The Minimum Constraint Removal Problem with Three Robotics Applications
Indiana University
The Minimum Constraint Removal Problem with Three Robotics Applications Kris Hauser Abstract on three example applications: generating human-interpretable excuses for failure, motion planning under their failures. Â· In human-robot interaction, semantically meaningful explanations would help people diagnose
The Minimum Constraint Removal Problem with Three Robotics Applications
Indiana University
The Minimum Constraint Removal Problem with Three Robotics Applications Kris Hauser September 13 strategies. It is demonstrated on three example applications: gener- ating human-interpretable excuses, then they provide no explanation for the failure. For several applications, it would be useful for planners
ALIGNMENT, LEVELING AND DEPLOYMENT CONSTRAINTS
Rathbun, Julie A.
Thermoelectric Generator (RTG) Crew Deployment Description Passive Seismic Experiment (PSE) Crew Deployment and Alignment Central Station Antenna Crew Deployment Description Leveling, Alignment, and Pointing Radioisotope
Finding the Energy Efficient Curve: Gate Sizing for Minimum Power under Delay Constraints
Kolodny, Avinoam
Finding the Energy Efficient Curve: Gate Sizing for Minimum Power under Delay Constraints Yoni in a fast circuit by the same factor does not yield an energy-efficient design, and we characterize efficient. A design implementation is considered to be energy efficient when it has the highest performance
The minimum-uncertainty coherent states for Landau levels
Dehghani, A. [Physics Department, Payame Noor University, P. O. Box 19395-4697 Tehran (Iran, Islamic Republic of); Fakhri, H. [Department of Theoretical Physics and Astrophysics, Faculty of Physics, University of Tabriz, P. O. Box 51666-16471 Tabriz (Iran, Islamic Republic of); Mojaveri, B. [Department of Physics, Azarbaijan Shahid Madani University, P. O. Box 51745-406 Tabriz (Iran, Islamic Republic of)
2012-12-15T23:59:59.000Z
The Glauber minimum-uncertainty coherent states with two variables for Landau levels, based on the representation of Weyl-Heisenberg algebra by two different modes, have been studied about four decades ago. Here, we introduce new two-variable coherent states with minimum uncertainty relationship for Landau levels in three different methods: the infinite unitary representation of su(1, 1) is realized in two different methods, first, by consecutive levels with the same energy gaps and also with the same value for z-angular momentum quantum number, then, by shifting z-angular momentum mode number by two units while the energy level remaining the same. Besides, for su(2), whether by lowest Landau levels or Landau levels with lowest z-angular momentum, just one finite unitary representation is introduced. Having constructed the generalized Klauder-Perelomov coherent states, for any of the three representations, we obtain their Glauber coherency by displacement operator of Weyl-Heisenberg algebra.
Minimum Energy Transmission Over a Wireless Channel With Deadline and Power Constraints
Zafer, Murtaza
We consider optimal rate-control for energy-efficient transmission of data, over a time-varying channel, with packet-deadline constraints. Specifically, the problem scenario consists of a wireless transmitter with B units ...
HIGH-LEVEL MULTI-STEP INVERTER OPTIMIZATION, USING A MINIMUM NUMBER OF POWER TRANSISTORS.
Catholic University of Chile (Universidad CatÃ³lica de Chile)
HIGH-LEVEL MULTI-STEP INVERTER OPTIMIZATION, USING A MINIMUM NUMBER OF POWER TRANSISTORS. Juan 56-41-246-999 e-mail lmoran@renoir.die.udec.cl ABSTRACT Multilevel inverters with a large number-5]. Multi-level inverters can operate not only with PWM techniques but also with amplitude modulation (AM
Minimum 186 Basin levels required for operation of ECS and CWS pumps
Reeves, K.K.; Barbour, K.L.
1992-10-01T23:59:59.000Z
Operation of K Reactor with a cooling tower requires that 186 Basin loss of inventory transients be considered during Design Basis Accident analyses requiring ECS injection, such as the LOCA and LOPA. Since the cooling tower systems are not considered safety systems, credit is not taken for their continued operation during a LOPA or LOCA even though they would likely continue to operate as designed. Without the continued circulation of cooling water to the 186 Basin by the cooling tower pumps, the 186 Basin will lose inventory until additional make-up can be obtained from the river water supply system. Increasing the make-up to the 186 Basin from the river water system may require the opening of manually operated valves, the starting of additional river water pumps, and adjustments of the flow to L Area. In the time required for these actions a loss of basin inventory could occur. The ECS and CWS pumps are supplied by the 186 Basin. A reduction in the basin level will result in decreased pump suction head. This reduction in suction head will result in decreased output from the pumps and, if severe enough, could lead to pump cavitation for some configurations. The subject of this report is the minimum 186 Basin level required to prevent ECS and CWS pump cavitation. The reduction in ECS flow due to a reduced 186 Basin level without cavitation is part of a separate study.
PALeo-constraints on SEA-level rise (PALSEA) -a PAGES/IMAGES working group
Siddall, Mark
PALeo-constraints on SEA-level rise (PALSEA) - a PAGES/IMAGES working group Coordinators: Mark for the reduction in ice sheets and subsequent rise in sea level over the next century are highly uncertain rise. Interglacial sea levels constrain the global sensitivity of sea-level to radiative forcing. Well
Tree-level unitarity constraints in the most general two Higgs doublet model
Ginzburg, I.F. [Sobolev Institute of Mathematics, acad. Koptyug avenue 4, 630090, Novosibirsk (Russian Federation); Ivanov, I.P. [Sobolev Institute of Mathematics, acad. Koptyug avenue 4, 630090, Novosibirsk (Russian Federation); INFN, Gruppo Collegato di Cosenza, Ponte Bucci, 31C, Dipartimento di Fisica, Universita della Calabria, Arcavacata di Rende (Serbia and Montenegro), 87036 (Italy)
2005-12-01T23:59:59.000Z
We obtain tree-level unitarity constraints for the most general Two-Higgs-Doublet Model (2HDM) with explicit CP-violation. We briefly discuss correspondence between possible violation of tree-level unitarity limitation and physical content of the theory.
Vaquero, J M; Usoskin, I G; Carrasco, V M S; Gallego, M C
2015-01-01T23:59:59.000Z
The Maunder minimum (MM) of greatly reduced solar activity took place in 1645-1715, but the exact level of sunspot activity is uncertain as based, to a large extent, on historical generic statements of the absence of spots on the Sun. Here we aim, using a conservative approach, to assess the level and length of solar cycle during the Maunder minimum, on the basis of direct historical records by astronomers of that time. A database of the active and inactive days (days with and without recorded sunspots on the solar disc respectively) is constructed for three models of different levels of conservatism (loose ML, optimum MO and strict MS models) regarding generic no-spot records. We have used the active day fraction to estimate the group sunspot number during the MM. A clear cyclic variability is found throughout the MM with peaks at around 1655--1657, 1675, 1684 and 1705, and possibly 1666, with the active day fraction not exceeding 0.2, 0.3 or 0.4 during the core MM, for the three models. Estimated sunspot nu...
PUBLISHED ONLINE: 26 JULY 2009 | DOI: 10.1038/NGEO587 Constraints on future sea-level rise from past
Siddall, Mark
LETTERS PUBLISHED ONLINE: 26 JULY 2009 | DOI: 10.1038/NGEO587 Constraints on future sea-level rise to project sea-level rise in response to warming climates by the end of the century, especially becauseÂ24 cm of sea-level rise during the twentieth century, in agreement with the Fourth Assessment Report
Rogers, Leslie A.
The requirement that a planet must orbit outside of its Roche limit gives a lower limit on the planet's mean density. The minimum density depends almost entirely on the orbital period and is immune to systematic errors in ...
Hempling, S.; Elefant, C.; Cory, K.; Porter, K.
2010-01-01T23:59:59.000Z
State legislatures and state utility commissions trying to attract renewable energy projects are considering feed-in tariffs, which obligate retail utilities to purchase electricity from renewable producers under standard arrangements specifying prices, terms, and conditions. The use of feed-in tariffs simplifies the purchase process, provides revenue certainty to generators, and reduces the cost of financing generating projects. However, some argue that federal law--including the Public Utility Regulatory Policies Act of 1978 (PURPA) and the Federal Power Act of 1935 (FPA)--constrain state-level feed-in tariffs. This report seeks to reduce the legal uncertainties for states contemplating feed-in tariffs by explaining the constraints imposed by federal statutes. It describes the federal constraints, identifies transaction categories that are free of those constraints, and offers ways for state and federal policymakers to interpret or modify existing law to remove or reduce these constraints. This report proposes ways to revise these federal statutes. It creates a broad working definition of a state-level feed-in tariff. Given this definition, this report concludes there are paths to non-preempted, state-level feed-in tariffs under current federal law.
Parekh, Jayanti Lal
1965-01-01T23:59:59.000Z
METHODOLOGY OF THE STUDY 10 10 17 The Linear Programming Technique . Source of' Data General Plan of' the Study Basic Assumptions Equity in Land Labor . Capital . . . . . . . . . . ~ ~ Level of Technology Unallocated Overhead Costs Machinery... Resource Programming Models RESULTS OF MINIMUM RESOURCE PROGRAMMING e 4 17 18 18 21 21 24 25 27 28 28 30 30 31 32 32 33 34 35 38 Comparison of Results of Minimizing Land, Labor and Total Cost $3, 000 Return to Operator's Labor...
A Multi-level Constraint-based Controller for the Dynamo98 Robot Soccer Team
Mackworth, Alan K.
as the dynamics of the plant and the controller can be modeled individually and then integrated 7]. A con- troller provide a semantic model for modeling hy- brid dynamic systems. Controllers are embedded constraint is used by many researchers and has been chosen as the o cial simulator for the RoboCup Simulation League
Papalambros, Panos
://mdolab.engin.umich.edu/content/ multidisciplinary-design-optimization-offshore-wind-turbines-minimum-levelized-cost-energy. The published article.A.M. van Kuik. Multidisciplinary Design Optimization of Offshore Wind Turbines for Minimum Levelized Cost of Energy. Renewable Energy (In press), 2014 Multidisciplinary Design Optimization of Offshore Wind Turbines
Fournier, Sean Donovan; Beall, Patrick S [Sandia National Laboratories, Livermore, CA; Miller, Mark L.
2014-08-01T23:59:59.000Z
Through the SNL New Mexico Small Business Assistance (NMSBA) program, several Sandia engineers worked with the Environmental Restoration Group (ERG) Inc. to verify and validate a novel algorithm used to determine the scanning Critical Level (L c ) and Minimum Detectable Concentration (MDC) (or Minimum Detectable Areal Activity) for the 102F scanning system. Through the use of Monte Carlo statistical simulations the algorithm mathematically demonstrates accuracy in determining the L c and MDC when a nearest-neighbor averaging (NNA) technique was used. To empirically validate this approach, SNL prepared several spiked sources and ran a test with the ERG 102F instrument on a bare concrete floor known to have no radiological contamination other than background naturally occurring radioactive material (NORM). The tests conclude that the NNA technique increases the sensitivity (decreases the L c and MDC) for high-density data maps that are obtained by scanning radiological survey instruments.
Williston Basin subsidence and sea level history: Chronological and lithofacies constraints
Lee Roark, C.K.
1989-01-01T23:59:59.000Z
The intent is to use lithofacies information to identify the top-driven components of sediment accumulation-depositional environments, sediments supply, compaction, sediment and water load. Physical carbonate stratigraphy is used to determine sediment accumulation corrections. Physical stratigraphic geometric patterns are used to estimate the original thicknesses of dissolved salts and to determine absolute water depth. Seawater strontium chronostratigraphy constrains the ages and paleo-oceanographic setting of Devonian-Mississippian strata. The measured strontium stratigraphy can be used for correlation, age assignment and diagentic study. Removing sediment compaction, sediment/water load effects and using the newly derived Devonian-Mississippian chronostratigraphy to examine the behavior of the Williston Basin reveals a number of facts. (1) Temporal and spatial variation in the surficial components of sediment accumulation is significant and, unless removed, obscures tectonic subsidence and sea-level change patterns. (2) Both the corrected tectonic subsidence/sea level record and lithofacies patterns of the Devonian Williston Basin show flexural or in-plane stress interference reflecting plate boundary reorganization along the near edge of the Paleozoic North American craton, culminating the Antler orogeny. (3) The tectonic subsidence and sea level change record of the Williston Basin which has been corrected for sediment compaction, water and sediment load, has extremely linear subsidence through time. This is interrupted by changes in global sea level of 100-140 m over 25-35 my and apparent sea level change of 35-60 m over 2-4 my.
ILPBased Scheduling with Time and Resource Constraints in High Level Synthesis \\Lambda
Walker, Robert A.
The scheduling problem in highÂlevel synthesis is conÂ cerned with sequencing the operators of a controlÂ constrained scheduling (RCS) minimizes the number of control steps when the number of FU's are fixed; (2) timeÂconstrained scheduling (TCS) minimizes the number of resources when the number of control steps is fixed. We can also
Non-local Higgs actions: Tree-level electroweak constraints and high-energy unitarity
M. Beneke; P. Knechtges; A. Mück
2011-08-09T23:59:59.000Z
We consider electroweak symmetry breaking by a certain class of non-local Higgs sectors. Extending previous studies employing the Mandelstam condition, a straight Wilson line is used to make the Higgs action gauge invariant. We show the unitarization of vector-boson scattering for a wide class of non-local actions, but find that the Wilson-line model leads to tree-level corrections to electroweak precision observables, which restrict the parameter space of the model. We also find that Unhiggs models cannot address the hierarchy problem, once the parameters are expressed in terms of low-energy observables.
Dalsgaard, Tage
A major percentage (20 to 40%) of global marine fixed-nitrogen loss occurs in oxygen minimum zones (OMZs). Concentrations of O[subscript 2] and the sensitivity of the anaerobic N[subscript 2]-producing processes of anammox ...
Tims, Geoff
2013-01-01T23:59:59.000Z
??Haemers' minimum rank was first defined by Willem Haemers in 1979. He created this graph parameter as an upper bound for the Shannon capacity of… (more)
Waller, Mark L.; Amosson, Stephen H.; Welch, Mark; Dhuyvetter, Kevin C.
2008-10-17T23:59:59.000Z
A minimum price contract is one of many tools a marketer may use to better manage price and production risk while trying to achieve financial goals and objectives. This publication discusses the advantages and disadvantages involved...
Guaranteed Minimum-Rank Solutions of Linear Matrix Equations via Nuclear Norm Minimization
Recht, Benjamin
The affine rank minimization problem consists of finding a matrix of minimum rank that satisfies a given system of linear equality constraints. Such problems have appeared in the literature of a diverse set of fields ...
Wies, Thomas
2005-11-03T23:59:59.000Z
We introduce field constraint analysis, a new technique for verifying data structure invariants. A field constraint for a field is a formula specifying a set of objects to which the field can point. Field constraints ...
Minimum Gas Service Standards (Ohio)
Broader source: Energy.gov [DOE]
Natural gas companies in Ohio are required to follow the Minimum Gas Service Standards, which are set and enforced by the Public Utilities Commission of Ohio. These rules are found in chapter 4901...
Minimum Stream Flow Standards (Connecticut)
Broader source: Energy.gov [DOE]
These regulations apply to all dams and structures which impound or divert waters on rivers or their tributaries, with some exceptions. The regulations set standards for minimum flow (listed in the...
de Lijser, Peter
Campus Outdoor Lighting Standards The following standards provide for minimum safe lighting with a minimum of 3 foot candles. This lighting level is for daytime and at night. Public Streets Streets must have a minimum of one foot candles average with a minimum of .6 foot candles. Augmented lighting should
Nareyek, A; Freuder, E C; Fourer, R; Giunchiglia, R P; Kautz, H; Rintanen, J; Tate, Austin
2005-01-01T23:59:59.000Z
Tackling real-world problems often requires to take various types of constraints into account. Such constraint types range from simple numerical comparators to complex resources. This article describes how planning techniques ...
Impact of unit commitment constraints on generation expansion planning with renewables
Palmintier, Bryan Stephen
Growing use of renewables pushes thermal generators against operating constraints - e.g. ramping, minimum output, and operating reserves - that are traditionally ignored in expansion planning models. We show how including ...
GMTI radar minimum detectable velocity.
Richards, John Alfred
2011-04-01T23:59:59.000Z
Minimum detectable velocity (MDV) is a fundamental consideration for the design, implementation, and exploitation of ground moving-target indication (GMTI) radar imaging modes. All single-phase-center air-to-ground radars are characterized by an MDV, or a minimum radial velocity below which motion of a discrete nonstationary target is indistinguishable from the relative motion between the platform and the ground. Targets with radial velocities less than MDV are typically overwhelmed by endoclutter ground returns, and are thus not generally detectable. Targets with radial velocities greater than MDV typically produce distinct returns falling outside of the endoclutter ground returns, and are thus generally discernible using straightforward detection algorithms. This document provides a straightforward derivation of MDV for an air-to-ground single-phase-center GMTI radar operating in an arbitrary geometry.
Minimum cost model energy code envelope requirements
Connor, C.C.; Lucas, R.G.; Turchen, S.J.
1994-08-01T23:59:59.000Z
This paper describes the analysis underlying development of the U.S. Department of Energy`s proposed revisions of the Council of American Building Officials (CABO) 1993 Model Energy Code (MEC) building thermal envelope requirements for single-family and low-rise multifamily residences. This analysis resulted in revised MEC envelope conservation levels based on an objective methodology that determined the minimum-cost combination of energy efficiency measures (EEMs) for residences in different locations around the United States. The proposed MEC revision resulted from a cost-benefit analysis from the consumer`s perspective. In this analysis, the costs of the EEMs were balanced against the benefit of energy savings. Detailed construction, financial, economic, and fuel cost data were compiled, described in a technical support document, and incorporated in the analysis. A cost minimization analysis was used to compare the present value of the total long-nm costs for several alternative EEMs and to select the EEMs that achieved the lowest cost for each location studied. This cost minimization was performed for 881 cities in the United States, and the results were put into the format used by the MEC. This paper describes the methodology for determining minimum-cost energy efficiency measures for ceilings, walls, windows, and floors and presents the results in the form of proposed revisions to the MEC. The proposed MEC revisions would, on average, increase the stringency of the MEC by about 10%.
On Cartesian trees and range minimum queries
Demaine, Erik D.
We present new results on Cartesian trees with applications in range minimum queries and bottleneck edge queries. We introduce a cache-oblivious Cartesian tree for solving the range minimum query problem, a Cartesian tree ...
HEAT Loan Minimum Standards and Requirements
Broader source: Energy.gov [DOE]
Presents additional resources on loan standards and requirements from Elise Avers' presentation on HEAT Loan Minimum Standards and Requirements.
Energy Consumption of Minimum Energy Coding in
Johansson, Karl Henrik
Energy Consumption of Minimum Energy Coding in CDMA Wireless Sensor Networks Benigno Zurita Ares://www.ee.kth.se/control Abstract. A theoretical framework is proposed for accurate perfor- mance analysis of minimum energy coding energy consumption is analyzed for two coding schemes proposed in the literature: Minimum Energy coding
Multiple criteria minimum spanning trees Pedro Cardoso
Coello, Carlos A. Coello
Multiple criteria minimum spanning trees Pedro Cardoso MÂ´ario Jesus Â´Alberto MÂ´arquez Abstract The NP multiple criteria minimum spanning tree as several applications into the network design problems criteria minimum spanning trees. There are several geometric network design and application problems
Soft Constraints for Quality Aspects in Service Oriented Architectures
Bistarelli, Stefano; 10.4204/EPTCS.2.5
2009-01-01T23:59:59.000Z
We propose the use of Soft Constraints as a natural way to model Service Oriented Architecture. In the framework, constraints are used to model components and connectors and constraint aggregation is used to represent their interactions. The "quality of a service" is measured and considered when performing queries to service providers. Some examples consist in the levels of cost, performance and availability required by clients. In our framework, the QoS scores are represented by the softness level of the constraint and the measure of complex (web) services is computed by combining the levels of the components.
Requirements: A minimum of 15 PSYC credits, including
Alpay, S. Pamir
Â» Three other 2000-3000-level PSYC courses (any area) No more than 3 credits of PSYC 3889 or 3999 canRequirements: A minimum of 15 PSYC credits, including: Â» One Area I course Â» One Area II course) ___2100 (Principles of Research in Psychology) Area I. Social, Developmental, Clinical, & Industrial
The Energy-Dependence of GRB Minimum Variability Timescales
Golkhou, V Zach; Littlejohns, Owen M
2015-01-01T23:59:59.000Z
We constrain the minimum variability timescales for 938 GRBs observed by the Fermi/GBM instrument prior to July 11, 2012. The tightest constraints on progenitor radii derived from these timescales are obtained from light curves in the hardest energy channel. In the softer bands -- or from measurements of the same GRBs in the hard X-rays from Swift -- we show that variability timescales tend to be a factor 2--3 longer. Applying a survival analysis to account for detections and upper limits, we find median minimum timescale in the rest frame for long-duration and short-duration GRBs of 45 ms and 10 ms, respectively. Fewer than 10% of GRBs show evidence for variability on timescales below 2 ms. These shortest timescales require Lorentz factors $\\gtrsim 400$ and imply typical emission radii $R \\approx 1 {\\times} 10^{14}$ cm for long-duration GRBs and $R \\approx 3 {\\times} 10^{13}$ cm for short-duration GRBs. We discuss implications for the GRB fireball model and investigate whether GRB minimum timescales evolve w...
New current control concept -- Minimum time current control in the three-phase PWM converter
Choi, J.W. [LG Industrial Systems, Seoul (Korea, Republic of); Sul, S.K. [Seoul National Univ. (Korea, Republic of). School of Electrical Engineering
1997-01-01T23:59:59.000Z
In this paper, a new current controller that guarantees the fastest transient response is proposed. The basic concept is to find the optimal control voltage for tracking the reference current with minimum time under the voltage limit constraint. Though this minimum time control concept is also applicable to all the machine drive systems, this paper focuses on the current regulation in the three-phase pulse width modulation (PWM) converter. In the simulation and experimental results, it is observed that the proposed controller has much less transient time than the conventional synchronous PI regulator and the performance of the dc link voltage control is also greatly improved with the proposed current controller.
Hazardous Waste Minimum Distance Requirements (Connecticut)
Broader source: Energy.gov [DOE]
These regulations set minimum distance requirements between certain types of facilities that generate, process, store, and dispose of hazardous waste and other land uses. The regulations require an...
Constraint and Restoring Force
Beal, Jacob
2007-08-24T23:59:59.000Z
Long-lived sensor network applications must be able to self-repair and adapt to changing demands. We introduce a new approach for doing so: Constraint and Restoring Force. CRF is a physics-inspired framework for computing ...
Knots and Minimum Distance Energy Rosanna Speller
Denne, Elizabeth
Knots and Minimum Distance Energy Rosanna Speller (Dated: May 11, 2008) Professor Elizabeth Denne have least Minimum Distance Energy. I previously showed that the energy is minimized for convex polygons. We hope relating the energy to chords of polygons will be a helpful step towards showing
Flammability limits of dusts: Minimum inerting concentrations
Dastidar, A.G.; Amyotte, P.R. [Dalhousie Univ., Halifax, Nova Scotia (Canada). Dept. of Chemical Engineering] [Dalhousie Univ., Halifax, Nova Scotia (Canada). Dept. of Chemical Engineering; Going, J.; Chatrathi, K. [Fike Corp., Blue Springs, MO (United States)] [Fike Corp., Blue Springs, MO (United States)
1999-05-01T23:59:59.000Z
A new flammability limit parameter has been defined as the Minimum Inerting Concentration (MIC). This is the concentration of inertant required to prevent a dust explosion regardless of fuel concentration. Previous experimental work at Fike in a 1-m{sup 3} spherical chamber has shown this flammability limit to exist for pulverized coal dust and cornstarch. In the current work, inerting experiments with aluminum, anthraquinone and polyethylene dusts as fuels were performed, using monoammonium phosphate and sodium bicarbonate as inertants. The results show that an MIC exists only for anthraquinone inerted with sodium bicarbonate. The other combustible dust and inertant mixtures did not show a definitive MIC, although they did show a strong dependence between inerting level and suspended fuel concentration. As the fuel concentration increased, the amount of inertant required to prevent an explosion decreased. Even though a definitive MIC was not found for most of the dusts an effective MIC can be estimated from the data. The use of MIC data can aid in the design of explosion suppression schemes.
Minimum rank of graphs that allow loops.
Mikkelson, Rana C.
2008-01-01T23:59:59.000Z
??The traditional "minimum rank problem" for simple graphs associates a set of symmetric matrices, the zero-nonzero pattern of whose off-diagonal entries are described by the… (more)
Credible Research Designs for Minimum Wage Studies
Allegretto, Sylvia; Dube, Arindrajit; Reich, Michael; Zipperer, Ben
2013-01-01T23:59:59.000Z
adjusted Current Employment Statistics data from BLS. TheBureau of Labor Statistics’ Employment and Earnings Reports.and Statistics 92, 4: 945-64. [27] _________2013. “Minimum Wage Shocks, Employment
ITP Steel: Theoretical Minimum Energies to Produce Steel for...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Theoretical Minimum Energies to Produce Steel for Selected Conditions, March 2000 ITP Steel: Theoretical Minimum Energies to Produce Steel for Selected Conditions, March 2000...
SOLAR ROTATION RATE DURING THE CYCLE 24 MINIMUM IN ACTIVITY
Antia, H. M. [Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India); Basu, Sarbani, E-mail: antia@tifr.res.i, E-mail: sarbani.basu@yale.ed [Department of Astronomy, Yale University, P.O. Box 208101, New Haven CT 06520-8101 (United States)
2010-09-01T23:59:59.000Z
The minimum of solar cycle 24 is significantly different from most other minima in terms of its duration as well as its abnormally low levels of activity. Using available helioseismic data that cover epochs from the minimum of cycle 23 to now, we study the differences in the nature of the solar rotation between the minima of cycles 23 and 24. We find that there are significant differences between the rotation rates during the two minima. There are differences in the zonal-flow pattern too. We find that the band of fast rotating region close to the equator bifurcated around 2005 and recombined by 2008. This behavior is different from that during the cycle 23 minimum. By autocorrelating the zonal-flow pattern with a time shift, we find that in terms of solar dynamics, solar cycle 23 lasted for a period of 11.7 years, consistent with the result of Howe et al. (2009). The autocorrelation coefficient also confirms that the zonal-flow pattern penetrates through the convection zone.
Seldin, Jonathan P.
*Management 4640 - Cross-Cultural Work Study Four courses at the 3000/4000 level from any faculty A minimumThe Bachelor of Management degree in International Management is a minimum of 40 courses in length) and Statistics 1770. Admission to Management programs is competitive and is based on academic achievement prior
Building Information Modeling - A Minimum Mathematical Configuration
Bhandare, Ruchika
2012-10-19T23:59:59.000Z
minimum information required to execute the construction of a project. A plain concrete beam element was used as the case study for this research. The results show that a minimal information schema can be developed for a simple building element. Further...
Learning Minimum Volume Sets Clayton Scott
Scott, Clayton
Learning Minimum Volume Sets Clayton Scott Statistics Department Rice University Houston, TX 77005 herein are primarily of theoretical interest, although they may be implemented e#eciently for certain measure based on S: # P (G) = (1/n) # n i=1 I(X i # G). Here I(Â·) is the indicator function. Set Âµ
Minimum Energy Diagrams for Multieffect Distillation Arrangements
Skogestad, Sigurd
and the energy use from this process accounts for an estimated 3% of the world energy consumption.1 With rising on the overall plant energy consumption. The use of heat integration combined with complex config- urations distillation ar- rangements. An easy form of comparison for energy consumption is the minimum vapor flow rate
Parametric and Kinetic Minimum Spanning Trees Pankaj K. Agarwal 1
Eppstein, David
Parametric and Kinetic Minimum Spanning Trees Pankaj K. Agarwal 1 David Eppstein 2 Leonidas J. Guibas 3 Monika R. Henzinger 4 Abstract We consider the parametric minimum spanning tree problem- pute the sequence of minimum spanning trees generated as varies. We also consider the kinetic minimum
Supertree Construction with Constraint Programming
Gent, I.P.; Prosser, P.
Gent,I.P. Prosser,P. Smith,B.M. Wei,W. Principles and Practice of Constraint Programming pp 837-841 Springer
Integer Constraints to Stop Deforestation
Seidl, Helmut
Integer Constraints to Stop Deforestation Helmut Seidl FB IV -- Informatik University Trier D--54286 Trier seidl@ti.uniÂtrier.de Abstract. Deforestation is a transformation of functional programs it with additional constraint systems. We examplify our idea with a problem related to deforestation. In 1988, Phil
A Theoretical Framework for Constraint Hierarchy Solvers
Bartak, Roman
describe a scale of constraint hierarchy solvers from the refining method to the local propagation methods methods. Formally, a constraint hierarchy is a set of labelled constraints. The hierarchy can. A solution to the constraint hierarchy is a valuation of variables in the constraints
Approximating the Minimum Spanning Tree Weight in Sublinear Time
Trevisan, Luca
Approximating the Minimum Spanning Tree Weight in Sublinear Time Bernard Chazelle #3; Ronitt a parameter 0 minimum spanning tree- components algorithm picks O(1=#15; 2 ) vertices in the graph and then grows \\local spanning trees" whose
Constraint Application with Higher-Order Programming
Miranda, Eduardo Reck
the following components, which are essential for solving musical constraint satisfaction problems (CSP constraints to variables in the music representation. A CSP usually presents a combinatorial problem
Minimum-Energy Multicast Tree in Cognitive Radio Networks
Islam, M. Saif
Minimum-Energy Multicast Tree in Cognitive Radio Networks Wei Ren, Xiangyang Xiao, Qing Zhao algorithm with bounded performance guarantee for constructing the minimum-energy multicast tree, which by studying the impact of the traffic load of the primary network on the minimum-energy multicast tree. I
Using Sparsification for Parametric Minimum Spanning Tree Problems
Eppstein, David
Using Sparsification for Parametric Minimum Spanning Tree Problems David Fern'andezÂBaca 1? , Giora with a parameter. The second is an asymptotically optimal algorithm for the minimum ratio spanning tree problem, as well as other search problems, on dense graphs. 1 Introduction In the parametric minimum spanning tree
Using Sparsification for Parametric Minimum Spanning Tree Problems
Eppstein, David
Using Sparsification for Parametric Minimum Spanning Tree Problems David FernÂ´andez-Baca Giora algorithm for the minimum ratio spanning tree problem, as well as other search prob- lems, on dense graphs. 1 Introduction In the parametric minimum spanning tree problem, one is given an n-node, m
Stochastic Minimum Spanning Trees in Euclidean Spaces Pegah Kamousi #
Chan, Timothy M.
Stochastic Minimum Spanning Trees in Euclidean Spaces Pegah Kamousi # Computer Science UniversityÂ1Â4503Â0682Â9/11/06 ...$10.00. Keywords Algorithms, Theory General Terms Stochastic Minimum Spanning Trees, Geometric Data and arbitrary but known probability p i . We want to compute the expected length of the minimum spanning tree
On Two-Stage Stochastic Minimum Spanning Kedar Dhamdhere1
Ravi, R.
On Two-Stage Stochastic Minimum Spanning Trees Kedar Dhamdhere1 , R. Ravi2 , and Mohit Singh2 1}@andrew.cmu.edu Abstract. We consider the undirected minimum spanning tree problem in a stochastic optimization setting algorithm. We then consider the Stochastic minimum spanning tree problem in a more general black-box model
The stackelberg minimum spanning tree game on planar and bounded-treewidth graphs
Cardinal, Jean
The Stackelberg Minimum Spanning Tree Game is a two-level combinatorial pricing problem introduced at WADS’07. The game is played on a graph, whose edges are colored either red or blue, and where the red edges have a given ...
Cooperative Exploration under Communication Constraints
How, Jonathan P.
process has not been fully characterized. Existing exploration algorithms do not realistically modelCooperative Exploration under Communication Constraints by Emily M. Craparo Submitted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . David Darmofal Chairman, Department Committee on Graduate Students #12;2 #12;Cooperative Exploration
Nonlinear constraints on gravity from entanglement
Shamik Banerjee; Apratim Kaviraj; Aninda Sinha
2015-02-05T23:59:59.000Z
Using the positivity of relative entropy arising from the Ryu-Takayanagi formula for spherical entangling surfaces, we obtain constraints at the nonlinear level for the gravitational dual. We calculate the Green's function necessary to compute the first order correction to the entangling surface and use this to find the relative entropy for non-constant stress tensors in a derivative expansion. We show that the Einstein value satisfies the positivity condition while the multi-dimensional parameter space away from it gets constrained.
Large Scale Structure Forecast Constraints on Particle Production During Inflation
Teeraparb Chantavat; Christopher Gordon; Joseph Silk
2011-04-26T23:59:59.000Z
Bursts of particle production during inflation provide a well-motivated mechanism for creating bump like features in the primordial power spectrum. Current data constrains these features to be less than about 5% the size of the featureless primordial power spectrum at wavenumbers of about 0.1 h Mpc^{-1}. We forecast that the Planck cosmic microwave background experiment will be able to strengthen this constraint to the 0.5% level. We also predict that adding data from a square kilometer array (SKA) galaxy redshift survey would improve the constraint to about the 0.1% level. For features at larger wave-numbers, Planck will be limited by Silk damping and foregrounds. While, SKA will be limited by non-linear effects. We forecast for a Cosmic Inflation Probe (CIP) galaxy redshift survey, similar constraints can be achieved up to about a wavenumber of 1 h Mpc^{-1}.
Constraint-Based Inference: A Bridge between Constraint Processing and
Mackworth, Alan K.
in representation and essentially identical inference approaches. In the constraint processing community, Semiring CSP [2] and Valued CSP [3] are two of the most widely studied generalized frameworks that abstract-Based Generalized Framework for CBI Problems There are two essential operators in real world CBI problems: (1
Minimum concave cost flows in capacitated grid networks
2014-03-31T23:59:59.000Z
We study the minimum concave cost flow problem over a two-dimensional .... as a building block for the theory of production planning and inventory control.
Tungsten Cluster Migration on Nanoparticles: Minimum Energy Pathway...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Pathway and Migration Mechanism. Tungsten Cluster Migration on Nanoparticles: Minimum Energy Pathway and Migration Mechanism. Abstract: Transition state searches have been...
Optimization Online - Guaranteed Minimum-Rank Solutions of ...
Benjamin Recht
2007-06-28T23:59:59.000Z
Jun 28, 2007 ... Guaranteed Minimum-Rank Solutions of Linear Matrix Equations via Nuclear Norm Minimization. Benjamin Recht(brecht ***at*** caltech.edu)
Microbial metatranscriptomics in a permanent marine oxygen minimum zone
Stewart, Frank J.
