cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
SIMVI disentangles intrinsic and spatial-induced cellular states in spatial omics data
Creators: name: Dong, Mingze
name: Su, David
name: Kluger, Harriet
name: Fan, Rong
name: Kluger, Yuval
Publisher: name: Zenodo
Year: 2024

description: Dataset for the publication "SIMVI disentangles intrinsic and spatial-induced cellular states in spatial omics data". The preprocessed Scanpy object of the melanoma data is provided as "Melanoma_5612.h5ad". The SIMVI package is available at https://github.com/KlugerLab/SIMVI and can be installed using PyPI. Scripts used to generate results in the manuscript are also provided in this repository.
description: Spatial omics technologies enable analysis of gene expression and interaction dynamics in relation to tissue structure and function. However, existing computational methods may not properly distinguish cellular intrinsic variability and intercellular interactions, and may thus fail to reliably capture spatial regulations. Here, we present Spatial Interaction Modeling using Variational Inference (SIMVI), an annotation-free deep learning framework that disentangles cell intrinsic and spatial-induced latent variables in spatial omics data with rigorous theoretical support. By this disentanglement, SIMVI enables estimation of spatial effects at a single-cell resolution, and empowers various downstream analyses. We demonstrate the superior performance of SIMVI across datasets from diverse platforms and tissues. SIMVI illuminates the cyclical spatial dynamics of germinal center B cells in human tonsil. Applying SIMVI to multiome melanoma data reveals potential tumor epigenetic reprogramming states. On our newly-collected cohort-level CosMx melanoma data, SIMVI uncovers space-and-outcome-dependent macrophage states and cellular communication machinery in tumor microenvironments.
Persistence Exponents and Scaling In Two Dimensional XY model and A Nematic Model
Creators: name: Dutta, Subhrajit
name: Roy, Soumen Kumar
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The persistence exponents associated with the T=0 quenching dynamics of the two dimensional XY model and a two dimensional uniaxial spin nematic model have been evaluated using a numerical simulation. The site persistence or the probability that the sign of a local spin component does not change starting from initial time t=0 up to certain time t, is found to decay as L(t)^-theta, (L(t) is the linear domain length scale), with theta =0.305 for the two dimensional XY model and 0.199 for the two dimensional uniaxial spin nematic model. We have also investigated the scaling (at the late time of phase ordering) associated with the correlated persistent sites in both models. The persistence correlation length was found to grow in same way as L(t).
description: 8 figures, only three new references are included in this version. (ref. 18 and ref. 32)
Conductance of Disordered Wires with Symplectic Symmetry: Comparison between Odd- and Even-Channel Cases
Creators: name: Takane, Yositake
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The conductance of disordered wires with symplectic symmetry is studied by numerical simulations on the basis of a tight-binding model on a square lattice consisting of M lattice sites in the transverse direction. If the potential range of scatterers is much larger than the lattice constant, the number N of conducting channels becomes odd (even) when M is odd (even). The average dimensionless conductance g is calculated as a function of system length L. It is shown that when N is odd, the conductance behaves as g --> 1 with increasing L. This indicates the absence of Anderson localization. In the even-channel case, the ordinary localization behavior arises and g decays exponentially with increasing L. It is also shown that the decay of g is much faster in the odd-channel case than in the even-channel case. These numerical results are in qualitative agreement with existing analytic theories.
description: 4 pages
RaSE: Random Subspace Ensemble Classification
Creators: name: Tian, Ye
name: Feng, Yang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We propose a flexible ensemble classification framework, Random Subspace Ensemble (RaSE), for sparse classification. In the RaSE algorithm, we aggregate many weak learners, where each weak learner is a base classifier trained in a subspace optimally selected from a collection of random subspaces. To conduct subspace selection, we propose a new criterion, ratio information criterion (RIC), based on weighted Kullback-Leibler divergence. The theoretical analysis includes the risk and Monte-Carlo variance of the RaSE classifier, establishing the screening consistency and weak consistency of RIC, and providing an upper bound for the misclassification rate of the RaSE classifier. In addition, we show that in a high-dimensional framework, the number of random subspaces needs to be very large to guarantee that a subspace covering signals is selected. Therefore, we propose an iterative version of the RaSE algorithm and prove that under some specific conditions, a smaller number of generated random subspaces are needed to find a desirable subspace through iteration. An array of simulations under various models and real-data applications demonstrate the effectiveness and robustness of the RaSE classifier and its iterative version in terms of low misclassification rate and accurate feature ranking. The RaSE algorithm is implemented in the R package RaSEn on CRAN.
description: 93 pages, 13 figures
Packing Fractions and Maximum Angles of Stability of Granular Materials
Creators: name: Olson, J.
name: Priester, M.
name: Luo, J.
name: Chopra, S.
name: Zieve, R. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In two-dimensional rotating drum experiments, we find two separate influences of the packing fraction of a granular heap on its stability. For a fixed grain shape, the stability increases with packing fraction. However, in determining the relative stability of different grain shapes, those with the lowest average packing fractions tend to form the most stable heaps. We also show that only the configuration close to the surface of the pile figures prominently.
description: 4 pages, 4 figures
Agricultural Productivity Convergence: Myth or Reality?
Creators: name: Poudel, Biswo N.
name: Paudel, Krishna P.
name: Zilberman, David
name: Poudel, Biswo N.
name: Paudel, Krishna P.
name: Zilberman, David
Publisher: name: Unknown
Year: 2011
Subjects: subject: Production Economics
subject: Productivity Analysis
subject: agricultural total factor productivity
subject: convergence
subject: human capital
subject: U.S. states

