear material assay using count distribution (LAMBDA) space
Prasad, Manoj K. (Pleasanton, CA); Snyderman, Neal J. (Berkeley, CA); Rowland, Mark S. (Alamo, CA)
2012-06-05T23:59:59.000Z
A method of absolute nuclear material assay of an unknown source comprising counting neutrons from the unknown source and providing an absolute nuclear material assay utilizing a model to optimally compare to the measured count distributions. In one embodiment, the step of providing an absolute nuclear material assay comprises utilizing a random sampling of analytically computed fission chain distributions to generate a continuous time-evolving sequence of event-counts by spreading the fission chain distribution in time.
An active drop counting device using condenser microphone for superheated emulsion detector
Das, Mala; Marick, C.; Kanjilal, D.; Saha, S. [Nuclear and Atomic Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064 (India); Arya, A S. [Department of Physics, VIT University, Vellore, Tamilnadu 632014 (India)
2008-11-15T23:59:59.000Z
An active device for superheated emulsion detector is described. A capacitive diaphragm sensor or condenser microphone is used to convert the acoustic pulse of drop nucleation to electrical signal. An active peak detector is included in the circuit to avoid multiple triggering of the counter. The counts are finally recorded by a microprocessor based data acquisition system. Genuine triggers, missed by the sensor, were studied using a simulated clock pulse. The neutron energy spectrum of {sup 252}Cf fission neutron source was measured using the device with R114 as the sensitive liquid and compared with the calculated fission neutron energy spectrum of {sup 252}Cf. Frequency analysis of the detected signals was also carried out.
The MAJORANA experiment: an ultra-low background search for neutrinoless double-beta decay
Phillips, D.; Aguayo Navarrete, Estanislao; Avignone, Frank T.; Back, Henning O.; Barabash, Alexander S.; Bergevin, M.; Bertrand, F.; Boswell, M.; Brudanin, V.; Busch, Matthew; Chan, Yuen-Dat; Christofferson, Cabot-Ann; Collar, J. I.; Combs, Dustin C.; Cooper, R. J.; Detwiler, Jason A.; Doe, Peter J.; Efremenko, Yuri; Egorov, Viatcheslav; Ejiri, H.; Elliott, Steven R.; Esterline, James H.; Fast, James E.; Fields, N.; Finnerty, P.; Fraenkle, Florian; Gehman, Victor; Giovanetti, G. K.; Green, Matthew P.; Guiseppe, Vincente; Gusey, K.; Hallin, A. L.; Hazama, R.; Henning, Reyco; Hime, Andrew; Hoppe, Eric W.; Horton, Mark; Howard, Stanley; Howe, M. A.; Johnson, R. A.; Keeter, K.; Keller, C.; Kidd, Mary; Knecht, A.; Kochetov, Oleg; Konovalov, S.; Kouzes, Richard T.; LaFerriere, Brian D.; LaRoque, B. H.; Leon, Jonathan D.; Leviner, L.; Loach, J. C.; MacMullin, S.; Marino, Michael G.; Martin, R. D.; Mei, Dong-Ming; Merriman, Jason H.; Miller, M. L.; Mizouni, Leila; Nomachi, Masaharu; Orrell, John L.; Overman, Nicole R.; Poon, Alan; Perumpilly, Gopakumar; Prior, Gersende; Radford, D. C.; Rielage, Keith; Robertson, R. G. H.; Ronquest, M. C.; Schubert, Alexis G.; Shima, T.; Shirchenko, M.; Snavely, Kyle J.; Steele, David; Strain, J.; Thomas, K.; Timkin, V.; Tornow, W.; Vanyushin, I.; Varner, R. L.; Vetter, Kai; Vorren, Kris R.; Wilkerson, J. F.; Wolfe, B. A.; Yakushev, E.; Young, A.; Yu, Chang-Hong; Yumatov, Vladimir; Zhang, C.
2012-12-01T23:59:59.000Z
The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana Experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to validate whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak.
The Majorana experiment: an ultra-low background search for neutrinoless double-beta decay
D. G. Phillips II; E. Aguayo; F. T. Avignone III; H. O. Back; A. S. Barabash; M. Bergevin; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; Y. -D. Chan; C. D. Christofferson; J. I. Collar; D. C. Combs; R. J. Cooper; J. A. Detwiler; P. J. Doe; Y. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. Esterline; J. E. Fast; N. Fields; P. Finnerty; F. M. Fraenkle; V. M. Gehman; G. K. Giovanetti; M. P. Green; V. E. Guiseppe; K. Gusey; A. L. Hallin; R. Hazama; R. Henning; A. Hime; E. W. Hoppe; M. Horton; S. Howard; M. A. Howe; R. A. Johnson; K. J. Keeter; C. Keller; M. F. Kidd; A. Knecht; O. Kochetov; S. I. Konovalov; R. T. Kouzes; B. LaFerriere; B. H. LaRoque; J. Leon; L. E. Leviner; J. C. Loach; S. MacMullin; M. G. Marino; R. D. Martin; D. -M. Mei; J. Merriman; M. L. Miller; L. Mizouni; M. Nomachi; J. L. Orrell; N. R. Overman; A. W. P. Poon; G. Perumpilly; G. Prior; D. C. Radford; K. Rielage; R. G. H. Robertson; M. C. Ronquest; A. G. Schubert; T. Shima; M. Shirchenko; K. J. Snavely; D. Steele; J. Strain; K. Thomas; V. Timkin; W. Tornow; I. Vanyushin; R. L. Varner; K. Vetter; K. Vorren; J. F. Wilkerson; B. A. Wolfe; E. Yakushev; A. R. Young; C. -H. Yu; V. Yumatov; C. Zhang
2011-11-23T23:59:59.000Z
The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to determine whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak.
First AID (Atom counting for Isotopic Determination).
Roach, J. L. (Jeffrey L.); Israel, K. M. (Kimberly M.); Steiner, R. E. (Robert E.); Duffy, C. J. (Clarence J.); Roench, F. R. (Fred R.)
2002-01-01T23:59:59.000Z
Los Alamos National Laboratory (LANL) has established an in vitro bioassay monitoring program in compliance with the requirements in the Code of Federal Regulations, 10 CFR 835, Occupational Radiation Protection. One aspect of this program involves monitoring plutonium levels in at-risk workers. High-risk workers are monitored using the ultra-sensitive Therrnal Ionization Mass Spectrometry (TIMS) technique to ensure compliance with DOE standards. TIMS is used to measure atom ratios of 239Pua nd 240Puw ith respect to a tracer isotope ('Pu). These ratios are then used to calculate the amount of 239Pu and 240Pup resent. This low-level atom counting technique allows the calculation of the concentration levels of 239Pu and 240Pu in urine for at risk workers. From these concentration levels, dose assessments can be made and worker exposure levels can be monitored. Detection limits for TIMS analysis are on the order of millions of atoms, which translates to activity levels of 150 aCi 239Pua nd 500 aCi for 240Pu. pCi for Our poster presentation will discuss the ultra-sensitive, low-level analytical technique used to measure plutonium isotopes and the data verification methods used for validating isotopic measurements.
Weighted power counting and chiral dimensional regularization
Damiano Anselmi
2014-06-27T23:59:59.000Z
We define a modified dimensional-regularization technique that overcomes several difficulties of the ordinary technique, and is specially designed to work efficiently in chiral and parity violating quantum field theories, in arbitrary dimensions greater than 2. When the dimension of spacetime is continued to complex values, spinors, vectors and tensors keep the components they have in the physical dimension, therefore the $\\gamma $ matrices are the standard ones. Propagators are regularized with the help of evanescent higher-derivative kinetic terms, which are of the Majorana type in the case of chiral fermions. If the new terms are organized in a clever way, weighted power counting provides an efficient control on the renormalization of the theory, and allows us to show that the resulting chiral dimensional regularization is consistent to all orders. The new technique considerably simplifies the proofs of properties that hold to all orders, and makes them suitable to be generalized to wider classes of models. Typical examples are the renormalizability of chiral gauge theories and the Adler-Bardeen theorem. The difficulty of explicit computations, on the other hand, may increase.
Neutrinoless Double Phys 135c Spring 2007
Golwala, Sunil
Neutrinoless Double Beta Decay Phys 135c Spring 2007 Michael Mendenhall #12;Theory Overview #12 beta decays #12;neutrinoless double beta decays n e- p beta decay e #12;neutrinoless double beta decays n e- p beta decay e n e- p n e- p double beta decay e e #12;neutrinoless double beta decays n e- p
MODELING COUNT DATA FROM MULTIPLE SENSORS: A BUILDING OCCUPANCY MODEL
Ihler, Alexander
MODELING COUNT DATA FROM MULTIPLE SENSORS: A BUILDING OCCUPANCY MODEL Jon Hutchins, Alexander Ihler using real data from a network of optical counting sensors in a campus building. Index Terms--- sensor Knowledge of the number of people in a building at a given time is crucial for applications
MODELING COUNT DATA FROM MULTIPLE SENSORS: A BUILDING OCCUPANCY MODEL
Ihler, Alexander
MODELING COUNT DATA FROM MULTIPLE SENSORS: A BUILDING OCCUPANCY MODEL Jon Hutchins, Alexander Ihler using real data from a network of optical counting sensors in a campus building. Index Terms-- sensor Knowledge of the number of people in a building at a given time is crucial for applications
Energy conservation, counting statistics, and return to equilibrium
Jaksic, Vojkan
Energy conservation, counting statistics, and return to equilibrium V. JaksiÂ´c1 , J. Panangaden1 to the joint thermal equilibrium state, we study the Full Counting Statistics (FCS) of the energy transfers , A. Panati1,2 , C-A. Pillet2 1 Department of Mathematics and Statistics, McGill University, 805
Serial stimuli in the acquisition of discriminated avoidance
Hildbrand, Mary Kathleen
1971-01-01T23:59:59.000Z
higher rate of avoidance due to the efficacy of the first stimulus (Sl) in extending the length of the CS and avoiding the unconditioned stimulus (US), Purthermore, since anxiety is the basis of the efficiency of the conditioned stimulus (CS...) in producing behavior, and since this anxiety is classically conditioned to the CS, then after a large number of trials, the effects of higher-order conditioning ought to become manifest. Citations on the following pages follow the style of ~Ph 1 S Because...
Serial stimuli in the acquisition of discriminated avoidance
Hildbrand, Mary Kathleen
1971-01-01T23:59:59.000Z
SERIAL STINULI 1N THE ACQUISITION OF DISCRIMINATED AVOIDANCE A Thesis by NARY KATHLEEN HILDBRAND Submitted to the Graduate College of Texas A 6 N University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... August 1971 Ma)or Sub)ect: Psychology SERIAL STIMUKX IN THE AOgUISITION OF DISCRIMINATED AVOIDANCE A Thesis by Approved as to style and content by: (Chairmen of ommitte d of Department) ber) ber) (Member) AnSust 1971 ABSTRACT Serial Stimuli...
Distribution of the spacing between two adjacent avoided crossings
Manabu Machida; Keiji Saito
2005-09-29T23:59:59.000Z
We consider the frequency at which avoided crossings appear in an energy level structure when an external field is applied to a quantum chaotic system. The distribution of the spacing in the parameter between two adjacent avoided crossings is investigated. Using a random matrix model, we find that the distribution of these spacings is well fitted by a power-law distribution for small spacings. The powers are 2 and 3 for the Gaussian orthogonal ensemble and Gaussian unitary ensemble, respectively. We also find that the distributions decay exponentially for large spacings. The distributions in concrete quantum chaotic systems agree with those of the random matrix model.
J. I. Crespo-Anadón; for the Double Chooz collaboration
2014-12-11T23:59:59.000Z
The latest results from the Double Chooz experiment on the neutrino mixing angle $\\theta_{13}$ are presented. A detector located at an average distance of 1050 m from the two reactor cores of the Chooz nuclear power plant has accumulated a live time of 467.90 days, corresponding to an exposure of 66.5 GW-ton-year (reactor power $\\times$ detector mass $\\times$ live time). A revised analysis has boosted the signal efficiency and reduced the backgrounds and systematic uncertainties compared to previous publications, paving the way for the two detector phase. The measured $\\sin^2 2\\theta_{13} = 0.090^{+0.032}_{-0.029}$ is extracted from a fit to the energy spectrum. A deviation from the prediction above a visible energy of 4 MeV is found, being consistent with an unaccounted reactor flux effect, which does not affect the $\\theta_{13}$ result. A consistent value of $\\theta_{13}$ is measured in a rate-only fit to the number of observed candidates as a function of the reactor power, confirming the robustness of the result.
Morrell, Roger J. (Blommington, MN); Larson, David A. (Minneapolis, MN); Ruzzi, Peter L. (Eagan, MN)
1994-01-01T23:59:59.000Z
A double acting bit holder that permits bits held in it to be resharpened during cutting action to increase energy efficiency by reducing the amount of small chips produced. The holder consist of: a stationary base portion capable of being fixed to a cutter head of an excavation machine and having an integral extension therefrom with a bore hole therethrough to accommodate a pin shaft; a movable portion coextensive with the base having a pin shaft integrally extending therefrom that is insertable in the bore hole of the base member to permit the moveable portion to rotate about the axis of the pin shaft; a recess in the movable portion of the holder to accommodate a shank of a bit; and a biased spring disposed in adjoining openings in the base and moveable portions of the holder to permit the moveable portion to pivot around the pin shaft during cutting action of a bit fixed in a turret to allow front, mid and back positions of the bit during cutting to lessen creation of small chip amounts and resharpen the bit during excavation use.
Unified single-photon and single-electron counting statistics: From cavity QED to electron transport
Lambert, Neill [Advanced Science Institute, RIKEN, Saitama 351-0198 (Japan); Chen, Yueh-Nan [Department of Physics and National Center for Theoretical Sciences, National Cheng-Kung University, Tainan 701, Taiwan (China); Nori, Franco [Advanced Science Institute, RIKEN, Saitama 351-0198 (Japan); Physics Department, University of Michigan, Ann Arbor, MI 48109-1040 (United States)
2010-12-15T23:59:59.000Z
A key ingredient of cavity QED is the coupling between the discrete energy levels of an atom and photons in a single-mode cavity. The addition of periodic ultrashort laser pulses allows one to use such a system as a source of single photons--a vital ingredient in quantum information and optical computing schemes. Here we analyze and time-adjust the photon-counting statistics of such a single-photon source and show that the photon statistics can be described by a simple transport-like nonequilibrium model. We then show that there is a one-to-one correspondence of this model to that of nonequilibrium transport of electrons through a double quantum dot nanostructure, unifying the fields of photon-counting statistics and electron-transport statistics. This correspondence empowers us to adapt several tools previously used for detecting quantum behavior in electron-transport systems (e.g., super-Poissonian shot noise and an extension of the Leggett-Garg inequality) to single-photon-source experiments.
Electric heating units in pollination bags avoid damage
Paris-Sud XI, Université de
Electric heating units in pollination bags avoid damage to flowers by spring frost J. CH. FERRAND n'Orlgans Ardon, F 45160 Olivet Summary An effective, cheap and simple heating device was designed by INRA heating, Larix. Controlled crosses are essential for forest tree breeding, but spring frost can destroy
CHARACTERIZATION OF AN OPTICAL COLLISION AVOIDANCE SENSOR Kyle Watters
Hornsey, Richard
CHARACTERIZATION OF AN OPTICAL COLLISION AVOIDANCE SENSOR Kyle Watters , Cyrus Minwalla , Michael, unmanned aerial vehicles, sensor ar- ray 1. INTRODUCTION A prototype optical instrument is described detection' should be at a distance on the order of 5 km [2]. An optical sensor may have advantages in mass
Constrained Nonlinear Control Allocation with Singularity Avoidance using Sequential Quadratic
Johansen, Tor Arne
of this paper is that the cost function used for optimizing control allocation includes a term that penalizes1 Constrained Nonlinear Control Allocation with Singularity Avoidance using Sequential Quadratic Programming Tor A. Johansen£ , Thor I. Fossen£ and Svein P. Berge££ Abstract-- Control allocation problems can
Flocking with Obstacle Avoidance in Switching Networks of Interconnected Vehicles
Tanner, Herbert G.
control law can steer each ve- hicle based on local information that can be obtained from within avoiding collision. Motivated by Reynolds model, a set of decentralized control laws were developed [27, as the vehicles move the neighborhoods change discontinuously. The induced discontinuities in the control law
Brush Busters: How to Avoid Lumps When Treating Cut Stumps
McGinty, Allan; Ueckert, Darrell
2005-10-31T23:59:59.000Z
the spray mix, fill the tank to the final vol- ume. L-5421 10/05 How to Avoid Lumps When Treating Cut Stumps Two safe, effective, three-step ways to control many woody plants Individual Plant Treatment Series Allan McGinty, Professor and Extenson Range...
BAAP: Blackhole Attack Avoidance Protocol for Wireless Network
Dharmaraja, S.
BAAP: Blackhole Attack Avoidance Protocol for Wireless Network Saurabh Gupta Indian Institute without the contraint of special hardware and dependency on physical medium of wireless network. BAAP and router at the same time. Most of the previous research has focused on problems of routing
Packet Drop Avoidance for High-speed network transmission protocol
Jin, Guojun
2004-05-01T23:59:59.000Z
As network bandwidth continues to grow and longer paths are used to exchange large scientific data between storage systems and GRID computation, it has become increasingly obvious that there is a need to deploy a packet drop avoidance mechanism into network transmission protocols. Current end-to-end congestion avoidance mechanisms used in Transmission Control Protocol (TCP) have worked well on low bandwidth delay product networks, but with newer high-bandwidth delay networks they have shown to be inefficient and prone to unstable. This is largely due to increased network bandwidth coupled with changes in internet traffic patterns. These changes come from a variety of new network applications that are being developed to take advantage of the increased network bandwidth. This paper will examine the end-to-end congestion avoidance mechanism and perform a step-by-step analysis of its theory. In addition we will propose an alternative approach developed as part of a new network transmission protocol. Our alternative protocol uses a packet drop avoidance (PDA) mechanism built on top of the maximum burst size (MBS) theory combined with a real-time available bandwidth algorithm.
Obstacle Avoidance Control of Humanoid Robot Arm through Tactile Interaction
Tachi, Susumu
Obstacle Avoidance Control of Humanoid Robot Arm through Tactile Interaction Dzmitry Tsetserukou through tactile interaction. The implementation of the approach was realized on humanoid robot arm control are summarized and illustrated in this work as well. The controllable compliance of robot arm
tchen@engr.smu.edu How to Avoid Losing Your
Chen, Thomas M.
Tom Chen tchen@engr.smu.edu How to Avoid Losing Your Money and Identity to Phishing #12;TC/EE/2-16-05 SMU Engineering p. 2 · What is Phishing? · Examples · Risks and threats · Defenses Outline #12;TC/EE/2-16-05 SMU Engineering p. 3 What is Phishing? · A social engineering attack: - E-mail message (spam) appears
The fixed irreducible bridge ensemble for self-avoiding walks
Michael James Gilbert
2014-10-17T23:59:59.000Z
We define a new ensemble for self-avoiding walks in the upper half-plane, the fixed irredicible bridge ensemble, by considering self-avoiding walks in the upper half-plane up to their $n$-th bridge height, $Y_n$, and scaling the walk by $1/Y_n$ to obtain a curve in the unit strip, and then taking $n\\to\\infty$. We then conjecture a relationship between this ensemble to $\\SLE$ in the unit strip from $0$ to a fixed point along the upper boundary of the strip, integrated over the conjectured exit density of self-avoiding walk spanning a strip in the scaling limit. We conjecture that there exists a positive constant $\\sigma$ such that $n^{-\\sigma}Y_n$ converges in distribution to that of a stable random variable as $n\\to\\infty$. Then the conjectured relationship between the fixed irreducible bridge scaling limit and $\\SLE$ can be described as follows: If one takes a SAW considered up to $Y_n$ and scales by $1/Y_n$ and then weights the walk by $Y_n$ to an appropriate power, then in the limit $n\\to\\infty$, one should obtain a curve from the scaling limit of the self-avoiding walk spanning the unit strip. In addition to a heuristic derivation, we provide numerical evidence to support the conjecture and give estimates for the boundary scaling exponent.
Non-Gaussian extrema counts for CMB maps
Pogosyan, Dmitri [Department of Physics, University of Alberta, 11322-89 Avenue, Edmonton, Alberta, T6G 2G7 (Canada); Pichon, Christophe; Gay, Christophe [Institut d'astrophysique de Paris, 98, bis Boulevard Arago, 75 014, Paris (France)
2011-10-15T23:59:59.000Z
In the context of the geometrical analysis of weakly non-Gaussian cosmic microwave background maps, the 2D differential extrema counts as functions of the excursion set threshold is derived from the full moments expansion of the joint probability distribution of an isotropic random field, its gradient, and invariants of the Hessian. Analytic expressions for these counts are given to second order in the non-Gaussian correction, while a Monte Carlo method to compute them to arbitrary order is presented. Matching count statistics to these estimators is illustrated on fiducial non-Gaussian Planck data.
When DNA Needs to Stand Up and Be Counted
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
When DNA Needs to Stand Up and Be Counted Print DNA microarrays are small metal, glass, or silicon chips covered with patterns of short single-stranded DNA (ssDNA). These "DNA...
Tracking system for photon-counting laser radar
Chang, Joshua TsuKang
2007-01-01T23:59:59.000Z
The purpose of this thesis is to build the tracking system for a photon-counting laser radar specifically a laser radar that has the ability to perform direct and coherent detection measurement at low signal levels with ...
Algorithmic issues in queueing systems and combinatorial counting problems
Katz-Rogozhnikov, Dmitriy A
2008-01-01T23:59:59.000Z
(cont.) However, these randomized algorithms can never provide proven upper or lower bounds on the number of objects they are counting, but can only give probabilistic estimates. We propose a set of deterministic algorithms ...
Estimation and specification tests of count data recreation demand functions
Gomez, Irma Adriana
1991-01-01T23:59:59.000Z
ESTIMATION AND SPECIFICATION TESTS OF COUNT DATA RECREATION DEMAND FUNCTIONS A Thesis IRMA ADRIANA GOMEZ Submitted to the Office of Graduate Studies of Texas A8cM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 1991 Major Subject: Agricultural Economics ESTIMATION AND SPECIFICATION TESTS OF COUNT DATA RECREATION DEMAND FUNCTIONS A Thesis by IRMA ADRIANA GOMEZ Approved as to style and content by: T o a, Jr. (C a' of Committee) Lonnie...
A High Count Rate Beam Monitor for Thermal Neutrons
Barnett, Amanda [University of Tennessee, Knoxville (UTK); Crow, Lowell [ORNL; Diawara, Yacouba [ORNL; Funk, Loren L [ORNL; Hayward, J P [University of Tennessee, Knoxville (UTK); Menhard, Kocsis [European Synchrotron Radiation Facility (ESRF); Sedov, Vladislav N [ORNL
2012-01-01T23:59:59.000Z
Beam monitors are an important diagnostic tool in neutron science facilities. Present beam monitors use either ionization chambers in integration mode, which are slow and have no timing information, or pulse counters which can easily be saturated by high beam intensities. Neutron beam monitors indicate the number of neutrons incident on a scattering sample and allow neutron experimental data to be analyzed even when the source strength varies with time. At high flux neutron scattering facilities, neutron beam monitors with very low efficiency (10-5) are presently selected to keep the counting rate within a feasible range, even when a higher efficiency would improve the counting statistics and yield a better measurement of the incident beam. In this work, we report on a high count rate neutron beam monitor which also offers position sensitivity to provide a beam profile. This beam monitor offers good timing (less than 1 s) in addition to position resolution and will therefore improve the counting statistics at neutron energies up to 10 eV and allow moderator studies. The detector s main characteristics will be presented including its background rate, its count rate capability which is an order of magnitude higher than present counting monitors, and its efficiency for thermal neutrons.
Procuring and Implementing Solar Projects on Public Buildings: How to Avoid Common Pitfalls
Broader source: Energy.gov [DOE]
Procuring and Implementing Solar Projects on Public Buildings: How to Avoid Common Pitfalls Webinar.
Aris, John P.
sterile containers away from your face while working. Avoid coughing, sneezing, talking, etc while sterile
The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76
Schubert, Alexis G.; Aguayo, Estanislao; Avignone, F. T.; Zhang, C.; Back, Henning O.; Barabash, Alexander S.; Bergevin, M.; Bertrand, F.; Boswell, M.; Brudanin, V.; Busch, Matthew; Chan, Yuen-Dat; Christofferson, Cabot-Ann; Collar, J. I.; Combs, Dustin C.; Cooper, R. J.; Detwiler, Jason A.; Leon, Jonathan D.; Doe, Peter J.; Efremenko, Yuri; Egorov, Viatcheslav; Ejiri, H.; Elliott, S. R.; Esterline, James H.; Fast, James E.; Fields, N.; Finnerty, P.; Fraenkle, Florian; Gehman, Victor M.; Giovanetti, G. K.; Green, M.; Guiseppe, Vincente; Gusey, K.; Hallin, A. L.; Hazama, R.; Henning, Reyco; Hime, Andrew; Hoppe, Eric W.; Horton, Mark; Howard, Stanley; Howe, Mark; Johnson, R. A.; Keeter, K.; Keillor, Martin E.; Keller, C.; Kephart, Jeremy D.; Kidd, M. F.; Knecht, A.; Kochetov, Oleg; Konovalov, S.; Kouzes, Richard T.; LaFerriere, Brian D.; LaRoque, B. H.; Leviner, L.; Loach, J. C.; MacMullin, S.; Marino, Michael G.; Martin, R. D.; Mei, Dong-Ming; Merriman, Jason H.; Miller, M. L.; Mizouni, Leila; Nomachi, Masaharu; Orrell, John L.; Overman, Nicole R.; Phillips, D.; Poon, Alan; Perumpilly, Gopakumar; Prior, Gersende; Radford, D. C.; Rielage, Keith; Robertson, R. G. H.; Ronquest, M. C.; Shima, T.; Shirchenko, M.; Snavely, Kyle J.; Sobolev, V.; Steele, David; Strain, J.; Thomas, K.; Timkin, V.; Tornow, Werner; Vanyushin, I.; Varner, R. L.; Vetter, Kai; Vorren, Kris R.; Wilkerson, J. F.; Wolfe, B. A.; Yakushev, E.; Young, A.; Yu, Chang-Hong; Yumatov, Vladimir
2012-09-28T23:59:59.000Z
The observation of neutrinoless double-beta decay would determine whether the neutrino is a Majorana particle and provide information on the absolute scale of neutrino mass. The MAJORANA Collaboration is constructing the DEMONSTRATOR, an array of germanium detectors, to search for neutrinoless double-beta decay of 76Ge. The DEMONSTRATOR will contain 40 kg of germanium; up to 30 kg will be enriched to 86% in 76Ge. The DEMONSTRATOR will be deployed deep underground in an ultra-low-background shielded environment. Operation of the DEMONSTRATOR aims to determine whether a future tonne-scale germanium experiment can achieve a background goal of one count per tonne-year in a 4-keV region of interest around the 76Ge neutrinoless double-beta decay Q-value of 2039 keV.
The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76
MAJORANA Collaboration; A. G. Schubert; E. Aguayo; F. T. Avignone III; H. O. Back; A. S. Barabash; M. Bergevin; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; Y-D. Chan; C. D. Christofferson; J. I. Collar; D. C. Combs; R. J. Cooper; J. A. Detwiler; J. Leon; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. Esterline; J. E. Fast; N. Fields; P. Finnerty; F. M. Fraenkle; V. M. Gehman; G. K. Giovanetti; M. P. Green; V. E. Guiseppe; K. Gusey; A. L. Hallin; R. Hazama; R. Henning; A. Hime; E. W. Hoppe; M. Horton; S. Howard; M. A. Howe; R. A. Johnson; K. J. Keeter; M. E. Keillor; C. Keller; J. D. Kephart; M. F. Kidd; A. Knecht; O. Kochetov; S. I. Konovalov; R. T. Kouzes; B. LaFerriere; B. H. LaRoque; L. E. Leviner; J. C. Loach; S. MacMullin; M. G. Marino; R. D. Martin; D. -M. Mei; J. Merriman; M. L. Miller; L. Mizouni; M. Nomachi; J. L. Orrell; N. Overman; D. G. Phillips II; A. W. P. Poon; G. Perumpilly; G. Prior; D. C. Radford; K. Rielage; R. G. H. Robertson; M. C. Ronquest; T. Shima; M. Shirchenko; K. J. Snavely; V. Sobolev; D. Steele; J. Strain; K. Thomas; V. Timkin; W. Tornow; I. Vanyushin; R. L. Varner; K. Vetter; K. Vorren; J. F. Wilkerson; B. A. Wolfe; E. Yakushev; A. R. Young; C. ?H. Yu; V. Yumatov; C. Zhan
2011-09-07T23:59:59.000Z
The observation of neutrinoless double-beta decay would determine whether the neutrino is a Majorana particle and provide information on the absolute scale of neutrino mass. The MAJORANA Collaboration is constructing the DEMONSTRATOR, an array of germanium detectors, to search for neutrinoless double-beta decay of 76-Ge. The DEMONSTRATOR will contain 40 kg of germanium; up to 30 kg will be enriched to 86% in 76-Ge. The DEMONSTRATOR will be deployed deep underground in an ultra-low-background shielded environment. Operation of the DEMONSTRATOR aims to determine whether a future tonne-scale germanium experiment can achieve a background goal of one count per tonne-year in a 4-keV region of interest around the 76-Ge neutrinoless double-beta decay Q-value of 2039 keV.
Phase-space picture of resonance creation and avoided crossings
Timberlake, T
2000-01-01T23:59:59.000Z
Complex coordinate scaling (CCS) is used to calculate resonance eigenvalues and eigenstates for a system consisting of an inverted Gaussian potential and a monochromatic driving field. Floquet eigenvalues and Husimi distributions of resonance eigenfunctions are calculated using two different versions of CCS. The number of resonance states in this system increases as the strength of the driving field is increased, indicating that this system might have increased stability against ionization when the field strength is very high. We find that the newly created resonance states are scarred on unstable periodic orbits of the classical motion. The behavior of these periodic orbits as the field strength is increased may explain why there are more resonance states at high field strengths than at low field strengths. Close examination of an avoided crossing between resonance states shows that this type of avoided crossing does not delocalize the resonance states, although it may lead to interesting effects at certain ...
Phase-space picture of resonance creation and avoided crossings
T. Timberlake; L. E. Reichl
2000-10-01T23:59:59.000Z
Complex coordinate scaling (CCS) is used to calculate resonance eigenvalues and eigenstates for a system consisting of an inverted Gaussian potential and a monochromatic driving field. Floquet eigenvalues and Husimi distributions of resonance eigenfunctions are calculated using two different versions of CCS. The number of resonance states in this system increases as the strength of the driving field is increased, indicating that this system might have increased stability against ionization when the field strength is very high. We find that the newly created resonance states are scarred on unstable periodic orbits of the classical motion. The behavior of these periodic orbits as the field strength is increased may explain why there are more resonance states at high field strengths than at low field strengths. Close examination of an avoided crossing between resonance states shows that this type of avoided crossing does not delocalize the resonance states, although it may lead to interesting effects at certain field strengths.
Avoiding climate change uncertainties in Strategic Environmental Assessment
Larsen, Sanne Vammen, E-mail: sannevl@plan.aau.dk [The Danish Centre for Environmental Assessment, Aalborg University-Copenhagen, A.C. Meyers Vænge 15, 2450 København SV (Denmark); Kørnøv, Lone, E-mail: lonek@plan.aau.dk [The Danish Centre for Environmental Assessment, Aalborg University, Skibbrogade 5, 1. Sal, 9000 Aalborg (Denmark)] [The Danish Centre for Environmental Assessment, Aalborg University, Skibbrogade 5, 1. Sal, 9000 Aalborg (Denmark); Driscoll, Patrick, E-mail: patrick@plan.aau.dk [The Danish Centre for Environmental Assessment, Aalborg University-Copenhagen, A.C. Meyers Vænge 15, 2450 København SV (Denmark)] [The Danish Centre for Environmental Assessment, Aalborg University-Copenhagen, A.C. Meyers Vænge 15, 2450 København SV (Denmark)
2013-11-15T23:59:59.000Z
This article is concerned with how Strategic Environmental Assessment (SEA) practice handles climate change uncertainties within the Danish planning system. First, a hypothetical model is set up for how uncertainty is handled and not handled in decision-making. The model incorporates the strategies ‘reduction’ and ‘resilience’, ‘denying’, ‘ignoring’ and ‘postponing’. Second, 151 Danish SEAs are analysed with a focus on the extent to which climate change uncertainties are acknowledged and presented, and the empirical findings are discussed in relation to the model. The findings indicate that despite incentives to do so, climate change uncertainties were systematically avoided or downplayed in all but 5 of the 151 SEAs that were reviewed. Finally, two possible explanatory mechanisms are proposed to explain this: conflict avoidance and a need to quantify uncertainty.
The pathogen transmission avoidance theory of sexual selection
Loehle, C.
1997-08-01T23:59:59.000Z
The current theory that sexual selection results from female preference for males with good genes suffers from several problems. An alternative explanation, the pathogen transmission avoidance hypothesis, argues that the primary function of showy traits is to provide a reliable signal of current disease status, so that sick individuals can be avoided during mating. This study shows that a significant risk of pathogen transmission occurs during mating and that showy traits are reliable indicators of current disease status. The origin of female choosiness is argued to lie in a general tendency to avoid sick individuals, even in the absence of showy traits, which originate as exaggerations of normal traits that are indicative of good health (bright feathers, vigorous movement, large size). Thus, in this new model the origins of both showy traits and female choosiness are not problematic and there is no threshold effect. This model predicts that when the possession of male showy traits does not help to reduce disease in the female, showy traits are unlikely to occur. This case corresponds to thorough exposure of every animal to all group pathogens, on average, in large groups. Such species are shown with a large data set on birds to be less likely to exhibit showy traits. The good-genes model does not make this prediction. The pathogen transmission avoidance model can also lead to the evolution of showy traits even when selection is not effective against a given pathogen (e.g., when there is no heritable variation for resistance), but can result in selection for resistance if such genes are present. Monogamy is argued to reduce selection pressures for showy traits; data show monogamous species to be both less parasitized and less showy. In the context of reduction of pathogen transmission rates in showy populations, selection pressure becomes inversely frequency-dependent, which makes showy traits likely to be self-limiting rather than runaway.
Self-avoiding effective strings in lattice gauge theories
M. Caselle; F. Gliozzi
1991-11-28T23:59:59.000Z
It is shown that the effective string recently introduced to describe the long distance dynamics of 3D gauge systems in the confining phase has an intriguing description in terms of models of 2D self-avoiding walks in the dense phase. The deconfinement point, where the effective string becomes N=2 supersymmetric, may then be interpreted as the tricritical Theta point where the polymer chain undergoes a collapse transition. As a consequence, a universal value of the deconfinement temperature is predicted.
Predicting Neutrinoless Double Beta Decay
M. Hirsch; Ernest Ma; J. W. F. Valle; A. Villanova del Moral
2005-07-12T23:59:59.000Z
We give predictions for the neutrinoless double beta decay rate in a simple variant of the A_4 family symmetry model. We show that there is a lower bound for the neutrinoless double beta decay amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter |m_{ee}| >= 0.17 \\sqrt{\\Delta m^2_{ATM}}. This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on |m_{ee}| is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, neutrinoless double beta decay may be accessible to the next generation of high sensitivity experiments.
New Double Soft Emission Theorems
Freddy Cachazo; Song He; Ellis Ye Yuan
2015-03-16T23:59:59.000Z
We study the behavior of the tree-level S-matrix of a variety of theories as two particles become soft. By analogy with the recently found subleading soft theorems for gravitons and gluons, we explore subleading terms in double soft emissions. We first consider double soft scalar emissions and find subleading terms that are controlled by the angular momentum operator acting on hard particles. The order of the subleading theorems depends on the presence or not of color structures. Next we obtain a compact formula for the leading term in a double soft photon emission. The theories studied are a special Galileon, DBI, Einstein-Maxwell-Scalar, NLSM and Yang-Mills-Scalar. We use the recently found CHY representation of these theories in order to give a simple proof of the leading order part of all these theorems
Neutrinoless double beta decay experiments
K. Zuber
2006-10-04T23:59:59.000Z
The study of neutrinoless double beta decay is of outmost importance for neutrino physics. It is considered to be the gold plated channel to probe the fundamental character of neutrinos and to determine the neutrino mass. From the experimental point about nine different isotopes are explored for the search. After a general introduction follows a short discussion on nuclear matrix element calculations and supportive measurements. The current experimental status of double beta searches is presented followed by a short discussion of the ideas and proposals for large scale experiments.
Neutrinoless Double Beta Decay Constraints
Hiroaki Sugiyama
2003-07-25T23:59:59.000Z
A brief overview is given of theoretical analyses with neutrinoless double beta decay experiments. Theoretical bounds on the ``observable'', _betabeta, are presented. By using experimental bounds on _betabeta, allowed regions are obtained on the m_l-cos{2theta_12} plane, where m_l stands for the lightest neutrino mass. It is shown that Majorana neutrinos can be excluded by combining possible results of future neutrinoless double beta decay and {}^3H beta decay experiments. A possibility to constrain one of two Majorana phases is discussed also.
Double stranded nucleic acid biochips
Chernov, Boris; Golova, Julia
2006-05-23T23:59:59.000Z
This invention describes a new method of constructing double-stranded DNA (dsDNA) microarrays based on the use of pre-synthesized or natural DNA duplexes without a stem-loop structure. The complementary oligonucleotide chains are bonded together by a novel connector that includes a linker for immobilization on a matrix. A non-enzymatic method for synthesizing double-stranded nucleic acids with this novel connector enables the construction of inexpensive and robust dsDNA/dsRNA microarrays. DNA-DNA and DNA-protein interactions are investigated using the microarrays.
