cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ANALYSIS OF THE EDUCATIONAL PROCESS AND CURRENT PROGRAMS FROM THE POINT OF VIEW OF THE USE OF MODERN EDUCATIONAL TECHNOLOGIES IN TEACHING THE SUBJECT OF THE UZBEK LANGUAGE IN THE FIELD
Creators: name: Oʻrinboyeva Xurshida Xayrullayevna
Publisher: name: Zenodo
Year: 2024

description: The integration of modern educational technologies into the teaching of the Uzbek language has become an essential factor in enhancing the learning process, particularly in specialized fields. This article analyzes the current educational programs and methodologies used in teaching the Uzbek language in various professional contexts, focusing on the effectiveness of digital tools, multimedia resources, and interactive learning platforms. The study also evaluates how these technologies impact language acquisition, student engagement, and overall learning outcomes. Through an examination of case studies and recent developments in educational technologies, this paper highlights key trends, challenges, and future opportunities for improving the teaching of the Uzbek language in professional fields.
Real-time Measurement of Stress and Damage Evolution During Initial Lithiation of Crystalline Silicon
Creators: name: Chon, Michael J.
name: Sethuraman, Vijay A.
name: McCormick, Anthony
name: Srinivasan, Venkat
name: Guduru, Pradeep R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Crystalline to amorphous phase transformation during initial lithiation in (100) silicon-wafers is studied in an electrochemical cell with lithium metal as the counter and reference electrode. It is demonstrated that severe stress jumps across the phase boundary lead to fracture and damage, which is an essential consideration in designing silicon based anodes for lithium ion batteries. During initial lithiation, a moving phase boundary advances into the wafer starting from the surface facing the lithium electrode, transforming crystalline silicon into amorphous LixSi. The resulting biaxial compressive stress in the amorphous layer is measured in situ and it was observed to be ca. 0.5 GPa. HRTEM images reveal that the crystalline-amorphous phase boundary is very sharp, with a thickness of ~ 1 nm. Upon delithiation, the stress rapidly reverses, becomes tensile and the amorphous layer begins to deform plastically at around 0.5 GPa. With continued delithiation, the yield stress increases in magnitude, culminating in sudden fracture of the amorphous layer into micro-fragments and the cracks extend into the underlying crystalline silicon.
description: 12 pages, 5 figures
WG1_ND1_Short Scientific summary of SAGAs relevance
Creators: name: Wilson, Clare
Publisher: name: Zenodo
Year: 2020
Subjects: COST Action SAGA (CA17131)
near-surface geophysics
archaeology
soil science
archaeological prospection
archaeo-geophysics
geoscience
geoarchaeology
applied geophysics

description: A short scientific summary outlining the wider relevance of SAGA's work in the context of Cultural Heritage Management (CHM) and the CHM regulatory landscape. The aim is to produce a statement for the SAGA website and that can be worked into future SAGA grant applications to highlight the importance and relevance of the work.
Energy and Quality of Service Aware Communication Schemes for Body Area Networks
Creators: name: Egbogah, Emeka
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Electronics and Electrical
subject: body area networks

description: The emergence of body area networks (BANs) has garnered interest from the military where body-to-body networks (BBNs) can be employed to facilitate the remote monitoring of soldiers’ physiological state, thus preventing unnecessary fatalities. The wireless transmission of physiological data from soldiers to combat medic presents a challenging problem not fully addressed in the literature. The challenge arises from the need to not only manage the limited energy supply of battery-powered devices comprising the BAN, but to overcome deleterious path loss and fading induced on-body and body-to-body wireless channel conditions while also supporting stringent quality of service (QoS) requirements. In this thesis, energy and QoS aware communication schemes were designed to solve the aforementioned problem. The combination of a BAN-centric adaptive transmission scheme (ATS) and multi-constrained power allocation (MPA) strategy was shown to enhance intra-BAN and inter-BAN transmission link performance. Incorporating ATS and MPA into the BANs of a platoon sized multi-hop BBN, the optimal solution for the minimum energy required to transmit physiological data under reliability and delay constraints was derived. The solution, however, was found to be highly complex and computationally inefficient. Therefore, an energy and QoS aware cross-layer (EQX) communication scheme integrating a constrained routing algorithm at the network layer, interference aware scheduling at the medium access control layer, and multi-constrained power allocation at the physical layer, was designed. EQX was shown to achieve near-optimal performance with polynomial complexity. To support the fully distributed operation of BANs in the multi-hop BBN, an energy and QoS aware distributed (EQD) communication scheme integrating analog network coded cooperative communication at the BAN level and a multi-receive policy at the BBN level was designed and shown to improve performance. The EQX and EQD communication schemes developed in this thesis offer valid and useful solutions towards the problem of supporting remote monitoring of soldiers’ physiological state in military environments. They provide, as this thesis demonstrates, clear performance benefits in terms of network coverage, energy consumption, reliability, and delay and are thus recommended for implementation in future BANs.
Light Dark Matter and the Electroweak Phase Transition in the NMSSM
Creators: name: Carena, Marcela
name: Shah, Nausheen R.
name: Wagner, Carlos E. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the stability of the vacuum and the electroweak phase transition in the NMSSM close to the Peccei-Quinn symmetry limit. This limit contains light Dark Matter (DM) particles with a mass significantly smaller than the weak scale and also light CP-even and CP-odd Higgs bosons. Such light particles lead to a consistent relic density and facilitate a large spin-independent direct DM detection cross section, that may accommodate the recently reported signatures at the DAMA and CoGeNT experiments. Studying the one-loop effective potential at finite temperature, we show that when the lightest CP-even Higgs mass is of the order of a few GeV, the electroweak phase transition tends to become first order and strong. The inverse relationship between the direct-detection cross-section and the lightest CP-even Higgs mass implies that a cross-section of the order of 10$^{-41}$ cm$^2$ is correlated with a strong first order phase transition.
description: 28 Pages, 15 figures
Microclimate During Beef Cattle Transport: Effects of Transportation Management and Relationship to Indicators of Animal Welfare
Creators: name: Goldhawk, Christy
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Agriculture
subject: Veterinary Science
subject: Engineering--Agricultural
subject: cattle
subject: animal welfare
subject: transportation