description: We tested agricultural productivity convergence in the United States using the state level total factor productivity data and utilizing new estimation and cluster identification methods to identify convergence in the data. The empirical investigation did not indicate any evidence of agricultural total factor productivity (TFP) convergence at the state level. However, we found the evidence of TFP convergence at the regional level for some regions/clusters.
The provision of AIDS information to young people in libraries: a study of two shire counties
Creators: name: Penn, Elizabeth A.
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: The provision of AIDS information to young people in libraries: a study of two shire counties
Modelling transport and mixing processes in rotating stars in 1D and multi-D stellar evolution codes
Creators: name: Mathis, Stéphane
Publisher: name: Zenodo
Year: 2024

description: Over the past two decades, asteroseismology has revolutionised our knowledge of the structure, evolution and dynamics of stars. In particular, it has shown that stellar interiors are the seat of strong angular momentum transport, while spectroscopy continuously reveals signatures of complex internal mixing. In addition, all stars go through a period of rapid rotation during their lives. To bring stellar modelling to the level of realism required to interpret observations and provide key stellar properties needed by all branches of modern astrophysics, it is imperative to develop a new generation of 2 to 3-D stellar structure and evolution models, while continuing to improve existing 1-D models. To achieve such an ambitious goal, one of the key requirements is to drastically improve the modelling of multi-scale macroscopic transport and mixing mechanisms in order to assess their effects on the long-term evolution of stars. In this talk, I will report on the ongoing coherent effort to improve the modelling of all hydrodynamical processes, such as waves and shear instabilities, taking into account the full Coriolis acceleration, and show how we are preparing their direct implementation in 2D models of rapidly rotating stars, while providing relevant adapted prescriptions for 1D stellar models. This should allow us to gradually build up a realistic model of the long-term internal dynamics of rotating stars.
Highlights from Five Years at the B Factories
Creators: name: Hou, Wei-Shu
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The highlights and conflicts at the B Factories are briefly reviewed. $CP$ violation was established in 2001 in $B^0 \to J/ψK_S$ and related modes, which has now become a precision measurement of CP violation in $B^0$-$\bar B^0$ mixing. However, the situation for the $B^0 \to π^+π^-$ and charmless $b\to s$ modes, which probe also CP violation in the {\it decay} amplitude, are not quite settled yet. They could be hinting at presence of both strong (CP conserving) and new physics (CP violating) phases. We critically assess the developments and discuss some related discrepancies and highlights, such as observation of direct CP violation, and make a projection towards the next few years.
description: 16 pages, 5 figures, to appear as Brief Review in Mod. Phys. Lett. A
A Metabolite Specific 3D Stack-of-Spiral bSSFP Sequence for Improved Lactate Imaging in Hyperpolarized [1-$^{13}$C]Pyruvate Studies on a 3T Clinical Scanner
Creators: name: Tang, Shuyu
name: Bok, Robert
name: Qin, Hecong
name: Reed, Galen
name: VanCriekinge, Mark
name: Santos, Romelyn Delos
name: Overall, William
name: Santos, Juan
name: Gordon, Jeremy
name: Wang, Zhen Jane
name: Vigneron, Daniel B.
name: Larson, Peder E. Z.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Purpose: The balanced steady-state free precession sequence has been previously explored to improve the efficient use of non-recoverable hyperpolarized $^{13}$C magnetization, but suffers from poor spectral selectivity and long acquisition time. The purpose of this study was to develop a novel metabolite-specific 3D bSSFP ("MS-3DSSFP") sequence with stack-of-spiral readouts for improved lactate imaging in hyperpolarized [1-$^{13}$C]pyruvate studies on a clinical 3T scanner. Methods: Simulations were performed to evaluate the spectral response of the MS-3DSSFP sequence. Thermal $^{13}$C phantom experiments were performed to validate the MS-3DSSFP sequence. In vivo hyperpolarized [1-$^{13}$C]pyruvate studies were performed to compare the MS-3DSSFP sequence with metabolite specific gradient echo ("MS-GRE") sequences for lactate imaging. Results: Simulations, phantom and in vivo studies demonstrate that the MS-3DSSFP sequence achieved spectrally selective excitation on lactate while minimally perturbing other metabolites. Compared with MS-GRE sequences, the MS-3DSSFP sequence showed approximately a 2.5-fold SNR improvement for lactate imaging in rat kidneys, prostate tumors in a mouse model and human kidneys. Conclusions: Improved lactate imaging using the MS-3DSSFP sequence in hyperpolarized [1-$^{13}$C]pyruvate studies was demonstrated in animals and humans. The MS-3DSSFP sequence could be applied for other clinical applications such as in the brain or adapted for imaging other metabolites such as pyruvate and bicarbonate.
Additional file 1 of Footwear and insole design features that reduce neuropathic plantar forefoot ulcer risk in people with diabetes: a systematic literature review
Creators: name: Ahmed, Sayed
name: Barwick, Alex
name: Butterworth, Paul
name: Nancarrow, Susan
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 60506 Virology

