cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exact Learning Augmented Naive Bayes Classifier
Creators: name: Sugahara, Shouta
name: Ueno, Maomi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Earlier studies have shown that classification accuracies of Bayesian networks (BNs) obtained by maximizing the conditional log likelihood (CLL) of a class variable, given the feature variables, were higher than those obtained by maximizing the marginal likelihood (ML). However, differences between the performances of the two scores in the earlier studies may be attributed to the fact that they used approximate learning algorithms, not exact ones. This paper compares the classification accuracies of BNs with approximate learning using CLL to those with exact learning using ML. The results demonstrate that the classification accuracies of BNs obtained by maximizing the ML are higher than those obtained by maximizing the CLL for large data. However, the results also demonstrate that the classification accuracies of exact learning BNs using the ML are much worse than those of other methods when the sample size is small and the class variable has numerous parents. To resolve the problem, we propose an exact learning augmented naive Bayes classifier (ANB), which ensures a class variable with no parents. The proposed method is guaranteed to asymptotically estimate the identical class posterior to that of the exactly learned BN. Comparison experiments demonstrated the superior performance of the proposed method.
description: 29 pages
Η συμβολή της νομολογίας του Συμβουλίου της Επικρατείας στην εξέλιξη των εκκλησιαστικών δικαστηρίων
Creators: name: Παναγιωτίδου, Δέσποινα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2025
Subjects: Εκκλησιαστικά δικαστήρια
Νόμος 5383/1932
Νομολογία ΣτΕ
Ecclesiastical courts
Law no 5383/1932
Case law of the Council of State

description: Το ζήτημα του δικαστικού ελέγχου των πράξεων και αποφάσεων των αποκαλουμένων «Εκκλησιαστικών Δικαστηρίων», είναι το βασικό αντικείμενο της παρούσας μελέτης. Σχετικώς εξετάζονται μια σειρά συναφών ζητημάτων, μεταξύ των οποίων, είναι η νομική προσωπικότητα των εκκλησιαστικών οργανισμών και η υπαγωγή αυτών στον δημόσιο τομέα καθώς και η ίδια η νομική φύση των προβλεπομένων υπό του ν. 5383/1932 μονοπρόσωπων ή συλλογικών οργάνων. Τέλος επιχειρείται η παρουσίαση και κριτική επισκόπηση της σχετικής νομολογίας του Συμβουλίου της Επικρατείας, η συμβολή της οποίας στην αποκρυστάλλωση μιας σειράς εκκλησιαστικών θεσμών υπήρξε καθοριστική.
description: The question of judicial review of the acts and decisions of the so-called "ecclesiastical courts" is the main subject of the present study. In this regard, a number of related issues are examined, including the legal personality of ecclesiastical organisations and their inclusion in the public sector, as well as the actual legal nature of the judicial powers provided for by Law No. 5383/1932. Finally, an attempt is made to present and critically review the relevant case law of the Council of State, whose contribution to the crystallisation of a number of ecclesiastical institutions has been decisive.
Investigating the flyby scenario for the HD 141569 system
Creators: name: Reche, Rémy
name: Beust, Hervé
name: Augereau, J. -C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: HD 141569, a triple star system, has been intensively observed and studied for its massive debris disk. It was rather regarded as a gravitationally bound triple system but recent measurements of the HD 141569A radial velocity seem to invalidate this hypothesis. The flyby scenario has therefore to be investigated to test its compatibility with the observations. We present a study of the flyby scenario for the HD141569 system, by considering 3 variants: a sole flyby, a flyby associated with one planet and a flyby with two planets. We use analytical calculations and perform N-body numerical simulations of the flyby encounter. The binary orbit is found to be almost fixed by the observational constraint on a edge-on plane with respect to the observers. If the binary has had an influence on the disk structure, it should have a passing time at the periapsis between 5000 and 8000 years ago and a distance at periapsis between 600 and 900 AU. The best scenario for reproducing the disk morphology is a flyby with only 1 planet. For a 2 Mj (resp. 8 Mj) planet, its eccentricity must be around 0.2 (resp. below 0.1). In the two cases, its apoapsis is about 130 AU. Although the global disk shape is reasonably well reproduced, some features cannot be explain by the present model and the likehood of the flyby event remains an issue. Dynamically speaking, HD 141569 is still a puzzling system.
Islamismus in Indonesien - Der Erfolg der Gerechtigkeits- und Wohlfahrtspartei und seine möglichen Auswirkungen
Creators: name: Heilmann, Matthias
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2008

