National Library of Energy BETA

Sample records for mechanics classical mechanics

  1. Fractional Classical Mechanics

    E-Print Network [OSTI]

    Nick Laskin

    2013-02-03

    Fractional classical mechanics has been introduced and developed as a classical counterpart of the fractional quantum mechanics. Lagrange, Hamilton and Hamilton-Jacobi frameworks have been implemented for the fractional classical mechanics. The Lagrangian of fractional classical mechanics has been introduced, and equation of motion has been obtained. Fractional oscillator model has been launched and solved in 1D case. A new equation for the period of oscillations of fractional classical oscillator has been found. The interplay between the energy dependency of the period of classical oscillations and the non-equidistant distribution of the energy levels for fractional quantum oscillator has been discussed. We discuss as well, the relationships between new equations of fractional classical mechanics and the well-known fundamental equations of classical mechanics.

  2. Mecanica Clasica (Classical Mechanics)

    E-Print Network [OSTI]

    Rosu, H C

    1999-01-01

    First Internet undergraduate course on Classical Mechanics in Spanish (Castellano). This is about 80% of the material I covered during the January-June 1999 semester at IFUG in the Mexican city of Leon. English and Romanian versions are in (slow) progress and hopefully will be arXived. For a similar course on Quantum Mechanics, see physics/9808031

  3. Invariants in Supersymmetric Classical Mechanics

    E-Print Network [OSTI]

    A. Alonso Izquierdo; M. A. Gonzalez Leon; J. Mateos Guilarte

    2000-04-07

    The bosonic second invariant of SuperLiouville models in supersymmetric classical mechanics is described.

  4. Course Syllabus PHYS 331 Advanced Classical Mechanics

    E-Print Network [OSTI]

    Vollmayr-Lee, Ben

    Course Syllabus PHYS 331 ­ Advanced Classical Mechanics Fall 2011 Instructor: Ben Vollmayr-Lee, Olin 168, ben.vollmayr-lee@bucknell.edu, x73106 Textbook: John Taylor, Classical Mechanics Office Hours://www.eg.bucknell.edu/bvollmay/phys331 Course Description Classical mechanics is where it all started. Newton demonstrated that the same

  5. Classical Mechanics (Prof. P. L. Read)

    E-Print Network [OSTI]

    Read, Peter L.

    Classical Mechanics (Prof. P. L. Read) Lecture 1 Photograph © Andrew Dunn, 5 November 2004. #12;What is Classical Mechanics? · .. rational mechanics will be the science of motion resulting from any Mechanics? · System of mathematical physics developed since the time of Galileo, Newton & Kepler · Concerned

  6. QUANTUM CHAOS, CLASSICAL RANDOMNESS, AND BOHMIAN MECHANICS

    E-Print Network [OSTI]

    Goldstein, Sheldon

    QUANTUM CHAOS, CLASSICAL RANDOMNESS, AND BOHMIAN MECHANICS Detlef DË? urr* ,+ , Sheldon Goldstein of quantum theory, Bohmian mechanics, in which ``quantum chaos'' also arises solely from the dynamical law. Moreover, this occurs in a manner far simpler than in the classical case. KEY WORDS: Quantum chaos; quantum

  7. Statistical mechanics based on fractional classical and quantum mechanics

    SciTech Connect (OSTI)

    Korichi, Z.; Meftah, M. T.

    2014-03-15

    The purpose of this work is to study some problems in statistical mechanics based on the fractional classical and quantum mechanics. At first stage we have presented the thermodynamical properties of the classical ideal gas and the system of N classical oscillators. In both cases, the Hamiltonian contains fractional exponents of the phase space (position and momentum). At the second stage, in the context of the fractional quantum mechanics, we have calculated the thermodynamical properties for the black body radiation, studied the Bose-Einstein statistics with the related problem of the condensation and the Fermi-Dirac statistics.

  8. Classical and Quantum Mechanics via Lie algebras

    E-Print Network [OSTI]

    Arnold Neumaier; Dennis Westra

    2011-04-14

    The goal of this book is to present classical mechanics, quantum mechanics, and statistical mechanics in an almost completely algebraic setting, thereby introducing mathematicians, physicists, and engineers to the ideas relating classical and quantum mechanics with Lie algebras and Lie groups. The book emphasizes the closeness of classical and quantum mechanics, and the material is selected in a way to make this closeness as apparent as possible. Much of the material covered here is not part of standard textbook treatments of classical or quantum mechanics (or is only superficially treated there). For physics students who want to get a broader view of the subject, this book may therefore serve as a useful complement to standard treatments of quantum mechanics. Almost without exception, this book is about precise concepts and exact results in classical mechanics, quantum mechanics, and statistical mechanics. The structural properties of mechanics are discussed independent of computational techniques for obtaining quantitatively correct numbers from the assumptions made. The standard approximation machinery for calculating from first principles explicit thermodynamic properties of materials, or explicit cross sections for high energy experiments can be found in many textbooks and is not repeated here.

  9. Towards the topological quantization of classical mechanics

    E-Print Network [OSTI]

    Francisco Nettel; Hernando Quevedo; Moices Rodriguez

    2008-01-16

    We consider the method of topological quantization for conservative systems with a finite number of degrees of freedom. Maupertuis' formalism for classical mechanics provides an appropriate scenario which permit us to adapt the method of topological quantization, originally formulated for gravitational field configurations. We show that any conservative system in classical mechanics can be associated with a principal fiber bundle. As an application of topological quantization we derive expressions for the topological spectra of some simple mechanical systems and show that they reproduce the discrete behavior of the corresponding canonical spectra.

  10. Classical Coordination Mechanisms in the Chemical Model

    E-Print Network [OSTI]

    Fradet, Pascal

    great souvenir! Abstract Originally, the chemical model of computation has been proposed as a sim- pleClassical Coordination Mechanisms in the Chemical Model J.-P. Ban^atre P. Fradet Y. Radenac-Pierre Ban^atre) had with Gilles on topics related with programming in general and chemical programming

  11. Statistical mechanics of Yang-Mills classical mechanics

    SciTech Connect (OSTI)

    Bannur, Vishnu M. [Department of Physics, University of Calicut, Kerala-673 635 (India)

    2005-08-01

    Statistical mechanics (SM) of Yang-Mills classical mechanics is studied by using a toy model that resembles chaotic quartic oscillators. This nonlinear system attains the thermodynamic equilibrium not by collisions, which is generally assumed in SM, but by chaotic dynamics. This is a new mechanism of thermalization that may be relevent to the quark-gluon plasma (QGP) formation in relativistic heavy-ion collisions because the interactions governing QGP involve quantum chromodynamics (QCD), which is a Yang-Mills theory [SU(3)]. The thermalization time is estimated from the Lyapunov exponent. The Lyapunov exponent is evaluated using the recently developed monodromy matrix method. We also discuss the physical meaning of thermalization and SM in this system of few degrees in terms of chromo-electric and chromomagnetic fields. One of the consequence of thermalization, such as equipartition of energy and dynamical temperature, is also numerically verified.

  12. A Quantum Approach to Classical Statistical Mechanics

    E-Print Network [OSTI]

    Rolando D. Somma; Cristian D. Batista; Gerardo Ortiz

    2006-10-11

    We present a new approach to study the thermodynamic properties of $d$-dimensional classical systems by reducing the problem to the computation of ground state properties of a $d$-dimensional quantum model. This classical-to-quantum mapping allows us to deal with standard optimization methods, such as simulated and quantum annealing, on an equal basis. Consequently, we extend the quantum annealing method to simulate classical systems at finite temperatures. Using the adiabatic theorem of quantum mechanics, we derive the rates to assure convergence to the optimal thermodynamic state. For simulated and quantum annealing, we obtain the asymptotic rates of $T(t) \\approx (p N) /(k_B \\log t)$ and $\\gamma(t) \\approx (Nt)^{-\\bar{c}/N}$, for the temperature and magnetic field, respectively. Other annealing strategies, as well as their potential speed-up, are also discussed.

  13. Kinematics of trajectories in classical mechanics

    E-Print Network [OSTI]

    Rajibul Shaikh; Sayan Kar; Anirvan DasGupta

    2014-05-21

    In this paper, we show how the study of kinematics of a family of trajectories of a classical mechanical system may be unified within the framework of analysis of geodesic flows in Riemannian geometry and Relativity. After setting up the general formalism, we explore it through studies on various one and two dimensional systems. Quantities like expansion, shear and rotation (ESR), which are more familiar to the relativist, now re-appear while studying such families of trajectories in configuration space, in very simple mechanical systems. The convergence/divergence of a family of trajectories during the course of time evolution, the shear and twist of the area enclosing the family, and the focusing/defocusing of the trajectories within a finite time are investigated analytically for these systems. The understanding of the configuration space developed through such investigations is elaborated upon, and possible future avenues are pointed out.

  14. CLASSICAL MECHANICS: THE THREE-BODY PROBLEM ZI CHONG KAO

    E-Print Network [OSTI]

    May, J. Peter

    CLASSICAL MECHANICS: THE THREE-BODY PROBLEM ZI CHONG KAO Abstract. The Three-Body Problem is one of the oldest unsolved problems of classical mechanics. It arose as a natural extension of the Two-Body Prob of numerous techniques in classical mechan- ics as well as dynamical systems. Understanding the Three

  15. MATHEMATICS 428/609D Mathematical Classical Mechanics

    E-Print Network [OSTI]

    Fournier, John J.F.

    MATHEMATICS 428/609D Mathematical Classical Mechanics This course is intended to complement physics department classical mechanics courses in the sense that the physical background will be developed experience with rigorous mathematics (like Math 320 and 321) and with classical mechanics (like Physics 206

  16. Computational Mechanism Design The classic mechanism design literature largely ignores computational considerations. It

    E-Print Network [OSTI]

    Chen, Yiling

    Chapter 3 Computational Mechanism Design The classic mechanism design literature largely ignores of computational mechanism design. Our goal is to use a market-based method, such as an auction, to compute' local problems Wel96 . The game-theoretic considera- tions of mechanism design were secondary

  17. Computational Mechanism Design The classic mechanism design literature largely ignores computational considerations. It

    E-Print Network [OSTI]

    Chen, Yiling

    Chapter 3 Computational Mechanism Design The classic mechanism design literature largely ignores­as­computation'' view of computational mechanism design. Our goal is to use a market­based method, such as an auction­ tions of mechanism design were secondary to computational considerations. In recent years there has been

  18. Classic Mechanism Design Mechanism design is the subfield of microeconomics and game theory that considers how

    E-Print Network [OSTI]

    Chen, Yiling

    Chapter 2 Classic Mechanism Design Mechanism design is the sub­field of microeconomics and game­theoretic approach to mechanism design, and presents important possibility and impossibility results of computational mechanism design, and also surveys the economic literature on lim­ ited communication and agent

  19. The classical mechanics of autonomous microscopic engines

    E-Print Network [OSTI]

    Lukas Gilz; Eike P. Thesing; James R. Anglin

    2015-09-08

    Even microscopic engines have hitherto been defined to require macroscopic elements such as heat reservoirs, but here we observe that what makes engines useful is energy transfer across a large ratio of dynamical time scales ("downconversion"), and that small, closed dynamical systems which could perform steady downconversion ("Hamiltonian daemons") would fulfill the practical requirements of autonomous microscopic engines. We show that such daemons are possible, and obey mechanical constraints comparable to, but different from, the laws of thermodynamics.

  20. Physics 430, Classical Mechanics Exam 2,2010 Nov 09

    E-Print Network [OSTI]

    Gary, Dale E.

    E,*-dt7rno + gr=49' y(Q,-('f [# si^[,",+)+ o-ces&uP)J -1- 6 N"'l6 #12;Physics430,ClassicalMechanics Exam2Physics 430, Classical Mechanics Exam 2,2010 Nov 09 - l Name 5o I wt t 6h Instructions:No books,notes,or "cheatsheet"allowed. You may usea calculator,but no otherelectronicdevicesduring the exam. Pleasetum your cell

  1. Background Independent Quantum Mechanics, Classical Geometric Forms and Geometric Quantum Mechanics-I

    E-Print Network [OSTI]

    Aalok Pandya

    2008-09-08

    The geometry of the symplectic structures and Fubini-Study metric is discussed. Discussion in the paper addresses geometry of Quantum Mechanics in the classical phase space. Also, geometry of Quantum Mechanics in the projective Hilbert space has been discussed for the chosen Quantum states. Since the theory of classical gravity is basically geometric in nature and Quantum Mechanics is in no way devoid of geometry, the explorations pertaining to more and more geometry in Quantum Mechanics could prove to be valuable for larger objectives such as understanding of gravity.

  2. The Born Rule in Quantum and Classical Mechanics

    E-Print Network [OSTI]

    Paul Brumer; Jiangbin Gong

    2006-04-24

    Considerable effort has been devoted to deriving the Born rule (e.g. that $|\\psi(x)|^2 dx$ is the probability of finding a system, described by $\\psi$, between $x$ and $x + dx$) in quantum mechanics. Here we show that the Born rule is not solely quantum mechanical; rather, it arises naturally in the Hilbert space formulation of {\\it classical} mechanics as well. These results provide new insights into the nature of the Born rule, and impact on its understanding in the framework of quantum mechanics.

  3. Background Independent Quantum Mechanics, Classical Geometric Forms and Geometric Quantum Mechanics-II

    E-Print Network [OSTI]

    Aalok Pandya

    2009-01-19

    The geometry of Quantum Mechanics in the context of uncertainty and complementarity, and probability is explored. We extend the discussion of geometry of uncertainty relations in wider perspective. Also, we discuss the geometry of probability in Quantum Mechanics and its interpretations. We give yet another interpretation to the notion of Faraday lines and loops as the locus of probability flow. Also, the possibilities of visualization of spectra of area operators by means of classical geometric forms and conventional Quantum Mechanics are explored.

  4. Quantum Mechanics and Discrete Time from "Timeless" Classical Dynamics

    E-Print Network [OSTI]

    H. -T. Elze

    2003-07-03

    We study classical Hamiltonian systems in which the intrinsic proper time evolution parameter is related through a probability distribution to the physical time, which is assumed to be discrete. - This is motivated by the ``timeless'' reparametrization invariant model of a relativistic particle with two compactified extradimensions. In this example, discrete physical time is constructed based on quasi-local observables. - Generally, employing the path-integral formulation of classical mechanics developed by Gozzi et al., we show that these deterministic classical systems can be naturally described as unitary quantum mechanical models. The emergent quantum Hamiltonian is derived from the underlying classical one. It is closely related to the Liouville operator. We demonstrate in several examples the necessity of regularization, in order to arrive at quantum models with bounded spectrum and stable groundstate.

  5. How Einstein's quantum hypothesis requires a departure from classical mechanics

    E-Print Network [OSTI]

    Gabriele Carcassi

    2009-02-16

    The aim of this work is to show how Einstein's quantum hypothesis leads immediately and necessarily to a departure from classical mechanics. First we note that the classical description and predictions are in terms of idealized measurements that are exact, instantaneous, non-perturbative, independent of each other and process agnostic. If we assume we cannot arbitrarily reduce the strength of a signal, measurements are ultimately perturbative to some degree. We show how a physical description in which the best measurement conceivable, i.e. the ideal measurement, perturbs the system leads to all the concepts present in quantum mechanics including conjugate variables, probabilistic predictions and measurements connected to symmetries.

  6. Classical and quantum-mechanical phase space distributions

    E-Print Network [OSTI]

    Thomas Kiesel

    2013-06-21

    We examine the notion of nonclassicality in terms of quasiprobability distributions. In particular, we do not only ask if a specific quasiprobability can be interpreted as a classical probability density, but require that characteristic features of classical electrodynamics are resembled. We show that the only quasiprobabilities which correctly describe the superposition principle of classical electromagnetic fields are the $s$-parameterized quasiprobabilities. Furthermore, the Glauber-Sudarshan P function is the only quantum-mechanical quasiprobability which is transformed at a classical attenuator in the same way as a classical probability distribution. This result strengthens the definition of nonclassicality in terms of the P function, in contrast to possible definitions in terms of other quasiprobabilities.

  7. PLANCK'S FORMULA IN CLASSICAL MECHANICS Andrea CARATI, Luigi GALGANI

    E-Print Network [OSTI]

    .e. by considering processes involving continuous variations of energy. A particular effort in this direction), the expected energy distribution is apparently frozen about the initial one, with the addition of a ``thermal of classical mechanics. We prove that the expected energy distribution of the oscillators obeys Planck

  8. Classic Mechanism Design Mechanism design is the sub-eld of microeconomics and game theory that considers how

    E-Print Network [OSTI]

    Chen, Yiling

    Chapter 2 Classic Mechanism Design Mechanism design is the sub- eld of microeconomics and game-theoretic approach to mechanism design, and presents important possibility and impossibilityresults in the literature-rationality in mechanism design. The challenge in computational mechanism design is to design mechanisms that are both

  9. Twisting all the way: From classical mechanics to quantum fields

    SciTech Connect (OSTI)

    Aschieri, Paolo

    2008-01-15

    We discuss the effects that a noncommutative geometry induced by a Drinfeld twist has on physical theories. We systematically deform all products and symmetries of the theory. We discuss noncommutative classical mechanics, in particular its deformed Poisson bracket and hence time evolution and symmetries. The twisting is then extended to classical fields, and then to the main interest of this work: quantum fields. This leads to a geometric formulation of quantization on noncommutative space-time, i.e., we establish a noncommutative correspondence principle from *-Poisson brackets to * commutators. In particular commutation relations among creation and annihilation operators are deduced.

  10. Uncertainty and information in classical mechanics formulation. Common ground for thermodynamics and quantum mechanics

    E-Print Network [OSTI]

    Adrian Faigon

    2007-11-01

    Mechanics can be founded on a principle relating the uncertainty delta-q in the trajectory of an observable particle to its motion relative to the observer. From this principle, p.delta-q=const., p being the q-conjugated momentum, mechanical laws are derived and the meaning of the Lagrangian and Hamiltonian functions are discussed. The connection between the presented principle and Hamilton's Least Action Principle is examined. Wave mechanics and Schrodinger equation appear without additional assumptions by choosing the representation for delta-q in the case the motion is not trajectory describable. The Cramer-Rao inequality serves that purpose. For a particle hidden from direct observation, the position uncertainty determined by the enclosing boundaries leads to thermodynamics in a straightforward extension of the presented formalism. The introduction of uncertainty in classical mechanics formulation enables the translation of mechanical laws into the wide ranging conceptual framework of information theory. The boundaries between classical mechanics, thermodynamics and quantum mechanics are defined in terms of informational changes associated with the system evolution. As a direct application of the proposed formulation upper bounds for the rate of information transfer are derived.

  11. Bell's Experiment in Quantum Mechanics and Classical Physics

    E-Print Network [OSTI]

    Tom Rother

    2013-08-21

    Both the quantum mechanical and classical Bells experiment are within the focus of this paper. The fact that one measures different probabilities in both experiments is traced back to the superposition of two orthogonal but nonentangled substates in the quantum mechanical case. This superposition results in an interference term that can be splitted into two additional states representing a sink and a source of probabilities in the classical event space related to Bells experiment. As a consequence, a statistical operator can be related to the quantum mechanical Bells experiment that contains already negative quasi probabilities, as usually known from quantum optics in conjunction with the Glauber-Sudarshan equation. It is proven that the existence of such negative quasi probabilities are neither a sufficient nor a necessary condition for entanglement. The equivalence of using an interaction picture in a fixed basis or of employing a change of basis to describe Bells experiment is demonstrated afterwards. The discussion at the end of this paper regarding the application of the complementarity principle to the quantum mechanical Bells experiment is supported by very recent double slit experiments performed with polarization entangled photons.

  12. General classical and quantum-mechanical description of magnetic resonance

    E-Print Network [OSTI]

    Alexander J. Silenko

    2015-08-04

    A general theoretical description of the magnetic resonance is given. General formulas describing a behavior of all components of the polarization vector at the magnetic resonance are derived in the case of an arbitrary initial polarization. The equations obtained are exact on condition that the nonresonance rotating field is neglected. The spin dynamics is also calculated at frequencies far from resonance without neglecting the above-mentioned field. A quantum-mechanical analysis of the spin evolution at the magnetic resonance is fulfilled and the full agreement between the classical and quantum-mechanical approaches is proven. Distinguishing features of magnetic and quasimagnetic resonances for nuclei and particles moving in accelerators and storage rings which include resonances caused by the electric dipole moment are considered.

  13. General classical and quantum-mechanical description of magnetic resonance

    E-Print Network [OSTI]

    Silenko, Alexander J

    2015-01-01

    A general theoretical description of the magnetic resonance is given. General formulas describing a behavior of all components of the polarization vector at the magnetic resonance are derived in the case of an arbitrary initial polarization. The equations obtained are exact on condition that the nonresonance rotating field is neglected. The spin dynamics is also calculated at frequencies far from resonance without neglecting the above-mentioned field. A quantum-mechanical analysis of the spin evolution at the magnetic resonance is fulfilled and the full agreement between the classical and quantum-mechanical approaches is proven. Distinguishing features of magnetic and quasimagnetic resonances for nuclei and particles moving in accelerators and storage rings which include resonances caused by the electric dipole moment are considered.

  14. Classical mechanics as the many-particle limit of quantum mechanics

    E-Print Network [OSTI]

    Gabriele Carcassi

    2009-02-02

    We derive the classical limit of quantum mechanics by describing the center of mass of a system constituted by a large number of particles. We will show that in that limit the commutator between the position and velocity of the center of mass is infinitesimal, which allows both to be known with great precision. We then show how the infinitesimal commutator allows for the definition of functions of position and velocity, and how the commutator reduces to a Poisson bracket.

  15. Euler & Lagrange versus Heisenberg & Schroedinger: Dynamical Pictures in Classical and Quantum Mechanics

    E-Print Network [OSTI]

    M. Hossein Partovi

    2013-05-22

    Using quantum-classical analogies, we find that dynamical pictures of quantum mechanics have precise counterparts in classical mechanics. In particular, the Eulerian and Lagrangian descriptions of fluid dynamics in classical mechanics are the analogs of the Schroedinger and Heisenberg pictures in quantum mechanics, respectively. Similarities between classical and quantum dynamical pictures are explored within the framework of the Koopman-von Neumann formalism. These allow for a natural definition of various dynamical pictures in classical mechanics as well as the application of classical concepts to quantum dynamics. As an illustration, we use the interaction picture to find the classical evolution of an ensemble of particles of equal initial momenta and arbitrary configuration density under the action of a constant force in one dimension. As a second example, we discuss the extension of the ideas of sensitivity to initial conditions and chaos in classical mechanics to quantum mechanics.

  16. Chan, H. B.; Yelton, J. 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL...

    Office of Scientific and Technical Information (OSTI)

    in microelectromechanical systems Chan, H. B.; Yelton, J. 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Our goal was to explore the strong dependence of the Casimir force...

  17. The ramifications of diffusive volume transport in classical fluid mechanics

    E-Print Network [OSTI]

    Bielenberg, James R. (James Ronald), 1976-

    2004-01-01

    The thesis that follows consists of a collection of work supporting and extending a novel reformulation of fluid mechanics, wherein the linear momentum per unit mass in a fluid continuum, m, is supposed equal to the volume ...

  18. On the hypothesis that quantum mechanism manifests classical mechanics: Numerical approach to the correspondence in search of quantum chaos

    SciTech Connect (OSTI)

    Lee, Sang-Bong

    1993-09-01

    Quantum manifestation of classical chaos has been one of the extensively studied subjects for more than a decade. Yet clear understanding of its nature still remains to be an open question partly due to the lack of a canonical definition of quantum chaos. The classical definition seems to be unsuitable in quantum mechanics partly because of the Heisenberg quantum uncertainty. In this regard, quantum chaos is somewhat misleading and needs to be clarified at the very fundamental level of physics. Since it is well known that quantum mechanics is more fundamental than classical mechanics, the quantum description of classically chaotic nature should be attainable in the limit of large quantum numbers. The focus of my research, therefore, lies on the correspondence principle for classically chaotic systems. The chaotic damped driven pendulum is mainly studied numerically using the split operator method that solves the time-dependent Schroedinger equation. For classically dissipative chaotic systems in which (multi)fractal strange attractors often emerge, several quantum dissipative mechanisms are also considered. For instance, Hoover`s and Kubo-Fox-Keizer`s approaches are studied with some computational analyses. But the notion of complex energy with non-Hermiticity is extensively applied. Moreover, the Wigner and Husimi distribution functions are examined with an equivalent classical distribution in phase-space, and dynamical properties of the wave packet in configuration and momentum spaces are also explored. The results indicate that quantum dynamics embraces classical dynamics although the classicalquantum correspondence fails to be observed in the classically chaotic regime. Even in the semi-classical limits, classically chaotic phenomena would eventually be suppressed by the quantum uncertainty.

  19. Classical Mechanics of Collinear Positron-Hydrogen Scattering

    E-Print Network [OSTI]

    Lee, Min-Ho; Moon, Jin-Sung; Choi, Nark Nyul; Kim, Dae-Soung

    2015-01-01

    We study the classical dynamics of the collinear positron-hydrogen scattering system below the three-body breakup threshold. Observing the chaotic behavior of scattering time signals, we in- troduce a code system appropriate to a coarse grained description of the dynamics. And, for the purpose of systematic analysis of the phase space structure, a surface of section is introduced being chosen to match the code system. Partition of the surface of section leads us to a surprising conjec- ture that the topological structure of the phase space of the system is invariant under exchange of the dynamical variables of proton with those of positron. It is also found that there is a finite set of forbidden patterns of symbol sequences. And the shortest periodic orbit is found to be stable, around which invariant tori form an island of stability in the chaotic sea. Finally we discuss a possible quantum manifestation of the classical phase space structure relevant to resonances in scattering cross sections.

  20. Relativity in Classical Mechanics: Momentum, Energy and the Third Law

    E-Print Network [OSTI]

    R Assumpcao

    2005-07-19

    Most of the logical objections against the classical laws of motion, as they are usually presented in textbooks, centre on the fact that defining force in terms of mass and acceleration, the first two laws are mere assertions of concepts to be introduced in the theory; conversely, the third law expresses the experimental fact that the ratio of masses is inversely proportional to the ratio of accelerations, but it is known to fail when the interacting bodies are rapidly accelerated or far apart, leading to objections at the research level, particularly when electromagnetic phenomena is present. Following a specification of the coordinate system with respect to which velocities and accelerations are to be measured, relative to a fixed spacetime point, this contribution argues that the limitation of the third law is removed; as a consequence, Energy and Momentum relations are given an alternative formulation, extending their fundamental aspects and terms to the relativistic level. Most important, the presented alternative relations seem to preserve exactly the same form of the concepts as originally used by Newton in the Principia.

  1. On a Link between Classical Phenomenological Laws of Gases and Quantum Mechanics

    E-Print Network [OSTI]

    Yarman, Tolga; Korfali, Onder

    2008-01-01

    In this paper we find a connection between the macroscopic classical laws of gases and the quantum mechanical description of molecules, composing an ideal gas. In such a gas, the motion of each individual molecule can be considered independently on all other molecules, and thus the macroscopic parameters of ideal gas, like pressure P and temperature T, can be introduced as a result of simple averaging over all individual motions of molecules. It is shown that for an ideal gas enclosed in a macroscopic cubic box of volume V, the constant, in the classical law of adiabatic expansion, i.e.PV^5/3=const, can be derived, based on quantum mechanics. Physical implications of the result we disclose are discussed. In any case, our finding proves, seemingly for the first time, a macroscopic manifestation of a quantum mechanical behavior, and this in relation to classical thermodynamics.

  2. On a Link between Classical Phenomenological Laws of Gases and Quantum Mechanics

    E-Print Network [OSTI]

    Tolga Yarman; Alexander Kholmetskii; Onder Korfali

    2008-05-29

    In this paper we find a connection between the macroscopic classical laws of gases and the quantum mechanical description of molecules, composing an ideal gas. In such a gas, the motion of each individual molecule can be considered independently on all other molecules, and thus the macroscopic parameters of ideal gas, like pressure P and temperature T, can be introduced as a result of simple averaging over all individual motions of molecules. It is shown that for an ideal gas enclosed in a macroscopic cubic box of volume V, the constant, in the classical law of adiabatic expansion, i.e.PV^5/3=const, can be derived, based on quantum mechanics. Physical implications of the result we disclose are discussed. In any case, our finding proves, seemingly for the first time, a macroscopic manifestation of a quantum mechanical behavior, and this in relation to classical thermodynamics.

  3. On inverse problems in electromagnetic field in classical mechanics at fixed energy

    E-Print Network [OSTI]

    Alexandre Jollivet

    2007-01-04

    In this paper, we consider inverse scattering and inverse boundary value problems at sufficiently large and fixed energy for the multidimensional relativistic and nonrelativistic Newton equations in a static external electromagnetic field $(V,B)$, $V\\in C^2,$ $B\\in C^1$ in classical mechanics. Developing the approach going back to Gerver-Nadirashvili 1983's work on an inverse problem of mechanics, we obtain, in particular, theorems of uniqueness.

  4. Generalization of Hamilton-Jacobi method and its consequences in classical, relativistic, and quantum mechanics

    E-Print Network [OSTI]

    O. Chavoya-Aceves

    2004-09-25

    The Hamilton-Jacobi method is generalized, both, in classical and relativistic mechanics. The implications in quantum mechanics are considered in the case of Klein-Gordon equation. We find that the wave functions of Klein-Gordon theory can be considered as describing the motion of an ensemble of particles that move under the action of the electromagnetic field alone, without quantum potentials, hidden uninterpreted variables, or zero point fields. The number of particles is not locally conserved.

  5. Hannay Angle: Yet Another Symmetry Protected Topological Order Parameter in Classical Mechanics

    E-Print Network [OSTI]

    Kariyado, Toshikaze

    2015-01-01

    Topological way of thinking now goes beyond conventional solid materials, and topological characterization of classical mechanical systems governed by Newton's equation of motion begins to attract much attention. To have a deeper insight on physical meaning of topological numbers in mechanical systems, we demonstrate the use of the Hannay angle, a classical counterpart of the Berry phase, as a symmetry protected topological order parameter. We first derive the Hannay angle using a canonical transformation that maps the Newton's equation to the Schr\\"{o}dinger type equation. The Hannay angle is then used to characterize a simple spring-mass model topologically with a particular focus on the bulk-edge correspondence and new aspects of the symmetry in a classical system.

  6. Bosonic seesaw mechanism in a classically conformal extension of the Standard Model

    E-Print Network [OSTI]

    Naoyuki Haba; Hiroyuki Ishida; Nobuchika Okada; Yuya Yamaguchi

    2015-08-27

    We suggest the so-called bosonic seesaw mechanism in the context of a classically conformal $U(1)_{B-L}$ extension of the Standard Model with two Higgs doublet fields. The $U(1)_{B-L}$ symmetry is radiatively broken via the Coleman-Weinberg mechanism, which also generates the mass terms for the two Higgs doublets through quartic Higgs couplings. Their masses are all positive but, nevertheless, the electroweak symmetry breaking is realized by the bosonic seesaw mechanism. Analyzing the renormalization group evolutions for all model couplings, we find that a large hierarchy among the quartic Higgs couplings, which is crucial for the bosonic seesaw mechanism to work, is dramatically reduced toward high energies. Therefore, the bosonic seesaw is naturally realized with only a mild hierarchy, if some fundamental theory, which provides the origin of the classically conformal invariance, completes our model at some high energy, for example, the Planck scale. We identify the regions of model parameters which satisfy the perturbativity of the running couplings and the electroweak vacuum stability as well as the naturalness of the electroweak scale.

