cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Characteristics and Production Costs of U.S. Corn Farms, 1991
Creators: name: McBride, William D.
name: McBride, William D.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Production Economics

description: The average variable cash cost of producing a bushel of corn was $1.25 for producers surveyed in the 1991 Farm Costs and Returns Survey. Individual farm costs ranged from about $0.40 to more than $8 per bushel. Regional differences in production practices and growing conditions had the greatest influence on production costs. Corn growers in the North Central and Plains regions had a significant cost advantage over producers in the Northeast and Southeast. Dry weather reduced yield and resulted in abnormally high per-bushel costs in the Northeast. Nearly 70 percent of Northeast producers and more than half of Southeast producers were high-cost corn growers in 1991.
Laser-induced torques in spin spirals
Creators: name: Freimuth, Frank
name: Mokrousov, Yuriy
name: Blügel, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate laser-induced torques in magnetically non-collinear ferromagnets with a spin-spiral magnetic structure using \textit{ab-initio} calculations. Since spin-spirals may be used to approximate the magnetization gradients locally in domain walls and skyrmions, our method may be used to obtain the laser-induced torques in such objects from a multiscale approach. Employing the generalized Bloch-theorem we obtain the electronic structure computationally efficiently. We employ our method to assess the laser-induced torques in bcc Fe, hcp Co, and L$_{1}0$ FePt when a spin-spiral magnetic structure is imposed. We find that the laser-induced torques in these magnetically noncollinear systems may be orders of magnitude larger than those in the corresponding magnetically collinear systems and that they exist both for linearly and circularly polarized light. This result suggests that laser-induced torques driven by noncollinear magnetic order or by magnetic fluctuations may contribute significantly to processes in ultrafast magnetism.
ปริมาณสปอร์ของรา Aspergillus, Cladosporium และ Penicillium ชักนำให้เกิดโรคหอบหืดอย่างมีศักยภาพในนักเรียนอายุ 10-15 ปี
Creators: name: ณัฐชะพงศ์ ทองเงิน
name: ศุภวิชญ์ นาคครื้น
name: ณัฐจิต อ้นเมฆ
name: จินดา คงเจริญ
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: ปริมาณรา, โรคหอบหืด, โรคภูมิแพ้, นักเรียน, โรงเรียน

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
First and second-type self-similar solutions of implosions and explosions containing ultra-relativistic shocks
Creators: name: Sari, Re'em
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive self similar solutions for ultra-relativistic shock waves propagating into cold material of powerlaw density profile in radius rho ~ r^-k. We treat both implosions and explosions in three geometries: planar, cylindrical and spherical. For spherical explosions these are the first type solutions of Blandford and McKee for k<4 and the second type solutions found by Best and Sari for k>5-sqrt(3/4). In addition we find new, hollow (with evacuated interior), first type solutions that may be applicable for 4
description: Submitted to Physics of Fluids, March 4
การประเมินแนวปฏิบัติในการประเมินภาวะตัวเหลืองในทารกแรกเกิดที่โรงพยาบาลคลองหลวง จังหวัดปทุมธานี
Creators: name: สุชีรา แก้วประไพ
name: สุทธิพรรณ กิจเจริญ
name: จิราพร สิทธิถาวร
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: ภาวะตัวเหลืองในทารกแรกเกิด, ไมโครบิลิรูบิน, สมองพิการจากบิลิรูบิน

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Cubature rules for weakly and fully compressible off-lattice Boltzmann methods
Creators: name: Wilde, Dominik
name: Krämer, Andreas
name: Bedrunka, Mario
name: Reith, Dirk
name: Foysi, Holger
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Off-lattice Boltzmann methods increase the flexibility and applicability of lattice Boltzmann methods by decoupling the discretizations of time, space, and particle velocities. However, the velocity sets that are mostly used in off-lattice Boltzmann simulations were originally tailored to on-lattice Boltzmann methods. In this contribution, we show how the accuracy and efficiency of weakly and fully compressible semi-Lagrangian off-lattice Boltzmann simulations is increased by velocity sets derived from cubature rules, i.e. multivariate quadratures, which have not been produced by the Gauss-product rule. In particular, simulations of 2D shock-vortex interactions indicate that the cubature-derived degree-nine D2Q19 velocity set is capable to replace the Gauss-product rule-derived D2Q25. Likewise, the degree-five velocity sets D3Q13 and D3Q21, as well as a degree-seven D3V27 velocity set were successfully tested for 3D Taylor-Green vortex flows to challenge and surpass the quality of the customary D3Q27 velocity set. In compressible 3D Taylor-Green vortex flows with Mach numbers Ma={0.5;1.0;1.5;2.0} on-lattice simulations with velocity sets D3Q103 and D3V107 showed only limited stability, while the off-lattice degree-nine D3Q45 velocity set accurately reproduced the kinetic energy provided by literature.
อุปสรรคในการเผยแพร่นวัตกรรมด้านการก่อสร้างในประเทศไทย
Creators: name: กาศิ งามกมลรัตน์
name: สิงห์ อินทรชูโต
name: ชนิกานต์ ยิ้มประยูร
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: การเผยแพร่นวัตกรรม, อุปสรรคในการเผยแพร่นวัตกรรม, อุตสาหกรรมการก่อสร้าง, สถาปัตยกรรม