Simultaneous characterization of taxonomic composition, metabolic gene content and gene expression in marine oxygen minimum zones (OMZs) has potential to broaden perspectives on the microbial and biogeochemical dynamics ...
DOE CYBER SECURITY EBK: MINIMUM CORE COMPETENCY TRAINING REQUIREMENTS...
Broader source: Energy.gov (indexed) [DOE]
DOE CYBER SECURITY EBK: MINIMUM CORE COMPETENCY TRAINING REQUIREMENTS DOE CYBER SECURITY EBK: CORE COMPETENCY TRAINING REQUIREMENTS: CA Cybersecurity Program Manager (CSPM...
PJM©2012 Minimum Generation Alert PJM Actions
Evaluate Schedules (including; Prior Light; Load Period
– To provide alert that system conditions may require the use of emergency procedures as a result of generation exceeding demand. • Trigger – When expected generation levels approach 2,500 MW of normal generation limits.
Structured Communications with Concurrent Constraints
Torino, UniversitÃ di
a particular care in the defi- nition of typing rules to assure the bilinearity condition in presence constraints, name pass- ing and sessions. In this way we get enough expressivity to represent both quality is a type assignment system whose main novelty is the assurance of channel bilinearity in presence
minimum weight topology optimization subject to unsteady heat ...
2011-05-13T23:59:59.000Z
In these works, the optimization of riser design is for- mulated as a ... the riser volume and a few constraints are defined to enforce the directional solid- ification
On the minimum dark matter mass testable by neutrinos from the Sun
Busoni, Giorgio; Simone, Andrea De; Huang, Wei-Chih, E-mail: giorgio.busoni@sissa.it, E-mail: andrea.desimone@sissa.it, E-mail: wei-chih.huang@sissa.it [SISSA and INFN, Sezione di Trieste, via Bonomea 265, I-34136 Trieste (Italy)
2013-07-01T23:59:59.000Z
We discuss a limitation on extracting bounds on the scattering cross section of dark matter with nucleons, using neutrinos from the Sun. If the dark matter particle is sufficiently light (less than about 4 GeV), the effect of evaporation is not negligible and the capture process goes in equilibrium with the evaporation. In this regime, the flux of solar neutrinos of dark matter origin becomes independent of the scattering cross section and therefore no constraint can be placed on it. We find the minimum values of dark matter masses for which the scattering cross section on nucleons can be probed using neutrinos from the Sun. We also provide simple and accurate fitting functions for all the relevant processes of GeV-scale dark matter in the Sun.
Algorithms to Compute Minimum Cycle Basis in Directed Graphs #
Mehlhorn, Kurt
, . . . ,C d whose incidence vectors permit a unique linear combination of the incidence vector of any cycleAlgorithms to Compute Minimum Cycle Basis in Directed Graphs # Telikepalli Kavitha + Kurt Mehlhorn # Abstract We consider the problem of computing a minimum cycle basis in a diÂ rected graph G with m arcs
Approximate Minimum-Energy Multicasting in Wireless Ad Hoc Networks
Liang, Weifa
and a set of destination nodes, the problem is to build a minimum-energy multicast tree for the requestApproximate Minimum-Energy Multicasting in Wireless Ad Hoc Networks Weifa Liang, Senior Member, IEEE Abstract--A wireless ad hoc network consists of mobile nodes that are equipped with energy
Asymptotically minimum BER linear block precoders for MMSE equalisation
Davidson, Tim
) [3]. For a general block transmission scheme, optimal detection requires a joint decisionAsymptotically minimum BER linear block precoders for MMSE equalisation S.S. Chan, T.N. Davidson and K.M. Wong Abstract: An asymptotically minimum bit error rate (BER) linear block precoder
Approximating the Minimum Spanning Tree Weight in Sublinear Time
Goldwasser, Shafi
Approximating the Minimum Spanning Tree Weight in Sublinear Time #3; Bernard Chazelle y Ronitt a parameter 0 minimum span- ning tree in the graph and then grows \\local spanning trees" whose sizes are speci#12;ed by a stochastic process. From
Polynomial Time Algorithms for Minimum Energy Scheduling Philippe Baptiste1
Chrobak, Marek
algorithm for computing the minimum energy schedule when all jobs have unit length. 1 Introduction PowerPolynomial Time Algorithms for Minimum Energy Scheduling Philippe Baptiste1 , Marek Chrobak2 policies is to reduce the amount of energy consumed by computer systems while maintaining satisfactory
Constraint Satisfaction Via Partially Parallel Propagation Steps
Walter Hower Institut; Walter Hower
1992-01-01T23:59:59.000Z
to variables according to existing constraints. Given n variables with n-tuples which represents the globally consistent solution. This article presents a parallel approach to global constraint satisfaction. 0
Planck constraints on holographic dark energy
Li, Miao; Zhang, Zhenhui [Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China); Li, Xiao-Dong [Korea Institute for Advanced Study, Hoegiro 87, Dongdaemun-Gu, Seoul 130-722 (Korea, Republic of); Ma, Yin-Zhe [Department of Physics and Astronomy, University of British Columbia, Vancouver, V6T 1Z1, BC Canada (Canada); Zhang, Xin, E-mail: mli@itp.ac.cn, E-mail: xiaodongli@kias.re.kr, E-mail: mayinzhe@phas.ubc.ca, E-mail: zhangxin@mail.neu.edu.cn, E-mail: zhangzhh@itp.ac.cn [College of Sciences, Northeastern University, Shenyang 110004 (China)
2013-09-01T23:59:59.000Z
We perform a detailed investigation on the cosmological constraints on the holographic dark energy (HDE) model by using the Plank data. We find that HDE can provide a good fit to the Plank high-l (l ?> 40) temperature power spectrum, while the discrepancy at l ? 20-40 found in the ?CDM model remains unsolved in the HDE model. The Plank data alone can lead to strong and reliable constraint on the HDE parameter c. At the 68% confidence level (CL), we obtain c = 0.508 ± 0.207 with Plank+WP+lensing, favoring the present phantom behavior of HDE at the more than 2? CL. By combining Plank+WP with the external astrophysical data sets, i.e. the BAO measurements from 6dFGS+SDSS DR7(R)+BOSS DR9, the direct Hubble constant measurement result (H{sub 0} = 73.8 ± 2.4 kms{sup ?1}Mpc{sup ?1}) from the HST, the SNLS3 supernovae data set, and Union2.1 supernovae data set, we get the 68% CL constraint results c = 0.484 ± 0.070, 0.474 ± 0.049, 0.594 ± 0.051, and 0.642 ± 0.066, respectively. The constraints can be improved by 2%-15% if we further add the Plank lensing data into the analysis. Compared with the WMAP-9 results, the Plank results reduce the error by 30%-60%, and prefer a phantom-like HDE at higher significant level. We also investigate the tension between different data sets. We find no evident tension when we combine Plank data with BAO and HST. Especially, we find that the strong correlation between ?{sub m}h{sup 3} and dark energy parameters is helpful in relieving the tension between the Plank and HST measurements. The residual value of ?{sup 2}{sub Plank+WP+HST}??{sup 2}{sub Plank+WP} is 7.8 in the ?CDM model, and is reduced to 1.0 or 0.3 if we switch the dark energy to w model or the holographic model. When we introduce supernovae data sets into the analysis, some tension appears. We find that the SNLS3 data set is in tension with all other data sets; for example, for the Plank+WP, WMAP-9 and BAO+HST, the corresponding ??{sup 2} is equal to 6.4, 3.5 and 4.1, respectively. As a comparison, the Union2.1 data set is consistent with these three data sets, but the combination Union2.1+BAO+HST is in tension with Plank+WP+lensing, corresponding to a large ??{sup 2} that is equal to 8.6 (1.4% probability). Thus, combining internal inconsistent data sets (SNIa+BAO+HST with Plank+WP+lensing) can lead to ambiguous results, and it is necessary to perform the HDE data analysis for each independent data sets. Our tightest self-consistent constraint is c = 0.495 ± 0.039 obtained from Plank+WP+BAO+HST+lensing.
Phase Space Constraints on Neutrino Luminosities
C. Sivaram; Kenath Arun; Samartha C A
2007-06-29T23:59:59.000Z
While the importance of phase space constraints for gravitational clustering of neutrinos (which are fermions) is well recognized, the explicit use of such constraints to limit neutrino emission from ultra energetic sources has not been stressed. Special and general relativistic phase space constraints are shown to limit neutrino luminosities in compact sources in various situations.
Beta Reduction Constraints Manuel Bodirsky Katrin Erk
Paris-Sud XI, UniversitÃ© de
Beta Reduction Constraints Manuel Bodirsky Katrin Erk Alexander Koller Joachim Niehren Programming partially. In this paper, we introduce beta reduction constraints to describe beta reduction steps between partially known lambda terms. We show that beta reduction constraints can be expressed in an extension
ACLP: Integrating Abduction and Constraint Solving \\Lambda
Kakas, Antonis C.
ACLP: Integrating Abduction and Constraint Solving \\Lambda Antonis Kakas 75 Kallipoleos St. CYÂ1678, Nicosia, Cyprus. Email: antonis@cs.ucy.ac.cy Abstract ACLP is a system which combines abductive reasoning and constraint solving by integrating the frameworks of Abductive Logic Programming (ALP) and Constraint Logic
California at Santa Cruz, University of
Tanagra: Reactive Planning and Constraint Solving for Mixed-Initiative Level Design Gillian Smith, Student underlying architecture that integrates reactive planning and numerical constraint solving, and an evaluation planning with nu- merical constraint solving, and an evaluation of the expressivity of the system
Reconciling Nuclear and Astrophysical Constraints
Dexheimer, V; Schramm, S
2015-01-01T23:59:59.000Z
In view of new constraints put forth by recent observations and measurements in the realm of astrophysics and nuclear physics, we update the non-linear realization of the sigma model as to reflect such constraints. By doing this, we obtain new equations of state that may be used to describe neutron stars. Such equations of state are obtained by investigating different ways by which the vector mesons self-interact. Furthermore, we also investigate the role played by the delta mesons in the model. As a result, we are able to develop equations of state that are in better agreement with data, such as nuclear compressibility and slope of the symmetry energy at saturation, star masses, radii, and cooling profiles.
Constraints on Neutrino Velocities Revisited
Yunjie Huo; Tianjun Li; Yi Liao; Dimitri V. Nanopoulos; Yonghui Qi
2012-01-27T23:59:59.000Z
With a minimally modified dispersion relation for neutrinos, we reconsider the constraints on superluminal neutrino velocities from bremsstrahlung effects in the laboratory frame. Employing both the direct calculation approach and the virtual Z-boson approach, we obtain the generic decay width and energy loss rate of a superluminal neutrino with general energy. The Cohen-Glashow's analytical results for neutrinos with a relatively low energy are confirmed in both approaches. We employ the survival probability instead of the terminal energy to assess whether a neutrino with a given energy is observable or not in the OPERA experiment. Moreover, using our general results we perform systematical analyses on the constraints arising from the Super-Kamiokande and IceCube experiments.
Specified assurance level sampling procedure
Willner, O.
1980-11-01T23:59:59.000Z
In the nuclear industry design specifications for certain quality characteristics require that the final product be inspected by a sampling plan which can demonstrate product conformance to stated assurance levels. The Specified Assurance Level (SAL) Sampling Procedure has been developed to permit the direct selection of attribute sampling plans which can meet commonly used assurance levels. The SAL procedure contains sampling plans which yield the minimum sample size at stated assurance levels. The SAL procedure also provides sampling plans with acceptance numbers ranging from 0 to 10, thus, making available to the user a wide choice of plans all designed to comply with a stated assurance level.
Robust Precoder for Multiuser MISO Downlink with SINR Constraints
Ubaidulla, P
2008-01-01T23:59:59.000Z
In this paper, we consider linear precoding with SINR constraints for the downlink of a multiuser MISO (multiple-input single-output) communication system in the presence of imperfect channel state information (CSI). The base station is equipped with multiple transmit antennas and each user terminal is equipped with a single receive antenna. We propose a robust design of linear precoder which transmits minimum power to provide the required SINR at the user terminals when the true channel state lies in a region of a given size around the channel state available at the transmitter. We show that this design problem can be formulated as a Second Order Cone Program (SOCP) which can be solved efficiently. We compare the performance of the proposed design with some of the robust designs reported in the literature. Simulation results show that the proposed robust design provides better performance with reduced complexity.
Constraints on extra dimensions from precision molecular spectroscopy
Salumbides, E J; Gato-Rivera, B; Ubachs, W
2015-01-01T23:59:59.000Z
Accurate investigations of quantum level energies in molecular systems are shown to provide a test ground to constrain the size of compactified extra dimensions. This is made possible by the recent progress in precision metrology with ultrastable lasers on energy levels in neutral molecular hydrogen (H$_2$, HD and D$_2$) and the molecular hydrogen ions (H$_2^+$, HD$^+$ and D$_2^+$). Comparisons between experiment and quantum electrodynamics calculations for these molecular systems can be interpreted in terms of probing large extra dimensions, under which conditions gravity will become much stronger. Molecules are a probe of space-time geometry at typical distances where chemical bonds are effective, i.e. at length scales of an \\AA. Constraints on compactification radii for extra dimensions are derived within the Arkani-Hamed-Dimopoulos-Dvali framework, while constraints for curvature or brane separation are derived within the Randall-Sundrum framework. Based on the molecular spectroscopy of D$_2$ molecules an...
Tree-ring reconstruction of maximum and minimum temperatures
, minimum temperatures, diurnal temperature range, changing tree-ring/climate relationships, b; Vaganov et al. 1999; Bar- ber et al. 2000; Lloyd, Fastie 2002). Similar changes during investigations of tree- ring growth/climate relationships in interior British Columbia (BC
Minimum Purchase Price Regulations (Prince Edward Island, Canada)
Broader source: Energy.gov [DOE]
The Minimum Purchase Price Regulations establish the price which utilities must pay for power produced by large-scale renewable energy generators – that is those capable of producing more than 100...
Optimization Online - On the complexity of maximizing the minimum ...
Mikael Fallgren
2010-01-18T23:59:59.000Z
Jan 18, 2010 ... ... minimum total Shannon capacity of any mobile user in the system. ... Category 1: Applications -- OR and Management Sciences (Telecommunications ) ... Address: Department of Mathematics, Royal Institute of Technology, ...
Planning of Minimum-Time Trajectories for Robot Arms
Sahar, Gideon
1984-11-01T23:59:59.000Z
The minimum-time for a robot arm has been a longstanding and unsolved problem of considerable interest. We present a general solution to this problem that involves joint-space tesselation, a dynamic time-scaling ...
Theoretical Minimum Energy Use of a Building HVAC System
Tanskyi, O.
2011-01-01T23:59:59.000Z
This paper investigates the theoretical minimum energy use required by the HVAC system in a particular code compliant office building. This limit might be viewed as the "Carnot Efficiency" for HVAC system. It assumes that all ventilation and air...
affecting minimum alveolar: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
close to the observed minimum mass. The Hubble mass can also be predicted. It is suggested that assumption 1 above could be tested using a cyclotron to accelerate particles...
TOWARD THE MINIMUM INNER EDGE DISTANCE OF THE HABITABLE ZONE
Zsom, Andras
We explore the minimum distance from a host star where an exoplanet could potentially be habitable in order not to discard close-in rocky exoplanets for follow-up observations. We find that the inner edge of the Habitable ...
Upper bounds on minimum distance of nonbinary quantum stabilizer codes
Kumar, Santosh
2005-11-01T23:59:59.000Z
The most popular class of quantum error correcting codes is stabilizer codes. Binary quantum stabilizer codes have been well studied, and Calderbank, Rains, Shor and Sloane (July 1998) have constructed a table of upper bounds on the minimum distance...
Minimum Stream Flow and Water Sale Contracts (Indiana)
Broader source: Energy.gov [DOE]
The Indiana Natural Resources Commission may provide certain minimum quantities of stream flow or sell water on a unit pricing basis for water supply purposes from the water supply storage in...
The First Lunar Ranging Constraints on Gravity Sector SME Parameters
James B. R. Battat; John F. Chandler; Christopher Stubbs
2007-10-03T23:59:59.000Z
We present the first constraints on pure-gravity sector Standard-Model Extension (SME) parameters using Lunar Laser Ranging (LLR). LLR measures the round trip travel time of light between the Earth and the Moon. With 34+ years of LLR data, we have constrained six independent linear combinations of SME parameters at the level of $10^{-6}$ to $10^{-11}$. There is no evidence for Lorentz violation in the LLR dataset.
Polynomial Time Algorithms for Minimum Energy Scheduling
Baptiste, Philippe; Durr, Christoph
2009-01-01T23:59:59.000Z
The aim of power management policies is to reduce the amount of energy consumed by computer systems while maintaining satisfactory level of performance. One common method for saving energy is to simply suspend the system during the idle times. No energy is consumed in the suspend mode. However, the process of waking up the system itself requires a certain fixed amount of energy, and thus suspending the system is beneficial only if the idle time is long enough to compensate for this additional energy expenditure. In the specific problem studied in the paper, we have a set of jobs with release times and deadlines that need to be executed on a single processor. Preemptions are allowed. The processor requires energy L to be woken up and, when it is on, it uses one unit of energy per one unit of time. It has been an open problem whether a schedule minimizing the overall energy consumption can be computed in polynomial time. We solve this problem in positive, by providing an O(n^5)-time algorithm. In addition we pr...
Towards consistent Electroweak Precision Data constraints in the SMEFT
Laure Berthier; Michael Trott
2015-02-09T23:59:59.000Z
We discuss the impact of many previously neglected effects of higher dimensional operators when fitting to Electroweak Precision data (EWPD) in the Standard Model Effective Field Theory (SMEFT). We calculate the general case of $2 \\rightarrow 2$ fermion scattering in the SMEFT to order $\\mathcal{O}(\\bar{v}_T^2/\\Lambda^2)$ valid on and off the $Z$ pole, in the massless fermion limit. We demonstrate that previously neglected corrections scale as $\\Gamma_Z M_Z/\\bar{v}_T^2$ in the partial widths extracted from measured cross sections at LEPI, compared to the leading effect of dimension six operators in anomalous $Z$ couplings. Further, constraints on leading effects of anomalous $Z$ couplings are also modified by neglected perturbative corrections and dimension eight operators. We perform a minimal EWPD fit to illustrate the size of the error these corrections induce, when bounding leading effects. These considerations relax bounds compared to a naive leading order analysis, and show that constraints that rise above the percent level are subject to substantial theoretical uncertanties. We also argue that renormalization group running global constraints expressed through $\\chi^2$ functions to a common scale, and then minimizing and performing a global fit of all data allows more consistent constraints to be obtained in the SMEFT.
Initial value constraints with tensor matter
Ted Jacobson
2011-08-06T23:59:59.000Z
In generally covariant metric gravity theories with tensor matter fields, the initial value constraint equations, unlike in general relativity, are in general not just the 0\\mu-components of the metric field equation. This happens because higher derivatives can occur in the matter stress tensor. A universal form for these constraints is derived here from a generalized Bianchi identity that includes matter fields. As an application, the constraints for Einstein-aether theory are found.
Performance, Market and Manufacturing Constraints relevant to...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Constraints relevant to the Industrialization of Thermoelectric Devices Market pricing of thermoelectric raw materials and processing, cost of manufacture of devices and...
NREL: Jobs and Economic Competitiveness - Supply Constraints...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Supply Constraints Analysis Some of the materials used in solar PV modules, such as tellurium and indium, are rare materials in limited supply. Solar PV technologies have grown...
Stochastic Mathematical Programs with Equilibrium Constraints ...
2005-06-25T23:59:59.000Z
to a class of stochastic mathematical programs with variational (equilibrium) constraints. To this end .... A random (or rather pseudo-random) sam- ple ?1,··· ,?N of ...
Constraints of Dark Energy at High Redshift
Qiping Su; Rong-Gen Cai
2014-08-24T23:59:59.000Z
Constrains of dark energy (DE) at high redshift from current and mock future observational data are obtained. It is found that present data give poor constraints of DE even beyond redshift z=0.4, and mock future 2298 type Ia supernove data only give a little improvement of the constraints. We analyze in detail why constraints of DE decrease rapidly with the increasing of redshift. Then we try to improve the constraints of DE at high redshift. It is shown that the most efficient way is to improve the error of observations.
FROM TRANSACTIONAL SPATIAL DATABASES INTEGRITY CONSTRAINTS TO SPATIAL DATACUBES INTEGRITY, Sherbrooke, Canada - brodeur@nrcan.gc.ca KEY WORDS: Integrity Constraint, Spatial Datacube, Spatio technology (SOLAP). They are aimed at supporting Geographic Knowledge Discovery (GKD) as well as certain
Minimum carbon tax level needed to prompt a widespread shift to nuclear power
Thornton, Katherine C. (Katherine Claire)
2007-01-01T23:59:59.000Z
Carbon dioxide is suspected to be a major contributor to global warming. In the United States, nearly 70% of electricity is produced using coal or natural gas, both of which emit carbon dioxide into the environment. Nuclear ...
Nicaragua: Accin Mdica Cristiana 8-week minimum and Intermediate Spanish level
Bushman, Frederic
of health models that are appropriate to the needs of poor, remote, multicultural communities, and a model (nutrition and agricultural sustainability), HIV-AIDS prevention, clean water and sanitation, disaster such as health brigades, developing sanitation projects, potable water, and a variety of nutrition and other
The Kauffman Constraint Coefficients Kw
Kenneth A. Griggs
2011-10-27T23:59:59.000Z
The Kauffman Constraint Coefficients Kw and their corresponding Elementals Ew are presented as solutions to the construction of the (beta)-derivative of Kauffman's Theta-function. Additionally, a new recursion relation is provided to construct the (beta)-derivative of Theta that requires only operational substitutions and summations; this algorithmically simplifies Kauffman's original technique. To demonstrate Kw, we generate the 30 Kw Coefficients from the corresponding Elementals Ew for the (9)-derivative of Theta and find that our results are in complete agreement with Kauffman's Mathematica\\texttrademark solutions. We further present a calculation of two coefficients for the (12)-derivative of Theta and invite readers to use Mathematica\\texttrademark or any other means to calculate and verify our results. Finally, we present a challenging calculation for a coefficient of the (40)-derivative of Theta; owing to the vast numbers of permutations involved, a Mathematica\\texttrademark approach may require substantial computer resources to obtain the solution in a reasonable time.
E-Print Network 3.0 - antagonists minimum safety Sample Search...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
minimum safety Search Powered by Explorit Topic List Advanced Search Sample search results for: antagonists minimum safety Page: << < 1 2 3 4 5 > >> 1 Microscopic Kinetics and...
The minimum distance of classical and quantum turbo-codes
Abbara, Mamdouh
2011-01-01T23:59:59.000Z
We present a theory of quantum stabilizer turbo-encoders with unbounded minimum distance. This theory is presented under a framework common to both classical and quantum turbo-encoding theory. The main conditions to have an unbounded minimum distance are that the inner seed encoder has to be recursive, and either systematic or with a totally recursive truncated decoder. This last condition has been introduced in order to obtain a theory viable in the quantum stabilizer case, since it was known that in this case the inner seed encoder could not be recursive and systematic in the same time.
The minimum distance of classical and quantum turbo-codes
Mamdouh Abbara; Jean-Pierre Tillich
2011-09-01T23:59:59.000Z
We present a theory of quantum stabilizer turbo-encoders with unbounded minimum distance. This theory is presented under a framework common to both classical and quantum turbo-encoding theory. The main conditions to have an unbounded minimum distance are that the inner seed encoder has to be recursive, and either systematic or with a totally recursive truncated decoder. This last condition has been introduced in order to obtain a theory viable in the quantum stabilizer case, since it was known that in this case the inner seed encoder could not be recursive and systematic in the same time.
Iterative Speech Enhancement With Spectral Constraints
Texas at Dallas, University of
Iterative Speech Enhancement With Spectral Constraints John H. Hansen and Mark A. Clements Georgia iterative speech enhancementtechnique based on spectral constraints is presented in this paper estimate of a speech waveform in additive white noise. Thenew approach applies inter- and intra
Editing Nested Constraints and Application Conditions
Habel, Annegret
Editing Nested Constraints and Application Conditions Karl Azab Carl v. Ossietzky UniversitÂ¨at Oldenburg, Germany azab@informatik.uni-oldenburg.de Abstract. Nested constraints and application conditions to get these editing features and implemented a tree-oriented visualization for editing nested constrains
Fundamental constraints on the abundances of chemotaxis proteins
Bitbol, Anne-Florence
2015-01-01T23:59:59.000Z
Flagellated bacteria, such as Escherichia coli, perform directed motion in gradients of concentration of attractants and repellents in a process called chemotaxis. The E. coli chemotaxis signaling pathway is a model for signal transduction, but it has unique features. We demonstrate that the need for fast signaling necessitates high abundances of the proteins involved in this pathway. We show that further constraints on the abundances of chemotaxis proteins arise from the requirements of self-assembly, both of flagellar motors and of chemoreceptor arrays. All these constraints are specific to chemotaxis, and published data confirm that chemotaxis proteins tend to be more highly expressed than their homologs in other pathways. Employing a chemotaxis pathway model, we show that the gain of the pathway at the level of the response regulator CheY increases with overall chemotaxis protein abundances. This may explain why, at least in one E. coli strain, the abundance of all chemotaxis proteins is higher in media w...
Planning for environmental constraints on the PJM system
Not Available
1994-07-15T23:59:59.000Z
This chapter provides a snapshot of the existing PJM system and identifies the environmental constraints that form the parameters for the regional approaches analyzed in this study. The chapter begins with a description of the PJM system and the costs and emissions levels of the pollutants under study associated with the reference case (the PJM system configured to meet only Clean Air Act Amendment Phase I SO{sub 2} requirements and the March 1994 NO{sub x} requirements affecting Phase I units){sup 3}. Next, the pollution-reduction scenario assumed for the purpose of the study, which covers the period 1995--2010, is described. Finally, the impacts of this pollution reduction scenario -- emissions that would need to be avoided on the reference case PJM system -- are identified. Modeling methods are described alongside the study`s results. Other chapters discuss: environmental constraints, alternate plans to achieve environmental goals, and comparison of alternate plans.
Apparatus and method for closed-loop control of reactor power in minimum time
Bernard, Jr., John A. (72 Paul Revere Rd., Needham Heights, MA 02194)
1988-11-01T23:59:59.000Z
Closed-loop control law for altering the power level of nuclear reactors in a safe manner and without overshoot and in minimum time. Apparatus is provided for moving a fast-acting control element such as a control rod or a control drum for altering the nuclear reactor power level. A computer computes at short time intervals either the function: .rho.=(.beta.-.rho.).omega.-.lambda..sub.e '.rho.-.SIGMA..beta..sub.i (.lambda..sub.i -.lambda..sub.e ')+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e '.omega.] or the function: .rho.=(.beta.-.rho.).omega.-.lambda..sub.e .rho.-(.lambda..sub.e /.lambda..sub.e)(.beta.-.rho.)+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e .omega.-(.lambda..sub.e /.lambda..sub.e).omega.] These functions each specify the rate of change of reactivity that is necessary to achieve a specified rate of change of reactor power. The direction and speed of motion of the control element is altered so as to provide the rate of reactivity change calculated using either or both of these functions thereby resulting in the attainment of a new power level without overshoot and in minimum time. These functions are computed at intervals of approximately 0.01-1.0 seconds depending on the specific application.
Implementing Minimum Cycle Basis algorithms Kurt Mehlhorn and Dimitrios Michail
Mehlhorn, Kurt
Implementing Minimum Cycle Basis algorithms Kurt Mehlhorn and Dimitrios Michail Max consider the problem of computing a mini- mum cycle basis of an undirected graph G = (V, E) with n vertices in a significant speedup. Based on our experimental observations, we combine the two fundamen- tally different
Effect of mechanical parameters on dielectric elastomer minimum energy structures
Floreano, Dario
Effect of mechanical parameters on dielectric elastomer minimum energy structures Jun Shintake energy structures Jun Shintake*a,b , Samuel Rosseta , Dario Floreanob , Herbert R. Sheaa a Microsystems for Space Technologies Laboratory, Ecole Polytechnique FÃ©dÃ©rale de Lausanne (EPFL), NeuchÃ¢tel, Switzerland b
A minimum entropy principle of high order schemes for gas ...
2011-09-15T23:59:59.000Z
The entropy solutions of the compressible Euler equations satisfy a minimum principle for the specific ... where ? is the density, u is the velocity, m is the momentum, E is the total energy and p is the pressure. ... can enforce this condition without destroying conservation. .... achieved under a standard CFL condition ? (|u| + c) ...
On the Minimum Load Coloring Problem --Extended Abtract--
Doerr, Benjamin
# such that the maximum load, l # := max{r# , b #}, is minimized. In the following we shall skip the term ``maximumOn the Minimum Load Coloring Problem --Extended Abtract-- Nitin Ahuja 1 , Andreas Baltz 2 Abstract. Given a graph G = (V, E) with n vertices, m edges and maximum vertex degree #, the load
Predicting Daily Net Radiation Using Minimum Climatological Data1
Predicting Daily Net Radiation Using Minimum Climatological Data1 S. Irmak, M.ASCE2 ; A. Irmak3 ; J for predicting daily Rn have been widely used. However, when the paucity of detailed climatological data with National Weather Service climatological datasets that only record Tmax and Tmin on a regular basis. DOI: 10
Optimizing rotational acceleration curves for minimum energy use in electric
Ruina, Andy L.
Optimizing rotational acceleration curves for minimum energy use in electric motors. 12/15/06 Fall the optimal efficiency of a motor for any input values of motor constants, distance, or time. In every of the inspiration to find which rotational acceleration curve for the used motors would be most efficient. We really
Localized Minimum-Energy Broadcasting for Wireless Multihop Networks
Stojmenovic, Ivan
tree. We then observe that, for very dense networks, it is more energy-efficient to reach more than oneLocalized Minimum-Energy Broadcasting for Wireless Multihop Networks with Directional Antennas, and Carmen M. Yago Abstract--There are a number of proposals to achieve energy-efficient broadcasting
Minimum-Hot-Spot Query Trees for Wireless Sensor Networks
Zeinalipour, Demetris
an energy- efficient query routing tree. (a) Energy harvesting for battery- less nodes for the (b) Voltree to the querying node. Energy-efficient query routing trees are needed in a plethora of systems such as PeopleMinimum-Hot-Spot Query Trees for Wireless Sensor Networks Georgios Chatzimilioudis Dept
The"minimum information about an environmental sequence" (MIENS) specification
Yilmaz, P.; Kottmann, R.; Field, D.; Knight, R.; Cole, J.R.; Amaral-Zettler, L.; Gilbert, J.A.; Karsch-Mizrachi, I.; Johnston, A.; Cochrane, G.; Vaughan, R.; Hunter, C.; Park, J.; Morrison, N.; Rocca-Serra, P.; Sterk, P.; Arumugam, M.; Baumgartner, L.; Birren, B.W.; Blaser, M.J.; Bonazzi, V.; Bork, P.; Buttigieg, P. L.; Chain, P.; Costello, E.K.; Huot-Creasy, H.; Dawyndt, P.; DeSantis, T.; Fierer, N.; Fuhrman, J.; Gallery, R.E.; Gibbs, R.A.; Giglio, M.G.; Gil, I. San; Gonzalez, A.; Gordon, J.I.; Guralnick, R.; Hankeln, W.; Highlander, S.; Hugenholtz, P.; Jansson, J.; Kennedy, J.; Knights, D.; Koren, O.; Kuczynski, J.; Kyrpides, N.; Larsen, R.; Lauber, C.L.; Legg, T.; Ley, R.E.; Lozupone, C.A.; Ludwig, W.; Lyons, D.; Maguire, E.; Methe, B.A.; Meyer, F.; Nakieny, S.; Nelson, K.E.; Nemergut, D.; Neufeld, J.D.; Pace, N.R.; Palanisamy, G.; Peplies, J.; Peterson, J.; Petrosino, J.; Proctor, L.; Raes, J.; Ratnasingham, S.; Ravel, J.; Relman, D.A.; Assunta-Sansone, S.; Schriml, L.; Sodergren, E.; Spor, A.; Stombaugh, J.; Tiedje, J.M.; Ward, D.V.; Weinstock, G.M.; Wendel, D.; White, O.; Wikle, A.; Wortman, J.R.; Glockner, F.O.; Bushman, F.D.; Charlson, E.; Gevers, D.; Kelley, S.T.; Neubold, L.K.; Oliver, A.E.; Pruesse, E.; Quast, C.; Schloss, P.D.; Sinha, R.; Whitely, A.
2010-10-15T23:59:59.000Z
We present the Genomic Standards Consortium's (GSC) 'Minimum Information about an ENvironmental Sequence' (MIENS) standard for describing marker genes. Adoption of MIENS will enhance our ability to analyze natural genetic diversity across the Tree of Life as it is currently being documented by massive DNA sequencing efforts from myriad ecosystems in our ever-changing biosphere.
Jamming-Aware Minimum Energy Routing in Wireless Networks
Goeckel, Dennis L.
