cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Heterotrimeric G-protein Complex Modulates Light Sensitivity in Arabidopsis thaliana Seed Germination
Creators: name: Jones, Alan M.
name: Botto, Javier F.
name: Ibarra, Silvia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Release of dormancy and induction of seed germination are complex traits finely regulated by hormonal signals and environmental cues such as temperature and light. The Red (R):Far-Red (FR) phytochrome photoreceptors mediate light regulation of seed germination. We investigated the possible involvement of heterotrimeric G-protein complex in the phytochrome signaling pathways of Arabidopsis thaliana seed germination. Germination rates of null mutants of the alpha (Gα) and beta (Gβ) subunits of the G-protein (Atgpa1-4 and agb1-2, respectively) and the double mutant (agb1-2/gpa1-4) are lower than the wildtype (WT) under continuous or pulsed light. The Gα and Gβ subunits play a role in seed germination under hourly pulses of R lower than 0.1 μmol m−2 s−1 whereas the Gβ subunit plays a role in higher R fluences. The germination of double mutants of G-protein subunits with phyA-211 and phyB-9 suggests that AtGPA1 seems to act as a positive regulator of phyA and probably phyB signaling pathways, while the role of AGB1 is ambiguous. The imbibition of seeds at 4°C and 35°C alters the R and FR light responsiveness of WT and G-protein mutants to a similar magnitude. Thus, Gα and Gβ subunits of the heterotrimeric G-protein complex modulate light induction of seed germination by phytochromes and are dispensable for the control of dormancy by low and high temperatures prior to irradiation. We discuss the possible indirect role of the G-protein complex on the phytochrome-regulated germination through hormonal signaling pathways.
Quantum mechanics on a circle with a finite number of α-uniformly distributed points
Creators: name: Chung, Won Sang
name: Haouam, Ilyas
name: Hassanabadi, Hassan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, quantum mechanics on a circle with finite number of α-uniformly distributed points is discussed. The angle operator and translation operator are defined. Using discrete angle representation, two types of discrete angular momentum operators and Hermitian Hamiltonian on a circle with d α-distributed discrete angles are constructed. The energy levels are computed for a free particle on a circle where the wave function is defined in the d α-distributed discrete angles.
description: 9 pages
Limit Theorems for Multi-Group Curie-Weiss Models via the Method of Moments
Creators: name: Kirsch, Werner
name: Toth, Gabor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60F05, 82B20

description: We study a multi-group version of the mean-field or Curie-Weiss spin model. For this model, we show how, analogously to the classical (single-group) model, the three temperature regimes are defined. Then we use the method of moments to determine for each regime how the vector of the group magnetisations behaves asymptotically. Some possible applications to social or political sciences are discussed.
Two-bead microrheology: Modeling protocols
Creators: name: Hohenegger, Christel
name: Forest, M. Gregory
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: Microbead rheology maps the fluctuations of beads immersed in soft matter to viscoelastic properties of the surrounding medium. In this paper, we present modeling extensions of the seminal results of Mason & Weitz (1995, Phys. Rev. Lett. 74) for a single bead and of Crocker et al. (2000, Phys. Rev. Lett. 85) and Levine & Lubensky (2000, Phys. Rev. Lett. 85) for two beads. We formulate the linear response analysis for two beads so that the model equations retain: the local diffusive properties of each bead (through the memory kernel of the shell or depletion zone surrounding each bead), and the nonlocal dynamic moduli of the medium separating the beads (through the memory kernel that transmits fluctuations of one bead to the other). We then derive a 3×3 invertible system of equations relating: an isolated bead’s auto-correlations, the auto- and cross-correlations of two coupled beads; and, the shell radius surrounding each bead, the memory kernels of the shell and of the medium between the two beads.
Clues on the Missing Sources of Reionization from Self-consistent Modeling of Milky Way and Dwarf Galaxy Globular Clusters
Creators: name: Katz, Harley
name: Ricotti, Massimo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Globular clusters are unique tracers of ancient star formation. We determine the formation efficiencies of globular clusters across cosmic time by modeling the formation and dynamical evolution of the globular cluster population of a Milky Way type galaxy in hierarchical cosmology, using the merger tree from the Via Lactea II simulation. All of the models are constrained to reproduce the observed specific frequency and initial mass function of globular clusters in isolated dwarfs. Globular cluster orbits are then computed in a time varying gravitational potential after they are either accreted from a satellite halo or formed in situ, within the Milky Way halo. We find that the Galactocentric distances and metallicity distribution of globular clusters are very sensitive to the formation efficiencies of globular clusters as a function of redshift and halo mass. Our most accurate models reveal two distinct peaks in the globular cluster formation efficiency at z~2 and z~7-12 and prefer a formation efficiency that is mildly increasing with decreasing halo mass, the opposite of what expected for feedback-regulated star formation. This model accurately reproduces the positions, velocities, mass function, metallicity distribution, and age distribution of globular clusters in the Milky Way and predicts that ~ 40% formed in situ, within the Milky Way halo, while the other ~ 60% were accreted from about 20 satellite dwarf galaxies with Vc > 30 km/s, and about 29% or all globular clusters formed at redshifts z > 7. These results further strengthen the notion that globular cluster formation was an important mode of star formation in high-redshift galaxies and likely played a significant role in the reionization of the intergalactic medium
description: 22 pages, 17 figures, submitted to MNRAS, comments welcome
Conformational change path between closed and open forms of C2 domain of coagulation factor V on a two-dimensional free-energy surface
Creators: name: Pedersen, Lee G.