  7. Testing spontaneous wave-function collapse models on classical mechanical oscillators

    E-Print Network [OSTI]

    Lajos Diósi

    2014-11-17

    We show that the heating effect of spontaneous wave-function collapse models implies an experimentally significant increment $\\Delta T$ of equilibrium temperature in a mechanical oscillator. The obtained form $\\Delta T$ is linear in the oscillator's relaxation time $\\tau$ and independent of the mass. The oscillator can be in a classical thermal state, the effect $\\Delta T$ is classical for a wide range of frequencies and quality factors. We note that the test of $\\Delta T$ does not necessitate quantum state monitoring but tomography. In both gravity-related (DP) and continuous spontaneous localization (CSL) models the strong-effect edge of their parameter range can be challenged in existing experiments on classical oscillators. For the CSL theory, the conjectured highest collapse rate parameter values become immediately constrained by evidences from current experiments on extreme slow-ring-down oscillators.

  8. Finding way to bridge the gap between quantum and classical mechanics

    E-Print Network [OSTI]

    Wang Guowen

    2005-12-12

    We have calculated the momentum distributions of nanoparticles in diffraction and interference dependent on the effective screening mass parameter or size parameter and presented the calculations for a nanoparticle inside an infinite square potential well and for a tunnelling nanoparticle through a square potential barrier. These results display the transition from quantum to classical mechanics and the simultaneous wave-particle duality of nanoparticles. The concept that the effective screening effect increases with increasing size of an object paves way for development of nanomechanics and nanotechnology.

  9. On the Mean-Field and Classical Limits of Quantum Mechanics

    E-Print Network [OSTI]

    François Golse; Clément Mouhot; Thierry Paul

    2015-08-10

    The main result in this paper is a new inequality bearing on solutions of the $N$-body linear Schr\\"{o}dinger equation and of the mean field Hartree equation. This inequality implies that the mean field limit of the quantum mechanics of $N$ identical particles is uniform in the classical limit and provides a quantitative estimate of the quality of the approximation. This result applies to the case of $C^{1,1}$ interaction potentials. The quantity measuring the approximation of the $N$-body quantum dynamics by its mean field limit is analogous to the Monge-Kantorovich (or Wasserstein) distance with exponent $2$. The inequality satisfied by this quantity is reminiscent of the work of Dobrushin on the mean field limit in classical mechanics [Func. Anal. Appl. 13 (1979), 115-123]. Our approach of this problem is based on a direct analysis of the $N$-particle Liouville equation, and avoids using techniques based on the BBGKY hierarchy or on second quantization.

  10. Quantum Chaos and Statistical Mechanics

    E-Print Network [OSTI]

    Mark Srednicki

    1994-06-14

    We briefly review the well known connection between classical chaos and classical statistical mechanics, and the recently discovered connection between quantum chaos and quantum statistical mechanics.

  11. & Mechanical Engineering

    E-Print Network [OSTI]

    Zhou, Chongwu

    AME Aerospace & Mechanical Engineering #12;Aerospace and Mechanical Engineers design complex mechanical, thermal, uidic, acoustical, optical, and electronic systems, with characteristic sizes ranging and far underground, to near-Earth, planetary, interplanetary and galactic space. Aerospace and Mechanical

  12. AMEAerospace & Mechanical

    E-Print Network [OSTI]

    Wang, Hai

    , emerging fuel cell technolo- gies, computational fluid mechanics, ground vehicle aerodynamics, combustion students develop problem solving skills in the areas of mechanics, thermody- namics, fluid mechanics, heat advance our understanding of such areas as continuum and particulate fluid mechanics, flight mechanics

  13. Bohmian Mechanics

    E-Print Network [OSTI]

    Detlef Duerr; Sheldon Goldstein; Roderich Tumulka; Nino Zanghi

    2009-03-15

    Bohmian mechanics is a theory about point particles moving along trajectories. It has the property that in a world governed by Bohmian mechanics, observers see the same statistics for experimental results as predicted by quantum mechanics. Bohmian mechanics thus provides an explanation of quantum mechanics. Moreover, the Bohmian trajectories are defined in a non-conspiratorial way by a few simple laws.

  14. Chaos and low-order corrections to classical mechanics or geometrical optics

    SciTech Connect (OSTI)

    Sundaram, B. (Department of Physics and Center for Theoretical Physics, Texas A M University, College Station, Texas 77843-4242 (United States)); Milonni, P.W. (Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States))

    1995-03-01

    Based on simple first-order quantum corrections to classical equations of motion, which we show to be closely related to Gaussian wave-packet dynamics (GWD) and a time-dependent variational principle (TDVP), we deduce that quantum corrections to classical dynamics should typically become most pronounced when the classical system becomes chaotic. The time duration over which classical dynamics, GWD, or TDVP may provide good approximations is much shorter when the classical dynamics are chaotic. However, for certain situations involving very short laser pulses, these approximations can be very accurate. The same concepts are applicable to paraxial wave optics, which may offer simpler experimental studies of quantum chaos'': the distinction between classical and quantum'' chaos is in large part the distinction between ray versus wave behavior.

  15. Quantum Mechanical Disclosure of the Classical Adiabatic Constancy of PVg for an Ideal Gas, and for a Photon Gas

    E-Print Network [OSTI]

    Arik, Metin; Kholmetskii, Alexander L

    2009-01-01

    Previously, we established a connection between the macroscopic classical laws of gases and the quantum mechanical description of molecules of an ideal gas (T. Yarman et al. arXiv:0805.4494). In such a gas, the motion of each molecule can be considered independently on all other molecules, and thus the macroscopic parameters of the ideal gas, like pressure P and temperature T, can be introduced as a result of simple averaging over all individual motions of the molecules. It was shown that for an ideal gas enclosed in a macroscopic cubic box of volume V, the constant, arising along with the classical law of adiabatic expansion, i.e. PV5/3=constant, can be explicitly derived based on quantum mechanics, so that the constant comes to be proportional to h^2/m; here h is the Planck Constant, and m is the relativistic mass of the molecule the gas is made of. In this article we show that the same holds for a photon gas, although the related setup is quite different than the previous ideal gas setup. At any rate, we c...

  16. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Pool boiling heat transfer enhancement is taking a dramatic turn Mechanical Engineering Rochester Institute of Technology September 5, 2014 at 1:30pm in SCOB 210 School from the classical area enhancement and nucleation cavity augmentation to mechanism based

  17. QUICK QUANTUM MECHANICS ---Introduction ---

    E-Print Network [OSTI]

    Jackson, Andrew D.

    QUICK QUANTUM MECHANICS --- Introduction --- The following notes are intended to be a supplement to your study of Liboff's ``Introductory Quantum Mechanics.'' They are not an alternative! My purpose here of Classical Mechanics After Newton found his equations of motion, physicists knew they would have to wait

  18. Bohmian mechanics contradicts quantum mechanics

    E-Print Network [OSTI]

    Neumaier, Arnold

    Bohmian mechanics contradicts quantum mechanics Arnold Neumaier Institut fur Mathematik, Universit://solon.cma.univie.ac.at/#24;neum/ Abstract. It is shown that, for a harmonic oscillator in the ground state, Bohmian mechanics and quantum mechanics predict values of opposite sign for certain time correlations. The discrepancy can

  19. The Classical and Quantum Mechanics of a Particle on a Knot

    E-Print Network [OSTI]

    V. V. Sreedhar

    2015-01-06

    A free particle is constrained to move on a knot obtained by winding around a putative torus. The classical equations of motion for this system are solved in a closed form. The exact energy eigenspectrum, in the thin torus limit, is obtained by mapping the time-independent Schrodinger equation to the Mathieu equation. In the general case, the eigenvalue problem is described by the Hill equation. Finite-thickness corrections are incorporated perturbatively by truncating the Hill equation. Comparisons and contrasts between this problem and the well-studied problem of a particle on a circle (planar rigid rotor) are performed throughout.

  20. Origin of Mass. Mass and Mass-Energy Equation from Classical-Mechanics Solution

    E-Print Network [OSTI]

    J. X. Zheng-Johansson; P-I. Johansson

    2006-01-23

    We establish the classical wave equation for a particle formed of a massless oscillatory elementary charge generally also traveling, and the resulting electromagnetic waves, of a generally Doppler-effected angular frequency $\\w$, in the vacuum in three dimensions. We obtain from the solutions the total energy of the particle wave to be $\\eng=\\hbarc\\w$, $2\\pi \\hbarc$ being a function expressed in wave-medium parameters and identifiable as the Planck constant. In respect to the train of the waves as a whole traveling at the finite velocity of light $c$, $\\eng=mc^2$ represents thereby the translational kinetic energy of the wavetrain, $m=\\hbarc\\w/c^2$ being its inertial mass and thereby the inertial mass of the particle. Based on the solutions we also write down a set of semi-empirical equations for the particle's de Broglie wave parameters. From the standpoint of overall modern experimental indications we comment on the origin of mass implied by the solution.

  1. Mechanical Engineering 1 Mechanical Engineering

    E-Print Network [OSTI]

    Haller, Gary L.

    , for example, in novel gas turbine or electric hybrid vehicles--require that students understand the fundamentals of mechanics, thermodynamics, fluid mechanics, combustion, and materials science. In all members of the next generation of mechanical engineers. To implement this mission, the department adheres

  2. Bohmian mechanics contradicts quantum mechanics

    E-Print Network [OSTI]

    Arnold Neumaier

    2000-02-16

    It is shown that, for a harmonic oscillator in the ground state, Bohmian mechanics and quantum mechanics predict values of opposite sign for certain time correlations. The discrepancy can be explained by the fact that Bohmian mechanics has no natural way to accomodate the Heisenberg picture, since the local expectation values that define the beables of the theory depend on the Heisenberg time being used to define the operators. Relations to measurement are discussed, too, and shown to leave no loophole for claiming that Bohmian mechanics reproduces all predictions of quantum mechanics exactly.

  3. Compliant mechanisms 

    E-Print Network [OSTI]

    Venkataraghavan, Janarthanan T

    2001-01-01

    and a few mechanisms like a magneto active peristaltic pump, have been designed and tested for the first time using this material. In this mechanism, the pumping action is obtained when a moving magnetic field produces peristaltic waves in the magneto...

  4. MECHANICAL ENGINEERING What is Mechanical

    E-Print Network [OSTI]

    power plant energy conversion and generating systems; design, development, and manufactureof consumer of the broadest engineering fields. Mechanical engineers are found in virtually all productive industries, from

  5. Why our human-sized world behaves classically, not quantum-mechanically: A popular non-technical exposition of a new idea

    E-Print Network [OSTI]

    C. L. Herzenberg

    2007-01-13

    This article provides a popular, largely non-technical explanation of how large objects can behave classically while smaller objects behave quantum mechanically, based on the effect of the presence of cosmic expansion velocities in extended objects. This article is intended to provide a more accessible presentation of concepts introduced in earlier papers that address this long-standing enigma in physics.

  6. Mechanical memory

    DOE Patents [OSTI]

    Gilkey, Jeffrey C. (Albuquerque, NM); Duesterhaus, Michelle A. (Albuquerque, NM); Peter, Frank J. (Albuquerque, NM); Renn, Rosemarie A. (Alburquerque, NM); Baker, Michael S. (Albuquerque, NM)

    2006-08-15

    A first-in-first-out (FIFO) microelectromechanical memory apparatus (also termed a mechanical memory) is disclosed. The mechanical memory utilizes a plurality of memory cells, with each memory cell having a beam which can be bowed in either of two directions of curvature to indicate two different logic states for that memory cell. The memory cells can be arranged around a wheel which operates as a clocking actuator to serially shift data from one memory cell to the next. The mechanical memory can be formed using conventional surface micromachining, and can be formed as either a nonvolatile memory or as a volatile memory.

  7. Mechanical memory

    DOE Patents [OSTI]

    Gilkey, Jeffrey C. (Albuquerque, NM); Duesterhaus, Michelle A. (Albuquerque, NM); Peter, Frank J. (Albuquerque, NM); Renn, Rosemarie A. (Albuquerque, NM); Baker, Michael S. (Albuquerque, NM)

    2006-05-16

    A first-in-first-out (FIFO) microelectromechanical memory apparatus (also termed a mechanical memory) is disclosed. The mechanical memory utilizes a plurality of memory cells, with each memory cell having a beam which can be bowed in either of two directions of curvature to indicate two different logic states for that memory cell. The memory cells can be arranged around a wheel which operates as a clocking actuator to serially shift data from one memory cell to the next. The mechanical memory can be formed using conventional surface micromachining, and can be formed as either a nonvolatile memory or as a volatile memory.

  8. On Foundations of Newtonian Mechanics

    E-Print Network [OSTI]

    Al Cheremensky

    2011-03-27

    Being based on V. Konoplev's axiomatic approach to continuum mechanics, the paper broadens its frontiers in order to bring together continuum mechanics with classical mechanics in a new theory of mechanical systems. There are derived motion equations of `abstract' mechanical systems specified for mass-points, multibody systems and continua: Newton-Euler equations, Lagrange equations of II kind and Navier-Stokes ones. Quasi-linear constitutive equations are introduced in conformity with V. Konoplev's definition of stress and strain (rate) matrices.

  9. Advanced Mechanics. Mathematical Introduction

    E-Print Network [OSTI]

    G. Giachetta; L. Mangiarotti; G. Sardanashvily

    2010-01-20

    Classical non-relativistic mechanics in a general setting of time-dependent transformations and reference frame changes is formulated in the terms of fibre bundles over the time-axis R. Connections on fibre bundles are the main ingredient in this formulation of mechanics which thus is covariant under reference frame transformations. The basic notions of a non-relativistic reference frame, a relative velocity, a free motion equation, a relative acceleration, an external force are formulated. Newtonian, Lagrangian, Hamiltonian mechanical systems and the relations between them are defined. Lagrangian and Hamiltonian conservation laws are considered.

  10. Fractofusion mechanism

    SciTech Connect (OSTI)

    Yasui, K. . Dept. of Physics)

    1992-11-01

    In this paper, the fractofusion mechanism of cold fusion is investigated theoretically. The conditions necessary for fractofusion during the absorption of deuterium atoms by palladium specimens (the condition of so-called cold fusion experiments) is clarified, including crack generation at grain boundaries, the high orientation angle of grains, rapid crack formation, the increase of electrical resistance around a crack, the large width of cracks, and the generation of many cracks. The origin and quantity of the electrical field inside cracks in the conductor are also clarified. By the fractofusion mechanism, the experimental facts that neutron emissions are observed in bursts, that sometimes they coincide with the deformation of a palladium specimen, and that in many experiments excess neutrons were not observed are qualitatively explained. The upper limit of the total fractofusion yields during the absorption of deuterium atoms by palladium specimens are estimated.

  11. Mechanical Engineering ME 3720 FLUID MECHANICS

    E-Print Network [OSTI]

    Panchagnula, Mahesh

    Mechanical Engineering ME 3720 FLUID MECHANICS Pre-requisite: ME 2330 Co-requisite: ME 3210) to develop an understanding of the physical mechanisms and the mathematical models of fluid mechanics of fluid mechanics problems in engineering practice. The basic principles of fluid mechanics

  12. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering An experimental methodology is presented for mechanism verification of physics-based prognosis of mechanical damage, such as fatigue. The proposed experimental methodology includes multi-resolution in-situ mechanical testing, advanced imaging analysis, and mechanism

  13. Mechanical Buckling: Mechanics, Metrology, and Stretchable Electronics

    E-Print Network [OSTI]

    Rogers, John A.

    Mechanical Buckling: Mechanics, Metrology, and Stretchable Electronics By Dahl-Young Khang, John A of wrinkling is in aging human skin. All such phenomena originate from the same mechanism, i.e., mechanical of the wave, or their wavelength, depends upon the film thickness and/or mechanical properties of materials

  14. An experimental test of the non-classicality of quantum mechanics using an unmovable and indivisible system

    E-Print Network [OSTI]

    Xi Kong; Mingjun Shi; Fazhan Shi; Pengfei Wang; Pu Huang; Qi Zhang; Chenyong Ju; Changkui Duan; Sixia Yu; Jiangfeng Du

    2012-10-03

    Quantum mechanics provides a statistical description about nature, and thus would be incomplete if its statistical predictions could not be accounted for by some realistic models with hidden variables. There are, however, two powerful theorems against the hidden-variable theories showing that certain quantum features cannot be reproduced based on two rationale premises of locality, Bell's theorem, and noncontextuality, due to Bell, Kochen and Specker (BKS). Noncontextuality is independent of nonlocality, and the contextuality manifests itself even in a single object. Here we report an experimental verification of quantum contextuality by a single spin-1 electron system at room temperature. Such a three-level system is indivisible and then we close the compatibility loophole which exists in the experiments performed on bipartite systems. Our results confirm the quantum contextuality to be the intrinsic property of single particles.

  15. InGaAs tunnel diodes for the calibration of semi-classical and quantum mechanical band-to-band tunneling models

    SciTech Connect (OSTI)

    Smets, Quentin; Verreck, Devin; Vandervorst, Wilfried; Groeseneken, Guido; Heyns, Marc M. [Imec, Kapeldreef 75, 3001 Heverlee (Belgium); KULeuven, 3001 Leuven (Belgium); Verhulst, Anne S.; Rooyackers, Rita; Merckling, Clément; Simoen, Eddy; Collaert, Nadine; Thean, Voon Y. [Imec, Kapeldreef 75, 3001 Heverlee (Belgium); Van De Put, Maarten; Sorée, Bart [Imec, Kapeldreef 75, 3001 Heverlee (Belgium); Universiteit Antwerpen, 2020 Antwerpen (Belgium)

    2014-05-14

    Promising predictions are made for III-V tunnel-field-effect transistor (FET), but there is still uncertainty on the parameters used in the band-to-band tunneling models. Therefore, two simulators are calibrated in this paper; the first one uses a semi-classical tunneling model based on Kane's formalism, and the second one is a quantum mechanical simulator implemented with an envelope function formalism. The calibration is done for In{sub 0.53}Ga{sub 0.47}As using several p+/intrinsic/n+ diodes with different intrinsic region thicknesses. The dopant profile is determined by SIMS and capacitance-voltage measurements. Error bars are used based on statistical and systematic uncertainties in the measurement techniques. The obtained parameters are in close agreement with theoretically predicted values and validate the semi-classical and quantum mechanical models. Finally, the models are applied to predict the input characteristics of In{sub 0.53}Ga{sub 0.47}As n- and p-lineTFET, with the n-lineTFET showing competitive performance compared to MOSFET.

  16. MECHANICAL ENGINEERING Curriculum Notes

    E-Print Network [OSTI]

    Mohan, Chilukuri K.

    MECHANICAL ENGINEERING Curriculum Notes 2013-2014 1. Mechanical engineering students must complete of technical electives. 2. Technical electives must be taken within the Mechanical and Aerospace Engineering

  17. Physicalism versus quantum mechanics

    E-Print Network [OSTI]

    Stapp, Henry P; Theoretical Physics Group; Physics Division

    2009-01-01

    Foundations of Quantum Mechanics. (Princeton UniversityMind, Matter, and Quantum Mechanics, (Springer, Berlin & NewMindful Universe: Quantum Mechanics and the Participating

  18. Sandia Energy - Mechanical Testing

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mechanical Testing Home Stationary Power Nuclear Fuel Cycle Advanced Nuclear Energy Nuclear Energy Systems Laboratory (NESL) Brayton Lab Mechanical Testing Mechanical...

  19. Grassmann Matrix Quantum Mechanics

    E-Print Network [OSTI]

    Dionysios Anninos; Frederik Denef; Ruben Monten

    2015-12-11

    We explore quantum mechanical theories whose fundamental degrees of freedom are rectangular matrices with Grassmann valued matrix elements. We study particular models where the low energy sector can be described in terms of a bosonic Hermitian matrix quantum mechanics. We describe the classical curved phase space that emerges in the low energy sector. The phase space lives on a compact Kahler manifold parameterized by a complex matrix, of the type discovered some time ago by Berezin. The emergence of a semiclassical bosonic matrix quantum mechanics at low energies requires that the original Grassmann matrices be in the long rectangular limit. We discuss possible holographic interpretations of such matrix models which, by construction, are endowed with a finite dimensional Hilbert space.

  20. Grassmann Matrix Quantum Mechanics

    E-Print Network [OSTI]

    Anninos, Dionysios; Monten, Ruben

    2015-01-01

    We explore quantum mechanical theories whose fundamental degrees of freedom are rectangular matrices with Grassmann valued matrix elements. We study particular models where the low energy sector can be described in terms of a bosonic Hermitian matrix quantum mechanics. We describe the classical curved phase space that emerges in the low energy sector. The phase space lives on a compact Kahler manifold parameterized by a complex matrix, of the type discovered some time ago by Berezin. The emergence of a semiclassical bosonic matrix quantum mechanics at low energies requires that the original Grassmann matrices be in the long rectangular limit. We discuss possible holographic interpretations of such matrix models which, by construction, are endowed with a finite dimensional Hilbert space.

  1. QUANTUM MECHANICS WITHOUT STATISTICAL POSTULATES

    SciTech Connect (OSTI)

    G. GEIGER; ET AL

    2000-11-01

    The Bohmian formulation of quantum mechanics describes the measurement process in an intuitive way without a reduction postulate. Due to the chaotic motion of the hidden classical particle all statistical features of quantum mechanics during a sequence of repeated measurements can be derived in the framework of a deterministic single system theory.

  2. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Ductile failure in structural materials has been a problem the Temple Foundation Professorship in the Department of Aerospace Engineering and Engineering Mechanics, multiscale experimental mechanics, mechanics of polymers. He is a fellow of the American Society

  3. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar Three Dimensional Traction Force Microscopy with Applications in Cell Mechanics abstract The interactions between biochemical and mechanical signals during-dimensional measurement techniques are needed to investigate the effect of mechanical properties of the substrate

  4. Research Review Mechanical Engineering

    E-Print Network [OSTI]

    Theune, Mariët

    Research Review Mechanical Engineering University of Twente #12;QANU / Research Review Mechanical;QANU / Research Review Mechanical Engineering / University of Twente 3 Report on the research assessment of Mechanical Engineering at the University of Twente Contents Preface

  5. Physicalism versus quantum mechanics

    E-Print Network [OSTI]

    Henry P. Stapp

    2008-03-11

    In the context of theories of the connection between mind and brain, physicalism is the demand that all is basically purely physical. But the concept of "physical" embodied in this demand is characterized essentially by the properties of the physical that hold in classical physical theories. Certain of these properties contradict the character of the physical in quantum mechanics, which provides a better, more comprehensive, and more fundamental account of phenomena. It is argued that the difficulties that have plaged physicalists for half a century, and that continue to do so, dissolve when the classical idea of the physical is replaced by its quantum successor. The argument is concretized in a way that makes it accessible to non-physicists by exploiting the recent evidence connecting our conscious experiences to macroscopic measurable synchronous oscillations occurring in well-separated parts of the brain. A specific new model of the mind-brain connection that is fundamentally quantum mechanical but that ties conscious experiences to these macroscopic synchronous oscillations is used to illustrate the essential disparities between the classical and quantum notions of the physical, and in particular to demonstrate the failure in the quantum world of the principle of the causal closure of the physical, a failure that goes beyond what is entailed by the randomness in the outcomes of observations, and that accommodates the efficacy in the brain of conscious intent.

  6. 5.72 Statistical Mechanics, Spring 2008

    E-Print Network [OSTI]

    Cao, Jianshu

    This course discusses the principles and methods of statistical mechanics. Topics covered include classical and quantum statistics, grand ensembles, fluctuations, molecular distribution functions, other concepts in equilibrium ...

  7. Violation of Bell's inequality in fluid mechanics

    E-Print Network [OSTI]

    Robert Brady; Ross Anderson

    2013-05-28

    We show that a classical fluid mechanical system can violate Bell's inequality because the fluid motion is correlated over large distances.

  8. Mechanical & Biomedical Engineering

    E-Print Network [OSTI]

    Barrash, Warren

    Mechanical & Biomedical Engineering Department BACHELOR OF SCIENCE IN MECHANICAL ENGINEERING COURSE 105 Mechanical Engineering Graphics 3 CHEM 111L College Chemistry Lab (DLN) 1 ENGL 102 English PHYS 211 Mechanics, Waves & Heat (DLN) 4 UF 100 Intellectual Foundations 3 PHYS 211L Mechanics, Waves

  9. Mechanical Engineering & Thermal Group

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    LASP's mechanical analysts also lead mechanical verification testing including: random vibration, forceMechanical Engineering & Thermal Group The Mechanical Engineering (ME) & Thermal Group at LASP has, and ground- based mechanical systems. Instrument Design Building on decades of design experience that has

  10. QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS...

    Office of Scientific and Technical Information (OSTI)

    of model atoms in fields Milonni, P.W. 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; OPTICAL MODELS; QUANTUM MECHANICS;...

  11. Mechanical, Industrial & Manufacturing

    E-Print Network [OSTI]

    Balasubramanian, Ravi

    Mechanical, Industrial & Manufacturing Engineering (MIME) COLLEGE OF ENGINEERING FY2013 Oregon graduate degrees (MS, MEng, PhD) in mechanical engineering, industrial engineering, and materials science. We offer bachelor's degrees in mechanical, industrial, manufacturing, and energy systems engineering

  12. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Despite an enormous range of applications and centuries. Nicholas Ouellette is an Associate Professor in the Department of Mechanical Engineering & Materials Structures in Turbulent Flow Nicholas Ouellette Department of Mechanical Engineering & Material Sciences Yale

  13. Mechanical Systems Signal Processing

    E-Print Network [OSTI]

    Verleysen, Michel

    Mechanical Systems and Signal Processing Mechanical Systems and Signal Processing 22 (2008) 155 Department of Mechanical Engineering, University of Sheffield, Mappin Street S1 3JD Sheffield, UK Received 27

  14. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering This presentation presents the stability analysis of time- delay of the Department of Mechanical and Industrial Engineering, Southern Illinois University Edwardsville, where he has Gu Dept. of Mechanical & Industrial Engineering Southern Illinois University, Edwardsville March 27

  15. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering With the increases in computational power and numerical methods a series of research challenges. These challenges involve many branches of mechanical engineering: mechanics, dynamics, tribology, statistical modeling, experimentation, and numerical methods. During

  16. Mechanical & Industrial Engineering

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Mechanical & Industrial Engineering 1 Welcome MIE Industrial Advisory Board October 15, 2010 #12;Mechanical & Industrial Engineering 2 MIE Dorothy Adams Undergraduate/Graduate Secretary David Schmidt Associate Professor & Graduate Program Director #12;Mechanical & Industrial Engineering 3 MIE James Rinderle

  17. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Today's design environments take advantage of powerful professor of Mechanical Engineering at Carnegie Mellon University. He is the founder of Visual Design award and American Society of Mechanical Engineers Design Automation Society Young Investigator Award

  18. Department of Mechanical & Aerospace

    E-Print Network [OSTI]

    Zhigilei, Leonid V.

    in mechanics, electrical theory, kinematics, thermodynamics, fluid mechanics, heat transfer and materials dynamics, fluid dynamics, propulsion and structures. While each program features a solid technicalDeveloping Leaders of Innovation Department of Mechanical & Aerospace Engineering #12;Emphasizing

  19. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The gap between `advanced' prosthetic technology was educated in Mechanical and Biomedical Engineering at the University of Illinois and Northwestern University

  20. Mechanical Performance Extreme Conditions

    E-Print Network [OSTI]

    Mechanical Performance ­ Extreme Conditions METALS This project provides property data, metrology information using the image correlation technique. With this instrument, high strain rate mechanical testing

  1. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering In the pursuit of developing manned, reusable hypersonic will experience thermal and mechanical loads. The research presented will discuss advancements in structural

  2. Mechanical Engineering Graduate Student

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Mechanical Engineering Graduate Student Handbook January 2015 Department of Mechanical Engineering University of Wisconsin-Madison #12;1 Mechanical Engineering Web Page: http://www.engr.wisc.edu/me Graduate & Terrace Chairs) and Samantha Stepp (ME Building) #12;2 Department of Mechanical Engineering AGUIDE

  3. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Bone is a biological material with excellent material properties the properties at lower level serve as inputs for modeling at the next structural level. Mechanical properties and applied mechanics at Northwestern University. Prior to joining the faculty of mechanical engineering

  4. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Strategic Plan 2014-2018 College of Engineering, Architecture & Technology #12;Mechanical and Aerospace Engineering at Oklahoma State University was organized as Mechanical the strongest in the nation. MAE is proud to continue in this fine tradition, forging high quality mechanical

  5. Mechanical Engineering David Sumner

    E-Print Network [OSTI]

    Saskatchewan, University of

    Mechanical Engineering David Sumner david.sumner@usask.ca #12;Mechanical Engineering? · Design, production and use of mechanical systems that control and transform energy · Focused on engineering systems that involve heat, energy and motion · The broadest engineering discipline #12;Subject Areas · Fluid mechanics

  6. Mechanical & Industrial Engineering

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Mechanical & Industrial Engineering 1 Welcome MIE Industrial Advisory Board May 5th, 2011 #12;Mechanical & Industrial Engineering 2 IAB 2010-2011 · David K. Anderson ­ Alden Research Laboratory, Inc went on for three weeks Mechanical & Industrial Engineering 6 #12;Reza Shahbazian Yassar Mechanical

  7. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The science of robotics is a unique combination of mechanical in Dayton, OH. Dr. Sodemann received a PhD in Mechanical Engineering from the Georgia Institute to recent advances in the science of robotics, and thus the machines perform primarily as mechanical devices

  8. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Nanocrystal superlattices are materials formed by assembly Professor in the Department of Mechanical Engineering and Applied Mechanics at the University her B.S. in Mechanical Engineering magna cum laude from Rice University in 1994 and was elected to Phi

  9. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering This talk concerns the effective behavior of heterogeneous media Science as well as the Executive Officer for Mechanical and Civil Engineering at the California Institute in Applied Mechanics from the American Society of Mechanical Engineers in 2004. He is currently an Editor

  10. INTRODUCTION TO THE MECHANICS

    E-Print Network [OSTI]

    Kaminski, Edouard

    INTRODUCTION TO THE MECHANICS OF A CONTINUOUS MEDIUM Lawrence E. Malvern Professor of Mechanics princi- ples common to all branches of solid and fluid mechanics, designed to appeal to the intuition science. The book arose from the need to provide a general preparation in contin- uum mechanics

  11. On Concept of Mechanical System

    E-Print Network [OSTI]

    Al Cheremensky

    2013-02-28

    The paper gives a screw axiomatics of rational mechanics, namely: 1. introduces the main measures of mechanics: the mass measure, the scalar and (vector) screw measures of motion, the (vector) screw measure of impressed action, the increment velocity of the vector measure of motion, the (vector) screw measure of constraint action; 2. postulates the (stronger) local integral form of conservation law for the vector measuare of motion (fundamental principle of dynamics), and 3. defines the central concept of rational mechanics {mechanical system being realized in the form of all classical mechanical systems (mass-points, rigid bodies, continua, point-bodies, etc.). The presentation is based on new notions of vector calculus -- homogeneous and inhomogeneous vector and tensor slider-functions and screw measures.

