cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
COVID-19 Mobile EOR padlet: A co-curated selection of mobile tools (An Ecology Of Resources or EOR) that have enabled remote learning and collaboration during the COVID-19 crisis
Creators: name: Cochrane, Thomas
Publisher: name: figshare
Year: 2020
Subjects: subject: Education
subject: 130103 Higher Education
subject: FOS: Educational sciences

description: A co-curated selection of mobile tools (An Ecology Of Resources or EOR) that have enabled remote learning and collaboration during the COVID-19 crisis
ปัจจัยนวัตกรรมบริการและปัจจัยภาพลักษณ์องค์กรที่ส่งผลต่อความพึงพอใจของผู้ใช้บริการหน่วยงานรัฐวิสาหกิจแห่งหนึ่งในจังหวัดสุพรรณบุรี
Creators: name: ลัดดาวัลย์ สำราญ
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากรศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: นวัตกรรมบริการ
ภาพลักษณ์องค์กร
ความพึงพอใจ

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 2, 13-20
A Signature of Chromospheric Activity in Brown Dwarfs Revealed by 2.5-5.0 Micron AKARI Spectra
Creators: name: Sorahana, Satoko
name: Suzuki, Takeru K.
name: Yamamura, Issei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We propose that the 2.7 micron H_2O, 3.3 micron CH_4 and 4.6 micron CO absorption bands can be good tracers of chromospheric activity in brown dwarfs. In our previous study, we found that there are difficulties in explaining entire spectra between 1.0 and 5.0 microns with the Unified Cloudy Model (UCM), a brown dwarf atmosphere model. Based on simple radiative equilibrium, temperature in a model atmosphere usually decreases monotonically with height. However, if a brown dwarf has a chromosphere, as inferred by some observations, the temperature in the upper atmosphere is higher. We construct a simple model that takes into account heating due to chromospheric activity by setting a temperature floor in an upper atmosphere, and find that the model spectra of 3 brown dwarfs with moderate H-alpha emission, an indicator of chromospheric activity, are considerably improved to match the AKARI spectra. Because of the higher temperatures in the upper atmospheres, the amount of CH_4 molecules is reduced and the absorption band strengths become weaker. The strengths of the absorption bands of H_2O and CO also become weaker. On the other hand, other objects with weak H-alpha emission cannot be fitted by our treatment. We also briefly discuss magnetic heating processes which possibly operate in upper atmospheres, by extending our numerical simulations for the Sun and stars with surface convection to brown dwarf atmospheres.
description: 23 pages, 2 tables, 4 figures, Accepted for publication in MNRAS
Boundary obstructed topological superconductor in buckled honeycomb lattice under perpendicular electric field
Creators: name: Ghadimi, Rasoul
name: Lee, Seung Hun
name: Yang, Bohm-Jung
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this work, we show that a buckled honeycomb lattice can host a boundary-obstructed topological superconductor (BOTS) in the presence of f-wave spin-triplet pairing (fSTP). The underlying buckled structure allows for the manipulation of both chemical potential and sublattice potential using a double gate setup. Although a finite sublattice potential can stabilize the fSTP with a possible higher-order band topology, because it also breaks the relevant symmetry, the stability of the corner modes is not guaranteed. Here we show that the fSTP on the honeycomb lattice gives BOTS under nonzero sublattice potential, thus the corner modes can survive as long as the boundary is gapped. Also, by examining the large sublattice potential limit where the honeycomb lattice can be decomposed into two triangular lattices, we show that the boundary modes in the normal state are the quintessential ingredient leading to the BOTS. Thus the effective boundary Hamiltonian becomes nothing but the Hamiltonian for Kitaev chains, which eventually gives the corner modes of the BOTS.
description: 4+8 pages, 4+4 figures
Stress-induced anisotropy in granular materials: fabric, stiffness, and permeability
Creators: name: Kuhn, Matthew R.
name: Sun, WaiChing
name: Wang, Qi
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Materials science

