cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Shell model for heavy nuclei and its application in nuclear astrophysics
Creators: name: Sun, Yang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Performing shell model calculations for heavy nuclei is a long-standing problem in nuclear physics. The shell model truncation in the configuration space is an unavoidable step. The Projected Shell Model (PSM) truncates the space under the guidance of the deformed mean-field solutions. This implies that the PSM uses a novel and efficient way to bridge the two conventional methods: the deformed mean-field approximations, which are widely applied to heavy nuclei but able to describe the physics only in the intrinsic frame, and the spherical shell model diagonalization method, which is most fundamental but feasible only for small systems. We discuss the basic philosophy in construction of the PSM (or generally PSM-like) approach. Several examples from the PSM calculations are presented. Astrophysical applications are emphasized.
description: 14 pages, 5 figures, invited talk at International Conference on Nuclear Structure Physics, Shanghai, June 2006
Effective Quark Antiquark Potential in the Quark Gluon Plasma from Gravity Dual Models
Creators: name: Antipin, Oleg
name: Burikham, Piyabut
name: Li, Jun
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We estimate the effective heavy quark and antiquark potential in the quark gluon plasma using the gravity dual theory. Two models are considered: $AdS_{5}$ and Sakai-Sugimoto model. The effective potential, obtained by using the rotating fundamental open-string configurations, has the angular momentum dependence which generalizes the static central potential. Motivated by the asymptotic form for zero angular momentum state, we fit the effective potential for $J=1,2$ states in the binding region. The fitting parameters are found to be functions of temperature. Finally, we discuss the differences and similarities of the effective potential between the two gravity dual models. An interesting result is that position of the minimum of potential is determined only by angular momentum and independent of the temperature.
description: 23 pages, 12 figures, 3 tables, subsection on mass dependence of the potential added
Blazar sequence - an artefact of Doppler boosting
Creators: name: Nieppola, E.
name: Valtaoja, E.
name: Tornikoski, M.
name: Hovatta, T.
name: Kotiranta, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The blazar sequence is a scenario in which the bolometric luminosity of the blazar governs the appearance of its spectral energy distribution. The most prominent result is the significant negative correlation between the synchrotron peak frequencies and the synchrotron peak luminosities of the blazar population. Observational studies of the blazar sequence have, in general, neglected the effect of Doppler boosting. We study the dependence of both the synchrotron peak frequency and luminosity with Doppler-corrected quantities. We determine the spectral energy distributions of 135 radio-bright AGN and find the best-fit parabolic function for the distribution to quantify their synchrotron emission. The corresponding measurements of synchrotron peak luminosities and frequencies are Doppler-corrected with a new set of Doppler factors calculated from variability data. The relevant correlations for the blazar sequence are determined for these intrinsic quantities. The Doppler factor depends strongly on the synchrotron peak frequency, the lower energy sources being more boosted. Applying the Doppler correction to the peak frequencies and luminosities annuls the negative correlation between the two quantities, which becomes positive. For BL Lacertae objects, the positive correlation is particularly strong. The blazar sequence, when defined as the anticorrelation between the peak frequency and luminosity of the synchrotron component of the spectral energy distribution, disappears when the intrinsic, Doppler-corrected values are used. It is an observational phenomenon created by variable Doppler boosting across the synchrotron peak frequency range.
description: 9 pages, 5 figures + 2 tables. The published version with minor changes, the main conclusions are unchanged
Deployable Dashboard Service as Open Source Software (Licence to be Agreed) Including Data Aggregation, Display
Creators: name: HIRMEOS Consortium
Publisher: name: Zenodo
Year: 2019
Subjects: open source
metrics
monographs

description: This document is a HIRMEOS project deliverable. As part of Hirmeos WP6 about metrics, Knowledge Unlatched Research provided a
 dashboard built for partners to visualise and interrogate usage data from a variety of
 sources. The dashboard is capable of displaying usage by country and other IP range
 selections for each book or identifier as appropriate.
Redshift Filtering by Swift Apparent X-ray Column Density
Creators: name: Grupe, Dirk
name: Nousek, John A.
name: Berk, Daniel E. vanden
name: Roming, Peter W. A.
name: Burrows, David N.
name: Godet, Olivier
name: Osborne, Julian
name: Gehrels, Neil
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We remark on the utility of an observational relation between the absorption column density in excess of the Galactic absorption column density, $ΔN_{\rm H} = N_{\rm H, fit} - N_{\rm H, gal}$, and redshift, z, determined from all 55 Swift-observed long bursts with spectroscopic redshifts as of 2006 December. The absorption column densities, $N_{\rm H, fit}$, are determined from powerlaw fits to the X-ray spectra with the absorption column density left as a free parameter. We find that higher excess absorption column densities with $ΔN_{\rm H} > 2\times 10^{21}$ cm$^{-2}$ are only present in bursts with redshifts z$
description: revised version including updates and the referee's comments, accepted for publication in the Astronomical Journal, 12 pages, 2 figures, 2 tables - v3 contains an update on the reference list
Magnetar-Driven Magnetic Tower as a Model for Gamma-Ray Bursts and Asymmetric Supernovae
Creators: name: Uzdensky, Dmitri A.
