cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Topological Hall effect arising from the mesoscopic and microscopic non-coplanar magnetic structure in MnBi
Creators: name: He, Yangkun
name: Schneider, Sebastian
name: Helm, Toni
name: Gayles, Jacob
name: Wolf, Daniel
name: Soldatov, Ivan
name: Borrmann, Horst
name: Schnelle, Walter
name: Schaefer, Rudolf
name: Fecher, Gerhard H.
name: Rellinghaus, Bernd
name: Felser, Claudia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The topological Hall effect (THE), induced by the Berry curvature, which originates from non-zero scalar spin chirality, is an important feature for mesoscopic topological structures, such as skyrmions. However, the THE might also arise from other microscopic non-coplanar spin structures in the lattice. Thus, the origin of the THE inevitably needs to be determined to fully understand skyrmions and find new host materials. Here, we examine the Hall effect in both bulk- and micron-sized lamellar samples of MnBi. The sample size affects the temperature and field range in which the THE is detectable. Although bulk sample exhibits the THE only upon exposure to weak fields in the easy-cone state, in thin lamella the THE exists across a wide temperature range and occurs at fields near saturation. Our results show that both the non-coplanar spin structure in the lattice and topologically non-trivial skyrmion bubbles are responsible for the THE, and that the dominant mechanism depends on the sample size. Hence, the magnetic phase diagram for MnBi is strongly size-dependent. Our study provides an example in which the THE is simultaneously induced by two mechanisms, and builds a bridge between mesoscopic and microscopic magnetic structures.
ความสำคัญ ปัญหาและอุปสรรคของการจัดทำ "การวิเคราะห์และคำอธิบายของฝ่ายจัดการ (MD&A)"
Creators: name: สันสกฤต วิจิตรเลขการ
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: การวิเคราะห์และคําอธิบายของฝายจัดการ, การเปิดเผยข้อมูล, แบบ 56-1

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
Interface dependence of the Josephson-current fluctuations in short SNS junctions
Creators: name: Micklitz, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss the dependence of the Josephson current correlations in mesoscopic superconductor/normal-conductor/superconductor (SNS) devices on the transparency of the superconductor/normal-conductor (SN) interfaces. Focusing on short junctions we apply the supersymmetry method to construct an effective field theory for mesoscopic SNS devices which is evaluated in the limit of highly and weakly transparent interfaces. We show that the two-point Josephson-current correlator differs by an universal factor 2 in these two cases.
description: 5 pages, 1figure, version accepted by PRB
Single-shot fabrication of semiconducting-superconducting nanowire devices
Creators: name: Borsoi, Francesco
name: Mazur, Grzegorz P.
name: van Loo, Nick
name: Nowak, Michał P.
name: Bourdet, Léo
name: Li, Kongyi
name: Korneychuk, Svetlana
name: Fursina, Alexandra
name: Memisevic, Elvedin
name: Badawy, Ghada
name: Gazibegovic, Sasa
name: van Hoogdalem, Kevin
name: Bakkers, Erik P. A. M.
name: Kouwenhoven, Leo P.
name: Heedt, Sebastian
name: Quintero-Pérez, Marina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Semiconducting-superconducting nanowires attract widespread interest owing to the possible presence of non-abelian Majorana zero modes, which hold promise for topological quantum computation. However, the search for Majorana signatures is challenging because reproducible hybrid devices with desired nanowire lengths and material parameters need to be reliably fabricated to perform systematic explorations in gate voltages and magnetic fields. Here, we exploit a fabrication platform based on shadow walls that enables the in-situ, selective and consecutive depositions of superconductors and normal metals to form normal-superconducting junctions. Crucially, this method allows to realize devices in a single shot, eliminating fabrication steps after the synthesis of the fragile semiconductor/superconductor interface. At the atomic level, all investigated devices reveal a sharp and defect-free semiconducting-superconducting interface and, correspondingly, we measure electrically a hard induced superconducting gap. While our advancement is of crucial importance for enhancing the yield of complex hybrid devices, it also offers a straightforward route to explore new material combinations for hybrid devices.
Relativistic Flows After Shock Emergence
Creators: name: Kikuchi, Reina
name: Shigeyama, Toshikazu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate relativistic flows after a shock wave generated in a star arrives at the surface. First, the sphericity effect is involved through a successive approximation procedure by adding correction terms to an already known self-similar solution in the ultra-relativistic limit assuming the plane parallel geometry. We also find that the involvement of sphericity increases the acceleration in the early phase as compared with that of the original plane-parallel flow. Second, we obtain semi-analytic solutions for a mildly relativistic flow in which the rest mass energy density is not negligible in the equation of state. To take into account this, we use the enthalpy and the pressure instead of using the density and the pressure as thermodynamic variables. These solutions assume self-similar evolutions except for the initial conditions. Third, we have carried out numerical calculations with a special-relativistic hydrodynamical code based on the Godunov method in order to check the applicability of the above sphericity corrections and the semi-analytic solutions. The equation of state used in our calculations includes the rest mass energy density. Comparisons with results of numerical calculations support the validity of the sphericity correction terms. The evolutions of the pressure and the Lorentz factor of each fluid element of the semi-analytic solution for mildly relativistic flows match the numerical results at least in early phases. We also investigate the final free expansion phases by this code. We have derived the final energy distributions for these flows and compare them with previous works.
