cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Novel Radiation-induced Magnetoresistance Oscillations in a Nondegenerate 2DES on Liquid Helium
Creators: name: Konstantinov, Denis
name: Kono, Kimitoshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the observation of novel magnetoresistance oscillations induced by the resonant inter-subband absorption in nondegenerate 2D electrons bound to the surface of liquid helium. The oscillations are periodic in 1/B and originate from the scattering-mediated transitions of the excited electrons into the Landau states of the first subband. The structure of the oscillations is affected by the collision broadening of the Landau levels and by many-electron effects.
description: 4 figures
NEYROLINGVISTIKANI SHAKLLANTIRISHNING INDIVIDUAL XUSUSIYATLARI
Creators: name: Mahmudova, Ruhshona
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada tilshunoslikning zamonaviy yo‘nalishlaridan biri bo‘lgan neyrolingvistikani shakllantirishning indivudial xususiyatlari haqida ma’lumot berildi. Bunda til-miya aloqalari, metodologiylar, tildagi tartibsizlik va aqliy jarayonlar haqida so‘z bordi.
A Precessing Jet in the CH Cyg Symbiotic System
Creators: name: Karovska, M.
name: Gaetz, T. J.
name: Carilli, C. L.
name: Hack, W.
name: Raymond, J. C.
name: Lee, N. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Jets have been detected in only a few symbiotic binaries to date, and CH Cyg is one of them. In 2001, a non-relativistic jet was detected in CH Cyg for the first time in X-rays. We carried out coordinated Chandra, HST, and VLA observations in 2008 to study the propagation of this jet and its interaction with the circumbinary medium. We detected the jet with Chandra and HST and determined that the apex has expanded to the South from about 300 AU to about 1400 AU, with the shock front propagating with velocity < 100 km/s. The shock front has significantly slowed down since 2001. Unexpectedly, we also discovered a powerful jet in the NE-SW direction, in the X-ray, optical and radio. This jet has a multi-component structure, including an inner jet and a counter-jet at about 170 AU, and a SW component ending in several clumps extending out to approximately 750 AU. The structure of the jet and the curvature of the outer portion of the SW jet suggest an episodically powered precessing jet, or a continuous precessing jet with occasional mass ejections or pulses. We carried out detailed spatial mapping of the X-ray emission and correlation with the optical and radio emission. X-ray spectra were extracted of the central source, inner NE counter jet, and the brightest clump at a distance of approximately 500 AU from the central source. We discuss the initial results of our analyses, including the multi-component spectral fitting of the jet-components and of the central source.
description: 15 pages with 4 figures, Accepted by ApJ Letters
Large forward-backward asymmetry in B --> K mu+ mu- from new physics tensor operators
Creators: name: Alok, Ashutosh Kumar
name: Dighe, Amol
name: Sankar, S. Uma
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the constraints on possible new physics contribution to the forward-backward asymmetry of muons, A_{FB}(q^2), in B --> K mu+ mu-. New physics in the form of vector/axial-vector operators does not contribute to A_{FB}(q^2) whereas new physics in the form of scalar/pseudoscalar operators can enhance A_{FB}(q^2) only by a few per cent. However new physics the form of tensor operators can take the peak value of A_{FB}(q^2) to as high as 40% near the high-q^2 end point. In addition, if both scalar/pseudoscalar and tensor operators are present, then A_{FB}(q^2) can be more than 15% for the entire high-q^2 region q^2 > 15 GeV^2. The observation of significant A_{FB} would imply the presence of new physics tensor operators, whereas its q^2 dependence could further indicate the presence of new scalar/pseudoscalar physics.
description: 19 pages, 5 figures
The mass exclusion limits for the BSM vector resonances with the direct couplings to the third quark generation
Creators: name: Gintner, Mikulas
name: Juran, Josef
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The upper bounds that the LHC measurements searching for heavy resonances beyond the Standard model set on the resonance production cross sections are not universal. They depend on various characteristics of the resonance under consideration, and their validity is also limited by the assumptions and approximations applied to their calculations. The bounds are typically used to derive the mass exclusion limits for the new resonances. We address some of the issues that emerge when deriving the mass exclusion limits for the strongly coupled composite $SU(2)_{L+R}$ vector resonance triplet which would interact directly to the third quark generation only. We show that the presence of such interactions in the model can lower the mass exclusion limits.
description: 6 pages, 2 figures, 1 table, 40th International Conference on High Energy physics - ICHEP2020, July 28 - August 6, 2020, Prague, Czech Republic
Discovery of very high energy gamma-rays from the flat spectrum radio quasar 3C 279 with the MAGIC telescope
Creators: name: Errando, M.
name: Bock, R.
name: Kranich, D.
name: Lorenz, E.