  12. MechanicalEngineering The Department of Mechanical

    E-Print Network [OSTI]

    for the informed development and optimization of materials. This talk will present our recent work on exploring, Ph.D. Associate Professor Department of Mechanical Engineering Department of Materials Science to thermo-mechanical loads is a fundamental requirement in the characterization of materials and structures

  13. Quantum Mechanics and Multiply Connected Spaces

    E-Print Network [OSTI]

    B. G. Sidharth

    2006-05-16

    t is well known that the difference between Quantum Mechanics and Classical Theory appears most crucially in the non Classical spin half of the former theory and the Wilson-Sommerfelt quantization rule. We argue that this is symptomatic of the fact that Quantum Theory is actually a theory in multiply connected space while Classical Theory operates in simply connected space.

  14. Internal pipe attachment mechanism

    DOE Patents [OSTI]

    Bast, R.M.; Chesnut, D.A.; Henning, C.D.; Lennon, J.P.; Pastrnak, J.W.; Smith, J.A.

    1994-12-13

    An attachment mechanism is described for repairing or extending fluid carrying pipes, casings, conduits, etc. utilizing one-way motion of spring tempered fingers to provide a mechanical connection between the attachment mechanism and the pipe. The spring tempered fingers flex to permit insertion into a pipe to a desired insertion depth. The mechanical connection is accomplished by reversing the insertion motion and the mechanical leverage in the fingers forces them outwardly against the inner wall of the pipe. A seal is generated by crushing a sealing assembly by the action of setting the mechanical connection. 6 figures.

  15. What happened to the Bohr-Sommerfeld elliptic orbits in Schrodinger's wave mechanics?

    E-Print Network [OSTI]

    Nauenberg, Michael

    2015-01-01

    Przibram, Letters on Wave Mechanics (Philosophical Library,Quantum to Classical Mechanics in Atomic Physics, CommentsSchr¨odinger’s wave mechanics? Michael Nauenberg University

  16. MechanicalEngineering Colloquium The Department of Mechanical

    E-Print Network [OSTI]

    MechanicalEngineering Colloquium The Department of Mechanical Engineering PRESENTS John C. Bischof Distinguished Professor Mechanical and Biomedical Engineering Chair, Mechanical Engineering University in the Departments of Mechanical and Biomedical Engineering and the inaugural Carl and Janet Kuhrmeyer Chair

  17. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering We introduce phonon recycling (local reabsorption of emitted) is Professor in Department of Mechanical Engineering and in Applied Physics Program, University of Michigan of Mechanical Engineering University of Michigan November 1, 2013 at 1:30pm in SCOB 228 School for Engineering

  18. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar Manipulation of Energy and Mass Transport at Micro as an assistant professor in the Department of Mechanical Engineering and was promoted to an associate professor award in 2007. Dr. Deyu Li Department of Mechanical Engineering Vanderbilt University January 20, 2012

  19. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Thermal transport plays an important role in energy conversion conductivity and phonon transport mechanisms over the past 2 decades, owing much to the challenging needs Faculty Fellow in Engineering and an Associate Professor of Mechanical Engineering directing the Nano

  20. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Interfacial flows are multi-material flows comprised of two and Solid Mechanics group in the Theoretical Division. Her research focuses on the development of numerical, and nuclear energy. She is a member of the American Society of Mechanical Engineers (ASME), Fluids Engineering

  1. Department of Mechanical and

    E-Print Network [OSTI]

    Huang, Jianwei

    Department of Mechanical and Automation Engineering #12;4 2 3 1 Contents Messages in the souvenir publication of the Department of Mechanical and Automation Engineering of The Chinese University of Mechanical and Automation Engineering have also played a significant part in equipping businesses

  2. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Much of past research in structural dynamics (and many other the University of Liege, Belgium, in 1983 and his Ph.D. in mechanical engineering from Rice University in 1987. He then joined the rather newly formed Department of Mechanical and Aerospace Engineering at ASU

  3. TOWARDS MECHANICAL METAMATHEMATICS

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    TOWARDS MECHANICAL METAMATHEMATICS N. Shankar Technical Report 43 December 1984 Institute application of certain mechanical rules of inference. The derivations of theorems from the axioms are termed of a valid mathematical argument. Another advantage of formal proofs is that they can be mechanically checked

  4. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering It has been demonstrated that the color pattern of the human received the B.A. degree in physics from Houghton College, Houghton, NY, and the B.S. degree in mechanical in mechanical engineering from the Massachusetts Institute of Technology (MIT), Cambridge, MA, in 1997 and 2002

  5. A mechanical encapsulatio n

    E-Print Network [OSTI]

    Jackson, Trachette L.

    A mechanical mo delo f tumo r encapsulatio n and transcapsular spread Trachette L. Jackso n a 48109­1109, USA b Division of Theoretical Mechanics, School of Mathematical Sciences, University rmatio n, such investigatio ns being ideally suited to o ur mechanical mo del. The mo del simulatio ns

  6. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Fragmentation is a process in which structures fail in a very Engineering at Duke University, where he directs the Duke Computational Mechanics Laboratory. Professor Dolbow received his BS in Mechanical Engineering from the University of New Hampshire in 1995, and his Ph

  7. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The miniaturization of structural components to the sub progress in strain-gradient continuum theories to model the mechanical behavior of metallic systems at small length scales, these theories fail to represent the variety of physical mechanisms involved

  8. Mechanical Engineering Assistant Professor

    E-Print Network [OSTI]

    Chandy, John A.

    Mechanical Engineering Xu Chen Assistant Professor xchen@uconn.edu http://xchen.lab.uconn.edu From Engineering Ingredients of Kung Pao Chicken Marinade · 1 tablespoon soy sauce · 2 teaspoons Chinese rice wine of Diana Kuan #12;Mechanical Engineering The Cooking Procedure #12;Mechanical Engineering The Difference

  9. Mechanical & Industrial Engineering

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Mechanical & Industrial Engineering Mario A. Rotea Professor and Department Head #12;2Mechanical & Industrial Engineering Outline · Undergraduate Degree Programs · Graduate Degree Programs · The Faculty · The Research · Summary #12;3Mechanical & Industrial Engineering Undergraduate Programs ­ BSME & BSIE 0 20 40 60

  10. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Energetic materials that include nano-scale aluminum (Al and joined the faculty in the Mechanical Engineering Department at Texas Tech University in 2000 Pantoya Dept. of Mechanical Engineering Texas Tech University April 19, 2013 at 1:30pm in LSE 106 School

  11. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The presentation will first review emerging joint time in Mechanical Engineering and Engineering Science from the Technical University in Athens, Greece and his, vehicle engineering, bio-mechanics, and composite materials. He is Editor-in-Chief of the International

  12. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The state of the art in Quantification of Margin and UncertaintyD in Engineering Mechanics from the University of Wisconsin in 1978. He then worked in research laboratories of the University of Wisconsin as a Senior Scientist. In March of this year, he joined the Mechanical Engineering

  13. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar From Jumping Drops to Thermal Diodes Abstract Scholar and Assistant Professor of Mechanical Engineering and Materials Science at Duke University since.D. degree in Mechanical Engineering from Stanford University (2004). Dr. Chen is a recipient of numerous

  14. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar Some Forward-Looking Assistive Devices to Improve. Biosketch Michael Goldfarb, PhD, is the H. Fort Flowers Professor of Mechanical Engineering and the director in Mechanical Engineering from the University of Arizona in 1988, and received his SM and PhD degrees

  15. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar Plasma Actuators for Aerodynamic Flow Control.D. in Mechanical Engineering from The Ohio State University in 2004, 2005 and 2010 respectively. He joined the Department of Aerospace and Mechanical Engineering at the University of Arizona in 2010 as an Assistant

  16. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The atomization of a liquid jet by a high speed cross.S.E. degree in mechanical engineering from Amirkabir University of Technology in 2006 and M.S. degree in mechanical engineering from Sharif University of Technology in 2009. He is currently a Ph.D. candidate

  17. Introduction to Quantum Mechanics

    E-Print Network [OSTI]

    Eduardo J. S. Villaseñor

    2008-04-23

    The purpose of this contribution is to give a very brief introduction to Quantum Mechanics for an audience of mathematicians. I will follow Segal's approach to Quantum Mechanics paying special attention to algebraic issues. The usual representation of Quantum Mechanics on Hilbert spaces is also discussed.

  18. Mechanical Systems Signal Processing

    E-Print Network [OSTI]

    Carvalho, João B.

    , Northern Illinois University, DeKalb, IL 60115, USA c Department of Mechanical Engineering & VibrationMechanical Systems and Signal Processing Mechanical Systems and Signal Processing 21 (2007) 2715 Federal de Rio Grande do Sul, Brazil b Department of Mathematical Sciences & Vibration and Acoustic Center

  19. Mechanical seal assembly

    DOE Patents [OSTI]

    Kotlyar, Oleg M. (Salt Lake City, UT)

    2002-01-01

    An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transfering it to the mechanical diode.

  20. Mechanical seal assembly

    DOE Patents [OSTI]

    Kotlyar, Oleg M. (Salt Lake City, UT)

    2001-01-01

    An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transferring it to the mechanical diode.

  1. On the foundation of Mechanics

    E-Print Network [OSTI]

    Ricardo J. Alonso-Blanco; Jesús Muñoz-Díaz

    2014-12-09

    This note is an extended version of "A note on the foundations of Mechanics", arXiv: 1404.1321 [math-ph]. A presentation of its contents was given in a talk in memorial homage to the professor Juan B. Sancho Guimer\\'a. For this reason, it was written in spanish language. The matter of the note is a systematic foundation of the most classical part of Mechanics. The content by sections is: 0) Notions and basic results, 1) Conservative systems 2) Time. Time constraints, 3) Proper time. Relativistic forces, 4) Electromagnetic fields, 5) On the Hamilton-Noether Principle, 6) Schr\\"odinger equation.

  2. Introduction to continuum mechanics for engineers 

    E-Print Network [OSTI]

    Bowen, Ray M.

    1989-01-01

    This textbook is intended to introduce engineering graduate students to the essentials of modern Continuum Mechanics. The objective of an introductory course is to establish certain classical continuum models within a modern framework. Engineering...

  3. 2T Physics and Quantum Mechanics

    E-Print Network [OSTI]

    W. Chagas-Filho

    2008-02-20

    We use a local scale invariance of a classical Hamiltonian and describe how to construct six different formulations of quantum mechanics in spaces with two time-like dimensions. All these six formulations have the same classical limit described by the same Hamiltonian. One of these formulations is used as a basis for a complementation of the usual quantum mechanics when in the presence of gravity.

  4. Mechanical Properties of Nanocrystal Supercrystals

    E-Print Network [OSTI]

    Tam, Enrico

    2010-01-01

    and Its Impact on Mechanical Properties. MacromoleculesO. L. ; Minor, A. M. , Mechanical annealing and source-Mechanical Properties of Nanocrystal Supercrystals Enrico

  5. Statistical mechanics of the cytoskeleton

    E-Print Network [OSTI]

    Wang, Shenshen

    2012-01-01

    mechanics . . . . . . . . . . . . . . . . . . . . . . 2.1bottom-up approach to cell mechanics. Nat. Phys. [6] Fabry,Wolynes, P. G. Statistical mechanics of a cat’s cradle. New

  6. Hard Evidence and Mechanism Design

    E-Print Network [OSTI]

    Watson, Joel; Bull, Jesse

    2006-01-01

    J. , 2003. Contract, mechanism design, and technologicalSeverinov, S. , 2001. Mechanism design and communicationveri?able information and mechanism design. Rev. Econ. Stud.

  7. Hard Evidence and Mechanism Design

    E-Print Network [OSTI]

    Bull, J; Watson, J

    2007-01-01

    J. , 2003. Contract, mechanism design, and technologicalSeverinov, S. , 2001. Mechanism design and communicationveri?able information and mechanism design. Rev. Econ. Stud.

  8. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering The development of high-energy storage devices has been one in portable electronic devices, satellites, and electric vehicles. Silicon (Si) is an attractive anode

  9. Structural Mechanics & Solid Mechanics A finite element toolbox to MATLAB

    E-Print Network [OSTI]

    Ehrhardt, Matthias

    Structural Mechanics & Solid Mechanics Department of Mechanics and Materials CALFEM A finite.3 Copyright © 1999 by Structural Mechanics, LTH, Sweden. Printed by JABE Offset, Lund, Sweden. ISRN LUTVDG/TVSM--99/9001--SE (1-265) ISSN 0281-6679 Department of Mechanics and Materials Structural Mechanics #12;The

  10. Quantum mechanics: last stop for reductionism

    E-Print Network [OSTI]

    Gabriele Carcassi

    2012-03-16

    The state space of a homogeneous body is derived under two different assumptions: infinitesimal reducibility and irreducibility. The first assumption leads to a real vector space, used in classical mechanics, while the second one leads to a complex vector space, used in quantum mechanics.

  11. Mechanical Engineering Department Seminar Series

    E-Print Network [OSTI]

    Awtar, Shorya

    Mechanical Engineering Department Seminar Series Mechanics of a Mosquito Professor of Mechanical Engineering Clemson University Tuesday, March 24, 2015 4:00 ­ 5:00 pm Room 1303 EECS Abstract: The mechanics of a fascicle insertion into the skin

  12. MECHANICAL ENGINEERING Program of Study

    E-Print Network [OSTI]

    Thomas, Andrew

    MECHANICAL ENGINEERING Program of Study Correspondence The Department of Mechanical Engineering offers graduate programs in the fields of thermal science and engineering mechanics. Current areas of research activity include Biomedical Engineering, Biomimetics, Composite Materials, Computational Mechanics

  13. Seesaw mechanism and leptogenesis

    E-Print Network [OSTI]

    D. Falcone

    2006-12-05

    A brief overview of the phenomenology related to the seesaw mechanism and the baryogenesis via leptogenesis is presented. In particular, it is explained how large but not maximal lepton mixing can be achieved within the type II seesaw mechanism. Moreover, the consequences for leptogenesis are explored, including flavor effects.

  14. Geometrization of Quantum Mechanics

    E-Print Network [OSTI]

    J. F. Carinena; J. Clemente-Gallardo; G. Marmo

    2007-03-23

    We show that it is possible to represent various descriptions of Quantum Mechanics in geometrical terms. In particular we start with the space of observables and use the momentum map associated with the unitary group to provide an unified geometrical description for the different pictures of Quantum Mechanics. This construction provides an alternative to the usual GNS construction for pure states.

  15. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering It is a new beginning for innovative fundamental and applied and energy applications. Dr. Mark A. Tschopp is a materials engineer at the U.S. Army Research Laboratory and Mechanical Properties Mark Tschopp Materials Engineer U.S. Army Research Laboratory September 12, 2014 at 1

  16. Mechanical Systems Signal Processing

    E-Print Network [OSTI]

    Ray, Asok

    Mechanical Systems and Signal Processing Mechanical Systems and Signal Processing 21 (2007) 866 and analytical models. This paper attempts to address this inadequacy by taking advantage of advanced signal processing and pattern recognition tools. Since a vast majority of structural components that are prone

  17. Mechanical code comparator

    DOE Patents [OSTI]

    Peter, Frank J. (Albuquerque, NM); Dalton, Larry J. (Bernalillo, NM); Plummer, David W. (Albuquerque, NM)

    2002-01-01

    A new class of mechanical code comparators is described which have broad potential for application in safety, surety, and security applications. These devices can be implemented as micro-scale electromechanical systems that isolate a secure or otherwise controlled device until an access code is entered. This access code is converted into a series of mechanical inputs to the mechanical code comparator, which compares the access code to a pre-input combination, entered previously into the mechanical code comparator by an operator at the system security control point. These devices provide extremely high levels of robust security. Being totally mechanical in operation, an access control system properly based on such devices cannot be circumvented by software attack alone.

  18. 07SCHOOL OF MECHANICAL ENGINEERING

    E-Print Network [OSTI]

    Dimitrova, Vania

    07SCHOOL OF MECHANICAL ENGINEERING UNDERGRADUATE DEGREES School of Mechanical Engineering FACULTY OF ENGINEERING Undergraduate Degrees 2015 #12;www.engineering.leeds.ac.uk/mechanical UNDERGRADUATE DEGREES SCHOOL OF MECHANICAL ENGINEERING The School of Mechanical Engineering offers both a broad mechanical engineering degree

  19. Overview of Bohmian Mechanics

    E-Print Network [OSTI]

    Xavier Oriols; Jordi Mompart

    2013-01-09

    This chapter provides a comprehensive overview of the Bohmian formulation of quantum mechanics. It starts with a historical review of the difficulties found by Louis de Broglie, David Bohm, and John S. Bell to convince the scientific community about the validity and utility of Bohmian mechanics. Then, a formal explanation of Bohmian mechanics for nonrelativistic, single-particle quantum systems is presented. The generalization to many-particle systems, where the exchange interaction and the spin play an important role, is also presented. After that, the measurement process in Bohmian mechanics is discussed. It is emphasized that Bohmian mechanics exactly reproduces the mean value and temporal and spatial correlations obtained from the standard, that is the Copenhagen or orthodox, formulation. The ontological characteristics of Bohmian mechanics provide a description of measurements as another type of interaction without the need for introducing the wave function collapse. Several solved problems are presented at the end of the chapter, giving additional mathematical support to some particular issues. A detailed description of computational algorithms to obtain Bohmian trajectories from the numerical solution of the Schrodinger or the Hamilton-Jacobi equations are presented in an appendix. The motivation of this chapter is twofold: first, as a didactic introduction to Bohmian formalism, which is used in the subsequent chapters, and second, as a self-contained summary for any newcomer interested in using Bohmian mechanics in his or her daily research activity.

  20. Electronic door locking mechanism

    DOE Patents [OSTI]

    Williams, G.L.; Kirby, P.G.

    1997-10-21

    The invention is a motorized linkage for engaging a thumb piece in a door mechanism. The device has an exterior lock assembly with a small battery cell and combination lock. Proper entry by a user of a security code allows the battery to operate a small motor within the exterior lock assembly. The small motor manipulates a cam-plunger which moves an actuator pin into a thumb piece. The user applies a force on to the thumb piece. This force is transmitted by the thumb piece to a latch engagement mechanism by the actuator pin. The latch engagement mechanism operates the door latch. 6 figs.

  1. Quantum Mechanics Without Observers

    E-Print Network [OSTI]

    W. H. Sulis

    2013-03-03

    The measurement problem and the role of observers have plagued quantum mechanics since its conception. Attempts to resolve these have introduced anthropomorphic or non-realist notions into physics. A shift of perspective based upon process theory and utilizing methods from combinatorial games, interpolation theory and complex systems theory results in a novel realist version of quantum mechanics incorporating quasi-local, nondeterministic hidden variables that are compatible with the no-hidden variable theorems and relativistic invariance, and reproduce the standard results of quantum mechanics to a high degree of accuracy without invoking observers.

  2. Electronic door locking mechanism

    DOE Patents [OSTI]

    Williams, Gary Lin (428 E. Third Ave., Kennewick, WA 99336); Kirby, Patrick Gerald (1010 W. Fifteenth Pl., Kennewick, WA 99337)

    1997-01-01

    The invention is a motorized linkage for engaging a thumb piece in a door mechanism. The device has an exterior lock assembly with a small battery cell and combination lock. Proper entry by a user of a security code allows the battery to operate a small motor within the exterior lock assembly. The small motor manipulates a cam-plunger which moves an actuator pin into a thumb piece. The user applies a force on to the thumb piece. This force is transmitted by the thumb piece to a latch engagement mechanism by the actuator pin. The latch engagement mechanism operates the door latch.

  3. Rotary mechanical latch

    DOE Patents [OSTI]

    Spletzer, Barry L.; Martinez, Michael A.; Marron, Lisa C.

    2012-11-13

    A rotary mechanical latch for positive latching and unlatching of a rotary device with a latchable rotating assembly having a latching gear that can be driven to latched and unlatched states by a drive mechanism such as an electric motor. A cam arm affixed to the latching gear interfaces with leading and trailing latch cams affixed to a flange within the drive mechanism. The interaction of the cam arm with leading and trailing latch cams prevents rotation of the rotating assembly by external forces such as those due to vibration or tampering.

  4. Mechanical Engineering Achievement Awards 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    In this research, least-squares based finite element formulations and their applications in fluid mechanics are presented. Least-squares formulations offer several computational and theoretical advantages for Newtonian as ...

  5. Mechanics in medicine

    E-Print Network [OSTI]

    Bao, Gang

    Over decades, the theoretical and applied mechanics community has developed sophisticated approaches for analysing the behaviour of complex engineering systems. Most of these approaches have targeted systems in the ...

  6. Ultralight, ultrastiff mechanical metamaterials

    E-Print Network [OSTI]

    Zheng, Xiaoyu

    The mechanical properties of ordinary materials degrade substantially with reduced density because their structural elements bend under applied load. We report a class of microarchitected materials that maintain a nearly ...

  7. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    this chemistry in CFD codes. Finally, I will consider three different applications: ignition by a hot surface) and combustion. Guillaume Blanquart is an Assistant Professor in the Mechanical and Civil Engineering department

  8. Boosted Statistical Mechanics

    E-Print Network [OSTI]

    Massimo Testa

    2015-07-30

    Based on the fundamental principles of Relativistic Quantum Mechanics, we give a rigorous, but completely elementary, proof of the relation between fundamental observables of a statistical system when measured relatively to two inertial reference frames, connected by a Lorentz transformation.

  9. Failure mechanisms in MEMS.

    SciTech Connect (OSTI)

    Walraven, Jeremy Allen

    2003-07-01

    MEMS components by their very nature have different and unique failure mechanisms than their macroscopic counterparts. This paper discusses failure mechanisms observed in various MEMS components and technologies. MEMS devices fabricated using bulk and surface micromachining process technologies are emphasized. MEMS devices offer uniqueness in their application, fabrication, and functionality. Their uniqueness creates various failure mechanisms not typically found in their bulk or IC counterparts. In ICs, electrical precautions are taken to mitigate failure. In MEMS, both electrical and mechanical precautions must be enacted to reduce the risk of failure and increased reliability. Unlike ICs, many MEMS components are designed to interact with their environment, making the fabrication, testing, and packaging processes critical for the success of the device.

  10. Renewable Auction Mechanism (RAM)

    Broader source: Energy.gov [DOE]

    The Renewable Auction Mechanism (RAM), approved by the California Public Utilities Commission (CPUC) in December 2010, is expected to result in 1,299 megawatts (MW) of new distributed generation ...

  11. Is Fresnel Optics Quantum Mechanics in Phase Space?

    E-Print Network [OSTI]

    O. Crasser; H. Mack; W. P. Schleich

    2004-02-17

    We formulate and argue in favor of the following conjecture: There exists an intimate connection between Wigner's quantum mechanical phase space distribution function and classical Fresnel optics.

  12. Time in quantum mechanics 

    E-Print Network [OSTI]

    Chapin, Kimberly R.

    1997-01-01

    TIME IN QUANTUM MECHANICS A Thesis by KIMBERLY R. CHAPIN Submitted to Texas A8M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: Marian O. Scully (Chair... of Committee) Edward S. Fry (Member) aan Laane (Member) Thomas W. Adair, III (Head of Department) August 1997 Major Subject: Physics TIME IN QIJANTUM MECHANICS A Thesis by KIMBERLY R. CHAPIN Submitted to the Oflice of Graduate Studies of Texas A...

  13. Phase Field Fracture Mechanics.

    SciTech Connect (OSTI)

    Robertson, Brett Anthony

    2015-11-01

    For this assignment, a newer technique of fracture mechanics using a phase field approach, will be examined and compared with experimental data for a bend test and a tension test. The software being used is Sierra Solid Mechanics, an implicit/explicit finite element code developed at Sandia National Labs in Albuquerque, New Mexico. The bend test experimental data was also obtained at Sandia Labs while the tension test data was found in a report online from Purdue University.

  14. 126 MECHANICAL ENGINEERING Department of Mechanical Engineering (MEE)

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    126 MECHANICAL ENGINEERING Department of Mechanical Engineering (MEE) Acting Chair: Kyuil Kim professor, Ph.D., P.E., University of Dayton Master of Science in Mechanical Engineering The Department of Mechanical Engineering offers a program leading to the M.S. in mechanical engineering. The program

  15. Mechanical Engineering Is Mechanical Engineering right for me?

    E-Print Network [OSTI]

    Martin, Ralph R.

    Mechanical Engineering Is Mechanical Engineering right for me? If you are interested in the wide range of principles related to mechanical systems then Mechanical Engineering is well suited to you. A Mechanical Engineering degree programme will focus on aspects such as analysis, design, manufacture

  16. The Role of Micro-Mechanics in Soil Mechanics

    E-Print Network [OSTI]

    Bolton, Malcolm

    The Role of Micro-Mechanics in Soil Mechanics M.D.Bolton CUED/D-Soils/TR313 September 2000;1 The Role of Micro-Mechanics in Soil Mechanics Malcolm Bolton Summary It is suggested that observations of the changing microstructure of soils will permit the selection and refinement of relevant micro-mechanisms

  17. Mechanical locks Some of you may have a mechanical

    E-Print Network [OSTI]

    Shoubridge, Eric

    Mechanical locks Some of you may have a mechanical combination style lock securing your office. We collected and returned, and · codes to mechanical locks changed. REDUCE YOUR RISK OF THEFT REGARDING CASH

  18. Quantum Techniques for Stochastic Mechanics

    E-Print Network [OSTI]

    John C. Baez; Jacob Biamonte

    2015-10-22

    Some ideas from quantum theory are just beginning to percolate back to classical probability theory. For example, there is a widely used and successful theory of "chemical reaction networks", which describes the interactions of molecules in a stochastic rather than quantum way. Computer science and population biology use the same ideas under a different name: "stochastic Petri nets". But if we look at these theories from the perspective of quantum theory, they turn out to involve creation and annihilation operators, coherent states and other well-known ideas - but in a context where probabilities replace amplitudes. We explain this connection as part of a detailed analogy between quantum mechanics and stochastic mechanics. We use this analogy to present new proofs of two major results in the theory of chemical reaction networks: the deficiency zero theorem and the Anderson-Craciun-Kurtz theorem. We also study the overlap of quantum mechanics and stochastic mechanics, which involves Hamiltonians that can generate either unitary or stochastic time evolution. These Hamiltonians are called "Dirichlet forms", and they arise naturally from electrical circuits made only of resistors.

  19. Entangled Mechanical Oscillators

    E-Print Network [OSTI]

    J. D. Jost; J. P. Home; J. M. Amini; D. Hanneke; R. Ozeri; C. Langer; J. J. Bollinger; D. Leibfried; D. J. Wineland

    2009-01-29

    Hallmarks of quantum mechanics include superposition and entanglement. In the context of large complex systems, these features should lead to situations like Schrodinger's cat, which exists in a superposition of alive and dead states entangled with a radioactive nucleus. Such situations are not observed in nature. This may simply be due to our inability to sufficiently isolate the system of interest from the surrounding environment -- a technical limitation. Another possibility is some as-of-yet undiscovered mechanism that prevents the formation of macroscopic entangled states. Such a limitation might depend on the number of elementary constituents in the system or on the types of degrees of freedom that are entangled. One system ubiquitous to nature where entanglement has not been previously demonstrated is distinct mechanical oscillators. Here we demonstrate deterministic entanglement of separated mechanical oscillators, consisting of the vibrational states of two pairs of atomic ions held in different locations. We also demonstrate entanglement of the internal states of an atomic ion with a distant mechanical oscillator.

  20. Computer Vision in Fluid Mechanics

    E-Print Network [OSTI]

    Aminfar, AmirHessam

    2015-01-01

    layers," Journal of Fluid Mechanics, vol. 30, no. 04, pp.M. Princevac, "Fundamental fluid mechanics," 2014. C. W.Computer Vision in Fluid Mechanics A Thesis submitted in

  1. Continuous Improvement Plan Mechanical Engineering

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Continuous Improvement Plan Mechanical Engineering Undergraduate Curriculum #12;Plan for the Assessment and Continuous Improvement of the Mechanical Engineering Undergraduate Curriculum Department of Ocean and Mechanical Engineering Florida Atlantic University April 4, 2001 (latest modification 3

  2. STATISTICAL MECHANICS AND FIELD THEORY

    E-Print Network [OSTI]

    Samuel, S.A.

    2010-01-01

    1. L. 1. Schiff, Quantum Mechanics, third edition (McGraw-two-dimensional quantum mechanics problem vith a potential,Theory Methods to Statistical Mechanics Chapter I The Use of

  3. Waldyr Muniz Oliva Geometric Mechanics

    E-Print Network [OSTI]

    Natário, José

    Waldyr Muniz Oliva Geometric Mechanics February 1, 2002 Springer Berlin Heidelberg New mechanics : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 51 4.1 Galilean space-time structure and Newton equations . . . . . . . . 51 4.2 Critical remarks on Newtonian mechanics

  4. Computer Vision in Fluid Mechanics

    E-Print Network [OSTI]

    Aminfar, AmirHessam

    2015-01-01

    layers," Journal of Fluid Mechanics, vol. 30, no. 04, pp.Fundamental fluid mechanics," 2014. C. W. Enderlin, "MacroComputer Vision in Fluid Mechanics A Thesis submitted in

  5. EROSION MECHANISM IN DUCTILE METALS

    E-Print Network [OSTI]

    Bellman Jr., Robert

    2013-01-01

    England. Mayvflle, fL A. , "Mechanism of fV1aterial RemovalSubmitted to WEAR EROSION MECHANISM IN DUCTILE METALS Robertmetals. ace and erosion rate mechanism is a signifi- mic in

  6. A chemiosmotic mechanism of symport

    E-Print Network [OSTI]

    Kaback, HR

    2015-01-01

    HR (2003) Probing the mechanism of a membrane transportGJ, Kaback HR (1979) Mechanism of lactose translocation inDE, Kaback HR (1979) Mechanism of lactose translocation in

  7. Mechanisms in knockout reactions

    E-Print Network [OSTI]

    D. Bazin; R. J. Charity; R. T. de Souza; M. A. Famiano; A. Gade; V. Henzl; D. Henzlova; S. Hudan; J. Lee; S. Lukyanov; W. G. Lynch; S. McDaniel; M. Mocko; A. Obertelli; A. M. Rogers; L. G. Sobotka; J. R. Terry; J. A. Tostevin; M. B. Tsang; M. S. Wallace

    2009-02-16

    We report on the first detailed study of the mechanisms involved in knockout reactions, via a coincidence measurement of the residue and fast proton in one-proton knockout reactions, using the S800 spectrograph in combination with the HiRA detector array at the NSCL. Results on the reactions $^9$Be($^9$C,$^8$B+X)Y and $^9$Be($^8$B,$^7$Be+X)Y are presented. They are compared with theoretical predictions for both the diffraction and stripping reaction mechanisms, as calculated in the eikonal model. The data shows a clear distinction between the two reaction mechanisms, and the observed respective proportions are very well reproduced by the reaction theory. This agreement supports the results of knockout reaction analyses and their applications to the spectroscopy of rare isotopes.

  8. Transformable topological mechanical metamaterials

    E-Print Network [OSTI]

    D. Zeb Rocklin; Shangnan Zhou; Kai Sun; Xiaoming Mao

    2015-10-21

    Mechanical metamaterials are engineered materials that gain their remarkable mechanical properties, such as negative Poisson's ratios, negative compressibility, phononic bandgaps, and topological phonon modes, from their structure rather than composition. Here we propose a new design principle, based on a uniform soft deformation of the whole structure, to allow metamaterials to be immediately and reversibly transformed between states with contrasting mechanical and acoustic properties. These properties are protected by the topological structure of the phonon band of the whole structure and are thus highly robust against disorder and noise. We discuss the general classification of all structures that exhibit such soft deformations, and provide specific examples to demonstrate how to utilize soft deformations to transform a system between different regimes such that remarkable changes in their properties, including edge stiffness and speed of sound, can be achieved.

