cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generation Symmetry and E_6 Unification
Creators: name: Stech, Berthold
name: Tavartkiladze, Zurab
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The group E_6 for grand unification is combined with the generation symmetry group SO(3)_g. The coupling matrices in the Yukawa interaction are identified with the vacuum expectation values of scalar fields which are representations of the generation symmetry. These values determine the hierarchy of the fermions as well as their mixings and CP-violation. This generation mixing appears in conjunction with the mixing of the standard model fermions with the heavy fermions present in the lowest representation of E_6. A close connection between charged and neutral fermions is observed relating for instance the CKM mixings with the mass splittings of the light neutrinos. Numerical fits with only few parameters reproduce quantitatively all known fermion properties. The model predicts an inverted neutrino hierarchy and gives rather strict values for the light and heavy neutrino masses as well as for the 0ν2βdecay parameter. It also predicts that the masses of the two lightest of six `right handed' neutrinos lie in the low TeV region.
description: RevTex, typos corrected, refs. added. To appear in Phys Rev D
Soret effects on unsteady  magnetohydrodynamic  mixed-convection  heat-and-mass-transfer flow in a porous medium with Newtonian heating
Creators: name: Mohd Z. Salleh
name: Hussanan, Abid
name: Khan, Ilyas
name: Razman M. Tahar
name: Zulkhibri Ismail
Publisher: name: Maejo University
Year: 2015
Subjects: Soret effects,magnetohydrodynamic flow,heat-and-mass-transfer flow,porous medium,Newtonian heating

description: 2, 9, Maejo International Journal of Science and Technology
Community structure and ethnic preferences in school friendship networks
Creators: name: Gonzalez, M. C.
name: Herrmann, H. J.
name: Kertesz, J.
name: Vicsek, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Recently developed concepts and techniques of analyzing complex systems provide new insight into the structure of social networks. Uncovering recurrent preferences and organizational principles in such networks is a key issue to characterize them. We investigate school friendship networks from the Add Health database. Applying threshold analysis, we find that the friendship networks do not form a single connected component through mutual strong nominations within a school, while under weaker conditions such interconnectedness is present. We extract the networks of overlapping communities at the schools (c-networks) and find that they are scale free and disassortative in contrast to the direct friendship networks, which have an exponential degree distribution and are assortative. Based on the network analysis we study the ethnic preferences in friendship selection. The clique percolation method we use reveals that when in minority, the students tend to build more densely interconnected groups of friends. We also find an asymmetry in the behavior of black minorities in a white majority as compared to that of white minorities in a black majority.
description: submitted to Physica A
The effects of the tip clearance on the performance of small-scale turbopumps for ORC applications;analysis and modeling
Creators: name: Zakeralhoseini, Sajjad
name: Schiffmann, Jürg
Publisher: name: Technical University of Munich
Year: 2021
Subjects: ORC; Turbopumps; CFD; Slip factor; Head rise; 1D modeling

description: In this paper, the influence of tip clearance on the performance of small-scale turbopumps is studied numerically on extensive parameter ranges suitable for organic Rankine cycle applications. A novel and fully parameterized design model is developed and used to generate a wide range of turbopumps and their fluid domains to carry out three-dimensional computations across the impeller stage. Impellers are investigated at different operating conditions and the accomplished results are analyzed to characterize the performance at design and off-design conditions. The CFD calculations demonstrate that the slip factor is dependent not only on its geometrical parameters as considered by most correlations but also on its operating conditions. The slip factor decreased almost linearly as the flow rate increased. In addition, the tip clearance ratio influences the slip factor and its influence is non-linear. The head rise decreases as the tip clearance ratios increased, however, for radial impellers, the higher head rise was observed for small tip clearance ratios (
Rapid Spectral Variability of a Giant Flare from a Magnetar in NGC 253
Creators: name: Roberts, O. J.
name: Veres, P.
name: Baring, M. G.
name: Briggs, M. S.
name: Kouveliotou, C.
name: Bissaldi, E.
name: Younes, G.
name: Chastain, S. I.
name: DeLaunay, J. J.
name: Huppenkothen, D.
name: Tohuvavohu, A.
name: Bhat, P. N.
name: Gogus, E.
name: van der Horst, A. J.
name: Kennea, J. A.
name: Kocevski, D.
name: Linford, J. D.
name: Guiriec, S.
name: Hamburg, R.
name: Wilson-Hodge, C. A.
name: Burns, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Magnetars are slowly-rotating neutron stars with extremely strong magnetic fields ($10^{13-15}$ G), episodically emitting $\sim100$ ms long X-ray bursts with energies of $\sim10^{40-41}$ erg. Rarely, they produce extremely bright, energetic giant flares that begin with a short ($\sim0.2$ s), intense flash, followed by fainter, longer lasting emission modulated by the magnetar spin period (typically 2-12 s), thus confirming their origin. Over the last 40 years, only three such flares have been observed in our local group; they all suffered from instrumental saturation due to their extreme intensity. It has been proposed that extra-galactic giant flares likely constitute a subset of short gamma-ray bursts, noting that the sensitivity of current instrumentation prevents us from detecting the pulsating tail, while the initial bright flash is readily observable out to distances $\sim 10-20$ Mpc. Here, we report X- and gamma-ray observations of GRB 200415A, which exhibits a rapid onset, very fast time variability, flat spectra and significant sub-millisecond spectral evolution. These attributes match well with those expected for a giant flare from an extra-galactic magnetar, noting that GRB 200415A is directionally associated with the galaxy NGC 253 ($\sim$3.5 Mpc away). The detection of $\sim3$ MeV photons provides definitive evidence for relativistic motion of the emitting plasma. The observed rapid spectral evolution can naturally be generated by radiation emanating from such rapidly-moving gas in a rotating magnetar.
title: Hypoplastic Left Heart Syndrome (HLHS)
Creators: name: Khandelwal, Mohit
Publisher: name: EURORAD
Year: 2021
Subjects: subject: Cardiovascular
subject: Arteries / Aorta
subject: Cardiac
subject: Cardiovascular system
subject: CT
subject: CT-Angiography
subject: Surgery
subject: Congenital
subject: Clinical Cases