description: The loading of a granular material induces anisotropies of the particle arrangement (fabric) and of the material’s strength, incremental stiffness, and permeability. Thirteen measures of fabric anisotropy are developed, which are arranged in four categories: as preferred orientations of the particle bodies, the particle surfaces, the contact normals, and the void space. Anisotropy of the voids is described through image analysis and with Minkowski tensors. The thirteen measures of anisotropy change during loading, as determined with three-dimensional discrete element simulations of biaxial plane strain compression with constant mean stress. Assemblies with four different particle shapes were simulated. The measures of contact orientation are the most responsive to loading, and they change greatly at small strains, whereas the other measures lag the loading process and continue to change beyond the state of peak stress and even after the deviatoric stress has nearly reached a steady state. The paper implements a methodology for characterizing the incremental stiffness of a granular assembly during biaxial loading, with orthotropic loading increments that preserve the principal axes of the fabric and stiffness tensors. The linear part of the hypoplastic tangential stiffness is monitored with oedometric loading increments. This stiffness increases in the direction of the initial compressive loading but decreases in the direction of extension. Anisotropy of this stiffness is closely correlated with a particular measure of the contact fabric. Permeabilities are measured in three directions with lattice Boltzmann methods at various stages of loading and for assemblies with four particle shapes. Effective permeability is negatively correlated with the directional mean free path and is positively correlated with pore width, indicating that the anisotropy of effective permeability induced by loading is produced by changes in the directional hydraulic radius.
Towards the Test of Saturation Physics Beyond Leading Logarithm
Creators: name: Stasto, Anna M.
name: Xiao, Bo-Wen
name: Zaslavsky, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present results from the first next-to-leading order (NLO) numerical analysis of forward hadron production in pA collisions in the small-x saturation formalism. Using parton distributions and fragmentation functions at NLO, as well as the dipole amplitude from the solution to the Balitsky-Kovchegov equation with running coupling, together with the NLO corrections to the hard coefficients, we obtain a good description of the available RHIC data in dAu collisions. We also comment on the results in the large p_T region beyond the saturation scale. Furthermore, we make predictions for forward hadron production in pPb collisions at the LHC. This analysis not only incorporates the important NLO corrections for all partonic channels, but also reduces the renormalization scale dependence and therefore helps to significantly reduce the theoretical uncertainties. It therefore provides a precise test of saturation physics beyond the leading logarithmic approximation.
description: 5 pages, 4 figures
Additional file 1 of Comparison of causal forest and regression-based approaches to evaluate treatment effect heterogeneity: an application for type 2 diabetes precision medicine
Creators: name: Venkatasubramaniam, Ashwini
name: Mateen, Bilal A.
name: Shields, Beverley M.
name: Hattersley, Andrew T.
name: Jones, Angus G.
name: Vollmer, Sebastian J.
name: Dennis, John M.
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 1: sFlowchart. A) CANTATA D and D2 trials. B) CPRD patient flow and inclusion criteria. sTable 1. Additional baseline clinical characteristics by initiated drug class in CPRD. sFigure 1. Distribution of the predicted individualized treatment effect of SGLT2-inhibitor treatment compared to DPP4-inhibitor treatment in the RCT derivation data. a) Penalized regression. sTable 2. Comparison of model performance for the penalised ridge regression model with lasso regression. sTable 3. Sensitivity analysis testing variation in predicted treatment effects varying the number of trees in the causal forest algorithm. sFigure 2. Treatment selection model performance for A) Penalized regression and B) Causal forest in CPRD validation data using double robust estimation incorporating inverse probability of treatment weighting and adjustment for all predictors and confounders in the outcome model. sFigure 3. Treatment selection model performance for A) Penalized regression and B) Causal forest in CPRD validation data using double robust estimation incorporating inverse probability of treatment weighting, inverse probability of censoring weighting, and adjustment for all predictors and confounders in the outcome model. sFigure 4. Treatment selection model performance for A) Penalized regression and B) Causal forest in CPRD validation data, in patients initiating second-line therapy only. TRIPOD Checklist.
Geometric phase and phase diagram for non-Hermitian quantum XY model
Creators: name: Zhang, X. Z.
name: Song, Z.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the geometric phase for the ground state of a generalized one-dimensional non-Hermitian quantum XY model, which has transverse-field-dependent intrinsic rotation-time reversal symmetry. Based on the exact solution, this model is shown to have full real spectrum in multiple regions for the finite size system. The result indicates that the phase diagram or exceptional boundary, which separates the unbroken and broken symmetry regions corresponds to the divergence of the Berry curvature. The scaling behaviors of the groundstate energy and Berry curvature are obtained in an analytical manner for a concrete system.
description: 6 pages, 3 figures
ปัจจัยที่เกี่ยวข้องกับการทำวิจัยตามเวลาที่กำหนดของนักวิจัย มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
Creators: name: เจนจิรา บ.ป.สูงเนิน
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากรศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: ปัจจัย
การทำวิจัย
เวลาที่กำหนด
นักวิจัย

