cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Properties of the 24 Day Modulation in GX 13+1 from Near-Infrared and X-ray Observations
Creators: name: Corbet, Robin H. D.
name: Pearlman, Aaron B.
name: Buxton, Michelle
name: Levine, Alan M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A 24 day period for the low-mass X-ray binary GX 13+1 was previously proposed on the basis of 7 years of RXTE ASM observations (Corbet 2003) and it was suggested that this was the orbital period of the system. This would make it the one of the longest known orbital periods for a Galactic low-mass X-ray binary powered by Roche lobe overflow. We present here the results of: (i) K-band photometry obtained with the SMARTS Consortium CTIO 1.3 telescope on 68 nights over a 10 month interval; (ii) Continued monitoring with the RXTE ASM, analyzed using a semi-weighted power spectrum instead of the data filtering technique previously used; and (iii) Swift BAT hard X-ray observations. Modulation near 24 days is seen in both the K-band and additional statistically independent ASM X-ray observations. However, the modulation in the ASM is not strictly periodic. The periodicity is also not detected in the Swift BAT observations, but modulation at the same relative level as seen with the ASM cannot be ruled out. If the 24 day period is the orbital period of system, this implies that the X-ray modulation is caused by structure that is not fixed in location. A possible mechanism for the X-ray modulation is the dipping behavior recently reported from XMM-Newton observations.
description: Accepted for publication in the Astrophysical Journal
Lattice expansion from isotope substitution in the Iron based superconductors
Creators: name: Kim, Oleg
name: Granath, Mats
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We estimate the changes in lattice parameters due to iron isotope substitution in the iron-based high temperature superconductors using a variational calculation based on the anharmonicity of the Fe-As(Se) bond. For BaFe2As2 and 57Fe to 54$Fe substitution we find a c-axis expansion of 1 10^{-3}Å and in-plane a-axis contraction of 1 10^{-5}Å at 250K in good agreement with experimental values on (Ba,K)Fe2As2 for which a negative isotope exponent α=-\frac{d\ln T_c}{d\ln m}<0 was found [P.M. Shirage et al., Phys. Rev. Lett. 103, 257003 (2009)]. For FeSe in contrast we find an expansion for both a and c lattice parameters. We discuss the relevance of these isotope induced changes of lattice parameters to the isotope effect in light of the well established sensitivity to the Fe-As(Se) coordination.
description: 4 pages, 3 figures
Shape anisotropy of polymers in disordered environment
Creators: name: Blavatska, Viktoria
name: Janke, Wolfhard
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the influence of structural obstacles in a disordered environment on the size and shape characteristics of long flexible polymer macromolecules. We use the model of self-avoiding random walks on diluted regular lattices at the percolation threshold in space dimensions d=2, 3. Applying the Pruned-Enriched Rosenbluth Method (PERM), we numerically estimate rotationally invariant universal quantities such as the averaged asphericity A_d and prolateness S of polymer chain configurations. Our results quantitatively reveal the extent of anisotropy of macromolecules due to the presence of structural defects.
description: 8 pages
Ellipsoidal anisotropies in linear elasticity Extension of Saint Venant's work to phenomenological modelling of materials
Creators: name: Pouya, Ahmad
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Several families of elastic anisotropies were introduced by Saint Venant (1863) for which the polar diagram of elastic parameters in different directions of the material (indicator surface) are ellipsoidal. These families recover a large variety of models introduced in recent years for damaged materials or as effective modulus of heterogeneous materials. On the other hand, ellipsoidal anisotropy has been used as a guideline in phenomenological modeling of materials. A question that then naturally arises is to know in which conditions the assumption that some indicator surfaces are ellipsoidal allows one to entirely determine the elastic constants. This question has not been rigorously studied in the literature. In this paper, first several basic classes of ellipsoidal anisotropy are presented. Then the problem of determination of the elastic parameters from indicator surfaces is discussed in several basic cases that can occur in phenomenological modelling. Finally the compatibility between the assumption of ellipsoidal form for different indicator surfaces is discussed and in particular, it is shown that if the indicator surfaces of the fourth root of E(n) and of 1/c(n) where E(n) and c(n) are respectively the Young's modulus and the elastic coefficient in the direction n) are ellipsoidal, then the two ellipsoids have necessarily the same principal axes and the material in this case is orthotropic.
Additional file 2 of Biogeographic traits of dimethyl sulfide and dimethylsulfoniopropionate cycling in polar oceans
Creators: name: Teng, Zhao-Jie
name: Qin, Qi-Long
name: Zhang, Weipeng
name: Li, Jian
name: Fu, Hui-Hui
name: Wang, Peng
name: Lan, Musheng
name: Lu, Guangfu
name: He, Jianfeng
name: McMinn, Andrew
name: Wang, Min
name: Chen, Xiu-Lan
name: Zhang, Yu-Zhong
name: Chen, Yin
name: Li, Chun-Yang
Publisher: name: figshare
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: Oceanography