name: Lee, Chang Jun
name: Wu, Sangwook
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: We test a hypothesis that the closed form of the C2 domain of coagulation factor V is more stable than the open form in an aqueous environment using a two-dimensional free-energy calculation with a simple dielectric solvent model. Our result shows that while the free-energy difference between two forms is small, favoring the closed form, a two-dimensional free-energy surface (FES) reveals that a transition state (1.53 kcal/mol) exists between the two conformations. By mapping the one-dimensional order parameter ΔQ onto the two-dimensional FES, we search the conformational change path with the highest Boltzmann weighting factor between the closed and open form of the factor V C2 domain. The predicted transition path from the closed to open form is not that of simple side chain movements, but instead concerted movements of several loops. We also present a one-dimensional free-energy profile using a collective order parameter, which in a coarse manner locates the energy barriers found on the two-dimensional FES.
Imaging three-dimensional rotational diffusion of plasmon resonant gold nanorods using polarization-sensitive optical coherence tomography
Creators: name: Kozek, Krystian A.
name: Oldenburg, Amy L.
name: Tracy, Joseph B.
name: Chhetri, Raghav K.
name: Johnston-Peck, Aaron C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: We demonstrate depth-resolved viscosity measurements within a single object using polarized optical scattering from ensembles of freely tumbling plasmon resonant gold nanorods (GNRs) monitored with polarization-sensitive optical coherence tomography. The rotational diffusion coefficient of the GNRs is shown to correlate with viscosity in molecular fluids according to the Stokes-Einstein relation. The plasmon resonant and highly anisotropic properties of GNRs are favorable for microrheological studies of nanoscale properties.
Eine neue Quelle zu drei Kantatentexten Johann Sebastian Bachs
Creators: name: Krausse, Helmut K.
Publisher: name: Bach-Jahrbuch
Year: 2018

description: Die Universitätsbibliothek Göttingen besitzt einen gedruckten Kantatenzyklus für das Kirchenjahr, der von einem Magister Knauer aus Schleiz für Gottfried Heinrich Stölzel geschrieben wurde. Bachs 1723 komponierte Kantaten BWV 64, 69a und 77 basieren auf den gleichen Texten von Knauer; sie zeigen jedoch textliche Veränderungen und Schnitte, deren Ursprung bisher noch nicht feststeht. (Übertragung des englischen Resümees am Ende des Bandes)
description: Bach-Jahrbuch, Bd. 67 (1981)
Ballast Degradation and Measurement of Ballast Fouling
Creators: name: Ionescu, Daniela
Publisher: name: La Trobe
Year: 2023

description: Open Access. The published version of this work has been reproduced here in accordance with the author's self archiving and copyright policies.

['School of Business and Technology', 'International Conference on Railway Engineering (7th : 2004 : Commonwealth Institute, London, U.K)']
The use of Slater-type spinor orbitals in algebraic solution of two-center Dirac equation
Creators: name: Bagci, A.
name: Hoggan, P. E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The use of Slater-type spinor orbitals in algebraic solution of the Dirac equation is investigated. The one- and two-center integrals constitute the matrix elements arising in generalized eigenvalue equation for one-electron atoms and molecules are evaluated over Slater-type spinor orbitals via ellipsoidal coordinates. These integrals are calculated through numerical global-adaptive method with Gauss-Kronrod numerical integration extension. The calculations are performed for electronic structure of ground and excited states of one-electron atoms and diatomic molecules. The screening constants are allowed to be variationally optimum values for given nuclear separation. The obtained results are compaired with the results those found in the literature. The procedures discussed in this work are capable of yielding highly accurate relativistic two-center one-electron integrals for all ranges of orbital parameters. Besides provides an efficient way to overcome the problems that arise in relativistic calculations.
