cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
VCP/p97 UFMylation stabilizes BECN1 and facilitates the initiation of autophagy
Creators: name: Wang, Zhifeng
name: Xiong, Shuhui
name: Wu, Zhaoyi
name: Wang, Xingde
name: Gong, Yamin
name: Zhu, Wei-Guo
name: Xu, Xingzhi
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Plant Biology

description: Macroautophagy/autophagy is essential for the degradation and recycling of cytoplasmic materials. The initiation of this process is determined by phosphatidylinositol-3-kinase (PtdIns3K) complex, which is regulated by factor BECN1 (beclin 1). UFMylation is a novel ubiquitin-like modification that has been demonstrated to modulate several cellular activities. However, the role of UFMylation in regulating autophagy has not been fully elucidated. Here, we found that VCP/p97 is UFMylated on K109 by the E3 UFL1 (UFM1 specific ligase 1) and this modification promotes BECN1 stabilization and assembly of the PtdIns3K complex, suggesting a role for VCP/p97 UFMylation in autophagy initiation. Mechanistically, VCP/p97 UFMylation stabilizes BECN1 through ATXN3 (ataxin 3)-mediated deubiquitination. As a key component of the PtdIns3K complex, stabilized BECN1 facilitates assembly of this complex. Re-expression of VCP/p97, but not the UFMylation-defective mutant, rescued the VCP/p97 depletion-induced increase in MAP1LC3B/LC3B protein expression. We also showed that several pathogenic VCP/p97 mutations identified in a variety of neurological disorders and cancers were associated with reduced UFMylation, thus implicating VCP/p97 UFMylation as a potential therapeutic target for these diseases. Abbreviation: ATG14:autophagy related 14; Baf A1:bafilomycin A1;CMT2Y: Charcot-Marie-Toothdisease, axonal, 2Y; CYB5R3: cytochromeb5 reductase 3; DDRGK1: DDRGK domain containing 1; DMEM:Dulbecco’smodified Eagle’s medium;ER:endoplasmic reticulum; FBS:fetalbovine serum;FTDALS6:frontotemporaldementia and/or amyotrophic lateral sclerosis 6; IBMPFD1:inclusion bodymyopathy with early-onset Paget disease with or withoutfrontotemporal dementia 1; LC-MS/MS:liquid chromatography tandem mass spectrometry; MAP1LC3B/LC3B:microtubule associated protein 1 light chain 3 beta; MS: massspectrometry; NPLOC4: NPL4 homolog, ubiquitin recognition factor;PIK3C3: phosphatidylinositol 3-kinase catalytic subunit type 3;PIK3R4: phosphoinositide-3-kinase regulatory subunit 4; PtdIns3K:phosphatidylinositol 3-kinase; RPL26: ribosomal protein L26; RPN1:ribophorin I; SQSTM1/p62: sequestosome 1; UBA5: ubiquitin likemodifier activating enzyme 5; UFC1: ubiquitin-fold modifierconjugating enzyme 1; UFD1: ubiquitin recognition factor in ERassociated degradation 1; UFL1: UFM1 specific ligase 1; UFM1:ubiquitin fold modifier 1; UFSP2: UFM1 specific peptidase 2; UVRAG:UV radiation resistance associated; VCP/p97: valosin containingprotein; WT: wild-type
Multilevel syncretism and the evolution of Afrikaans periphrastic possessives with SE
Creators: name: Roberge, Paul
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: 1. The Problem In Dutch three constructions are available to render the possessive relation. One can use the sigmatic genitive after proper nouns and (namelike) NPs denoting close relatives (la, b), the preposition van (Ic), or a weakened form of the possessive pronoun, which varies according to the gender and number of the possesser (ld-t)
Priority based bandwidth allocation in wireless sensor networks
Creators: name: Cherian, Mary
name: Nair, T. R. Gopalakrishnan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Most of the sensor network applications need real time communication and the need for deadline aware real time communication is becoming eminent in these applications. These applications have different dead line requirements also. The real time applications of wireless sensor networks are bandwidth sensitive and need higher share of bandwidth for higher priority data to meet the dead line requirements. In this paper we focus on the MAC layer modifications to meet the real time requirements of different priority data. Bandwidth partitioning among different priority transmissions is implemented through MAC layer modifications. The MAC layer implements a queuing model that supports lower transfer rate for lower priority packets and higher transfer rate for real time packets with higher priority, minimizing the end to end delay. The performance of the algorithm is evaluated with varying node distribution.
description: 10 pages, International Journal of Computer Networks & Communications (IJCNC) Vol.6, No.6, November 2014
Stability in quadratic torsion theories
Creators: name: Vasilev, Teodor Borislavov
name: Cembranos, Jose A. R.