description: Additional file 1: Figure S1. Analysis of conserved amino acid residues involved in substrate binding and catalysis of DddK (a), DddQ (b), DddY (c), Tmm (d), DddP (e), DmdA (f) and DMSOR (g) retrieved from polar metagenomic samples. Figure S2. Maximum likelihood trees of the predicted hits of the top five most abundant genes (DddP, DddK, DddK, DmdA, Tmm) involved in DMSP/DMS cycling which were retrieved from the polar metagenomes, Tara metagenomes/metatranscriptomes datasets. Figure S3. Correlation between dissimilarity of DMS/DMSP related bacterial community and water depth in polar oceans.
Adeline and Brother, Daniel Schellinger, 1902
Creators: name: Kelsey, Carleton
name: Amagansett Historical Association
Publisher: name: Unknown
Year: 1902
Subjects: Photographs
Dwellings
Amagansett
Schellinger Family
People

description: This images shows Adeline and her brother, Daniel Schellinger, outside home in Amagansett in December of 1902.
description: This photograph is part of the collection of the Carleton Kelsey Collection of the Amagansett Historical Association. Kelsey was a local historian and librarian who collected photographs from others to add to the many photographs he took of the community himself.
The Truth about OnlyFans: Disempowering and Unsustainable for Women's Fight for Gender Equity
Creators: name: Pham, Elise
Publisher: name: Zenodo
Year: 2023

description: From its surface, OnlyFans seems to represent a pivot away from traditional sex work – a platform that leverages women’s control over their role in sex work, pricing of their content, and financial choices outside of the platform. Yet upon closer inspection, OnlyFans is rather a modern extension of the intrinsic disempowerment of women in traditional sex work because women OnlyFans creators inevitably objectify their bodies for profit, thus continuing the subordination of women under men. Individuals must not let the prospect of financial freedom conferred by OnlyFans mask them from realizing that short-term sovereignty from an individual scale fails to progress long-term sovereignty from a societal scale. Only through critiquing OnlyFans as a form of neoliberal feminism and reducing the financial attractiveness of the online gig industry will we be able to limit access to sources that authorize sexual voyeurism of women, minimize their sovereignty, and systematize their commodification. 
title: Attitude and Reflection Parameter Estimation of Resident Space Objects Using Ground-Based Photometry
Creators: name: Bernard, Arun J.
Publisher: name: Utah State University
Year: 2021

description: There are currently thousands of objects orbiting Earth, and this number is only going to increase. Larger number of satellites will require that operators have a greater knowledge of the state their assets. Electro-optical telescopes are currently being used to observe and track many of these objects. When using these telescopes to take images of satellites, they often appear as dots in the image. Depending on the surface properties of the satellite, and its orientation at a given time, the dots in the image can appear brighter or dimmer. Photometry measurements are a quantification of how bright the object appears. The time series of these photometry measurements are called light curves. The purpose of this research is to use light curves to determine the orientation (i.e. attitude), and surface reflection parameters of space object. Included in this research is the comparison of different attitude estimation algorithms, an in-depth analysis of the different variables affecting the ability to obtain accurate attitude estimates using light curves, an analysis of the benefits of using a one or two observatories to collect measurements, and the proposal and evaluation of different methods for accounting for the uncertainty in shape model reflection parameters.
title: Testing an Acceptance and Commitment Therapy Website for Hoarding: A Randomized Waitlist-Controlled Trial
Creators: name: Krafft, Jennifer
Publisher: name: Utah State University
Year: 2021

description: Hoarding disorder is relatively common and seriously affects those who experience it. However, it is difficult to access hoarding treatment, due to barriers such as availability and stigma. Moreover, only one treatment is well-established for hoarding (CBT), and it does not directly address important processes such as mindfulness and acceptance. Therefore, in order to make treatment more useful and easy to access, this study tested a self-help program that focused on teaching mindfulness and acceptance as related to hoarding. The self-help program was compared to a waitlist condition; participants were randomly assigned to use the website or wait 12 weeks. The website was structured as 16 self-help modules tailored for hoarding. The program was implemented as an 8-week treatment with a 4-week follow-up period, and supportive coaching was provided during the 8-week treatment period. The sample included 73 individuals with problematic hoarding symptoms; as is common in hoarding treatment studies, participants were mostly white and female. These participants were slightly less white and somewhat younger compared to participants in studies on traditional therapy. Overall, results suggested that the program was helpful and participants found it satisfactory. Those who used the website improved significantly more than the waitlist on overall hoarding symptoms, overall difficulties in functioning, self-stigma, and progress toward personal values. Many participants did not finish the program, and many still had a problematic level of hoarding symptoms after treatment, which suggests room for improvement. Participants overall found the website satisfactory and easy to use, and perceived it as likely to be helpful. It is unclear what processes led to improvement in the treatment condition, although increasing mindful awareness and reducing rigid responses to thoughts and feelings about acquiring belongings may have contributed. Future studies should test this treatment in more diverse participants and compare it to other types of treatment options. However, these results suggest that a self-help website teaching mindfulness and acceptance skills is likely to be useful for people with hoarding problems.
How and why people make judgments about the practical, moral, and societal implications of neuroenhancement technologies
Creators: name: Fitz, Nicholas S.
Publisher: name: University of British Columbia
Year: 2016

