cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Topology and Geometry of self-adjoint and elliptic boundary conditions for Dirac and Laplace operators
Creators: name: Asorey, M.
name: Ibort, A.
name: Marmo, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The theory of self-adjoint extensions of first and second order elliptic differential operators on manifolds with boundary is studied via its most representative instances: Dirac and Laplace operators. The theory is developed by exploiting the geometrical structures attached to them and, by using an adapted Cayley transform on each case, the space $\mathcal{M}$ of such extensions is shown to have a canonical group composition law structure. The obtained results are compared with von Neumann's Theorem characterising the self-adjoint extensions of densely defined symmetric operators on Hilbert spaces. The 1D case is thoroughly investigated. The geometry of the submanifold of elliptic self-adjoint extensions $\mathcal{M}_\mathrm{ellip}$ is studied and it is shown that it is a Lagrangian submanifold of the universal Grassmannian $\mathbf{Gr}$. The topology of $\mathcal{M}_\mathrm{ellip}$ is also explored and it is shown that there is a canonical cycle whose dual is the Maslov class of the manifold. Such cycle, called the Cayley surface, plays a relevant role in the study of the phenomena of topology change. Self-adjoint extensions of Laplace operators are discussed in the path integral formalism, identifying a class of them for which both treatments leads to the same results. A theory of dissipative quantum systems is proposed based on this theory and a unitarization theorem for such class of dissipative systems is proved. The theory of self-adjoint extensions with symmetry of Dirac operators is also discussed and a reduction theorem for the self-adjoint elliptic Grasmmannian is obtained. Finally, an interpretation of spontaneous symmetry breaking is offered from the point of view of the theory of self-adjoint extensions.
description: 77 pages
A Place in Public Space: Designing an Autism-Friendly Experience for Adults in Palmer Park
Creators: name: Ada, Micaela
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Landscape architecture

description: In 2023, the CDC reported that approximately 1 in 36 children in the U.S. is diagnosed with autism spectrum disorder (ASD). Prevalence rates have nearly doubled every decade since the CDC began tracking this data in 2000. When these children come of age and enter adulthood, they face new milestones and challenges such as working, living away from the family home, and navigating the world with more autonomy. Design professions —including architecture, interior design, and landscape architecture— have progressively incorporated considerations for ASD into their spaces. Adult-specific, autism-friendly design guidelines existing today have honed in on improving workplace, home, and therapeutic environments. There is a noticeable gap in addressing landscapes made for the social and leisure aspects of life. To address this gap, this research design thesis focuses on implementing design interventions in Landover, MD’s Palmer Park Community Center outdoors space to create an autism-friendly space for adults seeking comfortable recreation opportunities.
Transmission of a Single Plasmon Interacting with Multi-Level Quantum Dots Systems Coupled to Plasmonic Waveguide
Creators: name: Kim, Nam-Chol
name: Ko, Myong-Chol
name: Choe, Chung-Il
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We theoretically investigated the transmission properties of a single plasmon interacting with two-level quantum dots (QDs) and a V-type three-level QD, coupled to plasmonic waveguide, respectively. We investigated the transmission of a single plasmon by a system including a V-type three-level QD and compared it with that by a system including only two-level QDs.
description: 7 pages, 2 figures
Spontaneous Distractor Reactivation with Age: Evidence for Bound Target-Distractor Representations in Memory
Creators: name: Amer, Tarek
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Cognitive Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: This project examines age differences in the nature of memory representations, particularly whether older, but not younger, adults store simultaneously presented target and irrelevant information as rich, bound memory representations.
Brown's dihedral moduli space and freedom of the gravity operad
Creators: name: Alm, Johan
name: Petersen, Dan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Francis Brown introduced a partial compactification $M_{0,n}^δ$ of the moduli space $M_{0,n}$. We prove that the gravity cooperad, given by the degree-shifted cohomologies of the spaces $M_{0,n}$, is cofree as a nonsymmetric anticyclic cooperad; moreover, the cogenerators are given by the cohomology groups of $M_{0,n}^δ$. This says in particular that $H^\bullet(M_{0,n}^δ)$ injects into $H^\bullet(M_{0,n})$. As part of the proof we construct an explicit diagrammatically defined basis of $H^\bullet(M_{0,n})$ which is compatible with cooperadic cocomposition, and such that a subset forms a basis of $H^\bullet(M_{0,n}^δ)$. We show that our results are equivalent to the claim that $H^k(M_{0,n}^δ)$ has a pure Hodge structure of weight $2k$ for all $k$, and we conclude our paper by giving an independent and completely different proof of this fact. The latter proof uses a new and explicit iterative construction of $M_{0,n}^δ$ from $\mathbb{A}^{n-3}$ by blow-ups and removing divisors, analogous to Kapranov's and Keel's constructions of $\overline M_{0,n}$ from $\mathbb{P}^{n-3}$ and $(\mathbb{P}^1)^{n-3}$, respectively.