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 2, 21-28
Improving Language Model Predictions via Prompts Enriched with Knowledge Graphs
Creators: name: Brate, Ryan
name: Dang, Minh-Hoang
name: Hoppe, Fabian
name: He, Yuan
name: Meroño-Peñuela, Albert
name: Sadashivaiah, Vijay
Publisher: name: CEUR-WS.org
Year: 2022

description: Despite advances in deep learning and knowledge graphs (KGs), using language models for natural language understanding and question answering remains a challenging task. Pre-trained language models (PLMs) have shown to be able to leverage contextual information, to complete cloze prompts, next sentence completion and question answering tasks in various domains. Unlike structured data querying in e.g. KGs, mapping an input question to data that may or may not be stored by the language model is not a simple task. Recent studies have highlighted the improvements that can be made to the quality of information retrieved from PLMs by adding auxiliary data to otherwise naive prompts. In this paper, we explore the effects of enriching prompts with additional contextual information leveraged from the Wikidata KG on language model performance. Specifically, we compare the performance of naive vs. KG-engineered cloze prompts for entity genre classification in the movie domain. Selecting a broad range of commonly available Wikidata properties, we show that enrichment of cloze-style prompts with Wikidata information can result in a significantly higher recall for the investigated BERT and RoBERTa large PLMs. However, it is also apparent that the optimum level of data enrichment differs between models.
NNLO QCD corrections to jet production at hadron colliders from gluon scattering
Creators: name: Currie, James
name: Ridder, Aude Gehrmann-De
name: Glover, E. W. N.
name: Pires, Joao
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the next-to-next-to-leading order (NNLO) QCD corrections to dijet production in the purely gluonic channel retaining the full dependence on the number of colours. The sub-leading colour contribution in this channel first appears at NNLO and, as expected, increases the NNLO correction by around 10% and exhibits a pT dependence, rising from 8% at low pT to 15% at high pT . The present calculation demonstrates the utility of the antenna subtraction method for computing the full colour NNLO corrections to dijet production at the Large Hadron Collider.
description: 33 pages, 4 figures
The radio shut-off, glitch, and X-ray burst in 1E 1547.0-5408 interpreted through magnetic reconfiguration
Creators: name: Suvorov, Arthur G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A short X-ray burst was observed from the radio-loud magnetar 1E 1547.0-5408 in 2022 April. Unusually however, the source stopped showing radio pulsations $\gtrsim 3\,$weeks prior to the burst. After recovery, radio timing revealed that the object had also undergone a modest glitch. A model for the overall event is constructed where an initially mild perturbation adjusts the magnetic geometry near the polar caps, leading to shallow fractures. Crustal ejecta or particles leaking from a pair-plasma fireball pollute the magnetospheric gaps, shutting off the pulsar mechanism, but the energy release is not yet large enough to noticeably enhance the X-ray flux. This perturbation gradually ramps, eventuating in a large-scale energy redistribution which fuels the burst. The star's mass quadrupole moment changes in tandem, issuing a glitch. Some quantitative estimates for the magnetic reconfiguration under this interpretation are provided, based on a quasi-static model where the fluid evolves through a sequence of hydromagnetic equilibria.
description: 8 pages, 4 figures. Minor changes to match published version. Accepted for publication in MNRAS
Mapping de Rham-Gabadadze-Tolley bigravity into braneworld setup
Creators: name: Yamashita, Yasuho
name: Tanaka, Takahiro
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss whether or not bigravity theory can be embedded into the braneworld setup. As a candidate, we consider Dvali-Gabadadze-Porrati two-brane model with the Goldberger-Wise radion stabilization. We will show that we can construct a ghost free model whose low energy spectrum is composed of a massless graviton and a massive graviton with a small mass. As is expected, the behavior of this effective theory is shown to be identical to de Rham-Gabadadze-Tolley bigravity. Unfortunately, this correspondence breaks down at a relatively low energy due to the limitation of the adopted stabilization mechanism.
description: 16 pages, 1 figure
Transport of a Bose gas in 1D disordered lattices at the fluid-insulator transition
Creators: name: Tanzi, Luca
name: Lucioni, Eleonora
name: Chaudhuri, Saptarishi
name: Gori, Lorenzo
name: Kumar, Avinash
name: D'Errico, Chiara
name: Inguscio, Massimo
name: Modugno, Giovanni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the momentum-dependent transport of 1D quasi-condensates in quasiperiodic optical lattices. We observe a sharp crossover from a weakly dissipative regime to a strongly unstable one at a disorder-dependent critical momentum. In the limit of non-disordered lattices the observations indicate a contribution of quantum phase slips to the dissipation. We identify a set of critical disorder and interaction strengths for which such critical momentum vanishes, separating a fluid regime from an insulating one. We relate our observation to the predicted zero-temperature superfluid-Bose glass transition.
Thermodynamics of the ferromagnetic phase transition in nearly half metallic CoS2 at high pressures
Creators: name: Elkin, F. S.
name: Zibrov, I. P.
name: Novikov, A. P.
name: Khasanov, S. S.
name: Sidorov, V. A.
name: Petrova, A. E.
name: Lograsso, T. A.
name: Thompson, J. D.
name: Stishov, S. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The volume change and heat capacity at the ferromagnetic phase transition in CoS2 were measured at high pressures using X-rays generated by the Argonne synchrotron light source and by ac-calorimetry, respectively. The transition entropy, calculated on the basis of these experimental data, drops along the transition line due to quantum degradation, as required by Nernst law. The volume change increases strongly along the transition line, which is explained by specifics of the compressibility difference of coexisting phases that results from nearly half metallic nature of the ferromagnetic phase of CoS2.
Temporal prediction of epidemic patterns in community networks
Creators: name: Peng, Xiao-Long
name: Small, Michael
name: Xu, Xin-Jian
name: Fu, Xinchu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Most previous studies of epidemic dynamics on complex networks suppose that the disease will eventually stabilize at either a disease-free state or an endemic one. In reality, however, some epidemics always exhibit sporadic and recurrent behaviour in one region because of the invasion from an endemic population elsewhere. In this paper we address this issue and study a susceptible-infected-susceptible epidemiological model on a network consisting of two communities, where the disease is endemic in one community but alternates between outbreaks and extinctions in the other. We provide a detailed characterization of the temporal dynamics of epidemic patterns in the latter community. In particular, we investigate the time duration of both outbreak and extinction, and the time interval between two consecutive inter-community infections, as well as their frequency distributions. Based on the mean-field theory, we theoretically analyze these three timescales and their dependence on the average node degree of each community, the transmission parameters, and the number of intercommunity links, which are in good agreement with simulations, except when the probability of overlaps between successive outbreaks is too large. These findings aid us in better understanding the bursty nature of disease spreading in a local community, and thereby suggesting effective time-dependent control strategies.
description: 21 pages, 10 figures, IoP-tex
Exam Schools, Ability, and the Effects of Affirmative Action: Latent Factor Extrapolation in the Regression Discontinuity Design
Creators: name: Rokkanen, Miikka A. T.
Publisher: name: Columbia University
Year: 2015
Subjects: Economics
Education, Higher

