cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Closed-loop targeted optogenetic stimulation of C. elegans populations
Creators: name: Liu, Mochi
name: Kumar, Sandeep
name: Sharma, Anuj K
name: Leifer, Andrew M
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We present a high-throughput optogenetic illumination system capable of simultaneous closed-loop light delivery to specified targets in populations of moving Caenorhabditis elegans. The instrument addresses three technical challenges: it delivers targeted illumination to specified regions of the animal's body such as its head or tail; it automatically delivers stimuli triggered upon the animal's behavior; and it achieves high throughput by targeting many animals simultaneously. The instrument was used to optogenetically probe the animal's behavioral response to competing mechanosensory stimuli in the the anterior and posterior soft touch receptor neurons. Responses to more than $10^4$ stimulus events from a range of anterior-posterior intensity combinations were measured. The animal's probability of sprinting forward in response to a mechanosensory stimulus depended on both the anterior and posterior stimulation intensity, while the probability of reversing depended primarily on the posterior stimulation intensity. We also probed the animal's response to mechanosensory stimulation during the onset of turning, a relatively rare behavioral event, by delivering stimuli automatically when the animal began to turn. Using this closed-loop approach, over $10^3$ stimulus events were delivered during turning onset at a rate of 9.2 events per worm-hour, a greater than 25-fold increase in throughput compared to previous investigations. These measurements validate with greater statistical power previous findings that turning acts to gate mechanosensory evoked reversals. Compared to previous approaches, the current system offers targeted optogenetic stimulation to specific body regions or behaviors with many-fold increases in throughput to better constrain quantitative models of sensorimotor processing.
description: 35 pages, 8 main text figures; 4 supplementary figures
Delta F=2 Observables and Fine-Tuning in a Warped Extra Dimension with Custodial Protection
Creators: name: Blanke, Monika
name: Buras, Andrzej J.
name: Duling, Bjoern
name: Gori, Stefania
name: Weiler, Andreas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a complete study of Delta S = 2 and Delta B = 2 processes in a warped extra dimensional model with a custodial protection of Z b_L bar b_L, including epsilon_K, Delta M_K, Delta M_s, Delta M_d, A^q_SL, Delta Gamma_q, A_CP(B_d -> psi K_S) and A_CP(B_s -> psi phi). These processes are affected by tree level contributions from Kaluza-Klein gluons, the heavy KK photon, new heavy electroweak gauge bosons Z_H and Z', and in principle by tree level Z contributions. We confirm recent findings that the fully anarchic approach where all the hierarchies in quark masses and weak mixing angles are geometrically explained seems implausible and we confirm that the KK mass scale M_KK generically has to be at least ~20TeV to satisfy the epsilon_K constraint. We point out, however, that there exist regions in parameter space with only modest fine-tuning in the 5D Yukawa couplings which satisfy all existing Delta F = 2 and electroweak precision constraints for scales M_KK ~3TeV in reach of the LHC. Simultaneously we find that A_CP(B_s -> psi phi) and A^s_SL can be much larger than in the SM as indicated by recent results from CDF and D0 data. We point out that for B_{d,s} physics Delta F = 2 observables the complex (Z_H,Z') can compete with KK gluons, while the tree level Z and KK photon contributions are very small. In particular we point out that the Z d^i_L bar d^j_L couplings are protected by the custodial symmetry. As a by-product we show the relation of the RS flavour model to the Froggatt-Nielsen mechanism and we provide analytic formulae for the effective flavour mixing matrices in terms of the fundamental 5D parameters.
description: 51 pages, 14 figures, 4 tables. v2: Discussion of Higgs FCNCs added, discussion of protection of Z couplings extended, some comments added, conclusions unchanged. v3: layout problem fixed
Minimum cost mirror sites using network coding: Replication vs. coding at the source nodes
Creators: name: Huang, Shurui
name: Ramamoorthy, Aditya
name: Medard, Muriel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Content distribution over networks is often achieved by using mirror sites that hold copies of files or portions thereof to avoid congestion and delay issues arising from excessive demands to a single location. Accordingly, there are distributed storage solutions that divide the file into pieces and place copies of the pieces (replication) or coded versions of the pieces (coding) at multiple source nodes. We consider a network which uses network coding for multicasting the file. There is a set of source nodes that contains either subsets or coded versions of the pieces of the file. The cost of a given storage solution is defined as the sum of the storage cost and the cost of the flows required to support the multicast. Our interest is in finding the storage capacities and flows at minimum combined cost. We formulate the corresponding optimization problems by using the theory of information measures. In particular, we show that when there are two source nodes, there is no loss in considering subset sources. For three source nodes, we derive a tight upper bound on the cost gap between the coded and uncoded cases. We also present algorithms for determining the content of the source nodes.