description: Number of pages is 10 with 3 tables and 1 figure
Collective Bias Models in Two-Tier Voting Systems and the Democracy Deficit
Creators: name: Kirsch, Werner
name: Toth, Gabor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 91B12, 91B14, 60F05

description: We analyse optimal voting weights in two-tier voting systems. In our model, the overall population (or union) is split in groups (or member states) of different sizes. The individuals comprising the overall population constitute the first tier, and the council is the second tier. Each group has a representative in the council that casts votes on their behalf. By "optimal weights", we mean voting weights in the council which minimise the democracy deficit, i.e. the expected deviation of the council vote from a (hypothetical) popular vote. We assume that the voters within each group interact via what we call a local collective bias or common belief (through tradition, common values, strong religious beliefs, etc.). We allow in addition an interaction across group borders via a global bias. Thus, the voting behaviour of each voter depends on the behaviour of all other voters. This correlation may be stronger between voters in the same group, but is in general not zero for voters in different groups. We call the respective voting measure a Collective Bias Model (CBM). The "simple CBM" introduced in [12] and in particular the Impartial Culture and the Impartial Anonymous Culture are special cases of our general model. We compute the optimal weights in the large population limit. Those optimal weights are unique as long as there is no "complete" correlation between the groups. In this case, we obtain optimal weights which are the sum of a common constant equal for all groups and a summand which is proportional to the population of each group. We also analyse the conditions under which the optimal weights are negative, thus making it impossible to reach the theoretical minimum of the democracy deficit. This is a new aspect of the model owed to the correlation between votes belonging to different groups.
description: Overhaul of the article with additional results and more detailed explanations
Location Maps, Building 208, Randolph Air Force Base, Texas
Creators: name: Walter, Chelsea
Year: 1992
Subjects: subject: Randolph Field Historic Landmark District
valueUri: https://core.tdar.org/browse/geographic-keyword/83364/randolph-field-historic-landmark-district
subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Randolph Air Force Base
valueUri: https://core.tdar.org/browse/geographic-keyword/78971/randolph-air-force-base
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Non-Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/309/non-domestic-structures
subject: NRHP
valueUri: https://core.tdar.org/browse/other-keyword/9857/nrhp
subject: Building 208
valueUri: https://core.tdar.org/browse/other-keyword/158484/building-208
subject: Post Garage
valueUri: https://core.tdar.org/browse/other-keyword/158795/post-garage
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Historic Background Research
valueUri: https://core.tdar.org/browse/investigation-type/18/historic-background-research
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: Two maps showing the location of Building 208 at Randolph Air Force Base, Texas. This document is part of a collection of correspondence concerning the proposed rehabilitation of Building 208, a historic Post Garage, at Randolph Air Force Base, Texas. Included are letters of correspondence, Q.M.C. forms, location maps, blueprints and photographs of the structure.
Young Stellar Object Variability (YSOVAR): Long Timescale Variations in the Mid-Infrared
Creators: name: Rebull, L. M.
name: Cody, A. M.
name: Covey, K. R.
name: Guenther, H. M.
name: Hillenbrand, L. A.
name: Plavchan, P.
name: Poppenhaeger, K.
name: Stauffer, J. R.
name: Wolk, S. J.
name: Gutermuth, R.
name: Morales-Calderon, M.
name: Song, I.
name: Barrado, D.
name: Bayo, A.
name: James, D.
name: Hora, J. L.
name: Vrba, F. J.
name: de Oliveira, C. Alves
name: Bouvier, J.
name: Carey, S. J.
name: Carpenter, J. M.
name: Favata, F.
name: Flaherty, K.
name: Forbrich, J.
name: Hernandez, J.
name: McCaughrean, M. J.
name: Megeath, S. T.
name: Micela, G.
name: Smith, H. A.
name: Terebey, S.
name: Turner, N.
name: Allen, L.
name: Ardila, D.
name: Bouy, H.
name: Guieu, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The YSOVAR (Young Stellar Object VARiability) Spitzer Space Telescope observing program obtained the first extensive mid-infrared (3.6 & 4.5 um) time-series photometry of the Orion Nebula Cluster plus smaller footprints in eleven other star-forming cores (AFGL490, NGC1333, MonR2, GGD 12-15, NGC2264, L1688, Serpens Main, Serpens South, IRAS 20050+2720, IC1396A, and Ceph C). There are ~29,000 unique objects with light curves in either or both IRAC channels in the YSOVAR data set. We present the data collection and reduction for the Spitzer and ancillary data, and define the "standard sample" on which we calculate statistics, consisting of fast cadence data, with epochs about twice per day for ~40d. We also define a "standard sample of members", consisting of all the IR-selected members and X-ray selected members. We characterize the standard sample in terms of other properties, such as spectral energy distribution shape. We use three mechanisms to identify variables in the fast cadence data--the Stetson index, a chi^2 fit to a flat light curve, and significant periodicity. We also identified variables on the longest timescales possible of ~6 years, by comparing measurements taken early in the Spitzer mission with the mean from our YSOVAR campaign. The fraction of members in each cluster that are variable on these longest timescales is a function of the ratio of Class I/total members in each cluster, such that clusters with a higher fraction of Class I objects also have a higher fraction of long-term variables. For objects with a YSOVAR-determined period and a [3.6]-[8] color, we find that a star with a longer period is more likely than those with shorter periods to have an IR excess. We do not find any evidence for variability that causes [3.6]-[4.5] excesses to appear or vanish within our data; out of members and field objects combined, at most 0.02% may have transient IR excesses.