description: Selective school admissions give rise to a Regression Discontinuity (RD) design that non-parametrically identifies causal effects for marginal applicants. Without stronger assumptions nothing can be said about causal effects for inframarginal applicants. Estimates of causal effects for inframarginal applicants are valuable for many policy questions, such as affirmative action, that substantially alter admissions cutoffs. This paper develops a latent factor-based approach to RD extrapolation that is then used to estimate effects of Boston exam schools away from admissions cutoffs. Achievement gains from Boston exam schools are larger for applicants with lower English and Math abilities. I also use the model to predict the effects of introducing either minority or socioeconomic preferences in exam school admissions. Affirmative action has modest average effects on achievement, while increasing the achievement of the applicants who gain access to exam schools as a result.
Non minimally coupled condensate cosmologies: a phase space analysis
Creators: name: Carloni, Sante
name: Vignolo, Stefano
name: Cianci, Roberto
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present an analysis of the phase space of cosmological models based on a non minimal coupling between the geometry and a fermionic condensate. We obtain that the strong constraint coming from the Dirac equations allows a detailed design of the cosmology of these models and at the same time guarantees an evolution towards a state indistinguishable from General Relativistic cosmological models. In this light, we show how the use of some specific potentials is able to reproduce naturally two de Sitter phases separated by a power law expansion which could be an interesting model for the unification of an inflationary phase and a dark energy era.
description: 25 pages, 4 figures, submitted to Classical and Quantum Gravity
Different types of central bank insolvency and the central role of seignorage
Creators: name: Reis, Ricardo
Publisher: name: Columbia University
Year: 2015
Subjects: Economics
Finance
Banks and banking

