cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Probing new physics with multi-vacua quantum tunnelings beyond standard model through gravitational waves
Creators: name: Zhou, Zihan
name: Yan, Jun
name: Addazi, Andrea
name: Cai, Yi-Fu
name: Marciano, Antonino
name: Pasechnik, Roman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We report on a novel phenomenon of particle cosmology, which features specific cosmological phase transitions via quantum tunnelings through multiple vacua. The latter is inspired by the axiverse ideas and enables us to probe the associated new physics models through a potential observation of specific patterns in the stochastic gravitational waves background. Multiple vacua may induce the nucleation of co-existing bubbles over the phase transition epoch, hence enhancing the overall process of bubbles' nucleation. Our detailed analysis of semi-analytical and numerical solutions to the bounce equations of the path integral in three vacua case has enabled us to determine the existence of three instanton solutions. This new mechanism of cosmological phase transitions clearly predicts a possibly sizeable new source of gravitational waves, with its energy spectrum being featured with particular patterns, which could be probed by the future gravitational wave interferometers.
description: 8 pages, 2 figures, PLB accepted, Typos corrected
CRISIS MANAGEMENT BASED ON THE EFFECTIVE USE OF INTELLECTUAL PROPERTY AND INTELLECTUAL CAPITAL
Creators: name: Plikus, Iryna
Publisher: name: figshare
Year: 2021
Subjects: subject: 150201 Finance
subject: FOS: Economics and business

description: As the global financial crisis, the economy of Ukraine is characterized by rapidly increase in losses and bankruptcy. From business owners, there is a lack of understanding of the need for capitalization business use of intellectual property. But the experience of other countries shows that one of the main sources of creating sustainable business benefits are intellectual property and intellectual capital are seen as instruments of influence on enterprise performance and increase its value. The algorithm capitalization and commercialization of intellectual property company. Recommendations for the use of intellectual capital at various stages of crisis management. An anti?crisis strategy based on the effective use of intellectual capital and intellectual property in various stages of crisis management. Ukraine does not have a complete theory and techniques for development of strategy of crisis management now with regard to intellectual property and intellectual capital components, but as international practice shows that leading companies in the world use intellectual property and intellectual capital as protection business.
Circle embeddings with restrictions on Fourier coefficients
Creators: name: Li, Liulan
name: Kovalev, Leonid V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: Primary: 31A05, Secondary: 30J10, 42A16

description: This paper continues the investigation of the relation between the geometry of a circle embedding and the values of its Fourier coefficients. First, we answer a question of Kovalev and Yang concerning the support of the Fourier transform of a starlike embedding. An important special case of circle embeddings are homeomorphisms of the circle onto itself. Under a one-sided bound on the Fourier support, such homeomorphisms are rational functions related to Blaschke products. We study the structure of rational circle homeomorphisms and show that they form a connected set in the uniform topology.
THE REDISTRIBUTIVE EFFECTS OF GOVERNMENT FISCAL POLICY IN IRAN (1970-80)
Creators: name: Gordji-Bandpay, Ebrahim
Publisher: name: American University
Year: 2023

description: In the past few decades, increasing concern with distribution rather than growth prompted numerous estimates of the incidence aspects of government activities. Because of this newly realized importance, comprehensive empirical urban/rural studies of budget incidence were undertaken in this research. The extent to which the government has contributed to changes in income inequality through taxing and spending activities was analyzed. In general, the existence of a dual economy has tended to induce the gap between economic growth in urban and rural areas. A relatively sluggish rise of productivity in agriculture, greater investment in urban areas, a higher rate of population growth in rural areas, extreme concentration of wealth among an elite group of high income recipients in urban areas, capital intensive methods of industrialization, the import substitution process, deterioration of agriculture's terms of trade, and migration from rural to urban areas constituted the structural elements which widened the income gap between urban and rural areas. The major findings of this study are: (A) Pre-fiscal incidence distribution of income showed a tendency toward more inequality. Although the overall trend is similar in both areas, income distribution in urban areas was more unequal than in rural areas. (B) Taxes had negative redistributive effects, although these negative effects were higher in urban than rural areas. The existence of a weak tax system, tax exemptions for big corporations, tax evasion and corruption of the tax collecting authorities, contributed positively to income disparities rather than narrowing them. (C) Although government expenditures in absolute terms benefited richer more than poorer households, in relative terms these expenditures reduced inequality as the lower income households received a greater share of the benefits than their share of total income. Among all expenditures general affairs were largely responsible for the reduction in the level of inequality. In general, households in urban areas benefited relatively more from government expenditures than households in rural areas. (D) Fiscal policy was not strong enough to reduce post-fiscal urban/rural disparity, despite the fact that it had minor positive effects toward reducing inequality.
Studying the Tensile Properties and Morphology Test for the Self Cured PMMA Resin of Prosthetic Complete Denture
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91299 Materials Engineering not elsewhere classified