description: In the last several decades, there has been a fiery interdisciplinary debate about the use of biomedical technologies that purportedly enhance mental abilities. While critics and enthusiasts bicker over issues such as safety, pressure, fairness, authenticity, and more, the world moves forward. So what does the general public think? What factors shape their judgments? And what explains our current social norms? To answer these questions, I conducted seven randomized studies (n=7,754) using quantitative and mixed-method methods. I find that risk-benefit judgments track the canonical therapy-enhancement distinction for pills and consumer brain stimulation devices, and that the occupation, but not the gender, of the user influences this calculus (Study 1); perceptions of pressure but not likelihood to use are influenced by peer and societal pressure around pills, brain stimulation, and software (Study 2); the amount of effort and the source of financial resources affect attitudes about the fairness of unequal distribution of enhancement (Study 3); the use of pharmaceuticals and the outcomes of such use in the workplace shape judgments of authentic achievement and worthiness of promotion (Study 4); the occupation of the worker does not affect preferences but does influence obligation judgments, and these attitudes are primarily driven by perceptions of societal benefit and secondarily mediated by perceived prevalence (Studies 5-7). I discuss the implications of these findings for research in neuroethics, social science, and public policy.
ERC Locus Ludi, Université de Fribourg, Portes ouvertes, Samedi 25 Septembre. Jouer comme au temps des Romains !
Creators: name: Dasen, Véronique
name: Marie-Lys Arnette
Publisher: name: Zenodo
Year: 2021

description: L'archéologie a mis au jour de nombreuses pièces de jeux et autres objets ludiques du temps des Romains. Les jeux « de toujours » suivent des règles qui reflètent la société et la culture de leur temps. Rejoignez-nous, entre 12:00 et 18:30 à la Bibliothèque des Sciences de l'Antiquité (rue Pierre-Aeby 16) et essayez de nombreux jeux de l'Antiquité !
Study of the dependence of 198Au half-life on source geometry
Creators: name: Lindstrom, R. M.
name: Fischbach, E.
name: Buncher, J. B.
name: Greene, G. L.
name: Jenkins, J. H.
name: Krause, D. E.
name: Mattes, J. J.
name: Yue, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report the results of an experiment to determine whether the half-life of \Au{198} depends on the shape of the source. This study was motivated by recent suggestions that nuclear decay rates may be affected by solar activity, perhaps arising from solar neutrinos. If this were the case then the $β$-decay rates, or half-lives, of a thin foil sample and a spherical sample of gold of the same mass and activity could be different. We find for \Au{198}, $(T_{1/2})_{\rm foil}/(T_{1/2})_{\rm sphere} = 0.999 \pm 0.002$, where $T_{1/2}$ is the mean half-life. The maximum neutrino flux at the sample in our experiments was several times greater than the flux of solar neutrinos at the surface of the Earth. We show that this increase in flux leads to a significant improvement in the limits that can be inferred on a possible solar contribution to nuclear decays.
description: 5 pages, 1 figure
title: International Threats and United States Congressional Behavior From 1981 –2013
Creators: name: Randall, Elizabeth
Publisher: name: Utah State University
Year: 2021

description: This paper explores the relationship between a foreign threat and the behavior of members of Congress. Understanding how members of Congress respond to potentially threatening international situations can provide important insight into foreign policy and future responses to new threats. I use information about how legislators vote, their ideology and party, and the topic of legislation to measure how liberal or conservative members of Congress are on foreign policy legislation. This allows me to analyze both how members of Congress behave inside their parties and how they interact with the other party, or in other words, intraparty cohesion and interparty polarization.
I find that the parties moderate their positions on foreign policy (relative to all other issues) when a foreign threat is present and the majority in Congress will approach foreign policy from a more moderate angle than the minority party at times of foreign threat; these effects, however, are substantively modest. I also find that party members agree amongst themselves less on foreign policy than on other issues. My results indicate that internal party behavior and interactions between parties are not strongly affected by the presence of a foreign threat.
Incorporating stand-health metrics into monitoring the effects of soil disturbance during logging on long-term forest productivity
Creators: name: Reid, Anya Martina
Publisher: name: University of British Columbia
Year: 2016