name: Majumdar, P.
name: Mariotti, M.
name: Mazin, D.
name: Prandini, E.
name: Tavecchio, F.
name: Teshima, M.
name: Wagner, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: 3C 279 is one of the best studied flat spectrum radio quasars located at a comparatively large redshift of z = 0.536. Observations in the very high energy band of such distant sources were impossible until recently due to the expected steep energy spectrum and the strong gamma-ray attenuation by the extragalactic background light photon field, which conspire to make the source visible only with a low energy threshold. Here the detection of a significant gamma-ray signal from 3C 279 at very high energies (E > 75 GeV) during a flare in early 2006 is reported. Implications of its energy spectrum on the current understanding of the extragalactic background light and very high energy gamma-ray emission mechanism models are discussed.
description: 4 pages, 6 figures, submitted to proceedings of "4th Heidelberg International Symposium on High Energy Gamma-Ray Astronomy 2008"
Development of an H2S emission model for wastewater treatment plants (WWTPs)
Creators: name: Tian, Lan
name: Han, Caiyun
name: Zhang, Jingyu
name: Ouyang, Yun
name: Xi, Jinying
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified

description: Modeling and prediction of H2S emission from wastewater are important since gaseous H2S will induce significant corrosion and odor problems. Most previous studies focused on H2S emission of wastewater in pipeline systems, which may not be fit for H2S emission in wastewater treatment plants (WWTPs). This study provided a two-phase mass transfer model for prediction of H2S emission concentrations. The model is based on the mass transfer rate equation of the mass transfer impetus, expressed by the concentration difference. The main parameters of the model are the mass transfer coefficient, the carrier gas flow rate and the concentration of H2S in liquid phase. The results showed that the model can simulate and predict H2S emission concentrations of various processes in WWTPs. Moreover, the model can analyze and predict the influences of different pH values, mass transfer coefficients and carrier gas flow rates on H2S emission concentrations and loads. Therefore, the model provides theoretical guidance for design of WWTPs regarding H2S emissions. Implications: Modeling and prediction of H2S emission from wastewater are quite important since gaseous H2S will induce significant corrosion and odor problems. Most of previous studies are focused on H2S emission from wastewater in pipeline system, which may not be fit for H2S emission in wastewater treatment plants (WWTPs). Thus in this study, a model for predicting H2S emission from typical units of WWTPs is established and verified. Moreover, the influences of pH values, mass transfer coefficients and carrier gas flow rates on H2S emission are analyzed. The model can be a useful tool to predict the H2S concentration in odor gas collection system of WWTP and understand the behaviors of H2S emission under different WWTPs operating conditions.
Supplementary document for Tailoring quantum trajectories for strong-field imaging - 6704976.pdf
Creators: name: Sanchez, Aurelien
name: Tulsky, Vasily
name: Amini, Kasra
name: Bruner, Barry
name: Alon, Gideon
name: Krueger, Michael
name: liu, xinyao
name: Steinle, Tobias
name: Bauer, Dieter
name: Dudovich, Nirit
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Document
Assessing the dust selection bias in quasar absorbers at 0.7 < z< 1.6: Zn/Fe abundances in a radio-selected sample
Creators: name: Ellison, Sara L.
name: Lopez, Sebastian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Complete Optical and Radio Absorption Line System (CORALS) survey has previously been used to demonstrate that the number density, gas and metals content of z>1.6 damped Lyman alpha systems is not significantly under-estimated in magnitude limited surveys. In this paper, a sample of strong MgII absorbers selected from the optically complete 0.7 < z < 1.6 CORALS sample of Ellison et al. is used to assess the potential of dust bias at intermediate redshifts. From echelle spectra of all CORALS absorbers with MgII lambda 2796 and FeII lambda 2600 rest equivalent widths > 0.5 A in the redshift range 0.7 < z < 1.6, we determine column densities of Zn, Cr, Fe, Mn and Si. The range of dust-to-metals ratios and inferred number density of DLAs from the D-index are consistent with optical samples. We also report the discovery of 4 new absorbers in the echelle data in the redshift range 1.7 < z< 2.0, two of which are confirmed DLAs and one is a sub-DLA, whilst the Lya line is not covered for the fourth.
description: Accepted for publication in MNRAS
INFLUENCE OF UZBEK LITERATURE ON WORLD CINEMA
Creators: name: Mamatxalilova, Dinora
Publisher: name: Zenodo
Year: 2024

description: This article explores the influence of Uzbek literature on world cinema, examining the ways in which Uzbek literary works have been adapted, referenced, and celebrated in films across the globe. Through a comprehensive literature review and analysis of selected films, this study highlights the cultural significance of Uzbek literature and its impact on the international film industry. The results demonstrate that Uzbek literature has inspired filmmakers to create compelling narratives, showcasing the rich cultural heritage of Uzbekistan. The article concludes by emphasizing the importance of further research in this field to better understand the cross-cultural exchange between literature and cinema.