description: Additional file 1. Search term and strategy.
Principal Component Analysis of Crop Yield Response to Climate Change
Creators: name: Cai, Ruohong
name: Bergstrom, John C.
name: Mullen, Jeffrey D.
name: Wetzstein, Michael E.
name: Shurley, W. Donald
name: Cai, Ruohong
name: Bergstrom, John C.
name: Mullen, Jeffrey D.
name: Wetzstein, Michael E.
name: Shurley, W. Donald
Publisher: name: Unknown
Year: 2011
Subjects: subject: Crop Production/Industries
subject: Principal component regression
subject: Crop yield response
subject: Climate change.

description: The objective of this study is to compare the effects of climate change on crop yields across different regions. A Principal Component Regression (PCR) model is developed to estimate the historical relationships between weather and crop yields for corn, soybeans, cotton, and peanuts for several northern and southern U.S. states. Climate change projection data from three climate models are applied to the estimated PCR model to forecast crop yield response. Instead of directly using weather variables as predictor variables, the PCR model uses weather indices transformed from original weather variables by the Principal Component Analysis (PCA) approach. A climate change impact index (CCII) is developed to compare climate change effects across different regions. The key contribution of our study is in identifying a different climate change effects in crop yields in different U.S. states. Specifically, our results indicate that future warmer weather will have a negative impact for southern U.S. counties, while it has insignificant impact for northern U.S. counties in the next four decades.
Investigating Interactions of Biomembranes and Alcohols: A Multiscale Approach
Creators: name: Dickey, Allison N.
name: Faller, Roland
Publisher: name: arXiv
Year: 2004
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We study the interaction of lipid bilayers with short chain alcohols using molecular dynamics on different length scales. We use detailed atomistic modeling and modeling on the length scale where an alcohol is just an amphiphilic dimer. Our strategy is to calibrate a coarse--grained model against the detailed model at selected state points at low alcohol concentration and then perform a wider range of simulations using the coarse--grained model. We get semiquantitative agreement with experiment for the major observables such as order parameter and area per molecule. We find a linear increase of area per molecule with alcohol concentration. The alcohol molecules in both system descriptions are in close contact with the glycerol backbone. Butanol molecules can enter the bilayer to some extent in contrast to the behavior of shorter alcohols. At very high alcohol concentrations we find clearly increased interdigitation between leaflets.
description: 14 pages, 6 figures
The role of the animal ethics committee in achieving humane animal experimentation
Creators: name: Schuppli, Catherine Anne
Publisher: name: University of British Columbia
Year: 2009