description: IEEE Trans. on Information Theory (to appear), 2010
Assessment of Three Databases for the NASA Seven-Coefficient Polynomial Fits for Calculating Thermodynamic Properties of Individual Species
Creators: name: Marzouk, Osama A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences
subject: G.1.10
subject: 65D10

description: This work considers the seven-coefficient polynomials proposed by the National Aeronautics and Space Administration (NASA) to facilitate obtaining a normalized value for three thermodynamic standard-state specific properties of ideal gases or condenser matters over an interval of temperature. These properties are the heat capacity at constant pressure, the absolute enthalpy (sensible enthalpy plus heat contents due to chemical or physical changes), and the entropy. In the open literature, one can find several databases for the polynomial coefficients with variation in the number of species included or the range of temperature covered, and this raises a question of whether the choice of a database to use has an important impact on these evaluated thermodynamic properties. Addressing this point, we compare and assess three databases for the NASA 7-coefficient polynomials, over a selected range of temperature from 300 K to 3500 K, and for selected six common gaseous species encountered in combustion or industrial processes, which are molecular oxygen (O2), molecular nitrogen (N2), molecular hydrogen (H2), methane (CH4), carbon dioxide (CO2), and water vapor (H2O). Our comparisons suggest that despite the difference in the values of coefficients, there is no significant difference in their predictions. However, the latest (7th edition) database of Prof. Alexander Burcat hosted at Eötvös Loránd University (ELTE) in Budapest, Hungary showed superior features when contrasted to other two databases (one accompanying the simulation package OpenFOAM 6, and another provided by the natural-gas reaction mechanism GRI-MECH 3.0).
Temperature effect on the cardiac ryanodine receptor gating and conductance: mathematical modelling
Creators: name: Moskvin, A. S.
name: Iaparov, B. I.
name: Ryvkin, A. M.
name: Solovyova, O. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The temperature effect on the cardiac ryanodine receptor (RyR) function has been studied within the electron-conformational (EC) model. It is shown that simple EC model with the Arrhenius like temperature dependence of "internal" and "external" frictions and a specific thermosensitivity of the tunnelling "open - close" transitions can provide both qualitative and quantitative description of the temperature effects for isolated RyRs. The potential of the model was illustrated by explaining the experimental data on the temperature dependence of sheep's isolated cardiac RyR gating and conductance (R. Sitsapesan et al., J Physiol 434, 469 (1991)).
description: 19 pages, 6 figures
Primordial non-gaussianity, statistics of collapsed objects, and the Integrated Sachs-Wolfe effect
Creators: name: Afshordi, Niayesh
name: Tolley, Andrew J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Any hint of non-gaussianity in the cosmological initial conditions will provide us with a unique window into the physics of early universe. We show that the impact of a small local primordial non-gaussianity (generated on super-horizon scales) on the statistics of collapsed objects (such as galaxies or clusters) can be approximated by using slightly modified, but gaussian, initial conditions, which we describe through simple analytic expressions. Given that numerical simulations with gaussian initial conditions are relatively well-studied, this equivalence provides us with a simple tool to predict signatures of primordial non-gaussianity in the statistics of collapsed objects. In particular, we describe the predictions for non-gaussian mass function, and also confirm the recent discovery of a non-local bias on large scales (arXiv:0710.4560, arXiv:0801.4826) as a signature of primordial non-gaussianity. We then study the potential of galaxy surveys to constrain non-gaussianity using their auto-correlation and cross-correlation with the CMB (due to the Integrated Sachs-Wolfe effect), as a function of survey characteristics, and predict that they will eventually yield an accuracy of Delta f_{NL} ~ 0.1 and 3 respectively, which will be better than or competitive with (but independent of) the best predicted constraints from the CMB. Interestingly, the cross-correlation of CMB and NVSS galaxy survey already shows a hint of a large local primordial non-gaussianity: f_{NL} = 236 +/- 127.
description: 12 pages, 10 figures, added references, submitted to PRD
Malleable Sorting
Creators: name: Flick, Patrick
name: Sanders, Peter
name: Speck, Jochen
Publisher: name: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2013

description: Malleable jobs can adapt to varying degrees of available parallelism. This is an interesting approach to more flexible usage of parallel resources. For example, malleable jobs can be scheduled optimally and efficiently where more restricted forms of parallel jobs are NP-hard to handle. However, little work has been done on how to make fundamental computations malleable. We study how this can be done for sorting. Our algorithm is an adaptive version of Multiway Merge Sort and outperforms a state-of-the art implementation in the multi core STL when the number of available cores fluctuates.
