cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the effect of nocturnal radiation fog on the development of the daytime convective boundary layer: A large-eddy simulation study
Creators: name: Schwenkel, Johannes
name: Maronga, Björn
Publisher: name: Weinheim [u.a.] : Wiley
Year: 2022
Subjects: subject: boundary-layer development
subject: diurnal cycle
subject: large-eddy simulation
subject: misrepresenting fog
subject: PALM
subject: radiation fog
subject: turbulence
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: The potential effect of failing to predict nocturnal deep radiation fog on the development of the daytime convective boundary layer (CBL) is studied using large-eddy simulations. Typical spring and autumn conditions for the mid-latitudes are used to perform simulations in pairs. Fog formation is allowed in one simulation of each pair (nocturnal fog [NF]) and is suppressed in the other (clear sky [CS]). This allows for the identification of properties (temperature, humidity, boundary-layer depth), conditions, and processes in CBL development that are affected by fog. Mixing-layer temperatures and boundary-layer depths immediately after fog dissipation in CSs are shown to be up to 2.5 K warmer and 200 m higher, respectively, than the NF counterparts. Additionally, greater water vapor mixing ratios are found in the CSs. However, owing to greater temperatures, relative humidities at the CBL top are found to be less in CSs than in the corresponding NFs. This relative humidity difference might be an indication that cloud formation is suppressed to some extent. The magnitude of the differences between CSs and NFs during the day is mainly correlated to the fog depth (in terms of duration and liquid water path), whereas the key processes responsible for differences are the atmospheric long-wave cooling of the fog layer (for temperature development) and droplet deposition (for water vapor mixing ratio development).
A Parametric Study of Erupting Flux Rope Rotation. Modeling the "Cartwheel CME" on 9 April 2008
Creators: name: Kliem, B.
name: Török, T.
name: Thompson, W. T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The rotation of erupting filaments in the solar corona is addressed through a parametric simulation study of unstable, rotating flux ropes in bipolar force-free initial equilibrium. The Lorentz force due to the external shear field component and the relaxation of tension in the twisted field are the major contributors to the rotation in this model, while reconnection with the ambient field is of minor importance. Both major mechanisms writhe the flux rope axis, converting part of the initial twist helicity, and produce rotation profiles which, to a large part, are very similar in a range of shear-twist combinations. A difference lies in the tendency of twist-driven rotation to saturate at lower heights than shear-driven rotation. For parameters characteristic of the source regions of erupting filaments and coronal mass ejections, the shear field is found to be the dominant origin of rotations in the corona and to be required if the rotation reaches angles of order 90 degrees and higher; it dominates even if the twist exceeds the threshold of the helical kink instability. The contributions by shear and twist to the total rotation can be disentangled in the analysis of observations if the rotation and rise profiles are simultaneously compared with model calculations. The resulting twist estimate allows one to judge whether the helical kink instability occurred. This is demonstrated for the erupting prominence in the "Cartwheel CME" on 9 April 2008, which has shown a rotation of \approx 115 degrees up to a height of 1.5 R_sun above the photosphere. Out of a range of initial equilibria which include strongly kink-unstable (twist Phi=5pi), weakly kink-unstable (Phi=3.5pi), and kink-stable (Phi=2.5pi) configurations, only the evolution of the weakly kink-unstable flux rope matches the observations in their entirety.
description: Solar Physics, submitted
On the Severi problem in arbitrary characteristic
Creators: name: Christ, Karl
name: He, Xiang
name: Tyomkin, Ilya
Publisher: name: Berlin ; Heidelberg : Springer
Year: 2022
Subjects: subject: modul space
subject: rationalcurves
subject: varieties
subject: dimension
subject: surface
subject: geometry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: In this paper, we show that Severi varieties parameterizing irreducible reduced planar curves of a given degree and geometric genus are either empty or irreducible in any characteristic. Following Severi’s original idea, this gives a new proof of the irreducibility of the moduli space of smooth projective curves of a given genus in positive characteristic. It is the first proof that involves no reduction to the characteristic zero case. As a further consequence, we generalize Zariski’s theorem to positive characteristic and show that a general reduced planar curve of a given geometric genus is nodal.