Neutrinoless double beta decay of 48Ca in the shell model: Closure versus nonclosure approximation
R. A. Sen'kov; M. Horoi
2013-12-16T23:59:59.000Z
Neutrinoless double-beta decay is a unique process that could reveal physics beyond the Standard Model. Essential ingredients in the analysis of neutrinoless double-beta rates are the associated nuclear matrix elements. Most of the approaches used to calculate these matrix elements rely on the closure approximation. Here we analyze the light neutrino-exchange matrix elements of 48Ca neutrinoless double-beta decay and test the closure approximation in a shell-model approach. We calculate the neutrinoless double-beta nuclear matrix elements for 48Ca using both the closure approximation and a nonclosure approach, and we estimate the uncertainties associated with the closure approximation. We demonstrate that the nonclosure approach has excellent convergence properties which allow us to avoid unmanageable computational cost. Combining the nonclosure and closure approaches we propose a new method of calculation for neutrinoless double-beta decay rates which can be applied to the neutrinoless double-beta decay rates of heavy nuclei, such as 76Ge or 82Se.
Modelling the Deep Counts: Luminosity Evolution, Dust and Faint Galaxies
Ana Campos; Tom Shanks
1995-11-23T23:59:59.000Z
In this paper we analyse the deep number counts problem, taking account of new observational and theoretical developments. First we show that the new Bruzual and Charlot (1993) models allow a new class of spiral dominated luminosity evolution (LE) model where significant amounts of the luminosity evolution needed to fit faint count data are due to spiral rather than early-type galaxies. Second we show that the inclusion of dust may be a vital ingredient for obtaining fits with any LE model. Third we compare the quality of fit of both the spiral and early-type LE models, including dust, for a wide variety of observational data. We find that parameters can be found for both LE models which allow a good fit to all data with the exception of the faintest B>25 counts in the case of q0=0.5 cosmologies, where some luminosity dependent evolution may be needed (see also Metcalfe et al 1995). Otherwise both these classes of LE model, with the inclusion of dust, provide an excellent foundation for understanding the B<25 galaxy counts and galaxy counts and redshift distributions in a variety of other wavebands.
Upper Limits from Counting Experiments with Multiple Pipelines
Patrick J. Sutton
2010-04-07T23:59:59.000Z
In counting experiments, one can set an upper limit on the rate of a Poisson process based on a count of the number of events observed due to the process. In some experiments, one makes several counts of the number of events, using different instruments, different event detection algorithms, or observations over multiple time intervals. We demonstrate how to generalize the classical frequentist upper limit calculation to the case where multiple counts of events are made over one or more time intervals using several (not necessarily independent) procedures. We show how different choices of the rank ordering of possible outcomes in the space of counts correspond to applying different levels of significance to the various measurements. We propose an ordering that is matched to the sensitivity of the different measurement procedures and show that in typical cases it gives stronger upper limits than other choices. As an example, we show how this method can be applied to searches for gravitational-wave bursts, where multiple burst-detection algorithms analyse the same data set, and demonstrate how a single combined upper limit can be set on the gravitational-wave burst rate.
Avoided Cost Rates, Environmental Externalities | OpenEI Community
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP a gHigh4-FD-a <AlaskaApplied EnergyAshton,Aurora GeothermalAvery County, NorthAvistaAvocadoAvoided
Quadratic $?'$-Corrections to Heterotic Double Field Theory
Kanghoon Lee
2015-04-01T23:59:59.000Z
We investigate $\\alpha'$-corrections of heterotic double field theory up to quadratic order in the language of supersymmetric O(D,D+dim G) gauged double field theory. After introducing double-vielbein formalism with a parametrization which reproduces heterotic supergravity, we show that supersymmetry for heterotic double field theory up to leading order $\\alpha'$-correction is obtained from supersymmetric gauged double field theory. We discuss the necessary modifications of the symmetries defined in supersymmetric gauged double field theory. Further, we construct supersymmetric completion at quadratic order in $\\alpha'$.
Large deviations of ergodic counting processes: a statistical mechanics approach
Budini, Adrian A
2011-01-01T23:59:59.000Z
The large-deviation method allows to characterize an ergodic counting process in terms of a thermodynamic frame where a free energy function determines the asymptotic non-stationary statistical properties of its fluctuations. Here, we study this formalism through a statistical mechanics approach, i.e., with an auxiliary counting process that maximizes an entropy function associated to the thermodynamic potential. We show that the realizations of this auxiliary process can be obtained after applying a conditional measurement scheme to the original ones, providing is this way an alternative measurement interpretation of the thermodynamic approach. General results are obtained for renewal counting processes, i.e., those where the time intervals between consecutive events are independent and defined by a unique waiting time distribution. The underlying statistical mechanics is controlled by the same waiting time distribution, rescaled by an exponential decay measured by the free energy function. A scale invarianc...
New multi-sample nonparametric tests for panel count data
Balakrishnan, N; 10.1214/08-AOS599
2009-01-01T23:59:59.000Z
This paper considers the problem of multi-sample nonparametric comparison of counting processes with panel count data, which arise naturally when recurrent events are considered. Such data frequently occur in medical follow-up studies and reliability experiments, for example. For the problem considered, we construct two new classes of nonparametric test statistics based on the accumulated weighted differences between the rates of increase of the estimated mean functions of the counting processes over observation times, wherein the nonparametric maximum likelihood approach is used to estimate the mean function instead of the nonparametric maximum pseudo-likelihood. The asymptotic distributions of the proposed statistics are derived and their finite-sample properties are examined through Monte Carlo simulations. The simulation results show that the proposed methods work quite well and are more powerful than the existing test procedures. Two real data sets are analyzed and presented as illustrative examples.
Constraining neutrinoless double beta decay
L. Dorame; D. Meloni; S. Morisi; E. Peinado; J. W. F. Valle
2011-11-23T23:59:59.000Z
A class of discrete flavor-symmetry-based models predicts constrained neutrino mass matrix schemes that lead to specific neutrino mass sum-rules (MSR). We show how these theories may constrain the absolute scale of neutrino mass, leading in most of the cases to a lower bound on the neutrinoless double beta decay effective amplitude.
Computation That Counts c 2004 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 615
Lyuu, Yuh-Dauh
Computation That Counts c 2004 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 615 Counting-Dauh Lyuu, National Taiwan University Page 616 Decision and Counting Problems · FP is the set of polynomial-Dauh Lyuu, National Taiwan University Page 617 A Counting Problem Harder than Its Decision Version · Some
Power-counting renormalizability of generalized Horava gravity
Visser, Matt
2009-01-01T23:59:59.000Z
In an earlier article [arXiv:0902.0590 [hep-th], Phys. Rev D80 (2009) 025011], I discussed the potential benefits of allowing Lorentz symmetry breaking in quantum field theories. In particular I discussed the perturbative power-counting finiteness of the normal-ordered :P(phi)^{z>=d}_{d+1}: scalar quantum field theories, and sketched the implications for Horava's model of quantum gravity. In the current rather brief addendum, I will tidy up some dangling issues and fill out some of the technical details of the argument indicating the power-counting renormalizability of a z>=d variant of Horava gravity in (d+1) dimensions.
Power-counting renormalizability of generalized Horava gravity
Matt Visser
2009-12-24T23:59:59.000Z
In an earlier article [arXiv:0902.0590 [hep-th], Phys. Rev D80 (2009) 025011], I discussed the potential benefits of allowing Lorentz symmetry breaking in quantum field theories. In particular I discussed the perturbative power-counting finiteness of the normal-ordered :P(phi)^{z>=d}_{d+1}: scalar quantum field theories, and sketched the implications for Horava's model of quantum gravity. In the current rather brief addendum, I will tidy up some dangling issues and fill out some of the technical details of the argument indicating the power-counting renormalizability of a z>=d variant of Horava gravity in (d+1) dimensions.
Future singularity avoidance in phantom dark energy models
Jaume de Haro
2012-06-11T23:59:59.000Z
Different approaches to quantum cosmology are studied in order to deal with the future singularity avoidance problem. Our results show that these future singularities will persist but could take different forms. As an example we have studied the big rip which appear when one considers the state equation $P=\\omega\\rho$ with $\\omega<-1$, showing that it does not disappear in modified gravity. On the other hand, it is well-known that quantum geometric effects (holonomy corrections) in loop quantum cosmology introduce a quadratic modification, namely proportional to $\\rho^2$, in Friedmann's equation that replace the big rip by a non-singular bounce. However this modified Friedmann equation could have been obtained in an inconsistent way, what means that the obtained results from this equation, in particular singularity avoidance, would be incorrect. In fact, we will show that instead of a non-singular bounce, the big rip singularity would be replaced, in loop quantum cosmology, by other kind of singularity.
Discovery of Highly Obscured Galaxies in the Zone of Avoidance
F. R. Marleau; A. Noriega-Crespo; R. Paladini; D. Clancy; S. Carey; S. Shenoy; K. E. Kraemer; T. Kuchar; D. R. Mizuno; S. Price
2008-05-16T23:59:59.000Z
We report the discovery of twenty-five previously unknown galaxies in the Zone of Avoidance. Our systematic search for extended extra-galactic sources in the GLIMPSE and MIPSGAL mid-infrared surveys of the Galactic plane has revealed two overdensities of these sources, located around l ~ 47 and 55 degrees and |b| less than 1 degree in the Sagitta-Aquila region. These overdensities are consistent with the local large-scale structure found at similar Galactic longitude and extending from |b| ~ 4 to 40 degrees. We show that the infrared spectral energy distribution of these sources is indeed consistent with those of normal galaxies. Photometric estimates of their redshift indicate that the majority of these galaxies are found in the redshift range z = 0.01 - 0.05, with one source located at z = 0.07. Comparison with known sources in the local Universe reveals that these galaxies are located at similar overdensities in redshift space. These new galaxies are the first evidence of a bridge linking the large-scale structure between both sides of the Galactic plane at very low Galactic latitude and clearly demonstrate the feasibility of detecting galaxies in the Zone of Avoidance using mid-to-far infrared surveys.
What can we learn from neutrinoless double beta decay experiments?
Bahcall, John N.
2009-01-01T23:59:59.000Z
Limits From Neutrinoless Double-Beta Decay (Rev. ),” ina next generation neutrinoless double beta decay search andPARTICLES? NO NEUTRINOLESS DOUBLE BETA DECAY AND INVERTED
The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge
Xu, W; Avignone, F T; Barabash, A S; Bertrand, F E; Brudanin, V; Busch, M; Buuck, M; Byram, D; Caldwell, A S; Chan, Y-D; Christofferson, C D; Cuesta, C; Detwiler, J A; Efremenko, Yu; Ejiri, H; Elliott, S R; Galindo-Uribarri, A; Giovanetti, G K; Goett, J; Green, M P; Gruszko, J; Guinn, I; Guiseppe, V E; Henning, R; Hoppe, E W; Howard, S; Howe, M A; Jasinski, B R; Keeter, K J; Kidd, M F; Konovalov, S I; Kouzes, R T; LaFerriere, B D; Leon, J; MacMullin, J; Martin, R D; Meijer, S J; Mertens, S; Orrell, J L; O'Shaughnessy, C; Overman, N R; Poon, A W P; Radford, D C; Rager, J; Rielage, K; Robertson, R G H; Romero-Romero, E; Ronquest, M C; Shanks, B; Shirchenko, M; Snyder, N; Suriano, A M; Tedeschi, D; Trimble, J E; Varner, R L; Vasilyev, S; Vetter, K; Vorren, K; White, B R; Wilkerson, J F; Wiseman, C; Yakushev, E; Yu, C-H; Yumatov, V
2015-01-01T23:59:59.000Z
Neutrinoless double-beta decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The Majorana Collaboration is constructing the Majorana Demonstrator, a 40-kg modular germanium detector array, to search for the Neutrinoless double-beta decay of 76Ge and to demonstrate a background rate at or below 3 counts/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge Neutrinoless double-beta decay. In this paper, we discuss the physics of neutrinoless double beta decay and...
The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge
Majorana Collaboration; W. Xu; N. Abgrall; F. T. Avignone III; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; C. Cuesta; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon; J. MacMullin; R. D. Martin; S. J. Meijer; S. Mertens; J. L. Orrell; C. O'Shaughnessy; N. R. Overman; A. W. P. Poon; D. C. Radford; J. Rager; K. Rielage; R. G. H. Robertson; E. Romero-Romero; M. C. Ronquest; B. Shanks; M. Shirchenko; N. Snyder; A. M. Suriano; D. Tedeschi; J. E. Trimble; R. L. Varner; S. Vasilyev; K. Vetter; K. Vorren; B. R. White; J. F. Wilkerson; C. Wiseman; E. Yakushev; C-H. Yu; V. Yumatov
2015-05-09T23:59:59.000Z
Neutrinoless double-beta decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The Majorana Collaboration is constructing the Majorana Demonstrator, a 40-kg modular germanium detector array, to search for the Neutrinoless double-beta decay of 76Ge and to demonstrate a background rate at or below 3 counts/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge Neutrinoless double-beta decay. In this paper, we discuss the physics of neutrinoless double beta decay and then focus on the Majorana Demonstrator, including its design and approach to achieve ultra-low backgrounds and the status of the experiment.
The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge
Majorana Collaboration; W. Xu; N. Abgrall; F. T. Avignone III; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; C. Cuesta; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon; J. MacMullin; R. D. Martin; S. J. Meijer; S. Mertens; J. L. Orrell; C. O'Shaughnessy; N. R. Overman; A. W. P. Poon; D. C. Radford; J. Rager; K. Rielage; R. G. H. Robertson; E. Romero-Romero; M. C. Ronquest; B. Shanks; M. Shirchenko; N. Snyder; A. M. Suriano; D. Tedeschi; J. E. Trimble; R. L. Varner; S. Vasilyev; K. Vetter; K. Vorren; B. R. White; J. F. Wilkerson; C. Wiseman; E. Yakushev; C-H. Yu; V. Yumatov
2015-01-13T23:59:59.000Z
Neutrinoless double-beta decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The Majorana Collaboration is constructing the Majorana Demonstrator, a 40-kg modular germanium detector array, to search for the Neutrinoless double-beta decay of 76Ge and to demonstrate a background rate at or below 3 counts/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge Neutrinoless double-beta decay. In this paper, we discuss the physics of neutrinoless double beta decay and then focus on the Majorana Demonstrator, including its design and approach to achieve ultra-low backgrounds and the status of the experiment.
Wu, Albert (Albert Puming)
2011-01-01T23:59:59.000Z
Dynamic obstacle avoidance is an important, ubiquitous, and often challenging problem for autonomous mobile robots. This thesis presents a new method to guarantee collision avoidance with respect to moving obstacles that ...
Paris-Sud XI, Université de
redundancy-based strategy for avoiding joint limits of a robot arm. This strategy is based on defining three avoidance strategy. The experimental results obtained on a 6 dof robot arm in eye-in hand visual servoing
Avoiding and Managing Interruptions of Electric Service Under an Interruptible Contract or Tariff
Evans, G. W.
1995-01-01T23:59:59.000Z
the customer to verify, after the fact, that an actual interruption could not have been avoided. The industrial should have the right to verify that the utility made every reasonable effort to avoid the interruption. Hourly generation data, load data...
Counting elements and geodesics in Thompson's group F
Rechnitzer, Andrew
Counting elements and geodesics in Thompson's group F Murray Elder School of Mathematics of Thompson's group F with standard generating set. The first of these requires exponential time . Key words: Group growth function, growth series, geodesic growth series, Thompson's group F 2008 MSC
Counting Mountain-Valley Assignments for Flat Folds
Hull, Thomas C.
Counting Mountain-Valley Assignments for Flat Folds Thomas Hull Department of Mathematics Merrimack), a mountain-valley (MV) assignment is a function f : E {M,V} which indicates which crease lines are con- vex can be thought of as a structural blueprint of the fold.) Creases come in two types: mountain creases
Note on refined topological vertex, Jack polynomials and instanton counting
Jianfeng Wu
2010-12-10T23:59:59.000Z
In this article, we calculated the refined topological vertex for the one parameter case using the Jack symmetric functions. Also, we obtain the partition function for elliptic N=2 models, the results coincide with those of Nekrasov instanton counting partition functions for the $N=2^{\\ast}$ theories.
The Relationship between Inner Product and Counting Cycles Xiaoming Sun
Tang, Pingzhong
The Relationship between Inner Product and Counting Cycles Xiaoming Sun ITCS, IIIS, Tsinghua xiaomings@tsinghua.edu.cn Chengu Wang ITCS, IIIS, Tsinghua wangchengu@gmail.com Wei Yu ITCS, IIIS, Tsinghua and Bob each holds a permutation of size n with the promise that there will be either a cycles or b cycles
Counting Packets Sent Between Arbitrary Internet Hosts Jeffrey Knockel
Crandall, Jedidiah R.
Counting Packets Sent Between Arbitrary Internet Hosts Jeffrey Knockel Dept. of Computer Science University of New Mexico jeffk@cs.unm.edu Jedidiah R. Crandall Dept. of Computer Science University of New Mexico crandall@cs.unm.edu Abstract In this paper we demonstrate a side-channel technique to infer
Coordinated avifaunal roadCounts (Car) Animal Demography Unit
de Villiers, Marienne
Coordinated avifaunal roadCounts (Car) Animal Demography Unit Department of Zoology University collected on that route. It is also a useful aid to anyone doing a route for the first time. CAR would like 14: wheat fields". Use CAR habitat and crop categories and mention which types of livestock
A people counting system based on dense and close stereovision.
Paris-Sud XI, Université de
systems in transit based on various technologies namely: infrared sensors, ultrasound, car- pet contact.meurie, louahdi.khoudour}@inrets.fr 2 University of Sciences and Technology of Lille, (LAGIS laboratory) Ecole of this work is to provide a precise counting system and adapted to buses environment. The process- ing chain
Count Percent 889 82.46% I do this.
Hammack, Richard
Respondents Q11. - - I reuse or recycle paper, cardboard, beverage containers, plastics #1, #2 and #7, tin and plastic disposable containers. #12;1077 Respondents Count Percent 653 60.63% I do this. 250 23.21% I and glass containers, electronics, furniture, envelopes and folders. I also compost and dispose of hazardous
Communication-Efficient Distributed Monitoring of Thresholded Counts
Cormode, Graham
this distributed networked systems, a princi- pal concern is monitoring: either monitoring the environment surCommunication-Efficient Distributed Monitoring of Thresholded Counts Ram Keralapura ECE Department cormode@lucent.com Jai Ramamirtham Bell Laboratories Bangalore, India jai@lucent.com ABSTRACT Monitoring
Voting, Vote Capture & Vote Counting Kennedy School of Government
Camp, L. Jean
Voting, Vote Capture & Vote Counting Symposium June 2004 Kennedy School of Government Harvard The following document was developed by Jean Camp, Allan Friedman and Warigia Bowman of the Kennedy School based and the Kennedy School of Government. A gift to support #12;2 Summary Best Practices Rebecca Mercuri's work
Nonequilibrium fluctuations, fluctuation theorems, and counting statistics in quantum systems
Mukamel, Shaul
equations and Green's functions techniques for computing the energy and particle statistics are presentedNonequilibrium fluctuations, fluctuation theorems, and counting statistics in quantum systems 1665 II. Two-Point Measurement Statistics 1668 A. The forward probability 1668 B. The time
29Counting Atoms in a Molecule The complex molecule Propanal
29Counting Atoms in a Molecule The complex molecule Propanal was discovered in a dense interstellar is the ratio of carbon atoms to hydrogen atoms in propanal? Problem 4 - If the mass of a hydrogen atom of a propanal molecule in AMUs? Problem 5 - What is the complete chemical formula for propanal? C3 H __ O
Broader source: Energy.gov [DOE]
Transcript of the webinar, "Procuring and Implementing Solar Projects on Public Buildings: How to Avoid Common Pitfalls."
Neutrinoless Double Beta Decay Experiments
Garfagnini, Alberto
2014-01-01T23:59:59.000Z
Neutrinoless double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are taking data and will provide new limits, should no signal be observed, in the next few years to come. The present contribution reviews the latest public results on double beta decay searches and gives an overview on the expected sensitivities of the experiments in construction which will be able to set stronger limits in the near future.
Neutrinoless Double Beta Decay Experiments
Alberto Garfagnini
2014-08-11T23:59:59.000Z
Neutrinoless double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are taking data and will provide new limits, should no signal be observed, in the next few years to come. The present contribution reviews the latest public results on double beta decay searches and gives an overview on the expected sensitivities of the experiments in construction which will be able to set stronger limits in the near future.
Design Study of an Incinerator Ash Conveyor Counting System - 13323
Jaederstroem, Henrik; Bronson, Frazier [Canberra Industries Inc., 800 Research Parkway Meriden CT 06450 (United States)] [Canberra Industries Inc., 800 Research Parkway Meriden CT 06450 (United States)
2013-07-01T23:59:59.000Z
A design study has been performed for a system that should measure the Cs-137 activity in ash from an incinerator. Radioactive ash, expected to consist of both Cs-134 and Cs-137, will be transported on a conveyor belt at 0.1 m/s. The objective of the counting system is to determine the Cs-137 activity and direct the ash to the correct stream after a diverter. The decision levels are ranging from 8000 to 400000 Bq/kg and the decision error should be as low as possible. The decision error depends on the total measurement uncertainty which depends on the counting statistics and the uncertainty in the efficiency of the geometry. For the low activity decision it is necessary to know the efficiency to be able to determine if the signal from the Cs-137 is above the minimum detectable activity and that it generates enough counts to reach the desired precision. For the higher activity decision the uncertainty of the efficiency needs to be understood to minimize decision errors. The total efficiency of the detector is needed to be able to determine if the detector will be able operate at the count rate at the highest expected activity. The design study that is presented in this paper describes how the objectives of the monitoring systems were obtained, the choice of detector was made and how ISOCS (In Situ Object Counting System) mathematical modeling was used to calculate the efficiency. The ISOCS uncertainty estimator (IUE) was used to determine which parameters of the ash was important to know accurately in order to minimize the uncertainty of the efficiency. The examined parameters include the height of the ash on the conveyor belt, the matrix composition and density and relative efficiency of the detector. (authors)
Three-dimensional terminally attached self-avoiding walks and bridges
Nathan Clisby; Andrew R. Conway; Anthony J. Guttmann
2015-07-24T23:59:59.000Z
We study terminally attached self-avoiding walks and bridges on the simple cubic lattice, both by series analysis and Monte Carlo methods. We provide strong numerical evidence supporting a scaling relation between self-avoiding walks, bridges, and terminally attached self-avoiding walks, and posit that a corresponding amplitude ratio is a universal quantity.
Three-dimensional terminally attached self-avoiding walks and bridges
Nathan Clisby; Andrew R. Conway; Anthony J. Guttmann
2015-04-08T23:59:59.000Z
We study terminally attached self-avoiding walks and bridges on the simple-cubic lattice, both by series analysis and Monte Carlo methods. We provide strong numerical evidence supporting a scaling relation between self-avoiding walks, bridges, and terminally attached self-avoiding walks, and posit that a corresponding amplitude ratio is a universal quantity.
An electron counting modification to potentials for covalently bonded surfaces
Wadley, Haydn
broadcasting systems, global po- sitioning systems, fiber optic drivers and receivers, collision avoidance predictions of bulk properties such as cohesive energy, lattice parameters, and elastic constants. We, infrared detectors, and solar cells.2 Each of these devices functions by manipulating the transport
Search for Neutrinoless Double-Beta Decay of $^{130}$Te with CUORE-0
K. Alfonso; D. R. Artusa; F. T. Avignone III; O. Azzolini; M. Balata; T. I. Banks; G. Bari; J. W. Beeman; F. Bellini; A. Bersani; M. Biassoni; C. Brofferio; C. Bucci; A. Caminata; L. Canonica; X. G. Cao; S. Capelli; L. Cappelli; L. Carbone; L. Cardani; N. Casali; L. Cassina; D. Chiesa; N. Chott; M. Clemenza; S. Copello; C. Cosmelli; O. Cremonesi; R. J. Creswick; J. S. Cushman; I. Dafinei; A. Dally; S. Dell'Oro; M. M. Deninno; S. DiDomizio; M. L. DiVacri; A. Drobizhev; L. Ejzak; D. Q. Fang; M. Faverzani; G. Fernandes; E. Ferri; F. Ferroni; E. Fiorini; S. J. Freedman; B. K. Fujikawa; A. Giachero; L. Gironi; A. Giuliani; P. Gorla; C. Gotti; T. D. Gutierrez; E. E. Haller; K. Han; E. Hansen; K. M. Heeger; R. Hennings-Yeomans; K. P. Hickerson; H. Z. Huang; R. Kadel; G. Keppel; Yu. G. Kolomensky; K. E. Lim; X. Liu; Y. G. Ma; M. Maino; M. Martinez; R. H. Maruyama; Y. Mei; N. Moggi; S. Morganti; S. Nisi; C. Nones; E. B. Norman; A. Nucciotti; T. O'Donnell; F. Orio; D. Orlandi; J. L. Ouellet; C. E. Pagliarone; M. Pallavicini; V. Palmieri; L. Pattavina; M. Pavan; M. Pedretti; G. Pessina; V. Pettinacci; G. Piperno; S. Pirro; S. Pozzi; E. Previtali; C. Rosenfeld; C. Rusconi; E. Sala; S. Sangiorgio; D. Santone; N. D. Scielzo; M. Sisti; A. R. Smith; L. Taffarello; M. Tenconi; F. Terranova; C. Tomei; S. Trentalange; G. Ventura; M. Vignati; S. L. Wagaarachchi; B. S. Wang; H. W. Wang; L. Wielgus; J. Wilson; L. A. Winslow; T. Wise; L. Zanotti; C. Zarra; G. Q. Zhang; B. X. Zhu; S. Zucchelli
2015-04-09T23:59:59.000Z
We report the results of a search for neutrinoless double-beta decay in a 9.8~kg$\\cdot$yr exposure of $^{130}$Te using a bolometric detector array, CUORE-0. The characteristic detector energy resolution and background level in the region of interest are $5.1\\pm 0.3{\\rm~keV}$ FWHM and $0.058 \\pm 0.004\\,(\\mathrm{stat.})\\pm 0.002\\,(\\mathrm{syst.})$~counts/(keV$\\cdot$kg$\\cdot$yr), respectively. The median 90%~C.L. lower-limit sensitivity of the experiment is $2.9\\times 10^{24}~{\\rm yr}$ and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of $^{130}$Te and place a Bayesian lower bound on the decay half-life, $T^{0\
Nano-optomechanical measurement in the photon counting regime
de Lépinay, Laure Mercier; Rohr, Sven; Gloppe, Arnaud; Kuhn, Aurélien; Verlot, Pierre; Dupont-Ferrier, Eva; Besga, Benjamin; Arcizet, Olivier
2015-01-01T23:59:59.000Z
Optically measuring in the photon counting regime is a recurrent challenge in modern physics and a guarantee to develop weakly invasive probes. Here we investigate this idea on a hybrid nano-optomechanical system composed of a nanowire hybridized to a single Nitrogen-Vacancy (NV) defect. The vibrations of the nanoresonator grant a spatial degree of freedom to the quantum emitter and the photon emission event can now vary in space and time. We investigate how the nanomotion is encoded on the detected photon statistics and explore their spatio-temporal correlation properties. This allows a quantitative measurement of the vibrations of the nanomechanical oscillator at unprecedentedly low light intensities in the photon counting regime when less than one photon is detected per oscillation period, where standard detectors are dark-noise-limited. These results have implications for probing weakly interacting nanoresonators, for low temperature experiments and for investigating single moving markers.
Synthesis of Reversible Functions Beyond Gate Count and Quantum Cost
Robert Wille; Mehdi Saeedi; Rolf Drechsler
2010-04-26T23:59:59.000Z
Many synthesis approaches for reversible and quantum logic have been proposed so far. However, most of them generate circuits with respect to simple metrics, i.e. gate count or quantum cost. On the other hand, to physically realize reversible and quantum hardware, additional constraints exist. In this paper, we describe cost metrics beyond gate count and quantum cost that should be considered while synthesizing reversible and quantum logic for the respective target technologies. We show that the evaluation of a synthesis approach may differ if additional costs are applied. In addition, a new cost metric, namely Nearest Neighbor Cost (NNC) which is imposed by realistic physical quantum architectures, is considered in detail. We discuss how existing synthesis flows can be extended to generate optimal circuits with respect to NNC while still keeping the quantum cost small.
Replacing Motors Counting Savings: Results from a 100 Motor Study
Kaufman, N. M.
2006-01-01T23:59:59.000Z
REPLACING MOTORS, COUNTING SAVINGS: RESULTS FROM A 100 MOTOR STUDY Nicole M. Kaufman Motor Systems Engineer Advanced Energy Raleigh, NC ABSTRACT Software tools such as MotorMaster+ aid facility personnel in conducting payback... analyses for replacing motors. These tools make assumptions on the motors’ operational efficiency in their calculations. By observing 100 pre-EPCA (Energy Policy & Conservation Act) motors in operation, removing them from service and conducting IEEE...
Mirror Symmetry, D-Branes and Counting Holomorphic Discs
Mina Aganagic; Cumrun Vafa
2000-12-05T23:59:59.000Z
We consider a class of special Lagrangian subspaces of Calabi-Yau manifolds and identify their mirrors, using the recent derivation of mirror symmetry, as certain holomorphic varieties of the mirror geometry. This transforms the counting of holomorphic disc instantons ending on the Lagrangian submanifold to the classical Abel-Jacobi map on the mirror. We recover some results already anticipated as well as obtain some highly non-trivial new predictions.
Power counting regime of chiral extrapolation and beyond
Derek Leinweber; Anthony Thomas; Ross Young
2005-09-29T23:59:59.000Z
Finite-range regularized chiral effective field theory is presented in the context of approximation schemes ubiquitous in modern lattice QCD calculations. Using FRR techniques, the power-counting regime (PCR) of chiral perturbation theory can be estimated. To fourth-order in the expansion at the 1% tolerance level, we find 0 {le} m{sub {pi}} {le} 180 MeV for the PCR, extending only a small distance beyond the physical pion mass.
Replacing Motors Counting Savings: Results from a 100 Motor Study
Kaufman, N. M.
2006-01-01T23:59:59.000Z
REPLACING MOTORS, COUNTING SAVINGS: RESULTS FROM A 100 MOTOR STUDY Nicole M. Kaufman Motor Systems Engineer Advanced Energy Raleigh, NC ABSTRACT Software tools such as MotorMaster+ aid facility personnel in conducting payback... analyses for replacing motors. These tools make assumptions on the motors’ operational efficiency in their calculations. By observing 100 pre-EPCA (Energy Policy & Conservation Act) motors in operation, removing them from service and conducting IEEE...
Power Counting Regime of Chiral Extrapolation and Beyond
Derek B. Leinweber; Anthony W. Thomas; Ross D. Young
2005-10-12T23:59:59.000Z
Finite-range regularised (FRR) chiral effective field theory is presented in the context of approximation schemes ubiquitous in modern lattice QCD calculations. Using FRR techniques, the power-counting regime (PCR) of chiral perturbation theory can be estimated. To fourth-order in the expansion at the 1% tolerance level, we find m_\\pi < 180 MeV for the PCR, extending only a small distance beyond the physical pion mass.
Automatic alpha-track counting with image analysis systems
Shymanski, Michael Joseph
1990-01-01T23:59:59.000Z
to establish an explanation of why an increased calibration factor, for a track counting system, is observed with increasing photometer readings. Second, TSD measurements were made for films irradiated with a depleted uranium source in order to determine... the usefulness of uranium as a fast exposure facility for quality control (QC) films for the etch process. The results of this work concluded that uranium was not a good QC source for the current etching process for the exposure methods used. Finally, total...
Avoidance of a Landau pole by flat contributions in QED
Klaczynski, Lutz, E-mail: lutz.klaczynski@gmx.de [Department of Physics, Humboldt University Berlin, 12489 Berlin (Germany); Kreimer, Dirk, E-mail: kreimer@mathematik.hu-berlin.de [Alexander von Humboldt Chair in Mathematical Physics, Humboldt University, Berlin 12489 (Germany)
2014-05-15T23:59:59.000Z
We consider massless Quantum Electrodynamics in the momentum scheme and carry forward an approach based on Dyson–Schwinger equations to approximate both the ?-function and the renormalized photon self-energy (Yeats, 2011). Starting from the Callan–Symanzik equation, we derive a renormalization group (RG) recursion identity which implies a non-linear ODE for the anomalous dimension and extract a sufficient but not necessary criterion for the existence of a Landau pole. This criterion implies a necessary condition for QED to have no such pole. Solving the differential equation exactly for a toy model case, we integrate the corresponding RG equation for the running coupling and find that even though the ?-function entails a Landau pole it exhibits a flat contribution capable of decreasing its growth, in other cases possibly to the extent that such a pole is avoided altogether. Finally, by applying the recursion identity, we compute the photon propagator and investigate the effect of flat contributions on both spacelike and timelike photons. -- Highlights: •We present an approach to approximate both the ?-function and the photon self-energy. •We find a sufficient criterion for the self-energy to entail the existence of a Landau pole. •We study non-perturbative ‘flat’ contributions that emerge within the context of our approach. •We discuss a toy model and how it is affected by flat contributions.
How to avoid common mistakes in energy efficiency projects
Stein, J. [E-Cube Inc., Boulder, CO (United States)
1996-12-31T23:59:59.000Z
Over the course of nearly 20 years in the energy efficiency industry, the author has participated in a wide variety of projects. These projects included analyses of buildings and industrial processes to identify energy efficiency measures and estimate their cost-effectiveness, as well as analyses of energy efficiency measures that were implemented to estimate how much energy was actually saved. This work was carried out at the behest of utility energy conservation departments, property managers, and energy service companies. Based on this experience, the author has identified a list of 14 common mistakes that are frequently repeated during energy efficiency projects: (1) Inadequate definition of purpose, (2) Selection of inappropriate analysis tools, (3) Poor data collection practices, (4) Inadequate definition of baseline for savings, (5) Inadequate reporting, (6) Insufficient analyst involvement in the design process, (7) Limited or inappropriate solutions, (8) Unnecessarily constrained economic analysis, (9) Neglect of interactions between building systems, (10) Loss of consistency during the design and installation phases, (11) Failure to verify and report on results, (12) Failure to test unfamiliar technologies, (13) Poor planning for monitoring exercises, and (14) Inadequate operation and maintenance of efficiency measures. This paper is concerned with the first 6 items on this list. The sections of this paper describe these errors in detail, explain the consequences of making them, give examples, and provide suggestions on how to avoid them.
Source Counts at 15 microns from the AKARI NEP Survey
Pearson, C P; Wada, T; Matsuhara, H; Lee, H M; Kim, S J; Takagi, T; Goto, T; Im, M S; Serjeant, S; Lee, M G; Ko, J W; White, G J; Ohyama, O
2010-01-01T23:59:59.000Z
We present galaxy counts at 15 microns using the Japanese AKARI satellite's NEP-deep and NEP-wide legacy surveys at the North Ecliptic Pole. The total number of sources detected are approximately 6700 and 10,700 down to limiting fluxes of 117 and 250 microJy (5 sigma) for the NEP-deep and NEP-wide survey respectively. We construct the Euclidean normalized differential source counts for both data sets (assuming 80 percent completeness levels of 200 and 270 microJy respectively) to produce the widest and deepest contiguous survey at 15 microns to date covering the entire flux range from the deepest to shallowest surveys made with the Infrared Space Observatory (ISO) over areas sufficiently significant to overcome cosmic variance, detecting six times as many sources as the largest survey carried out with ISO.We compare the results from AKARI with the previous surveys with ISO at the same wavelength and the Spitzer observations at 16 microns using the peek-up camera on its IRS instrument. The AKARI source counts ...
Modelling ISO Galaxy Counts with Luminosity and Merger Rate Evolution
Nathan Roche; Steve Eales
1998-12-10T23:59:59.000Z
We model galaxy evolution in the 6.75 and 15 micron passbands of the ISO satellite, by combining models of galaxy evolution at optical wavelengths (which are consistent with the optical galaxy counts) with observed spectral energy distributions in the infra-red. Our model is consistent with the local 12 micron galaxy luminosity, if 3.5 per cent of spirals at z=0 are in interacting pairs with mid-infra-red luminosities enhanced by major starbursts. Source counts from deep ISO surveys exceed non-evolving predictions but are more consistent with our evolving model. The steep number count of 6.75 micron sources appears to be explained primarily by evolving early-type galaxies, whereas at 15 microns the main contributors are star-forming spirals and starbursting interacting/merging galaxies. The 31 per cent of 15 micron sources which are visibly interacting galaxies have high mid-infra-red/optical flux ratios indicating major starbursts combined with dust extinction. The numbers and high mean redshift of these sources suggest the merger-starbursts are increasing in luminosity with redshift, approximately as (1+z)^2, in addition to undergoing (1+z)^2 number evolution reflecting the optically observed increase with redshift in the fraction of interacting galaxies.
Power counting renormalizability of quantum gravity in Lifshitz spacetime
Takayuki Hirayama
2012-10-25T23:59:59.000Z
We analyse the power counting renormalizability of the quantum field theory of Einstein or Einstein-Gauss-Bonnet gravity in D+2 dimensional Lifshitz spacetime. We show the spectral dimension becomes 2+(D/z) at the UV region where z is the critical exponent. Since it is larger than two, the quantum theory of Einstein gravity is not power counting renormalizable. For the pure Einstein-Gauss-Bonnet gravity, where Lifshitz spacetime is allowed only when the parameters are fine tuned, it happens that the graviton modes do not propagate and the quantum field theory is accidentally renormalizable when z>=D. Another method is discretizing the radial coordinate which changes the spectral dimension to 1+(D/z) at the UV region. Since our four dimensional spacetime is continuous, the four dimensional Lorentz symmetry is recovered at the low energy and the power counting renormalizability is still kept for z>=D, if the spacetime near the null singularity in Lifshitz spacetime is modified into AdS spacetime and the discrete radial direction is compactified like a brane world scenario. We also comment on the AdS/CFT correspondence.