description: Clinical History: 6-day old male neonate presented with cyanosis within 24 hr of birth, respiratory distress, irritability, poor feeding. Examination revealed tachypnea, tachycardia, crepts in bilateral lungs, abnormal cardiac auscultation. -

description: 7 days, male
Dynamical masses of brightest cluster galaxies II: constraints on the stellar IMF
Creators: name: Loubser, S. I.
name: Hoekstra, H.
name: Babul, A.
name: Bahé, Y. M.
name: Donahue, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use stellar and dynamical mass profiles, combined with a stellar population analysis, of 32 brightest cluster galaxies (BCGs) at redshifts of 0.05 $\leq z \leq$ 0.30, to place constraints on their stellar Initial Mass Function (IMF). We measure the spatially-resolved stellar population properties of the BCGs, and use it to derive their stellar mass-to-light ratios ($Υ_{\star \rm POP}$). We find young stellar populations ($
description: 15 pages, 11 figures, accepted for publication in MNRAS
An analogue of Eulerian polynomials related to  L-type function
Creators: name: Araci, Serkan
name: Acikgoz, Mehmet
name: Corcino, Roberto B.
name: Cenap ?Zel
Publisher: name: Maejo University
Year: 2015
Subjects: p-adic fermionic q-integral on Zp,Eulerian polynomials,contour integral,L-function,Dirichlet character

description: 2, 9, Maejo International Journal of Science and Technology
Colloidal Synthesis of Crystalline Aluminum Nanoparticles for UV Plasmonics
Creators: name: Castilla, Marion
name: Schuermans, Silvère
name: Gérard, Davy
name: Martin, Jérôme
name: Maurer, Thomas
name: Hananel, Uri
name: Markovich, Gil
name: Plain, Jérôme
name: Proust, Julien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Numerous applications of nanotechnologies rely on the wide availability of high-quality crystalline nanoparticles (NPs). Although the chemical synthesis of noble metal nanoparticles (gold and silver) is well mastered, pushing the optical response of metallic nanoparticles towards the ultraviolet requires other materials, such as aluminum. Although a few demonstrations of chemical synthesis of Al nanoparticles have been reported so far, an elaboration path allowing for a wide range of NP size that is compatible with mass production has yet to be demonstrated. In this article, we report on the production of spherical, size-controlled crystalline Al NPs starting from commercial Al foils and without the use of a catalyst. The proposed method combines sonochemistry with solvochemistry and is fully up-scalable. The obtained NPs have a 10-100 nm crystalline Al core surrounded by a thin alumina shell, allowing long-term stability in ethanol. Well-defined plasmonic resonances in the UV and visible ranges are experimentally evidenced on single nanoparticles.
description: Author version of the published paper
Simultaneous optimization of cycle and expander design for truck on board waste heat recovery with ORC technology
Creators: name: Manfredi, Marco
name: Spinelli, Andrea
name: Astolfi, Marco
Publisher: name: Technical University of Munich
Year: 2021