A New Generating Function of (q-) Bernstein Type Polynomials and their Interpolation Function
Creators: name: Simsek, Yilmaz
name: Acikgoz, Mehmet
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 11B68, 11M06, 11S40, 11S80, 28B99, 41A10, 41A50, 65D17

description: The main object of this paper is to construct a new generating function of the (q-) Bernstein type polynomials. We establish elementary properties of this function. By using this generating function, we derive recurrence relation and derivative of the (q-) Bernstein type polynomials. We also give relations between the (q-) Bernstein type polynomials, Hermite polynomials, Bernoulli polynomials of higher-order and the second kind Stirling numbers. By applying Mellin transformation to this generating function, we define interpolation of the (q-) Bernstein type polynomials. Moreover, we give some applications and questions on approximations of (q-) Bernstein type polynomials, moments of some distributions in Statistics.
Supplementary_Macroevolutionary drivers of morphological disparity in the avian quadrate
Creators: name: Kuo, Pei-Chen
name: Navalón, Guillermo
name: Benson, Roger B. J.
name: Field, Daniel J.
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310499
subject: Evolutionary biology not elsewhere classified
classificationCode: 370506
subject: Palaeontology (incl. palynology)

description: In birds, the quadrate connects the mandible and skull, and plays an important role in cranial kinesis. Avian quadrate morphology may therefore be assumed to have been influenced by selective pressures related to feeding ecology, yet large-scale variation in quadrate morphology and its potential relationship with ecology have never been quantitatively investigated. Here, we used geometric morphometrics and phylogenetic comparative methods to quantify morphological variation of the quadrate and its relationship with key ecological features across a wide phylogenetic sample. We found non-significant associations between quadrate shape and feeding ecology across different scales of phylogenetic comparison; indeed, allometry and phylogeny exhibit stronger relationships with quadrate shape than ecological features. We show that similar quadrate shapes are associated with widely varying dietary ecologies (one-to-many mapping), while divergent quadrate shapes are associated with similar dietary ecologies (many-to-one mapping). Moreover, we show that the avian quadrate evolves as an integrated unit and exhibits strong associations with the morphologies of neighbouring bones. Our results collectively illustrate that quadrate shape has evolved jointly with other elements of the avian kinetic system, with the major crown bird lineages exploring alternative quadrate morphologies, highlighting the potential diagnostic value of quadrate morphology in investigations of bird systematics.
Dynamic Relative Representations for Goal-Oriented Semantic Communications
Creators: name: Fiorellino, Simone
name: Battiloro, Claudio
name: Strinati, Emilio Calvanese
name: Di Lorenzo, Paolo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In future 6G wireless networks, semantic and effectiveness aspects of communications will play a fundamental role, incorporating meaning and relevance into transmissions. However, obstacles arise when devices employ diverse languages, logic, or internal representations, leading to semantic mismatches that might jeopardize understanding. In latent space communication, this challenge manifests as misalignment within high-dimensional representations where deep neural networks encode data. This paper presents a novel framework for goal-oriented semantic communication, leveraging relative representations to mitigate semantic mismatches via latent space alignment. We propose a dynamic optimization strategy that adapts relative representations, communication parameters, and computation resources for energy-efficient, low-latency, goal-oriented semantic communications. Numerical results demonstrate our methodology's effectiveness in mitigating mismatches among devices, while optimizing energy consumption, delay, and effectiveness.
Nucleon Emision Off Nuclei Induced By Neutrino Interactions
Creators: name: Valverde, M.
name: Nieves, J.
name: Amaro, J. E.
name: Vicente-Vacas, M. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We make a review of the main nuclear effects that affect neutrino-nucleus cross sections. We discuss how the different models in the literature try to describe these different effects, and thus try to compare between them. We focus on the quasi-elastic reaction in the neutrino energy region of around 1 GeV, where recent data from MiniBoone are available. Among the issues discussed are the different treatment of medium corrections to initial and nal state nucleon wave functions and the problem of the rescattering of ejected nucleons.
