cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: East African Journal of Health Sciences, Vol. 4 No. 2 (2022): East African Journal of Health Sciences
title: East African Journal of Health Sciences
titleType: AlternativeTitle
Creators: name: East African Journal Of Health Sciences
Publisher: name: East African Journal of Health Sciences
Year: 2022

description: Nearly half of mothers daughters have poor sexual and reproductive communication levels and skills in Waliso’s Oromia Region: A cross-sectional mixed study...662-672
Clustering and determinants of acute undernutrition among under-five children in urban and rural communities of Tigray in Ethiopia...673-689
Antimicrobial Resistance: The invisible and silent pandemic, a call to improve access to diagnostics and antibiotics in low-income countries....648-650
Cholera Outbreak Investigation and its Determinants in Enderta District of Tigray: A Case-Control Study...700-708
Factors associated with intention to use of family planning among women from Pastoralist communities of Ethiopia: A robust regression analysis...651-661
MAGNITUDE AND PROBABLE ETIOLOGIES OF NEONATAL SEIZURE AMONG NEONATES ADMITTED TO NEONATAL INTENSIVE CARE UNIT OF AYDER COMPREHENSIVE SPECIALIZED HOSPITAL, MEKELLE, ETHIOPIA....690-699
Anomalous spin dynamics in charge ordered, 'two-electron' doped manganite Ca_0.9Ce_0.1MnO_3 : consequence of a spin-liquid phase?
Creators: name: Sharma, Ajay
name: Sarangi, Subhasis
name: Bhat, S. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The 'two-electron' doped rare earth mangnites Ca_1-x Ce_x MnO_3 (x = 0.1,0.2) are probed using resistivity, ac susceptibility and electron paramagnetic resonance (EPR) measurements across their respective charge ordering (CO) temperatures T_CO = 173 K and 250 K. The EPR 'g' factor and intensity as well as the transport and magnetic behaviours of the two compositions are qualitatively similar and are as expected for CO systems. However, the EPR linewidth, reflective of the spin dynamics, for x = 0.1, shows a strongly anomalous temperature dependence, decreasing with decreasing temperature below T_CO in contrast with the sample with x = 0.2 and other CO systems. Keeping in view the evidence for magnetic frustration in the system, we propose that the anomalous temperature dependence of the linewidth is the signature of the occurrence of a disorder driven spin liquid phase, present along with charge ordering.
description: 19 pages including 4 figures
Are multi-quasiparticle interactions important in molecular ionization?
Creators: name: Mejuto-Zaera, Carlos
name: Weng, Guorong
name: Romanova, Mariya
name: Cotton, Stephen J.
name: Whaley, K. Birgitta
name: Tubman, Norm M.
name: Vlček, Vojtěch
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Photo-emission spectroscopy directly probes individual electronic states, ranging from single excitations to high-energy satellites, which simultaneously represent multiple quasiparticles (QPs) and encode information about electronic correlation. First-principles description of the spectra requires an efficient and accurate treatment of all many-body effects. This is especially challenging for inner valence excitations where the single QP picture breaks down. Here, we provide the full valence spectra of small closed-shell molecules, exploring the independent and interacting quasiparticle regimes, computed with the fully-correlated adaptive sampling configuration interaction (ASCI) method. We critically compare these results to calculations with the many-body perturbation theory, based on the $GW$ and vertex corrected $GWΓ$ approaches. The latter explicitly accounts for two-QP quantum interactions, which have been often neglected. We demonstrate that for molecular systems, the vertex correction universally improves the theoretical spectra, and it is crucial for accurate prediction of QPs as well as capturing the rich satellite structures of high-energy excitations. $GWΓ$ offers a unified description across all relevant energy scales. Our results suggest that the multi-QP regime corresponds to dynamical correlations, which can be described via perturbation theory.
description: 14 pages, 3 figures, plus SI
Kinetic step bunching during surface growth
Creators: name: Frisch, T.
name: Verga, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the step bunching kinetic instability in a growing crystal surface characterized by anisotropic diffusion. The instability is due to the interplay between the elastic interactions and the alternation of step parameters. This instability is predicted to occur on a vicinal semiconductor surface Si(001) or Ge(001) during epitaxial growth. The maximal growth rate of the step bunching increases like $F^{4}$, where $F$ is the deposition flux. Our results are complemented with numerical simulations which reveals a coarsening behavior on the long time for the nonlinear step dynamics.