1 Jamming-Aware Minimum Energy Routing in Wireless Networks Azadeh Sheikholeslami, Majid Ghaderi; however, energy-aware routing in the presence of active adversary (jammers) has not been considered. We. There has been some study of energy-aware ad hoc routing protocols in the literature [13], [14], [15], [16
BLIND DECONVOLUTION WITH MINIMUM RENYI'S ENTROPY Deniz Erdogmus1
Slatton, Clint
BLIND DECONVOLUTION WITH MINIMUM RENYI'S ENTROPY Deniz Erdogmus1 , Jose C. Principe1 , Luis Vielva2-mail: [deniz , principe]@cnel.ufl.edu, luis@dicom.unican.es ABSTRACT Blind techniques attract the attention, from communications to control systems. Blind deconvolution is a problem that has been investigated
Interior Architecture Minor Tracking Sheet Total Minimum Credits: 26
Interior Architecture Minor Tracking Sheet Total Minimum Credits: 26 Minor standing is prerequisite architecture studio course is required for architecture majors enrolled in the interior architecture minor (1 is required for Architecture majors): IARC 484 Interior Design Studio (6), IARC 486 Furniture
Architecture Minor Tracking Sheet Total Minimum Credits: 26
Architecture Minor Tracking Sheet Total Minimum Credits: 26 Minor standing is prerequisite Notes: Required courses in one's major will not count for the minor with one exception: 1 architecture studio course is required for interior architecture majors enrolled in the architecture minor, and this studio
Optimum Wire Tapering for Minimum Power Dissipation in RLC Interconnects
Friedman, Eby G.
tapering is shown to reduce the (a CMOS inverter) with the driver (a CMOS inverter). The power dissipatedOptimum Wire Tapering for Minimum Power Dissipation in RLC Interconnects Magdy A. El-Moursy and Eby G. Friedman Department of Electrical and Computer Engineering University of Rochester Rochester, New
Reaction Path Optimization with Holonomic Constraints and Kinetic Energy Potentials
Brokaw, Jason B.; Haas, Kevin R.; Chu, Jhih-wei
2009-08-11T23:59:59.000Z
Two methods are developed to enhance the stability, efficiency, and robustness of reaction path optimization using a chain of replicas. First, distances between replicas are kept equal during path optimization via holonomic constraints. Finding a reaction path is, thus, transformed into a constrained optimization problem. This approach avoids force projections for finding minimum energy paths (MEPs), and fast-converging schemes such as quasi-Newton methods can be readily applied. Second, we define a new objective function - the total Hamiltonian - for reaction path optimization, by combining the kinetic energy potential of each replica with its potential energy function. Minimizing the total Hamiltonian of a chain determines a minimum Hamiltonian path (MHP). If the distances between replicas are kept equal and a consistent force constant is used, then the kinetic energy potentials of all replicas have the same value. The MHP in this case is the most probable isokinetic path. Our results indicate that low-temperature kinetic energy potentials (<5 K) can be used to prevent the development of kinks during path optimization and can significantly reduce the required steps of minimization by 2-3 times without causing noticeable differences between a MHP and MEP. These methods are applied to three test cases, the C?eq-to-Cax isomerization of an alanine dipeptide, the ?C?- to-¹C? transition of an ?-D-glucopyranose, and the helix-to-sheet transition of a GNNQQNY heptapeptide. By applying the methods developed in this work, convergence of reaction path optimization can be achieved for these complex transitions, involving full atomic details and a large number of replicas (>100). For the case of helix-to-sheet transition, we identify pathways whose energy barriers are consistent with experimental measurements. Further, we develop a method based on the work energy theorem to quantify the accuracy of reaction paths and to determine whether the atoms used to define a path are enough to provide quantitative estimation of energy barriers.
Robust Branch-Cut-and-Price for the Capacitated Minimum ...
2006-05-20T23:59:59.000Z
independently noted that cuts expressed in terms of variables from a suitable original ... The In-Degree constraints (1b) state that exactly one arc must enter each ...... of promising sets S, and (ii) the search for violated cuts by considering the ...
Complexity of Minimum Irreducible Infeasible Subsystem Covers for ...
Imke Joormann
2015-03-07T23:59:59.000Z
flow bounds represent capacity constraints, e.g., corresponding to a pipeline ... Figure 1: Sketch of the construction for the reduction; l ? 0, u = 1 for solid, u = ? for .... time by Moshkovitz [27], also carries over to the ICF and the min shift design ...
Regulatory constraints on executive compensation
Joskow, Paul L.
1993-01-01T23:59:59.000Z
This paper explores the influence of economic regulation on the level and structure of executive compensation. We find substantial and persistent differences in CEO compensation between firms subject to economic regulation ...
CONSTRAINT EFFECT IN FRACTURE WHAT IS IT
Lam, P; Prof. Yuh J. Chao, P
2008-10-29T23:59:59.000Z
The meaning of the phrase 'constraint effect in fracture' has changed in the past two decades from 'contained plasticity' to a broader description of 'dependence of fracture toughness value on geometry of test specimen or structure'. This paper will first elucidate the fundamental mechanics reasons for the apparent 'constraint effects in fracture', followed by outlining a straightforward approach to overcoming this problem in both brittle (elastic) and ductile (elastic-plastic) fracture. It is concluded by discussing the major difference in constraint effect on fracture event in elastic and elastic-plastic materials.
Constraint of DNA on Functionalized Graphene Improves Its Biostability...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Constraint of DNA on Functionalized Graphene Improves Its Biostability and Specificity. Constraint of DNA on Functionalized Graphene Improves Its Biostability and Specificity....
A note on the expected probability of constraint v...
2008-07-23T23:59:59.000Z
Page 1 ... this topic): V = expected number of support constraints. 1 + number of constraints . This result (Theorem 1) is obtained using a simple technique based
The Design of Shape from Motion Constraints
Caine, Michael E.
1993-09-01T23:59:59.000Z
This report presents a set of representations methodologies and tools for the purpose of visualizing, analyzing and designing functional shapes in terms of constraints on motion. The core of the research is an interactive ...
Constraint Programming for Hierarchical Resource Allocation
Reif, Wolfgang
of power plants are instances of tasks that can benefit tremendously from a self-organizing structure state by solving a constraint satisfaction problem (CSP). In this work, we emphasize a particular
Workflow Collaboration with Constraint Solving Capabilities
Chen-Burger, Y-H; Hui, K; Preece, A D; Gray, P.M.D; Tate, Austin
, perform specialised tasks and achieve common goals. We give an account of our approach for the workflow assisted collaboration with a specialised knowledge agent. In this case, a system with constraint solving capabilities. We found that systems built...
Multiple Vehicle Routing Problem with Fuel Constraints
Levy, David
2013-06-26T23:59:59.000Z
In this paper, a Multiple Vehicle Routing Problem with Fuel Constraints (MVRPFC) is considered. This problem consists of a field of targets to be visited, and a collection of vehicles with fuel tanks that may visit the targets. Consideration...
Investigation of a minimum energy Earth-Mars trajectory
Brown, Richard Emett
1967-01-01T23:59:59.000Z
INVESTIGATION OF A MINIMUM ENERGY EARTH-MARS TRAJECTORY A Thesis by Richard Emmett grown Submitted to the Graduate Co11ege of the Texas ASM University in partia1 fulfi11ment of the requirements for the degree of MASTER OF SCIENCE May 1967... Major Subject: Aerospace Engineering INVESTIGATION OF A MINIMIIM ENERGy EARTH MARS TRAJECTORy A Thesis by Richard Emmett Brown Approved as to style and content by; (Co-chairman of Committee) (Head of Department) (Member) May I967 TABLE...
Constraints on flow regimes in wide-aperture fractures
Ghezzehei, Teamrat A.
2004-02-28T23:59:59.000Z
In recent years, significant advances have been made in our understanding of the complex flow processes in individual fractures, aided by flow visualization experiments and conceptual modeling efforts. These advances have led to the recognition of several flow regimes in individual fractures subjected to different initial and boundary conditions. Of these, the most important regimes are film flow, rivulet flow, and sliding of droplets. The existence of such significantly dissimilar flow regimes has been a major hindrance in the development of self-consistent conceptual models of flow for single fractures that encompass all the flow regimes. The objective of this study is to delineate the existence of the different flow regimes in individual fractures. For steady-state flow conditions, we developed physical constraints on the different flow regimes that satisfy minimum energy configurations, which enabled us to segregate the wide range of fracture transmissivity (volumetric flow rate per fracture width) into several flow regimes. These are, in increasing order of flow rate, flow of adsorbed films, flow of sliding drops, rivulet flow, stable film flow, and unstable (turbulent) film flow. The scope of this study is limited to wide-aperture fractures with the flow on the opposing sides of fracture being independent.
GALACTIC COSMIC-RAY ENERGY SPECTRA AND COMPOSITION DURING THE 2009-2010 SOLAR MINIMUM PERIOD
Lave, K. A.; Binns, W. R.; Israel, M. H. [Department of Physics and the McDonnell Center for the Space Sciences, Washington University, St. Louis, MO 63130 (United States); Wiedenbeck, M. E. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Christian, E. R.; De Nolfo, G. A.; Von Rosenvinge, T. T. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Cummings, A. C.; Davis, A. J.; Leske, R. A.; Mewaldt, R. A.; Stone, E. C. [California Institute of Technology, Pasadena, CA 91125 (United States)
2013-06-20T23:59:59.000Z
We report new measurements of the elemental energy spectra and composition of galactic cosmic rays during the 2009-2010 solar minimum period using observations from the Cosmic Ray Isotope Spectrometer (CRIS) onboard the Advanced Composition Explorer. This period of time exhibited record-setting cosmic-ray intensities and very low levels of solar activity. Results are given for particles with nuclear charge 5 {<=} Z {<=} 28 in the energy range {approx}50-550 MeV nucleon{sup -1}. Several recent improvements have been made to the earlier CRIS data analysis, and therefore updates of our previous observations for the 1997-1998 solar minimum and 2001-2003 solar maximum are also given here. For most species, the reported intensities changed by less than {approx}7%, and the relative abundances changed by less than {approx}4%. Compared with the 1997-1998 solar minimum relative abundances, the 2009-2010 abundances differ by less than 2{sigma}, with a trend of fewer secondary species observed in the more recent time period. The new 2009-2010 data are also compared with results of a simple ''leaky-box'' galactic transport model combined with a spherically symmetric solar modulation model. We demonstrate that this model is able to give reasonable fits to the energy spectra and the secondary-to-primary ratios B/C and (Sc+Ti+V)/Fe. These results are also shown to be comparable to a GALPROP numerical model that includes the effects of diffusive reacceleration in the interstellar medium.
Some remarks on tree-level vacuum stability in two Higgs doublet models
A. Barroso; P. M. Ferreira; R. Santos
2005-07-29T23:59:59.000Z
It is proved that the minimum of a general two Higgs doublet models' potential is stable at tree level. A relation between stability and flavour changing neutral currents at tree level is shown.
Pecularities of cosmic ray modulation in the solar minimum 23/24
Alania, M V; Wawrzynczak, A
2015-01-01T23:59:59.000Z
We study changes of the galactic cosmic ray (GCR) intensity for the ending period of the solar cycle 23 and the beginning of the solar cycle 24 using neutron monitors experimental data. We show that an increase of the GCR intensity in 2009 is generally related with decrease of the solar wind velocity U, the strength B of the interplanetary magnetic field (IMF), and the drift in negative (Aneg) polarity epoch. We present that temporal changes of rigidity dependence of the GCR intensity variation before reaching maximum level in 2009 and after it, do not noticeably differ from each other. The rigidity spectrum of the GCR intensity variations calculated based on neutron monitors data (for rigidities greaten than 10 GV) is hard in the minimum and near minimum epoch. We do not recognize any non-ordinary changes in the physical mechanism of modulation of the GCR intensity in the rigidity range of GCR particles to which neutron monitors respond. We compose 2-D non stationary model of transport equation to describe v...
PAIRWISE BLENDING OF HIGH LEVEL WASTE (HLW)
CERTA, P.J.
2006-02-22T23:59:59.000Z
The primary objective of this study is to demonstrate a mission scenario that uses pairwise and incidental blending of high level waste (HLW) to reduce the total mass of HLW glass. Secondary objectives include understanding how recent refinements to the tank waste inventory and solubility assumptions affect the mass of HLW glass and how logistical constraints may affect the efficacy of HLW blending.
Electromagnetic field with constraints and Papapetrou equation
Z. Ya. Turakulov; A. T. Muminov
2006-01-12T23:59:59.000Z
It is shown that geometric optical description of electromagnetic wave with account of its polarization in curved space-time can be obtained straightforwardly from the classical variational principle for electromagnetic field. For this end the entire functional space of electromagnetic fields must be reduced to its subspace of locally plane monochromatic waves. We have formulated the constraints under which the entire functional space of electromagnetic fields reduces to its subspace of locally plane monochromatic waves. These constraints introduce variables of another kind which specify a field of local frames associated to the wave and contain some congruence of null-curves. The Lagrangian for constrained electromagnetic field contains variables of two kinds, namely, a congruence of null-curves and the field itself. This yields two kinds of Euler-Lagrange equations. Equations of first kind are trivial due to the constraints imposed. Variation of the curves yields the Papapetrou equations for a classical massless particle with helicity 1.
The impact of minimum age of employment regulation on child labor and schooling
Edmonds, Eric V
Promoting minimum age of employment regulation has been a centerpiece in child labor policy for the last 15 years. If enforced, minimum age regulation would change the age profile of paid child employment. Using micro-data ...
Minimum pressure envelope cavitation analysis using two-dimensional panel method
Peterson, Christopher J., S.M. Massachusetts Institute of Technology
2008-01-01T23:59:59.000Z
An analysis tool for calculating minimum pressure envelopes was developed using XFOIL. This thesis presents MATLAB® executables that interface with a modified version of XFOIL for determining the minimum pressure of a foil ...
Theoretical Minimum Energies to Produce Steel for Selected Conditions
Fruehan, R.J.; Fortini, O.; Paxton, H.W.; Brindle, R.
2000-05-01T23:59:59.000Z
The energy used to produce liquid steel in today's integrated and electric arc furnace (EAF) facilities is significantly higher than the theoretical minimum energy requirements. This study presents the absolute minimum energy required to produce steel from ore and mixtures of scrap and scrap alternatives. Additional cases in which the assumptions are changed to more closely approximate actual operating conditions are also analyzed. The results, summarized in Table E-1, should give insight into the theoretical and practical potentials for reducing steelmaking energy requirements. The energy values have also been converted to carbon dioxide (CO{sub 2}) emissions in order to indicate the potential for reduction in emissions of this greenhouse gas (Table E-2). The study showed that increasing scrap melting has the largest impact on energy consumption. However, scrap should be viewed as having ''invested'' energy since at one time it was produced by reducing ore. Increasing scrap melting in the BOF mayor may not decrease energy if the ''invested'' energy in scrap is considered.
Magnetic Flux Transport Simulations of Solar Surface Magnetic Distributions During a Grand Minimum.
Mackay, Duncan
, Scotland, KY16 9SS. Abstract. It is well known that magnetic activity on the Sun modulates from one cycle strongly depend on the phase of the cycle in which the grand minimum starts and whether it lasts for an odd or even number of cycles. If the grand minimum starts around cycle minimum then a signi#12;cant amount
Skogestad, Sigurd
Minimum Energy Consumption in Multicomponent Distillation. 3. More Than Three Products-component feed into M products has been derived. Interestingly, the minimum-energy solution in a complex solution of minimum energy for distillation of a multicomponent feed into multiple products has not been
A simple model for evolution of proteins towards the global minimum of free energy
Unger, Ron
A simple model for evolution of proteins towards the global minimum of free energy Tamar Kaffe-Abramovich and Ron Unger Background: Proteins seem to have their native structure in a global minimum of free energy is in the global minimum of free energy. The aim of this study is to investigate such evolutionary processes
Boyer, Edmond
Anomalous electron density events in the quiet summer ionosphere at solar minimum over Millstone region ionosphere over Millstone Hill with calculations from the IZMIRAN model for solar minimum layer. This phenomenon occurs frequently in the quiet ionosphere at solar minimum during summer
LANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS
California at Berkeley, University of
). The top three panels correspond to the southern segment of the solar minimum orbit; repeated passesLANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS R. J at the electron plasma frequency) during the solar minimum and solar maximum orbits of Ulysses. At high latitudes
An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network
Brown, Timothy X.
An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network Sheetalkumar Doshi the necessary features of an on-demand minimum energy routing protocol and suggests mechanisms the performance of an on-demand minimum energy routing protocol in terms of energy savings with an existing on
An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network
An On-demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network Sheetalkumar Doshi of an on-demand minimum energy routing protocol and suggests mechanisms for their imple- mentation. We of an on-demand minimum energy routing protocol in terms of energy savings with an existing on-demand ad
The turbulent cascade and proton heating in the solar wind during solar minimum
Coburn, Jesse T.; Smith, Charles W.; Vasquez, Bernard J. [Physics Department and Space Science Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, New Hampshire (United States); Stawarz, Joshua E. [Department of Astrophysical and Planetary Sciences, University of Colorado at Boulder, Boulder, Colorado (United States); Forman, Miriam A. [Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York (United States)
2013-06-13T23:59:59.000Z
Solar wind measurements at 1 AU during the recent solar minimum and previous studies of solar maximum provide an opportunity to study the effects of the changing solar cycle on in situ heating. Our interest is to compare the levels of activity associated with turbulence and proton heating. Large-scale shears in the flow caused by transient activity are a source that drives turbulence that heats the solar wind, but as the solar cycle progresses the dynamics that drive the turbulence and heat the medium are likely to change. The application of third-moment theory to Advanced Composition Explorer (ACE) data gives the turbulent energy cascade rate which is not seen to vary with the solar cycle. Likewise, an empirical heating rate shows no significan changes in proton heating over the cycle.
Zare, Richard N.
Reaction Products with Internal Energy beyond the Kinematic Limit Result from Trajectories Far from the minimum energy path are, in general, responsible for production of highly internally excited products-7 For this collision energy and product vibrational level, rotational states j e 18 are energetically allowed, but only
Observed Minimum Illuminance Threshold for Night Market Vendors in Kenya who use LED Lamps
Johnstone, Peter; Jacobson, Arne; Mills, Evan; Radecsky, Kristen
2009-03-21T23:59:59.000Z
Creation of light for work, socializing, and general illumination is a fundamental application of technology around the world. For those who lack access to electricity, an emerging and diverse range of LED based lighting products hold promise for replacing and/or augmenting their current fuel-based lighting sources that are costly and dirty. Along with analysis of environmental factors, economic models for total cost-ofownership of LED lighting products are an important tool for studying the impacts of these products as they emerge in markets of developing countries. One important metric in those models is the minimum illuminance demanded by end-users for a given task before recharging the lamp or replacing batteries. It impacts the lighting service cost per unit time if charging is done with purchased electricity, batteries, or charging services. The concept is illustrated in figure 1: LED lighting products are generally brightest immediately after the battery is charged or replaced and the illuminance degrades as the battery is discharged. When a minimum threshold level of illuminance is reached, the operational time for the battery charge cycle is over. The cost to recharge depends on the method utilized; these include charging at a shop at a fixed price per charge, charging on personal grid connections, using solar chargers, and purchasing dry cell batteries. This Research Note reports on the observed"charge-triggering" illuminance level threshold for night market vendors who use LED lighting products to provide general and task oriented illumination. All the study participants charged with AC power, either at a fixed-price charge shop or with electricity at their home.
Letschert, Virginie E.; McNeil, Michael A.; Leiva Ibanez, Francisco Humberto; Ruiz, Ana Maria; Pavon, Mariana; Hall, Stephen
2011-06-01T23:59:59.000Z
Minimum Efficiency Performance Standards (MEPS) have been chosen as part of Chile's national energy efficiency action plan. As a first MEPS, the Ministry of Energy has decided to focus on a regulation for lighting that would ban the sale of inefficient bulbs, effectively phasing out the use of incandescent lamps. Following major economies such as the US (EISA, 2007) , the EU (Ecodesign, 2009) and Australia (AS/NZS, 2008) who planned a phase out based on minimum efficacy requirements, the Ministry of Energy has undertaken the impact analysis of a MEPS on the residential lighting sector. Fundacion Chile (FC) and Lawrence Berkeley National Laboratory (LBNL) collaborated with the Ministry of Energy and the National Energy Efficiency Program (Programa Pais de Eficiencia Energetica, or PPEE) in order to produce a techno-economic analysis of this future policy measure. LBNL has developed for CLASP (CLASP, 2007) a spreadsheet tool called the Policy Analysis Modeling System (PAMS) that allows for evaluation of costs and benefits at the consumer level but also a wide range of impacts at the national level, such as energy savings, net present value of savings, greenhouse gas (CO2) emission reductions and avoided capacity generation due to a specific policy. Because historically Chile has followed European schemes in energy efficiency programs (test procedures, labelling program definitions), we take the Ecodesign commission regulation No 244/2009 as a starting point when defining our phase out program, which means a tiered phase out based on minimum efficacy per lumen category. The following data were collected in order to perform the techno-economic analysis: (1) Retail prices, efficiency and wattage category in the current market, (2) Usage data (hours of lamp use per day), and (3) Stock data, penetration of efficient lamps in the market. Using these data, PAMS calculates the costs and benefits of efficiency standards from two distinct but related perspectives: (1) The Life-Cycle Cost (LCC) calculation examines costs and benefits from the perspective of the individual household; and (2) The National Perspective projects the total national costs and benefits including both financial benefits, and energy savings and environmental benefits. The national perspective calculations are called the National Energy Savings (NES) and the Net Present Value (NPV) calculations. PAMS also calculate total emission mitigation and avoided generation capacity. This paper describes the data and methodology used in PAMS and presents the results of the proposed phase out of incandescent bulbs in Chile.
Intrinsic Constraints on Language: Grammar and Hermeneutics
Bickhard, Mark H.
Intrinsic Constraints on Language: Grammar and Hermeneutics Mark H. Bickhard Mark H. Bickhard on Language: Grammar and Hermeneutics Mark H. Bickhard Abstract Functional and pragmatic approaches to grammar to its nature. I also show how phenomena of implicature, the hermeneutic circle, and forms of creative
Optimal Power Flow Incorporating Voltage Collapse Constraints
CaÃ±izares, Claudio A.
Optimal Power Flow Incorporating Voltage Collapse Constraints William Rosehart Claudio Ca on the current operating con- ditions is presented. Second, an Optimal Power Flow formulation that incorporates: Voltage Collapse, Optimal Power Flow, Bifur- cations. I. Introduction As open-access market principles
Constraint satisfaction and global optimization in robotics
Neumaier, Arnold
Constraint satisfaction and global optimization in robotics Arnold Neumaier UniversitÂ¨at Wien and Jean-Pierre Merlet INRIA Sophia Antipolis 1 #12;The design, validation, and use of robots poses a num they are going to do. Soon they will be able to do anything they want!" Genesis 11:6. 3 #12;A robot is a machine
Prioritisation of test suites containing precedence constraints
Miller, Tim
1 Prioritisation of test suites containing precedence constraints Tim Miller Department@unimelb.edu.au Abstract--Test case prioritisation is the process of ordering the exe- cution of test cases to achieve a certain goal, such as increasing the rate of fault detection. Many existing test case prioritisation
Constraints Techniques for Authoring Multimedia Documents
Joseph Fourier Grenoble-I, Université
Constraints Techniques for Authoring Multimedia Documents Muriel Jourdan, Cécile Roisin and Laurent://opera.inrialpes.fr/OPERA/ 1 Introduction A multimedia document is defined as a set of objects from different media (text been done for the definition of languages and formats of multimedia documents, largely focusing
Electroweak constraints on flavorful effective theories
Efrati, Aielet; Soreq, Yotam
2015-01-01T23:59:59.000Z
We derive model-independent constraints arising from the Z and W boson observables on dimension six operators in the effective theory beyond the Standard Model. In particular, we discuss the generic flavor structure for these operators as well as several flavor patterns motivated by simple new physics scenarios.
Automated ConstraintBased Nucleotide Sequence Selection
Gifford, David K.
Automated ConstraintÂBased Nucleotide Sequence Selection for DNA Computation Alexander J. Hartemink computational melting temperÂ ature primitive to search a ``nucleotide space'' for sequences satisfying a pre that offer the promise of an efficient method for selecting optimal nucleotide sequences in an automated
Automated Constraint-Based Nucleotide Sequence Selection
Gifford, David K.
Automated Constraint-Based Nucleotide Sequence Selection for DNA Computation Alexander J. Hartemink computational melting temperature primitive to search a "nucleotide space" for sequences satisfying a pre that offer the promise of an efficient method for selecting optimal nucleotide sequences in an automated
Thunderstriking Constraints with JUPITER Christos Kloukinas
Weyde, Tillman
, response jitter, memory, energy consumption, QoS, depend- ability, etc. Unfortunately, we are still lackingThunderstriking Constraints with JUPITER Christos Kloukinas City University Department of Computing Northampton Sq., London EC1V 0HB, U.K. C.Kloukinas(at)soi.city.ac.uk Abstract We present JUPITER, a tool
Symmetry-Breaking Constraints for Matrix Models
Flener, Pierre
-breaking constraints. Experimental re- sults confirm their value. 1 Introduction Symmetry in a CSP model is an important issue as the exploration of symmet- ric but essentially equivalent branches in a search tree may techniques have been developed to address the issue of eliminating symmetry in CSP models. An important class
Transforming and Refining Abstract Constraint Specifications
Walsh, Toby
Transforming and Refining Abstract Constraint Specifications Alan M. Frisch1 , Brahim Hnich2 , Ian choose model transformations to reduce greatly the amount of effort that is required to solve a problem by systematic search. It is a consid- erable challenge to automate such transformations. A problem may be viewed
Synthesised Constraint Models for Distributed Energy Management
Reif, Wolfgang
generation [1], demand-side manage- ment, or building control software. In a producer-based view, supplySynthesised Constraint Models for Distributed Energy Management Alexander Schiendorfer, Jan frequently encountered in energy management systems such as the coordination of power generators in a virtual
Unbiased constraints on the clumpiness of universe from standard candles
Li, Zhengxiang; Zhu, Zong-Hong
2015-01-01T23:59:59.000Z
We perform unbiased tests for the clumpiness of universe by confronting the Zel'dovich-Kantowski-Dyer-Roeder luminosity distance which describes the effect of local inhomogeneities on the propagation of light with the observational one estimated from measurements of standard candles, i.e., type Ia supernovae (SNe Ia) and gamma-ray bursts (GRBs). Methodologically, we first determine the light-curve fitting parameters which account for distance estimation in SNe Ia observations and luminosity/energy relations which are responsible for distance estimation of GRBs in the global fit to reconstruct the Hubble diagrams in the context of a clumpy universe. Subsequently, these Hubble diagrams allow us to achieve unbiased constraints on the matter density parameter $\\Omega_m$ as well as clumpiness parameter $\\eta$ which quantifies the fraction of homogeneously distributed matter within a given light cone. At 1$\\sigma$ confidence level, the constraints are $\\Omega_m=0.34\\pm0.02$ and $\\eta=1.00^{+0.00}_{-0.02}$ from the ...
Design constraints on Cherenkov telescopes with Davies-Cotton reflectors
Bretz, Thomas
2013-01-01T23:59:59.000Z
This paper discusses the construction of high-performance ground-based gamma-ray Cherenkov telescopes with a Davies-Cotton reflector. For the design of such telescopes, usually physics constrains the field-of-view, while the photo-sensor size is defined by limited options. Including the effect of light-concentrators in front of the photo sensor, it is demonstrated that these constraints are enough to mutually constrain all other design parameters. The dependability of the various design parameters naturally arises once a relationship between the value of the point-spread functions at the edge of the field-of-view and the pixel field-of-view is introduced. To be able to include this constraint into a system of equations, an analytical description for the point-spread function of a tessellated Davies-Cotton reflector is derived from Taylor developments and ray-tracing simulations. Including higher order terms renders the result precise on the percent level. Design curves are provided within the typical phase sp...
The Potato Radius: a Lower Minimum Size for Dwarf Planets
Lineweaver, Charles H
2010-01-01T23:59:59.000Z
Gravitational and electronic forces produce a correlation between the mass and shape of objects in the universe. For example, at an average radius of ~ 200 km - 300 km, the icy moons and rocky asteroids of our Solar System transition from a rounded potato shape to a sphere. We derive this potato-to-sphere transition radius -- or "potato radius" -- from first principles. Using the empirical potato radii of asteroids and icy moons, we derive a constraint on the yield strength of these bodies during their formative years when their shapes were determined. Our proposed ~ 200 km potato radius for icy moons would substantially increase the number of trans-Neptunian objects classified as dwarf planets.
Parallel Web Scripting with Reactive Constraints Thibaud Hottelier
Bodik, Rastisla
Parallel Web Scripting with Reactive Constraints Thibaud Hottelier James Ide Doug Kimelman Ras Bodik Electrical Engineering and Computer Sciences University of California at Berkeley Technical Report to lists, requires prior specific permission. #12;Parallel Web Scripting with Reactive Constraints Thibaud
Validated Constraint Compilation Timothy J. Hickey David K. Wittenberg
Hickey, Timothy J.
Validated Constraint Compilation Timothy J. Hickey David K. Wittenberg Technical Report CSÂ99 on minimizing it [Wil63, Act96, Tay97]. By using interval constraints, we don't eliminate roundoff error, but we
Mechanical constraints enhance electrical energy densities of soft dielectrics
Ferrari, Silvia
Mechanical constraints enhance electrical energy densities of soft dielectrics Lin Zhang, Qiming, the dielectric will breakdown electrically. The breakdown limits the electrical energy density of the dielectric electric fields and thus increase their electrical energy densities. The mechanical constraints suppress
Sets of Symmetry Breaking Constraints Barbara M. Smith
Smith, Barbara M.
Sets of Symmetry Breaking Constraints Barbara M. Smith Cork Constraint Computation Centre, University College Cork, Ireland b.m.smith@4c.ucc.ie Abstract [Puget, 2004] has shown that if the symmetry
Flow shop scheduling with peak power consumption constraints
K. Fang
2012-03-29T23:59:59.000Z
Mar 29, 2012 ... Flow shop scheduling with peak power consumption constraints ... Keywords: scheduling, flow shop, energy, peak power consumption, integer ...
Threshold Boolean form for joint probabilistic constraints with ...
2015-01-02T23:59:59.000Z
Jan 2, 2015 ... probabilistic constraints with random technology matrix”. James Luedtke ?. Department of Industrial and Systems Engineering. University of ...
Ratigan, J.L.; Nieland, J.D.; Devries, K.L.
1998-12-31T23:59:59.000Z
Geomechanical analyses were made to determine the minimum gas pressure allowable based on an existing stress-based criterion (Damage Potential) and an advanced constitutive model (MDCF model) capable of quantifying the level of damage and healing in rock salt. The MDCF model is a constitutive model developed for the WIPP to provide a continuum description of the dislocation and damage deformation of salt. The purpose of this study was to determine if the MDCF model is applicable for evaluating the minimum gas pressure of CNG storage caverns. Specifically, it was to be determined if this model would predict that the minimum gas pressure in the caverns could be lowered without compromising the stability of the cavern. Additionally, the healing behavior of the salt was analyzed to determine if complete healing of the damaged rock zone would occur during the period the cavern was at maximum gas pressure. Significant findings of this study are reported.
Elementary Model of Constraint Quantization with an Anomaly
J. Scott Little; John R. Klauder
2005-02-10T23:59:59.000Z
Quantum gravity is made more difficult in part by its constraint structure. The constraints are classically first-class; however, upon quantization they become partially second-class. To study such behavior, we focus on a simple problem with finitely many degrees of freedom and demonstrate how the projection operator formalism for dealing with quantum constraints is well suited to this type of example.
4 Editor: Marius C. Silaghi Crossroads in Constraint Programming
Boyer, Edmond
of the constraint satisfaction problem (CSP). The constraints of a CSP are specified as relations on a set of vari- ables. The choice of these variables and formulation of the constraints turns out to be essential that may change in the near future. Fig. 1. Freuderfest location If one views the variables of a CSP
Handling Soft Constraints in the Semantic Web Architecture
Preece, Alun
for a service-providing agent to reason about its commitments as soft constraints. The two essential of CIF/SWRL. The soft CSP on- tology is intended to be used with CIF/SWRL, but is also potentially usable to the particular constraint satisfaction problem (CSP) in which the constraint is being applied. In relation
The Solar Heavy Element Abundances: I. Constraints from Stellar Interiors
Delahaye, F; Delahaye, Franck; Pinsonneault, Marc
2005-01-01T23:59:59.000Z
The latest solar atmosphere models include non-LTE corrections and 3D hydrodynamic convection simulations. These models predict a significant reduction in the solar metal abundance, which leads to a serious conflict between helioseismic data and the predictions of solar interiors models. We demonstrate that the helioseismic constraints on the surface convection zone depth and helium abundance combined with stellar interiors models can be used to define the goodness of fit for a given chemical composition. After a detailed examination of the errors in the theoretical models we conclude that models constructed with the older solar abundances are consistent (seismic data. Models constructed with the proposed new low abundance scale are strongly disfavored, disagreeing at the 15 \\sigma level. We then use the sensitivity of the seismic properties to abundance changes to invert the problem and infer a seismic solar heavy element abundance mix with two components: meteoritic abundances, and th...
Rode, Sebastian; Schreiber, Martin; Kühnle, Angelika; Rahe, Philipp, E-mail: rahe@uni-mainz.de [Institut für Physikalische Chemie, Fachbereich Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55099 Mainz (Germany)] [Institut für Physikalische Chemie, Fachbereich Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55099 Mainz (Germany)
2014-04-15T23:59:59.000Z
In frequency modulated non-contact atomic force microscopy, the change of the cantilever frequency (?f) is used as the input signal for the topography feedback loop. Around the ?f(z) minimum, however, stable feedback operation is challenging using a standard proportional-integral-derivative (PID) feedback design due to the change of sign in the slope. When operated under liquid conditions, it is furthermore difficult to address the attractive interaction regime due to its often moderate peakedness. Additionally, the ?f signal level changes severely with time in this environment due to drift of the cantilever frequency f{sub 0} and, thus, requires constant adjustment. Here, we present an approach overcoming these obstacles by using the derivative of ?f with respect to z as the input signal for the topography feedback loop. Rather than regulating the absolute value to a preset setpoint, the slope of the ?f with respect to z is regulated to zero. This new measurement mode not only makes the minimum of the ?f(z) curve directly accessible, but it also benefits from greatly increased operation stability due to its immunity against f{sub 0} drift. We present isosurfaces of the ?f minimum acquired on the calcite CaCO{sub 3}(101{sup ¯}4) surface in liquid environment, demonstrating the capability of our method to image in the attractive tip-sample interaction regime.
Fromherz, Markus P.J.
, and their many possible configurations. Low cost can be achieved through the mass fabrication of the simpler* Presented at CP'99 Workshop on Constraints in Control (CC'99). Towards Constraint-based Actuation
Solar System constraints to nonminimally coupled gravity
Orfeu Bertolami; Riccardo March; Jorge Páramos
2013-06-05T23:59:59.000Z
We extend the analysis of Chiba, Smith and Erickcek \\cite{CSE} of Solar System constraints on $f(R)$ gravity to a class of nonminimally coupled (NMC) theories of gravity. These generalize $f(R)$ theories by replacing the action functional of General Relativity (GR) with a more general form involving two functions $f^1(R)$ and $f^2(R)$ of the Ricci scalar curvature $R$. While the function $f^1(R)$ is a nonlinear term in the action, analogous to $f(R)$ gravity, the function $f^2(R)$ yields a NMC between the matter Lagrangian density $\\LL_m$ and the scalar curvature. The developed method allows for obtaining constraints on the admissible classes of functions $f^1(R)$ and $f^2(R)$, by requiring that predictions of NMC gravity are compatible with Solar System tests of gravity. We apply this method to a NMC model which accounts for the observed accelerated expansion of the Universe.
Solar system constraints on Rindler acceleration
Sante Carloni; Daniel Grumiller; Florian Preis
2011-05-09T23:59:59.000Z
We discuss the classical tests of general relativity in the presence of Rindler acceleration. Among these tests the perihelion shifts give the tightest constraints and indicate that the Pioneer anomaly cannot be caused by a universal solar system Rindler acceleration. We address potential caveats for massive test-objects. Our tightest bound on Rindler acceleration that comes with no caveats is derived from radar echo delay and yields |a|<3nm/s^2.