description: In the present search, attempts are made to develop the properties of PMMA resin that used for prosthetic complete denture base material, by addition two different typesof particles, which included: nano-hydroxyapatite (nHA) particles and micro-zirconia (ZrO2) particles that added with different volume fractions of (1, 2 and 3) % to poly methyl methacrylate (PMMA), as cold cured resin. Also woven glass fiber kind (Eglass) and woven Kevlar fiber kind (49), it were added with a fixed volume fraction of 5 % to PMMA composites. In this work the composite prosthetic dentures specimens preparation was done by using (Hand Lay-Up) method as six groups which includes: the first group consists of PMMA resin reinforced by nHA particles, the second group consists of PMMA resin reinforced by ZrO2 particles, the third group consists of (PMMA-nHA) and glass fiber layer as laminated composite , the fourth group consistsof (PMMA-ZrO2) and glass fiber layer, the fifth group consists of (PMMA-nHA) and Kevlar fiber layer and the sixth group consists of (PMMA-ZrO2) and Kevlar fiber layer.The experimental part of this work included performing tensile test. In addition, morphology test was done by (SEM). The result of this experimental research showsthat the values of tensile strength and modulus of elasticity increased with increasing the volume fraction of (nHA and ZrO2) particles for all groups specimens, and all values of elongation decreased with increasing volume fraction of (nHA and ZrO2) particles. And the composite prosthetic dentures (PMMA-ZrO2) show greater values for tensile strength and modulus of elasticity properties. While, the reinforcement by nHA particles had shown greater values for elongation for all groups’ specimens. Also the results shown the maximum values for hybrid laminated composite materials for tensile strength and modulus of elasticity properties is obtained in hybrid laminated compositematerials for sixth groups’ specimens. While the maximum value for elongation is obtained for first groups’ specimens.
Social group and level of contentment of UBC students
Creators: name: Tucker, Ashley
name: Lee, Lisa Yea Song
name: Ying, Peony Tam Hoi
name: Xu, Wai Ting
Publisher: name: The University of British Columbia
Year: 2016

description: This study investigates the relationships between the types and sizes of UBC students’ social circles and their perceptions of contentment in these circles. 94 participants completed an online survey measuring the variables of group size, type, extroversion, frequency of contact, and perceived feelings of contentment. The results show that there is a small correlation, yet not significant between content score and group type, rpb (138) = -.144, p=0.09. This correlation indicated that higher content score is correlated with unrelated campus life. There is also a small negative correlation between the level of contentment and group size that is not statistically significant, r (138)=-.02, p =0.78. In general, although some explanations could be provided for the correlations, the results are not significant. Therefore, we retain our null hypothesis, both size and type of a UBC students social circle do not correlate with their content feelings in their social group. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Letter to Michael L. Mason from Frederic Besley
Creators: name: Besley, Frederic A., 1868-1944
Publisher: name: DigitalHub. Galter Health Sciences Library & Learning Center
Year: 1942
Subjects: subject: World War I
subject: Base Hospital #12
subject: 12th General Hospital
subject: World War II
subject: General Hospital #18
subject: Plasma
subject: Hospitals, Military
subject: Medical Staff, Hospital
subject: Gas Gangrene
subject: General Surgery
subject: Mason, Michael L., 1895-1963
subject: Waukegan (Ill.)
subject: Saint Barthelemy

description: This letter, written to Michael Mason while he was training with the 12th General Hospital Unit at Fort Custer during World War II, discusses the history of Base Hospital #12 that Besley suggests be conveyed to the personnel of the 12th General Hospital Unit.
The emergence of Logarithmic-periodic oscillations in Contact process with the topological disorder
Creators: name: Bhoyar, Priyanka D.
name: Gade, Prashant M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We present a model of contact process on Domany-Kinzel cellular automata with a geometrical disorder. In the 1-D model, each site is connected to two nearest neighbors which are either on the left or the right. The system is always attracted to an absorbing state with algebraic decay of average density with a continuously varying complex exponent. The log-periodic oscillations are imposed over and above the usual power law and are clearly evident as p --> 1. This effect is purely due to an underlying topology because all sites have the same infection probability p and there is no disorder in the infection rate. An extension of this model to two and three dimensions leads to similar results. We also study a model with fixed immunization rate p0 in one and two dimensions. If p0 > ps, where ps is percolation threshold, the system always tends to an absorbing state. As infection rate p --> 1, we observe a power law decay of order parameter with complex exponent. This may be a common feature in systems where quenched disorder leads to effective fragmentation of the lattice.
Some Hermitian K-groups via geometric topology
Creators: name: Krannich, Manuel
name: Kupers, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 19G38, 57S05, 55P47

