cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Current Sheets Formation in Tangled Coronal Magnetic Fields
Creators: name: Rappazzo, A. F.
name: Parker, E. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the dynamical evolution of magnetic fields in closed regions of solar and stellar coronae. To understand under which conditions current sheets form, we examine dissipative and ideal reduced magnetohydrodynamic models in cartesian geometry, where two magnetic field components are present: the strong guide field $B_0$, extended along the axial direction, and the dynamical orthogonal field $\mathbf{b}$. Magnetic field lines thread the system along the axial direction, that spans the length $L$, and are line-tied at the top and bottom plates. The magnetic field $b$ initially has only large scales, with its gradient (current) length-scale of order $\ell_b$. We identify the magnetic intensity threshold $b/B_0 \sim \ell_b/L$. For values of $b$ below this threshold, field-line tension inhibits the formation of current sheets, while above the threshold they form quickly on fast ideal timescales. In the ideal case, above the magnetic threshold, we show that current sheets thickness decreases in time until it becomes smaller than the grid resolution, with the analyticity strip width $δ$ decreasing at least exponentially, after which the simulations become under-resolved.
description: 6 pages, 5 figures, ApJ Letters (accepted)
title: Industrial Heat Pumps in the Danish Energy System – Current Situation, Potentials and Outlook
titleType: Subtitle
Creators: name: Heat Pump Center, Benjamin Zühlsdorf,
Publisher: name: Heat Pump Center
Year: 2019

description: Heat pumps are considered to be a key technology in the transition of the Danish energy system. The technology was
successfully demonstrated by several installations in district heating, while the number of industrial applications is
limited. In the context of district heating, the focus of R&D is shifting to issues of upscaling and operation as well as
to exploiting further benefits. For industrial applications the focus lies on simplifying the optimal integration of heat
pumps and enabling higher supply temperatures. This article summarizes the current situation and gives an overview
of current and future developments in the field of industrial heat pumps.
SIDDHARTA impact on $\bar{K}N$ amplitudes used in in-medium applications
Creators: name: Cieply, Ales
name: Smejkal, Jaroslav
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have performed new fits of our chirally motivated coupled--channels model for meson-baryon interactions and discussed the impact of the SIDDHARTA measurement on the $\bar{K}N$ amplitudes in the free space and in nuclear medium. The kaon--nucleon amplitudes generated by the model are fully consistent with our earlier studies that used the older kaonic hydrogen data by the DEAR collaboration. The subthreshold energy dependence of the in-medium $\bar{K}N$ amplitudes plays a crucial role in $\bar{K}$--nuclear applications.
description: 4 pages, published in Proceedings of the MESON 2012 conference, Cracow, Poland, May 31 - June 5, 2012
Sustainable treatment of acidic and alkaline leachates from mining and industrial activities: current practice and future perspectives
Creators: name: O'DWYER, TOM
name: Ghanim, Bashir
name: COURTNEY, RONAN
name: Hudson, Ashlene
name: PEMBROKE, TONY
name: MURNANE, JOHN
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Biological sciences
subject: FOS: Biological sciences
subject: Engineering

description: Water resources are under continued pressure from anthropogenic sources, including acidic waste from abandoned mine sites and alkaline waste from a variety of industrial activities. Large quantities of mine and industrial wastes are typically stored in tailings facilities which can generate significant quantities of leachates due to weathering. If released untreated to the aquatic environment these have the potential to contaminate surface and ground waters. In addition, generation of leachates from abandoned or closed sites presents a major long-term environmental challenge where the generation of leachates is expected to continue for decades if not centuries post closure. An overview of leachate production and associated treatment technologies are described, with an emphasis on passive and potentially sustainable technologies. Measures to prevent the formation of acidic leachates and the potential for resource recovery from acidic and alkaline wastes and leachates are also discussed. Finally, technologies that require further development for long term and sustainable treatment are highlighted.
Surface Transfer Doping of Oxidized Silicon Terminated (111) Diamond with MoO3
Creators: name: Oslinker, Brian
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 510201
subject: Atomic and molecular physics
classificationCode: 510203
subject: Nonlinear optics and spectroscopy
classificationCode: 340604
subject: Electrochemistry

description: Submitted in total fulfillment of the requirements for the degree of Master of Science to the Department of Mathematical and Physical Sciences, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Victoria, Australia.
