cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The imprint of bursty star formation on alpha-element abundance patterns in Milky Way-like galaxies
Creators: name: Parul, Hanna
name: Bailin, Jeremy
name: Wetzel, Andrew
name: Gurvich, Alexander B.
name: Faucher-Giguère, Claude-André
name: Hafen, Zachary
name: Stern, Jonathan
name: Snaith, Owain
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Milky Way-mass galaxies in the FIRE-2 simulations demonstrate two main modes of star formation. At high redshifts star formation occurs in a series of short and intense bursts, while at low redshifts star formation proceeds at a steady rate with a transition from one mode to another at times ranging from 3 to 7 Gyr ago for different galaxies. We analyse how the mode of star formation affects iron and alpha-element abundance. We find that the early bursty regime imprints a measurable pattern in stellar elemental abundances in the form of a "sideways chevron" shape on the [Fe/H] - [O/Fe] plane and the scatter in [O/Fe] at a given stellar age is higher than when a galaxy is in the steady regime. That suggests that the evolution of [O/Fe] scatter with age provides an estimate of the end of the bursty phase. We investigate the feasibility of observing of this effect by adding mock observational errors to a simulated stellar survey and find that the transition between the bursty and steady phase should be detectable in the Milky Way, although larger observational uncertainties make the transition shallower. We apply our method to observations of the Milky Way from the Second APOKASC Catalog and estimate that the transition to steady star formation in the Milky Way happened 7-8 Gyrs ago, earlier than transition times measured in the simulations.
description: 15 pages; Accepted 17 January 2023 in MNRAS
Robustness of Polynomial Stability with Respect to Sampling
Creators: name: Wakaiki, Masashi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A55, 47D06, 93C25, 93C57, 93D15

description: We provide a partially affirmative answer to the following question on robustness of polynomial stability with respect to sampling: ``Suppose that a continuous-time state-feedback controller achieves the polynomial stability of the infinite-dimensional linear system. We apply an idealized sampler and a zero-order hold to a feedback loop around the controller. Then, is the sampled-data system strongly stable for all sufficiently small sampling periods? Furthermore, is the polynomial decay of the continuous-time system transferred to the sampled-data system under sufficiently fast sampling?'' The generator of the open-loop system is assumed to be a Riesz-spectral operator whose eigenvalues are not on the imaginary axis but may approach it asymptotically. We provide conditions for strong stability to be preserved under fast sampling. Moreover, we estimate the decay rate of the state of the sampled-data system with a smooth initial state and a sufficiently small sampling period.
description: 32 pages
Wheat Growers' Machinery Costs, by Size of Farm in Central North Dakota
Creators: name: Hole, Erling
name: Vermeer, James
name: Hole, Erling
name: Vermeer, James
Publisher: name: Unknown
Year: 1963
Subjects: Crop Production/Industries
Production Economics

description: Excerpt from the report Summary: This report includes the results of a study of costs of owning and operating machinery on 3 sizes of spring wheat farms in central North Dakota in 1960. Most of the data were obtained by an enumerative survey of about 150 farms. Total costs are shown as costs per acre of use, including costs of implement, tractor, and driver. Total cost per acre for major tractor-drawn and self-propelled machinery averaged about 15 percent higher on farms in group I, those with 180 to 419 acres of cropland, than on farms in group III, those with 660 to 899 acres. Costs on farms in group II, those with 420 to 659 acres of cropland, averaged only slightly higher than on those in group III.