description: A central bank is insolvent if its plans imply a Ponzi scheme on reserves so the price level becomes infinity. If the central bank enjoys fiscal support, in the form of a dividend rule that pays out net income every period, including when it is negative, it can never become insolvent independently of the fiscal authority. Otherwise, this note distinguishes between intertemporal insolvency, rule insolvency, and period insolvency. While period and rule solvency depend on analyzing dividend rules and sources of risk to net income, evaluating intertemporal solvency requires overcoming the difficult challenge of measuring the present value of seignorage.
Quantum Hall Effects in Monolayer-Bilayer Graphene Planar Junctions
Creators: name: Tian, Jifa
name: Jiang, Yongjin
name: Childres, Isaac
name: Cao, Helin
name: Hu, Jiangping
name: Chen, Yong P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The Hall resistance of a homogeneous electron system is well known to be anti-symmetric with respect to the magnetic field and the sign of charge carriers. We have observed that such symmetries no longer hold in planar hybrid structures consisting of partly single layer graphene (SLG) and partly bilayer graphene (BLG) in the quantum Hall (QH) regime. In particular, the Hall resistance (R12xy) across the SLG and BLG interface is observed to exhibit quantized plateaus that switch between those characteristic of SLG QH states and BLG QH states when either the sign of the charge carriers (controlled by a back gate) or the direction of the magnetic field is reversed. Simultaneously reversing both the carrier type and the magnetic field gives rise to the same quantized Hall resistances. The observed SLG-BLG interface QH states, with characteristic asymmetries with respect to the signs of carriers and magnetic field, are determined only by the chirality of the QH edge states and can be explained by a Landauer-Büttiker analysis applied to such graphene hybrid structures involving two regions of different Landau level (LL) structures.
SQUID current sensors with an integrated thermally actuated input current limiter
Creators: name: Körber, Rainer
name: Krzysteczko, Patryk
name: Klemm, Monique
name: Liu, Tianhao
name: Storm, Jan-Hendrik
name: Beyer, Jörn
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The development of SQUID current sensors with a thermally actuated input current limiter (TCL) integrated into the input circuit of the sensor is presented. The TCL is based on an unshunted Josephson Junction (JJ) series array, around which meanders a galvanically isolated, but tightly, thermally coupled, resistive heater element. By applying a current to the heater, the JJ critical currents can be reduced or completely suppressed, while the other on-chip SQUID circuit elements remain unaffected. The functional parameters of the TCL are determined by direct transport measurements and by static and dynamic flux coupling tests via the input circuit. In liquid Helium, a heater power, which reliably suppresses the critical current of the JJ array to zero, of $\sim$1.5 mW was needed, with the TCL normal state resistance being at 500 $Ω$. In this configuration, typical TCL switching times below 10 $μ$s were observed in the direct transport measurements. The TCL can be used to temporarily or even permanently disable malfunctioning channels in multichannel SQUID magnetometer systems, when feedback into their otherwise superconducting input circuits is not possible. In doing so, significant signal distortions in neighbouring channels from screening currents in these input circuits are avoided. Furthermore, by completely suppressing and restoring the TCL critical current, dc offset currents in the superconducting input circuits can be prevented. This is relevant, for instance, in SQUID-based spin precession experiments on hyperpolarized noble gases, in which even dc currents of a few $μ$A in the input circuit can lead to significant magnetic field distortions in the adjacent sample region contributing to the transverse spin-spin relaxation rate $1/T_{2}$
description: 7 pages, 6 figures, ASC 2022, submitted to Superconducting Science and Technology
ความสัมพันธ์ระหว่างคุณภาพชีวิต วัฒนธรรมองค์การกับประสิทธิผลในการปฏิบัติงานของบุคลากรสายสนับสนุนวิชาการ สังกัดวิทยาลัยโลจิสติกส์และซัพพลายเชน มหาวิทยาลัยราชภัฏสวนสุนันทา
Creators: name: วีรเชษฐ์ มั่งแว่น
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากรศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: คุณภาพชีวิต
วัฒนธรรมองค์การ
ประสิทธิผลในการปฏิบัติงาน
บุคลากรสายสนับสนุนวิชาการ

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 2, 29-37
A biomolecular electrostatics solver using Python, GPUs and boundary elements that can handle solvent-filled cavities and Stern layers
Creators: name: Cooper, Christopher D.
name: Bardhan, Jaydeep P.
name: Barba, L. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The continuum theory applied to bimolecular electrostatics leads to an implicit-solvent model governed by the Poisson-Boltzmann equation. Solvers relying on a boundary integral representation typically do not consider features like solvent-filled cavities or ion-exclusion (Stern) layers, due to the added difficulty of treating multiple boundary surfaces. This has hindered meaningful comparisons with volume-based methods, and the effects on accuracy of including these features has remained unknown. This work presents a solver called PyGBe that uses a boundary-element formulation and can handle multiple interacting surfaces. It was used to study the effects of solvent-filled cavities and Stern layers on the accuracy of calculating solvation energy and binding energy of proteins, using the well-known APBS finite-difference code for comparison. The results suggest that if required accuracy for an application allows errors larger than about 2%, then the simpler, single-surface model can be used. When calculating binding energies, the need for a multi-surface model is problem-dependent, becoming more critical when ligand and receptor are of comparable size. Comparing with the APBS solver, the boundary-element solver is faster when the accuracy requirements are higher. The cross-over point for the PyGBe code is in the order of 1-2% error, when running on one GPU card (NVIDIA Tesla C2075), compared with APBS running on six Intel Xeon CPU cores. PyGBe achieves algorithmic acceleration of the boundary element method using a treecode, and hardware acceleration using GPUs via PyCuda from a user-visible code that is all Python. The code is open-source under MIT license.
description: 12 pages, 11 figures
ปัจจัยที่มีผลต่อพฤติกรรมการนำนโยบายคณะคาร์บอนต่ำ (Low Carbon Faculty)สู่การปฏิบัติของบุคลากรและนักศึกษาคณะสิ่งแวดล้อมและทรัพยากรศาสตร์ มหาวิทยาลัยมหิดล
Creators: name: วรนันท์ บุตราช
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากรศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: การรับรู้
ทัศนคติ
พฤติกรรม
คณะคาร์บอนต่ำ