description: Small-scale Organic Rankine Cycles (ORCs) represent a promising technology for waste heat recovery (WHR) from internal combustion engines (ICEs) for transport applications, due to their remarkable potential, especially on¬board of innovative long-haul trucks. Despite market leader companies have already proved its effectiveness, detailed system design procedures are scarcely available in the open literature and proposed solutions are often more simplified with respect to current industrial state¬of¬art. The present work describes a methodology to include within the ORC design and optimization procedure an efficiency map of the turbo¬expander, retrieved exploiting a mean line reduced¬order method developed in¬house. The developed ORC optimization algorithm allows to consider any working fluid in available thermodynamic databases and can investigate multiple cycle architectures. The approach proposed allows to design the thermodynamic cycle considering a realistic performance of the expander and to retrieve the best cycle architectures and turbine geometry depending on the heat source characteristic and active constraints. Methodology is applied to two WHR applications of different sizes highlighting the impact of adopting efficiency maps for the turbine within the cycle optimization procedure rather than assuming fixed efficiency values.
Spectral types of planetary host star candidates from OGLE III
Creators: name: Dreizler, S.
name: Schuh, S.
name: Homeier, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Optical Gravitational Lensing Experiment project has recently provided the OGLE III list of low-luminosity object transits from campaigns #3 and #4, reporting 40 new objects exhibiting the low-amplitude photometric eclipses expected for exoplanets. Compared to previous OGLE targets, these OGLE III candidates have been more restrictively selected and may contain low-mass planets. We have secured follow-up low-resolution spectroscopy for 28 candidates out of this list (and one from the OGLE Carina fields) to obtain an independent characterization of the primary stars by spectral classification and thus better constrain the parameters of their companions. We fed the constraints from these results back into an improved light curve solution. Together with the radius ratios from the transit measurements, we derived the radii of the low-luminosity companions. This allows us to examine the possible sub-stellar nature of these objects. Sixteen of the companions can be clearly identified as low-mass stars orbiting a main sequence primary, while 10 more objects are likely to have red giant primaries and therefore also host a stellar companion; 3 possibly have a sub-stellar nature R< 0.15 R_sun). The planetary nature of these objects should therefore be confirmed by dynamical mass determinations.
description: 3 Figures, A&A, in press
Gapless Hartree-Fock-Bogoliubov Approximation for Bose Gases
Creators: name: Yukalov, V. I.
name: Kleinert, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A dilute Bose system with Bose-Einstein condensate is considered. It is shown that the Hartree-Fock-Bogolubov approximation can be made both conserving as well as gapless. This is achieved by taking into account all physical normalization conditions, that is, the normalization condition for the condensed particles and that for the total number of particles. Two Lagrange multipliers, introduced for preserving these normalization conditions, make the consideration completely self-consistent.
description: Latex file, 22 pages, 2 figures
Polynomial Chaos-Based Flight Control Optimization with Guaranteed Probabilistic Performance
Creators: name: Shi, Dalong
name: Fang, Xiang
name: Holzapfel, Florian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: A probabilistic performance-oriented controller design approach based on polynomial chaos expansion and optimization is proposed for flight dynamic systems. Unlike robust control techniques where uncertainties are conservatively handled, the proposed method aims at propagating uncertainties effectively and optimizing control parameters to satisfy the probabilistic requirements directly. To achieve this, the sensitivities of violation probabilities are evaluated by the expansion coefficients and the fourth moment method for reliability analysis, after which an optimization that minimizes failure probability under chance constraints is conducted. Afterward, a time-dependent polynomial chaos expansion is performed to validate the results. With this approach, the failure probability is reduced while guaranteeing the closed-loop performance, thus increasing the safety margin. Simulations are carried out on a longitudinal model subject to uncertain parameters to demonstrate the effectiveness of this approach.
description: This work has been accepted in 21st IFAC World Congress
Nutritional composition, in vitro starch digestibility and estimated glycemic index of three varieties of 'Kluai Namwa' banana (Musa sapientum L.) and its products
Creators: name: Nednapis Vatanasuchart
name: Pisut Butsuwan
name: Wassana Narasri
Publisher: name: Maejo University
Year: 2015
Subjects: Bananas,nutritional composition,starch digestibility,glycemic index

description: 2, 9, Maejo International Journal of Science and Technology
Annihilation diagram contribution to charmonium masses
Creators: name: Zhang, Renqiang
name: Sun, Wei
name: Chen, Feiyu
name: Chen, Ying
name: Gong, Ming
name: Jiang, Xiangyu
name: Liu, Zhaofeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this work, we generate gauge configurations with $N_f=2$ dynamical charm quarks on anisotropic lattices. The mass shift of $1S$ and $1P$ charmonia owing to the charm quark annihilation effect can be investigated directly in a manner of unitary theory. The distillation method is adopted to treat the charm quark annihilation diagrams at a very precise level. For $1S$ charmonia, the charm quark annihilation effect almost does not change the $J/ψ$ mass, but lifts the $η_c$ mass by approximately 3-4 MeV. For $1P$ charmonia, this effect results in positive mass shifts of approximately 1 MeV for $χ_{c1}$ and $h_c$, but decreases the $χ_{c2}$ mass by approximately 3 MeV. We have not obtain a reliable result for the mass shift of $χ_{c0}$. In addition, it is observed that the spin averaged mass of the spin-triplet $1P$ charmonia is in a good agreement with the $h_c$, as expected by the non-relativistic quark model and measured by experiments.
Chiara Monzani;Giulio Cerino Abdin;Alberto Poggio
Creators: name: Design, Optimal
Publisher: name: Technical University of Munich
Year: 2021
Subjects: District heating; Biomass; Combined heat and power; Organic Rankine cycle; Emissions Trading System ETS