Unified single-photon and single-electron counting statistics: from cavity-QED to electron transport
Neill Lambert; Yueh-Nan Chen; Franco Nori
2010-08-26T23:59:59.000Z
A key ingredient of cavity quantum-electrodynamics (QED) is the coupling between the discrete energy levels of an atom and photons in a single-mode cavity. The addition of periodic ultra-short laser pulses allows one to use such a system as a source of single photons; a vital ingredient in quantum information and optical computing schemes. Here, we analyze and ``time-adjust'' the photon-counting statistics of such a single-photon source, and show that the photon statistics can be described by a simple `transport-like' non-equilibrium model. We then show that there is a one-to-one correspondence of this model to that of non-equilibrium transport of electrons through a double quantum dot nanostructure. Then we prove that the statistics of the tunnelling electrons is equivalent to the statistics of the emitted photons. This represents a unification of the fields of photon counting statistics and electron transport statistics. This correspondence empowers us to adapt several tools previously used for detecting quantum behavior in electron transport systems (e.g., super-Poissonian shot noise, and an extension of the Leggett-Garg inequality) to single-photon-source experiments.
Unified single-photon and single-electron counting statistics: from cavity-QED to electron transport
Lambert, Neill; Nori, Franco
2010-01-01T23:59:59.000Z
A key ingredient of cavity quantum-electrodynamics (QED) is the coupling between the discrete energy levels of an atom and photons in a single-mode cavity. The addition of periodic ultra-short laser pulses allows one to use such a system as a source of single photons; a vital ingredient in quantum information and optical computing schemes. Here, we analyze and ``time-adjust'' the photon-counting statistics of such a single-photon source, and show that the photon statistics can be described by a simple `transport-like' non-equilibrium model. We then show that there is a one-to-one correspondence of this model to that of non-equilibrium transport of electrons through a double quantum dot nanostructure. Then we prove that the statistics of the tunnelling electrons is equivalent to the statistics of the emitted photons. This represents a unification of the fields of photon counting statistics and electron transport statistics. This correspondence empowers us to adapt several tools previously used for detecting qu...
Automated counting of cell bodies using Nissl stained cross-sectional images
D'Souza, Aswin Cletus
2008-10-10T23:59:59.000Z
the manual counting of cell numbers is a near impossible task considering the sizes and numbers involved, an automated approach is the obvious alternative to arrive at the cell count. In this thesis, a software application is described that automatically...
Automated counting of cell bodies using Nissl stained cross-sectional images
D'Souza, Aswin Cletus
2009-05-15T23:59:59.000Z
the manual counting of cell numbers is a near impossible task considering the sizes and numbers involved, an automated approach is the obvious alternative to arrive at the cell count. In this thesis, a software application is described that automatically...
Powered by NERSC, A Database of Billions of Genes and Counting...
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Powered by NERSC, a Database of Billions of Genes and Counting Powered by NERSC, a Database of Billions of Genes and Counting With More than a Billion Microbial genes, IMGM...
Neutrinoless Double Beta Decay: Present and Future
Oliviero Cremonesi
2002-10-04T23:59:59.000Z
Present status, and future plans for Double Beta Decay searches are reviewed. Given the recent observations of neutrino oscillations, a possibility to observe $\\beta\\beta(0\
A DOUBLE SMOOTHING TECHNIQUE FOR CONSTRAINED ...
2011-02-27T23:59:59.000Z
In this paper, we propose an efficient approach for solving a class of convex opti- ... accelerate our scheme, we introduce a novel double smoothing technique ...
Double perovskite catalysts for oxidative coupling
Campbell, K.D.
1991-01-01T23:59:59.000Z
Alkali metal doped double perovskites containing manganese and at least one of cobalt, iron and nickel are useful in the oxidative coupling of alkane to higher hydrocarbons.
Operator Analysis of Neutrinoless Double Beta Decay
Kiwoon Choi; Kwang Sik Jeong; Wan Young Song
2002-07-19T23:59:59.000Z
We study the effective operators of the standard model fields which would yield an observable rate of neutrinoless double beta decay. We particularly focus on the possibility that neutrinoless double beta decay is dominantly induced by lepton-number-violating higher dimensional operators other than the Majorana neutrino mass. Our analysis can be applied to models in which neutrinoless double beta decay is induced either by a strong dynamics or by quantum gravity effects at a fundamental scale near the TeV scale as well as the conventional models in which neutrinoless double beta decay is induced by perturbative renormalizable interactions.
Review of double beta decay experiments
A. S. Barabash
2014-03-12T23:59:59.000Z
The brief review of current experiments on search and studying of double beta decay processes is done. Best present limits on $\\langle m_{\
Coordinated avifaunal roadCounts (Car) inforMation sHeet no. 1 June 2013
de Villiers, Marienne
Coordinated avifaunal roadCounts (Car) inforMation sHeet no. 1 June 2013 HoW to Count This information sheet is intended as a guide for CAR counts anywhere in South Africa, but minor regional, your map and route description, relevant newsletter and the CAR roadcount form. Bird books, hat, lunch
Computation That Counts c 2006 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 620
Lyuu, Yuh-Dauh
Computation That Counts c 2006 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 620 #12 2006 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 621 #12;Decision and Counting Problems · FP direction is open. c 2006 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 622 #12;A Counting Problem
Computation That Counts c 2008 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 730
Lyuu, Yuh-Dauh
Computation That Counts c 2008 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 730 #12 2008 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 731 #12;Decision and Counting Problems · FP direction is open. c 2008 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 732 #12;A Counting Problem
Gong, Shaogang
CHEN, LOY, GONG, XIANG: FEATURE MINING FOR LOCALISED CROWD COUNTING 1 Feature Mining for Localised Crowd Counting Ke Chen1 cory@eecs.qmul.ac.uk Chen Change Loy2 ccloy@visionsemantics.com Shaogang Gong1 in print or electronic forms. #12;2 CHEN, LOY, GONG, XIANG: FEATURE MINING FOR LOCALISED CROWD COUNTING
Swimming in Flavored Water Leads to Avoidance of that Flavor in Laboratory Rats (Rattus Norvegicus)
Nakajima, Sadahiko
2015-01-01T23:59:59.000Z
study. The rat-in-flavored-water procedure, thus, departsreviewed Swimming in Flavored Water Leads to Avoidance ofthat swam in the flavored water. A statistically reliable
Predicting neutrinoless double beta decay
Hirsch, M.; Villanova del Moral, A.; Valle, J.W.F. [AHEP Group, Instituto de Fisica Corpuscular - C.S.I.C./Universitat de Valencia, Edificio Institutos de Paterna, Apt 22085, E-46071 Valencia (Spain); Ma, Ernest [Physics Department, University of California, Riverside, California 92521 (United States); Institute for Particle Physics Phenomenology, University of Durham, Durham, DH1 3LE (United Kingdom)
2005-11-01T23:59:59.000Z
We give predictions for the neutrinoless double beta decay rate in a simple variant of the A{sub 4} family symmetry model. We show that there is a lower bound for the {beta}{beta}{sub 0{nu}} amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter vertical bar m{sub ee} vertical bar {>=}0.17{radical}({delta}m{sub ATM}{sup 2}). This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on vertical bar m{sub ee} vertical bar is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, {beta}{beta}{sub 0{nu}} may be accessible to the next generation of high sensitivity experiments.
Fan, JiJi; Randall, Lisa; Reece, Matthew
2013-01-01T23:59:59.000Z
Based on observational tests and constraints on halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given the large number of particles and forces in the visible world, a more complex dark sector could be a reasonable or even likely possibility. This hypothesis leads to testable consequences, perhaps portending the discovery of a rich hidden world neighboring our own. We consider a scenario that readily satisfies current bounds that we call Partially Interacting Dark Matter (PIDM). This scenario contains self-interacting dark matter, but it is not the dominant component. Even if PIDM contains only a fraction of the net dark matter density, comparable to the baryonic fraction, the subdominant component's interactions can lead to interesting and potentially observable consequences. Our primary focus will be the special case of Double-Disk Dark Matter (DDDM), in which self-interactions allow the dark matter to lose enough energy to lead to dynamics similar ...
The tropical double description method
Allamigeon, Xavier; Goubault, Eric
2010-01-01T23:59:59.000Z
We develop a tropical analogue of the classical double description method allowing one to compute an internal representation (in terms of vertices) of a polyhedron defined externally (by inequalities). The heart of the tropical algorithm is a characterization of the extreme points of a polyhedron in terms of a system of constraints which define it. We show that checking the extremality of a point reduces to checking whether there is only one minimal strongly connected component in an hypergraph. The latter problem can be solved in almost linear time, which allows us to eliminate quickly redundant generators. We report extensive tests (including benchmarks from an application to static analysis) showing that the method outperforms experimentally the previous ones by orders of magnitude. The present tools also lead to worst case bounds which improve the ones provided by previous methods.
Double Integrals: GENERAL REGION The main difficulty in evaluating a double integral
Knopf, Dan
Double Integrals: GENERAL REGION The main difficulty in evaluating a double integral was being able to compute the single variable integrals that arose because the double integral could written as repeated single variable integrals and either choice of order of integration used. So we could always choose
Neutron counting and gamma spectroscopy with PVT detectors.
Mitchell, Dean James; Brusseau, Charles A.
2011-06-01T23:59:59.000Z
Radiation portals normally incorporate a dedicated neutron counter and a gamma-ray detector with at least some spectroscopic capability. This paper describes the design and presents characterization data for a detection system called PVT-NG, which uses large polyvinyl toluene (PVT) detectors to monitor both types of radiation. The detector material is surrounded by polyvinyl chloride (PVC), which emits high-energy gamma rays following neutron capture reactions. Assessments based on high-energy gamma rays are well suited for the detection of neutron sources, particularly in border security applications, because few isotopes in the normal stream of commerce have significant gamma ray yields above 3 MeV. Therefore, an increased count rate for high-energy gamma rays is a strong indicator for the presence of a neutron source. The sensitivity of the PVT-NG sensor to bare {sup 252}Cf is 1.9 counts per second per nanogram (cps/ng) and the sensitivity for {sup 252}Cf surrounded by 2.5 cm of polyethylene is 2.3 cps/ng. The PVT-NG sensor is a proof-of-principal sensor that was not fully optimized. The neutron detector sensitivity could be improved, for instance, by using additional moderator. The PVT-NG detectors and associated electronics are designed to provide improved resolution, gain stability, and performance at high-count rates relative to PVT detectors in typical radiation portals. As well as addressing the needs for neutron detection, these characteristics are also desirable for analysis of the gamma-ray spectra. Accurate isotope identification results were obtained despite the common impression that the absence of photopeaks makes data collected by PVT detectors unsuitable for spectroscopic analysis. The PVT detectors in the PVT-NG unit are used for both gamma-ray and neutron detection, so the sensitive volume exceeds the volume of the detection elements in portals that use dedicated components to detect each type of radiation.
On the counting of holomorphic discs in toric Fano manifolds
Cheol-Hyun Cho
2014-03-18T23:59:59.000Z
Open Gromov-Witten invariants in general are not well-defined. We discuss in detail the enumerative numbers of the Clifford torus $T^2$ in $\\CP^2$. For cyclic A-infinity algebras, we show that certain generalized way of counting may be defined up to Hochschild or cyclic boundary elements. In particular we obtain a well-defined function on Hochschild or cyclic homology of a cyclic A-infinity algebra, which has invariance property under cyclic A-infinity homomorphism. We discuss an example of Clifford torus $T^2$ and compute the invariant for a specific cyclic cohomology class.
The cosmology dependence of weak lensing cluster counts
Laura Marian; Robert E. Smith; Gary M. Bernstein
2009-06-30T23:59:59.000Z
We present the main results of a numerical study of weak lensing cluster counting. We examine the scaling with cosmology of the projected-density-peak mass function. Our main conclusion is that the projected-peak and the three-dimensional mass functions scale with cosmology in an astonishingly close way. This means that, despite being derived from a two-dimensional field, the weak lensing cluster abundance can be used to constrain cosmology in the same way as the three-dimensional mass function probed by other types of surveys.
Determination of glomerular filtration rate by external counting methods
Sartor, Tammy Lee
1981-01-01T23:59:59.000Z
comparing the DTPA to other accepted methods; the results were very favorable for the use of ggmTC-DTPA. Klopper et al. , sa1d mTc-DTPA ". . . rapidly prepared by a kit method, is a useful addition to the list of radiopharmaceuticals that can be used... points. First, the external counting method is suitable as a true means of determining the glomerular filtration rate (GFR). Second, the method is applicable to cats. To do this, five dogs were injected with ggmTc(Sn)-DTPA. Plasma samples were drawn...
Automatic alpha-track counting with image analysis systems
Shymanski, Michael Joseph
1990-01-01T23:59:59.000Z
concentration. Typical environmental concentrations of uranium and radium in soils are estimated as 40 Bq kg-' or approximately 1000 pCi kg-i (BEIR IV). This concentration typically results in a radon flux at the soil/atmosphere interface of 4. 5x10-~ Bq m-~ s-t... to establish an explanation of why an increased calibration factor, for a track counting system, is observed with increasing photometer readings. Second, TSD measurements were made for films irradiated with a depleted uranium source in order to determine...
Students Count -- From the Classroom to the Conference | Department of
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (MillionStructural Basis of Wnt Recognition byStructureStructuresStudent SummerEnergy Count --
Neutrinoless double beta decay and neutrino physics
Werner Rodejohann
2012-08-20T23:59:59.000Z
The connection of neutrino physics with neutrinoless double beta decay is reviewed. After presenting the current status of the PMNS matrix and the theoretical background of neutrino mass and lepton mixing, we will summarize the various implications of neutrino physics for double beta decay. The influence of light sterile neutrinos and other exotic modifications of the three neutrino picture is also discussed.
Double bevel construction of a diamond anvil
Moss, W.C.
1988-10-11T23:59:59.000Z
A double or multiple bevel culet geometry is used on a diamond anvil in a high pressure cell apparatus to provide increased sample pressure and stability for a given force applied to the diamond tables. Double or multiple bevel culet geometries can also be used for sapphire or other hard crystal anvils. Pressures up to and above 5 Megabars can be reached. 8 figs.
Double beta decay: experiments and theory review
A. Nucciotti
2007-07-28T23:59:59.000Z
Neutrinoless double beta decay is one of the most powerful tools to set the neutrino mass absolute scale and establish whether the neutrino is a Majorana particle. After a summary of the neutrinoless double beta decay phenomenology, the present status of the experimental search for this rare decay is reported and the prospects for next generation experiments are reviewed.
Reliability Estimation for Double Containment Piping
L. Cadwallader; T. Pinna
2012-08-01T23:59:59.000Z
Double walled or double containment piping is considered for use in the ITER international project and other next-generation fusion device designs to provide an extra barrier for tritium gas and other radioactive materials. The extra barrier improves confinement of these materials and enhances safety of the facility. This paper describes some of the design challenges in designing double containment piping systems. There is also a brief review of a few operating experiences of double walled piping used with hazardous chemicals in different industries. This paper recommends approaches for the reliability analyst to use to quantify leakage from a double containment piping system in conceptual and more advanced designs. The paper also cites quantitative data that can be used to support such reliability analyses.
Herschlag, Dan
Supporting Information: GM Giambau et al Ion counting from explicit solvent simulations and 3D, Stanford University, Stanford, CA 94305 USA; ¶ These authors contributed equally GM Giambau and T Luchko Information: GM Giambau et al Ion counting from explicit solvent simulations and 3D-RISM S02 Numerical
Number Count of Peaks in the CMB Map
Toshifumi Futamase; Masahiro Takada
2000-09-11T23:59:59.000Z
We investigate the dependence of cosmological parameters on the number count of peaks (local maxima and minima) in the cosmic microwave background (CMB) sky. The peak statistics contains the whole information of acoustic oscillations in the angular power spectrum $C_l$ over $l$-space and thus it can place complementary constraints on the cosmological parameters to those obtained from measurements of $C_l$. Based on the instrumental specifications of Planck, we find that the number count of peaks can provide new constraints on the combination of the matter density $\\Omega_{\\rm m}$ and the Hubble parameter $h$ approximately scaled as $\\Omega_{\\rm m} h^{-4.9}$ for a flat $\\Lambda$CDM model with $\\Omega_{m}=0.3$ and $h=0.7$. Therefore, we suggest that combining it with the constraints from $C_l$ scaled as $\\Omega_{m}h^{3.8}$ (or commonly $\\Omega_{\\rm m}h^2$) can potentially determine $\\Omega_{\\rm m}$ or equivalently solve the cosmic degeneracy by the CMB data alone.
Measuring primordial non-Gaussianity through weak lensing peak counts
Laura Marian; Stefan Hilbert; Robert E. Smith; Peter Schneider; Vincent Desjacques
2012-04-18T23:59:59.000Z
We explore the possibility of detecting primordial non-Gaussianity of the local type using weak lensing peak counts. We measure the peak abundance in sets of simulated weak lensing maps corresponding to three models f_NL={0, +100, -100}. Using survey specifications similar to those of Euclid and without assuming any knowledge of the lens and source redshifts, we find the peak functions of the non-Gaussian models with f_NL=+-100 to differ by up to 15% from the Gaussian peak function at the high-mass end. For the assumed survey parameters, the probability of fitting an f_NL=0 peak function to the f_NL=+-100 peak functions is less than 0.1%. Assuming the other cosmological parameters known, f_NL can be measured with an error \\Delta f_NL ~ 13. It is therefore possible that future weak lensing surveys like Euclid and LSST may detect primordial non-Gaussianity from the abundance of peak counts, and provide complementary information to that obtained from the cosmic microwave background.
Avoiding Distribution System Upgrade Costs Using Distributed Generation
Schienbein, Lawrence A.; Balducci, Patrick J.; Nguyen, Tony B.; Brown, Daryl R.; DeSteese, John G.; Speer, Gregory A.
2004-01-20T23:59:59.000Z
PNNL, in cooperation with three utilities, developed a database and methodology to analyze and characterize the avoided costs of Distributed Generation (DG) deployment as an alternative to traditional distribution system investment. After applying a number of screening criteria to the initial set of 307 cases, eighteen were selected for detailed analysis. Alternative DG investment scenarios were developed for these cases to permit capital, operation, maintenance, and fuel costs to be identified and incorporated into the analysis. The “customer-owned” backup power generator option was also investigated. The results of the analysis of the 18 cases show that none yielded cost savings under the alternative DG scenarios. However, the DG alternative systems were configured using very restrictive assumptions concerning reliability, peak rating, engine types and acceptable fuel. In particular it was assumed that the DG alternative in each case must meet the reliability required of conventional distribution systems (99.91% reliability). The analysis was further constrained by a requirement that each substation meet the demands placed upon it by a one in three weather occurrence. To determine if, by relaxing these requirements, the DG alternative might be more viable, one project was re-examined. The 99.91% reliability factor was still assumed for normal operating conditions but redundancy required to maintain reliability was relaxed for the relatively few hours every three years where extreme weather caused load to exceed present substation capacity. This resulted in the deferment of capital investment until later years and reduced the number of engines required for the project. The cost of both the conventional and DG alternative also dropped because the centralized power generation, variable O&M, and DG fuels costs were calculated based on present load requirements in combination with long-term forecasts of load growth, as opposed to load requirements plus a buffer based on predictions of extraordinary weather conditions. Application of the relaxed set of assumptions reduced the total cost of the DG alternative by roughly 57 percent from $7.0 million to $3.0 million. The reduction, however, did not change the overall result of the analysis, as the cost of the conventional distribution system upgrade alternative remained lower at $1.7 million. This paper also explores the feasibility of using a system of backup generators to defer investment in distribution system infrastructure. Rather than expanding substation capacity at substations experiencing slow load growth rates, PNNL considered a scenario where diesel generators were installed on location at customers participating in a program designed to offer additional power security and reliability to the customer and connection to the grid. The backup generators, in turn, could be used to meet peak demand for a limited number of hours each year, thus deferring distribution system investment. Data from an existing program at one of the three participating utilities was used to quantify the costs associated with the backup generator scenario. The results of the “customer owned” backup power generator analysis showed that in all cases the nominal cost of the DG scenario is more than the nominal cost of the base-case conventional distribution system upgrade scenario. However, in two of the cases the total present value costs of the alternative backup generator scenarios were between 15 and 22% less than those for the conventional scenarios. Overall, the results of the study offer considerable encouragement that the use of DG systems can defer conventional distribution system upgrades under the right conditions and when the DG configurations are intelligently designed. Using existing customer-owned DG to defer distribution system upgrades appears to be an immediate commercially-viable opportunity.
Computational investigations of folded self-avoiding walks related to protein folding
Paris-Sud XI, Université de
Computational investigations of folded self-avoiding walks related to protein folding Jacques M, protein folding, protein structure prediction 1. Introduction Self-avoiding walks (SAWs) have been studied, 9], authors of this manuscript have investigated some dynamic protein folding models. They have
Cross-Contamination Avoidance for Droplet Routing in Digital Microfluidic Biochips
Chakrabarty, Krishnendu
Cross-Contamination Avoidance for Droplet Routing in Digital Microfluidic Biochips Yang Zhao- contamination between droplets of different biomolecules can lead to erroneous outcomes for bioassays, the avoidance of cross- contamination during droplet routing is a key design challenge for biochips. We propose
Module Placement for Power Supply Noise and Wire Congestion Avoidance in 3D Packaging
Swaminathan, Madhavan
Module Placement for Power Supply Noise and Wire Congestion Avoidance in 3D Packaging Jacob Minz congestion minimization for 3D packaging. We employ decoupling capacitance insertion for noise suppression and 3D global routing for congestion avoidance. I. INTRODUCTION The m e potential of System-On-Package
Calibration, Information, and Control Strategies for Braking to Avoid a Collision
effect. A new model is introduced according to which braking is controlled by keeping the perceived idealCalibration, Information, and Control Strategies for Braking to Avoid a Collision Brett R. Fajen Rensselaer Polytechnic Institute This study explored visual control strategies for braking to avoid collision
Earthworm avoidance of biochar can be mitigated by wetting , William C. Hockaday b
Alvarez, Pedro J.
hydrocarbons (PAHs) formed during biochar production by pyrolysis. Nutrition deficiency was excludedEarthworm avoidance of biochar can be mitigated by wetting Dong Li a , William C. Hockaday b Keywords: Eisenia foetida Avoidance test Biochar Desiccation MDA SOD PAH a b s t r a c t Biochar has
Search for Neutrinoless Double Beta Decay with the CUORE experiment
Gorla, P. [Laboratori Nazionali del Gran Sasso-INFN, S.S. 17 bis, km 18-910 67010 Assergi (Italy)
2009-12-17T23:59:59.000Z
CUORE is a next generation experiment aimed at the detection of neutrinoless Double Beta Decay of the nuclide {sup 130}Te. The experiment, which will take place in the Gran Sasso National Laboratory (Italy), will look for this rare decay using the macrobolometric technique with a prospected array of 988 detectors. Each bolometer will be constituted by a 5x5x5 cm{sup 3} TeO{sub 2} crystal, for a total mass of about 200 kg of {sup 130}Te, and will be maintained at a temperature of 10 mK. CUORE will probe the effective mass of the neutrino with a sensitivity of a few tens of meV. If an excess of counts are observed above background at the 2.5 MeV corresponding to the Q-value of the decay, CUORE will answer several questions that are still open in the field of neutrino physics, such as the determination of the particle's Majorana nature and of the absolute mass scale. A prototype for CUORE in Gran Sasso, named CUORICINO, has just closed after five years proving its importance as a stand-alone experiment.
Neutrinoless Double Beta Decay in Light of SNO Salt Data
Murayama, Hitoshi
2009-01-01T23:59:59.000Z
Limits From Neutrinoless Double-Beta Decay (Rev. ),” incan also cause neutrinoless double-beta decay (see e.g. , [LBNL-53996 Neutrinoless Double Beta Decay in Light of SNO
A Search for Neutrinoless Double Beta Decay of Te-130
Bryant, Adam Douglas
2010-01-01T23:59:59.000Z
A Search for Neutrinoless Double Beta Decay of Te by AdamA Search for Neutrinoless Double Beta Decay of CopyrightA Search for Neutrinoless Double Beta Decay of Te by Adam
Neutrinoless Double Beta Decay and Neutrino Masses
Michael Duerr
2012-06-04T23:59:59.000Z
Neutrinoless double beta decay is a promising test for lepton number violating physics beyond the standard model of particle physics. There is a deep connection between this decay and the phenomenon of neutrino masses. In particular, we will discuss the relation between neutrinoless double beta decay and Majorana neutrino masses provided by the so-called Schechter--Valle theorem in a quantitative way. Furthermore, we will present an experimental cross check to discriminate neutrinoless double beta decay from unknown nuclear background using only one isotope, i.e., within one experiment.
Development of double-decker pulse radiolysis
Kan, K.; Kondoh, T.; Yang, J.; Ogata, A.; Norizawa, K.; Yoshida, Y. [Institute of Scientific and Industrial Research, Osaka University, Osaka (Japan)
2012-07-15T23:59:59.000Z
Double-decker pulse radiolysis (DDPR), which utilizes double-decker electron beams, was investigated to develop a new pulse radiolysis with a high time resolution. The double-decker electron beams were generated by injecting two UV pulses into a photocathode radio-frequency gun. In the pulse radiolysis, one electron beam was used as a pump beam, and the other was converted to a probe pulse. Finally, as its first application, the DDPR was successfully used for observing solvated electrons in water, with a 10%-90% rise time of 8.6 ps.
Search for: "neutrinoless double beta decay" | DOE PAGES
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neutrinoless double beta decay" Find + Advanced Search Advanced Search All Fields: "neutrinoless double beta decay" Title: Full Text: Bibliographic Data: Creator Author: Name...
Molecular Dynamics Study of the Electrical Double Layer at Silver...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Electrical Double Layer at Silver Chloride Electrolyte Interfaces. Molecular Dynamics Study of the Electrical Double Layer at Silver Chloride Electrolyte Interfaces. Abstract:...
The linear power spectrum of observed source number counts
Challinor, Anthony
2011-01-01T23:59:59.000Z
We relate the observable number of sources per solid angle and redshift to the underlying proper source density and velocity, background evolution and line-of-sight potentials. We give an exact result in the case of linearized perturbations assuming general relativity. This consistently includes contributions of the source density perturbations and redshift distortions, magnification, radial displacement, and various additional linear terms that are small on sub-horizon scales. In addition we calculate the effect on observed luminosities, and hence the result for sources observed as a function of flux, including magnification bias and radial-displacement effects. We give the corresponding linear result for a magnitude-limited survey at low redshift, and discuss the angular power spectrum of the total count distribution. We also calculate the cross-correlation with the CMB polarization and temperature including Doppler source terms, magnification, redshift distortions and other velocity effects for the sources...
Certified counting of roots of random univariate polynomials
Joseph Cleveland; Jeffrey Dzugan; Jonathan D. Hauenstein; Ian Haywood; Dhagash Mehta; Anthony Morse; Leonardo Robol; Taylor Schlenk
2014-12-04T23:59:59.000Z
A challenging problem in computational mathematics is to compute roots of a high-degree univariate random polynomial. We combine an efficient multiprecision implementation for solving high-degree random polynomials with two certification methods, namely Smale's $\\alpha$-theory and one based on Gerschgorin's theorem, for showing that a given numerical approximation is in the quadratic convergence region of Newton's method of some exact solution. With this combination, we can certifiably count the number of real roots of random polynomials. We quantify the difference between the two certification procedures and list the salient features of both of them. After benchmarking on random polynomials where the coefficients are drawn from the Gaussian distribution, we obtain novel experimental results for the Cauchy distribution case.
The normalization of citation counts based on classification systems
Bornmann, Lutz; Barth, Andreas
2013-01-01T23:59:59.000Z
If we want to assess whether the paper in question has had a particularly high or low citation impact compared to other papers, the standard practice in bibliometrics is to normalize citations in respect of the subject category and publication year. A number of proposals for an improved procedure in the normalization of citation impact have been put forward in recent years. Against the background of these proposals this study describes an ideal solution for the normalization of citation impact: in a first step, the reference set for the publication in question is collated by means of a classification scheme, where every publication is associated with a single principal research field or subfield entry (e. g. via Chemical Abstracts sections) and a publication year. In a second step, percentiles of citation counts are calculated for this set and used to assign the normalized citation impact score to the publications (and also to the publication in question).
Solar neutrino-electron scattering as background limitation for double beta decay
N. F. de Barros; K. Zuber
2011-09-16T23:59:59.000Z
The background on double beta decay searches due to elastic electron scattering of solar neutrinos of all double beta emitters with Q-value larger than 2 MeV is calculated, taking into account survival probability and flux uncertainties of solar neutrinos. This work determines the background level to be [1-2]E-7 counts /keV/kg/yr, depending on the precise Q-value of the double beta emitter. It is also shown that the background level increases dramatically if going to lower Q-values. Furthermore, studies are done for various detector systems under consideration for next generation experiments. It was found that experiments based on loaded liquid scintillator have to expect a higher background. Within the given nuclear matrix element uncertainties any approach exploring the normal hierarchy has to face this irreducible background, which is a limitation on the minimal achievable background for purely calorimetric approaches. Large scale liquid scintillator experiments might encounter this problem already while exploring the inverted hierarchy. Potential caveats by using more sophisticated experimental setups are also discussed.
The majorana demonstrator: A search for neutrinoless double-beta decay of ??Ge
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Xu, W.; Abgrall, N.; Avignone, F. T.; Barabash, A. S.; Bertrand, F. E.; Brudanin, V.; Busch, M.; Buuck, M.; Byram, D.; Caldwell, A. S.; et al
2015-05-01T23:59:59.000Z
Neutrinoless double-beta (0???) decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The Majorana Collaboration is constructing the MAJORANA DEMONSTRATOR, with a total of 40-kg Germanium detectors,more »to search for the 0??? decay of ??Ge and to demonstrate a background rate at or below 3 counts/(ROI•t•y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for ??Ge 0??? decay. In this paper, we discuss the physics of neutrinoless double beta decay and then focus on the MAJORANA DEMONSTRATOR, including its design and approach to achieve ultra-low backgrounds and the status of the experiment.« less
JiJi Fan; Andrey Katz; Lisa Randall; Matthew Reece
2013-07-31T23:59:59.000Z
Based on observational constraints on large scale structure and halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given the large number of particles and forces in the visible world, a more complex dark sector could be a reasonable or even likely possibility. This hypothesis leads to testable consequences, perhaps portending the discovery of a rich hidden world neighboring our own. We consider a scenario that readily satisfies current bounds that we call Partially Interacting Dark Matter (PIDM). This scenario contains self-interacting dark matter, but it is not the dominant component. Even if PIDM contains only a fraction of the net dark matter density, comparable to the baryonic fraction, the subdominant component's interactions can lead to interesting and potentially observable consequences. Our primary focus will be the special case of Double-Disk Dark Matter (DDDM), in which self-interactions allow the dark matter to lose enough energy to lead to dynamics similar to those in the baryonic sector. We explore a simple model in which DDDM can cool efficiently and form a disk within galaxies, and we evaluate some of the possible observational signatures. The most prominent signal of such a scenario could be an enhanced indirect detection signature with a distinctive spatial distribution. Even though subdominant, the enhanced density at the center of the galaxy and possibly throughout the plane of the galaxy can lead to large boost factors, and could even explain a signature as large as the 130 GeV Fermi line. Such scenarios also predict additional dark radiation degrees of freedom that could soon be detectable and would influence the interpretation of future data, such as that from Planck and from the Gaia satellite. We consider this to be the first step toward exploring a rich array of new possibilities for dark matter dynamics.
David Curtin; Yuhsin Tsai
2014-12-04T23:59:59.000Z
In most models of the dark sector, dark matter is charged under some new symmetry to make it stable. We explore the possibility that not just dark matter, but also the force carrier connecting it to the visible sector is charged under this symmetry. This dark mediator then acts as a Double-Dark Portal. We realize this setup in the \\emph{dark mediator Dark matter} model (dmDM), featuring a fermionic DM candidate $\\chi$ with Yukawa couplings to light scalars $\\phi_i$. The scalars couple to SM quarks via the operator $\\bar q q \\phi_i^* \\phi_j/\\Lambda_{ij}$. This can lead to large direct detection signals via the $2\\rightarrow3$ process $\\chi N \\rightarrow \\chi N \\phi$ if one of the scalars has mass $ \\lesssim 10$ keV. For dark matter Yukawa couplings $y_\\chi \\sim 10^{-3} - 10^{-2}$, dmDM features a thermal relic dark matter candidate while also implementing the SIDM scenario for ameliorating inconsistencies between dwarf galaxy simulations and observations. We undertake the first systematic survey of constraints on light scalars coupled to the SM via the above operator. The strongest constraints are derived from a detailed examination of the light mediator's effects on stellar astrophysics. LHC experiments and cosmological considerations also yield important bounds. Observations of neutron star cooling exclude the minimal model with one dark mediator, but a scenario with two dark mediators remains viable and can give strong direct detection signals. We explore the direct detection consequences of this scenario and find that a heavy $\\mathcal{O}(100)$ GeV dmDM candidate fakes different $\\mathcal{O}(10)$ GeV WIMPs at different experiments. Large regions of dmDM parameter space are accessible above the irreducible neutrino background.
Phenomenology of neutrinoless double beta decay
J. J. Gómez-Cadenas; Justo Martín-Albo
2015-02-25T23:59:59.000Z
This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.
Probing neutrinoless double beta decay with SNO+
Evelina Arushanova; Ashley R. Back
2015-05-01T23:59:59.000Z
Probing neutrinoless double beta decay is one of the primary goals for SNO+, SNOLAB's multi-purpose neutrino detector. In order to achieve this goal the SNO detector has been adapted so that it can be filled with Te-loaded liquid scintillator. During the initial double beta phase the target loading is 0.3% natural Te, which equates to $\\sim790$ kg of double beta isotope. Estimating the sensitivity to neutrinoless double beta decay requires a well understood background model. For SNO+ this is provided by a comprehensive study considering all possible background contributions, whether they originate from within the liquid scintillator cocktail, the surrounding parts of the detector or other irreducible backgrounds. Given these considerations, for five years running in the initial phase, the expected sensitivity is $T_{1/2}^{0\
Probing neutrinoless double beta decay with SNO+
Arushanova, Evelina
2015-01-01T23:59:59.000Z
Probing neutrinoless double beta decay is one of the primary goals for SNO+, SNOLAB's multi-purpose neutrino detector. In order to achieve this goal the SNO detector has been adapted so that it can be filled with Te-loaded liquid scintillator. During the initial double beta phase the target loading is 0.3% natural Te, which equates to $\\sim790$ kg of double beta isotope. Estimating the sensitivity to neutrinoless double beta decay requires a well understood background model. For SNO+ this is provided by a comprehensive study considering all possible background contributions, whether they originate from within the liquid scintillator cocktail, the surrounding parts of the detector or other irreducible backgrounds. Given these considerations, for five years running in the initial phase, the expected sensitivity is $T_{1/2}^{0\
Phenomenology of neutrinoless double beta decay
Gómez-Cadenas, J J
2015-01-01T23:59:59.000Z
This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.
Double bevel construction of a diamond anvil
Moss, W.C.
1987-02-06T23:59:59.000Z
Use of double or multiple bevel culet geometry on a diamond anvil to provide increased sample pressure and stability for a given force applied to the diamond tables. 7 figs.
Double Importance Sampling Val'erie Ventura
Double Importance Sampling Val'erie Ventura Department of Statistics Carnegie Mellon University (Newton and Geyer, 1994, Ventura, 1998), where estimation must be made with respect to many first
CP Violation in Neutrinoless Double Beta Decay
T. Fukuyama; K. Matsuda; H. Nishiura
1997-08-19T23:59:59.000Z
We argue three-flavour neutrino mixing. We consider the neutrinos as Majorana particles and see how the neutrinoless double beta decay constrains the neutrino mixing angles. Our formulation is widely valid and is applied to the neutrino oscillation experiment.
Double layer capacitors : automotive applications and modeling
New, David Allen, 1976-
2004-01-01T23:59:59.000Z
This thesis documents the work on the modeling of double layer capacitors (DLCs) and the validation of the modeling procedure. Several experiments were conducted to subject the device under test to a variety of ...
Formation of double-$?$ hypernuclei at PANDA
T. Gaitanos; A. B. Larionov; H. Lenske; U. Mosel
2012-01-17T23:59:59.000Z
We study the formation of single- and double-$\\Lambda$ hypernuclei in antiproton-induced reactions relevant for the forthcoming PANDA experiment at FAIR. We use the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model with relativistic mean-fields for the description of non-equilibrium dynamics and the statistical multifragmentation model (SMM) for fragment formation. This combined approach describes the dynamical properties of strangeness and fragments in low energy $\\bar{p}$-induced reactions fairly well. We then focus on the formation of double-$\\Lambda$ hypernuclei in high energy $\\bar{p}$-nucleus collisions on a primary target including the complementary $\\Xi$-induced reactions to a secondary one, as proposed by the PANDA collaboration. Our results show that a copious production of double-$\\Lambda$ hyperfragments is possible at PANDA. In particular, we provide first theoretical estimations on the double-$\\Lambda$ production cross section, which strongly rises with decreasing energy of the secondary $\\Xi$-beam.
Nonlinear optics via double dark resonances
Yelin, S. F.; Sautenkov, V. A.; Kash, M. M.; Welch, George R.; Lukin, M. D.
2003-01-01T23:59:59.000Z
Double dark resonances originate from a coherent perturbation of a system displaying electromagnetically induced transparency. We experimentally show and theoretically confirm that this leads to the possibility of extremely sharp resonances...
Double field theory of type II strings
Hohm, Olaf
We use double field theory to give a unified description of the low energy limits of type IIA and type IIB superstrings. The Ramond-Ramond potentials fit into spinor representations of the duality group O(D, D) and ...
Searches for neutrinoless double beta decay
B. Schwingenheuer
2012-01-24T23:59:59.000Z
Neutrinoless double beta decay is a lepton number violating process whose observation would also establish that neutrinos are their own anti-particles. There are many experimental efforts with a variety of techniques. Some (EXO, Kamland-Zen, GERDA phase I and CANDLES) started take data in 2011 and EXO has reported the first measurement of the half life for the double beta decay with two neutrinos of $^{136}$Xe. The sensitivities of the different proposals are reviewed.
Neutrinoless Double Beta Decay and CP Violation
Patrick J. O'Donnell; Utpal Sarkar
1993-05-27T23:59:59.000Z
We study the relation between the Majorana neutrino mass matrices and the neutrinoless double beta decay when CP is not conserved. We give an explicit form of the decay rate in terms of a rephasing invariant quantity and demonstrate that in the presence of CP violation it is impossible to have vanishing neutrinoless double beta decay in the case of two neutrino generations (or when the third generation leptons do not mix with other leptons and hence decouple).