description: We compute the first two symplectic quadratic K-theory groups of the integers, or equivalently, the first two stable homology groups of the group of symplectic integral matrices preserving the standard quadratic refinement. The main novelty in our calculation lies in its method, which is based on high-dimensional manifold theory.
description: 6 pages, to appear in Proceedings of the American Mathematical Society
Industry Dynamics with Stochastic Demand
Creators: name: Bergin, James
name: Bernhardt, Dan
name: Bergin, James
name: Bernhardt, Dan
Publisher: name: Unknown
Year: 2006
Subjects: subject: Financial Economics
subject: stochastic heterogeneity
subject: aggregate shocks
subject: exit
subject: thin markets
subject: demand uncertainty

description: We study the dynamics of an industry subject to aggregate demand shocks where the productivity of a firm’s technology evolves stochastically over time. Each period, each firm, given the aggregate demand shock, the productivity of its technology, and the distribution of technology productivities in the economy, (i) chooses whether to remain in the industry or to exit to sell its resources to an entrant; and (ii) an active firm chooses how much capital and labor to employ, and hence output to produce. To characterize the intertemporal evolution of the distribution of firms, we discuss in particular how exit decisions, aggregate output, profits and distributions of firm productivities vary, (a) across different demand realization paths; (b) along a demand history path, detailing the effects of continued good or bad market conditions; and (c) for different anticipated future market conditions. Sufficient conditions are provide for worse demand realizations to lead to increased exit of low-productivity firms and then to improved distributions of firms at all future dates and states. Finally, it is shown that a downturn in demand can raise welfare due to the impact on exit decisions
Improving the Reliability of Bootstrap Tests with the Fast Double Bootstrap
Creators: name: Davidson, Russell
name: MacKinnon, James
name: Davidson, Russell
name: MacKinnon, James
Publisher: name: Unknown
Year: 2006
Subjects: Financial Economics
Research Methods/ Statistical Methods

description: We first propose two procedures for estimating the rejection probabilities of bootstrap tests in Monte Carlo experiments without actually computing a bootstrap test for each replication. These procedures are only about twice as expensive (per replication) as estimating rejection probabilities for asymptotic tests. We then propose a new procedure for computing bootstrap P values that will often be more accurate than ordinary ones. This “fast double bootstrap” is closely related to the double bootstrap, but it is far less computationally demanding. Simulation results for three different cases suggest that this procedure can be very useful in practice.
The Impact of Poor Health on Education: New Evidence Using Genetic Markers
Creators: name: Ding, Weili
name: Lehrer, Steven
name: Rosenquist, J. Niles
name: Ding, Weili
name: Lehrer, Steven
name: Rosenquist, J. Niles
Publisher: name: Unknown
Year: 2006
Subjects: Financial Economics
Health Economics and Policy

description: This paper examines the influence of health conditions on academic performance during adolescence. To account for the endogeneity of health outcomes and their interactions with risky behaviors we exploit natural variation within a set of genetic markers across individuals. We present strong evidence that these genetic markers serve as valid instruments with good statistical properties for ADHD, depression and obesity. They help to reveal a new dynamism from poor health to lower academic achievement with substantial heterogeneity in their impacts across genders. Our investigation further exposes the considerable challenges in identifying health impacts due to the prevalence of comorbid health conditions and endogenous health behaviors.
Singlet Deformation and Non(anti)commutative N=2 Supersymmetric U(1) Gauge Theory
Creators: name: Araki, Takeo
name: Ito, Katsushi
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study N=2 supersymmetric U(1) gauge theory in non(anti)commutative N=2 harmonic superspace with the singlet deformation, which preserves chirality. We construct a Lagrangian which is invariant under both the deformed gauge and supersymmetry transformations. We find the field redefinition such that the N=2 vector multilplet transforms canonically under the deformed symmetries.
description: 11 pages, LaTeX, v2: references and note added, shorter version
Smart Train Operation Algorithms based on Expert Knowledge and Reinforcement Learning
Creators: name: Zhou, Kaichen
name: Song, Shiji
name: Xue, Anke
name: You, Keyou
name: Wu, Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: During recent decades, the automatic train operation (ATO) system has been gradually adopted in many subway systems for its low-cost and intelligence. This paper proposes two smart train operation algorithms by integrating the expert knowledge with reinforcement learning algorithms. Compared with previous works, the proposed algorithms can realize the control of continuous action for the subway system and optimize multiple critical objectives without using an offline speed profile. Firstly, through learning historical data of experienced subway drivers, we extract the expert knowledge rules and build inference methods to guarantee the riding comfort, the punctuality, and the safety of the subway system. Then we develop two algorithms for optimizing the energy efficiency of train operation. One is the smart train operation (STO) algorithm based on deep deterministic policy gradient named (STOD) and the other is the smart train operation algorithm based on normalized advantage function (STON). Finally, we verify the performance of proposed algorithms via some numerical simulations with the real field data from the Yizhuang Line of the Beijing Subway and illustrate that the developed smart train operation algorithm are better than expert manual driving and existing ATO algorithms in terms of energy efficiency. Moreover, STOD and STON can adapt to different trip times and different resistance conditions.
اخلاق زیست محیطی یا انسان محوری: بوم نقد تطبیقی با نگاهی به سپهری و امرسن Environmental Ethics versus Anthropocentrism: Comparative Ecocriticism
Creators: name: Fomeshi, Behnam
Publisher: name: figshare
Year: 2020
Subjects: subject: 200524 Comparative Literature Studies
subject: FOS: Languages and literature
subject: 200599 Literary Studies not elsewhere classified
subject: 200523 Middle Eastern Literature
subject: 200318 Middle Eastern Languages
subject: 200506 North American Literature

