cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
CHOICE OF FLEXIBLE FUNCTIONAL FORMS: REVIEW AND APPRAISAL
Creators: name: Thompson, Gary D.
name: Thompson, Gary D.
Publisher: name: Unknown
Year: 1988
Subjects: Research Methods/ Statistical Methods

description: Choice between alternative flexible functional forms has received little explicit treatment in many empirical agricultural studies. Theoretical criteria and empirical techniques for choosing between flexible functional forms are reviewed. Theoretical topics include definitions of flexibility, mathematical expansions, separability, and regular regions. Empirical techniques examined are Monte Carlo analysis, parametric modeling, bayesian inference, and nonnested hypothesis testing. Comparison of the full range of theoretical and empirical aspects may provide more credible and reliable empirical estimates when consumer or producer duality assumptions are appropriate in agricultural applications.
S3: Active volcanoes in Marie Byrd Land
Creators: name: N.W. Dunbar
name: N.A. Iverson
name: J.L. Smellie
name: W.C. McIntosh
name: M.J. Zimmerer
name: P.R. Kyle
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Argon geochronology methods and analytical spectra or ideograms.
5G is Real: Evaluating the Compliance of the 3GPP 5G New Radio System with the ITU IMT-2020 Requirements
Creators: name: Henry, Samer
name: Alsohaily, Ahmed
name: Sousa, Elvino
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The 3rd Generation Partnership Project (3GPP) submitted the 5G New Radio (NR) system specifications to International Telecommunication Union (ITU) as a candidate fifth generation (5G) mobile communication system (formally denoted as IMT-2020 systems). As part of the submission, 3GPP provided a self-evaluation for the compliance of 5G NR systems with the ITU defined IMT-2020 performance requirements. This paper considers the defined 5G use case families, Ultra Reliable Low-Latency Communication (URLLC), massive Machine Type Communication (mMTC) and enhanced Mobile Broadband (eMBB), and provides an independent evaluation of the compliance of the 3GPP 5G NR self-evaluation simulations with the IMT-2020 performance requirements for connection density, reliability, and spectral efficiency for future mobile broadband and emerging IoT applications. Independent evaluation indeed shows the compliance of the 3GPP 5G NR system with the ITU IMT-2020 performance requirements for all parameters evaluated by simulations.
description: 14 pages, 16 figures, 26 tables, IEEE Access
UNITED STATES AGRICULTURAL TRADE: WHERE ARE THE GAINS?
Creators: name: Schmitz, Andrew
name: Schmitz, Andrew
Publisher: name: Unknown
Year: 1988
Subjects: International Relations/Trade

description: This paper discusses the interface between the U.S. agricultural policy and the economic gains from exports. The theory shows that the net gains from trade after government subsidies are accounted for can be small or nonexistent. Some empirical evidence is discussed to support this claim. Policy options are presented to enhance gains from trade from U.S. exports.
சங்க இலக்கியத்தில் பண்பாட்டு விழுமியங்கள்
Creators: name: முனைவர் தி. மணிமொழி பிஎச்.டி.,
Publisher: name: figshare
Year: 2020
Subjects: subject: 200315 Indian Languages
subject: FOS: Languages and literature
subject: 200520 Indian Literature

description: தமிழ்ச்சமூகத்தின் பண்பாடு தனித்தன்மைகளைக் கொண்டதாகும். பழந்தமிழரின் பண்பாட்டு விழுமியங்களை பழந்தமிழ் இலக்கியங்கள் சான்று பகர்கின்றன. தன் இனத்தை மட்டுமின்றி தன் சுற்றுச்சூழலான இயற்கை மீதும் மிகுந்த பற்றுதல் கொண்டவர்கள் தமிழர்களாவர். தமிழரின் பண்பாட்டு விழுமியங்கள் காதல், ஈகை, நாகரிகம் என பரந்து விரிந்துள்ளன.
Degenerate lower-dimensional tori under the Bryuno condition
Creators: name: Gentile, Guido
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J40, 37C55, 70K43, 70H08

description: We study the problem of conservation of maximal and lower-dimensional invariant tori for analytic convex quasi-integrable Hamiltonian systems. In the absence of perturbation the lower-dimensional tori are degenerate, in the sense that the normal frequencies vanish, so that the tori are neither elliptic nor hyperbolic. We show that if the perturbation parameter is small enough, for a large measure subset of any resonant submanifold of the action variable space, under some generic non-degeneracy conditions on the perturbation function, there are lower-dimensional tori which are conserved. They are characterised by rotation vectors satisfying some generalised Bryuno conditions involving also the normal frequencies. We also show that, again under some generic assumptions on the perturbation, any torus with fixed rotation vector satisfying the Bryuno condition is conserved for most values of the perturbation parameter in an interval small enough around the origin. According to the sign of the normal frequencies and of the perturbation parameter the torus becomes either hyperbolic or elliptic or of mixed type.
description: 30 pages
A CRITIQUE OF THE CONSTANT ELASTICITY OF TRANSFORMATION (CET) LINEAR SUPPLY SYSTEM
Creators: name: Shumway, C. Richard
name: Powell, Alan A.
name: Shumway, C. Richard
name: Powell, Alan A.
Publisher: name: Unknown
Year: 1984
Subjects: Research Methods/ Statistical Methods

