cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
China, India, Myanmar: Playing Rohingya Roulette
Creators: name: Taufiq, Hossain Ahmed
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: The 2017 crackdown on Rakhine Rohingyas by the Myanmar army (Tatmadaw) pushed more than 600,000 refugees into Bangladesh. Both Western and Islamic countries denounced Aung Sang Suu Kyis government, but both Asian giants, China and India, supported Myanmars actions. Both also have high stakes in Myanmar given their long-term geopolitics and geoeconomic South and Southeast Asian plans. In spite of Myanmar-based commonalities, Chinas and Indias approaches differ significantly, predicting equally dissimilar outcomes. This chapter examines their foreign policy and stakes in Myanmar in order to draw a sketch of the future of Rakhine Rohingyas stuck in Bangladesh.
Influence of Disorder Strength on Phase Field Models of Interfacial Growth
Creators: name: Laurila, T.
name: Pradas, M.
name: Hernandez-Machado, A.
name: Ala-Nissila, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the influence of disorder strength on the interface roughening process in a phase-field model with locally conserved dynamics. We consider two cases where the mobility coefficient multiplying the locally conserved current is either constant throughout the system (the two-sided model) or becomes zero in the phase into which the interface advances (one-sided model). In the limit of weak disorder, both models are completely equivalent and can reproduce the physical process of a fluid diffusively invading a porous media, where super-rough scaling of the interface fluctuations occurs. On the other hand, increasing disorder causes the scaling properties to change to intrinsic anomalous scaling. In the limit of strong disorder this behavior prevails for the one-sided model, whereas for the two-sided case, nucleation of domains in front of the invading front are observed.
description: Accepted for publication in PRE
การพัฒนาโปรแกรมฝึกทักษะการสอบภาษาอังกฤษ ALC
Creators: name: จิตติ สัมภัตตะกุล
Publisher: name: Southeast Bangkok College
Year: 2021
Subjects: โปรแกรมฝึกทักษะการสอบภาษาอังกฤษ
การประเมินคุณภาพของโปรแกรม
ความพึงพอใจ

description: วารสารวิชาการเซาธ์อีสท์บางกอก(สาขามนุษยศาสตร์และสังคมศาสตร์), 7, 1, 55 - 67
The NuMI Beam at FNAL and its use for Cross Section Measurements
Creators: name: Kopp, Sacha E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Neutrinos at the Main Injector (NuMI) facility at Fermilab began operations in late 2004. NuMI will deliver an intense muon neutrino beam of variable energy (2-20 GeV). Several aspects of the design and results from runs of the MINOS experiment are reviewed. I also discuss technique to measure directly the neutrino flux using a muon flux system at the end of the NuMI line.
description: contribution to the Fifth International Workshop on Neutrino-Nucleus Interactions in the Few-GeV Region (NuInt07), May 30 - June 2, 2007
Superionic silica-water and silica-hydrogen compounds under high pressure
Creators: name: Gao, Hao
name: Liu, Cong
name: Shi, Jiuyang
name: Pan, Shuning
name: Huang, Tianheng
name: Lu, Xiancai
name: Wang, Hui-Tian
name: Xing, Dingyu
name: Sun, Jian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Silica, water and hydrogen are known to be the major components of celestial bodies, and have significant influence on the formation and evolution of giant planets, such as Uranus and Neptune. Thus, it is of fundamental importance to investigate their states and possible reactions under the planetary conditions. Here, using advanced crystal structure searches and first-principles calculations in the Si-O-H system, we find that a silica-water compound (SiO2)2(H2O) and a silica-hydrogen compound SiO2H2 can exist under high pressures above 450 and 650 GPa, respectively. Further simulations reveal that, at high pressure and high temperature conditions corresponding to the interiors of Uranus and Neptune, these compounds exhibit superionic behavior, in which protons diffuse freely like liquid while the silicon and oxygen framework is fixed as solid. Therefore, these superionic silica-water and silica-hydrogen compounds could be regarded as important components of the deep mantle or core of giants, which also provides an alternative origin for their anomalous magnetic fields. These unexpected physical and chemical properties of the most common natural materials at high pressure offer key clues to understand some abstruse issues including demixing and erosion of the core in giant planets, and shed light on building reliable models for solar giants and exoplanets.
description: 13 pages, 4 figures
THE INFLUENCE OF NON-FINANCIAL, FINANCIAL AND CORPORATE GOVERNANCE FACTORS ON THE PRACTICE OF GLOBAL REPORTING INITIALTIVE (GRI) ENVIRONMENTAL DISCLOSURE
Creators: name: Benazir Mohamed Rafeek
Publisher: name: Southeast Bangkok College
Year: 2021
Subjects: Non-financial factors
Corporate governance
Global Reporting Initiative

description: วารสารวิชาการเซาธ์อีสท์บางกอก(สาขามนุษยศาสตร์และสังคมศาสตร์), 7, 1, 68 - 86
Load Factor Assessment of the Electric Grid by the Optimal Scheduling of Electrical Equipment- A MIQCP Model
Creators: Fernando V. Cerna
Mahdi Pourakbari-Kasmaei
Ehsan Naderi
Matti Lehtonen
and Javier Contreras
Publisher: name: IEEE
Year: 2021