name: MacFadyen, Andrew I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider a newly-born millisecond magnetar, focusing on its interaction with the dense stellar plasma in which it is initially embedded. We argue that the confining pressure and inertia of the surrounding plasma acts to collimate the magnetar's Poynting-flux-dominated outflow into tightly beamed jets and increases its magnetic luminosity. We propose this process as an essential ingredient in the magnetar model for gamma-ray burst and asymmetric supernova central engines. We introduce the ``pulsar-in-a-cavity'' as an important model problem representing a magnetized rotating neutron star inside a collapsing star. We describe its essential properties and derive simple estimates for the evolution of the magnetic field and the resulting spin-down power. We find that the infalling stellar mantle confines the magnetosphere, enabling a gradual build-up of the toroidal magnetic field due to continuous twisting. The growing magnetic pressure eventually becomes dominant, resulting in a magnetically-driven explosion. The initial phase of the explosion is quasi-isotropic, potentially exposing a sufficient amount of material to $^{56}$Ni-producing temperatures to result in a bright supernova. However, if significant expansion of the star occurs prior to the explosion, then very little $^{56}$Ni is produced and no supernova is expected. In either case, hoop stress subsequently collimates the magnetically-dominated outflow, leading to the formation of a magnetic tower. After the star explodes, the decrease in bounding pressure causes the magnetic outflow to become less beamed. However, episodes of late fallback can reform the beamed outflow, which may be responsible for late X-ray flares.
description: 16 pages, 7 figures; accepted to ApJ
Effects from inhomogeneities in the chiral transition
Creators: name: Taketani, Bruno G.
name: Fraga, Eduardo S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We consider an approximation procedure to evaluate the finite-temperature one-loop fermionic density in the presence of a chiral background field which systematically incorporates effects from inhomogeneities in the chiral field through a derivative expansion. We apply the method to the case of a simple low-energy effective chiral model which is commonly used in the study of the chiral phase transition, the linear sigma-model coupled to quarks. The modifications in the effective potential and their consequences for the bubble nucleation process are discussed.
description: 11 pages, 5 figures. v2: appendix and references added, published version
Large deviations for random walks under subexponentiality: the big-jump domain
Creators: name: Denisov, D.
name: Dieker, A. B.
name: Shneer, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G50, 60F10 (Primary)

description: For a given one-dimensional random walk $\{S_n\}$ with a subexponential step-size distribution, we present a unifying theory to study the sequences $\{x_n\}$ for which $\mathsf{P}\{S_n>x\}\sim n\mathsf{P}\{S_1>x\}$ as $n\to\infty$ uniformly for $x\ge x_n$. We also investigate the stronger "local" analogue, $\mathsf{P}\{S_n\in(x,x+T]\}\sim n\mathsf{P}\{S_1\in(x,x+T]\}$. Our theory is self-contained and fits well within classical results on domains of (partial) attraction and local limit theory. When specialized to the most important subclasses of subexponential distributions that have been studied in the literature, we reproduce known theorems and we supplement them with new results.
description: Published in at http://dx.doi.org/10.1214/07-AOP382 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Magnetic signatures on mixed-mode frequencies. I. An axisymmetric fossil field inside the core of red giants
Creators: name: Bugnet, L.
name: Prat, V.
name: Mathis, S.
name: Astoul, A.
name: Augustson, K.
name: García, R. A.
name: Mathur, S.
name: Amard, L.
name: Neiner, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The discovery of the moderate differential rotation between the core and the envelope of evolved solar-like stars could be the signature of a strong magnetic field trapped inside the radiative interior. The population of intermediate-mass red giants presenting a surprisingly low-amplitude of their mixed modes could also arise from the effect of an internal magnetic field. Indeed, stars more massive than about 1.1Ms are known to develop a convective core during their main sequence, which could relax into a strong fossil magnetic field trapped inside the core of the star for the rest of its evolution. The observations of mixed modes can constitute an excellent probe of the deepest layers of evolved solar-like stars. The magnetic perturbation on mixed modes may thus be visible in asteroseismic data. To unravel which constraints can be obtained from observations, we theoretically investigate the effects of a plausible mixed axisymmetric magnetic field with various amplitudes on the mixed-mode frequencies of evolved solar-like stars. The first-order frequency perturbations are computed for dipolar and quadrupolar mixed modes. These computations are carried out for a range of stellar ages, masses, and metallicities. We show that typical fossil-field strengths of 0.1-1 MG, consistent with the presence of a dynamo in the convective core during the main sequence, provoke significant asymmetries on mixed-mode frequency multiplets during the red-giant branch. We show that these signatures may be detectable in asteroseismic data for field amplitudes small enough for the amplitude of the modes not to be affected by the conversion of gravity into Alfven waves inside the magnetised interior. Finally, we infer an upper limit for the strength of the field, and the associated lower limit for the timescale of its action, to redistribute angular momentum in stellar interiors.