description: 10 pages, 9 figures, to appear in ApJ
Bible Politics: Denial, Division, & Exclusion in the 19th Century Religious Publishing Industry
Creators: name: Faust, Aiden
Publisher: name: Maryland Shared Open Access Repository
Year: 2013
Subjects: Religious publishing industry, African American history, American Bible Society, American Tract Society

description: My essay considers the question, “When did people of African descent in the New World begin to own personal copies of the Christian Bible?” This question focuses on the widespread distribution of Bibles by Evangelical Christians throughout the nineteenth century and considers the politics of African American access to information. The essay appears in the exhibition catalog for "Ashe to Amen: African Americans and Biblical Imagery,” which was exhibited at the Museum of Biblical Art, the Reginald F. Lewis Museum of Maryland African American History & Culture, and the Dixon Gallery and Gardens 2013-2014.
A Possible Mechanism for Production of Primordial Black Holes
Creators: name: Nozari, Kourosh
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Primordial Black Hole Remnants(PBHRs) can be considered as a primary source of cold dark matter. Hybrid inflation provides a possible framework for production of primordial black holes(PBHs) and these PBHs evaporate subsequently to produce PBHRs. In this paper we provide another framework for production of these PBHs. Using signature changing cosmological model and the generalized uncertainty principle as our primary inputs, first we find a geometric cosmological constant for early stage of universe evolution. This geometric cosmological constant can lead to heavy vacuum density which may be interpreted as a source of PBHs production during the inflationary phase. In the next step, since it is possible in general to have non-vanishing energy-momentum tensor for signature changing hypersurface, this non-vanishing energy-momentum tensor can be considered as a source of PBHs production. These PBHs then evaporate via the Hawking process to produce PBHRs. Finally, possible observational schemes for detecting relics of these PBHRs are discussed.
description: 14 pages, 3 figures
Features of Excess Conductivity Behavior in a Magnetic Superconductor Dy$_{0.6}$Y$_{0.4}$Rh$_{3.85}$Ru$_{0.15}$B$_4$
Creators: name: Solovjov, A. L.
name: Terekhov, A. V.
name: Petrenko, E. V.
name: Omelchenko, L. V.
name: Cuiping, Zhang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The temperature dependencies of the excess conductivity $σ'(T)$ and possible pseudogap (PG), in a Dy$_{0.6}$Y$_{0.4}$Rh$_{3.85}$Ru$_{0.15}$B$_4$ polycrystal were studied for the first time. It was shown that $σ'(T)$ near T$_{c}$ is well described by the Aslamazov Larkin fluctuation theory, demonstrating a crossover with increasing temperature. Using the crossover temperature $T_0$, the coherence length along the c axis $ξ_c(0)$, was determined. Above the level of $T_{2D}>T_{0}$, an unusual dependence $σ'(T)$ was found, which is not described by the fluctuation theories in the range from $T_{0}$ to $T_{FM}$, at which a ferromagnetic transition occurs. The range in which superconducting fluctuations exist is apparently quite narrow and amounts to $ΔT_{fl}=2.8 K$. The resulting temperature dependence of the PG parameter $Δ^*(T)$ has the form typical of magnetic superconductors with features at $T_{max}=154 K$ and the temperature of a possible structural transition at $T_{s}=95 K$. Below $T_{s}$, dependence $Δ^*{T}$ has a shape typical for PG in cuprates, which suggests that the PG state can be realized in Dy$_{0.6}$Y$_{0.4}$Rh$_{3.85}$Ru$_{0.15}$B$_4$ in this temperature range. Comparison of $Δ^*(T)$ with the Peters Bauer theory made it possible to determine the density of local pairs ~0.35, near T$_{c}$, which is 1.17 times greater than in optimally doped YBa$_{2}$Cu$_{3}$O$_{7-δ}$ single crystals.
description: 10 pages, 7 figures
Hughie Lee-Smith Chronology
Creators: name: Faust, Aiden
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: Art history, Modernism, African American history, Biography

description: Painter Hughie Lee-Smith (1915-1999) was an American painter who grew up during the Great Depression and was an active member of arts communities in  Cleveland, Detroit, and Chicago. Lee-Smith was influenced by the Harlem Renaissance and participated in the Works Progress Administration/Federal Art Project. The chronology of the artist’s life draws from archival research that utilized Lee-Smith’s personal papers.