The Faraday Rotation Measure Grid of the LOFAR Two-metre Sky Survey: Data Release 2
Creators: name: O'Sullivan, S. P.
name: Shimwell, T. W.
name: Hardcastle, M. J.
name: Tasse, C.
name: Heald, G.
name: Carretti, E.
name: Brüggen, M.
name: Vacca, V.
name: Sobey, C.
name: Van Eck, C. L.
name: Horellou, C.
name: Beck, R.
name: Bilicki, M.
name: Bourke, S.
name: Botteon, A.
name: Croston, J. H.
name: Drabent, A.
name: Duncan, K.
name: Heesen, V.
name: Ideguchi, S.
name: Kirwan, M.
name: Lawlor, L.
name: Mingo, B.
name: Nikiel-Wroczyński, B.
name: Piotrowska, J.
name: Scaife, A. M. M.
name: van Weeren, R. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A Faraday rotation measure (RM) catalogue, or RM Grid, is a valuable resource for the study of cosmic magnetism. Using the second data release (DR2) from the LOFAR Two-metre Sky Survey (LoTSS), we have produced a catalogue of 2461 extragalactic high-precision RM values across 5720 deg$^{2}$ of sky (corresponding to a polarized source areal number density of $\sim$0.43 deg$^{-2}$). The linear polarization and RM properties were derived using RM synthesis from the Stokes $Q$ and $U$ channel images at an angular resolution of 20'' across a frequency range of 120 to 168 MHz with a channel bandwidth of 97.6 kHz. The fraction of total intensity sources ($>1$ mJy beam$^{-1}$) found to be polarized was $\sim$0.2%. The median detection threshold was 0.6 mJy beam$^{-1}$ ($8σ_{QU}$), with a median RM uncertainty of 0.06 rad m$^{-2}$ (although a systematic uncertainty of up to 0.3 rad m$^{-2}$ is possible, after the ionosphere RM correction). The median degree of polarization of the detected sources is 1.8%, with a range of 0.05% to 31%. Comparisons with cm-wavelength RMs indicate minimal amounts of Faraday complexity in the LoTSS detections, making them ideal sources for RM Grid studies. Host galaxy identifications were obtained for 88% of the sources, along with redshifts for 79% (both photometric and spectroscopic), with the median redshift being 0.6. The focus of the current catalogue was on reliability rather than completeness, and we expect future versions of the LoTSS RM Grid to have a higher areal number density. In addition, 25 pulsars were identified, mainly through their high degrees of linear polarization.
description: 20 pages, 23 figures, 3 tables. Accepted for publication in MNRAS. Go to https://lofar-mksp.org/data/ to download the catalogue and associated data products
Developing the Ability to Solve Mathematical Problems on Factorization of Polynomials of Mathayomsuksa 2 Students Using STAD Cooperative Learning Management Technique
Creators: name: Nattarud Arsapa
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2023
Subjects: subject: Development
subject: Problem-solving
subject: Mathematics
subject: FOS: Mathematics
subject: Polynomial Factorization

description: Interdisciplinary Academic and Research Journal, 3, 5, 851-866
Time-dependent quantum transport through an interacting quantum dot beyond sequential tunneling: second-order quantum rate equations
Creators: name: Dong, Bing
name: Ding, G. H.
name: Lei, X. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A general theoretical formulation for the effect of a strong on-site Coulomb interaction on the time-dependent electron transport through a quantum dot under the influence of arbitrary time-varying bias voltages and/or external fields is presented, based on slave bosons and the Keldysh nonequilibrium Green's function (GF) techniques. To avoid the difficulties of computing double-time GFs, we generalize the propagation scheme recently developed by Croy and Saalmann to combine the auxiliary-mode expansion with the celebrated Lacroix's decoupling approximation in dealing with the second-order correlated GFs and then establish a closed set of coupled equations of motion, called second-order quantum rate equations (SOQREs), for exact description of transient dynamics of electron correlated tunneling. We verify that the stationary solution of our SOQREs is able to correctly describe the Kondo effect on a qualitative level. Moreover, a comparison with other methods, such as the second-order von Neumann approach and Hubbard-I approximation, is performed. As illustrations, we investigate the transient current behaviors in response to a step voltage pulse and a harmonic driving voltage, and linear admittance as well, in the cotunneling regime.