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 2, 38-52
Inflating Away the Public Debt? An Empirical Assessment
Creators: name: Hilscher, Jens
name: Raviv, Alon
name: Reis, Ricardo
Publisher: name: Columbia University
Year: 2014
Subjects: Economics
Finance

description: We propose and implement a method that provides quantitative estimates of the extent to which higher-than-expected inflation can lower the real value of outstanding government debt. Looking forward, we derive a formula for the debt burden that relies on detailed information about debt maturity and claimholders, and that uses option prices to construct risk-adjusted probability distributions for inflation at different horizons. The estimates suggest that it is unlikely that inflation will lower the US fiscal burden significantly, and that the effect of higher inflation is modest for plausible counterfactuals. If instead inflation is combined with financial repression that ex post extends the maturity of the debt, then the reduction in value can be significant.
Advancements to physics-based modelling of gallium nitride high-electron mobility transistors
Creators: name: Hodges, Jason
Publisher: name: Macquarie University
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: Gallium nitride (GaN) high-electron mobility transistors (HEMTs) have been a topic of rigorous research over the past several decades due to the promising theoretical properties of the GaN-based material system, where such properties include high carrier mobility, high breakdown voltages, high saturation velocity etc. Throughout the development of the GaN-based material system, it has been of an equal importance that a robust and accurate compact model for GaN HEMTs is standardised in order to allow for the translation of such devices into real world circuit applications. During recent times, the industry has seen the standardisation of the Advanced Spice Model for GaN HEMTs, ASM-HEMT, which is a physics-based compact model derived from the core formulations of the surface potential. As the GaN-based material system is still within its infancy, the importance of a robust and accurate physics-based compact model allows for meaningful insights into the development of device fabrication where the associated parameters pertain to the intrinsic device physics. This provides designers, at both the device and circuit level, with a more meaningful model card where the true performance of a design can be analysed at the fundamental level. As the GaNbased material system progresses, it is of the utmost importance that the ASM-HEMT model advances alongside with it. Naturally, in order for the ASM-HEMT model to be accepted as an industry standard model, it is already considered as an extremely robust and accurate compact model. However, due to the progressive nature of the GaN-based material system, advanced devices have been seen to exhibit characteristics that demand to be accounted for. The research efforts presented in this thesis serve as proposal methodologies to account for such characteristics which adhere to the physics-based nature of the ASM-HEMT model.
The Econometrics of Matching Models
Creators: name: Chiappori, Pierre A.
name: Salanie, Bernard
Publisher: name: Columbia University
Year: 2015
Subjects: Economics

description: In October 2012 the Nobel prize was attributed to Al Roth and Lloyd Shapley for their work on matching. Both the seminal Gale-Shapley (1962) paper and most of Roth’s work were concerned with allocation mechanisms when prices or other transfers cannot be used—what we will call non-transferable utility (NTU) in this survey. Gale and Shapley used college admissions, marriage, and roommate assignments as examples; and Roth’s fundamental work in market design has led to major improvements in the National Resident Matching Program (Roth and Peranson 1999) and to the creation of a mechanism for kidney exchange (Roth, Sönmez and Ünver 2004.) The resulting insights have been applied to a host of issues, including the allocation of students to schools, the marriage market with unbalanced gender distributions, the role of marital prospects in human capital investment decisions, the social impact of improved birth control technologies and many others. The econometrics of matching models have recently been reconsidered, from different and equally innovative perspectives. The goal of the present project will be to survey these methodological advances. We shall describe the main difficulties at stake, the various answers provided so far, and the issues that remain open.
METHODS FOR PRODUCING DETERGENT-DISPERSE ADDITIVES AND THEIR APPLICATION IN IMPROVING THE PROPERTIES OF DIESEL FUEL
Creators: name: Karimova S.A. Assistant at Bukhara State Medical Institute, Doctoral student at Bukhara Engineering and Technology Institute
Publisher: name: Zenodo
Year: 2023

description: Currently, natural gas and oil are the main energy sources of strategic importance in the world. The products obtained on the basis of their processing are widely used in all industries, transport, energy, agriculture and everyday life. For this reason, the use of energy-efficient technologies in the initial processing of hydrocarbon raw materials is an urgent problem.
Exploring what leads high school students to enroll in Hispanic-Serving Institutions: A multilevel analysis
Creators: name: Nuñez, Anne-Marie
name: Bowers, Alex J.
Publisher: name: Columbia University
Year: 2011
Subjects: Education, Higher
Community college students--Education
Community colleges
Education, Secondary