description: The consequences of transportation on cattle welfare have become focal areas of concern within North America. However, there is an absence of empirical evidence to inform decisions and risk management under commercial conditions. The objective of this thesis was to evaluate a system for monitoring in-transit microclimate within commercial transport trailers, and subsequently assess the relationships between transportation management factors, such as space allowance and location within trailer, microclimate during commercial transport, and indicators of cattle welfare for three target populations in the beef industry; calves, feeders, and cull cows. Twenty-four loads of calves, 19 loads of feeders, and 17 loads of cull cows were used for data collection, all under commercial conditions within North America. A logger layout of 10 loggers distributed at the ceiling-level was deemed most appropriate for research applications due to consistency of performance with different cattle weights and space allowances in two compartments used to transport the majority of cattle in North America. Single logger layouts were an economical alternative if ambient conditions were considered. Predictive equations are presented that can serve as estimates of correction factors when using ambient temperature and humidity as proxy for animal-level conditions during transportation. Hazard assessment provided quantification of trailer microclimate during commercial cattle transport for the target populations. Space allowance and location within trailers did not have a consistent effect on the in-transit microclimate. However, in accordance with previously published reports on vehicle design, vehicle speed and ambient conditions were associated with trailer microclimate in each study. Additionally, evidence was presented that refutes the hypothesis that the use of boarding in the winter negatively influences ventilation during transport, although stationary periods remain of concern. The majority of indicators of cattle welfare support the inference that the effect of in-transit temperature on indicators of cattle welfare is dependent on the temperature acclimatization of cattle prior to transport, and physiological indicators were all within the ranges expected for healthy cattle. The results of the three studies presented herein appear to support that, relative to the indicators of cattle welfare evaluated, the space allowances used by the North American beef industry are not detrimental to cattle welfare or meat quality.
Intrinsic Terahertz Plasmons and Magnetoplasmons in Large Scale Monolayer Graphene
Creators: name: Crassee, I.
name: Orlita, M.
name: Potemski, M.
name: Walter, A. L.
name: Ostler, M.
name: Seyller, Th.
name: Gaponenko, I.
name: Chen, J.
name: Kuzmenko, A. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that in graphene epitaxially grown on SiC the Drude absorption is transformed into a strong terahertz plasmonic peak due to natural nanoscale inhomogeneities, such as substrate terraces and wrinkles. The excitation of the plasmon modifies dramatically the magneto-optical response and in particular the Faraday rotation. This makes graphene a unique playground for plasmon-controlled magneto-optical phenomena thanks to a cyclotron mass 2 orders of magnitude smaller than in conventional plasmonic materials such as noble metals.
description: to appear in Nano Letters
The use of natural genetic variation in Caenorhabditis elegans to identify novel polymorphisms that can confer benzimidazole resistance in nematodes
Creators: name: Latheef, Sharmilah Luthfia Jezmine
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Benzimidazole resistance
subject: Tubulin
subject: Mutations
subject: Genetic variation
subject: C.elegans

