cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Essays in finance: Generative probabilistic models, firm efficiency, and investor relations
Creators: name: Krause, Miguel
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: Generative models
subject: Deep learning
subject: COVID-19
subject: Investors
subject: Efficiency
subject: Investor relations
subject: 330
subject: Deep learning
subject: COVID-19
subject: Investition
subject: Leistungsfähigkeit

description: This dissertation consists of four independently written essays dealing with inference and prediction of financial data sets. The first part of this dissertation focuses on the inference element and contains two chapters that explore the question of how financial markets priced companies’ stocks during the market collapse caused by the COVID-19 pandemic in the beginning of 2020. As the COVID-19 pandemic and the subsequent economic lockdown represented one of the most impacting exogenous shocks to financial markets in recent history, it led to a huge increase in uncertainty about a firm’s future cash flows. This environment thus allowed us to examine the drivers and characteristics that may make firms more resilient to crises and help to reduce investor uncertainty. The last two essays of this dissertation move away from the inference element and deal with the prediction of financial time series data using unsupervised machine learning methods. In the finance literature so far, machine learning models are mainly used for discriminative tasks, such as point forecasts or classifications. However, in this dissertation, we show how the finance literature can be extended by using generative probabilistic models, which aim to learn the underlying distribution of the data and are able to generate realistic artificial samples. Since time series in the real world are highly stochastic, probabilistic sampling has the advantage of providing a complete distribution of possible scenarios instead of a single prediction.
Generalized Stokes laws for active colloids and their applications
Creators: name: Singh, Rajesh
name: Adhikari, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The force per unit area on the surface of a colloidal particle is a fundamental dynamical quantity in the mechanics and statistical mechanics of colloidal suspensions. Here we compute it in the limit of slow viscous flow for a suspension of $N$ spherical active colloids in which activity is represented by surface slip. Our result is best expressed as a set of linear relations, the "generalized Stokes laws", between the coefficients of a tensorial spherical harmonic expansion of the force per unit area and the surface slip. The generalized friction tensors in these laws are many-body functions of the colloidal configuration and can be obtained to any desired accuracy by solving a system of linear equations. Quantities derived from the force per unit area - forces, torques and stresslets on the colloids and flow, pressure and entropy production in the fluid - have succinct expressions in terms of the generalized Stokes laws. Most notably, the active forces and torques have a dissipative, long-ranged, many-body character that can cause phase separation, crystallization, synchronization and a variety of other effects observed in active suspensions. We use the results above to derive the Langevin and Smoluchowski equations for Brownian active suspensions, to compute active contributions to the suspension stress and fluid pressure, and to relate the synchrony in a lattice of harmonically trapped active colloids to entropy production. Our results provide the basis for a microscopic theory of active Brownian suspensions that consistently accounts for momentum conservation in the bulk fluid and at fluid-solid boundaries
description: add published version; supplemental movies at https://www.youtube.com/playlist?list=PLOKQ_pz8e2Vu0Pr0Fn2IpD2iIF1oj5G1n
Trans fatty acid intake and its association with adenomas and cancers of the colon and rectum
Creators: name: Vinikoor, Lisa Carolyn
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: Recently, there has been increasing concern about the health effects of trans fatty acid consumption, however, little is known about its role in digestive tract neoplasia. The goal of this dissertation was to investigate this relationship. The association between trans fatty acid consumption and colorectal adenomas (present throughout the entire colon and rectum) was investigated using the Diet and Health Study IV, a cross-sectional study conducted between 2001 and 2002. The highest quartile of consumption was associated with an increased prevalence of colorectal adenomas, with an adjusted prevalence odds ratio comparing the highest to the lowest quartile of consumption of 1.86 (95%CI 1.04, 3.33). The North Carolina Colon Cancer Study I, a case-control study taking place between 1996 and 2000, was utilized to examine the association for colon cancer (located between the cecum and sigmoid colon). No association was seen between trans fatty acid consumption and colon cancer among Whites or African Americans. Those in the highest quartile of consumption had an adjusted odds ratio of 1.01 (95%CI 0.69, 1.49) for Whites and 0.99 (95%CI 0.61, 1.62) for African Americans when compared to participants in the lowest quartile. The North Carolina Colon Cancer Study II was similar to the above study except cases of distal colorectal cancer (present in the sigmoid colon, rectosigmoid, and rectum) were recruited from 2001-2006. An association was seen between trans fatty acid consumption and distal colorectal cancer in Whites, giving an adjusted odds ratio of 1.34 (95%CI 0.99, 1.83) for the comparison of the highest quartile of consumption to the lowest. For African Americans this adjusted odds ratio was 0.54 (95%CI 0.28, 1.02). In sum, the research presented in this dissertation demonstrated that high trans fatty acid consumption was positively associated with colorectal adenomas and cancers of the sigmoid colon, rectosigmoid, and rectum (in Whites). No association was present between consumption and cancers of the colon (cecum through sigmoid colon). Although further research needs to be done investigating the relationship for distal colorectal cancer in African Americans, as trans fatty acid consumption declines in the United States, rates of colorectal cancer may fall as well.