description: Hybrid power plants comprising combined heat and power (CHP) integrated with a biomass-fired Organic Rankine Cycle (ORC) represent interesting opportunities for efficient district heating (DH) systems, increasing the level of renewable energy use and producing additional electric power at high efficiency. Nevertheless, in the case of biomass-fuelled plants, there is an increasing necessity for good alignment with the potential of the territory. In this paper, the mountain area of Susa Valley (NorthWest Italy) is investigated to find an optimal solution for the installation of a 1 MWe ORC unit, exploiting wood chips available in the area. The analysis concerns the simulation of three different thermal plants (two existing DH systems fuelled by natural gas and one at the design stage) characterized by different sizes of demand and percentages of user type (eg. residential, tertiary). The study first analysed real data available for the two existing DH systems (30 minute steps over 5 years), evaluating normalized thermal load. Then, based on climate data and the characteristics of the thermal user, a Matlab model was used to evaluate the new DH system at hourly intervals and to simulate both of the existing configuration plants in order to assess different plant designs. Finally, the Matlab model is used to identify the best solution, in terms of energy, environmental and economic aspects. For each case study, specific KPI (Key Performance Indicators) were evaluated, such as energy efficiency, primary energy consumption, carbon dioxide emissions and SPBT (Simple Payback Time). The study highlights the ORC’s role in the Emission Trading System (ETS) scheme in order to reduce total CO2 emissions of thermal plants and to obtain better economic return with respect to ever-increasing costs of environmental burdens linked to ETS. Due to the profit margin for heat and of electricity in the Italian context, the study found the optimal choice to be the DH system which is characterized by the highest heat sales and the lowest DH network temperatures.
Elicitation - switch-reference and time
Creators: name: Soria Pérez, Celia
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: amc

description: This bundle contains recordings and associated notes from an elicitation session conducted by Emily Clem with Celia Soria Pérez. Topics covered include the expression of time in switch-reference constructions, attitude reports, and the syntax of nominals.
On the nature of the cool component of MWC 560
Creators: name: Gromadzki, M.
name: Mikolajewska, J.
name: Whitelock, P. A.
name: Marang, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: MWC 560 (V694 Mon) is one of the most enigmatic symbiotic system with a very active accretion-powered hot component. Such activity can be supported only by a luminous asymptotic giant branch star, i.e. a Mira or SR variable, with a high mass-loss rate. It is also a very unusual jet source because the jet axis lies practically parallel to the line of sight. The aims of our study are the determination of the evolutionary status of the cool component of MWC 560. Our methods involve analysis of near-IR JHKL and optical light curves. The cool component of MWC 560 pulsates with a period of ~340 days, and it is probably a red SR variable on the thermally pulsing AGB. The high mass-loss rate expected for such a star is sufficient to power the observed activity of the hot companion.
description: 6 pages, 2 figues, AA accepted
Thermodynamic and thermoeconomic evaluation and optimization of an ORC coupled to a combined reverse osmosis/membrane distillation desalination system
Creators: name: Mouaky, Ammar
name: Rachek, Adil
Publisher: name: Technical University of Munich
Year: 2021
Subjects: ORC; Exergoeconomic; Hybridization; Optimization

description: This paper aims to evaluate and optimize the exergy and exergoeconomic performances of a 100 kWe ORC block coupled to a combined reverse osmosis/membrane desalination (MD) system to meet the electricity, hot water, and freshwater requirements for a remote inland community. The studied plant’s configuration includes a hybrid solar/biomass heat generation system feeding an ORC cycle. Depending on the end-users’ electricity load demand, part of the produced electricity can be used to drive a reverse osmosis unit for brackish water desalination. On the other hand, a fraction of the heat rejected from the ORC condenser is recovered to meet the community's hot water requirements and to feed a membrane distillation unit used to minimize the brine liquid discharge rejected by the reverse osmosis process. Optimization studies based on genetic algorithms were conducted at design conditions to evaluate the impact of the ORC working fluid, its operating conditions, and the hot source temperature on the ORC exergy efficiency, hourly exergoeconomic cost of the produced useful outputs, and the membrane distillation permeate production. Besides, parametric studies were conducted to evaluate the impact of biomass cost, main plant’s components costs, and the solar field’s aperture on the investigated system’s performances. Results showed that R245-fa allows achieving the optimal ORC exergy efficiency and MD permeate production, whereas R1336mzz(Z) permits reaching the minimum overall exergoeconomic cost. Results also showed that for the case of R245-fa, increasing the hot source temperature has a positive impact on the plant’s performances. According to the parametric studies results, biomass cost and ORC investment cost are the most influencing cost items on the hourly exergoeconomic cost of the system. Parametric studies also showed that the increase of the solar field aperture from 1106.4 to 3319.2 m² leads to a rise of the overall exergoeconomic cost by up to 29.87%.
Genetic mapping of leaf blast resistance gene in landrace rice cultivar 'GS19769'
Creators: name: Nonglak Parinthawong
name: Pennapar Tansian
name: Tanee Sreewongchai
Publisher: name: Maejo University
Year: 2015
Subjects: genetic mapping,rice blast,landrace rice,Magnaporthe oryzae,SSR markers