description: 30 pages, 19 figures, Submitted to A&A, Revised version
Giant room temperature piezoresistance in a metal/silicon hybrid
Creators: name: Rowe, A. C. H.
name: Donoso-Barrera, A.
name: Renner, Ch.
name: Arscott, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Metal/semiconductor hybrids are artificially created structures presenting novel properties not exhibited by either of the component materials alone. Here we present a giant piezoresistance effect in a hybrid formed from silicon and aluminum. The maximum piezoresistive gage factor (GF) of 843, measured at room temperature, compares with a GF of -93 measured in the bulk homogeneous silicon. This piezoresistance boost is not due to the silicon/aluminum interface, but results from a stress induced anisotropy in the silicon conductivity that acts to switch current away from the highly conductive aluminum for uniaxial tensile strains. Its magnitude is shown, via the calculation of hybrid resistivity weighting functions, to depend only on the geometrical arrangement of the component parts of the hybrid.
description: 4 pages, 4 figures, accepted for publication in Physical Review Letters
Killing-Yano Tensors, Rank-2 Killing Tensors, and Conserved Quantities in Higher Dimensions
Creators: name: Krtous, Pavel
name: Kubiznak, David
name: Page, Don N.
name: Frolov, Valeri P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: From the metric and one Killing-Yano tensor of rank D-2 in any D-dimensional spacetime with such a principal Killing-Yano tensor, we show how to generate k=[(D+1)/2] Killing-Yano tensors, of rank D-2j for all j=0,...,k-1, and k rank-2 Killing tensors, giving k constants of geodesic motion that are in involution. For the example of the Kerr-NUT-AdS spacetime (hep-th/0604125) with its principal Killing-Yano tensor (gr-qc/0610144), these constants and the constants from the k Killing vectors give D independent constants in involution, making the geodesic motion completely integrable (hep-th/0611083). The constants of motion are also related to the constants recently obtained in the separation of the Hamilton-Jacobi and Klein-Gordon equations (hep-th/0611245).
description: 7 pages
Additional file 10 of A novel method for controlling unobserved confounding using double confounders
Creators: name: Liu, Lu
name: Hou, Lei
name: Yu, Yuanyuan
name: Liu, Xinhui
name: Sun, Xiaoru
name: Yang, Fan
name: Wang, Qing
name: Jing, Ming
name: Xu, Yeping
name: Li, Hongkai
name: Xue, Fuzhong
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 10 : Figure S7. The Simulation B2 result. Results shows the estimated biases, SE and MSE from the 3 models for varied effects of (a) the correlation between X and C1, (b) the correlation between C1 and C2.
Refracting profiles and generalized holodiagrams
Creators: name: Criado, C.
name: Alamo, N.
name: Rabal, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The recently developed concept of refracting profiles and that of refraction holodiagrams are combined so that the classical Abramson holodiagrams can be generalized taking into account a wider class of wave fronts and refraction at an interface, whenever regions of caustics are avoided. These holodiagrams are obtained as envelopes of specific families of Cartesian Ovals with an appropriate parametrization. Classical and reflecting holodiagrams are particular cases of this class. Several of the properties of the classical holodiagrams are shared by their richer generalized versions
description: 12 pages, 7 figures
A Time-Temperature Dataset for the Strawberry Cold Chain Across Multiple Shipments and Locations
Creators: name: Abdella, Alla
name: Brecht, Jeffrey K.
name: Uysal, Ismail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This article describes location aware temperature profiles from six strawberry shipments across the continental United States. Three pallets were instrumented in each shipment with three vertically placed loggers to take a longitudinal and latitudinal snapshot of 9 strategically different locations (including the top, middle and bottom layers of the pallets placed in the back, middle and the front of the shipping container) for a combined 54 measurement points across shipments of varying lengths. The sensors were instrumented in the field, right at the point of harvest, recorded temperatures every every 5 to 10 minutes depending on the shipment, and uploaded their data periodically via cellular radios on each device. The data is a result of significant collaboration between stakeholders from farmers to distributors to retailers to academics, which can play an important role for researchers and educators in food engineering, cold-chain, machine learning, and data mining, as well as in other disciplines related to food and transportation.