description: Institutional Animal Ethics Committees (AECs) are the principal means of ensuring the ethical use of animals in research in many countries, yet we understand very little about how they function and how effective they are in implementing policy and achieving their stated aims. To answer these questions, an ethnographic study involving participant observation and in-depth interviews with 28 members of four university AECs in western Canada was carried out. The major focus of protocol review by committee members was reducing harm to animals, with limited focus on the ethical justification of research despite this being stressed in policy as a goal of AECs. In part, this may be due to confusion over the relation between AEC review and scientific peer review by granting agencies, with some members believing that ethical justification is decided by scientific peer review. Members were also unclear on the distinction between the different elements that go into decisions about ethical justification. Use of costbenefit assessment, although prescribed by policy, did not cover the various other decisionmaking approaches that members described using (e.g. moral intuition). Comments by members identified several factors that could hinder application of the Three Rs (Replacement, Reduction, Refinement); these include an incomplete understanding of the concepts, different interpretations of harm, and different beliefs about the moral significance of pain and suffering. Moreover, some ethical issues do not lend themselves to the utilitarian thinking underlying the Three Rs. Independence of the AEC from the institution (as required by policy) may not be realized because of the predominance of institutional scientists on AECs, recruitment of affiliated community members, and the potentially intimidating atmosphere for community members. Also, policy is unclear about the role of the community member. AEC effectiveness could be improved by clarifying the role of the community member, the relation between AEC and scientific peer review, and the elements of cost-benefit assessments, by expanding policy to acknowledge the various issues and approaches used in decision-making, identifying standards for assessing AEC performance, and expanding the Three Rs to respond to the range of views and values that enter into decisions by AEC members.
Additional file 2 of Footwear and insole design features that reduce neuropathic plantar forefoot ulcer risk in people with diabetes: a systematic literature review
Creators: name: Ahmed, Sayed
name: Barwick, Alex
name: Butterworth, Paul
name: Nancarrow, Susan
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 60506 Virology

description: Additional file 2. Quality assessment of the included articles.
Homogeneous Hamiltonian operators and the theory of coverings
Creators: name: Vergallo, Pierandrea
name: Vitolo, Raffaele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A new method (by Kersten, Krasil'shchik and Verbovetsky), based on the theory of differential coverings, allows to relate a system of PDEs with a differential operator in such a way that the operator maps symmetries/conserved quantities into symmetries/conserved quantities of the system of PDEs. When applied to a quasilinear first-order system of PDEs and a Dubrovin-Novikov homogeneous Hamiltonian operator the method yields conditions on the operator and the system that have interesting differential and projective geometric interpretations.
description: Last version (few misprints corrected)
Search for lepton flavor violating decays tau- -> l- pi0, l- eta, l- eta'
Creators: name: Enari, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have searched for lepton flavor violating semileptonic tau decays using a data sample of 153.8/fb accumulated with the Belle detector at the KEKB e+e- collider. For the six decay modes studied, the observed yield is compatible with the estimated background and the following upper limits are set at the 90% confidence level: B(tau- -> e- eta) < 2.3 x 10^-7, B(tau- -> mu- eta) < 1.5 x 10^-7, B(tau- -> e- pi0) < 1.9 x 10^-7, B(tau- -> mu- pi0) < 4.1 x 10^-7, B(tau- -> e- eta') < 10 x 10^-7, and B(tau- -> mu- eta') < 4.7 x 10^-7. These results are 10 to 64 times more restrictive than previous limits.
description: 14 pages, 13 figures, RevTex4
Additional file 1 of Dental disorders in sows from Swedish commercial herds
Creators: name: Malmsten, Anna
name: Lundeheim, Nils
name: Dalin, Anne-Marie
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: Hematology

description: Additional file 1: Dental examination chart. Description: Incisors (I), canines (C), premolars (P) and molars (M) are numbered in accordance with their appearance in primitive eutherian dentition (lower-case letter indicates deciduous teeth).
A Dynamic Optimal Crop Rotation Model in Acreage Response
Creators: name: Cai, Ruohong
name: Bergstrom, John C.
name: Mullen, Jeffrey D.
name: Wetzstein, Michael E.
name: Cai, Ruohong
name: Bergstrom, John C.
name: Mullen, Jeffrey D.
name: Wetzstein, Michael E.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Crop Production/Industries
subject: Research Methods/ Statistical Methods
subject: Crop rotation
subject: Acreage response
subject: Bellman equation

description: This paper presents a dynamic crop rotation model that shows how crop yield and price volatility could impact crop mix and acreage response under crop rotation considerations. Specifically, a discrete Markov decision model is utilized to optimize producers’ crop rotation decision within a finite horizon. By maximizing net present value of expected current and future profits, a modified Bellman equation helps develop optimum planting decisions. This model is capable of simulating crop rotations with different lengths and structures. Specifically, the corn-soybeans rotations were simulated using the crop rotation model.
Additional file 2 of Dental disorders in sows from Swedish commercial herds
Creators: name: Malmsten, Anna
name: Lundeheim, Nils
name: Dalin, Anne-Marie
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: Hematology