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Morgan-Morgan-NUT disk space via the Ehlers transformation
Creators: name: Momeni, D.
name: Nouri-Zonoz, M.
name: Ramazani-Arani, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the Ehlers transformation along with the gravitoelectromagnetic approach to stationary spacetimes we start from the Morgan-Morgan disk spacetime (without radial pressure) as the seed metric and find its corresponding stationary spacetime. As expected from the Ehlers transformation the stationary spacetime obtained suffers from a NUT-type singularity and the new parameter introduced in the stationary case could be interpreted as the gravitomagnetic monopole charge (or the NUT factor). As a consequence of this singularity there are closed timelike curves (CTCs) in the singular region of the spacetime. Some of the properties of this spacetime including its particle velocity distribution, gravitational redshift, stability and energy conditions are discussed.
description: 18 pages, 5 figures, RevTex 4, replaced with the published version
การเพิ่มประสิทธิภาพในการจับแสงของอุปกรณ์ AWG โดยการเปลี่ยนโครงสร้างของท่อนำคลื่นขาออก
Creators: name: เจนวิทย์ ทิพย์พินิจ
name: วีรชัย อัศวเมธาพันธ์
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: บาดเจ็บศีรษะเล็กน้อย, การเฝ้าระวัง, การป้องกัน, ภาวะเลือดออกในสมอง

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Initiation and Maintenance of Physical Activity Behaviour in Adults with Congenital Heart Disease
Creators: name: MacCosham, Brad
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: ACHD
stages of behavioural change
social ecological model
physical activity
qualitative

description: The purpose of this study is to qualitatively explore how physical activity engagement is initiated and maintained in adult patients with congenital heart disease (ACHD). The rising number of aging ACHD patients means they could need more healthcare resources for lifelong treatments to maintain their health. One cost-efficient and natural way to maintain the health of ACHD patients is through physical activity participation. Unfortunately, though, ACHD patients tend to be sedentary, and research has yet to adequately explore the factors influencing physical activity behaviour within this population. To gain a better understanding on this topic, this study combines the transtheoretical model and social ecological model to uncover factors influencing physical activity behaviour in ACHD patients who are at different levels of motivation. This study utilizes a qualitative research design: over six months, 27 participants took part in three individual semi-structured interviews for a total of 78 interviews (three participants did not complete all three interviews). The study revealed that several factors influenced physical activity behaviour in ACHD patients at different stages of motivation. In addition, findings on the characteristics of participants in each stage, meanings of physical activity and strategies for promoting physical activity for ACHD patients are also presented, as well as practical findings (i.e., physical activity program for ACHD patients). This thesis is important for healthcare professionals as it could facilitate the development of stage-specific interventions designed to increase physical activity behaviour in ACHD patients.
Air Quality Stripes A Global History of Air Pollution
Creators: name: Pringle, Kirsty
Publisher: name: Zenodo
Year: 2025

description: Take a journey through the global history of air pollution.

From Edinburgh’s days as ‘Auld Reekie’ and London’s ‘Pea Souper’ smogs, to the toxic haze of modern-day Delhi, air pollution has plagued city dwellers for centuries. So take a deep breath and take a journey through the global history of air pollution. Guided by the ‘Air Quality Stripes,’ we’ll explore how pollution levels have shifted across the world. Discover the science behind the data and gain insights into the air quality challenges – and solutions – for a healthier future.
Educational studies of cosmic rays with telescope of Geiger-Muller counters
Creators: name: Wibig, T.
name: Kolodziejczak, K.
name: Pierzynski, R.
name: Sobczak, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: A group of high school students (XII Liceum) in the framework of the Roland Maze Project has built a compact telescope of three Geiger-Muller counters. The connection between the telescope and PC computer was also created and programed by students involved in the Project. This has allowed students to use their equipment to perform serious scientific measurements concerning the single cosmic ray muon flux at ground level and below. These measurements were then analyzed with the programs based on the 'nowadays' knowledge on statistics. An overview of the apparatus, methods and results were presented at several students conferences and recently won the first prize in a national competition of high school students scientific work. The telescope itself, in spite of its 'scientific' purposes, is built in such a way that it is hung on a wall in a school physics lab and counts muons continuously. This can help to raise the interest for studying physics among others. At present a few (3) groups of young participants of the Roland Maze Project have already built their own telescopes for their schools and some others are working on it. This work is a perfect example of what can be done by young people when respective opportunities are created by more experienced researchers and a little help and advice is given.
description: 5 figures, 10 pages
การเปรียบเทียบการวิเคราะห์เสถียรภาพของคันดินด้วยวิธีสมดุลขีดจำกัดและวิธีไฟไนต์เอลิเมนต์
Creators: name: พิทักษ์ชน ทันมัง
name: วีรยา ฉิมอ้อย
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: เสถียรภาพของลาดดิน, วิธีสมดุลขีดจำกัด, วิธีไฟไนต์เอลิเมนต์, ค่าสัมประสิทธิ์ความปลอดภัย