Investigations on the occurrence of fungal root endophytes and an associated mycovirus in context with apple replant disease
Creators: name: Popp, Gösta Carolin Dorette
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2020
Subjects: subject: mycovirus
subject: Nectriaceae
subject: Bio Test
subject: Mykovirus
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: Apple replant disease (ARD) negatively affects the production in nurseries and orchards worldwide. A biotic cause of the disease is most likely since soil disinfection can restore plant growth. Fungi have appeared to contribute to the complex of biotic factors, but up to now the actual cause of the disease remains unknown. Further, environmentally friendly and practically applicable mitigation strategies are missing. Fungal root endophytes were isolated in two central experiments of the ORDIAmur consortium. Dark septate endophytes (Leptodontidium spp.) were frequently isolated from apple roots. An abundant occurrence of Nectriaceae fungi (Dactylonectria torresensis and Ilyonectria robusta) was found in ARD roots. Reference sites displayed a different characteristic fungal community. In roots grown in irradiated soil, a reduction of the number of isolated fungi and a changed composition of the fungal community was found. To investigate the effect of fungal endophytes on apple plants a quick and soil-free bio test in Petri dishes was developed using perlite. Inoculated fungi isolated from ARD roots induced neutral (Plectosphaerella, Pleotrichocladium, and Zalerion) to negative (Cadophora, Calonectria, Dactylonectria, Ilyonectria, and Leptosphaeria) plant reactions. After re-isolation, most of the Nectriaceae isolates were confirmed as pathogens. Microscopic analyses of ARD-affected roots revealed necroses caused by an unknown fungus that forms cauliflower-like (CF) structures in diseased cortex cells. Two extraction methods, Harris Uni-Core punch and laser microdissection, were applied to further identify the fungus by PCR. Different Nectriaceae species were identified which form intracellular CF structures during the infection process. Both extraction methods can be used to identify also yet unculturable fungi from selected root areas of interest and help to avoid time-consuming isolations. Mycoviruses can influence their fungal hosts in several ways and may alter virulence (hyper- or hypovirulence) or toxin production. A hypovirulence-associated mycovirus has the potential to act as a sustainable control of fungal plant pathogens. Here, the sequence of a novel dsRNA virus originating from Dactylonectria torresensis is described, named Dactylonectria torresensis alternavirus 1 (DtAV1), which is a putative member of “Alternaviridae”. In this work, Nectriaceae were demonstrated to be involved in ARD. Further investigations of microorganism and plant interactions are needed to clarify the cause of the disease, which will then help to develop targeted control strategies.
The embodiment of identity : body preferences, health decisions and identity in the island of Trinidad
Creators: name: Waske, Marlene
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2020
Subjects: subject: ethnicity
subject: obesity
subject: body ideals
subject: body preferences
subject: trust
subject: food choice
subject: lab-in-the-field experiment
subject: trust game
subject: Ethnizität
subject: Übergwicht
subject: Vertrauensspiel
subject: Feldexperiment
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: This dissertation contributes to understanding the linkage between ethnicity, gender, and body preferences, as well as between ethnicity, gender, and drink choice. It relates its fndings to potential implications for health policy in the context of rising global obesity rates. It focuses on the island of Trinidad, Republic of Trinidad and Tobago.
Expectation Maximization for Hard X-ray Count Modulation Profiles
Creators: name: Benvenuto, Federico
name: Schwartz, Richard
name: Piana, Michele
name: Massone, Anna Maria
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 85-08, 65F22

description: This paper is concerned with the image reconstruction problem when the measured data are solar hard X-ray modulation profiles obtained from the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI)} instrument. Our goal is to demonstrate that a statistical iterative method classically applied to the image deconvolution problem is very effective when utilized for the analysis of count modulation profiles in solar hard X-ray imaging based on Rotating Modulation Collimators. The algorithm described in this paper solves the maximum likelihood problem iteratively and encoding a positivity constraint into the iterative optimization scheme. The result is therefore a classical Expectation Maximization method this time applied not to an image deconvolution problem but to image reconstruction from count modulation profiles. The technical reason that makes our implementation particularly effective in this application is the use of a very reliable stopping rule which is able to regularize the solution providing, at the same time, a very satisfactory Cash-statistic (C-statistic). The method is applied to both reproduce synthetic flaring configurations and reconstruct images from experimental data corresponding to three real events. In this second case, the performance of Expectation Maximization, when compared to Pixon image reconstruction, shows a comparable accuracy and a notably reduced computational burden; when compared to CLEAN, shows a better fidelity with respect to the measurements with a comparable computational effectiveness. If optimally stopped, Expectation Maximization represents a very reliable method for image reconstruction in the RHESSI context when count modulation profiles are used as input data.
title: Economic Contributions of Atlantic Highly Migratory Species Anglers and Tournaments, 2016
Creators: name: Hutt, Clifford P.
name: Silva, George
Publisher: name: United States. National Oceanic and Atmospheric Administration. Office of Oceanic and Atmospheric Research. United States. Office of Sustainable Fisheries
Year: 2019

description: NOAA technical memorandum NMFS-OSF; 8
A Kinematic Approach To Assessing Environmental Effects: Star-Forming Galaxies in a z~0.9 SpARCS cluster using Spitzer 24um Observations
Creators: name: Noble, A. G.
name: Webb, T. M. A.