description: 16 pages, 9 figures
Fully Elman Neural Network: A Novel Deep Recurrent Neural Network Optimized by an Improved Harris Hawks Algorithm for Classification of Pulmonary Arterial Wedge Pressure
Creators: name: Fetanat, Masoud
name: Stevens, Michael
name: Jain, Pankaj
name: Hayward, Christopher
name: Meijering, Erik
name: Lovell, Nigel H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Heart failure (HF) is one of the most prevalent life-threatening cardiovascular diseases in which 6.5 million people are suffering in the USA and more than 23 million worldwide. Mechanical circulatory support of HF patients can be achieved by implanting a left ventricular assist device (LVAD) into HF patients as a bridge to transplant, recovery or destination therapy and can be controlled by measurement of normal and abnormal pulmonary arterial wedge pressure (PAWP). While there are no commercial long-term implantable pressure sensors to measure PAWP, real-time non-invasive estimation of abnormal and normal PAWP becomes vital. In this work, first an improved Harris Hawks optimizer algorithm called HHO+ is presented and tested on 24 unimodal and multimodal benchmark functions. Second, a novel fully Elman neural network (FENN) is proposed to improve the classification performance. Finally, four novel 18-layer deep learning methods of convolutional neural networks (CNNs) with multi-layer perceptron (CNN-MLP), CNN with Elman neural networks (CNN-ENN), CNN with fully Elman neural networks (CNN-FENN), and CNN with fully Elman neural networks optimized by HHO+ algorithm (CNN-FENN-HHO+) for classification of abnormal and normal PAWP using estimated HVAD pump flow were developed and compared. The estimated pump flow was derived by a non-invasive method embedded into the commercial HVAD controller. The proposed methods are evaluated on an imbalanced clinical dataset using 5-fold cross-validation. The proposed CNN-FENN-HHO+ method outperforms the proposed CNN-MLP, CNN-ENN and CNN-FENN methods and improved the classification performance metrics across 5-fold cross-validation. The proposed methods can reduce the likelihood of hazardous events like pulmonary congestion and ventricular suction for HF patients and notify identified abnormal cases to the hospital, clinician and cardiologist.
On the Optimality in General Sense for Odd-Block Search
Creators: name: Chen, Mu-Fa
name: Huang, Dan-Hua
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90B40

description: In his classical article[3](1953), J.Kiefer introduced the Fibonacci search as a direct optimal method. The optimality was proved under the restriction: the total number of tests is given in advance and fixed. To avoid this restriction, some different concepts of optimality were proposed and some corresponding optimal me\-thods were obtained in [1], [2], [5] and [6]. In particular, the even-block search was treated in [1]. This paper deals with the odd-block search. The main result is Theorem (1.15).
description: Typos are corrected in this version
The Cooperation of the Population of Isan in Solid Waste Management: An Investigation Undertaken at the Isan Subdistrict Municipality Mueng Buriram District Buriram Province
Creators: name: Kanlaphat Pralomluck
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2023
Subjects: Participation
Solid Waste Management
Public Media

description: Interdisciplinary Academic and Research Journal, 3, 5, 881-898
The hidden quantum origin of gauge connections
Creators: name: Patrascu, Andrei Tudor
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A fibre bundle viewpoint of gauge field theories is reviewed with focus on a possible quantum interpretation. The fundamental quantum properties of non-separability of state spaces is considered in the context of defining the connection on the fibre bundle, leading to an application of the quantum principles to the geometrical and topological definition of gauge theories. As a result, one could justifiably ask oneself if all interactions of the standard model, and perhaps even classical gravity have some quantum component after all. I employ a standard fibre bundle approach to introduce gauge theories, albeit it is known that a quantum bundle exists, simply because the main scope is to show that in the usual way in which we formulate classical gauge theories one can find quantum aspects that have been unknown until now. In a sense, I will try to justify the assessment that if we are to allow for gauge fields and parallel transport, we may have to allow at least some level of quantumness even in our classical gauge theories. The main statement is that propagation of interactions in spacetime is a quantum phenomenon.
description: Accepted for publication in this form in Physica Scripta
TOI-269 b: An eccentric sub-Neptune transiting a M2 dwarf revisited with ExTrA
Creators: name: Hellier, C.
name: Otegi, J.F.
name: Kern, P.