description: An elusive restriction maintained in earlier CET supply models with three or more products is shown to result in a potentially serious misspecification. Its impact on empirical estimates is found to be substantial, and an alternative formulation is presented which overcomes the problem while still maintaining the CET hypothesis.
A superconducting switch actuated by injection of high energy electrons
Creators: name: Ritter, M. F.
name: Fuhrer, A.
name: Haxell, D. Z.
name: Hart, S.
name: Gumann, P.
name: Riel, H.
name: Nichele, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Fast cryogenic switches with ultra-low power dissipation are highly sought-after for control electronics of quantum computers, space applications and next generation logic circuits. However, existing high-frequency switches are often bulky, lossy or require large source-drain and gate currents for operation, making them unsuitable for many applications and difficult to interface to semiconducting devices. Here we present an electrically controlled superconducting switch based on a metallic nanowire. Transition from superconducting to resistive state is realized by tunneling of high-energy electrons from a gate contact through an insulating barrier. Operating gate currents are several orders of magnitude smaller than the nanowire critical source-drain current, effectively resulting in a voltage-controlled device. This superconducting switch is fast, self-resets from normal to superconducting state, and can operate in large magnetic fields, making it an ideal component for low-power cryogenic applications and quantum computing architectures.
FARMLAND PRICE BEHAVIOR AND CREDIT ALLOCATION
Creators: name: Shalit, Haim
name: Schmitz, Andrew
name: Shalit, Haim
name: Schmitz, Andrew
Publisher: name: Unknown
Year: 1984
Subjects: Agricultural Finance
Land Economics/Use

description: A model of farmland accumulation analyzes the impact of credit allocation and the level of debt on farmland prices. The model stresses the importance of the real net wealth accumulated by the farming sector on the lending procedures for farmland purchases. It is shown that credit allocated on the basis of wealth not only increases farmland prices but also destabilizes them. The paper presents the model of individual accumulation to derive the farmland price equation whose dynamic properties are analyzed. A study of U.S. farmland data supports the theoretical results.
Anomalous scaling of low-order structure functions of turbulent velocity
Creators: name: Chen, S. Y.
name: Dhruva, B.
name: Kurien, S.
name: Sreenivasan, K. R.
name: Taylor, M. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: It is now believed that the scaling exponents of moments of velocity increments are anomalous, or that the departures from Kolmogorov's (1941) self-similar scaling increase nonlinearly with the increasing order of the moment. This appears to be true whether one considers velocity increments themselves or their absolute values. However, moments of order lower than 2 of the absolute values of velocity increments have not been investigated thoroughly for anomaly. Here, we discuss the importance of the scaling of non-integer moments of order between +2 and -1, and obtain them from direct numerical simulations at moderate Reynolds numbers (Taylor microscale Reynolds numbers $R_λ\le$ 450) and experimental data at high Reynolds numbers ($R_λ\approx$ 10,000). The relative difference between the measured exponents and Kolmogorov's prediction increases as the moment order decreases towards -1, thus showing that the anomaly that is manifest in high-order moments is present in low-order moments as well. This conclusion provides a motivation for seeking a theory of anomalous scaling as the order of the moment vanishes. Such a theory does not have to consider rare events--which may be affected by non-universal features such as shear--and so may be regarded as advantageous to consider and develop.
description: 10 pages, 5 figures, submitted to Journal of Fluid Mechanics
கபிலர் பாடல்களில் கூற்றுகள்
Creators: name: முனைவர் தி. மணிமொழி பிஎச்.டி.,
Publisher: name: figshare
Year: 2020
Subjects: subject: 200315 Indian Languages
subject: FOS: Languages and literature
subject: 200520 Indian Literature

description: தொல்காப்பியர் குறிப்பிடும் கூற்றுக்குரியோர்களை கபிலர் தம் குறிஞ்சித்திணைப் பாடல்களில் அமைத்துள்ளார். கூற்று நிகழும் இடமும் சூழலும் முதன்மையானதை கபிலர் பாடல்கள் வழி அறியலாம். வெவ்வேறு சூழலில் கூற்றுக்குரியவர்களின் மன உணர்வுகள் வெவ்வேறாய் வெளிப்படுகின்றன. தலைவியாகிய பெண்ணின் மன உணர்வு நிலையிலிருந்து கபிலர் பாடியுள்ள தன்மை அவரின் கருத்துப்புலப்பாட்டுத் திறனுக்குச் சான்றாக அமைகின்றது.
Magnetic quivers for rank 1 theories
Creators: name: Bourget, Antoine
name: Grimminger, Julius F.
name: Hanany, Amihay
name: Sperling, Marcus
name: Zafrir, Gabi
name: Zhong, Zhenghao
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Magnetic quivers and Hasse diagrams for Higgs branches of rank 1 $4d$ $\mathcal{N}=2$ SCFTs are provided. These rank 1 theories fit naturally into families of higher rank theories, originating from higher dimensions, which are addressed.
CLASSIFICATION OF RISK PREFERENCES WITH ELICITED UTILITY DATA: DOES FUNCTIONAL FORM MATTER?
Creators: name: Musser, Wesley N.
name: Wetzstein, Michael E.
name: Reece, Susan Y.
name: Musser, Lynn M.
name: Varca, Philip E.
name: Chou, Charlene C.J.
name: Musser, Wesley N.
name: Wetzstein, Michael E.
name: Reece, Susan Y.
name: Musser, Lynn M.
name: Varca, Philip E.
name: Chou, Charlene C.J.
Publisher: name: Unknown
Year: 1984
Subjects: Research Methods/ Statistical Methods