description: Stand volumes at rotation are usually predicted from models based on tree growth, assuming that fast-growing trees are, and will remain, healthy. However, greater-than-expected disease occurrence on dominant trees has been reported in regenerating forests in British Columbia (BC), suggesting that forest-productivity monitoring should include health measurements. In this thesis, I assess growth and health of lodgepole pine at six installations of the Long-Term Soil Productivity (LTSP) project 15 to 20 years after soil-disturbance treatments (organic-matter removal and soil compaction). To determine treatment effects on forest health, 5400 lodgepole pine seedlings at six sites were examined for vigour and pest occurrence. Treatment effects differed among sites, suggesting that the effects of the soil-disturbance treatments on forest health are context-dependent. Larger trees generally had higher frequency of disease, contradicting the assumption that fast-growing trees are healthy. Spectral-reflectance indices of greenness calculated from aerial images correlated with ground-based measures of tree vigour and foliar disease, indicating a role for remote-sensing techniques in forest health monitoring. Topsoil-nutrient content was reduced in the forest-floor removal treatment plots, with foliar phosphorus and potassium concentrations (%) being reduced in the three older sites in the sub-boreal spruce zone. The forest-floor removal treatment was also associated with lower abundance of ectomycorrhizae, but greater abundance Suillus sp., a fungus that is associated with nitrogen-fixing diazatrophic bacteria. The main predictive growth-and-yield model used in BC (called TASS with the interface TIPSY), underestimated tree height (m) but overestimated stand density (stems/ha) at the six sites, suggesting greater-than-predicted tree mortality. Monitoring forest health in conjunction with tree growth after free-to-grow standards are met is recommended for more accurate management of long-term forest productivity.
Global limits on kinetic Alfvénon speed in quasineutral plasmas
Creators: name: Akbari-Moghanjoughi, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Large amplitude kinetic Alfvénon (exact Alfvén soliton) matching condition is investigated in quasineutral electron-ion and electron-positron-ion plasmas immersed in a uniform magnetic field. Using the standard pseudopotential method, the magnetohydrodynamics (MHD) equations are exactly solved and a global allowed matching condition for propagation of kinetic solitary waves is derived. It is remarked that, depending on the plasma parameters, the kinetic solitons can be sub- or super-Alfvénic, in general. It is further revealed that, either upper or lower soliton speed-limit is independent of fractional plasma parameters. Furthermore, the soliton propagation angle with respect to that of the uniform magnetic field is found to play a fundamental role in controlling the soliton matching speed-range.
description: To be published in Physics of Plasmas
title: Nitrogen Fertilizer Showed Little Effect on First- and Second-Year Corn Yield and Quality Following Alfalfa
Creators: name: Shaffer, Bailey Brent
Publisher: name: Utah State University
Year: 2021

description: Silage corn (Zea mays L.) following alfalfa (Medicago sativa L.) is a common crop rotation in Utah and southern Idaho. This is done, in part, to take advantage of residual nitrogen (N) fixed by bacteria that work in symbiosis with the roots of alfalfa. After alfalfa is terminated, much of the N that was fixed by the plant is released into the soil and becomes available for use by the rotational crop. This reduces the amount of N fertilizer that growers need to apply. The Utah Fertilizer Guide currently recommends an N credit to a rotational crop following alfalfa of 112 kg N ha-1. On-farm experiments were conducted to test whether this credit is valid and to what extent residual N from a previous alfalfa crop benefits corn silage yield and quality in the first- and second-year corn following alfalfa. Four N rates were tested in this experiment (0, 56, 112, and 224 kg N ha-1). The data from 27 site-years of first-year corn showed that yield increased from 22.1 to 23.1 Mg ha-1 as the nitrogen application increased from 0 to 224 kg N ha-1. The economic optimum nitrogen rate (EONR) was lower than the currently accepted recommended rate on all 27 first-year sites. Nine site-years of second-year corn showed that yield also increased 19.8 to 21.8 Mg ha-1 as application rate went from 0 to 224 kg N ha-1. Eight of the nine sites had an EONR of 0 kg N ha-1. A better understanding of how residual nitrogen affects crop growth will improve nitrogen recommendations and reduce farm costs for rotational crops following alfalfa.
The small x gluon and b\bar{b} production at the LHC
Creators: name: de Oliveira, E. G.
name: Martin, A. D.
name: Ryskin, M. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study open b\bar{b} production at large rapidity at the LHC in an attempt to pin down the gluon distribution at very low x. For the LHC energy of 7 TeV, at next-to-leading order (NLO), there is a large factorization scale uncertainty. We show that the uncertainty can be greatly reduced if events are selected in which the transverse momenta of the two B-mesons balance each other to some accuracy, that is |\vec p_{1T}+\vec p_{2T}| < k_0. This will fix the scale μ_F \simeq k_0, and will allow the LHCb experiment, in particular, to study the x-behaviour of gluon distribution down to x ~ 10^{-5}, at rather low scales, μ~ 2 GeV. We evaluate the expected cross sections using, for illustrative purposes, various recent sets of Parton Distribution Functions.
description: 13 pages, 5 figures
Asymptotic Properties of Optimal Trajectories in Dynamic Programming
Creators: name: Sorin, Sylvain
name: Venel, Xavier
name: Vigeral, Guillaume
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We prove in a dynamic programming framework that uniform convergence of the finite horizon values implies that asymptotically the average accumulated payoff is constant on optimal trajectories. We analyze and discuss several possible extensions to two-person games.
description: 9 pages
Additional file 1: of Antibiotic resistance and molecular characterization of diarrheagenic Escherichia coli and non-typhoidal Salmonella strains isolated from infections in Southwest China
Creators: name: Zhang, Shun-Xian
name: Zhou, Yong-Ming
name: Tian, Li-Guang
name: Chen, Jia-Xu
name: Tinoco-Torres, Rita
name: Serrano, Emmanuel
name: Li, Shi-Zhu
name: Chen, Shao-Hong
name: Ai, Lin
name: Chen, Jun-Hu
name: Xia, Shang
name: Lu, Yan
name: Lv, Shan
name: Teng, Xue-Jiao
name: Xu, Wen
name: Gu, Wen-Peng
name: Gong, Si-Tang
name: Zhou, Xiao-Nong
name: Geng, Lan-Lan
name: Hu, Wei
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Multilingual abstract in the five official working languages of the United Nations. (PDF 838Â kb)
Einfluss von Kohlenstoff Nanopartikeln auf die Zellphysiologie - mechanistische Studien zur toxischen Wirkung
Creators: name: Pulskamp, Karin
Publisher: name: Karlsruhe
Year: 2008