Decomposition spaces, incidence algebras and Möbius inversion II: completeness, length filtration, and finiteness
Creators: name: Gálvez-Carrillo, Imma
name: Kock, Joachim
name: Tonks, Andrew
Publisher: name: arXiv
Year: 2015
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 18G30, 16T10, 06A11, 05A19, 18-XX, 55Pxx

description: This is the second in a trilogy of papers introducing and studying the notion of decomposition space as a general framework for incidence algebras and Möbius inversion, with coefficients in $\infty$-groupoids. A decomposition space is a simplicial $\infty$-groupoid satisfying an exactness condition weaker than the Segal condition. Just as the Segal condition expresses composition, the new condition expresses decomposition. In this paper, we introduce various technical conditions on decomposition spaces. The first is a completeness condition (weaker than Rezk completeness), needed to control simplicial nondegeneracy. For complete decomposition spaces we establish a general Möbius inversion principle, expressed as an explicit equivalence of $\infty$-groupoids. Next we analyse two finiteness conditions on decomposition spaces. The first, that of locally finite length, guarantees the existence of the important length filtration on the associated incidence coalgebra. We show that a decomposition space of locally finite length is actually the left Kan extension of a semi-simplicial space. The second finiteness condition, local finiteness, ensures we can take homotopy cardinality to pass from the level of $\infty$-groupoids to the level of vector spaces. These three conditions - completeness, locally finite length, and local finiteness - together define our notion of Möbius decomposition space, which extends Leroux's notion of Möbius category (in turn a common generalisation of the locally finite posets of Rota et al. and of the finite decomposition monoids of Cartier-Foata), but which also covers many coalgebra constructions which do not arise from Möbius categories, such as the Faà di Bruno and Connes-Kreimer bialgebras. Note: The notion of decomposition space was arrived at independently by Dyckerhoff and Kapranov (arXiv:1212.3563) who call them unital 2-Segal spaces.
description: 42 pages. v4: This version corrects a mistake in the published version (Adv. Math. 2018). The changes are in 7.12-7.17 and concern the formula for the section coefficients. (This paper is one of six papers that formerly constituted the long manuscript arXiv:1404.3202.)
Influence of time-delayed feedback on the dynamics of temporal localized structures in passively mode-locked semiconductor lasers
Creators: name: Seidel, Thomas G.
name: Javaloyes, Julien
name: Gurevich, Svetlana V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper, we analyze the effect of optical feedback on the dynamics of a passively mode-locked ring laser operating in the regime of temporal localized structures. This laser system is modeled by a system of delay differential equations, which include delay terms associated with the laser cavity and the feedback loop. Using a combination of direct numerical simulations and path-continuation techniques, we show that the feedback loop creates echos of the main pulse whose position and size strongly depend on the feedback parameters. We demonstrate that in the long-cavity regime, these echos can successively replace the main pulses, which defines their lifetime. This pulse instability mechanism originates from a global bifurcation of the saddle-node infinite-period type. In addition, we show that, under the influence of noise, the stable pulses exhibit forms of behavior characteristic of excitable systems. Furthermore, for the harmonic solutions consisting of multiple equispaced pulses per round-trip we show that if the location of the pulses coincide with the echo of another, the range of stability of these solutions is increased. Finally, it is shown that around these resonances, branches of different solutions are connected by period doubling bifurcations.
description: 9 pages, 11 figures, published in "Chaos: An Interdisciplinary Journal of Nonlinear Science"
Epidemiology of Q fever among dairy cattle and dairy farmers, Chiang Mai, Thailand 2015
Creators: name: Doung-ngern, Pawinee
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Q fever is a zoonosis, caused by the gram negative bacteria Coxiella burnetii. Knowledge of the epidemiology of Q fever in Thailand is limited. This study was conducted to determine the burden and the risk factors of C.burnetii infection in dairy cattle farms and farmers in Chiang Mai, Thailand. A prospective cohort study was conducted in five dairy cooperatives where evidence of C.burnetii was reported. The project included three components 1) a cohort study among farmers, 2) bulk tank milk (BTM) screening, and 3) farm investigation and specimen collection from cows and their environments in milk positive farms. Samples and data collection were obtained at baseline, 6, and 12 month intervals. Human sera were tested using Indirect Immunofluorescense Assay; cow sera and BTM were tested using Enzyme Linked Immunosorbent Assay; and vaginal swab and environmental samples were tested using Polymerase Chain Reaction. Baseline data were analyzed using logistic regression and Generalized Estimating Equation models to estimate the odds ratio (OR) and 95% confidence interval (CI). Among 306 randomly selected farms, 282 farms (92.2%) and 532 from 637 randomly selected farmers (83.5%) participated. The prevalence of C.burnetii antibodies in BTM was 40.8% (115/282) and the C.burnetii seroprevalence among farmers was 16.9% (90/532). Investigation in BTM positive farms showed C.burnetii seroprevalence was 28.4% (224/790) at the individual cow level and 91.9% (91/99) at the farm level. Multivariate analysis showed that having more than 80% of cows ≥ 2 years of age (OR 2.34, 95%CI 1.09 - 5.06) and having an infected farms within 1 km (OR 2.88, 95%CI 1.17 – 7.06) were positively associated with the odds of C.burnetii antibodies in BTM. Cleaning the birthing area (OR 0.27, 95%CI 0.08 - 0.86) and quarantining newly purchased animals (OR 0.54, 95%CI 0.30 - 0.97) provided protection. Working in a milk positive farm and exposure to birth products during calving were associated with seropositivity among farmers. This study provides useful information for Q fever prevention and control. Health education regarding Q fever prevention should be provided to farmers and public health and animal health officers in high risk areas in Thailand.