description: 2, 9, Maejo International Journal of Science and Technology
Cutoff-Free Propagation of Torsional Alfvén Waves Along Thin Magnetic Flux Tubes
Creators: name: Musielak, Z. E.
name: Routh, S.
name: Hammer, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Propagation of torsional Alfvén waves along magnetic flux tubes has been extensively studied for many years but no conclusive results regarding the existence of a cutoff frequency for these waves have been obtained. The main purpose of this paper is to derive new wave equations that describe the propagation of linear torsional Alfvén waves along thin and isothermal magnetic flux tubes, and use these wave equations to demonstrate that the torsional wave propagation is not affected by any cutoff frequency. It is also shown that this cutoff-free propagation is independent of different choices of the coordinate systems and wave variables adopted in the previous studies. A brief discussion of implications of this cutoff-free propagation of torsional tube waves on theories of wave heating of the solar and stellar atmospheres is also given.
description: 13 pages, to appear in ApJ Vol 660 No 1
Getting hotter by heating less: How driven granular materials dissipate energy in excess
Creators: name: Plati, A.
name: de Arcangelis, L.
name: Gnoli, A.
name: Lippiello, E.
name: Puglisi, A.
name: Sarracino, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate how the kinetic energy acquired by a dense granular system driven by an external vibration depends on the input energy. Our focus is on the dependence of the granular behavior on two main parameters: frequency and vibration amplitude. We find that there exists an optimal forcing frequency, at which the system reaches the maximal kinetic energy: if the input energy is increased beyond such a threshold, the system dissipates more and more energy and recovers a colder and more viscous state. Quite surprisingly, the nonmonotonic behavior is found for vibration amplitudes which are sufficiently small to keep the system always in contact with the driving oscillating plate. Studying dissipative properties of the system, we unveil a striking difference between this nonmonotonic behavior and a standard resonance mechanism. This feature is also observed at the microscopic scale of the single-grain dynamics and can be interpreted as an instance of negative specific heat. An analytically solvable model based on a generalized forced-damped oscillator well reproduces the observed phenomenology, illustrating the role of the competing effects of forcing and dissipation.
Experimental investigation of response time characteristics of an organic Rankine cycle evaporator for waste heat recovery
Creators: name: Jimenez-Arreola, Manuel
name: Wieland, Christoph
name: Romagnoli, Alessandro
Publisher: name: Technical University of Munich
Year: 2021