name: Muzzin, A.
name: Wilson, G.
name: Yee, H. K. C.
name: van der Burg, R. F. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an infrared study of a z=0.872 cluster, SpARCS J161314+564930, with the primary aim of distinguishing the dynamical histories of spectroscopically confirmed star-forming members to assess the role of cluster environment. We utilize deep MIPS imaging and a mass-limited sample of 85 spectroscopic members to identify 16 24um-bright sources within the cluster, and measure their 24um star formation rates (SFRs) down to ~6 Msolar/year. Based on their line-of-sight velocities and stellar ages, MIPS cluster members appear to be an infalling population that was recently accreted from the field with minimal environmental dependency on their star formation. However, we identify a double-sequenced distribution of star-forming galaxies amongst the members, with one branch exhibiting declining specific SFRs with mass. The members along this sub-main sequence contain spectral features suggestive of passive galaxies. Using caustic diagrams, we kinematically identify these galaxies as a virialized and/or backsplash population. Moreover, we find a mix of dynamical histories at all projected radii, indicating that standard definitions of environment (i.e., radius and density) are contaminated with recently accreted interlopers, which could contribute to a lack of environmental trends for star-forming galaxies. A cleaner narrative of their dynamical past begins to unfold when using a proxy for accretion histories through profiles of constant (r/r_200)x(Delta v/sigma_v); galaxies accreted at earlier times possess lower values of (r/r_200)x(Delta v/sigma_v) with minimal contamination from the distinct infalling population. Therefore, adopting a time-averaged definition for density (as traced by accretion histories) rather than an instantaneous density yields a depressed specific SFR within the dynamical cluster core.
description: 14 pages, 10 figures, 1 table; accepted for publication in ApJ
Can supermassive black hole seeds form in galaxy mergers?
Creators: name: Ferrara, A.
name: Haardt, F.
name: Salvaterra, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: It has been recently suggested that supermassive black holes at z = 5-6 might form from super-fast (\dot M > 10^4 Msun/yr) accretion occurring in unstable, massive nuclear gas disks produced by mergers of Milky-Way size galaxies. Interestingly, such mechanism is claimed to work also for gas enriched to solar metallicity. These results are based on an idealized polytropic equation of state assumption, essentially preventing the gas from cooling. We show that under more realistic conditions, the disk rapidly (< 1 yr) cools, the accretion rate drops, and the central core can grow only to \approx 100 Msun. In addition, most of the disk becomes gravitationally unstable in about 100 yr, further quenching the accretion. We conclude that this scenario encounters a number of difficulties that possibly make it untenable.
description: MNRAS Letter. 6 pages, 3 Figures. Comments welcome
Thermal stability of Ba1-xCaxF2 solid solutions
Creators: name: Düvel, Andre
name: Heitjans, Paul
name: Fedorov, Pavel P.
name: Voronov, Valerii V.
name: Pynenkov, Aleksandr A.
name: Nishchev, Konstantin N.
Publisher: name: Amsterdam : Elsevier
Year: 2018
Subjects: subject: High-energy ball milling
subject: DSC
subject: Thermal phase stability
subject: Fluoride
subject: Solid solution
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Ba1-xCaxF2 samples with fluorite-type structure were prepared by high-energy ball milling. DSC measurements revealed exothermic decomposition at temperatures of about 450 °C. Decomposition was also observed by high temperature X-ray experiments. As a product, two phases with compositions close to pure BaF2 and CaF2 were obtained. The decomposition temperature observed by X-ray measurements is lower than in the DSC experiments. This might indicate that X-ray irradiation could foster the decomposition.
title: Endangered Species Act Section 7(a)(2) Biological Opinion and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for the 10th Avenue Street Improvements, Clark County, Washington (HUC 170900120401)
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation ; WCRO-2019-01137
Gravothermal Catastrophe: the dynamical stability of a fluid model
Creators: name: Sormani, M. C.
name: Bertin, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A re-investigation of the gravothermal catastrophe is presented. By means of a linear perturbation analysis, we study the dynamical stability of a spherical self-gravitating isothermal fluid of finite volume and find that the conditions for the onset of the gravothermal catastrophe, under different external conditions, coincide with those obtained from thermodynamical arguments. This suggests that the gravothermal catastrophe may reduce to Jeans instability, rediscovered in an inhomogeneous framework. We find normal modes and frequencies for the fluid system and show that instability develops on the dynamical time scale. We then discuss several related issues. In particular: (1) For perturbations at constant total energy and constant volume, we introduce a simple heuristic term in the energy budget to mimic the role of binaries. (2) We outline the analysis of the two-component case and show how linear perturbation analysis can be carried out also in this more complex context in a relatively straightforward way. (3) We compare the behavior of the fluid model with that of the collisionless sphere. In the collisionless case the instability seems to disappear, which is at variance with the linear Jeans stability analysis in the homogeneous case; we argue that a key ingredient to understand the difference (a spherical stellar system is expected to undergo the gravothermal catastrophe only in the presence of some collisionality, which suggests that the instability is dissipative and not dynamical) lies in the role of the detailed angular momentum in a collisionless system. Finally, we briefly comment on the meaning of the Boltzmann entropy and its applicability to the study of the dynamics of self- gravitating inhomogeneous gaseous systems.