description: The 2004 parliamentary elections in Indonesia delivered some striking results. Among these, the enormous success of the islamist Justice and Welfare Party (PKS) represents one of the most interesting developments of Indonesia‘s young democracy. Having increased their number of MPs by over 500 percent (from 7 to 45), the PKS is now considered to be a rising political power which is decidedly promoting an Islamic agenda. Now arousing public interest, the party has become an object of analysis by domestic and international observers, which come to an array of different conclusions and judgements about this apparently controversial party. The success of the PKS is based on its populistic political communication which aims at establishing the image of a moderate and pragmatic party of problem-solvers, and its social welfare programs. But this is only one view at the PKS, as it also appears as a cadre party of strict ideologists that are obviously borrowing their basic ideas from the Muslim Brothers. Thus, it is this Janus face that might encourage differing judgements about the PKS.
description: Austrian Journal of South-East Asian Studies, Vol 1 No 1 (2008): Islam in South-East Asia
Kunst, Kosmos, Kaste. Weibliche Körperinszenierungen, Tanz und Aspekte der Bewahrung balinesischer Kultur in Oka Rusminis Tarian Bumi
Creators: name: Arnez, Monika
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2008

description: An increasing number of Indonesian women authors have entered the literary stage since the fall of Suharto. Many of their books have become bestsellers, selling up to 100.000 copies. Reasons for this rising popularity of literature by women authors are tendencies of liberalization, lifting of censorship and a redefinition of women’s role. Some female authors have attracted attention by openly discussing female sexuality and desire, a taboo topic, which would not have been able to discuss during the New Order. Most of these writers, whose literature is often termed sastrawangi (fragrant literature), choose urban centres of Java as settings for their narratives. This paper discusses the novel Tarian Bumi (Earth Dance, 2000) by Oka Rusmini, who has opened the discourse about the female body and sexuality even before the ‘pioneer’ of so-called sastrawangi, Ayu Utami. The paper wants to contribute to point out links between female stagings of the body, dance and aspects of preserving Balinese culture. The paper directs special attention to the question, how stagings of the body are used to characterize women’s role in Balinese society between the poles of the Hindu caste system and hierarchy and against the backdrop of tourism, postcolonial criticism and preservation of Balinese culture in the course of time.
description: Austrian Journal of South-East Asian Studies, Vol 1 No 1 (2008): Islam in South-East Asia
Acetylcholinesterase and the basal ganglia : from cytology to function
Creators: name: Lehmann, John
Publisher: name: University of British Columbia
Year: 2010

description: Biochemical, anatomical, and histochemical studies were performed in the basal ganglia with an emphasis on the localization of the enzyme acetylcholinesterase (AChE). The existence of the enzyme in dopaminergic nigro-striatal neurons was demonstrated. Descending striato-nigral and pallido-nigral axons did not contain detectable amounts of AChE. A cell group called the nucleus basalis magno-cellularis, intimately associated with the globus pallidus, was found to contain high levels of AChE; furthermore, these neurons were shown to be the source of a cholinergic projection to the neocortex. In the striatum, large neurons containing high levels of AChE were found to be likely candidates as..the cholinergic neuron of the striatum. Cholinergic perikarya were found to be absent in the neocortex; nor were perikarya synthesizing large amounts of AChE found in the neocortex. An empirical hypothesis was formulated on the basis of these and other findings regarding cholinergic neurons: High levels of AChE are a necessary but not sufficient criterion for identifying cholinergic perikarya.
"We are Living in a Different Time Zone" Transnational Working Places and the Concept of a "Glocalized Intermediary Class"
Creators: name: Reese, Niklas
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2008

description: The article would like to make a proposition on how to amend the underdifferentiated way social stratification within the “global society” is usually theoretized. In the dominant discourse there seems to be only one global class, the “winners of globalization”. Critics of this narrative, which I call the cosmopolitan delusion, make the “losers” of neoliberal globalization visible. But the “vulnerable” (Robert Castel) and precarious are usually not included in such a dualistic two-classapproach. If the middle class(es) within societies of the Global South again are mentioned, this is usually done in simplifi ed way. I would like to introduce the concept of a “glocalized intermediary class” (GIC) to better capture the social location of transnational class positions in between societies of the Global North and the Global South. The GICs can be considered to be part of the (service or white collar) proletariat of the North but at the same time to be part of the middle class in the society of their origin (in this case: the Philippines). If the middle class(es) can be understood as a “contradictory class location” (Goldthorpe), this is even intensifi ed for GICs working and living in between the worlds and the class positions. The exploratory theory of a “glocalized intermediary class” is exemplifi ed by the agents working at international call centers in the Philippines. They are working at transnational working places and can be considered sociocultural migrants.
description: Austrian Journal of South-East Asian Studies, Vol 1 No 2 (2008): (In-)Equalities in South-East Asia
Im Gespräch mit Marco Bünte
Creators: name: Weiss, Simon
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2009

description: Dr. Marco Bünte, geboren 1970, ist wissenschaftlicher Mitarbeiter für die Politik Südostasiens am GIGA Institut für Asien-Studien in Hamburg und Mitherausgeber des Journal of Current Southeast Asian Aff airs (früher Südostasien aktuell). Seine Forschungsschwerpunkte sind Entwicklungen von Demokratisierung, Dezentralisierung und politischen Konfl ikten, u.a. in Thailand, Indonesien und Myanmar.
description: Austrian Journal of South-East Asian Studies, Vol 2 No 1 (2009)
The Association of Southeast Asian Nations’ (ASEAN) Conflict Management Approach Revisited: Will the Charter Reinforce ASEAN’s Role?
Creators: name: Amer, Ramses
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2009