description: Kohlenstoff Nanoröhren (CNTs) stellen wichtige Vertreter von Nanomaterialien dar. Eine potentielle Toxizität dieser Matierialien wurde im in vitro Zellsystem (A549, ECV304) eingehend untersucht und charakterisiert. Nach intrazellulärer Aufnahme konnte jedoch keine akute Cytotoxizität der CNTs beobachtet werden. Eine Schlüsselrolle in der CNT-induzierten Toxizität scheint jedoch die Fähigkeit einzunehmen, in Abhängigkeit ihrer Verunreinigungen Oxidativen Stress zu induzieren.
A fluoroscopy-based intraoperative tool for measuring alignments in spinal deformity correction surgery
Creators: name: Amini, Mohammad
Publisher: name: University of British Columbia
Year: 2016

description: Spinal deformity is any abnormal formation, alignment, or shape of the vertebral column which can lead to pain and disability. In severe cases, corrective surgery is recommended for improving the spinal alignment with the goal of reducing pain and improving patient mobility. Although accurate intraoperative assessments of spinal alignments can highly influence patient outcomes, it still remains a technically challenging task due to the limited field of view or poor image quality of existing intraoperative tools. Therefore, the objective of this thesis is to develop a new intraoperative tool for radiographic assessment of long anatomies with a focus on spinal deformity correction surgery. An image-based technique is developed to produce long calibrated images on the surgical table. The system was validated by performing experiments on phantom objects and four cadaveric specimens. The sagittal and coronal radiographic parameters were measured on the generated long views and compared against the ground-truth data collected from computed tomography. The usability of the system, in terms of radiation exposure and the required time for image acquisition and processing, was compared against a long radiographic plain film method. Tests on the phantoms demonstrated localization accuracies of 3.9±2.3mm, and 0.6±0.7°, and stitching accuracies of 0.6±0.6mm and 2.5±1mm for coronal and sagittal views. From in-vitro experiments, on the coronal plane, the accuracies of radiographic measurements for spinal alignment angles and global spinal balance measurements were 1.1±0.7° and 0.9±0.7mm, respectively. On the sagittal plane, the Cobb angle measurement accuracy was 2.3±1.2°. The calculated radiation exposure and required time for image acquisition and processing were 2616mR and 12 minutes, which were 46% and 60% of the corresponding estimated values of long radiographic plain film method. The introduced technique showed promising results for monitoring the spinopelvic alignments in both coronal and sagittal planes with accuracies within the clinically acceptable range of <5mm and <5°, while the radiation exposure and time of image acquisition are kept lower than the corresponding values from competing methods. The proposed solution can potentially assist improve the outcomes of spinal deformity correction surgeries and similar surgical interventions where accurate assessment of long anatomies is critically important.
Neues Konzept zur Planung, Ausführung und Überwachung von Roboteraufgaben mit hierarchischen Petri-Netzen
Creators: name: Lehmann, Arne
Publisher: name: Karlsruhe
Year: 2008