Condensate depletion in two-species Bose gases: A variational Quantum Monte Carlo study
Creators: name: Sakhel, A. R.
name: DuBois, J. L.
name: Glyde, H. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate two-species Bose gases in traps with various interactions using variational Quantum Monte Carlo (VMC) techniques at zero temperature. The bosons are represented by hard spheres (HS) whose diameter is equivalent to the s-wave scattering length in the low-energy and long-wavelength approximation. We explore the role of repulsive and attractive inter- or intraspecies interactions on the condensate properties of the mixtures, particularly the condensate fraction of each species as compared to the case when each species is in a separate trap of its own. We model the repulsive interactions by a hard core (HC) potential and the attractive interactions by a shallow model potential. The VMC density profiles and energies are evaluated at various interactions and two mass ratios of the species.
description: 20 pages, 18 figures
SELECTION AND FORECAST OF BIOMASS SUPPLY CHAIN EQUIPMENT FOR RENEWABLE FUEL PRODUCTION.pdf
Creators: name: Bilgili, Mehmet Emin
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 309999
subject: Other agricultural, veterinary and food sciences not elsewhere classified

description: The production of renewable fuels draws attention as a critical component of global strategies to reduce energy crises and greenhouse gas emissions in the world. Biomass has an important place in the production of all renewable fuels. As a result of the collection of raw materials for the production of biomass fuels, additional benefits such as reducing fires in some agro-forest areas can be achieved, while some environmental risks can be eliminated. In addition, additional income and reduced costs can be provided to farmers through the sale of residual products except for food and feed. At the point of selection and estimation of machines in the supply chain, an adequate working environment has not yet been achieved in today's conditions. The main purpose is to determine the workflow processes such as procurement, holding and storage of fuels within the scope of the supply chain during the year. During the harvesting and transportation of agricultural products, the basic parameters, excluding the moisture and physical condition (pellet, briquette, blend etc.) of the product, are: labour costs (TL/ton), diesel price (TL/L), lubrication ( TL/kg) is the price level for the machines. Machine costs are fixed costs (investment (TL/Machine), economic life (h/year), depreciation, working hours) and variable costs (repairs, fuel, lubrication). Although there are many design and modelling studies on this subject, there are no studies at the desired level on the selection and cost of equipment every single item in the supply chain. This study, it is aimed to provide data to the researchers and decision-makers on the subject of Türkiye and to contribute to the literature.
Additional file 11 of A novel method for controlling unobserved confounding using double confounders
Creators: name: Liu, Lu
name: Hou, Lei
name: Yu, Yuanyuan
name: Liu, Xinhui
name: Sun, Xiaoru
name: Yang, Fan
name: Wang, Qing
name: Jing, Ming
name: Xu, Yeping
name: Li, Hongkai
name: Xue, Fuzhong
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 11 : Figure S8. The Simulation C1 result. Results shows the estimated biases, SE and MSE from the 3 models for varied effects (a) of C1 on X, (b) the interaction effect of C1 and C2 on X, (c) U on X.
Doğu Akdeniz Bölgesinde Mısır ve Pamuk Üretiminde İnsan ve Makina İş Gücü Gereksinimlerinin Belirlenmesi.pdf
Creators: name: Bilgili, Mehmet Emin
name: KUZU, Hamza
name: AYBEK, Ali
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 300210
subject: Sustainable agricultural development

description: Nowadays, studies are carried out to reduce many aspects of production input costs in order to provide security of supply and demand in agricultural production and a suitable purchasing environment for the final consumer. In this study, the values of human and machine labor in the unit area of corn and cotton production were determined for the Eastern Mediterranean Region. Human and machine labor values used in corn production; for tillage and planting as İİG (human labor requirement) 12.2 h/ha, MİG (machine labor requirement) 10.9 h/ha, for maintenance works as İİG 74.2 h/ha, MİG 4.3 h/ha, for harvesting and threshing works as İİG 3.9 h/ha, MİG 2.9 h/ha, in the cotton production process, the processes and the values of İİG and MİG were determined as 12.3 h/ha, 11.2 h/ha 292.4 h/ha, 9.1 h/ha and 366.7 h/ha, 3.7 h/ha, respectively.
从打杂客中国之行费用列支探析小金库之危害
Creators: name: CPA Jim
Publisher: name: Zenodo
Year: 2021
Subjects: 武汉病毒研究所
世界卫生组织
粮食危机
WHO
Wuhan Institute of Virology
Bioweapon
China

description: 打杂客(Peter Daszak)2018年9月在中共官媒CGTN主办的节目上发表讲话时,直言不讳地透露,他确实接受了中共提供给他的报酬和资助。 打杂客从中共取得的收入不少于370万美元, 包含卡拉OK包间白酒、小姐接待(以下简称潜规则活动)等非货币化收入。 正常情况下,上面提到的370万美元很可能走的是武汉病毒研究所的项目预算,具体可能在“其他科技交流与合作支出”、“重大科学工程”等科目列支,属于预算内项目,但潜规则费用一般不走正规预算,根据中共国的“法律”,支出目的明显非法,不能列预算,尤其不能列武汉病毒研究所这种中央预算单位中国科学院下属而且有国家重点生物安全实验室的单位的预算,事情又不能因为没有预算就不去做,这时就需要预算外列支,通俗说就是从小金库列支
Additional file 12 of A novel method for controlling unobserved confounding using double confounders
Creators: name: Liu, Lu
name: Hou, Lei
name: Yu, Yuanyuan
name: Liu, Xinhui
name: Sun, Xiaoru
name: Yang, Fan
name: Wang, Qing
name: Jing, Ming
name: Xu, Yeping
name: Li, Hongkai
name: Xue, Fuzhong
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 12 : Figure S9. The Simulation C1 result. Results shows the estimated biases, SE and MSE from the 3 models for varied effects of (a) X on Y, (b) C1 on Y, (c) U on Y.