A Width Parameter Estimation Through Equivalent Rectangle Methodology for Hydraulic Modeling Applications
Creators: name: Bonilla Brenes, Jose Ricardo
name: Vega, Rafael Oreamuno
name: Hack, Jochen
Publisher: name: Guelph : Computational Hydraulics International
Year: 2022
Subjects: subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: EPA SWMM hydraulic modeling requires the estimation of different parameters allowing the determination of the basin's response upon a given precipitation event. Some physical parameters, such as area or perimeter, are measurable and can be accurately determined; however, other parameter estimation presents greater uncertainty, such as the width parameter. For regular and uniform drainage areas, width parameter estimation is relatively simple; however, when a complete irregular basin analysis is required, width determination presents greater uncertainty, and its representativeness becomes complicated to define. Width determination is idealized with the representation of a rectangle, where, for an equal area, a higher width will result in a faster response of the basin, while a lower width will result in a slower response of the basin. This paper attempts to estimate a representative value of width for a realistic, irregularly shaped basin by defining the equivalent rectangle, which takes into account the area, perimeter, and compactness index of the basin. The compactness index can be used to classify the basin by its shape. The shape of the basin is an indicator of how the precipitation histograms are temporally distributed and how the water flows through the basin, i.e., it defines the response speed of the basin, as the width parameter does in modeling. The width parameter has a high sensitivity in the EPA SWMM modeling results; therefore, an inaccurate estimation of the parameter leads to unrepresentative results. For this reason, this study seeks to find an optimal methodology to reduce modeling uncertainty and achieve more accurate simulations of an irregular watershed's hydrological response.
Close-to-process compensation of geometric deviations on implants based on optical measurement data
Creators: name: Denkena, Berend
name: Bergmann, Benjamin
name: Kaiser, Sebastian
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2022
Subjects: subject: Compensation
subject: G-Code Adaption
subject: Implant production
subject: Optical measurement
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: The production of implants is challenging due to their complex shapes, the filigree structures and the great regulatory effort. Therefore, a manufacturing cell with an integrated optical measurement was realized. The measurement system is used to determine the geometric deviations and to fulfill the documentation obligation. The measurement data are used to create a matrix containing the nominal coordinates and the error vector for compensation points at the relevant shapes. Based on this, the corresponding tool-path segments are isolated in the G-Code and compensated in order to reduce the geometric deviations. With this method, the deviation could be reduced by 85 %. However, it is pointed out, that the result of the compensation strongly depends on the quality of the optical measurement data.
Dynamics of quantum light in integrated nonlinear waveguide arrays and generation of robust continuous variable entanglement
Creators: name: Rai, Amit
name: Angelakis, Dimitris G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a class of nonlinear waveguide arrays where the waveguides are endowed with quadratic non- linearity and are coupled through the evanescent overlap of the guided modes. We study both the stimulated and spontaneous process in the array and show the viability of such an array as a platform for generating both bipartite and tripartite continuous variable entanglement on demand. We explicitly address the affect of realistic losses on the entanglement produced, briefly discuss the possible types of nonlinear materials that could be used, and suggest solutions to the possible phase matching issues in the waveguides. The simultaneous generation and manipulation of the light on a single waveguide chip circumvents the usual bandwidth problems associated with the use of external bulky optical elements and makes this avenue promising for further investigation.
description: 5 pages, 5 figures
Feasibility Evaluation of Milling Designs Using Multi-Agent Systems
Creators: name: Plappert, S.
name: Becker, C.
name: Gembarski, P.C.
name: Lachmayer, R.
Publisher: name: Cambridge : Cambridge University Press
Year: 2022
Subjects: subject: CommonKADS
subject: computer-aided design (CAD)
subject: design evaluation
subject: knowledge-based engineering (KBE)
subject: multi-agent systems
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: During product development, many decisions have to be made that affect the entire product life cycle and often lead to errors that cause additional effort. To proactively support the engineer in evaluating his design in a CAD program, in this paper an approach to evaluate milling designs using a multi-agent system (MAS) is presented. The CommonKADS method is used and the MAS is validated against an application example of a gearbox housing that has been checked for design guidelines, standards, and tool or machine portfolios.
The effect of topology on the structure and free energy landscape of DNA kissing complexes
Creators: name: Romano, Flavio
name: Hudson, Alex
name: Doye, Jonathan P. K.
name: Ouldridge, Thomas E.
name: Louis, Ard A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We use a recently developed coarse-grained model for DNA to study kissing complexes formed by hybridization of complementary hairpin loops. The binding of the loops is topologically constrained because their linking number must remain constant. By studying systems with linking numbers -1, 0 or 1 we show that the average number of interstrand base pairs is larger when the topology is more favourable for the right-handed wrapping of strands around each other. The thermodynamic stability of the kissing complex also decreases when the linking number changes from -1 to 0 to 1. The structures of the kissing complexes typically involve two intermolecular helices that coaxially stack with the hairpin stems at a parallel four-way junction.