description: accepted for publication in Astronomy & Astrophysics
PREVALENCE AND RISK FACTORS OF HUMAN PAPILLOMAVIRUS INFECTION AMONG WOMEN IN SOKOTO STATE, NIGERIA
Creators: name: Amina, R. Mohammed
name: Halima, B. Sulaiman
name: Aisha, T. Abubakar
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Prevalence, risk factors, Human papilloma virus and women.

description: Human Papilloma Virus (HPV) infection is the primary cause of virtually all cervical cancers. Cervical cancer despite being largely preventable is still the leading cause of gynaecological cancer related death among females in developing countries. This study was carried out to determine the prevalence and risk factors associated with Human Papilloma Virus infection among women attending selected hospitals in Sokoto, Sokoto State, Nigeria. This study involves the use of questionnaire to obtain data on socio-demographic and risk factors as well as the analysis of high vaginal swab obtained from 208 women. The high vaginal swab samples were analysed for Human Papilloma Virus antigen using ELISA. Prevalence of 6.23% of Human papilloma virus infection was recorded in this study. Marital status, cigarette smoking, number of Co-wives, use of condom and age at first sex were identified as significant risk factors for Human papilloma virus infection in this study. This study identified a low burden of Human papilloma virus infection in Sokoto, Nigeria.
Sound joined actions in rowing and swimming
Creators: name: Schmitz, Gerd
name: Effenberg, Alfred O.
Publisher: name: Amsterdam : John Benjamins
Year: 2017
Subjects: subject: internal modelling
subject: motor control
subject: sonification
subject: motion perception
subject: multisensory integration
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::790 | Freizeitgestaltung, Darstellende Kunst::796 | Sport

description: The present chapter introduces the method of sonification as a tool for studying intercorporeality and enactment. We show that auditory movement information can support motor perception as well as the control of movements, and explain these effects by mechanisms which are consistent with the enactment approach. Providing additional auditory information about a movement enables the acting individual as well as observers to perceive the movement in exactly the same way via audition. Thus, a sonification can establish a common percept for all interaction partners, which corresponds well to the concept of intercorporeality. Furthermore, we show that sonifications can be specifically designed to constitute a variety of frameworks for the analysis of interpersonal coordination and intercorporeality.
title: Endangered Species Act Section 7(a)(2) Biological Opinion for the Buck Creek Allotment in the Westsid Range Analysis, Wallowa County, Oregon, HUC 1706010602
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation : WCRO-2019-00412
Trajectory generation and display for free flight
Creators: name: Shahzad, Mohammad
name: Mora-Camino, Félix
name: Slama, Jules Ghislain
name: Achaibou, Karim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: Robotics (cs.RO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this study a new approach is proposed for the generation of aircraft trajectories. The relative guidance of an aircraft, which is aimed to join in minimum time the track of a leader aircraft, is particularly considered. In a first place, a minimum time relative convergence problem is considered and optimal trajectories are characterized. Then the synthesis of a neural approximator for optimal trajectories is discussed. Trained neural networks are used in an adaptive manner to generate intent trajectories during operation. Finally simulation results involving two wide body aircraft are presented.