description: Benzimidazoles are important drugs for parasite control. Benzimidazole resistance is widespread in parasites of domestic animals, and an emerging problem in human parasites. Caenorhabditis elegans is a powerful model system to study biology of drug resistance. Using natural genetic variation in wild populations of the non-parasitic nematode C. elegans, three novel amino acid substitutions and a deletion in the β-tubulin drug target have been identified that confer varying levels of benzimidazole resistance. These residues are different to those previously reported in other organisms including nematode parasites or fungi and provide new candidate polymorphisms to be investigated in parasitic nematode species including human parasites where resistance is poorly understood. They may also represent new residues important for drug binding. In addition, presence of these resistance conferring polymorphisms in wild populations of a free-living nematode may indicate benzimidazole drug residues in the environment having a significant impact on natural fauna. Finally, the presence of null ben-1 β-tubulin alleles in wild C. elegans populations indicates the functional redundancy of this gene in nature.
Convergence of quantum random walks with decoherence
Creators: name: Fan, Shimao
name: Feng, Zhiyong
name: Xiong, Sheng
name: Yang, Wei-Shih
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper, we study the discrete-time quantum random walks on a line subject to decoherence. The convergence of the rescaled position probability distribution $p(x,t)$ depends mainly on the spectrum of the superoperator $\mathcal{L}_{kk}$. We show that if 1 is an eigenvalue of the superoperator with multiplicity one and there is no other eigenvalue whose modulus equals to 1, then $\hat {P}(\fracν {\sqrt t},t)$ converges to a convex combination of normal distributions. In terms of position space, the rescaled probability mass function $p_t (x, t) \equiv p(\sqrt t x, t)$, $ x \in Z/\sqrt t$, converges in distribution to a continuous convex combination of normal distributions. We give an necessary and sufficient condition for a U(2) decoherent quantum walk that satisfies the eigenvalue conditions. We also give a complete description of the behavior of quantum walks whose eigenvalues do not satisfy these assumptions. Specific examples such as the Hadamard walk, walks under real and complex rotations are illustrated. For the O(2) quantum random walks, an explicit formula is provided for the scaling limit of $p(x,t)$ and their moments. We also obtain exact critical exponents for their moments at the critical point and show universality classes with respect to these critical exponents.
First-principles study of the magnetic anisotropy of ultrathin B-, C-, and N-doped FeCo films
Creators: name: Marciniak, Joanna
name: Werwiński, Mirosław
name: Rychły-Gruszecka, Justyna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Iron-based layered systems are of great interest because of their ability to tune effective material parameters such as magnetic anisotropy energy (MAE). The influence of the crystallographic structure of Fe, its thickness, and the presence of other layers above and below the Fe layer on magnetic parameters, such as the MAE of the studied system, is an intriguing and important topic from an application point of view. Here, we present a density functional theory (DFT) study of the magnetic anisotropy of nine-monolayer Fe, FeCo, and FeCo films with B, C, and N dopants placed in octahedral interstitial positions. The theoretical study is based on calculations using the full-potential local-orbital code FPLO and the generalized gradient approximation. The chemical disorder in the FeCo layers was modeled using the virtual crystal approximation. The structures of the layers were subjected to optimization of the geometry of the interlayer spacings and the neighborhood of the dopant sites. We determined the local magnetic moments and the excess charge at each layer position. We also identified the influence of dopant atoms on the magnetic properties of FeCo layers, such as magnetization and magnetic anisotropy.
description: 7 pages, 5 figures
Computational Literary Genre Stylistics
Creators: name: Schöch, Christof
Publisher: name: Zenodo
Year: 2013
Subjects: computational stylistics
literary genres
French Literature

description: The project in a nutshell: This project will investigate the relation between literary genres (generic facets) and style (stylistic attributes). Analyses are based on large collections of literary texts and use or develop state-of-the-art methods in computational stylistics and text analysis. This will enable the project to combine attention to minute stylistic details with the investigation of large trends and patterns in literary history.

What does the project aim to accomplish? The project brings together scholars from Romance Philology and Computer Scientists, building a common ground in Computational Philology. It aims to change the way we think about the concepts of genre and style as well as about the relation between literary interpretation and computation. In particular, the project aims to strengthen the engagement with digital methods in Romance Philology.
Light localization in nonuniformly randomized lattices
Creators: name: Kartashov, Yaroslav V.
name: Konotop, Vladimir V.
name: Vysloukh, Victor A.
name: Torner, Lluis
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We address Anderson localization of light in disordered optical lattices where the disorder strength varies across the transverse direction. Such variation changes the preferred domains where formation of localized eigenmodes is most probable, hence drastically impacting light localization properties. Thus, step-like disorder results in formation of modes with different decay rates at both sides of the interface, while a smoothly varying disorder yields appearance of modes that are extended within weakly disordered domains and rapidly fade away in strongly disordered domains.
description: 3 pages, 5 figures, to appear in Optics Letters
Design of a Support Tool for Citizens Engaging in Urban Planning Online
Creators: name: Bliss Taylor, Coral
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Urban and Regional Planning
subject: FOS: Social and economic geography
subject: Urban Planning
subject: participation
subject: engagement
subject: Online
subject: web 2.0
subject: e-planning