  9. Utilizing Mechanical Strain to Mitigate the Intrinsic Loss Mechanisms in Oscillating Metal Nanowires

    E-Print Network [OSTI]

    Park, Harold S.

    Utilizing Mechanical Strain to Mitigate the Intrinsic Loss Mechanisms in Oscillating Metal 21 November 2008) We utilize classical molecular dynamics to study energy dissipation (the Q factors [3], and many other applications [4]. Operationally, these nanowire-based NEMS utilize the nanowire

  10. Experimental unsaturated soil mechanics

    E-Print Network [OSTI]

    Delage, Pierre

    2008-01-01

    In this general report, experimental systems and procedures of investigating the hydro-mechanical behaviour of unsaturated soils are presented. The water retention properties of unsaturated soils are commented and linked to various physical parameters and properties of the soils. Techniques of controlling suction are described together with their adaptation in various laboratory testing devices. Some typical features of the mechanical behaviour of unsaturated soils are presented within an elasto-plastic framework. An attempt to describe the numerous and significant recent advances in the investigation of the behaviour of unsaturated soils, including the contributions to this Conference, is proposed.

  11. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mechanical Behavior of Indium Nanostructures Mechanical Behavior of Indium Nanostructures Print Wednesday, 26 May 2010 00:00 Indium is a key material in lead-free solder...

  12. Quantum Mechanics and Black Holes

    E-Print Network [OSTI]

    Jose N. Pecina-Cruz

    2005-11-27

    This paper discusses the existence of black holes from the foundations of quantum mechanics. It is found that quantum mechanics rule out a possible gravitational collapse.

  13. MECHANICAL ENGINEERING 121 Department of Mechanical Engineering (MEE)

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    MECHANICAL ENGINEERING 121 Department of Mechanical Engineering (MEE) *Available for general education credit. The Department of Mechanical Engineering offers an upper- division curriculum which leads to a B.S. in mechanical engineering. The curriculum is based on a strong foundation of fundamental

  14. 114 MECHANICAL ENGINEERING Department of Mechanical Engineering (MEE)

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    114 MECHANICAL ENGINEERING Department of Mechanical Engineering (MEE) *Available for general education credit. The Department of Mechanical Engineering offers an upper- division curriculum which leads to a B.S. in mechanical engineering. The curriculum is based on a strong foundation of fundamental

  15. Mechanism Design for an Agnostic Planner: universal mechanisms, logarithmic equilibrium

    E-Print Network [OSTI]

    Cvitanic, Jaksa

    Mechanism Design for an Agnostic Planner: universal mechanisms, logarithmic equilibrium payoffs consider the problem of Bayesian mechanism design when the respondents share a com- mon prior about which concerned with the first issue, which connects our results to the literature on robust mechanism design

  16. Program Transformation Mechanics A Classification of Mechanisms for Program Transformation

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Program Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing Transformation Systems Jonne van Wijngaarden Eelco Visser UU-CS-2003-048 Institute Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing

  17. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Reisslein, Martin

    conductivity. Coupled with its low thermal conductivity, polymer thermoelectric composites are attractive and thermoelectric applications. I will show that the thermal conductivity of ultra-thin polymer films can both conductivity and phonon transport mechanisms over the past 2 decades, owing much to the challenging needs

  18. Journal of applied mechanics

    E-Print Network [OSTI]

    Nov 11, 2009 ... Location: Engineering (Periodicals) ... wave propagation in such systems is examined in reference (4). Gassman (5, 6) has ... Now Research Scientist at Missile. Systems ... Presented at the Applied Mechanics Division Summer Conference,. Berkeley ..... This will be true in some cases for a water- saturated ...

  19. Residential Mechanical Precooling

    SciTech Connect (OSTI)

    German, a.; Hoeschele, M.

    2014-12-01

    This research conducted by the Alliance for Residential Building Innovation team evaluated mechanical air conditioner pre-cooling strategies in homes throughout the United States. EnergyPlus modeling evaluated two homes with different performance characteristics in seven climates. Results are applicable to new construction homes and most existing homes built in the last 10 years, as well as fairly efficient retrofitted homes.

  20. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    advantage over solar collectors that require tracking mechanisms to follow the sun and they can also capture and concentrating sunlight onto specially made collector tubes at the UC Solar Lab at UC Merced. The latest external CPC collector (XCPC) is being used in Mongolia and Dubai with great success. XCPC's offer a big cost

  1. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    and lithium ion batteries. Our interest is to understand how solid diffusion generates mechanical stresses in lithium batteries. Using input from ab initio and molecular dynamic simulations, we investigated to the presence of ionic fluxes. The second example is on the insertion of lithium into silicon in silicon anodes

  2. COVER IMAGE Mechanical metamaterials

    E-Print Network [OSTI]

    Loss, Daniel

    COVER IMAGE Mechanical metamaterials are artificial structures whose properties originate from a range of structural deformations. Letter p153; News & Views p95 IMAGE: JAYSON PAULOSE COVER DESIGN in elementary optical excitations of monolayer WSe2 Ajit Srivastava, Meinrad Sidler, Adrien V. Allain, Dominik S

  3. STUDENT HANDBOOK MECHANICAL ENGINEERING

    E-Print Network [OSTI]

    Krstic, Miroslav

    accredited programs) Aerospace and Mechanical Engineering: · An ability to apply knowledge of mathematics-long learning. · A knowledge of contemporary issues. · An ability to use modern engineering techniques, skills, and computing tools necessary for engineering practice. Additionally: Aerospace Engineering · Knowledge of key

  4. LABORATORY II MECHANICAL OSCILLATIONS

    E-Print Network [OSTI]

    Minnesota, University of

    Lab II - 1 LABORATORY II MECHANICAL OSCILLATIONS Most of the laboratory problems so far have was constant. In this set of laboratory problems, the total force acting on an object, and thus its's oscillation frequency. OBJECTIVES: After successfully completing this laboratory, you should be able to

  5. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Development of a deep water oil reservoir is a multi, pipelines, and export infrastructure). Maintaining flow (Flow Assurance) of the well fluids (oil, gas, water College. He obtained his Ph.D. in the field of Organic Chemistry from the University of North Carolina. He

  6. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    to these natural and manmade threats to the space environment. Dr. James N Head is Systems Engineer and InnovationMechanical & Aerospace Engineering More than any other country, the United States is reliant upon to solar events--has a demonstrated ability to disrupt high-frequency communications, jam GPS signals

  7. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar The Challenges of Renewable Energy Integration Integration Specialist in the Smart Grid Technologies and Strategy Division of the California Independent System Operator (California ISO). He has been with the grid operator of the world's 8th largest economy

  8. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    , a microgrid serving a large commercial building, and two building-scale PV arrays with storage. If well is Professor of Mechanical Engineering, and Director of the Center for Emerging Energy Technologies of energy systems, beginning with a project to refurbish and modernize the solar-assisted HVAC in the UNM

  9. Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical and Aerospace Engineering seminar On Wind Energy: A Fundamental Perspective Toward Understanding Wind Farms Underperformance abstract Although wind turbines have been well studied from a blade in order to maximize the energy that can be extracted from the available wind resource. Past investigations

  10. Mechanical & Aerospace Engineering

    E-Print Network [OSTI]

    Mechanical & Aerospace Engineering Wind power is the fastest growing non-fossil source of primary. As concern over CO2 emissions pushes society towards cleaner energy sources, the demand for wind power will continue to increase. Estimates of global wind energy potential range from 56 to 148 TW. These estimates

  11. Building Wings Mechanical Engineering

    E-Print Network [OSTI]

    Provancher, William

    & drawing ­ 15 minutes · Build wings ­ 120 minutes · Test wings in wind tunnel ­ 45 minutes Assessments · Screwdriver (the wind tunnel we used had a small screw to attach items to the testing platform) LessonBuilding Wings Mechanical Engineering Objective · Introduce students to the theory of Conservation

  12. Quantum Mechanical Pressure Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    Quantum Mechanical Pressure Frank Rioux CSB|SJU Quantum mechanics is based on the concept of wave it to its quantum mechanical equivalent. 2 2 2 2 2 p h KE m m = = Because objects with wave-like properties" character of quantum mechanical kinetic energy is the ultimate basis for the stability of matter. It also

  13. Mechanical Response of Cytoskeletal Networks

    E-Print Network [OSTI]

    Gardel, Margaret

    CHAPTER 19 Mechanical Response of Cytoskeletal Networks Margaret L. Gardel,* Karen E. Kasza, Cli Fluctuation Approaches B. In Vitro MT Networks C. Mechanics of Microtubules in Cells V. Intermediate Filament Networks A. Introduction B. Mechanics of IFs C. Mechanics of Networks VI. Conclusions and Outlook

  14. 5) Management ii) Mechanical methods

    E-Print Network [OSTI]

    Nowak, Robert S.

    5) Management c) Control ii) Mechanical methods = manually or mechanically damaging plants #12;5) Management c) Control ii) Mechanical methods Advantages · Generally much less public opposition #12;5) Management c) Control ii) Mechanical methods Advantages · Generally much less public opposition · Works well

  15. Mechanics of Materials and Structures

    E-Print Network [OSTI]

    Vaziri, Ashkan

    AND NUCLEAR MECHANICS Ashkan Vaziri, Arvind Gopinath and Vikram S. Deshpande Volume 2, Nº 6 June 2007 CONTINUUM-BASED COMPUTATIONAL MODELS FOR CELL AND NUCLEAR MECHANICS ASHKAN VAZIRI, ARVIND GOPINATH, nuclear mechanics, computational mechanics. This work has been supported by the Division of Engineering

  16. Incremental Mechanism Design Vincent Conitzer

    E-Print Network [OSTI]

    Incremental Mechanism Design Vincent Conitzer Duke University Department of Computer Science@cs.cmu.edu Abstract Mechanism design has traditionally focused almost exclusively on the design of truthful mechanisms bounded agents may not be able to find the best manipulation, and 3. when designing mechanisms

  17. QUANTUM MECHANICS II Physics 342

    E-Print Network [OSTI]

    Rosner, Jonathan L.

    QUANTUM MECHANICS II Physics 342 KPTC 103 9:00 ­ 10:20 a.m. 1 Tues., Thurs. ­ Winter Quarter 2011 quantum mechanics at the graduate level. The text for Quantum Mechanics II will be J. J. Sakurai and Jim Napolitano, Modern Quantum Mechanics, Second Edition (Addison-Wesley, San Francisco, 2011). For supplemental

  18. Bohmian Mechanics Detlef Durr1

    E-Print Network [OSTI]

    Goldstein, Sheldon

    Bohmian Mechanics Detlef D¨urr1 , Sheldon Goldstein2 , Roderich Tumulka3 , and Nino Zangh`i4, Via Dodecaneso 33, 16146 Genova, Italy. E-mail: zanghi@ge.infn.it #12;Bohmian mechanics is a theory mechanics, observers see the same statistics for experimental results as predicted by quantum mechanics

  19. How Minds Work Schema Mechanism

    E-Print Network [OSTI]

    Memphis, University of

    1 How Minds Work Schema Mechanism Stan Franklin Computer Science Division & Institute for Intelligent Systems The University of Memphis #12;HMW: Schema Mechanism 2 Schema Mechanism · Implements early stages of Piaget's theory of child development · A mechanism of mind · Controls a body

  20. Relational Quantum Mechanics

    E-Print Network [OSTI]

    Argyris Nicolaidis

    2012-11-09

    We suggest that the inner syntax of Quantum Mechanics is relational logic, a form of logic developed by C. S. Peirce during the years 1870 - 1880. The Peircean logic has the structure of category theory, with relation serving as an arrow (or morphism). At the core of the relational logical system is the law of composition of relations. This law leads to the fundamental quantum rule of probability as the square of an amplitude. Our study of a simple discrete model, extended to the continuum, indicates that a finite number of degrees of freedom can live in phase space. This "granularity" of phase space is determined by Planck's constant h. We indicate also the broader philosophical ramifications of a relational quantum mechanics.

  1. Mechanics of collective unfolding

    E-Print Network [OSTI]

    M Caruel; J. -M Allain; L Truskinovsky

    2015-01-07

    Mechanically induced unfolding of passive crosslinkers is a fundamental biological phenomenon encountered across the scales from individual macro-molecules to cytoskeletal actin networks. In this paper we study a conceptual model of athermal load-induced unfolding and use a minimalistic setting allowing one to emphasize the role of long-range interactions while maintaining full analytical transparency. Our model can be viewed as a description of a parallel bundle of N bistable units confined between two shared rigid backbones that are loaded through a series spring. We show that the ground states in this model correspond to synchronized, single phase configurations where all individual units are either folded or unfolded. We then study the fine structure of the wiggly energy landscape along the reaction coordinate linking the two coherent states and describing the optimal mechanism of cooperative unfolding. Quite remarkably, our study shows the fundamental difference in the size and structure of the folding-unfolding energy barriers in the hard (fixed displacements) and soft (fixed forces) loading devices which persists in the continuum limit. We argue that both, the synchronization and the non-equivalence of the mechanical responses in hard and soft devices, have their origin in the dominance of long-range interactions. We then apply our minimal model to skeletal muscles where the power-stroke in acto-myosin crossbridges can be interpreted as passive folding. A quantitative analysis of the muscle model shows that the relative rigidity of myosin backbone provides the long-range interaction mechanism allowing the system to effectively synchronize the power-stroke in individual crossbridges even in the presence of thermal fluctuations. In view of the prototypical nature of the proposed model, our general conclusions pertain to a variety of other biological systems where elastic interactions are mediated by effective backbones.

  2. Mechanics of dexterous manipulation 

    E-Print Network [OSTI]

    Zeng, Chang

    1991-01-01

    ) December 1991 ABSTRACT Mechanics of Dexterous Manipulation. (December 1991) Chang Zeng, B. S. , Fudan University, China Chair of Advisory Committee: Jeffrey C. Trinkle Given a system of bodies in contact, with some bodies rigidly controlled.... Any findings, conclusions, or recommen- dations expressed herein are those of the author and do not necessarily reflect the views of the National Science Foundation. vn TABLE OF CONTENTS CHAPTER Page I INTRODUCTION A. Motivation . B. Previous...

  3. Fibre bundle formulation of time-dependent mechanics

    E-Print Network [OSTI]

    G. Sardanashvily

    2013-03-07

    We address classical and quantum mechanics in a general setting of arbitrary time-dependent transformations. Classical non-relativistic mechanics is formulated as a particular field theory on smooth fibre bundles over a time axis. Connections on these bundles describe reference frames. Quantum time-dependent mechanics is phrased in geometric terms of Banach and Hilbert bundles and connections on these bundles. A quantization scheme speaking this language is leafwise geometric quantization.

  4. Relativistic viscoelastic fluid mechanics

    E-Print Network [OSTI]

    Masafumi Fukuma; Yuho Sakatani

    2011-09-01

    A detailed study is carried out for the relativistic theory of viscoelasticity which was recently constructed on the basis of Onsager's linear nonequilibrium thermodynamics. After rederiving the theory using a local argument with the entropy current, we show that this theory universally reduces to the standard relativistic Navier-Stokes fluid mechanics in the long time limit. Since effects of elasticity are taken into account, the dynamics at short time scales is modified from that given by the Navier-Stokes equations, so that acausal problems intrinsic to relativistic Navier-Stokes fluids are significantly remedied. We in particular show that the wave equations for the propagation of disturbance around a hydrostatic equilibrium in Minkowski spacetime become symmetric hyperbolic for some range of parameters, so that the model is free of acausality problems. This observation suggests that the relativistic viscoelastic model with such parameters can be regarded as a causal completion of relativistic Navier-Stokes fluid mechanics. By adjusting parameters to various values, this theory can treat a wide variety of materials including elastic materials, Maxwell materials, Kelvin-Voigt materials, and (a nonlinearly generalized version of) simplified Israel-Stewart fluids, and thus we expect the theory to be the most universal description of single-component relativistic continuum materials. We also show that the presence of strains and the corresponding change in temperature are naturally unified through the Tolman law in a generally covariant description of continuum mechanics.

  5. Mechanism Design for Fair Division: Allocating Divisible Items without Payments

    E-Print Network [OSTI]

    Cortes, Corinna

    A Mechanism Design for Fair Division: Allocating Divisible Items without Payments RICHARD COLE GOEL, Google Research, New York We revisit the classic problem of fair division from a mechanism design their valuations. For the very large class of homo- geneous valuations, we design a truthful mechanism

  6. Applied Bohmian Mechanics

    E-Print Network [OSTI]

    A. Benseny; G. Albareda; A. S. Sanz; J. Mompart; X. Oriols

    2014-10-20

    Bohmian mechanics provides an explanation of quantum phenomena in terms of point particles guided by wave functions. This review focuses on the formalism of non-relativistic Bohmian mechanics, rather than its interpretation. Although the Bohmian and standard quantum theories have different formalisms, both give exactly the same predictions for all phenomena. Fifteen years ago, the quantum chemistry community began to study the practical usefulness of Bohmian mechanics. Since then, the scientific community has mainly applied it to study the (unitary) evolution of single-particle wave functions, either by developing efficient quantum trajectory algorithms or by providing a trajectory-based explanation of complicated quantum phenomena. Here we present a large list of examples showing how the Bohmian formalism provides a useful solution in different forefront research fields for this kind of problems (where the Bohmian and the quantum hydrodynamic formalisms coincide). In addition, this work also emphasizes that the Bohmian formalism can be a useful tool in other types of (non-unitary and nonlinear) quantum problems where the influence of the environment or the global wave function are unknown. This review contains also examples on the use of the Bohmian formalism for the many-body problem, decoherence and measurement processes. The ability of the Bohmian formalism to analyze this last type of problems for (open) quantum systems remains mainly unexplored by the scientific community. The authors of this review are convinced that the final status of the Bohmian theory among the scientific community will be greatly influenced by its potential success in these type of problems that present non-unitary and/or nonlinear quantum evolutions. A brief introduction of the Bohmian formalism and some of its extensions are presented in the last part of this review.

  7. Fracture mechanics: 26. volume

    SciTech Connect (OSTI)

    Reuter, W.G.; Underwood, J.H.; Newman, J.C. Jr.

    1995-12-31

    The original objective of these symposia was to promote technical interchange between researchers from the US and worldwide in the field of fracture. This objective was recently expanded to promote technical interchange between researchers in the field of fatigue and fracture. The symposium began with the Swedlow Memorial Lecture entitled ``Patterns and Perspectives in Applied Fracture Mechanics.`` The remaining 42 papers are divided into the following topical sections: Constraint crack initiation; Constraint crack growth; Weldments; Engineered materials; Subcritical crack growth; Dynamic loading; and Applications. Papers within the scope of the Energy Data Base have been processed separately.

  8. Quantum jump mechanics

    E-Print Network [OSTI]

    A. Yu. Samarin

    2015-05-10

    The change with time of the system consisting of the quantum object and the macroscopic measuring instrument is described on the base of the uniform dynamic law, which is suitable both evolution and reduction processes description. It is the integral wave equation with kernel in the form of a path integral. It is shown, that wave function collapse is the specific transformation which is fundamentally differ from Shr\\"odinger's evolution. Specifically, a formal cause of the collapse is a local time derivative (infinite large) of the potential energy. Such transformation can not be described using mathematical apparatus of conventional quantum mechanics.

  9. Sandia Energy - Mechanical Testing

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)Geothermal Energy &Water Power& SF-BREEZEMaterials,Mechanical

  10. Cell Adhesion Mechanisms and Elasto-Viscoplastic Mechanics of Tumours

    E-Print Network [OSTI]

    Preziosi, Luigi

    Cell Adhesion Mechanisms and Elasto-Viscoplastic Mechanics of Tumours D. Ambrosi, L. Preziosi and deform while binding each other thanks to adhesion molecules exerting forces of measurable strength. In this paper it is illus- trated a macroscopic mechanical model of solid tumour which takes such adhesion

  11. Ankit Kalani Department of Mechanical

    E-Print Network [OSTI]

    Kandlikar, Satish

    Ankit Kalani Department of Mechanical Engineering & Microsystems Engineering, Rochester Institute of Technology, Rochester, NY 14623 e-mail: axk2161@rit.edu Satish G. Kandlikar1 Department of Mechanical

  12. Mechanical Engineering, University of Cincinnati,

    E-Print Network [OSTI]

    Liu, Yijun

    Y. J. Liu1 Mechanical Engineering, University of Cincinnati, Cincinnati, OH 45221-0072 e-mail: Yijun.Liu@uc.edu W. Ye Y. Deng Mechanical Engineering, Hong Kong University of Science and Technology

  13. Hard Evidence and Mechanism Design

    E-Print Network [OSTI]

    Bull, J; Watson, J

    2007-01-01

    for mechanism design. Thus, as Green and La?ont recognizedmechanism design. Second, we lend support to Green and La?by Green and La?ont (1986). Any setting of mechanism design

  14. STRUCTURAL ENGINEERING, MECHANICS AND MATERIALS

    E-Print Network [OSTI]

    Wang, Yuhang

    · Structural Health Monitoring · Structural Reliability Graduate Studies Structural Engineering, Mechanics sensing device for structural health monitoring and control. 3D finite element modeling and simulationSTRUCTURAL ENGINEERING, MECHANICS AND MATERIALS offers graduate instruction and research

  15. On Randomness in Quantum Mechanics

    E-Print Network [OSTI]

    Alberto C. de la Torre

    2007-07-19

    The quantum mechanical probability densities are compared with the probability densities treated by the theory of random variables. The relevance of their difference for the interpretation of quantum mechanics is commented.

  16. Xiangchun Xuan Department of Mechanical

    E-Print Network [OSTI]

    Xuan, Xiangchun "Schwann"

    Xiangchun Xuan Department of Mechanical Engineering, Clemson University, Clemson, SC, USA Received mechanics and heat/mass transfer. The primary focus is placed on the temperature-induced flow variations­liquid interface [13, 14]. Therefore, pumps, valves, and other mechanical moving parts are eliminated in electro

  17. Lecture notes Introductory fluid mechanics

    E-Print Network [OSTI]

    Malham, Simon J.A.

    Lecture notes Introductory fluid mechanics Simon J.A. Malham Simon J.A. Malham (15th September 2014 of fluid mechanics and along the way see lots of interesting applications. 2 Fluid flow, the Continuum are generally incompressible--a feature essential to all modern car braking mechanisms. Fluids can be further

  18. MASTER OF SCIENCE MECHANICAL ENGINEERING

    E-Print Network [OSTI]

    67 MASTER OF SCIENCE IN MECHANICAL ENGINEERING MODELING THE EFFECT OF CYCLING OF A LOCALIZED HEAT Guard B.S., University of California, Los Angeles, 1992 Master of Science in Mechanical Engineering-September 2001 Advisor: Ashok Gopinath, Department of Mechanical Engineering In this study,the finite element

  19. Stable Allocation Mechanism Mourad Baou

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    it has exactly one stable allocation). A mechanism is a function that selects exactly one stableStable Allocation Mechanism Mourad Baïou Michel Balinski Avril 2002 Cahier n° 2002-009 ECOLE,version1-6Feb2008 #12;Stable Allocation Mechanism Mourad Baïou1 Michel Balinski2 Avril 2002 Cahier n° 2002

  20. A Primer on Geometric Mechanics

    E-Print Network [OSTI]

    Christian Lessig

    2012-06-14

    Geometric mechanics is usually studied in applied mathematics and most introductory texts are hence aimed at a mathematically minded audience. The present note tries to provide the intuition of geometric mechanics and to show the relevance of the subject for an understanding of "mechanics".

  1. SOLID MECHANICS James R. Rice

    E-Print Network [OSTI]

    1 SOLID MECHANICS James R. Rice School of Engineering and Applied Sciences, and Department of Earth: February 2010 Downloadable at: http://esag.harvard.edu/rice/e0_Solid_Mechanics_94_10.pdf TABLE OF CONTENTS provided on last three pages, pp. 87-89 INTRODUCTION The application of the principles of mechanics to bulk

  2. Exploiting mechanical biomarkers in microfluidics

    E-Print Network [OSTI]

    Exploiting mechanical biomarkers in microfluidics Xiaole Maoa and Tony Jun Huang*b DOI: 10.1039/c2 mechanical biomarkers in microfluidic devices. This trend makes sense because microfluidic devices often of mechanical biomarker- based microfluidic applications. We believe that these examples are just the tip

  3. Michigan State University Department of Mechanical Engineering

    E-Print Network [OSTI]

    Feeny, Brian

    Michigan State University Department of Mechanical Engineering ENGINEERING MECHANICS CONCENTRATION of Eden of mathematics, for therein it bears its fruit." The engineering mechanics concentration for preparing students for graduate study in mechanical engineering or engineering mechanics. To complete

  4. Does Quantum Mechanics Make Sense?Does Quantum Mechanics Make Sense? Some relatively simple concepts show why the answer is yes.Some relatively simple concepts show why the answer is yes.

    E-Print Network [OSTI]

    Fayer, Michael D.

    Does Quantum Mechanics Make Sense?Does Quantum Mechanics Make Sense? Some relatively simple Classical Mechanics Quantum Mechanics Relative Absolute What does relative vs. absolute size mean?What does relative vs. absolute size mean? Why does it matter?Why does it matter? #12;Classical Mechanics

  5. PEBBLES Mechanics Simulation Speedup

    SciTech Connect (OSTI)

    Joshua J. Cogliati; Abderrafi M. Ougouag

    2010-05-01

    Pebble bed reactors contain large numbers of spherical fuel elements arranged randomly. Determining the motion and location of these fuel elements is required for calculating certain parameters of pebble bed reactor operation. These simulations involve hundreds of thousands of pebbles and involve determining the entire core motion as pebbles are recirculated. Single processor algorithms for this are insufficient since they would take decades to centuries of wall-clock time. This paper describes the process of parallelizing and speeding up the PEBBLES pebble mechanics simulation code. Both shared memory programming with the Open Multi-Processing API and distributed memory programming with the Message Passing Interface API are used in simultaneously in this process. A new shared memory lock-less linear time collision detection algorithm is described. This method allows faster detection of pebbles in contact than generic methods. These combine to make full recirculations on AVR sized reactors possible in months of wall clock time.

  6. Microfabricated therapeutic actuator mechanisms

    DOE Patents [OSTI]

    Northrup, Milton A. (Berkeley, CA); Ciarlo, Dino R. (Livermore, CA); Lee, Abraham P. (Walnut Creek, CA); Krulevitch, Peter A. (Los Altos, CA)

    1997-01-01

    Electromechanical microstructures (microgrippers), either integrated circuit (IC) silicon-based or precision machined, to extend and improve the application of catheter-based interventional therapies for the repair of aneurysms in the brain or other interventional clinical therapies. These micromechanisms can be specifically applied to release platinum coils or other materials into bulging portions of the blood vessels also known as aneurysms. The "micro" size of the release mechanism is necessary since the brain vessels are the smallest in the body. Through a catheter more than one meter long, the micromechanism located at one end of the catheter can be manipulated from the other end thereof. The microgripper (micromechanism) of the invention will also find applications in non-medical areas where a remotely actuated microgripper or similar actuator would be useful or where micro-assembling is needed.

  7. Rotary drive mechanism

    SciTech Connect (OSTI)

    Kenderdine, E.W.

    1991-10-08

    This patent describes a rotary drive mechanism which includes a rotary solenoid having a stator and multi-poled rotor. A moving member rotates with the rotor and is biased by a biasing device. The biasing device causes a further rotational movement after rotation by the rotary solenoid. Thus, energization of the rotary solenoid moves the member in one direction to one position and biases the biasing device against the member. Subsequently, de- energization of the rotary solenoid causes the biasing device to move the member in the same direction to another position from where the moving member is again movable by energization and de-energization of the rotary solenoid. Preferably, the moving member is a multi-lobed cam having the same number of lobes as the rotor has poles. An anti- overdrive device is also preferably provided for preventing overdrive in the forward direction or a reverse rotation of the moving member and for precisely aligning the moving member.

  8. Mechanisms in Impact Fragmentation

    E-Print Network [OSTI]

    Falk K. Wittel; Humberto A. Carmona; Ferenc Kun; Hans J. Herrmann

    2015-09-03

    The brittle fragmentation of spheres is studied numerically by a 3D Discrete Element Model. Large scale computer simulations are performed with models that consist of agglomerates of many spherical particles, interconnected by beam-truss elements. We focus on a detailed description of the fragmentation process and study several fragmentation mechanisms involved. The evolution of meridional cracks is studied in detail. These cracks are found to initiate in the inside of the specimen with quasi-periodic angular distribution and give a broad peak in the fragment mass distribution for large fragments that can be fitted by a two-parameter Weibull distribution. The results prove to be independent of the degree of disorder in the model, but mean fragment sizes scale with velocity. Our results reproduce many experimental observations of fragment shapes, impact energy dependence or mass distribution, and significantly improve the understanding of the fragmentation process for impact fracture since we have full access to the failure conditions and evolution.

  9. Microfabricated therapeutic actuator mechanisms

    DOE Patents [OSTI]

    Northrup, M.A.; Ciarlo, D.R.; Lee, A.P.; Krulevitch, P.A.

    1997-07-08

    Electromechanical microstructures (microgrippers), either integrated circuit (IC) silicon-based or precision machined, to extend and improve the application of catheter-based interventional therapies for the repair of aneurysms in the brain or other interventional clinical therapies. These micromechanisms can be specifically applied to release platinum coils or other materials into bulging portions of the blood vessels also known as aneurysms. The ``micro`` size of the release mechanism is necessary since the brain vessels are the smallest in the body. Through a catheter more than one meter long, the micromechanism located at one end of the catheter can be manipulated from the other end thereof. The microgripper (micromechanism) of the invention will also find applications in non-medical areas where a remotely actuated microgripper or similar actuator would be useful or where micro-assembling is needed. 22 figs.

  10. Rotary drive mechanism

    DOE Patents [OSTI]

    Kenderdine, Eugene W. (Albuquerque, NM)

    1991-01-01

    A rotary drive mechanism includes a rotary solenoid having a stator and multi-poled rotor. A moving member rotates with the rotor and is biased by a biasing device. The biasing device causes a further rotational movement after rotation by the rotary solenoid. Thus, energization of the rotary solenoid moves the member in one direction to one position and biases the biasing device against the member. Subsequently, de-energization of the rotary solenoid causes the biasing device to move the member in the same direction to another position from where the moving member is again movable by energization and de-energization of the rotary solenoid. Preferably, the moving member is a multi-lobed cam having the same number of lobes as the rotor has poles. An anti-overdrive device is also preferably provided for preventing overdrive in the forward direction or a reverse rotation of the moving member and for precisely aligning the moving member.

  11. Mechanics,Mechanisms and Modeling of the Chemical Mechanical Polishing Process

    E-Print Network [OSTI]

    Noh, Kyungyoon

    The Chemical Mechanical polishing (CMP) process is now widely employed in the Integrated Circuit Fabrication. However, due to the complexity of process parameters on the material removal rate (MRR), mechanism of material ...

