cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stratified Lie systems: Theory and applications
Creators: name: Cariñena, J. F.
name: de Lucas, J.
name: Wysocki, D.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 34A26, 34A05, 34A34 (primary), 17B66, 22E70 (secondary)

description: A stratified Lie system is a nonautonomous system of first-order ordinary differential equations on a manifold $M$ described by a $t$-dependent vector field $X=\sum_{α=1}^rg_αX_α$, where $X_1,\ldots,X_r$ are vector fields on $M$ spanning an $r$-dimensional Lie algebra that are tangent to the strata of a stratification $\mathcal{F}$ of $M$ while $g_1,\ldots,g_r:\mathbb{R}\times M\rightarrow \mathbb{R}$ are functions depending on $t$ that are constant along integral curves of $X_1,\ldots,X_r$ for each fixed $t$. We analyse the particular solutions of stratified Lie systems and how their properties can be obtained as generalisations of those of Lie systems. We illustrate our results by studying Lax pairs and a class of $t$-dependent Hamiltonian systems. We study stratified Lie systems with compatible geometric structures. In particular, a class of stratified Lie systems on Lie algebras are studied via Poisson structures induced by $r$-matrices.
description: 34 pages. Much improved presentation: many more details in proofs, terminological changes in some definitions, and new applications added
Maratus Karsch 1878
Creators: name: Ott, Ju ̈ rgen C.
name: Hil, David E.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Salticidae
Maratus

description: Genus Maratus Karsch 1878
 Type species Maratus amabilis Karsch 1878
description: Published as part of Ott, Ju ̈ rgen C. & Hil, David E., 2023, Maratus nambung, a new peacock spider from the southwestern corner of Australia (Araneae: Salticidae: Euophryini), pp. 1-29 in Peckhamia 309 (1) on page 3, DOI: 10.5281/zenodo.10270755
Novel 2D representation of vibration for local damage detection
Creators: name: Żak, Grzegorz
name: Obuchowski, Jakub
name: Wyłomańska, Agnieszka
name: Zimroz, Radosław
Publisher: name: Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology
Year: 2014
Subjects: local damage detection, bi-frequency plane, partial autocorrelation function, fault pattern surface

description: Mining Science
Ramification, Structure and Ground
Creators: name: Kiani, Amirhossein
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Metaphysics
subject: Logic
subject: Philosophy

description: This dissertation sets out to explore a deep interconnection between highly structured relational entities, various notions of grounding and ramified typed systems. It is argued that together these three form a powerful alliance that contributes to a unified picture of reality within which a cluster of recent puzzles of ground and grain can be resolved.
¿Vale la pena leer filosofía? incidencia de las asignaturas filosóficas en el desempeño en pruebas estandarizadas para las licenciaturas en filosofía en Colombia
Creators: name: Farieta-Barrera, Alejandro
Publisher: name: Zenodo
Year: 2019
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Teacher education
subject: Critical Readong
subject: Citizenship Education
subject: Higher Education
subject: Educational Policy

description: There’s a worldwide concern about the value and contribution of humanities education, mainly due to the reduction and closure of humanities undergraduate courses and high school subjects, such as philosophy. But, on the other hand, there’s an important concern, especially in Latin America, about teacher quality, concern that has been exacerbated by the results of worldwide standardized tests, specifically for reading ¬—such as PISA test—, mainly because literacy is normally associated with economic growth, and teacher quality with student outcomes in reading. This paper shows evidence in favor of the hypothesis according to which more disciplinary subjects for B. Ed. in philosophy has a significant effect on critical reading and on citizenship competences. The study was conducted with 920 students of all the B.Ed. in philosophy that took “Saber Pro”, National Standardized Test for Colombia, in 2016 and 2017. The outcomes were contrasted, by means of multivariable regression analysis, with the number of credits of philosophical subjects of undergraduate programs, and the results shows that for any additional credit there's an increasing of 0,14 points for critical reading test, and 0,16 points for the citizenship competences test. The conclusion is that teaching philosophy can be a safe path for improve reading and citizenship competences in developing countries.
The mode-coupling glass transition in a fluid confined by a periodic potential
Creators: name: Nandi, Saroj Kumar
name: Bhattacharyya, Sarika Maitra
name: Ramaswamy, Sriram
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that a fluid under strong spatially periodic confinement displays a glass transition within mode-coupling theory (MCT) at a much lower density than the corresponding bulk system. We use fluctuating hydrodynamics, with confinement imposed through a periodic potential whose wavelength plays an important role in our treatment. To make the calculation tractable we implement a detailed calculation in one dimension. Although we do not expect simple 1d fluids to show a glass transition, our results are indicative of the behaviour expected in higher dimensions. In a certain region of parameter space we observe a three-step relaxation reported recently in computer simulations [S.H. Krishnan, PhD thesis, Indian Institute of Science (2005); Kim et al., Eur. Phys. J-ST 189, 135-139 (2010)] and a glass-glass transition. We compare our results to those of Krakoviack, PRE 75, 031503 (2007) and Lang et al., PRL 105, 125701 (2010).
description: This is the published version of the paper, minor modification, few more references added
Admissible restrictions of irreducible representations of reductive Lie groups: symplectic geometry and discrete decomposability
Creators: name: Kobayashi, Toshiyuki
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: Let $G$ be a real reductive Lie group, $L$ a compact subgroup, and $π$ an irreducible admissible representation of $G$. In this article we prove a necessary and sufficient condition for the finiteness of the multiplicities of $L$-types occurring in $π$ based on symplectic techniques. This leads us to a simple proof of the criterion for discrete decomposability of the restriction of unitary representations with respect to noncompact subgroups (the author, Ann. Math. 1998), and also provides a proof of a reverse statement which was announced in [Proc.ICM 2002, Thm.D]. A number of examples are presented in connection with Kostant's convexity theorem and also with non-Riemannian locally symmetric spaces.
description: To the memory of Bertram Kostant
Game theoretical analysis of Kidney Exchange Programs
Creators: name: Carvalho, Margarida
name: Lodi, Andrea
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences
subject: 91-XX, 05Cxx, 90-XX