Quantizations of generalized-Witt algebra and of Jacobson-Witt algebra in the modular case
Creators: name: Hu, Naihong
name: Wang, Xiuling
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B37;17B62;17B50

description: We quantize the generalized-Witt algebra in characteristic 0 with its Lie bialgebra structures discovered by Song-Su (\cite{GY}). Via a modulo p reduction and a modulo "p-restrictedness" reduction process, we get 2^n{-}1 families of truncated p-polynomial noncocommutative deformations of the restricted universal enveloping algebra of the Jacobson-Witt algebra \mathbf{W}(n;\underline{1}) (for the Cartan type simple modular restricted Lie algebra of W type). They are new families of noncommutative and noncocommutative Hopf algebras of dimension p^{1+np^n} in characteristic p. Our results generalize a work of Grunspan (J. Algebra 280 (2004), 145--161, \cite{CG}) in rank n=1 case in characteristic 0. In the modular case, the argument for a refined version follows from the modular reduction approach (different from \cite{CG}) with some techniques from the modular Lie algebra theory.
description: 24 pages; final revised version. Journal of Algebra (to appear)
Dirac imprints on the $g$-factor anisotropy in graphene
Creators: name: Prada, Marta
name: Tiemann, Lars
name: Sichau, Jonas
name: Blick, Robert H
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Dirac electrons in graphene are to lowest order spin 1/2 particles, owing to the orbital symmetries at the Fermi level. However, anisotropic corrections in the $g$-factor appear due to the intricate spin-valley-orbit coupling of chiral electrons. We resolve experimentally the $g$-factor along the three orthogonal directions in a large-scale graphene sample. We employ a Hall bar structure with an external magnetic field of arbitrary direction, and extract the effective $g$-tensor via resistively-detected electron spin resonance. We employ a theoretical perturbative approach to identify the intrinsic and extrinsic spin orbit coupling and obtain a fundamental parameter inherent to the atomic structure of $^{12}$C, commonly used in ab-initio models.
description: 5 pages, 4 figures
Magnetic Exchange Interactions in the Molecular Nanomagnet Mn$_{12}$
Creators: name: Chiesa, A.
name: Guidi, T.
name: Carretta, S.
name: Ansbro, S.
name: Timco, G. A.
name: Vitorica-Yrezabal, I.
name: Garlatti, E.
name: Amoretti, G.
name: Winpenny, R. E. P.
name: Santini, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The discovery of magnetic bistability in Mn$_{12}$ more than 20 years ago marked the birth of molecular magnetism, an extremely fertile interdisciplinary field and a powerful route to create tailored magnetic nanostructures. However, the difficulty to determine interactions in complex polycentric molecules often prevents their understanding. Mn$_{12}$ is an outstanding example of this difficulty: although it is the forefather and most studied of all molecular nanomagnets, an unambiguous determination of even the leading magnetic exchange interactions is still lacking. Here we exploit four-dimensional inelastic neutron scattering to portray how individual spins fluctuate around the magnetic ground state, thus fixing the exchange couplings of Mn$_{12}$ for the first time. Our results demonstrate the power of four-dimensional inelastic neutron scattering as an unrivaled tool to characterize magnetic clusters.
Magnetic Percolation and the Phase Diagram of the Disordered RKKY model
Creators: name: Priour, D. J.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider ferromagnetism in spatially randomly located magnetic moments, as in a diluted magnetic semiconductor, coupled via the carrier-mediated indirect exchange RKKY interaction. We obtain via Monte Carlo the magnetic phase diagram as a function of the impurity moment density $n_{i}$ and the relative carrier concentration $n_{c}/n_{i}$. As evidenced by the diverging correlation length and magnetic susceptibility, the boundary between ferromagnetic (FM) and non-ferromagnetic (NF) phases constitutes a line of zero temperature critical points which can be viewed as a magnetic percolation transition. In the dilute limit, we find that bulk ferromagnetism vanishes for $n_{c}/n_{i}>.1$. We also incorporate the local antiferromagnetic direct superexchange interaction between nearest neighbor impurities, and examine the impact of a damping factor in the RKKY range function.
description: 5 pages, 3 figures; figure formatting modified, typos fixed
Canonical formalism and quantization of perturbative sector of higher-derivative theories
Creators: name: Andrzejewski, K.
name: Bolonek, K.
name: Gonera, J.
name: Maslanka, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The theories defined by Lagrangians containing second time derivative are considered. It is shown that if the second derivatives enter only the terms multiplied by coupling constant one can consistently define the perturbative sector via Dirac procedure. The possibility of introducing standard canonical variables is analysed in detail. The ambiguities in quantization procedure are pointed out.
description: 16 pages, no figures
K-band transit and secondary eclipse photometry of exoplanet OGLE-TR-113b
Creators: name: Snellen, I. A. G.