Swift J011511.0-725611: Discovery of a rare Be Star / White Dwarf binary system in the SMC
Creators: name: Kennea, J. A.
name: Coe, M. J.
name: Evans, P. A.
name: Townsend, L. J.
name: Campbell, Z. A.
name: Udalski, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the discovery of Swift J011511.0-725611, a rare Be X-ray binary system (BeXRB) with a White Dwarf (WD) compact object, in the Small Magellanic Cloud (SMC) by S-CUBED, a weekly X-ray/UV survey of the SMC by the Neil Gehrels Swift Observatory. Observations show an approximately 3 month outburst from Swift J011511.0-725611, the first detected by S-CUBED since it began in 2016 June. Swift J011511.0-725611 shows super-soft X-ray emission, indicative of a White Dwarf compact object, which is further strengthened by the presence of an 0.871 keV edge, commonly attributed to O viii K-edge in the WD atmosphere. Spectroscopy by SALT confirms the Be nature of the companion star, and long term light-curve by OGLE finds both the signature of a circumstellar disk in the system at outburst time, and the presence of a 17.4 day periodicity, likely the orbital period of the system. Swift J011511.0-725611 is suggested to be undergoing a Type-II outburst, similar to the previously reported SMC Be White Dwarf binary (BeWD), Swift J004427.3-734801. It is likely that the rarity of known BeWD is in part due to the difficulty in detecting such outbursts due to both their rarity, and their relative faintness compared to outbursts in Neutron Star BeXRBs.
description: 8 pages, 10 figures, accepted for publication in MNRAS
Toy models for wrapping effects
Creators: name: Penedones, Joao
name: Vieira, Pedro
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The anomalous dimensions of local single trace gauge invariant operators in N=4 supersymmetric Yang-Mills theory can be computed by diagonalizing a long range integrable Hamiltonian by means of perturbative asymptotic Bethe ansatz. This formalism breaks down when the number of fields of the composite operator is smaller than the range of the Hamiltonian which coincides with the order in perturbation theory at study. We analyze two spin chain toy models which might shed some light on the physics behind these wrapping effects. One of them, the Hubbard model, is known to be closely related to N=4 SYM. In this example, we find that the knowledge of the effective spin chain description is insufficient to reconstruct the finite size effects of the underlying electron theory. We compute the wrapping corrections for generic states and relate them to a Luscher like approach. The second toy models are long range integrable Hamiltonians built from the standard algebraic Bethe anstatz formalism. This construction is valid for any symmetry group. In particular, for non-compact groups it exhibits an interesting relation between wrapping interactions and transcendentality.
description: 39 pages, 5 figures
Additional file 1 of Understanding and exploiting the fatty acid desaturation system in Rhodotorula toruloides
Creators: name: Liu, Yanbin
name: Koh, Chong Mei John
name: Yap, Sihui Amy
name: Cai, Lin
name: Ji, Lianghui
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Additional tables and figures.
The formative stages of Edouard Vuillard, 1886-1893
Creators: name: Duggan, Deena Clare
Publisher: name: University of British Columbia
Year: 2010

description: Edouard Vuillard officially joined the radical group of young painters known as the Nabis in 1889- However, the mature style he developed by 1893 seems to bear little relationship to the kind of painting they advocated. This paper attempts to clarify Vuillard's artistic debt to the Nabis through a close examination of selected works from his formative stages 1886-1893. Chapter One considers Vuillard's student years, 1886-1890, showing the conventional nature of his artistic training, and revealing, by his visual reference to Chardin, an early inclination towards a quiet art of intimate scenes. During this same time, Vuillard established his association with the Nabis, which prompted some cautious experiments with their Ideas, veiled by naturalistic appearances. Chapter Two concerns Vuillard's experimental stage of 1890-1893-His artistic consideration of Nabi ideas was boldly evident at first, but his attention was soon attracted both by the works of recent avant-garde painters and by Japanese ukiyo-e prints, as well. In his formative stages, Vuillard developed formal means to synthesize the aesthetic approach he derived from the Nabis with his preference for an art of quiet intimacy. By 1893, he had married these in a delicate harmony, and achieved the very distinctive, personal style for which he is known.
title: CERN Yellow Reports: Monographs, Vol. 2 (2024): Interim report for the International Muon Collider Collaboration
title: Interim report for the International Muon Collider Collaboration
titleType: AlternativeTitle
Creators: name: CERN Yellow Reports: Monographs
Publisher: name: CERN Yellow Reports: Monographs
Year: 2024

description: This document summarises the International Muon Collider Collaboration (IMCC)
progress and status of the Muon Collider R&D programme.