name: Valcarcel, Jorge Gigante
name: Martín-Moruno, Prado
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the definition and some of the characteristics of quadratic theories of gravity with torsion. We start from the most general Lagrangian density quadratic in the curvature and torsion tensors. By assuming that General Relativity should be recovered when torsion vanishes and investigating the behaviour of the vector and pseudovector torsion fields in the weak-gravity regime, we present a set of necessary conditions for the stability of these theories. Moreover, we explicitly obtain the gravitational field equations using the Palatini variational principle with the metricity condition implemented via a Lagrange multiplier.
description: A missing -1 factor in the pseudo-vectorial sector has been detected in Appendix D, conclusions partially changed in sections 3.3 and 4
Demonstrating Flow-Level In-Switch Inference
Creators: name: Gucciardo, Michele
name: Akem, Aristide Tanyi-Jong
name: Bütün, Beyza
name: Fiore, Marco
Publisher: name: Zenodo
Year: 2023

description: Existing approaches for in-switch inference with Random Forest (RF) models that can run on production-level hardware do not support flow-level features and have limited scalability to the task size. This leads to performance barriers when tackling complex inference problems with sizable decision spaces. Flowrest is a complete RF model framework that fills existing gaps in the existing literature and enables practical flowlevel inference in commercial programmable switches. In this demonstration, we exhibit how Flowrest can classify individual traffic flows at line rate in an experimental platform based on Intel Tofino switches. To this end, we run experiments with real-world measurement data, and show how Flowrest yields improvements in accuracy with respect to solutions that are limited to packet-level inference in programmable hardware.
RTN3L and CALCOCO1 function in parallel to maintain proteostasis in the endoplasmic reticulum
Creators: name: Kumar, Kamal
name: Chidambaram, Ravi
name: Parashar, Smriti
name: Ferro-Novick, Susan
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified

description: Reticulophagy is mediated by autophagy receptors that function in one of the two domains of the ER, tubules or flat sheets. Three different conserved mammalian receptors mediate autophagy in ER tubules: RTN3L, ATL3 and CALCOCO1. Previous studies have shown that RTN3L maintains proteostasis by targeting mutant aggregation-prone proteins for autophagy at distinct foci in ER tubules that we named ERPHS (ER-reticulophagy sites). The role for ATL3 and CALCOCO1 in proteostasis has not been addressed. Here we analyzed three different misfolded disease-causing RTN3L substrates and show that ATL3 and CALCOCO1 target the same cargoes for autophagy. Colocalization and knock down studies revealed that RTN3L and ATL3 are both required for the formation of RTN3L-containing ERPHS, while CALCOCO1 is not. We propose that RTN3L, ATL3 and CALCOCO1 work in parallel to maintain proteostasis within the ER network by targeting cargoes at different sites in the tubules.Abbreviation ATL3: atlastin GTPase 3; Baf: bafilomycin A1; CALCOCO1: calcium binding and coiled-coil domain 1; Epr1: ER-phagy receptor 1; ER: endoplasmic reticulum; ERAD: ER-associated protein degradation; ERPHS: ER-reticulophagy sites; LAMP1: lysosomal associated membrane protein 1; PGRMC1: progesterone receptor membrane component 1; POMC: proopiomelanocortin; Pro-AVP: pro-arginine vasopressin; RETREG1: reticulophagy regulator 1; reticulophagy: endoplasmic reticulum selective autophagy; RTN3L: reticulon 3 long isoform; VAPA: VAMP associated protein A
Single-inclusive particle production in proton-nucleus collisions at next-to-leading order in the hybrid formalism
Creators: name: Altinoluk, Tolga
name: Armesto, Nestor
name: Beuf, Guillaume
name: Kovner, Alex
name: Lublinsky, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We reconsider the perturbative next-to-leading calculation of the single inclusive hadron production in the framework of the hybrid formalism, applied to hadron production in proton-nucleus collisions. Our analysis, performed in the wave function approach, differs from the previous works in three points. First, we are careful to specify unambiguously the rapidity interval that has to be included in the evolution of the leading-order eikonal scattering amplitude. This is important, since varying this interval by a number of order unity changes the next-to-leading order correction that the calculation is meant to determine. Second, we introduce the explicit requirement that fast fluctuations in the projectile wave function which only exist for a short time are not resolved by the target. This Ioffe time cutoff also strongly affects the next-to-leading order terms. Third, our result does not employ the approximation of a large number of colors. Our final expressions are unambiguous and do not coincide at next-to-leading order with the results available in the literature.
description: 43 pages, 1 figure, Appendix added, references added, misprints corrected
An Overview of Polynomially Computable Characteristics of Special Interval Matrices
Creators: name: Hladík, Milan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: It is well known that many problems in interval computation are intractable, which restricts our attempts to solve large problems in reasonable time. This does not mean, however, that all problems are computationally hard. Identifying polynomially solvable classes thus belongs to important current trends. The purpose of this paper is to review some of such classes. In particular, we focus on several special interval matrices and investigate their convenient properties. We consider tridiagonal matrices, {M,H,P,B}-matrices, inverse M-matrices, inverse nonnegative matrices, nonnegative matrices, totally positive matrices and some others. We focus in particular on computing the range of the determinant, eigenvalues, singular values, and selected norms. Whenever possible, we state also formulae for determining the inverse matrix and the hull of the solution set of an interval system of linear equations. We survey not only the known facts, but we present some new views as well.