description: 5 pages, 5 figures. To appear in the proceedings for NuFact09; July 20-25, (2009) Illinois Institute of Technology
Alan Crawley, contemporary verse and the development of modern poetry in the forties
Creators: name: McCullagh, Leota Joan
Publisher: name: University of British Columbia
Year: 2011

description: The development of modern poetry in Canada is presented by the critics in essentially a straight line progression beginning with the Montreal Group in the twenties and culminating in the 'Renaissance' of the forties which was fostered largely by the Montreal little magazines Preview and First Statement. This presentation is distorted in several ways. It suggests that modernism was established in Canada in the twenties and gives a disproportionate amount of credit and influence to the Montreal Group; it neglects the confused and uncertain period of the thirties; and it almost entirely ignores the important contribution made to the establishment and development of modernism in Canada by Alan Crawley and his west coast magazine Contemporary Verse. The work of the Montreal Group was extremely important to the development of modern poetry in Canada. It was through their efforts that the influences of Yeats and Eliot were introduced to Canada, and these influences provided an exhilarating antidote to the excesses of the nineteenth-century genteel romanticism that dominated Canadian poetry at the time. But it is a mistake to think that the ideas and techniques of the .Montreal Group became current in the twenties or the thirties. A review of poetry published before the forties indicates indisputably that nineteenth-century styles and attitudes were dominant and that modernism came in a very weak second. The kind of poetry that was fashioned after Eliot and Yeats seemed too intellectual, too abstract to be relevant to a people in the midst of a major social dislocation—the Depression. It was not until the forties under the stimulus and direction of the social realism poetry of Auden and his group that modernism really became established in Canada, Preview was an important part of this development because it made Auden's ideas and techniques current. First Statement helped to temper this new poetry by focusing on its imported, derivative quality. But it was Alan Crawley's Contemporary Verse which began it all in.1941. This thesis will make the contents of Contemporary Verse more accessible and better known by means of an index; and will explore the contribution that Alan Crawley made to the development of modern poetry in Canada by editing, of Contemporary (1941-1952), by criticizing and counselling poets, and by generally fostering an interest in poetry through lectures, radio talks, and poetry reading tours. As much as possible Crawley and his contemporaries will speak for themselves through their letters. Chapter I will lay the ground work by exploring the development of modern poetry in the pre-forties period as it is presented in the literature; Chapter II will discuss the beginning of Contemporary Verse; Chapter III the magazine and Alan Crawley's allied activities during the war years; Chapter IV the post-war years; and Chapter V will offer concluding remarks on the significance of Alan Crawley's work to the development of poetry in the forties.
Kavalactones isolated from Alpinia zerumbet (Pers.) Burtt. et Smith with protective effects against human umbilical vein endothelial cell damage induced by high glucose
Creators: name: You, Hualin
name: He, Min
name: Pan, Di
name: Fang, Guanqin
name: Chen, Yan
name: Zhang, Xu
name: Shen, Xiangchun
name: Zhang, Nenling
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: A new kavalactone, 4'-hydroxyl dihydro-5, 6-dehydrokavain (1) was isolated from the petroleum ether partition of leaves of Alpinia zerumbet (Pers.) Burtt. et Smith, together with four known kavalactone dimers, rel-1,trans-3-bis-(4-methoxy-2-oxopyran-6-yl)-cis-2,trans-4-diphenyl cyclobutene (2), aniba dimer A (3), aniba dimer C (4), 6,6'-(3,4-diphenylcyclobutane-1,2-diyl)bis(4-methoxy-2H-pyran-2-one (5). The structure of compound 1 was characterized by its MS, 1D-NMR, and 2D-NMR data, and the structures of the known compounds were determined by comparison of their spectroscopic data with those reported by the literatures. The obtained compounds were evaluated for their protective activities on human umbilical vein endothelial cells (HUVECs) damaged by high glucose (35 mM, cell viability at 70.10%). Compounds 3 and 5 could increase the cell viability at the concentration of 12.5 μΜ (83.12%) and 25 μΜ (75.02%), whereas at the concentration of 12.5 μΜ, compounds 1, 2, and 4 didn’t reverse cell damage (cell viability at 38.58%, 54.80% and 58.16%).
Maximum-likelihood detection of sources among Poissonian noise
Creators: name: Stewart, I. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A maximum likelihood (ML) technique for detecting compact sources in images of the x-ray sky is examined. Such images, in the relatively low exposure regime accessible to present x-ray observatories, exhibit Poissonian noise at background flux levels. A variety of source detection methods are compared via Monte Carlo, and the ML detection method is shown to compare favourably with the optimized-linear-filter (OLF) method when applied to a single image. Where detection proceeds in parallel on several images made in different energy bands, the ML method is shown to have some practical advantages which make it superior to the OLF method. Some criticisms of ML are discussed. Finally, a practical method of estimating the sensitivity of ML detection is presented, and is shown to be also applicable to sliding-box source detection.