Transverse momentum analysis of collective motion in relativistic nuclear collisions
Creators: name: Danielewicz, P.
name: Odyniec, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Novel transverse-momentum technique is used to analyse charged-particle exclusive data for collective motion in the Ar+KCl reaction at 1.8 GeV/nucl. Previous analysis of this reaction, employing the standard sphericity tensor, revealed no significant effect. In the present analysis, collective effects are observed, and they are substantially stronger than in the Cugnon cascade model, but weaker than in the hydrodynamical model.
description: Preprint version, serving as a reference for another work (14 pages, 3 figures). This version contains, in particular, calculation of second-order azimuthal moments of particle distributions, in the elements of the sphericity tensor, not in the journal. The editor insisted on shortening of the paper, while the referee insisted on additional explanations, so something had to go
Observing photonic de Broglie waves without the NOON state
Creators: name: Kwon, Osung
name: Ra, Young-Sik
name: Kim, Yoon-Ho
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The photonic de Broglie wave, in which an ensemble of $N$ identical photons with wavelength $λ$ reveals $λ/N$ interference fringes, has been known to be a unique feature exhibited by the photon number-path entangled state or the NOON state. Here, we report the observation of the photonic de Broglie wave for a pair of photons, generated by spontaneous parametric down-conversion, that are not photon number-path entangled. We also show that the photonic de Broglie wave can even be observed for a pair of photons that are completely separable (i.e., no entanglement in all degrees of freedom) and distinguishable. The experimental and theoretical results suggest that the photonic de Broglie wave is, in fact, not related to the entanglement of the photons, rather it is related to the indistinguishable pathways established by the measurement scheme.
description: 9 pages, 6 figures
Driven and Decaying Turbulence Simulations of Low-Mass Star Formation: From Clumps to Cores to Protostars
Creators: name: Offner, Stella S. R.
name: Klein, Richard I.
name: McKee, Christopher F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Molecular clouds are observed to be turbulent, but the origin of this turbulence is not well understood. As a result, there are two different approaches to simulating molecular clouds, one in which the turbulence is allowed to decay after it is initialized, and one in which it is driven. We use the adaptive mesh refinement (AMR) code, Orion, to perform high-resolution simulations of molecular cloud cores and protostars in environments with both driven and decaying turbulence. We include self-gravity, use a barotropic equation of state, and represent regions exceeding the maximum grid resolution with sink particles. We analyze the properties of bound cores such as size, shape, linewidth, and rotational energy, and we find reasonable agreement with observation. At high resolution, the different rates of core accretion in the two cases have a significant effect on protostellar system development. Clumps forming in a decaying turbulence environment produce high-multiplicity protostellar systems with Toomre-Q unstable disks that exhibit characteristics of the competitive accretion model for star formation. In contrast, cores forming in the context of continuously driven turbulence and virial equilibrium form smaller protostellar systems with fewer low-mass members. Our simulations of driven and decaying turbulence show some statistically significant differences, particularly in the production of brown dwarfs and core rotation, but the uncertainties are large enough that we are not able to conclude whether observations favor one or the other.
description: 16 pages, 17 figures, accepted to ApJ
ADAPT: Mitigating Idling Errors in Qubits via Adaptive Dynamical Decoupling
Creators: name: Das, Poulami
name: Tannu, Swamit
name: Dangwal, Siddharth
name: Qureshi, Moinuddin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The fidelity of applications on near-term quantum computers is limited by hardware errors. In addition to errors that occur during gate and measurement operations, a qubit is susceptible to idling errors, which occur when the qubit is idle and not actively undergoing any operations. To mitigate idling errors, prior works in the quantum devices community have proposed Dynamical Decoupling (DD), that reduces stray noise on idle qubits by continuously executing a specific sequence of single-qubit operations that effectively behave as an identity gate. Unfortunately, existing DD protocols have been primarily studied for individual qubits and their efficacy at the application-level is not yet fully understood. Our experiments show that naively enabling DD for every idle qubit does not necessarily improve fidelity. While DD reduces the idling error-rates for some qubits, it increases the overall error-rate for others due to the additional operations of the DD protocol. Furthermore, idling errors are program-specific and the set of qubits that benefit from DD changes with each program. To enable robust use of DD, we propose Adaptive Dynamical Decoupling (ADAPT), a software framework that estimates the efficacy of DD for each qubit combination and judiciously applies DD only to the subset of qubits that provide the most benefit. ADAPT employs a Decoy Circuit, which is structurally similar to the original program but with a known solution, to identify the DD sequence that maximizes the fidelity. To avoid the exponential search of all possible DD combinations, ADAPT employs a localized algorithm that has linear complexity in the number of qubits. Our experiments on IBM quantum machines (with 16-27 qubits) show that ADAPT improves the application fidelity by 1.86x on average and up-to 5.73x compared to no DD and by 1.2x compared to DD on all qubits.