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Intrinsic Amplitude-Noise Suppression in Fiber Lasers Mode-locked with Nonlinear Amplifying Loop Mirrors
Creators: name: Edelmann, Marvin
name: Hua, Yi
name: Şafak, Kemal
name: Kärtner, Franz X.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this work, we investigate the steady-states of a fiber lasers mode-locked with a nonlinear amplifying loop-mirror that has an inherent amplitude noise-suppression mechanism. Due to the interaction of the sinusoidal transmission function with the fluctuating intracavity pulse amplitude we show that this mechanism may lead to a detectable difference in relative intensity noise at the reflected and transmitted output port under specific preconditions. We present systematic intensity noise measurements with a nonlinear fiber-based system that replicates a single roundtrip in the laser cavity. Experimental results and simulations clearly show a reduction of the intracavity amplitude fluctuations up to 4 dB for certain steady-states.
description: 4 pages, 4 figures
ความหลากหลายของพืชอาหารของผึ้งในหมู่บ้านทิพุเยตำบลชะแล อำเภอทองผาภูมิ จังหวัดกาญจนบุรี
Creators: name: สัมฤทธิ์ มากสง
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: พืชอาหารผึ้ง, ผึ้ง

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Resistivity scaling and critical dynamics of fully frustrated Josephson-junction arrays with on-site dissipation
Creators: name: Granato, Enzo
name: Dominguez, Daniel
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the scaling behavior and critical dynamics of the resistive transition in Josephson-junction arrays, at f=1/2 flux quantum per plaquette, by numerical simulation of an on-site dissipation model for the dynamics. The results are compared with recent simulations using the resistively-shunted-junction model. For both models, we find that the resistivity scaling and critical dynamics of the phases are well described by the same critical temperature as for the chiral (vortex-lattice) transition, with a power-law divergent correlation length. The behavior is consistent with the single transition scenario, where phase and chiral variables order at the same temperature, but with different dynamic exponents z for phase coherence and chiral order.
description: 17 pages, 13 figures, to appear in Phys. Rev. B
Effects of Rotation and Relativistic Charge Flow on Pulsar Magnetospheric Structure
Creators: name: Muslimov, Alex G.
name: Harding, Alice K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose an analytical 3-D model of the open field-line region of a neutron star (NS) magnetosphere. We construct an explicit analytic solution for arbitrary obliquity (angle between the rotation and magnetic axes) incorporating the effects of magnetospheric rotation, relativistic flow of charges (e.g. primary electron beam) along the open field lines, and E X B drift of these charges. Our solution employs the space-charge-limited longitudinal current calculated in the electrodynamic model of Muslimov & Tsygan (1992) and is valid up to very high altitudes nearly approaching the light cylinder. We assume that in the innermost magnetosphere, the NS magnetic field can be well represented by a static magnetic dipole configuration. At high altitudes the open magnetic field lines significantly deviate from those of a static dipole and tend to focus into a cylindrical bundle, swept back in the direction opposite to the rotation, and also bent towards the rotational equator. We briefly discuss some implications of our study to spin-powered pulsars.
description: 24 pages, 3 figures, accepted for publication in ApJ
พฤติกรรมธรรมชาติ : สวัสดิภาพในสุกรและไก่
Creators: name: พิพัฒน์ สมภาร
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: สุกร, ไก่, สวัสดิภาพสัตว์, พฤติกรรมธรรมชาติ, การเพิ่มคุณค่าชีวิตด้วยสภาพแวดล้อม