Urban Parks: Constraints on Park Visitation
Scott, David
2006-12-19T23:59:59.000Z
in a Recreation research shows that there are marked inequalities among population groups in terms of their participation in different leisure activities and their use of local, regional and national park and recre- ation services. Those who do... studies focused primarily on factors that are physical and external to the individual, such as disabilities or lack of facilities. But there are also intrapersonal constraints, which have to do with people?s personality needs, prior socialization...
Dynamical Constraints on Disk Galaxy Formation
Stacy McGaugh
1999-09-27T23:59:59.000Z
The rotation curves of disk galaxies exhibit a number of striking regularities. The amplitude of the rotation is correlated with luminosity (Tully-Fisher), the shape of the rotation curve is well predicted by the luminous mass distribution, and the magnitude of the mass discrepancy increases systematically with decreasing centripetal acceleration. These properties indicate a tight connection between light and mass, and impose strong constraints on theories of galaxy formation.
Razvan Teodorescu
2014-12-24T23:59:59.000Z
A topological constraint on the possible values of the universal quantization parameter is revealed in the case of geometric quantization on (boundary) curves diffeomorphic to $S^1$, analytically extended on a bounded domain in $\\mathbb{C}$, with $n \\ge 2$ boundary components. Unlike the case of one boundary component (such as the canonical Berezin quantization of the Poincar\\'e upper-half plane or the case of conformally-invariant 2D systems), the more general case considered here leads to a strictly positive minimum value for the quantization parameter, which depends on the geometrical data of the domain (specifically, the total area and total perimeter in the smooth case). It is proven that if the lower bound is attained, then $n=2$ and the domain must be annular, with a direct interpretation in terms of the global monodromy.
Minimum error discrimination between similarity-transformed quantum states
Jafarizadeh, M. A. [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, Tehran 19395-1795 (Iran, Islamic Republic of); Research Institute for Fundamental Sciences, Tabriz 51664 (Iran, Islamic Republic of); Sufiani, R. [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, Tehran 19395-1795 (Iran, Islamic Republic of); Mazhari Khiavi, Y. [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of)
2011-07-15T23:59:59.000Z
Using the well-known necessary and sufficient conditions for minimum error discrimination (MED), we extract an equivalent form for the MED conditions. In fact, by replacing the inequalities corresponding to the MED conditions with an equivalent but more suitable and convenient identity, the problem of mixed state discrimination with optimal success probability is solved. Moreover, we show that the mentioned optimality conditions can be viewed as a Helstrom family of ensembles under some circumstances. Using the given identity, MED between N similarity transformed equiprobable quantum states is investigated. In the case that the unitary operators are generating a set of irreducible representation, the optimal set of measurements and corresponding maximum success probability of discrimination can be determined precisely. In particular, it is shown that for equiprobable pure states, the optimal measurement strategy is the square-root measurement (SRM), whereas for the mixed states, SRM is not optimal. In the case that the unitary operators are reducible, there is no closed-form formula in the general case, but the procedure can be applied in each case in accordance to that case. Finally, we give the maximum success probability of optimal discrimination for some important examples of mixed quantum states, such as generalized Bloch sphere m-qubit states, spin-j states, particular nonsymmetric qudit states, etc.
Carter, Michael Timothy
1993-01-01T23:59:59.000Z
Parameterization for Minimum-Time Control . . . . 28 28 29 35 39 V CONTROL PARAMETER APPROXIMATIONS. . Control Parameter Approximations for Near-Minimum Time Rest-to- Rest Maneuvers . . Rules of Thumb for Minimum-Time Rest-to-Rest Maneuvers Using the Bang-Bang... ControL One-Switch Bang-Bang Control Approximation . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . , , . . . . , . . Switch Time Approximations Bang-Bang Controls with an Even Number of Control Switches...
E-Print Network 3.0 - accommodating practical constraints Sample...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
in the average case. Constraint optimization... applications and can accommodate user preferences and uncertainties within the constraint formalism. Techniques... be...
Jian Jinbao, E-mail: jianjb@gxu.edu.cn; Li Jianling; Mo Xingde [College of Mathematics and Information Science, Guangxi University, Nanning, Guangxi 530004 (China)
2006-06-15T23:59:59.000Z
This paper discusses a kind of optimization problem with linear complementarity constraints, and presents a sequential quadratic programming (SQP) algorithm for solving a stationary point of the problem. The algorithm is a modification of the SQP algorithm proposed by Fukushima et al. [Computational Optimization and Applications, 10 (1998),5-34], and is based on a reformulation of complementarity condition as a system of linear equations. At each iteration, one quadratic programming and one system of equations needs to be solved, and a curve search is used to yield the step size. Under some appropriate assumptions, including the lower-level strict complementarity, but without the upper-level strict complementarity for the inequality constraints, the algorithm is proved to possess strong convergence and superlinear convergence. Some preliminary numerical results are reported.
CMB Constraints On The Thermal WIMP Mass And Annihilation Cross Section
Gary Steigman
2015-03-05T23:59:59.000Z
A thermal relic, often referred to as a weakly interacting massive particle (WIMP), is a particle produced during the early evolution of the Universe whose present (relic) abundance depends only on its mass and its thermally averaged annihilation cross section (annihilation rate factor) sigma*v_ann. Late time WIMP annihilation has the potential to affect the cosmic microwave background (CMB) power spectrum. Current observational constraints on the absence of such effects provide bounds on the mass and the annihilation cross section of relic particles that may, but need not be dark matter candidates. For a WIMP that is a dark matter candidate, the CMB constraint sets an upper bound to the annihilation cross section, leading to a lower bound to its mass that depends on whether or not the WIMP is its own antiparticle. For a self-conjugate WIMP, m_min = 50f GeV, where f is an electromagnetic energy efficiency factor. For a non self-conjugate WIMP, the minimum mass is a factor of two larger. For a WIMP that is a subdominant component of the dark matter density there is no bound on its mass and the upper bound to its annihilation cross section imposed by the CMB transforms into a lower bound to its annihilation cross section. These results are outlined and quantified here using the latest CMB constraints for a stable, symmetric (equal number of particles and antiparticles), WIMP whose annihilation is s-wave dominated, and for particles that are, or are not, their own antiparticle.
Supernova constraints on multi-coupled dark energy
Piloyan, Arpine [Yerevan State University, Alex Manoogian 1, Yerevan 0025 (Armenia); Marra, Valerio; Amendola, Luca [Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg (Germany); Baldi, Marco, E-mail: arpine.piloyan@ysu.am, E-mail: valerio.marra@me.com, E-mail: marco.baldi5@unibo.it, E-mail: l.amendola@thphys.uni-heidelberg.de [Dipartimento di Fisica e Astronomia, Università di Bologna, Viale C. Berti-Pichat 6/2, I-40127, Bologna (Italy)
2013-07-01T23:59:59.000Z
The persisting consistency of ever more accurate observational data with the predictions of the standard ?CDM cosmological model puts severe constraints on possible alternative scenarios, but still does not shed any light on the fundamental nature of the cosmic dark sector. As large deviations from a ?CDM cosmology are ruled out by data, the path to detect possible features of alternative models goes necessarily through the definition of cosmological scenarios that leave almost unaffected the background and — to a lesser extent — the linear perturbations evolution of the universe. In this context, the Multi-coupled DE (McDE) model was proposed by Baldi [9] as a particular realization of an interacting Dark Energy field characterized by an effective screening mechanism capable of suppressing the effects of the coupling at the background and linear perturbation level. In the present paper, for the first time, we challenge the McDE scenario through a direct comparison with real data, in particular with the luminosity distance of Type Ia supernovae. By studying the existence and stability conditions of the critical points of the associated background dynamical system, we select only the cosmologically consistent solutions, and confront their background expansion history with data. Confirming previous qualitative results, the McDE scenario appears to be fully consistent with the adopted sample of Type Ia supernovae, even for coupling values corresponding to an associated scalar fifth-force about four orders of magnitude stronger than standard gravity. Our analysis demonstrates the effectiveness of the McDE background screening, and shows some new non-trivial asymptotic solutions for the future evolution of the universe. Clearly, linear perturbation data and, even more, nonlinear structure formation properties are expected to put much tighter constraints on the allowed coupling range. Nonetheless, our results show how the background expansion history might be highly insensitive to the fundamental nature and to the internal complexity of the dark sector.
The Solar Heavy Element Abundances: I. Constraints from Stellar Interiors
Franck Delahaye; Marc Pinsonneault
2005-11-29T23:59:59.000Z
The latest solar atmosphere models include non-LTE corrections and 3D hydrodynamic convection simulations. These models predict a significant reduction in the solar metal abundance, which leads to a serious conflict between helioseismic data and the predictions of solar interiors models. We demonstrate that the helioseismic constraints on the surface convection zone depth and helium abundance combined with stellar interiors models can be used to define the goodness of fit for a given chemical composition. After a detailed examination of the errors in the theoretical models we conclude that models constructed with the older solar abundances are consistent (seismic data. Models constructed with the proposed new low abundance scale are strongly disfavored, disagreeing at the 15 \\sigma level. We then use the sensitivity of the seismic properties to abundance changes to invert the problem and infer a seismic solar heavy element abundance mix with two components: meteoritic abundances, and the light metals CNONe. Seismic degeneracies between the best solutions for the elements arise for changes in the relative CNONe abundances and their effects are quantified. We obtain Fe/H=7.50+/-0.045+/-0.003(CNNe) and O/H=8.86+/-0.041+/-0.025(CNNe) for the relative CNNe in the GS98 mixture. The inferred solar oxygen abundance disagree with the abundance inferred from the 3D hydro models. Changes in the Ne abundance can mimic changes in O for the purposes of scalar constraints.Models constructed with low oxygen and high neon are inconsistent with the solar sound speed profile. The implications for the solar abundance scale are discussed.
Guo, Zaoyang
40 credits at level 2 Modern poetry 40 credits at level 1 The rise of the novel 40 credits at level 1 of literature at university level, with particular emphasis on the historical and cultural contexts that inform various literary styles. To complete the certificate (120 credits at level 1) you must gain a minimum
Lost sunspot cycle in the beginning of Dalton minimum: New evidence and consequences
Usoskin, Ilya G.
in the beginning of the Dalton minimum during 1790s [Usoskin et al., 2001]. Earlier, this cycle has been combinedLost sunspot cycle in the beginning of Dalton minimum: New evidence and consequences I. G. Usoskin November 2002; published 24 December 2002. [1] We have recently suggested that one solar cycle was lost
Towards a deployable satellite gripper based on multisegment dielectric elastomer minimum energy
Floreano, Dario
Towards a deployable satellite gripper based on multisegment dielectric elastomer minimum energy dielectric elastomer minimum energy structures O. A. Araromi*a , I. Gavrilovichb , J. Shintakea , S. Rosseta , H. R. Sheaa a Microsystems For Space Technologies Laboratory, Ã?cole Polytechnique FÃ©dÃ©rale de
An Exponential Improvement on the MST Heuristic for Minimum Energy Broadcasting
Caragiannis, Ioannis
in energy saving. A naturally arising issue in ad hoc wireless networks is that of supporting communicationAn Exponential Improvement on the MST Heuristic for Minimum Energy Broadcasting in Ad Hoc Wireless Abstract. In this paper we present a new approximation algorithm for the Minimum Energy Broadcast Routing
On the Cost and Quality Tradeoff in Constructing Minimum-Energy Broadcast Trees in Wireless Ad
Hu, Y. Charlie
On the Cost and Quality Tradeoff in Constructing Minimum-Energy Broadcast Trees in Wireless Ad Hoc], each having a different complexity and produc- ing a broadcast tree with a different energy cost. Thus to the quality of the trees constructed. II. BUILDING BLOCKS The three ingredients that constitute any minimum-energy
Minimum Energy Consumption in Multicomponent Distillation. 1. Vmin Diagram for a Two-Product Column
Skogestad, Sigurd
Minimum Energy Consumption in Multicomponent Distillation. 1. Vmin Diagram for a Two-Product Column how the minimum energy consumption is related to the feed-component distribution for all possible operating points in a two-product distillation column with a multicomponent feed. The classical Underwood
Guidelines for Minimum Information for Publication of Quantitative Digital PCR Experiments
Magee, Joseph W.
this process we present the Minimum Information for Publication of Quantitative Digital PCR ExperimentsGuidelines for Minimum Information for Publication of Quantitative Digital PCR Experiments Jim F Vandesompele,6 Carl T. Wittwer,12 and Stephen A. Bustin13 There is growing interest in digital PCR (dPCR) be
The Minimum Distance of Turbo-Like Codes Louay Bazzi, Mohammad Mahdian, Daniel A. Spielman
Spielman, Daniel A.
1 The Minimum Distance of Turbo-Like Codes Louay Bazzi, Mohammad Mahdian, Daniel A. Spielman Abstract--Worst-case upper bounds are derived on the minimum distance of parallel concatenated Turbo codes that parallel-concatenated Turbo codes and repeat-convolute codes with sub-linear memory are asymptotically bad
Bloat control and generalization pressure using the minimum description length principle for a
Bacardit, Jaume
Bloat control and generalization pressure using the minimum description length principle to achieve these objectives based on the Minimum Description Length (MDL) principle. This principle solutions that are bigger than necessary, contradicting the Occam's razor principle [7] which says that "the
Bloat control and generalization pressure using the minimum description length principle for a
Bacardit, Jaume
Bloat control and generalization pressure using the minimum description length principle propose a method to achieve these objectives based on the Minimum Description Length (MDL) principle. This principle is a metric which combines in a smart way the accuracy and the complexity of a theory (rule set
Constructing Minimum-Energy Broadcast Trees In Wireless Ad Hoc Networks
Liang, Weifa
algorithm, power awareness, ad hoc networks, energy consumption optimization, broad- cast and multicastConstructing Minimum-Energy Broadcast Trees In Wireless Ad Hoc Networks Weifa Liang Department related to power consump- tion in this kind of network. One is the minimum-energy broadcast tree problem
Multichannel Blind Deconvolution of Non-minimum Phase Systems Using Information
Vialatte, François
1 Multichannel Blind Deconvolution of Non-minimum Phase Systems Using Information Backpropagation L;210 Multichannel Blind Deconvolution of Non-minimum Phase Systems Using Information Backpropagation L.-Q. Zhang, A- composition approach, for multichannel blind de- convolution of non-minimumphase systems. In 20] we has
On the random 2-stage minimum spanning tree Abraham D. Flaxman
Krivelevich, Michael
On the random 2-stage minimum spanning tree Abraham D. Flaxman Department of Mathematical Sciences random variables, uniformly distributed between 0 and 1, then the expected cost of the minimum spanning tree is asymptotically equal to #16;(3) = P 1 i=1 i 3 . Here we consider the following stochastic two
FINDING THE GLOBAL MINIMUM FOR BINARY IMAGE RESTORATION Tony F. Chan
Esedoglu, Selim
- est. In this paper we define the restored image as the global min- imizer of the total-variation (TVFINDING THE GLOBAL MINIMUM FOR BINARY IMAGE RESTORATION Tony F. Chan , Selim EsedoÂ¯glu and Mila and there are no general methods to calculate the global minimum, while local minimziers are very often of limited inter
Modeling the Global Structure of the Heliosphere during the Recent Solar Minimum
California at Berkeley, University of
, Berkeley, California. Abstract. The recent solar minimum, marking the end of solar cycle 23, has beenModeling the Global Structure of the Heliosphere during the Recent Solar Minimum: Model Mikic and Janet G. Luhmann Predictive Science, San Diego, California. Harvard-Smithsonian Center
Graphical Visualisation of Minimum Energy Requirements for Multi-Effect Distillation Arrangements
Skogestad, Sigurd
1 Graphical Visualisation of Minimum Energy Requirements for Multi-Effect Distillation Arrangements of this paper is to present a simple graphical method for obtaining the energy usage and to compare the energy of Chemical Engineering, 7491 Trondheim, Norway Abstract The minimum energy requirements of six different heat
Mackworth, Alan K.
-binary classic con- straint satisfaction problems (CSPs). Based on the Semiring CSP and Valued CSP frameworks CSP, probabilistic CSP, max CSP, and weighted CSP. This extension is based on an idempotent satisfaction problem (CSP), local consistency can be characterized as deriving new constraints based on local
Astrophysical constraints on millicharged atomic dark matter
Audrey K. Kvam; David C. Latimer
2014-12-01T23:59:59.000Z
Some models of inelastic dark matter posit the existence of bound states under some new $U(1)'$ gauge symmetry. If this new dark photon kinetically mixes with the standard model photon, then the constituent particles in these bound states can acquire a fractional electric charge. This electric charge renders a dark-matter medium dispersive. We compute this frequency-dependent index of refraction for such a medium and use the frequency-dependent arrival time of light from astrophysical sources to constrain the properties of dark atoms in the medium. Using optical-wavelength observations from the Crab Pulsar, we find the electric millicharge of dark (electrons) protons to be smaller than the electric charge $e$ for dark atom masses below 100 keV, assuming a dark fine structure constant $\\boldsymbol{\\alpha}=1$. We estimate that future broadband observations of gamma-ray bursts can produce constraints on the millicharge of dark atoms with masses in the keV range that are competitive with existing collider constraints.
Statistical Methods for Estimating the Minimum Thickness Along a Pipeline
along the pipeline can be used to estimate corrosion levels. The traditional parametric model method for this problem is to estimate parameters of a specified corrosion distribution and then to use these parameters companies use pipelines to transfer oil, gas and other materials from one place to another. Manufactures
Determine Minimum Silver Flake Addition to GCM for Iodine Loaded AgZ
Terry J. Garino; Tina M. Nenoff; Mark A. Rodriguez
2014-04-01T23:59:59.000Z
The minimum amount of silver flake required to prevent loss of I{sub 2} during sintering in air for a SNL Glass Composite Material (GCM) Waste Form containing AgI-MOR (ORNL, 8.7 wt%) was determined to be 1.1 wt% Ag. The final GCM composition prior to sintering was 20 wt% AgI-MOR, 1.1 wt% Ag, and 80 wt% Bi-Si oxide glass. The amount of silver flake needed to suppress iodine loss was determined using thermo gravimetric analysis with mass spectroscopic off-gas analysis. These studies found that the ratio of silver to AgI-MOR required is lower in the presence of the glass than without it. Therefore an additional benefit of the GCM is that it serves to inhibit some iodine loss during processing. Alternatively, heating the AgI-MOR in inert atmosphere instead of air allowed for densified GCM formation without I{sub 2} loss, and no necessity for the addition of Ag. The cause of this behavior is found to be related to the oxidation of the metallic Ag to Ag{sup +} when heated to above ~300{degrees}C in air. Heating rate, iodine loading levels and atmosphere are the important variables that determine AgI migration and results suggest that AgI may be completely incorporated into the mordenite structure by the 550{degrees}C sintering temperature.
Optimization Online - Control problems with mixed constraints and ...
J. Fr d ric Bonnans
2009-06-04T23:59:59.000Z
Jun 4, 2009 ... ... mixed constraints and application to an optimal investment problem ... of a control entering linearly in the state equation and cost function, we ...
Constraints On The Mechanism Of Long-Term, Steady Subsidence...
constraints are unavailable, or if only vertical deformation is known. The deformation source must be capable of causing broad vertical deformation with comparatively smaller...
animal productivity constraints: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
invariance with an elementary Higgs doublet implies that they also contribute to Higgs boson production at the LHC and we study the corresponding constraints that can be placed...
The Constant Rank Condition and Second Order Constraint ...
2009-11-13T23:59:59.000Z
Nov 13, 2009 ... The Constant Rank condition for feasible points of nonlinear ... stant Rank condition is, in addition, a second order constraint qualification.
Boolean Satisfiability with Transitivity Constraints Randal E. Bryant
Bryant, Randal E.
Boolean Satisfiability with Transitivity Constraints Randal E. Bryant ¡ and Miroslav N. Velev ¢ £ Computer Science, Carnegie Mellon University, Pittsburgh, PA Randy.Bryant@cs.cmu.edu¤ Electrical
Geologic and thermochronologic constraints on the initial orientation...
footwall shear zone Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Geologic and thermochronologic constraints on the initial...
A note on unbounded on/off constraints
H. Hijazi, L. Liberti
2014-11-12T23:59:59.000Z
involving decision variables which represent step counters in an abstract computer ... behind this work was inspired by indicator constraints appearing in large ...
Handling Nonnegative Constraints in Spectral Estimation Abstract 1 ...
Abstract. We consider convex optimization problems with the. constraint that the variables form a ... component of this work in other works, must be obtained from.
Threshold Boolean Form for Joint Probabilistic Constraints with ...
2013-09-12T23:59:59.000Z
probabilistic constraint with random technology matrix that ensures that the r inequalities TT i x ? di ...... Families of Problem Instances (|?|, p,r,|J|,U). Average
Tractable counterparts of distributionally robust constraints on risk ...
Krzysztof Postek
2014-05-22T23:59:59.000Z
May 22, 2014 ... Abstract: In this paper we study distributionally robust constraints on risk measures (such as standard deviation less the mean, Conditional ...
Constraints on topological order in Mott Insulators
Michael P. Zaletel; Ashvin Vishwanath
2015-04-18T23:59:59.000Z
We point out certain symmetry induced constraints on topological order in Mott Insulators (quantum magnets with an odd number of spin $\\tfrac{1}{2}$ per unit cell). We show, for example, that the double semion topological order is incompatible with time reversal and translation symmetry in Mott insulators. This sharpens the Hastings-Oshikawa-Lieb-Schultz-Mattis theorem for 2D quantum magnets, which guarantees that a fully symmetric gapped Mott insulator must be topologically ordered, but is silent on which topological order is permitted. An application of our result is the Kagome lattice quantum antiferromagnet where recent numerical calculations of entanglement entropy indicate a ground state compatible with either toric code or double semion topological order. Our result rules out the latter possibility.
Observational constraints on braneworld chaotic inflation
Andrew R Liddle; Anthony J Smith
2003-08-13T23:59:59.000Z
We examine observational constraints on chaotic inflation models in the Randall-Sundrum Type II braneworld. If inflation takes place in the high-energy regime, the perturbations produced by the quadratic potential are further from scale-invariance than in the standard cosmology, in the quartic case more or less unchanged, while for potentials of greater exponent the trend is reversed. We test these predictions against a data compilation including the WMAP measurements of microwave anisotropies and the 2dF galaxy power spectrum. While in the standard cosmology the quartic potential is at the border of what the data allow and all higher powers excluded, we find that in the high-energy regime of braneworld inflation even the quadratic case is under strong observational pressure. We also investigate the intermediate regime where the brane tension is comparable to the inflationary energy scale, where the deviations from scale-invariance prove to be greater.
Overcoming efficiency constraints on blind quantum computation
Carlos A. Pérez-Delgado; Joseph F. Fitzsimons
2014-11-18T23:59:59.000Z
Blind quantum computation allows a user to delegate a computation to an untrusted server while keeping the computation hidden. A number of recent works have sought to establish bounds on the communication requirements necessary to implement blind computation, and a bound based on the no-programming theorem of Nielsen and Chuang has emerged as a natural limiting factor. Here we show that this constraints only hold in limited scenarios and show how to overcome it using a method based on iterated gate-teleportations. We present our results as a family of protocols, with varying degrees of computational-ability requirements on the client. Certain protocols in this family exponentially outperform previously known schemes in terms of total communication. The approach presented here can be adapted to other distributed computing protocols to reduce communication requirements.
A Landscape Analysis of Constraint Satisfaction Problems
Florent Krzakala; Jorge Kurchan
2007-06-18T23:59:59.000Z
We discuss an analysis of Constraint Satisfaction problems, such as Sphere Packing, K-SAT and Graph Coloring, in terms of an effective energy landscape. Several intriguing geometrical properties of the solution space become in this light familiar in terms of the well-studied ones of rugged (glassy) energy landscapes. A `benchmark' algorithm naturally suggested by this construction finds solutions in polynomial time up to a point beyond the `clustering' and in some cases even the `thermodynamic' transitions. This point has a simple geometric meaning and can be in principle determined with standard Statistical Mechanical methods, thus pushing the analytic bound up to which problems are guaranteed to be easy. We illustrate this for the graph three and four-coloring problem. For Packing problems the present discussion allows to better characterize the `J-point', proposed as a systematic definition of Random Close Packing, and to place it in the context of other theories of glasses.
MODELING OBSERVATIONAL CONSTRAINTS FOR DARK MATTER HALOS
Hartwick, F. D. A. [Department of Physics and Astronomy, University of Victoria, Victoria, BC V8W 3P6 (Canada)
2012-12-01T23:59:59.000Z
Observations show that the underlying rotation curves at intermediate radii in spiral and low-surface-brightness galaxies are nearly universal. Further, in these same galaxies, the product of the central density and the core radius ({rho}{sub 0} r{sub 0}) is constant. An empirically motivated model for dark matter halos that incorporates these observational constraints is presented and shown to be in accord with the observations. A model fit to the observations of the galaxy cluster A611 shows that {rho}{sub 0} r{sub 0} for the dark matter halo in this more massive structure is larger by a factor of {approx}20 over that assumed for the galaxies. The model maintains the successful Navarro-Frenk-White form in the outer regions, although the well-defined differences in the inner regions suggest that modifications to the standard cold dark matter picture are required.
Asymptotic Solutions of Hamilton-Jacobi Equations with State Constraints
Mitake, Hiroyoshi [Waseda University, Department of Pure and Applied Mathematics (Japan)], E-mail: take_take_hiro2@akane.waseda.jp
2008-12-15T23:59:59.000Z
We study Hamilton-Jacobi equations in a bounded domain with the state constraint boundary condition. We establish a general convergence result for viscosity solutions of the Cauchy problem for Hamilton-Jacobi equations with the state constraint boundary condition to asymptotic solutions as time goes to infinity.
A Meeting Scheduling System Based on Open Constraint Programming
Zhu, Kenny Q.
- ences can be programmed using the OCP reactors language. CLP is suitable to be used in meetingA Meeting Scheduling System Based on Open Constraint Programming Kenny Qili Zhu and Andrew E a meeting scheduling system based on open constraint programming (OCP) paradigm. OCP is an extension
A Toolkit for Constraint Management in Heterogeneous Information Systems \\Lambda
Chawathe, Sudarshan S.
to monitor and enforce distributed integrity constraints in loosely coupled heterogeneous information systems in such environments. Our framework is used to describe (1) interfaces provided by a database for the data items integrity constraints over data that is stored in a collecÂ tion of loosely coupled heterogeneous
Right frontier constraint for discourses in non-canonical order
Paris-Sud XI, UniversitÃ© de
Right frontier constraint for discourses in non-canonical order Laurence DANLOS Pierre HANKACH constituents are related to each other in a constrained way. The Right Frontier Constraint (henceforth RFC for the attachment of a new constituent are those on the "right frontier". Moreover, RFC is also used as an anaphora
Solving Necklace Constraint Problems Pierre Flener and Justin Pearson 1
Flener, Pierre
getting an essentially different solution. We bring together the fields of combinatorial enumeration in [16]. A constraint satisfaction problem (CSP) is a triplet X, D, C , where X is a sequence of n-structure of the CSP and we say that the CSP has rotation variable symmetry. If the constraint set C has a domain D
The complexity of recursive constraint satisfaction Victor W. Marek
Marek, Victor W.
to the problem must satisfy. As such, CSP has a very long history, essentially reaching to the beginning equivalent results about the complexity of the problem of finding a solution to a recursive CSP problem. 1 Introduction Constraint Programming and, more specifically, Constraint Satisfaction Problems (CSP
Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling
Johansson, Karl Henrik
Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling James Weimer, JosÂ´e AraÂ´ujo, Aitor Hernandez and Karl Henrik Johansson Abstract-- Constraint-based control over wireless sensor net- works (WSNs) require control strategies that achieve a desired closed-loop system performance while
Constraint-based Scheduling Markus P.J. Fromherz
Fromherz, Markus P.J.
such as product assembly se- quencing. This makes constraint-based scheduling interesting to the control community planning, scheduling, and control tasks. This tutorial gives a brief introduction to constraint and reconfigurable con- trol, and the integration of various planning, scheduling, and control tasks
accelerator energy constraints: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
energy constraints First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Constraints on the Acceleration of...
Thermal Unit Commitment Including Optimal AC Power Flow Constraints
iteration to another. The complexity of a given iteration becomes linear in the number of generators instead of the coupling between generator time- spanning constraints and system-wide instantaneous constraints, suers from combinatoric complexity as the number of generators increases. It is this feature that dooms
China's Coal: Demand, Constraints, and Externalities
Aden, Nathaniel
2010-01-01T23:59:59.000Z
12 2.6. International coal prices and18 International coal prices and trade In parallel with the2001, domestic Chinese coal prices moved from stable levels
Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
Mathew S. Madhavacheril; Neelima Sehgal; Tracy R. Slatyer
2014-11-28T23:59:59.000Z
Updated constraints on dark matter cross section and mass are presented combining CMB power spectrum measurements from Planck, WMAP9, ACT, and SPT as well as several low-redshift datasets (BAO, HST, supernovae). For the CMB datasets, we combine WMAP9 temperature and polarization data for l 2500, and Planck CMB four-point lensing measurements. We allow for redshift-dependent energy deposition from dark matter annihilation by using a `universal' energy absorption curve. We also include an updated treatment of the excitation, heating, and ionization energy fractions, and provide updated deposition efficiency factors (f_eff) for 41 different dark matter models. Assuming perfect energy deposition (f_eff = 1) and a thermal cross section, dark matter masses below 26 GeV are excluded at the 2-sigma level. Assuming a more generic efficiency of f_eff = 0.2, thermal dark matter masses below 5 GeV are disfavored at the 2-sigma level. These limits are a factor of ~2 improvement over those from WMAP9 data alone. These current constraints probe, but do not exclude, dark matter as an explanation for reported anomalous indirect detection observations from AMS-02/PAMELA and the Fermi Gamma-ray Inner Galaxy data. They also probe relevant models that would explain anomalous direct detection events from CDMS, CRESST, CoGeNT, and DAMA, as originating from a generic thermal WIMP. Projected constraints from the full Planck release should improve the current limits by another factor of ~2, but will not definitely probe these signals. The proposed CMB Stage IV experiment will more decisively explore the relevant regions and improve upon the Planck constraints by another factor of ~2.
Geological Constraints on High-Level Nuclear Waste Disposal and their Relationship to Possible
Polly, David
nuclear energy. The U.S. government has recognized geologic disposal as a solution since the mid-1950s of plants produces about 20% of the United States' total energy consumption [EPA website, Nuclear Energy radioactivity produced in the process of electricity generation by nuclear fission [World Nuclear Association
Processing constraints on high-level nuclear waste glasses for Hanford Waste Vitrification Plant
Hrma, P. [Pacific Northwest Lab., Richland, WA (United States)
1993-12-31T23:59:59.000Z
The work presented in this paper is a part of a major technology program supported by the US Department of Energy (DOE) in preparation for the planned operation of the Hanford Waste Vitrification Plant (HWVP). Because composition of Hanford waste varies greatly, processability is a major concern for successful vitrification. This paper briefly surveys general aspects of waste glass processability and then discusses their ramifications for specific examples of Hanford waste streams.
J 4.8 MODELING THE TALLAHASSEE MINIMUM TEMPERATURE ANOMALY Kelly G. Godsey*
Fuelberg, Henry
1 J 4.8 MODELING THE TALLAHASSEE MINIMUM TEMPERATURE ANOMALY Kelly G. Godsey* 1,2 , Henry E author address: Kelly G. Godsey, NWS, Morristown, TN 37814; email: Kelly.Godsey@noaa.gov #12;2 Fig. 1
Hallam, Steven
2011-04-26T23:59:59.000Z
Steven Hallam of the University of British Columbia talks "From Fjords to Open Seas: Ecological Genomics of Expanding Oxygen Minimum Zones" on March 24, 2010 at the 5th Annual DOE JGI User Meeting
A Cycle Augmentation Algorithm for Minimum Cost Multicommodity Flows on a Ring
Shepherd, Bruce
A Cycle Augmentation Algorithm for Minimum Cost Multicommodity Flows on a Ring Bruce Shepherd bshep of Ford and Fulkerson [5]. We mention that a similar state of affairs held for generalized
MINIMUM REJECTION SCHEDULING IN ALL-PHOTONIC NETWORKS Nahid Saberi and Mark J. Coates
MINIMUM REJECTION SCHEDULING IN ALL-PHOTONIC NETWORKS Nahid Saberi and Mark J. Coates Department of Electrical and Computer Engineering McGill University Montreal, QC, Canada E-mail: nahid.saberi
Energy-Efficient Distributed Constructions of Minimum Spanning Tree for Wireless Ad-hoc
Khan, Maleq
1 Energy-Efficient Distributed Constructions of Minimum Spanning Tree for Wireless Ad-hoc Networks of a class of simple and local algorithms called Nearest Neighbor Tree (NNT) algorithms for energy-efficient
IDAPA 37.03.03 - Rules and Minimum Standards for the Construction...
3.03 - Rules and Minimum Standards for the Construction and Use of Injection Wells Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document-...
Online Supplement to "Bounding Distributions for the Weight of a Minimum Spanning Tree in Stochastic
Shier, Douglas R.