Access to Endodontic Care in North Carolina Public Health and Medicaid Settings
Creators: name: Richardson, Steven L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: The purpose of this study was to investigate issues related to access to endodontic care in North Carolina for individuals who use dental public health resources such as public health clinics (PHC) or government sponsored reimbursement programs (Medicaid and NC Health Choice) in private dental practices (PPM). 1195 dentists were surveyed regarding frequency and type of endodontic conditions encountered, treatments provided, treatment techniques, referral patterns and perceived barriers to care. 79% report frequently encountering an endodontic condition but only 34% report performing any type of definitive endodontic procedure. Lack of insurance was the greatest barrier to care with 89% considering it a moderate to major barrier, followed by cost of the endodontic treatment (87%) and cost of the restoration following treatment (86%). PPMs were more likely to consider cost and insurance a major barrier (p<.05). Treatment patterns and perceptions of barriers to care are different for PHCs and PPMs.
The Equatorial Ekman Layer
Creators: name: Marcotte, Florence
name: Dormy, Emmanuel
name: Soward, Andrew
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The steady incompressible viscous flow in the wide gap between spheres rotating about a common axis at slightly different rates (small Ekman number E) has a long and celebrated history. The problem is relevant to the dynamics of geophysical and planetary core flows, for which, in the case of electrically conducting fluids, the possible operation of a dynamo is of considerable interest. A comprehensive asymptotic study, in the limit E<<1, was undertaken by Stewartson (J. Fluid Mech. 1966, vol. 26, pp. 131-144). The mainstream flow, exterior to the E^{1/2} Ekman layers on the inner/outer boundaries and the shear layer on the inner sphere tangent cylinder C, is geostrophic. Stewartson identified a complicated nested layer structure on C, which comprises relatively thick quasi-geostrophic E^{2/7} (inside C) and E^{1/4} (outside C) layers. They embed a thinner E^{1/3} ageostrophic shear layer (on C), which merges with the inner sphere Ekman layer to form the E^{2/5} Equatorial Ekman layer of axial length E^{1/5}. Under appropriate scaling, this $E^{2/5}$--layer problem may be formulated, correct to leading order, independent of E. Accordingly, the Ekman boundary layer and ageostrophic shear layer become features of the far-field (as identified by the large value of the scaled axial co-ordinate z) solution. We present a numerical solution, which uses a non-local integral boundary condition at finite $z$ to account for the far-field behaviour. Adopting z^{-1} as a small parameter we extend Stewartson's similarity solution for the ageostrophic shear layer to higher orders. This far-field solution agrees well with that obtained from our numerical model.
description: 36 pages, 9 figures
Microprocessor Optimizations for the Internet of Things: A Survey
Creators: name: Adegbija, Tosiron
name: Rogacs, Anita
name: Patel, Chandrakant
name: Gordon-Ross, Ann
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: The Internet of Things (IoT) refers to a pervasive presence of interconnected and uniquely identifiable physical devices. These devices' goal is to gather data and drive actions in order to improve productivity, and ultimately reduce or eliminate reliance on human intervention for data acquisition, interpretation, and use. The proliferation of these connected low-power devices will result in a data explosion that will significantly increase data transmission costs with respect to energy consumption and latency. Edge computing reduces these costs by performing computations at the edge nodes, prior to data transmission, to interpret and/or utilize the data. While much research has focused on the IoT's connected nature and communication challenges, the challenges of IoT embedded computing with respect to device microprocessors has received much less attention. This paper explores IoT applications' execution characteristics from a microarchitectural perspective and the microarchitectural characteristics that will enable efficient and effective edge computing. To tractably represent a wide variety of next-generation IoT applications, we present a broad IoT application classification methodology based on application functions, to enable quicker workload characterizations for IoT microprocessors. We then survey and discuss potential microarchitectural optimizations and computing paradigms that will enable the design of right-provisioned microprocessors that are efficient, configurable, extensible, and scalable. This paper provides a foundation for the analysis and design of a diverse set of microprocessor architectures for next-generation IoT devices.