description: Accepted to AJ; 38 figures, 93 pages
Deciphering the Influence of Ground-State Distributions on the Calculation of Photolysis Observables
Creators: name: Prlj, Antonio
name: Hollas, Daniel
name: Curchod, Basile F. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Nonadiabatic molecular dynamics offers a powerful tool for studying the photochemistry of molecular systems. Key to any nonadiabatic molecular dynamics simulation is the definition of its initial conditions, ideally representing the initial molecular quantum state of the system of interest. In this work, we provide a detailed analysis of how initial conditions may influence the calculation of experimental observables by focusing on the photochemistry of methylhydroperoxide, the simplest and most abundant organic peroxide in our atmosphere. We investigate the outcome of trajectory surface hopping simulations for distinct sets of initial conditions sampled from different approximate quantum distributions, namely harmonic Wigner functions and ab initio molecular dynamics using a quantum thermostat. Calculating photoabsorption cross-sections, quantum yields, and translational kinetic energy maps from the results of these simulations reveals the significant effect of the initial conditions, in particular when low-frequency (~ a few hundred cm-1) normal modes are connected to the photophysics of the molecule. Overall, our results indicate that sampling initial conditions from ab initio molecular dynamics using a quantum thermostat is preferable for flexible molecules with photoactive low-frequency modes. From a photochemical perspective, our nonadiabatic dynamics simulations offer an explanation for a low-energy tail observed at high excitation energy in the translational kinetic energy map of methylhydroperoxide.
Temperature dependence of lysozyme hydration and the role of elastic energy
Creators: name: Tang, Pei
name: Xu, Yan
name: Wu, Yue
name: Kleinhammes, Alfred
name: Wang, Hai-Jing
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Water plays critical roles in protein dynamics and functions. However, the most basic property of hydration—the water sorption isotherm—remains inadequately understood. Surface adsorption is the commonly adopted picture of hydration. Since it does not account for changes in the conformational entropy of proteins, it is difficult to explain why protein dynamics and activity change upon hydration. The solution picture of hydration provides an alternative approach to describe the thermodynamics of hydration. Here, the flexibility of proteins could influence the hydration level through the change of elastic energy upon hydration. Using nuclear magnetic resonance to measure the isotherms of lysozyme in situ between 18 and 2°C, the present work provides evidence that the part of water uptake associated with the onset of protein function is significantly reduced below 8°C. Quantitative analysis shows that such reduction is directly related to the reduction of protein flexibility and enhanced cost in elastic energy upon hydration at lower temperature. The elastic property derived from the water isotherm agrees with direct mechanical measurements, providing independent support for the solution model. This result also implies that water adsorption at charged and polar groups occurring at low vapor pressure, which is known for softening the protein, is crucial for the later stage of water uptake, leading to the activation of protein dynamics. The present work sheds light on the mutual influence of protein flexibility and hydration, providing the basis for understanding the role of hydration on protein dynamics.
Self-supervision for medical image classification: state-of-the-art performance with ~100 labeled training samples per class
Creators: name: Nielsen, Maximilian
name: Wenderoth, Laura
name: Sentker, Thilo
name: Werner, René
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Is self-supervised deep learning (DL) for medical image analysis already a serious alternative to the de facto standard of end-to-end trained supervised DL? We tackle this question for medical image classification, with a particular focus on one of the currently most limiting factors of the field: the (non-)availability of labeled data. Based on three common medical imaging modalities (bone marrow microscopy, gastrointestinal endoscopy, dermoscopy) and publicly available data sets, we analyze the performance of self-supervised DL within the self-distillation with no labels (DINO) framework. After learning an image representation without use of image labels, conventional machine learning classifiers are applied. The classifiers are fit using a systematically varied number of labeled data (1-1000 samples per class). Exploiting the learned image representation, we achieve state-of-the-art classification performance for all three imaging modalities and data sets with only a fraction of between 1% and 10% of the available labeled data and about 100 labeled samples per class.