ВЗАИМОСВЯЗЬ МОРФО-БИОХИМИЧЕСКИХ ПОКАЗАТЕЛЕЙ, КАК ИНСТРУМЕНТ ПОВЫШЕНИЯ ЭФФЕКТИВНОСТИ ДИАГНОСТИКИ ЗАБОЛЕВАНИЙ ПЕЧЕНИ У ВЫСОКОПРОДУКТИВНЫХ КОРОВ
Creators: name: Шкуратова, Ирина Алексеевна
name: Дроздова, Людмила Ивановна
name: Белоусов, Александр Иванович
name: Красноперов, Александр Сергеевич
Publisher: name: Zenodo
Year: 2023

description: Проведен анализ результатов морфологических исследований печени, разной степени тяжести поражения у коров голштинской породы (n=34) 2-4 лактации (2,68±0,81 лактаций) со средней продуктивностью по предыдущей лактации 34,35±4,78 л/день. Отбор проб биоматериала проводили у выбракованных из основного стада коров. Кровь для биохимиче-ского анализа отбирали перед убоем из подхвостовой вены в вакуумные пробирки с активатором свертывания. Корреляци-онную взаимосвязь между биохимическими параметрами крови и морфологическими изменениями структуры печени. Прижизненно проводили анализ крови на содержание ферментов, характеризующих функциональное состояние печени (аспартатаминотрансферазы, щелочной фосфатазы, гамма-глутамилтранспептидазы, глутаматдегидрогеназы). Постмор-тально отбирали кусочки печени для гистологического исследования. На основании анализа морфо-биохимических парал-лелей были выделены три профиля метаболического здоровья коров: «спокойный», «напряженный» и «патологический». Установлено, что изменения индикаторных ферментов, характеризующих состояние гепатобилиарной системы, имеют вы-сокую степень корреляции с глубиной морфологических изменений в органе. При гистологическом исследовании коров с установленным «патологическим» профилем в печени выявлены значительные деструктивные процессы как в паренхима-тозных, так и в мезенхимальных структурах. Определено глубокое нарушение белкового (амилоидоз) и липидного обмена (тотальная жировая дистрофия), установлено варикозное расширение кровеносных сосудов печени, приводящее к застою, кровоизлияниям и некрозу гепатоцитов. При биохимическом исследовании крови у животных данной группы отмечена высокая активность аспартатаминотрансферазы – 182,45±65,59 Ед/л, гамма-глутамилтрансферазы – 61,10±90,93 Ед/л и глу-таматдегидрогеназы – 147,95±104,71 Ед/л.
Self-consistent calculation of spin transport and magnetization dynamics
Creators: name: Lee, Kyung-Jin
name: Stiles, M. D.
name: Lee, Hyun-Woo
name: Moon, Jung-Hwan
name: Kim, Kyoung-Whan
name: Lee, Seo-Won
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A spin-polarized current transfers its spin-angular momentum to a local magnetization, exciting current-induced magnetization dynamics. So far, most studies in this field have focused on the direct effect of spin transport on magnetization dynamics, but ignored the feedback from the magnetization dynamics to the spin transport and back to the magnetization dynamics. Although the feedback is usually weak, there are situations when it can play an important role in the dynamics. In such situations, self-consistent calculations of the magnetization dynamics and the spin transport can accurately describe the feedback. This review describes in detail the feedback mechanisms, and presents recent progress in self-consistent calculations of the coupled dynamics. We pay special attention to three representative examples, where the feedback generates non-local effective interactions for the magnetization. Possibly the most dramatic feedback example is the dynamic instability in magnetic nanopillars with a single magnetic layer. This instability does not occur without non-local feedback. We demonstrate that full self-consistent calculations generate simulation results in much better agreement with experiments than previous calculations that addressed the feedback effect approximately. The next example is for more typical spin valve nanopillars. Although the effect of feedback is less dramatic because even without feedback the current can induce magnetization oscillation, the feedback can still have important consequences. For instance, we show that the feedback can reduce the linewidth of oscillations, in agreement with experimental observations. Finally, we consider nonadiabatic electron transport in narrow domain walls. The non-local feedback in these systems leads to a significant renormalization of the effective nonadiabatic spin transfer torque.
description: accepted in Physics Reports (76 pages, 15 figures)
An empirical formula for the distribution function of a thin exponential disc
Creators: name: Sharma, Sanjib
name: Bland-Hawthorn, Joss
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: An empirical formula for a Shu distribution function that reproduces a thin disc with exponential surface density to good accuracy is presented. The formula has two free parameters that specify the functional form of the velocity dispersion. Conventionally, this requires the use of an iterative algorithm to produce the correct solution, which is computationally taxing for applications like Markov Chain Monte Carlo (MCMC) model fitting. The formula has been shown to work for flat, rising and falling rotation curves. Application of this methodology to one of the Dehnen distribution functions is also shown. Finally, an extension of this formula to reproduce velocity dispersion profiles that are an exponential function of radius is also presented. Our empirical formula should greatly aid the efficient comparison of disc models with large stellar surveys or N-body simulations.
description: 11 pages, accepted in ApJ
Exact, singularity-free recasting of the Newtonian potential in continuous media
Creators: name: Huré, Jean-Marc
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The gravitational potential is a key function involved in many astrophysical problems. Its evaluation inside continuous media from Newton's law is known to be challenging because of the diverging kernel 1/|r-r'|. This difficulty is generally treated with avoidance techniques (e.g. multipole expansions, softening length) themselves not without drawbacks. In this article, we present a new path that basically fixes the point-mass singularity problem in systems with, at least, two dimensions. It consists of recasting the gravitational potential in an equivalent integro-differential form, namely the cross-derivative of a "hyperpotential" (i.e., an auxiliary scalar function). In contrast with the potential, the hyperpotential is the convolution of the mass density with a finite amplitude kernel. We show that closed-form expressions for this new kernel can be directly deduced from the potential of homogeneous sheets. We then give a few formulae appropriate to the Cartesian, cylindrical and spherical coordinate systems, including axial symmetry. The method is essentially not limited, either on the geometry of the source or on the distribution, and its implementation is straightforward. Several tests based upon simple quadrature/differentiation schemes are presented (the homogeneous rectangular sheet, cuboid and disk, the Maclaurin disk and a truncated Lane-Emden solution). Compared with a direct summation, the extra computational cost is low and the gain is real: no truncated series, no free parameter, and a relative accuracy better than 1% for typically 16 nodes per spatial direction using the most basic numerical schemes.