description: 39 pages. v2: significant revision, to appear in the Annales Scientifiques de l'ENS
The Impact of Non-Price Factors on Grocery Store Price Image
Creators: name: McNeil, Kelly
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: The price image of grocery stores plays a huge role in where consumers choose to shop. Research relating to price image often focuses on the impact of individual prices; however, there is growing evidence that non-price factors impact the formation of consumer’s store price images. My research seeks to uncover what non-price factors are significant drivers of price image.To uncover the impact of non-price factors on price image, I conducted a survey representative of the United States’ population. The survey asked respondents about seven non-price factors, and the general pricing at certain grocery stores. After conducting Cronbach’s alpha analyses and factor analyses, I ran a linear regression to identify the statistically significant factors. The final regression revealed that product assortment, atmosphere/décor, service quality, store size, price-matching policy, untidiness, and age are all significant drivers of price image in grocery stores.
Graphical representation of marginal and underlying probabilities in quantum mechanics
Creators: name: Cheon, Taksu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Wigner's marginal probability theory is revisited, and systematically applied to n-particle correlation measurements. A set of Bell inequalities whose corollaries are Hardy contradiction and its generalisation are derived with intuitive graphical analysis.
description: 12pages LaTeX with 6 eps figures
Christian Reconstructionism and the Second Amendment
Creators: name: Roehrig, Kristen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: Christian Reconstructionist theology and the Second Amendment are connected through the Reconstructionist goal of Christian dominion. The present project explores the contours of this connection and the outcomes of it by looking at Reconstructionist history, rhetoric, and influence on and beyond the Second Amendment debate. Christian Reconstructionism rose to prominence as a movement in the 1970s led by RJ Rushdoony. Its theology centers on theonomy, regeneration, presuppositionalism, and postmillennialism, all of which seek the dominion of Christians. The rhetoric, action, and influence of three organizations and their leaders provide useful case studies in this endeavor. Joel McDurmon, who plays a prominent role at American Vision, focuses on the divine roots of the Second Amendment and its role in Christian dominion. David Barton writes about the Christian history of the United States and the Second Amendment. His organization, WallBuilders, and American Vision both produce educational content influenced by Reconstructionism. Larry Pratt, leader of Gun Owners of America, focuses on guns as a way of maintaining a Biblically-based notion of the appropriate scope of government. Herb Titus influences the US courts with amicus briefs filed by Gun Owners of America. Each of these leaders wield political influence. Whether or not conservative Christians identify themselves as Reconstructionist, they are likely influenced by that way of thinking, which views the Second Amendment as a divine right protecting other divine rights and ensuring the ability to impose Christian dominion.
Cosmological tracking solution and the Super-Higgs mechanism
Creators: name: Landim, Ricardo C. G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we argue that minimal supergravity with flat Kähler metric and a power-law superpotential can relate the Super-Higgs mechanism for the local spontaneous supersymmetry breaking and the cosmological tracking solution, leading in turn to a late-time accelerated expansion of the universe and alleviating the coincidence problem.
description: 5 pages, 1 figure, minor corrections, to appear in EPJC
Reaction times: Many ways of inadvertently obtaining a false positive
Creators: name: Morís Fernández, Luis
name: Vadillo, Miguel
Publisher: name: Open Science Framework
Year: 2022

description: Over the last decade, psychology has started to question the validity of the statistical inferences drawn from many studies, partly due to the problem of inflated false positive rates. In the present study, we explored the influence of undisclosed flexibility in data analysis on one of the most popular dependent measures in psychology, namely, reaction times (RT). RTs are somewhat special because they entail some degrees of freedom of their own, mainly due to their non-normal distribution and the presence of outliers. Moreover, these degrees of freedom are usually not considered part of the analysis itself, but data preprocessing steps that must be contingent on the recorded data. We analyzed the impact of these degrees of freedom on the false positive rate using simulations over real and simulated data. Our results show that the false positive rate is inflated when instead of having a clearly defined a priori preprocessing pipeline, the preprocessing of RTs is modified after seeing the data or after several analyses are run. When several central-tendency measures, data transformations or outlier rejection techniques are combined in different ways, the false positive rate can rise up to 17%. This figure, worrying by itself, becomes more concerning when we consider that even more degrees of freedom are awaiting down the analysis pipeline, potentially making the final false positive rate much higher. We also propose an alternative method that reduces the need of preprocessing decisions by using a statistical approach based on permutations that do not require any particular underlying distribution.