title: Digital transformation in destination management
title: development of a multi-sided platform business model for destination management organisations
titleType: Subtitle
Creators: name: Hoffmann, Louis
Publisher: name: FH Vorarlberg
Year: 2020
Subjects: subject: 330 Wirtschaft

description: Digitalisation poses great challenges for regional tourism management. However, many organisations are currently undergoing a transformation from a marketing to a destination management organisation (DMO), which is why only a few have managed to adopt new digital approaches and to assert themselves as DMOs within the destination and against ever growing global platforms. The presented master thesis therefore deals with this issue and aims to pave the way for DMOs to develop and use digital business models themselves. The objective of the thesis is to develop a systematic process for the development of own DMO business models and to evaluate whether the establishment of a multi-sided platform as the recipe for the success of global platform providers is also suitable for DMOs. For this purpose, an extensive literature research was conducted and semi-structured expert interviews were evaluated. In addition, the Anchor Point Canvas was developed as a supporting framework for the modelling of business models for companies with historically grown structures and constraints.
description: Die Digitalisierung stelle das regionale Tourismusmanagement vor große Herausforderungen. Viele Organisationen befinden sich allerdings aktuell im Wandel von einer Marketing- zu einer Destinationsmanagementorganisation (DMO), weshalb es bislang nur wenige geschafft haben, neue digitale Wege einzuschlagen und sich als DMO innerhalb der Destination und gegenüber immer stärker werdenden globalen Plattformen zu behaupten. Die vorliegende Masterthesis beschäftigt sich daher mit diesem Thema und soll den Weg für DMOS ebnen, digitale Geschäftsmodelle selbst zu entwickeln und zu nutzen. Ziel der Arbeit ist es, einen systematischen Prozess zur Entwicklung eigener DMO Geschäftsmodelle zu entwickeln und zu bewerten, ob der Aufbau einer Multi-sided Platform als Erfolgsrezept globaler Anbieter, auch für DMOs geeignet ist. Dazu wurde eine umfangreiche Literaturrecherche durchgeführt sowie semi-strukturierte Experteninterviews ausgewertet. Darüber hinaus wurde im Rahmen der Thesis das Anchor Point Canvas als unterstützendes Werkzeug bei der Modellierung von Geschäftsmodellen für Unternehmen mit historisch gewachsenen Strukturen und Einschränkungen entwickelt.
The Deng algorithm in higher dimensions
Creators: name: Nyonyi, Y.
name: Maharaj, S. D.
name: Govinder, K. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We extend an algorithm of Deng in spherically symmetric spacetimes to higher dimensions. We show that it is possible to integrate the generalised condition of pressure isotropy and generate exact solutions to the Einstein field equations for a shear-free cosmological model with heat flow in higher dimensions. Three new metrics are identified which contain results of four dimensions as special cases. We show graphically that the matter variables are well behaved and the speed of sound is causal.
description: 13 pages, Submitted for publication
Rehabilitating the ColorChecker Dataset for Illuminant Estimation
Creators: name: Hemrit, Ghalia
name: Finlayson, Graham D.
name: Gijsenij, Arjan
name: Gehler, Peter
name: Bianco, Simone
name: Funt, Brian
name: Drew, Mark
name: Shi, Lilong
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In a previous work, it was shown that there is a curious problem with the benchmark ColorChecker dataset for illuminant estimation. To wit, this dataset has at least 3 different sets of ground-truths. Typically, for a single algorithm a single ground-truth is used. But then different algorithms, whose performance is measured with respect to different ground-truths, are compared against each other and then ranked. This makes no sense. We show in this paper that there are also errors in how each ground-truth set was calculated. As a result, all performance rankings based on the ColorChecker dataset - and there are scores of these - are inaccurate. In this paper, we re-generate a new 'recommended' set of ground-truth based on the calculation methodology described by Shi and Funt. We then review the performance evaluation of a range of illuminant estimation algorithms. Compared with the legacy ground-truths, we find that the difference in how algorithms perform can be large, with many local rankings of algorithms being reversed. Finally, we draw the readers attention to our new 'open' data repository which, we hope, will allow the ColorChecker set to be rehabilitated and once again to become a useful benchmark for illuminant estimation algorithms.
description: 4 pages, 3 figures, 2 tables, Proceedings of the 26th Color and Imaging Conference
A class of infinite-dimensional representations of the Lie superalgebra osp(2m+1|2n) and the parastatistics Fock space
Creators: name: Stoilova, N. I.