name: Covino, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high precision K-band photometry of the transit and secondary eclipse of extrasolar planet OGLE-TR-113, using the SOFI near-infrared instrument on ESO's NTT. Data were taken in 5 second exposures over two periods of 3-4 hours, using random jitter position offsets. In this way, a relative photometric precision of ~1% per frame was achieved, avoiding systematic effects that seem to become dominant at precisions exceeding this level, and resulting in an overall accuracy of 0.1% per ~10 minutes. The observations of the transit show a flat bottom light-curve indicative of a significantly lower stellar limb-darkening at near-infrared than at optical wavelengths. The observations of the secondary eclipse result in a 3 sigma detection of emission from the exoplanet at 0.17+-0.05%. However, residual systematic errors make this detection rather tentative.
description: 6 pages, 7 figures: MNRAS accepted
Single molecule pulling with large time steps
Creators: name: Oberhofer, Harald
name: Dellago, Christoph
name: Boresch, Stefan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recently, we presented a generalisation of the Jarzynski non-equilibrium work theorem for phase space mappings. The formalism shows that one can determine free energy differences from approximate trajectories obtained from molecular dynamics simulations in which very large timesteps are used. In this work we test the method by simulating the force induced unfolding of a deca-alanine helix in vacuum. The excellent agreement between results obtained with a small, conservative time step of 0.5 fs and results obtained with a time step of 3.2 fs (i.e., close to the stability limit) indicates that the large time step approach is practical for such complex biomolecules. We further adapt the method of Hummer and Szabo for the simulation of single-molecule force spectroscopy experiments to the large time step method. While trajectories generated with large steps are approximate and may be unphysical - in the simulations presented here we observe a violation of the equipartition theorem - the computed free energies are exact in principle. In terms of efficiency, the optimum time step for the unfolding simulations lies in the range 1-3 fs.
description: 8 pages, 8 figures
Tribaryons in a constituent quark model
Creators: name: Park, Aaron
name: Lee, Su Houng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the matrix elements of the color-spin interaction for all possible multi-quark states of tribaryons in flavor SU(3) broken case. For that purpose, we construct the flavor$\otimes$color$\otimes$spin wave functions of the tribaryons, which are taken to be antisymmetric to satisfy the Pauli exclusion principle. Furthermore, we analyze the diquark structure of the tribaryon configurations using the symmetric and antisymmetric basis set of flavor, color and spin states.
description: 13 pages
Quantum Communication through Spin Chain Dynamics: an Introductory Overview
Creators: name: Bose, Sougato
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present an introductory overview of the use of spin chains as quantum wires, which has recently developed into a topic of lively interest. The principal motivation is in connecting quantum registers without resorting to optics. A spin chain is a permanently coupled 1D system of spins. When one places a quantum state on one end of it, the state will be dynamically transmitted to the other end with some efficiency if the spins are coupled by an exchange interaction. No external modulations or measurements on the body of the chain, except perhaps at the very ends, is required for this purpose. For the simplest (uniformly coupled) chain and the simplest encoding (single qubit encoding), however, dispersion reduces the quality of transfer. We present a variety of alternatives proposed by various groups to achieve perfect quantum state transfer through spin chains. We conclude with a brief discussion of the various directions in which the topic is developing.
description: Material covered till Dec 2006
Stability Dust-Ion-Acoustic Wave in Dusty Plasmas With Stream -Influence of Charge Fluctuation of Dust Grains
Creators: name: Atamaniuk, Barbara
name: Zuchowski, Krzysztof
Publisher: name: arXiv
Year: 2007
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: There is a quickly increasing wealth of experimental data on so-called dusty plasmas i. e. ionized gases or usual plasmas that contain micron sized charged particles. Interest in these structures is driven both by their importance in many astrophysical as well as commercial situations. Among them are linear and nonlinear wave phenomena. We consider the influence of dust charge fluctuations on stability of the ion-acoustic waves when the stream of particles is present. It is assumed that all grains of dust have equal masses but charges are not constant in time-they may fluctuate in time. The dust charges are not really independent of the variations of the plasma potentials. All modes will influence the charging mechanism, and feedback will lead to several new interesting and unexpected phenomena. The charging of the grains depends on local plasma characteristics. If the waves disturb these characteristic, then charging of the grains is affected and the grain charge is modified, with a resulting feedback on the wave mode. In case considering here, when temperature of electrons is much greater then the temperature of the ions and temperature of electrons is not great enough for further ionization of the ions, we show that stability of the acoustic wave depends only one phenomenological coefficient.