description: The goal of a kidney exchange program (KEP) is to maximize number of transplants within a pool of incompatible patient-donor pairs by exchanging donors. A KEP can be modelled as a maximum matching problem in a graph. A KEP between incompatible patient-donor from pools of several hospitals, regions or countries has the potential to increase the number of transplants. These entities aim is to maximize the transplant benefit for their patients, which can lead to strategic behaviours. Recently, this was formulated as a non-cooperative two-player game and the game solutions (equilibria) were characterized when the entities objective function is the number of their patients receiving a kidney. In this paper, we generalize these results for $N$-players and discuss the impact in the game solutions when transplant information quality is introduced. Furthermore, the game theory model is analyzed through computational experiments on instances generated through the Canada Kidney Paired Donation Program. These experiments highlighting the importance of using the concept of Nash equilibrium, as well as, the anticipation of the necessity to further research for supporting police makers once measures on transplant quality are available.
Pressure Response During Gas Diffusion in Tight Porous Media
Creators: name: Zhu, Guanying
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Countercurrent Diffusion
subject: Surface Diffusion
subject: Sorption
subject: Cyclic Gas Injection
subject: Engineering--Petroleum

description: In this thesis, the pressure change during countercurrent diffusion in the cyclic gas injection process was investigated. It briefly introduces the situation of climate change and the importance for considering Carbon Capture Utilization and Storage (CCUS) in the application of Enhance Gas Recovery. A real core and two compartments were used to represent the relationship in the system of fractures, porous media, and the gas reservoir. Three kinds of experiments, including single gas flooding in the core system, coupled gases diffusion without core in the system, and the most important one, coupled gases diffusion in different cores were carried out. The experimental system consists of two compartments and one core holder with the core samples in the middle. The initial conditions at the two sides of the core were set as an isobaric, both at around 40 psi (gauge pressure) to eliminate the convection effect and observing the pressure change caused by diffusion solely. Nitrogen, carbon dioxide and methane were used in different combinations to see the binary behavior in Scioto Sandstone and Torrey Sandstone. The general pressure trend for single gas flow in the cores is always decreasing at the very beginning and reaches a plateau due to the unsteady flow in the system. The binary gas behavior in no-core countercurrent diffusion is dominated by the heavier component. The binary gas behavior in the two sandstones is controlled by molecular weight at the beginning stage, but later it combines surface diffusion and sorption, rendering a more complex general behavior. The pore size also plays an important role if the pore diameter is comparable with the mean free path of the gas molecules. The response curve changes by varying the pore diameter and the critical surface area.
Neutrino-deuteron scattering: Uncertainty quantification and new $L_{1,A}$ constraints
Creators: name: Acharya, Bijaya
name: Bacca, Sonia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study neutral- and charged-current (anti)neutrino-induced dissociation of the deuteron at energies from threshold up to 150 MeV by employing potentials, as well as one- and two-body currents, derived in chiral effective field theory ($χ$EFT). We provide uncertainty estimates from $χ$EFT truncations of the electroweak current, dependences on the $χ$EFT cutoff and variations in the pool of fit data used to fix the low-energy constants of $χ$EFT. At 100 MeV of incident (anti)neutrino energy, these uncertainties amount to about 2-3\% and are smaller than the sensitivity of the cross sections to the single-nucleon axial form factor, which amounts to 5\% if one varies the range of the nucleon axial radius within the bands determined by recent lattice quantum chromodynamics evaluations and phenomenological extractions. We conclude that a precise determination of the nucleon axial form factor is required for a high-precision calculation of the neutrino-deuteron cross sections at energies higher than 100 MeV. By matching our low-energy $χ$EFT results to those of pionless effective field theory ($\cancelπ$EFT), we provide new constraints for the counterterm $L_{1,A}$ that parameterizes the strength of the axial two-body current in $\cancelπ$EFT. We obtain a value of $4.9^{+1.9}_{-1.5}\mathrm{fm}^3$ at renormalization scale set to pion mass, which is compatible with, albeit narrower than, previous experimental determinations, and comparable to a recent lattice quantum chromodynamics calculation.
description: Typographical errors fixed and a reference added. Version will appear in Phys. Rev. C
Pedersen Conductance as Measured by Swarm
Creators: name: Pourkarim, Pouya
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Pedersen Conductance
subject: Swarm
subject: Atmospheric Science
subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: We estimate ionospheric Pedersen conductance using measurements from the European Space Agency’s Swarm A satellites of magnetic and electric fields. We provide long-term averages in the form of global maps, and case-by-case results using scatter plots of Pedersen conductance versus solar zenith angle. The long-term results display expected ionospheric features and show agreement with previous studies. However, we find that the case-by-case results display a high variability, and abnormally low Pedersen conductance values. We identify possible sources of the high variability and low magnitude, and we revisit the underlying assumptions conventionally used in such calculations. We find that variation of ionospheric parameters in the zonal direction, and contamination of zonal magnetic field by Hall currents are potentially significantly affecting our conductance estimates. Further, we identify non-quasi-static fields and presence of Alfvén waves as another significant source potentially affecting the results.