Composite Spin Liquid in Correlated Topological Insulator - Spin Liquid without Spin-Charge Separation
Creators: name: He, Jing
name: Liang, Ying
name: Kou, Su-Peng
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper, we found a new type of insulator - composite spin liquid which can be regarded as a short range B-type topological spin-density-wave. Composite spin liquid is topological ordered state beyond the classification of traditional spin liquid states. The elementary excitations are the "composite electrons" with both spin degree of freedom and charge degree of freedom, together with topological spin texture. This topological state supports chiral edge mode but no topological degeneracy.
description: 20 figure2, 17 pages. Phys. Rev. B, in press
On a response surface investigation of water transport in membrane humidifiers
Creators: name: McCarthy, Edward James
Publisher: name: University of British Columbia
Year: 2009

description: The design of experiments method was applied to create empirical models to evaluate performance of membrane humidifiers. Experiments were run and the results analyzed to develop a combined metric for humidifier performance, provide information regarding effects, and compare geometries and membranes. A range of experimental designs were evaluated and a central composite design selected to produce a response surface model. The numeric factors chosen were wet and dry stream flow rates and temperatures and the categoric factor was pressure. Four humidifiers were tested with two distinct geometries and two membranes. The experimental analysis provided factorial models for response surfaces in six performance metrics: water transfer rate; water recovery ratio; humidity ratio; relative humidity; dew point; and dew point approach temperature. All of these models displayed overall model significance and a high signal-to-noise ratio, but also an overall lack of fit to the second-order model. This demonstrated the suitability of the design of experiments approach but suggests the use of a higher-order model. Based on these models and a priori information regarding performance metrics, a combined metric was proposed incorporating relative humidity, water recovery ratio, and water transport rate. Performance bounds are set using relative humidity, and water recovery ratios inside these bounds are plotted. Dry side flow rate was found to have a positive effect on total water transport but a negative one on saturation-based metrics. Wet side flow rate had a positive effect on total water transport and a negative effect on relative transport metrics. Dry side temperature had an overall negative effect. Wet side temperature had a similar effect to wet side flow rate. Low pressure had generally higher performance, but high pressure mitigated negative effects in dry side temperature and flow rate. The two geometries showed similar relative performance. The ionic membrane displayed consistently better water transport than the porous polymer membrane. Based on these results simplified central composite designs for humidifier characterization are proposed, eliminating dry side temperature and pressure as a factor and allowing the possibility of varying flow rates in tandem. These tests have respectively 17 and 11 test runs for full humidifier characterization.
The cataclysmic variable orbital period gap: More evident than ever
Creators: name: Schreiber, Matthias R.
name: Belloni, Diogo
name: Schwope, Axel D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recently, large and homogeneous samples of cataclysmic variables (CVs) identified by the Sloan Digital Sky Survey (SDSS) were published. In these samples, the famous orbital period gap, which is a dearth of systems in the orbital period range ~2-3 hr and the defining feature of most evolutionary models for CVs, has been claimed not to be clearly present. If true, this finding would completely change our picture of CV evolution. In this Letter we focus on potential differences with respect to the orbital period gap between CVs in which the magnetic field of the white dwarf is strong enough to connect with that of the donor star, so-called polars, and non-polar CVs as the white dwarf magnetic field in polars has been predicted to reduce the strength of angular momentum loss through magnetic braking. We separated the SDSS I-IV sample of CVs into polars and non-polar systems and performed statistical tests to evaluate whether the period distributions are bimodal as predicted by the standard model for CV evolution or not. We confirm the existence of a period gap in the SDSS I-IV sample of non-polar CVs with >98 per cent confidence. The boundaries of the orbital period gap are 147 and 191 minutes, with the lower boundary being different to previously published values (129 min). The orbital period distribution of polars from SDSS I-IV is clearly different and does not show a similar period gap. The SDSS samples as well as previous samples of CVs are consistent with the standard theory of CV evolution. Magnetic braking does indeed seem get disrupted around the fully convective boundary, which causes a detached phase during CV evolution. In polars, the white dwarf magnetic field reduces the strength of magnetic braking and consequently the orbital period distribution of polars does not display an equally profound and extended period gap as non-polars.
description: Accepted for publication in Astronomy & Astrophysics Letters
Towards collaborative partnerships in the governance of Canadian health research ethics
Creators: name: Taylor, Kimberly
Publisher: name: University of British Columbia
Year: 2009

description: The most valuable resources common to all human health research endeavors are those individuals who voluntarily subject themselves to potential risks for the hope of improving human health and advancing medical science. Although human subjects’ participation in health research is acknowledged as instrumental to our understanding of health and illness and thereby an interest to society, the role of human subjects in determining how research is conducted, monitored, and, if successful, translated into health care, has been minimal until fairly recently. This paper argues from both moral and political grounds that meaningful and effective partnerships between human subjects and research communities ought to be mandated as a standard practice within Canadian policy guidelines for all health research initiatives that are conducive to collaborative engagements. By rendering decision-making a truly democratic endeavor, with the implementation of collaborative relationships between scientific and human subject communities with a similar framework to the Tri-Council Policy Statement and the Canadian Institute of Health Research’s guidelines on research involving Aboriginal People, a more transparent and accountable health research system will ensue. As a result, I argue, the health research enterprise in Canada as a whole will engender greater public trust.