description: Online engagement in urban planning is accessible and convenient, but lacks face-to-face expert feedback and support. This research undertakes design of online support for lay citizens, to complement online participation environments. The design examines multiple planning strategy alternatives at various scales and perspectives. It calls for communication using visuals, examples, comparison, discussion of trade-offs, and providing for varied communication preferences. It calls for information specific to existing levels of cooperation and agreement, collective interests, values, and responsibilities, need for resource management, costs of strategies, and explicitly addressing value conflicts. A prototype is constructed using a selection of design components, then tested via online survey, and analysed quantitatively and qualitatively. Results indicate that users appreciated the information and features, and felt informed, confident, and more inclined to contribute to planning. It is concluded that the proposed solution can supplement missing support and feedback, should be further developed, and can be adopted.
Closed-form formulas, determinantal expressions, recursive relations, power series, and special values of several functions used in Clark--Ismail's two conjectures
Creators: name: Li, Yan-Fang
name: Lim, Dongkyu
name: Qi, Feng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 33B10, Secondary 15A15, 26A24, 26A48, 26A51, 33B15, 44A10, 41A58

description: In the paper, by virtue of the famous formula of Faà di Bruno, with the aid of several identities of partial Bell polynomials, by means of a formula for derivatives of the ratio of two differentiable functions, and with availability of other techniques, the authors establish closed-form formulas in terms of the Bernoulli numbers and the second kind Stirling numbers, present determinantal expressions, derive recursive relations, obtain power series, and compute special values of the function $\frac{v^j}{1-\operatorname{e}^{-v}}$, its derivatives, and related ones used in Clark--Ismail's two conjectures. By these results, the authors also discover a formula for the determinant of a Hessenberg matrix and derive logarithmic convexity of a sequence related to the function and its derivatives.
description: 23 pages
The Quality Of Massive Open Online Collaboration
Creators: name: Ferschke, Oliver
Publisher: name: Zenodo
Year: 2013
Subjects: wikipedia
natural language processing
computational linguistics
machine learning
text classification
information quality management
text quality assessment
information quality
writing quality
collaboration
collaborative writing

description: User generated content is the main driving force of the increasingly social web. Participatory and collaborative content production has largely replaced the traditional ways of information sharing and make up a large share of the daily information consumed by web users.

The main properties of user generated content are a low publication threshold and little or no editorial control. While this has positively affected the variety and timeliness of the available information, it causes an even higher variance in quality than the already heterogeneous quality of traditional web content.

In this project, we focus on the quality of collaboratively created texts. Using the example of Wikipedia, we investigate how the quality of articles can be assessed automatically and how we can apply language technology to facilitate quality assurance on a large scale.

In a first scenario, we analyze two corpora of Wikipedia article discussion pages extracted from the English Wikipedia and the Simple English Wikipedia, which we manually annotated with quality-directed speech act labels. We show how these corpora can be used to automatically identify the problems and solutions discussed by the community. We finally discuss possibilities how this approach can help to improve work coordination in Wikipedia and ultimately improve the quality assurance process.

In a second scenario, we focus on analyzing the article quality directly. Instead of applying abstract quality scores to each article, we approach the problem from a different direction and aim to identify concrete quality problems. Wikipedia already provides a rich set of quality flaw markers, which we extract on a large scale and use as training data for automatic quality flaw prediction, which can assist authors in improving the quality of their articles. In this context, we furthermore analyze the topic prevalence of individual flaw types, i.e. the phenomenon that particular flaws appear more often in articles from certain topics. This biased distribution negatively influences the data samples used for machine learning experiments and thus warrants further investigation.
MSstats: Next Generation Statistical Mass Spectrometry in R
Creators: name: Staniak, Mateusz
name: Huang, Ting
name: Kempegowda, Ajeya
name: Choi, Meena
name: Vitek, Olga
Publisher: name: Zenodo
Year: 2020
Subjects: mass spectrometry
statistical software