description: 17 pages, 10 figures. Accepted by Astronomy & Astrophysics
title: Collapsing the Philosophy/Rhetoric Disjunct: Nietzsche, Plato and the Perspectival Turn
Creators: name: Vankevich, Ned
Publisher: name: Old Dominion University Libraries
Year: 1998

description: Often overlooked within the standard views of academe lie hidden a number of tacit assumptions. Until the time of Nietzsche, the status of rhetoric as a discourse formation in Western intellectual history was often colored by the unflattering view generated by Plato in a number of his dialogues. In this thesis I present a case that revisits Plato and Nietzsche with an eye toward understanding the reasons why these two highly influential figures in contemporary philosophy adopt the views they advocate. In doing so, I attempt to illumine the reason Plato forms a fundamental split between philosophy and rhetoric and how Nietzsche's radical approach to finitude unsettles and collapses this division. I also look at the ethical implications of Nietzsche's accomplishment with an ear toward hearing what may be the next frontier of philosophic speculation-that is, how to fashion an ethic that avoids both hegemony and relativism.
Supplementary monomer feed ratio, 1H NMR, photos of the quaternized copolymers. from Fast formation of a supramolecular ion gel/solvoplastic elastomer with excellent stretchability
Creators: name: Bai, Shishun
name: Wang, Xin
name: Vapaavuori, Jaana
name: He, Xianru
Publisher: name: The Royal Society
Year: 2018

description: Supplementary information
title: Attenuation of myostatin/activin signalling delays skeletal muscle ageing signs in a progeric mouse model
Creators: name: Alyodawi, Khalid
Publisher: name: University of Reading
Year: 2019

description: Accumulation of DNA damage with age induces a stress response that shifts cellular resources from growth towards maintenance. A mouse model with defectsin DNA damage repair, Ercc1Δ/- , has noticeable growth retardation and multisystemic ageing signs. Skeletal muscle wasting, locomotor activity and reduce muscle strength are the most apparentsigns of accelerated ageing in this model. Using anti myostatin as a strategy in health and disease condition offer a unique approach to increase muscle mass or prevent muscle loss. However, it might be a conflict with the output of stress response in the aged and progeric muscle. The hypothesis that we tested here is the maintenance of skeletal muscle growth through attenuation of myostatin/activin signalling in progeric Ercc1Δ/- mice could counteract the effect of DNA damage and stress response and delay signs of ageing. Eight weeks old male mice FVB/C57/Bl6, before the development of progeric features were injected intraperitoneally with sActRIIB. Animal weights were measured weekly. Life was even terminated at 16 weeks before the onset of premature death or animals leaves until the end of life in life span cohort. As a result of myostatin (Mstn) antagonism, there was an increase in body mass in Ercc1 Δ/- and Ercc1+/+ mice. All muscles were heavier in treated progeric and control mice. Muscle mass increase due to increase in CSA of all types of fibres. Antagonism of Mstn attenuates the decline in locomotor activity and muscle strength in progeric mice. However, there was a reduction in activity and strength in control treated mice. Antagonism of Mstn attenuates fibre damage and promotes fibre survival in progeric mice. Supra-normalisation of mechanical force transduction apparatus of progeric muscle by sActRIIB. Partial normalisation of progeric muscle stem cells by sActRIIB was noted. The main findings of this study are the Ercc1Δ/- progeric mouse model shows many features of naturally aged mice in term of sarcopenia. These characteristics were attenuated through the antagonism of Myostatin/Activin signalling, even with a persistent defect in DNA damage repair system. The enhancements were at the level of locomotor activity, muscle strength and delayed parameters of neurodegeneration.
Safe Reinforcement Learning for Grid Voltage Control
Creators: name: Vu, Thanh Long
name: Mukherjee, Sayak
name: Huang, Renke
name: Huang, Qiuhua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Under voltage load shedding has been considered as a standard approach to recover the voltage stability of the electric power grid under emergency conditions, yet this scheme usually trips a massive amount of load inefficiently. Reinforcement learning (RL) has been adopted as a promising approach to circumvent the issues; however, RL approach usually cannot guarantee the safety of the systems under control. In this paper, we discuss a couple of novel safe RL approaches, namely constrained optimization approach and Barrier function-based approach, that can safely recover voltage under emergency events. This method is general and can be applied to other safety-critical control problems. Numerical simulations on the 39-bus IEEE benchmark are performed to demonstrate the effectiveness of the proposed safe RL emergency control.