This paper proposes a mixed-integer quadratically constrained programming model to deal with the load factor assessment problems in a modified power distribution system through optimal scheduling of electrical equipment.
In recent years, demand-side management (DSM) strategies have become an indispensable tool in the operation and planning of modern electricity grids (EGs). One effective way of ensuring the economical and reliable operation of an EG is through assessing its load factor (LF), while considering different types of electrical equipment (e.g., residential, commercial, and industrial). Toward this end, this paper proposes a mixed-integer quadratically constrained programming (MIQCP) model to deal with the LF assessment problems in a modified power distribution system through optimal scheduling of electrical equipment. This MIQCP model aims to minimize the total costs of purchasing energy by the electric utility via an iterative process, in which the difference between the energy consumption in each period and the average consumption is reduced. In the proposed model, the uncertainties in the consumption habits of different consumers, information related to each electrical equipment, energy prices, and the grid's technical constraints are considered. A modified 34-node EG, differentiated by consumer type, is implemented to evaluate the proposed model. Results show that the LF value is related to the optimal scheme of the electrical equipment that meets the operational and economic requirements of the power grid.
SPH simulations of turbulent flow in curved pipes with different geometries. A comparison with experiments
Creators: name: Alvarado-Rodriguez, C. E.
name: Sigalotti, L. Di G.
name: Klapp, J.
name: Fierro-Santillan, C. R.
name: Aragon, F.
name: Uribe-Ramirez, A. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The swirling secondary flow in curved pipes is studied in three-space dimensions using a weakly compressible Smoothed Particle Hydrodynamics (WCSPH) formulation coupled to new non-reflecting outflow boundary conditions. A large-eddy simulation (LES) model for turbulence is benchmarked with existing experimental data. After validation of the present model against experimental results for a 90 grades pipe bend, a detailed numerical study aimed at reproducing experimental flow measurements for a wide range of Reynolds numbers has been performed for different pipe geometries, including U pipe bends, S-shaped pipes and helically coiled pipes. In all cases, the SPH calculated behavior shows reasonably good agreement with the measurements across and downstream the bend in terms of streamwise velocity profiles and cross-sectional contours. Maximum mean-root-square deviations from the experimentally obtained profiles are always less than 1.8%. This combined with the very good matching between the SPH and the experimental cross-sectional contours shows the uprising capabilities of the present scheme for handling engineering applications with streamline curvature, such as flows in bends and manifolds.
description: 29 Pages, 24 Figures
Foraging ecology and nutrition of Stone’s sheep
Creators: name: Seip, Dale R.
Publisher: name: University of British Columbia
Year: 2010

description: This study compared the foraging behaviour and nutrition of Stone's sheep (Ovis dalli stonei) which had access to burned range to that of sheep on unburned range throughout the year. In winter, sheep were restricted to areas with less than 25-30 cm of snow. For most sheep this meant windswept, alpine ridges, but one small population used a burned, subalpine slope. Grazing pressure was high on these restricted winter ranges, particularly during a severe winter, resulting in removal j of all the forage from alpine range, and leaving only very poor quality forage on the subalpine range. The poor winter nutrition was reflected in low fecal nitrogen and DAPA levels and high Protostronqylus counts. In spring, sheep used either natural or fire-induced subalpine clearings to obtain early new plant growth. Forage quantity was much lower on unburned ranges, but biting rate and foraging time were the same as on burned ranges with high forage biomass. Quality of available forage and food intake were also similar. The foraging behaviour of Stone's sheep appeared to be similar to domestic sheep in that intake rate was primarily dependent on grass length rather than forage density. Sheep moved to higher elevations as the season progressed which provided them with access to the higher quality alpine forage. Regular use of mineral licks in summer apparently satisfied their sodium requirement. Grasses and sedges were the most important foods throughout the year although forbs and browse were important in the summer. Adult mortality rates were low. Lamb production was low following severe winters, presumably due to poor nutrition. An explanation for changes in lamb production based on density-dependent selective feeding was developed. Burned ranges were of limited value to Stone's sheep because they were usually unavailable as winter range, did not provide superior spring range and were not used in summer. Horn growth, however, appeared to be slightly better on burned ranges. A model of nutrient intake is developed to investigate the seasonal pattern of nutrition on burned and unburned ranges.
Kinematics of the H2O masers at the centre of the PN K3-35
Creators: name: Uscanga, L.
name: Gómez, Y.
name: Raga, A. C.
name: Cantó, J.
name: Anglada, G.
name: Gómez, J. F.
name: Torrelles, J. M.
name: Miranda, L. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have studied the kinematics traced by the water masers located at the centre of the planetary nebula (PN) K3-35, using data from previous Very Large Array (VLA) observations. An analysis of the spatial distribution and line-of-sight velocities of the maser spots allows us to identify typical patterns of a rotating and expanding ring in the position-velocity diagrams, according to our kinematical model. We find that the distribution of the masers is compatible with tracing a circular ring with a ~0.021 arcsec (~100 AU) radius, observed with an inclination angle with respect to the line of sight of 55 degrees. We derive expansion and rotation velocities of 1.4 and 3.1 km/s, respectively. The orientation of the ring projected on the plane of the sky, at PA 158 degrees, is almost orthogonal to the direction of the innermost region of the jet observed in K3-35, suggesting the presence of a disc or torus that may be related to the collimation of the outflow.
description: 7 pages, 4 figures, 2 tables. Accepted by MNRAS
ลักษณะการดำเนินธุรกิจของเดย์สปาและโฮเทลแอนด์รีสอร์ทสปาไทยและต่างประเทศ : การทบทวนวรรณกรรม
Creators: name: ปิยะวิทย์ ทิพรส
Publisher: name: Southeast Bangkok College
Year: 2021
Subjects: เดย์สปา
โฮเทลแอนด์รีสอร์ทสปา
ลักษณะการดำเนินธุรกิจ