name: Ziegler, C.
name: West, R.G.
name: Latham, D.W.
name: Gluck, L.
name: Roux, A.
name: Lafrasse, S.
name: Waalkes, W.C.
name: Udry, S.
name: Wünsche, A.
name: Stadler, E.
name: Figueira, P.
name: Feautrier, P.
name: Helled, R.
name: De Medeiros, J.R.
name: Pepe, F.
name: Gaisne, G.
name: Gan, T.
name: Curaba, S.
name: Artigau, E.
name: Collins, K.I.
name: Melo, C.
name: Twicken, J.D.
name: Cointepas, M.
name: Wyttenbach, A.
name: Rabou, P.
name: Moulin, T.
name: Dorn, C.
name: Anderson, D.R.
name: Astudillo-Defru, N.
name: Lovis, C.
name: Delboulbé, A.
name: Doyon, R.
name: Jocou, L.
name: Ségransan, D.
name: Canto Martins, B.L.
name: Santos, N.C.
name: Winn, J.
name: Maurel, D.
name: Magnard, Y.
name: Almenara, J.M.
name: Charbonneau, D.
name: Murgas, F.
name: Ting, E.B.
name: Diáz, R.F.
name: Bonfils, X.
name: Law, N.
name: Leão, I.C.
name: Correia, J.-J.
name: Delfosse, X.
name: Jenkins, J.M.
name: Ricker, G.
name: Collins, K.A.
name: Seager, S.
name: Mann, A.W.
name: Rochat, S.
name: Rodriguez, D.R.
name: Bouchy, F.
name: Vanderspek, R.
name: Forveille, T.
Publisher: name: EDP Sciences
Year: 2021

description: We present the confirmation of a new sub-Neptune close to the transition between super-Earths and sub-Neptunes transiting the M2 dwarf TOI-269 (TIC 220 479 565, V = 14.4 mag, J = 10.9 mag, Ro = 0.40 Ro, Mo = 0.39 Mo, d = 57 pc). The exoplanet candidate has been identified in multiple TESS sectors, and validated with high-precision spectroscopy from HARPS and ground-based photometric follow-up from ExTrA and LCO-CTIO. We determined mass, radius, and bulk density of the exoplanet by jointly modeling both photometry and radial velocities with juliet. The transiting exoplanet has an orbital period of P = 3.6977104 ± 0.0000037 days, a radius of 2.77 ± 0.12 R·, and a mass of 8.8 ± 1.4 M·. Since TOI-269 b lies among the best targets of its category for atmospheric characterization, it would be interesting to probe the atmosphere of this exoplanet with transmission spectroscopy in order to compare it to other sub-Neptunes. With an eccentricity e = 0.425-0.086+0.082, TOI-269 b has one of the highest eccentricities of the exoplanets with periods less than 10 days. The star being likely a few Gyr old, this system does not appear to be dynamically young. We surmise TOI-269 b may have acquired its high eccentricity as it migrated inward through planet-planet interactions.
The SOUX AGN Sample: SDSS-XMM-Newton Optical, Ultraviolet and X-ray selected active galactic nuclei spanning a wide range of parameter space -- Sample definition
Creators: name: Kynoch, Daniel
name: Mitchell, Jake A. J.
name: Ward, Martin J.
name: Done, Chris
name: Lusso, Elisabeta
name: Landt, Hermine
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We assemble a sample of 696 type 1 AGN up to a redshift of $z=2.5$, all of which have an SDSS spectrum containing at least one broad emission line (H $α$, H $β$ or Mg II) and an XMM-Newton X-ray spectrum containing at least 250 counts in addition to simultaneous optical/ultraviolet photometry from the XMM Optical Monitor. Our sample includes quasars and narrow-line Seyfert 1s: thus our AGN span a wide range in luminosity, black hole mass and accretion rate. We determine single-epoch black hole mass relations for the three emission lines and find that they provide broadly consistent mass estimates whether the continuum or emission line luminosity is used as the proxy for the broad emission line region radius. We explore variations of the UV/X-ray energy index $α_\mathrm{ox}$ with the UV continuum luminosity and with black hole mass and accretion rate, and make comparisons to the physical quasar spectral energy distribution (SED) model QSOSED. The majority of the AGN in our sample lie in a region of parameter space with $0.02
description: 23 pages, 24 figures and 10 tables. Accepted for publication in MNRAS
DREAM I. Orbital architecture orrery
Creators: name: Bourrier, V.