Wavelength-doubling optical parametric oscillator
Armstrong, Darrell J. (Albuquerque, NM); Smith, Arlee V. (Albuquerque, NM)
2007-07-24T23:59:59.000Z
A wavelength-doubling optical parametric oscillator (OPO) comprising a type II nonlinear optical medium for generating a pair of degenerate waves at twice a pump wavelength and a plurality of mirrors for rotating the polarization of one wave by 90 degrees to produce a wavelength-doubled beam with an increased output energy by coupling both of the degenerate waves out of the OPO cavity through the same output coupler following polarization rotation of one of the degenerate waves.
Neutrinoless double beta decay with scalar bilinears
H. V. Klapdor-Kleingrothaus; U. Sarkar
2002-11-18T23:59:59.000Z
One possible probe to physics beyond the standard model is to look for scalar bilinears, which couple to two fermions of the standard model. We point out that the scalar bilinears allow new diagrams contributing to the neutrinoless double beta decay. The upper bound on the neutrinoless double beta decay lifetime would then give new constraints on the ratio of the masses of these scalars to their couplings to the fermions.
Radon monitoring and early low background counting at the Sanford Underground Laboratory
Thomas, K.J.
2012-01-01T23:59:59.000Z
Radon Monitoring and Early Low Background Counting at theCA 94720, USA Abstract. Radon detectors have been deployedin Lead, SD. Currently, no radon mitigation measures are in
Loops and Power Counting in the High Density Effective Field Theory
Thomas Schaefer
2003-10-15T23:59:59.000Z
We introduce the high density effective theory of QCD. We discuss, in particular, the problem of developing a consistent power counting scheme.
Boyer, Edmond
avoid it?) Nicole Muhlrad INRETS, UMRESTTE, Lyon, France nicole.muhlrad@inrets.fr `Wright's Law in anticipation of a final oil shortage. What we now know of global warming similarly leads to considering is that reducing the dependency on oil of the transport system by developing new forms of mobility through
Sensor integration for implementation of obstacle avoidance in an autonomous helicopter system
Mentzer, Christopher Isaac
2006-08-16T23:59:59.000Z
This thesis describes the development of the Texas A&M University Autonomous Helicopter System and the integration of obstacle avoidance capabilities into that system. The helicopter system, composed of a Bergen Observer helicopter and a Rotomotion...
Smith, Kyle A. (Kyle Alexander)
2013-01-01T23:59:59.000Z
The Traffic Alert and Collision Avoidance System (TCAS) is mandated worldwide to protect against aircraft mid-air collisions. One drawback of the current TCAS design is limited support for certain closely spaced parallel ...
Stay on marked paths to avoid poison ivy. Watch young children carefully around river and creeks.
Shyy, Wei
Caution · Stay on marked paths to avoid poison ivy. · Watch young children carefully around river or outdoor cooking are not permitted. Poison Ivy Hours · Trails and gardens open 8 am to dusk. · Conservatory
Hazard avoidance for high-speed rough-terrain unmanned ground vehicles
Spenko, Matthew J. (Matthew Julius), 1976-
2005-01-01T23:59:59.000Z
High-speed unmanned ground vehicles have important applications in rough-terrain. In these applications unexpected and dangerous situations can occur that require rapid hazard avoidance maneuvers. At high speeds, there is ...
Sensor integration for implementation of obstacle avoidance in an autonomous helicopter system
Mentzer, Christopher Isaac
2006-08-16T23:59:59.000Z
Autonomous Flight Control System (AFCS), was developed as a platform to support the development of the obstacle avoidance system through integration of sensors and onboard processing capabilities. The system has proven in various flight tests that it has...
Krings, Axel W.
Managing Secure Survivable Critical Infrastructures To Avoid Vulnerabilities Frederick Sheldon, Tom technologically complex society makes knowing the vulnerability of such systems essential to improving their intrinsic reliability/survivability. Our discussion employs the power transmission grid. 1 Introduction
Ortho-positronium observation in the Double Chooz Experiment
Y. Abe; J. C. dos Anjos; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; L. Bezrukov; E. Blucher; C. Buck; J. Busenitz; A. Cabrera; E. Caden; L. Camilleri; R. Carr; M. Cerrada; P. -J. Chang; E. Chauveau; P. Chimenti; A. P. Collin; E. Conover; J. M. Conrad; J. I. Crespo-Anadon; K. Crum; A. S. Cucoanes; E. Damon; J. V. Dawson; J. Dhooghe; D. Dietrich; Z. Djurcic; M. Dracos; M. Elnimr; A. Etenko; M. Fallot; F. von Feilitzsch; J. Felde; S. M. Fernandes; V. Fischer; D. Franco; M. Franke; H. Furuta; I. Gil-Botella; L. Giot; M. Goger-Neff; L. F. G. Gonzalez; L. Goodenough; M. C. Goodman; C. Grant; N. Haag; T. Hara; J. Haser; M. Hofmann; G. A. Horton-Smith; A. Hourlier; M. Ishitsuka; J. Jochum; C. Jollet; F. Kaether; L. N. Kalousis; Y. Kamyshkov; D. M. Kaplan; T. Kawasaki; E. Kemp; H. de Kerret; D. Kryn; M. Kuze; T. Lachenmaier; C. E. Lane; T. Lasserre; A. Letourneau; D. Lhuillier; H. P. Lima Jr; M. Lindner; J. M. Lopez-Castano; J. M. LoSecco; B. Lubsandorzhiev; S. Lucht; J. Maeda; C. Mariani; J. Maricic; J. Martino; T. Matsubara; G. Mention; A. Meregaglia; T. Miletic; R. Milincic; A. Minotti; Y. Nagasaka; Y. Nikitenko; P. Novella; L. Oberauer; M. Obolensky; A. Onillon; A. Osborn; C. Palomares; I. M. Pepe; S. Perasso; P. Pfahler; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Rohling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schonert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stuken; F. Suekane; S. Sukhotin; T. Sumiyoshi; Y. Sun; R. Svoboda; K. Terao; A. Tonazzo; H. H. Trinh Thi; G. Valdiviesso; N. Vassilopoulos; C. Veyssiere; M. Vivier; S. Wagner; N. Walsh; H. Watanabe; C. Wiebusch; L. Winslow; M. Wurm; G. Yang; F. Yermia; V. Zimmer
2014-10-07T23:59:59.000Z
The Double Chooz experiment measures the neutrino mixing angle $\\theta_{13}$ by detecting reactor $\\bar{\
Computer code for double beta decay QRPA based calculations
Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University
. The Enriched Xenon Observatory for neutrinoless double beta decay (EXO) will search for the rare decays
The avoidance of a previously neutral stimulus paired with frustrative nonreward
Beard, William Washington
1975-01-01T23:59:59.000Z
involved pairing of a CS (light) with frustra- tive nonreward in Goal Box 1. During Phase III, Ss were tested in a separate hurdle-jump apparatus to de- monstrate avoidance of the now aversive CS by jumping at the sound of a buzzer. It was found... Ss conditioned to the CS jumped the hurdle significantly faster than any of the other subgroups. However, an analysis of the frequency of avoidance re- sponses revealed no statistically significant differ- ences between all subgroups...
The effects of discriminatively different punishment on the extinction of an avoidance response
Young, Donald Ray
1972-01-01T23:59:59.000Z
THE EFFECTS OF DISCRIMINATIVELY DIFFERENT PUNISHMENT ON THE EXTINCTION OF AN AVOIDANCE RESPONSE A Thesis by DONALD RAY YOUNG Submitted to the Graduate College of Texas AGM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1972 Major Subject: Psychology THE EFFECTS OF DISCRIMINATIVELY DIFFERENT PUNISHMENT ON THE EXTINCTION OF AN AVOIDANCE RESPONSE A Thesis by DONALD RAY YOUNG Approved as to style and content by: (Chairman of Committee...
Caustics, counting maps and semi-classical asymptotics
N. M. Ercolani
2010-04-12T23:59:59.000Z
This paper develops a deeper understanding of the structure and combinatorial significance of the partition function for Hermitian random matrices. The coefficients of the large N expansion of the logarithm of this partition function,also known as the genus expansion, (and its derivatives) are generating functions for a variety of graphical enumeration problems. The main results are to prove that these generating functions are in fact specific rational functions of a distinguished irrational (algebraic) function of the generating function parameters. This distinguished function is itself the generating function for the Catalan numbers (or generalized Catalan numbers, depending on the choice of parameter). It is also a solution of the inviscid Burgers equation for certain initial data. The shock formation, or caustic, of the Burgers characteristic solution is directly related to the poles of the rational forms of the generating functions. These results in turn provide new information about the asymptotics of recurrence coefficients for orthogonal polynomials with respect to exponential weights. One gains new insights into the relation between certain derivatives of the genus expansion and the asymptotic expansion of the first Painleve transcendent, related to the double-scaling limit. This work provides a precise expression of the Painleve asymptotic coefficients directly in terms of the coefficients of the partial fractions expansion of the rational form of the generating functions established here. Moreover, these insights point toward a more general program relating the first Painleve hierarchy and the higher order structure of the double-scaling limit to the specific rational structure of generating functions.
Aalseth, Craig E.; Day, Anthony R.; Fuller, Erin S.; Hoppe, Eric W.; Keillor, Martin E.; Mace, Emily K.; Myers, A. W.; Overman, Cory T.; Panisko, Mark E.; Seifert, Allen; Warren, Glen A.; Williams, Richard M.
2013-05-01T23:59:59.000Z
Abstract A new ultra-low-background proportional counter (ULBPC) design was recently developed at Pacific Northwest National Laboratory (PNNL). This design, along with an ultra-low-background counting system (ULBCS) which provides passive and active shielding with radon exclusion, has been developed to complement a new shallow underground laboratory (~30 meters water-equivalent) constructed at PNNL. After these steps to mitigate dominant backgrounds (cosmic rays, external gamma-rays, radioactivity in materials), remaining background events do not exclusively arise from ionization of the proportional counter gas. Digital pulse-shape discrimination (PSD) is thus employed to further improve measurement sensitivity. In this work, a template shape is generated for each individual sample measurement of interest, a "self-calibrating" template. Differences in event topology can also cause differences in pulse shape. In this work, the temporal region analyzed for each event is refined to maximize background discrimination while avoiding unwanted sensitivity to event topology. This digital PSD method is applied to sample and background data, and initial measurement results from a biofuel methane sample are presented in the context of low-background measurements currently being developed.
New physics effects on neutrinoless double beta decay from right-handed current
Shao-Feng Ge; Manfred Lindner; Sudhanwa Patra
2015-08-28T23:59:59.000Z
We study the impact of new physics contributions to neutrinoless double beta decay arising from right-handed current in comparison with the standard mechanism. If the light neutrinos obtain their masses from Type-II seesaw within left-right symmetric model, where the Type-I contribution is suppressed to negligible extent, the right-handed PMNS matrix is the same as its left-handed counterpart, making it highly predictable and can be tested at next-generation experiments. It is very attractive, especially with recent cosmological constraint favoring the normal hierarchy under which the neutrinoless double beta decay is too small to be observed unless new physics appears as indicated by the recent diboson excess observed at ATLAS. The relative contributions from left- and right-handed currents can be reconstructed with the ratio between lifetimes of two different isotopes as well as the ratio of nuclear matrix elements. In this way, the theoretical uncertainties in the calculation of nuclear matrix elements can be essentially avoided. We also discuss the interplay of neutrinoless double beta decay measurements with cosmology, beta decay, and neutrino oscillation.
Canonical linearized Regge Calculus: counting lattice gravitons with Pachner moves
Philipp A. Hoehn
2014-11-24T23:59:59.000Z
We afford a systematic and comprehensive account of the canonical dynamics of 4D Regge Calculus perturbatively expanded to linear order around a flat background. To this end, we consider the Pachner moves which generate the most basic and general simplicial evolution scheme. The linearized regime features a vertex displacement (`diffeomorphism') symmetry for which we derive an abelian constraint algebra. This permits to identify gauge invariant `lattice gravitons' as propagating curvature degrees of freedom. The Pachner moves admit a simple method to explicitly count the gauge and `graviton' degrees of freedom on an evolving triangulated hypersurface and we clarify the distinct role of each move in the dynamics. It is shown that the 1-4 move generates four `lapse and shift' variables and four conjugate vertex displacement generators; the 2-3 move generates a `graviton'; the 3-2 move removes one `graviton' and produces the only non-trivial equation of motion; and the 4-1 move removes four `lapse and shift' variables and trivializes the four conjugate symmetry generators. It is further shown that the Pachner moves preserve the vertex displacement generators. These results may provide new impetus for exploring `graviton dynamics' in discrete quantum gravity models.
AACR Cancer Progress Report 2012 Making Research Count for Patients: A New Day
Sherman, S. Murray
AACR Cancer Progress Report 2012 Making Research Count for Patients: A New Day www.cancerprogressreport.org · www.aacr.org #12;AACR Cancer Progress Report 2012 Making Research Count for Patients: A New Day www.cancerprogressreport.org · www.aacr.org Also published as: American Association for Cancer Research. AACR cancer progress report
Identification of Local Clusters for Count Data: A Model-Based Moran's I Test
Zhang, Tonglin
in detecting local clusters by local association terms with an acceptable type I error probability. When usedIdentification of Local Clusters for Count Data: A Model-Based Moran's I Test Tonglin Zhang and Ge@wvu.edu 0 #12;Identification of Local Clusters for Count Data: A Model-Based Moran's I Test Abstract We set
Plunkett, Count George Noble by D. R. O'Connor Lysaght
Plunkett, Count George Noble by D. R. O'Connor Lysaght Plunkett, Count George Noble (1851 to the nursing order of the Little Company of Mary (Blue Sisters), and on 4 April 1884 Pope Leo XIII made him's republic rather than to the `king, lords and commons' of Arthur Griffith (qv). Plunkett and Griffith became
TTDTTi'^'/O^ Riso-R-490 Total-Count Calibration Blocks
I et · ·Ji 2 TTDTTi'^'/O^ Riso-R-490 Total-Count Calibration Blocks for Use in Uranium Exploration-COUNT CALIBRATION BLOCKS FOR USE IN URANIUM EXPLORATION L. Løvborg Abstract. Transportable calibration blocks; CALIBRATION? CALIBRATION STANDARDS? CONCRETES; EXPLORATION; SCINTILLATION COUNTERS; URANIUM UDC 539
WHERE ARE THE ELECTRIC VEHICLES?1 A SPATIAL MODEL FOR VEHICLE-CHOICE COUNT DATA2
Kockelman, Kara M.
1 WHERE ARE THE ELECTRIC VEHICLES?1 A SPATIAL MODEL FOR VEHICLE-CHOICE COUNT DATA2 3 T. Donna Chen4 ABSTRACT29 30 Electric vehicles (EVs) are predicted to increase in market share as auto manufacturers: Electric vehicles, spatial count modeling, vehicle choice, vehicle ownership,1 consumer behavior
Multi-commodity flow estimation with partial counts on selected links
Kang, Dong Hun
2007-04-25T23:59:59.000Z
of highway links. Due to the restriction of time and cost, traffic counts are not always observed for every highway link. Typically, about 50% of the links have traffic counts in urban highway networks. Also, it should be noted that the observed traffic...
Robust Estimation and Outlier Detection for Overdispersed Multinomial Models of Count Data
Sekhon, Jasjeet S.
Robust Estimation and Outlier Detection for Overdispersed Multinomial Models of Count Data Walter R research on labor rela- tions (Card 1990), the relationship between patents and R&D (Hausman, Hall counts in political science includes studies of child care services (Bratton and Ray 2002), gender
The search for neutrinoless double beta decay
J. J. Gomez-Cadenas; J. Martin-Albo; M. Mezzetto; F. Monrabal; M. Sorel
2012-01-16T23:59:59.000Z
In the last two decades the search for neutrinoless double beta decay has evolved into one of the highest priorities for understanding neutrinos and the origin of mass. The main reason for this paradigm shift has been the discovery of neutrino oscillations, which clearly established the existence of massive neutrinos. An additional motivation for conducting such searches comes from the existence of an unconfirmed, but not refuted, claim of evidence for neutrinoless double decay in $^{76}\\text{Ge}$. As a consequence, a new generation of experiments, employing different detection techniques and $\\beta\\beta$ isotopes, is being actively promoted by experimental groups across the world. In addition, nuclear theorists are making remarkable progress in the calculation of the neutrinoless double beta decay nuclear matrix elements, thus eliminating a substantial part of the theoretical uncertainties affecting the particle physics interpretation of this process. In this report, we review the main aspects of the double beta decay process and some of the most relevant experiments. The picture that emerges is one where searching for neutrinoless double beta decay is recognized to have both far-reaching theoretical implications and promising prospects for experimental observation in the near future.
U. S. rig count drops below 600, a post-1940 low
Not Available
1992-06-22T23:59:59.000Z
This paper reports that the Baker Hughes Inc. count of active U.S. rotary rigs as of June 12 fell to less than 600 the first time since that tally began in 1940. The previous modern record low was set at 610 the previous week. Baker Hughes reported about 1,400 rigs idle in the U.S. last week. Using a different criteria, the Smith International count of U.S. active rigs fell seven units to 653 the week ended June 12, compared with a count of 910 the previous year. Baker Hughes predecessor Hughes Tool Co. began keeping monthly records of active U.S. rigs in January 1940. The lowest monthly count that year was 857. It changed to a weekly count in January 1949. The milestone was met wit calls for relief for the U.S. upstream sector from industry and government officials in Washington.
Dark counts of superconducting nanowire single-photon detector under illumination
Chen, Sijing; Zhang, Weijun; Yang, Xiaoyan; Li, Hao; Zhang, Lu; Wang, Zhen; Xie, Xiaoming
2015-01-01T23:59:59.000Z
An abnormal increase in the SDE was observed for superconducting nanowire single-photon detectors (SNSPDs) when the bias current (Ib) was close to the switching current (Isw). By introducing the time-correlated single-photon counting technique, we investigated the temporal histogram of the detection counts of an SNSPD under illumination. The temporal information helps us to distinguish photon counts from dark counts in the time domain. In this manner, the dark count rate (DCR) under illumination and the accurate SDE can be determined. The DCR under moderate illumination may be significantly larger than the conventional DCR measured without illumination under a high Ib, which causes the abnormal increase in the SDE. The increased DCR may be explained by the suppression of Isw under illumination.
Phenomenology of neutrinoless double beta decay
M. Hirsch
2006-09-15T23:59:59.000Z
Neutrinoless double beta decay violates lepton number by two units, a positive observation therefore necessarily implies physics beyond the standard model. Here, three possible contributions to neutrinoless double beta decay are briefly reviewed: (a) The mass mechanism and its connection to neutrino oscillations; (b) Left-right symmetric models and the lower limit on the right-handed W boson mass; and (c) R-parity violating supersymmetry. In addition, the recently published ``extended black box'' theorem is briefly discussed. Combined with data from oscillation experiments this theorem provides proof that the neutrinoless double beta decay amplitude must receive a non-zero contribution from the mass mechanism, if neutrinos are indeed Majorana particles.
Recent Results in Neutrinoless Double Beta Decay
Lisa J. Kaufman
2013-05-14T23:59:59.000Z
The search for neutrinoless double beta decay is a rich source for new physics. The observation of this decay will lead to understanding of the absolute mass scale of neutrinos, the Majorana nature of the neutrino (whether the neutrino is its own anti-particle), and lepton number violation. Double beta decay is being investigated around the world by several experiments using different candidate isotopes. There has been much progress made in experimental techniques recently such that achieving sensitivity to neutrino masses at 50 meV and below will be possible in the near future. A summary of recent results in neutrinoless double beta decay is discussed with a look toward the experimental goals for the future.
Precision Muon Reconstruction in Double Chooz
Double Chooz collaboration; Y. Abe; J. C. dos Anjos; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; L. Bezrukov; E. Blucher; C. Buck; J. Busenitz; A. Cabrera; E. Caden; L. Camilleri; R. Carr; M. Cerrada; P. -J. Chang; E. Chauveau; P. Chimenti; A. P. Collin; E. Conover; J. M. Conrad; J. I. Crespo-Anadón; K. Crum; A. Cucoanes; E. Damon; J. V. Dawson; D. Dietrich; Z. Djurcic; M. Dracos; M. Elnimr; A. Etenko; M. Fallot; F. von Feilitzsch; J. Felde; S. M. Fernandes; V. Fischer; D. Franco; M. Franke; H. Furuta; I. Gil-Botella; L. Giot; M. Göger-Neff; L. F. G. Gonzalez; L. Goodenough; M. C. Goodman; C. Grant; N. Haag; T. Hara; J. Haser; M. Hofmann; G. A. Horton-Smith; A. Hourlier; M. Ishitsuka; J. Jochum; C. Jollet; F. Kaether; L. N. Kalousis; Y. Kamyshkov; D. M. Kaplan; T. Kawasaki; E. Kemp; H. de Kerret; D. Kryn; M. Kuze; T. Lachenmaier; C. E. Lane; T. Lasserre; A. Letourneau; D. Lhuillier; H. P. Lima Jr; M. Lindner; J. M. López-Casta no; J. M. LoSecco; B. Lubsandorzhiev; S. Lucht; J. Maeda; C. Mariani; J. Maricic; J. Martino; T. Matsubara; G. Mention; A. Meregaglia; T. Miletic; R. Milincic; A. Minotti; Y. Nagasaka; Y. Nikitenko; P. Novella; M. Obolensky; L. Oberauer; A. Onillon; A. Osborn; C. Palomares; I. M. Pepe; S. Perasso; P. Pfahler; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stüken; F. Suekane; S. Sukhotin; T. Sumiyoshi; Y. Sun; R. Svoboda; K. Terao; A. Tonazzo; H. H. Trinh Thi; G. Valdiviesso; N. Vassilopoulos; C. Veyssiere; M. Vivier; S. Wagner; H. Watanabe; C. Wiebusch; L. Winslow; M. Wurm; G. Yang; F. Yermia; V. Zimmer
2014-08-15T23:59:59.000Z
We describe a muon track reconstruction algorithm for the reactor anti-neutrino experiment Double Chooz. The Double Chooz detector consists of two optically isolated volumes of liquid scintillator viewed by PMTs, and an Outer Veto above these made of crossed scintillator strips. Muons are reconstructed by their Outer Veto hit positions along with timing information from the other two detector volumes. All muons are fit under the hypothesis that they are through-going and ultrarelativistic. If the energy depositions suggest that the muon may have stopped, the reconstruction fits also for this hypothesis and chooses between the two via the relative goodness-of-fit. In the ideal case of a through-going muon intersecting the center of the detector, the resolution is ~40 mm in each transverse dimension. High quality muon reconstruction is an important tool for reducing the impact of the cosmogenic isotope background in Double Chooz.
Status of the CUORE and results from the CUORE-0 neutrinoless double beta decay experiments
Sisti, M; Avignone, F T; Azzolini, O; Balata, M; Banks, T I; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Brofferio, C; Bucci, C; Cai, X Z; Camacho, A; Caminata, A; Canonica, L; Cao, X G; Capelli, S; Cappelli, L; Carbone, L; Cardani, L; Casali, N; Cassina, L; Chiesa, D; Chott, N; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, R J; Cushman, J S; Dafinei, I; Dally, A; Datskov, V; Dell'Oro, S; Deninno, M; Di Domizio, S; di Vacri, M L; Drobizhev, A; Ejzak, L; Fang, D Q; Farach, H A; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Fujikawa, B K; Giachero, A; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Gutierrez, T D; Haller, E E; Han, K; Heeger, K M; Hennings-Yeomans, R; Hickerson, K P; Huang, H Z; Kadel, R; Keppel, G; Kolomensky, Yu G; Li, Y L; Ligi, C; Lim, K E; Liu, X; Ma, Y G; Maiano, C; Maino, M; Martinez, M; Maruyama, R H; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nastasi, M; Nisi, S; Nones, C; Norman, E B; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, J L; Pagliarone, C E; Pallavicini, M; Palmieri, V; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Pettinacci, V; Piperno, G; Pira, C; Pirro, S; Pozzi, S; Previtali, E; Rosenfeld, C; Rusconi, C; Sala, E; Sangiorgio, S; Scielzo, N D; Smith, A R; Taffarello, L; Tenconi, M; Terranova, F; Tian, W D; Tomei, C; Trentalange, S; Ventura, G; Vignati, M; Wang, B S; Wang, H W; Wielgus, L; Wilson, J; Winslow, L A; Wise, T; Woodcraft, A; Zanotti, L; Zarra, C; Zhang, G Q; Zhu, B X; Zucchelli, S
2015-01-01T23:59:59.000Z
CUORE is a 741 kg array of TeO2 bolometers for the search of neutrinoless double beta decay of 130Te. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/keV/kg/y will be reached, in five years of data taking CUORE will have a 1 sigma half life sensitivity of 10E26 y. CUORE-0 is a smaller experiment constructed to test and demonstrate the performances expected for CUORE. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.
Status of the CUORE and results from the CUORE-0 neutrinoless double beta decay experiments
CUORE Collaboration; M. Sisti; D. R. Artusa; F. T. Avignone III; O. Azzolini; M. Balata; T. I. Banks; G. Bari; J. Beeman; F. Bellini; A. Bersani; M. Biassoni; C. Brofferio; C. Bucci; X. Z. Cai; A. Camacho; A. Caminata; L. Canonica; X. G. Cao; S. Capelli; L. Cappelli; L. Carbone; L. Cardani; N. Casali; L. Cassina; D. Chiesa; N. Chott; M. Clemenza; S. Copello; C. Cosmelli; O. Cremonesi; R. J. Creswick; J. S. Cushman; I. Dafinei; A. Dally; V. Datskov; S. Dell'Oro; M. Deninno; S. Di Domizio; M. L. di Vacri; A. Drobizhev; L. Ejzak; D. Q. Fang; H. A. Farach; M. Faverzani; G. Fernandes; E. Ferri; F. Ferroni; E. Fiorini; M. A. Franceschi; S. J. Freedman; B. K. Fujikawa; A. Giachero; L. Gironi; A. Giuliani; P. Gorla; C. Gotti; T. D. Gutierrez; E. E. Haller; K. Han; K. M. Heeger; R. Hennings-Yeomans; K. P. Hickerson; H. Z. Huang; R. Kadel; G. Keppel; Yu. G. Kolomensky; Y. L. Li; C. Ligi; K. E. Lim; X. Liu; Y. G. Ma; C. Maiano; M. Maino; M. Martinez; R. H. Maruyama; Y. Mei; N. Moggi; S. Morganti; T. Napolitano; M. Nastasi; S. Nisi; C. Nones; E. B. Norman; A. Nucciotti; T. O'Donnell; F. Orio; D. Orlandi; J. L. Ouellet; C. E. Pagliarone; M. Pallavicini; V. Palmieri; L. Pattavina; M. Pavan; M. Pedretti; G. Pessina; V. Pettinacci; G. Piperno; C. Pira; S. Pirro; S. Pozzi; E. Previtali; C. Rosenfeld; C. Rusconi; E. Sala; S. Sangiorgio; N. D. Scielzo; A. R. Smith; L. Taffarello; M. Tenconi; F. Terranova; W. D. Tian; C. Tomei; S. Trentalange; G. Ventura; M. Vignati; B. S. Wang; H. W. Wang; L. Wielgus; J. Wilson; L. A. Winslow; T. Wise; A. Woodcraft; L. Zanotti; C. Zarra; G. Q. Zhang; B. X. Zhu; S. Zucchelli
2015-02-12T23:59:59.000Z
CUORE is a 741 kg array of TeO2 bolometers for the search of neutrinoless double beta decay of 130Te. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/keV/kg/y will be reached, in five years of data taking CUORE will have a 1 sigma half life sensitivity of 10E26 y. CUORE-0 is a smaller experiment constructed to test and demonstrate the performances expected for CUORE. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.
Energy conservation, counting statistics, and return to equilibrium
Vojkan Jaksic; Jane Panangaden; Annalisa Panati; Claude-Alain Pillet
2014-09-30T23:59:59.000Z
We study a microscopic Hamiltonian model describing an N-level quantum system S coupled to an infinitely extended thermal reservoir R. Initially, the system S is in an arbitrary state while the reservoir is in thermal equilibrium at temperature T. Assuming that the coupled system S+R is mixing with respect to the joint thermal equilibrium state, we study the Full Counting Statistics (FCS) of the energy transfers S->R and R->S in the process of return to equilibrium. The first FCS describes the increase of the energy of the system S. It is an atomic probability measure, denoted $P_{S,\\lambda,t}$, concentrated on the set of energy differences $\\sigma(H_S)-\\sigma(H_S)$ ($\\sigma(H_S)$ is the spectrum of the Hamiltonian of S, $t$ is the length of the time interval during which the measurement of the energy transfer is performed, and $\\lambda$ is the strength of the interaction between S and R). The second FCS, $P_{R,\\lambda,t}$, describes the decrease of the energy of the reservoir R and is typically a continuous probability measure whose support is the whole real line. We study the large time limit $t\\rightarrow\\infty$ of these two measures followed by the weak coupling limit $\\lambda\\rightarrow 0$ and prove that the limiting measures coincide. This result strengthens the first law of thermodynamics for open quantum systems. The proofs are based on modular theory of operator algebras and on a representation of $P_{R,\\lambda,t}$ by quantum transfer operators.
The double-beta decay: Theoretical challenges
Horoi, Mihai [Department of Physics, Central Michigan University, Mount Pleasant, Michigan, 48859 (United States)
2012-11-20T23:59:59.000Z
Neutrinoless double beta decay is a unique process that could reveal physics beyond the Standard Model of particle physics namely, if observed, it would prove that neutrinos are Majorana particles. In addition, it could provide information regarding the neutrino masses and their hierarchy, provided that reliable nuclear matrix elements can be obtained. The two neutrino double beta decay is an associate process that is allowed by the Standard Model, and it was observed for about ten nuclei. The present contribution gives a brief review of the theoretical challenges associated with these two process, emphasizing the reliable calculation of the associated nuclear matrix elements.
Indubala I Satija; Philip Naudus; Radha Balakrishnan; Jeffrey Heward; Mark Edwards; and Charles W Clark
2008-11-12T23:59:59.000Z
We study the coherent nonlinear tunneling dynamics of a binary mixture of Bose-Einstein condensates in a double-well potential. We demonstrate the existence of a new type of mode associated with the "swapping" of the two species in the two wells of the potential. In contrast to the symmetry breaking macroscopic quantum self-trapping (MQST) solutions, the swapping modes correspond to the tunneling dynamics that preserves the symmetry of the double well potential. As a consequence of two distinct types of broken symmetry MQST phases where the two species localize in the different potential welils or coexist in the same well, the corresponding symmetry restoring swapping modes result in dynamics where the the two species either avoid or chase each other. In view of the possibility to control the interaction between the species, the binary mixture offers a very robust system to observe these novel effects as well as the phenomena of Josephson oscillations and pi-modes
Satija, Indubala I; Balakrishnan, Radha; Heward, Jeffrey; Edwards, Mark; Clark, Charles W
2008-01-01T23:59:59.000Z
We study the coherent nonlinear tunneling dynamics of a binary mixture of Bose-Einstein condensates in a double-well potential. We demonstrate the existence of a new type of mode associated with the "swapping" of the two species in the two wells of the potential. In contrast to the symmetry breaking macroscopic quantum self-trapping (MQST) solutions, the swapping modes correspond to the tunneling dynamics that preserves the symmetry of the double well potential. As a consequence of two distinct types of broken symmetry MQST phases where the two species localize in the different potential welils or coexist in the same well, the corresponding symmetry restoring swapping modes result in dynamics where the the two species either avoid or chase each other. In view of the possibility to control the interaction between the species, the binary mixture offers a very robust system to observe these novel effects as well as the phenomena of Josephson oscillations and pi-modes
S. C. Ellis; J. Bland-Hawthorn
2007-03-06T23:59:59.000Z
We provide a consistent framework for estimating galaxy counts and variances in wide-field images for a range of photometric bands. The variances include both Poissonian noise and variations due to large scale structure. We demonstrate that our statistical theory is consistent with the counts in the deepest multiband surveys available. The statistical estimates depend on several observational parameters (e.g. seeing, signal to noise ratio), and include a sophisticated treatment of detection completeness. The JAVA calculator is freely available and offers the user the option to adopt our consistent framework or a different scheme. We also provide a summary table of statistical measures in the different bands for a range of different fields of view. Reliable estimation of the background counts has profound consequences in many areas of observational astronomy. We provide two such examples. One is from a recent study of the Sculptor galaxy NGC 300 where stellar photometry has been used to demonstrate that the outer disc extends to 10 effective radii, far beyond what was thought possible for a normal low-luminosity spiral. We confirm this finding by a reanalysis of the background counts. Secondly, we determine the luminosity function of the galaxy cluster Abell 2734, both through spectroscopically determined cluster membership, and through statistical subtraction of the background galaxies using the calculator and offset fields. We demonstrate very good agreement, suggesting that expensive spectroscopic follow-up, or off-source observations, may often be bypassed via determination of the galaxy background with GalaxyCount.
Hawley, Patrick, 1964-
2003-01-01T23:59:59.000Z
I evaluate three replies to skepticism, drawing conclusions about the meaning of "justified", the viability of foundationalism, the value of knowledge, and the role of belief in rational action. In the first chapter, I ...
Kline, Erik A.
2012-01-01T23:59:59.000Z
Security Information . . . . . . . . . . . . . . . . .Security Information . . . . . . . . . . . . . . . . . . . . .there is too much information about security properties in
ADE Double Scaled Little String Theories, Mock Modular Forms and Umbral Moonshine
Jeffrey A. Harvey; Sameer Murthy; Caner Nazaroglu
2014-10-22T23:59:59.000Z
We consider double scaled little string theory on $K3$. These theories are labelled by a positive integer $k \\ge 2$ and an $ADE$ root lattice with Coxeter number $k$. We count BPS fundamental string states in the holographic dual of this theory using the superconformal field theory $K3 \\times \\left( \\frac{SL(2,\\mathbb{R})_k}{U(1)} \\times \\frac{SU(2)_k}{U(1)} \\right) \\big/ \\mathbb{Z}_k$. We show that the BPS fundamental string states that are counted by the second helicity supertrace of this theory give rise to weight two mixed mock modular forms. We compute the helicity supertraces using two separate techniques: a path integral analysis that leads to a modular invariant but non-holomorphic answer, and a Hamiltonian analysis of the contribution from discrete states which leads to a holomorphic but not modular invariant answer. From a mathematical point of view the Hamiltonian analysis leads to a mixed mock modular form while the path integral gives the completion of this mixed mock modular form. We also compare these weight two mixed mock modular forms to those that appear in instances of Umbral Moonshine labelled by Niemeier root lattices $X$ that are powers of $ADE$ root lattices and find that they are equal up to a constant factor that we determine. In the course of the analysis we encounter an interesting generalization of Appell-Lerch sums and generalizations of the Riemann relations of Jacobi theta functions that they obey.
Compiler Generation and Autotuning of Communication-Avoiding Operators for Geometric
transformations to derive an implementation comparable to manually-tuned code. To make the approach portable-point computation is dwarfed by the overhead of data movement, making managing the memory hierarchy and cross rather than parallel specification. As modern architectures continue to grow in core count and exhibit
Impact of post-event avoidance behavior on commercial facilities sector venues-literature review.
Samsa, M. E.; Baldwin, T. E.; Berry, M. S.; Guzowski, L. B.; Martinez-Moyano, I.; Nieves, A. L.; Ramarasad, A. (Decision and Information Sciences)
2011-03-24T23:59:59.000Z
The terrorist attacks of September 11, 2001 (9/11), focused a great deal of interest and concern on how individual and social perceptions of risk change behavior and subsequently affect commercial sector venues. Argonne conducted a review of the literature to identify studies that quantify the direct and indirect economic consequences of avoidance behaviors that result from terrorist attacks. Despite a growing amount of literature addressing terrorism impacts, relatively little is known about the causal relationships between risk perception, human avoidance behaviors, and the economic effects on commercial venues. Nevertheless, the technical and academic literature does provide some evidence, both directly and by inference, of the level and duration of post-event avoidance behaviors on commercial venues. Key findings are summarized in this Executive Summary. Also included as an appendix is a more detailed summary table of literature findings reproduced from the full report.
Computational investigations of folded self-avoiding walks related to protein folding
Bahi, Jacques M; Mazouzi, Kamel; Philippe, Laurent
2013-01-01T23:59:59.000Z
Various subsets of self-avoiding walks naturally appear when investigating existing methods designed to predict the 3D conformation of a protein of interest. Two such subsets, namely the folded and the unfoldable self-avoiding walks, are studied computationally in this article. We show that these two sets are equal and correspond to the whole $n$-step self-avoiding walks for $n\\leqslant 14$, but that they are different for numerous $n \\geqslant 108$, which are common protein lengths. Concrete counterexamples are provided and the computational methods used to discover them are completely detailed. A tool for studying these subsets of walks related to both pivot moves and proteins conformations is finally presented.
Neutrinoless double beta decay in seesaw models
Mattias Blennow; Enrique Fernandez-Martinez; Jacobo Lopez-Pavon; Javier Menendez
2014-05-12T23:59:59.000Z
We study the general phenomenology of neutrinoless double beta decay in seesaw models. In particular, we focus on the dependence of the neutrinoless double beta decay rate on the mass of the extra states introduced to account for the Majorana masses of light neutrinos. For this purpose, we compute the nuclear matrix elements as functions of the mass of the mediating fermions and estimate the associated uncertainties. We then discuss what can be inferred on the seesaw model parameters in the different mass regimes and clarify how the contribution of the light neutrinos should always be taken into account when deriving bounds on the extra parameters. Conversely, the extra states can also have a significant impact, cancelling the Standard Model neutrino contribution for masses lighter than the nuclear scale and leading to vanishing neutrinoless double beta decay amplitudes even if neutrinos are Majorana particles. We also discuss how seesaw models could reconcile large rates of neutrinoless double beta decay with more stringent cosmological bounds on neutrino masses.