description: วารสารวิชาการเซาธ์อีสท์บางกอก(สาขามนุษยศาสตร์และสังคมศาสตร์), 7, 1, 87 - 99
ประเทศไทยกับความพร้อมในการเป็นศูนย์กลางการท่องเที่ยวเพื่อเป็นรางวัล
Creators: name: เบญจมาภรณ์ ชำนาญฉา
Publisher: name: Southeast Bangkok College
Year: 2021
Subjects: การท่องเที่ยวเพื่อเป็นรางวัล
ศักยภาพ
ความพร้อม
การเป็นศูนย์กลาง

description: วารสารวิชาการเซาธ์อีสท์บางกอก(สาขามนุษยศาสตร์และสังคมศาสตร์), 7, 1, 100 - 114
Ball-and-stick models of the hexane molecule
Creators: name: Chen, Junjie
Publisher: name: figshare
Year: 2022
Subjects: subject: Computational Chemistry
subject: Crystallography
subject: 30301 Chemical Characterisation of Materials
subject: FOS: Chemical sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: 30606 Structural Chemistry and Spectroscopy
subject: 30307 Theory and Design of Materials

description: Hexane is an organic compound, a straight-chain alkane with six carbon atoms. It is widely used as a cheap, relatively safe, largely unreactive, and easily evaporated non-polar solvent. In industry, hexanes are used in the formulation of glues for shoes, leather products, and roofing. Hexanes are commonly used in chromatography as a non-polar solvent. Higher alkanes present as impurities in hexanes have similar retention times as the solvent, meaning that fractions containing hexane will also contain these impurities. In preparative chromatography, concentration of a large volume of hexanes can result in a sample that is appreciably contaminated by alkanes. Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China
Overview of event-by-event analysis of high energy nuclear collisions
Creators: name: Nayak, Tapan K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The event-by-event analysis of high energy nuclear collisions aims at revealing the richness of the underlying event structures and provide unique measures of dynamical fluctuations associated with QGP phase transition. The major challenge in these studies is to separate the dynamical fluctuations from the many other sources which contribute to the measured values. We present the fluctuations in terms of event multiplicity, mean transverse momentum, elliptic flow, source sizes, particle ratios and net charge distributions. In addition, we discuss the effect of long range correlations, disoriented chiral condensates and presence of jets. A brief review of various probes used for fluctuation studies and available experimental results are presented.
description: Invited talk at the "XIth International Workshop on Correlation and Fluctuation in Multiparticle Production", Nov 21-24, 2006, Hangzhou, China (19 pages)
A Shape-Based Clustering Framework for Time Aggregation in the Presence of Variable Generation and Energy Storage
Creators: Nima Sarajpoor
Logan Rakai
Juan Arteaga
and Hamidreza Zareipour
Publisher: name: IEEE
Year: 2021

This paper proposes a new time aggregation framework to incorporate a shape-based distance to jointly extract representative periods of wind and demand data.
A common solution to mitigate the complexity of power system studies is time aggregation. This is to replace the actual data set for all time intervals with representative time periods. Previous research confirms that when energy storage systems are involved in the study, preserving the overall shape of the original data is crucial. This paper proposes a new time aggregation framework to incorporate a shape-based distance to jointly extract representative periods of wind and demand data. The duration curve of the net demand is used as a data-based validation index to compare the performance of the proposed method against other techniques. Also, a 3-bus case study that includes a wind resource, an energy storage system, and two conventional generators is designed. Four model-based validation indices are defined and applied for performance measurement, including the annual operation cost of the system, the annual wind curtailment in the system, the energy throughput of the storage facility, and the daily average of the state of the charge of the energy storage for each 365 days of the year.
Modeling and Performance Evaluation of Grid-Interactive Efficient Buildings (GEB) in a Microgrid Environment
Creators: Saifur Rahman
Ashraful Haque
and Zejia Jing
Publisher: name: IEEE
Year: 2021