name: Attia, O.
name: Mallonn, M.
name: Marret, A.
name: Lendl, M.
name: Konig, P. -C.
name: Krenn, A.
name: Cretignier, M.
name: Allart, R.
name: Henry, G.
name: Bryant, E.
name: Leleu, A.
name: Nielsen, L.
name: Hebrard, G.
name: Hara, N.
name: Ehrenreich, D.
name: Seidel, J.
name: Santos, L. dos
name: Lovis, C.
name: Bayliss, D.
name: Cegla, H. M.
name: Dumusque, X.
name: Boisse, I.
name: Boucher, A.
name: Bouchy, F.
name: Pepe, F.
name: Lavie, B.
name: Cerda, J. Rey
name: Segransan, D.
name: Udry, S.
name: Vrignaud, T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The distribution of close-in exoplanets is shaped by a complex interplay between atmospheric and dynamical processes. The Desert-Rim Exoplanets Atmosphere and Migration (DREAM) program aims at disentangling those processes through the study of the hot Neptune desert, whose rim hosts planets that are undergoing, or survived, atmospheric evaporation and orbital migration. In this first paper, we use the Rossiter-McLaughlin Revolutions (RMR) technique to investigate the orbital architecture of 14 close-in planets ranging from mini-Neptune to Jupiter-size and covering a broad range of orbital distances. While no signal is detected for the two smallest planets, we were able to constrain the sky-projected spin--orbit angle of six planets for the first time, to revise its value for six others, and, thanks to constraints on the stellar inclination, to derive the 3D orbital architecture in seven systems. These results reveal a striking three-quarters of polar orbits in our sample, all being systems with a single close-in planet but of various stellar and planetary types. High-eccentricity migration is favored to explain such orbits for several evaporating warm Neptunes, supporting the role of late migration in shaping the desert and populating its rim. Putting our measurements in the wider context of the close-in planet population will be useful to investigate the various processes shaping their architectures.
description: 25 pages and 12 figures (plus Appendix)
Pulsed laser ablation in liquid of sp-carbon chains: status and recent advances
Creators: name: Marabotti, Pietro
name: Peggiani, Sonia
name: Vidale, Alessandro
name: Casari, Carlo Spartaco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This review provides a discussion of the current state of research on sp-carbon chains synthesized by pulsed laser ablation in liquid. In recent years, pulsed laser ablation in liquid (PLAL) has been widely employed for polyynes synthesis thanks to its flexibility with varying laser parameters, solvents, and targets. This allows the control of sp-carbon chains properties as yield, length, termination and stability. Although many reviews related to PLAL have been published, a comprehensive work reporting the current status and advances related to the synthesis of sp-carbon chains by PLAL is still missing. Here we first review the principle of PLAL and the mechanisms of formation of sp-carbon chains. Then we discuss the role of laser fluence (i.e. energy density), solvent, and target for sp-carbon chains synthesis. Lastly, we report the progress related to the prolonged stability of sp-carbon chains by PLAL encapsulated in polymeric matrices. This review will be a helpful guide for researchers interested in synthesizing sp-carbon chains by PLAL.