description: Es wird gezeigt, wie die aufgabenausführungsrelevanten Komponenten einer hybriden Steuerungsarchitektur mit Hilfe von hierarchischen Petri-Netzen umgesetzt, integriert und mit Überwachungsmodulen verknüpft werden können. Hierzu wird zunächst ein Konzept zur Generierung von Aufgabenwissen vorgeschlagen, das es erlaubt Bausteine komplexer Handlungen systematisiert zu entwerfen. Im Anschluss wird ein neues Konzept zur online Überwachung von Bewegungsvorgängen bei humanoiden Robotern vorgestellt.
On Chern-Simons Quivers and Toric Geometry
Creators: name: Belhaj, Adil
name: Diaz, Pablo
name: del Moral, Maria Pilar Garcia
name: Segui, Antonio
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss a class of 3-dimensional N=4 Chern-Simons (CS) quiver gauge models obtained from M-theory compactifications on singular complex 4-dimensional hyper-Kahler (HK) manifolds, which are realized explicitly as a cotangent bundle over two-Fano toric varieties V^2. The corresponding CS gauge models are encoded in quivers similar to toric diagrams of V^2. Using toric geometry, it is shown that the constraints on CS levels can be related to toric equations determining V^2.
description: 14pg, 1 Figure, latex
title: Plug-and-Play SQL
Creators: name: Swami, Shubham
Publisher: name: Utah State University
Year: 2021

description: We present an efficient model to retrieve data from a database by implementing plug-and-play queries using the query guards. The model is efficient in the sense that it saves time when writing a query and promotes query portability and reuse. A plug-and-play query is a freestanding query that can couple to any data socket and self determine whether it can be evaluated reliably on the data. We use hierarchies to improve SQL querying in a way that eliminates the need to write a view to construct virtual tables or a set of tables to run a query. The hierarchy is a declarative specification of the desired shape of data rather than a description of how the data is organized. The advantage is that the common use of logical or semantic pointers in the SQL queries is eliminated and a natural way to group data for aggregation is provided. The plug-and-play queries have several advantages, they are portable and can be used to evaluate any data source.
Spectral Properties of Wigner Matrices
Creators: name: Schlein, Benjamin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In these notes we review recent progress (and, in Section \ref{sec:ados}, we announce a new result) concerning the statistical properties of the spectrum of Wigner random matrices.
description: 14 pages, contribution to the Proceedings of the Conference QMath 11 held in Hradec Kralove (Czechia) in September 2010
title: A Phenological Model for a Southern Population of Mountain Pine Beetle
Creators: name: Wangen, Catherine E.
Publisher: name: Utah State University
Year: 2021

description: The mountain pine beetle (MPB, Dendroctonus ponderosae Hopkins) attacks living Pinus trees across a widespread area of western North America, causing significant ecological and economic damage. The ability to make accurate predictions of how MPB populations across this range will respond to temperatures, which affect MPB progress through life stages, is essential. Northern and southern populations of MPB are genetically different in response to temperature, requiring geographic-specific model parameters. There is not currently a predictive model for the southern MPB life cycle, despite concerns that those populations may be more susceptible to increased numbers of generations per year, which would have devastating impacts on pine forests. In this thesis I develop a novel oviposition model for populations of southern MPB, which I incorporate into a cohort model that allows estimation of previously unknown development rates for the southern MPB teneral adult stage, resulting in a complete southern MPB life cycle model.
In Chapter 2 I develop a predictive oviposition model for a southern population of mountain pine beetle using the oviposition (egg-laying) rate curve developed by McManis et al. (2019), incorporating variation in both oviposition rate and fecundity. I also introduce a method for determining the time delay before oviposition, t0. The model can return the probability of oviposition for a season of MPB attacks using phloem (inner-bark) temperature and adult MPB attack data collected from the field. I also develop an asymptotic approximation of MPB oviposition that is less complex as well as less computationally taxing. The detailed oviposition model and its asymptotic approximation are compared with other previously used modeling methods. The predictive capacity of each model is evaluated against laboratory data collected on southern MPB oviposition.
McManis et al. (2018) parameterized development from eggs through pupation for a southern MPB population, but were unable to procure developmental data for the difficult-to-observe teneral adult stage. In Chapter 3 I determine developmental rates for the teneral adult stage using a phenology model and the field data for a southern population of MPB.I first present the incorporated models as well as teneral adult rate curves tested while developing the model. Then I explain the method by which the teneral adult rate curves were parameterized and how the Brière curve was determined to be most suitable. The resulting model is validated using an additional tree from the field data. The complete model is then used to examine the potential for bivoltinism in a southern population of MPB by increasing the mean temperature and testing for the successful emergence of a second generation. My model estimates that that southern MPB are unlikely to become bivoltine in warmer temperatures due to upper developmental thresholds of teneral adults.
Doping driven Small-to-Large Fermi surface transition and d-wave superconductivity in a two-dimenional Kondo lattice
Creators: name: Eder, R.
name: Wrobel, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the two-dimensional Kondo lattice model with an additional Heisenberg exchange between localized spins. In a first step we use mean-field theory with two order parameters. The first order parameter is a complex pairing amplitude between conduction electrons and localized spins which describes condensation of Kondo (or Zhang-Rice) singlets. A nonvanishing value implies that the localized spins contribute to the Fermi surface volume. The second order parameter describes singlet-pairing between the localized spins and competes with the Kondo-pairing order parameter. Reduction of the carrier density in the conduction band reduces the energy gain due to the formation of the large Fermi surface and induces a phase transition to a state with strong singlet correlations between the localized spins and a Fermi surface which comprises only the conduction electrons. The model thus shows a doping-driven change of its Fermi surface volume. At intermediate doping and low temperature there is a phase where both order parameters coexist, which has a gapped large Fermi surface and d-wave superconductivity. The theory thus qualitatively reproduces the phase diagram of cuprate superconductors. In the second part of the paper we show how the two phases with different Fermi surface volume emerge in a strong coupling theory applicable in limit of large Kondo exchange. The large-Fermi-surface phase corresponds to a `vacuum' of localized Kondo singlets with uniform phase and the quasiparticles are spin-1/2 charge fluctuations around this fully paired state. In the small-Fermi-surface phase the quasiparticles correspond to propagating Kondo-singlets or triplets whereby the phase of a given Kondo-singlet corresponds to its momentum. In this picture a phase transition occurs for low filling of the conduction band as well.
description: Revtex file, 17 pages, 14 eps-figures
Invariant percolation and measured theory of nonamenable groups
Creators: name: Houdayer, Cyril
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: Using percolation techniques, Gaboriau and Lyons recently proved that every countable, discrete, nonamenable group $Γ$ contains measurably the free group $\mathbf F_2$ on two generators: there exists a probability measure-preserving, essentially free, ergodic action of $\mathbf F_2$ on $([0, 1]^Γ, λ^Γ)$ such that almost every $Γ$-orbit of the Bernoulli shift splits into $\mathbf F_2$-orbits. A combination of this result and works of Ioana and Epstein shows that every countable, discrete, nonamenable group admits uncountably many non-orbit equivalent actions.
description: Bourbaki seminar, 33 pages
Additional file 1 of Understanding China’s urban system evolution from web search index data
Creators: name: Guo, Hao
name: Zhang, Weiyu
name: Du, Haode
name: Kang, Chaogui
name: Liu, Yu
Publisher: name: figshare
Year: 2022
Subjects: Medicine
Neuroscience
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Developmental Biology
Cancer
Mental Health