Complex Langevin dynamics in the SU(3) spin model at nonzero chemical potential revisited
Creators: name: Aarts, Gert
name: James, Frank A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The three-dimensional SU(3) spin model is an effective Polyakov loop model for QCD at nonzero temperature and density. It suffers from a sign problem at nonzero chemical potential. We revisit this model using complex Langevin dynamics and assess in particular the justification of this approach, using analyticity at small mu^2 and the criteria for correctness developed recently. Finite-stepsize effects are discussed in some detail and a higher-order algorithm is employed to eliminate leading stepsize corrections. Our results strongly indicate that complex Langevin dynamics is reliable in this theory in both phases, including the critical region. This is in sharp contrast to the case of the XY model, where correct results were obtained in only part of the phase diagram.
description: 23 pages, several figures, minor typos corrected, to appear in JHEP
The Virus Resistance Mechanism of Abortive Infection K in Lactococcus lactis
Creators: name: Du, Amy
Publisher: name: Science
Year: 2023
Subjects: subject: Bacteriophage
subject: Defense Mechanism
subject: Abortive Infection
subject: Lactococcus lactis
subject: Microbiology
subject: FOS: Biological sciences
subject: Virology
subject: Biochemistry
subject: Biology--Molecular

description: In nature, there is a constant battle between viruses and their hosts known as the evolutionary arms race, where they both continuously evolve to attempt to gain an advantage over the other. This evolutionary arms race has resulted in many mechanistic inventions, such as abortive infection (Abi) mechanisms in bacteria. In Abi mechanisms, viruses inject their genetic material into cells, but bacteria block phage replication by preventing one of the steps of phage maturation, typically resulting in cell death. This study looks at the Abi mechanism called AbiK, which is controlled by a protein of the same name that was discovered on a plasmid in Lactococcus lactis. A large portion of the study focuses on what happens in vivo during the AbiK mechanism. The normal wild-type infection, the abortive infection mediated by the AbiK protein, and the escape of the AbiK mechanism by a mutant phage are all studied for comparative analyses. Observations have shown that phage DNA replication is inhibited, and that transcription of the phage genes is delayed during the AbiK mechanism. The mutant phage can bypass these inhibitions, and successfully replicate its DNA and complete the phage lytic cycle. RNA-Sequencing experiments were conducted to narrow down the mechanism behind AbiK, and preliminary results indicate that AbiK depletes the nucleotide resources available in the cell, eventually resulting in cell death and inhibition of the phage replication cycle. A second part of this study focuses on the biochemistry of the AbiK protein. The AbiK protein has a polymerase activity that polymerizes an untemplated long single-stranded DNA that is covalently attached to the AbiK protein. This study identified which amino acid is used as a primer, which is tyrosine 44 on the AbiK protein. The release of protein structure prediction databases allowed for the analysis of a generated model of the AbiK protein, allowing for the elucidation of other biochemical functions the AbiK protein has. In addition to the polymerization activity, AbiK is hypothesized to bind to nucleotides or other proteins. The culmination of these studies allowed for insight on the AbiK mechanism, generating a hypothesis for future studies.
Additional file 1 of A transcription factor DAF-5 functions in Haemonchus contortus development
Creators: name: Di, Wenda
name: Li, Fangfang
name: He, Li
name: Wang, Chunqun
name: Zhou, Caixian
name: Liu, Lu
name: Ye, Lisa
name: Chen, Jian
name: Hu, Min
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Table S1. PCR Primers used in the present study. Table S2. Sequences of DAF-5 homologues used for alignment and phylogenetic analyses. Table S3. Sequences of Hc-daf-5-specific siRNA and control siRNA used in RNAi.
On the B to D* tau nu Sensitivity to New Physics
Creators: name: Fajfer, Svjetlana
name: Kamenik, Jernej F.
name: Nisandzic, Ivan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: B physics has played a prominent role in investigations of new physics effects at low-energies. Presently, the largest discrepancy between a standard model prediction and experimental measurements appears in the branching ratio of the charged current mediated B to tau nu decay, where the large tau mass lifts the helicity suppression arising in leptonic B decays. Less significant systematic deviations are also observed in the semileptonic B to D(*) tau nu rates. Due to the rich spin structure of the final state, the decay mode B to D* tau nu offers a number of tests of such possible standard model deviations. We investigate the most general set of lowest dimensional effective operators leading to helicity suppressed modifications of b to c (semi)leptonic transitions. We explore such contributions to the B to D* tau nu decay amplitudes by determining the differential decay rate, longitudinal D* polarization fraction, D* - tau opening angle asymmetry and the tau helicity asymmetry. We identify the size of possible new physics contributions constrained by the present B to D(*) tau nu rate measurements and find significant modifications are still possible in all of them. In particular, the opening angle asymmetry can be shifted by almost 30%, relative to the standard model prediction, while the tau helicity asymmetry can still deviate by as much as 80%.
description: 10 pages, 4 figures; corrected several typos, added references, conclusions unchanged
Thermo-Electro-Optical Properties of Disordered Nanowire Networks
Creators: name: Esteki, Koorosh
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Physics