ALMA Multi-line Imaging of the Nearby Starburst Galaxy NGC 253
Creators: name: Meier, David S.
name: Walter, Fabian
name: Bolatto, Alberto D.
name: Leroy, Adam K.
name: Ott, Jürgen
name: Rosolowsky, Erik
name: Veilleux, Sylvain
name: Warren, Steven R.
name: Weiss, Axel
name: Zwaan, Martin A.
name: Zschaechner, Laura K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present spatially resolved ($\sim$50 pc) imaging of molecular gas species in the central kiloparsec of the nearby starburst galaxy NGC 253, based on observations taken with the Atacama Large Millimeter/submillimeter Array (ALMA). A total of 50 molecular lines are detected over a 13 GHz bandwidth imaged in the 3 mm band. Unambiguous identifications are assigned for 27 lines. Based on the measured high CO/C$^{17}$O isotopic line ratio ($\gtrsim$350), we show that $^{12}$CO(1-0) has moderate optical depths. A comparison of the HCN and HCO$^{+}$ with their $^{13}$C-substituted isotopologues shows that the HCN(1-0) and HCO$^{+}$(1-0) lines have optical depths at least comparable to CO(1-0). H$^{13}$CN/H$^{13}$CO$^{+}$ (and H$^{13}$CN/HN$^{13}$C) line ratios provide tighter constraints on dense gas properties in this starburst. SiO has elevated abundances across the nucleus. HNCO has the most distinctive morphology of all the bright lines, with its global luminosity dominated by the outer parts of the central region. The dramatic variation seen in the HNCO/SiO line ratio suggests that some of the chemical signatures of shocked gas are being erased in the presence of dominating central radiation fields (traced by C$_{2}$H and CN). High density molecular gas tracers (including HCN, HCO$^+$, and CN) are detected at the base of the molecular outflow. We also detect hydrogen $β$ recombination lines that, like their $α$ counterparts, show compact, centrally peaked morphologies, distinct from the molecular gas tracers. A number of sulfur based species are mapped (CS, SO, NS, C$_{2}$S, H$_{2}$CS and CH$_{3}$SH) and have morphologies similar to SiO.
description: 20 pages, 10 figures, accepted to the Astrophysical Journal
Mysterious Dust-emitting Object Orbiting TIC 400799224
Creators: name: Law, N.M.
name: Lacourse, D.M.
name: Kruse, E.
name: Barclay, T.
name: Jacobs, T.L.
name: Schlieder, J.E.
name: Vanderburg, A.
name: Collins, K.A.
name: Borkovits, T.
name: Kostov, V.B.
name: Gagliano, R.
name: Olmschenk, G.
name: Chiang, E.
name: Corbett, H.
name: Powell, B.P.
name: Gary, B.L.
name: Shporer, A.
name: Goeke, E.
name: Schmitt, A.R.
name: Omohundro, M.
name: Rappaport, S.A.
name: Rodriguez, J.E.
name: Kristiansen, M.H.
name: Soto, A.V.
name: Schwengeler, H.M.
name: Terentev, I.A.
name: Tokovinin, A.
Publisher: name: American Astronomical Society
Year: 2021

description: We report the discovery of a unique object of uncertain nature - but quite possibly a disintegrating asteroid or minor planet - orbiting one star of the widely separated binary TIC 400799224. We initially identified the system in data from TESS Sector 10 via an abnormally shaped fading event in the light curve (hereafter "dips"). Follow-up speckle imaging determined that TIC 400799224 is actually two stars of similar brightness at 0.″62 separation, forming a likely bound binary with projected separation of ∼300 au. We cannot yet determine which star in the binary is host to the dips in flux. ASAS-SN and Evryscope archival data show that there is a strong periodicity of the dips at ∼19.77 days, leading us to believe that an occulting object is orbiting the host star, though the duration, depth, and shape of the dips vary substantially. Statistical analysis of the ASAS-SN data shows that the dips only occur sporadically at a detectable threshold in approximately one out of every three to five transits, lending credence to the possibility that the occulter is a sporadically emitted dust cloud. The cloud is also fairly optically thick, blocking up to 37% or 75% of the light from the host star, depending on the true host. Further observations may allow for greater detail to be gleaned as to the origin and composition of the occulter, as well as to a determination of which of the two stars comprising TIC 400799224 is the true host star of the dips.