description: Published at IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (TCAD); Special Issue on Circuit and System Design for Internet of Things
The relationship between health insurance characteristics and the use of behavioral health treatment services
Creators: name: Dunlap, Laura J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: Rationale: Many people delay health care treatment and some never seek care from the formal health care system. It is estimated that 28 percent of the U.S. adult population in any year has a diagnosable mental or addictive disorder, and yet less than one-third of these individuals seek treatment. Objective: The objective of this study is to estimate the effect of health insurance characteristics on mental health and substance use (MH/SA) treatment utilization for privately-insured employees and their dependents. Methodology: Using a two-part model, I estimate the effect of MH/SA health insurance characteristics on the decision to use MH/SA services and, conditional on use, the number of treatment days. Probability of use is modeled using a random-effects logit model and the number of treatment days is modeled using a random-effects negative binomial model. Data used are private insurance enrollment and claims data for 1997-1998 from MEDSTAT's Marketscan® database. Results: Individuals are found to respond to expected out-of-pocket expenses for outpatient MH care, but this response is very small. Furthermore, MH/SA health characteristics appear to have little or no effect on SA treatment utilization for spouses and other dependents. My models show that the effect of MH/SA health insurance varies for individuals by their relationship to the policy (i.e., primary beneficiary versus spouse or other dependent). Primary beneficiaries are found to be more responsive to these characteristics iv than spouses and other dependents. When significant, the requirement of precertification by an employee assistance program (EAP) has a negative effect on MH/SA utilization. Conclusions: My findings suggest that the response to cost-sharing for MH care demand is similar to general medical care and brings into question previous arguments against parity for MH/SA treatment. Finally, the role of an EAP is not straightforward. Rather than facilitating treatment access, EAP precertification may create an obstacle to treatment and discourage utilization. However, it is also possible that EAP precertification may decrease formal utilization by providing some brief MH/SA services to individuals with milder conditions.
Concentration of information content for convex measures
Creators: name: Fradelizi, Matthieu
name: Li, Jiange
name: Madiman, Mokshay
Publisher: name: arXiv
Year: 2015
Subjects: subject: Probability (math.PR)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We establish sharp exponential deviation estimates of the information content as well as a sharp bound on the varentropy for the class of convex measures on Euclidean spaces. This generalizes a similar development for log-concave measures in the recent work of Fradelizi, Madiman and Wang (2016). In particular, our results imply that convex measures in high dimensions are concentrated in an annulus between two convex sets (as in the log-concave case) despite their possibly having much heavier tails. Various tools and consequences are developed, including a sharp comparison result for Rényi entropies, inequalities of Kahane-Khinchine type for convex measures that extend those of Koldobsky, Pajor and Yaskin (2008) for log-concave measures, and an extension of Berwald's inequality (1947).
description: Added some references
title: Управление объектами коммерческой недвижимости
Creators: name: Асаул А.Н.
name:  Люлин П.Б.
Publisher: name: Институт проблем экономического возрождения, Санкт-Петербургский государственный архитектурно-строительный университет
Year: 2008

description: В монографии исследуется сложившаяся ситуация в сфере управления объектами недвижимости. Разработана система факторов, определяющих инвестиционную привлекательность; сформулирован механизм управления объектами коммерческой недвижимости, развивающий положения инвестиционной оценки; разработан комплексный показатель инвестиционной привлекательности объектов коммерческой недвижимости, развивающий ранее известные подходы к оценке инвестиционной привлекательности; предложен показатель оценки эффективности прироста инвестиционной привлекательности объектов коммерческой недвижимости в рамках разработанного механизма; разработаны рекомендации по внедрению предложенного механизма для собственников и управляющих объектами коммерческой недвижимости. Исследования выполнены в соответствии с программой научных исследований научной школы: «Методологические проблемы эффективности региональных инвестиционно-строительных комплексов как самоорганизующихся и саморегулирующихся систем». Книга предназначена для аспирантов, студентов, а также слушателям системы переподготовки и повышения квалификации, а также широкому кругу читателей, интересующихся современными проблемами инновационного развития страны.
description: The monograph explores the current situation in the field of real estate management. The developed system of factors determining investment attractiveness; formulated the management mechanism of commercial real estate developing principles of investment appraisal; developed an integrated index of investment attractiveness of commercial real estate, developing the previously known approaches to the evaluation of investment attractiveness; the proposed indicator effectiveness evaluation increase the investment attractiveness of commercial real estate objects within the framework mechanism; developed recommendations for implementation of the proposed mechanism for owners and facilities managers of commercial real estate. The studies were performed in accordance with the program of scientific researches of scientific school "Methodological problems of efficiency of regional investment-construction complexes as self-organizing and self-regulating systems." The book is intended for graduate students and listeners of system of retraining and advanced training, and a wide circle of readers interested in modern problems of innovative development of the country.