description: The main aim of this study is to assess the role played by the Association of Southeast AsianNations (ASEAN) in the management and resolution of disputes between its member-states in the South-East Asian region. The ASEAN approach to confl ict management is outlined and the context in which it has developed is presented. The achievements and challenges that ASEAN has faced and is still facing in the fi eld of confl ict management are identifi ed. ASEAN’s contribution to confl ict management in the South-East Asian region is recognized, although the nature of the contribution and the role played by the Association is debated. ASEAN’s model and approachto confl ict and dispute management and the possible impact of the approach on the confl ictsituation in the South-East Asian region are examined from three main dimensions: (1) the coreelements of the approach; (2) the role played by the Association in terms of confl ict management;(3) the possible impact of the ASEAN approach in managing disputes among its member-states.The possible impact of recent developments within ASEAN – the ASEAN Charter in particular – isanalyzed in assessing the role that the Association can play in promoting confl ict management.
description: Austrian Journal of South-East Asian Studies, Vol 2 No 2 (2009)
Low-Frequency 1/f Noise Characteristics of Ultra-Thin AlO$_{x}$-Based Resistive Switching Memory Devices with Magneto-Resistive Responses
Creators: name: Hong, Jhen-Yong
name: Chen, Chun-Yen
name: Ling, Dah-Chin
name: Martínez, Isidoro
name: González-Ruano, César
name: Aliev, Farkhad G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Low-frequency 1/f voltage noise has been employed to probe stochastic charge dynamics in AlO$_{x}$-based non-volatile resistive memory devices exhibiting both resistive switching (RS) and magneto-resistive (MR) effects. A 1/f$^γ$ noise power spectral density is observed in a wide range of applied voltage biases. By analyzing the experimental data within the framework of Hooge's empirical relation, we found that the Hooge's parameter $α$ and the exponent $γ$ exhibit a distinct variation upon the resistance transition from the low resistance state (LRS) to the high resistance state (HRS), providing strong evidence that the electron trapping/de-trapping process, along with the electric field-driven oxygen vacancy migration in the AlO$_x$ barrier, plays an essential role in the charge transport dynamics of AlO$_x$-based RS memory devices.
Gravitational Lenses in Generalized Einstein-Aether theory: the Bullet Cluster
Creators: name: Dai, De-Chang
name: Matsuo, Reijiro
name: Starkman, Glenn
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the lensing properties of an asymmetric mass distribution and vector field in Generalized Einstein-Aether (GEA) theory. As vector field fluctuations are responsible in GEA for seeding baryonic structure formation, vector field concentrations can exist independently of baryonic matter. Such concentrations would not be expected to be tied to baryonic matter except gravitationally, and so, like dark matter halos, would become separated from baryonic matter in interacting systems such as the Bullet Cluster. These vector field concentrations cause metric deviations that affect weak lensing. Therefore, the distribution of weak lensing deviates from that which would be inferred from the luminous mass distribution, in a way that numerical calculations demonstrate can be consistent with observations. This suggests that MOND-inspired theories can reproduce weak lensing observations, but makes clear the price: the existence of a coherent large-scale fluctuation of a field(s) weakly tied to the baryonic matter, not completely dissimilar to a dark matter halo.
description: 7 pages, 10 figures
Geodesic Properties and Orbits in 5-dimensional Hypercylindrical Spacetime
Creators: name: Gwak, Bogeun
name: Lee, Bum-Hoon
name: Lee, Wonwoo
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the geodesic motions of a massive particle and light ray in the hyperplane orthogonal to the symmetry axis in the 5-dimensional hypercylindrical spacetime. The class of the solutions depends on one constant a which is the ratio of string mass density and tension. There exist unstable orbits in null geodesic only in some range of a. The innermost stable circular orbits in timelike geodesic also exist only in a certain range of the parameter a. The capture cross section and the deflection angle of light ray are also computed.
description: 17 pages, 10 figures, 4 tables, minor corrected and reference added
A Tannaka Theorem for Proper Lie Groupoids
Creators: name: Trentinaglia, Giorgio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 58H05, 18D10