description: On this paper a test rig that focuses on the dynamic and transient behavior of an ORC system for waste heat recovery is presented. An experimental campaign is carried out in order to analyze the transient behavior of a single finned-tube evaporator under continuous and discrete fluctuations of the heat source. The experimental results show the dynamic response of a custom-made ORC evaporator to sinusoidal fluctuations and ramp changes of the heat source. Due to its large thermal inertia, the evaporator is able to dampen fluctuations of the heat source in the MHz range, in fact, effectively “filtering out” sinusoidal fluctuations with frequencies larger than at least 1.67 MHz. This large thermal inertia of the ORC evaporator is accomplished by means of a heat exchanger design where the fins have a significant mass. The study illustrates how the design of the evaporator can be an important aspect in ORC dynamic performance that is often taken for granted. This is critical for applications in which the variability of the heat source is inherent, such as waste heat recovery.
Magnon-magnon interaction and magnon relaxation time in ferromagnetic Cr2Ge2Te6 monolayer
Creators: name: Wang, Ke
name: Xu, Xiansong
name: Cheng, Yuan
name: Zhang, Min
name: Wang, JianSheng
name: Wang, Hai
name: Zhang, Gang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Despite the intense amount of attention and huge potential of two-dimensional (2D) magnets for applications in novel magnetic, magneto-optical, magneto-thermal and magneto-electronic devices, there has yet to be a robust strategy developed to systematically understand magnon-magnon (MMI) interactions at finite temperature. In this paper, we present a first-principles theoretical method to introduce the finite temperature magnon-magnon interaction into Heisenberg Hamiltonian through a nonlinear correction energy. The Wick theorem is used to decouple the four-magnon operators to two-magnon order. We demonstrate the capabilities of this method by studying the strength of MMI in Cr2Ge2Te6 (CGT) monolayer. The spin wave spectrum at finite temperature and the time-dependent spin autocorrelation function are explored. It is found that the magnon relaxation time due to magnon-magnon scattering increases with temperature because of the reduction in magnon energy, while decreases with wavevector and external magnetic field. Our results provide a new insight to understand the magnon damping and energy dissipation in two-dimensional ferromagnetic materials.
description: 24 pages,6 figures
A Shack-Hartmann wavefront sensor projected onto the sky with reduced focal anisoplanatism
Creators: name: Butterley, T.
name: Love, G. D.
name: Wilson, R. W.
name: Myers, R. M.
name: Morris, T. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A method for producing a laser guide star wavefront sensor for adaptive optics with reduced focal anisoplanatism is presented. A theoretical analysis and numerical simulations have been carried out and the results are presented. The technique, named SPLASH (Sky-Projected Laser Array Shack-Hartmann), is shown to suffer considerably less from focal anisoplanatism than a conventional laser guide star system. The method is potentially suitable for large telescope apertures (~8m), and possibly for extremely large telescopes.
description: 8 pages, 5 figures, accepted for publication in MNRAS
Effect of quantum fluctuations on topological excitations and central charge in supersymmetric theories
Creators: name: Shizuya, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The effect of quantum fluctuations on Bogomol'nyi-Prasad-Sommerfield (BPS)-saturated topological excitations in supersymmetric theories is studied. Focus is placed on a sequence of topological excitations that derive from the same classical soliton or vortex in lower dimensions and it is shown that their quantum characteristics, such as the spectrum and profile, differ critically with the dimension of spacetime. In all the examples examined the supercharge algebra retains its classical form although short-wavelength fluctuations may modify the operator structure of the central charge, yielding an anomaly. The central charge, on taking the expectation value, is further affected by long-wavelength fluctuations, and this makes the BPS-excitation spectra only approximately calculable in some low-dimensional theories. In four dimensions, in contrast, holomorphy plays a special role in stabilizing the BPS-excitation spectra against quantum corrections. The basic tool in our study is the superfield supercurrent, from which the supercharge algebra with a central extension is extracted in a supersymmetric setting. A general method is developed to determine the associated superconformal anomaly by considering dilatation directly in superspace.
description: 10 pages, Revtex, to appear in PRD
Diagnosing Energy Loss: PHENIX Results on High-pT Hadron Spectra
Creators: name: Sahlmueller, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Measurements of inclusive spectra of hadrons at large transverse momentum over a broad range of energy in different collision systems have been performed with the PHENIX experiment at RHIC. The data allow to study the energy and system size dependence of the suppression observed in RAA of high-pT hadrons at sqrt(s_NN)= 200 GeV. Due to the large energy range from sqrt(s_NN)= 22 GeV to 200 GeV, the results can be compared to results from CERN SPS at a similar energy. The large Au+Au dataset from the 2004 run of RHIC also allows to constrain theoretical models that describe the hot and dense matter produced in such collisions. Investigation of particle ratios such as eta/pi0 helps understanding the mechanisms of energy loss.
description: 4 pages, 6 figures. To appear in the proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2006), Shanghai, China, November 14-20, 2006
title: The meaning of adolescent attachment in a male boarding school : an interpretative phenomenological analysis
Creators: name: Lauryn, Shirley Salima
Publisher: name: University of Kent
Year: 2012

description: Objective: Emphasis is often placed on the negative psychological effects of boarding school on children under the age of 11, yet a literature review revealed that there has been little research into effects on boarding school adolescent males. Therefore the aim of this study was to begin to explore the meaning attributed to the experience of being an adolescent male in a boarding school focusing on the psychological effects of boarding and its impact on their individual experience of relating. Method: Six ex-pupils of a male boarding school were recruited. Participants were interviewed using a semi structured audio-recorded interview, covering early attachment experiences, school experiences and post school relationships. Interview data were qualitatively analysed using interpretative phenomenological analysis (IPA) to study participants' experience from 'their perspective. Participants also rated themselves on an attachment questionnaire. Results: Five super-ordinate themes were identified: "Family tradition"; "coping through self-reliance"; boarding school male identity; "ease through etiquette v dis-ease in relationships"; "elucidation through process of past and present". Conclusions: The findings of this study highlight 1) the potential significance of how caregivers, pastoral and teaching staff relate to the male adolescent in an all-male boarding school. 2) that separation from father may be a key factor for the boarding school male adolescent. 3) that more research may be needed on how all-male boarding schools and the gender balance of their staffing impact on alumni's ability to relate to women.
Fingerprint of chaos and quantum scars in kicked Dicke model: An out-of-time-order correlator study
Creators: name: Sinha, Sudip
name: Ray, Sayak
name: Sinha, Subhasis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the onset of chaos in a periodically kicked Dicke model (KDM), using the out-of-time-order correlator (OTOC) as a diagnostic tool, in both the oscillator and the spin subspaces. In the large spin limit, the classical Hamiltonian map is constructed, which allows us to investigate the corresponding phase space dynamics and to compute the Lyapunov exponent. We show that the growth rate of the OTOC for the canonically conjugate coordinates of the oscillator is able to capture the Lyapunov exponent in the chaotic regime. The onset of chaos is further investigated using the saturation value of the OTOC, that can serve as an alternate indicator of chaos in a generic interacting quantum system. This is also supported by a system independent effective random matrix model. We further identify the quantum scars in KDM and detect their dynamical signature by using the OTOC dynamics. The relevance of the present study in the context of ongoing cold atom experiments is also discussed.
Dynamics of SCO2 heat to power units equipped with dual tank inventory control system
Creators: name: Marchionni, Matteo
name: Bianchi, Giuseppe
name: Tassou, Savvas A
Publisher: name: Technical University of Munich
Year: 2021