description: از رویکردهای تازه در حوزۀ نقد ادبی رویکرد بوم­نقد است که به بررسی رابطۀ میان انسان و طبیعت در ادبیات می­ پردازد. هرچند تعداد قابل توجهی از آثار نظری و کاربردی در حوزۀ بوم‌نقد منتشر شده ­است، اما تاکنون توجه چندانی به پژوهش بوم­نقد تطبیقی نشده­ است. پژوهش پیش­رو تلاشی است برای گشودن باب چنین پژوهش ­هایی به زبان فارسی در فضای دانشگاهی ایران. شاعر معاصر ایران، سهراب سپهری در اشعارش بارها به عناصر طبیعت اشاره می ­کند. شاعر و فیلسوف آمریکایی، رالف والدو امرسن نیز از طبیعت به عنوان موضوع آثارش استفاده می­ کند. به دلیل اهمیّت طبیعت در آثار این دو شاعر، کاربست رویکرد بوم­ نقد دریچۀ تازه ­ای را بر اندیشۀ این دو شاعر و آثار ایشان خواهد گشود. اگرچه بهره ­مندی دو شاعر از طبیعت برای آفرینش هنری به شباهت هایی منجر شده ­است، امّا نگاه آن دو به طبیعت باهم تفاوتی نیز دارد که مهم­ترین آن تفاوت دید مدرن انسان ­محور امرسن با اخلاق زیست­ محیطی پست مدرن سپهری است. رویکرد بوم ­نقد تطبیقی می­ تواند با بررسی این نگاه­ های متفاوت، مناسب ترین نگاه را برای شرایط زیست­ محیطی امروز شناسایی کند و به خوانندگان ادبیات بشناساند.
Class Size and Student Achievement: Experimental Estimates of Who Benefits and Who Loses from Reductions
Creators: name: Ding, Weili
name: Lehrer, Steven
name: Ding, Weili
name: Lehrer, Steven
Publisher: name: Unknown
Year: 2005
Subjects: Financial Economics
Research Methods/ Statistical Methods

description: Class size proponents draw heavily on the results from Project STAR to support their initiatives. Adding to the political appeal of these initiative are reports that minority and economic disadvantaged students received the largest benefits. To explore and truly understand the heterogeneous impacts of class size on student achievement requires more flexible estimation approaches. We consider several semi and nonparametric strategies and find strong evidence that i) higher ability students gain the most from class size reductions while many low ability students do not benefit from these reductions, ii) there are no significant benefits in reducing class size from 22 to 15 students in any subject area, iii) no additional benefits from class size reductions for minority or disadvantaged students, iv) significant heterogeneity in the effectiveness of class size reductions across schools and in parental and school behavioural responses.
Possibility of charmoniumlike state $X(3915)$ as $χ_{c0}(2P)$ state
Creators: name: Duan, Ming-Xiao
name: Luo, Si-Qiang
name: Liu, Xiang
name: Matsuki, Takayuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this work, we seriously discuss whether $X(3915)$ can be treated as a $χ_{c0}(2P)$ state. Based on an unquenched quark model, we give the mass spectrum of the $χ_{cJ}(2P)$ states, where there are no free input parameters in our calculation. Our result shows that the mass gap between $χ_{c0}(2P)$ and $χ_{c2}(2P)$ can reach 13 MeV, which can reproduce the mass difference between $Z(3930)$ and $X(3915)$. Additionally, the calculated masses of $χ_{c0}(2P)$ and $χ_{c2}(2P)$ are consistent with experimental values of $X(3915)$ and $Z(3930)$, respectively. Besides, giving the mass spectrum analysis to support $X(3915)$ as $χ_{c0}(2P)$, we also calculate the width of $χ_{c0}(2P)$ with the same framework, which is also consistent with the experimental data of $X(3915)$. Thus, the possibility of charmoniumlike state $X(3915)$ as $χ_{c0}(2P)$ state is further enforced.
description: 12 pages, 9 figures and 6 tables. More discussions added. Accepted by PRD for publication
Do Peers Affect Student Achievement in China’s Secondary Schools?
Creators: name: Ding, Weili
name: Lehrer, Steven F.
name: Ding, Weili
name: Lehrer, Steven F.
Publisher: name: Unknown
Year: 2006
Subjects: Financial Economics
International Development