description: By replacing the category of smooth vector bundles over a manifold with the category of what we call smooth Euclidean fields, which is a proper enlargement of the former, and by considering smooth actions of Lie groupoids on smooth Euclidean fields, we are able to prove a Tannaka duality theorem for proper Lie groupoids. The notion of smooth Euclidean field we introduce here is the smooth, finite dimensional analogue of the usual notion of continuous Hilbert field.
description: 47 pages
Electrostatic and electrokinetic contributions to the elastic moduli of a driven membrane
Creators: name: Lacoste, D.
name: Menon, G. I.
name: Bazant, M. Z.
name: Joanny, J. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We discuss the electrostatic contribution to the elastic moduli of a cell or artificial membrane placed in an electrolyte and driven by a DC electric field. The field drives ion currents across the membrane, through specific channels, pumps or natural pores. In steady state, charges accumulate in the Debye layers close to the membrane, modifying the membrane elastic moduli. We first study a model of a membrane of zero thickness, later generalizing this treatment to allow for a finite thickness and finite dielectric constant. Our results clarify and extend the results presented in [D. Lacoste, M. Cosentino Lagomarsino, and J. F. Joanny, Europhys. Lett., {\bf 77}, 18006 (2007)], by providing a physical explanation for a destabilizing term proportional to $\kps^3$ in the fluctuation spectrum, which we relate to a nonlinear ($E^2$) electro-kinetic effect called induced-charge electro-osmosis (ICEO). Recent studies of ICEO have focused on electrodes and polarizable particles, where an applied bulk field is perturbed by capacitive charging of the double layer and drives flow along the field axis toward surface protrusions; in contrast, we predict "reverse" ICEO flows around driven membranes, due to curvature-induced tangential fields within a non-equilibrium double layer, which hydrodynamically enhance protrusions. We also consider the effect of incorporating the dynamics of a spatially dependent concentration field for the ion channels.
description: 22 pages, 10 figures. Under review for EPJE
Regional Conflict Management: Challenges of the Border Disputes of Cambodia, Laos, and Vietnam
Creators: name: Amer, Ramses
name: Thao, Nguyen Hong
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2009

description: This study analyzes the border disputes of Cambodia, Laos, and Vietnam, respectively. Both settled and unsettled disputes are encompassed. The study outlines the settlements reached and the remaining unsettled disputes. Furthermore, the broader trends in managing the border disputes are analyzed and remaining challenges, both in implementing agreements and in managing the unsettled disputes, are addressed. So are the implications for regional conflict management. The study displays that both Laos and Vietnam have made considerable progress in both managing and settling their existing border disputes, whereas Cambodia has thus far been less successful.
description: Austrian Journal of South-East Asian Studies, Vol 2 No 2 (2009)
Flavor asymmetry of the nucleon
Creators: name: Bijker, R.
name: Santopinto, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The flavor asymmetry of the nucleon sea is discussed in an unquenched quark model for baryons in which the effects of quark-antiquark pairs (u anti-u, d anti-d and s anti-s) are taken into account in an explicit form. The inclusion of q anti-q pairs leads automatically to an excess of anti-d over anti-u quarks in the proton, in agreement with experimental data.
description: 5 pages, 3 figures, 1 table. Invited talk at XXXI Symposium on Nuclear Physics, Cocoyoc, Morelos, Mexico, January 7-10, 2008. Revista Mexicana de Fisica S (2008), in press
Study of tau- --> V P- nu(tau) in the framework of resonance chiral theory
Creators: name: Guo, Zhi-Hui
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we study two kinds of tau decays: (a) tau- --> (rho pi-,omega pi-, phi pi-, K*0 K-) nu(tau), which belong to Delta S=0 processes and (b) Delta S = 1 processes, like tau- --> (rho K-, omega K-, phi K-, \bar{K*0} pi-) nu(tau), in the framework of resonance chiral theory. We fit the tau- --> omega pi- nu(tau) spectral function and the invariant mass distribution of omega K in the process of tau- --> omega K- nu(tau) to get the values of unknown resonance couplings. Then we make a prediction for branching ratios of all channels.
description: Published version; References added. 20 pages, 3 figures, 2 tables
Thailand in the Face of the 1997 Asian Crisis and the Current Financial Crisis: An Interview With Johannes Dragsbæk Schmidt
Creators: name: Scharinger, Julia
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2010

description: Johannes Dragsbæk Schmidt studied International Relations and Development Studies at Aalborg University, Denmark. Since 1993, he has been Associate Professor in the Department of History, International and Social Studies. Prof Dragsbæk Schmidt has held visiting research fellowships in Australia, Thailand, Malaysia, Indonesia, the Philippines and Poland, and was a Visiting Professor at the Institute for Political Economy, Carleton University, Canada in 2009. Additionally he has been a consultant to UNESCO, the World Bank and the Irish Development Agency. Prof Dragsbæk Schmidt has a broad spectrum of research interests, varying from globalisation and international division of labour via refugees and human rights to social and welfare policy and state regulations with a focus on East and South-East Asia.
description: Austrian Journal of South-East Asian Studies, Vol 3 No 1 (2010)
An Alternative Policy Proposal for the Provinces Populated by the Malay Ethnonationality in the South of Thailand.
Creators: name: Von Feigenblatt, Otto F.
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2011