An Information processing approach to the construct validation of leveling-sharpening
Creators: name: Lee, Jean C. Van Der
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: BF 311 L42 1974 Microfiche
subject: Perception
subject: Cognition
subject: Perceptional learning
subject: Motivation (Psychology)
subject: Reaction (Psychology)

description: Bibliography: p. 95-100.
Emitter near an arbitrary body: Purcell effect, optical theorem and the Wheeler-Feynman absorber
Creators: name: Venkatapathi, Murugesan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The altered spontaneous emission of an emitter near an arbitrary body can be elucidated using an energy balance of the electromagnetic field. From a classical point of view it is trivial to show that the field scattered back from any body should alter the emission of the source. But it is not at all apparent that the total radiative and non-radiative decay in an arbitrary body can add to the vacuum decay rate of the emitter (i.e.) an increase of emission that is just as much as the body absorbs and radiates in all directions. This gives us an opportunity to revisit two other elegant classical ideas of the past, the optical theorem and the Wheeler-Feynman absorber theory of radiation. It also provides us alternative perspectives of Purcell effect and generalizes many of its manifestations, both enhancement and inhibition of emission. When the optical density of states of a body or a material is difficult to resolve (in a complex geometry or a highly inhomogeneous volume) such a generalization offers new directions to solutions.
description: 18 pages, 2 figures
Geophysical analysis of an area affected by subsurface dissolution - case study of an inland salt marsh in northern Thuringia, Germany
Creators: name: Wadas, Sonja H.
name: Buness, Hermann
name: Rochlitz, Raphael
name: Skiba, Peter
name: Günther, Thomas
name: Grinat, Michael
name: Tanner, David C.
name: Polom, Ulrich
name: Gabriel, Gerald
name: Krawczyk, Charlotte M.
Publisher: name: Göttingen : Copernicus Publ.
Year: 2022
Subjects: subject: Germany
subject: Thuringia
subject: Aquifers
subject: Deposits
subject: Gravel
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: The subsurface dissolution of soluble rocks can affect areas over a long period of time and pose a severe hazard. We show the benefits of a combined approach using P-wave and SH-wave reflection seismics, electrical resistivity tomography, transient electromagnetics, and gravimetry for a better understanding of the dissolution process. The study area, "Esperstedter Ried"in northern Thuringia, Germany, located south of the Kyffhäuser hills, is a large inland salt marsh that developed due to dissolution of soluble rocks at approximately 300 m depth. We were able to locate buried dissolution structures and zones, faults and fractures, and potential fluid pathways, aquifers, and aquitards based on seismic and electromagnetic surveys. Further improvement of the model was accomplished by analyzing gravimetry data that indicates dissolution-induced mass movement, as shown by local minima of the Bouguer anomaly for the Esperstedter Ried. Forward modeling of the gravimetry data, in combination with the seismic results, delivered a cross section through the inland salt marsh from north to south. We conclude that tectonic movements during the Tertiary, which led to the uplift of the Kyffhäuser hills and the formation of faults parallel and perpendicular to the low mountain range, were the initial trigger for subsurface dissolution. The faults and the fractured Triassic and lower Tertiary deposits serve as fluid pathways for groundwater to leach the deep Permian Zechstein deposits, since dissolution and erosional processes are more intense near faults. The artesian-confined saltwater rises towards the surface along the faults and fracture networks, and it formed the inland salt marsh over time. In the past, dissolution of the Zechstein formations formed several, now buried, sagging and collapse structures, and, since the entire region is affected by recent sinkhole development, dissolution is still ongoing. From the results of this study, we suggest that the combined geophysical investigation of areas prone to subsurface dissolution can improve the knowledge of control factors, hazardous areas, and thus local dissolution processes.
"Distance mapping" and the 3-D structure of BB +30 3639
Creators: name: Akras, S.
name: Steffen, W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: BD +30 3639 is a member of a group of uncommon planetary nebula with Wolf-Rayet central star and higher expansion velocities in [O III] than in [N II] lines. Images and high-resolution spectra from the literature are used in order to construct a 3-D model of the nebula using the morpho-kinematic code SHAPE. We find that two homologous expansion laws are needed for the [N II] and [O III] shell. We conclude that the internal velocity field of BD +30 3639 decreases with the distance from the central star at least between the [O III] and [N II] shells. A cylindrical velocity component is used to replicate the high-speed bipolar collimated outflows. We also present a new kinematic analysis technique called "distance mapping". It uses the observed proper motion vectors and the 3-D velocity field to generate maps that can be used as a constraint to the morpho-kinematic modeling with SHAPE as well as improve the accuracy for distance determination. It is applied to BD+30 3639 using 178 internal proper motion vectors from Li et al. (2002) and our 3-D velocity field to determine a distance of 1.52 \pm 0.21 kpc. Finally, we find evidence for an interaction between the eastern part of nebula and the ambient H2 molecular gas.