A detailed analysis of how Grid-interactive Efficient Buildings can participate as active elements in a microgrid through on-site PV electricity generation and energy efficiency applications is presented.
A detailed analysis of how Grid-interactive Efficient Buildings (GEB) can participate as active elements in a microgrid through on-site PV electricity generation and energy efficiency applications is presented. A case study using three US Department of Energy (DoE)-developed prototype commercial building models are used. These represent a secondary school, a hospital and a large office building. Simulation results show that when schools, hospitals and office buildings are operated as GEBs, there are always electricity savings, but savings amounts vary depending on levels of HVAC and lighting controls within the limits of customer comfort levels. These comfort level ranges are determined through interactions with building occupants which resulted in ΔT of 2-5°F and dimming level range of 20% to 50%. Savings in the school building are so much higher for two reasons. One, because without GEB application these buildings are operated in a business-as-usual fashion throughout the year, even when the school is not in session. The second reason is — being a two-story building the roof area is comparatively much higher than the hospital or the multi-storied office buildings.
A Multi-Site Networked Hardware-in-the-Loop Platform for Evaluation of Interoperability and Distributed Intelligence at Grid-Edge
Creators: Somasundaram Essakiappan
Prithwiraj Roy Chowdhury
Kevin P. Schneider
Stuart Laval
Kumaraguru Prabakar
Madhav D. Manjrekar
Yaswanth Nag Velaga
Neil Shepard
Joshua Hambrick
and Ben Ollis
Publisher: name: IEEE
Year: 2021

Presented in this paper, is the development of a multi-site evaluation platform that employs Advanced Distribution Management Systems, distributed control devices, real-time hardware-in-the-loop assets, secure communication links, and protocol adapters.
Electric power systems have experienced large increases in the number of intelligent, connected and controllable devices being deployed, leading to a high degree of distributed intelligence at the grid-edge. These devices, both utility-owned and consumer-owned, include renewable generation, energy storage, remote switches, voltage regulators, and smart controllable loads. These new devices provide significant potential for increased operational flexibility that can be leveraged to achieve system reconfiguration, resiliency improvements, power quality improvements, and distribution system automation. However, two significant challenges must be addressed before these assets can be leveraged for operations: interoperability and system level validation prior to deployment. Because of the complexity of distributed control systems, and their interactions with legacy centralized controls, a purely simulations-based approach for pre-deployment validation is not sufficient. It requires hardware-in-the-loop (HIL) testing to emulate hardware devices and evaluate their performance. Additionally, securely integrating multiple test facilities at utility operators and vendors can enable the rapid scale-up of evaluation platforms and remove the need for multiple expensive standalone installations. Presented in this paper, is the development of a multi-site evaluation platform that employs Advanced Distribution Management Systems (ADMS), distributed control devices, real-time HIL assets, secure communication links, and protocol adapters. The testbed has been developed at three sites, with one site hosting the ADMS and the other two hosting HIL capabilities. This platform uses standards-based approaches and open-source tools, and hence can serve as a template for other researchers and institutions to implement their multi-site evaluation frameworks for pre-deployment testing.
A New Approach to the Fault Location Problem: Using the Fault''s Transient Intermediate Frequency Response
Creators: Nicolás Cifuentes and Bikash C. Pal
Publisher: name: IEEE
Year: 2021