description: This article provides a public policy analysis of governance in the provinces populated by the Malay ethnonationality in the South of Thailand. Important stakeholders are identifi ed as well as important sociopolitical environmental factors. The fi nal sections of the paper present a proposal for a new governance structure for the Muslim South of Thailand taking into consideration the social, cultural, and economic context as well as the wellbeing and right to self-determination of the local population. This study concludes that considerable economic, political, and social opportunities for development are being lost in the South of Thailand due to misguided governance policies.
description: Austrian Journal of South-East Asian Studies, Vol 4 No 1 (2011): Tourism
Contesting State Forests in Post-Suharto Indonesia: Authority Formation, State Forest Land Dispute, and Power in Upland Central Java, Indonesia
Creators: name: Lounela, Anu
Publisher: name: Austrian Journal of South-East Asian Studies
Year: 2012

description: This article explores the ongoing conflict over state forest land between the local population and the State Forestry Corporation (SFC) in a village in upland Central Java with regard to authority formation. It looks at how different agents draw on diff erent sources of authority in the course of the conflict and its negotiations. The principal questions are to what kind of sources of authority villagers refer to and how the formation of authority informs the relations between the state and society in the land dispute. The article is based on 11 months of ethnographic fieldwork and focuses on the central fi gure of Pak Wahid who took a leading position in the forest land dispute and in mobilising peasants in the village. The article argues that in post-Suharto Java, leadership in the struggle for state forest land at the village level is embedded in the interaction of Javanese ideas of power and authority as well as administrative authority. Due to political and institutional reforms, new sources of authority could be invoked while there are no real changes in the power relations within the village or between the SFC and the villagers.
description: Austrian Journal of South-East Asian Studies, Vol 5 No 2 (2012): Environment
An empirical investigation of dyadic verbal interaction in the chronic paediatric health care delivery system
Creators: name: MacKinnon, Joyce Roberta
Publisher: name: University of British Columbia
Year: 2010

description: The primary objective of this study was to analyze dyadic verbal interactions and to determine whether they were associated with the roles of the participants. These "interactions occurred in the chronic paediatric health care delivery system between parents of handicapped children and physicians and between those same parents and other members of the health team. Additional objectives of this research included testing of the reliability of the Sequential Analysis of Verbal Interaction (SAVI) instrument and its utility in the health care system. Clinical data were obtained during regularly scheduled appointments in the form of audio-taped interviews using 37 parent-professional 'and 37 parent-paraprofessional dyads. A six-minute sample was selected from each interview tape, coded at three-second intervals, transcribed into the class of communication behaviour and analyzed. Subsequent to data collection, reliability and utility of the SAVI instrument were examined and determined to be appropriate for this study. The major finding of the study was that parents of handicapped children used different verbal messages and behaviours than professionals and paraprofessionals. The communication pattern for all three groups, using Agazarian's (1968) model was cross-purpose. Under a proposed model, adapted from Agazarian's, the parents' pattern of communication was considered to approximate the problem-solving pattern more closely. The conclusion drawn from this exploratory study was that very little of a personal nature was occurring in interpersonal communication, which in turn hindered the development of a problem-solving pattern of communication. An important direction for further research would be the testing of the predominance of the cross-purpose pattern of communication using a larger and more homogenous sample of professionals and paraprofessionals.
Essential cohomology for elementary abelian p-groups
Creators: name: Aksu, Fatma Altunbulak
name: Green, David J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20J06 (Primary) 13A50, 55S10 (Secondary)