description: Additional file 2: Table S1. Indices used to evaluate dental health in Swedish commercial sows [1]
Preferential evaporation in atom probe tomography: an analytical approach
Creators: name: Hatzoglou, Constantinos
name: Rouland, Solène
name: Radiguet, Bertrand
name: Etienne, Auriane
name: da Costa, Gérald
name: Sauvage, Xavier
name: Pareige, Philippe
name: Vurpillot, François
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Atom probe tomography (APT) analysis conditions play a major role in the composition measurement accuracy. Preferential evaporation, which significantly biases apparent composition, more than other well-known phenomena in APT, is strongly connected to those analysis conditions. One way to optimize them, in order to have the most accurate measurement, is therefore to be able to predict and then to estimate their influence on the apparent composition. An analytical model is proposed to quantify the preferential evaporation. This model is applied to three different alloys: NiCu, FeCrNi and FeCu. The model explains not only the analysis temperature dependence, as in already existing model, but also the dependence to the pulse fraction and the pulse frequency. Moreover, the model can also provide energetic constant directly linked to energy barrier, required to field evaporate atom from the sample surface. 2
MPEC 2024-C112 : 2024 CB2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 CB2

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Image reconstruction technique and optical monitoring of the QSO2237+0305 from Maidanak Observatory in 2002 -- 2003
Creators: name: Koptelova, E. A.
name: Shimanovskaya, E. V.
name: Artamonov, B. P.
name: Sazhin, M. V.
name: Yagola, A. G.
name: Bruevich, V. V.
name: Burkhonov, O. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have observed the gravitational lens system Q2237+0305 from the Maidanak Observatory over the period from August 2002 to November 2003. Here we report the results of our observations. We implemented a two-stage technique that has been developed specifically for the purpose of gravitational lens image reconstruction. The technique is based on the Tikhonov regularization approach and allows one to obtain astrometric and photometric characteristics of the gravitational lens system. Light curves with 78 data points for the four quasar components are obtained. Slow brightness variations over the observational period are found in all components. Images A, C, D have a tendency to decrease in brightness. Image B does not vary more than 0.05mag. The observations did not reveal evidence for large variations in brightness of the components due to microlensing effects. To provide an overall picture of the photometry behaviour, our data are combined with the Maidanak observations published for 1995 -- 2000.
description: 9 pages, 4 figures, accepted by MNRAS
On Hermitian varieties in $\mathrm{PG}(6,q^2)$
Creators: name: Aguglia, Angela
name: Giuzzi, Luca
name: Homma, Masaaki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 51E21, 51E15, 51E20

description: In this paper we characterize the non-singular Hermitian variety ${\mathcal H}(6,q^2)$ of $\mathrm{PG}(6, q^2)$, $q\neq2$ among the irreducible hypersurfaces of degree $q+1$ in $\mathrm{PG}(6, q^2)$ not containing solids by the number of its points and the existence of a solid $S$ meeting it in $q^4+q^2+1$ points.
description: 13 pages/revised version
Electric field induced charge injection or exhaustion in organic thin film transistor
Creators: name: Kiguchi, Manabu
name: Nakayama, Manabu
name: Shimada, Toshihiro
name: Saiki, Koichiro
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The conductivity of organic semiconductors is measured {\it in-situ} and continuously with a bottom contact configuration, as a function of film thickness at various gate voltages. The depletion layer thickness can be directly determined as a shift of the threshold thickness at which electric current began to flow. The {\it in-situ} and continuous measurement can also determine qualitatively the accumulation layer thickness together with the distribution function of injected carriers. The accumulation layer thickness is a few mono layers, and it does not depend on gate voltages, rather depends on the chemical species.
description: 4 figures, to be published in Phys. Rev. B
AKADEMIK MUSTAQILLIK ASOSIDA OLIY TA'LIM MUASSASALARI FAOLIYATINI TAKOMILLASHTIRISH
Creators: name: Karimova, Mohinur
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada Akademik mustaqillik asosida oliy ta'lim muassasalari faoliyatini takomillashtirish, bu yo'lda olib borilayotgan amaliy ishlar, yangiliklar, o'zgarishlar haqida, kelajakda bu harakatlar oqibatida bo'ladigan o'zgarishlar haqida so'z borgan.
Quantum phase transition in a transverse Ising chain with regularly varying parameters
Creators: name: Derzhko, O.
name: Richter, J.
name: Krokhmalskii, T.
name: Zaburannyi, O.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using rigorous analytical analysis and exact numerical data for the spin-1/2 transverse Ising chain we discuss the effects of regular alternation of the Hamiltonian parameters on the quantum phase transition inherent in the model.
description: 5 pages, 1 figure
Exponential sums and total Weil representations of finite symplectic and unitary groups
Creators: name: Katz, Nicholas M.
name: Tiep, Pham Huu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 11T23, 20C15, 20D06, 20C33, 20G40