description: Metallic nanowire networks are promising candidates for next-generation transparent conductors, owing to their exceptional electrical and thermal conductivity, high optical transparency, and mechanical flexibility. A nanowire network is a disordered arrangement of nanowires that exhibits no discernible long-range order or periodicity. Previous studies have placed significant emphasis on the individual analysis of electrical resistance, optical transmission, and thermal conduction in diverse network materials. Nonetheless, insufficient focus has been devoted to comprehending the relationship between the multiple extrinsic and intrinsic variables that characterize a disordered nanowire network (or an ensemble of them) and the trade-offs that arise when investigating the system response trio of namely electrical/ optical/thermal natures. This thesis presents a comprehensive computational study that exclusively employs theoretical and numerical models to examine the thermoelectric and optical characteristics of two types of disordered metallic nanowire networks: (i) junction-based random nanowire networks and (ii) seamless random nanowire networks. The raw materials that compose their nanowires are metals namely, silver, gold, copper, and aluminium and we used a variety of computational tools to obtain prominent physical quantities that infer the network’s performance such as sheet (electrical) resistance, optical transmission, and temperature variation. A range of adjustable parameters, including those pertaining to geometrical structure in device design, have been systematically tuned in order to conduct a figure of merit analysis with respect to thermal and electrical conduction, and optical transmission of the network materials. Moreover, we obtained local current and temperature mappings that detail the conduction mechanisms used by the networks to propagate signals through their disordered skeleton. We verified that, under certain conditions, junction-based and seamless nanowire networks fall into the same temperature distribution mechanisms that can be generally described with Weibull probability density functions. This study offers valuable insights into the electrical/optical/thermal performance of disordered nanowire networks prone to transparent conductor applications.
FZZT Brane Relations in the Presence of Boundary Magnetic Fields
Creators: name: Atkin, Max R.
name: Zohren, Stefan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We show how a boundary state different from the (1,1) Cardy state may be realised in the (m,m+1) minimal string by the introduction of an auxiliary matrix into the standard two hermitian matrix model. This boundary is a natural generalisation of the free spin boundary state in the Ising model. The resolvent for the auxiliary matrix is computed using an extension of the saddle-point method of Zinn-Justin to the case of non-identical potentials. The structure of the saddle-point equations result in a Seiberg-Shih like relation between the boundary states which is valid away from the continuum limit, in addition to an expression for the spectral curve of the free spin boundary state. We then show how the technique may be used to analyse boundary states corresponding to a boundary magnetic field, thereby allowing us to generalise the work of Carroll et al. on the boundary renormalisation flow of the Ising model, to any (m,m+1) model.
description: 23 pages, 5 figures (3 new). Two new sections added giving examples of the construction. Explanations clarified. Minor changes to the conclusion but main results unchanged. Matches published version
Additional file 1: of Molecular characterization of invasive meningococcal isolates in Burkina Faso as the relative importance of serogroups X and W increases, 2008–2012
Creators: name: Retchless, Adam
name: Congo-Ouédraogo, Malika
name: Kambiré, Dinanibè
name: Vuong, Jeni
name: Chen, Alex
name: Hu, Fang
name: Ba, Absetou
name: Ouédraogo, Abdoul-Salam
name: Hema-Ouangraoua, Soumeya
name: Patel, Jaymin
name: Traoré, Rasmata
name: Sangaré, Lassana
name: Wang, Xin
Publisher: name: figshare
Year: 2018
Subjects: subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Computational Biology