description: For an odd prime p the cohomology ring of an elementary abelian p-group is polynomial tensor exterior. We show that the ideal of essential classes is the Steenrod closure of the class generating the top exterior power. As a module over the polynomial algebra, the essential ideal is free on the set of Mui invariants.
description: 10 pages
Electron Transport in Silicon Nanowires: The Role of Acoustic Phonon Confinement and Surface Roughness Scattering
Creators: name: Ramayya, E. B.
name: Vasileska, D.
name: Goodnick, S. M.
name: Knezevic, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the effects of electron and acoustic-phonon confinement on the low-field electron mobility of thin square silicon nanowires (SiNWs) that are surrounded by SiO$_2$ and gated. We employ a self-consistent Poisson-Schrödinger-Monte Carlo solver that accounts for scattering due to acoustic phonons (confined and bulk), intervalley phonons, and the Si/SiO$_2$ surface roughness. The wires considered have cross sections between 3 $\times$ 3 nm$^2$ and 8 $\times$ 8 nm$^2$. For larger wires, as expected, the dependence of the mobility on the transverse field from the gate is pronounced. At low transverse fields, where phonon scattering dominates, scattering from confined acoustic phonons results in about a 10% decrease of the mobility with respect to the bulk phonon approximation. As the wire cross-section decreases, the electron mobility drops because the detrimental increase in both electron--acoustic phonon and electron--surface roughness scattering rates overshadows the beneficial volume inversion and subband modulation. For wires thinner than 5 $\times$ 5 nm$^2$, surface roughness scattering dominates regardless of the transverse field applied and leads to a monotonic decrease of the electron mobility with decreasing SiNWs cross section.
description: 13 pages, 9 figures, Revtex
Ground-state properties of the two-site Hubbard-Holstein model: an exact solution
Creators: name: Zhang, Yu-Yu
name: Liu, Tao
name: Chen, Qing-Hu
name: Wang, Xiaoguang
name: Wang, Kelin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We revisit the two-site Hubbard-Holstein model by using extended phonon coherent states. The nontrivial singlet bipolaron is studied exactly in the whole coupling regime. The ground-state (GS) energy and the double occupancy probability are calculated. The linear entropy is exploited successfully to quantify bipartite entanglement between electrons and their environment phonons, displaying a maximum entanglement of the singlet-bipolaron in strong coupling regime. A dramatic drop in the crossover regime is observed in the GS fidelity and its susceptibility. The bipolaron properties is also characterized classically by correlation functions. It is found that the crossover from a two-site to single-site bipolaron is more abrupt and shifts to a larger electron-phonon coupling strength as electron-electron Coulomb repulsion increases.
description: 6 pages, 6 figures
Stimulated Raman Adiabatic Passage in Tm$^{3+}$:YAG
Creators: name: Alexander, A. L.
name: Lauro, R.
name: Louchet, A.
name: Chanelière, T.
name: Gouët, J. L. Le
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the experimental demonstration of stimulated Raman adiabatic passage (STIRAP) in a Tm$^{3+}$:YAG crystal. Tm$^{3+}$:YAG is a promising material for use in quantum information processing applications, but as yet there are few experimental investigations of coherent Raman processes in this material. We investigate the effect of inhomogeneous broadening and Rabi frequency on the transfer efficiency and the width of the two-photon spectrum. Simulations of the complete Tm$^{3+}$:YAG system are presented along with the corresponding experimental results.
description: 11 pages, 14 figures
Fluctuating temperature outside superstatistics: thermodynamics of small systems
Creators: name: Davis, Sergio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The existence of fluctuations of temperature has been a somewhat controversial topic in thermodynamics but nowadays it is recognized that they must be taken into account in small, finite systems. Although for nonequilibrium steady states superstatistics is becoming the \textit{de facto} framework for expressing such temperature fluctuations, some recent results put into question the idea of temperature as a phase space observable. In this work we present and explore the statistics that describes a part of an isolated system, small enough to have well-defined uncertainties in energy and temperature, but lacking a superstatistical description. These results motivate the use of the so-called fundamental temperature as an observable and may be relevant for the statistical description of small systems in physical chemistry.
Completely Positive Maps: Pro-C*-algebras and Hilbert modules over Pro-C*-algebras
Creators: name: Amin, Bhumi
name: Golla, Ramesh
Publisher: name: arXiv
Year: 2024
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: Primary: 46L05, 46L08, Secondary: 46K10