description: 11 pages, 12 figures, 1 table, Accepted to MNRAS
title: Диффузионно-тепловые и гидродинамические эффекты при распространении фронта пламени в релаксационной камере сгорания с изменяющейся площадью поперечного сечения
title: Diffusion-Thermal and Hydrodynamic Effects during Flame Front Propagation in Relaxation Combustion Chamber with Variable Cross-Section
Creators: name: Алексеев, Максим Михайлович
name: Семенов, Олег Юрьевич
Publisher: name: Издательский центр СурГУ
Year: 2020

description: В экспериментальной работе представлены результаты исследования встречного распространения нескольких фронтов пламени в модельной релаксационной камере сгорания. Описаны гидродинамические и диффузионно-тепловые эффекты, возникающие при влиянии друг на друга двух фронтов пламени. Получена формула, объясняющая кинематику взаимодействия фронтов пламени.
description: The article presents the results of studying the counter propagation of several flame fronts in a model relaxation combustion chamber. The hydrodynamic and diffusion-thermal effects caused by several flame fronts influencing each other are described. A formula that solves the kinematics of the interaction between the flame fronts is obtained.
title: Разработка автоматизированной системы планирования и подготовки сборочного производства
title: Development of Automated Scheduling and Preparation System for Assembly Production
Creators: name: Бобровская, О. П.
name: Иванов, Фёдор  Фёдорович
Publisher: name: Издательский центр СурГУ
Year: 2020

description: Представлен процесс разработки автоматизированной системы на примере планирования и подготовки сборочного производства. Проведен анализ предметной области и обзор аналогов. Разработаны функциональная модель системы и инфологическая модель предметной области. Представлены интерфейс, возможности, а также перспективы развития автоматизированной системы.
description: The article describes the process of developing an automated system on the example of scheduling and preparation of the assembly production. The subject area is analyzed, similar systems are given, and the functional capabilities of the future system are determined. A functional model of the system is developed, an infological domain model is created. The interface of the developed system is presented, as well as a feasibility demonstration and development prospects.
Extended Tauc-Lorentz model (XTL) with log-normal distributed bandgap energies for optical permittivity in polycrystalline semiconductors
Creators: name: Xu, Chencheng
name: Min, Byungsul
name: Reineke-Koch, Rolf
Publisher: name: New York, NY : American Inst. of Physics
Year: 2022
Subjects: subject: Normal distribution
subject: Polycrystalline materials
subject: Band gap energy
subject: Grainsize
subject: Log-normal
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: An extended Tauc-Lorentz model is proposed to incorporate the bandgap variation in different grains in the polycrystalline semiconductors. The probability of a certain bandgap in the Tauc-Lorentz model is assumed to follow a log-normal distribution. After a Kramer-Kronig transform, the real part of this model is suggested as well. A comparison between this model and the experimental data in polycrystalline Si is carried out to validate this model. The experimental variation of grain size in the polycrystalline Si thin film can be correlated with the width of log-normal distribution of bandgap energies.
A Class of Special Solutions for the Ultradiscrete Painlevé II Equation
Creators: name: Isojima, Shin
name: Satsuma, Junkichi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A class of special solutions are constructed in an intuitive way for the ultradiscrete analog of $q$-Painlevé II ($q$-PII) equation. The solutions are classified into four groups depending on the function-type and the system parameter.
title: Тензорная модель учета потерь в компьютерной сети предприятия
title: Tensor Model for Losses Accounting In Enterprise Computer Network
Creators: name: Бизянов, Евгений Евгеньевич
name: Рыбалка, И. В.
Publisher: name: Издательский центр СурГУ
Year: 2020

description: Представлены тензорная модель учета потерь при передаче пакетов данных в компьютерной сети предприятия и обоснование целесообразности ее использования при анализе на основе тензорной методологии. Предложены формулы расчета потерь пакетов данных в узлах компьютерной сети для предприятия и его подразделений, а также для заданного пути в компьютерной сети. Приведен пример тензорной модели расчета потерь пакетов данных для текущего состояния компьютерной сети и в случае ее расширения. Показано, что изменение компьютерной сети предприятия требует модернизации только одной матрицы в модели, при этом формулы для расчета потерь остаются неизменными.
description: The article presents a tensor model for losses accounting in the transmission of data packets in a computer network of an enterprise and rationale for its use in the analysis that is based on tensor methodology. Formulas for calculating the data packets losses in the computer network nodes for an enterprise and its departments, as well as for a given path in a computer network are proposed. An example of a tensor model for calculating the data packets losses for the current state of a computer network and in the case of its expansion is given. It is shown that changing the computer network of an enterprise requires the modernization of only one matrix in the model, while the formulas for calculating losses remain unchanged.