Scale evolution of double parton correlations
Tomas Kasemets
2014-11-17T23:59:59.000Z
We review the effect of scale evolution on a number of different correlations in double parton scattering (DPS). The strength of the correlations generally decreases with the scale but at a rate which greatly varies between different types. Through studies of the evolution, an understanding of which correlations can be of experimental relevance in different processes and kinematical regions is obtained.
Double tracks test site characterization report
NONE
1996-05-01T23:59:59.000Z
This report presents the results of site characterization activities performed at the Double Tracks Test Site, located on Range 71 North, of the Nellis Air Force Range (NAFR) in southern Nevada. Site characterization activities included reviewing historical data from the Double Tracks experiment, previous site investigation efforts, and recent site characterization data. The most recent site characterization activities were conducted in support of an interim corrective action to remediate the Double Tracks Test Site to an acceptable risk to human health and the environment. Site characterization was performed using a phased approach. First, previously collected data and historical records sere compiled and reviewed. Generalized scopes of work were then prepared to fill known data gaps. Field activities were conducted and the collected data were then reviewed to determine whether data gaps were filled and whether other areas needed to be investigated. Additional field efforts were then conducted, as required, to adequately characterize the site. Characterization of the Double Tracks Test Site was conducted in accordance with the US Department of Energy`s (DOE) Streamlined Approach for Environmental Restoration (SAFER).
Cretan Hieroglyphic Wool Units (LANA, double mina)
Younger, John G.
2005-01-01T23:59:59.000Z
Minoan Hieroglyphic document CHIC *089, on analogy with Linear A and B wool documents, records the wool of a certain type of cloth as the equivalent in weight of 3 double minas, that is 1 wool unit (or the wool from 4 sheep).
Double Tracks revegetation and monitoring plan
NONE
1997-07-01T23:59:59.000Z
This document is a reclamation plan for short-term and long-term stabilization of land disturbed by activities associated with interim clean-up of radionuclide-contaminated surface soil at the Double Tracks site. This document has been prepared to provide general reclamation practices and procedures that will be followed during restoration of the cleanup site. Reclamation demonstration plots were established near the site in the fall of 1994 to evaluate the performance of several native species and to evaluate different irrigation strategies. Results of the study at Double Tracks, as well as the results from numerous studies conducted at other sites (Area 11 and Area 19 of the Nevada Test Site), have been summarized and incorporated into this final reclamation plan for the interim cleanup of the Double Tracks site, located northwest of the Nevada Test Site on the Nellis Air Force Range. Surface soils at Double Tracks were contaminated as a result of the detonation of a device containing plutonium and depleted uranium using chemical explosives. The total amount of Pu deposited on the site was between 980 and 1,600 grams and was scattered downwind south of the detonation site. Short-term stabilization consists of the application of a chemical soil stabilizer that is applied immediately following excavation of the contaminated soils to minimize Pu resuspension. Long-term stabilization is accomplished by the establishment of a permanent vegetation.
Neutrino oscillations and neutrinoless double beta decay
D. Falcone; F. Tramontano
2001-03-16T23:59:59.000Z
The relation between neutrino oscillation parameters and neutrinoless double beta decay is studied, assuming normal and inverse hierarchies for Majorana neutrino masses. For normal hierarchy the crucial dependence on U_{e3} is explored. The link with tritium beta decay is also briefly discussed.
Sutherland, H.J.; Schluter, L.L.
1990-01-01T23:59:59.000Z
A rainflow counting algorithm'' has been incorporated into the LIFE2 fatigue/fracture analysis code for wind turbines. The count algorithm, with its associated pre- and post-count algorithms, permits the code to incorporate time-series data into its analysis scheme. After a description of the algorithms used here, their use is illustrated by the examination of stress-time histories from the Sandia 34-m Test Bed vertical axis wind turbine. The results of the rainflow analysis are compared and contrasted to previously reported predictions for the service lifetime of the fatigue critical component for this turbine. 14 refs., 8 figs., 3 tabs.
Entanglement, avoided crossings, and quantum chaos in an Ising model with a tilted magnetic field
Karthik, J.; Sharma, Auditya; Lakshminarayan, Arul [Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India)
2007-02-15T23:59:59.000Z
We study a one-dimensional Ising model with a magnetic field and show that tilting the field induces a transition to quantum chaos. We explore the stationary states of this Hamiltonian to show the intimate connection between entanglement and avoided crossings. In general, entanglement gets exchanged between the states undergoing an avoided crossing with an overall enhancement of multipartite entanglement at the closest point of approach, simultaneously accompanied by diminishing two-body entanglement as measured by concurrence. We find that both for stationary as well as nonstationary states, nonintegrability leads to a destruction of two-body correlations and distributes entanglement more globally.
Harrison, K G; Holt, P D; Wylie, J W
1977-01-01T23:59:59.000Z
The spark counting of etched fission-fragment tracks in polycarbonate for a personal neutron dosimetry system
American Society for Testing and Materials. Philadelphia
2010-01-01T23:59:59.000Z
Standard test method for nondestructive assay of plutonium in scrap and waste by passive neutron coincidence counting
A DIRECT-DEMAND MODEL FOR BICYCLE COUNTS:1 THE IMPACTS OF LEVEL OF SERVICE AND OTHER FACTORS2
Kockelman, Kara M.
1 A DIRECT-DEMAND MODEL FOR BICYCLE COUNTS:1 THE IMPACTS OF LEVEL OF SERVICE AND OTHER FACTORS2 3 Keywords: Transportation Planning, Bicycle, Cycling, Bike Lanes, Traffic Counts, Level of23 Service24 25 alone. Unfortunately, most municipalities do not conduct31 comprehensive bicycle counts to determine
The Majorana Demonstrator: A search for neutrinoless double-beta decay of germanium-76
Elliott, S. R.; Boswell, M.; Goett, J.; Rielage, K.; Ronquest, M. C.; Xu, W. [Los Alamos National Laboratory, Los Alamos, NM (United States); Abgrall, N.; Chan, Y-D.; Hegai, A.; Martin, R. D.; Mertens, S.; Poon, A. W. P. [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States); Aguayo, E.; Fast, J. E.; Hoppe, E. W.; Kouzes, R. T.; LaFerriere, B. D.; Orrell, J. L.; Overman, N. R.; Soin, A. [Pacific Northwest National Laboratory, Richland, WA (United States); and others
2013-12-30T23:59:59.000Z
The MAJORANA collaboration is searching for neutrinoless double beta decay using {sup 76}Ge, which has been shown to have a number of advantages in terms of sensitivities and backgrounds. The observation of neutrinoless double-beta decay would show that lepton number is violated and that neutrinos are Majorana particles and would simultaneously provide information on neutrino mass. Attaining sensitivities for neutrino masses in the inverted hierarchy region, 15 - 50 meV, will require large, tonne-scale detectors with extremely low backgrounds, at the level of ?1 count/t-y or lower in the region of the signal. The MAJORANA collaboration, with funding support from DOE Office of Nuclear Physics and NSF Particle Astrophysics, is constructing the DEMONSTRATOR, an array consisting of 40 kg of p-type point-contact high-purity germanium (HPGe) detectors, of which ?30 kg will be enriched to 87% in {sup 76}Ge. The DEMONSTRATOR is being constructed in a clean room laboratory facility at the 4850' level (4300 m.w.e.) of the Sanford Underground Research Facility (SURF) in Lead, SD. It utilizes a compact graded shield approach with the inner portion consisting of ultra-clean Cu that is being electroformed and machined underground. The primary aim of the DEMONSTRATOR is to show the feasibility of a future tonne-scale measurement in terms of backgrounds and scalability.
The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76
MAJORANA Collaboration; S. R. Elliott; N. Abgrall; E. Aguayo; F. T. Avignone III; A. S. Barabash; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; D. C. Combs; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; J. Esterline; J. E. Fast; P. Finnerty; F. M. Fraenkleo; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; K. Gusev; A. L. Hallin; R. Hazama; A. Hegai; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; K. J. Keeter; M. F. Kidd; O. Kochetov; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon; L. E. Leviner; J. C. Loach; S. MacMullin; R. D. Martin; S. Mertens; L. Mizouni; M. Nomachi; J. L. Orrell; C. OShaughnessy; N. R. Overman; D. G. Phillips II; A. W. P. Poon; K. Pushkin; D. C. Radford; K. Rielage; R. G. H. Robertson; M. C. Ronquest; A. G. Schubert; B. Shanks; T. Shima; M. Shirchenko; K. J. Snavely; N. Snyder; A. Soin; J. Strain; A. M. Suriano; V. Timkin; W. Tornow; R. L. Varner; S. Vasilyev; K. Vetter; K. Vorren; B. R. White; J. F. Wilkerson; W. Xu; E. Yakushev; A. R. Young; C. -H. Yu; V. Yumatov
2013-07-30T23:59:59.000Z
The {\\sc Majorana} collaboration is searching for neutrinoless double beta decay using $^{76}$Ge, which has been shown to have a number of advantages in terms of sensitivities and backgrounds. The observation of neutrinoless double-beta decay would show that lepton number is violated and that neutrinos are Majorana particles and would simultaneously provide information on neutrino mass. Attaining sensitivities for neutrino masses in the inverted hierarchy region, $15 - 50$ meV, will require large, tonne-scale detectors with extremely low backgrounds, at the level of $\\sim$1 count/t-y or lower in the region of the signal. The {\\sc Majorana} collaboration, with funding support from DOE Office of Nuclear Physics and NSF Particle Astrophysics, is constructing the {\\sc Demonstrator}, an array consisting of 40 kg of p-type point-contact high-purity germanium (HPGe) detectors, of which $\\sim$30 kg will be enriched to 87% in $^{76}$Ge. The {\\sc Demonstrator} is being constructed in a clean room laboratory facility at the 4850' level (4300 m.w.e.) of the Sanford Underground Research Facility (SURF) in Lead, SD. It utilizes a compact graded shield approach with the inner portion consisting of ultra-clean Cu that is being electroformed and machined underground. The primary aim of the {\\sc Demonstrator} is to show the feasibility of a future tonne-scale measurement in terms of backgrounds and scalability.
Progress Towards Doubling the Beam Power at Fermilab's Accelerator Complex
Kourbanis, ioanis
2014-06-01T23:59:59.000Z
After a 14 month shutdown accelerator modifications and upgrades are in place to allow us doubling of the Main Injector beam power. We will discuss the past MI high power operation and the current progress towards doubling the power.
The effects of double-diffusion on a baroclinic vortex
Smith, Wendy Marie
1987-01-01T23:59:59.000Z
Laboratory experiments were performed to study the combined effects of double-diffusion and rotation on an oceanic intrusion. Intrusions are driven across density-compensated fronts by the divergence of the double-diffusive ...
Diapycnal advection by double diffusion and turbulence in the ocean
St. Laurent, Louis C
1999-01-01T23:59:59.000Z
Observations of diapycnal mixing rates are examined and related to diapycnal advection for both double-diffusive and turbulent regimes. The role of double-diffusive mixing at the site of the North Atlantic Tracer Release ...
The spacetime of double field theory: Review, remarks, and outlook
Hohm, Olaf
We review double field theory (DFT) with emphasis on the doubled spacetime and its generalized coordinate transformations, which unify diffeomorphisms and b-field gauge transformations. We illustrate how the composition ...
National CHP Roadmap: Doubling Combined Heat and Power Capacity...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
CHP Roadmap: Doubling Combined Heat and Power Capacity in the United States by 2010, March 2001 National CHP Roadmap: Doubling Combined Heat and Power Capacity in the United States...
Packaging and qualification of single photon counting avalanche photodiode focal plane arrays
Verghese, Simon
Avalanche Photodiode (APD) photon counting arrays are finding an increasing role in defense applications in laser radar and optical communications. As these system concepts mature, the need for reliable screening, test, ...
Photon-counting optical coherence-domain reflectometry using superconducting single-
Teich, Malvin C.
Photon-counting optical coherence-domain reflectometry using superconducting single- photon reflecting samples. In particular, we experimentally demonstrate the possibility of using superconducting. Drakinsky, J. Zhang, A. Verevkin, and R. Sobolewski, "Fabrication of nanostructured superconducting single
A High Count Rate Neutron Beam Monitor for Neutron Scattering Facilities
Barnett, Amanda [University of Tennessee, Knoxville (UTK); Crow, Lowell [ORNL; Diawara, Yacouba [ORNL; Hayward, J P [University of Tennessee, Knoxville (UTK); Hayward, Jason P [ORNL; Menhard, Kocsis [European Synchrotron Radiation Facility (ESRF); Sedov, Vladislav N [ORNL; Funk, Loren L [ORNL
2013-01-01T23:59:59.000Z
Abstract Beam monitors are an important diagnostic tool in neutron science facilities. Present beam monitors use either ionization chambers in integration mode, which are slow and have no timing information, or pulse counters which can easily be saturated by high beam intensities. At high flux neutron scattering facilities, neutron beam monitors with very low intrinsic efficiency (10-5) are presently selected to keep the counting rate within a feasible range, even when a higher efficiency would improve the counting statistics and yield a better measurement of the incident beam. In this work, we report on a high count rate neutron beam monitor. This beam monitor offers good timing with an intrinsic efficiency of 10-3 and a counting rate capability of over 1,000,000 cps without saturation.
Neutrinoless Double Beta Decay and Physics Beyond the Standard Model
Frank F. Deppisch; Martin Hirsch; Heinrich Päs
2012-08-03T23:59:59.000Z
Neutrinoless double beta decay is the most powerful tool to probe not only for Majorana neutrino masses but for lepton number violating physics in general. We discuss relations between lepton number violation, double beta decay and neutrino mass, review a general Lorentz invariant parametrization of the double beta decay rate, highlight a number of different new physics models showing how different mechanisms can trigger double beta decay, and finally discuss possibilities to discriminate and test these models and mechanisms in complementary experiments.
The Neutrinoless Double Beta Decay: The Case for Germanium Detectors
A. Morales; J. Morales
2002-11-21T23:59:59.000Z
An overview of the current status of Neutrinoless Double Beta Decay is presented, emphasizing on the case of Germanium Detectors.
Modeling a Prototype Optical Collision Avoidance Sensor For Unmanned Aerial Vehicles
Hornsey, Richard
Modeling a Prototype Optical Collision Avoidance Sensor For Unmanned Aerial Vehicles Cyrus Minwalla) are essential in controlled airspace under visual flight rules (VFR). A prototype optical sensor accomplishes and evaluation of the prototype sensor are presented here, as are preliminary measurements to clarify the roles
The Threat to the Planet: How Can We Avoid Dangerous Human-Made Climate Change?
Hansen, James E.
The Threat to the Planet: How Can We Avoid Dangerous Human-Made Climate Change? Remarks of James E to the threat of climate change has been sudden and profound. Only in recent years has the extent and immediacy-made climate change, but what level is dangerous? Chart 4. Critical metrics defining dangerous, I believe
Title of dissertation: A CONTINUUM MODEL FOR FLOCKING: OBSTACLE AVOIDANCE, EQUILIBRIUM,
Anlage, Steven
ABSTRACT Title of dissertation: A CONTINUUM MODEL FOR FLOCKING: OBSTACLE AVOIDANCE, EQUILIBRIUM, AND STABILITY Nicholas Alexander Mecholsky, Doctor of Philosophy, 2010 Dissertation directed by: Professor of animal groups is a subject of growing attention. In this dissertation, we present a partial- differential
(2013) 128 Data Center Demand Response: Avoiding the Coincident Peak via
Low, Steven H.
2013-01-01T23:59:59.000Z
(2013) 128 Data Center Demand Response: Avoiding the Coincident Peak via Workload Shifting.chen@hp.com Abstract Demand response is a crucial aspect of the future smart grid. It has the potential to provide centers' participation in demand response is becoming increasingly important given their high
On the morphology of avoided crossings in the spectrum of irregular quantum systems
Yang, Xiazhou; Burgdoerfer, J.; Eschenazi, E. (Tennessee Univ., Knoxville, TN (USA). Dept. of Physics Oak Ridge National Lab., TN (USA))
1990-01-01T23:59:59.000Z
The deformation of the energy level spectra of quantum systems as a function of a control parameter governing the strength of a non- integrable perturbation can be determined by standard molecular dynamics techniques. This method is used to analyze the distribution and morphology of avoided crossings for a system of coupled Morse oscillators. 25 refs., 4 figs.
Derisi, Joseph
Export Control in a Nutshell Avoiding Severe Federal Penalties Short Briefing for Academic of the U.S. without first conferring with your campus export office to determine if a license is required. Export regulations govern any transfer of physical objects (be it equipment, compounds, materials
Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation
Shihada, Basem
Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation Justin Manweiler Duke in a proportional decrease in battery life. We design SleepWell, a system that achieves energy efficiency by evading to turn off the de- vice whenever beneficial. While WiFi energy efficiency has progressively improved
Impact of contour on aesthetic judgments and approach-avoidance decisions in architecture
Chatterjee, Anjan
Impact of contour on aesthetic judgments and approach-avoidance decisions in architecture Oshin Department of Architecture, Design, and Media Technology, University of Aalborg, DK - 9000 Aalborg, Denmark, Spain; h The Royal Danish Academy of Fine Arts, Schools of Architecture, Design, and Conservation
Energy agencies appear to be on safe ground, avoiding California's high tide of red ink.
Kammen, Daniel M.
Energy agencies appear to be on safe ground, avoiding California's high tide of red ink, with seven dedicated to renewable energy work. Another two positions would be for new staff in the Division. The proposed budgets for state energy agencies were left largely intact in the governor's recent budget
How to avoid computing the nearfield in the Fast Multipole Method
Tausch, Johannes
How to avoid computing the nearfield in the Fast Multipole Method Johannes Tausch Southern Multipole Method FFT, Nearfield Abstract. This paper introduces a fast method for the application of sur to multiplying with a diagonal matrix. A modification of Fast Multipole Method is used to compute the potential
Fernandez, Thomas
Evolution of Driving Agent, Remotely Operating a Scale Model of a Car with Obstacle Avoidance present an approach for evolutionary design of an agent, remotely operating a scale model of a car running to the car via standard radio control transmitter. In order to cope with the video feed latency we propose
Some new self-avoiding walk and polygon models Nicholas R Beaton
Guttman, Tony
3010 Australia and ARC Centre of Excellence for Mathematics and Statistics of Complex Systems + Algorithms Project, INRIA--Rocquencourt, 78513 Le Chesnay, France School of Mathematical Sciences, Monash) on a two-dimensional lattice, enumerated by length, and of self-avoiding polygons (SAP) enumerated
Gravdahl, Jan Tommy
A COMPRESSOR SURGE CONTROL SYSTEM: COMBINATION ACTIVE SURGE CONTROL SYSTEM AND SURGE AVOIDANCE- trifugal compressor is presented. ASCS is a promising method to improve compressor operating area by stabilizing surge. However, this method is not applied yet in industrial compressors. Safety issue
Green's Function for a Hierarchical Self-Avoiding Walk in Four Dimensions
Green's Function for a Hierarchical Self-Avoiding Walk in Four Dimensions David C. Brydges #3 . Apart from completing the program in the #12;rst paper, the main result is that the Green's function is almost equal to the Green's function for the Markov process with no self-repulsion, but at a di#11;erent
INVASIVE RODENTS ON ISLANDS Avoiding surprise effects on Surprise Island: alien species
Courchamp, Franck
INVASIVE RODENTS ON ISLANDS Avoiding surprise effects on Surprise Island: alien species control Abstract Eradications of invasive alien species have generally benefited biodiversity. However, without following the sudden removal of an invasive alien that was exerting an ecological force on those species
Residual-Energy-Activated Cooperative Transmission (REACT) to Avoid the Energy Hole
Ingram, Mary Ann
Residual-Energy-Activated Cooperative Transmission (REACT) to Avoid the Energy Hole Jin Woo Jung of the excess energy to do cooperative transmission (CT) to hop directly to the Sink, thereby relieving residual energy than the current node. The paper considers several criteria for selecting the cooperators
A system for the determination of uranium in meteorites by delayed -neutron counting
Riley, John Edward
1971-01-01T23:59:59.000Z
'iASTER OF SCIE'iCE December 1971 Major Subject: Chemistry A System for the Determination of Uranium in Meteorites by Delayed-Heutron Counting A Thesis John Edward Riley, Jr. Approved as to style and content by: (Chairman of Committee) (Head... of Department) (Member) (Member) December 1971 ABSTRACT A System for the Determination of Uranium in Meteorites by Delayed-Neutron Counting. (December, 1971) John Edward Riley, Jr. , B. S. , St. Louis University Directed by: Dr. Marvin W. Rowe...
A system for the determination of uranium in meteorites by delayed -neutron counting
Riley, John Edward
1971-01-01T23:59:59.000Z
of Department) (Member) (Member) December 1971 ABSTRACT A System for the Determination of Uranium in Meteorites by Delayed-Neutron Counting. (December, 1971) John Edward Riley, Jr. , B. S. , St. Louis University Directed by: Dr. Marvin W. Rowe...A System for the Determination of Uranium in Meteorites by Delayed-Neutron Counting A Thesis John Edward Riley, Jr. Submitted to the Graduate College of Te-. :as A&M University in nart' al fulfillment of the reouirement for the degree ot i...
The determination of exchangeable potassium in the canine with the aid of whole body counting
Followill, David
1983-01-01T23:59:59.000Z
THE DETERMINATION OF EXCHANGEABLE POTASSIUM IN THE CANINE WITH THE AID OF WHOLE BODY COUNTING A Thesis by DAVID FOLLOWILL Approved as to style and content by: chard eff (Chairman of C mittee) Dan H ghtower (Member) erald Schlapper (Member...) Carl E. Erdman (Head of Department) August 1983 ABSTRACT Determination of Exchangeable Potassium in the Canine with the Aid of Whole Body Counting. ( August 1983) David Followill, B. S. , Texas AAM University Chairman of Advisory Committee: Dr...
When Do Their Casualties Count? Exploring Wartime Decisions that Pit Security Against Harm
Roblyer, Dwight Andrew
2011-02-22T23:59:59.000Z
WHEN DO THEIR CASUALTIES COUNT? EXPLORING WARTIME DECISIONS THAT PIT SECURITY AGAINST HARM A Dissertation by DWIGHT ANDREW ROBLYER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2009 Major Subject: Political Science WHEN DO THEIR CASUALTIES COUNT? EXPLORING WARTIME DECISIONS THAT PIT SECURITY AGAINST HARM A Dissertation by DWIGHT ANDREW ROBLYER...
Sensitivity of CUORE to Neutrinoless Double-Beta Decay
Alessandria, F.
2013-01-01T23:59:59.000Z
of CUORE to Neutrinoless Double-Beta Decay b c,:L d e f F .s t results on neutrinoless double beta decay of T e w i t hthe study of neutrinoless double beta decay, J . C r y s t .
The Majorana Neutrinoless Double-Beta Decay Experiment
Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group
The Majorana Neutrinoless Double-Beta Decay Experiment Pre-conceptual Design Proposal November 22 Motivation for Neutrinoless Double-Beta Decay Experiments . . . . . . . . . 4 2.1.1 Community Guidance Neutrinoless Double-Beta Decay Results . . . . . . . . . . . . . . . . . . . . 12 2.5 Next
The Contribution of Faint Blue Galaxies to the Sub-mm Counts and Background
Geoff S. Busswell; Tom Shanks
2000-10-24T23:59:59.000Z
Observations in the submillimetre waveband have recently revealed a new population of luminous, sub-mm sources. These are proposed to lie at high redshift and to be optically faint due to their high intrinsic dust obscuration. The presence of dust has been previously invoked in optical galaxy count models which assume $\\tau=9$ Gyr Bruzual & Charlot evolution for spirals and these fit the count data well from U to K. We now show that by using either a 1/$\\lambda$ or Calzetti absorption law for the dust and re-distributing the evolved spiral galaxy UV radiation into the far infra-red(FIR), these models can account for all of the `faint'($\\leq1$mJy) $850\\mu$m galaxy counts, but fail to fit 'bright'($\\ge2$mJy) sources, indicating that another explanation for the sub-mm counts may apply at brighter fluxes(e.g. QSOs, ULIRGs). We find that the main contribution to the faint, sub-mm number counts is in the redshift range $0.5 < z < 3$, peaking at $z\\approx 1.8$. The above model, using either dust law, can also explain a significant proportion of the extra-galactic background at $850\\mu$m as well as producing a reasonable fit to the bright $60\\mu m$ IRAS counts.
Importance of neutrinoless double beta decay
Utpal Sarkar
2007-12-17T23:59:59.000Z
A natural explanation for the smallness of the neutrino mass requires them to be Majorana particles violating lepton number by two units. Since lepton number violation can have several interesting consequences in particle physics and cosmology, it is of utmost importance to find out if there is lepton number violation in nature and what is its magnitude. The neutrinoless double beta decay experiment can answer these questions: if there is lepton number violation and if neutrinos are Majorana particles. In addition, the magnitude of neutrinoless double beta decay will constrain any other lepton number violating processes. This lepton number violation may also be relatd to the matter-antimatter asymmetry of the universe, dark matter and cosmological constant.
Simulation of Double-Pulse Laser Ablation
Povarnitsyn, Mikhail E.; Khishchenko, Konstantin V.; Levashov, Pavel R. [Joint Institute for High Temperatures of RAS, Izhorskaya 13 Bldg 2, Moscow, 125412 (Russian Federation); Itina, Tatian E. [Laboratoire Hubert Curien, UMR CNRS 5516, 18 rue Benoit Lauras, Bat. F, 42000, St-Etienne (France)
2010-10-08T23:59:59.000Z
We investigate the physical reasons of a strange decrease in the ablation depth observed in femtosecond double-pulse experiments with increasing delay between the pulses. Two ultrashort pulses of the same energy produce the crater which is less than that created by a single pulse. Hydrodynamic simulation shows that the ablation mechanism is suppressed when the delay between the pulses exceeds the electron-ion relaxation time. In this case, the interaction of the second laser pulse with the expanding target material leads to the formation of the second shock wave suppressing the rarefaction wave created by the first pulse. The modeling of the double-pulse ablation for different delays between pulses confirms this explanation.
JUNO and Neutrinoless Double Beta Decay
Shao-Feng Ge; Werner Rodejohann
2015-07-20T23:59:59.000Z
We study the impact of the precision determination of oscillation parameters in the JUNO experiment on half-life predictions for neutrinoless double beta decay. We show that the solar neutrino mixing angle can be measured by JUNO with below 1% uncertainty. This implies in particular that the minimal value of the effective mass in the inverted mass ordering will be known essentially without uncertainty. We demonstrate that this reduces the range of half-life predictions in order to test this value by a factor of two. The remaining uncertainty is caused by nuclear matrix elements. This has important consequences for future double beta decay experiments that aim at ruling out the inverted mass ordering or the Majorana nature of neutrinos.
JUNO and Neutrinoless Double Beta Decay
Ge, Shao-Feng
2015-01-01T23:59:59.000Z
We study the impact of the precision determination of oscillation parameters in the JUNO experiment on half-life predictions for neutrinoless double beta decay. We show that the solar neutrino mixing angle can be measured by JUNO with below 1% uncertainty. This implies in particular that the minimal value of the effective mass in the inverted mass ordering will be known essentially without uncertainty. We demonstrate that this reduces the range of half-life predictions in order to test this value by a factor of two. The remaining uncertainty is caused by nuclear matrix elements. This has important consequences for future double beta decay experiments that aim at ruling out the inverted mass ordering or the Majorana nature of neutrinos.
Double pulse Thomson scattering system at RTP
Beurskens, M.N.; Barth, C.J.; Chu, C.C.; Donne, A.J.; Herranz, J.A.; Lopes Cardozo, N.J.; van der Meiden, H.J.; Pijper, F.J. [FOM-Instituut voor Plasmafysica `Rijnhuizen`, Associatie Euratom-FOM, 3430 BE Nieuwegein (The Netherlands)] [FOM-Instituut voor Plasmafysica `Rijnhuizen`, Associatie Euratom-FOM, 3430 BE Nieuwegein (The Netherlands)
1997-01-01T23:59:59.000Z
In this article a double pulse multiposition Thomson scattering diagnostic, under construction at RTP, is discussed. Light from a double pulsed ruby laser (pulse separation: 10{endash}800 {mu}s, max. 2{times}12.5 J) is scattered by the free electrons of the tokamak plasma and relayed to a Littrow polychromator for spectral analysis. The spectrally resolved light is recorded by two ICCD detectors. Simulations show that the system sensitivity will be such that electron temperatures in the range of 100 eV{endash}7 keV can be determined with an accuracy as good as 2{percent}{endash}3{percent} for electron densities of 10{sup 20} m{sup {minus}3}, with a spatial resolution down to 2.6 mm. With this diagnostic the dynamics of small scale structures in the electron temperature profile will be studied. {copyright} {ital 1997 American Institute of Physics.}
Neutrinoless Double Beta Decay in Particle Physics
Werner Rodejohann
2010-11-22T23:59:59.000Z
Neutrinoless double beta decay is a process of fundamental importance for particle physics. It can be mediated by light massive Majorana neutrinos (standard interpretation) or by something else (non-standard interpretations). We review its dependence on the neutrino parameters, its complementarity to other observables sensitive to neutrino mass, and emphasize its ability to distinguish different neutrino mass models. Then we discuss mechanisms different from light Majorana neutrino exchange, and show what can be learned from those and how they could be tested.
Neutrinoless Double Beta Decay and its "Inverse"
Clemens A. Heusch; Peter Minkowski
1996-11-18T23:59:59.000Z
Recent considerations by these authors pointed out the attractive features which a search for the exchange of heavy Majorana neutrinos could have for solving the mass and the lepton number puzzles for all neutrinos, in TeV-level electron-electron scattering. In the present note, we show that, contrary to subsequently published arguments, non-observation of neutrinoless double beta decay has, to date, no bearing on the promise of this important task for future linear electron colliders.
Double-clad nuclear fuel safety rod
McCarthy, William H. (Los Altos, CA); Atcheson, Donald B. (Cupertino, CA); Vaidyanathan, Swaminathan (San Jose, CA)
1984-01-01T23:59:59.000Z
A device for shutting down a nuclear reactor during an undercooling or overpower event, whether or not the reactor's scram system operates properly. This is accomplished by double-clad fuel safety rods positioned at various locations throughout the reactor core, wherein melting of a secondary internal cladding of the rod allows the fuel column therein to shift from the reactor core to place the reactor in a subcritical condition.
Double Talk: Asturias's America in Cuculcán
Unruh, Vicky
1992-09-01T23:59:59.000Z
Vicky Unruh, University of Kansas Double Talk: Asturias's America in Cuculcan^ M iguel Angel Asturias's Cuculcan, a dra- matic collage of color, sound, motion, and words, is his most overtly ethnographic play, and, as a product of his... vanguardist years, it is also the most radically experimental. Cuculcan did not appear in print until 1948,2 but Asturias de- scribed the work in progress in a 1932 journalis- tic essay, "Las posibilidades de un teatro americano."3 Although both Cuculcan...
A background free double beta decay experiment
Ioannis Giomataris
2010-12-20T23:59:59.000Z
We present a new detection scheme for rejecting backgrounds in neutrino less double beta decay experiments. It relies on the detection of Cherenkov light emitted by electrons in the MeV region. The momentum threshold is tuned to reach a good discrimination between background and good events. We consider many detector concepts and a range of target materials. The most promising is a high-pressure 136Xe emitter for which the required energy threshold is easily adjusted. Combination of this concept and a high pressure Time Projection Chamber could provide an optimal solution. A simple and low cost effective solution is to use the Spherical Proportional Counter that provides two delayed signals from ionization and Cherenkov light. In solid-state double beta decay emitters, because of their higher density, the considered process is out of energy range. An alternative solution could be the development of double decay emitters with lower density by using for instance the aerogel technique. It is surprising that a technology used for particle identification in high-energy physics becomes a powerful tool for rejecting backgrounds in such low-energy experiments.
Double-Difference Tomography for Sequestration MVA
Westman, Erik
2008-12-31T23:59:59.000Z
Analysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO2 plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. The geophone arrays with widely-varying geophone locations, both laterally and vertically, performed best. Additionally, double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, and accounting (MVA) of sequestered CO2. A total of 1,211 seismic events were recorded from a borehole array consisting of 22 geophones. Artificial velocity models were created to determine the ease with which different CO2 plume locations and sizes can be detected. Most likely because of the poor geophone arrangement, a low velocity zone in the Desert Creek reservoir can only be detected when regions of test site containing the highest ray path coverage are considered. MVA accuracy and precision may be improved through the use of a receiver array that provides more comprehensive ray path coverage.
Double beta decays of {sup 106}Cd
Suhonen, Jouni [Department of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyvaeskylae (Finland)
2011-12-16T23:59:59.000Z
The two-neutrino (2{nu}2{beta}) and neutrinoless (0{nu}2{beta}) double beta decays of {sup 106}Cd are studied for the transitions to the ground state 0{sub gs}{sup +} and 0{sup +} and 2{sup +} excited states in {sup 106}Pd by using realistic many-body wave functions calculated in the framework of the quasiparticle random-phase approximation. Effective, G-matrix-derived nuclear forces are used in realistic single-particle model spaces. All the possible channels, {beta}{sup +}{beta}{sup +}, {beta}{sup +}EC, and ECEC, are discussed for both the 2{nu}2{beta} and 0{nu}2{beta} decays. The associated half-lives are computed and particular attention is devoted to the study of the detectability of the resonant neutrinoless double electron capture (R0{nu}ECEC) process in {sup 106}Cd. The calculations of the present article constitute the thus far most complete and up-to-date investigation of the double-beta-decay properties of {sup 106}Cd.
Vibration of Generalized Double Well Oscillators
Grzegorz Litak; Marek Borowiec; Arkadiusz Syta
2006-10-20T23:59:59.000Z
We have applied the Melnikov criterion to examine a global homoclinic bifurcation and transition to chaos in a case of a double well dynamical system with a nonlinear fractional damping term and external excitation. The usual double well Duffing potential having a negative square term and positive quartic term has been generalized to a double well potential with a negative square term and a positive one with an arbitrary real exponent $q > 2$. We have also used a fractional damping term with an arbitrary power $p$ applied to velocity which enables one to cover a wide range of realistic damping factors: from dry friction $p \\to 0$ to turbulent resistance phenomena $p=2$. Using perturbation methods we have found a critical forcing amplitude $\\mu_c$ above which the system may behave chaotically. Our results show that the vibrating system is less stable in transition to chaos for smaller $p$ satisfying an exponential scaling low. The critical amplitude $\\mu_c$ as an exponential function of $p$. The analytical results have been illustrated by numerical simulations using standard nonlinear tools such as Poincare maps and the maximal Lyapunov exponent. As usual for chosen system parameters we have identified a chaotic motion above the critical Melnikov amplitude $\\mu_c$.
Artusa, D. R.
2014-01-01T23:59:59.000Z
Exploring the Neutrinoless Double Beta Decay in the InvertedC. Giunti, Neutrinoless double-beta decay. A brief review,el- ements for neutrinoless double-beta decay and double-
Cosmic ray neutron background reduction using localized coincidence veto neutron counting
Menlove, Howard O. (Los Alamos, NM); Bourret, Steven C. (Los Alamos, NM); Krick, Merlyn S. (Los Alamos, NM)
2002-01-01T23:59:59.000Z
This invention relates to both the apparatus and method for increasing the sensitivity of measuring the amount of radioactive material in waste by reducing the interference caused by cosmic ray generated neutrons. The apparatus includes: (a) a plurality of neutron detectors, each of the detectors including means for generating a pulse in response to the detection of a neutron; and (b) means, coupled to each of the neutrons detectors, for counting only some of the pulses from each of the detectors, whether cosmic ray or fission generated. The means for counting includes a means that, after counting one of the pulses, vetos the counting of additional pulses for a prescribed period of time. The prescribed period of time is between 50 and 200 .mu.s. In the preferred embodiment the prescribed period of time is 128 .mu.s. The veto means can be an electronic circuit which includes a leading edge pulse generator which passes a pulse but blocks any subsequent pulse for a period of between 50 and 200 .mu.s. Alternately, the veto means is a software program which includes means for tagging each of the pulses from each of the detectors for both time and position, means for counting one of the pulses from a particular position, and means for rejecting those of the pulses which originate from the particular position and in a time interval on the order of the neutron die-away time in polyethylene or other shield material. The neutron detectors are grouped in pods, preferably at least 10. The apparatus also includes means for vetoing the counting of coincidence pulses from all of the detectors included in each of the pods which are adjacent to the pod which includes the detector which produced the pulse which was counted.
User's guide to SERICPAC: A computer program for calculating electric-utility avoided costs rates
Wirtshafter, R.; Abrash, M.; Koved, M.; Feldman, S.
1982-05-01T23:59:59.000Z
SERICPAC is a computer program developed to calculate average avoided cost rates for decentralized power producers and cogenerators that sell electricity to electric utilities. SERICPAC works in tandem with SERICOST, a program to calculate avoided costs, and determines the appropriate rates for buying and selling of electricity from electric utilities to qualifying facilities (QF) as stipulated under Section 210 of PURA. SERICPAC contains simulation models for eight technologies including wind, hydro, biogas, and cogeneration. The simulations are converted in a diversified utility production which can be either gross production or net production, which accounts for an internal electricity usage by the QF. The program allows for adjustments to the production to be made for scheduled and forced outages. The final output of the model is a technology-specific average annual rate. The report contains a description of the technologies and the simulations as well as complete user's guide to SERICPAC.
Attraction to and Avoidance of instream Hydrokinetic Turbines by Freshwater Aquatic Organisms
Cada, Glenn F [ORNL; Bevelhimer, Mark S [ORNL
2011-05-01T23:59:59.000Z
The development of hydrokinetic (HK) energy projects is under consideration at over 150 sites in large rivers in the United States, including the Mississippi, Ohio, Tennessee, and Atchafalaya Rivers. These waterbodies support numerous fish species that might interact with the HK projects in a variety of ways, e.g., by attraction to or avoidance of project structures. Although many fish species inhabit these rivers (about 172 species in the Mississippi River alone), not all of them will encounter the HK projects. Some species prefer low-velocity, backwater habitats rather than the high-velocity, main channel areas that would be the best sites for HK. Other, riverbank-oriented species are weak swimmers or too small to inhabit the main channel for significant periods of time. Some larger, main channel fish species are not known to be attracted to structures. Based on a consideration of habitat preferences, size/swim speed, and behavior, fish species that are most likely to be attracted to HK structures in the main channel include carps, suckers, catfish, white bass, striped bass, smallmouth bass, spotted bass, and sauger. Proper siting of the project in order to avoid sensitive fish populations, backwater and fish nursery habitat areas, and fish migration corridors will likely minimize concerns about fish attraction to or avoidance of HK structures.