This paper proposes a new fault location method based on the fault's transient intermediate frequency response of the system immediately after a fault occurs.
The fault location problem has been tackled mainly through impedance-based techniques, the travelling wave principle and more recently machine learning algorithms. These techniques require both current and voltage measurement. In the case of impedance-based methods they can provide multiples solutions. In the case of the travelling wave approach it usually requires high sampling frequency measurements together with sophisticated identification algorithms. Machine learning techniques require training data and re-tuning for different grid topologies. This paper proposes a new fault location method based on the fault's transient intermediate frequency response of the system immediately after a fault occurs. The transient response is characterized by the travelling wave phenomenon together with intermediate frequencies of oscillation, which are dependent on the faulted section and the fault location. In the proposed fault location solution, an offline methodology identifies these intermediate frequencies and their dependency on the fault location is fitted using a polynomial regression. The online fault location is performed using those polynomial regressions together with voltage measurements from the system and simple signal processing techniques. The full method is tested with an EMT simulation in PSCAD, using the exact frequency dependent model for underground cables.
On the Angular Momentum Extraction from the Rotation Powered Pulsars
Creators: name: Shibata, Shinpei
name: Kisaka, Shota
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The rotation powered pulsar loses angular momentum at a rate of the rotation power divided by the angular velocity $Ω_*$. This means that the length of the lever arm of the angular momentum extracted by the photons, relativistic particles and wind must be on average $c/Ω_*$, which is known as the light cylinder radius. Therefore, any deposition of the rotation power within the light cylinder causes insufficient loss of angular momentum. In this paper, we investigate two cases of this type of energy release: polar cap acceleration and Ohmic heating in the magnetospheric current inside the star. As for the first case, the outer magnetosphere beyond the light cylinder is found to compensate the insufficient loss of the angular momentum. We argue that the energy flux coming from the sub-rotating magnetic field lines must be larger than the solid-angle average value, and as a result, an enhanced energy flux emanating beyond the light cylinder is observed in different phases in the light curve from those of emission inside the light cylinder. As for the second case, the stellar surface rotates more slowly than the stellar interior. We find that the way the magnetospheric current closes inside the star is linked to how the angular momentum is transferred inside the star. We obtain numerical solutions which show that the magnetospheric current inside the star spreads over the polar cap magnetic flux embedded in the star in such a way that electromotive force is gained efficiently.
description: Accepted for publication in MNRAS, 9 pages, 16 figures
Compulsory Deep Mixing of 3He and CNO Isotopes in the Envelopes of low-mass Red Giants
Creators: name: Eggleton, Peter P.
name: Dearborn, David S. P.
name: Lattanzio, John C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Three-dimensional stellar modeling has enabled us to identify a deep-mixing mechanism that must operate in all low mass giants. This mixing process is not optional, and is driven by a molecular weight inversion created by the 3He(3He,2p)4He reaction. In this paper we characterize the behavior of this mixing, and study its impact on the envelope abundances. It not only eliminates the problem of 3He overproduction, reconciling stellar and big bang nucleosynthesis with observations, but solves the discrepancy between observed and calculated CNO isotope ratios in low mass giants, a problem of more than 3 decades' standing. This mixing mechanism, which we call `$δμ$-mixing', operates rapidly (relative to the nuclear timescale of overall evolution, ~ 10^8 yrs) once the hydrogen burning shell approaches the material homogenized by the surface convection zone. In agreement with observations, Pop I stars between 0.8 and 2.0$\Msun$ develop 12C/13C ratios of 14.5 +/- 1.5, while Pop II stars process the carbon to ratios of 4.0 +/- 0.5. In stars less than 1.25$\Msun$, this mechanism also destroys 90% to 95% of the 3He produced on the main sequence.
description: Final accepted version (submitted to Astrophys J in Jan 2007...)
Assessment of the Effects of the Electromagnetic Pulse on the Response of Overhead Distribution Lines to Direct Lightning Strikes
Creators: Alberto Borghetti
Kazuyuki Ishimoto
Fabio Napolitano
Carlo Alberto Nucci
and Fabio Tossani
Publisher: name: IEEE
Year: 2021

Motivated by recent results obtained for the case of a medium voltage line configuration with a shield wire, this paper extends the analysis to assess the contribution of the lightning electromagnetic pulse on the lightning performance of an overhead distribution line with and without periodically grounded wires and surge arresters.
In the usual practice, the evaluation of overvoltages due to direct lightning strikes to overhead power lines is focused on the representation of the effects of the lightning current injection, whilst the effects of the coupling between the conductors and the lightning electromagnetic pulse (LEMP) is disregarded. Motivated by recent results obtained for the case of a medium voltage line configuration with a shield wire, this paper extends the analysis to assess the contribution of the LEMP on the lightning performance of an overhead distribution line with and without periodically grounded wires and surge arresters. Moreover, the paper deals with the LEMP effect on the occurrence probability of flashovers on different phases, which is an important information on the service continuity of networks with isolated or compensated neutral earthing. A validation of the results is obtained by comparing the overvoltages calculated by the electromagnetic transient program including the model of the line illuminated by the LEMP and those obtained by a three-dimensional finite difference time-domain approach.
Experimental manifestation of the breakpoint region in the current-voltage characteristics of intrinsic Josephson junctions
Creators: name: Irie, A.
name: Shukrinov, Yu. M.
name: Oya, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The experimental evidence of the breakpoint on the current-voltage characteristics (IVCs) of the stacks of intrinsic Josephson junctions (IJJs) is presented. The influence of the capacitive coupling on the IVCs of Bi$_2$Sr$_2$CaCu$_2$O$_y$ IJJs has been investigated. At 4.2 K, clear breakpoint region is observed on the branches in the IVCs. It is found that the hysteresis observed on the IVC is suppressed due to the coupling compared with that expected from the McCumber parameter. Measurements agree well with the results obtained by the theoretical model.
description: 3 pages, 4 figures
On the Descent Algebra of Type $D$
Creators: name: Bergeron, N.
name: van Willigenburg, S. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 20F32