description: Including supplementary data, as well as detailed discussions on toponym ambiguity, comparison experiments on gravity model forms and distance metrics, implementation details and comparison experiments of particle swarm algorithms. (DOCX 49 kB)
O trabalho acadêmico e o produtivismo materializados nas políticas de avaliação: o chão da fábrica da avaliação do trabalho docente universitário
Creators: name: Carlos de Souza, André Barcellos
name: Garcia, Lênin Tomazett
name: Castro, Maria das Graças Monteiro
Publisher: name: Zenodo
Year: 2021

description: Trabalho apresentado no Evento: XXVIII Seminário Nacional UNIVERSITAS/BR.
Electronic structure of two-dimensional hexagonal diselenides: charge density waves and pseudogap behavior
Creators: name: Kuchinskii, E. Z.
name: Nekrasov, I. A.
name: Sadovskii, M. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present theoretical study of electronic structure (spectral functions and Fermi surfaces) for incommensurate pseudogap and charge density wave (CDW) and commensurate CDW phases of quasi two dimensional diselenides 2H-TaSe2 and 2H-NbSe2. Incommensurate pseudogap regime is described within the scenario based on short-range order CDW fluctuations, considered within the static Gaussian random field model. In contrast e.g. to high-Tc cuprates layered dichalcogenides have several different CDW scattering vectors and electronic spectrum with two bands at the Fermi level. To this end we present theoretical background for the description of multiple scattering processes within multiple bands electronic spectrum. Thus obtained theoretical spectral functions and Fermi surfaces are compared with recent ARPES experimental data, demonstrating rather good qualitative agreement.
description: 22 pages, 13 figures, 1 table
title: Determination of the Structure, Function, and Mechanism of Type IV CRISPR-Cas Prokaryotic Defense Systems
Creators: name: Taylor, Hannah Nicole
Publisher: name: Utah State University
Year: 2021

description: Bacteria are under constant threat of invasion by bacteriophage (viruses which infect bacteria). To prevent bacteriophage from entering and overtaking the bacteria, bacteria utilize defense systems to identify and destroy foreign elements. One method of defense is called CRISPR-Cas (Clustered Regularly Interspaced Short Palindromic Repeats – CRISPR-Associated). Many different bacteria and most archaea use CRISPR-Cas systems. There are many diverse types of CRISPR-Cas systems, each of which provides defense in a slightly different way. One such CRISPR-Cas type is called type IV. The type IV CRISPR-Cas system is poorly understood and there are very few studies published on type IV systems. This dissertation details some of the first studies done on type IV systems, showing that some type IV systems are indeed defense systems, while others may have evolved a non-defense function. Several biochemical studies were performed to better understand the underlying mechanisms of type IV systems. Historically, the study of CRISPR-Cas mechanisms has led to innovations in gene editing, cancer research, diagnostics, therapeutics, and much more. The work described here significantly furthers the CRISPR-Cas field and may lead to the discovery of new, impactful mechanisms and biological tools.
Impact of conjugated olefins on nickel-molybdenum-sulphide supported on gamma-alumina catalyst deactivation and fouling of naphtha hydrotreaters
Creators: name: Alzaid, Ali H.
Publisher: name: University of British Columbia
Year: 2016