Additional file 15 of A novel method for controlling unobserved confounding using double confounders
Creators: name: Liu, Lu
name: Hou, Lei
name: Yu, Yuanyuan
name: Liu, Xinhui
name: Sun, Xiaoru
name: Yang, Fan
name: Wang, Qing
name: Jing, Ming
name: Xu, Yeping
name: Li, Hongkai
name: Xue, Fuzhong
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 15 : Figure S12. The Simulation D1 result. Results shows the estimated biases, SE and MSE from the 3 models for varied effects of (a) X on Y, (b) C1 on Y, (c) U on Y.
องค์ประกอบชนิดและความหนาแน่นของแพลงก์ตอนพืชบริเวณกระชังเลี้ยงปลานิลในลุ่มน้ำชีตอนกลาง กรณีศึกษาบริเวณจังหวัดมหาสารคาม
Creators: name: วิภาวี ไทเมืองพล
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: แพลงก์ตอนพืช, ปลานิล, กระชังเลี้ยงปลา

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
On two approaches to the third-order solution of surface gravity waves
Creators: name: Gao, Zhe
name: Sun, Z. C
name: Liang, S. X
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Third-order approximate solutions for surface gravity waves in the finite water depth are studied in the context of potential flow theory. This solution provides explicit expressions for the surface elevation, free-surface velocity potential and velocity potential. The amplitude dispersion relation is also provided. Two approaches are used to derive the third order analytical solution, resulting in two types of approximate solutions: the perturbation solution and the Hamiltonian solution. The perturbation solution is obtained by classical perturbation technique in which the time variable is expanded in multiscale to eliminate secular terms. The Hamiltonian solution is derived from the canonical transformation in the Hamiltonian theory of water waves. By comparing the two types of solutions, it is found that they are completely equivalent for the first to second order solutions and the nonlinear dispersion, but for the third order part only the sum-sum terms are the same. Due to the canonical transformation that could completely separate the dynamic and bound harmonics, the Hamiltonian solutions break through the difficulty that the perturbation theory breaks down due to singularities in the transfer functions when quartet resonance criterion is satisfied. Furthermore, it is also found that some time-averaged quantities based on the Hamiltonian solution, such as mean potential energy and mean kinetic energy, are equal to those in the initial state in which sea surface is assumed to be a Gaussian random process. This is because there are associated conserved quantities in the Hamiltonian form. All of these show that the Hamiltonian solution is more reasonable and accurate to describe the third order steady-state wave field. Finally, based on the Hamiltonian solution, some statistics are given such as the volume flux, skewness, and excess kurtosis.
A Distributed Population of Low Mass Pre-Main Sequence Stars near the Taurus Molecular Clouds
Creators: name: Slesnick, Catherine L.
name: Carpenter, John M.
name: Hillenbrand, Lynne A.
name: Mamajek, Eric E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a drift scan survey covering a ~5 deg by 50 deg region toward the southern portion of the Taurus-Auriga molecular cloud. Data taken in the B,R,I filters with the Quest-2 camera on the Palomar 48-inch telescope were combined with 2MASS near-infrared photometry to select candidate young stars. Follow-up optical spectroscopy of 190 candidates led to identification of 42 new low mass pre-main sequence stars with spectral types M4-M8, of which approximately half exhibit surface gravity signatures similar to known Taurus stars while the other half exhibit surface gravity signatures similar to members of the somewhat older Upper Sco, TW Hya and Beta Pic associations. The pre-main sequence stars are spread over ~35 deg, and many are located well outside of previously explored regions. From assessment of the spatial and proper motion distributions, we argue that the new pre-main sequence stars identified far from the clouds cannot have originated from the vicinity of the 1-2 Myr-old subclusters which contain the bulk of the identified Taurus members, but instead represent a newly-identified area of recent star-formation near the clouds.