description: We construct explicit local systems on the affine line in characteristic $p>2$, whose geometric monodromy groups are the finite symplectic groups $Sp_{2n}(q)$ for all $n \ge 2$, and others whose geometric monodromy groups are the special unitary groups $SU_n(q)$ for all odd $n \ge 3$, and $q$ any power of $p$, in their total Weil representations. One principal merit of these local systems is that their associated trace functions are one-parameter families of exponential sums of a very simple, i.e., easy to remember, form. We also exhibit hypergeometric sheaves on $G_m$, whose geometric monodromy groups are the finite symplectic groups $Sp_{2n}(q)$ for any $n \ge 2$, and others whose geometric monodromy groups are the finite general unitary groups $GU_n(q)$ for any odd $n \geq 3$.
description: 56 pages
On the deformed Bott-Chern cohomology
Creators: name: Xia, Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32G05, 32C35, 32G99

description: Given a compact complex manifold $X$ and a integrable Beltrami differential $ϕ\in A^{0,1}(X, T_{X}^{1,0})$, we introduce a double complex structure on $A^{\bullet,\bullet}(X)$ naturally determined by $ϕ$ and study its Bott-Chern cohomology. In particular, we establish a deformation theory for Bott-Chern cohomology and use it to compute the deformed Bott-Chern cohomology for the Iwasawa manifold and the holomorphically parallelizable Nakamura manifold. The $\partial\bar{\partial}_ϕ$-lemma is studied and we show a compact complex manifold satisfying $\partial\bar{\partial}_ϕ$-lemma is formal.
description: 23 pages
Hole-hole interaction in a strained In$_x$Ga$_{1-x}$As two dimensional system
Creators: name: Minkov, G. M.
name: Sherstobitov, A. A.
name: Germanenko, A. V.
name: Rut, O. E.
name: Larionova, V. A.
name: Zvonkov, B. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The interaction correction to the conductivity of 2D hole gas in strained GaAs/In$_x$Ga$_{1-x}$As/GaAs quantum well structures was studied. It is shown that the Zeeman splitting, spin relaxation and ballistic contribution should be taking into account for reliable determination of the Fermi-liquid constant $F_0^σ$. The proper consideration of these effects allows us to describe both th temperature and magnetic field dependences of the conductivity and find the value of $F_0^σ$.
description: 7 pages, 6 figures
REAL EXCHANGE RATE DETERMINANTS IN TRANSITION ECONOMIES: Do Macroeconomic Fundamentals and Political Risk Play a Role?
Creators: name: Heboyan, Vahe
name: Gunter, Lewell F.
name: Heboyan, Vahe
name: Gunter, Lewell F.
Publisher: name: Unknown
Year: 2011
Subjects: International Relations/Trade
Risk and Uncertainty

description: Replaced with revised version of poster 07/21/11.
Noncommutative homological mirror symmetry of elliptic curves
Creators: name: Lee, Sangwook
Publisher: name: arXiv
Year: 2020
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove an equivalence of two A-infinity functors, via Orlov's Landau-Ginzburg/Calabi-Yau correspondence. One is the Polishchuk-Zaslow's mirror symmetry functor of elliptic curves, and the other is a localized mirror functor from the Fukaya category of the 2-torus to a category of noncommutative matrix factorizations. As a corollary we prove that the noncommutative mirror functor realizes homological mirror symmetry for any translation parameter $t$.
description: 17 pages, 4 figures. To appear in Kyoto J. Math
title: Lab in Virtuo : un Environnement Virtuel Intelligent pour l’histoire et le patrimoine des paysages culturels industriels
title: Lab in Virtuo: An Intelligent Virtual Environment for the History and Heritage of Industrial Cultural Landscapes
Creators: name: Querrec, Ronan
name: Laubé, Sylvain
name: Garlatti, Serge
name: Richard, Nicolas
name: Abiven, Marie-Morgane
name: Rohou, Bruno
Publisher: name: Institut National de Recherches Archéologiques Préventives
publisherIdentifier: https://ror.org/04andmq85
publisherIdentifierScheme: ROR
Year: 2018