description: Slides from a Essential Open Source Software for Science demo of the MSstats package.
Merger induced scatter and bias in the cluster mass - Sunyaev-Zeldovich effect scaling relation
Creators: name: Krause, Elisabeth
name: Pierpaoli, Elena
name: Dolag, Klaus
name: Borgani, Stefano
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine sources of scatter in scaling relations between galaxy cluster mass and thermal Sunyaev-Zeldovich (SZ) effect using cluster samples extracted from cosmological hydrodynamical simulations. Overall, the scatter of the mass-SZ scaling relation is well correlated with the scatter in the mass-halo concentration relation with more concentrated halos having stronger integrated SZ signals at fixed mass. Additional sources of intrinsic scatter are projection effects from correlated structures, which cause the distribution of scatter to deviate from log-normality and skew it towards higher inferred masses, and the dynamical state of clusters. We study the evolution of merging clusters based on simulations of 39 clusters and their cosmological environment with high time resolution. This sample enables us to study for the first time the detailed evolution of merging clusters around the scaling relation for a cosmologically representative distribution of merger parameters. Major mergers cause an asymmetric scatter such that the inferred mass of merging systems is biased low. We find mergers to be the dominant source of bias towards low inferred masses: over 50% of outliers on this side of the scaling relation underwent a major merger within the last Gigayear. As the fraction of dynamically disturbed clusters increases with redshift, our analysis indicates that mergers cause a redshift-dependent bias in scaling relations. Furthermore, we find the SZ morphology of massive clusters to be well correlated with the clusters' dynamical state, suggesting that morphology may be used to constrain merger fractions and identify merger-induced outliers of the scaling relation.
description: submitted to MNRAS
The Y-triangle move does not preserve Intrinsic Knottedness
Creators: name: Flapan, Erica
name: Naimi, Ramin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We answer the question "Does the Y-triangle move preserve intrinsic knottedness?" in the negative by giving an example of a graph that is obtained from the intrinsically knotted graph K_7 by triangle-Y and Y-triangle moves but is not intrinsically knotted.
description: 5 pages, 2 figures
Implications of the LHC two-photon signal for two-Higgs-doublet models
Creators: name: Ferreira, P. M.
name: Santos, Rui
name: Sher, Marc
name: Silva, Joao P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the implications for Two Higgs Doublet Models of the recent announcement at the LHC giving a tantalizing hint for a Higgs boson of mass 125 GeV decaying into two photons. We require that the experimental result be within a factor of two of the theoretical Standard Model prediction, and analyze the type I and type II models as well as the lepton-specific and flipped models, subject to this requirement. It is assumed that there is no new physics other than two Higgs doublets. In all of the models, we display the allowed region of parameter space taking the recent LHC announcement at face value, and we analyze the $W^+W^-$, $ZZ$, $\bar{b}b$ and $τ^+τ^-$ expectations in these allowed regions. Throughout the entire range of parameter space allowed by the $γγ$ constraint, the number of events for Higgs decays into $WW$, $ZZ$ and $b \bar b$ are not changed from the Standard Model by more than a factor of two. In contrast, in the Lepton Specific model, decays to $τ^+ τ^- $ are very sensitive across the entire $γγ$-allowed region.
description: Latex, 6 pages, 4 figures; v2 - added 2 references
Supplemental Material for Mostovoy et al., 2020
Creators: name: Mostovoy, Yulia
name: Yilmaz, Feyza
name: Chow, Stephen K.
name: Chu, Catherine
name: Lin, Chin
name: Geiger, Elizabeth A.
name: Meeks, Naomi J. L.
name: Chatfield, Kathryn C.
name: Coughlin, Curtis R.
name: Surti, Urvashi
name: Pui-Yan Kwok
name: Shaikh, Tamim H.
Publisher: name: GSA Journals
Year: 2020
Subjects: subject: Computational Biology
subject: 60408 Genomics
subject: FOS: Biological sciences
subject: 60407 Genome Structure and Regulation
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: Supplemental figures, tables, and file
One particle and Drell-Yan pair associated production
Creators: name: Ceccopieri, Federico Alberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We briefly discuss the collinear factorization formula for the associated production of one particle and a Drell-Yan pair in hadronic collisions. We outline possible applications of the results to three different research areas.
description: Presented at the workshop "30 years of strong interactions", Spa, Belgium, 6-8 April 2011
Computational Screening Of Functionalized  Zinc Porphyrins For Dye Sensitized Solar Cells
Creators: name: Ørnsø, Kristian Baruël
name: Garcia-Lastra, Juan Maria
name: Thygesen, Kristian Sommer
Publisher: name: Zenodo
Year: 2013
Subjects: Dye Sensitized Solar Cells
DFT
computational screening
zinc porphyrins