Linear magnetoconductivity in magnetic metals
Creators: name: Zyuzin, Vladimir A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically describe a mechanism of low-field linear magnetoconductivity in helical magnetic metals. Two ingredients for the mechanism in three-dimensional metals are identified to be the spin-orbit coupling and momentum-dependent ferromagnetic exchange interaction. We propose and study a number of minimal theoretical models which have linear magnetoconductivity, and discuss their implications for recent experiments.
description: 16 pages, 1 figure
Taxonomies of networks from community structure
Creators: name: Porter, Mason A.
name: Onnela, Jukka-Pekka
name: Reid, Stephen
name: Mucha, Peter J.
name: Fricker, Mark D.
name: Fenn, Daniel J.
name: Jones, Nick S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: The study of networks has become a substantial interdisciplinary endeavor that encompasses myriad disciplines in the natural, social, and information sciences. Here we introduce a framework for constructing taxonomies of networks based on their structural similarities. These networks can arise from any of numerous sources: they can be empirical or synthetic, they can arise from multiple realizations of a single process (either empirical or synthetic), they can represent entirely different systems in different disciplines, etc. Because mesoscopic properties of networks are hypothesized to be important for network function, we base our comparisons on summaries of network community structures. Although we use a specific method for uncovering network communities, much of the introduced framework is independent of that choice. After introducing the framework, we apply it to construct a taxonomy for 746 networks and demonstrate that our approach usefully identifies similar networks. We also construct taxonomies within individual categories of networks, and we thereby expose nontrivial structure. For example, we create taxonomies for similarity networks constructed from both political voting data and financial data. We also construct network taxonomies to compare the social structures of 100 Facebook networks and the growth structures produced by different types of fungi.
OAHP Inventory, Building 143 Building 144, Building 145, Building 146, Building 147, Building 149, Building 2248, and Building 2250 Barracks, Fort Sam Houston, Texas
Creators: name: Walter, Chelsea
Publisher: name: Office of Archaeology and Historic Preservation
Year: 1980
Subjects: subject: Fort Sam Houston
valueUri: https://core.tdar.org/browse/geographic-keyword/83681/fort-sam-houston
subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Fort Sam Houston National Historic Landmark District
valueUri: https://core.tdar.org/browse/geographic-keyword/82955/fort-sam-houston-national-historic-landmark-district
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/256/domestic-structures
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Domestic Structure or Architectural Complex
valueUri: https://core.tdar.org/browse/site-type/251/domestic-structure-or-architectural-complex
subject: Building 145
valueUri: https://core.tdar.org/browse/other-keyword/158461/building-145
subject: OAHP
valueUri: https://core.tdar.org/browse/other-keyword/138292/oahp
subject: Building 143
valueUri: https://core.tdar.org/browse/other-keyword/146295/building-143
subject: Building 144
valueUri: https://core.tdar.org/browse/other-keyword/158439/building-144
subject: Building 146
valueUri: https://core.tdar.org/browse/other-keyword/146296/building-146
subject: Barracks
valueUri: https://core.tdar.org/browse/other-keyword/135131/barracks
subject: Building 2248
valueUri: https://core.tdar.org/browse/other-keyword/146299/building-2248
subject: Building 2250
valueUri: https://core.tdar.org/browse/other-keyword/146300/building-2250
subject: Building 147
valueUri: https://core.tdar.org/browse/other-keyword/146297/building-147
subject: Building 149
valueUri: https://core.tdar.org/browse/other-keyword/146298/building-149
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Architectural Survey
valueUri: https://core.tdar.org/browse/investigation-type/2/architectural-survey
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: An inventory form by the Office of Archaeology and Historic Preservation for Building 143 Building 144, Building 145, Building 146, Building 147, Building 149, Building 2248, and Building 2250 Barracks at Fort Sam Houston, Texas. The structures were built in 1907 and 1908 as barracks. Included in the inventory are black and white photographs taken in 1980 of the structures.