description: Accepted for publication in Astron. & Astrophys
Search for η-->e+e- decay with the WASA experiment
Creators: name: Berlowski, Marcin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Nowadays the field of searching for a new physics became a very interesting subject in a light meson decays due to a recent results from KTeV collaboration which found the 3.3σ disagreement between Standard Model theory and their results of π0-->e+e- branching ratio measurement. They propose to explain this discrepancy with a new U boson particle that interacts both with meson and virtual photon producing e+e- pair. The same effect could be observed in eta meson decay into electron-positron. The current branching ratio limit is far away from the predicted non-Standard Model theory and due to that fact it cannot distinguish between Standard Model and more exotic explanation. The following report shows the analysis highlights for searching for a such effect in pp --> pp (η--> e+e-) at 1.4 GeV produced in WASA@COSY experiment.
description: 4 pages, 8 figures
Phase Equilibrium of Binary Mixtures in Mixed Dimensions
Creators: name: Malatsetxebarria, E.
name: Marchetti, F. M.
name: Cazalilla, M. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the stability of a Bose-Fermi system loaded into an array of coupled one-dimensional (1D) "tubes", where bosons and fermions experience different dimensions: Bosons are heavy and strongly localized in the 1D tubes, whereas fermions are light and can hop between the tubes. Using the 174Yb-6Li system as a reference, we obtain the equilibrium phase diagram. We find that, for both attractive and repulsive interspecies interaction, the exact treatment of 1D bosons via the Bethe ansatz implies that the transitions between pure fermion and any phase with a finite density of bosons can only be first order and never continuous, resulting in phase separation in density space. In contrast, the order of the transition between the pure boson and the mixed phase can either be second or first order depending on whether fermions are allowed to hop between the tubes or they also are strictly confined in 1D. We discuss the implications of our findings for current experiments on 174Yb-6Li mixtures as well as Fermi-Fermi mixtures of light and heavy atoms in a mixed dimensional optical lattice system.
description: 12 pages, 6 figures
Train-the-Trainer-Workshop: Open Access für Fachreferent*innen und Open-Access-Beauftrage – Multiplikator*innen für eine offene Wissenschaft
Creators: name: Schirrwagen, Jochen
name: Schönfelder, Nina
name: Schneider, Hannah
Publisher: name: Zenodo
Year: 2022
Subjects: open-access.network
Train-the-Trainer Workshop
Veranstaltungskonzept
Recommenderdienst

description: Die Präsentationen wurden für die Train-the-Trainer-Workshops am 25. und 30.11.2022 erstellt und verwendet. Der Online-Workshop richtete sich an Fachreferent*innen und Open-Access-Beauftragte, , die den wissenschaftlichen Publikationsprozess unterstützen.
 Die beiden Workshops zielten auf die Vermittlung von a) Veranstaltungskonzepten und b) praktischen Tools zum Thema Open-Access-Publizieren am Beispiel der Recommenderdienste oa.finder und B!SON.
 Im Rahmen einer Gruppenarbeit der Teilnehmer*innen wurden exemplarische Veranstaltungsformate zu Open Access entwickelt auf Basis einer Vorlage zur Organisation von Open-Access-Veranstaltungen.
Pacific Biological Laboratories Catalog (Third Edition/Printing)
Creators: name: Ricketts, Edward F.
Publisher: name: Stanford Digital Repository
Year: 2022
Subjects: Edward Ricketts
invertebrates
Pacific Biological Laboratories
catalog

description: Catalog for Edward F. Ricketts' Pacific Biological Laboratories Illustrated with drawings and photographs of marine specimens and supplies. This is a revision of the rare 1925 Pacific Biological Laboratories catalog. 27 pp. Foreword by A.T. Flanders. Third Printing/Edition.