Online Supplement to "Bounding Distributions for the Weight of a Minimum Spanning Tree in Stochastic Networks" Kevin R. Hutson Â· Douglas R. Shier Department of Mathematics & Computer Science, Denison
Statistical Analysis and Time Series Models for Minimum/Maximum Temperatures
Sidorov, Nikita
temperatures, thereby reducing the adverse effect of global warming in the Antarctic Peninsula. Keywords that the observed increase in the minimum temperatures is a consequence of human activity rather than natural causes
China's Coal: Demand, Constraints, and Externalities
Aden, Nathaniel; Fridley, David; Zheng, Nina
2009-07-01T23:59:59.000Z
This study analyzes China's coal industry by focusing on four related areas. First, data are reviewed to identify the major drivers of historical and future coal demand. Second, resource constraints and transport bottlenecks are analyzed to evaluate demand and growth scenarios. The third area assesses the physical requirements of substituting coal demand growth with other primary energy forms. Finally, the study examines the carbon- and environmental implications of China's past and future coal consumption. There are three sections that address these areas by identifying particular characteristics of China's coal industry, quantifying factors driving demand, and analyzing supply scenarios: (1) reviews the range of Chinese and international estimates of remaining coal reserves and resources as well as key characteristics of China's coal industry including historical production, resource requirements, and prices; (2) quantifies the largest drivers of coal usage to produce a bottom-up reference projection of 2025 coal demand; and (3) analyzes coal supply constraints, substitution options, and environmental externalities. Finally, the last section presents conclusions on the role of coal in China's ongoing energy and economic development. China has been, is, and will continue to be a coal-powered economy. In 2007 Chinese coal production contained more energy than total Middle Eastern oil production. The rapid growth of coal demand after 2001 created supply strains and bottlenecks that raise questions about sustainability. Urbanization, heavy industrial growth, and increasing per-capita income are the primary interrelated drivers of rising coal usage. In 2007, the power sector, iron and steel, and cement production accounted for 66% of coal consumption. Power generation is becoming more efficient, but even extensive roll-out of the highest efficiency units would save only 14% of projected 2025 coal demand for the power sector. A new wedge of future coal consumption is likely to come from the burgeoning coal-liquefaction and chemicals industries. If coal to chemicals capacity reaches 70 million tonnes and coal-to-liquids capacity reaches 60 million tonnes, coal feedstock requirements would add an additional 450 million tonnes by 2025. Even with more efficient growth among these drivers, China's annual coal demand is expected to reach 3.9 to 4.3 billion tonnes by 2025. Central government support for nuclear and renewable energy has not reversed China's growing dependence on coal for primary energy. Substitution is a matter of scale: offsetting one year of recent coal demand growth of 200 million tonnes would require 107 billion cubic meters of natural gas (compared to 2007 growth of 13 BCM), 48 GW of nuclear (compared to 2007 growth of 2 GW), or 86 GW of hydropower capacity (compared to 2007 growth of 16 GW). Ongoing dependence on coal reduces China's ability to mitigate carbon dioxide emissions growth. If coal demand remains on a high growth path, carbon dioxide emissions from coal combustion alone would exceed total US energy-related carbon emissions by 2010. Within China's coal-dominated energy system, domestic transportation has emerged as the largest bottleneck for coal industry growth and is likely to remain a constraint to further expansion. China has a low proportion of high-quality reserves, but is producing its best coal first. Declining quality will further strain production and transport capacity. Furthermore, transporting coal to users has overloaded the train system and dramatically increased truck use, raising transportation oil demand. Growing international imports have helped to offset domestic transport bottlenecks. In the long term, import demand is likely to exceed 200 million tonnes by 2025, significantly impacting regional markets.
Procedural Level Generation Using Occupancy-Regulated Extension Peter Mawhorter, Michael Mateas
California at Santa Cruz, University of
Procedural Level Generation Using Occupancy-Regulated Extension Peter Mawhorter, Michael Mateas Abstract-- Existing approaches to procedural level generation in 2D platformer games are, with some notable at arbitrary scales. I. INTRODUCTION A good procedural level generator must satisfy complex constraints
Double active shielded magnetic field gradient design with minimum inductance method
Wang, Xu
1992-01-01T23:59:59.000Z
DOUBLE ACTIVE SHIELDED MAGNETIC FIELD GRADIENT DESIGN WITH MINIMUM INDUCTANCE METHOD A Thesis by XU WANG Submitted to the Oflice of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1992 Major Subject: Physics DOUBLE ACTIVE SHIELDED MAGNETIC FIELD GRADIENT DESIGN WITH MINIMUM INDUCTANCE METHOD A Thesis by XU WANG Approved as to style and content by: F. R. Huson (Chair of Committee) Steve Wry (Member) Edward...
Multi-level Verticality Optimization: Concept, Strategies, and ...
2012-04-17T23:59:59.000Z
In traditional multi-level graph drawing—known as Sugi- yama's framework—the ..... matrix, or by introducing equality constraints on the respective variables. In our ... mode. The SDP algorithm runs on top of MatLab 7.7, whereas the heuristics.
Holliday, JoAnne
A Dynamic Localized Minimum-Energy Agent Tree-Based Data Dissemination Scheme for Wireless Sensor this prob- lem by proposing a minimum-energy tree-based data dissemination scheme, Dynamic Localized Minimum-Energy Agent Tree-Based Scheme (DLATS). We exploit the fact that sensor nodes are stationary and location
Chen, Yuanzhu Peter
in polynomial time, in sharp con- trast with the NP-hardness of constructing the minimum-energy multicast tree with a single tree is presented. The minimum energy-per-bit for multicasting with routing is found by an integer in the Steiner tree literature, can now be interpreted as the optimization for minimum energy multicasting
Islam, M. Saif
TECHNICAL REPORT TR-09-04, UC DAVIS, SEPTEMBER 2009. 1 Minimum-Energy Multicast Tree in Cognitive guarantee for constructing the minimum-energy multicast tree, which transforms the multicast problem load of the primary network on the minimum-energy multicast tree. I. INTRODUCTION Multicast can provide
Nair, Sankar
Strain energy minimum and vibrational properties of single-walled aluminosilicate nanotubes study the origin of the strain energy minimum in a single-walled aluminosilicate nanotube via a har- persity in the nanotube diameter is explained in terms of a minimum in the strain energy due
Lin, Zhiqun
Major in Aerospace Engineering Master of Engineering (with creative component) Â A minimum of 27 Engineering along with a minimum of 3 credits of Aer E 599 (creative component) must be taken. The POS Mechanics Master of Engineering (with creative component) Â A minimum of 24 credits of acceptable course
Constraints on oscillating dark energy models
Aleksandra Kurek; Orest Hrycyna; Marek Szydlowski
2007-11-23T23:59:59.000Z
The oscillating scenario of route to Lambda was recently proposed by us arXiv:0704.1651 as an alternative to a cosmological constant in a explanation of the current accelerating universe. In this scenario phantom scalar field conformally coupled to gravity drives the accelerating phase of the universe. In our model $\\Lambda$CDM appears as a global attractor in the phase space. In this paper we investigate observational constraints on this scenario from recent measurements of distant supernovae type Ia, CMB R shift, BAO and $H(z)$ observational data. The Bayesian methods of model selection are used in comparison the model with concordance $\\Lambda$CDM one as well as with model with dynamical dark energy parametrised by linear form. We conclude that $\\Lambda$CDM is favoured over FRW model with dynamical oscillating dark energy. Our analysis also demonstrate that FRW model with oscillating dark energy is favoured over FRW model with decaying dark energy parametrised in linear way.
Constraint damping in the Z4 formulation and harmonic gauge
Carsten Gundlach; Jose M. Martin-Garcia; Gioel Calabrese; Ian Hinder
2005-07-14T23:59:59.000Z
We show that by adding suitable lower-order terms to the Z4 formulation of the Einstein equations, all constraint violations except constant modes are damped. This makes the Z4 formulation a particularly simple example of a lambda-system as suggested by Brodbeck et al. We also show that the Einstein equations in harmonic coordinates can be obtained from the Z4 formulation by a change of variables that leaves the implied constraint evolution system unchanged. Therefore the same method can be used to damp all constraints in the Einstein equations in harmonic gauge.
A Dichotomy for 2-Constraint Forbidden CSP Patterns
Cooper, Martin C
2012-01-01T23:59:59.000Z
Although the CSP (constraint satisfaction problem) is NP-complete, even in the case when all constraints are binary, certain classes of instances are tractable. We study classes of instances defined by excluding subproblems. This approach has recently led to the discovery of novel tractable classes. The complete characterisation of all tractable classes defined by forbidding patterns (where a pattern is simply a compact representation of a set of subproblems) is a challenging problem. We demonstrate a dichotomy in the case of forbidden patterns consisting of either one or two constraints. This has allowed us to discover new tractable classes including, for example, a novel generalisation of 2SAT.
Compact star constraints on the high-density EoS
H. Grigorian; D. Blaschke; T. Klahn
2006-11-19T23:59:59.000Z
A new scheme for testing the nuclear matter (NM) equation of state (EoS) at high densities using constraints from compact star (CS) phenomenology is applied to neutron stars with a core of deconfined quark matter (QM). An acceptable EoS shall not to be in conflict with the mass measurement of 2.1 +/- 0.2 M_sun (1 sigma level) for PSR J0751+1807 and the mass-radius relation deduced from the thermal emission of RX J1856-3754. Further constraints for the state of matter in CS interiors come from temperature-age data for young, nearby objects. The CS cooling theory shall agree not only with these data, but also with the mass distribution inferred via population synthesis models as well as with LogN-LogS data. The scheme is applied to a set of hybrid EsoS with a phase transition to stiff, color superconducting QM which fulfills all above constraints and is constrained otherwise from NM saturation properties and flow data of heavy-ion collisions. We extrapolate our description to low temperatures and draw conclusions for the QCD phase diagram to be explored in heavy-ion collision experiments.
Tree-level metastability bounds in two-Higgs doublet models
A. Barroso; P. M. Ferreira; I. Ivanov; Rui Santos
2013-05-06T23:59:59.000Z
The two Higgs doublet model has a rich vacuum structure, including the possibility of existence of two Standard Model-like minima at tree-level. It is therefore possible that the universe's vacuum is metastable, and a deeper minimum exists. We present the analytical conditions one must demand of the potential's parameters to prevent that possibility, and analyse what the current LHC data tells us about the eventual existence of that second minimum.
Composing Constraint Solvers IPA Dissertation Series 2005-18
Zoeteweij, Peter
Composing Constraint Solvers #12;IPA Dissertation Series 2005-18 The work reported in this thesis the auspices of the research school IPA (Institute for Programming research and Algorithmics
Einstein-aether gravity: theory and observational constraints
Ted Jacobson
2007-11-24T23:59:59.000Z
Einstein-aether theory is general relativity coupled to a dynamical unit timelike vector field. A brief review of current theoretical understanding and observational constraints on the four coupling parameters of the theory is given.
Stochastic constraints for vision-aided inertial navigation
Diel, David D., 1979-
2005-01-01T23:59:59.000Z
This thesis describes a new method to improve inertial navigation using feature-based constraints from one or more video cameras. The proposed method lengthens the period of time during which a human or vehicle can navigate ...
Concurrent Constraint Programming and NonCommutative Logic
Ruet, Paul
Concurrent Constraint Programming and NonÂCommutative Logic Paul Ruet ? , FranÂ¸cois Fages LIENS as formula, computationÂasÂproofÂsearch paradigm. This paradigm, first introduced for the Horn clause
Mechanical constraints as common ground between people and computers
Patten, James McMichael, 1977-
2006-01-01T23:59:59.000Z
This thesis presents a new type of human-computer interface based on mechanical constraints that combines some of the tactile feedback and affordances of mechanical systems with the abstract computational power of modern ...
Optimization With Parity Constraints: From Binary Codes to Discrete Integration
Bejerano, Gill
Optimization With Parity Constraints: From Binary Codes to Discrete Integration Stefano Ermon guarantees on the quality of the solution found. Markov Chain Monte Carlo [17, 21, 32] and Importance
Genetic Programming with Guaranteed Constraints Colin G. Johnson
Kent, University of
Genetic Programming with Guaranteed Constraints Colin G. Johnson Computing Laboratory University of Kent at Canterbury Canterbury, Kent, CT2 7NF, England e-mail: C.G.Johnson@ukc.ac.uk Abstract: Genetic
Toward the Synthesis of Constraint Solvers Douglas R. Smith
Smith, Douglas R.
Toward the Synthesis of Constraint Solvers Douglas R. Smith Stephen J. Westfold Kestrel Institute Palo Alto, CA 94304 {smith,westfold}@kestrel.edu 2 November 2013 Abstract We develop a basic
Landscape responses to intraplate tectonism: Quantitative constraints from 10
Sandiford, Mike
Landscape responses to intraplate tectonism: Quantitative constraints from 10 Be nuclide abundances approach for identifying neotectonic forcing of landscape evolution in mildly deforming continental or absent, implying that 10 Be concentration may act as a `tracer' for disequilibrium landscapes responding
Data Structures for Generalised Arc Consistency for Extensional Constraints
St Andrews, University of
the extensional representation remains the most effective way to model a facet of a problem it is essential and structured problems. 2 Background The finite-domain constraint satisfaction problem (CSP) consists of
Optimization of Simple Tabular Reduction for Table Constraints
Paris-Sud XI, Université de
to any solution. It is an essential com- ponent of the Maintaining Arc Consistency (MAC) algorithm, which is commonly used to solve binary instances of the Constraint Satisfaction Problem (CSP). It is also
Modelling and solving the stable marriage problem using constraint programming
Manlove, D.F.
Manlove,D.F. O'Malley,G. Proceedings of the Fifth Workshop on Modelling and Solving Problems with Constraints, held at the 19th International Joint Conference on Artificial Intelligence (IJCAI 2005) pp 10-17
Supporting Collaboration through Semantic-based Work and Constraint Solving
Chen-Burger, Y-H; Hui, K-Y; Preece, A.D; Gray, P.M.D; Tate, Austin
This paper describes our efforts to provide a collaborative problem solving architecture driven by semantic-based workflow orchestration and constraint problem solving. These technologies are based on shared ontologies ...
Motion Planning for Unmanned Aerial Vehicles with Resource Constraints
Sundar, Kaarthik
2012-10-19T23:59:59.000Z
Small Unmanned Aerial Vehicles (UAVs) are currently used in several surveillance applications to monitor a set of targets and collect relevant data. One of the main constraints that characterize a small UAV is the maximum amount of fuel the vehicle...
On the critical flame radius and minimum ignition energy for spherical flame initiation
Chen, Zheng; Burke, M. P.; Ju, Yiguang
2011-01-01T23:59:59.000Z
Spherical flame initiation from an ignition kernel is studied theoretically and numerically using different fuel/oxygen/helium/argon mixtures (fuel: hydrogen, methane, and propane). The emphasis is placed on investigating the critical flame radius controlling spherical flame initiation and its correlation with the minimum ignition energy. It is found that the critical flame radius is different from the flame thickness and the flame ball radius and that their relationship depends strongly on the Lewis number. Three different flame regimes in terms of the Lewis number are observed and a new criterion for the critical flame radius is introduced. For mixtures with Lewis number larger than a critical Lewis number above unity, the critical flame radius is smaller than the flame ball radius but larger than the flame thickness. As a result, the minimum ignition energy can be substantially over-predicted (under-predicted) based on the flame ball radius (the flame thickness). The results also show that the minimum ignition energy for successful spherical flame initiation is proportional to the cube of the critical flame radius. Furthermore, preferential diffusion of heat and mass (i.e. the Lewis number effect) is found to play an important role in both spherical flame initiation and flame kernel evolution after ignition. It is shown that the critical flame radius and the minimum ignition energy increase significantly with the Lewis number. Therefore, for transportation fuels with large Lewis numbers, blending of small molecule fuels or thermal and catalytic cracking will significantly reduce the minimum ignition energy.
Solar system constraints on f(G) gravity models
Antonio De Felice; Shinji Tsujikawa
2009-07-10T23:59:59.000Z
We discuss solar system constraints on f(G) gravity models, where f is a function of the Gauss-Bonnet term G. We focus on cosmologically viable f(G) models that can be responsible for late-time cosmic acceleration. These models generally give rise to corrections of the form epsilon*(r/rs)^p to the vacuum Schwarzschild solution, where epsilon = H^2 rs^2 solar system constraints for a wide range of model parameters.
Leisure constraints which affect continued nonresident hunter participation
Cook, Kathrine Helen
1994-01-01T23:59:59.000Z
thesis research. I am grateful for their time, patience, and good humor. I would like to thank McAllister Maxwell, William Cook, Sara Steen, and Kelly Strnadel for their help preparing survey mailouts, offering advice, and continued support. Jason... not significantly different in the constraints they felt affected their hunting participation. Both groups listed no time due to family or work commitments, high lease cost, and distance as their greatest constraints to hunting in Texas. No significant...
Linearized Constraints in the Connection Representation: Hamilton-Jacobi Solution
J. N. Goldberg; D. C. Robinson
1994-05-11T23:59:59.000Z
Newman and Rovelli have used singular Hamilton-Jacobi transformations to reduce the phase space of general relativity in terms of the Ashtekar variables. Their solution of the gauge constraint cannot be inverted and indeed has no Minkowski space limit. Nonetheless, we exhibit an explicit Hamilton-Jacobi solution of all the linearized constraints. The result does not encourage an iterative solution, but it does indicate the origin of the singularity of the Newman-Rovelli result.
A class of nonholonomic kinematic constraints in elasticity
Joris Vankerschaver
2007-03-12T23:59:59.000Z
We propose a first example of a simple classical field theory with nonholonomic constraints. Our model is a straightforward modification of a Cosserat rod. Based on a mechanical analogy, we argue that the constraint forces should be modeled in a special way, and we show how such a procedure can be naturally implemented in the framework of geometric field theory. Finally, we derive the equations of motion and we propose a geometric integration scheme for the dynamics of a simplified model.
Constraints on new interactions from neutron scattering experiments
Yu. N. Pokotilovski
2006-01-19T23:59:59.000Z
Constraints for the constants of hypothetical Yukawa-type corrections to the Newtonian gravitational potential are obtained from analysis of neutron scattering experiments. Restrictions are obtained for the interaction range between 10^{-12} and 10^{-7} cm, where Casimir force experiments and atomic force microscopy are not sensitive. Experimental limits are obtained also for non-electromagnetic inverse power law neutron-nucleus potential. Some possibilities are discussed to strengthen these constraints.
Unparticle Effects on Unitarity Constraints from Higgs Boson Scattering
Xiao-Gang He; Chung-Cheng Wen
2008-06-10T23:59:59.000Z
We study the effects of two-body Higgs boson scattering by exchanging unpsrticles. The unparticle contribution can change the standard model prediction for two-body Higgs boson scattering partial wave amplitude significantly leading to modification of the unitarity constraint on the standard model Higgs boson mass. For unparticle dimension $d_\\U$ between 1 and 2, the unitarity constraint on Higgs boson mass can be larger than that in the SM. Information on unparticle interaction can also be obtained.
On the origin of the low temperatures resistivity minimum in Cr thin films
Osquiguil, E.; Tosi, L.; Kaul, E. E.; Balseiro, C. A. [Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, 8400 Bariloche (Argentina)
2013-12-28T23:59:59.000Z
We present measurements of the electrical resistivity and Hall coefficient, ? and R{sub H}, in Cr films of different thicknesses grown on MgO (100) substrates, as a function of temperature T and applied magnetic field H. The results show a low temperature minimum in ?(T), which is thickness dependent. From 40?K to 2?K, the Hall coefficient is a monotonous increasing function as T is reduced with no particular signature at the temperature T{sub min} where the minimum develops. We explain the resistivity minimum assuming an imperfect nesting of the Fermi surface leading to small electron and hole pockets. We introduce a phenomenological model which supports this simple physical picture.
Idetic: A High-level Synthesis Approach for Enabling Long Computations on Transiently-powered ASICs
that aims to find the checkpoints which incur minimum overhead and minimize recomputation energy cost. We operation, Idetic adaptively adjusts the checkpointing rate based on the available energy level and manufacturing cost, mass production justifies using ASIC solutions. In addition, recent advances in High- Level
Bogliolo, Alessandro
management of hardware components. Index Terms--Energy conservation, energy management, opti- mization and performance levels with a minimum number of active components or a minimum load on such com- ponents. DPM encompasses a set of techniques that achieves energy-efficient computation by selectively turning off (or re
CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set of
Zhao, Yuxiao
CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set to the variables in a way so that all constraints are (simultaneously) satisfied. The general CSP is NP-complete. However, when the CSP is restricted to a fixed constraint language (a set of allowed constraint
Comparing Usability of One-Way and Multi-Way Constraints for Diagram Editing
Marriott, Kimbal
efficient constraint solving techniques for interactive graphical applications [Badros 2000; Hower and Graf
Bachelor of Science with Major in Geology (Minimum of 120 credits required)
Fernandez, Eduardo
Bachelor of Science with Major in Geology (Minimum of 120 credits required) The Bachelor of Science (B.S.) degree is designed for students planning professional careers in geology, hydrogeology work in geology, geosciences and environmental science. Prerequisite Coursework for Transfer Students
Bachelor of Arts with Major in Geology: Earth and Space Science (Minimum of 120 credits required)
Belogay, Eugene A.
Bachelor of Arts with Major in Geology: Earth and Space Science (Minimum of 120 credits required) The Bachelor of Arts (B.A.) degree in Geology (Earth Science) is designed for students planning professional 2053 & 2048L 5 College Algebra MAC 1105 3 Introductory Statistics STA 2023 3 Total 19 Geology (Earth
Exploiting Schedule Slacks for RateOptimal PowerMinimum Software Pipelining #
Gao, Guang R.
Âengineered compiler on Wattch power simulator, we observe that our approach can reduce dynamic energy consumptionExploiting Schedule Slacks for RateÂOptimal PowerÂMinimum Software Pipelining # Hongbo Yang + R systems deÂ mand new compiler techniques geared toward both high performance and low power. Software
Minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems
Jordan, W.C.; Turner, J.C.
1992-12-01T23:59:59.000Z
A parametric calculational analysis has been performed in order to estimate the minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems. The analysis was performed using a version of the SCALE-4.0 code system and the 27-group ENDF/B-IV cross-section library. Water-moderated uranyl fluoride (UO[sub 2]F[sub 2] and H[sub 2]O) and hydrofluoric-acid-moderated uranium hexaflouride (UF[sub 6] and HF) systems were considered in the analysis over enrichments of 1.4 to 5 wt % [sup 235]U. Estimates of the minimum critical volume, minimum critical mass of uranium, and the minimum mass of moderator required for criticality are presented. There was significant disagreement between the values generated in this study when compared with a similar undocumented study performed in 1983 using ANISN and the Knight-modified Hansen-Roach cross sections. An investigation into the cause of the disagreement was made, and the results are presented.
Minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems
Jordan, W.C.; Turner, J.C.
1992-12-01T23:59:59.000Z
A parametric calculational analysis has been performed in order to estimate the minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems. The analysis was performed using a version of the SCALE-4.0 code system and the 27-group ENDF/B-IV cross-section library. Water-moderated uranyl fluoride (UO{sub 2}F{sub 2} and H{sub 2}O) and hydrofluoric-acid-moderated uranium hexaflouride (UF{sub 6} and HF) systems were considered in the analysis over enrichments of 1.4 to 5 wt % {sup 235}U. Estimates of the minimum critical volume, minimum critical mass of uranium, and the minimum mass of moderator required for criticality are presented. There was significant disagreement between the values generated in this study when compared with a similar undocumented study performed in 1983 using ANISN and the Knight-modified Hansen-Roach cross sections. An investigation into the cause of the disagreement was made, and the results are presented.
Buffer Sizing for Minimum Energy-Delay Product by Using an Approximating Polynomial
Pedram, Massoud
Buffer Sizing for Minimum Energy-Delay Product by Using an Approximating Polynomial Chang Woo Kang to derive sizing rules for buffered chains, which optimize the overall energy-delay product. Categories result in a poor solution in terms of the energy-delay product. The focus of this work is on multi
Johansson, Karl Henrik
, which minimizes the total energy consumption by controlling the radio power, is developed. Numerical Networks (WSNs). Energy consumption and reliability are analyzed for two coding schemes: Minimum Energy ME with respect to energy consumption and bit error rate. It is concluded that MME is more energy
Speech enhancement using a minimum mean-square error short-time spectral modulation magnitude In this paper we investigate the enhancement of speech by applying MMSE short-time spectral magnitude estimation on the quality of enhanced speech, and find that this method works better with speech uncertainty. Finally we
Comparison of VLF Wave Activity in the Solar Wind During Solar Maximum and Minimum
California at Berkeley, University of
second fast latitude scan (near the solar maximum) with the wave observations during the first fast Experiments (URAP) of Ulysses during its first orbit, which occurred when the solar activity was approachingComparison of VLF Wave Activity in the Solar Wind During Solar Maximum and Minimum: Ulysses
Achieving MinimumCost Multicast: A Decentralized Approach Based on Network Coding
MÃ©dard, Muriel
, a monetary or energy cost must be paid for each link usage) and the other that applies for strictly convexÂtoÂpoint links, and consider the problem of minimumÂenergy multicast in wireless networks as well as the case generally means finding the shortest tree connecting a set of points in a directed graph; in other words
MinimumEnergy Mobile Wireless Networks Revisited Li Li Joseph Y. Halpern
Li, Li Erran
at maximum power. Transmitting at maximum power requires a great deal of energy. To minimize energy usage, we for a graph to have this minimumÂenergy property. We use this characterization to construct a protocol called, SMECN has lower link mainÂ tenance costs than MECN and can achieve a significant saving in energy usage
Lai, Ying-Cheng
, Beijing 100875, China 2 School of Electrical, Computer, and Energy Engineering, Arizona State University the practical usage of our approach, its implementation elucidates, interestingly, the intricate relationship dynamics, which is based on the classical control and graph theories [9Â11]. The basic goal of the minimum
String method in collective variables: Minimum free energy paths and isocommittor surfaces
Van Den Eijnden, Eric
York University, New York, New York 10012 Giovanni Ciccottid INFM and Dipartimento di Fisica in the free energy. Provided that the number of collective variables is large enough, the new techniqueString method in collective variables: Minimum free energy paths and isocommittor surfaces Luca
The Potato Radius: a Lower Minimum Size for Dwarf Planets Charles H. Lineweaver & Marc Norman
Lineweaver, Charles H.
The Potato Radius: a Lower Minimum Size for Dwarf Planets Charles H. Lineweaver & Marc Norman a rounded potato shape to a sphere. We derive this potato-to-sphere transition radius -- or "potato radius" -- from first principles. Using the empirical potato radii of asteroids and icy moons, we derive
eVADER: A Perceptual Approach to Finding Minimum Warning Sound Requirements for Quiet Cars.
Paris-Sud XI, Université de
, such as hybrid and electric vehicles, to pedestrians has become an important issue for public policy [1], car a localization paradigm to test the detectability of hybrid and internal combustion cars by measuring listenereVADER: A Perceptual Approach to Finding Minimum Warning Sound Requirements for Quiet Cars. Ryan
A minimum-reaction-flux solution to master-equation models of protein folding
Weston, Ken
A minimum-reaction-flux solution to master-equation models of protein folding Huan-Xiang Zhoua; published online 20 May 2008 Master equations are widely used for modeling protein folding. Here- ceptual and quantitative models for protein folding.1Â15 In such models, the conformational space
Autopilot for a Nonlinear Non-Minimum Phase Tail-Controlled Missile
Valasek, John
Autopilot for a Nonlinear Non-Minimum Phase Tail-Controlled Missile Anshu Narang controlled missiles: 1. Exploiting the full physical capabilities of the missile system Fulfilling demanding aerodynamics is expensive and inaccurate Only certain states can be measured #12;3 Acceleration Control
A Laser Range Scanner Designed for Minimum Calibration Complexity James Davis, Xing Chen
Stanford University
A Laser Range Scanner Designed for Minimum Calibration Complexity James Davis, Xing Chen Computer are a popular method for acquiring three-dimensional geometry due to their accuracy and robustness. Maximizing a two camera range scanner design, specifically chosen to minimize calibration complexity and cost
Massachusetts at Amherst, University of
Requirements for the MINOR in Environmental Science Five courses required. Total credits = minimum to Environmental Science OR NRC 100 Environment and Society OR GEO-SCI 100 Global Environmental Change Select two (2) of following four courses ENVIRSCI 213 Introduction to Environmental Policy ENVIRSCI 214
The Blob Code is Competitive with EdgeSets in Genetic Algorithms for the Minimum
Julstrom, Bryant A.
with those of, a GA that encodes spanning trees as edge-sets on Euclidean instances of the minimum rout- ing Spanning Tree Problem Bryant A. Julstrom Department of Computer Science St. Cloud State University St. Cloud, MN, 56301 USA julstrom@stcloudstate.edu ABSTRACT Among the many codings of spanning trees
The minimum circuity frontier and the journey to work David Levinson a,
Levinson, David M.
The minimum circuity frontier and the journey to work David Levinson a, , Ahmed El-Geneidy b,1 economic theory, this suggests locators wish to locate on the frontier with the largest residential lot to be uniform, we cannot assume that all possible homeÂwork pairs are on the frontier. This finding, developed
LOWER BOUNDS ON THE GLOBAL MINIMUM OF A M. GHASEMI, J.B. LASSERRE, M. MARSHALL
Marshall, Murray
LOWER BOUNDS ON THE GLOBAL MINIMUM OF A POLYNOMIAL M. GHASEMI, J.B. LASSERRE, M. MARSHALL Abstract. We extend the method of Ghasemi and Marshall [SIAM. J. Opt. 22(2) (2012), pp 460-473], to obtain compare this bound with the (global) lower bound fgp ob- tained by Ghasemi and Marshall, and also
Power Controlled Minimum Frame Length Scheduling in TDMA Wireless Networks with
Arabshahi, Payman
Power Controlled Minimum Frame Length Scheduling in TDMA Wireless Networks with Sectored Antennas controlled min- imum frame length scheduling for TDMA wireless networks. Given a set of one-hop transmission scheduling and power control was first addressed by Tamer and Ephremides in [1, 2]. Given a set of one
BME BIOMEDICAL IMAGING CONCENTRATION F12 MS: 30 total credit hours minimum
Kamat, Vineet R.
BME BIOMEDICAL IMAGING CONCENTRATION Â F12 MS: 30 total credit hours minimum Advisor: Luis Hernandez-Garcia, Ph.D. (hernan@umich.edu) Biomedical Imaging: BIOMEDE 5161 Medical Imaging Systems (3) (I)2 General: BIOMEDE 500 Biomedical Engineering Seminar (1) (I,II) BIOMEDE 550 Ethics and Enterprise (1) (I
BME BIOMEDICAL IMAGING CONCENTRATION F11 MS: 30 total credit hours minimum
Eustice, Ryan
BME BIOMEDICAL IMAGING CONCENTRATION Â F11 MS: 30 total credit hours minimum Advisor: Luis Hernandez-Garcia, Ph.D. (hernan@umich.edu) Biomedical Imaging: BIOMEDE 5161 Medical Imaging Systems (3) (I)2 General: BIOMEDE 500 Biomedical Engineering Seminar (1) (I,II) BIOMEDE 550 Ethics and Enterprise (1) (I
Multireference nodal GPT approach to rodded constraints in reload optimization
Maldonado, G.I.; Engrand, P.R.; Beguinet, C.
1994-12-31T23:59:59.000Z
During a reload cycle design, a number of constraints must be considered to ensure that the resulting loading pattern satisfies all operational and safety limits. A pressurized water reactor (PWR) in-core nuclear fuel management optimization tool, such as the FORMOSA-P code, must therefore impose these constraints. Examples of typical constraints that must be satisfied by loading pattern candidates in a FORMOSA-P optimization include limits on power peaking, moderator temperature coefficient, region or local discharge burnup, and cycle length. Equally important, and recently implemented into a prototype version of FORMOSA-P at Electricite de France (EdF-Clamart), is the capability of imposing {open_quotes}rodded constraints.{close_quotes} In essence, along with all other requirements, a given loading pattern candidate must satisfy specific design criteria under the influence of selected control rod configurations. In France, where the load-follow operational mode of PWR plants is prevalent (due to France`s dominant fraction of nuclear-power-generated electricity), a core reload must typically satisfy power peaking design limits under seven different rod configurations, in addition to the all-rods-out (ARO) condition. This study describes the evaluation approach taken to address rodded constraints.
Tractable hypergraph properties for constraint satisfaction and conjunctive queries
Marx, Dániel
2009-01-01T23:59:59.000Z
An important question in the study of constraint satisfaction problems (CSP) is understanding how the graph or hypergraph describing the incidence structure of the constraints influences the complexity of the problem. For binary CSP instances (i.e., where each constraint involves only two variables), the situation is well understood: the complexity of the problem essentially depends on the treewidth of the graph of the constraints. However, this is not the correct answer if constraints with unbounded number of variables are allowed, and in particular, for CSP instances arising from query evaluation problems in database theory. Formally, if H is a class of hypergraphs, then let CSP(H) be CSP restricted to instances whose hypergraph is in H. Our goal is to characterize those classes of hypergraphs for which CSP(H) is polynomial-time solvable or fixed-parameter tractable, parameterized by the number of variables. Note that in the applications related to database query evaluation, we usually assume that the numbe...
Broader source: Energy.gov [DOE]
The purpose of these rules is to protect public health and the environment by establishing minimum standards for the proper location, design, construction and maintenance of onsite wastewater...
Generalized Chaplygin gas model: constraints from Hubble parameter versus Redshift Data
Puxun Wu; Hongwei Yu
2006-12-09T23:59:59.000Z
We examine observational constraints on the generalized Chaplygin gas (GCG) model for dark energy from the 9 Hubble parameter data points, the 115 SNLS Sne Ia data and the size of baryonic acoustic oscillation peak at redshift, $z=0.35$. At a 95.4% confidence level, a combination of three data sets gives $0.67\\leq A_s\\leq 0.83$ and $-0.21\\leq \\alpha\\leq 0.42$, which is within the allowed parameters ranges of the GCG as a candidate of the unified dark matter and dark energy. It is found that the standard Chaplygin gas model ($\\alpha=1$) is ruled out by these data at the 99.7% confidence level.
Transition redshift in $f(T)$ cosmology and observational constraints
Capozziello, Salvatore; Saridakis, Emmanuel N
2015-01-01T23:59:59.000Z
We extract constraints on the transition redshift $z_{tr}$, determining the onset of cosmic acceleration, predicted by an effective cosmographic construction, in the framework of $f(T)$ gravity. In particular, employing cosmography we obtain bounds on the viable $f(T)$ forms and their derivatives. Since this procedure is model independent, as long as the scalar curvature is fixed, we are able to determine intervals for $z_{tr}$. In this way we guarantee that the Solar-System constraints are preserved and moreover we extract bounds on the transition time and the free parameters of the scenario. We find that the transition redshifts predicted by $f(T)$ cosmology, although compatible with the standard $\\Lambda$CDM predictions, are slightly smaller. Finally, in order to obtain observational constraints on $f(T)$ cosmology, we perform a Monte Carlo fitting using supernova data, involving the most recent union 2.1 data set.
MISO Capacity with Per-Antenna Power Constraint
Vu, Mai
2010-01-01T23:59:59.000Z
We establish in closed-form the capacity and the optimal signaling scheme for a MISO channel with per-antenna power constraint. Two cases of channel state information are considered: constant channel known at both the transmitter and receiver, and Rayleigh fading channel known only at the receiver. For the first case, the optimal signaling scheme is beamforming with the phases of the beam weights matched to the phases of the channel coefficients, but the amplitudes independent of the channel coefficients and dependent only on the constrained powers. For the second case, the optimal scheme is to send independent signals from the antennas with the constrained powers. In both cases, the capacity with per-antenna power constraint is usually less than that with sum power constraint.