  12. Entanglement Exchange and Bohmian Mechanics

    E-Print Network [OSTI]

    Nick Huggett; Tiziana Vistarini

    2009-05-25

    This paper analyses the phenomenon of entanglement exchange in Bohm's pilot wave interpretation of quantum mechanics. The interesting feature of the phenomenon is that systems become entangled without causal interaction; hence it is a useful situation for investigating the unique nature of interaction in Bohmian mechanics. The first two sections introduce, respectively, entanglement exchange in the standard interpretation of quantum mechanics, and the basic principles of Bohmian mechanics. The next section shows that the Bohmian interpretation makes the same experimental predictions about entanglement exchange as the standard one. The final section draws some conclusions about interactions and entanglement in Bohmian mechanics.

  13. Cracked-fuel mechanics. [PWR; BWR

    SciTech Connect (OSTI)

    Williford, R.E.; Lanning, D.D.

    1982-01-01

    This paper presents a modelling concept and a set of measurable parameters that have been shown to improve the prediction of the mechanical behavior of cracked fuel/cladding systems without added computational expense. The transition from classical annular gap/cylindrical pellet models to modified bulk properties and further to local behavior for cracked fuel systems is discussed. The results of laboratory experiments to verify these modelling parameters are shown. Data are also presented from laboratory experiments on unirradiated and irradiated rods which show that fuel rod mechanical response depends on fuel fragment size. The impact of these data on cracked fuel behavior and failure modelling is also discussed.

  14. Relativistic mechanism of superconductivity

    E-Print Network [OSTI]

    H. Y. Cui

    2002-12-17

    According to the theory of relativity, the relativistic Coulomb's force between an electron pair is composed of two parts, the main part is repulsive, while the rest part can be attractive in certain situations. Thus the relativistic attraction of an electron pair provides an insight into the mechanism of superconductivity. In superconductor, there are, probably at least, two kinds of collective motions which can eliminate the repulsion between two electrons and let the attraction being dominant, the first is the combination of lattice and electron gas, accounting for traditional superconductivity; the second is the electron gas themselves, accounting for high $T_c$ superconductivity. In usual materials, there is a good balance between the repulsion and attraction of an electron pair, the electrons are regarded as free electrons so that Fermi gas theory plays very well. But in some materials, when the repulsion dominates electron pairs, the electron gas will has a behavior opposite to superconductivity. In the present paper the superconducting states are discussed in terms of relativistic quantum theory in details, some significant results are obtained including quantized magnetic flux, London equation, Meissner effect and Josephson effect.

  15. Parallel GPU Algorithms for Mechanical CAD

    E-Print Network [OSTI]

    Krishnamurthy, Adarsh

    2010-01-01

    of California, Berkeley, Mechanical Engineering Department,GPU Algorithms for Mechanical CAD by Adarsh Krishnamurthy Aof Philosophy in Engineering - Mechanical Engineering in the

  16. Natural vs. mechanical ventilation and cooling.

    E-Print Network [OSTI]

    Brager, Gail; Alspach, Peter; Nall, Daniel H.

    2011-01-01

    and Americas Region Mechanical and Building Physics Skillsmixed mode, and low-energy mechanical design. w w w.rsesjouruse associated with mechanical ventila- tion and cooling,

  17. Electrical and Mechanical Properties of Graphene

    E-Print Network [OSTI]

    Bao, Wenzhong

    2011-01-01

    der Zande, P.L. McEuen, Mechanical properties of suspendedA. Bachtold, Imaging mechanical vibrations in suspendedPhani, Effective elastic mechanical properties of single

  18. MECHANICAL PROPERTIES OF POROUS PNZT POLYCRYSTALLINE CERAMICS

    E-Print Network [OSTI]

    Biswas, D.R.

    2010-01-01

    F. P. Knudsen, "Dependence of Mechanical Strength of BrittleMicrostruc- ture on the Mechanical Properties of Ceramics,"of Porosity on the Mechanical Properties of Lead Zirconate-

  19. Mechanical Behaviors of Alloys From First Principles

    E-Print Network [OSTI]

    Hanlumyuang, Yuranan

    2011-01-01

    Some Backgrounds on The Quantum Mechanical Stresses . . .3.2.2 The Quantum Mechanical Stresses and The Generalized3.2.3 Quantum-Mechanical

  20. Mechanical and Manufacturing Engineering Mechatronics Engineering Minor

    E-Print Network [OSTI]

    Mechanical and Manufacturing Engineering Mechatronics Engineering Minor Students pursuing a BSc in mechanical or manufacturing engineering have experience and entrepreneurship. Mechatronics is the synergistic combination of mechanical

  1. Mechanical design of the SNS MEBT

    E-Print Network [OSTI]

    Oshatz, D.; DeMello, A.; Doolittle, L.; Luft, P.; Staples, J.; Zachoszcz, A.

    2001-01-01

    LBNL-47343 MECHANICAL DESIGN OF THE SNS MEBT* D. Oshatz † ,unusually compact mechanical design. 1 PHYSICS REQUIREMENTSsignificant thermal and mechanical design challenges [2].

  2. Contract, Mechanism Design, and Technological Detail

    E-Print Network [OSTI]

    Watson, Joel

    2006-01-01

    Watson, J. , “Contract and Mechanism Design in Settings withDesign, Adjustment Processes, Mechanisms, and Institutions,”Optimal Coordination Mechanisms in Generalized Principal-

  3. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mechanical Behavior of Indium Nanostructures Print Indium is a key material in lead-free solder applications for microelectronics due to its excellent wetting properties, extended...

  4. INL '@work' heavy equipment mechanic

    SciTech Connect (OSTI)

    Christensen, Cad

    2008-01-01

    INL's Cad Christensen is a heavy equipment mechanic. For more information about INL careers, visit http://www.facebook.com/idahonationallaboratory.

  5. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to develop a fundamental understanding of this material's small-scale mechanical properties and reliability. Researchers from the University of Waterloo, California...

  6. THERMODYNAMICS AND MECHANISMS OF SINTERING

    E-Print Network [OSTI]

    Pask, J.A.

    2011-01-01

    E. Hoge and Joseph A. Pask, "Thermodynamics of So:!.id StateJoseph A. Pask, "Thermodynamics and Geometric Considerations8419 r- ,y / ( /)~; - - I THERMODYNAMICS AND MECHANISMS OF

  7. Unique Auxin Regulation Mechanism Discovered

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Unique Auxin Regulation Mechanism Discovered Print The plant hormone auxin regulates many plant growth and development processes, including shoot growth, root branching, fruit...

  8. INL '@work' heavy equipment mechanic

    ScienceCinema (OSTI)

    Christensen, Cad

    2013-05-28

    INL's Cad Christensen is a heavy equipment mechanic. For more information about INL careers, visit http://www.facebook.com/idahonationallaboratory.

  9. Department of Mechanical Engineering "From Compliant Mechanisms to

    E-Print Network [OSTI]

    Militzer, Burkhard

    in structural, mechanical, and electronic integration could lend themselves to advanced manufacturing techniques such as 3D printing with materials specialized in electro- mechanical sensing and actuation in addition Young Manufacturing Engineer Award from Society of Manufacturing Engineers, 1995; Boeing­A.D. Welliver

  10. Statistical Mechanics and Quantum Cosmology

    E-Print Network [OSTI]

    B. L. Hu

    1995-11-29

    Statistical mechanical concepts and processes such as decoherence, correlation, and dissipation can prove to be of basic importance to understanding some fundamental issues of quantum cosmology and theoretical physics such as the choice of initial states, quantum to classical transition and the emergence of time. Here we summarize our effort in 1) constructing a unified theoretical framework using techniques in interacting quantum field theory such as influence functional and coarse-grained effective action to discuss the interplay of noise, fluctuation, dissipation and decoherence; and 2) illustrating how these concepts when applied to quantum cosmology can alter the conventional views on some basic issues. Two questions we address are 1) the validity of minisuperspace truncation, which is usually assumed without proof in most discussions, and 2) the relevance of specific initial conditions, which is the prevailing view of the past decade. We also mention how some current ideas in chaotic dynamics, dissipative collective dynamics and complexity can alter our view of the quantum nature of the universe.

  11. A new introductory quantum mechanics curriculum

    E-Print Network [OSTI]

    Kohnle, Antje; Browne, Dan; Everitt, Mark; Fomins, Aleksejs; Kok, Pieter; Kulaitis, Gytis; Prokopas, Martynas; Raine, Derek; Swinbank, Elizabeth

    2013-01-01

    The Institute of Physics New Quantum Curriculum consists of freely available online learning and teaching materials (quantumphysics.iop.org) for a first course in university quantum mechanics starting from two-level systems. This approach immediately immerses students in inherently quantum mechanical aspects by focusing on experiments that have no classical explanation. It allows from the start a discussion of interpretive aspects of quantum mechanics and quantum information theory. This article gives an overview of the resources available at the IOP website. The core text is presented as around 80 articles co-authored by leading experts that are arranged in themes and can be used flexibly to provide a range of alternative approaches. Many of the articles include interactive simulations with accompanying activities and problem sets that can be explored by students to enhance their understanding. Much of the linear algebra needed for this approach is part of the resource. Solutions to activities are available ...

  12. Relativistic fluid mechanics, Kahler manifolds and supersymmetry

    E-Print Network [OSTI]

    T. S. Nyawelo; J. W. van Holten; S. Groot Nibbelink

    2003-09-11

    We propose an alternative for the Clebsch decomposition of currents in fluid mechanics, in terms of complex potentials taking values in a Kahler manifold. We reformulate classical relativistic fluid mechanics in terms of these complex potentials and rederive the existence of an infinite set of conserved currents. We perform a canonical analysis to find the explicit form of the algebra of conserved charges. The Kahler-space formulation of the theory has a natural supersymmetric extension in 4-D space-time. It contains a conserved current, but also a number of additional fields complicating the interpretation. Nevertheless, we show that an infinite set of conserved currents emerges in the vacuum sector of the additional fields. This sector can therefore be identified with a regime of supersymmetric fluid mechanics. Explicit expressions for the current and the density are obtained.

  13. MSME with depth in Fluid Mechanics The primary areas of fluid mechanics research at Michigan State University's Mechanical Engineering

    E-Print Network [OSTI]

    Feeny, Brian

    June 2006 MSME with depth in Fluid Mechanics The primary areas of fluid mechanics research Mechanics The MSME degree program for fluid mechanics is based around two graduate-level foundation courses offered through the Department of Mechanical Engineering (ME). These courses are ME 830 Fluid Mechanics I

  14. Mechanical Engineering Department 05 November 2014

    E-Print Network [OSTI]

    Furlong, Cosme

    Mechanical Engineering Department Lecture 03 05 November 2014 WORCESTER POLYTECHNIC INSTITUTE MECHANICAL ENGINEERING DEPARTMENT Optical Metrology and NDT ME-593L, B'2014 #12;Mechanical Engineering Possible longitudinal resonant modes (cavity length = L) #12;Mechanical Engineering Department Lasers

  15. Mechanical Engineering Department 03 November 2014

    E-Print Network [OSTI]

    Furlong, Cosme

    Mechanical Engineering Department Lecture 02 03 November 2014 WORCESTER POLYTECHNIC INSTITUTE MECHANICAL ENGINEERING DEPARTMENT Optical Metrology and NDT ME-593L, B'2014 #12;Mechanical Engineering Department Light Sources Electromagnetic spectrum #12;Mechanical Engineering Department Light Sources

  16. Department of Mechanical Engineering Undergraduate programmes

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    in one of five areas without giving up the breadth of knowledge needed by a practicing engineer. OurDepartment of Mechanical Engineering Undergraduate programmes Aerospace Engineering Automotive Engineering Mechanical Engineering Mechanical Engineering with Advanced Design & Innovation Mechanical

  17. Geometric Mechanics -Part I January 23, 2009

    E-Print Network [OSTI]

    Rink, Bob

    Geometric Mechanics - Part I Bob Rink January 23, 2009 Contents 1 Mechanical systems 4 1.1 Two Lagrangian mechanics 9 2.1 New position variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-Lagrange equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.4 Natural mechanical systems

  18. Quantum Mechanics and Representation Theory Columbia University

    E-Print Network [OSTI]

    Woit, Peter

    Quantum Mechanics and Representation Theory Peter Woit Columbia University Texas Tech, November 21 2013 Peter Woit (Columbia University) Quantum Mechanics and Representation Theory November 2013 1 / 30 #12;Does Anyone Understand Quantum Mechanics? "No One Understands Quantum Mechanics" "I think

  19. Mechanics of Materials and Structures

    E-Print Network [OSTI]

    Pellegrino, Sergio

    Journal of Mechanics of Materials and Structures A ZERO-STIFFNESS ELASTIC SHELL STRUCTURE Simon D publishers #12;JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES Vol. 6, No. 1-4, 2011 msp A ZERO-STIFFNESS ELASTIC SHELL STRUCTURE SIMON D. GUEST, ELIZBAR KEBADZE AND SERGIO PELLEGRINO A remarkable shell structure

  20. MASTER OF SCIENCE MECHANICAL ENGINEERING

    E-Print Network [OSTI]

    ;MECHANICAL ENGINEERING 70 REDUCTION OF MARINE GAS TURBINE EXHAUST INFRARED SIGNATURE Joseph D. Gombas radiation signature of the exhaust plume from a gas turbine powered ship. The concepts fell into three69 MASTER OF SCIENCE IN MECHANICAL ENGINEERING A PARAMETRIC DESIGN STUDY OF InGaAs MICRO

  1. Mechanical engineering COLLEGE of ENGINEERING

    E-Print Network [OSTI]

    Berdichevsky, Victor

    Mechanical engineering COLLEGE of ENGINEERING DepartmentofMechanicalEngineering CollegeofEngineering 5050AnthonyWayneDrive Detroit,MI48202 College of engineering t Educating future engineers for 80 years t Home to nation's first electric-drive vehicle engineering program and alternative energy technology

  2. Northern Illinois University Mechanical Engineering

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    and/or apply engineering knowledge to address societal needs; and to provide quality professionalNorthern Illinois University Mechanical Engineering Undergraduate Program 2013-2014 Engineering Building, room 226 Phone: 815-753-9979 www.niu.edu/me #12;DEPARTMENT OF MECHANICAL ENGINEERING NORTHERN

  3. Invariance in adelic quantum mechanics

    E-Print Network [OSTI]

    Branko Dragovich

    2006-12-07

    Adelic quantum mechanics is form invariant under an interchange of real and p-adic number fields as well as rings of p-adic integers. We also show that in adelic quantum mechanics Feynman's path integrals for quadratic actions with rational coefficients are invariant under changes of their entries within nonzero rational numbers.

  4. Integrated Mechanical & Electrical Engineering (IMEE)

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    Integrated Mechanical & Electrical Engineering (IMEE) Department of Electronic & Electrical and electrical engineering are in great demand because of their ability to work on complex interdisciplinary and become an expert in the core areas of both mechanical and electrical engineering. Subject aims

  5. Three Pictures of Quantum Mechanics

    E-Print Network [OSTI]

    Olszewski Jr., Edward A.

    Three Pictures of Quantum Mechanics Thomas R. Shafer April 17, 2009 #12;Outline of the Talk · Brief Three Pictures of Quantum Mechanics Schrödinger Heisenberg Dirac #12;The Three Pictures of Quantum picture, the operators stay fixed while the Schrödinger equation changes the basis with time. #12;The

  6. Interdisciplinary: Chemical Engineer/Mechanical Engineer (Pathways...

    Energy Savers [EERE]

    Interdisciplinary: Chemical EngineerMechanical Engineer (Pathways Recent Graduate Program) Interdisciplinary: Chemical EngineerMechanical Engineer (Pathways Recent Graduate...

  7. Lattice Mechanics of Origami Tessellations

    E-Print Network [OSTI]

    Arthur A. Evans; Jesse L. Silverberg; Christian D. Santangelo

    2015-07-09

    Origami-based design holds promise for developing materials whose mechanical properties are tuned by crease patterns introduced to thin sheets. Although there has been heuristic developments in constructing patterns with desirable qualities, the bridge between origami and physics has yet to be fully developed. To truly consider origami structures as a class of materials, methods akin to solid mechanics need to be developed to understand their long-wavelength behavior. We introduce here a lattice theory for examining the mechanics of origami tessellations in terms of the topology of their crease pattern and the relationship between the folds at each vertex. This formulation provides a general method for associating mechanical properties with periodic folded structures, and allows for a concrete connection between more conventional materials and the mechanical metamaterials constructed using origami-based design.

  8. Mechanism Design and Truthful Ocan Sankur

    E-Print Network [OSTI]

    Doyen, Laurent

    Mechanism Design and Truthful Algorithms Ocan Sankur 13/06/2013 Ocan Sankur (ULB) Mechanism Design and Truthful Algorithms June 13, 2013 1 / 25 #12;Mechanism Design Mechanism design is about designing games mechanisms where the best strategy is to tell the truth. Ocan Sankur (ULB) Mechanism Design and Truthful

  9. Undergraduate Student Handbook Mechanical Engineering Department of Mechanical Engineering, Faculty of Engineering, McGill University

    E-Print Network [OSTI]

    Barthelat, Francois

    Undergraduate Student Handbook Mechanical Engineering 1 17/04/2015 Department of Mechanical;Undergraduate Student Handbook Mechanical Engineering 2 Table of Contents Department of Mechanical Engineering of Mechanical Engineering Academic Advisory Personnel............................................5 Department

  10. Contact Mechanics Based Mechanical Characterization of Portland Cement Paste 

    E-Print Network [OSTI]

    Jones, Christopher

    2012-02-14

    Current research interest in multi-scale modeling of cement paste requires accurate characterization of the time-dependent mechanical properties of the material, particularly the C-S-H phase. Nanoindentation is evaluated as a tool for measuring...

  11. MECH 386 INDUSTRIAL FLUID MECHANICS INDUSTRIAL FLUID MECHANICS

    E-Print Network [OSTI]

    Phani, A. Srikantha

    technologies - Wind turbine - Wave energy (Wells turbine) - Tidal power 7. Flow in porous media - Darcy's law 8 fluid-mechanics research and its application, as well as the technology associated with fluid flow

  12. A Probability Based Framework for Testing the Missing Data Mechanism

    E-Print Network [OSTI]

    Lin, Johnny Cheng-Han

    2013-01-01

    Effects: Missingness Mechanism . . . . . . . .DescribingMissing Data Mechanisms . . . . . . . . . . . . . Review ofof the MCAR Missingness Mechanism . . . . . . . . . .

  13. FORESTRY COMMISSION Mechanical Engineering Services

    E-Print Network [OSTI]

    1 FORESTRY COMMISSION Mechanical Engineering Services TENDER SALE of surplus Forestry Commission to be in £ Sterling. 3. Tenders will be subject to VAT @ 20% 4. The Forestry Commission reserves the right

  14. Mechanical Engineering Department Seminar Series

    E-Print Network [OSTI]

    Awtar, Shorya

    Mechanical Engineering Department Seminar Series The use of Virtual Prototyping and 3D Printing-based medical device design and manufacture linked up with 3D printing. The improvements will include patient

  15. Student #__________________ Department of Mechanical Engineering

    E-Print Network [OSTI]

    Feeny, Brian

    Student #__________________ Department of Mechanical Engineering Michigan State University East. Gaseous fuel (e.g., propane) is fed through a small tube into the center of the porous sphere. The fuel

  16. Hyper-Hamiltonian quantum mechanics

    E-Print Network [OSTI]

    Vladimir Trifonov

    2006-03-02

    We present a modification of quantum mechanics with a *possible worlds* semantics. It is shown that `gauge' degrees of freedom along possible worlds can be used to encode gravitational information.

  17. Coulomb Drag Mechanisms in Graphene

    E-Print Network [OSTI]

    Abanin, D. A.

    Recent measurements revealed an anomalous Coulomb drag in graphene, hinting at new physics at charge neutrality. The anomalous drag is explained by a new mechanism based on energy transport, which involves interlayer energy ...

  18. Senior Mechanical Engineer Company Description

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    for manufacturability and familiarity with six-sigma tools preferred. · Strong analytical and problem solving skills-on experience developing and launching electro-mechanical products, preferable in military or automotive

  19. Mechanically balanced tapered plug valve

    DOE Patents [OSTI]

    Anaya, Jose R. (Coacalco, MX)

    1985-01-01

    The invention is a novel hermetic tapered plug valve having a spring-like resilient mechanism for providing axial balance to the plug and thereby prevent valve lock up.

  20. The Newton Wonder in Mechanics

    E-Print Network [OSTI]

    Donald Lynden-Bell

    2000-07-11

    Application of Newton's ideas from "Principia" gives many new results in mechanics. Here we explore the question ``What form of extra force will maintain the magnitude of a vector constant of the motion while changing its direction?''

  1. Fault-tolerant TCP mechanisms 

    E-Print Network [OSTI]

    Satapati, Suresh Kumar

    2000-01-01

    While fault-tolerance is supported by a variety of critical services that can be accessed over the Internet, they are not robust in that they are oblivious of the impact of their tolerant mechanisms on the service they ...

  2. The cellular mechanisms of learning in Aplysia: Of blind men and elephants

    E-Print Network [OSTI]

    Glanzman, David L

    2006-01-01

    postsynaptic mechanisms in a cellular analog of classical4019. Byrne, J. H. 1987. Cellular analysis of associativecorrelation of behavioral and cellular processes. Science

  3. Mechanical Dissipation in Silicon Flexures

    E-Print Network [OSTI]

    S. Reid; G. Cagnoli; D. R. M. Crooks; J. Hough; P. Murray; S. Rowan; M. M. Fejer; R. Route; S. Zappe

    2005-10-28

    The thermo-mechanical properties of silicon make it of significant interest as a possible material for mirror substrates and suspension elements for future long-baseline gravitational wave detectors. The mechanical dissipation in 92um thick single-crystal silicon cantilevers has been observed over the temperature range 85 K to 300 K, with dissipation approaching levels down to phi = 4.4E-7.

  4. Optomechanical conversion by mechanical turbines

    E-Print Network [OSTI]

    Milos Knezevic; Mark Warner

    2014-11-02

    Liquid crystal elastomers are rubbers with liquid crystal order. They contract along their nematic director when heated or illuminated. The shape changes are large and occur in a relatively narrow temperature interval, or at low illumination, around the nematic-isotropic transition. We present a conceptual design of a mechanical, turbine-based engine using photo-active liquid crystal elastomers to extract mechanical work from light. Its efficiency is estimated to be 40%.

  5. Engineering Mechanics Annual Report 2001

    E-Print Network [OSTI]

    Franssen, Michael

    Engineering Mechanics Annual Report 2001 Graduate School Engineering Mechanics c/o Eindhoven themes 1.5 1.7 Education 1.7 1.8 General description of developments in 2001 1.9 1.9 Aggregated input and output for 2001 1.11 1.10 Overview of input and output per participating group, 2001 1.13 1.11 Overview

  6. Bohmian Trajectories as the Foundation of Quantum Mechanics

    E-Print Network [OSTI]

    Sheldon Goldstein; Roderich Tumulka; Nino Zanghi

    2009-12-14

    Bohmian trajectories have been used for various purposes, including the numerical simulation of the time-dependent Schroedinger equation and the visualization of time-dependent wave functions. We review the purpose they were invented for: to serve as the foundation of quantum mechanics, i.e., to explain quantum mechanics in terms of a theory that is free of paradoxes and allows an understanding that is as clear as that of classical mechanics. Indeed, they succeed in serving that purpose in the context of a theory known as Bohmian mechanics, to which this article is an introduction.

  7. Enhancement Mechanisms of Low Energy Nuclear Reactions

    E-Print Network [OSTI]

    Gareev, F A

    2005-01-01

    The review of possible stimulation mechanisms of LENR (low energy nuclear reaction) is represented. We have concluded that transmutation of nuclei at low energies and excess heat are possible in the framework of the modern physical theory - the universal resonance synchronization principle [1] and based on its different enhancement mechanisms of reaction rates are responsible for these processes [2]. The excitation and ionization of atoms may play role as a trigger for LENR. Superlow energy of external fields may stimulate LENR [3]. Investigation of this phenomenon requires knowledge of different branches of science: nuclear and atomic physics, chemistry and electrochemistry, condensed matter and solid state physics,... The results of this research field can provide a new source of energy, substances and technologies. The puzzle of poor reproducibility of experimental data is due to the fact that LENR occurs in open systems and it is extremely sensitive to parameters of external fields and systems. Classical ...

  8. Quantum mechanics of a generalised rigid body

    E-Print Network [OSTI]

    Ben Gripaios; Dave Sutherland

    2015-04-06

    We consider the quantum version of Arnold's generalisation of a rigid body in classical mechanics. Thus, we quantise the motion on an arbitrary Lie group manifold of a particle whose classical trajectories correspond to the geodesics of any one-sided-invariant metric. We show how the derivation of the spectrum of energy eigenstates can be simplified by making use of automorphisms of the Lie algebra and (for groups of Type I) by methods of harmonic analysis. As examples, we consider all connected and simply-connected Lie groups up to dimension 3. This includes the universal cover of the archetypical rigid body, along with a number of new exactly-solvable models. We also discuss a possible application to the topical problem of quantising a perfect fluid.

  9. Quantum Mechanical Effects in Gravitational Collapse

    E-Print Network [OSTI]

    Eric Greenwood

    2010-01-12

    In this thesis we investigate quantum mechanical effects to various aspects of gravitational collapse. These quantum mechanical effects are implemented in the context of the Functional Schr\\"odinger formalism. The Functional Schr\\"odinger formalism allows us to investigate the time-dependent evolutions of the quantum mechanical effects, which is beyond the scope of the usual methods used to investigate the quantum mechanical corrections of gravitational collapse. Utilizing the time-dependent nature of the Functional Schr\\"odinger formalism, we study the quantization of a spherically symmetric domain wall from the view point of an asymptotic and infalling observer, in the absence of radiation. To build a more realistic picture, we then study the time-dependent nature of the induced radiation during the collapse using a semi-classical approach. Using the domain wall and the induced radiation, we then study the time-dependent evolution of the entropy of the domain wall. Finally we make some remarks about the possible inclusion of backreaction into the system.

  10. Unstable trajectories and the quantum mechanical uncertainty

    SciTech Connect (OSTI)

    Moser, Hans R. [Physics Institute, University of Zuerich, Winterthurerstrasse 190, CH-8057 Zuerich (Switzerland)], E-mail: moser@physik.uzh.ch

    2008-08-15

    There is still an ongoing discussion about various seemingly contradictory aspects of classical particle motion and its quantum mechanical counterpart. One of the best accepted viewpoints that intend to bridge the gap is the so-called Copenhagen Interpretation. A major issue there is to regard wave functions as probability amplitudes (usually for the position of a particle). However, the literature also reports on approaches that claim a trajectory for any quantum mechanical particle, Bohmian mechanics probably being the most prominent one among these ideas. We introduce a way to calculate trajectories as well, but our crucial ingredient is their well controlled local (thus also momentaneous) degree of instability. By construction, at every moment their unpredictability, i.e., their local separation rates of neighboring trajectories, is governed by the local value of the given modulus square of a wave function. We present extensive numerical simulations of the H and He atom, and for some velocity-related quantities, namely angular momentum and total energy, we inspect their agreement with the values appearing in wave mechanics. Further, we interpret the archetypal double slit interference experiment in the spirit of our findings. We also discuss many-particle problems far beyond He, which guides us to a variety of possible applications.

  11. Teaching Computer-Aided Mechanism Design and

    E-Print Network [OSTI]

    Cheng, Harry H.

    Teaching Computer-Aided Mechanism Design and Analysis Using a High-Level Mechanism Toolkit MATT into a course on mechanism analysis and design is presented. Mechanism analysis is enhanced when coupled computing environment. By solving mechanism design problems in C/Cþþ, the programming skills gained

  12. A Global Optimization Approach to Quantum Mechanics

    E-Print Network [OSTI]

    Xiaofei Huang

    2006-05-25

    This paper presents a global optimization approach to quantum mechanics, which describes the most fundamental dynamics of the universe. It suggests that the wave-like behavior of (sub)atomic particles could be the critical characteristic of a global optimization method deployed by nature so that (sub)atomic systems can find their ground states corresponding to the global minimum of some energy function associated with the system. The classic time-independent Schrodinger equation is shown to be derivable from the global optimization method to support this argument.

  13. Aerospace and Mechanical Engineers design and build unique, complex mechanical, optical,

    E-Print Network [OSTI]

    Rohs, Remo

    including control of turbulence, emerging fuel cell technologies, computational fluid mechanics, ground skills in the areas of mechanics, thermodynamics, fluid mechanics, heat transfer, materials and automatic

  14. Mechanism Design with Risk Aversion

    E-Print Network [OSTI]

    Bhalgat, Anand; Khanna, Sanjeev

    2011-01-01

    We design efficient algorithms to compute truthful mechanisms for risk-averse sellers, in Bayesian single-parameter and multi-parameter settings. We model risk aversion by a concave utility function, where the the seller maximizes its expected utility. Much earlier work on Bayesian mechanism design has focused on maximizing expected revenue, and no succinct characterization of expected utility maximizing mechanism is known even for multi-unit auctions. We design a poly-time algorithm for multi-unit auctions, to compute a sequential posted pricing mechanism (SPM) that for any $\\eps > 0$, yields a $(1-1/e-\\eps)$-approximation to the expected utility of an optimal mechanism. In comparison, the best known approximation factor using SPM is $(1-1/e)$ even for the expected revenue objective (linear utility). Our result uses a correlation gap bound and then applies concentration bounds to show the existence of an order-independent SPM for large inventory, and an approximation scheme for optimal adaptive SPM for small...

  15. Structure and mechanical behavior of bird beaks

    E-Print Network [OSTI]

    Seki, Yasuaki

    2009-01-01

    2.1.1 Structure and Mechanical Properties 2.2 Biomimetic2.3.3 Mechanical Properties of Keratins . . 2.3.4 Mammalian2.4.2 Mechanical Properties of Foams . . . . . . . . . .

  16. QUALITATIVE REASONING ABOUT FLUIDS AND MECHANICS

    E-Print Network [OSTI]

    Forbus, Kenneth D.

    QUALITATIVE REASONING ABOUT FLUIDS AND MECHANICS Hyeonkyeong Kim November 1993 The Institute and North West Water, Institute Partners . #12;QUALITATIVE REASONING ABOUT FLUIDS AND MECHANICS #12;()Copyright by Hyeonkyeong Kim 1993 #12;QUALITATIVE REASONING ABOUT FLUIDS AND MECHANICS

  17. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # ME0001 Page 1 of 16 Procedure Title: Department of Mechanical Engineering General Requirements ....................................................................................................... 16 #12;University of Saskatchewan Department of Mechanical Engineering Standard Operating

  18. Montana State University 1 Mechanical Engineering

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Montana State University 1 Mechanical Engineering The specific mission of the undergraduate Mechanical Engineering (ME) program is to prepare students for successful mechanical engineering. The ME undergraduate program is accredited by the Engineering Accreditation Commission of ABET, 415 N

  19. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat...................................................................................................... 9 #12;University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure Initials #12;University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure

  20. Shuodao Wang Department of Mechanical Engineering,

    E-Print Network [OSTI]

    Rogers, John A.