Formprobleme in Bachs frühen Orgelfugen
Creators: name: Breig, Werner
Publisher: name: Bach-Jahrbuch
Year: 2018

description: Nach einleitender Begriffsklärung befasst sich der Artikel eingehender mit dem Corpus des frühen Bach'schen Orgelwerks und widmet sich dabei Fragen der Stilentwicklung, Vorbildern und Kompositionstechniken. Erwähnte Artikel: Christoph Wolff: Johann Adam Reinken und Johann Sebastian Bach: Zum Kontext des Bachschen Frühwerkes. BJ 1985, S. 99-118 Friedhelm Krummacher: Bach und die norddeutsche Orgeltoccata: Fragen und Überlegungen. BJ 1985, S. 119-134 Robert Hill: Die Herkunft von Bachs "Thema Legrenzianum". BJ 1986, S. 105-107 Jean-Claude Zehnder: Georg Böhm und Johann Sebastian Bach: Studien zur Chronologie der Bachschen Stilentwicklung. BJ 1988, S. 73-110 Jean-Claude Zehnder: Giuseppe Torelli und Johann Sebastian Bach. Zu Bachs Weimarer Konzertform. BJ 1991, S. 33-95
description: Bach-Jahrbuch, Bd. 78 (1992)
Multiopinion coevolving voter model with infinitely many phase transitions
Creators: name: Durrett, Richard
name: Shi, Feng
name: Mucha, Peter J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: We consider an idealized model in which individuals’ changing opinions and their social network coevolve, with disagreements between neighbors in the network resolved either through one imitating the opinion of the other or by reassignment of the discordant edge. Specifically, an interaction between x and one of its neighbors y leads to x imitating y with probability (1−α) and otherwise (i.e., with probability α) x cutting its tie to y in order to instead connect to a randomly chosen individual. Building on previous work about the two-opinion case, we study the multiple-opinion situation, finding that the model has infinitely many phase transitions (in the large graph limit with infinitely many initial opinions). Moreover, the formulas describing the end states of these processes are remarkably simple when expressed as a function of β = α/(1 − α).
Johann Sebastian Bachs Oboenkonzerte
Creators: name: Haynes, Bruce
Publisher: name: Bach-Jahrbuch
Year: 2018

description: Der Artikel bemüht sich angesichts des Missverhältnisses zwischen Bachs offensichtlicher Vorliebe für die Oboe in seinen Vokalwerken und dem Fehlen von Kammermusik für das Instrument darum, mögliche verlorengegangene Urbilder von Oboenwerken aus Übertragungen zu rekonstruieren. Bachs nachweisliche Freiheit, eigene wie fremde Werke für andere Besetzungen zu bearbeiten dient hier als Anknüpfungspunkt, die Möglichkeit von Rückübertragungen zu prüfen. Dazu werden zuerst Indizien für deren (ehemaliges) Vorhandensein zusammengetragen und anschließend anhand eines engen Kriterienkataloges, bei dem besonders die Spielbarkeit (Tonart, Umfang, Lage) der Soloparts für Oboe im Zentrum steht, versucht, diese zu ermitteln. Eingehend geprüft werden BWV 12/1, 99/1, BWV 115/1, BWV 125/1, BWV 156/1, BWV 249a/2, BWV 1053, BWV 1055, BWV 1056, BWV 1059, BWV 1060 und BWV 1063, wobei abschließend für vierzehn Einzelsätze die Möglichkeit konstatiert wird, es könne sich im Original um Stücke für Oboe gehandelt haben. Der Autor kompiliert abschließend vier Oboenkonzerte aus zwölf dieser Sätze. Erwähnte Artikel: Werner Neumann: Das "Bachische Collegium Musicum". BJ 1960. S. 5-27 Joshua Rifkin: Ein langsamer Konzertsatz Johann Sebastian Bachs. BJ 1978, S. 140-147
description: Bach-Jahrbuch, Bd. 78 (1992)
Developing selective cross coupling methodology using nickel catalysis
Creators: name: Algie, Jarrod
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Palladium complexes have long been the go-to catalyst for use in cross coupling reactions between organohalides and organometallic reagents due to the ease with which catalyst activity can be tuned, enabling chemo- and regioselectivity. Contrastingly, nickel catalysis is not as well developed, but offers a more sustainable alternative while exhibiting similar reactivity. Within this current study, modulation of chemoselectivity for the oxidative addition of 1-(pseudo)halonaphthalenes to nickel complexes though ligand selection was explored, computationally and experimentally. Density Functional Theory was used to calculate the Gibbs free energy of activation and Gibbs free energy of the oxidative process, whereas kinetic analysis was employed to examine the effect of the ligand used on the rate constant. Overall, the data presented herein provides a framework for selecting appropriate ligands to achieve desired chemoselectivity, as data concerning the reactivity trends for the halides and ligands is described. However, the kinetic studies within this project were significantly more limited in scope, partly due to the inability to synthesise several of the planned nickel complexes and restricted laboratory access resulting from COVID-19. Despite this, unexpected results were obtained, highlighting the potential for unusual selectivity not indicated in the DFT studies.