description: Accepted for publication in AJ. 13 pages including 9 figures (2 in color) and 1 table. A separate file tabA1.ps contains a hard copy of a second table which will be published in electronic form only
Hidden Quantum Gravity in 3d Feynman diagrams
Creators: name: Baratin, Aristide
name: Freidel, Laurent
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we show that 3d Feynman amplitudes of standard QFT in flat and homogeneous space can be naturally expressed as expectation values of a specific topological spin foam model. The main interest of the paper is to set up a framework which gives a background independent perspective on usual field theories and can also be applied in higher dimensions. We also show that this Feynman graph spin foam model, which encodes the geometry of flat space-time, can be purely expressed in terms of algebraic data associated with the Poincare group. This spin foam model turns out to be the spin foam quantization of a BF theory based on the Poincare group, and as such is related to a quantization of 3d gravity in the limit where the Newton constant G_N goes to 0. We investigate the 4d case in a companion paper where the strategy proposed here leads to similar results.
description: 35 pages, 4 figures, some comments added
การพัฒนาเครื่องเคลือบและม้วนสำหรับผลิตไหมขัดฟันธรรมชาติ
Creators: name: ศิริลักษณ์ วงศ์เกษม
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: ไหมขัดฟัน, การเคลือบ, การม้วน, การตีเกลียว

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
The feasibility of a Floating Vertical Raceway for salmon smolt production in British Columbia
Creators: name: Neufeld, Trev
Publisher: name: University of British Columbia
Year: 2010

description: In British Columbia the Floating Vertical Raceway (FVR) system has only recently been introduced as a technique to produce low cost salmonid smolts. A FVR is constructed of synthetic rubber sheeting and may be assembled at, and/or within, an existing off-shore marine net pen. The FVR is filled with freshwater or varying proportions of freshwater/saltwater and thereby floats on the denser saltwater. Mixed results have shown that inconsistent and unreliable designs can prevent successful application of the FVR systems. The design problems are generally associated with stability and turgidity of the raceway. In this study a computer generated spreadsheet simulation (CGSS) was developed to predict the technical and economic feasibility of 3 FVR scenarios through several production cycles. The program provides a tool to assist producers, investors and banks to assess the technical and economic feasibility of a FVR system. An analysis of the CGSS behaviour provides valuable insights for prospective operators and farmers. Results indicate that for a FVR with a volume of 100 m3 influent water flow rates of 150, 300 and 600 1/min will incur oxygen deficiencies at 160, 180 and 210 days into a production cycle, respectively. Flow rates higher than 2000 1/min raise the fresh water head order of magnitudes above the observed heights of 0.01-0.3 m. The added force of this water could cause the investigated liner and outlet screen to fail. A FVR shaped as either a frustrum, hemisphere, paraboloid, or cuboid, adheres to stability criteria. Turgor is maintained for these four shapes as long as the current velocity is not greater than 1.1, 1.6, 1.2 and 1.15 m/s, respectively. After criteria for technical feasibility were determined, economic feasibility was investigated. To obtain a ten year cash flow, it was assumed that the initial selling price of an Atlantic salmon smolt was $3.50. For one of the three hypothetical farm cases examined, net cash flow remained positive throughout all cycles and a surplus was accumulated. One hypothetical farm failed due to the low number of stocked smolts. The final hypothetical farm maintained a positive cash flow through most cycles but accumulated a deficit due to the large capital costs of PVC piping (45.32%). The lowest production cost of a smolt was $1.37. Conclusions from test simulations on the CGSS indicate that the FVR system is technically and economically feasible. The spreadsheet developed during this investigation is concluded to be an effective tool to investigate alternative strategies, designs and economies for smolt production within a FVR.
Collage for Sustainable Housing Development- Learning and Reflecting through Collaboration, Document Analysis and Collage
Creators: name: McCandlish, Alison
Publisher: name: figshare
Year: 2021
Subjects: subject: 120599 Urban and Regional Planning not elsewhere classified
subject: FOS: Social and economic geography
subject: 120508 Urban Design
subject: 120101 Architectural Design
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 130108 Technical, Further and Workplace Education
subject: FOS: Educational sciences
subject: 130313 Teacher Education and Professional Development of Educators

description: This resource introduces ways of using collage as a technique to encourage reflection on sustainable development goals, specifically SDG7 and SDG9.
This was developed as a tutorial for a postgraduate course at the University of Glasgow (Sustainable Housing Development).