description: Peer effects have figured prominently in debates on school vouchers, desegregation, ability tracking and anti-poverty programs. Compelling evidence of their existence remains scarce for plaguing endogeneity issues such as selection bias and the reflection problem. This paper is among the first to firmly establish the link between peer performance and student achievement, using a unique dataset from China. We find strong evidence that peer effects exist and operate in a positive and nonlinear manner; reducing the variation of peer performance increases achievement; and our semi-parametric estimates clarify the tradeoffs facing policymakers in exploiting positive peers effects to increase future achievement.
THE REDISTRIBUTIVE EFFECTS OF GOVERNMENT FISCAL POLICY IN IRAN (1970-80)
Creators: name: Gordji-Bandpay, Ebrahim
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 38
subject: Economics

description: In the past few decades, increasing concern with distribution rather than growth prompted numerous estimates of the incidence aspects of government activities. Because of this newly realized importance, comprehensive empirical urban/rural studies of budget incidence were undertaken in this research. The extent to which the government has contributed to changes in income inequality through taxing and spending activities was analyzed. In general, the existence of a dual economy has tended to induce the gap between economic growth in urban and rural areas. A relatively sluggish rise of productivity in agriculture, greater investment in urban areas, a higher rate of population growth in rural areas, extreme concentration of wealth among an elite group of high income recipients in urban areas, capital intensive methods of industrialization, the import substitution process, deterioration of agriculture's terms of trade, and migration from rural to urban areas constituted the structural elements which widened the income gap between urban and rural areas. The major findings of this study are: (A) Pre-fiscal incidence distribution of income showed a tendency toward more inequality. Although the overall trend is similar in both areas, income distribution in urban areas was more unequal than in rural areas. (B) Taxes had negative redistributive effects, although these negative effects were higher in urban than rural areas. The existence of a weak tax system, tax exemptions for big corporations, tax evasion and corruption of the tax collecting authorities, contributed positively to income disparities rather than narrowing them. (C) Although government expenditures in absolute terms benefited richer more than poorer households, in relative terms these expenditures reduced inequality as the lower income households received a greater share of the benefits than their share of total income. Among all expenditures general affairs were largely responsible for the reduction in the level of inequality. In general, households in urban areas benefited relatively more from government expenditures than households in rural areas. (D) Fiscal policy was not strong enough to reduce post-fiscal urban/rural disparity, despite the fact that it had minor positive effects toward reducing inequality.
Non-saturating magnetoresistance in heavily disordered semiconductors
Creators: name: Parish, M. M.
name: Littlewood, P. B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The resistance of a homogeneous semiconductor increases quadratically with magnetic field at low fields and, except in very special cases, saturates at fields much larger than the inverse of the carrier mobility, a number typically of order 1 Tesla. Here, we argue that a macroscopically disordered and strongly inhomogeneous semiconductor will instead show a non-saturating magnetoresistance, with typically a quasi-linear behaviour up to very large fields, and possibly also extending down to very low fields, depending on the degree of inhomogeneity. We offer this as a possible explanation of the observed anomalously large magnetoresistance in doped silver chalcogenides. Furthermore, our model of an inhomogeneous semiconductor can be developed into magnetoresistive devices that possess a large, controllable, linear response.
description: 14 pages
Entropy bounds in two dimensions
Creators: name: Mignemi, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss entropy bounds for a class of two-dimensional gravity models. While the Bekenstein bound can be proved to hold in general for weakly gravitating matter, the analogous of the holographic bound is not universal, but depends on the specific model considered
description: 5 pages, plain TeX
ADOLESCENT SOCIALIZATION AND DIFFERENTIAL RESPONSES OF HIGH RISK ADOLESCENTS TO A SCHOOL-BASED, SUBSTANCE ABUSE PREVENTION PROGRAM (DSM-III, DRUG, GROUP COUNSELING)
Creators: name: Halprin, Robin Claire
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 5203
subject: Clinical and health psychology