description: Here we give a combinatorial interpretation of Solomon's rule for multiplication in the descent algebra of Weyl groups of type $D$, $ΣD_n$. From here we show that $ΣD_n$ is a homomorphic image of the descent algebra of the hyperoctahedral group, $ΣB_{n-2}$.
description: 7 pages
Formation Scenario for Wide and Close Binary Systems
Creators: name: Machida, Masahiro N.
name: Tomisaka, Kohji
name: Matsumoto, Tomoaki
name: Inutsuka, Shu-ichiro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Fragmentation and binary formation processes are studied using three-dimensional resistive MHD nested grid simulations. Starting with a Bonnor-Ebert isothermal cloud rotating in a uniform magnetic field, we calculate the cloud evolution from the molecular cloud core (n=10^4 cm^-3) to the stellar core (n \simeq 10^22 cm^-3). We calculated 147 models with different initial magnetic, rotational, and thermal energies, and the amplitudes of the non-axisymmetric perturbation. In a collapsing cloud, fragmentation is mainly controlled by the initial ratio of the rotational to the magnetic energy, regardless of the initial thermal energy and amplitude of the non-axisymmetric perturbation. When the clouds have large rotational energies in relation to magnetic energies, fragmentation occurs in the low-density evolution phase (10^12 cm^-3 < n < 10^15 cm^-3) with separations of 3-300 AU. Fragments that appeared in this phase are expected to evolve into wide binary systems. On the other hand, fragmentation does not occur in the low-density evolution phase, when initial clouds have large magnetic energies in relation to the rotational energies. In these clouds, fragmentation only occurs in the high-density evolution phase (n > 10^17 cm^-3) after the clouds experience significant reduction of the magnetic field owing to Ohmic dissipation in the period of 10^12 cm^-3 < n < 10^15 cm^-3. Fragments appearing in this phase have separations of < 0.3 AU, and are expected to evolve into close binary systems. As a result, we found two typical fragmentation epochs, which cause different stellar separations. Although these typical separations are disturbed in the subsequent gas accretion phase, we might be able to observe two peaks of binary separations in extremely young stellar groups.
description: 45 pages,12 figures, Submitted to ApJ, For high resolution figures see http://www2.scphys.kyoto-u.ac.jp/~machidam/protostar/proto/main-astroph.pdf
Features of the Polynomial Biplot for Ordered Contingency Tables
Creators: name: Beh, Eric J.
name: Lombardo, Rosaria
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: For more than 20 years, variants of correspondence analysis have arisen that accommodate for the structure of ordered categorical variables using orthogonal polynomials. When the visual display from this analysis is the biplot, projections linking the origin to the standard coordinate of each category is a common feature. In the case when a column variable, say, consists of ordered categories, the biplot can be constructed so that their standard coordinate is determined using orthogonal polynomials which require a set of a priori scores that reflect the ordered structure of the categories. When the first two polynomials are used to construct the biplot they produce a configuration of standard coordinates that appear to be parabolic in shape. This article verifies the exact nature of this parabolic relationship and examines the various features of this configuration of points. Particular emphasis is given to the focus, vertex, intercepts and directrix of this relationship and we also briefly examine the impact of choosing different a priori scores on these features. The R function, parabola.exe(), used to perform these calculates is included as supplementary material to this article. Supplementary files for this article are available online.
Machine learning identification of symmetrized base states of Rydberg atoms
Creators: name: Chong, Daryl Ryan
name: Kim, Minhyuk
name: Ahn, Jaewook
name: Jeong, Heejeong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Studying the complex quantum dynamics of interacting many-body systems is one of the most challenging areas in modern physics. Here, we use machine learning (ML) models to identify the symmetrized base states of interacting Rydberg atoms of various atom numbers (up to six) and geometric configurations. To obtain the data set for training the ML classifiers, we generate Rydberg excitation probability profiles that simulate experimental data by utilizing Lindblad equations that incorporate laser intensities and phase noise. Then, we classify the data sets using support vector machines (SVMs) and random forest classifiers (RFCs). With these ML models, we achieve high accuracy of up to 100% for data sets containing only a few hundred samples, especially for the closed atom configurations such as the pentagonal (five atoms) and hexagonal (six atoms) systems. The results demonstrate that computationally cost-effective ML models can be used in the identification of Rydberg atom configurations.
description: 18 pages, 15 figures
New composite models of partially ionized protoplanetary disks
Creators: name: Terquem, Caroline E. J. M. L. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study an accretion disk in which three different regions may coexist: MHD turbulent regions, dead zones and gravitationally unstable regions. Although the dead zones are stable, there is some transport due to the Reynolds stress associated with waves emitted from the turbulent layers. We model the transport in each of the different regions by its own $α$ parameter, this being 10 to $10^{3}$ times smaller in dead zones than in active layers. In gravitationally unstable regions, $α$ is determined by the fact that the disk self-adjusts to a state of marginal stability. We construct steady-state models of such disks. We find that for uniform mass flow, the disk has to be more massive, hotter and thicker at the radii where there is a dead zone. In disks in which the dead zone is very massive, gravitational instabilities are present. Whether such models are realistic or not depends on whether hydrodynamical fluctuations driven by the turbulent layers can penetrate all the way inside the dead zone. This may be more easily achieved when the ratio of the mass of the active layer to that of the dead zone is relatively large, which in our models corresponds to $α$ in the dead zone being about 10% of $α$ in the active layers. If the disk is at some stage of its evolution not in steady-state, then the surface density will evolve toward the steady-state solution. However, if $α$ in the dead zone is much smaller than in the active zone, the timescale for the parts of the disk beyond a few AU to reach steady-state may become longer than the disk lifetime. Steady-state disks with dead zones are a more favorable environment for planet formation than standard disks, since the dead zone is typically 10 times more massive than a corresponding turbulent zone at the same location.
description: 13 pages, 5 figures, accepted for publication in ApJ
Space-filling models of the hexane molecule
Creators: name: Chen, Junjie
Publisher: name: figshare
Year: 2022
Subjects: subject: Computational Chemistry
subject: Crystallography
subject: 30301 Chemical Characterisation of Materials
subject: FOS: Chemical sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: 30606 Structural Chemistry and Spectroscopy
subject: 30307 Theory and Design of Materials