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Multi-Channel Auto-Calibration for the Atmospheric Imaging Assembly using Machine Learning
Creators: name: Santos, Luiz F. G. dos
name: Bose, Souvik
name: Salvatelli, Valentina
name: Neuberg, Brad
name: Cheung, Mark C. M.
name: Janvier, Miho
name: Jin, Meng
name: Gal, Yarin
name: Boerner, Paul
name: Baydin, Atılım Güneş
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Solar activity plays a quintessential role in influencing the interplanetary medium and space-weather around the Earth. Remote sensing instruments onboard heliophysics space missions provide a pool of information about the Sun's activity via the measurement of its magnetic field and the emission of light from the multi-layered, multi-thermal, and dynamic solar atmosphere. Extreme UV (EUV) wavelength observations from space help in understanding the subtleties of the outer layers of the Sun, namely the chromosphere and the corona. Unfortunately, such instruments, like the Atmospheric Imaging Assembly (AIA) onboard NASA's Solar Dynamics Observatory (SDO), suffer from time-dependent degradation, reducing their sensitivity. Current state-of-the-art calibration techniques rely on periodic sounding rockets, which can be infrequent and rather unfeasible for deep-space missions. We present an alternative calibration approach based on convolutional neural networks (CNNs). We use SDO-AIA data for our analysis. Our results show that CNN-based models could comprehensively reproduce the sounding rocket experiments' outcomes within a reasonable degree of accuracy, indicating that it performs equally well compared with the current techniques. Furthermore, a comparison with a standard "astronomer's technique" baseline model reveals that the CNN approach significantly outperforms this baseline. Our approach establishes the framework for a novel technique to calibrate EUV instruments and advance our understanding of the cross-channel relation between different EUV channels.
description: 12 pages, 7 figures, 8 tables. This is a pre-print of an article submitted and accepted by A&A Journal
การใช้ลำดับนิวคลีโอไทด์ของยีน rpoBและชิ้นดีเอ็นเอที่อยู่ระหว่างยีน trnH กับ psbAเพื่อวิเคราะห์ความสัมพันธ์ทางพันธุกรรมของมะม่วงในประเทศไทย
Creators: name: นฤมล ธนานันต์
name: ปิยดา บุสดี
name: ธีระชัย ธนานันต์
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: มะม่วง, ความสัมพันธ์ทางพันธุกรรม, ยีน rpoB, ชิ้นดีเอ็นเอที่อยู่ระหว่างยีน trnH กับ psbA

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
Nonlinear interferometer for Fourier-transform mid-infrared gas spectroscopy using near-infrared detection
Creators: name: Lindner, Chiara
name: Kunz, Jachin
name: Herr, Simon J.
name: Wolf, Sebastian
name: Kiessling, Jens
name: Kühnemann, Frank
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nonlinear interferometers allow for mid-infrared spectroscopy with near-infrared detection using correlated photons. Previous implementations have demonstrated a spectral resolution limited by spectrally selective detection. In our work, we demonstrate mid-infrared transmission spectroscopy in a nonlinear interferometer using single-pixel near-infrared detection and Fourier-transform analysis. A sub-wavenumber spectral resolution allows for rotational-line-resolving spectroscopy of gaseous samples in a spectral bandwidth of over 700$\,$cm$^{-1}$. We use methane transmission spectra around 3.3$\,μ$m wavelength to characterize the spectral resolution, noise limitations and transmission accuracy of our device. The combination of nonlinear interferometry and Fourier-transform analysis paves the way towards performant and efficient mid-infrared spectroscopy with near-infrared detection.
description: \copyright 2021 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved
Using Quantum Annealers to Calculate Ground State Properties of Molecules
Creators: name: Copenhaver, Justin
name: Wasserman, Adam
name: Wehefritz-Kaufmann, Birgit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum annealers are an alternative approach to quantum computing which make use of the adiabatic theorem to efficiently find the ground state of a physically realizable Hamiltonian. Such devices are currently commercially available and have been successfully applied to several combinatorial and discrete optimization problems. However, the application of quantum annealers to problems in chemistry remains a relatively sparse area of research due to the difficulty in mapping molecular systems to the Ising model Hamiltonian. In this paper we review two different methods for finding the ground state of molecular Hamiltonians using Ising model-based quantum annealers. In addition, we compare the relative effectiveness of each method by calculating the binding energies, bond lengths, and bond angles of the H+3and H2O molecules and mapping their potential energy curves. We also assess the resource requirements of each method by determining the number of qubits and computation time required to simulate each molecule using various parameter values. While each of these methods is capable of accurately predicting the ground state properties of small molecules, we find that they are still outperformed by modern classical algorithms and that the scaling of the resource requirements remains a challenge.
การประเมินประสิทธิภาพของเครื่องตรวจวิเคราะห์รุ่น Mindray CL-2000i ในการตรวจวัดระดับไทรอยด์ฮอร์โมนสารบ่งชี้มะเร็ง และฮอร์โมนเพศ
Creators: name: พลากร พุทธรักษ์
Publisher: name: กองบริหารการวิจัย มหาวิทยาลัยธรรมศาสตร์
Year: 2559
Subjects: การประเมินประสิทธิภาพเครื่องตรวจวิเคราะห์, ไทรอยด์ฮอร์โมน, สารบ่งชี้มะเร็ง, ฮอร์โมนเพศ