description: Recently, several problems with elicited utility functions have emerged. This paper concerns a fundamental problem in risk preference classification with elicited data. For the sample in this research, different functional forms resulted in reversals in preference classifications. This paper suggests that preference classifications must be interpreted with caution.
HLVU : A New Challenge to Test Deep Understanding of Movies the Way Humans do
Creators: name: Curtis, Keith
name: Awad, George
name: Rajput, Shahzad
name: Soboroff, Ian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper we propose a new evaluation challenge and direction in the area of High-level Video Understanding. The challenge we are proposing is designed to test automatic video analysis and understanding, and how accurately systems can comprehend a movie in terms of actors, entities, events and their relationship to each other. A pilot High-Level Video Understanding (HLVU) dataset of open source movies were collected for human assessors to build a knowledge graph representing each of them. A set of queries will be derived from the knowledge graph to test systems on retrieving relationships among actors, as well as reasoning and retrieving non-visual concepts. The objective is to benchmark if a computer system can "understand" non-explicit but obvious relationships the same way humans do when they watch the same movies. This is long-standing problem that is being addressed in the text domain and this project moves similar research to the video domain. Work of this nature is foundational to future video analytics and video understanding technologies. This work can be of interest to streaming services and broadcasters hoping to provide more intuitive ways for their customers to interact with and consume video content.
ESTIMATION OF MODAL DEMAND ELASTICITIES IN GRAIN TRANSPORTATION
Creators: name: Wilson, William W.
name: Wilson, William W.
Publisher: name: Unknown
Year: 1984
Subjects: Demand and Price Analysis
Public Economics

description: Recent legislation in the transportation industry has stimulated a move toward more flexibility in railroad pricing and has consequently provided the impetus for the analysis of transportation demand. Modal demands for grain transportation are analyzed in this paper using a derived demand approach assuming dual relationships between production and cost functions of shippers' distribution activities. Hypotheses were introduced in the empirical specification about the effects of rail car shortages and the introduction of multiple-car rail rates. The model was estimated and hypotheses tested in the case of eastbound wheat and barley shipments form North Dakota.
Optical conductivity of unconventional charge density wave systems: Role of vertex corrections
Creators: name: Aristov, D. N.
name: Zeyher, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The optical conductivity of a d-CDW conductor is calculated for electrons on a square lattice and a nearest-neighbor charge-charge interaction using the lowest-order conserving approximation. The spectral properties of the Drude-like peak at low frequencies and the broad hump due to transitions across the gap at large frequencies are discussed, also as a function of temperature and of the second-nearest neighbor hopping term t'. We find that vertex corrections enhance the d.c. conductivity, make the Drude peak narrower and provide a smooth transition from a renormalized regime at low to the bare theory at high frequencies. It is also shown that vertex corrections enhance the temperature dependence of the restricted optical sum leading to a non-negligible violation of the sum rule in the d-CDW state.
description: 10 pages, 6 figures
Hoiho tracking: 20 June - 22 July 2020
Creators: name: Mattern, Thomas
name: Young, Melanie
Publisher: name: figshare
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60201 Behavioural Ecology
subject: 60205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
subject: 60207 Population Ecology
subject: Marine Biology

description: Winter tracking of hoiho proves to be challenging once again. At two sites only five birds could be captured to attach tracking devices in the past month. While four of these birds could be recaptured within 1-2 weeks after deployment, the fifth bird still eludes recapture despite daily monitoring of the colony for the past two weeks. This report contains data for four deployments. Birds from Long Point/Catlins showed foraging behaviour not dissimilar to what we observed during the post-guard stage of the last breeding season almost half a year ago (see February 2020 report). Same is true for data obtained from two birds at Bobby’s Head/Tavora Reserve both of which foraged in similar regions as birds during the pre-moult as well as the breeding period. Remarkably, these two birds foraged cooperatively for at least the first four trips recorded. No GPS data was recorded for the last three trips in one bird; however, similar dive profiles suggest that the two penguins foraged in tandem for the duration of the device deployments.
CC chemokine ligand 5/RANTES chemokine antagonists aggravate glomerulonephritis despite reduction of glomerular leukocyte infiltration
Creators: name: Anders, Hans-Joachim
name: Frink, Michael
name: Linde, Yvonne
name: Banas, Bernhard
name: Wörnle, Markus
name: Cohen, Clemens D.
name: Vielhauer, Volker
name: Nelson, Peter J.
name: Gröne, Hermann-Josef
name: Schlöndorff, Detlef
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 610 Medizin