Multi-Target Tracking with Time-Varying Clutter Rate and Detection Profile: Application to Time-lapse Cell Microscopy Sequences
Creators: name: Rezatofighi, Seyed Hamid
name: Gould, Stephen
name: Vo, Ba Tuong
name: Vo, Ba-Ngu
name: Mele, Katarina
name: Hartley, Richard
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Quantitative analysis of the dynamics of tiny cellular and sub-cellular structures, known as particles, in time-lapse cell microscopy sequences requires the development of a reliable multi-target tracking method capable of tracking numerous similar targets in the presence of high levels of noise, high target density, complex motion patterns and intricate interactions. In this paper, we propose a framework for tracking these structures based on the random finite set Bayesian filtering framework. We focus on challenging biological applications where image characteristics such as noise and background intensity change during the acquisition process. Under these conditions, detection methods usually fail to detect all particles and are often followed by missed detections and many spurious measurements with unknown and time-varying rates. To deal with this, we propose a bootstrap filter composed of an estimator and a tracker. The estimator adaptively estimates the required meta parameters for the tracker such as clutter rate and the detection probability of the targets, while the tracker estimates the state of the targets. Our results show that the proposed approach can outperform state-of-the-art particle trackers on both synthetic and real data in this regime.
Recurrence, rigidity, and popular differences
Creators: name: Griesmer, John T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A45, 43A46

description: We construct a set $S$ such that every translate of $S$ is a set of recurrence and a set of rigidity for a weak mixing measure preserving system. This construction generalizes or strengthens results of Katznelson, Saeki, Forrest, and Fayad and Kanigowski. The construction provides a density analogue of Julia Wolf's results on popular differences in finite abelian groups.
description: 21 pages, comments welcome. Revision 3 fixes some typos, changes terminology to use "translate" where "shift" was used in previous versions
Origin and Stability of Exomoon Atmospheres - Implications for Habitability
Creators: name: Lammer, H.
name: Schiefer, S. -C.
name: Juvan, I.
name: Odert, P.
name: Erkaev, N. V.
name: Weber, C.
name: Kislyakova, K. G.
name: Güdel, M.
name: Kirchengast, G.
name: Hanslmeier, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study the origin and escape of catastrophically outgassed volatiles (H$_2$O, CO$_2$) from exomoons with Earth-like densities and masses of $0.1M_{\oplus}$, $0.5M_{\oplus}$ and $1M_{\oplus}$ orbiting an extra-solar gas giant inside the habitable zone of a young active solar-like star. We apply a radiation absorption and hydrodynamic upper atmosphere model to the three studied exomoon cases. We model the escape of hydrogen and dragged dissociation products O and C during the activity saturation phase of the young host star. Because the soft X-ray and EUV radiation of the young host star may be up to $\sim$100 times higher compared to today's solar value during the first 100 Myr after the system's origin, an exomoon with a mass $ < 0.25M_{\oplus}$ located in the HZ may not be able to keep an atmosphere because of its low gravity. Depending on the spectral type and XUV activity evolution of the host star, exomoons with masses between $\sim0.25-0.5M_{\oplus}$ may evolve to Mars-like habitats. More massive bodies with masses $ > 0.5M_{\oplus}$, however, may evolve to habitats that are a mixture of Mars-like and Earth-analogue habitats, so that life may originate and evolve at the exomoon's surface.
description: 27 pages, 3 figures
Pair excitations and the mean field approximation of interacting Bosons, II
Creators: name: Grillakis, M.
name: Machedon, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider a large number of Bosons with interaction potential $v_N(x)=N^{3 β}v(N^βx)$. In earlier papers we considered a set of equations for the condensate $ϕ$ and pair excitation function $k$ and proved that they provide a Fock space approximation to the exact evolution of the condensate for $β\frac{1}{2}$. In 2013, we introduced a coupled refinement of our original equations and conjectured that they provide a Fock space approximation in the range $0 \le β< 1$. In the current paper we prove that this is indeed the case for $β< \frac{2}{3}$, at least locally in time. In order to do that, we re-formulate the equations of \cite{GMM} in a way reminiscent of BBGKY and apply harmonic analysis techniques in the spirit of X. Chen and J. Holmer to prove the necessary estimates. In turn, these estimates provide bounds for the pair excitation function $k$.
Self-Disclosure and Liking Across Groups
Creators: name: Wallace, Elizabeth
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: What is it about our communication with other individuals that makes us like them and subsequently become interested in forming a relationship with them? Is it what they share with us about themselves? Or perhaps the personal information about ourselves that we share with them? This exploratory honors thesis investigates a current gap in the self-disclosure literature, looking at the link between self-disclosure and liking in and between groups. Individuals were given an opportunity to disclose either low, medium, or high intimacy information to a previously unknown target and then asked to rate their feelings about that person after the disclosures. We were interested in the differing effects of disclosing to an in-group or out-group target on ratings of liking, interest in becoming friends, and interest in obtaining contact information. We found that as disclosures became more personal, those ratings tended to increase. But group membership was not a significant moderator of these ratings. This study sets the basis for future research on the subject, by providing initial results as well as easily replicable procedures and measures for the investigation of intergroup effects of self-disclosures.