Schafe, Glenn
-trial inhibitory avoidance learning. Immediate post-training infusions of musci- mol had no effect on Pavlovian conditioning but produced a dose-dependent effect on inhibitory avoidance. However, pre- training infusions pre-training infusions of drugs are inherently confounded because of the likelihood that these drugs
Neutrinoless double beta decay and neutrino masses
Duerr, Michael [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)
2012-07-27T23:59:59.000Z
Neutrinoless double beta decay (0{nu}{beta}{beta}) is a promising test for lepton number violating physics beyond the standard model (SM) of particle physics. There is a deep connection between this decay and the phenomenon of neutrino masses. In particular, we will discuss the relation between 0{nu}{beta}{beta} and Majorana neutrino masses provided by the so-called Schechter-Valle theorem in a quantitative way. Furthermore, we will present an experimental cross check to discriminate 0{nu}{beta}{beta} from unknown nuclear background using only one isotope, i.e., within one experiment.
Neutrinoless double beta decay and QCD corrections
Namit Mahajan
2014-01-30T23:59:59.000Z
We consider one loop QCD corrections and renormalization group running of the neutrinoless double beta decay amplitude focusing on the short-range part of the amplitude (without the light neutrino exchange) and find that these corrections can be sizeable. Depending on the operator under consideration, there can be moderate to large cancellations or significant enhancements. We discuss several specific examples in this context. Such large corrections will lead to significant shifts in the half-life estimates which currently are known to be plagued with the uncertainties due to nuclear physics inputs to the physical matrix elements.
Double acting stirling engine phase control
Berchowitz, David M. (Scotia, NY)
1983-01-01T23:59:59.000Z
A mechanical device for effecting a phase change between the expansion and compression volumes of a double-acting Stirling engine uses helical elements which produce opposite rotation of a pair of crankpins when a control rod is moved, so the phase between two pairs of pistons is changed by +.psi. and the phase between the other two pairs of pistons is changed by -.psi.. The phase can change beyond .psi.=90.degree. at which regenerative braking and then reversal of engine rotation occurs.
The Double Flash Meets the Bhangmeter
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey Inside theFacebookTechnicalBio-InspiredtechnologiesTechnology The1TheDouble Flash National
Optical double-slit particle measuring system
Tichenor, D.A.; Wang, J.C.F.; Hencken, K.R.
1982-03-25T23:59:59.000Z
A method for in situ measurement of particle size is described. The size information is obtained by scanning an image of the particle across a double-slit mask and observing the transmitted light. This method is useful when the particle size of primary interest is 3..mu..m and larger. The technique is well suited to applications in which the particles are non-spherical and have unknown refractive index. It is particularly well suited to high temperature environments in which the particle incandescence provides the light source.
Optical double-slit particle measuring system
Hencken, Kenneth R. (Pleasanton, CA); Tichenor, Daniel A. (Freemont, CA); Wang, James C. F. (Livermore, CA)
1984-01-01T23:59:59.000Z
A method for in situ measurement of particle size is described. The size information is obtained by scanning an image of the particle across a double-slit mask and observing the transmitted light. This method is useful when the particle size of primary interest is 3 .mu.m and larger. The technique is well suited to applications in which the particles are non-spherical and have unknown refractive index. It is particularly well suited to high temperature environments in which the particle incandescence provides the light source.
On power-counting renormalizability of Ho?ava gravity with detailed balance
Daniele Vernieri
2015-02-23T23:59:59.000Z
We consider the version of Ho\\v{r}ava gravity where "detailed balance" is consistently implemented, such as to limitate the huge proliferation of couplings in the full theory and to obtain an healthy dynamics at low-energy. Since a superpotential which is third-order in spatial derivatives is not sufficient to guarantee the power-counting renormalizability of the spin-0 graviton, then one needs to go an order beyond in derivatives, building up a superpotential up to fourth-order spatial derivatives. Here, we perturb the action to quadratic order around flat space, and show that power-counting renormalizability of the spin-0 graviton is achieved only by setting to zero a specific coupling of the theory, while the spin-2 graviton is always power-counting renormalizable for any choice of the couplings. This result raises serious doubts about the use of detailed balance.
On power-counting renormalizability of Ho\\v{r}ava gravity with detailed balance
Vernieri, Daniele
2015-01-01T23:59:59.000Z
We consider the version of Ho\\v{r}ava gravity where "detailed balance" is consistently implemented, such as to limitate the huge proliferation of couplings in the full theory and to obtain an healthy dynamics at low-energy. Since a superpotential which is third-order in spatial derivatives is not sufficient to guarantee the power-counting renormalizability of the spin-0 graviton, then one needs to go an order beyond in derivatives, building up a superpotential up to fourth-order spatial derivatives. Here, we perturb the action to quadratic order around flat space, and show that power-counting renormalizability of the spin-0 graviton is achieved only by setting to zero a specific coupling of the theory, while the spin-2 graviton is always power-counting renormalizable for any choice of the couplings. This result raises serious doubts about the use of detailed balance.
Anomalous dimensions determine the power counting -- Wilsonian RG analysis of nuclear EFT --
Harada, K; Harada, Koji; Kubo, Hirofumi
2006-01-01T23:59:59.000Z
The Legendre flow equation, a version of exact Wilsonian renormalization group (WRG) equation, is employed to consider the power counting issues in Nuclear Effective Field Theory. A WRG approach is an ideal framework because it is nonperturbative and does not require any prescribed power counting rule. The power counting is determined systematically from the scaling dimensions of the operators at the nontrivial fixed point. The phase structure is emphasized and the inverse of the scattering length, which is identified as a relevant coupling, is shown to play a role of the order parameter. The relations to the work done by Birse, McGovern, and Richardson and to the Kaplan-Savage-Wise scheme are explained.
Anomalous dimensions determine the power counting -- Wilsonian RG analysis of nuclear EFT --
Koji Harada; Hirofumi Kubo
2006-10-24T23:59:59.000Z
The Legendre flow equation, a version of exact Wilsonian renormalization group (WRG) equation, is employed to consider the power counting issues in Nuclear Effective Field Theory. A WRG approach is an ideal framework because it is nonperturbative and does not require any prescribed power counting rule. The power counting is determined systematically from the scaling dimensions of the operators at the nontrivial fixed point. The phase structure is emphasized and the inverse of the scattering length, which is identified as a relevant coupling, is shown to play a role of the order parameter. The relations to the work done by Birse, McGovern, and Richardson and to the Kaplan-Savage-Wise scheme are explained.
Double parton scattering at high energies
Antoni Szczurek
2015-04-24T23:59:59.000Z
We discuss a few examples of rich newly developing field of double parton scattering. We start our presentation from production of two pairs of charm quark-antiquark and argue that it is the golden reaction to study the double parton scattering effects. In addition to the DPS we consider briefly also mechanism of single parton scattering and show that it gives much smaller contribution to the $c \\bar c c \\bar c$ final state. Next we discuss a perturbative parton-splitting mechanism which should be included in addition to the conventional DPS mechanism. We show that the presence of this mechanism unavoidably leads to collision energy and other kinematical variables dependence of so-called $\\sigma_{eff}$ parameter being extracted from different experiments. Next we briefly discuss production of four jets. We concentrate on estimation of the contribution of DPS for jets remote in rapidity. Understanding of this contribution is very important in the context of searches for BFKL effects known under the the name Mueller-Navelet jets. We discuss the situation in a more general context. Finally we briefly mention about DPS effects in production of $W^+ W^-$. Outlook closes the presentation.
Photon counting for quantum key distribution with Peltier cooled InGaAs/InP APD's
Damien Stucki; Grégoire Ribordy; André Stefanov; Hugo Zbinden; John G. Rarity; Tom Wall
2001-06-01T23:59:59.000Z
The performance of three types of InGaAs/InP avalanche photodiodes is investigated for photon counting at 1550 nm in the temperature range of thermoelectric cooling. The best one yields a dark count probability of $% 2.8\\cdot 10^{-5}$ per gate (2.4 ns) at a detection efficiency of 10% and a temperature of -60C. The afterpulse probability and the timing jitter are also studied. The results obtained are compared with those of other papers and applied to the simulation of a quantum key distribution system. An error rate of 10% would be obtained after 54 kilometers.
Ianakiev, Kiril D. (Los Alamos, NM); Hsue, Sin Tao (Santa Fe, NM); Browne, Michael C. (Los Alamos, NM); Audia, Jeffrey M. (Abiquiu, NM)
2006-07-25T23:59:59.000Z
The present invention includes an apparatus and corresponding method for temperature correction and count rate expansion of inorganic scintillation detectors. A temperature sensor is attached to an inorganic scintillation detector. The inorganic scintillation detector, due to interaction with incident radiation, creates light pulse signals. A photoreceiver processes the light pulse signals to current signals. Temperature correction circuitry that uses a fast light component signal, a slow light component signal, and the temperature signal from the temperature sensor to corrected an inorganic scintillation detector signal output and expanded the count rate.
Photon counting for quantum key distribution with Peltier cooled InGaAs/InP APD's
Stucki, D; Stefanov, A; Zbinden, H; Rarity, J G; Wall, T; Stucki, Damien; Ribordy, Gr\\'{e}goire; Stefanov, Andr\\'{e}; Zbinden, Hugo; Rarity, John G.; Wall, Tom
2001-01-01T23:59:59.000Z
The performance of three types of InGaAs/InP avalanche photodiodes is investigated for photon counting at 1550 nm in the temperature range of thermoelectric cooling. The best one yields a dark count probability of $% 2.8\\cdot 10^{-5}$ per gate (2.4 ns) at a detection efficiency of 10% and a temperature of -60C. The afterpulse probability and the timing jitter are also studied. The results obtained are compared with those of other papers and applied to the simulation of a quantum key distribution system. An error rate of 10% would be obtained after 54 kilometers.
Neutrinoless double beta decay search with the NEMO 3 experiment
Irina Nasteva; for the NEMO 3 Collaboration
2008-10-03T23:59:59.000Z
The NEMO 3 experiment searches for neutrinoless double beta decay and makes precision measurements of two-neutrino double beta decay in seven isotopes. The latest two-neutrino half-life results are presented, together with the limits on neutrinoless half-lives and the corresponding effective Majorana neutrino masses. Also given are the limits obtained on neutrinoless double beta decay mediated by Rp-violating SUSY, right-hand currents and different Majoron emission modes.
Search for neutrinoless double beta decay with NEMO 3 experiment
Zornitza Daraktchieva
2009-01-18T23:59:59.000Z
NEMO 3 experiment is designed to search for neutrinoless double beta decay. It is located in the Modane Underground Laboratory (LSM) and has been taking data since February 2003. The half- lives of two neutrino beta decay have been measured for seven isotopes. No evidence of neutrinoless double beta decay has been found. The limits on both the half-lives of the neutrinoless double beta decay and the corresponding Majorana effective masses are derived
Neutrinoless double beta decay search with the NEMO 3 experiment
Nasteva, Irina [Particle Physics Group, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom)
2008-11-23T23:59:59.000Z
The NEMO 3 experiment searches for neutrinoless double beta decay and makes precision measurements of two-neutrino double beta decay in seven isotopes. The latest two-neutrino half-life results are presented, together with the limits on neutrinoless half-lives and the corresponding effective Majorana neutrino masses. Also given are the limits obtained on neutrinoless double beta decay mediated by R{sub p}-violating SUSY, right-hand currents and different Majoron emission modes.
Neutrinoless Double Beta Decay in Supersymmetric Seesaw model
Tai-Fu Feng; Xue-Qian Li; Yan-An Luo
2002-09-26T23:59:59.000Z
Inspired by the recent HEIDELBERG-MOSCOW double beta decay experiment, we discuss the neutrinoless double beta decay in the supersymmetric seesaw model. Our numerical analysis indicates that we can naturally explain the data of the observed neutrinoless double beta decay, as well as that of the solar and atmospheric neutrino experiments with at least one Majorana-like sneutrino of middle energy scale in the model.
Half-lives of Double $?^+$-decay with Two Neutrinos
Yuejiao Ren; Zhongzhou Ren
2015-01-07T23:59:59.000Z
Nuclear double $\\beta ^-$-decays with two neutrinos were observed for many years and a systematic law describing the relation between their half-lives and decay energies was also proposed recently [Phys. Rev. C89, 064603 (2014)]. However, double $\\beta ^+$-decay ($\\beta ^+\\beta^+)$ with emission of both two positrons and two neutrinos has not been observed up to date. In this article, we perform a systematic analysis on the candidates of double $\\beta ^+$-decay, based on the 2012 nuclear mass table. Eight nuclei are found to be the good candidates for double $\\beta ^+$-decay and their half-lives are predicted according to the generalization of the systematic law to double $\\beta ^+$-decay. As far as we know, there is no theoretical result on double $\\beta ^+$-decay of nucleus $^{154}Dy$ and our result is the first prediction on this nucleus. This is also the first complete research on eight double $\\beta ^+$-decay candidates based on the available data of nuclear masses. It is expected that the calculated half-lives of double $\\beta ^+$-decay in this article will be useful for future experimental search of double $\\beta ^+$-decay.
Majorana Neutrino Masses from Neutrinoless Double Beta Decay and Cosmology
V. Barger; K. Whisnant
1999-04-08T23:59:59.000Z
When three Majorana neutrinos describe the solar and atmospheric neutrino data via oscillations, a nonzero measurement of neutrinoless double beta ($0\
Surface-plasmons lasing in double-graphene-layer structures
Dubinov, A. A. [Research Institute for Electrical Communication, Tohoku University, Sendai 980-8577 (Japan); Institute for Physics of Microstructures of Russian Academy of Sciences, and Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod 603950 (Russian Federation); Aleshkin, V. Ya. [Institute for Physics of Microstructures of Russian Academy of Sciences, and Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod 603950 (Russian Federation); Ryzhii, V. [Research Institute for Electrical Communication, Tohoku University, Sendai 980-8577 (Japan); Center for Photonics and Infrared Engineering, Bauman Moscow State Technical University, Moscow 105005 (Russian Federation); Shur, M. S. [Department of Electrical, Electronics, and System Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States); Otsuji, T. [Research Institute for Electrical Communication, Tohoku University, Sendai 980-8577 (Japan)
2014-01-28T23:59:59.000Z
We consider the concept of injection terahertz lasers based on double-graphene-layer (double-GL) structures with metal surface-plasmon waveguide and study the conditions of their operation. The laser under consideration exploits the resonant radiative transitions between GLs. This enables the double-GL laser room temperature operation and the possibility of voltage tuning of the emission spectrum. We compare the characteristics of the double-GL lasers with the metal surface-plasmon waveguides with those of such laser with the metal-metal waveguides.
Exploring the Neutrinoless Double Beta Decay in the Inverted...
Office of Scientific and Technical Information (OSTI)
Exploring the Neutrinoless Double Beta Decay in the Inverted Neutrino Hierarchy with Bolometric Detectors Citation Details In-Document Search Title: Exploring the Neutrinoless...
The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta...
Office of Scientific and Technical Information (OSTI)
Conference: The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76 Citation Details In-Document Search Title: The MAJORANA DEMONSTRATOR: A Search...
Neutrinoless double beta decay can constrain neutrino dark matter
V. Barger; S. L. Glashow; D. Marfatia; K. Whisnant
2002-02-26T23:59:59.000Z
We examine how constraints can be placed on the neutrino component of dark matter by an accurate measurement of neutrinoless double beta ($0\
75 years of double beta decay: yesterday, today and tomorrow
A. S. Barabash
2011-01-24T23:59:59.000Z
In this report I will briefly review the motivation and history of double beta decay search since the first consideration of two neutrino process (2$\\beta(2\
DUF6 Project Doubles Production in 2013 | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
year 2013 goal by converting 13,679 metric tons of depleted uranium hexafluoride (DUF6), more than doubling production a year earlier. EM's Portsmouth Paducah Project Office...
Avoiding a Train Wreck: Replacing Old Coal Plants with Energy Efficiency,
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankShale_Gas.pdfService on the TargetFY12 DOECommentsLLCOperated by theDesignAutotuneAvoid Nuisance
High counting rates of x-ray photon detection using APD detectors on synchrotron machines
Kakuno, E. M.; Giacomolli, B. A.; Scorzato, C. R. [Universidade Federal do Pampa - UNIPAMPA-Bage, 96413-170 (Brazil); Laboratorio Nacional de Luz Sincrotron - LNLS, 13086-100 (Brazil)
2012-05-17T23:59:59.000Z
In this work we show the results of 10 x 10 mm{sup 2} Si-APD detector's test with guard ring detecting x-rays. The result of mapping surface is also exhibited. We show and discuss the difficulty of single photon detection in high counting rate experiments in synchrotrons machines.
Bayesian Multivariate Poisson Regression for Models of Injury Count, by Severity
Kockelman, Kara M.
Bayesian Multivariate Poisson Regression for Models of Injury Count, by Severity By Jianming Ma, and lead to potential biases in sample databases. This paper offers a multivariate Poisson specification severity, Gibbs sampler, Markov chain Monte Carlo (MCMC) simulation, multivariate Poisson regression #12
Enderlein, Jörg
Dead-time optimized time-correlated photon counting instrument with synchronized, independent timing channels Michael Wahla and Hans-Jürgen Rahn PicoQuant GmbH, Rudower Chaussee 29, D-12489 Berlin December 2006; accepted 19 February 2007; published online 23 March 2007 Time-correlated single photon
Ultra-clean underground counting facility for low-level environmental samples
Winn, W.G.; Bowman, W.W.; Boni, A.L.
1987-09-01T23:59:59.000Z
An underground counting facility has been designed and constructed to improve detection of low-level radionuclides. The 3.0 x 4.3 x 2.4 m counting chamber is placed 14.3 m below ground, has 10.2-cm thick walls of pre-WWII naval armor plate, and is further shielded by a minimum of 1.2 m of specular hematite. The total overburden of shielding is equivalent to 31.7 m of water. Careful selection of building materials and a special air filtering system maintain a cleanroom environment with minimum contamination potential. Background improvements are noted relative to an earlier ground-level counting chamber with 30.5-cm-thick walls of pre-WWII naval armor plate. Performance appraisals of facility detectors include a large dual NaI(Tl) coincidence system, three smaller NaI(Tl) detectors, and HPGe well detecotr, and gas proportional and Geiger counters. Major electronics for the detectors are located at a ground level control center to eliminate any associated backgrounds. Because an individual sample may be counted several days, uninterruptable power is used. An IBM PC/XT computer processes spectra from multi-channel analyzers using custom-developed software. 25 refs., 15 figs., 7 tabs.
Estimating low-density snowshoe hare populations using fecal pellet counts
Estimating low-density snowshoe hare populations using fecal pellet counts Dennis L. Murray, James americanus) populations found at high densities can be estimated using fecal pellet densities on rectangular of fecal pellet plots for estimating hare populations by correlating pellet densities with estimated hare
ASSESSMENT OF POTENTIAL BIAS WITH SNOWSHOE HARE FECAL PELLET-PLOT COUNTS
385 ASSESSMENT OF POTENTIAL BIAS WITH SNOWSHOE HARE FECAL PELLET-PLOT COUNTS DENNIS MURRAY, 1 National Forest, Coeur d'Alene, ID 83815, USA Abstract: The fecal pellet-plot method has been used biases associated with the technique have not been addressed ade- quately. We studied hare pellet
PELLET COUNT INDICES COMPARED TO MARKRECAPTURE ESTIMATES FOR EVALUATING SNOWSHOE HARE DENSITY
PELLET COUNT INDICES COMPARED TO MARKRECAPTURE ESTIMATES FOR EVALUATING SNOWSHOE HARE DENSITY L in the contiguous United States. Efforts to evalu- ate hare densities using pellets have traditionally been based there was concordance between pellet-based predictions and markrecapture density estimates of hares. We developed local
ADtrees for Sequential Data and N-gram Counting Rob Van Dam and Dan Ventura
Martinez, Tony R.
ADtrees for Sequential Data and N-gram Counting Rob Van Dam and Dan Ventura Abstract-- We consider Ventura are with the Department of Com- puter Science, Brigham Young University, Provo, UT 84602 (email: rvan- dam00@gmail.com, ventura@cs.byu.edu) the best smoothing techniques utilize some (often linear
Ragland, J. Derrick
2013-08-09T23:59:59.000Z
A Study Of Texas Youth Livestock Exhibitors Knowledge Within The Constructs Of The Quality Counts Assessment. (August 2013) J. D. Ragland, B.S., M. S. Chairman of Advisory Committee: Dr. Steve Fraze. The purpose of this study was to examine...
solutions that count The Australian Technology Network of Universities (ATN) is a group
Curtin CASE STUdy Effective Tinnitus Treatment Improves Health Outcomes dISCIPlINE Clinical Health CREd examples of research outcomes generated by ATN member universities. They demonstrate the diversity. solutions that count 5050 #12;2 Effective Tinnitus Treatment Improves Health Outcomes 0101 ATN UNIVERSITy
Cosmology Constraints from the Weak Lensing Peak Counts and the Power Spectrum in CFHTLenS
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Liu, Jia; May, Morgan; Petri, Andrea; Haiman, Zoltan; Hui, Lam; Kratochvil, Jan M.
2015-03-01T23:59:59.000Z
Lensing peaks have been proposed as a useful statistic, containing cosmological information from non-Gaussianities that is inaccessible from traditional two-point statistics such as the power spectrum or two-point correlation functions. Here we examine constraints on cosmological parameters from weak lensing peak counts, using the publicly available data from the 154 deg2 CFHTLenS survey. We utilize a new suite of ray-tracing N-body simulations on a grid of 91 cosmological models, covering broad ranges of the three parameters ?m, ?8, and w, and replicating the galaxy sky positions, redshifts, and shape noise in the CFHTLenS observations. We then build an emulator thatmore »interpolates the power spectrum and the peak counts to an accuracy of ? 5%, and compute the likelihood in the three-dimensional parameter space (?m, ?8, w) from both observables. We find that constraints from peak counts are comparable to those from the power spectrum, and somewhat tighter when different smoothing scales are combined. Neither observable can constrain w without external data. When the power spectrum and peak counts are combined, the area of the error “banana” in the (?m, ?8) plane reduces by a factor of ? two, compared to using the power spectrum alone. For a flat ? cold dark matter model, combining both statistics, we obtain the constraint ?8(?m/0.27)0.63 = 0.85+0.03-0.03.« less
Gain dispersion in Visible Light Photon Counters as a function of counting rate
Bross, A.; /Fermilab; Buscher, V.; /Freiburg U.; Estrada, J.; /Fermilab; Ginther, G.; /Rochester U.; Molina, J.; /Rio de Janeiro State U.
2005-03-01T23:59:59.000Z
We present measurements of light signals using Visible Light Photon Counters (VLPC), that indicate an increase in gain dispersion as the counting rate increases. We show that this dispersion can be understood on the basis of a recent observation of localized field reduction in VLPCs at high input rates.
Technical Bulletin A Guide to Absolute Counting Using the BD Accuri C6 Flow Cytometer
-controlled peristaltic pump system accurately monitors the sample volume pulled per run. The direct counts correlate either beads or a hemacytometer. BD CFlow® software displays the volume (in L) as data in the statistics in a data view on the BD CFlow Statistics tab. These guidelines contain recommendations, tips
Number Counts of GALEX Sources in FUV (1530A) and NUV (2310A) Bands
Bianchi, Luciana
a very wide range of UV magnitude (14 23.8). Both the FUV and NUV counts are inconsistent with a non-evolution model, while they are in good agreement with evolution models (essentially luminosity evolution) derived Institution of Washington, 813 Santa Barbara St., Pasadena, CA 91101 8 NASA/IPAC Extragalactic Database
Longterm Trends in Nest Counts of Colonial Seabirds in South Carolina, USA
Jodice, Patrick
40 Longterm Trends in Nest Counts of Colonial Seabirds in South Carolina, USA PATRICK G. R. JODICE 1 , THOMAS M. MURPHY 2 , FELICIA J. SANDERS 3 AND LISA M. FERGUSON 1 1 USGS South Carolina, Clemson, SC 29634, USA Internet: pjodice@clemson.edu 2 South Carolina Department of Natural Resources, 585
Performing fish counts with a wide-angle camera, a promising approach reducing divers' limitations
Borges, Rita
Performing fish counts with a wide-angle camera, a promising approach reducing divers' limitations Keywords: Fish surveys Underwater video Underwater visual census Wide-angle camera Visual standardised methods for census of reef fishes have long been used in fisheries management and biolog- ical surveys
Cosmology Constraints from the Weak Lensing Peak Counts and the Power Spectrum in CFHTLenS
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Liu, Jia [Department of Astronomy and Astrophysics, Columbia University, New York, NY, (United States); May, Morgan [Physics Department, Brookhaven National Laboratory, Upton, NY, (United States); Petri, Andrea [Department of Physics, Columbia University, New York, NY, (United States); Haiman, Zoltan [Department of Astronomy and Astrophysics, Columbia University, New York, NY, (United States); Institute for Strings, Cosmology, and Astroparticle Physics (ISCAP), Columbia University, New York, (United States); Hui, Lam [Department of Physics, Columbia University, New York, NY, (United States); Institute for Strings, Cosmology, and Astroparticle Physics (ISCAP), Columbia University, New York, (United States); Kratochvil, Jan M. [Astrophysics and Cosmology Research Unit, University of KwaZulu-Natal, Westville, Durban, (South Africa)
2015-03-01T23:59:59.000Z
Lensing peaks have been proposed as a useful statistic, containing cosmological information from non-Gaussianities that is inaccessible from traditional two-point statistics such as the power spectrum or two-point correlation functions. Here we examine constraints on cosmological parameters from weak lensing peak counts, using the publicly available data from the 154 deg2 CFHTLenS survey. We utilize a new suite of ray-tracing N-body simulations on a grid of 91 cosmological models, covering broad ranges of the three parameters ?m, ?8, and w, and replicating the galaxy sky positions, redshifts, and shape noise in the CFHTLenS observations. We then build an emulator that interpolates the power spectrum and the peak counts to an accuracy of ? 5%, and compute the likelihood in the three-dimensional parameter space (?m, ?8, w) from both observables. We find that constraints from peak counts are comparable to those from the power spectrum, and somewhat tighter when different smoothing scales are combined. Neither observable can constrain w without external data. When the power spectrum and peak counts are combined, the area of the error “banana” in the (?m, ?8) plane reduces by a factor of ? two, compared to using the power spectrum alone. For a flat ? cold dark matter model, combining both statistics, we obtain the constraint ?8(?m/0.27)0.63 = 0.85+0.03-0.03.
A Specific Multi-channel Photon-Counting Unit for Air-Pollution Measurement
Athens, University of
A Specific Multi-channel Photon-Counting Unit for Air-Pollution Measurement Papageorgas P.1.g. confocal microscopy), air pollution optical measurements, laser sounding of the atmosphere for the in situ quantitative monitoring of up to five air pollutants simultaneously and one calibration channel
Neutrinoless Double Beta Decay with SNO+
J. Hartnell; for the SNO+ collaboration
2012-01-30T23:59:59.000Z
SNO+ will search for neutrinoless double beta decay by loading 780 tonnes of linear alkylbenzene liquid scintillator with O(tonne) of neodymium. Using natural Nd at 0.1% loading will provide 43.7 kg of 150Nd given its 5.6% abundance and allow the experiment to reach a sensitivity to the effective neutrino mass of 100-200 meV at 90% C.L in a 3 year run. The SNO+ detector has ultra low backgrounds with 7000 tonnes of water shielding and self-shielding of the scintillator. Distillation and several other purification techniques will be used with the aim of achieving Borexino levels of backgrounds. The experiment is fully funded and data taking with light-water will commence in 2012 with scintillator data following in 2013.
Correlations and the neutrinoless double beta decay
Menendez, J.; Poves, A. [Departamento de Fisica Teorica, and IFT, UAM-CSIC, Universidad Autonoma de Madrid, 28049-Madrid (Spain); Caurier, E.; Nowacki, F. [IPHC, IN2P3-CNRS/Universite Louis Pasteur, 67037-Strasbourg (France)
2009-11-09T23:59:59.000Z
We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally on the amount of quadrupole correlations- between parent and grand daughter nuclei quenchs strongly the decay. We discuss how varies the nuclear matrix element of {sup 76}Ge decay when the wave functions of the two nuclei involved in the transition are constrained to reproduce the experimental occupancies. In the Interacting Shell Model description the value of the NME is enhanced about 15% compared to previous calculations, whereas in the QRPA the NME's are reduced by 20%-30%, thus, the discrepancies between both approaches diminish.
Double-Slit Experiments with Microwave Billiards
S. Bittner; B. Dietz; M. Miski-Oglu; P. Oria Iriarte; A. Richter; F. Schäfer
2011-07-27T23:59:59.000Z
Single and double-slit experiments are performed with two microwave billiards with the shapes of a rectangle, respectively, a quarter stadium. The classical dynamics of the former is regular, that of the latter is chaotic. Microwaves can leave the billiards via slits in the boundary, forming interference patterns on a screen. The aim is to determine the effect of the billiard dynamics on their structure. For this the development of a method for the construction of a directed wave packet by means of an array of multiple antennas was crucial. The interference patterns show a sensitive dependence not only on the billiard dynamics but also on the initial position and direction of the wave packet.
Double beta decay and neutrino mass models
Helo, J C; Ota, T; Santos, F A Pereira dos
2015-01-01T23:59:59.000Z
Neutrinoless double beta decay allows to constrain lepton number violating extensions of the standard model. If neutrinos are Majorana particles, the mass mechanism will always contribute to the decay rate, however, it is not a priori guaranteed to be the dominant contribution in all models. Here, we discuss whether the mass mechanism dominates or not from the theory point of view. We classify all possible (scalar-mediated) short-range contributions to the decay rate according to the loop level, at which the corresponding models will generate Majorana neutrino masses, and discuss the expected relative size of the different contributions to the decay rate in each class. We also work out the phenomenology of one concrete 2-loop model in which both, mass mechanism and short-range diagram, might lead to competitive contributions, in some detail.
Forty kilojoule carbon double layer capacitor
Evans, D.A. [Evans Co., East Providence, RI (United States)
1994-10-01T23:59:59.000Z
Evans was awarded a Small Business Innovation Research (SBIR) grant from the Department of the Navy to determine if carbon double layer capacitor (DLC) technology could be used as a bridge DC power source for submarine computer systems. The Navy is interested in the technology because DLCs have high power density, require no maintenance, and are free of the hazards commonly associated with batteries. The proposed work had three main objectives: First, to design a DLC power source capable of a 15 kw average discharge rate for a minimum of 100 ms. The operating voltage was to be selected by external buss connections at 15 to 120 volts. And, the unit needed to be sealed to prevent contamination and electrolyte loss. Second, to fabricate the device according to this design and third, to measure the electrical characteristics, evaluate power performance, and report the results to the Navy. This article describes the design and performance of the capacitor.
Heterotic $?$'-corrections in Double Field Theory
Oscar A. Bedoya; Diego Marques; Carmen Nunez
2014-12-15T23:59:59.000Z
We extend the generalized flux formulation of Double Field Theory to include all the first order bosonic contributions to the $\\alpha '$ expansion of the heterotic string low energy effective theory. The generalized tangent space and duality group are enhanced by $\\alpha'$ corrections, and the gauge symmetries are generated by the usual (gauged) generalized Lie derivative in the extended space. The generalized frame receives derivative corrections through the spin connection with torsion, which is incorporated as a new degree of freedom in the extended bein. We compute the generalized fluxes and find the Riemann curvature tensor with torsion as one of their components. All the four-derivative terms of the action, Bianchi identities and equations of motion are reproduced. Using this formalism, we obtain the first order $\\alpha'$ corrections to the heterotic Buscher rules. The relation of our results to alternative formulations in the literature is discussed and future research directions are outlined.
Double Shell Tank (DST) Utilities Specification
SUSIENE, W.T.
2000-04-27T23:59:59.000Z
This specification establishes the performance requirements and provides the references to the requisite codes and standards to he applied during the design of the Double-Shell Tank (DST) Utilities Subsystems that support the first phase of waste feed delivery (WFD). The DST Utilities Subsystems provide electrical power, raw/potable water, and service/instrument air to the equipment and structures used to transfer low-activity waste (LAW) and high-level waste (HLW) to designated DST staging tanks. The DST Utilities Subsystems also support the equipment and structures used to deliver blended LAW and HLW feed from these staging tanks to the River Protection Project (RPP) Privatization Contractor facility where the waste will be immobilized. This specification is intended to be the basis for new projects/installations. This specification is not intended to retroactively affect previously established project design criteria without specific direction by the program.
Double Kelvin Wave Cascade in Superfluid Helium
G. Boffetta; A. Celani; D. Dezzani; J. Laurie; S. Nazarenko
2008-10-20T23:59:59.000Z
We study the double cascade of energy and wave action in a local model of superfluid vortex filaments. The model is obtained from a truncated expansion of the 2D Local Induction Approximation and it is shown to support six-wave interactions. We argue that, because of the uncertainty in the vortex core profile, this model has the same status of validity as the traditionally used Biot-Savart model with cutoff, but it has advantage of being much simpler. Our minimal model leads to a wave kinetic equation for which we predict existence of two distinct power-law scaling in the spectrum, corresponding to a direct cascade of energy and an inverse one of wave action. Direct numerical simulations confirm the theoretical predictions in the weak turbulence regime.
Neutrinoless Double Beta Decay in Gauge Theories
J. D. Vergados
1999-07-12T23:59:59.000Z
Neutrinoless double beta decay is a very important process both from the particle and nuclear physics point of view. Its observation will severely constrain the existing models and signal that the neutrinos are massive Majorana particles. From the elementary particle point of view it pops up in almost every model. In addition to the traditional mechanisms, like the neutrino mass, the admixture of right handed currents etc, it may occur due to the R-parity violating supersymmetric (SUSY) interactions. From the nuclear physics point of view it is challenging, because: 1) The relevant nuclei have complicated nuclear structure. 2) The energetically allowed transitions are exhaust a small part of all the strength. 3) One must cope with the short distance behavior of the transition operators, especially when the intermediate particles are heavy (eg in SUSY models). Thus novel effects, like the double beta decay of pions in flight between nucleons, have to be considered. 4) The intermediate momenta involved are about 100 MeV. Thus one has to take into account possible momentum dependent terms in the nucleon current. We find that, for the mass mechanism, such modifications of the nucleon current for light neutrinos reduce the nuclear matrix elements by about 25 per cent, almost regardless of the nuclear model. In the case of heavy neutrinos the effect is much larger and model dependent. Taking the above effects into account, the available nuclear matrix elements for the experimentally interesting nuclei A = 76, 82, 96, 100, 116, 128, 130, 136 and 150 and the experimental limits on the life times we have extracted new stringent limits on the average neutrino mass and on the R-parity violating coupling for various SUSY models.
Ultra-clean underground counting facility for low-level environmental samples
Winn, W.G.; Bowman, W.W.; Boni, A.L.
1986-01-01T23:59:59.000Z
An underground counting facility with cleanroom environment has been designed and constructed to improve detection of low-level radioisotopes in the environment. The 3.0 m x 4.3 m x 2.4 m counting chamber is placed 14.3 m below ground, has 10.2-cm thick walls of pre-WWII naval armor plate, and is further shielded by a minimum of 1.2 m of specular hematite. The total overburden of shielding is equivalent to 31.7 m of water. Careful selection of building materials and a special air filtering system maintain a cleanroom environment with minimum contamination potential. Background improvements are noted relative to an earlier ground-level counting chamber with 30.5-cm-thick walls of pre-WWII naval armor plate. The gamma background continuum is reduced by a factor of 3 to 4 in the region of 0 to 10 MeV. A minimum of 10.2 cm of low-background lead around the detector optimizes this factor at 4 to 6. Discrete gammas from airborne natural radon daughters are eliminated by controlling the air near the detectors. Detectors constructed with low-level materials will further realize the improvements in background. A constant background is required for long counts of low-level samples, and the underground detectors are well shielded against surface operations. Performance appraisals of facility detectors include a large dual NaI(Tl) coincidence system, three smaller NaI(Tl) detectors, an HPGe well detector, and gas proportional and geiger counters. Major electronics for the detectors are located at a ground level control center to eliminate any associated backgrounds. Because an individual sample may be counted several days, uninterruptable power is used. An IBM PC/XT computer processes spectra from multichannel analyzers using custom-developed software.
A faster implementation of the pivot algorithm for self-avoiding walks
Tom Kennedy
2001-09-17T23:59:59.000Z
The pivot algorithm is a Markov Chain Monte Carlo algorithm for simulating the self-avoiding walk. At each iteration a pivot which produces a global change in the walk is proposed. If the resulting walk is self-avoiding, the new walk is accepted; otherwise, it is rejected. Past implementations of the algorithm required a time O(N) per accepted pivot, where N is the number of steps in the walk. We show how to implement the algorithm so that the time required per accepted pivot is O(N^q) with q<1. We estimate that q is less than 0.57 in two dimensions, and less than 0.85 in three dimensions. Corrections to the O(N^q) make an accurate estimate of q impossible. They also imply that the asymptotic behavior of O(N^q) cannot be seen for walk lengths which can be simulated. In simulations the effective q is around 0.7 in two dimensions and 0.9 in three dimensions. Comparisons with simulations that use the standard implementation of the pivot algorithm using a hash table indicate that our implementation is faster by as much as a factor of 80 in two dimensions and as much as a factor of 7 in three dimensions. Our method does not require the use of a hash table and should also be applicable to the pivot algorithm for off-lattice models.