name: Van der Jeugt, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An orthogonal basis of weight vectors for a class of infinite-dimensional representations of the orthosymplectic Lie superalgebra osp(2m+1|2n) is introduced. These representations are particular lowest weight representations V(p), with a lowest weight of the form [-p/2,...,-p/2|p/2,...,p/2], p being a positive integer. Explicit expressions for the transformation of the basis under the action of algebra generators are found. Since the relations of algebra generators correspond to the defining relations of m pairs of parafermion operators and n pairs of paraboson operators with relative parafermion relations, the parastatistics Fock space of order p is also explicitly constructed. Furthermore, the representations V(p) are shown to have interesting characters in terms of supersymmetric Schur functions, and a simple character formula is also obtained.
description: 15 pages
Low Cost Radiation Hardened Software and Hardware Implementation for CubeSats
Creators: name: Yuen, Brosnan
name: Sima, Mihai
Publisher: name: arXiv
Year: 2019
Subjects: subject: Space Physics (physics.space-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: CubeSats are small satellites used for scientific experiments because they cost less than full sized satellites. Each CubeSat uses an on-board computer. The on-board computer performs sensor measurements, data processing, and CubeSat control. The challenges of designing an on-board computer are costs, radiation, thermal stresses, and vibrations. An on-board computer was designed and implemented to solve these challenges. The on-board computer used special components to mitigate radiation effects. Software was also used to provide redundancies in cases of faults. This paper may aid future spacecraft design as it improves the reliability of spacecraft, while keeping costs low.
SCFFBXW5-mediated degradation of AQP3 suppresses autophagic cell death through the PDPK1-AKT-MTOR axis in hepatocellular carcinoma cells
Creators: name: Liang, Yupei
name: Chen, Ping
name: Wang, Shiwen
name: Cai, Lili
name: Zhu, Feng
name: Jiang, Yanyu
name: Li, Lihui
name: Zhu, Lihua
name: Heng, Yongqing
name: Zhang, Wenjuan
name: Pan, Yongfu
name: Wei, Wenyi
name: Jia, Lijun
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: AQP3 (aquaporin 3 (Gill blood group)), a member of the AQP family, is an aquaglyceroporin which transports water, glycerol and small solutes across the plasma membrane. Beyond its role in fluid transport, AQP3 plays a significant role in regulating various aspects of tumor cell behavior, including cell proliferation, migration, and invasion. Nevertheless, the underlying regulatory mechanism of AQP3 in tumors remains unclear. Here, for the first time, we report that AQP3 is a direct target for ubiquitination by the SCFFBXW5 complex. In addition, we revealed that downregulation of FBXW5 significantly induced AQP3 expression to prompt macroautophagic/autophagic cell death in hepatocellular carcinoma (HCC) cells. Mechanistically, AQP3 accumulation induced by FBXW5 knockdown led to the degradation of PDPK1/PDK1 in a lysosomal-dependent manner, thus inactivating the AKT-MTOR pathway and inducing autophagic death in HCC. Taken together, our findings revealed a previously undiscovered regulatory mechanism through which FBXW5 degraded AQP3 to suppress autophagic cell death via the PDPK1-AKT-MTOR axis in HCC cells. Abbreviation: BafA1: bafilomycin A1; CQ: chloroquine; CRL: CUL-Ring E3 ubiquitin ligases; FBXW5: F-box and WD repeat domain containing 5; HCC: hepatocellular carcinoma; HSPA8/HSC70: heat shock protein family A (Hsp70) member 8; 3-MA: 3-methyladenine; PDPK1/PDK1: 3-phosphoinositide dependent protein kinase 1; RBX1/ROC1: ring-box 1; SKP1: S-phase kinase associated protein 1; SCF: SKP1-CUL1-F-box protein.