description: In this paper, we begin by presenting a construction for induced representations of Hilbert modules over pro-$C^*$-algebras for a given continuous $^*$-morphism between pro-$C^*$-algebras. Subsequently, we describe the structure of completely positive maps between two pro-$C^*$-algebras using Paschke's GNS construction for CP-maps on pro-$C^*$-algebras. Furthermore, through our construction, we establish a structure theorem for a $ϕ-$map between two Hilbert modules over pro-$C^*$-algebras, where $ϕ$ is a continuous CP-map between pro-$C^*$-algebras. We also discuss the minimality of these representations.
description: Accepted in the Journal Positivity
Medium dependence of multiplicity distributions in MLLA
Creators: name: Armesto, N.
name: Pajares, C.
name: Quiroga-Arias, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the modification of the multiplicity distributions in MLLA due to the presence of a QCD medium. The medium is introduced though a multiplicative constant ($f_{med}$) in the soft infrared parts of the kernels of QCD evolution equations. Using the asymptotic ansatz for quark and gluons mean multiplicities $=e^{γy}$ and $=r^{-1}e^{γy}$ respectively, we study two cases: fixed $γ$ as previously considered in the literature, and fixed $α_s$. We find opposite behaviors of the dispersion of the multiplicity distributions with increasing $f_{med}$ in both cases. For fixed $γ$ the dispersion decreases, while for fixed $α_s$ it increases.
description: LaTeX, 9 pages, 4 eps figures; proceedings of the 3rd International Conference on Hard and Electromagnetic Probes in High-Energy Nuclear Collisions - Hard Probes 2008 (Illa de A Toxa, Spain, June 8th-14th 2008)
A triplet of the only pulsation mode detected in the DAV star G132-12
Creators: name: Su, Wen-Chao
name: Fu, Jian-Ning
name: Chen, Jian-Xing
name: Fox-Machado, Lester
name: Zhao, Shi-Jie
name: Ayala-Loera, Carmen
name: Wang, Jiang-Tao
name: Pan, Yang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Hydrogen atmosphere pulsating white dwarfs, also known as DAV stars, are the most abundant type of pulsating white dwarfs. High-temperature DAV stars exhibit in general a small number of pulsation modes and stable frequencies. G132-12 is one of the pulsating hydrogen atmosphere white dwarf stars which lies close to the blue edge of the instability strip. Previous researches reported that G132-12 might have only one pulsation mode with the period of 212.69 s. To study the pulsation properties of G132-12 in detail, we carried out a bi-site observation campaign in October 2019. Time series photometric data were collected during around 154 hours in total. A Fourier Analysis reveals 3 frequencies which are identified as the triplet of a $l = 1$ g-mode pulsation with the period of 212.499 s. The rotational period is derived as $P_{rot} = 35.0\pm6.7$ hours and the inclination of the rotational axis to the line of sight is $70^{\circ}$. G132-12 could be an ideal target for measuring the cooling scale of this white dwarf star with only one excited pulsation mode detected.
Cosmological scalar fields that mimic the $ΛCDM$ cosmological model
Creators: name: Zhdanov, V. I.
name: Ivashchenko, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We look for cosmologies with a scalar field (dark energy without cosmological constant), which mimic the standard $ΛCDM$ cosmological model yielding exactly the same large-scale geometry described by the evolution of the Hubble parameter (i.e. photometric distance and angular diameter distance as functions on $z$). Asymptotic behavior of the field solutions is studied in the case of spatially flat Universe with pressureless matter and separable scalar field Lagrangians (power-law kinetic term + power-law potential). Exact analytic solutions are found in some special cases. A number of models have the field solutions with infinite behavior in the past or even singular behavior at finite redshifts. We point out that introduction of the cosmological scalar field involves some degeneracy leading to lower precision in determination of $Ω_m$. To remove this degeneracy additional information is needed beyond the data on large-scale geometry.
description: VIII International Conference "Relativistic Astrophysics, Gravitation and Cosmology": May 21-23, 2008, Kyiv, Ukraine
Non-Abelian bundles on heterotic non-compact K3 orbifold blowups
Creators: name: Nibbelink, Stefan Groot
name: Correia, Filipe Paccetti
name: Trapletti, Michele
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Instantons on Eguchi-Hanson spaces provide explicit examples of stable bundles on non-compact four dimensional C^2/Z_n orbifold resolutions with non-Abelian structure groups. With this at hand, we can consider compactifications of ten dimensional SO(32) supergravity (arising as the low energy limit of the heterotic string) on the resolved spaces in the presence of non-Abelian bundles. We provide explicit examples in the resolved C^2/Z_3 case, and give a complete classification of all possible effective six dimensional models where the instantons are combined with Abelian gauge fluxes in order to fulfil the local Bianchi identity constraint. We compare these models with the corresponding C^2/Z_3 orbifold models, and find that all of these gauge backgrounds can be related to configurations of vacuum expectation values (VEV's) of twisted and sometimes untwisted states. Gauge groups and spectra are identical from both the orbifold and the smooth bundle perspectives.
description: 1+32 pages LaTeX, references added, typos corrected
First order structural phase transition in CaFe$_2$As$_2$
Creators: name: Ni, N.
name: Nandi, S.
name: Kreyssig, A.
name: Goldman, A. I.
name: Mun, E. D.
name: Bud'ko, S. L.
name: Canfield, P. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: CaFe$_2$As$_2$ has been synthesized and found to form in the tetragonal, ThCr$_2$Si$_2$ structure with lattice parameters $a = 3.912(68) Å$ and $c = 11.667(45) Å$. Upon cooling through 170 K, CaFe$_2$As$_2$ undergoes a first order, structural phase transition to a low temperature, orthorhombic phase with a $2 - 3$ K range of hysteresis and coexistence. This transition is clearly evident in microscopic, thermodynamic and transport measurements. CaFe$_2$As$_2$ is the third member of the AFe$_2$As$_2$ (A = Ba, Sr, Ca) family to exhibit such a dramatic phase transition and is a promising candidate for studies of doping induced superconductivity.
Spectrum of closed k-strings in D=2+1
Creators: name: Athenodorou, Andreas
name: Bringoltz, Barak
name: Teper, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the excitation spectrumof closed k-strings in 2+1 dimensional SU(N) gauge theories for N = 4, 5 and k = 2. Our results demonstrate that the low-lying spectrum of the k = 2 string falls into sectors that belong to nearly pure antisymmetric and symmetric representations, showing that k-strings know not only about the centre of the group, but also about the full group. We also observe that the lightest states in each irreducible representation are consistent with what one would expect from an effective string theory that belongs to the same bosonic universality class (Nambu-Goto) as the fundamental string. We find that the corrections compared to the free string theory are of O(1), in striking contrast to the very small correction observed for the fundamental string. We also observe unbound w = 2 states.
description: 7 pages, 3 figures, talk presented at The XXVI International Symposium on Lattice Field Theory, July 14 - 19, 2008, Williamsburg, Virginia, USA
Flipped $g_μ-2$
Creators: name: Ellis, John
name: Evans, Jason L.
name: Nagata, Natsumi
name: Nanopoulos, Dimitri V.
name: Olive, Keith A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the possible magnitude of the supersymmetric contribution to $g_μ- 2$ in a flipped SU(5) GUT model. Unlike other GUT models which are severely constrained by universality relations, in flipped SU(5) the U(1) gaugino mass and the soft supersymmetry-breaking masses of right-handed sleptons are unrelated to the other gaugino, slepton and squark masses. Consequently, the lightest neutralino and the right-handed smuon may be light enough to mitigate the discrepancy between the experimental measurement of $g_μ- 2$ and the Standard Model calculation, in which case they may be detectable at the LHC and/or a 250 GeV $e^+ e^-$ collider, whereas the other gauginos and sfermions are heavy enough to escape detection at the LHC.
description: 17 pages, 5 figures
Heat-flow monotonicity related to the Hausdorff--Young inequality
Creators: name: Bennett, Jonathan
name: Bez, Neal
name: Carbery, Anthony
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A38