description: 4 pages, 6 figures, submitted to PRL
Search for Gravitational Waves from Primordial Black Hole Binary Coalescences in the Galactic Halo
Creators: name: LIGO Scientific Collaboration
name: Abbott, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use data from the second science run of the LIGO gravitational-wave detectors to search for the gravitational waves from primordial black hole (PBH) binary coalescence with component masses in the range 0.2--$1.0 M_\odot$. The analysis requires a signal to be found in the data from both LIGO observatories, according to a set of coincidence criteria. No inspiral signals were found. Assuming a spherical halo with core radius 5 kpc extending to 50 kpc containing non-spinning black holes with masses in the range 0.2--$1.0 M_\odot$, we place an observational upper limit on the rate of PBH coalescence of 63 per year per Milky Way halo (MWH) with 90% confidence.
description: 7 pages, 4 figures, to be submitted to Phys. Rev. D
Two-dimensional rational solitons and their blow-up via the Moutard transformation
Creators: name: Taimanov, I. A.
name: Tsarev, S. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: By using the Moutard transformation of two-dimensional Schroedinger operators we derive a procedure for constructing explicit examples of such operators with rational fast decaying potentials and degenerate $L_2$-kernels (this construction was sketched in arXiv:0706.3595) and show that if we take some of these potentials as the Cauchy data for the Novikov-Veselov equation (a two-dimensional version of the Korteweg-de Vries equation), then the corresponding solutions blow up in a finite time
description: 22 pages, PDFLatex, 9 figures. v2: some computations corrected
Gas and dust properties in the afterglow spectra of GRB 050730
Creators: name: Starling, R. L. C.
name: Vreeswijk, P. M.
name: Ellison, S. L.
name: Rol, E.
name: Wiersema, K.
name: Levan, A. J.
name: Tanvir, N. R.
name: Wijers, R. A. M. J.
name: Tadhunter, C.
name: Zaurin, J. R.
name: Delgado, R. M. Gonzalez
name: Kouveliotou, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present early WHT ISIS optical spectroscopy of the afterglow of gamma-ray burst GRB 050730. The spectrum shows a DLA system with the highest measured hydrogen column to date: N(HI) = 22.1 +/- 0.1 at the third-highest GRB redshift z = 3.968. Our analysis of the Swift XRT X-ray observations of the early afterglow show X-ray flares accompanied by decreasing X-ray absorption. From both the optical and the X-ray spectra we constrain the dust and gas properties of the host galaxy. We find the host to be a low metallicity galaxy, with low dust content. Much of the X-ray absorbing gas is situated close to the GRB, whilst the HI absorption causing the DLA is most likely located further out.
description: 5 pages, 2 figures. Accepted for A&A Letters
Real-time Power System Simulation with Hardware Devices through DNP3 in Cyber-Physical Testbed
Creators: name: Huang, Hao
name: Davis, C. Matthew
name: Davis, Katherine R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Modern power grids are dependent on communication systems for data collection, visualization, and control. Distributed Network Protocol 3 (DNP3) is commonly used in supervisory control and data acquisition (SCADA) systems in power systems to allow control system software and hardware to communicate. To study the dependencies between communication network security, power system data collection, and industrial hardware, it is important to enable communication capabilities with real-time power system simulation. In this paper, we present the integration of new functionality of a power systems dynamic simulation package into our cyber-physical power system testbed that supports real-time power system data transfer using DNP3, demonstrated with an industrial real-time automation controller (RTAC). The usage and configuration of DNP3 with real-world equipment in to achieve power system monitoring and control of a large-scale synthetic electric grid via this DNP3 communication is presented. Then, an exemplar of DNP3 data collection and control is achieved in software and hardware using the 2000-bus Texas synthetic grid.
description: 6 pages, to be published in the 5th Texas Power and Energy Conference
On the relation between ADM and Bondi energy-momenta
Creators: name: Zhang, Xiao
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: When a spacetime takes Bondi radiating metric, and is vacuum and asymptotically flat at spatial infinity which ensures the positive mass theorem, we prove that the standard ADM energy-momentum is the past limit of the Bondi energy-momentum. We also derive a formula relating the ADM energy-momentum of any asymptotically flat spacelike hypersurface to the Bondi energy-momentum of any null hypersurface. The formula indicates that the Bondi mass is always less than the ADM total energy if the system has {\it news}. The assumed asymptotic flatness precludes gravitational radiation. We therefore study further the relation between the ADM total energy and the Bondi mass when gravitational radiation emits. We find that in this case the ADM total energy is no longer the past limit of the Bondi mass. They differ by certain quantity relating to the {\it news} of the system.