description: The chemokine CC chemokine ligand (CCL)5/RANTES as well as its respective receptor CCR5 mediate leukocyte infiltration during inflammation and are up-regulated early during the course of glomerulonephritis (GN). We tested the effects of the two CCL5/RANTES blocking analogs, Met-RANTES and amino-oxypentane-RANTES, on the course of horse apoferritin (HAF)-induced GN. HAF-injected control mice had proliferative GN with mesangial immune complex deposits of IgG and HAF. Daily i.p. injections of Met-RANTES or amino-oxypentane-RANTES markedly reduced glomerular cell proliferation and glomerular macrophage infiltration, which is usually associated with less glomerular injury and proteinuria in HAF-GN. Surprisingly, however, HAF-GN mice treated with both analogs showed worse disease with mesangiolysis, capillary obstruction, and nephrotic range albuminuria. These findings were associated with an enhancing effect of the CCL5/RANTES analogs on the macrophage activation state, characterized by a distinct morphology and increased inducible NO synthetase expression in vitro and in vivo, but a reduced uptake of apoptotic cells in vivo. The humoral response and the Th1/Th2 balance in HAF-GN and mesangial cell proliferation in vitro were not affected by the CCL5/RANTES analogs. We conclude that, despite blocking local leukocyte recruitment, chemokine analogs can aggravate some specific disease models, most likely due to interactions with systemic immune reactions, including the removal of apoptotic cells and inducible NO synthetase expression.
Demonstrating Immersive Media Delivery on 5G Broadcast and Multicast Testing Networks
Creators: name: Mi, De
name: Eyles, Joe
name: Jokela, Tero
name: Petersen, Swen
name: Odarchenko, Roman
name: Ozturk, Ece
name: Chau, Duy-Kha
name: Tran, Tuan
name: Turnbull, Rory
name: Kokkinen, Heikki
name: Altman, Baruch
name: Bot, Menno
name: Ratkaj, Darko
name: Renner, Olaf
name: Gomez-Barquero, David
name: Gimenez, Jordi Joan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: This work presents eight demonstrators and one showcase developed within the 5G-Xcast project. They experimentally demonstrate and validate key technical enablers for the future of media delivery, associated with multicast and broadcast communication capabilities in 5th Generation (5G). In 5G-Xcast, three existing testbeds: IRT in Munich (Germany), 5GIC in Surrey (UK), and TUAS in Turku (Finland), have been developed into 5G broadcast and multicast testing networks, which enables us to demonstrate our vision of a converged 5G infrastructure with fixed and mobile accesses and terrestrial broadcast, delivering immersive audio-visual media content. Built upon the improved testing networks, the demonstrators and showcase developed in 5G-Xcast show the impact of the technology developed in the project. Our demonstrations predominantly cover use cases belonging to two verticals: Media & Entertainment and Public Warning, which are future 5G scenarios relevant to multicast and broadcast delivery. In this paper, we present the development of these demonstrators, the showcase, and the testbeds. We also provide key findings from the experiments and demonstrations, which not only validate the technical solutions developed in the project, but also illustrate the potential technical impact of these solutions for broadcasters, content providers, operators, and other industries interested in the future immersive media delivery.
description: 16 pages, 22 figures, IEEE Trans. Broadcasting
Bacterial CpG-DNA aggravates immune complex glomerulonephritis: role of TLR9-mediated expression of chemokines and chemokine receptors
Creators: name: Anders, Hans-Joachim
name: Banas, Bernhard
name: Linde, Yvonne
name: Weller, Lars
name: Cohen, Clemens D.
name: Kretzler, Matthias
name: Martin, Stefan
name: Vielhauer, Volker
name: Schlöndorff, Detlef
name: Gröne, Hermann-Josef
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 610 Medizin

description: Immune complex glomerulonephritis (GN) often deteriorates during infection with viruses and bacteria that, in contrast to mammals, have DNA that contains many unmethylated CpG motifs. Balb/c mice with horse apoferritin-induced GN (HAF-GN) were treated with either saline, CpG-oligodeoxynucleotides (ODN), or control GpC-ODN. Only CpG-ODN exacerbated HAF-GN with an increase of glomerular macrophages, which was associated with massive albuminuria and increased renal MCP-1/CCL2, RANTES/CCL5, CCR1, CCR2, and CCR5 mRNA expression. CpG-ODN induced a Th1 response as indicated by serum anti-HAF IgG(2a) titers, mesangial IgG(2a) deposits, and splenocyte IFN-gamma secretion. Messenger RNA for the CpG-DNA receptor Toll-like reeptor 9 (TLR9) was present in kidneys with HAF-GN but not in normal kidneys. The source of TLR9 mRNA in HAF-GN could be infiltrating macrophages or intrinsic renal cells, e.g., mesangial cells; but, in vitro, only murine J774 macrophages expressed TLR9. In J774 cells, CpG-ODN induced the chemokines MCP-1/CCL2 and RANTES/CCL5 and the chemokine receptors CCR1 and CCR5. It is concluded that CpG-DNA can aggravate preexisting GN via a shift toward a Th1 response but also by a novel pathway involving TLR9-mediated chemokine and chemokine receptor expression by macrophages, which may contribute to the enhanced glomerular macrophage recruitment and activation. This mechanism may be relevant during infection-triggered exacerbation of human immune-complex GN and other immune-mediated diseases in general.
Ethnic elders’ narratives and responses to culture tales : a study of culture and reminiscence
Creators: name: Stewart, Katherine Glenna
Publisher: name: University of British Columbia
Year: 2009