description: This dissertation investigates the reactions of conjugated olefins that lead to catalyst deactivation and fouling in naphtha hydrotreater reactors using a commercial Ni-Mo-S/γ-Al₂O₃ catalyst. The reactions were performed in a micro-scale fixed bed reactor system operated at 150-250°C, 3-4 MPa H₂, LHSV of 1-8 hr-¹ and a H₂/feed ratio of 392-1200 standard mL/mL. During isoprene hydrogenation, an increase in dimerization activity with temperature was attributed to a higher activation energy of dimerization compared to hydrogenation. Conjugated olefin content was also shown to impact oligomerization as an increase in the conjugated olefin content resulted in a decrease in hydrogenation product yield while the oligomerization activity and gum content increased. By investigating different olefin structures, conjugation was shown to enhance dimerization/oligomerization while steric hindrance limited dimer/oligomer formation by limiting access and reactivity of the double bonds. The addition of cyclohexene to 4-methylstyrene resulted in a significant loss in catalyst hydrogenation activity while the dimerization activity remained almost the same for a period of up to 30 days time-on-stream. The loss in catalyst activity can be attributed to a higher concentration of 4-methylstyrene when the overall conversion was lower, resulting in higher dimerization and gum formation. This in turn resulted in increased catalyst deactivation compared to the case of no cyclohexene in the feed. Reactor fouling was shown to be linked to dimer and gum formation, as the pressure drop across the reactor increased with higher dimerization yield and gum formation. The increase in pressure drop was well described by a decreasing average reactor bed voidage caused by cumulative gum deposition within the catalyst bed. An overall trend of increasing gum yield with increasing dimer yield is reported, suggesting that the dimers are precursors for gum formation. In addition, catalyst deactivation was linked to carbon deposition on the catalyst caused by dimer and gum formation; increased dimer and gum formation were accompanied by an increased carbon deposition and decreased BET surface area of the catalyst. A kinetic model of the hydrogenation and dimerization of 4-methylstyrene over spent commercial Ni-Mo-S/γ-Al₂O₃ showed that hydrogenation has much lower activation energy (24.8 kJ/mol) than dimerization (68.2 kJ/mol).
Passively mode locked Raman laser
Creators: name: Liang, W.
name: Ilchenko, V. S.
name: Savchenkov, A. A.
name: Matsko, A. B.
name: Seidel, D.
name: Maleki, L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on the observation of a novel mode locked optical comb generated at the Raman offset (Raman comb) in an optically pumped crystalline whispering gallery mode resonator. Mode locking is confirmed via measurement of the radio-frequency beat note produced by the optical comb on a fast photodiode. Neither the conventional Kerr comb nor hyper-parametric oscillation is observed when the Raman comb is present.
title: Safety in Numbers: Models of Pedestrian and Bicycle Crash Frequency and Severity at Signalized Intersections in Utah Using Innovative Measure of Exposure
Creators: name: Islam, Ahadul
Publisher: name: Utah State University
Year: 2021

description: Recent trends indicate a dramatic increase in both the number and share of pedestrian and bicyclist injuries and fatalities nationally and in many states. This study aimed at understanding (geometric, traffic, operational, and other) factors associated with pedestrian and bicycle safety and also to assist in the prioritization and selection of counter measures to improve pedestrian and bicycle safety at signalized intersections. Several negative binomial models were estimated to investigate factors affecting pedestrian and bicycle crash frequency. The models suggested several characteristics of the road network, land use, built environment, and neighborhood sociodemographics were significantly associated with more (or fewer) pedestrian and bicycle crashes. Ordered logit models were fitted to investigate factors affecting injury severity in pedestrian and bicycle crashes. The model results indicated that vehicle size, vehicle maneuvering direction, and involvement of teenage/older drivers and DUI/drowsy/distracted driving in crashes had significant effects on injury severity in pedestrian and bicycle crashes. The study also found strong support for the “safety in numbers” effect, in which pedestrian/bicycle crash rates decrease with an increase in pedestrian/bicycle volumes.
Noise-assisted Multibit Storage Device
Creators: name: Bellomo, G.
name: Patterson, G. A.
name: Fierens, P. I.
name: Grosz, D. F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: In this paper we extend our investigations on noise-assisted storage devices through the experimental study of a loop composed of a single Schmitt trigger and an element that introduces a finite delay. We show that such a system allows the storage of several bits and does so more efficiently for an intermediate range of noise intensities. Finally, we study the probability of erroneous information retrieval as a function of elapsed time and show a way for predicting device performance independently of the number of stored bits.
description: 5 figures