description: 21 pages, final version
Entanglement and Quantum Noise Due to a Thermal Bosonic Field
Creators: name: Solenov, Dmitry
name: Tolkunov, Denis
name: Privman, Vladimir
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze the indirect exchange interaction between two two-state systems, e.g., spins 1/2, subject to a common finite-temperature environment modeled by bosonic modes. The environmental modes, e.g., phonons or cavity photons, are also a source of quantum noise. We analyze the coherent vs noise-induced features of the two-spin dynamics and predict that for low enough temperatures the induced interaction is coherent over time scales sufficient to create entanglement. A nonperturbative approach is utilized to obtain an exact solution for the onset of the induced interaction, whereas for large times, a Markovian scheme is used. We identify the time scales for which the spins develop entanglement for various spatial separations. For large enough times, the initially created entanglement is erased by quantum noise. Estimates for the interaction and the level of quantum noise for localized impurity electron spins in Si-Ge type semiconductors are given.
description: 12 pages, 9 figures; typos corrected
Axion-Radiation Conversion by Super and Normal Conductors
Creators: name: Iwazaki, Aiichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have proposed a method for the detection of dark matter axion. It uses superconductor under strong magnetic field. As is well known, the dark matter axion induces oscillating electric field under magnetic field. The electric field is proportional to the magnetic field and makes charged particles oscillate in conductors. Then, radiations of electromagnetic fields are produced. Radiation flux depends on how large the electric field is induced and how large the number of charged particles is present in the conductors. We show that the electric field in superconductor is essentially identical to the one induced in vacuum. It is proportional to the magnetic field. It is only present in the surface because of Meissner effect. On the other hand, although the magnetic field can penetrates the normal conductor, the oscillating electric field is only present in the surface of the conductor because of the skin effect. The strength of the electric field induced in the surface is equal to the one in vacuum. We obtain the electric field in the superconductor by solving equations of electromagnetic fields coupled with axion and Cooper pair described by Ginzburg-Landau model. The electric field in the normal conductor is obtained by solving equations of electromagnetic fields in the conductor coupled with axion. We compare radiation flux from the cylindrical superconductor with that from the normal conductor with same size. We find that the radiation flux from the superconductor is a hundred times larger than the flux from the normal conductor. We also show that when we use superconducting resonant cavity, we obtain radiation energy generated in the cavity two times of the order of the magnitude larger than that in normal conducting resonant cavity.
description: section(6)rewritten, 12 pages, no figure
Variational Multiscale Nonparametric Regression: Algorithms and Implementation
Creators: name: del Alamo, Miguel
name: Li, Housen
name: Munk, Axel
name: Werner, Frank
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation (stat.CO)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 62G05, 68U10

description: Many modern statistically efficient methods come with tremendous computational challenges, often leading to large-scale optimisation problems. In this work, we examine such computational issues for recently developed estimation methods in nonparametric regression with a specific view on image denoising. We consider in particular certain variational multiscale estimators which are statistically optimal in minimax sense, yet computationally intensive. Such an estimator is computed as the minimiser of a smoothness functional (e.g., TV norm) over the class of all estimators such that none of its coefficients with respect to a given multiscale dictionary is statistically significant. The so obtained multiscale Nemirowski-Dantzig estimator (MIND) can incorporate any convex smoothness functional and combine it with a proper dictionary including wavelets, curvelets and shearlets. The computation of MIND in general requires to solve a high-dimensional constrained convex optimisation problem with a specific structure of the constraints induced by the statistical multiscale testing criterion. To solve this explicitly, we discuss three different algorithmic approaches: the Chambolle-Pock, ADMM and semismooth Newton algorithms. Algorithmic details and an explicit implementation is presented and the solutions are then compared numerically in a simulation study and on various test images. We thereby recommend the Chambolle-Pock algorithm in most cases for its fast convergence. We stress that our analysis can also be transferred to signal recovery and other denoising problems to recover more general objects whenever it is possible to borrow statistical strength from data patches of similar object structure.
description: Codes are available at https://github.com/housenli/MIND
On a Duality between Metrics and $Σ$-Proximities
Creators: name: Chebotarev, P. Yu.
name: Shamis, E. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Metric Geometry (math.MG)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 46F10; 54E40; 15A51

description: : In studies of discrete structures, functions are frequently used that express proximity, but are not metrics. We consider a class of such functions that is characterized by a normalization condition and an inequality that plays the same role as the triangle inequality does for metrics. We show that the introduced functions, named $Σ$-proximities, are in a definite sense dual to metrics: there exists a natural one-to-one correspondence between metrics and $Σ$-proximities defined on the same finite set; in contrast to metrics, $Σ$-proximities measure {\it comparative} proximity; the closer the objects, the greater the $Σ$-proximity; diagonal entries of the $Σ$-proximity matrix characterize the ``centrality'' of elements. The results are extended to arbitrary infinite sets.