Picornavirus VP3 protein induces autophagy through the TP53-BAD-BAX axis to promote viral replication
Creators: name: Mao, Ruoqing
name: Zhu, Zixiang
name: Yang, Fan
name: Sun, Dehui
name: Zhou, Xiaoli
name: Cao, Weijun
name: Qin, Xiaodong
name: Dang, Wen
name: Liu, Huanan
name: Tian, Hong
name: Zhang, Keshan
name: Wu, Qingfeng
name: Liu, Xiangtao
name: Zheng, Haixue
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Macroautophagy/autophagy and apoptosis are pivotal interconnected host cell responses to viral infection, including picornaviruses. Here, the VP3 proteins of picornaviruses were determined to trigger autophagy, with the autophagic flux being triggered by the TP53-BAD-BAX axis. Using foot-and-mouth disease virus (FMDV) as a model system, we unraveled a novel mechanism of how picornavirus hijacks autophagy to bolster viral replication and enhance pathogenesis. FMDV infection induced both autophagy and apoptosis in vivo and in vitro. FMDV VP3 protein facilitated the phosphorylation and translocation of TP53 from the nucleus into the mitochondria, resulting in BAD-mediated apoptosis and BECN1-mediated autophagy. The amino acid Gly129 in VP3 is essential for its interaction with TP53, and crucial for induction of autophagy and apoptosis. VP3-induced autophagy and apoptosis are both essential for FMDV replication, while, autophagy plays a more important role in VP3-mediated pathogenesis. Mutation of Gly129 to Ala129 in VP3 abrogated the autophagic regulatory function of VP3, which significantly decreased the viral replication and pathogenesis of FMDV. This suggested that VP3-induced autophagy benefits viral replication and pathogenesis. Importantly, this Gly is conserved and showed a common function in various picornaviruses. This study provides insight for developing broad-spectrum antivirals and genetic engineering attenuated vaccines against picornaviruses. Abbreviations: 3-MA, 3-methyladenine; ATG, autophagy related; BAD, BCL2 associated agonist of cell death; BAK1, BCL2 antagonist/killer 1; BAX, BCL2 associated X, apoptosis regulator; BBC3/PUMA, BCL2 binding component 3; BCL2, BCL2 apoptosis regulator; BID, BH3 interacting domain death agonist; BIP-V5, BAX inhibitor peptide V5; CFLAR/FLIP, CASP8 and FADD like apoptosis regulator; CPE, cytopathic effects; CQ, chloroquine; CV, coxsackievirus; DAPK, death associated protein kinase; DRAM, DNA damage regulated autophagy modulator; EV71, enterovirus 71; FMDV, foot-and-mouth disease virus; HAV, hepatitis A virus; KD, knockdown; MAP1LC3/LC3, microtubule associated protein 1 light chain 3; MOI, multiplicity of infection; MTOR, mechanistic target of rapamycin kinase; PML, promyelocytic leukemia; PV, poliovirus; SVA, Seneca Valley virus; TCID50, 50% tissue culture infectious doses; TOR, target of rapamycin. TP53/p53, tumor protein p53; WCL, whole-cell lysate.
Aspects of Neutrino Interactions (Scattering at small $Q^2$- Region)
Creators: name: Hoinka, T.
name: Paschos, E. A.
name: Thomas, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The article begins with a description of chiral symmetry and its application to neutrino induced reactions. For small $Q^2$ (forward direction) the process is dominated by the amplitute with helicity zero where the pion pole disappears when multiplied with the polarization vector. The remaining part of the amplitude is determined by PCAC. For $E_ν> 2$ GeV the computed cross sections are in good agreement with data. In coherent pion production we expect equal yields for neutrinos and antineutrinos a relation which for $E_ν> 2$ GeV is fulfilled. We discuss specific features of the data and suggest methods for improving them by presenting new estimates for the incoherent background.
description: Presented at the CETUP-Workshop on Neutrino Interactions, July 22-31, 2014 at Lead/Dead Wood, South Dakota, USA. The resubmission contains minor corrections
Complex support vector machines regression for robust channel estimation in LTE downlink system
Creators: name: Charrada, Anis
name: Samet, Abdelaziz
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, the problem of channel estimation for LTE Downlink system in the environment of high mobility presenting non-Gaussian impulse noise interfering with reference signals is faced. The estimation of the frequency selective time varying multipath fading channel is performed by using a channel estimator based on a nonlinear complex Support Vector Machine Regression (SVR) which is applied to Long Term Evolution (LTE) downlink. The estimation algorithm makes use of the pilot signals to estimate the total frequency response of the highly selective fading multipath channel. Thus, the algorithm maps trained data into a high dimensional feature space and uses the structural risk minimization principle to carry out the regression estimation for the frequency response function of the fading channel. The obtained results show the effectiveness of the proposed method which has better performance than the conventional Least Squares (LS) and Decision Feedback methods to track the variations of the fading multipath channel.
description: 13 pages Vol.4, IJCNC (2012) No.1, January 2012. arXiv admin note: substantial text overlap with arXiv:1109.0895
The formation of Afrikaans
Creators: name: Roberge, Paul
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1994

description: 1. Introduction 'If we go back in time, the problem of what Afrikaans is becomes more and more difficult', wrote Valkhoff more than two decades ago (1972:2), and notwithstanding a far better understanding of the material facts, his words remain true today. In what follows I shall elucidate the sociolinguistic nature of the formation of Afrikaans at the Cape of Good Hope. In section 2 I explore the social bases of glottogenesis within a pantheoretical framework in the sense that the parameters I identify will hold for any theory or model of glottogenesis at the Cape. To paraphrase Woolford (1983:2): Although there are internal principles that govern the theoretically possible linguistic paths along which language may evolve in an extraterritorial setting, it is the external factors that determine how radically its linguistic structure will diverge from metropolitan norms. Section 3 is devoted to a critical overview of both current and selected older writings on how Afrikaans came into being. No one who has investigated its history would seriously dispute that the emergence of the new code was a much a social fact as it was a purely linguistic one. But not everyone has put equal emphasis on this truism. In numerous writings on our subject we find widely varying degrees of concern with sociolinguistic relations underlying the formation of Afrikaans. Section 4 explores the implications entailed by adoption of the view that periods of marked shifts in linguistic patterns are largely congruent with significant changes in culture. An eminent linguist/anthropologist of another generation, Harry Hoijer, was of the opinion that in order to understand linguistic change, one must see it as a part of a wider process of cultural change. Naturally, this is not to suggest a causal connection between sociocultural trends and specific linguistic changes. Rather, changes within the various aspects of culture cannot be regarded as distinct and unrelated but must be seen as different realizations of a single process (Hoijer 1948:335). In section 5 I discuss the directional gradience of linguistic items across social class by the end of the Dutch India Company (VOC) era in 1795, with a view toward elaborating on my claim (Roberge 1994) that the Cape Colony was a continuum speech community. More precisely, the Netherlandic speech community at the Cape consisted of a spectrum of dialects ranging from the 'High' Dutch of the expatriate power elite to a Cape Dutch Creole. Rather than concern myself narrowly with the origins of these linguistic items, I focus on their social transmission and development in a context of interacting social groups alternating among variants in their linguistic repertoires. As such, this essay departs somewhat from the usual method of historical disquisition in Afrikaans linguistics, which concentrates on single-feature etymologies and ta)ces for granted the formation of a socially accepted grammar.