description: Two hundred forty-six high risk young adolescents referred to a substance abuse prevention program completed the "A.B.U.S.E. Scale," a self-report instrument devised by the investigator to assess socialization, peer attachment, and past and anticipated future pro-social, substance abuse, environmental risk, and problem-behavior involvement. Discriminant analysis as a classification technique documented that socialization, as operationalized in the DSM-III, is a dichotomous, psychological variable with definable demographic, attitudinal, and behavioral components: that socialized and undersocialized young adolescents are distinct subgroups within a population at high risk for both problem-behavior and substance abuse involvement. Stepwise discriminant analysis (Wilks method) yielded a 10-variable, statistically significant discriminant function, with a hit rate of 76%. In a pre-test/post-test, experimental/non-equivalent control group design, a school-based prevention intervention program, involving social and refusal skill training, had an overall positive effect on young adolescents' intentions to get into serious trouble in school, intentions to use drugs in the future, and tendency to utilize peers as a support system. Undersocialized young adolescents, as well as those with an acknowledged drug history, appeared to derive the most benefit from group counseling. Stepwise discriminant analysis also accurately predicted direction or lack of change for 80% of the experimental group using 15 variables, including socialization, on the "school trouble" criterion measure, and for 89% of this group, using 14 variables, on a combined criterion measure. The control group hit rate on "school trouble" was 95%, utilizing 14 variables, including peer attachment, but not socialization: 19 variables predicted 100% of this group's combined criterion outcome. The implications of the existence of the subgroups socialized and undersocialized were discussed, as were the ramifications of being able to use the derived discriminant functions in tandem to predict the direction of change in a young adolescent's intentions vis-a-vis problem-behavior and substance abuse involvement, in the presence or absence of a counseling intervention. The potential utility of discriminant function in both research and clinical practice was also discussed and suggestions for future research were presented.
Numerically and Theoretically Studying of the Upper Composite Complete Prosthetic Denture
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: The current study focused on the manufacturing and development properties of upper prosthesis complete denture from composite materials with the basis cold cured resin of poly methyl methacrylate as new fluid resin and reinforced materials by two different types of particles (nano-hydroxyapatite (nHA), micro zirconia (ZrO2)), that added with different volume fractions of (1%, 2% and 3%), and the different types of woven fibers (Glass fiber, Kevlar fiber), it were added with a fixed volume fraction of (5%) to PMMA composites. Specimens’ consist of a six groups where prepared by using (Hand Lay-Up) method from the composites materials and hybrid laminated composites materials. This research includes theoretical and numerical studies by using finite element method to confirming the experimental results of the effect of selected volume fractions of these particles and fibers on the (total deformation distribution, equivalent elastic strain and equivalent Von Mises stress) of the composite prosthetic dentures. The theoretical part included calculations the values of theoretical safety factor and Poisson's ratio. While the numerical part based on finite element method (F.E.M), which was performed by using program (ANSYS-15) to analyze the prepared of denture composite materials and evaluate its characteristics which represent total deformation distribution, equivalent stress and equivalent elastic strain. This was performed by obtaining twenty one models for the PMMA composite dental prostheses which were treated as three dimension structure. The numerical results of the F.E.A showed coincided with some of the experimental results.
Integral generators for the cohomology ring of moduli spaces of sheaves over Poisson surfaces
Creators: name: Markman, Eyal
Publisher: name: arXiv
Year: 2004
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let M be a smooth and compact moduli space of stable coherent sheaves on a projective surface S with an effective (or trivial) anti-canonical line bundle. We find generators for the cohomology ring of M, with integral coefficients. When S is simply connected and a universal sheaf E exists over SxM, then its class [E] admits a Kunneth decomposition as a class in the tensor product of the topological K-rings K(S) and K(M). The generators are the Chern classes of the Kunneth factors of [E] in K(M). The general case is similar
description: v3: Latex, 27 pages. Final version, to appear in Advances in Math. The proof of Lemma 21 is corrected and several other minor changes have been made. v2: Latex, 26 pages. The paper was split. The new version is a rewrite of the first three sections of version 1. The omitted results, about the monodromy of Hilbert schemes of point on a K3 surface, constitute part of the new paper arXiv:math.AG/0601304. v1: Latex, 53 pages
Studying the Mechanical Properties of Denture Base Materials Fabricated from Polymer Composite Materials
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91299 Materials Engineering not elsewhere classified