description: La réalité virtuelle augmentée permet, au-delà des approches classiques en histoire et patrimoine des paysages industriels, de développer des méthodes et des pratiques de recherches innovantes. Elle améliore, qualitativement et quantitativement, l’explicitation des données et des connaissances, grâce à un environnement 3D virtuel réaliste et une approche favorisant les sciences participatives et collaboratives. L’Environnement Virtuel Intelligent (EVI), développé dans nos travaux, constitue un Laboratoire In Virtuo qui intègre une base de connaissance incrémentale, alimentée par la collecte de connaissances produites dans l’EVI et par la constitution de corpus numériques de référence (sources primaires, sources secondaires, artefacts, etc.). Il s’appuie sur l’alignement de trois méta-modèles : Any-artefact (méta-modèle d’activité humaine en histoire des techniques), Any-artefact-O (ontologie associée et conçue comme une extension du CIDOC-CRM) et MASCARET (méta-modèle d’activité pour la RV développé au CERV).
description: Augmented virtual reality, beyond traditional approaches in the history and heritage of industrial landscapes, enables the development of innovative research methods and practices. It qualitatively and quantitatively enhances the explanation of data and knowledge through a realistic 3D virtual environment and an approach that fosters participatory and collaborative science. The Intelligent Virtual Environment (IVE), developed in our work, forms an In Virtuo Laboratory that integrates an incremental knowledge base, enriched by the collection of knowledge produced within the IVE and by the creation of reference digital corpora (primary sources, secondary sources, artifacts, etc.). It is based on the alignment of three meta-models: Any-artefact (a meta-model of human activity in the history of technology), Any-artefact-O (an associated ontology designed as an extension of the CIDOC-CRM), and MASCARET (an activity meta-model for virtual reality developed at CERV).
Processes, Systems and Tests: Defining Contextual Equivalences
Creators: name: Aubert, Clément
name: Varacca, Daniele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: In this position paper, we would like to offer and defend a new template to study equivalences between programs -- in the particular framework of process algebras for concurrent computation.We believe that our layered model of development will clarify the distinction that is too often left implicit between the tasks and duties of the programmer and of the tester. It will also enlighten pre-existing issues that have been running across process algebras as diverse as the calculus of communicating systems, the $π$-calculus -- also in its distributed version -- or mobile ambients.Our distinction starts by subdividing the notion of process itself in three conceptually separated entities, that we call \emph{Processes}, \emph{Systems} and \emph{Tests}. While the role of what can be observed and the subtleties in the definitions of congruences have been intensively studied, the fact that \emph{not every process can be tested}, and that \emph{the tester should have access to a different set of tools than the programmer} is curiously left out, or at least not often formally discussed.We argue that this blind spot comes from the under-specification of contexts -- environments in which comparisons takes place -- that play multiple distinct roles but supposedly always \enquote{stay the same}.We illustrate our statement with a simple Java example, the \enquote{usual} concurrent languages, but also back it up with $λ$-calculus and existing implementations of concurrent languages as well.
Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules
Creators: name: Yu, Phelan
name: Hutzler, Nicholas R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Precision measurements of Schiff moments in heavy, deformed nuclei are sensitive probes of beyond Standard Model $T,P$-violation in the hadronic sector. While the most sensitive limits on Schiff moments to date are set with diamagnetic atoms, polar polyatomic molecules can offer higher sensitivities with unique experimental advantages. In particular, symmetric top molecular ions possess $K$-doublets of opposite parity with especially small splittings, leading to full polarization at low fields, internal co-magnetometer states useful for rejection of systematic effects, and the ability to perform sensitive searches for $T,P$-violation using a small number of trapped ions containing heavy exotic nuclei. We consider the symmetric top cation $^{225}$RaOCH$_3^+$ as a prototypical and candidate platform for performing sensitive nuclear Schiff measurements and characterize in detail its internal structure using relativistic ab initio methods. The combination of enhancements from a deformed nucleus, large polarizability, and unique molecular structure make this molecule a promising platform to search for fundamental symmetry violation even with a single trapped ion.
Coulomb and Spin blockade of two few-electrons quantum dots in series in the co-tunneling regime
Creators: name: Ciorga, M.
name: Pioro-Ladrière, M.
name: Zawadzki, P.
name: Lapointe, J.
name: Wasilewski, Z.
name: Sachrajda, A. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present Coulomb Blockade measurements of two few-electron quantum dots in series which are configured such that the electrochemical potential of one of the two dots is aligned with spin-selective leads. The charge transfer through the system requires co-tunneling through the second dot which is $not$ in resonance with the leads. The observed amplitude modulation of the resulting current is found to reflect spin blockade events occurring through either of the two dots. We also confirm that charge redistribution events occurring in the off-resonance dot are detected indirectly via changes in the electrochemical potential of the aligned dot.
description: 6 pages, 5 figures, submitted to Phys. Rev. B
Essays in firm dynamics
Creators: name: Petrunia, Robert John
Publisher: name: University of British Columbia
Year: 2009