Quantum Tomography twenty years later
Creators: name: Asorey, M.
name: Ibort, A.
name: Marmo, G.
name: Ventriglia, F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A sample of some relevant developments that have taken place during the last twenty years in classical and quantum tomography are displayed. We will present a general conceptual framework that provides a simple unifying mathematical picture for all of them and, as an effective use of it, three subjects have been chosen that offer a wide panorama of the scope of classical and quantum tomography: tomography along lines and submanifolds, coherent state tomography and tomography in the abstract algebraic setting of quantum systems.
Portable Optical Fiber based Localized Surface Plasmon Resonance Sensor for in-situ Biosensing
Creators: name: Mousavi, N. S. Susan
name: Moghaddasi, Fatemeh
name: Venugopalan, Priyamvada
name: Dabirian, Ali
name: Kumar, Sunil
Publisher: name: Zenodo
Year: 2019
Subjects: Neuroplasmonics
Refractive Index Biosensor
SPR/LSPR Biosensor
Brain Engineering

description: Abstract   Introduction Surface plasmon/Localized surface plasmon resonant (SPR/LSPR) nanostructures have exceptional ability to manage and concentrate light at nanoscale level capable of offering multifunctional platforms that are able to perform real-time neuro-interfacing on a wide multi-scale spatial and temporal domains. A portable fiber-optic SPR/LSPR system not only is capable of artifact and labeling free detection of brain activities but also has an inherent advantage of being configured for invasive, non-invasive and multiplex analyses. This study aims to optimize such nanostructures by analyzing their performance through a simulation-based study that will be a platform for the fabrication of a prototype. Method FDTD method has been used to analyze a non-periodic 2-D multilayer structure of SiO2, TiO2/ITO with a monolayer of silver gold/silver/Au-Ag alloy nanoparticles nanodomes deposited randomly on it. A fiber-optic refractive index (RI)-based biosensor using LSPR technique is designed for recording brain neural activities. The refractive index (RI) change occurs in the extracellular or intracellular volume, or at the membrane level of a biological sample. A fiber-optic refractive index-based (RI-based)RI based biosensor using SPR/LSPR technique is designed for recording brain neural activities. AThe nanostructure composed of silver nanoparticles to excite localized surface plasmon polaritons (LSPP) has been considered at the fiber end face. Results and Discussion The effects of the sublayer ITO or TiO2, nanodome’s shape, and materials on the resonance condition are investigated. The performance of the sensor is optimized based on its sensitivity (shift in the resonant wavelength relative to variations in the refractive index of sensing medium)In realization of the enhancement, we investigate the conditions at which strong localized coupling occurs on the surface of the nanodomes while absorptance of the nanaostructure is maximized. Further, , and its spectral resolution. The geometry structure is optimized to obtain a linear response to change in RI of the sensing medium that varies from 1.3891 332 (representing the cerebrospinal fluid (CSF)) to 1.49 396 (representing plasma vesicles).
description: {"references": ["Gupta, B, Srivastava, S. K., Verma, R. (2015). Fiber optic sensors based on plasmonics. World scientific.", "Zhang, J., Atay, T., & Nurmikko, A. V. (2009). Optical detection of brain cell activity using plasmonic gold nanoparticles. Nano Letters, 9(2), 519-5242.", "Kim, S.A. Kim, S.J., Moon H. & Jun, S.B. (2012). In vivo optical neural recording using fiber-based surface plasmonresonance. Optics Letters. 37 (4) 614."]}
Comparing Euclidean and River Distance Metrics in the Bayesian Maximum Entropy (BME) Estimation of E. coli Concentrations in Connecticut Rivers
Creators: name: Cordes, John
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Due to budget and personnel constraints, Connecticut is unable to collect data for E. coli concentration for every site every day. The Bayesian maximum entropy (BME) framework for geostatistical estimation integrates general knowledge about the space/time random field and site-specific knowledge. We developed a method to optimize the global offset function, comparing Euclidean and river distance metrics. By shrinking the kernel, we saw that as the variance decreases for the river distance approach, the spatial range holds steady. For covariance modeling, we found that river distance could estimate concentrations at a longer spatial range than could be accounted for by the tortuosity. We found areas of high concentration in the north central portion of the state and low concentrations in the east. We calculated the number of impaired river miles and we estimate that about 34% of river reaches under study had a greater than 50% chance of being impaired.