description: A key aspect in upscaling the technology readiness level of supercritical CO2 (sCO2) power generation systems is the control of the main cycle parameters (i.e. temperature at the turbine or compressor inlet) at off-design conditions and during transient operation. A further challenge in small scale (0.5MWe) systems is the limited number of control variables due to the streamlined configuration of the power units. Among the possible control strategies, is the regulation of the system inventory, which consists of the variation of the CO2 fluid mass (or charge) in the power loop to achieve a given control target. Such strategy, which relies on different storage tanks for injections/withdrawals of the working fluid into/from the system, poses several technical challenges that are still not fully understood. To fill the gap, this work presents an analysis of inventory control systems. The impact of this control approach is investigated using a high-fidelity one-dimensional simulation platform calibrated on a 50 kW simple regenerative High Temperature Heat to Power sCO2 test facility being commissioned at Brunel University London. Transient simulations are carried out to assess the dynamics of the main thermodynamic variables in the power loop and the inventory tanks. Stability implications (e.g. pressure gradients in the loop) as well as the effects of size of the inventory tanks are discussed. Inventory tanks with a volume 3 times higher than the one of the power loop (including the receiver) can lead to a higher controllability range (±30% of the nominal turbine inlet temperature) and an extended availability of the control action (slower tank discharge).
General Relativistic Dynamics of Compact Binary Systems
Creators: name: Blanchet, Luc
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The equations of motion of compact binary systems have been derived in the post-Newtonian (PN) approximation of general relativity. The current level of accuracy is 3.5PN order. The conservative part of the equations of motion (neglecting the radiation reaction damping terms) is deducible from a generalized Lagrangian in harmonic coordinates, or equivalently from an ordinary Hamiltonian in ADM coordinates. As an application we investigate the problem of the dynamical stability of circular binary orbits against gravitational perturbations up to the 3PN order. We find that there is no innermost stable circular orbit or ISCO at the 3PN order for equal masses.
description: 13 pages, to appear in the special issue of the Comptes rendus de l'Academie des Sciences de Paris on "Observations of black holes and extreme gravitational events", edited by Daniel Rouan
Formulas for the Matrix Cosine and Sine of the Lie Algebra of Lorentz Matrix Lie Group SO(1, 3)
Creators: name: Poonchayar Patthanangkoor
Publisher: name: Research Division
Year: 2023
Subjects: Matrix cosine
Matrix sine
Sylvester's formula
Lie algebra of Lorentz matrix Lie group

description: Thai Science and Technology Journal, 31, 6, 1-12
Cleigastra apicalis
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Cleigastra
Cleigastra apicalis

description: Cleigastra apicalis (MEIGEN, 1826)
M a t e r i a l e x a m i n e d: Czech Republic: Kynšperk nad Ohří (5841), 2.vi.2012, 1♂, Šifner leg. (FSPC); Plzeň-Slovany (6246), 4.vi.2009, 1♀, Dvořáková leg. (FSPC); Turovec (6654), 29.iv.1999, 1♂, Šifner leg. (FSPC); SPR Velký Tisý (6954), 12.v.2001, 2♂♂, Šifner leg. (FSPC); Český Rudolec (6957), 25.iv.2007, 1♂, Máca leg. (MMSC). Finland: Oulanka Biol. Station, 12.vii.1967, 1♂, Mihályi leg. (HNHM). Poland: Umgebung Breslau [= Wrócław environs], A.S. [= Alte Sammlung = old collection], 1♂, without data, Schiner det. as C. apicalis (NHMW).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1647, DOI: 10.5281/zenodo.5277519
Effect of Fermented-red Yeast Rice (Angkak) on Physico-chemical Properties, Textural Properties, and Anti-oxidant Activity of Dried Rice Noodles
Creators: name: Sunsanee Udomrati
Publisher: name: Research Division
Year: 2023
Subjects: Angkak Noodles
Texture
Antioxidant activity
Fermented red yeast rice

description: Thai Science and Technology Journal, 31, 6, 13-27
Cordilura ciliata
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Cordilura
Cordilura ciliata