Cosmological and astrophysical constraints on superconducting cosmic strings
Miyamoto, Koichi [Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582 (Japan); Nakayama, Kazunori, E-mail: miyamone@icrr.u-tokyo.ac.jp, E-mail: kazunori@hep-th.phys.s.u-tokyo.ac.jp [Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan)
2013-07-01T23:59:59.000Z
We investigate the cosmological and astrophysical constraints on superconducting cosmic strings (SCSs). SCS loops emit strong bursts of electromagnetic waves, which might affect various cosmological and astrophysical observations. We take into account the effect on the CMB anisotropy, CMB blackbody spectrum, BBN, observational implications on radio wave burst and X-ray or ?-ray events, and stochastic gravitational wave background measured by pulsar timing experiments. We then derive constraints on the parameters of SCS from current observations and estimate prospects for detecting SCS signatures in on-going observations. As a result, we find that these constraints exclude broad parameter regions, and also that on-going radio wave observations can probe large parameter space.
Neutron stars in f(R) gravity with perturbative constraints
Cooney, Alan; DeDeo, Simon; Psaltis, Dimitrios [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States); Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, New Mexico 87501 (United States); Departments of Astronomy and Physics, University of Arizona, Tucson, Arizona 85721 (United States)
2010-09-15T23:59:59.000Z
We study the structure of neutron stars in f(R) gravity theories with perturbative constraints. We derive the modified Tolman-Oppenheimer-Volkov equations and solve them for a polytropic equation of state. We investigate the resulting modifications to the masses and radii of neutron stars and show that observations of surface phenomena alone cannot break the degeneracy between altering the theory of gravity versus choosing a different equation of state of neutron-star matter. On the other hand, observations of neutron-star cooling, which depends on the density of matter at the stellar interior, can place significant constraints on the parameters of the theory.
Mechanical contact by constraints and split-based preconditioning
Dmitry Karpeyev; Derek Gaston; Jason Hales; Steven Novascone
2014-03-01T23:59:59.000Z
An accurate implementation of glued mechanical contact was developed in MOOSE based on its Constraint system. This approach results in a superior convergence of elastic structure problems, in particular in BISON. Adaptation of this technique to frictionless and frictional contact models is under way. Additionally, the improved convergence of elastic problems results from the application of the split-based preconditioners to constraint-based systems. This yields a substantial increase in the robustness of elastic solvers when the number of nodes in contact is increased and/or the mesh is refined.
TeV Astrophysics Constraints on Planck Scale Lorentz Violation
Ted Jacobson; Stefano Liberati; David Mattingly
2002-09-24T23:59:59.000Z
We analyze observational constraints from TeV astrophysics on Lorentz violating nonlinear dispersion for photons and electrons without assuming any a priori equality between the photon and electron parameters. The constraints arise from thresholds for vacuum Cerenkov radiation, photon decay and photo-production of electron-positron pairs. We show that the parameter plane for cubic momentum terms in the dispersion relations is constrained to an order unity region in Planck units. We find that the threshold configuration can occur with an asymmetric distribution of momentum for pair creation, and with a hard photon for vacuum Cerenkov radiation.
Constraints on the density dependence of the symmetry energy
M. B. Tsang; Yingxun Zhang; P. Danielewicz; M. Famiano; Zhuxia Li; W. G. Lynch; A. W. Steiner
2008-11-19T23:59:59.000Z
Collisions involving 112Sn and 124Sn nuclei have been simulated with the improved Quantum Molecular Dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at sub-normal density are obtained. Results from present work are compared to constraints put forward in other recent analysis.
Constraints on the Density Dependence of the Symmetry Energy
Tsang, M. B.; Danielewicz, P.; Lynch, W. G.; Steiner, A. W. [Joint Institute of Nuclear Astrophysics and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); Physics and Astronomy Department, Michigan State University, East Lansing, Michigan 48824 (United States); Zhang Yingxun [Joint Institute of Nuclear Astrophysics and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); China Institute of Atomic Energy, P.O. Box 275 (18), Beijing 102413 (China); Famiano, M. [Physics Department, Western Michigan University, Kalamazoo, Michigan 49008 (United States); Li, Zhuxia [China Institute of Atomic Energy, P.O. Box 275 (18), Beijing 102413 (China)
2009-03-27T23:59:59.000Z
Collisions involving {sup 112}Sn and {sup 124}Sn nuclei have been simulated with the improved quantum molecular dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at subnormal density are obtained. The results from the present work are compared to constraints put forward in other recent analyses.
Constraints on the density dependence of the symmetry energy
Tsang, M B; Danielewicz, P; Famiano, M; Li, Zhuxia; Lynch, W G; Steiner, A W
2008-01-01T23:59:59.000Z
Collisions involving 112Sn and 124Sn nuclei have been simulated with the improved Quantum Molecular Dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at sub-normal density are obtained. Results from present work are compared to constraints put forward in other recent analysis.
Gamma Ray Burst Constraints on Ultraviolet Lorentz Invariance Violation
Tina Kahniashvili; Grigol Gogoberidze; Bharat Ratra
2006-10-20T23:59:59.000Z
We present a unified general formalism for ultraviolet Lorentz invariance violation (LV) testing through electromagnetic wave propagation, based on both dispersion and rotation measure data. This allows for a direct comparison of the efficacy of different data to constrain LV. As an example we study the signature of LV on the rotation of the polarization plane of $\\gamma$-rays from gamma ray bursts in a LV model. Here $\\gamma$-ray polarization data can provide a strong constraint on LV, 13 orders of magnitude more restrictive than a potential constraint from the rotation of the cosmic microwave background polarization proposed by Gamboa, L\\'{o}pez-Sarri\\'{o}n, and Polychronakos (2006).
Calhoun, Benton H.
for Minimum Energy Sizing influences the energy consumption of a circuit in two primary ways. First, sizing have low energy as the primary concern instead of performance. Minimum energy operation for low directly affects energy consumption by changing switched capacitance and leakage current. Sec- ondly
Design Considerations for an On-Demand Minimum Energy Routing Protocol for a Wireless Ad Hoc Network
Brown, Timothy X.
1 Design Considerations for an On-Demand Minimum Energy Routing Protocol for a Wireless Ad Hoc- demand minimum energy routing protocol and suggests mechanisms for their implementation. We highlight of an 'energy aware' link cache for storing this information. We also compare the performance of an on-demand
Michalek, Jeremy J.
for minimum life cycle greenhouse gas emissions and cost Elizabeth Traut a,n , Chris Hendrickson b,1 , Erica and dedicated workplace charging infrastructure in the fleet for minimum life cycle cost or GHG emissions over vehicle and battery costs are the major drivers for PHEVs and BEVs to enter and dominate the cost
Global Minimum Determination of the Born-Oppenheimer Surface within Density Functional Theory
Goedecker, Stefan; Hellmann, Waldemar; Lenosky, Thomas [Institut fuer Physik, Universitaet Basel, Klingelbergstrasse 82, 4056 Basel (Switzerland); Physics Department, Ohio State University, 1040 Physics Research Building, 191 West Woodruff Avenue, Columbus, Ohio 43210-1117 (United States)
2005-07-29T23:59:59.000Z
We present a novel method, which we refer to as the dual minima hopping method, that allows us to find the global minimum of the potential energy surface (PES) within density functional theory for systems where a fast but less accurate calculation of the PES is possible. This method can rapidly find the ground state configuration of clusters and other complex systems with present day computer power by performing a systematic search. We apply the new method to silicon clusters. Even though these systems have already been extensively studied by other methods, we find new global minimum candidates for Si{sub 16} and Si{sub 19}, as well as new low-lying isomers for Si{sub 16}, Si{sub 17}, and Si{sub 18}.
On the minimum and maximum mass of neutron stars and the delayed collapse
Strobel, K; Strobel, Klaus; Weigel, Manfred K.
2001-01-01T23:59:59.000Z
The minimum and maximum mass of protoneutron stars and neutron stars are investigated. The hot dense matter is described by relativistic (including hyperons) and non-relativistic equations of state. We show that the minimum mass ($\\sim$ 0.88 - 1.28 $M_{\\sun}$) of a neutron star is determined by the earliest stage of its evolution and is nearly unaffected by the presence of hyperons. The maximum mass of a neutron star is limited by the protoneutron star or hot neutron star stage. Further we find that the delayed collapse of a neutron star into a black hole during deleptonization is not only possible for equations of state with softening components, as for instance, hyperons, meson condensates etc., but also for neutron stars with a pure nucleonic-leptonic equation of state.
On the minimum and maximum mass of neutron stars and the delayed collapse
Klaus Strobel; Manfred K. Weigel
2000-12-14T23:59:59.000Z
The minimum and maximum mass of protoneutron stars and neutron stars are investigated. The hot dense matter is described by relativistic (including hyperons) and non-relativistic equations of state. We show that the minimum mass ($\\sim$ 0.88 - 1.28 $M_{\\sun}$) of a neutron star is determined by the earliest stage of its evolution and is nearly unaffected by the presence of hyperons. The maximum mass of a neutron star is limited by the protoneutron star or hot neutron star stage. Further we find that the delayed collapse of a neutron star into a black hole during deleptonization is not only possible for equations of state with softening components, as for instance, hyperons, meson condensates etc., but also for neutron stars with a pure nucleonic-leptonic equation of state.
Communication: Minimum in the thermal conductivity of supercooled water: A computer simulation study
Bresme, F., E-mail: f.bresme@imperial.ac.uk [Chemical Physics Section, Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom and Department of Chemistry, Norwegian University of Science and Technology, Trondheim 7491 (Norway); Biddle, J. W.; Sengers, J. V.; Anisimov, M. A. [Institute for Physical Science and Technology, and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742 (United States)] [Institute for Physical Science and Technology, and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742 (United States)
2014-04-28T23:59:59.000Z
We report the results of a computer simulation study of the thermodynamic properties and the thermal conductivity of supercooled water as a function of pressure and temperature using the TIP4P-2005 water model. The thermodynamic properties can be represented by a two-structure equation of state consistent with the presence of a liquid-liquid critical point in the supercooled region. Our simulations confirm the presence of a minimum in the thermal conductivity, not only at atmospheric pressure, as previously found for the TIP5P water model, but also at elevated pressures. This anomalous behavior of the thermal conductivity of supercooled water appears to be related to the maximum of the isothermal compressibility or the minimum of the speed of sound. However, the magnitudes of the simulated thermal conductivities are sensitive to the water model adopted and appear to be significantly larger than the experimental thermal conductivities of real water at low temperatures.
GARCH models without positivity constraints: Exponential or Christian Francq
GARCH models without positivity constraints: Exponential or Log GARCH? Christian Francq , Olivier of the log-GARCH and EGARCH models, which both rely on multiplicative volatility dynamics without positivity, tails) of the EGARCH model, which are already known, with those of an asymmetric version of the log-GARCH
SCIL --Symbolic Constraints in Integer Linear Programming \\Lambda Ernst Althaus
Mehlhorn, Kurt
want short development time (= efficient use of human resources) and runtime efficiency (= efficient introduces symbolic constraints into branchÂandÂcutÂandÂprice algorithms for integer linear programs for integer linear programming (ILP) and mixed integer linear programming (MILP) based on a branchÂandÂcutÂandÂprice
Ensemble climate predictions using climate models and observational constraints
REVIEW Ensemble climate predictions using climate models and observational constraints BY PETER A. STOTT 1,* AND CHRIS E. FOREST 2 1 Hadley Centre for Climate Change (Reading Unit), Meteorology Building for constraining climate predictions based on observations of past climate change. The first uses large ensembles
Extending an Algebraic Modeling Language to Support Constraint ...
4er PowerMac G4
2001-04-02T23:59:59.000Z
Department of Industrial Engineering and Management Sciences ..... method for seeking the best objective value over all feasible solutions. Global ...... [15] ILOG, Inc., ILOG OPL Studio 3.0 User's Manual and OPL Studio 3.0 Optimization ... In Principles and Practice of Constraint Programming — CP'99, Joxan Jaffar, ed.,.
Grouping maintenance strategy with availability constraint under limited
Paris-Sud XI, UniversitÃ© de
with significant assumptions: maintenance durations are neglected and only one preventive maintenance for eachGrouping maintenance strategy with availability constraint under limited repairmen Phuc Do Van Hai maintenance strategies of multi-component systems by integrating two efficient optimization algorithms
Wind Farm Portfolio Optimization under Network Capacity Constraints
Paris-Sud XI, Université de
1 Wind Farm Portfolio Optimization under Network Capacity Constraints H´el`ene Le Cadre, Anthony of wind farms in a Market Coupling organization, for two Market Designs (exogenous prices and endogenous of efficient wind farm portfolios, is derived theoretically as a function of the number of wind farms
Cosmological Constraints from the SDSS maxBCG Cluster Catalog
Rozo, Eduardo; /CCAPP; Wechsler, Risa H.; /KIPAC, Menlo Park /SLAC; Rykoff, Eli S.; /UC, Santa Barbara; Annis, James T.; /Fermilab; Becker, Matthew R.; /Chicago U. /KICP, Chicago; Evrard, August E.; /Michigan U. /Michigan U., MCTP; Frieman, Joshua A.; /Fermilab /KICP, Chicago /Chicago U.; Hansen, Sarah M.; /UC, Santa Cruz; Hao, Jia; /Michigan U.; Johnston, David E.; /Northwestern U.; Koester, Benjamin P.; /KICP, Chicago /Chicago U.; McKay, Timothy A.; /Michigan U. /Michigan U., MCTP; Sheldon, Erin S.; /Brookhaven; Weinberg, David H.; /CCAPP /Ohio State U.
2009-08-03T23:59:59.000Z
We use the abundance and weak lensing mass measurements of the SDSS maxBCG cluster catalog to simultaneously constrain cosmology and the richness-mass relation of the clusters. Assuming a flat {Lambda}CDM cosmology, we find {sigma}{sub 8}({Omega}{sub m}/0.25){sup 0.41} = 0.832 {+-} 0.033 after marginalization over all systematics. In common with previous studies, our error budget is dominated by systematic uncertainties, the primary two being the absolute mass scale of the weak lensing masses of the maxBCG clusters, and uncertainty in the scatter of the richness-mass relation. Our constraints are fully consistent with the WMAP five-year data, and in a joint analysis we find {sigma}{sub 8} = 0.807 {+-} 0.020 and {Omega}{sub m} = 0.265 {+-} 0.016, an improvement of nearly a factor of two relative to WMAP5 alone. Our results are also in excellent agreement with and comparable in precision to the latest cosmological constraints from X-ray cluster abundances. The remarkable consistency among these results demonstrates that cluster abundance constraints are not only tight but also robust, and highlight the power of optically-selected cluster samples to produce precision constraints on cosmological parameters.
Collaboration Support Through Mobile Processes and Entailment Constraints
Ulm, Universität
mobile process and task support. In this context, flexible process management technology offers promising in many business domains. Along this trend, process management technology is going to be enhanced entailment constraints to mobile task management. In the context of a business process, for example, two
Energy Conservation Constraints on Multiplicity Correlations in QCD Jets
J. -L. Meunier; R. Peschanski
1996-03-13T23:59:59.000Z
We compute analytically the effects of energy conservation on the self-similar structure of parton correlations in QCD jets. The calculations are performed both in the constant and running coupling cases. It is shown that the corrections are phenomenologically sizeable. On a theoretical ground, energy conservation constraints preserve the scaling properties of correlations in QCD jets beyond the leading log approximation.
Hierarchical clustering using correlation metric and spatial continuity constraint
Stork, Christopher L.; Brewer, Luke N.
2012-10-02T23:59:59.000Z
Large data sets are analyzed by hierarchical clustering using correlation as a similarity measure. This provides results that are superior to those obtained using a Euclidean distance similarity measure. A spatial continuity constraint may be applied in hierarchical clustering analysis of images.
Temporal Conditions and Integrity Constraints in Active Database Systems \\Lambda
Wolfson, Ouri E.
database history. The evaluation algorithm is also an addÂon component, executed on top of, and usingTemporal Conditions and Integrity Constraints in Active Database Systems \\Lambda A. Prasad Sistla, for specifying conditions and events in the rules for active database sysÂ tem. This language permits
On the Complexity of Fuzzy Boolean Constraint Satisfaction Problems
Richoux, Florian
of tractability, and show how they can be applied in digital photography. Keywords-Fuzzy Theory and Models, Fuzzy) as well as after the actual photographic action; video games; pattern recognition and machine vision of the concept of fuzziness, fuzzy constraint satisfaction problems (FCSP) model real-life problems better
Scalar Field Models: From the Pioneer Anomaly to Astrophysical Constraints
J. Paramos
2005-05-17T23:59:59.000Z
In this work we study how scalar fields may affect solar observables, and use the constraint on the Sun's central temperature to extract bounds on the parameters of relevant models. Also, a scalar field driven by a suitable potential is shown to produce an anomalous acceleration similar to the one found in the Pioneer anomaly.
Multi-Rank Adaptive Beamforming with Linear and Quadratic Constraints
Pezeshki, Ali
Multi-Rank Adaptive Beamforming with Linear and Quadratic Constraints Henry Cox, Ali Pezeshki the signal is either rank-one of unknown orientation in a subspace or multi-rank. Only signal. The unifying component is the multi-rank MVDR beamformer followed by post processing. Detection statistics
Solving an Air Conditioning System Problem using Constraint Satisfaction
Paris-Sud XI, UniversitÃ© de
Solving an Air Conditioning System Problem using Constraint Satisfaction RaphaÃ«l Chenouard1 An air conditioning system problem 1.1 Context The design process is a sequence of phases ranging from States (2007)" DOI : 10.1007/978-3-540-74970-7_4 #12;In this paper, an air conditioning system (ACS
QER Public Meeting: New England Regional Infrastructure Constraints Part II
Broader source: Energy.gov [DOE]
The Department of Energy will convene a public meeting to discuss and receive comments on issues related to the Quadrennial Energy Review. The purpose of the meeting is to examine energy infrastructure constraints in New England and regional approaches to addressing them
QER Public Meeting: New England Regional Infrastructure Constraints Part I
Broader source: Energy.gov [DOE]
The Department of Energy will convene a public meeting to discuss and receive comments on issues related to the Quadrennial Energy Review. The purpose of the meeting is to examine energy infrastructure constraints in New England and regional approaches to addressing them
Boolean Satisfiability with Transitivity Constraints RANDAL E. BRYANT
Bryant, Randal E.
Boolean Satisfiability with Transitivity Constraints RANDAL E. BRYANT MIROSLAV N. VELEV Carnegie by the Semiconductor Research Corporation, Contract 00DC068. Authors' addresses: R. E. Bryant, Computer Science. V, No. N, August 2001, Pages 1--22. #12; 2 #1; R. E. Bryant and M. N. Velev that F sat does
Opportunistic Scheduling for utility maximization under QoS constraints
Bahk, Saewoong
1 Opportunistic Scheduling for utility maximization under QoS constraints Neung-Hyung Lee, Jin. Our opportunistic scheduling aims at maximizing the utility which is usually expressed as a function of user throughput. In this paper we derive an off-line optimal scheduling policy by optimization theory
Constraints to Stop Deforestation FB IV Informatik, Universitat Trier,
Seidl, Helmut
Constraints to Stop Deforestation H. Seidl FB IV Â Informatik, UniversitÂ¨at Trier, DÂ54286 Trier, Universitetsparken 1, DKÂ2100 Copenhagen Ã?, Denmark. rambo@diku.dk Abstract Wadler's deforestation algorithm, deforestation must terminate on all programs. Several techniques exist to ensure termination of deÂ forestation
Constraints to Stop HigherOrder Deforestation FB IV Informatik
Seidl, Helmut
Constraints to Stop HigherÂOrder Deforestation H. Seidl FB IV Â Informatik UniversitÂ¨at Trier, D of Copenhagen Universitetsparken 1, DKÂ2100 Copenhagen Ã?, Denmark rambo@diku.dk Abstract Wadler's deforestation in a compiler, it must terminate on all programs. Several techniques to ensure termiÂ nation of deforestation
Elimination of Algebraic Constraints in Power System Studies
Cañizares, Claudio A.
of transformer taps and boilers are ig- nored. When analyzing components with fast dynamics the analysis is done are ignored, the di erential equation used to model that component is transformed into an algebraicconstraintElimination of Algebraic Constraints in Power System Studies William D. Rosehart Claudio A. Ca
Constraint Management in Fuel Cells: A Fast Reference Governor Approach
Stefanopoulou, Anna
admissible current demand to the fuel cell based on on-line optimization of a scalar parameter and onConstraint Management in Fuel Cells: A Fast Reference Governor Approach Ardalan Vahidi Ilya Kolmanovsky Anna Stefanopoulou Abstract-- The air supply system in a fuel cell may be susceptible
Financial Constraints as a Barrier to Export Participation
Paris-Sud XI, UniversitÃ© de
be called for to help efficient but financially constrained firms to overcome the sunk entry costs constraint; Sunk costs JEL Classification: F14; G32; L25; D92 University of Nice - Sophia Antipolis the role of sunk entry costs into export markets (Baldwin, 1988; Roberts and Tybout, 1997; Melitz, 2003
Energy-aware scheduling under reliability and makespan constraints
Paris-Sud XI, Université de
Energy-aware scheduling under reliability and makespan constraints Guillaume Aupy, Anne Benoit and complementary. I. INTRODUCTION Energy-aware scheduling has proven an important issue in the past decade, both this interval at speed f. Energy-aware scheduling aims at minimizing the energy consumed during the execution
Nanobiosensors Constraint of DNA on Functionalized Graphene Improves
Aksay, Ilhan A.
Nanobiosensors Constraint of DNA on Functionalized Graphene Improves its Biostability, Jun Liu, and Yuehe Lin* Graphene, a single-layer carbon crystal, is attracting increasing attention strength, and biocompa- tibility.[1a,c,,2] Recently, functionalized graphene has been successfully used
Methods for Learning Control Policies from Variable-Constraint
Vijayakumar, Sethu
, we explore the problem of learning control policies from data containing variable, dynamic and non, the door acts as an environmental constraint that restricts the movement of ones hand along the opening arc of the door. When stirring soup in a saucepan, the sides of the pan prevent the spoon moving beyond
Alan M. Frisch and Jimmy Lee (Ed.) Constraint Modelling and
St Andrews, University of
Alan M. Frisch and Jimmy Lee (Ed.) Constraint Modelling and Reformulation (ModRef'09) Eighth 2009 Alan M. Frisch and Jimmy Lee Programme Chairs #12;Programme Committee Sebastian Brand (University University, United Kingdom) (Co-Chair) Jimmy Lee (The Chinese University of Hong Kong, China) Toni Mancini
Maintenance scheduling problems as benchmarks for constraint algorithms
Dechter, Rina
a power plant. We show how these scheduling prob- lems can be cast as constraint satisfaction problems ect any real life situations. In this paper we demonstrate another method for comparing CSP search plant. Our approach was to de ne a formal model which captures most of the interesting characteristics
Maintenance scheduling problems as benchmarks for constraint algorithms
Dechter, Rina
units within a power plant. We show how these scheduling probÂ lems can be cast as constraint another method for comparing CSP search algoÂ rithms, by applying them to random problems that have been units within an electric power plant. Our approach was to define a formal model which captures most
Exploiting Monotonicity Constraints in Active Learning for Ordinal Classification
Utrecht, Universiteit
Utrecht University, Utrecht, The Netherlands www.cs.uu.nl #12;ISSN: 0924-3275 Department of Information and Computing Sciences Utrecht University P.O. Box 80.089 3508 TB Utrecht The Netherlands #12;Exploiting Monotonicity Constraints in Active Learning for Ordinal Classification Pieter Soons Universiteit Utrecht
Lifting Integrity Constraints in Binary Aggregation Umberto Grandi
Endriss, Ulle
Lifting Integrity Constraints in Binary Aggregation Umberto Grandi and Ulle Endriss Institute language and we explore the question of whether or not a given aggregation procedure will lift a given, this discipline has received increasing attention in Artificial Intelligence (AI), as testified by a large number
Constraints on Dark Energy Models from Weak Gravity Conjecture
Ximing Chen; Jie Liu; Yungui Gong
2008-06-15T23:59:59.000Z
We study the constraints on the dark energy model with constant equation of state parameter $w=p/\\rho$ and the holographic dark energy model by using the weak gravity conjecture. The combination of weak gravity conjecture and the observational data gives $wenergy model realized by a scalar field is in swampland.
Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint
Greenberg, Albert
Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint Zhe Wang Electrical--In this paper, we develop efficient algorithm to obtain the optimal energy schedule for fading channel with energy harvesting. We assume that the side information of both the channel states and energy harvesting
Constraint Orientated Specification with CSP and Real Time Temporal Logic
Kent, University of
Constraint Orientated Specification with CSP and Real Time Temporal Logic Justin Pearson Department Processes (CSP) [Hoa85] and a version of Propositional Temporal Logic (PTL), derived from [Eme90]. CSP. The behaviour of a CSP process is dependent on its environment; it is therefore difficult to assert global
On the Equivalence of Constraint Satisfaction Francesca Rossi1
their information content is essentially identical. In other words, it is only the information content of a CSP was visiting MCC. #12;Abstract A solution of a Constraint Satisfaction Problem (CSP) is an assignment of values notion of equivalence. Two di erent algorithms, currently used for transforming any non-binary CSP
Essential Convexity and Complexity of Semi-Algebraic Constraints
Bodirsky, Manuel
a, b, then we show that the CSP for is NP-hard. Furthermore, we characterize essentially convex, ), then the CSP for can be solved in polynomial time if and only if all relations in are essentially convexEssential Convexity and Complexity of Semi-Algebraic Constraints Manuel Bodirsky1 , Peter Jonsson2
Constraints on the density perturbation spectrum from primordial black holes
Anne M Green; Andrew R Liddle
1997-04-25T23:59:59.000Z
We re-examine the constraints on the density perturbation spectrum, including its spectral index $n$, from the production of primordial black holes. The standard cosmology, where the Universe is radiation dominated from the end of inflation up until the recent past, was studied by Carr, Gilbert and Lidsey; we correct two errors in their derivation and find a significantly stronger constraint than they did, $n \\lesssim 1.25$ rather than their 1.5. We then consider an alternative cosmology in which a second period of inflation, known as thermal inflation and designed to solve additional relic over-density problems, occurs at a lower energy scale than the main inflationary period. In that case, the constraint weakens to $n \\lesssim 1.3$, and thermal inflation also leads to a `missing mass' range, $10^{18} g \\lesssim M \\lesssim 10^{26} g$, in which primordial black holes cannot form. Finally, we discuss the effect of allowing for the expected non-gaussianity in the density perturbations predicted by Bullock and Primack, which can weaken the constraints further by up to 0.05.
Thermal and digestive constraints to foraging behaviour in marine mammals
Thermal and digestive constraints to foraging behaviour in marine mammals David A. S. Rosen1 digestive limitations to food intake and thermoregulation. The ability of an animal to consume sufficient by maximum digestion capacity and the time devoted to digestion). Failure to consume sufficient prey
Planning Motions for Robotic Systems Subject to Differential Constraints
De Luca, Alessandro
Planning Motions for Robotic Systems Subject to Differential Constraints Alessandro De Luca of planning point-to-point motion for general robotic systems subject to non-integrable differential feedback linearization, are illustrated with the aid of four case studies: the plate-ball manipulation
SPECTRUM OPPORTUNITY AND INTERFERENCE CONSTRAINT IN OPPORTUNISTIC SPECTRUM ACCESS
Islam, M. Saif
of the radio spec- trum? Actual spectrum usage measurements obtained by the FCC's Spectrum Policy Task Force [1SPECTRUM OPPORTUNITY AND INTERFERENCE CONSTRAINT IN OPPORTUNISTIC SPECTRUM ACCESS Qing Zhao@ece.ucdavis.edu ABSTRACT In this paper, we study two important concepts in opportunis- tic spectrum access: spectrum
A Two-Constraint Approach to Risky CyberSecurity
Faber, Ted
A Two-Constraint Approach to Risky CyberSecurity Experiment Management John Wroclawski, Jelena Mirkovic, Ted Faber, Stephen Schwab #12;Risky CyberSecurity Research CyberSecurity systems becoming more;Domains of interest Traditional risky experiment Virus dissection Modern risky CyberSecurity
Presolar Silicate Grains: Constraints on Solar System Processes and
Floss, Christine
Presolar Silicate Grains: Constraints on Solar System Processes and Stellar Nucleosynthesis 63130, USA. (floss@wustl.edu) Presolar silicates are among the most abundant type of stardust and have. This is particularly true for presolar silicates, which are more susceptible to secondary processing than other, more
The CIFF Proof Procedure for Abductive Logic Programming with Constraints
Toni, Francesca
The CIFF Proof Procedure for Abductive Logic Programming with Constraints U. Endriss1 , P,terreni,toni}@di.unipi.it Abstract. We introduce a new proof procedure for abductive logic pro- gramming and present two soundness results. Our procedure extends that of Fung and Kowalski by integrating abductive reasoning
Mineralogical constraints on the paleoenvironments of the Ediacaran Doushantuo Formation
Jiang, Ganqing
Mineralogical constraints on the paleoenvironments of the Ediacaran Doushantuo Formation Thomas F. In this paper, the clay mineralogy of the Doushan- tuo Formation in South China is documented, providing document the clay mineralogy of the Dou- shantuo Formation with the aim of providing information about
Kalman Filtering with Inequality Constraints for Turbofan Engine Health Estimation
Simon, Dan
Constraints, Estimation, Quadratic Pro- gramming, Gas Turbine Engines. 1 Introduction For linear dynamic simulation of a turbofan engine to estimate health parameters. The turbofan engine model con- tains 16 state. However, in the application of Kalman Â¯lters there is often known model or signal information
A Constraint-Reduced Variant of Mehrotra's Predictor-Corrector ...
2010-09-07T23:59:59.000Z
Abstract. Consider linear programs in dual standard form with n constraints and m variables. ..... The first such property is the monotonic increase of bTy mentioned previously. While ...... paper, Department of Management Science, University of Iowa, 1991. [Gay85] ... Meiyun Y. He, personal communication, 2010
Codes and sofic constraints Marie-Pierre Beal
Paris-Sud XI, UniversitÃ© de
Codes and sofic constraints Marie-Pierre BÂ´eal Dominique Perrin January 14, 2005 Abstract We study-la-VallÂ´ee Cedex 2, France. {beal,perrin}@univ-mlv.fr 1 hal-00619227,version1-5Sep2011 Author manuscript, published
A minimum hypothesis explanation for an IMF with a lognormal body and power law tail
Shantanu Basu; C. E. Jones
2004-11-15T23:59:59.000Z
We present a minimum hypothesis model for an IMF that resembles a lognormal distribution at low masses but has a distinct power-law tail. Even if the central limit theorem ensures a lognormal distribution of condensation masses at birth, a power-law tail in the distribution arises due to accretion from the ambient cloud, coupled with a non-uniform (exponential) distribution of accretion times.
Feedback control design for smooth, near-minimum time rotational maneuvers of flexible spacecraft
Byers, Robert Michael
1987-01-01T23:59:59.000Z
' Rest ? to-Rest Maneuver LQR Control: 15' Rest ? to-Rest Maneuver Initial Displacement Angle vs. Maneuver Time Minimum Time and LQR Control Control Profiles and Frequency Spectra Smoothing Functions Smooth Feedback Control with Parabolic Switching... is approximated by the hyperbolic tangent (tanh) function. The parabolic switching line associated with the rigid body control is replaced by one which, also using the hyperbolic tangent function, exploits the symmetry of the rigid body state trajectory about...
THINNING OF THE SUN'S MAGNETIC LAYER: THE PECULIAR SOLAR MINIMUM COULD HAVE BEEN PREDICTED
Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Broomhall, Anne-Marie; Chaplin, William J.; Elsworth, Yvonne, E-mail: sarbani.basu@yale.edu [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom)
2012-10-10T23:59:59.000Z
The solar magnetic activity cycle causes changes in the Sun on timescales that are equivalent to human lifetimes. The minimum solar activity that preceded the current solar cycle (cycle 24) was deeper and quieter than any other recent minimum. Using data from the Birmingham Solar Oscillations Network (BiSON), we show that the structure of the solar sub-surface layers during the descending phase of the preceding cycle (cycle 23) was very different from that during cycle 22. This leads us to believe that a detailed examination of the data would have led to the prediction that the cycle 24 minimum would be out of the ordinary. The behavior of the oscillation frequencies allows us to infer that changes in the Sun that affected the oscillation frequencies in cycle 23 were localized mainly to layers above about 0.996 R{sub Sun }, depths shallower than about 3000 km. In cycle 22, on the other hand, the changes must have also occurred in the deeper-lying layers.
Free Magnetic Energy in Solar Active Regions above the Minimum-Energy Relaxed State
S. Regnier; E. R. Priest
2008-05-12T23:59:59.000Z
To understand the physics of solar flares, including the local reorganisation of the magnetic field and the acceleration of energetic particles, we have first to estimate the free magnetic energy available for such phenomena, which can be converted into kinetic and thermal energy. The free magnetic energy is the excess energy of a magnetic configuration compared to the minimum-energy state, which is a linear force-free field if the magnetic helicity of the configuration is conserved. We investigate the values of the free magnetic energy estimated from either the excess energy in extrapolated fields or the magnetic virial theorem. For four different active regions, we have reconstructed the nonlinear force-free field and the linear force-free field corresponding to the minimum-energy state. The free magnetic energies are then computed. From the energy budget and the observed magnetic activity in the active region, we conclude that the free energy above the minimum-energy state gives a better estimate and more insights into the flare process than the free energy above the potential field state.
Solving Regular Tree Grammar Based Constraints Yanhong A. Liu Ning Li Scott D. Stoller
Stoller, Scott
Solving Regular Tree Grammar Based Constraints Yanhong A. Liu Ning Li Scott D. Stoller July 2000 and is then simpli ed according to a set of simpli cation rules to produce the solution. Usually, the constraints
Haptic Rendering of Topological Constraints to Users Manipulating Serial Virtual Linkages
Constantinescu, Daniela
Haptic Rendering of Topological Constraints to Users Manipulating Serial Virtual Linkages Daniela-- This paper presents an approach for haptic rendering of topological constraints to users operating serial rendering. I. INTRODUCTION Haptic interaction with physically-motivated virtual en- vironments provides
Checking Design Constraints at Run-time Using OCL and AspectJ
Cheon, Yoonsik
Roach, and Cuauhtemoc Munoz TR #09-35 December 2009 Keywords: design constraints, runtime checking Design Constraints at Run-time Using OCL and AspectJ Yoonsik Cheon (1) , Carmen Avila (1) , Steve Roach
Grasso, Albert P. (Vernon, CT)
1986-01-01T23:59:59.000Z
A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.
Grasso, A.P.
1984-02-21T23:59:59.000Z
A liquid level detector for low pressure boilers. A boiler tank, from which vapor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.