A Tunable VCO for Multistandard Mobile Receiver
Creators: name: Vibhute, V
name: Stojcevski, A
name: Zayegh, A
name: Fitrio, D
name: Singh, Jugdutt
Publisher: name: La Trobe
Year: 2023

description: IEEE International Workshop on Electronic Design, Test & Applications, (2nd : 2004 : Perth, Australia)
Certification, Environmental Baseline Survey for Demolition of Buildings 376 and 4115, Fort Sam Houston, Texas
Creators: name: Molina, Alberto
name: Walker, David P.
Publisher: name: Environmental and Natural Resources Office
Year: 2001
Subjects: subject: JBSA-Sam Houston
valueUri: https://core.tdar.org/browse/geographic-keyword/82532/jbsa-sam-houston
subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Building 4115
valueUri: https://core.tdar.org/browse/other-keyword/151984/building-4115
subject: Building 376
valueUri: https://core.tdar.org/browse/other-keyword/158156/building-376
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: Signed certification by an inspector and chief of environmental compliance from the Environmental and Natural Resources Office, Fort Sam Houston. The certification is for an environmental baseline survey to be conducted for the demolition of properties on Fort Sam Houston - Building 376 and 4115.
Quantum tomography of entangled qubits by time-resolved single-photon counting with time-continuous measurements
Creators: name: Czerwinski, Artur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this article, we introduce a framework for entanglement characterization by time-resolved single-photon counting with measurement operators defined in the time domain. For a quantum system with unitary dynamics, we generate time-continuous measurements by shifting from the Schrodinger picture to the Heisenberg representation. In particular, we discuss this approach in reference to photonic tomography. To make the measurement scheme realistic, we impose timing uncertainty on photon counts along with the Poisson noise. Then, the framework is tested numerically on quantum tomography of qubits. Next, we investigate the accuracy of the model for polarization-entangled photon pairs. Entanglement detection and precision of state reconstruction are quantified by figures of merit and presented on graphs versus the amount of time uncertainty.
Think locally, act locally: Detection of small, medium-sized, and large communities in large networks
Creators: name: Balachandran, Prakash
name: Jeub, Lucas G. S.
name: Porter, Mason A.
name: Mahoney, Michael W.
name: Mucha, Peter J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: It is common in the study of networks to investigate intermediate-sized (or “meso-scale”) features to try to gain an understanding of network structure and function. For example, numerous algorithms have been developed to try to identify “communities,” which are typically construed as sets of nodes with denser connections internally than with the remainder of a network. In this paper, we adopt a complementary perspective that “communities” are associated with bottlenecks of locally-biased dynamical processes that begin at seed sets of nodes, and we employ several different community-identification procedures (using diffusion-based and geodesic-based dynamics) to investigate community quality as a function of community size. Using several empirical and synthetic networks, we identify several distinct scenarios for “size-resolved community structure” that can arise in real (and realistic) networks: (i) the best small groups of nodes can be better than the best large groups (for a given formulation of the idea of a good community); (ii) the best small groups can have a quality that is comparable to the best medium-sized and large groups; and (iii) the best small groups of nodes can be worse than the best large groups. As we discuss in detail, which of these three cases holds for a given network can make an enormous difference when investigating and making claims about network community structure, and it is important to take this into account to obtain reliable downstream conclusions. Depending on which scenario holds, one may or may not be able to successfully identify “good” communities in a given network (and good communities might not even exist for a given community quality measure), the manner in which different small communities fit together to form meso-scale network structures can be very different, and processes such as viral propagation and information diffusion can exhibit very different dynamics. In addition, our results suggest that, for many large realistic networks, the output of locally-biased methods that focus on communities that are centered around a given seed node might have better conceptual grounding and greater practical utility than the output of global community-detection methods. They also illustrate subtler structural properties that are important to consider in the development of better benchmark networks to test methods for community detection.
The role of defects on CdTe detector performance
Creators: name: Sellin, P. J
name: Lohstroh, A
name: Siffert, P
name: Hoxley, David Ian
name: Ozsan, M. E
name: Sowinska, M
name: Simon, A
Publisher: name: La Trobe
Year: 2023

description: IEEE Nuclear Science Symposium (2003 : Piscataway, NJ.)
Supersymmetric Quantum Mechanics, multiphoton algebras and coherent states
Creators: name: García-Muñoz, Juan D
name: C, David J Fernández
name: Vergara-Méndez, F
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The multiphoton algebras for one-dimensional Hamiltonians with infinite discrete spectrum, and for their associated kth-order SUSY partners are studied. In both cases, such an algebra is generated by the multiphoton annihilation and creation operators, as well as by Hamiltonians which are functions of an appropriate number operator. The algebras obtained turn out to be polynomial deformations of the corresponding single-photon algebra previously studied. The Barut-Girardello coherent states, which are eigenstates of the annihilation operator, are obtained and their uncertainty relations are explored by means of the associated quadratures.
description: Last version of the paper, 6 figures
Experimental Measurement of Single-Wall Carbon Nanotube Torsional Properties
Creators: name: Superfine, R.
name: Falvo, M. R.
name: An, L.
name: Hall, A. R.
name: Vicci, L.
name: Liu, J.
name: Washburn, S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: We report on the characterization of nanometer-scale torsional devices based on individual single-walled carbon nanotubes as the spring elements. The axial shear moduli of the nanotubes are obtained through modeling of device reaction to various amounts of applied electrostatic force and are compared to theoretical values.