Theoretical Analysis on Spectroscopy of Atomic Bose-Hubbard Systems
Creators: name: Inaba, Kensuke
name: Yamashita, Makoto
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We provide a numerical method to calculate comprehensively the microwave and the laser spectra of ultracold bosonic atoms in optical lattices at finite temperatures. Our formulation is built up with the sum rules, up to the second order, derived from the general principle of spectroscopy. The sum rule approach allows us to discuss the physical origins of a spectral peak shift and also a peak broadening. We find that a spectral broadening of superfluid atoms can be determined from number fluctuations of atoms, while that of normal-state atoms is mainly attributed to quantum fluctuations resulting from hopping of atoms. To calculate spectra at finite temperatures, based on the sum rule approach, we provide a two-mode approximation assuming that spectra of the superfluid and normal state atoms can be calculated separately. Our method can properly deal with multi-peak structures of spectra resulting from thermal fluctuations and also coexisting of the superfluid and the normal states. By combining the two-mode approximation with a finite temperature Gutzwiller approximation, we calculate spectra at finite temperatures by considering realistic systems, and the calculated spectra show nice agreements with those in experiments.
description: 12 pages, 4 figures
Free Recall Organization in Young People at Varying Risk for Schizophrenia
Creators: name: Foubert, Claudia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: Schizophrenia is a psychotic disorder characterized by deficits in episodic memory, which may reflect impairments in encoding and utilizing context to guide memory retrieval. Similar cognitive impairments have been observed to a milder degree in first degree relatives of people with schizophrenia and may be detected in other people at varying risk for psychosis – first degree relatives of people with schizophrenia, schizoaffective disorder, or bipolar disorder (i.e., high-risk); nonrelatives with ADHD and/or an anxiety disorder (i.e., mid-risk); and healthy nonrelatives (i.e., low-risk). Using a multi-trial free recall procedure analogous to that used by Sahakyan and Kwapil (2018), I decomposed free recall performance by examining serial position functions, first recall probability, and interresponse times in three young populations at varying risk for schizophrenia. All groups showed primacy effects, a preference for initiating retrieval with the first list item, and slowing of interresponse times throughout the recall period. The high-risk group exhibited an unexpected recency effect. No significant group differences were found across the recall measures, suggesting comparable use of context among risk groups. However, additional testing is needed to increase the sample sizes and add statistical power to the analyses for a more accurate representation of the cognitive differences between risk groups.
Efficient model-driven prototyping for edge analytics
Creators: name: Chaudhary, Hafiz Ahmad Awais
name: Guevara, Ivan
name: Singh, Amandeep
name: Schieweck, Alexander
name: John, Jobish
name: MARGARIA, TIZIANA
name: Pesch, Dirk
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 40
subject: Engineering

description: Software development cycles in the context of Internet of Things (IoT) applications require the orchestration of different technological layers, and involve complex technical challenges. The engineering team needs to become experts in these technologies and time delays are inherent due to the cross-integration process because they face steep learning curves in several technologies, which leads to cost issues, and often to a resulting product that is prone to bugs. We propose a more straightforward approach to the construction of high-quality IoT applications by adopting model-driven technologies (DIME and Pyrus), that may be used jointly or in isolation. The presented use case connects various technologies: the application interacts through the EdgeX middleware platform with several sensors and data analytics pipelines. This web-based control application collects, processes and displays key information about the state of the edge data capture and computing that enables quick strategic decision-making. In the presented case study of a Stable Storage Facility (SSF), we use DIME to design the application for IoT connectivity and the edge aspects, MongoDB for storage and Pyrus to implement no-code data analytics in Python. We have integrated nine independent technologies in two distinct Low-code development environments with the production of seven processes and pipelines, and the definition of 25 SIBs in nine distinct DSLs. The presented case study is benchmarked with the platform to showcase the role of code generation and the reusability of components across applications. We demonstrate that the approach embraces a high level of reusability and facilitates domain engineers to create IoT applications in a low-code fashion
Colorful theorems for strong convexity
Creators: name: Holmsen, Andreas F.
name: Karasev, Roman
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: We prove two colorful Carathéodory theorems for strongly convex hulls, generalizing the colorful Caratéodory theorem for ordinary convexity by Imre Bárány, the non-colorful Carathéodory theorem for strongly convex hulls by the second author, and the "very colorful theorems" by the first author and others. We also investigate if the assumption of a "generating convex set" is really needed in such results and try to give a topological criterion for one convex body to be a Minkowski summand of another.