description: It is known that if $q$ is an even integer then the $L^q(\mathbb{R}^d)$ norm of the Fourier transform of a superposition of translates of a fixed gaussian is monotone increasing as their centres "simultaneously slide" to the origin. We provide explicit examples to show that this monotonicity property fails dramatically if $q > 2$ is not an even integer. These results are equivalent, upon rescaling, to similar statements involving solutions to heat equations. Such considerations are natural given the celebrated theorem of Beckner concerning the gaussian extremisability of the Hausdorff--Young inequality.
description: 10 pages
Methods for Mitigating Uncertainty in Real-Time Operations of a Connected Microgrid
Creators: name: Panda, Subrat Prasad
name: Genest, Blaise
name: Easwaran, Arvind
name: Rigo-Mariani, Rémy
name: Lin, PengFeng
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we compare the effectiveness of a two-stage control strategy for the energy management system (EMS) of a grid-connected microgrid under uncertain solar irradiance and load demand using a real-world dataset from an island in Southeast Asia (SEA). The first stage computes a day-ahead commitment for power profile exchanged with the main grid, while the second stage focuses on real-time controls to minimize the system operating cost. Given the challenges in accurately forecasting solar irradiance for a long time horizon, scenario-based stochastic programming (SP) is considered for the first stage. For the second stage, as the most recent weather conditions can be used, several methodologies to handle the uncertainties are investigated, including: (1) the rule-based method historically deployed on EMS, (2) model predictive controller (MPC) using either an explicit forecast or scenario-based stochastic forecast, and (3) Deep Reinforcement Learning (DRL) computing its own implicit forecast through a distribution of costs. Performances of these methodologies are compared in terms of precision with a reference control assuming perfect forecast -- i.e. representing the minimal achievable operation cost in theory. Obtained results show that MPC with a stochastic forecast outperforms MPC with a simple deterministic prediction. This suggests that using an explicit forecast, even within a short time window, is challenging. Using weather conditions can, however, be more efficient, as demonstrated by DRL (with implicit forecast), outperforming MPC with stochastic forecast by 1.3\%.
description: Published in Sustainable Energy, Grids and Networks 2024
The First Detection of CH$_2$CN in a Protoplanetary Disk
Creators: name: Canta, Alessandra
name: Teague, Richard
name: Gal, Romane Le
name: Öberg, Karin I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the first detection of the molecule cyanomethyl, CH$_2$CN, in a protoplanetary disk. Until now, CH$_2$CN had only been observed at earlier evolutionary stages, in the giant molecular clouds TMC-1 and Sgr 2, and the prestellar core L1544. We detect six transitions of ortho-CH$_2$CN towards the disk around nearby T Tauri star TW Hya. An excitation analysis reveals that the disk-averaged column density, $N$, for ortho-CH$_2$CN is $(6.3\pm 0.5)\times10^{12}$ cm$^{-2}$, which is rescaled to reflect a 3:1 ortho-para ratio, resulting in a total column density, $N_{\rm tot}$, of $(8.4\pm 0.7)\times10^{12}$ cm$^{-2}$. We calculate a disk-average rotational temperature, $T_{\rm{rot}}$ = $40 \pm 5$ K, while a radially resolved analysis shows that $T_{\rm{rot}}$ remains relatively constant across the radius of the disk. This high rotation temperature suggests that in a static disk and if vertical mixing can be neglected,CH$_2$CN is largely formed through gas-phase reactions in the upper layers of the disk, rather than solid-state reactions on the surface of grains in the disk midplane. The integrated intensity radial profiles show a ring structure consistent with molecules such as CN and DCN. We note that this is also consistent with previous lower-resolution observations of centrally peaked CH$_3$CN emission towards the TW Hya disks, since the observed emission gap disappears when convolving our observations with a larger beam size. We obtain a CH$_2$CN/CH$_3$CN ratio ranging between 4 and 10. This high CH$_2$CN/CH$_3$CN is reproduced in a representative chemical model of the TW Hya disk that employs standard static disk chemistry model assumptions, i.e. without any additional tuning.
description: 11 pages, 5 figures