description: All alkanes are colorless. The boiling points of the various hexanes are somewhat similar and, as for other alkanes, are generally lower for the more branched forms. The melting points are quite different and the trend is not apparent. Like most alkanes, hexane characteristically exhibits low reactivity and are suitable solvents for reactive compounds. Commercial samples of n-hexane however often contain methylcyclopentane, which features tertiary carbon-hydrogen bonds, which are incompatible with some radical reactions. Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China
Program evaluation in context : models of negotiated knowledge production and use
Creators: name: Levitan, Alberta Potter
Publisher: name: University of British Columbia
Year: 2010

description: Recent growth and co-optation of social reform programs into the structure of the State, and parallel development of public policymaking, have precipitated closer linkages between social research and the policy intervention process. Program evaluation refers to a variety of descriptive and analytical studies of program process and/or program impact. Two models of program evaluation research are relied upon in design and implementation of evaluation studies: (l) a conventional model derived from a positivist paradigm of social research and (2) an alternative model evolved from an interpretive paradigm. Critical review of these models suggests their complementarity for comprehensive evaluation studies, but emphasizes the extent to which they minimize the significance of larger political/ economic context of program development in shaping evaluation processes. The purpose of this dissertation has been to develop a wider selection of evaluation research models which specifically take into account construction of the research "product" and characteristics of the larger structural context in which such products are designed to be used. The theoretical strategy relies on aspects of Strauss' negotiated order paradigm and approaches to policy research taken by Rein and Wiseman, and involves an effort to relate more stable structural characteristics of the social, political, economic and organizational context of reform programs to a series of six basic areas of negotiation in the evaluation process. These include: (l) delineation of major actors; (2) organizational placement of program evaluation work; (3) choice of general research strategy; (k) selection of appropriate research model and methodology; (5) construction and content of research reports; and (6) planning for research utilization. This framework provided the theoretical perspective for description and analysis of four case studies: two in housing policy, one in private social service delivery and one in delivery of legal education services. Conclusions from case studies, and other research suggested four models of negotiated knowledge. New models include elements of positivist and interpretive models but are designed around the structural context of program planning and implementation and focus directly on the six basic areas of negotiation. This expanded repertoire of models of negotiated knowledge production and use have been labelled Experimental, Managerial, Collaborative, and Transformative.
Vacuum and semiclassical gravity: a difficulty and its bewildering significance
Creators: name: Ansoldi, Stefano
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review a long-standing difficulty in some semiclassical models of vacuum and vacuum decay. Surprisingly enough these models, careless of their transparent formulation, are affected by, both, technical and conceptual issues. After proving some general results that are relevant for, both, the Euclidean and Lorentzian sectors of their dynamics, we briefly highlight their importance in connection with the issues discussed before, arguing that their solution might be interesting in our quest for quantum gravity.
description: 11 pages, LaTeX, 4 figure; talk given at the workshop "From Quantum to Emergent Gravity: Theory and Phenomenology", June, 11-15 2007, Trieste, Italy (http://www.sissa.it/app/QGconference); submitted to the "Proceedings of Science" (http://pos.sissa.it)
Morphological Dependence of MIR Properties of SDSS Galaxies in the Spitzer SWIRE Survey
Creators: name: Li, Haining
name: Wu, Hong
name: Cao, Chen
name: Zhu, Yinan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the correlation between morphological types and mid-infrared (MIR) properties of an optically flux-limited sample of 154 galaxies from the Forth Data Release (DR4) of Sloan Digital Sky Survey (SDSS), cross-correlated with Spitzer SWIRE (Spitzer Wide-Area InfraRed Extragalactic Survey) fields of ELAIS-N1, ELAIS-N2 and Lockman Hole. Aperture photometry is performed on the SDSS and Spitzer images to obtain optical and MIR properties. The morphological classifications are given based on both visual inspection and bulge-disk decomposition on SDSS g- and r-band images. The average bulge-to-total ratio (B/T) is a smooth function over different morphological types. Both the 8um(dust) and 24um(dust) luminosities and their relative luminosity ratios to 3.6um (MIR dust-to-star ratios) present obvious correlations with both the Hubble T-type and B/T. The early-type galaxies notably differ from the late-types in the MIR properties, especially in the MIR dust-to-star ratios. It is suggested that the MIR dust-to-star ratio is an effective way to separate the early-type galaxies from the late-type ones. Based on the tight correlation between the stellar mass and the 3.6um luminosity, we have derived a formula to calculate the stellar mass from the latter. We have also investigated the MIR properties of both edge-on galaxies and barred galaxies in our sample. Since they present similar MIR properties to the other sample galaxies, they do not influence the MIR properties obtained for the entire sample.
description: Accepted for publication by AJ. 18 pages, 14 figures, and 4 tables
Using video consultation technology between care homes and health and social care professionals: interview study during COVID-19 pandemic
Creators: name: Warmoth, Krystal
name: Lynch, Jennifer
name: Darlington, Nicole
name: Bunn, Frances
name: Goodman, Claire
Publisher: name: University of Hertfordshire
Year: 2021