description: This study examined the student and high school contextual factors associated with high school students’ enrollment in Hispanic-Serving Institutions. We drew on a conceptual framework of college choice involving the concepts of multiple capitals, and individual and organizational habitus, to examine the postsecondary trajectories of high school graduates using the Educational Longitudinal Study 2002/06. Using Hierarchical Linear Modeling, we analyzed two separate models. One model predicted enrollment in an HSI within the 2-year sector and one within the 4-year sector. Distinct predictors of HSI versus non-HSI enrollment were found, particularly for the 4-year sector. This study suggests that, in both sectors, high school contexts had a significant effect of channeling students toward HSIs. Keywords: Hispanic-Serving Institutions, College choice, Hierarchical Linear Modeling, Habitus, Capital
การนำแผนกลยุทธ์ไปสู่การปฏิบัติโดยใช้โครงการเชิงกลยุทธ์: กรณีศึกษาวิทยาลัยนานาชาติ มหาวิทยาลัยมหิดล
Creators: name: กวิน มงคลประภา
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากรศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: แผนกลยุทธ์
โครงการเชิงกลยุทธ์
เทคนิคแผนที่ความคิด

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 2, 53-59
Gravity gradient torque of spacecraft orbiting asteroids
Creators: name: Wang, Yue
name: Xu, Shijie
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Purpose: This paper presents a full fourth-order model of the gravity gradient torque of spacecraft around asteroids by taking into consideration of the inertia integrals of the spacecraft up to the fourth order, which is an improvement of the previous fourth-order model of the gravity gradient torque. Design, methodology and approach: The fourth-order gravitational potential of the spacecraft is derived based on Taylor expansion. Then the expression of the gravity gradient torque in terms of gravitational potential derivatives is derived. By using the formulation of the gravitational potential, explicit formulations of the full fourth-order gravity gradient torque are obtained. Then a numerical simulation is carried out to verify our model. Findings: We find that our model is more sound and precise than the previous fourth-order model due to the consideration of higher-order inertia integrals of the spacecraft. Numerical simulation results show that the motion of the previous fourth-order model is quite different from the exact motion, while our full fourth-order model fits the exact motion very well. Our full fourth-order model is precise enough for high-precision attitude dynamics and control around asteroids. Practical implications: This high-precision model is of importance for the future asteroids missions for scientific explorations and near-Earth objects mitigation. Originality and value: In comparison with the previous model, a gravity gradient torque model around asteroids that is more sound and precise is established. This model is valuable for high-precision attitude dynamics and control around asteroids.
Optimal Design for Social Learning
Creators: name: Che, Yeon-Koo
name: Hörner, Johannes
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Economics
subject: Marketing
subject: FOS: Economics and business

description: This paper studies the design of a recommender system for organizing social learning on a product. To improve incentives for early experimentation, the optimal design trades off fully transparent social learning by over-recommending a product (or “spamming”) to a fraction of agents in the early phase of the product cycle. Under the optimal scheme, the designer spams very little about a product right after its release but gradually increases the frequency of spamming and stops it altogether when the product is deemed sufficiently unworthy of recommendation. The optimal recommender system involves randomly triggered spamming when recommendations are public—as is often the case for product ratings—and an information “blackout” followed by a burst of spamming when agents can choose when to check in for a recommendation. Fully transparent recommendations may become optimal if a (socially-benevolent) designer does not observe the agents’ costs of experimentation.
Phase-coexistence and glass-like behavior in magnetic and dielectric solids with long range order
Creators: name: Roy, S. B.
name: Chaddah, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Phase-coexistence in the manganese-oxide compounds or manganites with colossal magneto-resistance (CMR) has been generally considered to be an inhomogeneous ground state. An alternative explanation of phase-coexistence as the manifestation of a disorder-broadened first order magnetic phase transition being interrupted by the glasslike arrest of kinetics is now gradually gaining ground. This kinetic arrest of a first order phase transitions, between two states with long-range magnetic order, has actually been observed in various other classes of magnetic materials in addition to the CMR manganites. The underlying common features of this kinetic arrest of a first order phase transition are discussed in terms of the phenomenology of glasses. The possible manifestations of such glass-like arrested states across disorder-influenced first order phase transitions in dielectric solids and in multiferroic materials, are also discussed.
description: Accepted version, to appear in PSS(b) Special Issue 'Ferroic Glasses'
Institutions and Long-Run Economic Performance in Mexico and Spain, 1800-2000
Creators: name: Coatsworth, John H.
name: Tortella Casares, Gabriel
Publisher: name: Columbia University
Year: 2002
Subjects: Economic history
Latin Americans
History
Europeans