Intervention strategies to promote linkage to care for key population after HIV self-testing: a scoping review protocol
Creators: name: Ma, Panpan
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: HIV self-testing
subject: Key population
subject: Linkage to care

description: This scoping review protocol aims to summarize a global evidence on intervention strategies to promote linkage to care for key population after HIV self-testing.
FROM WHINING TO WINNING:  AN EMPIRICAL ANALYSIS OF  THE EFFECTS OF A CHAMPIONSHIP ON CONSUMER BEHAVIOR
Creators: name: Coleman, Cori
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: In 2016, the Chicago Cubs won the World Series, and for the first time in Cubs’ fans’ lives, they were champions.  This study sought to understand the effects of a 1st time championship without the bias of expectations from previous success on various demographic groups.
        The resulting exploratory research paper utilized the Cubs’ win as a natural experiment.  A total of 202 fans responded to an online survey placed on Cubs fan sites on social media.   Among other results, data analysis indicated that team identification was significant in affecting a fan’s propensity to BIRG and predicted nearly five percent of the variance in the propensity to BIRG.  Overall, the included factors were successfully able to predict 8% of the variance in propensity to BIRG. This study shined a light on what factors may predict BIRGing behaviors on a group of fans that have finally celebrated a long-awaited championship.
Jenseits des Verstehens, jenseits der Identität. Lacans Reales als bildungsphilosophische Herausforderung
Creators: name: Thomas, Philipp
Publisher: name: Universität Tübingen
Year: 2016
Subjects: subject: Lacan, Jacques , Psychoanalyse , Pädagogik , Schule , Erziehungsziel , Identität
subject: 100
subject: Lacans Imaginäres
subject: Lacans Symbolisches
subject: Lacans Reales
subject: Lacan: The Imaginary
subject: Psychoanalytische Pädagogik
subject: pedagogy
subject: Bildungsziele
subject: school
subject: education
subject: Unterricht
subject: Lacan: The Symbolic
subject: Lacan: The Real

description: In welchen Praktiken und in welchen Konzepten, insbesondere hinsichtlich der Ziele von Bildung, lassen sich Lacans drei Ordnungen: das Imaginäre, das Symbolische und das Reale in Schule und Bildungskontext wiederfinden? Der Text vertritt die These, dass Lacans Begriff des Realen wertvolle Impulse für die Reflexion von Bildungsprozessen und für die Bildungsphilosophie bieten kann. Dies wird an den Beispielen Begriff des Lernens, Wissensformen und Identität/Nicht-Identität untersucht.
description: The text tries to spot Lacans orders The Imaginary, The Symbolic and The Real in processes of education claiming an important impact of The Real on learning objectives and on topics of philosophy of education. This impact can be illustrated by three topics: the notion of learning, the forms of knowledge, and the notion of identity/non-identity
The Influence of Muscle Size and Quality on Stair-Climb Performance in Overweight and Obese Firefighters
Creators: name: Kleinberg, Craig
Publisher: name: University of North Carolina at Chapel Hill Graduate School
Year: 2015
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: Climbing stairs has previously been shown to be one of the most relevant firefighter tasks. Furthermore, ultrasound (US) assessments of muscle size and quality have been shown to have significant influence on lower extremity performance. The purpose of this study was to examine the influence of vastus lateralis (VL) size and quality on stair climb performance (SCP). Panoramic US images of the VL were obtained to determined cross-sectional area (CSA) and echo intensity (EI) in 49 overweight and obese firefighters. A timed and weighted SCP assessment was performed upon completion of the US assessment. Our results demonstrated that EI (r=0.377, p=0.008), but not CSA (r=-0.031 p=0.833), was related to SCP. When accounting for age and VO2peak, the EI and SCP relationship was attenuated (r=0.237, p=0.108). Additionally, EI was the only significant predictor of SCP. These findings indicate that lower extremity muscle quality, but not size, may contribute to firefighter SCP.
On the limitations of analysing worst-case dynamic energy of processing
Creators: name: Morse, Jeremy
name: Kerrison, Steve
name: Eder, Kerstin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Complexity (cs.CC)
subject: Hardware Architecture (cs.AR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: This paper examines dynamic energy consumption caused by data during software execution on deeply embedded microprocessors, which can be significant on some devices. In worst-case energy consumption analysis, energy models are used to find the most costly execution path. Taking each instruction's worst case energy produces a safe but overly pessimistic upper bound. Algorithms for safe and tight bounds would be desirable. We show that finding exact worst-case energy is NP-hard, and that tight bounds cannot be approximated with guaranteed safety. We conclude that any energy model targeting tightness must either sacrifice safety or accept overapproximation proportional to data-dependent energy.