description: (PDF) Unrooted phylogeny of international NmW CC11 isolates. The 128 isolates from this study are identified by black squares, the Hajj-related outbreak isolate is identified by a black star, and the remaining 470 isolates are identified according to the categories defined by from Lucidarme et al. [23]. Arrows mark isolates that are not in the same category as the most closely related isolates: the Hajj-related outbreak isolate (M07149) and an “Anglo/French Hajj strain” isolate collected in France during 2014 (M14 240,446). The tree is scaled by the number of parsimonious substitutions per branch, identified by kSNP3. Branches with bootstrap support < 70% have been deleted. (PDF 33 kb)
Economic Policy Uncertainty, Firms Behavior and Trade
Creators: name: Fosu, Felix Atta
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Policy Uncertainty
subject: Investment
subject: Trade
subject: Education--Social Sciences

description: Economic policy uncertainty has increased sharply, especially following the 2008 financial crisis. Policy uncertainty arises from a lack of clarity and predictability about the future course of policies. Consequently, a forum has emerged to identify and discuss its potential effect on economic activities. My thesis offers insights into some of these critical issues, including the significance of the impact of policy uncertainty on trade and investment, the relative impact of policy uncertainty on within-firm and between-firm trade. Also, it identifies the features of industries which amplify the investment effects of policy uncertainty, as well as the institutional mechanisms that can mitigate these effects. Contributing to these policy-relevant discussion expands the usefulness of my research beyond the academic circles to policy making fronts. The general insight from my research is that rising policy uncertainty will not only reduce the volume of trade but alter the organizational structure of multinational firms and hence, how trade is organized. Moreover, industries with competitive input markets and sunk investment costs respond significantly to changes in policy uncertainty. Further, my research maintains that international dispute resolution mechanisms such as the WTO can significantly reduce or eliminate some of the adverse effects of policy uncertainty on economic activities. First, I examine how policy uncertainty affects the organizational structure of multinational firms and the organization of trade. Using US industry data and the difference-in-differences method, I find that higher policy uncertainty reduces the share of trade that occurs between-firm. Second, I test a conjecture that the effect of policy uncertainty on within firm trade and between firm trade increases in the thickness of industry's input market. Using US industry-level trade data and difference-in-difference technique, I find that the differential effect of policy uncertainty increases in the thickness of the input market. Third, I consider the WTO, Free Trade Agreements and Diplomatic Exchanges as international dispute resolution mechanisms and examine their impacts on trade between country pairs that have a history of war. Using bilateral trade flow data, I find that international dispute resolution mechanisms can significantly to the trade growth among nations with a history of war.
Mapping the Practice of Site Layout Planning in the Construction Industry
Creators: name: Marcano Pina, Agnei Victoria
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: site layout planning
subject: construction industry
subject: planning tools
subject: Engineering--Civil

description: Site Layout Planning (SLP) is a key activity for construction management and the overall success of construction projects. Past studies in this field have approached multiple techniques to solve SLP as a decision-making optimization problem. However, construction practitioners in the industry typically use intangible or subjective methods to plan the site layout, with the support of multiple tools that are not directly designed for planning construction sites. The mismatch between the available developments from research and actual methods approached in practice directed to the exploration of the practice of SLP conducted by practitioners to define the requirements needed in an SLP tool. Semi-structured interviews were conducted among forty-seven highly experienced construction practitioners who self-identified as fully responsible of SLP activities. Constructivist grounded theory and content analysis were used as the methodological basis to collect and analyze the data. From the analysis of 18635 transcript lines, 5028 codes were obtained, resulting in 190 labels, 60 categories, and 5 themes. The emergent themes describe the components of SLP as site characteristics, purpose, decision-making variables, tools and technology, and planning perspectives. The first part of the results details the practice of SLP, and the considerations and approaches taken by SLP practitioners when conducting a SLP, where the focus is to produce a functional site layout in the early stages of the project. The final part of the results presents the tools and functionalities that practitioners currently use to plan a site layout and highlights the need to integrate these functions and requirements into a single tool that can be practical for the construction industry. The requirements include resource properties and pairwise spatial relationships, planning documents and regulations, layout assessment metrics, and tool modules that facilitate addressing every stage of the planning as identified in the first part of the results. Finally, the aim of this study was to present a guideline for future developments in SLP to ensure their implementation in practical settings. This guideline was designed through the exploration of processes, needs, and requirements of the final users.
Stand structure classification, succession, and mapping using LiDAR
Creators: name: Moss, Ian
Publisher: name: University of British Columbia
Year: 2012