Occurrence Probability of Large Solar Energetic Particle Events: Assessment from Data on Cosmogenic Radionuclides in Lunar Rocks
Creators: name: Kovaltsov, Gennady A.
name: Usoskin, Ilya G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We revisited assessments of the occurrence probability distribution of large events in solar energetic particles (SEP), based on measurements of cosmogenic radionuclides in lunar rocks. We present a combined cumulative occurrence probability distribution of SEP events based on three time scales: directly measured SEP fluences for the last 60 years; estimates based on terrestrial cosmogenic radionuclides 10Be and 14C for the multi-millennial (Holocene) time scale; and cosmogenic radionuclides measured in lunar rocks on the time scale of up to 1 Myr. All the three time scales yield a consistent distribution. The data suggest a strong rollover of the occurrence probability so that SEP events with the fluence of protons with energy >30 MeV greater than 10^{11} (protons /cm2/yr) are not expected at the Myr time scale.
description: Solar Physics, in press
Ricci dark energy in Chern-Simons modified gravity
Creators: name: Silva, J. G.
name: Santos, A. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we have considered the Ricci dark energy model, where the energy density of the universe is proportional to the Ricci scalar curvature, in the dynamic Chern-Simons modified gravity. We show that in this context the evolution of the scale factor is similar to that displayed by the modified Chaplygin gas.
description: 7 pages; to appear in EPJC
Topological protection of bound states against the hybridization
Creators: name: Yang, Bohm-Jung
name: Bahramy, Mohammad Saeed
name: Nagaosa, Naoto
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological invariants are conventionally known to be responsible for protection of extended states against disorder. A prominent example is the presence of topologically protected extended-states in two-dimensional (2D) quantum Hall systems as well as on the surface of three-dimensional (3D) topological insulators. Distinct from such cases, here we introduce a new concept, that is, the topological protection of bound states against hybridization. This situation is shown to be realizable in a 2D quantum Hall insulator put on a 3D trivial insulator. In such a configuration, there exist topologically protected bound states, localized along the normal direction of 2D plane, in spite of hybridization with the continuum of extended states. The one-dimensional edge states are also localized along the same direction as long as their energies are within the band gap. This finding demonstrates the dual role of topological invariants, as they can also protect bound states against hybridization in a continuum.
description: 21 pages, 7 figures
Physical oceanographic data collected between March 2013 and Sept 2015 in nearshore regions of Isla Natividad
Creators: name: Monismith, Stephen
name: Woodson, Clifton
name: Alnajjar, Maha
name: Micheli, Fio
name: Bell, Thomas
name: Boch, Charles
name: Hernandez, Arturo
name: Vazquez-Vera, Leonardo
Publisher: name: Stanford Digital Repository
Year: 2022
Subjects: subject: Ocean currents
subject: Tidal currents
subject: Oceanography--Research
subject: Ocean temperature
subject: Ocean waves

description: This is a set of matlab .mat files along with a readme file that describes the various variables. These data are described in the paper, "Influence of kelp forest biomass on nearshore currents," by Monismith et al. submitted to JGR Oceans in December 2021, and in revised form in April 2022.
Field effect doping of graphene in metal|dielectric|graphene heterostructures: a model based upon first-principles calculations
Creators: name: Bokdam, Menno
name: Khomyakov, Petr A.
name: Brocks, Geert
name: Kelly, Paul J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study how the Fermi energy of a graphene monolayer separated from a conducting substrate by a dielectric spacer depends on the properties of the substrate and on an applied voltage. An analytical model is developed that describes the Fermi level shift as a function of the gate voltage, of the substrate work function, and of the type and thickness of the dielectric spacer. The parameters of this model, that should describe the effect of gate electrodes in field-effect devices, can be obtained from density functional theory (DFT) calculations on single layers or interfaces. The doping of graphene in metal|dielectric|graphene structures is found to be determined not only by the difference in work function between the metal and graphene and the dielectric properties of the spacer but potential steps that result from details of the microscopic bonding at the interfaces also play an important role. The doping levels predicted by the model agree very well with the results obtained from first-principles DFT calculations on metal|dielectric|graphene structures with the metals Al, Co, Ni, Cu, Pd, Ag, Pt or Au, and a h-BN or vacuum dielectric spacer.
Advancements in solar neutrino physics
Creators: name: Antonelli, Vito
name: Miramonti, Lino
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the results of solar neutrino physics, with particular attention to the data obtained and the analyses performed in the last decades, which were determinant to solve the solar neutrino problem (SNP), proving that neutrinos are massive and oscillating particles and contributing to refine the solar models. We also discuss the perspectives of the presently running experiments in this sector and of the ones planned for the near future and the impact they can have on elementary particle physics and astrophysics.
description: 15 pages
Interaction of chlorine with Stone-Wales de- fects in graphene and carbon nanotubes, and thermodynamical prospects of chlorine-induced nanotube unzipping
Creators: name: Ijäs, M.
name: Havu, P.
name: Harju, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the binding of chlorine atoms to carbon nanotubes and graphene at a Stone-Wales defect and to the sidewalls of pristine nanotubes. We show using ab initio thermodynamics that if the environment is chlorine-rich enough, the unzipping of carbon nanotubes into graphene nanoribbons with chlorinated edges may be thermodynamically feasible. By controlling the Cl chemical potential through temperature and pressure, opening selectively tubes below a threshold diameter might be possible. Additionally, we find increased binding energies for chlorine atoms bound to Stone-Wales defects as compared to defect-free graphene and nanotubes, indicating that defects might act as nucleation sites for tube unzipping. On graphene, no more than a single Cl atom may be bound to the defect in ambient conditions, limiting possible Cl-induced changes in the resulting nanoribbons.