description: 4 pages,Plasma 2005,Opole-Turawa, Poland, 6-9 september 2005
Deep Reinforcement Learning for Stock Portfolio Optimization
Creators: name: Hieu, Le Trung
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Optimization and Control (math.OC)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Economics and business

description: Stock portfolio optimization is the process of constant re-distribution of money to a pool of various stocks. In this paper, we will formulate the problem such that we can apply Reinforcement Learning for the task properly. To maintain a realistic assumption about the market, we will incorporate transaction cost and risk factor into the state as well. On top of that, we will apply various state-of-the-art Deep Reinforcement Learning algorithms for comparison. Since the action space is continuous, the realistic formulation were tested under a family of state-of-the-art continuous policy gradients algorithms: Deep Deterministic Policy Gradient (DDPG), Generalized Deterministic Policy Gradient (GDPG) and Proximal Policy Optimization (PPO), where the former two perform much better than the last one. Next, we will present the end-to-end solution for the task with Minimum Variance Portfolio Theory for stock subset selection, and Wavelet Transform for extracting multi-frequency data pattern. Observations and hypothesis were discussed about the results, as well as possible future research directions.1
Guide to Vision Mātauranga
Creators: name: Māngai, Rauika
Publisher: name: AgResearch
Year: 2024
Subjects: classificationCode: 4512
subject: Ngā pūtaiao Māori (Māori sciences)

description: The Guide to Vision Mātauranga was developed by the Rauika Māngai, an assembly of senior Māori representatives from across the National Science Challenges, for for the Aotearoa New Zealand science sector. It includes perspectives from Māori scientists, research leaders and programme managers.
ความพร้อมของบัญชีบัณฑิตไทยกับการทำงานที่ปรึกษาทางบัญชีในกลุ่มประเทศประชาคมอาเซียน ในมุมมองของสถาบันการศึกษา
Creators: name: เอกพล คงมา
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: ที่ปรึกษาทางบัญชี, ประชาคมอาเซียน, บัญชีบัณฑิต

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
การใช้ตัวชี้วัดผลการดำเนินงานทางการเงินและไม่ใช่ทางการเงินภายใต้ทฤษฎีการบริหาร
Creators: name: สุวิมล บัวทอง
name: ศิริลักษณ์ บางโชคดี
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: ตัวชี้วัดผลการดําเนินงานทางการเงิน, ตัวชี้วัดผลการดําเนินงานที่ไม่ใช่ทางการเงิน, ทฤษฎีการบริหารเชิงสถานการณ์

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
A triple star in disarray -- Multi-epoch observations of T Tauri with VLT-SPHERE and LBT-LUCI
Creators: name: Kasper, M.
name: Santhakumari, K. K. R.
name: Herbst, T. M.
name: van Boekel, R.
name: Menard, F.
name: Gratton, R.
name: van Holstein, R. G.
name: Langlois, M.
name: Ginski, C.
name: Boccaletti, A.
name: de Boer, J.
name: Delorme, P.
name: Desidera, S.
name: Dominik, C.
name: Hagelberg, J.
name: Henning, T.
name: Koehler, R.
name: Mesa, D.
name: Messina, S.
name: Pavlov, A.
name: Petit, C.
name: Rickman, E.
name: Roux, A.
name: Rigal, F.
name: Vigan, A.
name: Wahhaj, Z.
name: Zurlo, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: T Tauri remains an enigmatic triple star for which neither the evolutionary state of the stars themselves, nor the geometry of the complex outflow system is completely understood. Eight-meter class telescopes equipped with state-of-the-art adaptive optics provide the spatial resolution necessary to trace tangential motion of features over a timescale of a few years, and they help to associate them with the different outflows. We used J-, H-, and K-band high-contrast coronagraphic imaging with VLT-SPHERE recorded between 2016 and 2018 to map reflection nebulosities and obtain high precision near-infrared (NIR) photometry of the triple star. We also present molecular hydrogen emission maps of the 1-0 S(1) line at 2.122 micron obtained with LBT-LUCI during its commissioning period at the end of 2016. The data reveal a number of new features in the system, some of which are seen in reflected light and some are seen in H2 emission; furthermore, they can all be associated with the main outflows. The tangential motion of the features provides compelling evidence that T Tauri Sb drives the southeast-northwest outflow. T Tauri Sb has recently faded probably because of increased extinction as it passes through the southern circumbinary disk. While T Tauri Sb is approaching periastron, T Tauri Sa instead has brightened and is detected in all our J-band imagery for the first time.