Grammatical Prerequisites to Phonological Change?
Creators: name: Roberge, Paul
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1985

description: 0. Introduction In echoing a well-known title of some thirty-seven years ago (K. L.Pike 1947), I do not wish to suggest that considerations of meaning and grammatical function have been ex- cluded from the study of diachronic phonology. How to characterize the interface between phonology and morphosyntax across time has stimulated perennial debate, having com- manded the attention of several generations of historical linguists from Georg Curtius (1870) and Otto Jespersen (1894) to, most recently, Roger Lass (1980, Chap. 3). With a burgeoning literature on the mechanisms of syntactic change and the renascent interest in morphology, the issue is once more felt to be acute. It would seem uncontroversial to assert that grammar plays some role in the course of phonological change - and vice versa. But how to make sense of this truism remains problematic.
Transforming a 4th year Modern Optics Course Using a Deliberate Practice Framework
Creators: name: Jones, David J.
name: Madison, Kirk W.
name: Wieman, Carl E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: We present a study of active learning pedagogies in an upper division physics course. This work was guided by the principle of deliberate practice for the development of expertise, and this principle was used in the design of the materials and the orchestration of the classroom activities of the students. We present our process for efficiently converting a traditional lecture course based on instructor notes into activities for such a course with active learning methods. Ninety percent of the same material was covered and scores on common exam problems showed a 15 % improvement with an effect size greater than 1 after the transformation. We observe that the improvement and the associated effect size is sustained after handing off the materials to a second instructor. Because the improvement on exam questions was independent of specific problem topics and because the material tested was so mathematically advanced and broad (including linear algebra, Fourier Transforms, partial differential equations, vector calculus), we expect the transformation process could be applied to most upper division physics courses having a similar mathematical base.
description: 31 pages
Pilot Food Stamp Program: Its Effect on Retail Food Store Sales in Fayette County, Pa., and McDowell County, W. Va.
Creators: name: Havas, Nick
name: Frye, Robert E.
name: Havas, Nick
name: Frye, Robert E.
Publisher: name: Unknown
Year: 1963
Subjects: Agricultural and Food Policy
Food Consumption/Nutrition/Food Safety
Food Security and Poverty

description: Excerpts from the report Highlights: In Fayette County, Pa., and McDowell County, W. Va., two of the eight areas where the Food Stamp Program was initiated during mid-1961, dollar volume of sales in sample retail food stores averaged 7 percent higher during a 4-week period in April-May 1962 than in the same period a year earlier, prior to initiation of the Food Stamp Program. The largest percentage sales gains recorded by the sample stores were for produce, followed by meat and grocery items. Sales gains were recorded in all sizes of retail food stores but in varying degrees. Very small and fairly large stores gained 8 percent in dollar volume and medium stores 10 percent, while large and small stores gained smaller amounts. Proportion of total sales represented by food coupons in each size of store also varied. Neither gains in sales nor variations in coupon redemptions were of sufficient magnitude in favor of any one group to indicate that store size was a decisive factor in attracting coupon-using customers.