description: This paper argues that institutions, policies, and events played a fundamental role in determining the economic performance of Mexico and Spain over the long run. We do not dismiss geography, factor endowments, technological change, or indeed many other variables that helped shape economic performance over time. Our main point is that historical processes exogenous to the economy determined the extent to which each nation realized its economic potential.
Factors associated with poor control of 9/11-related asthma 10–11 years after the 2001 World Trade Center terrorist attacks
Creators: name: Jordan, Hannah T.
name: Stellman, Steven D.
name: Reibman, Joan
name: Farfel, Mark R.
name: Brackbill, Robert M.
name: Friedman, Stephen M.
name: Li, Jiehui
name: Cone, James E.
Publisher: name: Columbia University
Year: 2015
Subjects: Epidemiology
Medical sciences

description: Objective: To identify key factors associated with poor asthma control among adults in the World Trade Center (WTC) Health Registry, a longitudinal study of rescue/recovery workers and community members who were directly exposed to the 2001 WTC terrorist attacks and their aftermath. Methods: We studied incident asthma diagnosed by a physician from 12 September 2001 through 31 December 2003 among participants aged ≥18 on 11 September 2001, as reported on an enrollment (2003–2004) or follow-up questionnaire. Based on modified National Asthma Education and Prevention Program criteria, asthma was considered controlled, poorly-controlled, or very poorly-controlled at the time of a 2011–2012 follow-up questionnaire. Probable post-traumatic stress disorder, depression, and generalized anxiety disorder were defined using validated scales. Self-reported gastroesophageal reflux symptoms (GERS) and obstructive sleep apnea (OSA) were obtained from questionnaire responses. Multinomial logistic regression was used to examine factors associated with poor or very poor asthma control. Results: Among 2445 participants, 33.7% had poorly-controlled symptoms and 34.6% had very poorly-controlled symptoms in 2011–2012. Accounting for factors including age, education, body mass index, and smoking, there was a dose–response relationship between the number of mental health conditions and poorer asthma control. Participants with three mental health conditions had five times the odds of poor control and 13 times the odds of very poor control compared to participants without mental health comorbidities. GERS and OSA were significantly associated with poor or very poor control. Conclusions: Rates of poor asthma control were very high in this group with post-9/11 diagnosed asthma. Comprehensive care of 9/11-related asthma should include management of mental and physical health comorbidities.
Interference Effects in Bethe-Heitler Pair Creation in a Bichromatic Laser Field
Creators: name: Augustin, Sven
name: Müller, Carsten
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the creation of electron-positron pairs in the superposition of a nuclear Coulomb field and a two-color laser field of high intensity. Our focus lies on quantum interference effects, which may arise if the two laser frequencies are commensurable. We show that the interference manifests in the angular distributions of the created particles, which are discussed in the nuclear rest frame and the laboratory frame. Additionally, we demonstrate that the total pair-production rates can be affected by interference and identify the relative phase between the two laser modes, which optimizes the pair-production yield.
description: 12 pages, 9 figures
First observation of the $β$3$α$p decay of $^{13}\mathrm{O}$ via $β$-delayed charged-particle spectroscopy
Creators: name: Bishop, Jack
name: Rogachev, G. V.
name: Ahn, S.
name: Barbui, M.
name: Cha, S. M.
name: Harris, E.
name: Hunt, C.
name: Kim, C. H.
name: Kim, D.
name: Kim, S. H.
name: Koshchiy, E.
name: Luo, Z.
name: Park, C.
name: Parker, C. E.
name: Pollacco, E. C.
name: Roeder, B. T.
name: Roosa, M.
name: Saastamoinen, A.
name: Scriven, D. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Background: The $β$-delayed proton-decay of $^{13}\mathrm{O}$ has previously been studied, but the direct observation of $β$-delayed $α$+$α$+$α$+p decay has not been reported. Purpose: Observing rare 3$α$+p events from the decay of excited states in $^{13}\mathrm{N}^{\star}$ allows for a sensitive probe of exotic highly-clustered configurations in $^{13}$N. Method: To measure the low-energy products following $β$-delayed 3$α$p-decay, the TexAT Time Projection Chamber was employed using the one-at-a-time $β$-delayed charged-particle spectroscopy technique at the Cyclotron Institute, Texas A&M University. Results: A total of $1.9 \times 10^{5}$ $^{13}\mathrm{O}$ implantations were made inside the TexAT Time Projection Chamber. 149 3$α$+p events were observed yielding a $β$-delayed 3$α+p$ branching ratio of 0.078(6)%. Conclusion: Four previously unknown $α$-decaying states were observed, one with a strong $^{9}\mathrm{B(g.s)}+α$ characteristic at 11.3 MeV, one with a $^{9}\mathrm{B}(\frac{1}{2}^{+})+α$ nature at 12.4 MeV, and another two that are dominated by $^{9}\mathrm{B}({\frac{5}{2}}^{+})+α$ at 13.1 and 13.7 MeV. Population of the $\frac{1}{2}^{+}$ state in $^{9}\mathrm{B}$ has been unambiguously seen, cementing the predicted existence of the mirror-state based on the states observed in $^{9}\mathrm{Be}$.