description: Cordilura ciliata (MEIGEN, 1826)
M a t e r i a l e x a m i n e d: Czech Republic: Chyňava-Podkozí (5950), 11.v.2016, 1♂, Šifner leg. (FSPC); Vysoká-Háje (6041), 25.vii.2014, 1♂, Dvořák leg. (FSPC); Včelákov (6161), 17.vii.2007, 1♂, Máca leg. (MMSC); Loučovice (7151), 15.vii.2006, 1♀, Máca leg. (FSPC); Kraslice (5641), 7.vii.2001, 1♀, Šifner leg. (FSPC). Finland: Oulanka, 22.vii.1967, 5♀♀ (HNHM). Italia: Veneto, 5.vii.1913, 1♀, Maidl & Zerny leg. (NHMW). Poland: Nimptsch [= Niemcze], 1♀, without data, Duda leg. (NHMW), Bialowieza reservation, 10.viii.1957, 1♀, Soós leg. (HNHM).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1647, DOI: 10.5281/zenodo.5277519
title: Dynamic Prediction, Mediation and Communication for Survival Outcomes, with applications to Cystic Fibrosis
Creators: name: Tanner, KT
Publisher: name: London School of Hygiene & Tropical Medicine
Year: 2021

description: Patients with chronic diseases and their clinicians want accurate and up-to-date information about risk, prognosis, and survival. The overall aim of this thesis is to advance statistical methods available for providing such information. The methods are motivated by analysis of cystic fibrosis (CF), a genetic life-shortening disease, and illustrated using longitudinal data from the UK CF Registry. First, dynamic models, that update predicted survival probabilities as new measurements become available, are studied. Although machine learning methods are established for prediction problems, they have not been widely used in dynamic survival prediction. Here, the combination of a machine learning ensemble with the landmarking approach is developed. Predictive performance of this method is compared to that of the most commonly-used statistical techniques: joint modelling and landmarking. A simulation study investigates cases where a machine learning ensemble may improve predictive accuracy. This thesis then provides a review of literature on communicating survival predictions, focusing on preferred graphical formats, comprehension by a broad audience, and best practices in survival communication. Based on this literature and semi-structured interviews conducted by qualitative research partners, an online tool was created. This provides life expectancy information sensitively and according to an individual's characteristics. In the final part of the thesis, CF-related diabetes (CFRD), a common comorbidity of CF, and its role in survival are investigated. Using multi-state models, the relationship between CFRD and survival is described. Mechanisms through which CFRD affects survival are explored using two methods that can accommodate longitudinal mediators for survival outcomes. Each method is applied to a stacked dataset, constructed in similar fashion to a landmark dataset, designed to maximally use the longitudinal registry data. A simulation study investigates the sensitivity of these two methods to model misspecification and data availability issues.
Conditional Coupled Generative Adversarial Networks for Zero-Shot Domain Adaptation
Creators: name: Wang, Jinghua
name: Jiang, Jianmin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Machine learning models trained in one domain perform poorly in the other domains due to the existence of domain shift. Domain adaptation techniques solve this problem by training transferable models from the label-rich source domain to the label-scarce target domain. Unfortunately, a majority of the existing domain adaptation techniques rely on the availability of target-domain data, and thus limit their applications to a small community across few computer vision problems. In this paper, we tackle the challenging zero-shot domain adaptation (ZSDA) problem, where target-domain data is non-available in the training stage. For this purpose, we propose conditional coupled generative adversarial networks (CoCoGAN) by extending the coupled generative adversarial networks (CoGAN) into a conditioning model. Compared with the existing state of the arts, our proposed CoCoGAN is able to capture the joint distribution of dual-domain samples in two different tasks, i.e. the relevant task (RT) and an irrelevant task (IRT). We train CoCoGAN with both source-domain samples in RT and dual-domain samples in IRT to complete the domain adaptation. While the former provide high-level concepts of the non-available target-domain data, the latter carry the sharing correlation between the two domains in RT and IRT. To train CoCoGAN in the absence of target-domain data for RT, we propose a new supervisory signal, i.e. the alignment between representations across tasks. Extensive experiments carried out demonstrate that our proposed CoCoGAN outperforms existing state of the arts in image classifications.
Classifier Technology and the Illusion of Progress
Creators: name: Hand, David J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: A great many tools have been developed for supervised classification, ranging from early methods such as linear discriminant analysis through to modern developments such as neural networks and support vector machines. A large number of comparative studies have been conducted in attempts to establish the relative superiority of these methods. This paper argues that these comparisons often fail to take into account important aspects of real problems, so that the apparent superiority of more sophisticated methods may be something of an illusion. In particular, simple methods typically yield performance almost as good as more sophisticated methods, to the extent that the difference in performance may be swamped by other sources of uncertainty that generally are not considered in the classical supervised classification paradigm.
description: This paper commented in: [math.ST/0606447], [math.ST/0606452], [math.ST/0606455], [math.ST/0606457]. Rejoinder in [math.ST/0606461]. Published at http://dx.doi.org/10.1214/088342306000000060 in the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)