description: In this dissertation, a consistent, reasonably precise, verifiable system of stand structure classification was developed and demonstrated. The goal was to provide a foundation for better communication amongst forest management professionals. A novel distance metric and classification algorithm were introduced. The distance metric was based on similarity in reversed cumulative stems and basal area per ha by diameter (DBH; 1.3 m above ground). This distance metric: (1) uses commonly available information; (2) avoids the separation of data into arbitrary DBH classes; and (3) represents a broad range of simple to complex stand structures. Using 421 plots established across a range of Interior Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) and lodgepole pine (Pinus contorta var. latifolia (Engelm.) Critchfield) stands in the Cariboo region of British Columbia, Canada, a 17-class system of classification was constructed. Whole stand statistics, cumulative distributions, and stand structure/distribution indices were used to evaluate the results. The classes were reasonably precise, with meaningful partitions separating single layered versus complex stands. The utility of the classification system was investigated for diagnosing potential patterns of succession. Over 100 simulated stand structure progressions were simulated using plot data input into an individual-tree growth model. Similar progressions in stand structure classes were assigned common pathways. Four general patterns of succession were observed: (1) a high density single layered pathway; (2) a moderate density single layered pathway; (3) a moderate density complex pathway; and (4) a moderate density, mixed complex-single layered pathway. Lastly, the feasibility of using aerial Light Detection and Ranging (LiDAR) for stand structure classification in forest inventory was assessed. LiDAR was reasonably effective in distinguishing structural classes on the basis of cumulative distributions in basal area or gross volume with respect to DBH, but it was less successful when the distributions in numbers of stems per ha were included. Further study using additional LiDAR metrics beyond those used in this study are needed to improve the use of LiDAR for stand structure classification. This stand structure classification system has potential for a wide variety of forest management applications, including improvement of linkages between strategic and tactical planning and implementation.
Analytical study on holographic superconductors with backreactions
Creators: name: Pan, Qiyuan
name: Jing, Jiliang
name: Wang, Bin
name: Chen, Songbai
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We employ the variational method for the Sturm-Liouville eigenvalue problem to analytically investigate the properties of the holographic superconductors. We find that the analytic method is still powerful when the backreaction is turned on. Reducing step size in the iterative procedure, we observe that the consistency of results between the analytic and numerical computations can be further improved. The obtained analytic result can be used to back up the numerical computations in the holographic superconductor in the fully backreacted spacetime.
description: 10 pages, accepted by JHEP
Segmentation and Optimal Region Selection of Physiological Signals using Deep Neural Networks and Combinatorial Optimization
Creators: name: Oliveira, Jorge
name: Carvalho, Margarida
name: Nogueira, Diogo Marcelo
name: Coimbra, Miguel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Physiological signals, such as the electrocardiogram and the phonocardiogram are very often corrupted by noisy sources. Usually, artificial intelligent algorithms analyze the signal regardless of its quality. On the other hand, physicians use a completely orthogonal strategy. They do not assess the entire recording, instead they search for a segment where the fundamental and abnormal waves are easily detected, and only then a prognostic is attempted. Inspired by this fact, a new algorithm that automatically selects an optimal segment for a post-processing stage, according to a criteria defined by the user is proposed. In the process, a Neural Network is used to compute the output state probability distribution for each sample. Using the aforementioned quantities, a graph is designed, whereas state transition constraints are physically imposed into the graph and a set of constraints are used to retrieve a subset of the recording that maximizes the likelihood function, proposed by the user. The developed framework is tested and validated in two applications. In both cases, the system performance is boosted significantly, e.g in heart sound segmentation, sensitivity increases 2.4% when compared to the standard approaches in the literature.
COX-talk: Communication between TRPV4 channels and prostanoids in lymphatic vessel contractile response to flow.
Creators: name: Brothers, Peter
Publisher: name: Science
Year: 2023
Subjects: subject: Lymphatic
subject: Pharmacology
subject: Physiology
subject: FOS: Biological sciences
subject: Vascular function
subject: Physiology
subject: Pharmacology