description: Using video consultation technology between care homes and health and social care professionals: a scoping review and interview study during COVID-19 pandemic
A 51.3 TOPS/W, 134.4 GOPS In-memory Binary Image Filtering in 65nm CMOS
Creators: name: Bose, Sumon Kumar
name: Singla, Deepak
name: Basu, Arindam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Hardware Architecture (cs.AR)
subject: Emerging Technologies (cs.ET)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Neuromorphic vision sensors (NVS) can enable energy savings due to their event-driven that exploits the temporal redundancy in video streams from a stationary camera. However, noise-driven events lead to the false triggering of the object recognition processor. Image denoise operations require memoryintensive processing leading to a bottleneck in energy and latency. In this paper, we present in-memory filtering (IMF), a 6TSRAM in-memory computing based image denoising for eventbased binary image (EBBI) frame from an NVS. We propose a non-overlap median filter (NOMF) for image denoising. An inmemory computing framework enables hardware implementation of NOMF leveraging the inherent read disturb phenomenon of 6T-SRAM. To demonstrate the energy-saving and effectiveness of the algorithm, we fabricated the proposed architecture in a 65nm CMOS process. As compared to fully digital implementation, IMF enables > 70x energy savings and a > 3x improvement of processing time when tested with the video recordings from a DAVIS sensor and achieves a peak throughput of 134.4 GOPS. Furthermore, the peak energy efficiencies of the NOMF is 51.3 TOPS/W, comparable with state of the art inmemory processors. We also show that the accuracy of the images obtained by NOMF provide comparable accuracy in tracking and classification applications when compared with images obtained by conventional median filtering.
description: 13 pages
Inference for the dark energy equation of state using Type IA supernova data
Creators: name: Genovese, Christopher
name: Freeman, Peter
name: Wasserman, Larry
name: Nichol, Robert
name: Miller, Christopher
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The surprising discovery of an accelerating universe led cosmologists to posit the existence of "dark energy"--a mysterious energy field that permeates the universe. Understanding dark energy has become the central problem of modern cosmology. After describing the scientific background in depth, we formulate the task as a nonlinear inverse problem that expresses the comoving distance function in terms of the dark-energy equation of state. We present two classes of methods for making sharp statistical inferences about the equation of state from observations of Type Ia Supernovae (SNe). First, we derive a technique for testing hypotheses about the equation of state that requires no assumptions about its form and can distinguish among competing theories. Second, we present a framework for computing parametric and nonparametric estimators of the equation of state, with an associated assessment of uncertainty. Using our approach, we evaluate the strength of statistical evidence for various competing models of dark energy. Consistent with current studies, we find that with the available Type Ia SNe data, it is not possible to distinguish statistically among popular dark-energy models, and that, in particular, there is no support in the data for rejecting a cosmological constant. With much more supernova data likely to be available in coming years (e.g., from the DOE/NASA Joint Dark Energy Mission), we address the more interesting question of whether future data sets will have sufficient resolution to distinguish among competing theories.
description: Published in at http://dx.doi.org/10.1214/08-AOAS229 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)