Knowledge, Physical Activities, and Healthy Food Consumption Behavior Towards Nutritional Status of Undergraduate Students at Ramkhamhaeng University under a New Normal Lifestyle
Creators: name: Muanpare Rattanasiri
Publisher: name: DR.KEN Institute of Academic Development and Promotion
Year: 2023
Subjects: Knowledge of Healthy Foods
Physical Activities
Healthy Food Consumption Behavior
Nutritional
Living in a New Normal

description: Interdisciplinary Academic and Research Journal, 3, 5, 899-918
People Tracking in Panoramic Video for Guiding Robots
Creators: name: Bacchin, Alberto
name: Berno, Filippo
name: Menegatti, Emanuele
name: Pretto, Alberto
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: A guiding robot aims to effectively bring people to and from specific places within environments that are possibly unknown to them. During this operation the robot should be able to detect and track the accompanied person, trying never to lose sight of her/him. A solution to minimize this event is to use an omnidirectional camera: its 360° Field of View (FoV) guarantees that any framed object cannot leave the FoV if not occluded or very far from the sensor. However, the acquired panoramic videos introduce new challenges in perception tasks such as people detection and tracking, including the large size of the images to be processed, the distortion effects introduced by the cylindrical projection and the periodic nature of panoramic images. In this paper, we propose a set of targeted methods that allow to effectively adapt to panoramic videos a standard people detection and tracking pipeline originally designed for perspective cameras. Our methods have been implemented and tested inside a deep learning-based people detection and tracking framework with a commercial 360° camera. Experiments performed on datasets specifically acquired for guiding robot applications and on a real service robot show the effectiveness of the proposed approach over other state-of-the-art systems. We release with this paper the acquired and annotated datasets and the open-source implementation of our method.
description: Accepted to 17th International Conference on Intelligent Autonomous Systems (IAS-17)
Morphological changes of amphiphilic molecular assemblies induced by chemical reaction
Creators: name: Nakagawa, Koh M.
name: Noguchi, Hiroshi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Shape transformations of amphiphilic molecular assemblies induced by chemical reaction are studied using coarse-grained molecular simulations. A binding reaction between hydrophilic and hydrophobic molecules is considered. It is found that the reaction induces transformation of an oil droplet to a tubular vesicle via bicelles and vesicles with discoidal arms. The discoidal arms close into vesicles, which are subsequently fused into the tubular vesicle. Under the chemical reaction, the bicelle-to-vesicle transition occurs at smaller sizes than in the absence of the hydrophobic molecules. It is revealed that the enhancement of this transition is due to embedded hydrophobic particles that reduce the membrane bending rigidity.
description: 9 pages, 10 figures
Pushing the Limits of Learning-based Traversability Analysis for Autonomous Driving on CPU
Creators: name: Fusaro, Daniel
name: Olivastri, Emilio
name: Evangelista, Daniele
name: Imperoli, Marco
name: Menegatti, Emanuele
name: Pretto, Alberto
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Self-driving vehicles and autonomous ground robots require a reliable and accurate method to analyze the traversability of the surrounding environment for safe navigation. This paper proposes and evaluates a real-time machine learning-based Traversability Analysis method that combines geometric features with appearance-based features in a hybrid approach based on a SVM classifier. In particular, we show that integrating a new set of geometric and visual features and focusing on important implementation details enables a noticeable boost in performance and reliability. The proposed approach has been compared with state-of-the-art Deep Learning approaches on a public dataset of outdoor driving scenarios. It reaches an accuracy of 89.2% in scenarios of varying complexity, demonstrating its effectiveness and robustness. The method runs fully on CPU and reaches comparable results with respect to the other methods, operates faster, and requires fewer hardware resources.
description: Accepted to 17th International Conference on Intelligent Autonomous Systems (IAS-17)
The Metaverse from a Multimedia Communications Perspective
Creators: name: Dong, Haiwei
name: Lee, Jeannie S. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Multimedia (cs.MM)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: eXtended reality (XR) technologies such as virtual reality and 360° stereoscopic streaming enable the concept of the Metaverse, an immersive virtual space for collaboration and interaction. To ensure high fidelity display of immersive media, the bandwidth, latency and network traffic patterns will need to be considered to ensure a user's Quality of Experience (QoE). In this article, examples and calculations are explored to demonstrate the requirements of the abovementioned parameters. Additionally, future methods such as network-awareness using reinforcement learning (RL) and XR content awareness using spatial or temporal difference in the frames could be explored from a multimedia communications perspective.