description: This thesis comprises three essays that analyze financial and non-financial aspects of firm and industry dynamics. The first essay investigates the evolution of a cohort of entrants during their first ten years of life. The study looks at the distributions of sales, assets, employment and debtasset ratio for these firms over time and compares how these distributions change relative to distributions for incumbent firms. Entrants are smaller in terms of employees, assets and sales, but have a higher debt-asset ratio when compared with incumbents. These differences lessen over time because entrants have higher growth rates and smaller entrant firms have higher failure rates than compared to larger entrants. The second essay investigates whether long-term growth of a firm is independent of initial financial structure. I look at a panel of Canadian retail and manufacturing firms born in 1985. The analysis involves a two-part testing process. The first part tests whether firm growth exhibits initial size dependence. The growth process for retail firms exhibits initial size dependence, while the growth process for manufacturing firms does not. The second part looks at whether growth of ten-year old manufacturing firms is independent of initial debt-asset ratio. The result rejects independence with the finding that age ten conditional size of a manufacturing firm has a non-monotonic relationship with initial debt-asset ratio. The final essay examines whether Gibrat's law holds for groups of Canadian firms operating in manufacturing and retail sectors. Gibrat's law holds when firm growth and variability of growth are independent of firm size and firm growth is independent across time. Firm growth and variability of growth depend on size for each set of firms, which leads to violations of Gibrat's law. The source of these two violations is not survival bias, since the violations occur with the inclusion or exclusion of failing firms. A further violation is that negative growth persistence exists. Finally, I look at possible failure because of age effects. I examine a group of new firms with a common age and find the violations continue to occur for this group.
Tropical and Extratropical Cyclone Detection Using Deep Learning
Creators: name: Kumler-Bonfanti, Christina
name: Stewart, Jebb
name: Hall, David
name: Govett, Mark
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Extracting valuable information from large sets of diverse meteorological data is a time-intensive process. Machine learning methods can help improve both speed and accuracy of this process. Specifically, deep learning image segmentation models using the U-Net structure perform faster and can identify areas missed by more restrictive approaches, such as expert hand-labeling and a priori heuristic methods. This paper discusses four different state-of-the-art U-Net models designed for detection of tropical and extratropical cyclone Regions Of Interest (ROI) from two separate input sources: total precipitable water output from the Global Forecasting System (GFS) model and water vapor radiance images from the Geostationary Operational Environmental Satellite (GOES). These models are referred to as IBTrACS-GFS, Heuristic-GFS, IBTrACS-GOES, and Heuristic-GOES. All four U-Nets are fast information extraction tools and perform with a ROI detection accuracy ranging from 80% to 99%. These are additionally evaluated with the Dice and Tversky Intersection over Union (IoU) metrics, having Dice coefficient scores ranging from 0.51 to 0.76 and Tversky coefficients ranging from 0.56 to 0.74. The extratropical cyclone U-Net model performed 3 times faster than the comparable heuristic model used to detect the same ROI. The U-Nets were specifically selected for their capabilities in detecting cyclone ROI beyond the scope of the training labels. These machine learning models identified more ambiguous and active ROI missed by the heuristic model and hand-labeling methods commonly used in generating real-time weather alerts, having a potentially direct impact on public safety.
description: 23 pages, 7 figures, 3 tables
Towards Generating Benchmark Datasets for Worm Infection Studies
Creators: name: Asgari, Sara
name: Sadeghiyan, Babak
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Worm origin identification and propagation path reconstruction are among the essential problems in digital forensics. Until now, several methods have been proposed for this purpose. However, evaluating these methods is a big challenge because there are no suitable datasets containing both normal background traffic and worm traffic to evaluate these methods. In this paper, we investigate different methods of generating such datasets and suggest a technique for this purpose. ReaSE is a tool for the creation of realistic simulation environments. However, it needs some modifications to be suitable for generating the datasets. So we make required modifications to it. Then, we generate several datasets for Slammer, Code Red I, Code Red II and modified versions of these worms in different scenarios using our technique and make them publicly available.