description: The proper phasic contractility of collecting lymphatic vessels (CLVs) is critical for lymph propulsion, and it requires a tight communication between the lymphatic endothelium and surrounding smooth muscle. CLVs can sense mechanical stimuli such as pressure and shear stress generated by luminal lymph flow, which modulates their contractile function through the production of vasoactive molecules, including nitric oxide and prostanoids. Although shear stress is a vital regulator of CLV contractility, the mechanisms involved in shear sensing and the role of prostanoids in lymphatic contractile motion are not well understood. In this study, we aimed to investigate the role of the mechanosensor-transient receptor potential vanilloid 4 (TRPV4) in the crosstalk between endothelium and smooth muscle prostanoids in lymphatic vessels. Using pressure myography, we assessed the ability of rat mesenteric CLVs to respond to induced unidirectional flow by increasing the pressure gradients (1, 5, and 9 cm H2O) across the vessel. We determined the involvement of TRPV4 and cyclooxygenase (COX) through selective pharmacological inhibition of TRPV4 with GSK2193874 (GSK219), COX-1 with SC560, and COX-2 with NS398. Our data indicate that high lymph flow reduces the CLV contraction frequency in a time dependent manner. Dilatory mechanisms in response to flow are endothelial, TRPV4 channel, and COX-1-dependent. Furthermore, we found that the production of thromboxane prostanoid (TP) receptor agonists are responsible for the restoration of contraction frequency over time. Selective inhibition of the TP receptor with SQ-29,458 successfully maintains a flow-dependent contractile frequency loss in CLVs. Our findings demonstrate the expression of functional TRPV4 channels in rat mesenteric CLVs. We show that the activation of TRPV4 channels in the lymphatic endothelium induces the production of both dilatory and contractile prostanoids to regulate lymphatic pumping in response to flow. These results provide new insights into the complex regulatory mechanisms involved in the shear sensing and prostanoid-mediated crosstalk between the lymphatic endothelium and smooth muscle. Understanding the regulation of lymphatic contractility is essential for the development of therapies for lymphatic-related diseases, such as lymphedema and cancer metastasis.
On the Inhibition of COVID-19 Protease by Indian Herbal Plants: An In Silico Investigation
Creators: name: Srivastava, Ambrish Kumar
name: Kumar, Abhishek
name: Misra, Neeraj
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: COVID-19 has quickly spread across the globe, becoming a pandemic. This disease has a variable impact in different countries depending on their cultural norms, mitigation efforts and health infrastructure. In India, a majority of people rely upon traditional Indian medicine to treat human maladies due to less-cost, easier availability and without any side-effect. These medicines are made by herbal plants. This study aims to assess the Indian herbal plants in the pursuit of potential COVID-19 inhibitors using in silico approaches. We have considered 18 extracted compounds of 11 different species of these plants. Our calculated lipophilicity, aqueous solubility and binding affinity of the extracted compounds suggest that the inhibition potentials in the order; harsingar > aloe vera > giloy > turmeric > neem > ashwagandha > red onion > tulsi > cannabis > black pepper. On comparing the binding affinity with hydroxychloroquine, we note that the inhibition potentials of the extracts of harsingar, aloe vera and giloy are very promising. Therefore, we believe that these findings will open further possibilities and accelerate the works towards finding an antidote for this malady.
Investigating the virulence of Treponema phagedenis strains isolated from digital dermatitis lesions in a murine abscess model
Creators: name: Scott, Colton
Publisher: name: Veterinary Medicine
Year: 2023
Subjects: subject: Veterinary Science
subject: Microbiology
subject: FOS: Biological sciences

description: Digital Dermatitis (DD) is an ulcerative foot lesion in the heel bulbs of dairy cattle. DD is a polymicrobial disease with no precise etiology, although key pathogenic genera have been consistently found disproportional and abundant in diseased tissue as opposed to healthy skin. One such genera is Treponema, a member genus of the phylum Spirochaetes. Within Treponema, many different phylotypes are found in DD, however the species Treponema phagedenis is uniformly found in copious quantities and deep within the skin layers in the active, ulcerative stages of disease. The pathogenic mechanisms these bacteria use to persist in the skin and the role they play in the larger pathology of DD is widely unknown. To explore the pathogenesis and virulence of Treponema phagedenis, isolates of this species were investigated in a subcutaneous murine abscess model. For this purpose, mice were subcutaneously inoculated with T. phagedenis in two infection trials. In the first trial, a dosage study was conducted to elucidate the pathogenicity of strains across three different spirochete per inoculum (SPI) doses, based on abscess volumes. In the second trial, isolates were inoculated with the dose of 5 x 109 SPI selected based on trial 1 results, to determine the expression level of 11 putative virulence genes and gain insight into the virulence of strains. To do this, abscesses were harvested for RNA extraction followed by RT-qPCR. From the RT-qPCR assay, the relative fold change of these genes was surmised by comparing the expression levels of in vitro culture samples against in vivo murine samples. During this analysis, it was determined that genes encoding for two metal-ion import lipoproteins, were found highly upregulated during infection. In addition, two genes involved in the adherence of treponemes to the host were found moderately expressed versus the in vitro samples. Conversely, two genes involved in motility and chemotaxis were found to not be significantly upregulated or utilized during infection. This gene expression analysis highlights the preference in strategy for T. phagedenis to persist and adhere in the host rather than engage motility and disseminate.
O'ZBEKISTON IQTISODIYOTIDA GSP+ TIZIMINING O'RNI
Creators: name: Zakirova, Sayyora
name: Nizomiddinova, Mashhura
Publisher: name: Zenodo
Year: 2023