    Shuodao Wang Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208 Ming University, Evanston, IL 60208 Jian Wu Department of Engineering Mechanics, Tsinghua University, Beijing, Seoul, 151-744, Korea Nanshu Lu Department of Aerospace Engineering and Engineering Mechanics

  1. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat.....................................................................................................15 Reference Only #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials Reference Only #12;University of Saskatchewan Department of Mechanical Engineering

  2. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # MAT.....................................................................................................10 R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering

  3. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat........................................................................................................ 4 R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering

  4. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat.....................................................................................................10 R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering

  5. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat.....................................................................................................13 R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering

  6. Michigan State University Department of Mechanical Engineering

    E-Print Network [OSTI]

    Feeny, Brian

    Michigan State University Department of Mechanical Engineering BIOMECHANICAL CONCENTRATION (16-17 Credits) A mechanical engineering degree with the biomechanical concentration prepares students for both traditional mechanical engineering as well as bioengineering. Engineers trained in biomechanical engineering

  7. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat.....................................................................................................17 R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering

  8. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # Mat.....................................................................................................12 R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering Standard Date Initials R eference O nly #12;University of Saskatchewan Department of Mechanical Engineering

  9. University of Saskatchewan Department of Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # ME.....................................................................................................43 #12;University of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure of Saskatchewan Department of Mechanical Engineering Standard Operating Procedure # ME0016 Page 3 of 43 2

  10. GRADUATE STUDENT INFORMATION MECHANICAL AND INDUSTRIAL ENGINEERING

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    GRADUATE STUDENT INFORMATION MECHANICAL AND INDUSTRIAL ENGINEERING DEPARTMENT 2013/2014 September...................................................................................................................................3 B. COURSE REQUIREMENTS FOR A MASTER OF SCIENCE DEGREE IN MECHANICAL ENGINEERING OR MECHANICAL ENGINEERING (72 CREDITS

  11. Bayesian Algorithmic Mechanism Design [Extended Abstract

    E-Print Network [OSTI]

    Hartline, Jason D.

    Bayesian Algorithmic Mechanism Design [Extended Abstract] Jason D. Hartline Northwestern, Canada blucier@cs.toronto.edu ABSTRACT The principal problem in algorithmic mechanism design approach for designing incen- tive compatible mechanisms, namely that of Vickrey, Clarke, and Groves

  12. Mathematics 658 Nonlinear Dynamics and Geometic Mechanics

    E-Print Network [OSTI]

    Bloch, Anthony

    Mathematics 658 Nonlinear Dynamics and Geometic Mechanics Instructor: Anthony M. Bloch. Office of ordinary differential equations and dynamical systems, with applications to various mechanical and physical geometry, nonlinear stability theory, Lagrangian and Hamiltonian mechanics, integrable systems, reduction

  13. MECHANICS AND NONLINEAR CONTROL: MAKING UNDERWATER VEHICLES

    E-Print Network [OSTI]

    Leonard, Naomi

    MECHANICS AND NONLINEAR CONTROL: MAKING UNDERWATER VEHICLES RIDE AND GLIDE Naomi Ehrich Leonard \\Lambda \\Lambda Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544 naomi@princeton.edu Abstract: Methods from geometric mechanics and dynamical systems theory make

  14. Quantum Mechanics 1 for graduate students

    E-Print Network [OSTI]

    Course 606 Quantum Mechanics 1 for graduate students Fall 2010 Instructor Valery Pokrovsky 1 electromagnetic field. Gauge invariance. Landau levels. 7. Semiclassical approximation. 8. Quantum mechanics. Scattering. The main textbook is E. Merzbacher, Quantum Mechanics, third edition, Wiley. Additional

  15. Statistical mechanics of a cat's cradle

    E-Print Network [OSTI]

    Shen, Tongye; Wolynes, Peter G

    2006-01-01

    cells. In our view, cell mechanics remains at an early stagefor physics Statistical mechanics of a cat’s cradle Tongyemodel [2, 3] of cell mechanics [7], but here we limit

  16. Doorway mechanism for Dissociative Electron attachment

    E-Print Network [OSTI]

    Simons, Jack

    Doorway mechanism for Dissociative Electron attachment Thomas Sommerfeld Southeastern Louisiana University Hammond, LA Hammond, LA #12;Doorway mechanism for Dissociative Electron attachment Outline Dissociative Electron attachment Doorway mechanism for electron capture Electroninduced Waterloss from

  17. PIEZOELECTRIC POWER SCAVENGING OF MECHANICAL VIBRATION ENERGY

    E-Print Network [OSTI]

    Ervin, Elizabeth K.

    PIEZOELECTRIC POWER SCAVENGING OF MECHANICAL VIBRATION ENERGY PIEZOELECTRIC POWER SCAVENGING OFPIEZOELECTRIC POWER SCAVENGING OF MECHANICAL VIBRATION ENERGYMECHANICAL VIBRATION ENERGY CE 511- Structural of mechanical vibration into electrical energy using piezoelectric material. #12;ENERGY CONVERSIONENERGY

  18. Majorana Electroformed Copper Mechanical Analysis

    SciTech Connect (OSTI)

    Overman, Nicole R.; Overman, Cory T.; Kafentzis, Tyler A.; Edwards, Danny J.; Hoppe, Eric W.

    2012-04-30

    The MAJORANA DEMONSTRATOR is a large array of ultra-low background high-purity germanium detectors, enriched in 76Ge, designed to search for zero-neutrino double-beta decay. The DEMONSTRATOR will utilize ultra high purity electroformed copper for a variety of detector components and shielding. A preliminary mechanical evaluation was performed on the Majorana prototype electroformed copper material. Several samples were removed from a variety of positions on the mandrel. Tensile testing, optical metallography, scanning electron microscopy, and hardness testing were conducted to evaluate mechanical response. Analyses carried out on the Majorana prototype copper to this point show consistent mechanical response from a variety of test locations. Evaluation shows the copper meets or exceeds the design specifications.

  19. Deformation of the cell nucleus under indentation: Mechanics and mechanisms

    E-Print Network [OSTI]

    Vaziri, Ashkan

    -induced nuclear deformation and mechanisms of stress transition throughout the nucleus. Here, we develop representing the nucleoplasm and the nuclear envelope. The nuclear envelope itself is composed of three separate layers: two thin elastic layers representing the inner and outer nuclear membranes and one thicker

  20. Mechanical engineering Mechanical engineering is about solving problems, designing processes,

    E-Print Network [OSTI]

    Waikato, University of

    , from power stations to cars, robots and computers. The professional training mechanical engineers such as aerospace, automotive, dairy, energy, product and plant design, pulp and paper, as well as shipping,as well as virtual reality and entertainment. MaterialS & ProceSS engineering This programme focuses

  1. Computational Mechanics Research Laboratory, Department of Mechanical Engineering,

    E-Print Network [OSTI]

    Ghosh, Somnath

    involve orientation imaging microscopy (OIM) for microstructural characterization and mechanical testing a thermally activated energy theory for plastic flow, self and latent hardening, kinematic hardening, as well in a wide variety of applications such as structural components of vehicles, pressure vessels, line pipes

  2. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matter By SarahMODELING CLOUD1Mechanical BehaviorMechanical

  3. MECHANICAL MODELS FOR INTERSEISMIC DEFORMATION IN

    E-Print Network [OSTI]

    Kanda, Ravi

    MECHANICAL MODELS FOR INTERSEISMIC DEFORMATION IN SUBDUCTION ZONES Thesis by Ravi V. S. Kanda that mechanical coupling on such asperities alone is sufficient to explain currently available geodetic

  4. Enforcement Letter, Geiger Brothers Mechanical Contractors, INC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geiger Brothers Mechanical Contractors, INC - March 26, 2010 Enforcement Letter, Geiger Brothers Mechanical Contractors, INC - March 26, 2010 March 26, 2010 Issued to Geiger...

  5. School of Engineering Mechanical, Aerospace & Nuclear Engineering

    E-Print Network [OSTI]

    McLaughlin, Joyce R.

    School of Engineering Mechanical, Aerospace & Nuclear Engineering Undergraduate Handbook CLASS OF MECHANICAL, AEROSPACE AND NUCLEAR ENGINEERING (MANE) ................................................1 MANE .............................................................................................................................................................1 CAREERS IN ENGINEERING

  6. Electrical and Mechanical Properties of Graphene

    E-Print Network [OSTI]

    Bao, Wenzhong

    2011-01-01

    Nano Letters, 5 [67] G. Liu, Electrical Transport in CarbonOF CALIFORNIA RIVERSIDE Electrical and Mechanical PropertiesOF THE DISSERTATION Electrical and Mechanical Properties of

  7. Shaoxing Jinggong Mechanical and Electrical Research Institute...

    Open Energy Info (EERE)

    Shaoxing Jinggong Mechanical and Electrical Research Institute Company SJMERI Jump to: navigation, search Name: Shaoxing Jinggong Mechanical and Electrical Research Institute...

  8. NREL: Technology Transfer - Popular Mechanics: Scientists Break...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Popular Mechanics: Scientists Break This Virtual Power Grid to Save the Real One July 27, 2015 Popular Mechanics describes how NREL's Energy Systems Integration Facility (ESIF)...

  9. NREL: Energy Systems Integration - Popular Mechanics: Scientists...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Popular Mechanics: Scientists Break This Virtual Power Grid to Save the Real One July 27, 2015 Popular Mechanics describes how NREL's Energy Systems Integration Facility (ESIF)...

  10. Durability Improvements Through Degradation Mechanism Studies...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Improvements Through Degradation Mechanism Studies Durability Improvements Through Degradation Mechanism Studies Presented at the Department of Energy Fuel Cell Projects Kickoff...

  11. EMERGENCY RESPONSE PLAN DEPARTMENT: Mechanical Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    EMERGENCY RESPONSE PLAN DEPARTMENT: Mechanical Engineering Manufacturing, Applied Mechanics Authorization Authority Table of Contents: Fire, Fire Alarm and Other Emergencies..................................................................................................4 Medical Accidents, Incidents & Emergencies

  12. Cellular Mechanisms Underlying Retinal Wave Generation

    E-Print Network [OSTI]

    Ford, Kevin

    2011-01-01

    assembled by short-range cellular interactions. J Neurosci,II. III. Cellular mechanisms underlying cholinergic retinalL. Felix, Marla B. Feller. Cellular Mechanisms underlying

  13. CONTROL OF MECHANICALLY ACTIVATED POLYMERSOME FUSION: FACTORS...

    Office of Scientific and Technical Information (OSTI)

    CONTROL OF MECHANICALLY ACTIVATED POLYMERSOME FUSION: FACTORS AFFECTING FUSION. Citation Details In-Document Search Title: CONTROL OF MECHANICALLY ACTIVATED POLYMERSOME FUSION:...

  14. Statistical mechanics of the vacuum

    E-Print Network [OSTI]

    Christian Beck

    2012-03-01

    The vacuum is full of virtual particles which exist for short moments of time. In this paper we construct a chaotic model of vacuum fluctuations associated with a fundamental entropic field that generates an arrow of time. The dynamics can be physically interpreted in terms of fluctuating virtual momenta. This model leads to a generalized statistical mechanics that distinguishes fundamental constants of nature.

  15. Predicting the mechanism of phospholipidosis

    E-Print Network [OSTI]

    Lowe, Robert; Mussa, Hamse Y; Nigsch, Florian; Glen, Robert C; Mitchell, John BO

    2012-01-26

    , there remain a number of PPL+ compounds for which a rele- vant target cannot be identified. This may indicate that further protein targets are mechanistically relevant, or that binding of the compound directly to the lipid is a possible mechanism. Additional...

  16. Mechanical Engineering "The Lindbergh Lectures"

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    :50 PM Room 1106 Mechanical Engineering Building Industrial Automation 101 & A Few to industrial automation and overview of Rockwell Automation. In addition, several of the technologies of the Technologies That Make It Happen Presented by: Peter B. Schmidt, Principal Engineer Rockwell Automation

  17. GETTING AROUND THE MECHANICAL ENGINEERING

    E-Print Network [OSTI]

    Goldwasser, Shafi

    GETTING AROUND THE MECHANICAL ENGINEERING DEPARTMENT G A M E D Keep this guide to the ME;2 Guide to Undergraduate Study in MechE #12;MechE Undergraduate Office 3 Contents CONTENTS 3 MECHE Requirement 39 SB Thesis Requirement 41 #12;4 Guide to Undergraduate Study in MechE SPECIAL PROGRAMS 43

  18. Mechanical Engineering Department Seminar Series

    E-Print Network [OSTI]

    Awtar, Shorya

    electrode. The solar battery provides a promising approach of making renewable energy more affordable. . BioMechanical Engineering Department Seminar Series Rechargeable K-Oxygen and Solar Batteries: From of fuel cells and metal-air batteries. In my talk, I will first present a K-O2 battery that uses K+ ions

  19. Mechanical scriber for semiconductor devices

    DOE Patents [OSTI]

    Lin, Peter T. (East Brunswick, NJ)

    1985-01-01

    A mechanical scriber using a scribing tip, such as a diamond, provides controlled scriber forces with a spring-loaded compound lever arrangement. The scribing force and range of scribing depth are adjusted by a pair of adjustable micrometer heads. A semiconductor device, such as a multilayer solar cell, can be formed into scribed strips at each layer.

  20. MASTER OF SCIENCE MECHANICAL ENGINEERING

    E-Print Network [OSTI]

    -stage axial compressor as a function of the location of fouling. First, an extensive review is presentedMASTER OF SCIENCE IN MECHANICAL ENGINEERING 67 ANALYSIS OF THE SENSITIVITY OF MULTI-STAGE AXIAL COMPRESSORS TO FOULING AT VARIOUS STAGES Jonathan D. Baker -Lieutenant, United States Coast Guard B.S., United

  1. Mechanical scriber for semiconductor devices

    DOE Patents [OSTI]

    Lin, P.T.

    1985-03-05

    A mechanical scriber using a scribing tip, such as a diamond, provides controlled scriber forces with a spring-loaded compound lever arrangement. The scribing force and range of scribing depth are adjusted by a pair of adjustable micrometer heads. A semiconductor device, such as a multilayer solar cell, can be formed into scribed strips at each layer. 5 figs.

  2. From Quantum Mechanics to Thermodynamics?

    E-Print Network [OSTI]

    Steinhoff, Heinz-Jürgen

    From Quantum Mechanics to Thermodynamics? Dresden, 22.11.2004 Jochen Gemmer Universit¨at Osnabr to thermodynamical behavior · Quantum approach to thermodynamical behavior · The route to equilibrium · Summary of thermodynamical behavior entirely on the basis of Hamilton models and Schr¨odinger-type quantum dynamics. · define

  3. Printed in: ASCE Engineering Mechanics

    E-Print Network [OSTI]

    Printed in: ASCE Engineering Mechanics 1977, pp. 295-297. Pore pressure effeats in ine~hich increments of fluid pore-pressure enter constitutive relations for elastic and inelastic response. The former constrained) equilibrium states has the form, gen- eralized from [1,2] to include pore-pressure effects, d

  4. A Mechanically Verified Code Generator

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    A Mechanically Verified Code Generator William D. Young Technical Report 37 January, 1989, one which generates semantically equivalent target language code for any given source language program we describe the implementation and proof of a code generator, a major component of a compiler

  5. Mechanical Engineering "The Lindbergh Lectures"

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    such as surface defects and inferior mechanical properties compared to conventional solid injection molded parts Molding and An Ongoing Journey for Lightweight, Microcellular Plastics Presented by: Lih-Sheng (Tom) Turng of the Cornell Injection Molding Program (CIMP), which was founded in 1974 by Professor K. K. Wang and his

  6. Tarunraj Singh Department of Mechanical

    E-Print Network [OSTI]

    Singh, Tarunraj

    Tarunraj Singh Department of Mechanical and Aerospace Engineering, SUNY at Buffalo, Buffalo, NY controller an input shaper. Singh and Vadali 5 il- lustrated that a time-delay filter designed to locate by Singh 7 are tech- niques that have been proposed to design robust filters. These controllers

  7. Fracture Mechanics and Failure Analysis

    E-Print Network [OSTI]

    New South Wales, University of

    concepts: Griffith criterion, K=Ya, K=KIC, ductile and brittle fracture, cyclic fatigue, environmentally, yield criteria. 4 Elastic-Plastic Analysis 5 Fracture toughness testing 6 Crack Growth Resistance - RMATS4004 Fracture Mechanics and Failure Analysis Course Outline Session 1, 2015 School of Materials

  8. Battery Vent Mechanism And Method

    DOE Patents [OSTI]

    Ching, Larry K. W. (Littleton, CO)

    2000-02-15

    Disclosed herein is a venting mechanism for a battery. The venting mechanism includes a battery vent structure which is located on the battery cover and may be integrally formed therewith. The venting mechanism includes an opening extending through the battery cover such that the opening communicates with a plurality of battery cells located within the battery case. The venting mechanism also includes a vent manifold which attaches to the battery vent structure. The vent manifold includes a first opening which communicates with the battery vent structure opening and second and third openings which allow the vent manifold to be connected to two separate conduits. In this manner, a plurality of batteries may be interconnected for venting purposes, thus eliminating the need to provide separate vent lines for each battery. The vent manifold may be attached to the battery vent structure by a spin-welding technique. To facilitate this technique, the vent manifold may be provided with a flange portion which fits into a corresponding groove portion on the battery vent structure. The vent manifold includes an internal chamber which is large enough to completely house a conventional battery flame arrester and overpressure safety valve. In this manner, the vent manifold, when installed, lessens the likelihood of tampering with the flame arrester and safety valve.

  9. The ubiquity of the symplectic hamiltonian equations in mechanics

    E-Print Network [OSTI]

    P. Balseiro; M. de Leon; J. C. Marrero; D. Martin de Diego

    2008-11-26

    In this paper, we derive a "hamiltonian formalism" for a wide class of mechanical systems, including classical hamiltonian systems, nonholonomic systems, some classes of servomechanism... This construction strongly relies in the geometry characterizing the different systems. In particular, we obtain that the class of the so-called algebroids covers a great variety of mechanical systems. Finally, as the main result, a hamiltonian symplectic realization of systems defined on algebroids is obtained.

  10. Time and Entropy in the Foundations of Mechanics

    E-Print Network [OSTI]

    R Assumpcao

    2007-06-17

    This contribution analyses the classical laws of motion by means of an approach relating time and entropy. We argue that adopting the notion of change of states as opposed to the usual derivation of Newton's laws in terms of fields a broader picture is obtained, suggesting that diverse branches of physics- classical, quantum, relativistic and statistical mechanics - turn out to be related by a common foundation.

  11. Mechanical effects in cookoff modeling

    SciTech Connect (OSTI)

    Gross, R.J.; Baer, M.R.; Hobbs, M.L.

    1994-07-01

    Complete cookoff modeling of energetic material in confined geometries must couple thermal, chemical and mechanical effects. In the past, modeling has focused on the prediction of the onset of combustion behavior based only on thermal-chemistry effects with little or no regard to the mechanical behavior of the energetic material. In this paper, an analysis tool is outlined which couples thermal, chemical, and mechanical behavior for one-dimensional Geometries comprised of multi-materials. A reactive heat flow code, XCHEM, and a quasistatic mechanics code, SANTOS, have been completely coupled using, a reactive, elastic-plastic constitutive model describing pressurization of the energetic material. This new Thermally Reactive Elastic-plastic explosive code, TREX, was developed to assess the coupling, of mechanics with thermal chemistry making multidimensional cookoff analysis possible. In this study, TREX is applied to confined and unconfined systems. The confined systems simulate One-Dimensional Time to explosion (ODTX) experiments in both spherical and cylindrical configurations. The spherical ODTX system is a 1.27 cm diameter sphere of TATB confined by aluminum exposed to a constant external temperature. The cylindrical ODTX system is an aluminum tube filled with HMX, NC, and inert exposed to a constant temperature bath. Finally. an unconfined system consisting of a hollow steel cylinder filled with a propellant composed of Al, RMX, and NC, representative of a rocket motor, is considered. This model system is subjected to transient internal and external radiative/convective boundary conditions representative of 5 minutes exposure to a fire. The confined systems show significant pressure prior to ignition, and the unconfined system shows extrusion of the propellent suggesting that the energetic material becomes more shock sensitive.

  12. Bohmian Mechanics with Complex Action: A New Trajectory-Based Formulation of Quantum Mechanics

    E-Print Network [OSTI]

    Yair Goldfarb; Ilan Degani; David J. Tannor

    2006-04-20

    In recent years there has been a resurgence of interest in Bohmian mechanics as a numerical tool because of its local dynamics, which suggest the possibility of significant computational advantages for the simulation of large quantum systems. However, closer inspection of the Bohmian formulation reveals that the nonlocality of quantum mechanics has not disappeared -- it has simply been swept under the rug into the quantum force. In this paper we present a new formulation of Bohmian mechanics in which the quantum action, S, is taken to be complex. This leads to a single equation for complex S, and ultimately complex x and p but there is a reward for this complexification -- a significantly higher degree of localization. The quantum force in the new approach vanishes for Gaussian wavepacket dynamics, and its effect on barrier tunneling processes is orders of magnitude lower than that of the classical force. We demonstrate tunneling probabilities that are in virtually perfect agreement with the exact quantum mechanics down to 10^{-7} calculated from strictly localized quantum trajectories that do not communicate with their neighbors. The new formulation may have significant implications for fundamental quantum mechanics, ranging from the interpretation of non-locality to measures of quantum complexity.

  13. The Mechanical Engineering Building, Then and Now

    E-Print Network [OSTI]

    Lightsey, Glenn

    #12;The Mechanical Engineering Building, Then and Now Gebauer Building (1913) #12;The Mechanical Engineering Building, Then and Now Taylor Hall (1933) #12;The Mechanical Engineering Building, Then and Now Moving into the new ME Building (1983) #12;The Mechanical Engineering Building, Then and Now ME's Home

  14. Mechanical properties and tribological behavior of contaminate...

    Office of Scientific and Technical Information (OSTI)

    AND MISCELLANEOUSMATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; MECHANICAL PROPERTIES; TRIBOLOGY; PARTICULATES; NANOSTRUCTURES; IMPURITIES; MACHINE PARTS; MINIATURIZATION...

  15. Montana State University 1 Mechanical Engineering

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Montana State University 1 Mechanical Engineering Degrees Offered · M.S. In Mechanical Engineering (MSME) · Master of Engineering in Mechanical Engineering (M.Eng. ME) · Ph.D. in Engineering -- Industrial Engineering and Mechanical Engineering Options Admission Normally, applicants must present

  16. Mechanical and Manufacturing Engineering Petroleum Engineering Minor

    E-Print Network [OSTI]

    Mechanical and Manufacturing Engineering Petroleum Engineering Minor The Department of Mechanical and Manufacturing Engineering offers a minor in petroleum engineering within the mechanical engineering major program. This minor builds on the fundamentals provided by a basis in mechanical engineering and adds

  17. Mechanical and Industrial Engineering John Stuart

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Mechanical and Industrial Engineering John Stuart Paul Washburn Co-Chairs MIE IAB Meeting #12;2Mechanical and Industrial Engineering Dean Tim Anderson #12;3Mechanical and Industrial Engineering Strategic vision for growing College Goal Method Current resources #12;4Mechanical and Industrial Engineering

  18. Partial Revelation Automated Mechanism Design Nathanael Hyafil

    E-Print Network [OSTI]

    Boutilier, Craig

    Partial Revelation Automated Mechanism Design Nathana¨el Hyafil Department of Computer Science mechanism design settings, optimal general-purpose mechanisms are not known. Thus the automated design techniques for au- tomated mechanism design (AMD) require the revelation of full utility information from

  19. The Mechanics of Incremental Sheet Forming

    E-Print Network [OSTI]

    Cambridge, University of

    The Mechanics of Incremental Sheet Forming Kathryn Jackson Pembroke College February 2008, the deformation mechanics is not fully understood. This thesis presents new insights into the mechanics of ISF forces measured in ISF. The mechanics of ISF of sheet metals is researched. Through-thickness deformation

  20. Ellad B. Tadmor Aerospace Engineering and Mechanics

    E-Print Network [OSTI]

    Tadmor, Ellad B.

    Ellad B. Tadmor Aerospace Engineering and Mechanics University of Minnesota 107 Akerman Hall, 110 of Technology, Mechanical Engineering (cum laude), June 1987 M.Sc. Technion ­ Israel Institute of Technology, Mechanical Engineering, June 1991 Ph.D. Brown University, Division of Engineering, Mechanics of Solids

  1. Bohmian Mechanics Detlef Durr, Sheldon Goldstein,

    E-Print Network [OSTI]

    Goldstein, Sheldon

    Bohmian Mechanics Detlef D¨urr, Sheldon Goldstein, Roderich Tumulka, and Nino Zangh`i December 31, 2004 Quantum Mechanics and Reality. While quantum mechanics, as presented in physics text- books (within the realm of quantum mechanics). A description of re- ality, in contrast, would tell us what

  2. Continuum Mechanics Unit code: MATH45061

    E-Print Network [OSTI]

    Sidorov, Nikita

    MATH45061 Continuum Mechanics Unit code: MATH45061 Credit Rating: 15 Unit level: Level 4 Teaching concerns the formulation and solution of problems in continuum mechanics (solid and fluid mechanics) from equations. Overview This unit describes the fundamental theory of continuum mechanics in a unified

  3. Some topics in thermodynamics and quantum mechanics

    E-Print Network [OSTI]

    Robert Carroll

    2012-11-17

    We sketch some connecting relations involving fractional and quantum calculi, fractal structure, thermodynamics, and quantum mechanics.

  4. QUANTUM MECHANICS AND REAL Department of Mathematics

    E-Print Network [OSTI]

    Penrose, Oliver

    QUANTUM MECHANICS AND REAL EVENTS O.Penrose Department of Mathematics Heriot-Watt University into the evolution of a quantum-mechanical system, without altering the usual laws of quantum mechanics in any way Although quantum mechanics is wonderfully successful for predicting the results of experiments done

  5. Emergence of Quantum Mechanics from a Sub-Quantum Statistical Mechanics

    E-Print Network [OSTI]

    Gerhard Groessing

    2013-04-12

    A research program within the scope of theories on "Emergent Quantum Mechanics" is presented, which has gained some momentum in recent years. Via the modeling of a quantum system as a non-equilibrium steady-state maintained by a permanent throughput of energy from the zero-point vacuum, the quantum is considered as an emergent system. We implement a specific "bouncer-walker" model in the context of an assumed sub-quantum statistical physics, in analogy to the results of experiments by Couder's group on a classical wave-particle duality. We can thus give an explanation of various quantum mechanical features and results on the basis of a "21st century classical physics", such as the appearance of Planck's constant, the Schr\\"odinger equation, etc. An essential result is given by the proof that averaged particle trajectories' behaviors correspond to a specific type of anomalous diffusion termed "ballistic" diffusion on a sub-quantum level. It is further demonstrated both analytically and with the aid of computer simulations that our model provides explanations for various quantum effects such as double-slit or n-slit interference. We show the averaged trajectories emerging from our model to be identical to Bohmian trajectories, albeit without the need to invoke complex wave functions or any other quantum mechanical tool. Finally, the model provides new insights into the origins of entanglement, and, in particular, into the phenomenon of a "systemic" nonlocality.

  6. The extension problem for partial Boolean structures in Quantum Mechanics

    E-Print Network [OSTI]

    Costantino Budroni; Giovanni Morchio

    2011-01-13

    Alternative partial Boolean structures, implicit in the discussion of classical representability of sets of quantum mechanical predictions, are characterized, with definite general conclusions on the equivalence of the approaches going back to Bell and Kochen-Specker. An algebraic approach is presented, allowing for a discussion of partial classical extension, amounting to reduction of the number of contexts, classical representability arising as a special case. As a result, known techniques are generalized and some of the associated computational difficulties overcome. The implications on the discussion of Boole-Bell inequalities are indicated.

  7. The extension problem for partial Boolean structures in Quantum Mechanics

    E-Print Network [OSTI]

    Budroni, Costantino

    2010-01-01

    Alternative partial Boolean structures, implicit in the discussion of classical representability of sets of quantum mechanical predictions, are characterized, with definite general conclusions on the equivalence of the approaches going back to Bell and Kochen-Specker. An algebraic approach is presented, allowing for a discussion of partial classical extension, amounting to reduction of the number of contexts, classical representability arising as a special case. As a result, known techniques are generalized and some of the associated computational difficulties overcome. The implications on the discussion of Boole-Bell inequalities are indicated.

  8. The Schwinger mechanism and graphene

    E-Print Network [OSTI]

    Danielle Allor; Thomas D. Cohen; David A. McGady

    2008-09-22

    The Schwinger mechanism, the production of charged particle-antiparticle pairs in a macroscopic external electric field, is derived for 2+1 dimensional theories. The rate of pair production per unit area for four species of massless fermions, with charge $q$, in a constant electric field $E$ is given by $ \\pi^{-2} \\hbar^{-3/2} \\tilde{c}^{-1/2} (q E)^{3/2} $ where $\\tilde{c}$ is the speed of light for the two-dimensional system. To the extent undoped graphene behaves like the quantum field-theoretic vacuum for massless fermions in 2+1 dimensions, the Schwinger mechanism should be testable experimentally. A possible experimental configuration for this is proposed. Effects due to deviations from this idealized picture of graphene are briefly considered. It is argued that with present day samples of graphene, tests of the Schwinger formula may be possible.

  9. Chemically assisted mechanical refrigeration process

    DOE Patents [OSTI]

    Vobach, A.R.

    1987-11-24

    There is provided a chemically assisted mechanical refrigeration process including the steps of: mechanically compressing a refrigerant stream which includes vaporized refrigerant; contacting the refrigerant with a solvent in a mixer at a pressure sufficient to promote substantial dissolving of the refrigerant in the solvent in the mixer to form a refrigerant-solvent solution while concurrently placing the solution in heat exchange relation with a working medium to transfer energy to the working medium, said refrigerant-solvent solution exhibiting a negative deviation from Raoult's Law; reducing the pressure over the refrigerant-solvent solution in an evaporator to allow the refrigerant to vaporize and substantially separate from the solvent while concurrently placing the evolving refrigerant-solvent solution in heat exchange relation with a working medium to remove energy from the working medium to thereby form a refrigerant stream and a solvent stream; and passing the solvent and refrigerant stream from the evaporator. 5 figs.

  10. Chemically assisted mechanical refrigeration process

    DOE Patents [OSTI]

    Vobach, A.R.

    1987-06-23

    There is provided a chemically assisted mechanical refrigeration process including the steps of: mechanically compressing a refrigerant stream which includes vaporized refrigerant; contacting the refrigerant with a solvent in a mixer at a pressure sufficient to promote substantial dissolving of the refrigerant in the solvent in the mixer to form a refrigerant-solvent solution while concurrently placing the solution in heat exchange relation with a working medium to transfer energy to the working medium, said refrigerant-solvent solution exhibiting a negative deviation from Raoult's Law; reducing the pressure over the refrigerant-solvent solution in an evaporator to allow the refrigerant to vaporize and substantially separate from the solvent while concurrently placing the evolving refrigerant-solvent solution in heat exchange relation with a working medium to remove energy from the working medium to thereby form a refrigerant stream and a solvent stream; and passing the solvent and refrigerant stream from the evaporator. 5 figs.

  11. Chemically assisted mechanical refrigeration process

    DOE Patents [OSTI]

    Vobach, Arnold R. (6006 Allentown Dr., Spring, TX 77379)

    1987-01-01

    There is provided a chemically assisted mechanical refrigeration process including the steps of: mechanically compressing a refrigerant stream which includes vaporized refrigerant; contacting the refrigerant with a solvent in a mixer (11) at a pressure sufficient to promote substantial dissolving of the refrigerant in the solvent in the mixer (11) to form a refrigerant-solvent solution while concurrently placing the solution in heat exchange relation with a working medium to transfer energy to the working medium, said refrigerant-solvent solution exhibiting a negative deviation from Raoult's Law; reducing the pressure over the refrigerant-solvent solution in an evaporator (10) to allow the refrigerant to vaporize and substantially separate from the solvent while concurrently placing he evolving refrigerant-solvent solution in heat exchange relation with a working medium to remove energy from the working medium to thereby form a refrigerant stream and a solvent stream; and passing the solvent and refrigerant stream from the evaporator.