On the chances and challenges of combining electron-collecting nPOLO and hole-collecting Al-p+ contacts in highly efficient p-type c-Si solar cells
Creators: name: Peibst, Robby
name: Haase, Felix
name: Min, Byungsul
name: Hollemann, Christina
name: Brendemühl, Till
name: Bothe, Karsten
name: Brendel, Rolf
Publisher: name: Chichester : Wiley
Year: 2022
Subjects: subject: efficiency potential
subject: passivating contacts
subject: POLO
subject: poly-Si
subject: solar cell development
subject: temperature coefficient
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: ISFH is following a distinct cell development roadmap, which comprises—as a short-term concept—the combination of an n-type doped electron-collecting poly-Si on oxide (POLO) junction with an Al-alloyed p+ junction for hole collection. This combination can be integrated either in front- and back-contacted back junction cells (POLO-BJ) or in interdigitated back-contacted cells (POLO-IBC). Here, we present recent progress with these two cell concepts. We report on a certified M2-sized 22.9% efficient POLO-BJ cell with a temperature coefficient TCη of only −(0.3 ± 0.02) %rel/K and a certified 23.7% (4 cm2 d.a.) efficient POLO-IBC cell. We discuss various specific conceptual aspects of this technology and present a simulation-based sensitivity analysis for quantities related to the quality of the hole-collecting alloyed Al-p+ junction which are subject to continuous improvement and thus hard to predict exactly. We report that the measured pseudo fill factor values decrease more due to metallization than would be expected from recombination in the metallized regions with an ideality factor of one only. The gap to pseudo fill factor values that are theoretically achievable at the respective open-circuit voltages is 1.1%abs (Ga-doped wafer) for POLO-IBC and 1.4%abs (B-doped wafer) to 2%abs (Ga-doped wafer) for POLO-BJ. With an embedded blocking layer for Ag crystallites in the poly-Si, we present a concept to reduce this gap.
THE CONTRIBUTION OF AFFECTIVE SKILLS TO FOSTER LEANER AUTONOMY IN EFL CLASSES
Creators: name: Zakirova, Zulkumor
Publisher: name: Zenodo
Year: 2023

description: This article studies concept of learner autonomy in language learning, emphasizing its role in empowering learners to take control of their educational process. The study underscores the significance of cognitive, metacognitive, and affective skills in developing and sustaining independent learning. Additionally, intertwined relationship between motivation, self-regulation, and independent learning are explored in it, emphasizing the positive correlation between motivational beliefs and effective self-regulation.
Discussion of "Objective Priors: An Introduction for Frequentists" by M. Ghosh
Creators: name: Sweeting, Trevor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Discussion of "Objective Priors: An Introduction for Frequentists" by M. Ghosh [arXiv:1108.2120]
description: Published in at http://dx.doi.org/10.1214/11-STS338B the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
A modified Möbius $μ$-function
Creators: name: Steuding, Rasa
name: Steuding, Jörn
name: Tóth, László
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A25, 11N37, 11M26

description: We investigate a modified Möbius $μ$-function which is related to an infinite product of shifted Riemann zeta-functions. We prove conditional and unconditional upper and lower bounds for its summatory function, and, finally, we discuss relations with Riemann's hypothesis.
description: 9 pages
Attitudes of high school science teachers toward departmental examinations
Creators: name: Arsenault, Kathleen Magdalen
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: LB 3054 C33 A7 1977 Microfiche
subject: Examinations - Alberta
subject: Science teachers - Alberta
subject: High school teachers - Attitudes

description: Bibliography: p. 66-70.
Structural and electronic properties of ScnOm (n=1~3, m=1~2n) clusters: Theoretical study using screened hybrid density functional theory
Creators: name: Yang, Yu
name: Liu, Haitao
name: Zhang, Ping
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: The structural and electronic properties of small scandium oxide clusters ScnOm (n = 1 - 3, m = 1 - 2n) are systematically studied within the screened hybrid density functional theory. It is found that the ground states of these scandium oxide clusters can be obtained by the sequential oxidation of small "core" scandium clusters. The fragmentation analysis demonstrates that the ScO, Sc2O2, Sc2O3, Sc3O3, and Sc3O4 clusters are especially stable. Strong hybridizations between O-2p and Sc-3d orbitals are found to be the most significant character around the Fermi level. In comparison with standard density functional theory calculations, we find that the screened hybrid density functional theory can correct the wrong symmetries and yield more precise description for the localized 3d electronic states of scandium.