Environmental Education in Brazil: Preventive Measures to Avoid Contamination with U and Th
Silva Pastura, Valeria Fonseca da [Comissao Nacional de Energia Nuclear (CNEN) Rua General Severiano, 90, RJ de Energia Nuclear (CNEN) (Brazil); Wieland, Patricia [Pontificia Universidade Catolica do Rio de Janeiro (PUC-RJ), Dept. Eng. Ind., RJ (Brazil)
2008-08-07T23:59:59.000Z
Aiming at increasing awareness of radiation health effects, environmental issues and preventive measures, the Nuclear Energy National Commission (CNEN) launched in 2004 an education and public outreach programme for mine workers, students, teachers, governmental leaders, labor representatives and members of communities nearby small mining sites at the North and Northeast regions. Many Brazilian conventional mines present a significant risk of exposure to radiation due to Uranium and Thorium. CNEN inspects the mines but there are several small mining sites dedicated to open pit short term mineral extraction, called 'garimpagem', that are of difficult control. Therefore, information at large about preventive measures to avoid contamination during exploration, transportation and storage is necessary. CNEN developed an educational campaign which includes a series of open seminars, talks, folders, booklets and posters. The objective of this paper is to present the Brazilian educational campaign to avoid contamination risks at those small mineral exploration sites and its results. This campaign is a joint task that receives collaboration of other organizations such as federal police, schools and universities.
Significant neutrinoless double beta decay with quasi-Dirac neutrinos
Pei-Hong Gu
2012-09-13T23:59:59.000Z
A significant signal of neutrinoless double beta decay can be consistent with the existence of light quasi-Dirac neutrinos. To demonstrate this possibility, we consider a realistic model where the neutrino masses and the neutrinoless double beta decay can be simultaneously generated after a Peccei-Quinn symmetry breaking.
technology offer HPC/UHPC double wall elements
Arnold, Anton
buildings and towers like wind turbines, power plants or cooling towers. Fig. 1: UHPC double wall element to 20-45 mm in an easy and cost efficient way. Background Double wall elements are precast reinforced · Savings in material and weight · Savings in transport and crane costs · Dense structure of the precast
An improved selective excitation double Mossbauer spectrometer J. van Lieropa)
Ryan, Dominic
An improved selective excitation double Mo¨ssbauer spectrometer J. van Lieropa) and D. H. Ryan, operation and performance of a selective excitation double Mo¨ssbauer SEDM spectrometer are described circuitry together with Wissel Mo¨ssbauer velocity transducers and electronics supplies energy
Matched slow pulses using double electromagnetically induced transparency
Lvovsky, Alexander
Matched slow pulses using double electromagnetically induced transparency Andrew MacRae,* Geoff, 2008 We implement double electromagnetically induced transparency (DEIT) in rubidium vapor using Optical Society of America OCIS codes: 270.1670, 270.5585, 190.5530. Electromagnetically induced
Support of Evidence for Neutrinoless Double Beta Decay
H. V. Klapdor-Kleingrothaus; A. Dietz; I. V. Krivosheina; Ch. Doerr; C. Tomei
2003-12-12T23:59:59.000Z
Indirect support for the evidence of neutrinoless double beta decay reported recently, is obtained by analysis of other Ge double beta experiments, which yield independent information on the background in the region of Q_(beta-beta). Some statistical features as well as background simulations with GEANT 4 of the HEIDELBERG-MOSCOW experiment are discussed which disprove recent criticism.
One Year of Evidence for Neutrinoless Double Beta Decay
H. V. Klapdor-Kleingrothaus
2003-02-26T23:59:59.000Z
The present experimental status in the search for neutrinoless double beta decay is reviewed, with emphasis on the first indication for neutrinoless double beta decay found in the HEIDELBERG-MOSCOW experiment, giving first evidence for lepton number violation and a Majorana nature of the neutrinos. Future perspectives of the field are briefly outlined.
The avoidance of a previously neutral stimulus paired with frustrative nonreward
Beard, William Washington
1975-01-01T23:59:59.000Z
- perimental and control Ss. A simple t test comparison revealed that there were no significant differences be- tween mean running speeds (t=. 3346, df=59, 2(. 05). Al- though the control Ss ran slightly faster than the ex- perimental Ss, XF=2. 947, X0=2... speeds in second runway of the double runway apparatus during Phase II. 31 trials were also much faster than control Ss' times on both designated reward and nonreward trials. Results of a 2 X 2 analysis of variance are shown in able The significant...
Fominov, Yakov
and noise in ballistic graphene flakes.911 Recent advances in preparation and transport stud- iesFull counting statistics in disordered graphene at the Dirac point: From ballistics to diffusion A; published 12 August 2010 The full counting statistics of the charge transport through an undoped graphene
Development of a PCI Express Based Readout Electronics for the XPAD3 X-Ray Photon Counting Image
Dawiec, A; Breugnon, P; Arnaud, K; Duval, P -Y; Godiot, S; Hustache, S; Medjoubi, K; Berar, J -F; Boudet, N; Morel, C; Bompard, F
2011-01-01T23:59:59.000Z
XPAD3 is a large surface X-ray photon counting imager with high count rates, large counter dynamics and very fast data readout. Data are readout in parallel by a PCI Express interface using DMA transfer. The readout frame rate of the complete detector comprising 0.5 MPixels amounts to 500 images per second without dead-time.
A New Technique for Studying the Fano Factor And the Mean Energy Per Ion Pair in Counting Gases
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Panksky, A.; Breskin, A.; Chechik, R.
1996-04-01T23:59:59.000Z
A new method is presented for deriving the Fano factor and the mean energy per ion pair in the ultrasoft x-ray energy range. It is based on counting electrons deposited by a photon in a low-pressure gas, and is applicable for all counting gases. The energy dependence of these parameters for several hydrocarbons and gas mixtures is presented.
arXiv:cond-mat/0301277v115Jan2003 RESONANT COOPER-PAIR TUNNELING: COUNTING STATISTICS
Clerk, Aashish
in the current noise was predicted at the Josephson energy. In this paper, we look specifically at the statisticsarXiv:cond-mat/0301277v115Jan2003 RESONANT COOPER-PAIR TUNNELING: COUNTING STATISTICS AND FREQUENCY Haven, CT 06520-8284 Abstract We discuss the counting statistics and current noise associated
Mukamel, Shaul
Entropy fluctuation theorems in driven open systems: Application to electron counting statistics systems exchanging energy and matter with multiple reservoirs and described by a master equation cases. We show how these FTs can be experimentally tested by performing the counting statistics
Finnerty, P.; Aguayo, Estanislao; Amman, M.; Avignone, Frank T.; Barabash, Alexander S.; Barton, P. J.; Beene, Jim; Bertrand, F.; Boswell, M.; Brudanin, V.; Busch, Matthew; Chan, Yuen-Dat; Christofferson, Cabot-Ann; Collar, J. I.; Combs, Dustin C.; Cooper, R. J.; Detwiler, Jason A.; Doe, P. J.; Efremenko, Yuri; Egorov, Viatcheslav; Ejiri, H.; Elliott, S. R.; Esterline, James H.; Fast, James E.; Fields, N.; Fraenkle, Florian; Galindo-Uribarri, A.; Gehman, Victor M.; Giovanetti, G. K.; Green, M.; Guiseppe, Vincente; Gusey, K.; Hallin, A. L.; Hazama, R.; Henning, Reyco; Hoppe, Eric W.; Horton, Mark; Howard, Stanley; Howe, M. A.; Johnson, R. A.; Keeter, K.; Kidd, M. F.; Knecht, A.; Kochetov, Oleg; Konovalov, S.; Kouzes, Richard T.; LaFerriere, Brian D.; Leon, Jonathan D.; Leviner, L.; Loach, J. C.; Looker, Q.; Luke, P.; MacMullin, S.; Marino, Michael G.; Martin, R. D.; Merriman, Jason H.; Miller, M. L.; Mizouni, Leila; Nomachi, Masaharu; Orrell, John L.; Overman, Nicole R.; Perumpilly, Gopakumar; Phillips, David; Poon, Alan; Radford, D. C.; Rielage, Keith; Robertson, R. G. H.; Ronquest, M. C.; Schubert, Alexis G.; Shima, T.; Shirchenko, M.; Snavely, Kyle J.; Steele, David; Strain, J.; Timkin, V.; Tornow, Werner; Varner, R. L.; Vetter, Kai; Vorren, Kris R.; Wilkerson, J. F.; Yakushev, E.; Yaver, Harold; Young, A.; Yu, Chang-Hong; Yumatov, Vladimir
2014-03-24T23:59:59.000Z
The Majorana Demonstrator will search for the neutrinoless double-beta decay (0*) of the 76Ge isotope with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own anti-particle, demonstrate that lepton number is not conserved, and provide information on the absolute mass-scale of the neutrino. The Demonstrator is being assembled at the 4850 foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be contained in a lowbackground environment and surrounded by passive and active shielding. The goals for the Demonstrator are: demonstrating a background rate less than 3 counts tonne -1 year-1 in the 4 keV region of interest (ROI) surrounding the 2039 keV 76Ge endpoint energy; establishing the technology required to build a tonne-scale germanium based double-beta decay experiment; testing the recent claim of observation of 0; and performing a direct search for lightWIMPs (3-10 GeV/c2).
Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment
S. Cebrián; J. Pérez; I. Bandac; L. Labarga; V. Álvarez; A. I. Barrado; A. Bettini; F. I. G. M. Borges; M. Camargo; S. Cárcel; A. Cervera; C. A. N. Conde; E. Conde; T. Dafni; J. Díaz; R. Esteve; L. M. P. Fernandes; M. Fernández; P. Ferrario; A. L. Ferreira; E. D. C. Freitas; V. M. Gehman; A. Goldschmidt; J. J. Gómez-Cadenas; D. González-Díaz; R. M. Gutiérrez; J. Hauptman; J. A. Hernando Morata; D. C. Herrera; I. G. Irastorza; A. Laing; I. Liubarsky; N. López-March; D. Lorca; M. Losada; G. Luzón; A. Marí; J. Martín-Albo; A. Martínez; G. Martínez-Lema; T. Miller; F. Monrabal; M. Monserrate; C. M. B. Monteiro; F. J. Mora; L. M. Moutinho; J. Muñoz Vidal; M. Nebot-Guinot; D. Nygren; C. A. B. Oliveira; A. Ortiz de Solórzano; J. L. Pérez Aparicio; M. Querol; J. Renner; L. Ripoll; J. Rodríguez; F. P. Santos; J. M. F. dos Santos; L. Serra; D. Shuman; A. Simón; C. Sofka; M. Sorel; J. F. Toledo; J. Torrent; Z. Tsamalaidze; J. F. C. A. Veloso; J. A. Villar; R. C. Webb; J. T. White; N. Yahlali
2015-06-15T23:59:59.000Z
The Neutrino Experiment with a Xenon Time-Projection Chamber (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds; therefore, an extensive screening and selection process is underway to control the radiopurity levels of the materials to be used in the experimental set-up of NEXT. The detector design combines the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. Separate energy and tracking readout planes are based on different sensors: photomultiplier tubes for calorimetry and silicon multi-pixel photon counters for tracking. The design of a radiopure tracking plane, in direct contact with the gas detector medium, was specially challenging since the needed components like printed circuit boards, connectors, sensors or capacitors have typically, according to available information in databases and in the literature, activities too large for experiments requiring ultra-low background conditions. Here, the radiopurity assessment of tracking readout components based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterraneo de Canfranc (Spain) is described. According to the obtained results, radiopure enough printed circuit boards made of kapton and copper, silicon photomultipliers and other required components, fulfilling the requirement of an overall background level in the region of interest of at most 8 10-4 counts keV-1 kg-1 y-1, have been identified.
Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment
V. Álvarez; I. Bandac; A. I. Barrado; A. Bettini; F. I. G. M. Borges; M. Camargo; S. Cárcel; S. Cebrián; A. Cervera; C. A. N. Conde; E. Conde; T. Dafni; J. Díaz; R. Esteve; L. M. P. Fernandes; M. Fernández; P. Ferrario; A. L. Ferreira; E. D. C. Freitas; V. M. Gehman; A. Goldschmidt; H. Gómez; J. J. Gómez-Cadenas; D. González-Díaz; R. M. Gutiérrez; J. Hauptman; J. A. Hernando Morata; D. C. Herrera; F. J. Iguaz; I. G. Irastorza; L. Labarga; A. Laing; I. Liubarsky; D. Lorca; M. Losada; G. Luzón; A. Marí; J. Martín-Albo; A. Martínez; G. Martínez-Lema; T. Miller; F. Monrabal; M. Monserrate; C. M. B. Monteiro; F. J. Mora; L. M. Moutinho; J. Muñoz Vidal; M. Nebot-Guinot; D. Nygren; C. A. B. Oliveira; A. Ortiz de Solórzano; J. Pérez; J. L. Pérez Aparicio; J. Renner; L. Ripoll; A. Rodríguez; J. Rodríguez; F. P. Santos; J. M. F. dos Santos; L. Segui; L. Serra; D. Shuman; A. Simón; C. Sofka; M. Sorel; J. F. Toledo; J. Torrent; Z. Tsamalaidze; J. F. C. A. Veloso; J. A. Villar; R. C. Webb; J. T. White; N. Yahlali
2014-11-05T23:59:59.000Z
The 'Neutrino Experiment with a Xenon Time-Projection Chamber' (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds; therefore, an extensive screening and selection process is underway to control the radiopurity levels of the materials to be used in the experimental set-up of NEXT. The detector design combines the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. Separate energy and tracking readout planes are based on different sensors: photomultiplier tubes for calorimetry and silicon multi-pixel photon counters for tracking. The design of a radiopure tracking plane, in direct contact with the gas detector medium, was a challenge since the needed components have typically activities too large for experiments requiring ultra-low background conditions. Here, the radiopurity assessment of tracking readout components based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterraneo de Canfranc (Spain) is described. According to the obtained results, radiopure enough printed circuit boards made of kapton and copper and silicon photomultipliers, fulfilling the requirements of an overall background level in that region of at most 8 x 10-4 counts keV-1 kg-1 y-1, have been identified.
First results on neutrinoless double beta decay of Te-130 with the calorimetric cuoricino experiment
2003-01-01T23:59:59.000Z
Results on Neutrinoless Double Beta Decay of 130 Te with theEvidence for Neutrinoless Double Beta Decay” arXiv:hep-on “Evidence for neutrinoless double beta decay”- arXiv:hep-
Triple Differential Cross sections and Nuclear Recoil in Two-Photon Double Ionization of Helium
Horner, Daniel A.
2008-01-01T23:59:59.000Z
Two-Photon Double Ionization of Helium D. A. Horner, 1 C. W.photon double ionization of helium are calculated using theDouble ionization of the helium atom by two XUV photons in
Cross sections for short pulse single and double ionization of helium
Palacios, Alicia; Rescigno, Thomas N.; McCurdy, C. William
2008-01-01T23:59:59.000Z
ton double ionization of helium at 20 eV above threshold. 1single and double ionization of helium A. Palacios, 1 T. N.double ionization of helium. In particular it is shown how
An Investigation and Characterization of Metal Foam Filled Double-Pipe Heat Exchangers
Chen, Xi
2014-01-01T23:59:59.000Z
a metal foam filled double-pipe heat exchanger: a) Pressurein a metal foam filled double-pipe heat exchanger witha plain double-pipe heat exchanger: a) Total heat transfer
Classifying and avoiding singularities in the alternative gravity dark energy models
Capozziello, S; Nojiri, S; Odintsov, S D
2009-01-01T23:59:59.000Z
The future finite-time singularities emerging in alternative gravity dark energy models are classified and studied in Jordan and Einstein frames. It is shown that such singularity may occur even in flat spacetime for the specific choice of the effective potential. The conditions for the avoidance of finite-time singularities are presented and discussed. The problem is reduced to the study of a scalar field evolving on an effective potential by using the conformal transformations. Some viable modified gravity models are analyzed in detail and the way to cure singularity is considered by introducing the higher-order curvature corrections. These results maybe relevant for the resolution of the conjectured problem in the relativistic star formation in such modified gravity where finite-time singularity is also manifested.
Classifying and avoiding singularities in the alternative gravity dark energy models
S. Capozziello; M. De Laurentis; S. Nojiri; S. D. Odintsov
2009-06-30T23:59:59.000Z
The future finite-time singularities emerging in alternative gravity dark energy models are classified and studied in Jordan and Einstein frames. It is shown that such singularity may occur even in flat spacetime for the specific choice of the effective potential. The conditions for the avoidance of finite-time singularities are presented and discussed. The problem is reduced to the study of a scalar field evolving on an effective potential by using the conformal transformations. Some viable modified gravity models are analyzed in detail and the way to cure singularity is considered by introducing the higher-order curvature corrections. These results maybe relevant for the resolution of the conjectured problem in the relativistic star formation in such modified gravity where finite-time singularity is also manifested.
Avoiding superluminal propagation of higher spin waves via projectors onto W^2 invariant subspaces
Napsuciale, M; Napsuciale, Mauro; Kirchbach, Mariana
2003-01-01T23:59:59.000Z
We propose to describe higher spins as invariant subspaces of the squared Pauli-Lubanski operator, W^2, in a properly chosen representation, \\psi(p) (in momentum space), of the Homogeneous Lorentz Group. The resulting equation of motion for any field with s>=1 is then just PROY^{s}(p)\\psi(p)=\\psi(p), with PROY^{s}(p) being the respective covariant projector. We couple minimally electromagnetism to the above equation and show that for all representations which do not contain an s=0 sector, the corresponding wave fronts of the classical solutions propagate causally. The advocated method allows to describe all higher spins by covariant matrix equations of the dimensionality of the representation considered and which are only quadratic in the momenta. It avoids the Velo-Zwanziger problem of superluminal propagation of higher spin waves and points toward a consistent description of higher spin quantum fields.
Conformal invariance predictions for the three-dimensional self-avoiding walk
Tom Kennedy
2014-12-23T23:59:59.000Z
If the three dimensional self-avoiding walk (SAW) is conformally invariant, then one can compute the hitting densities for the SAW in a half-space and in a sphere. The ensembles of SAW's used to define these hitting densities involve walks of arbitrary lengths, and so these ensembles cannot be directly studied by the pivot Monte Carlo algorithm for the SAW. We show that these mixed length ensembles should have the same scaling limit as certain weighted ensembles that only involve walks with a single length, thus providing a fast method for simulating these ensembles. Preliminary simulations which found good agreement between the predictions and Monte Carlo simulations for the SAW were reported in [14]. In this paper we present more accurate simulations testing the predictions and find even stronger support for the prediction that the SAW is conformally invariant in three dimensions.
Mueller, Robert P. (BATTELLE (PACIFIC NW LAB)); Neitzel, Duane A. (BATTELLE (PACIFIC NW LAB)); Amidan, Brett G. (BATTELLE (PACIFIC NW LAB))
2001-12-01T23:59:59.000Z
Laboratory tests were conducted using juvenile chinook salmon Oncorhynchus tshawytscha, brook trout Salvelinus fontinalis, and rainbow trout O. mykiss to determine specific behavior responses to infrasound (< 20 Hz) and flashing strobe lights. The objective of these tests was to determine if juvenile salmonids could be deterred from entrainment at water diversion structures. Caged fish were acclimated in a static test tank and their behavior was recorded using low light cameras. Species-specific behavior was characterized by measuring movements of the fish within the cage and by observing startle and habituation responses. Wild chinook salmon (40-45 mm TL) and hatchery reared chinook salmon (45-50 mm TL) exhibited avoidance responses when initially exposed to a 10-Hz volume displacement source of infrasound. Rainbow and eastern brook trout (25-100 mm TL) did not respond with avoidance or other behaviors to infrasound. Evidence of habituation to the infrasound source was evident for chinook salmon during repeated exposures. Wild and hatchery chinook displayed a higher proportion of movement during the initial exposures to infrasound when the acclimation period in the test tank was 2-3 h as compared to a 12-15 h acclimation period. A flashing strobe light produced consistent movement in wild chinook salmon (60% of the tests), hatchery reared chinook salmon (50%), and rainbow trout (80%). No measurable responses were observed for brook trout. Results indicate that consistent, repeatable responses can be elicited from some fish using high-intensity strobe lights under a controlled laboratory testing. The species specific behaviors observed in these experiments might be used to predict how fish might react to low-frequency sound and strobe lights in a screening facility.
Pionic contribution to neutrinoless double beta decay
Vergados, J. D. [Physics Department, University of Ioannina, Ioannina, GR 451 10 (Greece); Theory Division, CERN, Geneva (Switzerland); Faessler, Amand [Institute fuer Theoretische Physik, Universitaet Tuebingen (Germany); Toki, H. [RCNP, Osaka University, Osaka, 567-0047 (Japan)
2010-02-01T23:59:59.000Z
It is well known that neutrinoless double decay is going to play a crucial role in settling the neutrino properties, which cannot be extracted from the neutrino oscillation data. It is, in particular, expected to settle the absolute scale of neutrino mass and determine whether the neutrinos are Majorana particles, i.e. they coincide with their own antiparticles. In order to extract the average neutrino mass from the data, one must be able to estimate the contribution of all possible high mass intermediate particles. The latter, which occur in practically all extensions of the standard model, can, in principle, be differentiated from the usual mass term, if data from various targets are available. One, however, must first be able to reliably calculate the corresponding nuclear matrix elements. Such calculations are extremely difficult since the effective transition operators are very short ranged. For such operators processes like pionic contributions, which are usually negligible, turn out to be dominant. We study such an effect in a nonrelativistic quark model for the pion and the nucleon.
Double-duct liquid metal magnetohydrodynamic engine
Haaland, Carsten M. (Oak Ridge, TN)
1997-01-01T23:59:59.000Z
An internal combustion, liquid metal (LM) magnetohydrodynamic (MHD) engine and an alternating current (AC) magnetohydrodynamic generator, are used in combination to provide useful AC electric energy output. The engine design has four pistons and a double duct configuration, with each duct containing sodium potassium liquid metal confined between free pistons located at either end of the duct. The liquid metal is forced to flow back and forth in the duct by the movement of the pistons, which are alternatively driven by an internal combustion process. In the MHD generator, the two LM-MHD ducts pass in close proximity through a Hartmann duct with output transformer. AC power is produced by operating the engine with the liquid metal in the two generator ducts always flowing in counter directions. The amount of liquid metal maintained in the ducts may be varied. This provides a variable stroke length for the pistons. The engine/generator provides variable AC power at variable frequencies that correspond to the power demands of the vehicular propulsion. Also the engine should maintain nearly constant efficiency throughout the range of power usage. Automobiles and trucks could be powered by the invention, with no transmission or power converter devices being required.
Double-duct liquid metal magnetohydrodynamic engine
Haaland, Carsten M. (Oak Ridge, TN)
1995-01-01T23:59:59.000Z
An internal combustion, liquid metal (LM) magnetohydrodynamic (MHD) engine and an alternating current (AC) magnetohydrodynamic generator, are used in combination to provide useful AC electric energy output. The engine design has-four pistons and a double duct configuration, with each duct containing sodium potassium liquid metal confined between free pistons located at either end of the duct. The liquid metal is forced to flow back and forth in the duct by the movement of the pistons, which are alternatively driven by an internal combustion process. In the MHD generator, the two LM-MHD ducts pass in close proximity through a Hartmann duct with output transformer. AC power is produced by operating the engine with the liquid metal in the two generator ducts always flowing in counter directions. The amount of liquid metal maintained in the ducts may be varied. This provides a variable stroke length for the pistons. The engine/generator provides variable AC power at variable frequencies that correspond to the power demands of the vehicular propulsion. Also the engine should maintain nearly constant efficiency throughout the range of power usage. Automobiles and trucks could be powered by the invention, with no transmission or power converter devices being required.
Integrated reservoir management doubles Nigerian field reserves
Akinlawon, Y.; Nwosu, T.; Satter, A.; Jespersen, R.
1996-10-01T23:59:59.000Z
An integrated alliance across disciplines, companies and countries enabled Texaco to conduct a comprehensive reservoir analysis of the North Apoi/Funiwa field in Nigeria. Recommendations implemented in 3 months doubled the book reserves of this mature field. The paper discusses the objectives, the integration of organizations, reservoir analysis, and conclusions. The conclusions made from the integrated study are: (1) 3-D seismic data dramatically improved reservoir description. (2) OOIP is considerably more than the booked values and reserves additions are substantial. (3) Significant value has been added to TOPCON`s assets as a result of teamwork and a multidisciplinary approach to evaluating the reservoirs and optimizing the scenarios for reservoir management. (4) Teamwork and integration of professionals, data, technology and tools was critical to the projects success. (5) The study set an example for effective and expeditious technology transfer and applications. (6) Partnering of TOPCON, DPR, NAPIMS, EPTD and SSI resulted in a quick cycle time and set an excellent example of integration and alliance.
Moisture corrections in neutron coincidence counting of PuO/sub 2/
Stewart, J.E.; Menlove, H.O.
1987-01-01T23:59:59.000Z
Passive neutron coincidence counting is capable of 1% assay accuracy for pure, well-characterized PuO/sub 2/ samples that contain plutonium masses from a few tens of grams to several kilograms. Moisture in the sample can significantly bias the assay high by changing the (..cap alpha..,n) neutron production, the sample multiplication, and the detection efficiency. Monte Carlo calculations and an analytical model of coincidence counting have been used to quantify the individual and cumulative effects of moisture biases for two PuO/sub 2/ sample sizes and a range of moisture levels from 0 to 9 wt %. Results of the calculations suggest a simple correction procedure for moisture bias that is effective from 0 to 3 wt % H/sub 2/O. The procedure requires that the moisture level in the sample be known before the coincidence measurement.
Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
Ade, P A R; Arnaud, M; Ashdown, M; Aumont, J; Baccigalupi, C; Banday, A J; Barreiro, R B; Bartlett, J G; Bartolo, N; Battaner, E; Battye, R; Benabed, K; Benoît, A; Benoit-Lévy, A; Bernard, J -P; Bersanelli, M; Bielewicz, P; Bonaldi, A; Bonavera, L; Bond, J R; Borrill, J; Bouchet, F R; Bucher, M; Burigana, C; Butler, R C; Calabrese, E; Cardoso, J -F; Catalano, A; Challinor, A; Chamballu, A; Chary, R -R; Chiang, H C; Christensen, P R; Church, S; Clements, D L; Colombi, S; Colombo, L P L; Combet, C; Comis, B; Couchot, F; Coulais, A; Crill, B P; Curto, A; Cuttaia, F; Danese, L; Davies, R D; Davis, R J; de Bernardis, P; de Rosa, A; de Zotti, G; Delabrouille, J; Désert, F -X; Diego, J M; Dolag, K; Dole, H; Donzelli, S; Doré, O; Douspis, M; Ducout, A; Dupac, X; Efstathiou, G; Elsner, F; Enßlin, T A; Eriksen, H K; Falgarone, E; Fergusson, J; Finelli, F; Forni, O; Frailis, M; Fraisse, A A; Franceschi, E; Frejsel, A; Galeotta, S; Galli, S; Ganga, K; Giard, M; Giraud-Héraud, Y; Gjerløw, E; González-Nuevo, J; Górski, K M; Gratton, S; Gregorio, A; Gruppuso, A; Gudmundsson, J E; Hansen, F K; Hanson, D; Harrison, D L; Henrot-Versillé, S; Hernández-Monteagudo, C; Herranz, D; Hildebrandt, S R; Hivon, E; Hobson, M; Holmes, W A; Hornstrup, A; Hovest, W; Huffenberger, K M; Hurier, G; Jaffe, A H; Jaffe, T R; Jones, W C; Juvela, M; Keihänen, E; Keskitalo, R; Kisner, T S; Kneissl, R; Knoche, J; Kunz, M; Kurki-Suonio, H; Lagache, G; Lähteenmäki, A; Lamarre, J -M; Lasenby, A; Lattanzi, M; Lawrence, C R; Leonardi, R; Lesgourgues, J; Levrier, F; Liguori, M; Lilje, P B; Linden-Vørnle, M; López-Caniego, M; Lubin, P M; Macías-Pérez, J F; Maggio, G; Maino, D; Mandolesi, N; Mangilli, A; Martin, P G; Martínez-González, E; Masi, S; Matarrese, S; Mazzotta, P; McGehee, P; Meinhold, P R; Melchiorri, A; Melin, J -B; Mendes, L; Mennella, A; Migliaccio, M; Mitra, S; Miville-Deschênes, M -A; Moneti, A; Montier, L; Morgante, G; Mortlock, D; Moss, A; Munshi, D; Murphy, J A; Naselsky, P; Nati, F; Natoli, P; Netterfield, C B; Nørgaard-Nielsen, H U; Noviello, F; Novikov, D; Novikov, I; Oxborrow, C A; Paci, F; Pagano, L; Pajot, F; Paoletti, D; Partridge, B; Pasian, F; Patanchon, G; Pearson, T J; Perdereau, O; Perotto, L; Perrotta, F; Pettorino, V; Piacentini, F; Piat, M; Pierpaoli, E; Pietrobon, D; Plaszczynski, S; Pointecouteau, E; Polenta, G; Popa, L; Pratt, G W; Prézeau, G; Prunet, S; Puget, J -L; Rachen, J P; Rebolo, R; Reinecke, M; Remazeilles, M; Renault, C; Renzi, A; Ristorcelli, I; Rocha, G; Roman, M; Rosset, C; Rossetti, M; Roudier, G; Rubiño-Martín, J A; Rusholme, B; Sandri, M; Santos, D; Savelainen, M; Savini, G; Scott, D; Seiffert, M D; Shellard, E P S; Spencer, L D; Stolyarov, V; Stompor, R; Sudiwala, R; Sunyaev, R; Sutton, D; Suur-Uski, A -S; Sygnet, J -F; Tauber, J A; Terenzi, L; Toffolatti, L; Tomasi, M; Tristram, M; Tucci, M; Tuovinen, J; Türler, M; Umana, G; Valenziano, L; Valiviita, J; Van Tent, B; Vielva, P; Villa, F; Wade, L A; Wandelt, B D; Wehus, I K; Weller, J; White, S D M; Yvon, D; Zacchei, A; Zonca, A
2015-01-01T23:59:59.000Z
We present cluster counts and corresponding cosmological constraints from the Planck full mission data set. Our catalogue consists of 439 clusters detected via their Sunyaev-Zeldovich (SZ) signal down to a signal-to-noise of six, and is more than a factor of two larger than the 2013 Planck cluster cosmology sample. The counts are consistent with those from 2013 and yield compatible constraints under the same modelling assumptions. Taking advantage of the larger catalogue, we extend our analysis to the two-dimensional distribution in redshift and signal-to-noise. We use mass estimates from two recent studies of gravitational lensing of background galaxies by Planck clusters to provide priors on the hydrostatic bias parameter, $1-b$. In addition, we use lensing of cosmic microwave background (CMB) temperature fluctuations by Planck clusters as a third independent constraint on this parameter. These various calibrations imply constraints on the present-day amplitude of matter fluctuations in varying degrees of t...
Do PageRank-based author rankings outperform simple citation counts?
Fiala, Dalibor; Žitnik, Slavko; Bajec, Marko
2015-01-01T23:59:59.000Z
The basic indicators of a researcher's productivity and impact are still the number of publications and their citation counts. These metrics are clear, straightforward, and easy to obtain. When a ranking of scholars is needed, for instance in grant, award, or promotion procedures, their use is the fastest and cheapest way of prioritizing some scientists over others. However, due to their nature, there is a danger of oversimplifying scientific achievements. Therefore, many other indicators have been proposed including the usage of the PageRank algorithm known for the ranking of webpages and its modifications suited to citation networks. Nevertheless, this recursive method is computationally expensive and even if it has the advantage of favouring prestige over popularity, its application should be well justified, particularly when compared to the standard citation counts. In this study, we analyze three large datasets of computer science papers in the categories of artificial intelligence, software engineering,...
Experimental research of double beta decay of atomic nuclei
F. A. Danevich
2011-12-26T23:59:59.000Z
Results of several double beta decay experiments, performed with the help of low background crystal scintillators, are presented. In particular, the half-life value of the two-neutrino double beta decay of 116-Cd has been measured as 2.9 10^{19} yr, and the new half-life limit on the neutrinoless double beta decay of 116-Cd has been established as >1.7 10^{23} yr at 90%, which corresponds to a restriction on the neutrino mass <1.7 eV. New half-life bounds on the level of 10^{17}-10^{21} yr were set for double beta processes in 64-Zn, 70-Zn, 106-Cd, 108-Cd, 114-Cd, 136-Ce, 138-Ce, 142-Ce, 160-Gd, 180-W, and 186-W by using low-background CdWO4, GSO, and ZnWO4 crystal scintillators. The claim of discovery of the neutrinoless double beta decay of 76-Ge [Mod. Phys. Lett. A 16 (2001) 2409] was analyzed. The demands of the future high sensitivity double beta decay experiments, aiming to observe the neutrinoless double beta decay or to advance restrictions on the neutrino mass to < 0.01 eV, were considered. Requirements for their sensitivity and discovery potential were formulated. Two projects of double beta experiments with a sensitivity on the level of 10^{26}-10^{27} yr (CAMEO and CARVEL projects) were discussed. Scintillation properties and radioactive contamination of CaWO4, ZnWO4, CdWO4, PbWO4, GSO(Ce), CeF3, yttrium-aluminum garnet doped with neodymium (YAG:Nd) crystal scintillators were studied. Applicability of these scintillators to search for double beta decay was discussed.
Particle count monitoring of reverse osmosis water treatment for removal of low-level radionuclides
Moritz, E.J.; Hoffman, C.R.; Hergert, T.R.
1995-03-01T23:59:59.000Z
Laser diode particle counting technology and analytical measurements were used to evaluate a pilot-scale reverse osmosis (RO) water treatment system for removal of particulate matter and sub-picocurie low-level radionuclides. Stormwater mixed with Waste Water Treatment Plant (WWTP) effluent from the Rocky Flats Environmental Technology Site (RFETS), formerly a Department of Energy (DOE) nuclear weapons production facility, were treated. No chemical pretreatment of the water was utilized during this study. The treatment system was staged as follows: multimedia filtration, granular activated carbon adsorption, hollow tube ultrafiltration, and reverse osmosis membrane filtration. Various recovery rates and two RO membrane models were tested. Analytical measurements included total suspended solids (TSS), total dissolved solids (TDS), gross alpha ({alpha}) and gross beta ({beta}) activity, uranium isotopes {sup 233/234}U and {sup 238}U, plutonium {sup 239/240}Pu, and americium {sup 241}Am. Particle measurement between 1--150 microns ({mu}) included differential particle counts (DPC), and total particle counts (TPC) before and after treatment at various sampling points throughout the test. Performance testing showed this treatment system produced a high quality effluent in clarity and purity. Compared to raw water levels, TSS was reduced to below detection of 5 milligrams per liter (mg/L) and TDS reduced by 98%. Gross {alpha} was essentially removed 100%, and gross {beta} was reduced an average of 94%. Uranium activity was reduced by 99%. TPC between 1-150{mu} were reduced by an average 99.8% to less than 1,000 counts per milliliter (mL), similar in purity to a good drinking water treatment plant. Raw water levels of {sup 239/240}Pu and {sup 241}Am were below reliable quantitation limits and thus no removal efficiencies could be determined for these species.
The First Source Counts at 18 microns from the AKARI NEP Survey
Pearson, Chris; Oyabu, S; Matsuhara, H; Wada, T; Goto, T; Takagi, T; Lee, H M; Im, M; Ohyama, Y; Kim, S J; Murata, K
2014-01-01T23:59:59.000Z
We present the first galaxy counts at 18 microns using the Japanese AKARI satellite's survey at the North Ecliptic Pole (NEP), produced from the images from the NEP-Deep and NEP-Wide surveys covering 0.6 and 5.8 square degrees respectively. We describe a procedure using a point source filtering algorithm to remove background structure and a minimum variance method for our source extraction and photometry that delivers the optimum signal to noise for our extracted sources, confirming this by comparison with standard photometry methods. The final source counts are complete and reliable over three orders of magnitude in flux density, resulting in sensitivities (80 percent completeness) of 0.15mJy and 0.3mJy for the NEP-Deep and NEP-Wide surveys respectively, a factor of 1.3 deeper than previous catalogues constructed from this field. The differential source counts exhibit a characteristic upturn from Euclidean expectations at around a milliJansky and a corresponding evolutionary bump between 0.2-0.4 mJy consiste...
Modelling the number counts of early-type galaxies by pure luminosity evolution
Ping He; Yuan-Zhong Zhang
1998-02-17T23:59:59.000Z
In this paper, we explore the plausible luminosity evolution of early-type galaxies in different cosmological models by constructing a set of pure luminosity evolution (PLE) models via the choices of the star formation rate (SFR) parameters and formation redshift $z_f$ of galaxies, with the observational constraints derived from the Hubble Space Telescope (HST) morphological number counts for elliptical and S0 galaxies of the Medium Deep Survey (MDS) and the Hubble Deep Field (HDF). We find that the number counts of early-type galaxies can be explained by the pure luminosity evolution models, without invoking exotic scenarios such as merging or introducing an additional population. But the evolution should be nearly passive, with a high $z_f$ assumed. The conclusion is valid in all of the three cosmological models we adopted in this paper. We also present the redshift distributions for three bins of observed magnitudes in F814w pass-band, to show at which redshift are the objects that dominate the counts at a given magnitude. The predictions of the redshift distribution of $22.5
Calibration of the Accuscan II In Vivo System for I-131 Thyroid Counting
Orval R. Perry; David L. Georgeson
2011-07-01T23:59:59.000Z
This report describes the March 2011 calibration of the Accuscan II HpGe In Vivo system for I-131 thyroid counting. The source used for the calibration was an Analytics mixed gamma source 82834-121 distributed in an epoxy matrix in a Wheaton Liquid Scintillation Vial with energies from 88.0 keV to 1836.1 keV. The center of the detectors was position 64-feet from the vault floor. This position places the approximate center line of the detectors at the center line of the source in the thyroid tube. The calibration was performed using an RMC II phantom (Appendix J). Validation testing was performed using a Ba-133 source and an ANSI N44.3 Phantom (Appendix I). This report includes an overview introduction and records for the energy/FWHM and efficiency calibrations including verification counting. The Accuscan II system was successfully calibrated for counting the thyroid for I-131 and verified in accordance with ANSI/HPS N13.30-1996 criteria.