Bulk-surface virtual element method for systems of PDEs in two-space dimension
Creators: name: Frittelli, Massimo
name: Madzvamuse, Anotida
name: Sgura, Ivonne
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M12, 65M15, 65M20, 65M60, 65N30

description: In this paper we consider a coupled bulk-surface PDE in two space dimensions. The model consists of a PDE in the bulk that is coupled to another PDE on the surface through general nonlinear boundary conditions. For such a system we propose a novel method, based on coupling a virtual element method [Beirão da Veiga et al., 2013] in the bulk domain to a surface finite element method [Dziuk & Elliott, 2013] on the surface. The proposed method, which we coin the Bulk-Surface Virtual Element Method (BSVEM) includes, as a special case, the bulk-surface finite element method (BSFEM) on triangular meshes [Madzvamuse & Chung, 2016]. The method exhibits second-order convergence in space, provided the exact solution is $H^{2+1/4}$ in the bulk and $H^2$ on the surface, where the additional $\frac{1}{4}$ is required only in the simultaneous presence of surface curvature and non-triangular elements. Two novel techniques introduced in our analysis are (i) an $L^2$-preserving inverse trace operator for the analysis of boundary conditions and (ii) the Sobolev extension as a replacement of the lifting operator [Elliott & Ranner, 2013] for sufficiently smooth exact solutions. The generality of the polygonal mesh can be exploited to optimize the computational time of matrix assembly. The method takes an optimised matrix-vector form that also simplifies the known special case of BSFEM on triangular meshes [Madzvamuse & Chung, 2016]. Three numerical examples illustrate our findings.
description: 39 pages, 9 figures, 5 tables
An Asymptotic Method for Selection of Inflationary Modes
Creators: name: Yusofi, E.
name: Mohsenzadeh, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present some features of early universe cosmology in terms of Hankel functions index ($ν$). Actually, the recent data from observational cosmology indicate that our universe was nearly de Sitter space-time in the early times which results in an approximate scale-invariant spectrum. This imposes some constrains on index $ν$ [1]. These constrains stimulate us to use general solution of inflaton field equation for $ν\neq{\frac{3}{2}}$. To obtain the general solution for the inflationary background, we use asymptotic expansion of Hankel functions up to non-linear order of $\frac{1}{kη}$. We consider the non-linear modes as the fundamental modes for early universe during the inflation. In this paper, we obtain the general form of the inflationary modes, scale factor expansion, equation of state and some non-linear corrections of power spectrum in terms of index ν. These results are general and in the quasi-de Sitter and de Sitter limit confirm the conventional results.
description: 7 pages, no figures, accepted for publication in Modern Physics Letters A, 2014
From Marvels of Nature to Inmates of Asylums: Imaginations of Natural Folly
Creators: name: Von Bernuth, Ruth
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: In medieval and Renaissance times European courts kept fools, who were placed into one of two categories: artificial fools (or jesters) and natural fools. The present study examines natural fools. Extant studies generally treat natural fools as both mentally and physically ill and/or disabled. This study contributes to the discussion of natural folly by examining two sources about the Ernestinian Saxon court fool Claus Narr. According to the documents natural fools were seen as permanently mentally changed people and classified as so-called "wonder men." Therefore they were kept and collected at courts. When permanent mental difference and psychiatric disease amalgamated at the beginning of the 18th century, however, the natural fool became an object of education and medicine. This paper argues that the changing meaning of the natural fool nevertheless retained components of its initial medieval conception.
Commutators of random matrices from the unitary and orthogonal groups
Creators: name: Palheta, Pedro H. S.
name: Barbosa, Marcelo R.
name: Novaes, Marcel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Group Theory (math.GR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We investigate the statistical properties of $C=uvu^{-1}v^{-1}$, when $u$ and $v$ are independent random matrices, uniformly distributed with respect to the Haar measure of the groups $U(N)$ and $O(N)$. An exact formula is derived for the average value of power sum symmetric functions of $C$, and also for products of the matrix elements of $C$, similar to Weingarten functions. The density of eigenvalues of $C$ is shown to become constant in the large-$N$ limit, and the first $N^{-1}$ correction is found.
description: 26 pages, 4 figures
Let the Computer Say NO! The Neglected Potential of Policy Definition Languages for Data Sovereignty
Creators: name: Bartsch, Jan
name: Dehling, Tobias
name: Lauf, Florian
name: Meister, Sven
name: Sunyaev, Ali
Publisher: name: Springer Fachmedien Wiesbaden
Year: 2022
Subjects: Policy languages
Data sovereignty
Digital platforms
Policy driven management
Platform ecosystems

description: During interaction with today’s internet services and platform ecosystems, consumer data is often harvested and shared without their consent; that is, consumers seized to be the sovereigns of their own data with the proliferation of the internet. Due to the rapid and abundant nature of interactions in today’s platform ecosystems, manual consent management is impractical. To support development of semi-automated solutions for reestablishing data sovereignty, we investigate the use of policy definition languages as machine-readable and enforceable mechanisms for fostering data sovereignty. We conducted a realist literature review of the capabilities of policy definition languages developed for pertinent application scenarios (e.g., for access control in cloud computing). We consolidate extant literature into a framework of the chances and challenges of leveraging policy definition languages as central building blocks for data sovereignty in platform ecosystems.