description: Poster presenting our recent paper in which we have performed a computational Density Functional Theory based screening of 1029 functionalized zinc porphyrins dyes for use in Dye Sensitized Solar Cells. We present the fundamental and optical gaps and use these to asign a level alignment quality to the dye candidates.
Sampled-Data and Harmonic Balance Analyses of Average Current-Mode Controlled Buck Converter
Creators: name: Fang, Chung-Chieh
Publisher: name: arXiv
Year: 2012
Subjects: subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Dynamics and stability of average current-mode control of buck converters are analyzed by sampled-data and harmonic balance analyses. An exact sampled-data model is derived. A new continuous-time model "lifted" from the sampled-data model is also derived, and has frequency response matched with experimental data reported previously. Orbital stability is studied and it is found unrelated to the ripple size of the current-loop compensator output. An unstable window of the current-loop compensator pole is found by simulations, and it can be accurately predicted by sampled-data and harmonic balance analyses. A new S plot accurately predicting the subharmonic oscillation is proposed. The S plot assists pole assignment and shows the required ramp slope to avoid instability.
description: Submitted to International Journal of Circuit Theory and Applications on August 9, 2011; Manuscript ID: CTA-11-0168
Over-populated gauge fields on the lattice
Creators: name: Berges, J.
name: Schlichting, S.
name: Sexty, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study nonequilibrium dynamics of SU(2) pure gauge theory starting from initial over-population, where intense classical gauge fields are characterized by a single momentum scale Q_s. Classical-statistical lattice simulations indicate a quick evolution towards an approximate scaling behavior with exponent 3/2 at intermediate times. Remarkably, the value for the scaling exponent may be understood as arising from the leading O(g^2) contribution in the presence of a time-dependent background field. The phenomenon is associated to weak wave turbulence describing an energy cascade towards higher momenta. This particular aspect is very similar to what is observed for scalar theories, where an effective cubic interaction arises because of the presence of a time-dependent Bose condensate.
description: 15 pages, 4 figures
Cartilage boundary lubrication and rheology of proteoglycan 4 + hyaluronan solutions and synovial fluid
Creators: name: Ludwig, Taryn Elaine
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Biomedical
subject: Proteoglycan 4
subject: Hyaluronan
subject: Synovial Fluid

description: Synovial fluid (SF) is the viscous fluid present within articular joints that contributes to load bearing and lubrication functions. Proteoglycan 4 (PRG4) and hyaluronan (HA) in SF contribute synergistically to cartilage boundary lubrication. However, changes in SF PRG4 and HA content with osteoarthritis (OA) and associated effects on cartilage boundary lubricating function are not fully understood. Furthermore, the effects of PRG4+HA interaction on solution viscosity have not been thoroughly characterized. The objectives of this thesis were to 1) investigate the relationship between PRG4 and HA composition and boundary lubricating function of normal and OA SF, and 2) to investigate how the concentration and structure of PRG4 contributes to interactions with itself and HA, and subsequently the boundary lubricating and rheological properties of SF. Novel and previously characterized biochemical and biomechanical methods were used to evaluate boundary lubricant composition and lubricating ability of SF. While not all OA SF samples had low PRG4, samples that had low PRG4 concentration and decreased HA molecular weight (MW) demonstrated decreased cartilage boundary lubricating ability in vitro, which could be restored by addition of PRG4. SF aspirated after a flare reaction to intra-articular injection that had low PRG4 and an approximately normal HA MW distribution demonstrated normal cartilage boundary lubricating ability. In purified solutions of PRG4 and HA, decreased PRG4 or decreased high MW HA limited cartilage boundary lubricating ability. PRG4 and recombinant human PRG4 increased the viscosity of HA solutions at low concentrations, but decreased the viscosity of high concentration HA solutions. The intra- and inter-molecular disulfide bonded structure of PRG4 was observed to be important for its contributions to both PRG4+HA cartilage boundary lubricating ability and PRG4+HA solution viscosity. These results demonstrate that alterations in both PRG4 and HA content in SF may have negative effects on SF cartilage boundary lubricating and rheological function, and are consistent with a non-covalent, crowding mechanism of interaction. They suggest that maintaining PRG4 and HA content in SF during injury and disease, through the development of new PRG4±HA biotherapeutic treatments, may be able to both protect cartilage from degeneration and restore SF viscosity in vivo.
Gauge waves generation and detection in Aharonov-Bohm electrodynamics
Creators: name: Minotti, F.
name: Modanese, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The extended Aharonov-Bohm electrodynamics has a simple formal structure and allows to couple the e.m. field also to currents which are not locally conserved, like those resulting from certain non-local effective quantum models of condensed matter. As it often happens in physics and mathematics when one tries to extend the validity of some equations or operations, new perspectives emerge in comparison to Maxwell theory, and some ''exotic'' phenomena are predicted. For the Aharonov-Bohm theory the main new feature is that the potentials $A^μ$ become univocally defined and can be measured with probes in which the ''extra-current'' $I=\partial_μj^μ$ is not zero at some points. As a consequence, it is possible in principle to detect pure gauge-waves with $\mathbf{E}=\mathbf{B}=0$, which would be regarded as non-physical in the Maxwell gauge-invariant theory with local current conservation. We discuss in detail the theoretical aspects of this phenomenon and propose an experimental realization of the detectors. A full treatment of wave propagation in anomalous media with extra-currents and of energy-momentum balance issues is also given.
description: 31 pages, 1 figure
Supplementary document for Bifocal lenses with adjustable intensities enabled by bilayer liquid crystal structures - 7151914.pdf
Creators: name: Zhou, YingJie
name: ye, xianglin
name: Li, Zhu
name: Tang, Dongliang
name: Fan, Fan
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Derivation of Eq.1,fabrication processes of LC polymer and LC cell,and the change of two foci with the thickness of the middle substrate.
Hausdorff dimension of operator semistable Lévy processes
Creators: name: Kern, Peter
name: Wedrich, Lina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G51