description: 16 Figures, 5 Tables
The study on the properties of AISI 4140 and AISI 1040 steel rods welded by friction welding
Creators: name: Thanee Toomprasen
name: Chawalit Thinvongpituk
name: Sukangkana Talangkun
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2014
Subjects: Friction welding, Medium carbon steel, Low alloy Steel, Strength of joint

description: 2, 41, KKU Engineering Journal
Lloyd George and the Turkish question : an examination of Lloyd George’s Turkish policy, 1918-1922
Creators: name: Hind, Joseph Winton
Publisher: name: University of British Columbia
Year: 2010

description: The events in Turkey in the years 1918 to 1922 are covered by a variety of works. Lloyd George's, part in these events has received some attention, but most writers either refer to his role only briefly as part of a general study of the post-war Middle East or focus on a small part of the four year period. No comprehensive study of Lloyd George's Turkish policy has yet been written. This thesis examines the motivations behind and the execution of Lloyd George's post-First World War Turkish policy. The main sources for this study have been the private papers of government ministers and functionaries, published government documents and various books and articles. A chronological structure has been employed. By the end of the First World War, the Ottoman Empire and Imperial Russia no longer existed. This required a revision of traditional British policies for the Eastern Mediterranean. The modification in British policy and the course of the war are outlined in Chapter Two, as is Lloyd. George's part in forming that policy. The origins of his attitude towards Greece and Turkey are also examined here. The course of events in post-war Turkey may be divided into four distinct periods. The first period, from the signing of the Mudros Armistice on 30 October 1918 to the Greek landings at Smyrna on 19 May 1919, is covered in Chapter III. The negotiations which led to the Treaty of Sèvres--negotiations in which Lloyd George played so important a role—are examined in the fourth chapter. Chapter Five explores the period from August 1920 to September 1922. During this time, Lloyd George's Turkish policy was to pass from the peak of success at Sèvres to total ruin with the defeat of the Greeks by the Turkish Nationalists. The final debacle--the confrontation between the Turkish Nationalists and the British garrison at Chanak and its effects on Lloyd George's career are examined in Chapter VI. In the final chapter an attempt is made to determine the foundations and manner of executing Lloyd George's Turkish policy.
Quantum fluctuations and condensate fraction during the time-of-flight expansion
Creators: name: Fang, Shiang
name: Lee, Ray-Kuang
name: Wang, Daw-Wei
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The quantum fluctuation effects in the time-of-flight (TOF) experiment for a condensate released from an optical lattice potential is studied within the truncated Wigner approximation. By investigating both the spatial and momentum density distributions, we find that the condensate fraction decreases monotonically in time and hence cannot be measured in the standard TOF image. We then propose a semi-quantitative analysis for such dynamical quantum depletion process. Our study shows a universal algebraic decay of the true condensate fraction, and have a very good agreement with numerical results. We also discuss possible methods to determine the condensate fraction inside the optical lattice, and its implication to the TOF experiments in higher dimensional systems.
description: 4 pages and 3 figures, the same as the published version
Activity of Pd$_{\rm n}$ (n = 1-5) Clusters on Alumina Film on Ni$_3$Al(111) for CO Oxidation: A Molecular Beam Study
Creators: name: Sitja, Georges
name: Henry, Claude
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Single atom catalyst (SAC) is a vivid new area of research in catalysis. However, the activity in CO oxidation of isolated Pt or Pd atoms, generally supported on an oxide powder, is still controversial. Furthermore, the steady state activity of few atoms clusters is still not yet quantitatively known. In this work we study, by molecular beam reactive scattering (MBRS), the activity of Pd$_{\rm n}$ ($n$ = 1-5) clusters, grown on a nanostructured alumina films on a Ni$_3$Al(111) surface. It is shown that the single atoms are not active at 473 K but they diffuse and coalesce at 533K forming larger clusters. The activity of a cluster is proportional to the number of atoms it contains (n=2-5). At 533 K, the activity per (surface-) atom, which is the turnover frequency (TOF), is constant. Its value is close to those obtained for large clusters of 181$\pm$13 atoms and Pd (111) extended surfaces, in the same experimental conditions.
Problems of hospital administration
Creators: name: Granberg, Margaret M.