Properties of Cooperatively Induced Phases in Sensing Models
Creators: name: Sevier, Stuart A.
name: Levine, Herbert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: A large number of eukaryotic cells are able to directly detect external chemical gradients with great accuracy and the ultimate limit to their sensitivity has been a topic of debate for many years. Previous work has been done to understand many aspects of this process but little attention has been paid to the possibility of emergent sensing states. Here we examine how cooperation between sensors existing in a two dimensional network, as they do on the cell's surface, can both enhance and fundamentally alter the response of the cell to a spatially varying signal. We show that weakly interacting sensors linearly amplify the sensors response to an external gradient while a network of strongly interacting sensors form a collective non-linear response with two separate domains of active and inactive sensors forming what have called a "1/2-state" . In our analysis we examine the cell's ability to sense the direction of a signal and pay special attention to the substantially different behavior realized in the strongly interacting regime.
description: 8 pages, 5 figures
Carceral urbanism: Reconstructing the architecture of punitive space in post-genocide Rwanda
Creators: name: Hudani, Shakirah E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2020

description: In this article I make the argument that the prison in post-genocide Rwanda is an architectural artefact and a problem-space around which to examine the transitional dilemmas of the post-genocide period. I examine the changing punitive architecture of incarceration in Rwanda’s capital and in secondary urban areas. Looking at the space of the prison in relation to the changing city, I posit that through the penal production of space, the state reconfigures logics of punitive practices and urban governmentality. Changing logics of incarceration are evident in Rwanda today in the deconcentration of the capital, Kigali, to make way for an urban masterplanned order. In analyzing this shift in the visibility of the penal order in Rwanda over time, I contend that the prison constructs the city through its punitive and surveillance-based logic, as much as the city constitutes the prison as a spatially segregated edifice. I examine two sets of governmental spaces and practices that have run through different eras of Rwanda’s colonial, post-independence and post-genocide periods: (a) the prison and punishment, and (b) the reordering of the capital city and urban planning.
Regular sets in Cayley graphs
Creators: name: Wang, Yanpeng
name: Xia, Binzhou
name: Zhou, Sanming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C25, 05E18, 94B25

description: In a graph $Γ$ with vertex set $V$, a subset $C$ of $V$ is called an $(a,b)$-perfect set if every vertex in $C$ has exactly $a$ neighbors in $C$ and every vertex in $V\setminus C$ has exactly $b$ neighbors in $C$, where $a$ and $b$ are nonnegative integers. In the literature $(0,1)$-perfect sets are known as perfect codes and $(1,1)$-perfect sets are known as total perfect codes. In this paper we prove that, for any finite group $G$, if a non-trivial normal subgroup $H$ of $G$ is a perfect code in some Cayley graph of $G$, then it is also an $(a,b)$-perfect set in some Cayley graph of $G$ for any pair of integers $a$ and $b$ with $0\leqslant a\leqslant|H|-1$ and $0\leqslant b\leqslant |H|$ such that $\gcd(2,|H|-1)$ divides $a$. A similar result involving total perfect codes is also proved in the paper.
description: 12 pages
Corporate Governance: An Evaluative and Evolutionary Approach
Creators: name: BOUNNITE Mohamed Yasser
Publisher: name: Zenodo
Year: 2024

description: Corporate governance is essential for optimizing performance and ensuring the sustainability of contemporary organizations. This article offers an in-depth analysis that combines evaluative and evolutionary approaches to provide a comprehensive understanding of governance practices. The evaluative approach is based on the examination of key indicators such as financial profitability, operational transparency, stakeholder satisfaction, risk management, and environmental responsibility. Complementing this, the evolutionary approach utilizes analytical tools like Markovian modeling to capture the dynamics and evolution of governance practices over time, thereby offering an integrated and temporal perspective on the continuous improvement of organizations.
Stratifications on the Nilpotent Cone of the moduli space of Hitchin pairs
Creators: name: Gothen, Peter B.
name: Zúñiga-Rojas, Ronald A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H60 (Primary), 14D07 (Secondary)

description: We consider the problem of finding the limit at infinity (corresponding to the downward Morse flow) of a Higgs bundle in the nilpotent cone under the natural $\mathbb{C}^*$-action on the moduli space. For general rank we provide an answer for Higgs bundles with regular nilpotent Higgs field, while in rank three we give the complete answer. Our results show that the limit can be described in terms of data defined by the Higgs field, via a filtration of the underlying vector bundle.
description: 10 pages
Geodesic models generated by Lie symmetries
Creators: name: Abebe, G. Z.
name: Maharaj, S. D.
name: Govinder, K. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the junction condition relating the pressure to the heat flux at the boundary of a shearing and expanding spherically symmetric radiating star when the fluid particles are travelling in geodesic motion. The Lie symmetry generators that leave the junction condition invariant are identified and the optimal system is generated. We use each element of the optimal system to transform the partial differential equation to an ordinary differential equation. New exact solutions, which are group invariant under the action of Lie point infinitesimal symmetries, are found. We obtain families of traveling wave solutions and self-similar solutions, amongst others. The gravitational potentials are given in terms of elementary functions, and the line elements can be given explicitly in all cases. We show that the Friedmann dust model is regained as a special case, and we can connect our results to earlier investigations.
description: 16 pages, Submitted for publication