Not Available
1982-01-01T23:59:59.000Z
Chapter I identifies possible technological, economic, and environmental constraints to geothermal resource development. Chapter II discusses constraints relative to outer continental shelf and geothermal resources. General leasing information for each resource is detailed. Chapter III summarizes the major studies relating to development constraints. 37 refs. (PSB)
A model for dynamic chance constraints in hydro power reservoir management
Römisch, Werner
A model for dynamic chance constraints in hydro power reservoir management L. Andrieu , R. Henrion In this paper, a model for (joint) dynamic chance constraints is proposed and ap- plied to an optimization for two and three stages. 1 Introduction A conventional optimization problem under chance constraints
A model of constraint solvers by chaotic iteration adapted to value withdrawal explanations
Lesaint, Willy
of a value from a domain". This notion of explanation is essential for the debugging of CSP programs. Indeed of constraint programming is to solve Constraint Satisfaction Problems (CSP) [16], that is to provide constraint to the CSP. In future work, we plan to extend our framework in order to fully take labeling
Constraints on the Higgs boson total width using H*(126) -> ZZ events
Roberto Covarelli
2014-05-16T23:59:59.000Z
Constraints are set on the Higgs boson decay width, Gamma_H, using off-shell production and decay to ZZ in the four-lepton (4l), or two-lepton-two-neutrino (2l2nu) final states. The analysis is based on the data collected in 2012 by the CMS experiment at the LHC, corresponding to an integrated luminosity L = 19.7 fb^{-1} at sqrt(s) = 8 TeV. A maximum-likelihood fit of invariant mass and kinematic discriminant distributions in the 4l case and of transverse mass or missing energy distributions in the 2l2nu case is performed. The result of it, combined with the 4l measurement near the resonance peak, leads to an upper limit on the Higgs boson width of Gamma_H < 4.2 x Gamma_H^SM at the 95% confidence level, assuming Gamma_H^SM = 4.15 MeV.
Julien Bel; Philippe Brax; Christian Marinoni; Patrick Valageas
2014-06-12T23:59:59.000Z
The clustering ratio $\\eta$, a large-scale structure observable originally devised to constrain the shape of the power spectrum of matter density fluctuations, is shown to provide a sensitive and model independent probe of the nature of gravity in the cosmological regime. We apply this analysis to $F(R)$ theories of gravity using the luminous red galaxy sample extracted from the Sloan Digital Sky Survey. We find that the absolute amplitude of deviations from GR, $f_{R_0 }$, is constrained to be smaller than $3 \\times 10^{-6}$ at the 1$\\sigma$ confidence level. This bound, improving by an order of magnitude on current constraints, makes cosmological probes of gravity competitive with Solar system tests.
First cosmological constraints on the Superfluid Chaplygin gas model
Lazkoz, Ruth; Salzano, Vincenzo
2012-01-01T23:59:59.000Z
In this work we set observational constraints of the Superfluid Chaplygin gas model, which gives a unified description of the dark sector of the Universe as a Bose-Einstein condensate (BEC) that behaves as dark energy (DE) while it is in the ground state and as dark matter (DM) when it is in the excited state. We first show and perform the various steps leading to a form of the equations suitable for the observational tests to be carried out. Then, by using a Markov Chain Monte Carlo (MCMC) code, we constrain the model with a sample of cosmology-independent long gamma-ray bursts (LGRBs) calibrated using their Type I Fundamental Plane, as well as the Union2.1 set and observational Hubble parameter data. In this analysis, using our cosmological constraints, we sketch the effective equation of state parameter and deceleration parameter, and we also obtain the redshift of the transition from deceleration to acceleration: $z_t$.
First cosmological constraints on the Superfluid Chaplygin gas model
Ruth Lazkoz; Ariadna Montiel; Vincenzo Salzano
2012-11-15T23:59:59.000Z
In this work we set observational constraints of the Superfluid Chaplygin gas model, which gives a unified description of the dark sector of the Universe as a Bose-Einstein condensate (BEC) that behaves as dark energy (DE) while it is in the ground state and as dark matter (DM) when it is in the excited state. We first show and perform the various steps leading to a form of the equations suitable for the observational tests to be carried out. Then, by using a Markov Chain Monte Carlo (MCMC) code, we constrain the model with a sample of cosmology-independent long gamma-ray bursts (LGRBs) calibrated using their Type I Fundamental Plane, as well as the Union2.1 set and observational Hubble parameter data. In this analysis, using our cosmological constraints, we sketch the effective equation of state parameter and deceleration parameter, and we also obtain the redshift of the transition from deceleration to acceleration: $z_t$.
Energy Constraints and $F(T,T_{G})$ Cosmology
Waheed, Saira
2015-01-01T23:59:59.000Z
The present paper is elaborated to discuss the energy condition bounds in a modified teleparallel gravity namely $F(T,T_{G})$, involving torsion invariant $T$ and contribution from a term $T_G$, the teleparallel equivalent of the Gauss-Bonnet term. For this purpose, we consider flat FRW universe with matter contents as perfect fluid. We formulate the SEC, NEC, WEC and DEC in terms of some cosmic parameters including Hubble, deceleration, jerk and snap parameters. By taking two interesting models for $F(T,T_{G})$ and some recent limits of these cosmic parameters, we explore the constraints on the free parameters present in both assumed models. We also discuss these constraints graphically in terms of cosmic time by taking power law cosmology into account.
Lorentz violation at high energy: concepts, phenomena and astrophysical constraints
Ted Jacobson; Stefano Liberati; David Mattingly
2005-06-11T23:59:59.000Z
We consider here the possibility of quantum gravity induced violation of Lorentz symmetry (LV). Even if suppressed by the inverse Planck mass such LV can be tested by current experiments and astrophysical observations. We review the effective field theory approach to describing LV, the issue of naturalness, and many phenomena characteristic of LV. We discuss some of the current observational bounds on LV, focusing mostly on those from high energy astrophysics in the QED sector at order E/M_Planck. In this context we present a number of new results which include the explicit computation of rates of the most relevant LV processes, the derivation of a new photon decay constraint, and modification of previous constraints taking proper account of the helicity dependence of the LV parameters implied by effective field theory.
Neutrino oscillation constraints on neutrinoless double beta decay
S. M. Bilenky; C. Giunti; C. W. Kim; M. Monteno
1997-11-20T23:59:59.000Z
We have studied the constraints imposed by the results of neutrino oscillation experiments on the effective Majorana mass || that characterizes the contribution of Majorana neutrino masses to the matrix element of neutrinoless double-beta decay. We have shown that in a general scheme with three Majorana neutrinos and a hierarchy of neutrino masses (which can be explained by the see-saw mechanism), the results of neutrino oscillation experiments imply rather strong constraints on the parameter ||. From the results of the first reactor long-baseline experiment CHOOZ and the Bugey experiment it follows that || | > 10^{-1} eV would be a signal for a non-hierarchical neutrino mass spectrum and/or non-standard mechanisms of lepton number violation.
Constraints from cosmic rays on non-systematic Lorentz violation
Sayandeb Basu; David Mattingly
2005-07-05T23:59:59.000Z
In this article we analyze the radiation loss from a high energy cosmic ray proton propagating in a spacetime with non-systematic Lorentz violation. From an effective field theory perspective we illuminate flaws in previous attempts that use threshold approaches to analyze this problem. We argue that in general such approaches are of rather limited use when dealing with non-systematic Lorentz violating scenarios. The main issues we raise are a) the limited applicability of threshold energy conservation rules when translation invariance is broken and b) the large amounts of proton particle production due to the time dependence of the fluctuations. Ignoring particle production, we derive a constraint on the magnitude of velocity fluctuation $|v_f|<10^{-6.5}$, much weaker than has been previously argued. However, we show that in fact particle production makes any such constraint completely unreliable.
Solar System Constraints on Gauss-Bonnet Mediated Dark Energy
Luca Amendola; Christos Charmousis; Stephen C. Davis
2007-10-02T23:59:59.000Z
Although the Gauss-Bonnet term is a topological invariant for general relativity, it couples naturally to a quintessence scalar field, modifying gravity at solar system scales. We determine the solar system constraints due to this term by evaluating the post-Newtonian metric for a distributional source. We find a mass dependent, 1/r^7 correction to the Newtonian potential, and also deviations from the Einstein gravity prediction for light-bending. We constrain the parameters of the theory using planetary orbits, the Cassini spacecraft data, and a laboratory test of Newton's law, always finding extremely tight bounds on the energy associated to the Gauss-Bonnet term. We discuss the relevance of these constraints to late-time cosmological acceleration.
Variability of the Caribbean Low-Level Jet and its relations Chunzai Wang
Wang, Chunzai
Variability of the Caribbean Low-Level Jet and its relations to climate Chunzai Wang Received: 11 Abstract A maximum of easterly zonal wind at 925 hPa in the Caribbean region is called the Caribbean Low), and a minimum of tropical cyclo- genesis in July in the Caribbean Sea. It is found that both the meridional
Solar system constraints on R$^n$ gravity
A. F. Zakharov; A. A. Nucita; F. De Paolis; G. Ingrosso
2006-11-02T23:59:59.000Z
Recently, gravitational microlensing has been investigated in the framework of the weak field limit of fourth order gravity theory. However, solar system data (i.e. planetary periods and light bending) can be used to put strong constraints on the parameters of this class of gravity theories. We find that these parameters must be very close to those corresponding to the Newtonian limit of the theory.
Solar System Constraints on Gauss-Bonnet Dark Energy
Stephen C. Davis
2007-08-15T23:59:59.000Z
Quadratic curvature Gauss-Bonnet gravity may be the solution to the dark energy problem, but a large coupling strength is required. This can lead to conflict with laboratory and planetary tests of Newton's law, as well as light bending. The corresponding constraints are derived. If applied directly to cosmological scales, the resulting bound on the density fraction is |Omega_GB| < 3.6 x 10^-32.
Dynamic storage of continuous products under volume constraints
Lewis, Harry Swift
1968-01-01T23:59:59.000Z
Products and Two Tanks with Production Fqual to Demand Case II - Two Products and Three Tanks with Production Equal to Demand Case III ? Two Products and N Tanks w' th Production Equal to Demand Case IV ? Two Products and Two Tanks with Production... Greater than Demand IV GEOMETRIC SOLUTIONS FOR SCHEDULING SHARED FACILITIES WITH INTERFACE CONSTPAINTS. General Constraints and Conditions Product Dominance. Tank Rel. ease Dominance Interpretation of Geometric Solutions. V. GENERAL SOLUTION...
An LP-Designed Algorithm for Constraint Satisfaction
Scott, Alexander Alexander
@watson.ibm.com Abstract. The class Max (r, 2)-CSP consists of constraint satisfaction problems with at most two r ) for binary-valued problems), making it the fastest for Max Cut, but tied for Max 2-Sat. Results The present O(r-valued variables per clause. For instances with n variables and m binary clauses, we present an O(r19m/100 )-time
Direct Detection Constraints on Dark Photon Dark Matter
Haipeng An; Maxim Pospelov; Josef Pradler; Adam Ritz
2014-12-29T23:59:59.000Z
Dark matter detectors built primarily to probe elastic scattering of WIMPs on nuclei are also precise probes of light, weakly coupled particles that may be absorbed by the detector material. In this paper, we derive constraints on the minimal model of dark matter comprised of long-lived vector states V (dark photons) in the 0.01-100 keV mass range. The absence of an ionization signal in direct detection experiments such as XENON10 and XENON100 places a very strong constraint on the dark photon mixing angle, down to $O(10^{-15})$, assuming that dark photons comprise the dominant fraction of dark matter. This sensitivity to dark photon dark matter exceeds the indirect bounds derived from stellar energy loss considerations over a significant fraction of the available mass range. We also revisit indirect constraints from $V\\to 3\\gamma$ decay and show that limits from modifications to the cosmological ionization history are comparable to the updated limits from the diffuse gamma-ray flux.
Cosmological constraints from the correlation function of galaxy clusters
James Robinson
2000-04-03T23:59:59.000Z
I compare various semi-analytic models for the bias of dark matter halos with halo clustering properties observed in recent numerical simulations. The best fitting model is one based on the collapse of ellipsoidal perturbations proposed by Sheth, Mo & Tormen (1999), which fits the halo correlation length to better than 8 per cent accuracy. Using this model, I confirm that the correlation length of clusters of a given separation depends primarily on the shape and amplitude of mass fluctuations in the universe, and is almost independent of other cosmological parameters. Current observational uncertainties make it difficult to draw robust conclusions, but for illustrative purposes I discuss the constraints on the mass power spectrum which are implied by recent analyses of the APM cluster sample. I also discuss the prospects for improving these constraints using future surveys such as the Sloan Digital Sky Survey. Finally, I show how these constraints can be combined with observations of the cluster number abundance to place strong limits on the matter density of the universe.
Correlation in fermion or boson systems as the minimum of entropy relative to all free states
Alex D. Gottlieb; Norbert J. Mauser
2014-03-29T23:59:59.000Z
In the context of many-fermion systems, "correlation" refers to the inadequacy of an independent-particle model. Using "free" states as archetypes of our independent-particle model, we have proposed a measure of correlation that we called "nonfreeness" [Int. J. Quant. Inf. 5, 815 (2007)]. The nonfreeness of a many-fermion state was defined to be its entropy relative to the unique free state with the same 1-matrix. In this article, we prove that the nonfreeness of a state is the minimum of its entropy relative to all free states. We also extend the definition of nonfreeness to many-boson states and discuss a couple of examples.
The secondary minimum in YY Her: Evidence for a tidally distorted giant
J. Mikolajewska; E. A. Kolotilov; S. Yu. Shugarov; B. F. Yudin
2002-06-23T23:59:59.000Z
We present and analyze quiescent UBVRI light curves of the classical symbiotic binary YY Her. We show that the secondary minimum, which is clearly visible only in the quiescent VRI light curves, is due to ellipsoidal variability of the red giant component. Our simple light curve analysis, by fitting of the Fourier cosine series, resulted in a self-consistent phenomenological model of YY Her, in which the periodic changes can be described by a combination of the ellipsoidal changes and a sinusoidal changes of the nebular continuum and line emission.
Solid low-level waste forecasting guide
Templeton, K.J.; Dirks, L.L.
1995-03-01T23:59:59.000Z
Guidance for forecasting solid low-level waste (LLW) on a site-wide basis is described in this document. Forecasting is defined as an approach for collecting information about future waste receipts. The forecasting approach discussed in this document is based solely on hanford`s experience within the last six years. Hanford`s forecasting technique is not a statistical forecast based upon past receipts. Due to waste generator mission changes, startup of new facilities, and waste generator uncertainties, statistical methods have proven to be inadequate for the site. It is recommended that an approach similar to Hanford`s annual forecasting strategy be implemented at each US Department of Energy (DOE) installation to ensure that forecast data are collected in a consistent manner across the DOE complex. Hanford`s forecasting strategy consists of a forecast cycle that can take 12 to 30 months to complete. The duration of the cycle depends on the number of LLW generators and staff experience; however, the duration has been reduced with each new cycle. Several uncertainties are associated with collecting data about future waste receipts. Volume, shipping schedule, and characterization data are often reported as estimates with some level of uncertainty. At Hanford, several methods have been implemented to capture the level of uncertainty. Collection of a maximum and minimum volume range has been implemented as well as questionnaires to assess the relative certainty in the requested data.
Meyen, Edward L.; Alley, Gordon R.; Scannell, Dale P.; Harnden, G. Mack; Miller, Kelly F.
1982-06-01T23:59:59.000Z
In this study, LD specialists, regular class teachers, and parents of LD students judged that the objectives of the Kansas Minimum Competency Specifications prescribed for nonhandicapped students were applicable to LD ...
McMillan, Marcia Donna
2011-08-08T23:59:59.000Z
Shale completions of the type which have been widely utilized since 2004. There is insufficient production history from real wells to determine an appropriate minimum terminal decline rate. In the absence of suitable analogs for the determination...
Kong, Liangliang
Anaerobic ammonia oxidation (anammox) as an important nitrogen loss pathway has been reported in marine oxygen minimum zones (OMZs), but the community composition and spatial distribution of anammox bacteria in the eastern ...
Hunter, Steven L. (Livermore, CA); Boro, Carl O. (Milpitas, CA); Farris, Alvis (late of Byron, CA)
2002-01-01T23:59:59.000Z
A tiltmeter device having a pair of orthogonally disposed tilt sensors that are levelable within an inner housing containing the sensors. An outer housing can be rotated to level at least one of the sensor pair while the inner housing can be rotated to level the other sensor of the pair. The sensors are typically rotated up to about plus or minus 100 degrees. The device is effective for measuring tilts in a wide range of angles of inclination of wells and can be employed to level a platform containing a third sensor.
Geller, Howard S.
1985-11-01T23:59:59.000Z
Refrigerator-freezers (R/Fs) and freezers (FRs) account for 16% of the electricity consumed in the residential sector of the Bonneville Power Administration (BPA) forecast region (Oregon, Washington, Idaho and Western Montana). After space and water heating, R/Fs are the largest residential electrical end-use. There is great potential for reducing electricity consumption in a cost-effective manner through the purchase and use of more energy-efficient R/Fs and FRs. For example, if every household in the BPA region had the best R/F model now mass-produced, the electricity savings would be about 5 billion kWh/yr, approximately the power supplied annually by 1000 MW of nuclear or coal-fired generating capacity. The Northwest Power Planning Council (NPPC) and BPA recognize the savings potential from efficient R/Fs and FRs as well as the barriers to their use. In the 1983 regional power plan, the Council directed BPA to develop and implement incentive and promotion programs for efficient appliances. The NPPC also called for the evaluation of minimum efficiency standards for appliances sold in the region. In response to this directive, the Office of Conservation in BPA funded an evaluation of both rebate incentive programs and minimum efficiency standards for R/Fs and FRs. The results are presented in this report.
Bi-level Optimization for Capacity Planning in Industrial Gas Markets
Grossmann, Ignacio E.
Bi-level Optimization for Capacity Planning in Industrial Gas Markets P. Garcia-Herreros, L. Zhang markets are dynamic: Â· Suppliers must anticipate demand growth Â· Most markets are served locally Capacity is incremental( t T, i I ) Demand satisfaction is constraint by capacities( t T, i I ) All markets
Letschert, Virginie; Desroches, Louis-Benoit; McNeil, Michael; Saheb, Yamina
2010-05-03T23:59:59.000Z
The US Department of Energy (US DOE) has placed lighting and appliance standards at a very high priority of the U.S. energy policy. However, the maximum energy savings and CO2 emissions reduction achievable via minimum efficiency performance standards (MEPS) has not yet been fully characterized. The Bottom Up Energy Analysis System (BUENAS), first developed in 2007, is a global, generic, and modular tool designed to provide policy makers with estimates of potential impacts resulting from MEPS for a variety of products, at the international and/or regional level. Using the BUENAS framework, we estimated potential national energy savings and CO2 emissions mitigation in the US residential sector that would result from the most aggressive policy foreseeable: standards effective in 2014 set at the current maximum technology (Max Tech) available on the market. This represents the most likely characterization of what can be maximally achieved through MEPS in the US. The authors rely on the latest Technical Support Documents and Analytical Tools published by the U.S. Department of Energy as a source to determine appliance stock turnover and projected efficiency scenarios of what would occur in the absence of policy. In our analysis, national impacts are determined for the following end uses: lighting, television, refrigerator-freezers, central air conditioning, room air conditioning, residential furnaces, and water heating. The analyzed end uses cover approximately 65percent of site energy consumption in the residential sector (50percent of the electricity consumption and 80percent of the natural gas and LPG consumption). This paper uses this BUENAS methodology to calculate that energy savings from Max Tech for the U.S. residential sector products covered in this paper will reach an 18percent reduction in electricity demand compared to the base case and 11percent in Natural Gas and LPG consumption by 2030 The methodology results in reductions in CO2 emissions of a similar magnitude.
Constraints on particle dark matter from cosmic-ray antiprotons
N. Fornengo; L. Maccione; A. Vittino
2015-01-30T23:59:59.000Z
Cosmic-ray antiprotons represent an important channel for dark matter indirect-detection studies. Current measurements of the antiproton flux at the top of the atmosphere and theoretical determinations of the secondary antiproton production in the Galaxy are in good agreement, with no manifest deviation which could point to an exotic contribution in this channel. Therefore, antiprotons can be used as a powerful tool for constraining particle dark matter properties. By using the spectrum of PAMELA data from 50 MV to 180 GV in rigidity, we derive bounds on the dark matter annihilation cross section (or decay rate, for decaying dark matter) for the whole spectrum of dark matter annihilation (decay) channels and under different hypotheses of cosmic-rays transport in the Galaxy and in the heliosphere. For typical models of galactic propagation, the constraints are significantly strong, setting a lower bound on the dark matter mass of a "thermal" relic at about 50-90 GeV for hadronic annihilation channels. These bounds are enhanced to about 150 GeV on the dark matter mass, when large cosmic-rays confinement volumes in the Galaxy are considered, and are reduced to 4-5 GeV for annihilation to light quarks (no bound for heavy-quark production) when the confinement volume is small. Bounds for dark matter lighter than few tens of GeV are due to the low energy part of the PAMELA spectrum, an energy region where solar modulation is relevant: to this aim, we have implemented a detailed solution of the transport equation in the heliosphere, which allowed us not only to extend bounds to light dark matter, but also to determine the uncertainty on the constraints arising from solar modulation modeling. Finally, we estimate the impact of soon-to-come AMS-02 data on the antiproton constraints.
CMB constraint on non-Gaussianity in isocurvature perturbations
Hikage, Chiaki [Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602 (Japan); Kawasaki, Masahiro [Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582 (Japan); Sekiguchi, Toyokazu [Department of Physics and Astrophysics, Nagoya University, Nagoya 464-8602 (Japan); Takahashi, Tomo, E-mail: hikage@kmi.nagoya-u.ac.jp, E-mail: kawasaki@icrr.u-tokyo.ac.jp, E-mail: toyokazu.sekiguchi@nagoya-u.jp, E-mail: tomot@cc.saga-u.ac.jp [Department of Physics, Saga University, Saga 840-8502 (Japan)
2013-07-01T23:59:59.000Z
We study the CMB constraints on non-Gaussianity in CDM isocurvature perturbations. Non-Gaussian isocurvature perturbations can be produced in various models at the very early stage of the Universe. Since the isocurvature perturbations little affect the structure formation at late times, CMB is the best probe of isocurvature non-Gaussianity at least in the near future. In this paper, we focus on non-Gaussian curvature and isocurvature perturbations of the local-type, which are uncorrelated and in the form ? = ?{sub G}+(3/5)f{sub NL}(?{sub G}{sup 2}?(?{sub G}{sup 2})) and S = S{sub G}+f{sub NL}{sup (ISO)}(S{sub G}?(S{sub G}{sup 2})), and constrain the non-linearity parameter of isocurvature perturbations, f{sub NL}{sup (ISO)}, as well as the curvature one f{sub NL}. For this purpose, we employ several state-of-art techniques for the analysis of CMB data and simulation. Assuming that isocurvature perturbations are subdominant, we apply our method to the WMAP 7-year data of temperature anisotropy and obtain constraints on a combination ?{sup 2}f{sub NL}{sup (ISO)}, where ? is the ratio of the power spectrum of isocurvature perturbations to that of the adiabatic ones. When the adiabatic perturbations are assumed to be Gaussian, we obtained a constraint ?{sup 2}f{sub NL}{sup (ISO)} = 40±66 assuming the power spectrum of isocurvature perturbations is scale-invariant. When we assume that the adiabatic perturbations can also be non-Gaussian, we obtain f{sub NL} = 38±24 and ?{sup 2}f{sub NL}{sup (ISO)} = ?8±72. We also discuss implications of our results for the axion CDM isocurvature model.
Projected Constraints on Lorentz-Violating Gravity with Gravitational Waves
Devin Hansen; Nicolas Yunes; Kent Yagi
2014-12-12T23:59:59.000Z
Gravitational waves are excellent tools to probe the foundations of General Relativity in the strongly dynamical and non-linear regime. One such foundation is Lorentz symmetry, which can be broken in the gravitational sector by the existence of a preferred time direction, and thus, a preferred frame at each spacetime point. This leads to a modification in the orbital decay rate of binary systems, and also in the generation and chirping of their associated gravitational waves. We here study whether waves emitted in the late, quasi-circular inspiral of non-spinning, neutron star binaries can place competitive constraints on two proxies of gravitational Lorentz-violation: Einstein-\\AE{}ther theory and khronometric gravity. We model the waves in the small-coupling (or decoupling) limit and in the post-Newtonian approximation, by perturbatively solving the field equations in small deformations from General Relativity and in the small-velocity/weak-gravity approximation. We assume a gravitational wave consistent with General Relativity has been detected with second- and third-generation, ground-based detectors, and with the proposed space-based mission, DECIGO, with and without coincident electromagnetic counterparts. Without a counterpart, a detection consistent with General Relativity of neutron star binaries can only place competitive constraints on gravitational Lorentz violation when using future, third-generation or space-based instruments. On the other hand, a single counterpart is enough to place constraints that are 10 orders of magnitude more stringent than current binary pulsar bounds, even when using second-generation detectors. This is because Lorentz violation forces the group velocity of gravitational waves to be different from that of light, and this difference can be very accurately constrained with coincident observations.
Quiet planting in the locked constraints satisfaction problems
Zdeborova, Lenka [Los Alamos National Laboratory; Krzakala, Florent [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
We study the planted ensemble of locked constraint satisfaction problems. We describe the connection between the random and planted ensembles. The use of the cavity method is combined with arguments from reconstruction on trees and first and second moment considerations; in particular the connection with the reconstruction on trees appears to be crucial. Our main result is the location of the hard region in the planted ensemble, thus providing hard satisfiable benchmarks. In a part of that hard region instances have with high probability a single satisfying assignment.
Early universe constraints on time variation of fundamental constants
Landau, Susana J.; Mosquera, Mercedes E.; Scoccola, Claudia G.; Vucetich, Hector [Departamento de Fisica, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria-Pabellon 1, 1428 Buenos Aires (Argentina); Facultad de Ciencias Astronomicas y Geofisicas. Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata (Argentina); Facultad de Ciencias Astronomicas y Geofisicas. Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata (Argentina); and Instituto de Astrofisica, Paseo del Bosque S/N 1900 La Plata (Argentina); Facultad de Ciencias Astronomicas y Geofisicas. Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata (Argentina)
2008-10-15T23:59:59.000Z
We study the time variation of fundamental constants in the early Universe. Using data from primordial light nuclei abundances, cosmic microwave background, and the 2dFGRS power spectrum, we put constraints on the time variation of the fine structure constant {alpha} and the Higgs vacuum expectation value
Coupling constant constraints in a nonminimally coupled phantom cosmology
Szydlowski, Marek; Hrycyna, Orest; Kurek, Aleksandra [Astronomical Observatory, Jagiellonian University, Orla 171, 30-244 Cracow (Poland) and Mark Kac Complex Systems Research Centre, Jagiellonian University, Reymonta 4, 30-059 Cracow (Poland); Department of Theoretical Physics, Faculty of Philosophy, John Paul II Catholic University of Lublin, Al. Raclawickie 14, 20-950 Lublin (Poland); Astronomical Observatory, Jagiellonian University, Orla 171, 30-244 Cracow (Poland)
2008-01-15T23:59:59.000Z
In the paper we investigate observational constraints on coupling to gravity constant parameter {xi} using distant supernovae SNIa data, baryon oscillation peak (BOP), the cosmic microwave background radiation (CMBR) shift parameter, and the H(z) data set. We estimate the value of this parameter to constrain the extended quintessence models with nonminimally coupled to gravity phantom scalar field. The combined analysis of observational data favors a value of {xi} which lies in close neighborhood of the conformal coupling. While our estimations are model dependent they give rise to an indirect bound on the equivalence principle.
Coordinated Multi-Agent Motion Planning Under Realistic Constraints
Maithripala, Diyogu Hennadige Asanka
2009-05-15T23:59:59.000Z
false range. The problem essentially involves all the extended lines of sight, from the radars to the UAVs engaging them, intersecting at a common point and tracing a path in space, which is a constraint on the system configuration space. The radar... involves all the extended lines of sight, from the radars to the UAVs engaging them, intersecting at a common point and tracing a path in space. By introducing the appropriate time delays to the radar signals, this path being traced is exactly what...
Multi-wavelength constraints on the inflationary consistency relation
Meerburg, P Daniel; Hadzhiyska, Boryana; Meyers, Joel
2015-01-01T23:59:59.000Z
We present the first attempt to use a combination of CMB, LIGO, and PPTA data to constrain both the tilt and the running of primordial tensor power spectrum through constraints on the gravitational wave energy density generated in the early universe. Combining measurements at different cosmological scales highlights how complementary data can be used to test the predictions of early universe models including the inflationary consistency relation. Current data prefers a slightly positive tilt ($n_t = 0.13^{+0.54}_{-0.75}$) and a negative running ($n_{t, {\\rm run}} assumptions regarding the UV cutoff ($k_{\\...
Current observational constraints on holographic dark energy model
L. N. Granda; W. Cardona; A. Oliveros
2009-10-03T23:59:59.000Z
We consider the cosmological constraints on the holographic dark energy model by using the data set available from the type Ia supernovae (SNIa), CMB and BAO observations. The constrained parameters are critical to determine the quintessence or quintom character the model. The SNIa and joint SNIa+CMB+BAO analysis give the best-fit results for $\\beta$ with priors on $\\Omega_{m0}$ and $\\omega_0$. Using montecarlo we obtained the best-fit values for $\\beta$, $\\Omega_{m0}$ and $\\omega_0$. The statefinder and $Om$ diagnosis have been used to characterize the model over other DE models.
Yun-He Li; Xin Zhang
2014-04-20T23:59:59.000Z
Dark energy might interact with cold dark matter in a direct, nongravitational way. However, the usual interacting dark energy models (with constant $w$) suffer from some catastrophic difficulties. For example, the $Q\\propto\\rho_{\\rm c}$ model leads to an early-time large-scale instability, and the $Q\\propto\\rho_{\\rm de}$ model gives rise to the future unphysical result for cold dark matter density (in the case of a positive coupling). In order to overcome these fatal flaws, we propose in this paper an interacting dark energy model (with constant $w$) in which the interaction term is carefully designed to realize that $Q\\propto\\rho_{\\rm de}$ at the early times and $Q\\propto\\rho_{\\rm c}$ in the future, simultaneously solving the early-time superhorizon instability and future unphysical $\\rho_{\\rm c}$ problems. The concrete form of the interaction term in this model is $Q=3\\beta H \\frac{\\rho_{\\rm{de}}\\rho_{\\rm{c}}}{\\rho_{\\rm{de}}+\\rho_{\\rm{c}}}$, where $\\beta$ is the dimensionless coupling constant. We show that this model is actually equivalent to the decomposed new generalized Chaplygin gas (NGCG) model, with the relation $\\beta=-\\alpha w$. We calculate the cosmological perturbations in this model in a gauge-invariant way and show that the cosmological perturbations are stable during the whole expansion history provided that $\\beta>0$. Furthermore, we use the Planck data in conjunction with other astrophysical data to place stringent constraints on this model (with eight parameters), and we find that indeed $\\beta>0$ is supported by the joint constraint at more than 1$\\sigma$ level. The excellent theoretical features and the support from observations all indicate that the decomposed NGCG model deserves more attention and further investigation.
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Pablant, N. A. [PPPL; Bell, R. E. [PPPL; Bitter, M. [PPPL; Delgado-Aparicio, L. [PPPL; Hill, K. W. [PPPL; Lazerson, S. [PPPL; Morita, S. [National Institute for Fusion Science, Toki 509-5292, Gifu, Japan
2014-11-01T23:59:59.000Z
Accurate tomographic inversion is important for diagnostic systems on stellarators and tokamaks which rely on measurements of line integrated emission spectra. A tomographic inversion technique based on spline optimization with enforcement of constraints is described that can produce unique and physically relevant inversions even in situations with noisy or incomplete input data. This inversion technique is routinely used in the analysis of data from the x-ray imaging crystal spectrometer (XICS) installed at LHD. The XICS diagnostic records a 1D image of line integrated emission spectra from impurities in the plasma. Through the use of Doppler spectroscopy and tomographic inversion, XICS can provide pro#12;file measurements of the local emissivity, temperature and plasma flow. Tomographic inversion requires the assumption that these measured quantities are flux surface functions, and that a known plasma equilibrium reconstruction is available. In the case of low signal levels or partial spatial coverage of the plasma cross-section, standard inversion techniques utilizing matrix inversion and linear-regularization often cannot produce unique and physically relevant solutions. The addition of physical constraints, such as parameter ranges, derivative directions, and boundary conditions, allow for unique solutions to be reliably found. The constrained inversion technique described here utilizes a modifi#12;ed Levenberg-Marquardt optimization scheme, which introduces a condition avoidance mechanism by selective reduction of search directions. The constrained inversion technique also allows for the addition of more complicated parameter dependencies, for example geometrical dependence of the emissivity due to asymmetries in the plasma density arising from fast rotation. The accuracy of this constrained inversion technique is discussed, with an emphasis on its applicability to systems with limited plasma coverage.
Improved freezing level retrieval
Hong, Sungwook
2002-01-01T23:59:59.000Z
TRMM Microwave Imager(TMI)-based passive microwave retrieval techniques result in biased estimates of the freezing level and rainfall over the east Pacific in the Inter Tropical Convergence Zone (ITCZ). Passive microwave rainfall estimates...
Possible Observation of Nuclear Reactor Neutrinos Near the Oscillation Absolute Minimum
C. Bouchiat
2003-04-27T23:59:59.000Z
After a summary of the basic three neutrino oscillation formalism we review briefly our present empirical knowledge of the oscillation parameters and conclude that the 2-neutrinos model is adequate to describe the survival probability of the electronic neutrino P(nue->nue). Then we proceed to the evaluation of P(nue->nue) relative to the antineutrinos emitted by the nuclear power stations presently in operation along the the Rhone valley. We assume that a detector has been installed in a existing cavity located under the Mont Ventoux at a depth equivalent to 1500 m of water. We show that such an experiment would provide the opportunity to observe neutrinos near the oscillation absolute minimum. We end by a rough estimate of the counting rate.
The effects of R/X ratios on power system minimum loss
Denison, John Scott
1949-01-01T23:59:59.000Z
. 8 ]0 19 ' B+]40?5 Approx. 1/2 X17 Angle (degrees) I R TOTAL I X I Z I R IX IZ PZR CZ, NT LOSS ' 2?5 5 ' 0 -7 ' 5 -10 -15 2. 88 5 43 2 ' 09 2. 00 2. 54 3 ' 43 6. 69 0 ' 91 2 ~ 51 O. o3 0. 97 1. 96 3 ' 17 7 ?14 2 ~ 98 5. 99... 2. 18 2?22 3 ' 20 4. 67 9. 76 148. 0 278. 0 107. 1 103. 0 130 5 176. 0 343 ' o 144?4 139. 0 398 ' 0 278. 5 700, 5 101. 3 154 ' 0 103 ' 2 311 ~ 5 14. 9 ~ 0 504?0 216?5 1033. 0 455. 0 kt minimum point, ths system I R loss is 7. 3...