description: Workshop on Safe and Robust Control of Uncertain Systems at the 35th Conference on Neural Information Processing Systems (NeurIPS) 2021. arXiv admin note: substantial text overlap with arXiv:2103.14186, arXiv:2011.09664, arXiv:2006.12667
title: Institutional entrepreneurship and legitimacy: a case of emerging economies
Creators: name: Baig, Parisa
Publisher: name: University of Reading
Year: 2024

description: This study explores the relationship between institutional entrepreneurship and legitimacy. It looks at how an institutional entrepreneur is able to acquire legitimacy for a novel innovation. The empirical setting is in an emerging economy, because institutions are typically less rigid in emerging economies, and so the likelihood of institutional entrepreneurship occurring is greater, providing more opportunities for experimental observation. While institutional theorists have devoted considerable attention to institutional entrepreneurship in recent years, there has been little focus on exploring the difference between the institutional entrepreneur’s actual creative act and the subsequent need for the entrepreneur to acquire legitimacy for her/his innovation. This study is the first to separate these two components of institutional entrepreneurship. By doing so, the study is then able to investigate three related questions: (1) Is it possible to shed new light on resolving the paradox of embedded agency?, (2) What are the mechanisms of legitimacy acquisition that an institutional entrepreneur uses to get her/his novel idea accepted and approved by the internal and external stakeholders?, and (3) What kind of institutional or ideological preconditions might be necessary for institutional entrepreneurial action to benefit or harm a society in an emerging economy? The study uses a qualitative case study design research based on systematic combining approach for data collection and analysis. The critical case study is the establishment of the first free trade zone in Dubai, UAE, the Jebel Ali Free Zone (JAFZA). Data was collected from 18 semi-structured interviews and several secondary resources detailing the establishment of JAFZA; and analyzed using thematic analysis to explain how the institutional innovation of JAFZA was received and accepted in a society. JAFZA has subsequently gone on to become the core business of the hugely successful DP World group.
High-dimensional continuification control of large-scale multi-agent systems under limited sensing and perturbations
Creators: name: Maffettone, Gian Carlo
name: di Bernardo, Mario
name: Porfiri, Maurizio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper investigates the robustness of a novel high-dimensional continuification control method for complex multi-agent systems. We begin by formulating a partial differential equation describing the spatio-temporal density dynamics of swarming agents. A stable control action for the density is then derived and validated under nominal conditions. Subsequently, we discretize this macroscopic strategy into actionable velocity inputs for the system's agents. Our analysis demonstrates the robustness of the approach beyond idealized assumptions of unlimited sensing and absence of perturbations.
description: arXiv admin note: text overlap with arXiv:2310.01573
Study of the stages of moral development of married couples in an Anglican parish
Creators: name: Hodgkinson, Arthur Douglas
Publisher: name: University of British Columbia
Year: 2011

description: Using the hierarchy of moral judgement stages developed by Lawrence Kohlberg as a theoretical framework, this study investigated the ways that adults make judgements about moral issues. Specifically examined were differences between the stages of moral development of husbands and wives, older and younger respondents, college and non college educated respondents, church attending and non attending respondents and working and non working women. Respondents were sixteen married couples randomly selected from the parish list of St. Faith's Anglican Church, Vancouver. Data were collected by means of a structured interview, the Kohlberg Moral Dilemma Interview, Form A. A qualitative analysis of data from the interviews was done so that judgements of respondents could be assigned to stages in the hierarchy of moral judgements. Data were further analyzed using the Mann Whitney U. test, Wilcoxon Matched Pairs and Chi square. The majority of respondents were found to be at a conventional stage 3 and 4 level of moral judgement with about one quarter able to use principled forms of judgement. Most respondents used a mixture of stage thinking in the resolution of moral dilemmas. Less than one quarter were consistent from stage to stage. Over all, men and women tended to be at the same stage of moral development but husbands and their non working wives were found to be at different stages. Husbands were at stage 4 and their wives stage 3. There were no differences between men and working women. Working women tended to score higher on a test of moral judgement than non working women. They were also better educated. Neither age nor church attendance were found to be related to stages of moral development. Respondents who had completed college scored higher on a test of moral judgement than respondents who had not completed college.
Constraints on dark matter particles charged under a hidden gauge group from primordial black holes
Creators: name: Dai, De-Chang
name: Freese, Katherine
name: Stojkovic, Dejan
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In order to accommodate increasingly tighter observational constraints on dark matter, several models have been proposed recently in which dark matter particles are charged under some hidden gauge group. Hidden gauge charges are invisible for the standard model particles, hence such scenarios are very difficult to constrain directly. However black holes are sensitive to all gauge charges, whether they belong to the standard model or not. Here, we examine the constraints on the possible values of the dark matter particle mass and hidden gauge charge from the evolution of primordial black holes. We find that the existence of the primordial black holes with reasonable mass is incompatible with dark matter particles whose charge to mass ratio is of the order of one. For dark matter particles whose charge to mass ratio is much less than one, we are able to exclude only heavy dark matter in the mass range of 10^(11) GeV - 10^(16) GeV. Finally, for dark matter particles whose charge to mass ratio is much greater than one, there are no useful limits coming from primordial black holes.
description: accepted for publication in JCAP
Simple Alternatives to the Common Correlated Effects Model
Creators: name: Brown, Nicholas L.