A proof of convergence for stochastic gradient descent in the training of artificial neural networks with ReLU activation for constant target functions
Creators: name: Jentzen, Arnulf
name: Riekert, Adrian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this article we study the stochastic gradient descent (SGD) optimization method in the training of fully-connected feedforward artificial neural networks with ReLU activation. The main result of this work proves that the risk of the SGD process converges to zero if the target function under consideration is constant. In the established convergence result the considered artificial neural networks consist of one input layer, one hidden layer, and one output layer (with $d \in \mathbb{N}$ neurons on the input layer, $H \in \mathbb{N}$ neurons on the hidden layer, and one neuron on the output layer). The learning rates of the SGD process are assumed to be sufficiently small and the input data used in the SGD process to train the artificial neural networks is assumed to be independent and identically distributed.
description: 29 pages
Johann Sebastian Bachs Gloria in excelsis Deo BWV 191
Creators: name: Butler, Gregory G.
Publisher: name: Bach-Jahrbuch
Year: 2018

description: Die Bestimmung des Aufführungsanlasses wie die Einordnung in den weiteren Kontext von Bachs Kirchenkantaten sind für BWV 191 schwierig. Beiden Fragen widmet sich der Beitrag und stellt die Komposition in den Kontext eines Friedensfestaktes 1745 und der Entstehung der h-moll-Messe. Erwähnter Artikel: Arnold Schering: Die Hohe Messe in h-moll. BJ 1936, S. 1-30
description: Bach-Jahrbuch, Bd. 78 (1992)
(:unas) unassigned
Creators: name: (:Unkn) Unknown
Publisher: name: Universita' degli Studi di Salerno
Year: 2024

description: Breve nota bio-bibliografica di Torquato Tasso, “usato” non come autore bensì come personaggio letterario, all’interno di altre opere letterarie e in ambito artistico, musicale.
description: Brief bio-bibliographic note on Torquato Tasso, “used” not as an author but as a literary charac ter, within other literary works and in the artistic and musical fields.
Amplification of Tension in Branched Macromolecules
Creators: name: Panyukov, Sergey V.
name: Rubinstein, Michael
name: Sheiko, Sergei S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: We propose a method for the design of branched macromolecules that are capable of building up high tension (~nN) in their covalent bonds without applying an external force. The tension is self-generated due to repulsion between branches and depends on the molecular architecture leading to amplification and focusing of tension in specific bonds. The simplest architecture is a pom-pom composed of a linear spacer and two z-arm stars at its ends resulting in z-fold tension amplification. Adsorption of those macromolecules on a substrate results in further increase in tension as compared to molecules in solution.
Age-Related Changes in Strength, Joint Laxity, and Walking Patterns: Are They Related to Knee Osteoarthritis?
Creators: name: Lewek, M. D
name: Rudolph, K. S
name: Schmitt, L. C
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Aging is associated with musculoskeletal changes and altered walking patterns. These changes are common in people with knee osteoarthritis (OA) and may precipitate the development of OA. We examined age-related changes in musculoskeletal structures and walking patterns to better understand the relationship between aging and knee OA.
Choice Trees: Representing Nondeterministic, Recursive, and Impure Programs in Coq
Creators: name: Chappe, Nicolas
name: He, Paul
name: Henrio, Ludovic
name: Zakowski, Yannick
name: Zdancewic, Steve
Publisher: name: arXiv
Year: 2022
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: This paper introduces Choice Trees (ctrees), a monad for modeling nondeterministic, recursive, and impure programs in Coq. Inspired by Xia et al.'s itrees, this novel data structure embeds computations into coinductive trees with three kind of nodes: external events, and two variants of nondeterministic branching. This apparent redundancy allows us to provide shallow embedding of denotational models with internal choice in the style of ccs, while recovering an inductive LTS view of the computation. CTrees inherit a vast collection of bisimulation and refinement tools, with respect to which we establish a rich equational theory. We connect ctrees to the itrees infrastructure by showing how a monad morphism embedding the former into the latter permits to use ctrees to implement nondeterministic effects. We demonstrate the utility of ctrees by using them to model concurrency semantics in two case studies: ccs and cooperative multithreading.