description: This qualitative study of older adults of differing ethnocultural backgrounds explored the influence of culture on reminiscence. Specifically, the study examined the ways in which participants constructed their reminiscences by examining how culture is expressed in reminiscence and how each elder responds to a story specific to his or her culture. The research design of narrative analysis was chosen for its suitability to studying personal meaning in stories such as those told in reminiscence. The method of narrative analysis used was the construction of an Adequate Paraphrase (AP) because it allowed the analyst to extract the essence of a story from the structure of narrative text, and to see the connection between this essence and cultural meaning. Original interviews were obtained from four individuals and secondary analysis was performed on transcripts obtained from three pilot study participants. Several key findings were discovered. First, an elder can express the fluid and reciprocal relationship between culture and identity in reminiscing on his or her life. Second, AP interpretations offer only a partial understanding of an elder's reminiscence, possibly in relation to varying levels of representation of narrative. Third, the purpose of construction of a particular reminiscence appears to be to direct the use of structural devices in order to present the reminiscer as one who has acted reasonably and congruently with his or her values. Insights on cultural expression in reminiscence were discussed and used to propose a tentative outline of reminiscence construction involving content, structure, purpose and formulation. Each of these aspects appears to relate to particular theoretical perspectives on reminiscence. Thus, while no single perspective accounts for all of reminiscence construction, certain perspectives may be more applicable to certain aspects of construction. A key implication of this study is that by engaging diverse elders in reminiscence, one may promote identity integration, search for life meaning, understanding of meaning in context, accessing memory and communicating meaning. In turn, such engagement in reminiscence may promote quality health care in the face of diversity.
PREDICTING THE IMPACT OF NEW CROPPING PRACTICES UPON SUBSISTENCE FARMING: A FARM LEVEL ANALYSIS IN BRAZIL
Creators: name: Brandao, Elizabeth Santos
name: McCarl, Bruce A.
name: Schuh, G. Edward
name: Brandao, Elizabeth Santos
name: McCarl, Bruce A.
name: Schuh, G. Edward
Publisher: name: Unknown
Year: 1984
Subjects: Crop Production/Industries

description: An analysis is done on the potential effects of several improved cropping practices in a subsistence agricultural farming system along with analyses of other development options. The farming system is modeled as a linear programming model. The problem involves mixture of perennials and annuals, sharecropping provisions and risk. The practices are found to have differential effects on the distribution of income between the landlords and tenants, marketable surplus and on farm employment.
Multilinear Algebra for Minimum Storage Regenerating Codes
Creators: name: Duursma, Iwan
name: Wang, Hsin-Po
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Commutative Algebra (math.AC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94B27 (Primary) 15A69 (Secondary)

description: An $(n, k, d, α)$-MSR (minimum storage regeneration) code is a set of $n$ nodes used to store a file. For a file of total size $kα$, each node stores $α$ symbols, any $k$ nodes recover the file, and any $d$ nodes can repair any other node via each sending out $α/(d-k+1)$ symbols. In this work, we explore various ways to re-express the infamous product-matrix construction using skew-symmetric matrices, polynomials, symmetric algebras, and exterior algebras. We then introduce a multilinear algebra foundation to produce $\bigl(n, k, \frac{(k-1)t}{t-1}, \binom{k-1}{t-1}\bigr)$-MSR codes for general $t\geq2$. At the $t=2$ end, they include the product-matrix construction as a special case. At the $t=k$ end, we recover determinant codes of mode $m=k$; further restriction to $n=k+1$ makes it identical to the layered code at the MSR point. Our codes' sub-packetization level---$α$---is independent of $n$ and small. It is less than $L^{2.8(d-k+1)}$, where $L$ is Alrabiah--Guruswami's lower bound on $α$. Furthermore, it is less than other MSR codes' $α$ for a subset of practical parameters. We offer hints on how our code repairs multiple failures at once.
description: 36 pages, 9 figures, 3 tables
Region Operators of Wigner Function: Transformations, Realizations and Bounds
Creators: name: Ellinas, Demosthenes
name: Tsohantjis, Ioannis
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An integral of the Wigner function of a wavefunction |psi >, over some region S in classical phase space is identified as a (quasi) probability measure (QPM) of S, and it can be expressed by the |psi > average of an operator referred to as the region operator (RO). Transformation theory is developed which provides the RO for various phase space regions such as point, line, segment, disk and rectangle, and where all those ROs are shown to be interconnected by completely positive trace increasing maps. The latter are realized by means of unitary operators in Fock space extended by 2D vector spaces, physically identified with finite dimensional systems. Bounds on QPMs for regions obtained by tiling with discs and rectangles are obtained by means of majorization theory.
description: 16 pages, 4 figures. Hurst Bracken Festschrift, Reports of Mathematical Physics, Feb 2006, to appear
Non-Hermitian and Zeno limit of quantum systems under rapid measurements
Creators: name: Thiel, Felix
name: Kessler, David A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate in depth the relation between the first detection time of an isolated quantum system that is repeatedly perturbed by strong local measurements with a large fixed frequency $1/τ$, determining whether it is in some given state $| ψ_\text{d} \rangle$, and the time of absorption to the same state of the same system with the added imaginary potential $2i\hbar | ψ_\text{d} \rangle \langle ψ_\text{d} | / τ$. As opposed to previous works, we compare directly the solutions of both problems in the small $τ$, i.e., Zeno, limit. We find a scaling collapse in $F(t)$ with respect to $τ$ and compute the total detection probability as well as the moments of the first detection time probability density $F(t)$ in the Zeno limit. We show that both solutions approach the same result in this small $τ$ limit, as long as the initial state $| ψ_\text{in} \rangle$ is not parallel to the detection state, i.e. as long as $| \langle ψ_\text{d} | ψ_\text{in} \rangle | < 1$. However, when this condition is violated, the small probability density to detect the state on time scales much larger than $τ$ is precisely a factor of four different for all such times. We express the solution of the Zeno limit of both problems formally in terms of an electrostatic analogy. Our results are corroborated with numerical simulations.
description: 22 pages, 8 Figures
Minimum information about tolerogenic antigen-presenting cells (MITAP): a first step towards reproducibility and standardisation of cellular therapies
Creators: name: Lord, Phillip
name: Spiering, Rachel
name: Aguillon, Juan C.
name: Anderson, Amy E.
name: Appel, Silke
name: Benitez-Ribas, Daniel
name: ten Brinke, Anja
name: Broere, Femke
name: Cools, Nathalie
name: Cuturi, Maria Cristina
name: Diboll, Julie
name: Geissler, Edward K.
name: Giannoukakis, Nick
name: Gregori, Silvia
name: van Ham, S. Marieke
name: Lattimer, Staci
name: Marshall, Lindsay
name: Harry, Rachel A.
name: Hutchinson, James A.
name: Isaacs, John D.
name: Joosten, Irma
name: van Kooten, Cees
name: Lopez Diaz de Cerio, Ascension
name: Nikolic, Tatjana
name: Oral, Haluk Barbaros
name: Sofronic-Milosavljevic, Ljiljana
name: Ritter, Thomas
name: Riquelme, Paloma
name: Thomson, Angus W.
name: Trucco, Massimo
name: Vives-Pi, Marta
name: Martinez-Caceres, Eva M.
name: Hilkens, Catharien M. U.
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: DENDRITIC CELLS; DISEASE; Cell therapy; Minimum information model; Antigen-presenting cells; Autoimmune disease; Transplantation; Tolerogenic dendritic cells; Regulatory macrophages; Reporting guidelines
subject: 610 Medizin