Central limit theorems, Lee-Yang zeros, and graph-counting polynomials
J. L. Lebowitz; B. Pittel; D. Ruelle; E. R. Speer
2014-08-18T23:59:59.000Z
We consider the asymptotic normalcy of families of random variables $X$ which count the number of occupied sites in some large set. We write $Prob(X=m)=p_mz_0^m/P(z_0)$, where $P(z)$ is the generating function $P(z)=\\sum_{j=0}^{N}p_jz^j$ and $z_0>0$. We give sufficient criteria, involving the location of the zeros of $P(z)$, for these families to satisfy a central limit theorem (CLT) and even a local CLT (LCLT); the theorems hold in the sense of estimates valid for large $N$ (we assume that $Var(X)$ is large when $N$ is). For example, if all the zeros lie in the closed left half plane then $X$ is asymptotically normal, and when the zeros satisfy some additional conditions then $X$ satisfies an LCLT. We apply these results to cases in which $X$ counts the number of edges in the (random) set of "occupied" edges in a graph, with constraints on the number of occupied edges attached to a given vertex. Our results also apply to systems of interacting particles, with $X$ counting the number of particles in a box $\\Lambda$ whose size approaches infinity; $P(z)$ is then the grand canonical partition function and its zeros are the Lee-Yang zeros.
Double-$?$ hypernuclei in the relativistic mean-field theory
H. Shen; F. Yang; H. Toki
2006-02-14T23:59:59.000Z
We study the properties of double-$\\Lambda$ hypernuclei in the relativistic mean-field theory, which has been successfully used for the description of stable and unstable nuclei. With the meson-hyperon couplings determined by the experimental binding energies of single-$\\Lambda$ hypernuclei, we present a self-consistent calculation of double-$\\Lambda$ hypernuclei in the relativistic mean-field theory, and discuss the influence of hyperons on the nuclear core. The contribution of two mesons with dominant strange quark components (scalar $\\sigma^*$ and vector $\\phi$) to the $\\Lambda\\Lambda$ binding energy of double-$\\Lambda$ hypernuclei is examined.
Fabrication and Measurements of 500 MHz Double Spoke Cavity
Park, HyeKyoung [JLAB; Hopper, Christopher S. [Old Dominion University; Delayen, Jean R. [Old Dominion University
2014-12-01T23:59:59.000Z
A 500 MHz ?0=1 double spoke cavity has been designed and optimized for a high velocity application such as a compact electron accelerator at the Center for Accelerator Science at Old Dominion University [1] and the fabrication was recently completed at Jefferson Lab. The geometry specific to the double spoke cavity required a variety of tooling and fixtures. Also a number of asymmetric weld joints were expected to make it difficult to maintain minimal geometric deviation from the design. This paper will report the fabrication procedure, resulting tolerance from the design, initial test results and the lessons learned from the first ?0=1 double spoke cavity fabrication.
Matched Slow Pulses Using Double Electromagnetically Induced Transparency
Andrew MacRae; Geoff Campbell; A. I. Lvovsky
2008-09-29T23:59:59.000Z
We implement double electromagnetically-induced transparency (double EIT) in rubidium vapor, using a tripod-shaped energy level scheme consisting of hyperfine and magnetic sublevels of the 5S1/2 to 5P1/2 transition. We show experimentally that through the use of double EIT one can control the contrast of transparency windows as well as group velocities of the two signal fields. In particular, the group velocities can be equalized, which holds promise to greatly enhance nonlinear optical interaction between these fields.
The classical double copy for Taub-NUT spacetime
Luna, A; O'Connell, D; White, C D
2015-01-01T23:59:59.000Z
The double copy is a much-studied relationship between gauge theory and gravity amplitudes. Recently, this was generalised to an infinite family of classical solutions to Einstein's equations, namely stationary Kerr-Schild geometries. In this paper, we extend this to the Taub-NUT solution in gravity, which has a double Kerr-Schild form. The single copy of this solution is a dyon, whose electric and magnetic charges are related to the mass and NUT charge in the gravity theory. Finally, we find hints that the classical double copy extends to curved background geometries.
Majorons Without Majorana Masses and Neutrinoless Double Beta Decay
C. P. Burgess; J. M. Cline
1992-09-30T23:59:59.000Z
We explain excess events near the endpoints of the double beta decay spectra of several elements, using the neutrinoless emission of massless Goldstone bosons. Models with scalars carrying lepton number $-2$ are proposed for this purpose so that ordinary neutrinoless double beta decay is forbidden, and we can raise the scale of global symmetry breaking above the 10 keV scale needed for observable emission of conventional Majorons in double beta decay. The electron spectrum has a different shape, and the rate depends on different nuclear matrix elements, than for the emission of ordinary Majorons.
Neutrinoless Double Beta Decay and Physics Beyond the Standard Model
Rabindra N. Mohapatra
1995-07-05T23:59:59.000Z
The various mechanisms for neutrinoless double beta decay in gauge theories are reviewed and the present experimental data is used to set limits on physics scenarios beyond the standard model. The positive indications for nonzero neutrino masses in various experiments such as those involving solar, atmospheric and accelerator neutrinos are discussed and it is pointed out how some neutrino mass textures consistent with all data can be tested by the ongoing double beta decay experiments. Finally, the outlook for observable neutrinoless double beta decay signal in grand unified theories is discussed.
Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles | U.S.
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
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Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles | U.S.
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
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Submission of Final Scientific/Technical Report [Solar Avoided Cost Solution: SunShot 6 Final Report
Danziger, Eric
2014-01-29T23:59:59.000Z
The core objectives of this project were two separate but integrated products, collectively providing game-changing Avoided Cost capabilities. • The first was a kit of avoided cost tools and data that any solar provider can use a-lacarte or as a whole. It’s open and easily accessible nature allows the rapid and accurate calculation of avoided cost in whatever context and software that make sense (“Typical and Avoided Cost Tools”). This kit includes a dataset of typical energy rates, costs and usage that can be used for solar prospecting, lead generation and any situation where data about an opportunity is missing or imperfect. • The second is a web application and related APIs specifically built for solar providers to radically streamline their lead-to-sale process (“Solar Provider Module”). The typical and Avoided Cost tools are built directly into this, and allow for solar providers to track their opportunities, collaborate with their installers and financiers, and close more sales faster.
When a single hole aligns several spins: Double exchange in organic systems
Trinquier, Georges; Chilkuri, Vijay Gopal; Malrieu, Jean-Paul [Laboratoire de Chimie et Physique Quantiques, CNRS, UMR 5626, IRSAMC, Université Paul-Sabatier, 118 Rte de Narbonne, 31062 Toulouse Cedex (France)
2014-05-28T23:59:59.000Z
The double exchange is a well-known and technically important phenomenon in solid state physics. Ionizing a system composed of two antiferromagnetically coupled high-spin units, the ground state of which is a singlet state, may actually produce a high-spin ground state. This work illustrates the possible occurrence of such a phenomenon in organic chemistry. The here-considered high-spin units are triangulenes, the ground state of which is a triplet. Bridging two of them through a benzene ring produces a molecular architecture of singlet ground state. A careful exploitation of a series of unrestricted density functional calculations enables one to avoid spin contamination in the treatment of the doublet states and shows that under ionization the system becomes of quartet multiplicity in its ground state. The possibility to align more than three spins from conjugated hydrocarbon polyradicals is explored, considering partially hydrogenated triangulenes. A dramatic example shows that ionization of a singlet ground state molecule may generate a decuplet.
The gauge algebra of double field theory and Courant brackets
Hull, Chris
We investigate the symmetry algebra of the recently proposed field theory on a doubled torus that describes closed string modes on a torus with both momentum and winding. The gauge parameters are constrained fields on the ...
Towards a double field theory on para-Hermitian manifolds
Vaisman, Izu [Department of Mathematics, University of Haifa, Haifa (Israel)] [Department of Mathematics, University of Haifa, Haifa (Israel)
2013-12-15T23:59:59.000Z
In a previous paper, we have shown that the geometry of double field theory has a natural interpretation on flat para-Kähler manifolds. In this paper, we show that the same geometric constructions can be made on any para-Hermitian manifold. The field is interpreted as a compatible (pseudo-)Riemannian metric. The tangent bundle of the manifold has a natural, metric-compatible bracket that extends the C-bracket of double field theory. In the para-Kähler case, this bracket is equal to the sum of the Courant brackets of the two Lagrangian foliations of the manifold. Then, we define a canonical connection and an action of the field that correspond to similar objects of double field theory. Another section is devoted to the Marsden-Weinstein reduction in double field theory on para-Hermitian manifolds. Finally, we give examples of fields on some well-known para-Hermitian manifolds.
Young's Double Slit Experiment in Quantum Field Theory
Masakatsu Kenmoku; Kenji Kume
2011-03-01T23:59:59.000Z
Young's double slit experiment is formulated in the framework of canonical quantum field theory in view of the modern quantum optics. We adopt quantum scalar fields instead of quantum electromagnetic fields ignoring the vector freedom in gauge theory. The double slit state is introduced in Fock space corresponding to experimental setup. As observables, expectation values of energy density and positive frequency part of current with respect to the double slit state are calculated which give the interference term. Classical wave states are realized by coherent double slit states in Fock space which connect quantum particle states with classical wave states systematically. In case of incoherent sources, the interference term vanishes by averaging random phase angles as expected.
Electrochemical Double-Layer Capacitors Using Carbon Nanotube Electrode Structures
Schindall, Joel E.
The structure and behavior of the electrical double-layer capacitor (EDLC) are described. The use of activated carbon electrodes is discussed and the limitations on voltage and accessible surface area are presented. Metrics ...
EA-1136: Double Tracks Test Site, Nye County, Nevada
Broader source: Energy.gov [DOE]
This EA evaluates the environmental impacts of the proposal for the U.S. Department of Energy Nevada Operations Office to conduct environmental restoration operations at the Double Tracks test site...
Comment on "Evidence for Neutrinoless Double Beta Decay"
C. E. Aalseth; F. T. Avignone III; A. Barabash; F. Boehm; R. L. Brodzinski; J. I. Collar; P. J. Doe; H. Ejiri; S. R. Elliott; E. Fiorini; R. J. Gaitskell; G. Gratta; R. Hazama; K. Kazkaz; G. S. King III; R. T. Kouzes; H. S. Miley; M. K. Moe; A. Morales; J. Morales; A. Piepke; R. G. H. Robertson; W. Tornow; P. Vogel; R. A. Warner; J. F. Wilkerson
2002-05-22T23:59:59.000Z
We comment on the recent claim for the experimental observation of neutrinoless double-beta decay. We discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim.
Neutrinoless double beta decay, solar neutrinos and mass scales
Per Osland; Geir Vigdel
2001-09-13T23:59:59.000Z
We obtain bounds for the neutrino masses by combining atmospheric and solar neutrino data with the phenomenology of neutrinoless double beta decay where hypothetical values of || are envisaged from future 0\
Bounds on Compositeness from Neutrinoless Double Beta Decay
Orlando Panella; Yogendra N. Srivastava
1994-11-07T23:59:59.000Z
Assuming the existence of a heavy Majorana neutral particle arising from a composite model scenario we discuss the constraints imposed by present experimental limits of half-life neutrinoless double beta decay $(0\
Double Eagle II Airport (AEG) Pavement Condition and Analysis
Cal, Mark P.
Double Eagle II Airport (AEG) Pavement Condition and Analysis Submitted to: Jane M. Lucero, AICP ...................................................................................................................FWD Analysis 11 .......................................3. Predicted Pavement Conditions Assuming No Maintenance 11 .....................Table 4. Predicted Pavement Conditions (PCI) Assuming no Maintenance 12
Double beta decay experiments: beginning of a new era
A. S. Barabash
2012-09-19T23:59:59.000Z
The review of current experiments on search and studying of double beta decay processes is done. Results of the most sensitive experiments are discussed and values of modern limits on effective Majorana neutrino mass ($) are given. New results on two neutrino double beta decay are presented. The special attention is given to new current experiments with mass of studied isotopes more than 100 kg, EXO--200 and KamLAND--Zen. These experiments open a new era in research of double beta decay. In the second part of the review prospects of search for neutrinoless double beta decay in new experiments with sensitivity to $$ at the level of $\\sim 0.01-0.1$ eV are discussed. Parameters and characteristics of the most perspective projects (CUORE, GERDA, MAJORANA, SuperNEMO, EXO, KamLAND--Zen, SNO+) are given.
Effect of nuclear deformation on double beta decay
Rodin, Vadim [Institute fuer Theoretische Physik der Universitaet Tuebingen, D-72076 Tuebingen (Germany)
2009-11-09T23:59:59.000Z
The existing ways of accounting for deformation in recent calculations of neutrinoless double beta decay matrix elements are discussed. From an analysis of relevant experimental data it is argued that only {sup 150}Nd reveals convincing evidences of strong static deformation, which should eventually be taken into account in QRPA calculations. A proposal which allows in principle to measure the neutrino less double beta decay Fermi matrix element is briefly described.
Overconstrained estimates of neutrinoless double beta decay within the QRPA
Amand Faessler; Gianluigi Fogli; Eligio Lisi; Vadim Rodin; Anna Maria Rotunno; Fedor Simkovic
2008-05-29T23:59:59.000Z
Estimates of nuclear matrix elements for neutrinoless double beta decay (0nu2beta) based on the quasiparticle random phase approximations (QRPA) are affected by theoretical uncertainties, which can be substantially reduced by fixing the unknown strength parameter g_pp of the residual particle-particle interaction through one experimental constraint - most notably through the two-neutrino double beta decay (2nu2beta) lifetime. However, it has been noted that the g_pp adjustment via 2\
Neutrinoless Double Beta Decay with Negligible Neutrino Mass
Biswajoy Brahmachari; Ernest Ma
2002-02-27T23:59:59.000Z
If the electron neutrino has an effective nonzero Majorana mass, then neutrinoless double beta decay will occur. However, the latter is possible also with a negligible neutrino mass. We show how this may happen in a simple model of scalar diquarks and dileptons. This possibility allows neutrino masses to be small and hierarchical, without conflicting with the possible experimental evidence of neutrinoless double beta decay.
Energy levels of double triangular graphene quantum dots
Liang, F. X.; Jiang, Z. T., E-mail: ztjiang616@hotmail.com; Zhang, H. Y.; Li, S. [School of Physics, Beijing Institute of Technology, Beijing 100081 (China); Lv, Z. T. [School of Physics, Beijing Institute of Technology, Beijing 100081 (China); School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059 (China)
2014-09-28T23:59:59.000Z
We investigate theoretically the energy levels of the coupled double triangular graphene quantum dots (GQDs) based on the tight-binding Hamiltonian model. The double GQDs including the ZZ-type, ZA-type, and AA-type GQDs with the two GQDs having the zigzag or armchair boundaries can be coupled together via different interdot connections, such as the direct coupling, the chains of benzene rings, and those of carbon atoms. It is shown that the energy spectrum of the coupled double GQDs is the amalgamation of those spectra of the corresponding two isolated GQDs with the modification triggered by the interdot connections. The interdot connection is inclined to lift up the degeneracies of the energy levels in different degree, and as the connection changes from the direct coupling to the long chains, the removal of energy degeneracies is suppressed in ZZ-type and AA-type double GQDs, which indicates that the two coupled GQDs are inclined to become decoupled. Then we consider the influences on the spectra of the coupled double GQDs induced by the electric fields applied on the GQDs or the connection, which manifests as the global spectrum redistribution or the local energy level shift. Finally, we study the symmetrical and asymmetrical energy spectra of the double GQDs caused by the substrates supporting the two GQDs, clearly demonstrating how the substrates affect the double GQDs' spectrum. This research elucidates the energy spectra of the coupled double GQDs, as well as the mechanics of manipulating them by the electric field and the substrates, which would be a significant reference for designing GQD-based devices.
Band Tunneling through Double Barrier in Bilayer Graphene
Hasan A. Alshehab; Hocine Bahlouli; Abderrahim El Mouhafid; Ahmed Jellal
2014-01-20T23:59:59.000Z
By taking into account the full four band energy spectrum, we calculate the transmission probability and conductance of electrons across symmetric and asymmetric double potential barrier with a confined interlayer potential difference in bilayer graphene. For energies less than the interlayer coupling \\gamma_{1}, E \\gamma_{1}, we obtain four possible ways for transmission resulting from the two propagating modes. We compute the associated transmission probabilities as well as their contribution to the conductance, study the effect of the double barrier geometry.
Constraints on neutrinoless double beta decay from neutrino oscillation experiments
S. M. Bilenky; C. Giunti; M. Monteno
1997-01-15T23:59:59.000Z
We show that, in the framework of a general model with mixing of three Majorana neutrinos and a neutrino mass hierarchy, the results of the Bugey and Krasnoyarsk reactor neutrino oscillation experiments imply strong limitations for the effective Majorana mass || that characterizes the amplitude of neutrinoless double beta decay. We obtain further limitations on || from the data of the atmospheric neutrino experiments. We discuss the possible implications of the results of the future long baseline neutrino oscillation experiments for neutrinoless double beta decay.
CP Violation in Neutrinoless Double Beta Decay and Neutrino Oscillation
T. Fukuyama; K. Matsuda; H. Nishiura
1998-03-03T23:59:59.000Z
Taking account of possible CP violation, we discuss about the constraints on the lepton mixing angles from the neutrinoless double beta decay and from the neutrino oscillation for the three flavour Majorana neutrinos. From the CHORUS oscillation experiment, combined with the data of neutrinoless double beta decay, we show that the large angle solution of (\\theta_{23}) is improbable if the neutrino mass (m_3) of the third generation is a candidate of hot dark matters.
Cross sections for short pulse single and double ionization ofhelium
Palacios, Alicia; Rescigno, Thomas N.; McCurdy, C. William
2007-11-27T23:59:59.000Z
In a previous publication, procedures were proposed for unambiguously extracting amplitudes for single and double ionization from a time-dependent wavepacket by effectively propagating for an infinite time following a radiation pulse. Here we demonstrate the accuracy and utility of those methods for describing two-photon single and one-photon double ionization of helium. In particular it is shown how narrow features corresponding to autoionizing states are easily resolved with these methods.
NEMO 3 double beta decay experiment: latest results
A. S. Barabash
2008-07-17T23:59:59.000Z
The double beta decay experiment NEMO~3 has been taking data since February 2003. The aim of this experiment is to search for neutrinoless decay and investigate two neutrino double beta decay in seven different enriched isotopes ($^{100}$Mo,$^{82}$Se, $^{48}$Ca, $^{96}$Zr, $^{116}$Cd, $^{130}$Te and $^{150}$Nd). After analysis of the data corresponding to 693 days, no evidence for $0\
The Smart Kinetic Self-Avoiding Walk and Schramm-Loewner Evolution
Tom Kennedy
2015-04-16T23:59:59.000Z
The smart kinetic self-avoiding walk (SKSAW) is a random walk which never intersects itself and grows forever when run in the full-plane. At each time step the walk chooses the next step uniformly from among the allowable nearest neighbors of the current endpoint of the walk. In the full-plane a nearest neighbor is allowable if it has not been visited before and there is a path from the nearest neighbor to infinity through sites that have not been visited before. It is well known that on the hexagonal lattice the SKSAW in a bounded domain between two boundary points is equivalent to an interface in critical percolation, and hence its scaling limit is the chordal Schramm-Loewner evolution with kappa=6 (SLE_6). Like SLE there are variants of the SKSAW depending on the domain and the initial and terminal points. On the hexagonal lattice these variants have been shown to converge to the corresponding version of SLE_6. We conjecture that the scaling limit of all these variants on any regular lattice is the corresponding version of SLE_6. We test this conjecture for the square lattice by simulating the SKSAW in the full-plane and find excellent agreement with the predictions of full-plane SLE_6.
Avoid the Tsunami of the Dirac sea in the Imaginary Time Step method
Ying Zhang; Haozhao Liang; Jie Meng
2009-05-15T23:59:59.000Z
The discrete single-particle spectra in both the Fermi and Dirac sea have been calculated by the imaginary time step (ITS) method for the Schr\\"{o}dinger-like equation after avoiding the "tsunami" of the Dirac sea, i.e., the diving behavior of the single-particle level into the Dirac sea in the direct application of the ITS method for the Dirac equation. It is found that by the transform from the Dirac equation to the Schr\\"{o}dinger-like equation, the single-particle spectra, which extend from the positive to the negative infinity, can be separately obtained by the ITS evolution in either the Fermi sea or the Dirac sea. Identical results with those in the conventional shooting method have been obtained via the ITS evolution for the equivalent Schr\\"{o}dinger-like equation, which demonstrates the feasibility, practicality and reliability of the present algorithm and dispels the doubts on the ITS method in the relativistic system.
Avoid the Tsunami of the Dirac sea in the Imaginary Time Step method
Zhang, Ying; Meng, Jie
2009-01-01T23:59:59.000Z
The discrete single-particle spectra in both the Fermi and Dirac sea have been calculated by the imaginary time step (ITS) method for the Schr\\"{o}dinger-like equation after avoiding the "tsunami" of the Dirac sea, i.e., the diving behavior of the single-particle level into the Dirac sea in the direct application of the ITS method for the Dirac equation. It is found that by the transform from the Dirac equation to the Schr\\"{o}dinger-like equation, the single-particle spectra, which extend from the positive to the negative infinity, can be separately obtained by the ITS evolution in either the Fermi sea or the Dirac sea. Identical results with those in the conventional shooting method have been obtained via the ITS evolution for the equivalent Schr\\"{o}dinger-like equation, which demonstrates the feasibility, practicality and reliability of the present algorithm and dispels the doubts on the ITS method in the relativistic system.
REDUCTIONS WITHOUT REGRET: DETAILS - AVOIDING BOX CANYONS, ROACH MOTELS, AND WRONG TURNS
Swegle, John A.; Tincher, Douglas J.
2013-08-09T23:59:59.000Z
The United States is concurrently pursuing the goals of reducing the size of its nuclear weapons force – strategic and non-strategic, deployed and non-deployed – and of modernizing the weapons it continues to possess. Many of the existing systems were deployed 30 to 50 years ago, and the modernization process can be expected to extend over the next decade or more. Given the impossibility of predicting the future over the lifetime of systems that could extend to the end of this century, it is essential that dead ends in force development be avoided, and the flexibility and availability of options be retained that allow for • Scalability downward in the event that further reductions are agreed upon; • Reposturing to respond to changes in threat levels and to new nuclear actors; and • Breakout response in the event that a competitor significantly increases its force size or force capability, In this paper, we examine the current motivations for reductions and modernization; review a number of historical systems and the attendant capabilities that have been eliminated in recent decades; discuss the current path forward for the U.S. nuclear force; provide a view of the evolving deterrence situation and our assessment of the uncertainties involved; and present examples of possibly problematic directions in force development. We close with our thoughts on how to maintain flexibility and the availability of options for which a need might recur in the future.
Broader source: Energy.gov [DOE]
AIKEN, S.C. – Workers recently completed a multiyear project that removed more than 33,000 gallons of non-radioactive chemical solvents from beneath a portion of the Savannah River Site (SRS), preventing those pollutants from entering the local water table and helping the site avoid costs of more than $15 million.
Search for Neutrinoless Double-Beta Decay with CUORE Yury G. Kolomensky, for the CUORE Collaboration
of this ambitious program...". The Long Range Plan further states: "... neutrinoless double beta decay experiments
TOWARDS A PRECISION MEASUREMENT OF THE HALF LIFE OF NEUTRINOLESS DOUBLE BETA DECAY OF 136
Gratta, Giorgio
). Even if debatable, a first hint came from the claimed observation of neutrinoless double beta decay
Next Generation Neutrinoless Double -Decay Experiments Andreas Piepke, R.G. Hamish Robertson
of this ambitious program...". The Long Range Plan further states: "... neutrinoless double beta decay experiments
A Non-SUSY Model for Neutrino Oscillation, Baryogenesis and Neutrinoless Double Beta Decay
Holger Bech Nielsen; Yasutaka Takanishi
2001-10-09T23:59:59.000Z
We fitted the neutrino oscillations, baryogenesis and neutrinoless double beta decay using Anti-GUT model.
Solving the Double Digestion Problem as a MixedInteger Linear Program \\Lambda
Zhang, Yin
Solving the Double Digestion Problem as a MixedInteger Linear Program \\Lambda Zhijun Wu y and Yin Zhang z August, 2001 Abstract. The double digestion problem for DNA restriction mapping is knownscale double digestion problems. Key Words. DNA sequencing, restriction mapping, double digestion, NP
Performance Evaluation of Whole Body Counting Facilities in the Marshall Islands (2002-2005)
Kehl, S R; Hamilton, T; Jue, T; Hickman, D
2007-04-03T23:59:59.000Z
The United States Department of Energy (U.S. DOE) has recently implemented a series of strategic initiatives to address long-term radiological surveillance needs at former U.S. nuclear test sites in the Marshall Islands (https://eed.llnl.gov/mi/). Local atoll governments have been actively engaged in developing shared responsibilities for protecting the health and safety of resettled and resettling population at risk from exposure to elevated levels of residual fallout contamination in the environment. Under the program, whole body counting facilities have been established at three locations in the Marshall Islands. These facilities are operated and maintained by Marshallese technicians with scientists from the Lawrence Livermore National Laboratory (LLNL) providing technical support services including data quality assurance and performance testing. We have also established a mirror whole body counting facility at the Lawrence Livermore National Laboratory as a technician training center. The LLNL facility also allows program managers to develop quality assurance and operational procedures, and test equipment and corrective actions prior to deployment at remote stations in the Marshall Islands. This document summarizes the results of external performance evaluation exercises conducted at each of the facilities (2002-2005) under the umbrella of the Oak Ridge National Laboratory Intercomparison Studies Program (ISP). The ISP was specifically designed to meet intercomparison requirements of the United States (U.S.) Department of Energy Laboratory Accreditation Program (DOELAP). In this way, the Marshall Islands Radiological Surveillance Program has attempted to establish quality assurance measures in whole body counting that are consistent with standard requirements used to monitor DOE workers in the United States. Based on ANSI N13.30, the acceptable performance criteria for relative measurement bias and precision for radiobioassay service laboratory quality control, performance evaluation, and accreditation is -25% to +50% and less than or equal to 40%, respectively.
The impact of main belt asteroids on infrared--submillimetre photometry and source counts
Cs. Kiss; A. Pal; Th. G. Mueller; P. Abraham
2007-11-28T23:59:59.000Z
> Among the components of the infrared and submillimetre sky background, the closest layer is the thermal emission of dust particles and minor bodies in the Solar System. This contribution is especially important for current and future infrared and submillimetre space instruments --like those of Spitzer, Akari and Herschel -- and must be characterised by a reliable statistical model. > We describe the impact of the thermal emission of main belt asteroids on the 5...1000um photometry and source counts, for the current and future spaceborne and ground-based instruments, in general, as well as for specific dates and sky positions. > We used the statistical asteroid model (SAM) to calculate the positions of main belt asteroids down to a size of 1km, and calculated their infrared and submillimetre brightness using the standard thermal model. Fluctuation powers, confusion noise values and number counts were derived from the fluxes of individual asteroids. > We have constructed a large database of infrared and submillimetre fluxes for SAM asteroids with a temporal resolution of 5 days, covering the time span January 1, 2000 -- December 31, 2012. Asteroid fluctuation powers and number counts derived from this database can be obtained for a specific observation setup via our public web-interface. > Current space instruments working in the mid-infrared regime (Akari and Spitzer Space Telescopes) are affected by asteroid confusion noise in some specific areas of the sky, while the photometry of space infrared and submillimetre instruments in the near future (e.g. Herschel and Planck Space Observatories) will not be affected by asteroids. Faint main belt asteroids might also be responsible for most of the zodiacal emission fluctuations near the ecliptic.
The Feasibility of Building a 64x64 Port Count SOA-Based Optical Switch
Cheng, Qixiang; Ding, Minsheng; Wonfor, Adrian; Penty, Richard V.; White, Ian H.
2015-01-01T23:59:59.000Z
on silica planar lightwave circuit (PLC) technology have been scaled up to 32 x 32 [3], and a record of 50 x 50 port count silicon-based switch has been announced with MEMS-Actuated Adiabatic Couplers [4]. These can potentially serve as optical circuit... ”, IEEE Photon. Technol. Lett., vol. 15, no. 4, pp. 587–589, 2003. [3] S. Sohma, et. al., “Silica-based PLC Type 32 x 32 Optical Matrix Switch”, ECOC 2006, paper OThV4. [4] S. Han, et. al., “Monolithic 50x50 MEMS Silicon Photonic Switches...
Longitudinal Bunch Pattern Measurements through Single Photon Counting at SPEAR3
Wang, Hongyi (Jack); /UC, San Diego
2012-09-07T23:59:59.000Z
The Stanford Synchrotron Radiation Lightsource (SSRL), a division of SLAC National Accelerator Laboratory, is a synchrotron light source that provides x-rays for experimental use. As electrons are bent in the storage ring, they emit electromagnetic radiation. There are 372 different buckets which electrons can be loaded into. Different filling patterns produce different types of x-rays. What is the bunch pattern at a given time? Which filling pattern is better? Are there any flaws to the current injection system? These questions can be answered with this single photon counting experiment.
Statistical method for resolving the photon-photoelectron-counting inversion problem
Wu Jinlong [LMAM and School of Mathematical Sciences, Peking University, Beijing 100871 (China); Li Tiejun, E-mail: tieli@pku.edu.c [LMAM and School of Mathematical Sciences, Peking University, Beijing 100871 (China); Peng, Xiang, E-mail: xiangpeng@pku.edu.c [CREAM Group, State Key Laboratory of Advanced Optical Communication Systems and Networks (Peking University) and Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871 (China); Guo Hong, E-mail: hongguo@pku.edu.c [CREAM Group, State Key Laboratory of Advanced Optical Communication Systems and Networks (Peking University) and Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871 (China)
2011-02-01T23:59:59.000Z
A statistical inversion method is proposed for the photon-photoelectron-counting statistics in quantum key distribution experiment. With the statistical viewpoint, this problem is equivalent to the parameter estimation for an infinite binomial mixture model. The coarse-graining idea and Bayesian methods are applied to deal with this ill-posed problem, which is a good simple example to show the successful application of the statistical methods to the inverse problem. Numerical results show the applicability of the proposed strategy. The coarse-graining idea for the infinite mixture models should be general to be used in the future.
Noise Equivalent Counts Based Emission Image Reconstruction Algorithm of Tomographic Gamma Scanning
Ke Wang; Zheng Li; Wei Feng; Dong Han
2014-04-17T23:59:59.000Z
Tomographic Gamma Scanning (TGS) is a technique used to assay the nuclide distribution and radioactivity in nuclear waste drums. Both transmission and emission scans are performed in TGS and the transmission image is used for the attenuation correction in emission reconstructions. The error of the transmission image, which is not considered by the existing reconstruction algorithms, negatively affects the final results. An emission reconstruction method based on Noise Equivalent Counts (NEC) is presented. Noises from the attenuation image are concentrated to the projection data to apply the NEC Maximum-Likelihood Expectation-Maximization algorithm. Experiments are performed to verify the effectiveness of the proposed method.
Patel, Sudhir Desaibhai
1965-01-01T23:59:59.000Z
cceteet by: Cbatceen nI. C tee) Jeaeeey 1965 "497795 Tbe eatho1' efehse to sapless bi ~ siecle eppcecfetioa to Di. C. Veadstesat dot hie geidsace ?ad oouase1 ie tbe orgaoiastica of tbie stadt ead ?titian ot tbie thesis. 5v Rtjlk Of CORXERTS' l...C I r + ~ Tbe effect of different types-of dilieat ead tiaa. of. holding in tbo dilueat on ths viable oouaC'. (32o 0, -2 days) of eall, snhpeasioas of various oulturss of ~odenum&~ pro%i on plato' count 4$ar slants ac HC ~ 0 ~ 1 ~ ~ ~ ~ ~ ~ ~ ~ 0...
Reber, T J; Waugh, J A; Dessau, D S
2015-01-01T23:59:59.000Z
Detector counting rate nonlinearity, though a known problem, is commonly ignored in the analysis of angle resolved photoemission spectroscopy where modern multichannel electron detection schemes using analog intensity scales are used. We focus on a nearly ubiquitous "inverse saturation" nonlinearity that makes the spectra falsely sharp and beautiful. These artificially enhanced spectra limit accurate quantitative analysis of the data, leading to mistaken spectral weights, Fermi energies, and peak widths. We present a method to rapidly detect and correct for this nonlinearity. This algorithm could be applicable for a wide range of nonlinear systems, beyond photoemission spectroscopy.
Johnson, Eric E.
The majority of all centrifuge accidents result from user error. To avoid injury, workers should follow the manufacturer's operating instructions for each make and model of centrifuge that they use. Follow these steps for the safe operation of centrifuges: I Ensure that centrifuge bowls and tubes
There will be surprises The first step in preparing for the future and avoiding the stress of
Northern British Columbia, University of
Financial Planning and Investments Group retirement services are provided by Sun Life Assurance Company as well learn now that, despite life's bumpy path, everyone must plan for future goals, including a smoothThere will be surprises The first step in preparing for the future and avoiding the stress
Evaluation of Direct and Indirect Haptic Aiding in an Obstacle Avoidance Task for Tele-Operated Systems Samantha M. C. Alaimo*, **, Lorenzo Pollini**, Jean Pierre Bresciani*, Heinrich H. Bülthoff-mail: {samantha.alaimo, jean-pierre.bresciani, heinrich.buelthoff}@tuebingen.mpg.de) ** Dept. Electrical Systems
Morgansen, Kristi
point. From mobile robots performing a cooperative search to air traffic control for unmanned aerial performed collision avoidance for a homoge- neous group of constant-speed vehicles. The constant-speed, the more general model of a variable-speed unicycle was chosen for this work. However, arbitrary speed
Isaacs, Rufus
Mechanics for Avoiding Injury to Cold-Tender Grape Varieties Thomas J. Zabadal, MSU Dept production of grapes in cool climate viticultural regions. The soils, the length of growing season, the heat for grapevines during the winter involved two insulating materials, soil and straw. Both of these materials have
International Student Information (August 2012) Please provide all information requested. Print very clearly to help us avoid errors. Thanks! Date CWID # Social Security # SEVIS # Gender.S. ****************************************************************************************************************************************************************** YOUR RESIDENCE ADDRESS AND CONTACT LEGAL DATA: INFORMATION IN YOUR HOME COUNTRY: Date of Birth (month
9/4/12 Night shifts of the tiger: Fearsome beasts in Nepal change their sleep patterns to avoid the humans wh... 1/11dailymail.co.uk/.../Night-shifts-tiger-Fearsome-beasts-Nepal-change-sleep-patterns-avoid-humans-us... Night shifts of the tiger: Fearsome beasts in Nepal change their sleep patterns to avoid the humans who
Systematic decomposition of the neutrinoless double beta decay operator
Florian Bonnet; Martin Hirsch; Toshihiko Ota; Walter Winter
2014-06-23T23:59:59.000Z
We discuss the systematic decomposition of the dimension nine neutrinoless double beta decay operator, focusing on mechanisms with potentially small contributions to neutrino mass, while being accessible at the LHC. We first provide a (d=9 tree-level) complete list of diagrams for neutrinoless double beta decay. From this list one can easily recover all previously discussed contributions to the neutrinoless double beta decay process, such as the celebrated mass mechanism or "exotics", such as contributions from left-right symmetric models, R-parity violating supersymmetry and leptoquarks. More interestingly, however, we identify a number of new possibilities which have not been discussed in the literature previously. Contact to earlier works based on a general Lorentz-invariant parametrisation of the neutrinoless double beta decay rate is made, which allows, in principle, to derive limits on all possible contributions. We furthermore discuss possible signals at the LHC for mediators leading to the short-range part of the amplitude with one specific example. The study of such contributions would gain particular importance if there were a tension between different measurements of neutrino mass such as coming from neutrinoless double beta decay and cosmology or single beta decay.
Standard test method for nondestructive assay of plutonium by passive neutron multiplicity counting
American Society for Testing and Materials. Philadelphia
2008-01-01T23:59:59.000Z
1.1 This test method describes the nondestructive assay of plutonium in forms such as metal, oxide, scrap, residue, or waste using passive neutron multiplicity counting. This test method provides results that are usually more accurate than conventional neutron coincidence counting. The method can be applied to a large variety of plutonium items in various containers including cans, 208-L drums, or 1900-L Standard Waste Boxes. It has been used to assay items whose plutonium content ranges from 1 g to 1000s of g. 1.2 There are several electronics or mathematical approaches available for multiplicity analysis, including the multiplicity shift register, the Euratom Time Correlation Analyzer, and the List Mode Module, as described briefly in Ref. (1). 1.3 This test method is primarily intended to address the assay of 240Pu-effective by moments-based multiplicity analysis using shift register electronics (1, 2, 3) and high efficiency neutron counters specifically designed for multiplicity analysis. 1.4 This tes...
Baseline Suppression of Vehicle Portal Monitor Gamma Count Profiles: A Characterization Study
Lopresti, Charles A.; Weier, Dennis R.; Kouzes, Richard T.; Schweppe, John E.
2006-06-15T23:59:59.000Z
Radiation portal monitor (RPM) systems based upon polyvinyl toluene scintillator (PVT) gamma ray detectors have been deployed to detect illicit trafficking in radioactive materials at border crossings. This report sets forth a characterization of the baseline suppression effect in gross-count gamma ray profiles due to shadow shielding by vehicles entering radiation portal monitors. Shadow shielding is of interest because it reduces the alarm sensitivity of portal monitors. This observational study investigated three types of PVT based commercial RPM systems currently deployed at selected ports of entry in terms of spatial effects relative to detector panel orientation - driver versus passenger side, top versus bottom, and narrow lanes versus wide lanes - as observed for a large number of vehicles. Each portal site appears to have a distinctive baseline suppression signature, based on percent maximum suppression relative to measured background. Results suggest that alarm algorithms based on gross-counts may be further refined through attention to individual site characteristics. In addition, longer vehicle transit times were often correlated with stronger baseline suppression, suggesting that baseline suppression studies should take into account duration (length) of transit. (PIET-43741-TM-333-NIM)
Twente, Universiteit
1 Bachelor programme European Studies Double Diploma 2014-2015 The third year (60 EC) of the Double students who did their first two years at the University of Muenster and do their third year in 2014 arrangements For students of the old style double diploma programme who started their third year in Twente