Publisher: name: University of Oregon
Year: 1940
Subjects: Hospital Administration
Hospitals

description: The hospital is an extremely complex organization. It deals with human lives and services which must be given away if individuals are unable to pay. All who need services of the hospital could be considered abnormal, physically or mentally or both. Friends and relatives of patients are often even more difficult to deal with and many are entirely unfamiliar with hospitals until services are needed. No problems could be more complicated than those arising out of such circumstances, and many new problems arise every day. A few of these more common problems will be discussed in this outline and, to this end, administrators must have complete sympathetic understanding of staff problems so institutions can function to the fullest degree.
Spin squeezing and entanglement
Creators: name: Toth, Geza
name: Knapp, Christian
name: Gühne, Otfried
name: Briegel, Hans J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: What is the relation between spin squeezing and entanglement? To clarify this, we derive the full set of generalized spin squeezing inequalities for the detection of entanglement. These are inequalities for the mean values and variances of the collective angular momentum components J_k. They can be used for the experimental detection of entanglement in a system of spin-1/2 particles in which the spins cannot be individually addressed. We present various sets of inequalities that can detect all entangled states that can be detected based on the knowledge of: (i) the mean values and variances of J_k in three orthogonal directions, or (ii) the variances of J_k in three orthogonal directions, or (iii) the mean values of J_k^2 in three orthogonal directions or (iv) the mean values and variances of J_k in arbitrary directions. We compare our inequalities to known spin squeezing entanglement criteria and discuss to which extent spin squeezing is related to entanglement in the reduced two-qubit states. Finally, we apply our criteria for the detection of entanglement in spin models, showing that they can be used to detect bound entanglement in these systems.
description: 13 pages including 6 figures and 2 tables, revtex4; v3: published version
Probing the Theoretical and Computational Limits of Dissipative Design
Creators: name: Chennakesavalu, Shriram
name: Rotskoff, Grant M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Self-assembly, the process by which interacting components form well-defined and often intricate structures, is typically thought of as a spontaneous process arising from equilibrium dynamics. When a system is driven by external \emph{nonequilibrium} forces, states statistically inaccessible to the equilibrium dynamics can arise, a process sometimes termed direct self-assembly. However, if we fix a given target state and a set of external control variables, it is not well-understood i) how to design a protocol to drive the system towards the desired state nor ii) the energetic cost of persistently perturbing the stationary distribution. Here we derive a bound that relates the proximity to the chosen target with the dissipation associated with the external drive, showing that high-dimensional external control can guide systems towards target distribution but with an inevitable entropic cost. Remarkably, the bound holds arbitrarily far from equilibrium. Secondly, we investigate the performance of deep reinforcement learning algorithms and provide evidence for the realizability of complex protocols that stabilize otherwise inaccessible states of matter.
Internal friction as possible key factor governing the thermosensitivity of TRP channels
Creators: name: Okenov, A. O.
name: Iaparov, B. I.
name: Moskvin, A. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Six thermo-activated transient receptor potential (TRP) channels are the molecular basis of the thermosensation for mammals. But the molecular source of their gating remains unknown. In the Letter, we suggest a physically based model for the TRP channels and show that the temperature dependence of the "internal friction" can be a key factor governing the ion channels gating. Results of the computer modeling allowed us to successfully reproduce the experimental data for the open probability Popen of the TRPV1 and TRPM8 channels at different temperatures and voltages.
description: 6 pages, 3 figures
Dynamical Study of Polydisperse Hard-Sphere System
Creators: name: Nogawa, Tomoaki
name: Ito, Nobuyasu
name: Watanabe, Hiroshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the interplay between the fluid-crystal transition and the glass transition of elastic sphere system with polydispersity using nonequilibrium molecular dynamics simulations. It is found that the end point of the crystal-fluid transition line, which corresponds to the critical polydispersity above which the crystal state is unstable, is on the glass transition line. This means that crystal and fluid states at the melting point becomes less distinguishable as polydispersity increases and finally they become identical state, i.e., marginal glass state, at critical polydispersity.
description: 5 pages, 5 figures
Evolutionary drivers, morphological evolution and diversity dynamics of a surviving mammal clade: cainotherioids at the Eocene--Oligocene transition
Creators: name: Weppe, R.
name: Orliac, Maëva
name: Guinot, G.
name: Condamine, Fabien L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: The Eocene--Oligocene transition (EOT) represents a period of global environmental changes particularly marked in Europe and coincides with a dramatic biotic turnover. Here, using an exceptional fossil preservation, we document and analyse the diversity dynamics of a mammal clade, Cainotherioidea (Artiodactyla), that survived the EOT and radiated rapidly immediately after. We infer their diversification history from Quercy Konzentrat--Lagerst{ä}tte (south-west France) at the species level using Bayesian birth--death models. We show that cainotherioid diversity fluctuated through time, with extinction events at the EOT and in the late Oligocene, and a major speciation burst in the early Oligocene. The latter is in line with our finding that cainotherioids had a high morphological adaptability following environmental changes throughout the EOT, which probably played a key role in the survival and evolutionary success of this clade in the aftermath. Speciation is positively associated with temperature and continental fragmentation in a time-continuous way, while extinction seems to synchronize with environmental change in a punctuated way. Within-clade interactions negatively affected the cainotherioid diversification, while inter-clade competition might explain their final decline during the late Oligocene. Our results provide a detailed dynamic picture of the evolutionary history of a mammal clade in a context of global change.