description: Cellular therapies, with tolerogenic antigen-presenting cells (tolAPC) show great promise for the treatment of autoimmune diseases and for the prevention of destructive immune responses after transplantation The methodologies for generating tolAPC vary greatly between different laboratories, making it difficult to compare data from different studies; thus constituting a major hurdle for the development of standardised tolAPC therapeutic products. Here we describe an initiative by members of the tolAPC field to generate a minimum information model for tolAPC (MITAP), providing a reporting framework that will make differences and similarities between tolAPC products transparent. In this way, MITAP constitutes a first but important step towards the production of standardised and reproducible tolAPC for clinical application.
The DEEP Groth Strip Galaxy Redshift Survey. VIII. The Evolution of Luminous Field Bulges at Redshift z ~ 1
Creators: name: Koo, David C.
name: Simard, Luc
name: Willmer, Christopher N. A.
name: Gebhardt, Karl
name: Bouwens, Rychard J.
name: Kauffmann, Guinevere
name: Crosby, Timothy
name: Faber, S. M.
name: Sarajedini, Vicki L.
name: Vogt, Nicole P.
name: Weiner, Benjamin J.
name: Phillips, A. C.
name: Im, Myungshin
name: Wu, K. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a sample of over 50 luminous field bulges (including ellipticals) found in the Groth Strip Survey (GSS), with 0.73< z < 1.04 and with bulge magnitudes I <= 23. The exponential disk light is removed via decomposition of HST images using GIM2D. We find that 85% of these bulges are nearly as red as local E/S0's and have a shallow slope and a small color dispersion in the color-luminosity relation, suggesting roughly coeval formation. The surface brightnesses of these bulges are about 1 mag higher than local bulges. These results are explained adopting a "drizzling" scenario where a metal-rich early formation is later polluted by small amounts of additional star formation. Almost all disks have the same or bluer colors than their accompanying bulges, regardless of the bulge-disk ratio and bulge luminosity, as expected from semi-analytic hierarchical galaxy formation models. We present evidence that the few blue bulge candidates are not likely to be genuine blue ellipticals or bulges. Our deeper, more extensive, and less disk-contaminated observations challenge prior claims that 30% to 50% of field bulges or ellipticals are in a blue, star-forming phase at z < 1. We conclude that field bulges and ellipticals at z ~ 1, like luminous early- type cluster galaxies at the same redshift, are already dominated by metal-rich, old stellar populations that have been fading from a formation epoch earlier than z ~ 1.5. (abridged)
description: ApJS accepted, 106 pages, 10 figures. Figure 14 in JPEG format. Full version available at http://deep.ucolick.org/publications.html
தொல்காப்பியக் கற்பியலில் கூற்றுகளின் வகைப்பாடு
Creators: name: முனைவர் தி. மணிமொழி பிஎச்.டி.,
Publisher: name: figshare
Year: 2020
Subjects: subject: 200315 Indian Languages
subject: FOS: Languages and literature
subject: 200520 Indian Literature