description: 10 pages, 9 figures, accepted for publication in A&A
ผลกระทบของการเปิดเผยข้อมูลตามลำดับชั้นมูลค่ายุติธรรมของกิจการที่มีผลการดำเนินงานแตกต่างกันต่อวิจารณญาณของนักลงทุนทั่วไป
Creators: name: ดวงพร จันทร์เสงี่ยม
name: ศิลปพร ศรีจั่นเพชร
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: งานวิจัยเชิงทดลอง, มาตรฐานการรายงานทางการเงิน ฉบับที่ 13, การวัดมูลค่ายุติธรรม, ลําดับชั้นมูลค่ายุติธรรม, ความเชื่อถือได้, ความเกี่ยวของกับการตัดสินใจ, เงินลงทุนเผื่อขาย, กําไร (ขาดทุน) เบ็ดเสร็จอื่น

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
Lattice Abelian-Higgs model with noncompact gauge fields
Creators: name: Bonati, Claudio
name: Pelissetto, Andrea
name: Vicari, Ettore
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We consider a noncompact lattice formulation of the three-dimensional electrodynamics with $N$-component complex scalar fields, i.e., the lattice Abelian-Higgs model with noncompact gauge fields. For any $N\ge 2$, the phase diagram shows three phases differing for the behavior of the scalar-field and gauge-field correlations: the Coulomb phase (short-ranged scalar and long-ranged gauge correlations), the Higgs phase (condensed scalar-field and gapped gauge correlations), and the molecular phase (condensed scalar-field and long-ranged gauge correlations). They are separated by three transition lines meeting at a multicritical point. Their nature depends on the coexisting phases and on the number $N$ of components of the scalar field. In particular, the Coulomb-to-molecular transition line (where gauge correlations are irrelevant) is associated with the Landau-Ginzburg-Wilson $Φ^4$ theory sharing the same SU($N$) global symmetry but without explicit gauge fields. On the other hand, the Coulomb-to-Higgs transition line (where gauge correlations are relevant) turns out to be described by the continuum Abelian-Higgs field theory with explicit gauge fields. Our numerical study is based on finite-size scaling analyses of Monte Carlo simulations with $C^*$ boundary conditions (appropriate for lattice systems with noncompact gauge variables, unlike periodic boundary conditions), for several values of $N$, i.e., $N=2, 4, 10, 15$, and $25$. The numerical results agree with the renormalization-group predictions of the continuum field theories. In particular, the Coulomb-to-Higgs transitions are continuous for $N\gtrsim 10$, in agreement with the predictions of the Abelian-Higgs field theory.
description: 19 pages, 24 eps figures
Relativistic effects in quantum walks: Klein's paradox and Zitterbewegung
Creators: name: Kurzynski, Pawel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum walks are not only algorithmic tools for quantum computation but also not trivial models which describe various physical processes. The paper compares one-dimensional version of the free particle Dirac equation with discrete time quantum walk (DTQW). We show that the discretized Dirac equation when compared with DTQW results in interesting relations. It is also shown that two relativistic effects associated with the Dirac equation, namely Zitterbewegung (quivering motion) and Klein's paradox, are present in DTQW, which can be implemented within non-relativistic quantum mechanics.
description: 4 pages, 3 figures
ความสัมพันธ์ระหว่างการกำกับดูแลกิจการที่ดีกับการจัดการกำไรของบริษัทจดทะเบียนไทย กรณีบริษัทมีโครงสร้างของผู้ถือหุ้นแตกต่างกัน
Creators: name: ชวาลัย หม่อมบุญ
name: นิ่มนวล วิเศษสรรพ์
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: การกำกับดูแลกิจการ, โครงสร้างผู้ถือหุ้น, การจัดการกำไร

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
A Wai 262 Best Practice Guide for Science partnerships with Kaitiaki for Research Involving Taonga
Creators: name: Māngai, Rauika
Publisher: name: AgResearch
Year: 2024
Subjects: classificationCode: 4512
subject: Ngā pūtaiao Māori (Māori sciences)

description: This guide is to help scientists and researchers ensure they are informed and understand the complexities of the Wai 262 claim. This resource can help researchers develop respectful relationships with kaitiaki, where kaitiaki leadership of taonga aspects of science projects is upheld; move aside from leadership roles to ensure co-leadership across all aspects of science projects that do not involve taonga; co-design projects with kaitiaki; develop reciprocal and benefit-sharing relationships with kaitiaki that build capacity and capability; and develop a deep cultural understanding of how to be a 'good guest and a good host' and the porous boundaries between these standpoints.
Wai 262 is one of the most significant and far-reaching claims considered by the Waitangi Tribunal, and current work to resolve the issues it raised will affect everyone participating in science and research in Aotearoa. This pan-tribal claim covered key issues of misappropriation of mātauranga Māori through research process, the protection of Māori knowledge systems, the protection of native flora and fauna, and cultural intellectual property rights. The claim has been with us for 31 years and for many researchers and scientists, Māori and tangata tiriti too, the lack of practical guidance about what responsive and respectful research practice and science policy looks like remains elusive. Ngā Taonga Tuku Iho: Wai 262 and the Science System
Model inspired by population genetics to study fragmentation of brittle plates
Creators: name: Gomes, M. A. F.