description: 1, 24, วารสารวิทยาศาสตร์และเทคโนโลยี
External Inverse-Compton Emission Associated with Extended and Plateau Emission of Short Gamma-Ray Bursts: Application to GRB 160821B
Creators: name: Zhang, B. Theodore
name: Murase, Kohta
name: Yuan, Chengchao
name: Kimura, Shigeo S.
name: Mészáros, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The recent detection of TeV photons from two gamma-ray bursts (GRBs), GRB 190114C and GRB 180720B, has opened a new window for multi-messenger and multi-wavelength astrophysics of high-energy transients. We study the origin of very-high-energy (VHE) $γ$-rays from the short GRB 160821B, for which the MAGIC Collaboration reported a $\sim 3 σ$ statistical significance. Short GRBs are often accompanied by extended and plateau emission, which is attributed to internal dissipation resulting from activities of a long-lasting central engine, and Murase et al. (2018) recently suggested the external inverse-Compton (EIC) scenario for VHE counterparts of short GRBs and neutron star mergers. Applying this scenario to GRB 160821B, we show that the EIC flux can reach $\sim 10^{-12}\rm~erg~cm^{-2}~s^{-1}$ within a time period of $\sim 10^3 - 10^4\rm~s$, which is consistent with the MAGIC observations. EIC $γ$-rays expected during the extended and plateau emission will be detectable with greater significance by future detectors such as the Cherenkov Telescope Array (CTA). The resulting light curve has a distinguishable feature, where the VHE emission is predicted to reach the peak around the end of the seed emission.
description: 6 pages, 2 figures, accepted for publication in ApJL
Rapid destruction of planetary debris around white dwarfs through aeolian erosion
Creators: name: Rozner, Mor
name: Veras, Dimitri
name: Perets, Hagai B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The discovery of numerous debris disks around white dwarfs (WDs), gave rise to extensive study of such disks and their role in polluting WDs, but the formation and evolution of these disks is not yet well understood. Here we study the role of aeolian (wind) erosion in the evolution of solids in WD debris disks. Aeolian erosion is a destructive process that plays a key role in shaping the properties and size-distribution of planetesimals, boulders and pebbles in gaseous protoplanetary disks. Our analysis of aeolian erosion in WD debris disks shows it can also play an important role in these environments. We study the effects of aeolian erosion under different conditions of the disk, and its erosive effect on planetesimals and boulders of different sizes. We find that solid bodies smaller than $\sim 5 \rm{km}$ will be eroded within the short disk lifetime. We compare the role of aeolian erosion in respect to other destructive processes such as collisional fragmentation and thermal ablation. We find that aeolian erosion is the dominant destructive process for objects with radius $\lesssim 10^3 \rm{cm}$ and at distances $\lesssim 0.6 R_\odot$ from the WD. Thereby, aeolian erosion constitutes the main destructive pathway linking fragmentational collisions operating on large objects with sublimation of the smallest objects and Poynting-Robertson drag, which leads to the accretion of the smallest particles onto the photosphere of WDs, and the production of polluted WDs.
description: Accepted to MNRAS
Existence of a Stationary Navier-Stokes Flow Past a Rigid Body, with Application to Starting Problem in Higher Dimensions
Creators: name: Takahashi, Tomoki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider the large time behavior of the Navier-Stokes flow past a rigid body in $\mathbb{R}^n$ with $n\geq 3$. We first construct a small stationary solution possessing the optimal summability at spatial infinity, which is the same as that of the Oseen fundamental solution. When the translational velocity of the body gradually increases and is maintained after a certain finite time, we then show that the nonstationary fluid motion converges to the stationary solution corresponding to a small terminal velocity of the body as time $t\rightarrow\infty$ in $L^q$ with $q\in[n,\infty]$. This is called Finn's starting problem and the three-dimensional case was affirmatively solved by Galdi, Heywood and Shibata $(1997).$ The present paper extends their result to the case of higher dimensions. Even for the three-dimensional case, our theorem provides new convergence rate, that is determined by the summability of the stationary solution at infinity and seems to be sharp.
description: 28 pages, Corrected typos, to appear in J. Math. Fluid Mech
Representation of reaching movements in motor cortex: a modeling perspective
Creators: name: W. Teka
name: K.  Hamade
name: S. N. Markin
name: R. F.  Rogers
name: I. A.  Rybak
name: Y. I.  Molkov
Publisher: name: F1000Research
Year: 2015

description: The motor cortex plays a major role in controlling voluntary movements by sending signals to the muscles through the spinal cord. Due to mapping complexity, the cortical representation of movement and the relationship between cortical neuronal activity and movement dynamics are not fully understood. How different movements are coded and represented in the cortical activity is a central question in motor control. Previous studies were based on two competing hypotheses. One approach attempts to correlate activity of primary motor cortex neurons during reaching movements with movement parameters (e.g., direction). A second approach suggests a dynamical systems model of motor control and assumes that neural activity in the motor cortex reflects temporal progression through dynamic motor programs corresponding to a particular motor task.

We have developed a model of a neuronal controller which governs a two-joint arm actuated by six muscles. This model describes the dynamics of voluntary arm movement controlled by a spinal cord circuit with afferent feedback. A thalamo-cerebellar-cortical controller in the model provides the neuronal motor program necessary to simulate reaching movements with bell-shaped velocity profiles and a straight line trajectories. To do so the controller first calculates the joint torques  which are necessary to move the arm along the specified trajectory and then generates these torques with agonist and antagonist muscles via specific activation of the low-level spinal circuit.