name: Schmidt, Peter
name: Wooldridge, Jeffrey M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: We study estimation of factor models in a fixed-T panel data setting and significantly relax the common correlated effects (CCE) assumptions pioneered by Pesaran (2006) and used in dozens of papers since. In the simplest case, we model the unobserved factors as functions of the cross-sectional averages of the explanatory variables and show that this is implied by Pesaran's assumptions when the number of factors does not exceed the number of explanatory variables. Our approach allows discrete explanatory variables and flexible functional forms in the covariates. Plus, it extends to a framework that easily incorporates general functions of cross-sectional moments, in addition to heterogeneous intercepts and time trends. Our proposed estimators include Pesaran's pooled correlated common effects (CCEP) estimator as a special case. We also show that in the presence of heterogeneous slopes our estimator is consistent under assumptions much weaker than those previously used. We derive the fixed-T asymptotic normality of a general estimator and show how to adjust for estimation of the population moments in the factor loading equation.
Weighted low-lying zeros of L-functions attached to Siegel modular forms
Creators: name: Zhao, Shifan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11F46, 11F66, 11F72

description: In this paper, we study weighted low-lying zeros of spinor and standard $L$-functions attached to degree 2 Siegel modular forms. We show the symmetry type of weighted low-lying zeros of spinor $L$-functions is symplectic, for test functions whose Fourier transform have support in $(-1,1)$, extending the previous range $(-\frac{4}{15},\frac{4}{15})$ by E. Kowalski, A. Saha and J. Tsimerman . We then show the symmetry type of weighted low-lying zeros of standard $L$-functions is also symplectic. We further extend the range of support by performing an average over weight. As an application, we discuss non-vanishing of central values of those $L$-functions.
description: 21 pages
Modified l-states of diatomic molecules subject to central potentials plus an angle-dependent potential
Creators: name: Berkdemir, Cuneyt
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present modified $\ell$-states of diatomic molecules by solving the radial and angle-dependent parts of the Schrödinger equation for central potentials, such as Morse and Kratzer, plus an exactly solvable angle-dependent potential $V_θ(θ)/r^2$ within the framework of the Nikiforov-Uvarov (NU) method. We emphasize that the contribution which comes from the solution of the Schrödinger equation for the angle-dependent potential modifies the usual angular momentum quantum number $\ell$. We calculate explicitly bound state energies of a number of neutral diatomic molecules composed of a first-row transition metal and main-group elements for both Morse and Kratzer potentials plus an angle-dependent potential.
description: 19 pages
Measuring layer-dependent CBV fMRI in the visual system
Creators: name: Huber, Laurentius
name: Merriam, Elisha
name: Insub Kim
name: Yuhui Chai
name: Sriranga Kashyap
name: Polimeni, Jonathan
name: Shim, Won Mok
name: Seong-Gi Kim
name: Ivanov, Dimo
name: Poser, Benedikt
name: Bandettini, Peter
Publisher: name: F1000 Research Limited
Year: 2019

description: With recent developments of ultra-high field MRI and high-resolution CBV-sensitive VASO sequences, it became possible to measure activity
changes across cortical depths in brain areas of large cortical thicknesses (4mm in M1). Applications of layer-dependent CBV-fMRI in the visual cortex, however, have been complicated by long arterial-arrival-times, coverage requirements, and lower cortical thickness (1.9mm). Here, we developed new sequence setups for layer-dependent acquisition of CBV changes during tasks and resting-state. We find that the proposed large- coverage VASO protocols with 0.8mm (iso) resolutions can pinpoint feedforward and feedback input into V1 from LGN and V5 during tasks and resting-state.
obscura: A modular C++ tool and library for the direct detection of (sub-GeV) dark matter via nuclear and electron recoils
Creators: name: Emken, Timon
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For the interpretation of past and future direct searches for dark matter (DM) particles, it is important to be able to provide accurate predictions for event rates and spectra under a variety of possible and viable assumptions in a computationally efficient way. While there exists a few tools to compute DM induced nuclear recoil spectra, 'obscura' is not limited to nuclear targets. Instead its main focus lies on sub-GeV DM searches probing electron recoils which typically requires methods from atomic and condensed matter physics. In the context of sub-GeV DM searches, new ideas such as target materials or detection techniques are being proposed regularly, and the theoretical modelling of these are getting improved continuously. At the same time, currently running experiments continue to publish their results and analyses, setting increasingly strict bounds on the DM parameter space. In such a dynamic field, 'obscura' can be an invaluable tool due to its high level of adaptability and facilitate and accelerate the development of new, reliable research software for the preparation of a DM discovery in the hopefully near future.