Film and Domestic Space: Architectures, Representations, Dispositif, edited by Stefano Baschiera and Miriam De Rosa Edinburgh: Edinburgh University Press, 2020, pp. 256
Creators: name: Formenti, Cristina
Publisher: name: Cinéma & Cie. Film and Media Studies Journal
Year: 2021

description: Cinéma & Cie. Film and Media Studies Journal, Vol. 21 No. 36/37 (2021): Glocal Detectives. Cultural Diversity In European Tv Crime Dramas
Intrinsic photometric characterisation of stellar oscillations and granulation. Solar reference values and CoRoT response functions
Creators: name: Michel, E.
name: Samadi, R.
name: Baudin, F.
name: Barban, C.
name: Appourchaux, T.
name: Auvergne, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Measuring amplitudes of solar-like oscillations and the granulation power spectral density constitute two promising sources of information to improve our understanding and description of the convection in outer layers of stars. However, different instruments, using different techniques and different bandpasses, give measurements that cannot be directly compared to each other or to theoretical values. Aims: In this work, we define simple response functions to derive intrinsic oscillation amplitudes and granulation power densities, from photometry measurements obtained with a specific instrument on a specific star. Methods: We test this method on different photometry data sets obtained on the Sun with two different instruments in three different bandpasses. Results: We show that the results are in good agreement and we establish reference intrinsic values for the Sun with photometry. We also compute the response functions of the CoRoT instrument for a range of parameters representative of the Main Sequence solar-like pulsators to be observed with CoRoT. We show that these response functions can be conveniently described by simple analytic functions of the effective temperature of the target star.
description: 6 pages, 7 figures. Updated title and abstract
title: Έλεγχος και προσομοίωση τετρακόπτερου (μη επανδρωμένου)
title: Quadcopter control and simulation (unmanned)
titleType: AlternativeTitle
Creators: name: Σκορδάς, Ευάγγελος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Quadcopter
PID controller
Cohen-Coon method
Τετρακόπτερο
MATLAB
Simulink
Μη επανδρωμένα ιπτάμενα οχήματα
Ziegler–Nichols method
Modified method
Tyreus-Luyben method
Astrom-Hagglund method

description: Στην παρούσα διπλωματική εργασία, αναλύεται ο τρόπος ελέγχου ενός μη επανδρωμένου τετρακόπτερου με τη χρήση PID ελεγκτή. Παρουσιάζεται η χρήση τέτοιων ρομποτικών συστημάτων σήμερα, ορισμοί καθώς και τα διάφορα πλεονεκτήμα και μειονετκήματα αυτών. Γίνεται αναλυτική περιγραφή της κινηματικής και δυναμικής συμπεριφοράς του συστήματος, με στόχο την εξαγωγή ενός γραμμικού μαθηματικού μοντέλου όπου, θα εφαρμοστεί σε αυτό ο ελεγκτής PID. Επιπλέον, παρουσιάζονται ορισμένες μέθοδοι ρύθμισης του PID ελεγκτή. Τέλος, η απεικόνιση του μοντέλου γίνεται στο περιβάλλον εξομοίωσης MATLAB-SIMULINK έχοντας ως σκοπό την σταθερή και ομαλή κίνηση του τετρακόπτερου.
Dijet Searches for Supersymmetry at the LHC
Creators: name: Randall, Lisa
name: Tucker-Smith, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present several strategies for searching for supersymmetry in dijet channels that do not explicitly invoke missing energy. Preliminary investigations suggest that signal-to-background ratios of at least 4--5 should be achievable at the LHC, with discovery possible for squarks as heavy as ~ 1.7 TeV.