Worst Unstable Points of a Hilbert Scheme
Creators: name: Lee, Cheolgyu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14C05 (14L24)

description: In this paper, we describe the worst unstable points of a Hilbert scheme for some special Hilbert polynomials and ambient spaces using Murai's work on Gotzmann monomial sets. We investigate the geometry of the projective schemes represented by worst unstable Hilbert points and see that in certain cases that they fail to be $K$-stable or attain maximal regularity.
description: final version
Dosimetry of Three Intraoral Imaging Collimators and Technical Performance using Two Intraoral Device/Collimator Combinations
Creators: name: Johnson, Kenneth Brandon
Publisher: name: University of North Carolina at Chapel Hill
Year: 2013

description: Using optical stimulated luminescent dosimetry, FMX effective dose (E) was calculated for 18-projection adult and 12-projection child anthropomorphic phantom examinations using circular and Rinn® (Standard) and Tru-Align™ (Test) rectangular collimators. Technical performance was assessed for rectangular devices using paired FMXs made on DXTTR phantoms by 17 senior dental hygiene students. Image errors, time/motion effort, and collimator preference were evaluated. Adult FMX E was 95μSv circular, 76μSv Test, 60μSv Standard (p=0.001). Child doses were 80μSv circular, 70μSv Test, 48μSv Standard. Child thyroid-shielding produced significant reductions in effective dose for Standard (p=0.004). A lower mean number of errors occurred with the Test compared to the Standard (p=0.048); however, major errors requiring retakes were not statistically different for the two systems. Subjects preferred the Test device which produced FMXs in less time. The Test device produced diagnostically acceptable radiographs more efficiently with fewer cone-centering errors, but at the expense of patient dose.
Wystąpienie w sesji "Kierunek UKRAINA – obowiązek, szansa, czy problem?" na dorocznej Naradzie Konsultacyjnej "Study in Poland" Perspektywy, 12.07.2023, SGH
Creators: name: Degtyarova Iryna
Publisher: name: Zenodo
Year: 2023
Subjects: Ukraina
Ukraine
szkolnictwo wyższe
umiędzynarodowienie
wsparcie Ukrainy

description: Prezentacja na dorocznej Naradzie konsultacyjnej programu „Study in Poland”, która odbyła się 12 lipca w gościnnych progach Szkoły Głównej Handlowej w Warszawie, https://perspektywy.pl/portal/index.php?option=com_content&view=article&id=8490:priorytety-i-wyzwania-narada-study-in-poland&catid=24&Itemid=119
The formation of immigration law in Italy: between policy, parties, press and public opinion in 2007
Creators: name: Suo, Desirée M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: The current center-left government of Italy, under Romano Prodi, has adopted a long-term, integrationalist approach on immigration into Italy. Most apparent in the proposed citizenship bill of August 2006 and the Amato-Ferrero immigration bill of April 2007, the Prodi government has broken ties with the philosophy of the previous center-right government, epitomized in the Bossi-Fini law. Despite these intentions, however, the situation remains volatile, with the future of these legislative measures still undetermined, alongside many other institutional and social questions. Press reports and public opinion surveys highlight the emergent social complexities, recounting racist and revengeful attacks taking place against immigrant communities and increasing sentiments of insecurity, amongst demands for more integration of immigrants. Immigration is a reality in modern Italy, yet uncertainty characterizes both the pending legislation and the community responses, as the Italian government, under Prodi, finally attempts to acknowledge Italy’s transition into a modern immigration country.
Gamra: Simple Meshes for Complex Earthquakes
Creators: name: Landry, Walter
name: Barbot, Sylvain
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The static offsets caused by earthquakes are well described by elastostatic models with a discontinuity in the displacement along the fault. A traditional approach to model this discontinuity is to align the numerical mesh with the fault and solve the equations using finite elements. However, this distorted mesh can be difficult to generate and update. We present a new numerical method, inspired by the Immersed Interface Method, for solving the elastostatic equations with embedded discontinuities. This method has been carefully designed so that it can be used on parallel machines on an adapted finite difference grid. We have implemented this method in Gamra, a new code for earth modelling. We demonstrate the correctness of the method with analytic tests, and we demonstrate its practical performance by solving a realistic earthquake model to extremely high precision.
description: 38 pages, 20 figures
牛顿三大定律再思考
Creators: name: Wang, Fei
Publisher: name: figshare
Year: 2023
Subjects: Classical physics not elsewhere classified

description: Newton's three laws are the basis of classical physics and all Conservation law. However, at the cosmic scale, these laws are not necessarily accurate. The fundamental reason is that force transmission requires time. Because of the huge time delay and absolute motion, errors increase. The research in this paper may provide some new ideas for the origin and movement of the universe.