description: 5 pages
Optical sum rule in metals with a strong interaction
Creators: name: Karakozov, A. E.
name: Maksimov, E. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The restricted optical sum rule and its dependence on the temperature, a superconducting gap and the cutoff energy have been investigated. As known this sum rule depends on the cutoff energy and the relaxation rate even for a homogeneous electron gas interacting with impurities or phonons. It is shown here that additional dependence of the spectral weight on a superconducting gap is very small in this model and this effect disappears totally when the relaxation rate is equal zero. The model metal with a single band is considered in details. It is well known that for this model there is the dependence of the sum rule on the temperature and the energy gap even in the case when the relaxation is absent. This dependence exists due to the smearing of the electron distribution function and it is expressed in the terms of Sommerfeld expansion. Here it is shown that these effects are considerably smaller than that of related with the relaxation rate if the band width is larger than the average phonon frequency. It is shown also that the experimental data about the temperature dependence of the spectral weight for the high- materials can be successfully explained in the framework approach based on the temperature dependence of the relaxation rate
description: 13 pages, 7 figures, the talk given on Internatinal coference on theoretical physics, april 11-16,2005, Moscow
Instantons, Symmetries and Anomalies in Five Dimensions
Creators: name: Genolini, Pietro Benetti
name: Tizzano, Luigi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: All five-dimensional non-abelian gauge theories have a $U(1)_I$ global symmetry associated with instantonic particles. We describe an obstruction to coupling $U(1)_I$ to a classical background gauge field that occurs whenever the theory has a one-form center symmetry. This is a finite-order mixed 't Hooft anomaly between the two symmetries. We also show that a similar obstruction takes place in gauge theories with fundamental matter by studying twisted bundles for the ordinary flavor symmetry. We explore some general dynamical properties of the candidate phases implied by the anomaly. Finally, we apply our results to supersymmetric gauge theories in five dimensions and analyze the symmetry enhancement patterns occurring at their conjectured RG fixed points.
description: 28 pages; v2: references and some comments added
e-ppokrates: online medical professionalism
Creators: name: Pinho-Costa, Luís
name: Hélder Sousa
Publisher: name: F1000Research
Year: 2015

description: Introduction: The use of online social media by doctors has immeasurable potential but raises concerns among patients, doctors and medical community. We aimed to characterize the online presence and conduct of family doctors in the Cluster of Health Centers of Gondomar (CHCG), Portugal.

Discussion: The online presence of the family doctors in CHCG was strong and served professional and personal purposes. The majority of doctors were users of non-institutional email providers, but it was also frequent the use of institutional e-mail, social networks and forums. Most reported they had not read guidelines on online medical professionalism, often incurring in potential misconduct. Strategies should be implemented to guide such professionals.
Problem List: quality improvement of medical records in a Portuguese family health unit
Creators: name: Azevedo, Pedro
name: Pinho-Costa, Luís
name: Azevedo, Cristiana
name: Castro, Elisabete
name: Moreira, Sónia
name: Souto, Inês
Publisher: name: F1000Research
Year: 2015

description: Introduction: Being central to the medical record, the Problem List highlights factors that can affect clinical management. However, its usefulness varies due to lack of consensus on the inclusion criteria, making it essential for teams to adopt a standardized approach that ensures data quality.

Objectives: Assess and improve the standardization of the content of the problem list of patients in Fânzeres Family Health Unit (FFHU) according to criteria established by the team.

Methodology: We retrospectively assessed the baseline proportion of criteria-abiding problems using a simple random sample of patients (May 2013). Criteria compliance was assessed by two reviewers and kappa statistic was calculated. For the next quarter year we delivered an intervention consisting of: weekly analysis of examples, individually and by the team; weekly training of the lists update on the electronic medical record software; c) daily screensaver reminding the criteria in use; d) always available PDF summarizing the criteria. In September 2014 we reassessed per the same methods used at baseline. We compared the proportions over time using the chi-square test. The quality standard (QS) was defined by team consensus: <70% insufficient, 70-79% reasonable, 80-89% good, ≥ 90% excellent.

Results: 2101 problems were analyzed at baseline (352 patients, 48 ​± 23 years; 57% women; κ inter-rater 0.83) and 2610 at reassessment (384 patients, 53 ± 24 years, 58% women; κ inter-rater 0.96). The proportion of criteria-abiding problems increased significantly (p<0.0002) from over 80% (QS: good) to over 90% (QS: excellent).