Spherically symmetric model stellar atmospheres and limb darkening II: limb-darkening laws, gravity-darkening coefficients and angular diameter corrections for FGK dwarf stars
Creators: name: Neilson, Hilding R.
name: Lester, John B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Limb darkening is a fundamental ingredient for interpreting observations of planetary transits, eclipsing binaries, optical/infrared interferometry and microlensing events. However, this modeling traditionally represents limb darkening by a simple law having one or two coefficients that have been derived from plane-parallel model stellar atmospheres, which has been done by many researchers. More recently, researchers have gone beyond plane-parallel models and considered other geometries. We previously studied the limb-darkening coefficients from spherically symmetric and plane-parallel model stellar atmospheres for cool giant and supergiant stars, and in this investigation we apply the same techniques to FGK dwarf stars. We present limb-darkening coefficients, gravity-darkening coefficients and interferometric angular diameter corrections from Atlas and SAtlas model stellar atmospheres. We find that sphericity is important even for dwarf model atmospheres, leading to significant differences in the predicted coefficients.
description: 9 pages, 8 figures. Accepted for publication in A&A
Improving the Reliability of Food Safety Disclosure: Restaurant Grading in Seattle and King County, Washington
Creators: name: Ashwood, Zoe C.
name: Elias, Becky
name: Ho, Daniel E.
Publisher: name: Stanford Digital Repository
Year: 2022
Subjects: subject: Food service--Safety measures
subject: Food industry and trade--Safety regulations
subject: Environmental health
subject: Restaurants
subject: Food adulteration and inspection
subject: Restaurant grading systems

description: The reliability of food safety inspection disclosures has long been questioned. Providing meaningful disclosures to consumers based on public data is a core challenge for environmental health. We present new results, based on retrospective data and a novel randomized peer review trial, to improve the reliability of the restaurant food safety grading system that was implemented in Seattle and King County, Washington, in 2017. To address critiques of inspections as driven by inspector differences and merely “snapshots-in-time,” we used data from multiple inspections and adjusted scores within each inspector area to isolate relative performance. We studied the geographic distribution, predictability, and reliability of this adjusted grading system.

Our ﬁndings are threefold. First, critical violations are much more reliably cited than non-critical violations, providing much more reliable inputs for grading. Second, and contrary to common belief, little evidence exists that repeat violations or the time trend of scores are associated with increased risk, hence providing no useful information for grading. Third, the adjusted system, based on quantile rankings of average critical points in up to four inspections, is much more robust to widespread inspector differences in stringency. Compared with conventional systems, this system reduces unwarranted geographic and intertemporal differences and improves predictive power. We provide easy-to-use, open-source statistical software for jurisdictions to implement this approach.
Nonlinear optics in Xe-filled hollow-core PCF in high pressure and supercritical regimes
Creators: name: Azhar, M.
name: Joly, N. Y.
name: Travers, J. C.
name: Russell, P. St. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Supercritical Xe at 293 K offers a Kerr nonlinearity that can exceed that of fused silica while being free of Raman scattering. It also has a much higher optical damage threshold and a transparency window that extends from the UV to the infrared. We report the observation of nonlinear phenomena, such as self-phase modulation, in hollow-core photonic crystal fiber filled with supercritical Xe. In the subcritical regime, intermodal four-wave-mixing resulted in the generation of UV light in the HE12 mode. The normal dispersion of the fiber at high pressures means that spectral broadening can clearly obtained without influence from soliton effects or material damage.
Recuerdos: Queer Central American Identity Formation in/through Photography
Creators: name: Calderon, Kevin
Publisher: name: Stanford Digital Repository
Year: 2022
Subjects: subject: Central Americans
subject: US-Central Americans
subject: Latinx
subject: Queer theory
subject: Queer phenomenology
subject: Queer Latinx
subject: Decoloniality
subject: Photographs
subject: visual studies
subject: queer photography
subject: queer central americans
subject: latinx photography
subject: Diaspora

description: What does it mean to be a Queer Central American? This photo exhibition is an elevation of my family’s personal photography as part of a transnational, intergenerational journey in/through Queerness. Being Central American is already fraught with colonial and imperial trauma; US imperialism and the dispossession of land from Campesinos, nation-states that employ a culture of fear and silencing to further their political projects, and a culture that centers religiosity with oftentimes anti-Queer/Trans sentiment/social structures. Put into conversation with my own photography of Queer Central Americans, I ask us to complicate our understandings of Diaspora, Family, and what it looks like to be Queer Central American today by applying Queer framework of orientation and using photography as a mode of analysis.