description: தமிழ் இலக்கிய வரலாற்றின் தொடக்கமாக அமைவது தொல்காப்பியமாகும். தொல்காப்பியக் கற்பியலின் கூற்றுகள் வழி அகமாந்தர்களின் உள்ளத்து உணர்வுகள் வெளிப்படுகின்றன. அக்கூற்றுகளில் அகமாந்தர்கள் என்று மக்களை மையப்படுத்தியும் கூடல், ஊடல், பிரிவு, வாயில்கள் என நிகழ்வுகளை மையப்படுத்தியும் அமையும் வகைப்பாடுகளை இக்கட்டுரை ஆராய்கிறது.
Expression of X-linked retinoschisis protein RS1 in photoreceptor and bipolar cells
Creators: name: Molday, L. L.
name: Hicks, D.
name: Sauer, C. G.
name: Weber, Bernhard H. F.
name: Molday, R. S.
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: 610 Medizin

description: purpose. To examine the biochemical properties, cell expression, and localization of RS1, the product of the gene responsible for X-linked juvenile retinoschisis. methods. Rs1h mRNA expression was measured from the eyes of wild-type and rd/rd mice by Northern blot analysis and reverse transcription–polymerase chain reaction (RT-PCR). Specific antibodies raised against the N terminus of RS1 were used as probes to examine the properties and distribution of RS1 in retina, retinal cell cultures, and transfected COS-1 cells by Western blot analysis and immunofluorescence microscopy. results. Rs1h mRNA expression was detected in the retina of postnatal day (P)11 and adult CD1 mice, but not homozygous rd/rd mice by Northern blot analysis. However, Rs1h expression was detected in rd/rd mice by RT-PCR. RS1 migrated as a single 24-kDa polypeptide under disulfide-reducing conditions and a larger complex (>95 kDa) under nonreducing conditions in the membrane fraction of retinal tissue homogenates and transfected COS-1 cells. RS1 antibodies specifically stained rod and cone photoreceptors and most bipolar cells, but not Müller cells, ganglion cells, or the inner limiting membrane of adult and developing retina as revealed in double-labeling studies. RS1 antibodies also labeled retinal bipolar cells of photoreceptorless mice and retinal bipolar cells grown in cell culture. conclusions. RS1 is expressed and assembled in photoreceptors of the outer retina and bipolar cells of the inner retina as a disulfide-linked oligomeric protein complex. The secreted complex associates with the surface of these cells, where it may function as a cell adhesion protein to maintain the integrity of the central and peripheral retina.
Online Instructor Voices: A Qualitative Study on Perceptions of Practice
Creators: name: Myers, Michael
name: Sistek-Chandler, Cynthia
name: Ritika Bhawal
Publisher: name: figshare
Year: 2020
Subjects: subject: 130306 Educational Technology and Computing
subject: FOS: Educational sciences