Discussion: After fhe intervention the proportion of criteria-abiding problems increased to levels of excellency, allowing for care of the highest quality and safety. The authors envision subsequent quality cycles aimed at assessing problems being under-registered, outdated, redundant or inappropriately coded according to the International Classification of Primary Care.
pn-CCDs in a Low-Background Environment: Detector Background of the CAST X-ray Telescope
Creators: name: Kuster, M.
name: Cebrian, S.
name: Rodriquez, A.
name: Kotthaus, R.
name: Braeuninger, H.
name: Franz, J.
name: Friedrich, P.
name: Hartmann, R.
name: Kang, D.
name: Lutz, G.
name: Strueder, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The CAST experiment at CERN (European Organization of Nuclear Research) searches for axions from the sun. The axion is a pseudoscalar particle that was motivated by theory thirty years ago, with the intention to solve the strong CP problem. Together with the neutralino, the axion is one of the most promising dark matter candidates. The CAST experiment has been taking data during the last two years, setting an upper limit on the coupling of axions to photons more restrictive than from any other solar axion search in the mass range below 0.1 eV. In 2005 CAST will enter a new experimental phase extending the sensitivity of the experiment to higher axion masses. The CAST experiment strongly profits from technology developed for high energy physics and for X-ray astronomy: A superconducting prototype LHC magnet is used to convert potential axions to detectable X-rays in the 1-10 keV range via the inverse Primakoff effect. The most sensitive detector system of CAST is a spin-off from space technology, a Wolter I type X-ray optics in combination with a prototype pn-CCD developed for ESA's XMM-Newton mission. As in other rare event searches, background suppression and a thorough shielding concept is essential to improve the sensitivity of the experiment to the best possible. In this context CAST offers the opportunity to study the background of pn-CCDs and its long term behavior in a terrestrial environment with possible implications for future space applications. We will present a systematic study of the detector background of the pn-CCD of CAST based on the data acquired since 2002 including preliminary results of our background simulations.
description: 11 pages, 8 figures, to appear in Proc. SPIE 5898, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV
Extrasolar Planet Interactions
Creators: name: Barnes, Rory
name: Greenberg, Richard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The dynamical interactions of planetary systems may be a clue to their formation histories. Therefore, the distribution of these interactions provides important constraints on models of planet formation. We focus on each system's apsidal motion and proximity to dynamical instability. Although only ~25 multiple planet systems have been discovered to date, our analyses in these terms have revealed several important features of planetary interactions. 1) Many systems interact such that they are near the boundary between stability and instability. 2) Planets tend to form such that at least one planet's eccentricity periodically drops to near zero. 3) Mean-motion resonant pairs would be unstable if not for the resonance. 4) Scattering of approximately equal mass planets is unlikely to produce the observed distribution of apsidal behavior. 5) Resonant interactions may be identified through calculating a system's proximity to instability, regardless of knowledge of angles such as mean longitude and longitude of periastron (e.g. GJ 317 b and c are probably in a 4:1 resonance). These properties of planetary systems have been identified through calculation of two parameters that describe the interaction. The apsidal interaction can be quantified by determining how close a planet is to an apsidal separatrix (a boundary between qualitatively different types of apsidal oscillations, e.g. libration or circulation of the major axes). The proximity to instability can be measured by comparing the observed orbital elements to an analytic boundary that describes a type of stability known as Hill stability. We have set up a website dedicated to presenting the most up-to-date information on dynamical interactions: http://www.lpl.arizona.edu/~rory/research/xsp/dynamics
description: 10 pages, 3 figures, 1 table. To appear in the proceedings of IAU Symposium 249: Exoplanets: Detection, Formation and Dynamics, held in Suzhou, China, Oct 22-26 2007. A version with full resolution figures is available at http://www.lpl.arizona.edu/~rory/publications/bg08a.pdf
Personal identity and neurotechnology: ethical reflections on modulating habit formation
Creators: name: Larrivee, Denis
name: Echarte, Luis
name: Gini, Adriana
Publisher: name: F1000Research
Year: 2015