description: 8 figures
Wall slip and flow of concentrated hard-sphere colloidal suspensions
Creators: name: Ballesta, P.
name: Petekidis, G.
name: Isa, L.
name: Poon, W. C. K.
name: Besseling, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a comprehensive study of the slip and flow of concentrated colloidal suspensions using cone-plate rheometry and simultaneous confocal imaging. In the colloidal glass regime, for smooth, non-stick walls, the solid nature of the suspension causes a transition in the rheology from Herschel-Bulkley (HB) bulk flow behavior at large stress to a Bingham-like slip behavior at low stress, which is suppressed for sufficient colloid-wall attraction or colloid-scale wall roughness. Visualization shows how the slip-shear transition depends on gap size and the boundary conditions at both walls and that partial slip persist well above the yield stress. A phenomenological model, incorporating the Bingham slip law and HB bulk flow, fully accounts for the behavior. Microscopically, the Bingham law is related to a thin (sub-colloidal) lubrication layer at the wall, giving rise to a characteristic dependence of slip parameters on particle size and concentration. We relate this to the suspension's osmotic pressure and yield stress and also analyze the influence of van der Waals interaction. For the largest concentrations, we observe non-uniform flow around the yield stress, in line with recent work on bulk shear-banding of concentrated pastes. We also describe residual slip in concentrated liquid suspensions, where the vanishing yield stress causes coexistence of (weak) slip and bulk shear flow for all measured rates.
Chiral molecular films as electron polarizers and polarization modulators
Creators: name: Medina, Ernesto
name: López, Floralba
name: Ratner, Mark
name: Mujica, Vladimiro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent experiments on electron scattering through molecular films have shown that chiral molecules can be efficient sources of polarized electrons even in the absence of heavy nuclei as source of a strong spin-orbit interaction. We show that self-assembled monolayers (SAMs) of chiral molecules are strong electron polarizers due to the high density effect of the monolayers and explicitly compute the scattering amplitude off a helical molecular model of carbon atoms. Longitudinal polarization is shown to be the signature of chiral scattering. For elastic scattering, we find that at least double scattering events must take place for longitudinal polarization to arise. We predict energy windows for strong polarization, determined by the energy dependences of spin-orbit strength and multiple scattering probability. An incoherent mechanism for polarization amplification is proposed, that increases the polarization linearly with the number of helix turns, consistent with recent experiments on DNA SAMs.
description: 5 Pages, 4 figures
Radiative and non-radiative effects of a substrate on localized plasmon resonance of particles
Creators: name: Venkatapathi, Murugesan
name: Tiwari, Abhay K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Experiments have shown strong effects of some substrates on the localized plasmons of metallic nano particles but they are inconclusive on the affecting parameters. Here we have used Discrete Dipole Approximation in conjunction with Sommerfeld integral relations to explain the effect of the substrates as a function of the parameters of incident radiation. The radiative coupling can both quench and enhance the resonance and its dependence on the angle and polarization of incident radiation with respect to the surface is shown. Non-radiative interaction with the substrate enhances the plasmon resonance of the particles and can shift the resonances from their free-space energies significantly. The non-radiative interaction of the substrate is sensitive to the shape of particles and polarization of incident radiation with respect to substrate. Our results show that plasmon resonances in coupled and single particles can be significantly altered from their free-space resonances and are quenched or enhanced by the choice of substrate and polarization of incident radiation.
description: 14 pages, 4 figures
First step restoration techniques in invaded grassland in southern British Columbia
Creators: name: Knopp, Angela
Publisher: name: University of British Columbia
Year: 2009

description: Invasive species are considered the second greatest threat to biodiversity (after habitat loss) as they can alter ecosystem functioning, including nutrient cycling. Invasive plant species can be controlled using various methods and restoration is often attempted in degraded areas. Biological control temporarily eliminated diffuse knapweed from a site in Vernon, British Columbia, though the site remained completely dominated by other invasive species. Restoration was attempted using seed addition of native species and late summer and spring vegetation removal of invasive species. Seed addition did not result in increased native species abundance in the plots, likely because of abnormally low April precipitation. Vegetation removal in spring did not prevent the emergence of seedlings, and actually increased emergence of diffuse knapweed and thyme-leaved sandwort. Annual grasses on the other hand were more abundant in plots without vegetation removal. Removal of vegetation in the plots was not evident by biomass harvest in August, though it significantly increased diversity and the percentage of forbs in the total biomass. The plots with no vegetation removed had significantly greater percentage of grass in the total biomass and far greater litter mass. Comparing soil samples from two invaded ecosystems (diffuse knapweed and sulphur cinquefoil dominated) to one with few invasive species (bunchgrass dominated) resulted in finding that almost all nutrient levels measured and moisture were highest in the uninvaded ecosystem. As diffuse knapweed reacts positively to the removal of competition, vegetation removal should not be used as a restoration technique in invaded areas. In areas where there is no knapweed, however, vegetation removal may be beneficial to work against dominance by annual grass species. Soils of invaded ecosystems may also need to be considered, and only vegetation that can withstand drought and low levels of nutrients should be used.