สมรรถนะการผลิตและผลตอบแทนทางเศรษฐกิจของไก่ลูกผสมพื้นเมือง(ชี)
Creators: name: ดวงนภา พรมเกตุ
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: สมรรถนะการผลิต, ผลตอบแทนทางเศรษฐกิจ, ไก่ลูกผสมพื้นเมือง

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
การเตรียมอนุภาคไมโครของพอลิดี,แอล-แล็กไทด์ผสมกรดเสตียริกที่สลายตัวได้ทางชีวภาพโดยวิธีการระเหยตัวทำละลายของอิมัลชันแบบน้ำมันในน้ำสำหรับนำส่งยา
Creators: name: บรรพรต แขวงภูเขียว
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: พอลิเมอร์สลายตัวได้ทางชีวภาพ, พอลิเมอร์ผสม, อนุภาคไมโคร, สัณฐานวิทยา

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
การยอมรับไก่ลูกผสมพื้นเมืองพันธุ์ชีในสภาพการเลี้ยงแบบเกษตรกร
Creators: name: ขนิษฐา เรืองวิทยานุสรณ์
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: ไก่ลูกผสมพื้นเมือง, ต้นทุน, การทดลองในพื้นที่

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Biased random-to-top shuffling
Creators: name: Jonasson, Johan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G99, 60J99 (Primary)

description: Recently Wilson [Ann. Appl. Probab. 14 (2004) 274--325] introduced an important new technique for lower bounding the mixing time of a Markov chain. In this paper we extend Wilson's technique to find lower bounds of the correct order for card shuffling Markov chains where at each time step a random card is picked and put at the top of the deck. Two classes of such shuffles are addressed, one where the probability that a given card is picked at a given time step depends on its identity, the so-called move-to-front scheme, and one where it depends on its position. For the move-to-front scheme, a test function that is a combination of several different eigenvectors of the transition matrix is used. A general method for finding and using such a test function, under a natural negative dependence condition, is introduced. It is shown that the correct order of the mixing time is given by the biased coupon collector's problem corresponding to the move-to-front scheme at hand. For the second class, a version of Wilson's technique for complex-valued eigenvalues/eigenvectors is used. Such variants were presented in [Random Walks and Geometry (2004) 515--532] and [Electron. Comm. Probab. 8 (2003) 77--85]. Here we present another such variant which seems to be the most natural one for this particular class of problems. To find the eigenvalues for the general case of the second class of problems is difficult, so we restrict attention to two special cases. In the first case the card that is moved to the top is picked uniformly at random from the bottom $k=k(n)=o(n)$ cards, and we find the lower bound $(n^3/(4π^2k(k-1)))\log n$. Via a coupling, an upper bound exceeding this by only a factor 4 is found. This generalizes Wilson's [Electron. Comm. Probab. 8 (2003) 77--85] result on the Rudvalis shuffle and Goel's [Ann. Appl. Probab. 16 (2006) 30--55] result on top-to-bottom shuffles. In the second case the card moved to the top is, with probability 1/2, the bottom card and with probability 1/2, the card at position $n-k$. Here the lower bound is again of order $(n^3/k^2)\log n$, but in this case this does not seem to be tight unless $k=O(1)$. What the correct order of mixing is in this case is an open question. We show that when $k=n/2$, it is at least $Θ(n^2)$.
description: Published at http://dx.doi.org/10.1214/10505160600000097 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Strong lensing statistics and the power spectrum normalisation
Creators: name: Fedeli, C.
name: Bartelmann, M.
name: Meneghetti, M.
name: Moscardini, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use semi-analytic modelling of the galaxy-cluster population and its strong lensing efficiency to explore how the expected abundance of large gravitational arcs on the sky depends on $σ_8$. Our models take all effects into account that have been shown to affect strong cluster lensing substantially, in particular cluster asymmetry, substructure, merging, and variations in the central density concentrations. We show that the optical depth for long and thin arcs increases by approximately one order of magnitude when $σ_8$ increases from 0.7 to 0.9, owing to a constructive combination of several effects. Models with high $σ_8$ are also several orders of magnitude more efficient in producing arcs at intermediate and high redshifts. Finally, we use realistic source number counts to quantitatively predict the total number of arcs brighter than several magnitude limits in the R and I bands. We confirm that, while $σ_8\sim0.9$ may come close to the known abundance of arcs, even $σ_8\sim0.8$ falls short by almost an order of magnitude in reproducing known counts. We conclude that, should $σ_8\sim0.8$ be confirmed, we would fail to understand the strong-lensing efficiency of the galaxy cluster population, and in particular the abundance of arcs in high-redshift clusters. We argue that early-dark energy or non-Gaussian density fluctuations may indicate one way out of this problem.
description: 12 pages, 12 figures. A&A accepted
Simple Theoretical Models for Resonant Cold Atom Interactions
Creators: name: Julienne, Paul S.
name: Gao, Bo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Magnetically tunable scattering resonances have been used with great success for precise control of s-wave scattering lengths in ultracold atomic collisions. We describe relatively simple yet quite powerful analytic treatments of such resonances based on the analytic properties of the van der Waals long range potential. This theory can be used to characterize a number of properties of specific resonances that have been used successfully in various experiments with $^{87}$Rb, $^{85}$Rb, $^{40}$K, and $^{6}$Li. Optical Feshbach resonances are also possible and may be practical with narrow intercombination line photoassociative transitions in species like Sr and Yb.