description: In this research, the effect of adding two different types of reinforcing particles was investigated, which included:nano-zirconia (nano-ZrO2) particles and micro-lignin particles that were added with different volume fractions of 0.5%, 1%, 1.5% and 2% on the mechanical properties of polymer composite materials. They were prepared in this research, as a complete prosthesis and partial denture base materials was prepared, by using cold cure poly methyl methacrylate (PMMA) resin matrix. The composite specimens in this research consist of two groups according to the types of reinforced particles, were prepared by using casting methods, type (Hand Lay-Up) method. The first group consists of PMMA resin reinforced by (nano-ZrO2) particles, while the second group consists of PMMA resin reinforced by (micro-lignin) particles. The mechanical tests performed in this research includedtensile test, compression test, impact test and hardness test. The results of this study showed that the values of tensile modulus of elasticity, compressive strength and hardness properties increased with increasing the volume fraction of these particles in PMMA composite materials. While, the values of tensile strength, elongation and impact strength properties decreased. Also, the addition of (nano-ZrO2) particles showed greater effect than that of (micro-lignin) particles in some properties of PMMA composite materials for prosthesis denture base materials specimens, while they have lower effect for the other properties.
An optimal entropic uncertainty relation in a two-dimensional Hilbert space
Creators: name: Ghirardi, GianCarlo
name: Marinatto, Luca
name: Romano, Raffaele
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive an optimal entropic uncertainty relation for an arbitrary pair of observables in a two-dimensional Hilbert space. Such a result, for the simple case we are considering, definitively improves all the entropic uncertainty relations which have appeared in the literature.
description: 7 pages, Latex, 2 figures
Extending the Veneziano-Yankielowicz Effective Theory
Creators: name: Merlatti, P.
name: Sannino, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the Veneziano Yankielowicz (VY) effective theory in order to account for ordinary glueball states. We propose a new form of the superpotential including a chiral superfield for the glueball degrees of freedom. When integrating it ``out'' we obtain the VY superpotential while the N vacua of the theory naturally emerge. This fact has a counterpart in the Dijkgraaf and Vafa geometric approach. We suggest a link of the new field with the underlying degrees of freedom which allows us to integrate it ``in'' the VY theory. We finally break supersymmetry by adding a gluino mass and show that the Kahler independent part of the ``potential'' has the same form of the ordinary Yang-Mills glueball effective potential.
description: LaTeX, 20 pages
Risk Sharing through Financial Markets with Endogenous Enforcement of Trades
Creators: name: Koeppl, Thorsten
name: Koeppl, Thorsten
Publisher: name: Unknown
Year: 2004
Subjects: subject: Financial Economics
subject: Limited Commitment
subject: Enforcement Intermediaries
subject: Lindahl-equilibrium
subject: Endogenous Borrowing Constraints

description: When people share risk in financial markets, intermediaries provide costly enforcement for most trades and, hence, are an integral part of financial markets’ organization. We assess the degree of risk sharing that can be achieved through financial markets when enforcement is based on the threat of exclusion from future trading as well as on costly enforcement intermediaries. Starting from constrained efficient allocations and taking into account the public good character of enforcement we study a Lindahl-equilibrium where people invest in asset portfolios and simultaneously choose to relax their borrowing limits by paying fees to an intermediary who finances the costs of enforcement. We show that financial markets always allow for optimal risk sharing as long as markets are complete, default is prevented in equilibrium and intermediaries provide costly enforcement competitively. In equilibrium, costly enforcement translates into both agent-specific borrowing limits and price schedules that include a separate default premium. Enforcement costs - or, equivalently, default premia - increase borrowing costs, while interest rates per se depend on the change in enforcement over time.
Black hole solutions coupled to Born-Infeld electrodynamics with derivative corrections
Creators: name: Tamaki, Takashi
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate black hole solutions in the Einstein-Born-Infeld system. We clarify the role played by derivative corrections to the Born-Infeld (BI) action. The qulitative differences from the case without derivative corrections are: (i) there is no particlelike solution. (ii) the existence of the inner horizon is restricted to the near extreme solutions. (iii) contribution of the BI parameter $b$ to the gravitational mass and the Hawking temperature works in the opposite direction.
description: 5 pages, 5 figures, explanation improved
Binary operations inspired by generalized entropies applied to figurate numbers
Creators: name: Sparavigna, Amelia Carolina
Publisher: name: Zenodo
Year: 2021
Subjects: Generalized entropies
q-calculus
Abelian groups
Generalized sums
binary operations
OEIS
On-Line Encyclopedia of Integer Sequences
Figurate numbers
Triangular numbers
Pentagonal numbers
Pronic numbers
Hexagonal numbers
Entropy
Generalized Entropy
Tsallis Entropy