The model demonstrates that patterns of activity in the motor cortex may indeed strongly correlate with parameters of the reaching movement. The correlation is caused by the afferent feedback signals and movement geometry. We conclude that the dynamical paradigm of cortical representation of movement implies coding of both dynamical movement parameters and its geometrical characteristics.
[California field notebooks]
Creators: name: Kroeber, Alfred L.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: esq
subject: shh
subject: Chumashan language
subject: css

description: Photocopies of 5 notebooks, dated 1901, 1902, and 1912; transferred to Bancroft Library in April 1995 (see Kroeber.005 for memorandum). Cataloged by Bancroft with following information (see page 77 of finding aid, here: http://pdf.oac.cdlib.org/pdf/berkeley/bancroft/mcb925_cubanc.pdf):

001) Chumash: Notebook (24) 1901 (reel-frame 96:604, Ctn. 9, folder 10) [consultants Dolores & Maria Ocarpio]
002) Chumash: Notebook (25) 1901 (reel-frame 96:633, folder 11) [consultant Dolores]
003) Chumash/Costanoan/Esselen: Notebook (26) 1901-02 (reel-frame 96:670, folder 12)
004) Chumash: Notebook (102A) 1912 (reel-frame 97:2, folder 13)
005) Chumash (informant José Pelegrino Romero)/ Shoshonean (informant José de los
Santos Junco)/Gabrielino: Notebook (103B) 1912
Quantum annealing initialization of the quantum approximate optimization algorithm
Creators: name: Sack, Stefan H.
name: Serbyn, Maksym
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The quantum approximate optimization algorithm (QAOA) is a prospective near-term quantum algorithm due to its modest circuit depth and promising benchmarks. However, an external parameter optimization required in QAOA could become a performance bottleneck. This motivates studies of the optimization landscape and search for heuristic ways of parameter initialization. In this work we visualize the optimization landscape of the QAOA applied to the MaxCut problem on random graphs, demonstrating that random initialization of the QAOA is prone to converging to local minima with sub-optimal performance. We introduce the initialization of QAOA parameters based on the Trotterized quantum annealing (TQA) protocol, parameterized by the Trotter time step. We find that the TQA initialization allows to circumvent the issue of false minima for a broad range of time steps, yielding the same performance as the best result out of an exponentially scaling number of random initializations. Moreover, we demonstrate that the optimal value of the time step coincides with the point of proliferation of Trotter errors in quantum annealing. Our results suggest practical ways of initializing QAOA protocols on near-term quantum devices and reveals new connections between QAOA and quantum annealing.
description: 10 pages, 9 figures; typos corrected, references added
Is entanglement a probe of confinement?
Creators: name: Jokela, Niko
name: Subils, Javier G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study various entanglement measures in a one-parameter family of three-dimensional, strongly coupled Yang-Mills-Chern-Simons field theories by means of their dual supergravity descriptions. A generic field theory in this family possesses a mass gap but does not have a linear quark-antiquark potential. For the two limiting values of the parameter, the theories flow either to a fixed point or to a confining vacuum in the infrared. We show that entanglement measures are unable to discriminate confining theories from non-confining ones with a mass gap. This lends support on the idea that the phase transition of entanglement entropy at large-N can be caused just by the presence of a sizable scale in a theory and just by itself should not be taken as a signal of confinement. We also examine flows passing close to a fixed point at intermediate energy scales and find that the holographic entanglement entropy, the mutual information, and the F-functions for strips and disks quantitatively match the conformal values for a range of energies.
description: 22 pages + appendices, 13 figures
Flipping spins in mass transferring binaries and origin of spin-orbit misalignment in binary black holes
Creators: name: Stegmann, Jakob
name: Antonini, Fabio
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Close stellar binaries are prone to undergo a phase of stable mass transfer in which a star loses mass to its companion. Assuming that the donor star loses mass along the instantaneous interstellar axis, we derive the orbit-averaged equations of motion describing the evolution of the donor rotational angular momentum vector (spin) which accompanies the transfer of mass. We consider: (i) a model in which the mass transfer rate is constant within each orbit and (ii) a phase-dependent rate in which all mass per orbit is lost at periapsis. In both cases, we find that the ejection of $\gtrsim 30$ per cent of the donor's initial mass causes its spin to nearly flip onto the orbital plane of the binary, independently of the initial spin-orbit alignment. Moreover, we show that the spin flip due to mass transfer can easily dominate over tidal synchronisation in any giant stars and main-sequence stars with masses $\sim1.5$ to $5\,\rm M_\odot$. Finally, the general equations of motion, including tides, are used to evolve a realistic population of massive binary stars leading to the formation of binary black holes. Assuming that the stellar core and envelope are fully coupled, the resulting tilt of the first-born black hole reduces its spin projection onto the orbit normal by a factor $\sim\mathcal{O}(0.1)$. This result supports previous studies in favour of an insignificant contribution to the effective spin projection, $χ_{\rm eff}$, in binary black holes formed from the evolution of field binaries.
description: 17 pages, 8 figures, 1 table, accepted for publication by Physical Review D
($q$-)Supercongruences hit again
Creators: name: Zudilin, Wadim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 11A07, 11B65, 11F33, 33C20, 33D15