When Whistleblowers Become Traitors: Approaching Internal Relations in the Intelligence Community from a Psychological Perspective
Creators: name: Adams, Sarah Elizabeth
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: The tension between secrecy and transparency is not a new dichotomy in either US politics or popular conversation. However, in 2013, when Edward Snowden leaked classified documents to the media about an extensive surveillance program known as PRISM, the views held by many Americans regarding security and accountability reached new extremes. This study takes an interdisciplinary approach to examining one of the most central elements of this issue — the Whistleblower’s Dilemma. Referring to a situation of internal ethical conflict in which an individual must compromise one core value to uphold another, the Whistleblower’s Dilemma has no higher stakes scenario than the United States’ Intelligence Community (IC). This quantitative and qualitative content analysis examines interviews with IC whistleblowers who reported on classified information in order to identify motivations and deterrents to their behavior. Four psychological variables were examined (valuation of fairness, loyalty, public service motivation and perceived personal cost) in order to identify potential similarities and differences between internal and external IC whistleblowers. Findings demonstrated that all whistleblowers expressed being disturbed by wrongdoing (fairness), a sense of responsibility (PSM) and values-consistent behavior (PSM). Internal whistleblowers expressed higher PPC, valuation of practical fairness and specific loyalty to the government, while external whistleblowers demonstrated higher PSM, valuation of “big picture” fairness and higher levels of loyalty in general. The results of these findings were applied to the development of internal relations strategies to increase internal reporting, decrease external reporting and contribute knowledge to current insider threat
 programs.
From Quantum Chaos and Eigenstate Thermalization to Statistical Mechanics and Thermodynamics
Creators: name: D'Alessio, Luca
name: Kafri, Yariv
name: Polkovnikov, Anatoli
name: Rigol, Marcos
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This review gives a pedagogical introduction to the eigenstate thermalization hypothesis (ETH), its basis, and its implications to statistical mechanics and thermodynamics. In the first part, ETH is introduced as a natural extension of ideas from quantum chaos and random matrix theory (RMT). To this end, we present a brief overview of classical and quantum chaos, as well as RMT and some of its most important predictions. The latter include the statistics of energy levels, eigenstate components, and matrix elements of observables. Building on these, we introduce the ETH and show that it allows one to describe thermalization in isolated chaotic systems without invoking the notion of an external bath. We examine numerical evidence of eigenstate thermalization from studies of many-body lattice systems. We also introduce the concept of a quench as a means of taking isolated systems out of equilibrium, and discuss results of numerical experiments on quantum quenches. The second part of the review explores the implications of quantum chaos and ETH to thermodynamics. Basic thermodynamic relations are derived, including the second law of thermodynamics, the fundamental thermodynamic relation, fluctuation theorems, and the Einstein and Onsager relations. In particular, it is shown that quantum chaos allows one to prove these relations for individual Hamiltonian eigenstates and thus extend them to arbitrary stationary statistical ensembles. We then show how one can use these relations to obtain nontrivial universal energy distributions in continuously driven systems. At the end of the review, we briefly discuss the relaxation dynamics and description after relaxation of integrable quantum systems, for which ETH is violated. We introduce the concept of the generalized Gibbs ensemble, and discuss its connection with ideas of prethermalization in weakly interacting systems.
description: 130 pages, 36 figures, as published
Meeting the Needs of Mothers in Prison: An Investigation of North Carolina's Policies and Procedures and the Nurse's Role
Creators: name: Robbins, Meredith C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: Women make up a larger portion of the incarcerated population in North Carolina than
ever before. Nearly two-thirds of women in prison are mothers. Unsurprisingly, the policies and
procedures that govern the care of the general prison population are often insufficient to provide
adequate care for the incarcerated mother. This paper explores the current policies and
procedures that currently govern the care of incarcerated mothers and and makes
recommendations to address deficiencies in these standards. Improvements in prenatal care,
shackling policies, and family based treatment programs could all enhance health outcomes for
incarcerated mothers. In addition, this paper identifies gaps in the data and recommends
additional reporting requirements to augment the state’s ability to measure progress.
Finally, this paper outlines the role of the registered nurse in caring for mothers while they are
incarcerated and highlights the unique health needs of this vulnerable population.
Versatile microwave-driven trapped ion spin system for quantum information processing
Creators: name: Piltz, Ch.
name: Sriarunothai, Th.
name: Ivanov, S.
name: Wölk, S.
name: Wunderlich, Ch.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using trapped atomic ions we demonstrate a tailored and versatile effective spin-system suitable for quantum simulations and universal quantum computation. By simply applying microwave pulses, selected spins can be decoupled from the remaining system and thus can serve as a quantum memory, while simultaneously, other coupled spins perform conditional quantum dynamics. Also, microwave pulses can change the sign of spin-spin couplings, as well as their effective strength, even during the course of a quantum algorithm. Taking advantage of the simultaneous long-range coupling between three spins a coherent quantum Fourier transform -- an essential building block for many quantum algorithms -- is efficiently realized. This approach, which is based on microwave-driven trapped ions and is complementary to laser-based methods, opens a new route to overcoming technical and physical challenges in the quest for a quantum simulator and a quantum computer.