description: In this abstract we discuss ethical challenges posed by contemporary neurotechnology that may modify endorsement of, and access to, habit circuits that are constitutive of personal identity. Derek Parfit's dictum "personal identity is not what matters" offers a subtle rejoinder that identity is processional and transformative (1984, p. 241), tacitly suggesting how qualities of identity can become integral to self expression. From his extreme version of the so-called hypothesis of continuity, personal identity is marked by such dispositional qualities, understood as tendencies toward expressed behavior. These, in turn, can be potentiated by reinforcement, and converted into habits with an attendant cerebral remodeling. From him, thus, what is important and particular about each human being is the fact that a given human being can describe himself as an individual whose qualifying stream of consciousness is unbounded. Biologically, remodeling is assumed to proceed through a suite of structural and functional neuroplastic changes consisting of microanatomical, biochemical, and neurophysiological modifications of brain tissue. Access to habits is postulated to be routed via conscious and preconscious deliberation (Dennett 1984, p.56), processes which themselves can become habits and to incur some form of neuroplastic potentiation. Modification of routes of access to habit circuitry, which can occur in some forms of mind to mind technology, may thus mitigate biological mechanisms subserving the expression and/or structuring of personal identity. Four challenges arising from current mind to mind and mind to machine technology are considered. Supra networks formed by the technology can 1) bypass access to habit formation to yield social addiction, 2) generate interpersonal creation of new habits that are independent of agent endorsement (experiences of inauthenticity, for example), 3) exert interpersonal control over previously established habits, and 4) yield unspecified changes such as apathy and alienation. In circumstances where personal endorsement is compromised the shift in source of agency may become unstable, yielding a capricious locus of agency, or stable, through power dominance of a subset of network participants. Agency locus may also become stable when participants share common values that are normative for structuring virtuous habits. Besides, the formation of virtues gives preference to intentions of enhancement that are based in rational arguments over those which are just mechanistic drives founded by blind efficient causes. We propose that the formation of virtuous habits can preserve or, at least, provide for a more coherent personal identity in cases where agency is compromised directly or indirectly through neurotechnology.

References
Parfit D. Reasons and Persons. Oxford: Clarendon Press, 1984.
Dennett DC. Elbow room: the varieties of free will worth wanting. Cambridge a: MIT Press, 1984.
A cosmological "probability event horizon" and its observational implications
Creators: name: Coward, D. M.
name: Burman, R. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Suppose an astronomer is equipped with a device capable of detecting emissions -- whether they be electromagnetic, gravitational, or neutrino -- from transient sources distributed throughout the cosmos. Because of source rate density evolution and variation of cosmological volume elements, the sources first detected when the machine is switched on are likely to be ones in the high-redshift universe; as observation time increases, rarer, more local, events will be found. We characterize the observer's evolving record of events in terms of a "probability event horizon", converging on the observer from great distances at enormous speed, and illustrate it by simulating neutron star birth events distributed throughout the cosmos. As an initial application of the concept, we determine the approach of this horizon for gamma-ray bursts (GRBs) by fitting to redshift data. The event rates required to fit the model are consistent with the proposed link between core-collapse supernovae and a largely undetected population of faint GRBs.
description: 8 pages, 8 figures, accepted by MNRAS
Stacked phase-space density of galaxies around massive clusters: Comparison of dynamical and lensing masses
Creators: name: Shirasaki, Masato
name: Egami, Eiichi
name: Okabe, Nobuhiro
name: Miyazaki, Satoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a measurement of average histograms of line-of-sight velocities over pairs of galaxies and galaxy clusters. Since the histogram can be measured at different galaxy-cluster separations, this observable is commonly referred to as the stacked phase-space density. We formulate the stacked phase-space density based on a halo-model approach so that the model can be applied to real samples of galaxies and clusters. We examine our model by using an actual sample of massive clusters with known weak-lensing masses and spectroscopic observations of galaxies around the clusters. A likelihood analysis with our model enables us to infer the spherical-symmetric velocity dispersion of observed galaxies in massive clusters. We find the velocity dispersion of galaxies surrounding clusters with their lensing masses of $1.1\times10^{15}\, h^{-1}M_{\odot}$ to be $1180^{+83}_{-70}\, \mathrm{km/s}$ at the 68\% confidence level. Our constraint confirms that the relation between the galaxy velocity dispersion and the host cluster mass in our sample is consistent with the prediction in dark-matter-only N-body simulations under General Relativity. Assuming that the Poisson equation in clusters can be altered by an effective gravitational constant of $G_\mathrm{eff}$, our measurement of the velocity dispersion can place a tight constraint of $0.88 < G_\mathrm{eff}/G_\mathrm{N} < 1.29\, (68\%)$ at length scales of a few Mpc about $2.5$ Giga years ago, where $G_\mathrm{N}$ is the Newton's constant.