description: Using an intrinsic $q$-hypergeometric strategy, we generalise Dwork-type congruences $H(p^{s+1})/H(p^s)\equiv H(p^s)/H(p^{s-1})\pmod{p^3}$ for $s=1,2,\dots$ and $p$ a prime, when $H(N)$ are truncated hypergeometric sums corresponding to the periods of rigid Calabi--Yau threefolds.
description: 12 pages
On the thermopower of ionic conductor and ionic capacitors
Creators: name: Würger, Alois
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We theoretically study the thermoelectric response of ionic conductors to an applied temperaturegradient. As a main result we find that open and closed systems with respect to charge exchange,result in different expressions for the thermopower which may even take opposite signs. For theexperimentally most relevant zero-current steady state, we show that the thermopower of ionic conductorsdoes not depend on the mobilities, contrary to what is known for metals and semiconductors.The different behavior of ionic and electronic conductors is traced back to the unlike conservationlaws for ionic carriers and electron-hole pairs.
On the wavelet analysis of CMB time ordered data: application to Archeops
Creators: name: Macias-Perez, J. F.
name: Bourrachot, A.
name: Collaboration, the ARCHEOPS
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an alternative analysis of CMB time ordered data (TOD) using a wavelet-based representation of the data time-frequency plane. We demonstrate that the wavelet transform decorrelates $1/f$-type Gaussian stationary noise and permits a simple and functional description of locally stationary processes. In particular, this makes possible the generalization of the classical algorithms of map making and CMB power spectrum estimation to the case of locally stationary 1/f type noise. As an example, we present a wavelet based algorithm for the destriping of CMB-like maps. In addition, we describe a wavelet-based analysis of the Archeops data including time-frequency visualization, wavelet destriping and filtering of the TOD. These filtered data was used to produce polarized maps of Galactic dust diffuse emission. Finally, we describe the modeling of the non-stationarity on the Archeops noise for the estimation of the CMB power spectrum.
description: submitted to A & A Figures in jpg format For a full postscript vesion of the paper, please contact the authors
Gradient-based optimization of 3D MHD equilibria
Creators: name: Paul, Elizabeth
name: Landreman, Matt
name: Antonsen, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Using recently developed adjoint methods for computing the shape derivatives of functions that depend on MHD equilibria (Antonsen et al. 2019; Paul et al. 2020), we present the first example of analytic gradient-based optimization of fixed-boundary stellarator equilibria. We take advantage of gradient information to optimize figures of merit of relevance for stellarator design, including the rotational transform, magnetic well, and quasisymmetry near the axis. With the application of the adjoint method, we reduce the number of equilibrium evaluations by the dimension of the optimization space ($\sim 50-500$) in comparison with a finite-difference gradient-based method. We discuss regularization objectives of relevance for fixed-boundary optimization, including a novel method that prevents self-intersection of the plasma boundary. We present several optimized equilibria, including a vacuum field with very low magnetic shear throughout the volume.
Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO
Creators: name: Fang, A. C.
name: Capriotti, L.
name: Scalapino, D. J.
name: Kivelson, S. A.
name: Kaneko, N.
name: Greven, M.
name: Kapitulnik, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this paper we analyze, using scanning tunneling spectroscopy, the density of electronic states in nearly optimally doped BSCCO in zero field. Focusing on the superconducting gap, we find patches of what appear to be two different phases in a background of some average gap, one with a relatively small gap and sharp large coherence peaks and one characterized by a large gap with broad weak coherence peaks. We compare these spectra with calculations of the local density of states for a simple phenomenological model in which a 2 xi_0 * 2 xi_0 patch with an enhanced or supressed d-wave gap amplitude is embedded in a region with a uniform average d-wave gap.
description: 4 pages, 3 figures
Anomalous decay rate of quasinormal modes in Reissner-Nordström black holes
Creators: name: Fontana, R. D. B.
name: González, P. A.
name: Papantonopoulos, Eleftherios
name: Vásquez, Yerko
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The anomalous decay rate of the quasinormal modes occurs when the longest-lived modes are the ones with higher angular number. Such behaviour has been recently studied in different static spacetimes, for scalar and fermionic perturbations, being observed in both cases. In this work, we extend the existent studies to the charged spacetimes, namely, the Reissner-Nordström, the Reissner-Nordström-de Sitter and the Reissner-Nordström-Anti-de Sitter black holes. We show that the anomalous decay rate behaviour of the scalar field perturbations is present for every charged geometry in the photon sphere modes, with the existence of a critical scalar field mass whenever $Λ\geq 0$. In general, this critical value of mass increases with the raise of the black hole charge, thus rendering a minimum in the Schwarzschild limit. We also study the dominant mode/family for the massless and massive scalar field in these geometries showing a non-trivial dominance of the spectra that depends on the black hole mass and charge.
description: Version accepted for publication in PRD
Transcription of story by Turën of Moon
Creators: name: Panära, Kuka
name: Lapierre, Myriam
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: kre