description: Published version. 22 pages, 5 figures
High dispersion spectroscopy of solar-type superflare stars with Subaru/HDS
Creators: name: Notsu, Yuta
name: Honda, Satoshi
name: Maehara, Hiroyuki
name: Notsu, Shota
name: Shibayama, Takuya
name: Nogami, Daisaku
name: Shibata, Kazunari
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We carried out spectroscopic observations with Subaru/HDS of 50 solar-type superflare stars found from Kepler data. More than half (34 stars) of the target stars show no evidence of the binary system, and we confirmed atmospheric parameters of these stars are roughly in the range of solar-type stars. We then conducted the detailed analyses for these 34 stars. First, the value of the "$v\sin i$" (projected rotational velocity) measured from spectroscopic results is consistent with the rotational velocity estimated from the brightness variation. Second, there is a correlation between the amplitude of the brightness variation and the intensity of Ca II IR triplet line. All the targets expected to have large starspots because of their large amplitude of the brightness variation show high chromospheric activities compared with the Sun. These results support that the brightness variation of superflare stars is explained by the rotation of a star with large starspots.
description: 6 pages, 3 figures, to appear in the Proceedings of IAU Symposium No. 320 "Solar and Stellar Flares and Their Effects on Planets". The main results of this manuscript are based on Notsu et al. (2015a, PASJ, 67, 32) and (2015b, PASJ, 67, 33)
Coherent dynamics of singlet fission controlled by nonlocal electron-phonon coupling
Creators: name: Yao, Yao
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Based on the Frenkel-charge transfer (CT) mixing model of singlet fission (SF), we incorporate both the local and nonlocal phonon baths in the Hamiltonian and adopt the algorithm of time-dependent density matrix renormalization group to simulate the fission process in tetracene. The endergonic SF is found to be facilitated by the robust quantum coherence, which concurrently gives rise to a notable quantum beating effect. Controlled by the nonlocal electron-phonon coupling, the density of triplet yield manifests a nonlinear relationship with the singlet density. As a result, the fission rate in tetracene is explicitly obtained, which is in agreement with the experimental measurement.
description: 5 pagas, 4 figures
Characterization of a Simultaneous Dual-Species Atom Interferometer for a Quantum Test of the Weak Equivalence Principle
Creators: name: Bonnin, A.
name: Zahzam, N.
name: Bidel, Y.
name: Bresson, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present here the performance of a simultaneous dual-species matter-wave accelerometer for measuring the differential acceleration between two different atomic species ($^{87}$Rb and $^{85}$Rb). We study the expression and the extraction of the differential phase from the interferometer output. The differential accelerometer reaches a short-term sensitivity of $1.23\times10^{-7}g/\sqrt{Hz}$ limited by the detection noise and a resolution of $2\times10^{-9}g$ after 11000 s, the highest reported thus far with a dual-species atom interferometer to our knowledge. Thanks to the simultaneous measurement, such resolution levels can still be achieved even with vibration levels up to $3\times10^{-3}g$, corresponding to a common-mode vibration noise rejection ratio of 94 dB (rejection factor of 50 000). These results prove the ability of such atom sensors for realizing a quantum based test of the weak equivalence principle (WEP) at a level of $η\sim10^{-9}$ even with high vibration levels and a compact sensor.
description: 17 pages, 10 figures
Conditions of Cyber Warfare: The Russian Federation's Use of Cyber Warfare in Estonia in 2007 and in Georgia in 2008
Creators: name: Nething, Constance Julia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: In this thesis, I aim to answer this question: Under what conditions will a country use cyber warfare as a tool of war?  I argue that there are three conditions under which countries, in particular the Russian Federation, decide to use cyber warfare: when the country wants to utilize the ambiguity and surprise aspects of cyber warfare, when it does not want to commit the necessary resources for a physical war, or when it wants to attack another country on all fronts (both physical and cyber) and wage a full war.  There are two particular case studies that I use as evidence: the Russian Federation’s cyber attacks on Estonia in 2007, and on Georgia in 2008.  I argue that the Russian Federation attacked Estonia in order to utilize the ambiguous and surprise elements of cyber attacks and due to a lack of commitment of physical resources, as well as a test pilot for its real goal, which was to attack Georgia in a full cyber and physical war.