name: de Oliveira, Viviane M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use a model whose rules were inspired by population genetics, the random capability growth model, to describe the statistical details observed in experiments of fragmentation of brittle platelike objects, and in particular the existence of (i) composite scaling laws, (ii) small critical exponents τassociated with the power-law fragment-size distribution, and (iii) the typical pattern of cracks. The proposed computer simulations do not require numerical solutions of the Newton's equations of motion, nor several additional assumptions normally used in discrete element models. The model is also able to predict some physical aspects which could be tested in new experiments of fragmentation of brittle systems.
description: We have modified the text in order to make the description of the model more clear. One Figure (Figure 1) was introduced showing the steps of the dynamics of colonization. Twelve references were added
Stochastic master equation for a probed system in a cavity
Creators: name: Nielsen, Anne E. B.
name: Molmer, Klaus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a detailed derivation of the stochastic master equation determining the time evolution of the state of a general quantum system, which is placed inside a cavity and subjected to indirect measurements by monitoring the state of electromagnetic radiation transmitted through the cavity. The derivation is based on the physics involved and the final result is stated in terms of the physical parameters of the setup. To illustrate the predictions contained in the equation, we solve it analytically for a specific system, and we demonstrate quantum jumps and freezing of the internal coherent dynamics of the system as a result of continued measurements.
description: 10 pages, 5 figures
2-aminooxazole in astrophysical environments: IR spectra and destruction cross sections for energetic processing
Creators: name: Maté, Belén
name: Carrasco-Herrera, Ricardo
name: Timón, Vicente
name: Tanarro, Isabel
name: Herrero, Victor J.
name: Carrascosa, Héctor
name: Caro, Guillermo M. Muñoz
name: González-Díaz, Cristóbal
name: Jiménez-Serra, Izaskun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: 2-aminooxazole (2AO), a N-heterocyclic molecule, has been proposed as an intermediate in prebiotic syntheses. It has been demonstrated that it can be synthesized from small molecules such as cyanamide and glycoaldehyde, which are present in interstellar space. The aim of this work is to provide infrared spectra, in the solid phase for conditions typical of astrophysical environments and to estimate its stability toward UV photons and cosmic rays. Infrared (4000-600 cm$^{-1}$) absorption spectra at 20 K, 180 K, and 300 K, IR band strengths, and room temperature UV (120-250 nm) absorption spectra are given for the first time for this species. Destruction cross-sections of 9.5 10$^{-18}$ cm$^2$ and 2 10$^{-16}$ cm$^2$ were found in the irradiation at 20 K of pure 2AO and 2AO:H$_2$O ices with UV (6.3-10.9 eV) photons or 5 keV electrons, respectively. These data were used for the estimate of half-life times for the molecule in different environments. It is estimated that 2AO could survive UV radiation and cosmic rays in the ice mantles of dense clouds beyond cloud collapse. In contrast, it would be very unstable at the surface of cold Solar System bodies like Kuiper belt objects, but the molecule could still survive within dust grain agglomerates or cometesimals.
description: 31 pages, 9 figures. Accepted to be published in The Astrophysical Journal
Cloud Computing: Overview and How to Audit
Creators: name: Lovepon Savaraj
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: Cloud computing, Cloud services

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
Subgap tunneling via quantum-interference effect: insulators and charge density waves
Creators: name: Duhot, S.
name: Mélin, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A quantum interference effect is discussed for subgap tunneling over a distance comparable to the coherence length, which is a consequence of ``advanced-advanced'' and ``retarded-retarded'' transmission modes [Altland and Zirnbauer, Phys. Rev. B 55, 1142 (1997)]. Effects typical of disorder are obtained from the interplay between multichannel averaging and higher order processes in the tunnel amplitudes. Quantum interference effects similar to those occurring in normal tunnel junctions explain magnetoresistance oscillations of a CDW pierced by nanoholes [Latyshev et al., Phys. Rev. Lett. 78, 919 (1997)], having periodicity h/2e as a function of the flux enclosed in the nanohole. Subgap tunneling is coupled to the sliding motion by charge accumulation in the interrupted chains. The effect is within the same trend as random matrix theory for normal metal-CDW hybrids [Visscher et al., Phys. Rev. B 62, 6873 (2000)]. We suggest that the experiment by Latyshev et al. probes weak localization-like properties of evanescent quasiparticles, not an interference effect related to the quantum mechanical ground state.
description: 13 pages, 11 figures, article rewritten, new section on wave-function matching
The Wall Street Journal Guide to Information Graphics: The Dos and Don'ts of Presenting Data, Facts, and Figures
Creators: name: ไพลิน ตรงเมธีรัตน์
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP
Splanchnic production of cytokines in porcine models of septic shock and mesenteric ischemia-reperfusion
Creators: name: Bathe, Oliver F.