description: The generalized entropies, which are coming from generalizations of the standard statistical mechanics, have binary composition operations that can be applied to the study of numbers. Here we will discuss these operations, inspired by entropies, and their use to study some of the figurate numbers.
Differentiability of the Efficient Frontier when Commitment to Risk Sharing is Limited
Creators: name: Koeppl, Thorsten
name: Koeppl, Thorsten
Publisher: name: Unknown
Year: 2004
Subjects: subject: Financial Economics
subject: Risk Sharing
subject: Limited Commitment
subject: Differentiability of Efficient Frontier

description: This paper shows that the value function describing efficient risk sharing with limited commitment is not necessarily differentiable everywhere. We link differentiability of the value function to history dependence of efficient allocations and provide sufficient conditions for both properties.
ADOLESCENT SOCIALIZATION AND DIFFERENTIAL RESPONSES OF HIGH RISK ADOLESCENTS TO A SCHOOL-BASED, SUBSTANCE ABUSE PREVENTION PROGRAM (DSM-III, DRUG, GROUP COUNSELING)
Creators: name: Halprin, Robin Claire
Publisher: name: American University
Year: 2023

description: Two hundred forty-six high risk young adolescents referred to a substance abuse prevention program completed the "A.B.U.S.E. Scale," a self-report instrument devised by the investigator to assess socialization, peer attachment, and past and anticipated future pro-social, substance abuse, environmental risk, and problem-behavior involvement. Discriminant analysis as a classification technique documented that socialization, as operationalized in the DSM-III, is a dichotomous, psychological variable with definable demographic, attitudinal, and behavioral components: that socialized and undersocialized young adolescents are distinct subgroups within a population at high risk for both problem-behavior and substance abuse involvement. Stepwise discriminant analysis (Wilks method) yielded a 10-variable, statistically significant discriminant function, with a hit rate of 76%. In a pre-test/post-test, experimental/non-equivalent control group design, a school-based prevention intervention program, involving social and refusal skill training, had an overall positive effect on young adolescents' intentions to get into serious trouble in school, intentions to use drugs in the future, and tendency to utilize peers as a support system. Undersocialized young adolescents, as well as those with an acknowledged drug history, appeared to derive the most benefit from group counseling. Stepwise discriminant analysis also accurately predicted direction or lack of change for 80% of the experimental group using 15 variables, including socialization, on the "school trouble" criterion measure, and for 89% of this group, using 14 variables, on a combined criterion measure. The control group hit rate on "school trouble" was 95%, utilizing 14 variables, including peer attachment, but not socialization: 19 variables predicted 100% of this group's combined criterion outcome. The implications of the existence of the subgroups socialized and undersocialized were discussed, as were the ramifications of being able to use the derived discriminant functions in tandem to predict the direction of change in a young adolescent's intentions vis-a-vis problem-behavior and substance abuse involvement, in the presence or absence of a counseling intervention. The potential utility of discriminant function in both research and clinical practice was also discussed and suggestions for future research were presented.
Symmetry-related transport on a fractional quantum Hall edge
Creators: name: Park, Jinhong
name: Rosenow, Bernd
name: Gefen, Yuval
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Low-energy transport in quantum Hall states is carried through edge modes, and is dictated by bulk topological invariants and possibly microscopic Boltzmann kinetics at the edge. Here we show how the presence or breaking of symmetries of the edge Hamiltonian underlie transport properties, specifically d.c. conductance and noise. We demonstrate this through the analysis of hole-conjugate states of the quantum Hall effect, specifically the $ν=2/3$ case in a quantum point-contact (QPC) geometry. We identify two symmetries, a continuous $SU(3)$ and a discrete $Z_3$, whose presence or absence (different symmetry scenarios) dictate qualitatively different types of behavior of conductance and shot noise. While recent measurements are consistent with one of these symmetry scenarios, others can be realized in future experiments.
description: 14 pages, 6 figures
Numerically and Experimentally Studying of Some Mechanical Properties of the Polyester Matrix Composite Material Reinforced by Jute Fibers
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering
subject: 91202 Composite and Hybrid Materials

description: This research focuses on the preparation of polymer matrix composite material by (hand lay – up) method, where the material (rectangular beam) was prepared from unsaturated polyester resin as a matrix reinforced by natural jute fiber with different volume fraction (3%, 4%, 5%, 6%). Numerical studies by using finite element method (Ansys 11 package) to study the effect of selected volume fractions of jute fibers on the bending properties. Results of this experimental research indicate that increasing the volume fraction of jute fibers lead to increase bending modulus of elasticity. The values of flexural strength and shear stress increase with the increase of jute fibers volume fraction while the values of deflection and maximum strain decreases for both experimental and numerical studies.