description: This study presents a qualitative analysis of data to help understand online teacher presence, self-perceptions, and experiences of faculty who are teaching online at a large adult learner University. Online programs have been designed to facilitate high quality teaching for this population by combining elements of both synchronous and asynchronous instruction. In this study, instructors were asked to describe their online teacher presence and experiences. Focus groups were conducted with faculty participants online to capture their voices. Transcripts from participants’ comments were analyzed qualitatively using a phenomenological method of inquiry. This analysis resulted in a narrative integration of significant statements, formulated meanings, and a cluster of themes. Themes centered around being present, making a positive impact, establishing connections with students, and related a sense of power through interactive dynamics. These themes described behaviors that resulted in empowerment of faculty online presence and a pathway to teacher presence in online instruction.
Laurent series expansion of a class of massive scalar one-loop integrals up to ${\cal O}(\ep^2)$ in terms of multiple polylogarithms
Creators: name: Körner, J. G.
name: Merebashvili, Z.
name: Rogal, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a recent paper we have presented results for a set of massive scalar one-loop master integrals needed in the NNLO parton model description of the hadroproduction of heavy flavors. The one--loop integrals were evaluated in $n=4-2\ep$ dimension and the results were presented in terms of a Laurent series expansion up to ${\cal O}(\ep^2)$. We found that some of the $\ep^2$ coefficients contain a new class of functions which we termed the $L$ functions. The $L$ functions are defined in terms of one--dimensional integrals involving products of logarithm and dilogarithm functions. In this paper we derive a complete set of algebraic relations that allow one to convert the $L$ functions of our previous approach to a sum of classical and multiple polylogarithms. Using these results we are now able to present the $\ep^2$ coefficients of the one-loop master integrals in terms of classical and multiple polylogarithms.
description: 32 pages, Latex, references added, matches published version
Assessing gravitational-wave binary black hole candidates with Bayesian odds
Creators: name: Pratten, Geraint
name: Vecchio, Alberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gravitational waves from the coalescence of binary black holes can be distinguished from noise transients in a detector network through Bayesian model selection by exploiting the coherence of the signal across the network. We present a Bayesian framework for calculating the posterior probability that a signal is of astrophysical origin, agnostic to the specific search strategy, pipeline or search domain with which a candidate is identified. We apply this framework under \textit{identical} assumptions to all events reported in the LIGO-Virgo GWTC-1 catalog, GW190412 and numerous event candidates reported by independent search pipelines by other authors. With the exception of GW170818, we find that all GWTC-1 candidates, and GW190412, have odds overwhelmingly in favour of the astrophysical hypothesis, including GW170729, which was assigned significantly different astrophysical probabilities by the different search pipelines used in GWTC-1. GW170818 is de-facto a single detector trigger, and is therefore of no surprise that it is disfavoured as being produced by an astrophysical source in our framework. We find \textit{three} additional event candidates, GW170121, GW170425 and GW170727, that have significant support for the astrophysical hypothesis, with a probability that the signal is of astrophysical origin of 0.53, 0.74 and 0.64 respectively. We carry out a hierarchical population study which includes these three events in addition to those reported in GWTC-1, finding that the main astrophysical results are unaffected.
description: 23 pages, 11 figures, comments and feedback welcome!
Impurity scattering and quantum confinement in giant magnetoresistance systems
Creators: name: Zahn, Peter
name: Binder, Jörg
name: Mertig, Ingrid
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ab initio calculations for the giant magnetoresistance (GMR) in Co/Cu, Fe/Cr, and Fe/Au multilayers are presented. The electronic structure of the multilayers and the scattering potentials of point defects therein are calculated self-consistently. Residual resistivities are obtained by solving the quasi-classical Boltzmann equation including the electronic structure of the layered system, the anisotropic scattering cross sections derived by a Green's function method and the vertex corrections. Furthermore, the influence of scattering centers at the interfaces and within the metallic layers is incorporated by averaging the scattering cross sections of different impurities at various sites. An excellent agreement of experimental and theoretical results concerning the general trend of GMR in Co/Cu systems depending on the type and the position of impurities is obtained. Due to the quantum confinement in magnetic multilayers GMR can be tailored as a function of the impurity position. In Co/Cu and Fe/Au systems impurities in the magnetic layer lead to high GMR values, whereas in Fe/Cr systems defects at the interfaces are most efficient to increase GMR.
description: 8 pages, 6 figures
Comment on "Observation of annual modulation by $γ$ rays from ($α$,$γ$) reactions at the Soudan Underground Laboratory"
Creators: name: Mohr, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Tiwari {\it et al.}\ have identified an annual modulation of the $γ$-ray flux at the Soudan Underground Laboratory which is strongly correlated to the radon concentration. The $γ$-ray flux results from ($α$,$γ$) reactions which are induced by the $α$ activity of radon and its daughters. Unfortunately, the quantitative analysis of the $γ$-ray flux is based on unrealistic ($α$,$γ$) cross sections, and thus the calculated $γ$-ray fluxes are not reliable.
description: 3 pages, 1 figure; Phys. Rev. C, accepted for publication
The Causal Closure of Physics in Real World Contexts
Creators: name: Ellis, George F R
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: The causal closure of physics is usually discussed in a context free way. Here I discuss it in the context of engineering systems and biology, where strong emergence takes place due to a combination of upwards emergence and downwards causation [Ellis 2020]. Firstly, I show that causal closure is strictly limited in terms of spatial interactions because these are cases that are of necessity strongly interacting with the environment. Effective Spatial Closure holds ceteris parabus, and can be violated by Black Swan Events. Secondly, I show that causal closure in the hierarchy of emergence is a strictly interlevel affair, and in the cases of engineering and biology encompasses all levels from the social level to the particle physics level. However Effective Causal Closure can usefully be defined for a restricted set of levels, and one can experimentally determine Effective Theories that hold at each level. This does not however imply those effective theories are causally complete by themselves. In particular, the particle physics level is not causally complete by itself in the contexts of solid state physics (because of interlevel wave-particle duality), digital computers (where algorithms determine outcomes), or biology (because of time dependent constraints). Furthermore Inextricably Intertwined Levels occur in all these contexts.
description: 43 pages, 4 tables. Small addition (section 5.3). Appendix deleted
Automatic Discourse Segmentation: Review and Perspectives
Creators: name: da Cunha, Iria
name: Torres-Moreno, Juan-Manuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Multilingual discourse parsing is a very prominent research topic. The first stage for discourse parsing is discourse segmentation. The study reported in this article addresses a review of two on-line available discourse segmenters (for English and Portuguese). We evaluate the possibility of developing similar discourse segmenters for Spanish, French and African languages.
description: 5 pages, 1 figure
The contribution of rotational velocity to the FP of elliptical galaxies
Creators: name: Riciputi, A.
name: Lanzoni, B.
name: Bonoli, S.
name: Ciotti, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The contribution of ordered rotation to the observed tilt and thickness of the Fundamental Plane of elliptical galaxies is studied by means of oblate, two-integrals cuspy galaxy models with adjustable flattening, variable amount of ordered rotational support, and possible presence of a dark matter halo and of a central super-massive black hole. We find that, when restricting the measure of the velocity dispersion to the central galactic regions, rotation has a negligible effect, and so cannot be responsible of the observed tilt. However, streaming velocity effect can be significant when observing small and rotationally supported galaxies through large (relative) aperture (as for example in Fundamental Plane studies at high redshift), and can lead to unrealistically low mass-to-light ratios. The effect of a central supermassive black hole on the kinematical fields, and the models position in the v/sigma-ellipticity plane are also discussed.
description: 10 pages, 4 figures, accepted by A&A