 牛顿三大定律是经典物理的基础，也是一切守恒定律的根基，但是，在宇宙尺度下，这些规律就并不一定准确了，其根本原因在于力传递需要时间，由于巨大的时间延迟与绝对运动，导致误差增加，本文的研究也许可以给宇宙的起源与运动提供一些新的思路。
Precise tuning of the Curie temperature of (Ga,Mn)As-based magnetic semiconductors by hole compensation: Support for valence-band ferromagnetism
Creators: name: Zhou, Shengqiang
name: Li, Lin
name: Yuan, Ye
name: Rushforth, A. W.
name: Chen, Lin
name: Wang, Yutian
name: Böttger, R.
name: Heller, R.
name: Zhao, Jianhua
name: Edmonds, K. W.
name: Campion, R. P.
name: Gallagher, B. L.
name: Timm, C.
name: Helm, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: For the prototype diluted ferromagnetic semiconductor (Ga,Mn)As, there is a fundamental concern about the electronic states near the Fermi level, i.e., whether the Fermi level resides in a well-separated impurity band derived from Mn doping (impurity-band model) or in the valence band that is already merged with the Mn-derived impurity band (valence-band model). We investigate this question by carefully shifting the Fermi level by means of carrier compensation. We use helium-ion implantation, a standard industry technology, to precisely compensate the hole doping of GaAs-based diluted ferromagnetic semiconductors while keeping the Mn concentration constant. We monitor the change of Curie temperature ($T_C$) and conductivity. For a broad range of samples including (Ga,Mn)As and (Ga,Mn)(As,P) with various Mn and P concentrations, we observe a smooth decrease of $T_C$ with carrier compensation over a wide temperature range while the conduction is changed from metallic to insulating. The existence of $T_C$ below 10\,K is also confirmed in heavily compensated samples. Our experimental results are naturally explained within the valence-band picture.
description: 14 pages, 10 figures
Minimum distance of Line Orthogonal Grassmann Codes in even characteristic
Creators: name: Cardinali, Ilaria
name: Giuzzi, Luca
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 51A50, 51E22, 51A45

description: In this paper we determine the minimum distance of orthogonal line-Grassmann codes for $q$ even. The case $q$ odd was solved in "I. Cardinali, L. Giuzzi, K. Kaipa, A. Pasini, Line Polar Grassmann Codes of Orthogonal Type, J. Pure Applied Algebra." We also show that for $q$ even all minimum weight codewords are equivalent and that symplectic line-Grassmann codes are proper subcodes of codimension $2n$ of the orthogonal ones.
description: 15 pages/revised version after review
Smart Hydrogels for Advanced Drug Delivery Systems
Creators: name: Bordbar-Khiabani, Aydin
Publisher: name: figshare
Year: 2023
Subjects: Medical molecular engineering of nucleic acids and proteins
Biomaterials
Biofabrication
Biomechanical engineering
Biomedical engineering not elsewhere classified
Biomedical imaging
Biomedical instrumentation
Computational physiology
Mechanobiology
Medical devices
Neural engineering
Rehabilitation engineering
Tissue engineering

description: Since the last few decades, the development of smart hydrogels, which can respond to stimuli and adapt their responses based on external cues from their environments, has become a thriving research frontier in the biomedical engineering field. Nowadays, drug delivery systems have received great attention and smart hydrogels can be potentially used in these systems due to their high stability, physicochemical properties, and biocompatibility. Smart hydrogels can change their hydrophilicity, swelling ability, physical properties, and molecules permeability, influenced by external stimuli such as pH, temperature, electrical and magnetic fields, light, and the biomolecules’ concentration, thus resulting in the controlled release of the loaded drugs. Herein, this review encompasses the latest investigations in the field of stimuli-responsive drug-loaded hydrogels and our contribution to this matter.
A simple approach to temporal cloaking
Creators: name: Eskin, Gregory
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In recent years a remarkable progress was made in the construction of spatial cloaks using the methods of transformation optics and metamaterials. The temporal cloaking, i.e. the cloaking of an event in spacetime, was also widely studied by using transformations on spacetime domains. We propose a simple and general method for the construction of temporal cloaking using the change of time variables only.
description: 12 pages, 1 figure
Conceptualizing African-American Art: The Market, Academic Discourse, and Public Reception
Creators: name: Harris, Shawnya L.
Publisher: name: University of North Carolina at Chapel Hill
Year: 2012

description: The concept of an `African-American art market' presents a new field of scholarly inquiry. However, objects labeled and fashioned as `African-American art' allude to a broader visual culture composed of objects, buyers, sellers and critics than previously acknowledged in scholarly literature. This dissertation will provide a nuanced picture of how an `African-American art market' has been conceptualized and how this understanding reflects a complex web of tensions and relationships between objects, consumers, sellers and even scholars and critics of the work. Since the current literature on the field of African-American art provides only scant attention to the consumption of African American art and virtually nothing about its place in the art market, this study will demonstrate how art historians could critically interpret African-American art in relation to market dynamics through an investigation of art related publications, oral interviews, public display venues.