description: Recording and text of transcription session. Audio and video recordings of original story (dated July 10, 2016) are archived with the Endangered Languages Archive (ELAR): https://elar.soas.ac.uk/Record/MPI1091645. See PDF pages 48-49 of associated field notes. Text transcription done directly on a laptop, with miscellaneous elicitation on grammatical topics that came up during the session.
Scattering of axial gravitational wave pulses by monopole black holes and QNMs
Creators: name: Gußmann, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study scattering of short Gaussian pulses of axial gravitational waves by a black hole that has swallowed one or more global monopoles. We show how the response of the black hole to the impinging pulses depends both on the number of monopoles the black hole has swallowed and on the symmetry breaking scale of the model which gave rise to the monopoles. We determine the corresponding quasinormal modes that get excited by the impinging pulses and that get imprinted in the black hole's response to the pulses. Such modes are also expected to show up in various other dynamical processes such as the ringdown phase of a binary black hole merger in case at least one of the companion black holes of the binary has swallowed one or more global monopoles.
description: 31 pages, 3 figures, v2: typos corrected, references added, refined QNM calculation added
MPEC 2024-A80 : 2024 AQ1
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: 2024 AQ1

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.
A Morse complex for Lorentzian geodesics
Creators: name: Abbondandolo, Alberto
name: Majer, Pietro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We prove the Morse relations for the set of all geodesics connecting two non-conjugate points on a class of globally hyperbolic Lorentzian manifolds. We overcome the difficulties coming from the fact that the Morse index of every geodesic is infinite, and from the lack of the Palais-Smale condition, by using the Morse complex approach.
description: 19 pages; updated references, final version
Real Classical Geometry with arbitrary deficit parameter(s) $α(_{I})$ in Deformed Jackiw-Teitelboim Gravity
Creators: name: Momeni, Davood
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An interesting deformation of the Jackiw-Teitelboim (JT) gravity has been proposed by Witten by adding a potential term $U(ϕ)$ as a self-coupling of the scalar dilaton field. During calculating the path integral over fields, a constraint comes from integration over $ϕ$ as $R(x)+2=2αδ(\vec{x}-\vec{x}')$. The resulting Euclidean metric suffered from a conical singularity at $\vec{x}=\vec{x}'$. A possible geometry modeled locally in polar coordinates $(r,φ)$ by $ds^2=dr^2+r^2dφ^2,φ\cong φ+2π-α$. In this letter we showed that there exists another family of "exact" geometries for arbitrary values of the $α$. A pair of exact solutions are found for the case of $α=0$. One represents the static patch of the AdS and the other one is the non static patch of the AdS metric. These solutions were used to construct the Green function for the inhomogeneous model with $α\neq 0$. We address a type of the phase transition between different patches of the AdS in theory because of the discontinuity in the first derivative of the metric at $x=x'$. We extended the study to the exact space of metrics satisfying the constraint $R(x)+2=2\sum_{i=1}^{k}α_iδ^{(2)}(x-x'_i)$ as a modulo diffeomorphisms for an arbitrary set of the deficit parameters $(α_1,α_2,..,α_k)$. The space is the moduli space of Riemann surfaces of genus $g$ with $k$ conical singularities located at $x'_k$ denoted by $\mathcal{M}_{g,k}$.
description: 21 pages, v3, New sections about BH solutions, time dependent geometry added, Title modified . References added
The expected duration of random sequential adsorption
Creators: name: Sudbury, Aidan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35 (Primary)

description: When gas molecules bind to a surface they may do so in such a way that the adsorption of one molecule inhibits the arrival of others. We consider random sequential adsorption in which the empty sites of a graph are irreversibly occupied in random order by a variety of types of ``particles.'' In a finite region the process terminates when no more particles can arrive. A universal asymptotic formula for the mean duration is given.
description: Published in at http://dx.doi.org/10.1214/07-AAP445 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Lexical elicitation
Creators: name: Mëtyktire-Panära, Kunityk
name: Panära, Kôkôsïrä
name: Lapierre, Myriam
name: Denófrio, João
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: txu

description: 300 words on Kayapô, a related Northern Jê language. See PDF pages 30-36, 37-38,and 39-45 of associated field notes. Elicitation conducted in Nänsêpôtiti on the first days, and in Sökâräsä on the last days. João Denófrio, an anthropology PhD student from UFRJ, and Kunityk's wife (a native speaker of Panära) are also present at times.