Optimization of Operating Parameters for Minimum Mechanical Specific Energy in Drilling
Hamrick, Todd
2011-05-25T23:59:59.000Z
Efficiency in drilling is measured by Mechanical Specific Energy (MSE). MSE is the measure of the amount of energy input required to remove a unit volume of rock, expressed in units of energy input divided by volume removed. It can be expressed mathematically in terms of controllable parameters; Weight on Bit, Torque, Rate of Penetration, and RPM. It is well documented that minimizing MSE by optimizing controllable factors results in maximum Rate of Penetration. Current methods for computing MSE make it possible to minimize MSE in the field only through a trial-and-error process. This work makes it possible to compute the optimum drilling parameters that result in minimum MSE. The parameters that have been traditionally used to compute MSE are interdependent. Mathematical relationships between the parameters were established, and the conventional MSE equation was rewritten in terms of a single parameter, Weight on Bit, establishing a form that can be minimized mathematically. Once the optimum Weight on Bit was determined, the interdependent relationship that Weight on Bit has with Torque and Penetration per Revolution was used to determine optimum values for those parameters for a given drilling situation. The improved method was validated through laboratory experimentation and analysis of published data. Two rock types were subjected to four treatments each, and drilled in a controlled laboratory environment. The method was applied in each case, and the optimum parameters for minimum MSE were computed. The method demonstrated an accurate means to determine optimum drilling parameters of Weight on Bit, Torque, and Penetration per Revolution. A unique application of micro-cracking is also presented, which demonstrates that rock failure ahead of the bit is related to axial force more than to rotation speed.
Minimum energy states of the cylindrical plasma pinch in single-fluid and Hall magnetohydrodynamics
Khalzov, I. V.; Schnack, D. D.; Mirnov, V. V. [Center for Magnetic Self-Organization, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706 (United States); Ebrahimi, F. [University of New Hampshire, 8 College Road, Durham, New Hampshire 03824 (United States)
2012-01-15T23:59:59.000Z
Relaxed states of a plasma column are found analytically in single-fluid and Hall magnetohydrodynamics (MHD). We perform complete minimization of the energy with constraints imposed by invariants inherent in the corresponding models. It is shown that the relaxed state in Hall MHD is a force-free magnetic field with uniform axial flow and/or rigid azimuthal rotation. In contrast, the relaxed states in single-fluid MHD are more complex due to the coupling between velocity and magnetic field. Cylindrically and helically symmetric relaxed states are considered for both models. Helical states may be time dependent and analogous to helical waves, propagating on a cylindrically symmetric background. Application of our results to reversed-field pinches (RFP) is discussed. The radial profile of the parallel momentum predicted by the single-fluid MHD relaxation theory is shown to be in reasonable agreement with experimental observation from the Madison symmetric torus RFP experiment.
Model-independent constraints on dark energy and modified gravity with the SKA
Zhao, Gong-Bo; Maartens, Roy; Santos, Mario; Raccanelli, Alvise
2015-01-01T23:59:59.000Z
Employing a nonparametric approach of the principal component analysis (PCA), we forecast the future constraint on the equation of state $w(z)$ of dark energy, and on the effective Newton constant $\\mu(k,z)$, which parameterise the effect of modified gravity, using the planned SKA HI galaxy survey. Combining with the simulated data of Planck and Dark Energy Survey (DES), we find that SKA Phase 1 (SKA1) and SKA Phase 2 (SKA2) can well constrain $3$ and $5$ eigenmodes of $w(z)$ respectively. The errors of the best measured modes can be reduced to 0.04 and 0.023 for SKA1 and SKA2 respectively, making it possible to probe dark energy dynamics. On the other hand, SKA1 and SKA2 can constrain $7$ and $20$ eigenmodes of $\\mu(k,z)$ respectively within 10\\% sensitivity level. Furthermore, 2 and 7 modes can be constrained within sub percent level using SKA1 and SKA2 respectively. This is a significant improvement compared to the combined datasets without SKA.
Covariant phase space, constraints, gauge and the Peierls formula
Igor Khavkine
2014-02-07T23:59:59.000Z
It is well known that both the symplectic structure and the Poisson brackets of classical field theory can be constructed directly from the Lagrangian in a covariant way, without passing through the non-covariant canonical Hamiltonian formalism. This is true even in the presence of constraints and gauge symmetries. These constructions go under the names of the covariant phase space formalism and the Peierls bracket. We review both of them, paying more careful attention, than usual, to the precise mathematical hypotheses that they require, illustrating them in examples. Also an extensive historical overview of the development of these constructions is provided. The novel aspect of our presentation is a significant expansion and generalization of an elegant and quite recent argument by Forger & Romero showing the equivalence between the resulting symplectic and Poisson structures without passing through the canonical Hamiltonian formalism as an intermediary. We generalize it to cover theories with constraints and gauge symmetries and formulate precise sufficient conditions under which the argument holds. These conditions include a local condition on the equations of motion that we call hyperbolizability, and some global conditions of cohomological nature. The details of our presentation may shed some light on subtle questions related to the Poisson structure of gauge theories and their quantization.
Application of the ''reactivity constraint approach'' to automatic reactor control
Bernard, J.A.; Henry, A.F.; Lanning, D.D.
1988-02-01T23:59:59.000Z
The ''reactivity constraint approach'' is described and demonstrated to be an effective and reliable means for the automatic control of power in nuclear reactors. This approach functions by restricting the effect of the delayed neutron populations to that which can be balanced by an induced change in the prompt population. This is done by limiting the net reactivity to the amount that can be offset by reversing the direction of motion of the automated control mechanism. The necessary reactivity constraints are obtained from the dynamic period equation, which gives the instantaneous reactor period as a function of the reactivity and the rate of change of reactivity. The derivation of this equation is described with emphasis on the recently obtained ''alternate'' formulation. Following a discussion of the behavior of each term of this alternate equation as a function of reactivity, its use in the design and operation of a nonlinear, closed-loop, digital controller for reactor power is in the design and operation of a nonlinear, closed-loop, digital controller for reactor power is described. Details of the initial experimental trials of the resulting controller are given.
Low level tank waste disposal study
Mullally, J.A.
1994-09-29T23:59:59.000Z
Westinghouse Hanford Company (WHC) contracted a team consisting of Los Alamos Technical Associates (LATA), British Nuclear Fuel Laboratories (BNFL), Southwest Research Institute (SwRI), and TRW through the Tank Waste Remediation System (TWRS) Technical Support Contract to conduct a study on several areas concerning vitrification and disposal of low-level-waste (LLW). The purpose of the study was to investigate how several parameters could be specified to achieve full compliance with regulations. The most restrictive regulation governing this disposal activity is the National Primary Drinking Water Act which sets the limits of exposure to 4 mrem per year for a person drinking two liters of ground water daily. To fully comply, this constraint would be met independently of the passage of time. In addition, another key factor in the investigation was the capability to retrieve the disposed waste during the first 50 years as specified in Department of Energy (DOE) Order 5820.2A. The objective of the project was to develop a strategy for effective long-term disposal of the low-level waste at the Hanford site.
Constraints on the density dependence of the symmetry energy from heavy ion collisions
Tsang, M B; Coupland, D; Danielewicz, P; Famiano, F; Hodges, R; Kilburn, M; Lu, F; Lynch, W G; Winkelbauer, J; Youngs, M; Zhang, YingXun
2011-01-01T23:59:59.000Z
Constraints on the Equation of State for symmetric matter (equal neutron and proton numbers) have been extracted from energetic collisions of heavy ions over a range of energies. Collisions of neutron-deficient and neutron-rich heavy ions now provide initial constraints on the EoS of neutron-rich matter at sub-saturation densities from isospin diffusions and neutron proton ratios. This article reviews the experimental constraints on the density dependence of Symmetry Energy at sub-saturation density.
Constraints on the density dependence of the symmetry energy from heavy ion collisions
M. B. Tsang; Z. Chajecki; D. Coupland; P. Danielewicz; F. Famiano; R. Hodges; M. Kilburn; F. Lu; W. G. Lynch; J. Winkelbauer; M. Youngs; YingXun Zhang
2011-01-19T23:59:59.000Z
Constraints on the Equation of State for symmetric matter (equal neutron and proton numbers) have been extracted from energetic collisions of heavy ions over a range of energies. Collisions of neutron-deficient and neutron-rich heavy ions now provide initial constraints on the EoS of neutron-rich matter at sub-saturation densities from isospin diffusions and neutron proton ratios. This article reviews the experimental constraints on the density dependence of Symmetry Energy at sub-saturation density.
Constraints on dark energy models from radial baryon acoustic scale measurements
Lado Samushia; Bharat Ratra
2009-08-20T23:59:59.000Z
We use the radial baryon acoustic oscillation (BAO) measurements of Gaztanaga et al. (2008) to constrain parameters of dark energy models. These constraints are comparable with constraints from other "non-radial" BAO data. The radial BAO data are consistent with the time-independent cosmological constant model but do not rule out time-varying dark energy. When we combine radial BAO and the Kowalski et al. (2008) Union type Ia supernova data we get very tight constraints on dark energy.
Ultrasonic liquid level detector
Kotz, Dennis M. (North Augusta, SC); Hinz, William R. (Augusta, GA)
2010-09-28T23:59:59.000Z
An ultrasonic liquid level detector for use within a shielded container, the detector being tubular in shape with a chamber at its lower end into which liquid from in the container may enter and exit, the chamber having an ultrasonic transmitter and receiver in its top wall and a reflector plate or target as its bottom wall whereby when liquid fills the chamber a complete medium is then present through which an ultrasonic wave may be transmitted and reflected from the target thus signaling that the liquid is at chamber level.
Primordial Helium Abundance from CMB: a constraint from recent observations and a forecast
Kazuhide Ichikawa; Toyokazu Sekiguchi; Tomo Takahashi
2008-08-18T23:59:59.000Z
We studied a constraint on the primordial helium abundance Y_p from current and future observations of CMB. Using the currently available data from WMAP, ACBAR, CBI and BOOMERANG, we obtained the constraint as Y_p = 0.25^{+0.10}_{-0.07} at 68% C.L. We also provide a forecast for the Planck experiment using the Markov chain Monte Carlo approach. In addition to forecasting the constraint on Y_p, we investigate how assumptions for Y_p affect constraints on the other cosmological parameters.
E-Print Network 3.0 - active kinematic constraint Sample Search...
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The 1st Joint International Conference on Multibody System Dynamics May 2527, 2010, Lappeenranta, Finland Summary: the kinematic constraints) and depend thus on all the (passive...
S. F. Hassan; Rachel A. Rosen
2011-11-08T23:59:59.000Z
In massive gravity and in bimetric theories of gravity, two constraints are needed to eliminate the two phase-space degrees of freedom of the Boulware-Deser ghost. For recently proposed non-linear theories, a Hamiltonian constraint has been shown to exist and an associated secondary constraint was argued to arise as well. In this paper we explicitly demonstrate the existence of the secondary constraint. Thus the Boulware-Deser ghost is completely absent from these non-linear massive gravity theories and from the corresponding bimetric theories.
Environmental Constraints on Hydropower: An Ex Post Benefit-Cost Analysis of Dam
Kotchen, Matthew J.
Environmental Constraints on Hydropower: An Ex Post Benefit-Cost Analysis of Dam Relicensing Consumers Protection Act (1986), which instructs federal regulators to ``balance'' hydropower
E-Print Network 3.0 - additional external constraints Sample...
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Computer Technologies and Information Sciences 2 A Two-Constraint Approach to Risky CyberSecurity Summary: experiment behavior Assured constrained external behavior Malware ...
Mancarella, P; Sadri, F; Toni, F; Endriss, U
2009-01-01T23:59:59.000Z
We present the CIFF proof procedure for abductive logic programming with constraints, and we prove its correctness. CIFF is an extension of the IFF proof procedure for abductive logic programming, relaxing the original restrictions over variable quantification (allowedness conditions) and incorporating a constraint solver to deal with numerical constraints as in constraint logic programming. Finally, we describe the CIFF system, comparing it with state of the art abductive systems and answer set solvers and showing how to use it to program some applications. (To appear in Theory and Practice of Logic Programming - TPLP).
E-Print Network 3.0 - atmospheric 14co2 constraints Sample Search...
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Liu Summary: with an emphasis on macroscopic constraint of atmospheric vertical heat transport. This work focuses on exploring... MACROSCOPIC VIEW ON VERTICAL ATMOSPHERIC...
ENRAF gauge reference level calculations
Huber, J.H., Fluor Daniel Hanford
1997-02-06T23:59:59.000Z
This document describes the method for calculating reference levels for Enraf Series 854 Level Detectors as installed in the tank farms. The reference level calculation for each installed level gauge is contained herein.
O. Goldoni; M. F. A. da Silva; R. Chan; G. Pinheiro
2014-12-16T23:59:59.000Z
In this paper, we have studied nonstationary radiative spherically symmetric spacetime, in general covariant theory ($U(1)$ extension) of {the} Ho\\v{r}ava-Lifshitz gravity with the minimum coupling, in the post-newtonian approximation (PPN), without the projectability condition and in the infrared limit. The Newtonian prepotential $\\varphi$ was assumed null. We have shown that there is not the analogue of the Vaidya's solution in the Ho\\v{r}ava-Lifshitz Theory (HLT) with the minimum coupling, as we know in the General Relativity Theory (GRT).
Ba Dinh, Khuong, E-mail: kdinh@swin.edu.au; Vu Le, Hoang; Hannaford, Peter; Van Dao, Lap [ARC Centre of Excellence for Coherent X-Ray Science and Centre for Quantum and Optical Science, Swinburne University of Technology, Melbourne, Vic 3122 (Australia)
2014-05-28T23:59:59.000Z
We experimentally study the observation of the Cooper minimum in a semi-infinite argon-filled gas cell using two-color laser fields at wavelengths of 1400?nm and 800?nm. The experimental results show that the additional 800?nm field can change the macroscopic phase-matching condition through change of the atomic dipole phase associated with the electron in the continuum state and that this approach can be used to control the appearance of the Cooper minimum in the high-order harmonic spectrum in order to study the electronic structure of atoms and molecules.
Seldin, Jonathan P.
- Canadian and International Environmental Management Management 4640 - Cross-Cultural Work Study FourThe Bachelor of Management degree in International Management is a minimum of 40 courses in length in Year One. Admission to Management programs is competitive and is based on academic achievement prior
Planck Satellite Constraints on Pseudo-Nambu--Goldstone Boson Quintessence
Smer-Barreto, Vanessa
2015-01-01T23:59:59.000Z
The Pseudo-Nambu-Goldstone Boson (PNGB) potential, defined through the amplitude $M^4$ and width $f$ of its characteristic potential $V(\\phi) = M^4[1 + \\cos(\\phi~ /~ f)]$, is one of the best-suited models for the study of thawing quintessence. We analyse its present observational constraints by direct numerical solution of the scalar field equation of motion. Observational bounds are obtained using data from Union 2.1 for Supernovae, cosmic microwave background temperature anisotropies from Planck plus WMAP polarization data, and baryon acoustic oscillations data. We find the parameter ranges for which PNGB quintessence remains a viable theory for dark energy. We compare the direct potential analysis and use of an approximate equation-of-state parameterization for thawing theories; this comparison highlights a strong prior dependence to the outcome coming from the choice of modelling methodology, which current data are not sufficient to override.
Divide and concur: A general approach to constraint satisfaction
Gravel, Simon
2008-01-01T23:59:59.000Z
Many difficult computational problems involve the simultaneous satisfaction of multiple constraints which are individually easy to satisfy. Such problems occur in diffractive imaging, protein folding, constrained optimization (e.g., spin glasses), and satisfiability testing. We present a simple geometric framework to express and solve such problems and apply it to two benchmarks. In the first application (3SAT, a boolean satisfaction problem), the resulting method exhibits similar performance scaling as a leading context-specific algorithm (walksat). In the second application (sphere packing), the method allowed us to find improved solutions to some old and well-studied optimization problems. Based upon its simplicity and observed efficiency, we argue that this framework provides a competitive alternative to stochastic methods such as simulated annealing.
Neutron star equations of state with optical potential constraint
Antic, Sofija
2015-01-01T23:59:59.000Z
Nuclear matter and neutron stars are studied in the framework of an extended relativistic mean-field (RMF) model with higher-order derivative and density dependent couplings of nucleons to the meson fields. The derivative couplings lead to an energy dependence of the scalar and vector self-energies of the nucleons. It can be adjusted to be consistent with experimental results for the optical potential in nuclear matter. Several parametrisations, which give identical predictions for the saturation properties of nuclear matter, are presented for different forms of the derivative coupling functions. The stellar structure of spherical, non-rotating stars is calculated for these new equations of state (EoS). A substantial softening of the EoS and a reduction of the maximum mass of neutron stars is found if the optical potential constraint is satisfied.
Neutron star equations of state with optical potential constraint
Sofija Antic; Stefan Typel
2015-01-29T23:59:59.000Z
Nuclear matter and neutron stars are studied in the framework of an extended relativistic mean-field (RMF) model with higher-order derivative and density dependent couplings of nucleons to the meson fields. The derivative couplings lead to an energy dependence of the scalar and vector self-energies of the nucleons. It can be adjusted to be consistent with experimental results for the optical potential in nuclear matter. Several parametrisations, which give identical predictions for the saturation properties of nuclear matter, are presented for different forms of the derivative coupling functions. The stellar structure of spherical, non-rotating stars is calculated for these new equations of state (EoS). A substantial softening of the EoS and a reduction of the maximum mass of neutron stars is found if the optical potential constraint is satisfied.
Constraints, limits and extensions for nuclear energy functionals
G. Colo'
2009-02-21T23:59:59.000Z
In the present contribution, we discuss the behavior of Skyrme forces when they are employed to study both neutron stars and giant resonance states in 208Pb within the fully self-consistent Random Phase Approximation (RPA). We point out that clear correlations exist between the results for the isoscalar monopole and isovector dipole resonances (ISGMR and IVGDR), and definite quantities which characterize the equation of state (EOS) of uniform matter. We propose that the RPA results or, to some extent, the mentioned EOS parameters, are used as constraints when a force is fitted. This suggestion can be valid also when the fit of a more general energy density functional is envisaged. We use our considerations to select a limited number of Skyrme forces (10) out of a large sample of 78 interactions.
Irreversible Thermodynamics of the Universe: Constraints from Planck Data
Subhajit Saha; Atreyee Biswas; Subenoy Chakraborty
2014-04-04T23:59:59.000Z
The present work deals with irreversible Universal thermodynamics. The homogenous and isotropic flat model of the universe is chosen as open thermodynamical system and non-equilibrium thermodynamics comes into picture due to the mechanism of particle creation. For simplicity, entropy flow is considered only due to heat conduction. Further, due to Maxwell-Cattaneo modified Fourier law for non-equilibrium phenomenon, the temperature satisfies damped wave equation instead of heat conduction equation. Validity of generalized second law of thermodynamics (GSLT) has been investigated for Universe bounded by apparent or event horizon with cosmic substrutum as perfect fluid with constant or variable equation of state or interacting dark species. Finally, we have used three Planck data sets to constrain the thermal conductivity \\lambda and the coupling parameter b^2. These constraints must be satisfied in order for GSLT to hold for Universe bounded by apparent or event horizons.
Dark radiation from particle decay: cosmological constraints and opportunities
Hasenkamp, Jasper; Kersten, Jörn, E-mail: Jasper.Hasenkamp@desy.de, E-mail: Joern.Kersten@desy.de [II. Institute for Theoretical Physics, University of Hamburg, 22761 Hamburg (Germany)
2013-08-01T23:59:59.000Z
We study particle decay as the origin of dark radiation. After elaborating general properties and useful parametrisations we provide model-independent and easy-to-use constraints from nucleosynthesis, the cosmic microwave background and structure formation. Bounds on branching ratios and mass hierarchies depend in a unique way on the time of decay. We demonstrate their power to exclude well-motivated scenarios taking the example of the lightest ordinary sparticle decaying into the gravitino. We point out signatures and opportunities in cosmological observations and structure formation. For example, if there are two dark decay modes, dark radiation and the observed dark matter with adjustable free-streaming can originate from the same decaying particle, solving small-scale problems of structure formation. Hot dark matter mimicking a neutrino mass scale as deduced from cosmological observations can arise and possibly be distinguished after a discovery. Our results can be used as a guideline for model building.
Dark radiation from particle decay: cosmological constraints and opportunities
Jasper Hasenkamp; Jörn Kersten
2014-02-13T23:59:59.000Z
We study particle decay as the origin of dark radiation. After elaborating general properties and useful parametrisations we provide model-independent and easy-to-use constraints from nucleosynthesis, the cosmic microwave background and structure formation. Bounds on branching ratios and mass hierarchies depend in a unique way on the time of decay. We demonstrate their power to exclude well-motivated scenarios taking the example of the lightest ordinary sparticle decaying into the gravitino. We point out signatures and opportunities in cosmological observations and structure formation. For example, if there are two dark decay modes, dark radiation and the observed dark matter with adjustable free-streaming can originate from the same decaying particle, solving small-scale problems of structure formation. Hot dark matter mimicking a neutrino mass scale as deduced from cosmological observations can arise and possibly be distinguished after a discovery. Our results can be used as a guideline for model building.
Observational Constraints on the Topology (Global Geometry) of the Universe
B. F. Roukema
2002-01-07T23:59:59.000Z
The Universe is a physical object. Physical objects have shapes and sizes. General relativity is insufficient to describe the global shape and size of the Universe: the Hilbert-Einstein equations only treat limiting quantities towards an arbitrary point. Empirical work on measuring the shape and size of the Universe (formally: the ``3-manifold of the spatial hypersurface at constant cosmological time'', and, e.g. the ``injectivity diameter'' respectively) has progressed significantly in the late 1980's and the 1990's, using observational catalogues of galaxy clusters, of quasars and of the microwave background, though the analyses are still hindered by simplifying (and often observationally unsupported) assumptions. A review of the different observational strategies and claimed constraints was presented at the meeting.
New Constraint on Open Cold-Dark-Matter Models
Ali Kinkhabwala; Marc Kamionkowski
1999-05-03T23:59:59.000Z
We calculate the large-angle cross-correlation between the cosmic-microwave-background (CMB) temperature and the x-ray-background (XRB) intensity expected in an open Universe with cold dark matter (CDM) and a nearly scale-invariant spectrum of adiabatic density perturbations. Results are presented as a function of the nonrelativistic-matter density $\\Omega_0$ (in units of the critical density) and the x-ray bias $b_x$ (evaluated at a redshift $z\\simeq1$ in evolving-bias models) for both an open Universe and a flat cosmological-constant Universe. Recent experimental upper limits to the amplitude of this cross-correlation provide a new constraint to the $\\Omega_0$-$b_x$ parameter space that open-CDM models (and the open-inflation models that produce them) must satisfy.
LHC constraints on gauge boson couplings to dark matter
Crivellin, Andreas; Hibbs, Anthony
2015-01-01T23:59:59.000Z
Collider searches for energetic particles recoiling against missing transverse energy allow to place strong bounds on the interactions between dark matter (DM) and standard model particles. In this article we update and extend LHC constraints on effective dimension-7 operators involving DM and electroweak gauge bosons. A concise comparison of the sensitivity of the mono-photon, mono-W, mono-Z, mono-W/Z, invisible Higgs-boson decays in the vector boson fusion mode and the mono-jet channel is presented. Depending on the parameter choices, either the mono-photon or the mono-jet data provide the most stringent bounds at the moment. We furthermore explore the potential of improving the current 8 TeV limits at 14 TeV. Future strategies capable of disentangling the effects of the different effective operators involving electroweak gauge bosons are discussed as well.
Neural Modeling and Control of Diesel Engine with Pollution Constraints
Ouladsine, Mustapha; Dovifaaz, Xavier; 10.1007/s10846-005-3806-y
2009-01-01T23:59:59.000Z
The paper describes a neural approach for modelling and control of a turbocharged Diesel engine. A neural model, whose structure is mainly based on some physical equations describing the engine behaviour, is built for the rotation speed and the exhaust gas opacity. The model is composed of three interconnected neural submodels, each of them constituting a nonlinear multi-input single-output error model. The structural identi?cation and the parameter estimation from data gathered on a real engine are described. The neural direct model is then used to determine a neural controller of the engine, in a specialized training scheme minimising a multivariable criterion. Simulations show the effect of the pollution constraint weighting on a trajectory tracking of the engine speed. Neural networks, which are ?exible and parsimonious nonlinear black-box models, with universal approximation capabilities, can accurately describe or control complex nonlinear systems, with little a priori theoretical knowledge. The present...
Solar System Constraints on f(G) Dark Energy
Stephen C. Davis
2008-01-30T23:59:59.000Z
Corrections to solar system gravity are derived for f(G) gravity theories, in which a function of the Gauss-Bonnet curvature term is added to the gravitational action. Their effects on Newton's law, as felt by the planets, and on the frequency shift of signals from the Cassini spacecraft, are both determined. Despite the fact that the Gauss-Bonnet term is quadratic in curvature, the resulting constraints are substantial. It is shown that they practically rule out f(G) as a natural explanation for the late-time acceleration of the universe. Possible exceptions are when f(G) reduces to something very close to a cosmological constant, or if the form of the function f is exceptionally fine-tuned.
Hawley, Alyse K.; Brewer, Heather M.; Norbeck, Angela D.; Pasa-Tolic, Ljiljana; Hallam, Steven J.
2014-08-05T23:59:59.000Z
Oxygen minimum zones (OMZs) are intrinsic water column features arising from respiratory oxygen demand during organic matter degradation in stratified marine waters. Currently OMZs are expanding due to global climate change. This expansion alters marine ecosystem function and the productivity of fisheries due to habitat compression and changes in biogeochemical cycling leading to fixed nitrogen loss and greenhouse gas production. Here we use metaproteomics to chart spatial and temporal patterns of gene expression along defined redox gradients in a seasonally anoxic fjord, Saanich Inlet to better understand microbial community responses to OMZ expansion. The expression of metabolic pathway components for nitrification, anaerobic ammonium oxidation (anammox), denitrification and inorganic carbon fixation predominantly co-varied with abundance and distribution patterns of Thaumarchaeota, Nitrospira, Planctomycetes and SUP05/ARCTIC96BD-19 Gammaproteobacteria. Within these groups, pathways mediating inorganic carbon fixation and nitrogen and sulfur transformations were differentially expressed across the redoxcline. Nitrification and inorganic carbon fixation pathways affiliated with Thaumarchaeota dominated dysoxic waters and denitrification, sulfur-oxidation and inorganic carbon fixation pathways affiliated with SUP05 dominated suboxic and anoxic waters. Nitrite-oxidation and anammox pathways affiliated with Nitrospina and Planctomycetes respectively, also exhibited redox partitioning between dysoxic and suboxic waters. The differential expression of these pathways under changing water column redox conditions has quantitative implications for coupled biogeochemical cycling linking different modes of inorganic carbon fixation with distributed nitrogen and sulfur-based energy metabolism extensible to coastal and open ocean OMZs.
On the 27-day Variations of Cosmic Ray Intensity in Recent Solar Minimum 23/24
Modzelewska, R
2015-01-01T23:59:59.000Z
We have studied the 27-day variations and their harmonics of the galactic cosmic ray (GCR) intensity, solar wind velocity, and interplanetary magnetic field (IMF) components in the recent prolonged solar minimum 23 24. The time evolution of the quasi-periodicity in these parameters connected with the Suns rotation reveals that their synodic period is stable and is aprox 26-27 days. This means that the changes in the solar wind speed and IMF are related to the Suns near equatorial regions in considering the differential rotation of the Sun. However, the solar wind parameters observed near the Earths orbit provide only the conditions in the limited local vicinity of the equatorial region in the heliosphere (within in latitude). We also demonstrate that the observed period of the GCR intensity connected with the Suns rotation increased up to aprox 33-36 days in 2009. This means that the process driving the 27-day variations of the GCR intensity takes place not only in the limited local surroundings of the equato...
Can minimum-bias distributions on transverse energy test hadron production models?
Thomas A. Trainor
2014-02-17T23:59:59.000Z
A recent study reports measurements of transverse-energy $E_t$ distributions at mid-rapidity for several high-energy nuclear collision systems. The $E_t$ data are analyzed in the context of constituent-quark (CQ) participants estimated with a Glauber-model simulation. The study concludes that systematic variations of hadron and $E_t$ yields previously interpreted in terms of a two-component soft+hard model (TCM) of hadron production including a dijet (hard) contribution are actually the result of CQ participant trends with only soft production. It is claimed that deviations from linear scaling with the number of nucleon participants of hadron yields vs A-A centrality do not actually arise from dijet production as previously assumed. In the present study we examine the new $E_t$ data in the context of the TCM and compare those results with previous differential spectrum and minimum-bias correlation analysis. We present substantial evidence supporting a significant dijet contribution to all high-energy nuclear collisions consistent with the TCM and conclude that the $E_t$ data, given their systematic uncertainties, fail to support claimed CQ model interpretations.
P. M. Ferreira; R. Santos; A. Barroso
2004-10-13T23:59:59.000Z
We show that in two Higgs doublet models at tree-level the potential minimum preserving electric charge and CP symmetries, when it exists, is the global one. Furthermore, we derived a very simple condition, involving only the coefficients of the quartic terms of the potential, that guarantees spontaneous CP breaking.
Global fits of the cMSSM and NUHM including the LHC Higgs discovery and new XENON100 constraints
Strege, C.; Trotta, R. [Astrophysics Group, and Imperial Centre for Inference and Cosmology, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ (United Kingdom); Bertone, G. [GRAPPA Institute, University of Amsterdam, Science Park 904, 1090 GL Amsterdam (Netherlands); Feroz, F. [Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Fornasa, M. [School of Physics and Astronomy, University of Nottingham, University Park NG7 2RD (United Kingdom); Austri, R. Ruiz de, E-mail: charlotte.strege09@imperial.ac.uk, E-mail: gf.bertone@gmail.com, E-mail: f.feroz@mrao.cam.ac.uk, E-mail: fornasam@gmail.com, E-mail: rruiz@ific.uv.es, E-mail: r.trotta@imperial.ac.uk [Instituto de Física Corpuscular, IFIC-UV/CSIC, Valencia (Spain)
2013-04-01T23:59:59.000Z
We present global fits of the constrained Minimal Supersymmetric Standard Model (cMSSM) and the Non-Universal Higgs Model (NUHM), including the most recent CMS constraint on the Higgs boson mass, 5.8 fb{sup ?1} integrated luminosity null Supersymmetry searches by ATLAS, the new LHCb measurement of BR( B-bar {sub s} ? ?{sup +}?{sup ?}) and the 7-year WMAP dark matter relic abundance determination. We include the latest dark matter constraints from the XENON100 experiment, marginalising over astrophysical and particle physics uncertainties. We present Bayesian posterior and profile likelihood maps of the highest resolution available today, obtained from up to 350M points. We find that the new constraint on the Higgs boson mass has a dramatic impact, ruling out large regions of previously favoured cMSSM and NUHM parameter space. In the cMSSM, light sparticles and predominantly gaugino-like dark matter with a mass of a few hundred GeV are favoured. The NUHM exhibits a strong preference for heavier sparticle masses and a Higgsino-like neutralino with a mass of 1 TeV. The future ton-scale XENON1T direct detection experiment will probe large portions of the currently favoured cMSSM and NUHM parameter space. The LHC operating at 14 TeV collision energy will explore the favoured regions in the cMSSM, while most of the regions favoured in the NUHM will remain inaccessible. Our best-fit points achieve a satisfactory quality-of-fit, with p-values ranging from 0.21 to 0.35, so that none of the two models studied can be presently excluded at any meaningful significance level.
A Minimum Free Energy Reaction Path for the E2 Reaction between Fluoro Ethane and a Fluoride Ion
Nielsen, Steven O.
A Minimum Free Energy Reaction Path for the E2 Reaction between Fluoro Ethane and a Fluoride Ion, such as the mechanism and the free-energy profile, remains an important challenge not only for enzyme catalysis1 of the reaction free-energy profile is very cumbersome with constrained molecular dynamics (MD) and umbrella
Speech Enhancement of Spectral Magnitude Bin Trajectories using Gaussian Mixture-Model based mean-square error es- timators have been applied to speech enhancement in the tem- poral, transform (e estimator for 8 kHz telephone-quality speech. Index Terms: Speech enhancement, minimum mean-square er- ror
Johnson, Michael T.
Distributed multichannel speech enhancement with minimum mean-square error short-time spectral Keywords: Acoustic arrays Speech enhancement Amplitude estimation Phase estimation Parameter estimation a b on the development and implementation of speech enhancement algorithms. Whereas the current state-of-the-art methods
Map of Erosion Risk (C2)3 Vegetation Indices and Map of Minimum Forested Area4 5&
are required forest areas for Vietnam Erosion Risk Map Cover types C1 Natural Forests >1.7 Plantation forest.2 (ESRI, 2008), to generate a map of required protective forest area for Vietnam. (3) (4) (5Results Map of Erosion Risk (C2)3 Vegetation Indices and Map of Minimum Forested Area4 5& · Map
Pal, Chris
FORWARD-BACKWARD USING MINIMUM DIVERGENCE BEAMS FOR FAST TRAINING OF CONDITIONAL RANDOM FIELDS Chris Pal, however, training can be expensive, because it often requires many iterations of forward-backward. Beam-backward, standard beam heuristics can be danger- ous, as they can make training unstable. We introduce sparse
Levin, Lisa
Oxygen and organic matter thresholds for benthic faunal activity on the Pakistan margin oxygen increased animal activity associated with increasing bottom-water oxygen concentration. We examined faunal community responses to oxygen and organic matter gradients across the lower oxygen minimum zone (OMZ
Aalberts, Daniel P.
An Association of Independent Blue Cross and Blue Shield Plans This health plan meets Minimum, as part of the Massachusetts Health Care Reform Law. HMO Blue New EnglandSM Summary of Benefits Williams College #12;Your Care Your Primary Care Provider. When you enroll in HMO Blue New England, you must choose
On Termination of Constraint Logic Programs Livio Colussi 1, Elena Marchiori 2, Massimo Marchiori 1
Marchiori, Elena
On Termination of Constraint Logic Programs Livio Colussi 1, Elena Marchiori 2, Massimo Marchiori 1 introduces a necessary and sufficient condition for termination of constraint logic programs. The method programs. Then termination is proven using a technique inspired by the seminal approach of Floyd
Paris-Sud XI, UniversitÃ© de
Optimal transition from coal to gas and renewable power under capacity constraints and adjustment existing coal power plants to gas and renewable power under a carbon budget. It solves a model of polluting, exhaustible resources with capacity constraints and adjustment costs (to build coal, gas, and renewable power