Photochemical studies of Bis(2-acetylpyrrol-1-yl) methane and related pyrroles
Creators: name: Houwen, Otto Hendrik
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: QD 401 H67 1977 Microfiche
subject: Pyrrol
subject: Photochemistry

description: Bibliography: p. 175-187.
Magnetic non-uniformity and thermal hysteresis of magnetism in a manganite thin film
Creators: name: Singh, Surendra
name: Fitzsimmons, M. R.
name: Lookman, T.
name: Thompson, J. D.
name: Jeen, H.
name: Biswas, A.
name: Roldan, M. A.
name: Varela, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We measured the chemical and magnetic depth profiles of a single crystalline (La$_{1-x}$Pr$_x$)$_{1-y}$Ca$_y$MnO$_{3-δ}$ (x = 0.52\pm0.05, y = 0.23\pm0.04, δ = 0.14\pm0.10) film grown on a NdGaO3 substrate using x-ray reflectometry, electron microscopy, electron energy-loss spectroscopy and polarized neutron reflectometry. Our data indicate that the film exhibits coexistence of different magnetic phases as a function of depth. The magnetic depth profile is correlated with a variation of chemical composition with depth. The thermal hysteresis of ferromagnetic order in the film suggests a first order ferromagnetic transition at low temperatures.
title: Измерение и статистическая обработка временных параметров пульса
title: Measurement and Statistical Processing of Pulse Time Parameters
Creators: name: Дёмко, Анатолий Ильич
name: Алмазова, Елена  Геннадьевна
name: Семенов, Олег Юрьевич
Publisher: name: Издательский центр СурГУ
Year: 2020

description: Представлен анализ параметров пульса в кардиоинтервалографии и приведено обоснование расчетов дополнительных параметров, обладающих хорошей информативностью при возможности оперативного измерения с высокой точностью. Использованы понятия и характеристики теории вероятностей и математической статистики для оценки погрешности расчетов при ограниченном времени измерений. Рассмотрен алгоритм измерения параметров пульса. Предлагаемый расчет параметров временных интервалов пульса может быть использован в клинических условиях и спорте.
description: The article presents the analysis of the pulse parameters used in cardiointervalography and justification of calculations for additional parameters, which have good informational value and are available for high-precision measurement. The concepts and characteristics of probability theory and mathematical statistics are used for the estimation of calculating errors in restricted measurement time. An algorithm for measuring pulse parameters is considered. The introduced calculation of time parameters for the pulse can be used in sports and clinical conditions.
Phase transition in the massive Gross-Neveu model in toroidal topologies
Creators: name: Khanna, F. C.
name: Malbouisson, A. P. C.
name: Malbouisson, J. M. C.
name: Santana, A. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We use methods of quantum field theory in toroidal topologies to study the $N$-component $D$-dimensional massive Gross-Neveu model, at zero and finite temperature, with compactified spatial coordinates. We discuss the behavior of the large-$N$ coupling constant ($g$), investigating its dependence on the compactification length ($L$) and the temperature ($T$). For all values of the fixed coupling constant ($λ$), we find an asymptotic-freedom type of behavior, with $g\to 0$ as $L\to 0$ and/or $T\to \infty$. At T=0, and for $λ\geq λ_{c}^{(D)}$ (the strong coupling regime), we show that, starting in the region of asymptotic freedom and increasing $L$, a divergence of $g$ appears at a finite value of $L$, signaling the existence of a phase transition with the system getting spatially confined. Such a spatial confinement is destroyed by raising the temperature. The confining length, $L_{c}^{(D)}$, and the deconfining temperature, $T_{d}^{(D)}$, are determined as functions of $λ$ and the mass ($m$) of the fermions, in the case of $D=2,3,4$. Taking $m$ as the constituent quark mass ($\approx 350\: MeV$), the results obtained are of the same order of magnitude as the diameter ($\approx 1.7 fm$) and the estimated deconfining temperature ($\approx 200\: MeV$) of hadrons.
description: 14 pages, 10 figures, 1 table, to appear in Phys. Rev. D
The Effects of stimulus discriminability and response discriminability on choice reaction time
Creators: name: Edwards, J. J. Gavin
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: BF 317 E48 1974 Microfiche
subject: Reaction time
subject: Conditioned response
subject: Senses and sensation
subject: Cognition
subject: Psychology, Physiological

description: Bibliography: p. 47-48.