description: Barchamizga ma'lumki, iqtisodiyot har bir mamlakat rivojida muhim o'rin tutadigan soha hisoblanadi va shunga ko'ra davlatlar darajasi belgilanadi. Mamlakatimizda ham bu sohaga so'nggi yillarda katta e'tibor qaratilmoqda. Xususan, ko'plab mamlakatlar bilan  savdo-iqtisodiy aloqalar o'rnatilishi, iqtisodiyotni rivojlantirishdagi islohotlar, JSTga a'zo bo'lish uchun ishchi guruh faoliyatining qayta tiklanishi shular jumlasidandir. Yana bir muhim omil sifatida mamlakatimizning Yevropa Ittifoqining GSP+ dasturiga a'zoligini keltirib o'tishimiz mumkin. Ushbu tezisda O'zbekiston iqtisodiyotining rivojlanishida GSP+ ning ahamiyati o'rganib chiqiladi va so'ngida xulosalar beriladi.
Multiscale non-adiabatic dynamics with radiative decay, case study on the post-ionization fragmentation of rare-gas tetramers
Creators: name: Janeček, Ivan
name: Janča, Tomáš
name: Naar, Pavel
name: Renard, Frederic
name: Kalus, René
name: Gadéa, Florent X.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: J.2
subject: 82-08

description: In this supplementary material, we recollect, for reader's convenience, the general scheme of suggested multiscale model (Sec. 1), and basic informations about approaches used for pilot study: a detailed description of the interaction model (Sec. 2) and dynamical methods used for the dark dynamics step (Sec. 3) reported previously in two preceding studies [1, 2]. In addition, a detailed description of the treatment of radiative processes is also given (Sec. 4).
description: supplementary material for parent paper; 9 pages, 1 figure; corrected formulae and misleading notation in Sec.4 (pages 7 and 8)
Energy Shaping Control of a CyberOctopus Soft Arm
Creators: name: Chang, Heng-Sheng
name: Halder, Udit
name: Shih, Chia-Hsien
name: Tekinalp, Arman
name: Parthasarathy, Tejaswin
name: Gribkova, Ekaterina
name: Chowdhary, Girish
name: Gillette, Rhanor
name: Gazzola, Mattia
name: Mehta, Prashant G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper entails application of the energy shaping methodology to control a flexible, elastic Cosserat rod model. Recent interest in such continuum models stems from applications in soft robotics, and from the growing recognition of the role of mechanics and embodiment in biological control strategies: octopuses are often regarded as iconic examples of this interplay. Here, the dynamics of the Cosserat rod, modeling a single octopus arm, are treated as a Hamiltonian system and the internal muscle actuators are modeled as distributed forces and couples. The proposed energy shaping control design procedure involves two steps: (1) a potential energy is designed such that its minimizer is the desired equilibrium configuration; (2) an energy shaping control law is implemented to reach the desired equilibrium. By interpreting the controlled Hamiltonian as a Lyapunov function, asymptotic stability of the equilibrium configuration is deduced. The energy shaping control law is shown to require only the deformations of the equilibrium configuration. A forward-backward algorithm is proposed to compute these deformations in an online iterative manner. The overall control design methodology is implemented and demonstrated in a dynamic simulation environment. Results of several bio-inspired numerical experiments involving the control of octopus arms are reported.
Large Deviation Principles via Spherical Integrals
Creators: name: Belinschi, Serban
name: Guionnet, Alice
name: Huang, Jiaoyang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60B20, 60F10

description: In this article, we develop a framework to study the large deviation principle for matrix models and their quantized versions, by tilting the measures using the limits of spherical integrals obtained in [46,47]. As examples, we obtain 1. a large deviation principle for the empirical distribution of the diagonal entries of $UB_NU^*$, for a sequence of $N\times N$ diagonal matrices $B_N$ and unitary Haar distributed matrices $U$; 2. a large deviation upper bound for the empirical eigenvalue distribution of $A_N+UB_NU^*$, for two sequences of $N\times N$ diagonal matrices $A_N, B_N$, and their complementary lower bounds at measures which are described by the free product with amalgamation; 3. a large deviation principle for the Kostka number $K_{\boldsymbolλ_N \boldsymbolη_N}$, for two sequences of partitions $\boldsymbolλ_N, \boldsymbolη_N$ with at most $N$ rows; 4. a large deviation upper bound for the Littlewood-Richardson coefficients $c_{\boldsymbolλ_N \boldsymbol η_N}^{\boldsymbol κ_N}$, for three sequences of partitions $\boldsymbolλ_N, \boldsymbol η_N, \boldsymbol κ_N$ with at most $N$ rows, and their complementary lower bounds at nice measures.
description: 70 pages, journal version