description: 22 pages, 8 figures, 3 tables. Accepted for publication in MNRAS
QED$_3$-inspired three-dimensional conformal lattice gauge theory without fine-tuning
Creators: name: Karthik, Nikhil
name: Narayanan, Rajamani
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a conformal lattice theory with only gauge degrees of freedom based on the induced non-local gauge action in QED$_3$ coupled to large number of flavors $N$ of massless two-component Dirac fermions. This lattice system displays signatures of criticality in gauge observables, without any fine-tuning of couplings and can be studied without Monte Carlo critical slow-down. By coupling exactly massless fermion sources to the lattice gauge model, we demonstrate that non-trivial anomalous dimensions are induced in fermion bilinears depending on the dimensionless electric charge of the fermion. We present a proof-of-principle lattice computation of the Wilson-coefficients of various fermion bilinear three-point functions. Finally, by mapping the charge $q$ of fermion in the model to a flavor $N$ in massless QED$_3$, we point to an universality in low-lying Dirac spectrum and an evidence of self-duality of $N=2$ QED$_3$.
description: Minor changes to title and text. Version to be published in PRL
Moduli Space of Non-Abelian Vortices
Creators: name: Eto, Minoru
name: Isozumi, Youichi
name: Nitta, Muneto
name: Ohashi, Keisuke
name: Sakai, Norisuke
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We completely determine the moduli space M_{N,k} of k-vortices in U(N) gauge theory with N Higgs fields in the fundamental representation. Its open subset for separated vortices is found as the symmetric product (C x CP^{N-1})^k / S_k. Orbifold singularities of this space correspond to coincident vortices and are resolved resulting in a smooth moduli manifold. Relation to Kahler quotient construction is discussed.
description: 11 pages, no figures, references added, v3: typos corrected, references added, the final version in PRL
Loop-Level Double-Copy for Massive Quantum Particles
Creators: name: Carrasco, John Joseph M.
name: Vazquez-Holm, Ingrid A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We find that scattering amplitudes in massive scalar QCD can manifest the duality between color and kinematics at loop-level. Specifically we construct the one-loop integrands for four-point scattering between two distinct massive scalars, and the five-point process encoding the first correction to massive scalar scattering with gluonic radiation. We find that factorization and the color-kinematics duality are sufficient principles to entirely bootstrap these calculations, allowing us to construct all contributions ultimately from the three-point tree-level amplitudes which are themselves entirely constrained by symmetry. Double-copy construction immediately provides the associated predictions for massive scalars scattering in the so called N=0 supergravity theory.
description: 18 pages, 13 figures, machine readable amplitudes in ancillary files
A Stationary Kyle Setup: Microfounding propagator models
Creators: name: Vodret, Michele
name: Mastromatteo, Iacopo
name: Tóth, Bence
name: Benzaquen, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We provide an economically sound micro-foundation to linear price impact models, by deriving them as the equilibrium of a suitable agent-based system. Our setup generalizes the well-known Kyle model, by dropping the assumption of a terminal time at which fundamental information is revealed so to describe a stationary market, while retaining agents' rationality and asymmetric information. We investigate the stationary equilibrium for arbitrary Gaussian noise trades and fundamental information, and show that the setup is compatible with universal price diffusion at small times, and non-universal mean-reversion at time scales at which fluctuations in fundamentals decay. Our model provides a testable relation between volatility of prices, magnitude of fluctuations in fundamentals and level of volume traded in the market.
description: 25 pages, 8 figures, added references
Cavity and replica methods for the spectral density of sparse symmetric random matrices
Creators: name: Susca, Vito A R
name: Vivo, Pierpaolo
name: Kühn, Reimer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We review the problem of how to compute the spectral density of sparse symmetric random matrices, i.e. weighted adjacency matrices of undirected graphs. Starting from the Edwards-Jones formula, we illustrate the milestones of this line of research, including the pioneering work of Bray and Rodgers using replicas. We focus first on the cavity method, showing that it quickly provides the correct recursion equations both for single instances and at the ensemble level. We also describe an alternative replica solution that proves to be equivalent to the cavity method. Both the cavity and the replica derivations allow us to obtain the spectral density via the solution of an integral equation for an auxiliary probability density function. We show that this equation can be solved using a stochastic population dynamics algorithm, and we provide its implementation. In this formalism, the spectral density is naturally written in terms of a superposition of local contributions from nodes of given degree, whose role is thoroughly elucidated. This paper does not contain original material, but rather gives a pedagogical overview of the topic. It is indeed addressed to students and researchers who consider entering the field. Both the theoretical tools and the numerical algorithms are discussed in detail, highlighting conceptual subtleties and practical aspects.