description: 5 pages, 2 figures. The code can be found under https://github.com/temken/obscura , version 1.0.0 is archived under https://zenodo.org/record/5665890 . Documentation can be found under https://obscura.readthedocs.io/en/latest/index.html
Colors and Kinematics of L Dwarfs From the Sloan Digital Sky Survey
Creators: name: Schmidt, Sarah J.
name: West, Andrew A.
name: Hawley, Suzanne L.
name: Pineda, J. Sebastian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a sample of 484 L dwarfs, 210 of which are newly discovered from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic database. We combine this sample with known L dwarfs to investigate their $izJHK_S$ colors. Our spectroscopically selected sample has $\sim$0.1 magnitude bluer median $J-K_S$ colors at a given spectral type (for L0 to L4) than previously known L dwarfs, which reflects a bias towards redder L dwarfs in past selection criteria. We present photometric distance relations based on $i-z$ and $i-J$ colors and derive distances to our L dwarf sample. We combine the distances with SDSS/2MASS proper motions in order to examine the tangential velocities. For the majority of our spectroscopic sample, we measured radial velocities and present three dimensional kinematics. We also provide H$α$ detections for the fraction of our sample with sufficient quality spectra. Comparison of the velocities of our L dwarf sample to a kinematic model shows evidence for both cold and hot dynamical populations, consistent with young and old disk components. The dispersions of these components are similar to those found for M dwarfs. We also show that $J-K_S$ color is correlated with velocity dispersion, confirming a relationship between $J-K_S$ color and age.
description: 58 pages, 11 figures, 8 tables, accepted for publication in the Astronomical Journal
Robust chaos with variable Lyapunov exponent in smooth one-dimensional maps
Creators: name: Aguirregabiria, Juan M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present several new easy ways of generating smooth one-dimensional maps displaying robust chaos, i.e., chaos for whole intervals of the parameter. Unlike what happens with previous methods, the Lyapunov exponent of the maps constructed here varies widely with the parameter. We show that the condition of negative Schwarzian derivative, which was used in previous works, is not a necessary condition for robust chaos. Finally we show that the maps constructed in previous works have always the Lyapunov exponent $\ln 2$ because they are conjugated to each other and to the tent map by means of smooth homeomorphisms. In the methods presented here, the maps have variable Lyapunov coefficients because they are conjugated through non-smooth homeomorphisms similar to Minkowski's question mark function.
description: 6 pages, 9 figures
Bylaw Provisions for Selecting Directors of Major Regional Farmer Cooperatives
Creators: name: Hulbert, Helim H.
name: Volkin, David
name: Griffin, Nelda
name: Hulbert, Helim H.
name: Volkin, David
name: Griffin, Nelda
Publisher: name: Unknown
Year: 1960
Subjects: Agribusiness
Industrial Organization
Labor and Human Capital

description: Excerpts from the report: This report covers the first phase of a broad, general examination of the selection, election, and performance of directors of major regional farmer cooperatives. Another part of the study will report on the duties and responsibilities of directors as appraised by managers and as reported by directors themselves. A third section of this project will describe the experience of cooperatives with director committees and will appraise their use as a management tool. This report is a review and analysis of bylaw provisions pertaining to the selection, qualification, and nomination of directors of major regional farmer cooperatives. It also covers voting rights and balloting methods that members employ in choosing their directors. The bylaws of 107 major regional farmer cooperatives marketing farm products, purchasing farm supplies, and furnishing farm business services are the basis for this study.
Role of gravitational decoupling on isotropization and complexity of self-gravitating system under complete geometric deformation approach
Creators: name: Maurya, S. K.
name: Nag, Riju
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the present paper, we discuss the role of gravitational decoupling to isotropize the anisotropic solution of Einstein's field equations in the context of the complete geometric deformation (CGD) approach and its influence on the complexity factor introduced by L. Herrera (Phys. Rev. D 97, 044010 (2018)) in the static self-gravitating system. Moreover, we also proposed a simple and effective technique to generate new solutions for self-gravitating objects via CGD approach by using two systems with the same complexity factor and vanishing complexity factor proposed by Casadio et al. Eur. Phys. J. C 79, 826 (2019). The effect of decoupling constant and the compactness on the complexity factor have been also analyzed for the obtained solutions.
description: 5
Size effects in statistical fracture
Creators: name: Alava, Mikko J.
name: Nukala, Phani K. V. V.
name: Zapperi, Stefano
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We review statistical theories and numerical methods employed to consider the sample size dependence of the failure strength distribution of disordered materials. We first overview the analytical predictions of extreme value statistics and fiber bundle models and discuss their limitations. Next, we review energetic and geometric approaches to fracture size effects for specimens with a flaw. Finally, we overview the numerical simulations of lattice models and compare with theoretical models.
description: review article 19 pages, 5 figures