JigSaw: Boosting Fidelity of NISQ Programs via Measurement Subsetting
Creators: name: Das, Poulami
name: Tannu, Swamit
name: Qureshi, Moinuddin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Near-term quantum computers contain noisy devices, which makes it difficult to infer the correct answer even if a program is run for thousands of trials. On current machines, qubit measurements tend to be the most error-prone operations (with an average error-rate of 4%) and often limit the size of quantum programs that can be run reliably on these systems. As quantum programs create and manipulate correlated states, all the program qubits are measured in each trial and thus, the severity of measurement errors increases with the program size. The fidelity of quantum programs can be improved by reducing the number of measurement operations. We present JigSaw, a framework that reduces the impact of measurement errors by running a program in two modes. First, running the entire program and measuring all the qubits for half of the trials to produce a global (albeit noisy) histogram. Second, running additional copies of the program and measuring only a subset of qubits in each copy, for the remaining trials, to produce localized (higher fidelity) histograms over the measured qubits. JigSaw then employs a Bayesian post-processing step, whereby the histograms produced by the subset measurements are used to update the global histogram. Our evaluations using three different IBM quantum computers with 27 and 65 qubits show that JigSaw improves the success rate on average by 3.6x and up-to 8.4x. Our analysis shows that the storage and time complexity of JigSaw scales linearly with the number of qubits and trials, making JigSaw applicable to programs with hundreds of qubits.
description: 13 pages, 14 figures, 7 tables
Pi-phases in balanced fermionic superfluids on spin-dependent optical lattices
Creators: name: Zapata, I.
name: Wunsch, B.
name: Zinner, N. T.
name: Demler, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study a balanced two-component system of ultracold fermions in one dimension with attractive interactions and subject to a spin-dependent optical lattice potential of opposite sign for the two components. We find states with different types of modulated pairing order parameters which are conceptually similar to pi-phases discussed for superconductor-ferromagnet heterostructures. Increasing the lattice depth induces sharp transitions between states of different parity. While the origin of the order parameter oscillations is similar to the FFLO phase for paired states with spin imbalance, the current system is intrinsically stable to phase separation. We discuss experimental requirements for creating and probing these novel phases.
description: 4.3 pages, 4 figures, published version
Discrete Fourier analysis on fundamental domain of $A_d$ lattice and on simplex in $d$-variables
Creators: name: Li, Huiyuan
name: Xu, Yuan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 42A15, 42B05, 65D05, 65D32

description: A discrete Fourier analysis on the fundamental domain $Ω_d$ of the $d$-dimensional lattice of type $A_d$ is studied, where $Ω_2$ is the regular hexagon and $Ω_3$ is the rhombic dodecahedron, and analogous results on $d$-dimensional simplex are derived by considering invariant and anti-invariant elements. Our main results include Fourier analysis in trigonometric functions, interpolation and cubature formulas on these domains. In particular, a trigonometric Lagrange interpolation on the simplex is shown to satisfy an explicit compact formula and the Lebesgue constant of the interpolation is shown to be in the order of $(\log n)^d$. The basic trigonometric functions on the simplex can be identified with Chebyshev polynomials in several variables already appeared in literature. We study common zeros of these polynomials and show that they are nodes for a family of Gaussian cubature formulas, which provides only the second known example of such formulas.
description: 39 pages, 10 figures
A New Multi Objective Mathematical Model for Relief Distribution Location at Natural Disaster Response Phase
Creators: name: Sadeghi, Mohamad Ebrahim
name: Khodabakhsh, Morteza
name: Ganjipoor, Mahmood Reza
name: Kazemipoor, Hamed
name: Nozari, Hamed
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Every year, natural disasters such as earthquake, flood, hurricane and etc. impose immense financial and humane losses on governments owing to their unpredictable character and arise of emergency situations and consequently the reduction of the abilities due to serious damages to infrastructures, increases demand for logistic services and supplies. First, in this study the necessity of paying attention to locating procedures in emergency situations is pointed out and an outline for the studied case of disaster relief supply chain was discussed and the problem was validated at small scale. On the other hand, to solve this kind of problems involving three objective functions and complicated time calculation, meta-heuristic methods which yield almost optimum solutions in less time are applied. The EC method and NSGA II algorithm are among the evolutionary multi-objective optimization algorithms applied in this case. In this study the aforementioned algorithm is used for solving problems at large scale.
Irregular connections and Kac-Moody root systems
Creators: name: Boalch, Philip
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Some moduli spaces of irregular connections on the trivial bundle over the Riemann sphere will be identified with Nakajima quiver varieties. In particular this enables us to associate a Kac-Moody root system to such connections (yielding many isomorphisms between such moduli spaces, via the reflection functors for the corresponding Weyl group). The possibility of 'reading' a quiver in different ways also yields numerous isomorphisms between such moduli spaces, often between spaces of connections on different rank bundles and with different polar divisors. Finally some results of Crawley-Boevey on the existence of stable connections will be extended to this more general context.