High-performance generation of the Hamiltonian and Overlap matrices in FLAPW methods
Creators: name: Di Napoli, Edoardo
name: Peise, Elmar
name: Hrywniak, Markus
name: Bientinesi, Paolo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Data Structures and Algorithms (cs.DS)
subject: Performance (cs.PF)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: One of the greatest efforts of computational scientists is to translate the mathematical model describing a class of physical phenomena into large and complex codes. Many of these codes face the difficulty of implementing the mathematical operations in the model in terms of low level optimized kernels offering both performance and portability. Legacy codes suffer from the additional curse of rigid design choices based on outdated performance metrics (e.g. minimization of memory footprint). Using a representative code from the Materials Science community, we propose a methodology to restructure the most expensive operations in terms of an optimized combination of dense linear algebra kernels. The resulting algorithm guarantees an increased performance and an extended life span of this code enabling larger scale simulations.
description: Second revised version. Corrected notation. Added acknowledgment. 30 pages, 2 figures and two tables. Submitted to a Special Issue of Computer Physics Communication
Macrocyclen mit Cycloheptatrieneinheiten
Creators: name: Neigenfink, Jan
Publisher: name: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I
Year: 1998
Subjects: subject: Cycloheptatrien
subject: Makrocyclen
subject: molekularer Schalter
subject: supramolekulare Chemie
subject: cycloheptatriene
subject: makrocycle
subject: molecular switch
subject: supramolecular chemistry
subject: 540 Chemie
subject: 30 Chemie
subject: VK 7157

description: Ziel der vorliegenden Arbeit ist die Erschließung eines neuen, synthetischen Zugangs zu linearen und makrocyclischen Systemen, die als Strukturelement eine Cycloheptatrieneinheit besitzen. Hierbei kann das Cycloheptatrien aufgrund seiner zahlreichen Transformationsmöglichkeiten als ein molekularer Schalter angesehen werden. Durch photochemische Reaktionen könnte auf diese Weise der Informationsgehalt supramolekularer Systeme verändert werden. Um eine verbesserte Photoschaltbarkeit zu gewähren, werden bisarylsubstituierte Cycloheptatriene benötigt. Verbrückte Aryltropyliumsalze werden durch Umsetzung mit Anilinderivaten in verbrückte Bisarylcycloheptatriene überführt. Die Makrocyclisierung mit verbrückten Carbonsäurechloriden führt, unter den Bedingungen des Verdünnungsprinzips, zu amidischen Ringverbindungen.
description: The object of the following thesis is the development of a new synthetic approach to linear or makrocyclic systems, which contain cycloheptatriene as a structural element. Cyclohepta-triene could be used as a molecular switch, due to the fact that there are several possible transformations. Using photochemical reactions there could be an easy change of order and involed information in supramolecular systems. Bisarylcycloheptatrienes enables the photo-active system to switch more easy. Bridged arylcycloheptatrienylium salts react with anilines to bridged bisarylcycloheptatrienes. Makrocyclisation under high dilution conditions with bridged chlorocarbonacids leads to cyclic systems containing the needed structural element.
The SRSM Indicators
Creators: name: Ryan, Mark
name: Popa, Eugen
name: Blok, Vincent
name: Declich, Andrea
name: Berliri, Maresa
name: Alfonsi, Alfonso
name: Veloudis, Simeon
name: Constanzo, Natalia
name: Iannuzzi, Martina
Publisher: name: Zenodo
Year: 2023

description: Overall there are 24 indicators.
Interlinked Cycles for Index Coding: Generalizing Cycles and Cliques
Creators: name: Thapa, Chandra
name: Ong, Lawrence
name: Johnson, Sarah J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider a graphical approach to index coding. While cycles have been shown to provide coding gain, only disjoint cycles and cliques (a specific type of overlapping cycles) have been exploited in existing literature. In this paper, we define a more general form of overlapping cycles, called the interlinked-cycle (IC) structure, that generalizes cycles and cliques. We propose a scheme, called the interlinked-cycle-cover (ICC) scheme, that leverages IC structures in digraphs to construct scalar linear index codes. We characterize a class of infinitely many digraphs where our proposed scheme is optimal over all linear and non-linear index codes. Consequently, for this class of digraphs, we indirectly prove that scalar linear index codes are optimal. Furthermore, we show that the ICC scheme can outperform all existing graph-based schemes (including partial-clique-cover and fractional-local-chromatic number schemes), and a random-coding scheme (namely, composite coding) for certain graphs.
description: The original paper and a correction to it