  12. Chemically assisted mechanical refrigeration process

    DOE Patents [OSTI]

    Vobach, Arnold R. (6006 Allentown Dr., Spring, TX 77389)

    1987-01-01

    There is provided a chemically assisted mechanical refrigeration process including the steps of: mechanically compressing a refrigerant stream which includes vaporized refrigerant; contacting the refrigerant with a solvent in a mixer (11) at a pressure sufficient to promote substantial dissolving of the refrigerant in the solvent in the mixer (11) to form a refrigerant-solvent solution while concurrently placing the solution in heat exchange relation with a working medium to transfer energy to the working medium, said refrigerant-solvent solution exhibiting a negative deviation from Raoult's Law; reducing the pressure over the refrigerant-solvent solution in an evaporator (10) to allow the refrigerant to vaporize and substantially separate from the solvent while concurrently placing the evolving refrigerant-solvent solution in heat exchange relation with a working medium to remove energy from the working medium to thereby form a refrigerant stream and a solvent stream; and passing the solvent and refrigerant stream from the evaporator.

  13. Locking mechanism for indexing device

    DOE Patents [OSTI]

    Lindemeyer, Carl W. (Aurora, IL)

    1984-01-01

    Disclosed is a locking mechanism for an indexing spindle. A conventional r gear having outwardly extending teeth is affixed to the spindle. Also included is a rotatably mounted camshaft whose axis is arranged in skewed relationship with the axis of the spindle. A disk-like wedge having opposing camming surfaces is eccentrically mounted on the camshaft. As the camshaft is rotated, the camming surfaces of the disc-like member are interposed between adjacent gear teeth with a wiping action that wedges the disc-like member between the gear teeth. A zero backlash engagement between disc-like member and gear results, with the engagement having a high mechanical advantage so as to effectively lock the spindle against bidirectional rotation.

  14. DOE fundamentals handbook: Mechanical science. Volume 2

    SciTech Connect (OSTI)

    Not Available

    1993-01-01

    The Mechanical Science Handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and the technical staff with the necessary fundamentals training to ensure a basic understanding of mechanical components and mechanical science. The handbook includes information diesel engines, heat exchangers, pumps, valves, and miscellaneous mechanical components. This information will provide personnel with a foundation for understanding the construction and operation of mechanical components that are associated with various DOE nuclear facility operations and maintenance.

  15. Mechanical Control of Enzymes Using DNA Molecular Springs

    E-Print Network [OSTI]

    Tseng, Chiao-Yu

    2013-01-01

    Responses of GK to Mechanical Stresses . . . . . . .4 Mechanical Control of Renilla116 Relation of Enzymatic Activity and Mechanical Stress

  16. Particle Suspension Mechanisms - Supplemental Material

    SciTech Connect (OSTI)

    Dillon, M B

    2011-03-03

    This supplemental material provides a brief introduction to particle suspension mechanisms that cause exfoliated skin cells to become and remain airborne. The material presented here provides additional context to the primary manuscript and serves as background for designing possible future studies to assess the impact of skin cells as a source of infectious aerosols. This introduction is not intended to be comprehensive and interested readers are encouraged to consult the references cited.

  17. Coherent states in quantum mechanics

    E-Print Network [OSTI]

    Rodrigues, R D L; Fernandes, D

    2001-01-01

    We present a review work on the coherent states is non-relativistic quantum mechanics analysing the quantum oscillators in the coherent states. The coherent states obtained via a displacement operator that act on the wave function of ground state of the oscillator and the connection with Quantum Optics which were implemented by Glauber have also been considered. A possible generalization to the construction of new coherent states it is point out.

  18. Mechanical engineering department technical review

    SciTech Connect (OSTI)

    Carr, R.B. Denney, R.M. (eds.)

    1981-01-01

    The Mechanical Engineering Department Technical Review is published to: (1) inform the readers of various technical activities within the department, (2) promote exchange of ideas, and (3) give credit to the personnel who are achieving the results. The report is formatted into two parts: technical acievements and publication abstracts. The first is divided into eight sections, one for each division in the department providing the reader with the names of the personnel and the division accomplishing the work.

  19. STATISTICAL MECHANICS PRACTICE EXAM 2005

    E-Print Network [OSTI]

    Dorlas, Teunis C.

    STATISTICAL MECHANICS PRACTICE EXAM 2005 Time allotted: 3 hours for 5 questions. 1. (i) Give density of a system of independent spins si = ±1 with energy levels given by E(s1, . . . , sN ) = -H N i=1 si. 2. (i) Derive the expression f() = - 1 ln eJ cosh H + e2J sinh2 H + e-2J for the free energy

  20. Perturbativity in the seesaw mechanism

    E-Print Network [OSTI]

    Asaka, Takehiko

    2015-01-01

    We consider the Standard Model extended by right-handed neutrinos to explain massive neutrinos. These new fermions can be observed if they have sufficiently small masses and large mixings. In such cases, the seesaw mechanism requires large Yukawa couplings of heavier right-handed neutrinos. We show that the perturbativity condition on the Yukawa couplings gives severe upper bounds on the mixing. High energy phenomena, such as leptogenesis, can be tested by low energy experiments.

  1. Mechanical formalism for tissue dynamics

    E-Print Network [OSTI]

    Sham Tlili; Cyprien Gay; Francois Graner; Philippe Marcq; François Molino; Pierre Saramito

    2014-12-23

    The understanding of morphogenesis in living organisms has been renewed by tremendous progress in experimental techniques that provide access to cell-scale, quantitative information both on the shapes of cells within tissues and on the genes being expressed. This information suggests that our understanding of the respective contributions of gene expression and mechanics, and of their crucial entanglement, will soon leap forward. Biomechanics increasingly benefits from models, which assist the design and interpretation of experiments, point out the main ingredients and assumptions, and ultimately lead to predictions. The newly accessible local information thus calls for a reflection on how to select suitable classes of mechanical models. We review both mechanical ingredients suggested by the current knowledge of tissue behaviour, and modelling methods that can help generate a rheological diagram or a constitutive equation. We distinguish cell scale ("intra-cell") and tissue scale ("inter-cell") contributions. We recall the mathematical framework developped for continuum materials and explain how to transform a constitutive equation into a set of partial differential equations amenable to numerical resolution. We show that when plastic behaviour is relevant, the dissipation function formalism appears appropriate to generate constitutive equations; its variational nature facilitates numerical implementation, and we discuss adaptations needed in the case of large deformations. The present article gathers theoretical methods that can readily enhance the significance of the data to be extracted from recent or future high throughput biomechanical experiments.

  2. FLEXURE DESIGN FOR EIGHT-BAR RECTILINEAR MOTION MECHANISM

    E-Print Network [OSTI]

    Liu, Y; McCarthy, JM

    2015-01-01

    pivots,” Journal of Mechanical Design 116.1 (1994): 280- [modules,” Journal of Mechanical Design 129.6 (2007): 625-mechanisms,” Journal of Mechanical Design [15] Xie, Huikai,

  3. Active noise canceling system for mechanically cooled germanium radiation detectors

    DOE Patents [OSTI]

    Nelson, Karl Einar; Burks, Morgan T

    2014-04-22

    A microphonics noise cancellation system and method for improving the energy resolution for mechanically cooled high-purity Germanium (HPGe) detector systems. A classical adaptive noise canceling digital processing system using an adaptive predictor is used in an MCA to attenuate the microphonics noise source making the system more deployable.

  4. Mechanism of acoustic emissions from booming sand dunes

    E-Print Network [OSTI]

    Zhen-Ting Wang

    2013-05-10

    The classical elastic mechanics shows that the fundamental frequency of a sand grain chain is similar to the typical frequency of acoustic emission generated by the booming dunes. The "song of dunes" is therefore considered to originate from the resonance of grain chains occurring within a solid layer only several centimeters thick.

  5. The Unified Theory - Electricity, Magnetism, Gravity and Mechanics

    E-Print Network [OSTI]

    Pretterebner Julius

    1999-08-12

    This article shows the relations between the electricity, magnetism, gravity and mechanics by presenting an existing hidden structure in the Maxwell equations. This hidden structure allows to discover the classical physic from a new point of view leading to the unified theory (UT).

  6. The Universal Arrow of Time II: Quantum mechanics case

    E-Print Network [OSTI]

    Oleg Kupervasser

    2013-05-23

    This paper is a natural continuation of our previous paper arXiv:1011.4173 . We illustrated earlier that in classical Hamilton mechanics, for overwhelming majority of real chaotic macroscopic systems, alignment of their thermodynamic time arrows occurs because of their low interaction. This fact and impossibility to observe entropy decrease at introspection explain the second law of thermodynamics. The situation in quantum mechanics is even a little bit easier: all closed systems of finite volume are periodic or nearly periodic. The proof in quantum mechanics is in many respects similar to the proof in classical Hamilton mechanics - it also uses small interaction between subsystems and impossibility to observe entropy decrease at introspection. However, there are special cases which were not found in the classical mechanics. In these cases one microstate corresponds to a set of possible macrostates (more precisely, their quantum superposition). Consideration of this property with use of decoherence theory and taking into account thermodynamic time arrows will introduce new outcomes in quantum mechanics. It allows to resolve basic paradoxes of quantum mechanics: (a) to explain the paradox of wave packet reduction at measurements when an observer is included in the system (introspection) (paradox of the Schrodinger cat); (b) to explain unobservability of superposition of macroscopic states by an external observer in real experiments (paradox of Wigner's friend); (c) to prove full equivalence of multi-world and Copenhagen interpretations of quantum mechanics; (d) to explain deviations from the exponential law at decay of particles and pass from one energy level to another (paradox of a kettle which will never begin to boil).

  7. A Generalized Analytical Mechanics in which Quantum Phenomena Appear

    E-Print Network [OSTI]

    Masao Yasuda

    2015-12-18

    We propose a mechanics of a massive particle in a potential field effective for both classical and quantum system as a modified classical analytical mechanics (modified CM). We transform, under coordinate transformation, the covariant tensor of order two in the Hamilton-Jacobi (H-J) eq. of CM, not with the classical action, but with extended action of diffeomorphism group. Then, the H-J eq., a first-order partial differential eq., is modified to a third-order one. The Euler-Lagrange (E-L) eq. of CM, a second-order ordinary differential eq., related to the H-J eq. through the action integral is accordingly modified to a fourth-order one. Thus obtained mechanics accommodates quantum phenomena due to the higher-order eqs., and always gives trajectory unlike quantum mechanics (QM) due to the E-L eq. Discrete energy levels of a particle in a confining potential are the same as those of QM because quantization criterion is equivalent. Particle distribution in an ensemble disagrees with that of QM even if initial distribution is set identical because dynamics is different; it however agrees with observed data to date within experimental uncertainty. The mechanics thus is a testable alternative to QM.

  8. UB DEPARTMENT OF MECHANICAL AND AEROSPACE ENGINEERING (MAE) BS in Mechanical Engineering (ME)

    E-Print Network [OSTI]

    Krovi, Venkat

    UB DEPARTMENT OF MECHANICAL AND AEROSPACE ENGINEERING (MAE) BS in Mechanical Engineering (ME) Facts,500. The mean annual wage for ME's is $85,930 · Degrees offered: BS, MS, and PhD · A five-year BS Mechanical Engineering + MBA program is available What do Mechanical Engineers Do? Mechanical engineers use principles

  9. Washington State University Vancouver Mech 303 Fluid Mechanics Mechanical Engineering Fall 2013 Syllabus

    E-Print Network [OSTI]

    Washington State University Vancouver Mech 303 Fluid Mechanics Mechanical Engineering Fall 2013 Syllabus 1 Fluid Mechanics Course: Mech 303, Fluid Mechanics, 3 Credits Prerequisite: Dynamics (Mech 212: VECS 105 Textbook: Fundamentals of Fluid Mechanics, 7 th Edition By Munson, Okiishi, Huebsch

  10. Department of Mechanical Engineering www.mech.northwestern.edu Department of Mechanical Engineering

    E-Print Network [OSTI]

    Bustamante, Fabián E.

    Department of Mechanical Engineering www.mech.northwestern.edu 1 Department of Mechanical #12;Department of Mechanical Engineering www.mech.northwestern.edu 2 ME Department Ranking The Chronicle of Higher Education, 2007, ranked us as No. 1 in Engineering Mechanics No. 7 in Mechanical

  11. A different approach to introducing statistical mechanics

    E-Print Network [OSTI]

    Moore, Thomas A

    2015-01-01

    The basic notions of statistical mechanics (microstates, multiplicities) are quite simple, but understanding how the second law arises from these ideas requires working with cumbersomely large numbers. To avoid getting bogged down in mathematics, one can compute multiplicities numerically for a simple model system such as an Einstein solid -- a collection of identical quantum harmonic oscillators. A computer spreadsheet program or comparable software can compute the required combinatoric functions for systems containing a few hundred oscillators and units of energy. When two such systems can exchange energy, one immediately sees that some configurations are overwhelmingly more probable than others. Graphs of entropy vs. energy for the two systems can be used to motivate the theoretical definition of temperature, $T= (\\partial S/\\partial U)^{-1}$, thus bridging the gap between the classical and statistical approaches to entropy. Further spreadsheet exercises can be used to compute the heat capacity of an Einst...

  12. The Mechanical Harvesting of Cotton. 

    E-Print Network [OSTI]

    Smith, H. P.; Killough, D. T.; Byrom, M. H.; Scoates, D.; Jones, D. L.

    1932-01-01

    - NO 1.831. Patented sept. 10. 1850 velop a mechanical cotton pick- er was made by S. S. Rembert and J. Prescott, of Memphis, Tennessee, September 10, 1850, when patent No. 7,631 in Sub- class 48* was issued to them. Their machine (Fig. 1... of the Haring Machine ing finxers (Fig. 6). The picker ng picking arm and fingers attarhed. arms project into the cotton plant from both sides (Fig. 7), and move backward at the same speed as the machine travels forward. The picking fingers radiate from...

  13. Controlled Thermo-Mechanical Processing

    SciTech Connect (OSTI)

    None

    2005-09-01

    The CTMP technology has the potential for widespread application in all major sectors of the domestic tube and pipe industry; two of the largest sectors are seamless mechanical tubing and seamless oil country tubular goods. It has been proven for the spheroidized annealing heat cycle for through-hardened steels and has led to the development of a recipe for automotive gear steels. Potential applications also exist in the smaller sectors of seamless line pipe, pressure tubing, and stainless tubing. The technology could also apply to non-ferrous metal industries, such as titanium.

  14. Mechanical accessories for mobile teleoperators

    SciTech Connect (OSTI)

    Feldman, M.J.; Herndon, J.N.

    1985-01-01

    The choice of optimum mechanical accessories for mobile teleoperators involves matching the criteria for emergency response with the available technology. This paper presents a general background to teleoperations, a potpourri of the manipulator systems available, and an argument for force reflecting manipulation. The theme presented is that the accomplishment of humanlike endeavors in hostile environments will be most successful when man model capabilities are utilized. The application of recent electronic technology to manipulator development has made new tools available to be applied to emergency response activities. The development activities described are products of the Consolidated Fuel Reprocessing Program at the Oak Ridge National Laboratory. 13 refs., 7 figs.

  15. Statistical Mechanics of Black Holes

    E-Print Network [OSTI]

    B. Harms; Y. Leblanc

    1992-05-11

    We analyze the statistical mechanics of a gas of neutral and charged black holes. The microcanonical ensemble is the only possible approach to this system, and the equilibrium configuration is the one for which most of the energy is carried by a single black hole. Schwarzschild black holes are found to obey the statistical bootstrap condition. In all cases, the microcanonical temperature is identical to the Hawking temperature of the most massive black hole in the gas. U(1) charges in general break the bootstrap property. The problems of black hole decay and of quantum coherence are also addressed.

  16. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse BergkampCentermillion Measurement of Muon Neutrino andMechanical Behavior

  17. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse BergkampCentermillion Measurement of Muon Neutrino andMechanical

  18. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matter By SarahMODELING CLOUD1Mechanical Behavior of Indium

  19. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matter By SarahMODELING CLOUD1Mechanical Behavior of

  20. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matter By SarahMODELING CLOUD1Mechanical Behavior

  1. Mechanical Behavior of Indium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on dark matter By SarahMODELING CLOUD1Mechanical

  2. Real homotopy theory and supersymmetric quantum mechanics

    E-Print Network [OSTI]

    Hyungrok Kim; Ingmar Saberi

    2015-11-03

    In the context of studying string backgrounds, much work has been devoted to the question of how similar a general quantum field theory (specifically, a two-dimensional superconformal theory) is to a sigma model. Put differently, one would like to know how well or poorly one can understand the physics of string backgrounds in terms of concepts of classical geometry. Much attention has also been given of late to the question of how geometry can be encoded in a microscopic physical description that makes no explicit reference to space and time. We revisit the first question, and review both well-known and less well-known results about geometry and sigma models from the perspective of dimensional reduction to supersymmetric quantum mechanics. The consequences of arising as the dimensional reduction of a $d$-dimensional theory for the resulting quantum mechanics are explored. In this context, we reinterpret the minimal models of rational (more precisely, complex) homotopy theory as certain supersymmetric Fock spaces, with unusual actions of the supercharges. The data of the Massey products appear naturally as supersymmetric vacuum states that are entangled between different degrees of freedom. This connection between entanglement and geometry is, as far as we know, not well-known to physicists. In addition, we take note of an intriguing numerical coincidence in the context of string compactification on hyper-Kahler eight-manifolds.

  3. Enhancement Mechanisms of Low Energy Nuclear Reactions

    E-Print Network [OSTI]

    F. A. Gareev; I. E. Zhidkova

    2005-05-08

    The review of possible stimulation mechanisms of LENR (low energy nuclear reaction) is represented. We have concluded that transmutation of nuclei at low energies and excess heat are possible in the framework of the modern physical theory - the universal resonance synchronization principle [1] and based on its different enhancement mechanisms of reaction rates are responsible for these processes [2]. The excitation and ionization of atoms may play role as a trigger for LENR. Superlow energy of external fields may stimulate LENR [3]. Investigation of this phenomenon requires knowledge of different branches of science: nuclear and atomic physics, chemistry and electrochemistry, condensed matter and solid state physics,... The results of this research field can provide a new source of energy, substances and technologies. The puzzle of poor reproducibility of experimental data is due to the fact that LENR occurs in open systems and it is extremely sensitive to parameters of external fields and systems. Classical reproducibility principle should be reconsidered for LENR experiments. Poor reproducibility and unexplained results do not means that the experiment is wrong. Our main conclusions:

  4. Mechanical fault interaction within the Los Angeles Basin: A two-dimensional analysis using mechanical efficiency

    E-Print Network [OSTI]

    Cooke, Michele

    Mechanical fault interaction within the Los Angeles Basin: A two-dimensional analysis using mechanical efficiency Michele L. Cooke Geosciences Department, University of Massachusetts-Amherst, Amherst July 2002. [1] Mechanical models examine deformation within eight different structural cross sections

  5. Solar mechanics thermal response capabilities.

    SciTech Connect (OSTI)

    Dobranich, Dean D.

    2009-07-01

    In many applications, the thermal response of structures exposed to solar heat loads is of interest. Solar mechanics governing equations were developed and integrated with the Calore thermal response code via user subroutines to provide this computational simulation capability. Solar heat loads are estimated based on the latitude and day of the year. Vector algebra is used to determine the solar loading on each face of a finite element model based on its orientation relative to the sun as the earth rotates. Atmospheric attenuation is accounted for as the optical path length varies from sunrise to sunset. Both direct and diffuse components of solar flux are calculated. In addition, shadowing of structures by other structures can be accounted for. User subroutines were also developed to provide convective and radiative boundary conditions for the diurnal variations in air temperature and effective sky temperature. These temperature boundary conditions are based on available local weather data and depend on latitude and day of the year, consistent with the solar mechanics formulation. These user subroutines, coupled with the Calore three-dimensional thermal response code, provide a complete package for addressing complex thermal problems involving solar heating. The governing equations are documented in sufficient detail to facilitate implementation into other heat transfer codes. Suggestions for improvements to the approach are offered.

  6. New mechanism for lightning initiation

    SciTech Connect (OSTI)

    Roussel-Dupre, R.; Buchwald, M.; Gurevich, A. [Lebedev Institute of Physical Sciences, Moscow (Russian Federation)] [and others

    1996-10-01

    This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). To distinguish radio-frequency (rf) signals generated by lightning from the electromagnetic pulse produced by a nuclear explosion, it is necessary to understand the fundamental nature of thunderstorm discharges. The recent debate surrounding the origin of transionospheric pulse pairs (TIPPs) detected by the BLACKBEARD experiment aboard the ALEXIS satellite illustrates this point. We have argued that TIPP events could originate from the upward propagating discharges recently identified by optical images taken from the ground, from airplanes, and from the space shuttle. In addition, the Gamma Ray Observatory (GRO) measurements of x-ray bursts originating from thunderstorms are almost certainly associated with these upward propagating discharges. When taken together, these three measurements point directly to the runaway electron mechanism as the source of the upward discharges. The primary goal of this research effort was to identify the specific role played by the runaway-air-breakdown mechanism in the general area of thunderstorm electricity and in so doing develop lightning models that predict the optical, rf, and x-ray emissions that are observable from space.

  7. Bellcrank mechanisms for Stirling engines

    SciTech Connect (OSTI)

    Senft, J.R.; Senft, V.J.

    1996-12-31

    This paper describes a family of linkage drive systems for Stirling engines containing several new members. These mechanisms are adaptable to all three configurations of Stirling engine, impose minimal side loads on pistons and displacer rods, and include compact forms suitable for pressurized high performance engines. This group of drive systems is generated by a simple common scheme. Near sinusoidal motion is taken from a crankshaft carrying a single crankpin by two connecting rods each driving a bellcrank. The stationary pivots of the bellcranks are located so that their oscillatory motion has the phase angle separation required between the piston and displacer. The bellcranks are further configured to bring the third pin motion to a location suitable for coupling with the piston or displacer of the engine in a way which minimizes side loading. The paper presents a number of new linkage drives from the dual bellcrank family and indicates how they are embodied in beta and alpha type Stirling engines. The paper includes a design for a small multipurpose engine incorporating one of the subject mechanisms.

  8. Mechanical Response of Crystalline Rigid Rod

    E-Print Network [OSTI]

    Goddard III, William A.

    July 1992 Mechanical Response of Crystalline Rigid Rod Polymers: ABPBO and ABPBT Contributors: T and oxidative stability. We used POLYGRAF to study the mechanical response of stiff chain heterocyclic polymers

  9. Mechanical quantum resonators A. N. Cleland

    E-Print Network [OSTI]

    Geller, Michael R.

    Mechanical quantum resonators A. N. Cleland and M. R. Geller Department of Physics, University based on the integration of GHz-frequency mechanical resonators with Josephson phase qubits, which have

  10. Department of Mechanical Engineering Colorado State University

    E-Print Network [OSTI]

    Connors, Daniel A.

    Department of Mechanical Engineering Colorado State University Fall Semester 2013 ME 538 Mechanical,2 Sept 9 Entropy generation Chapter 3 Sept 16 Single Phase Systems Chapter 4 Sept 23 Exergy Analysis

  11. Arthur D. Kuo Dept. of Mechanical Engineering

    E-Print Network [OSTI]

    Arthur D. Kuo Dept. of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann of the swing leg can be largely passive in nature, requiring little muscle activity e.g., Mochon and McMahon 1

  12. UNDERGRADUATE STUDENT MANUAL Department of Mechanical Engineering

    E-Print Network [OSTI]

    DeHon, André

    , or structural mechanics, as well as cross-disciplinary areas as robotics, biomechanics, micro-electromechanical systems (MEMS), and mechanics of materials. Our students are encouraged to do research during their course

  13. 2015 GRADUATE STUDIES ENVIRONMENTAL FLUID MECHANICS

    E-Print Network [OSTI]

    · Climate change and impact assessments Environmental Fluid Mechanics and Hydraulic Engi- neering research generated by winds, landslide, avalanche, or earthquake · Marine Hydrokinetic Energy · Circulation2015 GRADUATE STUDIES ENVIRONMENTAL FLUID MECHANICS AND WATER RESOURCES ENGINEERING RESEARCH AREAS

  14. Institute of Fluid Mechanics and Engineering Acoustics

    E-Print Network [OSTI]

    Berlin,Technische Universität

    Institute of Fluid Mechanics and Engineering Acoustics Large Kundt's tubes Click to insert the image of the facility or test-rig Application area Facility Mechanical Property measurement Physical

  15. Institute of Fluid Mechanics and Engineering Acoustics

    E-Print Network [OSTI]

    Berlin,Technische Universität

    Institute of Fluid Mechanics and Engineering Acoustics Sound Transmission Lab Click to insert the image of the facility or test-rig Application area Facility Mechanical Property measurement Physical

  16. The Performance of a Mechanical Design 'Compiler'

    E-Print Network [OSTI]

    Ward, Allen C.

    1989-01-01

    A mechanical design "compiler" has been developed which, given an appropriate schematic, specifications, and utility function for a mechanical design, returns catalog numbers for an optimal implementation. The compiler ...

  17. AE 419: Aircraft Flight Mechanics Spring 2015

    E-Print Network [OSTI]

    Lee, Tonghun

    AE 419: Aircraft Flight Mechanics Spring 2015 Course Information (Tentative) Instructor: Prof. M. S, cruise, level turn, and energy methods; longitudinal, directional, and lateral static stability graduate hours Textbook: Thomas Yechout, et al. Introduction to Aircraft Flight Mechanics: Performance

  18. Star Products for Relativistic Quantum Mechanics

    E-Print Network [OSTI]

    P. Henselder

    2007-05-24

    The star product formalism has proved to be an alternative formulation for nonrelativistic quantum mechanics. We want introduce here a covariant star product in order to extend the star product formalism to relativistic quantum mechanics in the proper time formulation.

  19. Relativistic mechanics in a general setting

    E-Print Network [OSTI]

    G. Sardanashvily

    2010-05-07

    Relativistic mechanics on an arbitrary manifold is formulated in the terms of jets of its one-dimensional submanifolds. A generic relativistic Lagrangian is constructed. Relativistic mechanics on a pseudo-Riemannian manifold is particularly considered.

  20. Apparatus and method for generating mechanical waves

    DOE Patents [OSTI]

    Allensworth, D.L.; Chen, P.J.

    1982-10-25

    Mechanical waves are generated in a medium by subjecting an electromechanical element to an alternating electric field having a frequency which induces mechanical resonance therein and is below any electrical resonance frequency thereof.

  1. Apparatus and method for generating mechanical waves

    DOE Patents [OSTI]

    Allensworth, Dwight L. (Albuquerque, NM); Chen, Peter J. (Albuquerque, NM)

    1985-01-01

    Mechanical waves are generated in a medium by subjecting an electromechanical element to an alternating electric field having a frequency which induces mechanical resonance therein and is below any electrical resonance frequency thereof.

  2. Skeletal adaptation to reduced mechanical loading

    E-Print Network [OSTI]

    Eliman, Rachel

    2014-01-01

    Bone adapts its mass and architecture in response to its mechanical environment. Yet control of this process by mechanical cues is poorly understood, particularly for unloading. Defining the fundamental mechanoregulation ...

  3. Dept. of Mechanical Engineering 1500 Engineering Dr.

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Dept. of Mechanical Engineering 1500 Engineering Dr. University of Wisconsin ­ Madison Madison, WI. of Mechanical Engineering 2008 ­ Present Director of Engine Research Center 2003 ­ 2007 Associate Professor ­ 1995 Research Assistant Stanford University, Stanford, CA 1984 ­ 1989 Research Engineer Flow Research

  4. College of Engineering ME Mechanical Engineering

    E-Print Network [OSTI]

    MacAdam, Keith

    College of Engineering ME Mechanical Engineering KEY: # = new course * = course changed = course ENGINEERING. (3) This course introduces the Mechanical Engineering profession including the skills and expectations required for success. Engineering applications of calculus are also presented. Prereq or concur

  5. OKLAHOMA STATE UNIVERSITY Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    OKLAHOMA STATE UNIVERSITY Mechanical and Aerospace Engineering Assistant Professor The School of Mechanical and Aerospace Engineering at Oklahoma State University is pleased to invite applications for six. Salary and other compensation are competitive with major research institutions. Oklahoma State University

  6. Doctoral Defense "Thermal-hydro-mechanical model

    E-Print Network [OSTI]

    Kamat, Vineet R.

    Doctoral Defense "Thermal-hydro-mechanical model for freezing and thawing soils" Yao Zhang Date been implemented in a finite element system, with a thermal-hydro- mechanical framework being used

  7. Dynamics of mechanisms with elastic bodies 

    E-Print Network [OSTI]

    Mirzahmedov, Ganijon Ahmedovich

    2001-01-01

    Belt drive mechanisms are alternatives to robotic actuators to obtain complex repetitive motions by simple actuation. By simply changing the dimensions of the mechanism, we can obtain different kinds of trajectories for the exit link...

  8. Elucidating mechanisms of accelerated neurological aging

    E-Print Network [OSTI]

    Greenhall, Jennifer Anne

    2008-01-01

    C. (2005). Mechanisms of aging in senescence- accelerated2.2 Strain-specific aging gene-expression profiles…………………..C. (2005). Mechanisms of aging in senescence-accelerated

  9. Mechanical Characterization of Fuel Injector Piezoactuators and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Characterization of Fuel Injector Piezoactuators and their Piezoceramics Mechanical Characterization of Fuel Injector Piezoactuators and their Piezoceramics 2007 Diesel...

  10. Quantum Mechanics Joachim Burgdorfer and Stefan Rotter

    E-Print Network [OSTI]

    Rotter, Stefan

    1 1 Quantum Mechanics Joachim Burgd¨orfer and Stefan Rotter 1.1 Introduction 3 1.2 Particle and Quantization 8 1.5 Angular Momentum in Quantum Mechanics 9 1.6 Formalism of Quantum Mechanics 12 1.7 Solution 29 1.8.3 Resonances 30 1.9 Semiclassical Mechanics 31 1.9.1 The WKB Approximation 31 1.9.2 The EBK

  11. On a New Form of Quantum Mechanics

    E-Print Network [OSTI]

    N. N. Gorobey; A. S. Lukyanenko

    2008-07-22

    We propose a new form of nonrelativistic quantum mechanics which is based on a quantum version of the action principle.