description: Let $X=\{X(t)\}_{t\geq0}$ be an operator semistable Lévy process in $\rd$ with exponent $E$, where $E$ is an invertible linear operator on $\rd$ and $X$ is semi-selfsimilar with respect to $E$. By refining arguments given in Meerschaert and Xiao \cite{MX} for the special case of an operator stable (selfsimilar) Lévy process, for an arbitrary Borel set $B\subseteq\rr_+$ we determine the Hausdorff dimension of the partial range $X(B)$ in terms of the real parts of the eigenvalues of $E$ and the Hausdorff dimension of $B$.
description: 23 pages
The Disk-Halo Transition of the Milky Way Magnetic Field
Creators: name: Cooper, Brendan
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Astronomy and Astrophysics
subject: Milky Way
subject: Magnetic Field
subject: Disk-Halo transition
subject: rotation measure
subject: warp

description: For this work I used new observations from the Southern Latitude Extension (SLE), which complements the Northern Latitude Extension (NLE) of the Canadian Galactic Plane Survey (CGPS) to study the magnetic ﬁeld transition from the disk to the halo of the Milky Way Galaxy. From these data, I determined 136 reliable RMs for compact extragalactic sources. I combined these data with 549 previously observed RMs from the CGPS and NLE in the same longitude region as the SLE. Using these RM data, I did some modelling to determine that the most plausible ﬁeld conﬁguration in the halo region North and South of the Galactic disk is a counter-clockwise azimuthal ﬁeld, which is directed opposite to the clockwise ﬁeld of the disk (as viewed from the North Galactic pole). Furthermore, the strength of ﬁeld in the Southern halo seems to be half the value of the ﬁeld estimated in the Northern halo. This may be the result of a localized feature known as ‘Region A’ which coincides with my observation region. Finally, and perhaps most signiﬁcantly, there appears to be no evidence for a warp in either the magnetic ﬁeld or the electron density, despite the presence of a warp in the observed neutral gas at the same longitudes. This suggests the possibility of a species separation at the edge of the Galaxy where the neutrals experience a warp, but the charged particles do not
NLO analysis of inclusive jet, tagged jet and di-jet production in Pb+Pb collisions at the LHC
Creators: name: Vitev, Ivan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present results and predictions at next-to-leading order for the recent LHC lead-lead run at a center-of-mass energy of 2.76 TeV per nucleon-nucleon pair. Specifically, we focus on the suppression the single and double inclusive jet cross sections and demonstrate how the di-jet asymmetry, recently measured by ATLAS and CMS, can be extracted from this general result. The case of jets tagged by an electroweak boson is exemplified by the $Z^0$+jet channel. We predict a signature transition from enhancement to suppression of the tagged jet related to the medium-induced modification of the parton shower. Finally, we clarify the relation between the suppression of inclusive jets, tagged jets and di-jets and the quenching of inclusive particles on the example of the recent ALICE charged hadron attenuation data.
description: Version abridged to 4 pages to be published in J. Phys. G
High School Principal and Student Power Relationships When Students Choose Distance Education Courses
Creators: name: Winkelmans, Phillip Timothy
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Education--Secondary
subject: Foucault
subject: distance education
subject: Principals
subject: Alberta
subject: choice
subject: power
subject: Case Study
subject: Servant Leadership
subject: students