description: To be published in the Proceedings of the 20th International Conference on Atomic Physics, held in Innsbruck, Austria, July 2006
New method for studying steady states in quantum impurity problems: The interacting resonant level model
Creators: name: Doyon, Benjamin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a new perturbative method for studying any steady states of quantum impurities, in or out of equilibrium. We show that steady-state averages are completely fixed by basic properties of the steady-state (Hershfield's) density matrix along with dynamical "impurity conditions". This gives the full perturbative expansion without Feynman diagrams (matrix products instead are used), and "re-sums" into an equilibrium average that may lend itself to numerical procedures. We calculate the universal current in the interacting resonant level model (IRLM) at finite bias V to first order in Coulomb repulsion U for all V and temperatures. We find that the bias, like the temperature, cuts off low-energy processes. In the IRLM, this implies a power-law decay of the current at large V (also recently observed by Boulat and Saleur at some finite value of U).
description: 4 pages, 1 figure. v2: title and abstract modified, more discussion in paper, reference added
Scale-free networks with a large- to hypersmall-world transition
Creators: name: Holme, Petter
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Recently there have been a tremendous interest in models of networks with a power-law distribution of degree -- so called "scale-free networks." It has been observed that such networks, normally, have extremely short path-lengths, scaling logarithmically or slower with system size. As en exotic and unintuitive example we propose a simple stochastic model capable of generating scale-free networks with linearly scaling distances. Furthermore, by tuning a parameter the model undergoes a phase transition to a regime with extremely short average distances, apparently slower than log log N (which we call a hypersmall-world regime). We characterize the degree-degree correlation and clustering properties of this class of networks.
description: errors fixed, one new figure, to appear in Physica A
Lattice fermions with complex mass
Creators: name: Durr, Stephan
name: Hoelbling, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present evidence in the Schwinger model that rooted staggered fermions may correctly describe the m<0 sector of a theory with an odd number of flavors. We point out that in QCD-type theories with a complex-valued quark mass every non-chiral action essentially "borrows" knowledge about the theta-transformation properties from the overlap action.
description: 8 pages, 4 figures. v2: eqn. (20) corrected, figs. 3,4 adjusted, conclusions unchanged. v3: text improved, 2 refs. added (version to appear in PRD)
Crystallization kinetics of sodium sulphate from 9N sulphuric acid solution
Creators: name: Nyakiamo, Anthony P.
Publisher: name: University of British Columbia
Year: 2010

description: The crystallization kinetics of sodium sulphate from 9N sulphuric acid was studied under cooling conditions. The crystal growth and nucleation rates were determined using the Population Balance concept in a continuous mixed-suspension mixed-product-removal (MSMPR) crystallizer. The effects of supersaturation, crystal suspension density and temperature on the crystallization kinetics were all investigated. The study was conducted at crystallizer temperatures of 45, 50, 55, and 60 °C. The crystal growth rate data were correlated to the supersaturation with a power-law, G = KGSg. The crystal nucleation rate data were fitted to both primary (B° = KBSb) and secondary (B° = KNMTjSu) nucleation models. Growth and nucleation rate data were correlated according to the primary (B° = KbGi) and secondary (B° = KnMTjGv) relative kinetic models. The study determined that the growth rate data fit the expression, (G = KGS⁰‧⁸⁷ ), and that secondary nucleation was the dominant mode of nuclei generation (B° = KNMT⁰‧⁸⁴S¹‧²⁷). The sodium sulphate crystallizes from solution as the acid salt, sodium sesqui-sulphate (Na₃HSO₄) . The rate constants, KG and KN, were both functions of temperature and were fitted to Arrhenius type expressions : [formula omitted]
From QCD to nuclear matter saturation
Creators: name: Ericson, M.
name: Chanfray, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss a relativistic chiral theory of nuclear matter with $σ$ and $ω$ exchange using a formulation of the $σ$ model in which all the chiral constraints are automatically fulfilled. We establish a relation between the nuclear response to the scalar field and the QCD one which includes the nucleonic parts. It allows a comparison between nuclear and QCD information. Going beyond the mean field approach we introduce the effects of the pion loops supplemented by the short-range interaction. The corresponding Landau-Migdal parameters are taken from spin-isospin physics results. The parameters linked to the scalar meson exchange are extracted from lattice QCD results. These inputs lead to a reasonable description of the saturation properties, illustrating the link between QCD and nuclear physics. We also derive from the corresponding equation of state the density dependence of the quark condensate and of the QCD susceptibilities.
description: Talk given by M. Ericson at the Yukawa International Seminar (YKIS) 2006 "New frontiers in QCD", Kyoto, Japon
Additional file 13 of A novel method for controlling unobserved confounding using double confounders
Creators: name: Liu, Lu
name: Hou, Lei
name: Yu, Yuanyuan
name: Liu, Xinhui
name: Sun, Xiaoru
name: Yang, Fan
name: Wang, Qing
name: Jing, Ming
name: Xu, Yeping
name: Li, Hongkai
name: Xue, Fuzhong
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 13 : Figure S10. The Simulation C2 result. Results shows the estimated biases, SE and MSE from the 3 models for varied effects of (a) the correlation between X and C1, (b) the correlation between C1 and C2.