  12. Mechanical properties of insulators for Accelerator Magnets

    E-Print Network [OSTI]

    McDonald, Kirk

    Mechanical properties of insulators for Accelerator Magnets WAMSDO 14/11/2011 George Ellwood 1 #12 is critical to the composite's performance ·The mechanical performance is dependent on fibre orientation Effects in Resins · Changes in Mechanical properties ­ Particularly matrix dependent properties

  13. A MECHANICAL PROOF OF THE CHURCHROSSER THEOREM

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    A MECHANICAL PROOF OF THE CHURCH­ROSSER THEOREM N. Shankar Technical Report 45 March 1985 Institute and Martin­Lof. The mechanical proof illustrates the effective use of the Boyer­Moore theorem prover in proof of functions and computations. The programming language in which the mechanical proof was formalized, a variant

  14. MECHANICAL & BIOMEDICAL ENGINEERING COURSE PLAN BY SEMESTER

    E-Print Network [OSTI]

    Barrash, Warren

    MECHANICAL & BIOMEDICAL ENGINEERING COURSE PLAN BY SEMESTER STARTING WITH MATH 170 F I R S T Y E A R Fall Semester Spring Semester CHEM 111 College Chemistry 3 ME 105 Mechanical Engineering Graphics MATH 175 Calculus II 4 ENGR 120 Introduction to Engineering 3 PHYS 211 Mechanics, Waves & Heat 4 COMM

  15. MECHANICAL & BIOMEDICAL ENGINEERING COURSE PLAN BY SEMESTER

    E-Print Network [OSTI]

    Barrash, Warren

    MECHANICAL & BIOMEDICAL ENGINEERING COURSE PLAN BY SEMESTER F I R S T Y E A R Fall Semester Spring TOTAL CREDITS 14 S E C O N D Y E A R Fall Semester Spring Semester PHYS 211 Mechanics, Waves, and Heat 4 PHYS 212 Electricity, Magnetism, and Optics 4 PHYS 211L Mechanics, Waves and Heat Lab 1 PHYS 212L

  16. Mechanical and Aerospace Engineering University at Buffalo

    E-Print Network [OSTI]

    Krovi, Venkat

    Mechanical and Aerospace Engineering University at Buffalo S t a t e U n i v e r s i t y o f N e w Y o r k MAE Seminar Series Rotation and Vorticity in Mechanics and Physics Alireza Hadjesfandiari Department of Mechanical and Aerospace Engineering University at Buffalo ah@buffalo.edu Abstract: Rotation

  17. Mechanical Systems with Symmetry, Variational Principles,

    E-Print Network [OSTI]

    Marsden, Jerrold

    Mechanical Systems with Symmetry, Variational Principles, and Integration Algorithms Jerrold E@cds.caltech.edu and Jeffrey M. Wendlandt Mechanical Engineering University of California at Berkeley Berkeley, CA 94720 wents. Birkh¨auser, 1997, 219­261. Abstract This paper studies variational principles for mechanical systems

  18. Mechanisms underlying working memory for novel information

    E-Print Network [OSTI]

    Hasselmo, Michael

    Mechanisms underlying working memory for novel information Michael E. Hasselmo and Chantal E. Stern Cummington St, Boston, MA 02215, USA In this Opinion article we describe a theory that the brain mechanisms modeling indicates that mechanisms for maintaining novel information in working memory could differ from

  19. FLUID MECHANICS AND MATHEMATICAL STRUCTURES PHILIP BOYLAND

    E-Print Network [OSTI]

    Boyland, Philip

    FLUID MECHANICS AND MATHEMATICAL STRUCTURES PHILIP BOYLAND Department of Mathematics University in the most basic models of fluid motion. 1. Introduction Fluid mechanics is the source of many of the ideas, Lagrange, . . .. Mathematicians have abstracted and vastly generalized ba- sic fluid mechanical concepts

  20. Foundations of Fluid Mechanics Giovanni Gallavotti

    E-Print Network [OSTI]

    Roma "La Sapienza", Università di

    1 Foundations of Fluid Mechanics Giovanni Gallavotti 4 Roma 2000 20/novembre/2011; 22:03 #12, harmonic analysis, elasticity, general relativity or fluid mechanics and chaos in turbulence. So that when in 1988 I was made chair of Fluid Mechanics at the Universit`a La Sapienza, not to recognize work I did

  1. Lecture notes Introductory incompressible fluid mechanics

    E-Print Network [OSTI]

    Malham, Simon J.A.

    Lecture notes Introductory incompressible fluid mechanics Simon J.A. Malham Simon J.A. Malham (23rd of fluid mechanics and along the way see lots of interesting applications. 2 Fluid flow, the Continuum. Liquids are generally incompressible--a feature essential to all modern car braking mechanisms. Fluids can

  2. MECH 502: Fluid Mechanics Winter semester 2010

    E-Print Network [OSTI]

    Phani, A. Srikantha

    MECH 502: Fluid Mechanics Winter semester 2010 Instructor: I.A. Frigaard Times: Tuesdays week of semester. Location: CHBE 103 Synopsis: This course will focus primarily on fluid mechanics will be to look at fluid mechanics fundamentals, and at the mathematical modeling & analysis of simplified flow

  3. Montana State University 1 Mechanical Engineering

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Montana State University 1 Mechanical Engineering Technology The mission of the Mechanical Engineering Technology (MET) program is to prepare students for successful Mechanical Engineering to produce graduates with a good foundation in engineering fundamentals as well as one strong in applications

  4. Department of Mechanical Engineering SOGANG UNIVERSITY

    E-Print Network [OSTI]

    Jang, Ju-Wook

    Department of Mechanical Engineering SOGANG UNIVERSITY me.sogang.ac.kr 35( 1) R618 618, the department of Mechanical Engineering in Sogang University has presented itself as one of the fastest leading domestic and international societies of Mechanical Engineering, including the president of Korean

  5. Applications of Automated Mechanism Design Vincent Conitzer

    E-Print Network [OSTI]

    Applications of Automated Mechanism Design Vincent Conitzer Computer Science Department Carnegie University Pittsburgh, PA 15213 Abstract Mechanism design is the art of designing the rules of the game so mechanism design (AMD) [5]. In that paper and in other work, we studied its worst-case com- plexity [5, 6, 7

  6. Introduction to Mechanism Design Mathijs de Weerdt

    E-Print Network [OSTI]

    de Weerdt, Mathijs

    Introduction to Mechanism Design Mathijs de Weerdt Slides loosely based on EASSS tutorial with Paul of Technology December 8, 2009 Mathijs de Weerdt (TUD) Mechanism Design December 8, 2009 1 / 57 #12;Introduction a background on what's (not) possible when designing multiagent systems Mathijs de Weerdt (TUD) Mechanism

  7. 221B Lecture Notes Relativistic Quantum Mechanics

    E-Print Network [OSTI]

    Murayama, Hitoshi

    221B Lecture Notes Relativistic Quantum Mechanics 1 Need for Relativistic Quantum Mechanics We r + dx 1 8 (E2 + B2 ). (1) (Coulomb potential is there only if there is another static charged, similarly to the Newton's equation of motion in mechanics. The initial condtions to solve the Newton

  8. 129 Lecture Notes Relativistic Quantum Mechanics

    E-Print Network [OSTI]

    Murayama, Hitoshi

    129 Lecture Notes Relativistic Quantum Mechanics 1 Need for Relativistic Quantum Mechanics2 ). (1) (Coulomb potential is there only if there is another static charged particle's equation of motion in mechanics. The initial condtions to solve the Newton's equation of motion

  9. Department of Mechanics, Materials and Systems,

    E-Print Network [OSTI]

    Shai, Offer

    , USA Extension of Graph Theory to the Duality Between Static Systems and Mechanisms This paper is a study of the duality between the statics of a variety of structures and the kinematics of mechanisms that impacts engineering, in general 1 , and mechanics, in particular Refs. 2,3 . The duality between statics

  10. 221B Lecture Notes Relativistic Quantum Mechanics

    E-Print Network [OSTI]

    Murayama, Hitoshi

    221B Lecture Notes Relativistic Quantum Mechanics 1 Need for Relativistic Quantum Mechanics We r + dx 1 8 (E2 + B2 ). (1) (Coulomb potential is there only if there is another static charged's equation of motion in mechanics. The initial condtions to solve the Newton's equation of motion

  11. Quantum Mechanics: Structures, Axioms and Paradoxes

    E-Print Network [OSTI]

    Aerts, Diederik

    Quantum Mechanics: Structures, Axioms and Paradoxes Diederik Aerts Center Leo Apostel, Brussels present an analysis of quantum mechanics and its problems and para- doxes taking into account the results a genuine incomplete- ness of standard quantum mechanics, however not an incompleteness that means

  12. Plasticity in Passive Cell Mechanics D. Ambrosia

    E-Print Network [OSTI]

    Ambrosi, Davide

    Plasticity in Passive Cell Mechanics D. Ambrosia , P. Ciarlettab,c a MOX-Dipartimento di Matematica'Alembert, UMR 7190, Universit´e Pierre et Marie Curie - Paris 6 4 place Jusseu, Case 162, 75005 Paris, France c mechanics, plastic hardening 2000 MSC: 74C20, 92C05 1. Introduction The mechanical characterization

  13. Tariq Abdullah Mechanisms for Self-organizing

    E-Print Network [OSTI]

    of task execution or resource consumption. The system level self-organization involves understanding underTariq Abdullah Mechanisms for Self-organizing Ad Hoc Grids #12;#12;Mechanisms for Self Delft, The Netherlands, reservelid Tariq Abdullah Mechanisms for Self-organizing Ad Hoc Grids Delft: TU

  14. Imaging Mechanical Vibrations in Suspended Graphene Sheets

    E-Print Network [OSTI]

    McEuen, Paul L.

    Imaging Mechanical Vibrations in Suspended Graphene Sheets D. Garcia-Sanchez,, A. M. van der Zande was electrostatically driven at resonance using applied radio frequency voltages. The mechanical vibrations were of the shape of the mechanical eigenmodes. In as many as half the resonators measured, we observed a new class

  15. Observation of non-Markovian micro-mechanical Brownian motion

    E-Print Network [OSTI]

    S. Groeblacher; A. Trubarov; N. Prigge; G. D. Cole; M. Aspelmeyer; J. Eisert

    2015-07-28

    All physical systems are to some extent open and interacting with their environment. This insight, basic as it may seem, gives rise to the necessity of protecting quantum systems from decoherence in quantum technologies and is at the heart of the emergence of classical properties in quantum physics. The precise decoherence mechanisms, however, are often unknown for a given system. In this work, we make use of an opto-mechanical resonator to obtain key information about spectral densities of its condensed-matter heat bath. In sharp contrast to what is commonly assumed in high-temperature quantum Brownian motion describing the dynamics of the mechanical degree of freedom, based on a statistical analysis of the emitted light, it is shown that this spectral density is highly non-Ohmic, reflected by non-Markovian dynamics, which we quantify. We conclude by elaborating on further applications of opto-mechanical systems in open system identification.

  16. Is Holographic Entropy and Gravity the result of Quantum Mechanics?

    E-Print Network [OSTI]

    Joakim Munkhammar

    2010-03-09

    In this paper we suggest a connection between quantum mechanics and Verlinde's recently proposed entropic force theory for the laws of Newton. We propose an entropy based on the quantum mechanical probability density distribution. With the assumption that the holographic principle holds we propose that our suggested quantum entropy generalizes the Bekenstein entropy used by Verlinde in his approach. Based on this assumption we suggest that Verlinde's entropic theory of gravity has a quantum mechanical origin. We establish a reformulation of the Newtonian potential for gravity based on this quantum mechanical entropy. We also discuss the notion of observation and the correspondence to classical physics. Finally we give a discussion, a number of open problems and some concluding remarks.

  17. Mechanical response of active gels

    E-Print Network [OSTI]

    T. B. Liverpool; M. C. Marchetti; J. -F. Joanny; J. Prost

    2008-07-18

    We study a model of an active gel of cross-linked semiflexible filaments with additional active linkers such as myosin II clusters. We show that the coupling of the elasticity of the semiflexible filaments to the mechanical properties of the motors leads to contractile behavior of the gel, in qualitative agreement with experimental observations. The motors, however, soften the zero frequency elastic constant of the gel. When the collective motor dynamics is incorporated in the model, a stiffening of the network at high frequencies is obtained. The frequency controlling the crossover between low and high frequency network elasticity is estimated in terms of microscopic properties of motors and filaments, and can be as low as 10^(-3)Hz.

  18. Conjugates, Filters and Quantum Mechanics

    E-Print Network [OSTI]

    Alexander Wilce

    2014-11-18

    The Jordan structure of finite-dimensional quantum theory is derived, in a conspicuously easy way, from a few simple postulates concerning abstract probabilistic models (each defined by a set of basic measurements and a convex set of states). A key assumption is that each system $A$ can be paired with an isomorphic conjugate system, $\\bar{A}$, by means of a non-signaling bipartite state $\\eta_A$ perfectly and uniformly correlating each basic measurement on $A$ with its counterpart on $\\bar{A}$. In the case of a quantum-mechanical system associated with a complex Hilbert space ${\\mathbf H}$, the conjugate system is that associated with the conjugate Hilbert space $\\bar{\\mathbf H}$, and $\\eta_A$ corresponds to the standard maximally entangled EPR state on ${\\mathbf H} \\otimes \\bar{\\mathbf H}$.

  19. Miniature mechanical transfer optical coupler

    DOE Patents [OSTI]

    Abel, Philip (Overland Park, KS); Watterson, Carl (Kansas City, MO)

    2011-02-15

    A miniature mechanical transfer (MT) optical coupler ("MMTOC") for optically connecting a first plurality of optical fibers with at least one other plurality of optical fibers. The MMTOC may comprise a beam splitting element, a plurality of collimating lenses, and a plurality of alignment elements. The MMTOC may optically couple a first plurality of fibers disposed in a plurality of ferrules of a first MT connector with a second plurality of fibers disposed in a plurality of ferrules of a second MT connector and a third plurality of fibers disposed in a plurality of ferrules of a third MT connector. The beam splitting element may allow a portion of each beam of light from the first plurality of fibers to pass through to the second plurality of fibers and simultaneously reflect another portion of each beam of light from the first plurality of fibers to the third plurality of fibers.

  20. Topological mechanics of gyroscopic metamaterials

    E-Print Network [OSTI]

    Lisa M. Nash; Dustin Kleckner; Alismari Read; Vincenzo Vitelli; Ari M. Turner; William T. M. Irvine

    2015-04-17

    Topological mechanical metamaterials are artificial structures whose unusual properties are protected very much like their electronic and optical counterparts. Here, we present an experimental and theoretical study of an active metamaterial -- comprised of coupled gyroscopes on a lattice -- that breaks time-reversal symmetry. The vibrational spectrum of these novel structures displays a sonic gap populated by topologically protected edge modes which propagate in only one direction and are unaffected by disorder. We present a mathematical model that explains how the edge mode chirality can be switched via controlled distortions of the underlying lattice. This effect allows the direction of the edge current to be determined on demand. We envision applications of these edges modes to the design of loss-free, one-way, acoustic waveguides and demonstrate this functionality in experiment.

  1. Plant salt-tolerance mechanisms

    SciTech Connect (OSTI)

    Deinlein, Ulrich; Stephan, Aaron B.; Horie, Tomoaki; Luo, Wei; Xu, Guohua; Schroeder, Julian I.

    2014-06-01

    Crop performance is severely affected by high salt concentrations in soils. To engineer more salt-tolerant plants it is crucial to unravel the key components of the plant salt-tolerance network. Here we review our understanding of the core salt-tolerance mechanisms in plants. Recent studies have shown that stress sensing and signaling components can play important roles in regulating the plant salinity stress response. We also review key Na+ transport and detoxification pathways and the impact of epigenetic chromatin modifications on salinity tolerance. In addition, we discuss the progress that has been made towards engineering salt tolerance in crops, including marker-assisted selection and gene stacking techniques. We also identify key open questions that remain to be addressed in the future.

  2. Eight plane IPND mechanical testing.

    SciTech Connect (OSTI)

    Zhao, A.; Guarino, V.; Wood, K.; Nephew, T.; Ayres, D.; Lee, A.; High Energy Physics; FNAL

    2008-03-18

    A mechanical test of an 8 plane IPND mechanical prototype, which was constructed using extrusions from the testing/tryout of the 16 cell prototype extrusion die in Argonne National Laboratory, was conducted. There were 4 vertical and 4 horizontal planes in this 8 plane IPND prototype. Each vertical plane had four 16 cell extrusions, while each horizontal plane had six 16 cell extrusions. Each plane was glued together using the formulation of Devcon adhesive, Devcon 60. The vertical extrusions used in the vertical planes shares the same dimensions as the horizontal extrusions in the horizontal planes with the average web thickness of 2.1 mm and the average wall thickness of 3.1 mm. This mechanical prototype was constructed with end-seals on the both ends of the vertical extrusions. The gaps were filled with epoxy between extrusions and end-seals. The overall dimension of IPND is 154.8 by 103.1 by 21.7 inches with the weight of approximately 1200 kg, as shown in a figure. Two similar mechanical tests of 3 layer and 11 layer prototypes have been done in order to evaluate the strength of the adhesive joint between extrusions in the NOvA detector. The test showed that the IPND prototype was able to sustain under the loading of weight of itself and scintillator. Two FEA models were built to verify the measurement data from the test. The prediction from FEA slice model seems correlated reasonably well to the test result, even under a 'rough' estimated condition for the wall thickness (from an untuned die) and an unknown property of 'garage type' extrusion. A full size of FEA 3-D model also agrees very well with the test data from strain gage readings. It is worthy to point out that the stress distribution of the structure is predominantly determined by the internal pressure, while the buckling stability relies more on the loading weight from the extrusions themselves and scintillate. Results of conducted internal pressure tests, including 3- cell, 11-cell and the IPND prototypes, have been correlated to the FEA analysis very well. The authors believe they have quite good understanding of response of the NOvA structures subjected to the internal pressure, while the understanding of buckling stability is far behind. Therefore, more effect should be laid to improve the buckling considering that the FEA analysis usually is not able accurately modeling the stability as good as the stress analysis. The IPND structure was mostly built using 'scrape' piece extrusions (whatever available in shop). Therefore, a future test should be more focus on by using a actual real extrusions, for example like Nova -27 (if a final choice is made) and extrusion from a tuned die (very important). The authors should/will repeat 11 layers test with an actual thicker piece for the vertical to verify the adhesive joint and similar large scale prototype with a symmetry case, either 9 or 11 layers with the dial indicator on the both side.

  3. Fundamental mechanisms of micromachine reliability

    SciTech Connect (OSTI)

    DE BOER,MAARTEN P.; SNIEGOWSKI,JEFFRY J.; KNAPP,JAMES A.; REDMOND,JAMES M.; MICHALSKE,TERRY A.; MAYER,THOMAS K.

    2000-01-01

    Due to extreme surface to volume ratios, adhesion and friction are critical properties for reliability of Microelectromechanical Systems (MEMS), but are not well understood. In this LDRD the authors established test structures, metrology and numerical modeling to conduct studies on adhesion and friction in MEMS. They then concentrated on measuring the effect of environment on MEMS adhesion. Polycrystalline silicon (polysilicon) is the primary material of interest in MEMS because of its integrated circuit process compatibility, low stress, high strength and conformal deposition nature. A plethora of useful micromachined device concepts have been demonstrated using Sandia National Laboratories' sophisticated in-house capabilities. One drawback to polysilicon is that in air the surface oxidizes, is high energy and is hydrophilic (i.e., it wets easily). This can lead to catastrophic failure because surface forces can cause MEMS parts that are brought into contact to adhere rather than perform their intended function. A fundamental concern is how environmental constituents such as water will affect adhesion energies in MEMS. The authors first demonstrated an accurate method to measure adhesion as reported in Chapter 1. In Chapter 2 through 5, they then studied the effect of water on adhesion depending on the surface condition (hydrophilic or hydrophobic). As described in Chapter 2, they find that adhesion energy of hydrophilic MEMS surfaces is high and increases exponentially with relative humidity (RH). Surface roughness is the controlling mechanism for this relationship. Adhesion can be reduced by several orders of magnitude by silane coupling agents applied via solution processing. They decrease the surface energy and render the surface hydrophobic (i.e. does not wet easily). However, only a molecular monolayer coats the surface. In Chapters 3-5 the authors map out the extent to which the monolayer reduces adhesion versus RH. They find that adhesion is independent of RH up to a threshold value, depending on the coating chemistry. The mechanism for the adhesion increase beyond this threshold value is that the coupling agent reconfigures from a surface to a bulk phase (Chapter 3). To investigate the details of how the adhesion increase occurs, the authors developed the mechanics for adhesion hysteresis measurements. These revealed that near-crack tip compression is the underlying cause of the adhesion increase (Chapter 4). A vacuum deposition chamber for silane coupling agent deposition was constructed. Results indicate that vapor deposited coatings are less susceptible to degradation at high RH (Chapter 5). To address issues relating to surfaces in relative motion, a new test structure to measure friction was developed. In contrast to other surface micromachined friction test structures, uniform apparent pressure is applied in the frictional contact zone (Chapter 6). The test structure will enable friction studies over a large pressure and dynamic range. In this LDRD project, the authors established an infrastructure for MEMS adhesion and friction metrology. They then characterized in detail the performance of hydrophilic and hydrophobic films under humid conditions, and determined mechanisms which limit this performance. These studies contribute to a fundamental understanding for MEMS reliability design rules. They also provide valuable data for MEMS packaging requirements.

  4. Creep damage mechanisms in composites

    SciTech Connect (OSTI)

    Nutt, S.R.

    1994-10-17

    During the past year, research has focused on processing and characterization of intermetallic composites synthesized by plasma spray deposition. This versatile process allows rapid synthesis of a variety of different composite systems with potential applications for coatings, functionally gradient materials, rapid proto-typing and 3d printing, as well as near-net-shape processing of complex shapes. We have been pursuing an experimental program of research aimed at a fundamental understanding of the microstructural processes involved in the synthesis of intermetallic composites, including diffusion, heat transfer, grain boundary migration, and the dependence of these phenomena on deposition parameters. The work has been motivated by issues arising from composite materials manufacturing technologies. Recent progress is described in section B on the following topics: (1) Reactive atomization and deposition of intermetallic composites (Ni3Al); (2) Reactive synthesis of MoSi2-SiC composites; (3) Mechanical alloying of nanocrystalline alloys; (4) Tensile creep deformation of BMAS glass-ceramic composites.

  5. Technical abstracts: Mechanical engineering, 1990

    SciTech Connect (OSTI)

    Broesius, J.Y.

    1991-03-01

    This document is a compilation of the published, unclassified abstracts produced by mechanical engineers at Lawrence Livermore National Laboratory (LLNL) during the calendar year 1990. Many abstracts summarize work completed and published in report form. These are UCRL-JC series documents, which include the full text of articles to be published in journals and of papers to be presented at meetings, and UCID reports, which are informal documents. Not all UCIDs contain abstracts: short summaries were generated when abstracts were not included. Technical Abstracts also provides descriptions of those documents assigned to the UCRL-MI (miscellaneous) category. These are generally viewgraphs or photographs presented at meetings. An author index is provided at the back of this volume for cross referencing.

  6. Plant salt-tolerance mechanisms

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Deinlein, Ulrich; Stephan, Aaron B.; Horie, Tomoaki; Luo, Wei; Xu, Guohua; Schroeder, Julian I.

    2014-06-01

    Crop performance is severely affected by high salt concentrations in soils. To engineer more salt-tolerant plants it is crucial to unravel the key components of the plant salt-tolerance network. Here we review our understanding of the core salt-tolerance mechanisms in plants. Recent studies have shown that stress sensing and signaling components can play important roles in regulating the plant salinity stress response. We also review key Na+ transport and detoxification pathways and the impact of epigenetic chromatin modifications on salinity tolerance. In addition, we discuss the progress that has been made towards engineering salt tolerance in crops, including marker-assisted selectionmore »and gene stacking techniques. We also identify key open questions that remain to be addressed in the future.« less

  7. Local Power in Quantum Mechanics

    E-Print Network [OSTI]

    Guillermo Albareda; Fabio Lorenzo Traversa; Xavier Oriols

    2015-11-12

    A general expression for the local power of a quantum system is derived. Defined as the time rate of change of the kinetic energy evaluated in a finite volume $\\Omega$ of the physical space, the local power exhibits contributions from both many-body classical and quantum correlations. Significantly, quantum correlations are manifested through the presence of non-local sources/sinks of power and through the action of local forces with no classical counterpart. The soundness of our results is proved along three limits of particular relevance: the closed-system limit ($\\Omega \\to \\infty$), the limit of non-interacting particles, and invoking classicality. Interestingly, we show that quantum fingerprints arise on the local power expression only when the volume $\\Omega$ is finite. Otherwise we recover a classical-like expression. This work could be of particular interest in the field of nanoelectronics, where the realization of a zero-power technology constitutes a long standing challenge.

  8. Mechanical properties of nacre constituents and their impact on mechanical performance

    E-Print Network [OSTI]

    Barthelat, Francois

    Mechanical properties of nacre constituents and their impact on mechanical performance François Barthelat, Chun-Ming Li, Claudia Comi,a) and Horacio D. Espinosab) Department of Mechanical Engineering) The mechanical properties of nacre constituents from red abalone were investigated. Electron microscopy studies

  9. DepartmentofMechanical EngineeringColloquium The Department of Mechanical Engineering

    E-Print Network [OSTI]

    DepartmentofMechanical EngineeringColloquium The Department of Mechanical Engineering PRESENTS Christopher J. Hernandez, Ph.D. Associate Professor Sibley School of Mechanical and Aerospace Engineering. Hernandez is an Associate Professor in the Sibley School of Mechanical and Aerospace Engineering

  10. DepartmentofMechanical EngineeringColloquium The Department of Mechanical Engineering

    E-Print Network [OSTI]

    DepartmentofMechanical EngineeringColloquium The Department of Mechanical Engineering PRESENTS is a Ph.D. candidate at UC Riverside Department of Mechanical Engineering. He received his B.S in Mechanical Engineering at the University of California, Riverside in 2010. Femtosecond Laser Ablation Studies

  11. Washington State University Vancouver Mech 101 Introduction to Mechanical Engineering Mechanical Engineering Fall 2012 Syllabus

    E-Print Network [OSTI]

    Washington State University Vancouver Mech 101 Introduction to Mechanical Engineering Mechanical Engineering Fall 2012 Syllabus 1 Introduction to Mechanical Engineering Course: Mech 101, Introduction to Mechanical Engineering, 2 Credits Prerequisite: None Instructor: Dr. Yoon Jo Kim Office: VECS 301Q Phone

  12. Mechanics and mechanisms of fatigue damage and crack growth in advanced materials

    E-Print Network [OSTI]

    Ritchie, Robert

    Mechanics and mechanisms of fatigue damage and crack growth in advanced materials R.O. Ritchie*, C 94720-1760, USA Abstract The mechanisms of fatigue-crack propagation in ceramics and intermetallics growth is considered to be a mutual competition between intrinsic mechanisms of crack advance ahead

  13. MSME in Solid Mechanics Research is conducted in analytical, computational and experimental solid mechanics

    E-Print Network [OSTI]

    Feeny, Brian

    MSME in Solid Mechanics Research is conducted in analytical, computational and experimental solid mechanics including theory of elasticity, fastening and joining, experimental mechanics and optical strain measurement, impact and crashworthiness. MS Track for Solid Mechanics The MSME degree program for solid

  14. Mechanics of Contact and Lubrication, ME5656 Department of Mechanical & Industrial Engineering

    E-Print Network [OSTI]

    Müftü, Sinan

    Mechanics of Contact and Lubrication, ME5656 Department of Mechanical & Industrial Engineering Northeastern University Fall 2009 MECHANICS AND TRIBOLOGY OF THIN COATINGS (FILMS) Qian R. Sheng Northeastern University sheng.q@husky.neu.edu Abstract The investigation on mechanics and tribology of thin-film coatings

  15. Mechanism(s) of cell Nucleation and Growth in Foam Injection Molding through Visualization

    E-Print Network [OSTI]

    Milgram, Paul

    Mechanism(s) of cell Nucleation and Growth in Foam Injection Molding through Visualization Research field: Mechanism(s) of cell Nucleation and Growth in Foam Injection Molding through Visualization Equipment/materials: Injection Molding Machine, Visualization Mold, High-speed Camera, Thermoplastics

  16. Remark on laser linewidth hazard in opto-mechanical cooling

    E-Print Network [OSTI]

    Lajos Diósi

    2008-07-23

    I discuss the robustness of the pumped cavity dynamics against phase diffusion of the laser and conclude that opto-mechanical cooling has extreme sensitivity compared to laser cooling of atoms. Certain proposals of ground state opto-mechanical cooling by single cavity would require an unrealistic sharp laser linewidth or equivalently, a very low level of phase noise. A systematic way to cancel classical excess phase noise is the interferometric twin-cavity pumping, initiated for optically trapped macro-mirrors of future gravitational-wave detectors.

  17. A quantum mechanical description of particle spin rotation in channeling

    SciTech Connect (OSTI)

    Silenko, A.Ya.

    1995-04-01

    Spin rotation of spin-1/2 particles involved in planar channeling in straight and bent crystals is described in a consistent quantum mechanical manner. This is done by solving the Dirac equation in the Foldy-Wouthuysen representation, constructing an operator equation of motion for the spin, and calculating the average value of the spin precession frequency. For the case of channeling in bent crystals agreement is observed between the classical and quantum mechanical expressions, provided that the field of the planes is approximated by a harmonic potential. The effect of spin rotation in straight crystals is also examined. 17 refs.

  18. Fractional Calculus for Continuum Mechanics - anisotropic non-locality

    E-Print Network [OSTI]

    Wojciech Sumelka

    2015-02-06

    In this paper the generalisation of previous author's formulation of fractional continuum mechanics to the case of anisotropic non-locality is presented. The considerations include the review of competitive formulations available in literature. The overall concept bases on the fractional deformation gradient which is non-local, as a consequence of fractional derivative definition. The main advantage of the proposed formulation is its analogical structure to the general framework of classical continuum mechanics. In this sense, it allows, to give similar physical and geometrical meaning of introduced objects.

  19. The Hamilton-Jacobi Theory, Quantum Mechanics and General Relativity

    E-Print Network [OSTI]

    B. G. Sidharth

    2005-10-12

    The Hamilton-Jacobi theory of Classical Mechanics can be extended in a novel manner to systems which are fuzzy in the sense that they can be represented by wave functions. A constructive interference of the phases of the wave functions then gives us back Classical systems. In a suitable description this includes both Quantum Theory and General Relativity in the well known superspace formulation. However, there are several nuances which provide insight into these latter systems. All this is considered in this paper together with suitable generalization, to cascades of super universes.

  20. Understanding Mechanisms of Radiological Contamination

    SciTech Connect (OSTI)

    Rick Demmer; John Drake; Ryan James, PhD

    2014-03-01

    Over the last 50 years, the study of radiological contamination and decontamination has expanded significantly. This paper addresses the mechanisms of radiological contamination that have been reported and then discusses which methods have recently been used during performance testing of several different decontamination technologies. About twenty years ago the Idaho Nuclear Technology Engineering Center (INTEC) at the INL began a search for decontamination processes which could minimize secondary waste. In order to test the effectiveness of these decontamination technologies, a new simulated contamination, termed SIMCON, was developed. SIMCON was designed to replicate the types of contamination found on stainless steel, spent fuel processing equipment. Ten years later, the INL began research into methods for simulating urban contamination resulting from a radiological dispersal device (RDD). This work was sponsored by the Defense Advanced Research Projects Agency (DARPA) and included the initial development an aqueous application of contaminant to substrate. Since 2007, research sponsored by the US Environmental Protection Agency (EPA) has advanced that effort and led to the development of a contamination method that simulates particulate fallout from an Improvised Nuclear Device (IND). The IND method diverges from previous efforts to create tenacious contamination by simulating a reproducible “loose” contamination. Examining these different types of contamination (and subsequent decontamination processes), which have included several different radionuclides and substrates, sheds light on contamination processes that occur throughout the nuclear industry and in the urban environment.