description: 52 pag., 5 fig. Typos fixed. Submission to SciPost
Nifty Web Apps: Build a Web App for Any Text-Based Programming Assignment
Creators: name: Lin, Kevin
name: Guha, Sumant
name: Spaniac, Joe
name: Zheng, Andy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: K.3.2

description: While many students now interact with web apps across a variety of smart devices, the vast majority of our Nifty Assignments still present traditional user interfaces such as console input/output and desktop GUI. In this tutorial session, participants will learn to build simple web apps for programming assignments that execute student-written code to dynamically respond to user interactions resulting in a more modern app experience. Our approach requires up to 75% less code than similar desktop GUI apps while requiring few (if any) modifications to existing assignments. Instructors and students alike can run and modify these web apps on their own computers or deploy their apps online for access from any smart device at no cost. The tutorial presents examples from CS1 and CS2 courses in Python and Java, but the ideas apply generally.
description: Special session submission in Proceedings of the 52nd ACM Technical Symposium on Computer Science Education (SIGCSE '21); 2 pages; 1 figure
Fast Fourier Transform Simulation Techniques for Coulomb Gases
Creators: name: Duncan, A.
name: Sedgewick, R. D.
name: Coalson, R. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: An improved approach to updating the electric field in simulations of Coulomb gases using the local lattice technique introduced by Maggs and Rossetto, is described and tested. Using the Fast Fourier Transform (FFT) an independent configuration of electric fields subject to Gauss' law constraint can be generated in a single update step. This FFT based method is shown to outperform previous approaches to updating the electric field in the simulation of a basic test problem in electrostatics of strongly correlated systems.
description: 5 pages, 3 figures
Some aspects of positive kernel method of quantization
Creators: name: Odzijewicz, Anatol
name: Horowski, Maciej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discuss various aspects of positive kernel method of quantization of the one-parameter groups $τ_t \in \mbox{Aut}(P,\vartheta)$ of automorphisms of a $G$-principal bundle $P(G,π,M)$ with a fixed connection form $\vartheta$ on its total space $P$. We show that the generator $\hat{F}$ of the unitary flow $U_t = e^{it \hat{F}}$ being the quantization of $τ_t $ is realized by a generalized Kirillov-Kostant-Souriau operator whose domain consists of sections of some vector bundle over $M$, which are defined by suitable positive kernel. This method of quantization applied to the case when $G=GL(N,\mathbb{C})$ and $M$ is a non-compact Riemann surface leads to quantization of the arbitrary holomorphic flow $τ_t^{hol} \in \mbox{Aut}(P,\vartheta)$. For the above case, we present the integral decompositions of the positive kernels on $P\times P$ invariant with respect to the flows $τ_t^{hol}$ in terms of spectral measure of $\hat{F}$. These decompositions generalize the ones given by Bochner theorem for a positive kernels on $\mathbb{C} \times \mathbb{C}$ invariant with respect to the one-parameter groups of translations of complex plane.
Covariant approach to the thermodynamic structure of a generic null surface
Creators: name: Dey, Sumit
name: Majhi, Bibhas Ranjan
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We readdress the thermodynamic structure of geometrical relations on a generic null surface. Among three potential candidates, originated from different components of $R_{ab}$ along the null vectors for the surface (i.e. $R_{ab}q^a_cl^b$, $R_{ab}l^al^b$ and $R_{ab}l^ak^b$ where $q_{ab}$ is the projector on the null surface and $l^a$, $k^a$ are null normal and corresponding auxiliary vector of it, respectively), the first one leads to Navier-Stokes like equation. Here we devote our investigation on the other two members. We find that $R_{ab}l^al^b$, which yields the evolution equation for expansion parameter corresponding to $l^a$ along itself, can be interpreted as a thermodynamic relation when integrated on the two dimensional transverse subspace of the null hypersurface along with a virtual displacement in the direction of $l^a$. Moreover for a stationary background the integrated version of it yields the general form of Smarr formula. Although this is more or less known in literature, but a similar argument for the evolution equation of the expansion parameter corresponding to $k^a$ along $l^a$, provided by $R_{ab}l^ak^b$, leads to a more convenient form of thermodynamic relation. In this analysis, contrary to earlier approaches, the identified thermodynamic entities come out to be in covariant forms and also are foliation independent. Hence these can be applied to any coordinate system adapted to the null hypersurface. Moreover, these results are not restricted to any specific parametrisation of $k^a$ and also $k^a$ need not be hypersurface orthogonal. In addition, here any particular dynamical equation for metric is not being explicitly used and therefore we feel that our results are solely based on the properties of the null surface.
description: Minor corrections, comments added, to appear in Phys. Rev. D