description: This mixed methods study explains how principals of conventional high schools in Alberta, Canada responded in an educational context where students over the age of 16 did not require their principals’ approval to enroll in external distance education courses. The research questions address this through power relations between principals and students, as manifested by what principals and students said and did in this context. Foucault’s post-structuralist framework of disciplinary, governmentality, and pastoral power techniques provided the theoretical framework for analyzing discursive and nondiscursive practices. Disciplinary power has productive subjects as its focus. Governmentality embodies ways in which states control individuals by dispersing power among populations. The focus of pastoral power is the ethical development of subjects. The initial subjects were 87 Alberta high school principals that completed survey questions capturing demographic data, servant leadership characteristics, and distance education perspectives. Survey results assisted in identifying nine principals that constituted cases in a multiple-case study. The principal and a student at each school participated in interviews that provided primary data. Foucault’s theoretical framework offered 31 power techniques as factors for coding interviews. This study found that the nine principals tended to be conveyors of power, primarily through disciplinary and governmentality techniques. These techniques manifested through three dominant practices: (1) institutionalizing access to distance education courses through the school; (2) supporting course and program choice to increase graduation rates, keep students busy, earn credit funding from the province, and address the life and learning needs of specific students; and (3) assigning students to the classroom option, except in special situations, if both distance education and classroom options were available. The nine students in this study tended to constitute themselves as targets of disciplinary and pastoral power. In the context of distance education course choice, three practices were found to operate synergistically on students: (1) the province, through the school, offered numerous approved programs and choices; (2) students chose classroom and distance education programs or courses they needed or that represented interests; and (3) the school accommodated special life circumstances or learning requirements through classroom and distance education offerings.
Pion gravitational form factors at large momentum transfer in the instant-form relativistic impulse approximation approach
Creators: name: Krutov, A. F.
name: Troitsky, V. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend our relativistic theory of gravitational structure of composite hadrons to obtain the pion gravitational form factors at large momentum transfers. The approach was used in the case of intermediate region of the variable in our preceding works arXiv:2010.11640 and arXiv:2201.04991. The calculation is carried out in the framework of a relativistic composite-particle model complemented by the special relativistic form of impulse approximation. It is found that in the limit of massless and pointlike quarks, the obtained asymptotic expansion coincides with the predictions of perturbative QCD for gravitational pion form factors. The principal contribution to the asymptotics, coinciding with the predictions of QCD, is given by the relativistic effect of spin rotation. In particular, the asymptotics of the D form factor is completely determined by this kinematic effect. Several constraints on the allowed form of gravitational form factors of quarks are derived.
description: 12 pages (revtex), no figures. V2: minor changes, accepted to PRD
Sensitivity To Nonaccidental Configurations Of Twoline Stimuli
Creators: name: Sleurs, Charlotte
name: Kubilius, Jonas
name: Op de Beeck, Hans P.
name: Wagemans, Johan
Publisher: name: Zenodo
Year: 2013
Subjects: non-accidental properties
visual perception
perceptual organization
psychophysics
regularity

description: According to recognition-by-components theory, object recognition relies on a specific subset of three-dimensional shapes called geons. In particular, these configurations are a powerful cue to a three dimensional object reconstruction because their two dimensional projection remains viewpoint-invariant. While a large body of literature has demonstrated sensitivity to changes in these so-called non-accidental configurations, it remains unclear what information is used in establishing such sensitivity. In this study, we explored a possibility that non-accidental configurations can already be inferred from the basic constituents of objects, namely, their edges. We constructed a set of stimuli composed of two lines corresponding to various non-accidental properties and configuration of geons, including collinearity, alignment, curvature of contours, curvature of configuration axis, expansion, cotermination, and junction type. Using a simple visual search paradigm, we demonstrated that participants were faster at detecting targets that differed from distractors in a non-accidental configuration than in a metric one. Given that such sensitivity emerged from a configuration of only two lines, our results open a possibility that non-accidental configurations could be encoded at the earliest stages of the visual information processing.
Anomalous low-energy phonons in nearly tetragonal BiFeO3 thin films
Creators: name: Choi, K. -Y.
name: Do, S. H.
name: Lemmens, P.
name: Wulferding, D.
name: Woo, C. S.
name: Lee, J. H.
name: Chu, K.
name: Yang, C. -H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present evidence for a concomitant structural and ferroelectric transformation around $T_S\sim 360$ K in multiferroic BiFeO$_3$/LaAlO$_3$ thin films close to the tetragonal phase. Phonon excitations are investigated by using Raman scattering as a function of temperature. The low-energy phonon modes at 180-260 cm$^{-1}$ related to the FeO$_6$ octahedron tilting show anomalous behaviors upon cooling through $T_S$; (i) a large hardening amounting to 15 cm$^{-1}$, (ii) an increase of intensity by one order of magnitude, and (iii) an appearance of a dozen new modes. In contrast, the high-frequency modes exhibit only weak anomalies. This suggests an intimate coupling of octahedron tilting to ferroelectricity leading to a simultaneous change of structural and ferroelectric properties.
description: 4 pages, 5figures