Publisher: name: University of British Columbia
Year: 2009

description: Multiple organ dysfunction syndrome (MODS) is a lethal sequela of septic shock and may occur in association with intestinal ischemia and/or reperfusion. Its pathogenesis may be mediated by endogenous endotoxin and cytokines. It is postulated that, during septic shock and intestinal ischemia, translocation of endotoxin from the gut lumen to the portal circulation occurs and the gut and the liver are major sources of cytokines. Two experiments were performed to test these hypotheses. In the first experiment, differences in fluxes of endotoxin, tumor necrosis factor (TNF) and interleukin-6 (IL-6) across the gut and liver were determined over 4 h in animals given endotoxin (50 p-g/kg; N=6) and in control animals (N=6). At no time did gut efflux of cytokines or endotoxin exceed gut influx of these substances, in either control or septic animals. Moreover, at no time did hepatic influx and efflux of TNF and IL-6 differ in either group. Therefore, net gut production of LPS, TNF or IL-6 in this porcine model of septic shock was not demonstrated. Further, net production of TNF or IL-6 by the liver was not observed. In the second experiment, endotoxin, TNF and IL-6 levels were measured from the carotid artery, portal vein and hepatic vein every 30 minutes over 330 min in pigs, following occlusion of the superior mesenteric artery (SMA; N = 7) and following sham surgery (N = 7). In animals subjected to mesenteric ischemia, the SMA clamp was released twice: once at 240 min (for a duration of 40 s), and once at 300 min (for the remainder of the experiment). Gut efflux of TNF and IL-6 did not exceed gut influx, and hepatic influx of T N F and IL-6 was the same as hepatic efflux in both groups throughout the experiment. The temporal relationships of the appearances of TNF and IL-6 at the various vascular sites suggested TNF is produced in a partially perfused splanchnic bed (eg: pancreas, duodenum, liver, left colon) and IL-6 is produced in ischemic gut. There was no apparent splanchnic release of endotoxin secondary to mesenteric ischemia-reperfusion.
Physical characterization of S169: A prototypical IR bubble associated with the massive star-forming region IRAS12326-6245
Creators: name: Duronea, N. U.
name: Cichowolski, S.
name: Bronfman, L.
name: Mendoza, E.
name: Finger, R.
name: Suad, L. A.
name: Corti, M.
name: Reynoso, E. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: With the aim of studying the properties of Galactic IR bubbles and their impact in massive star formation, we present a study of the IR bubble S169, associated with the massive star forming region IRAS12326-6245. We used CO(2-1),$^{13}$CO(2-1), C$^{18}$O(2-1), HCN(3-2), and HCO+(3-2) line data obtained with the APEX telescope to study the properties of the molecular gas in the nebula and the IRAS source . To analyze the properties and distribution of the dust, we used IRAC-GLIMPSE, Herschel, and ATLASGAL data. The properties of the ionized gas were studied using images obtained from the SUMSS survey and SuperCOSMOS database. In our search for stellar and protostellar objects in the region, we used IR and optical point source calalogs. The new APEX observations allowed us to identify three molecular components associated with the nebula, namely: at $-$39 km/s (component A), $-$25 km/s (component B), and $-$17 km/s (component C). Six molecular condensations (MC1 to MC6) were identified in component A, with MC3 (the densest and more massive one) being the molecular counterpart of IRAS12326-6245. For this source, we estimated an H$_2$ column density up to 8$\times$10$^{23}$ cm$^{-2}$. To explain the morphology and velocity of components A, B, and C, we propose a simple model consisting of a partially complete semisphere-like structure expanding at ~ 12 km/s. The introduction of this model has led to a discussion about the distance to both S169 and IRAS12326-6245, which was estimated to be ~ 2 kpc. Several candidate YSOs were identified, projected mostly onto the molecular condensations MC3, MC4, and MC5, which indicates that the star-formation process is very active at the borders of the nebula. A comparison between observable and modeled parameters was not enough to discern whether the collect-and-collapse mechanism is acting at the edge of S169.
description: 17 pages, 12 figures. Accepted for publication in A&A
Non perturbative Adler-Bardeen Theorem
Creators: name: Mastropietro, Vieri
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Adler-Bardeen theorem has been proved only as a statement valid at all orders in perturbation theory, without any control on the convergence of the series. In this paper we prove a nonperturbative version of the Adler-Bardeen theorem in $d=2$ by using recently developed technical tools in the theory of Grassmann integration.
description: 28 pages, 14 figures
MPEC 2024-A28 : 2023 YD2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 YD2

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Extreme problems for convex curves with given relative Chebyshev radius
Creators: name: Balestro, Vitor
name: Martini, Horst
name: Nikonorov, Yurii
name: Nikonorova, Yulia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: The paper is devoted to some extremal problems for convex curves and polygons in the Euclidean plane referring to the relative Chebyshev radius. In particular, we determine the relative Chebyshev radius for an arbitrary triangle. Moreover, we derive the maximal possible perimeter for convex curves and convex n-gons of a given relative Chebyshev radius.