Dynamic State Estimation for Multi-Machine Power System by Unscented Kalman Filter with Enhanced Numerical Stability
Creators: name: Qi, Junjian
name: Sun, Kai
name: Wang, Jianhui
name: Liu, Hui
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper, in order to enhance the numerical stability of the unscented Kalman filter (UKF) used for power system dynamic state estimation, a new UKF with guaranteed positive semidifinite estimation error covariance (UKF-GPS) is proposed and compared with five existing approaches, including UKF-schol, UKF-$κ$, UKF-modified, UKF-$ΔQ$, and the square-root unscented Kalman filter (SR-UKF). These methods and the extended Kalman filter (EKF) are tested by performing dynamic state estimation on WSCC 3-machine 9-bus system and NPCC 48-machine 140-bus system. For WSCC system, all methods obtain good estimates. However, for NPCC system, both EKF and the classic UKF fail. It is found that UKF-schol, UKF-$κ$, and UKF-$ΔQ$ do not work well in some estimations while UKF-GPS works well in most cases. UKF-modified and SR-UKF can always work well, indicating their better scalability mainly due to the enhanced numerical stability.
description: accepted by IEEE Transactions on Smart Grid
Not That Kind of Croft: A Feminist Textual Analysis of the 2013 Tomb Raider Video Game
Creators: name: McInnes, Lydia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: Using Stuart Hall’s encoding and decoding model of communication, Eve Sedgwick and Judith Butler’s conception of queer and queer studies, and cultural, media, and feminist studies theories and methodologies, this paper analyzes the character of Lara Croft as she is presented in the 2013 Tomb Raider reboot, a Triple-A, action-adventure video game developed by Crystal Dynamics and published by Square Enix as the tenth installment in the wildly successful Tomb Raider franchise. Following Lara’s journey from castaway to cult-island survivor, Tomb Raider constructs a new and updated origin story for the famed archaeologist, one of the only playable female video game characters to withstand the test of time and remain culturally relevant. Critically analyzing the discourse surrounding Lara in all her video game iterations and, more importantly, her character and depiction in the 2013 game, will, I hope, encourage broader deconstruction of traditional gamer norms and expectations that will stop geek masculine gamers from symbolically annihilating women and other minority identities from video game discourse.
Current status of dynamical modeling of fluctuations at the QCD phase transition in heavy-ion collisions
Creators: name: Nahrgang, Marlene
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For a complete understanding of the QCD phase diagram it is important to connect first-principle thermodynamic calculations to experimental data from the RHIC Beam Energy Scan and the future experimental facilities FAIR, GSI, and NICA, Dubna. This can only be achieved by a realistic modeling of the dynamical evolution of critical fluctuations in heavy-ion collisions at the QCD phase transition. In this note I will summarize the current status of these dynamical models and highlight some of the important issues, which need to be addressed in the future.
description: Published in the proceedings of the 9th International Workshop on Critical Point and Onset of Deconfinement (CPOD 2014) C14-11-17.2
title: The critical image: ethics and the art of Vernon Ah Kee
Creators: name: Castro, Jason
Publisher: name: University of Southern Queensland
Year: 2017
Subjects: subject: 190502 Fine Arts (incl. Sculpture and Painting)
subject: 190101 Art Criticism

description: For Lithuanian philosopher, Emmanuel Levinas, the idea of totality and infinity is made possible due to the notion that the Other is irreducible to comprehension Levinas1996, p.6). The Other overflows any meaning that can be attributed and any attempt to reduce the subject to a concept is a form of ‘totalisation’. Levinas’s Other is ‘infinite’, in that the subject exceeds any concept that one can possibly designate (Levinas 1969, p.22). The Other is beyond my full understanding; I cannot comprehend the maximum extent of their complexities, subtleties, choices and freedom. I can only come ‘face to face’ with them, in dialogue. This thesis applies the concept of Levinas’s ‘face to face’ theory to the contemporary artwork of Australian Indigenous artist Vernon Ah Kee. I introduce the term ‘critical image’ to describe works of art that have criticality at their core and enter into dialogues that challenge contemporary thought. I ask, if Vernon Ah Kee’s images are ‘critical images’ what are they critical of? In response to this question, I examine the colonial context of Ah Kee’s work, including the role of anthropology in creating colonial identities for Indigenous Australians. Ah Kee’s artwork is discussed in relationship to Levinas’s key concepts of ‘responsibility’, ‘proximity’, ‘infinity’ and ‘totality’. Levinas’s theories, it is argued, are useful tools in examining Ah Kee’s work in that they provide an ethical framework for interactions with the Other, preserving their alterity, and confronting us in the way we see Other people. This thesis utilises a post colonial methodology that incorporates art criticism and philosophical questioning. This study recontextualises colonial critique within the ethical framework of Levinas’s thought, not only reconsidering the usage of Levinas but repositioning Ah Kee’s work in this new context.
renpassG!S - A Free and Open Python Tool for Simulating Energy Supply Systems
Creators: name: Kaldemeyer, Cord
name: Söthe, Martin
name: Hilpert, Simon
name: Wingenbach, Clemens
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: energy system modelling

description: renpassG!S is a Python tool for simulating energy supply systems using bottom up linear programming methodology based on the Open Energy Modelling Framework (oemof)