A single liquid chromatography procedure to concentrate, separate and collect size-selected polyynes produced by pulsed laser ablation in water
Creators: name: Peggiani, Sonia
name: Facibeni, Anna
name: Marabotti, Pietro
name: Vidale, Alessandro
name: Scotti, Stefano
name: Casari, Carlo S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Polyynes are linear carbon chains characterized by alternated single and triple bonds and terminated by hydrogen or other terminal substituents. They can be synthesized by pulsed laser ablation in liquid (PLAL) as a scalable, cost-effective, and fast physical technique. Water can be employed as a solvent for PLAL to avoid toxicity problems and to reduce costs compared to organic solvents. However, in this case, the production yield of polyynes reached is extremely low and prevents further characterization and implementation in new functional materials. In this work, we synthesized polyynes by pulsed laser ablation in water and we optimized the process parameters to improve the yield of polyynes by PLAL. Then, we developed a procedure entirely based on reversed-phase high-performance liquid chromatography (RP-HPLC) which effectively enables the concentration, separation and collection of polyynes according to their length. Since the polyynes sample is an aqueous solution, we could inject it directly into the RP-HPLC column without the dilution step required in the case of a sample in an organic solvent. Thanks to our single RP-HPLC procedure, it is possible to highly increase the concentration and separately characterize different size-selected polyynes for further use in functional materials.
description: 8 pages, 4 figures
ASKurz/ecological_fallacy_Thorndike: Connect zenodo
Creators: name: A. Solomon Kurz
Publisher: name: Zenodo
Year: 2020
Subjects: correlation
ecological fallacy
statistics

description: In 1939, E. L. Thorndike gave an example of what eventually became known as the ecological fallacy. Here is his example.
description: url: https://github.com/ASKurz/ecological_fallacy_Thorndike
The first stars: CEMP--no stars and signatures of spinstars
Creators: name: Maeder, Andre
name: Meynet, Georges
name: Chiappini, Cristina
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) The CEMP--no stars are "carbon-enhanced-metal-poor" stars that in principle show no evidence of s-- and r--elements from neutron captures. We try to understand the origin and nucleosynthetic site of their peculiar CNO, Ne--Na, and Mg--Al abundances. We compare the observed abundances to the nucleosynthetic predictions of AGB models and of models of rotating massive stars with internal mixing and mass loss. We also analyze the different behaviors of $α$-- and CNO--elements, as well the abundances of elements involved in the Ne--Na and Mg--Al cycles. We show that CEMP-no stars exhibit products of He--burning that have gone through partial mixing and processing by the CNO cycle, producing low $^{12}$C/$^{13}$C and a broad variety of [C/N] and [O/N] ratios. From a $^{12}$C/$^{13}$C vs. [C/N] diagram, we conclude that neither the yields of AGB stars (in binaries or not) nor the yields of classic supernovae can fully account for the observed CNO abundances in CEMP-no stars. Better agreement is obtained once the chemical contribution by stellar winds of fast-rotating massive stars is taken into account, where partial mixing takes place, leading to various amounts of CNO being ejected. CEMP--no stars present a wide variety in the [C/Fe], [N/Fe], [O/Fe], [Na/Fe], [Mg/Fe], [Al/Fe], and [Sr/Fe] ratios. We show that back-and-forth, partial mixing between the He-- and H--regions may account for this variety. Some s--elements, mainly of the first peak, may even be produced by these processes in a small fraction of the CEMP--no stars. We propose a classification scheme for the CEMP--no and low--s stars, based on the changes in composition produced by these successive back-and-forth mixing motions.
description: 17 pages, 9 figures, 2 tables, in press for Astronomy and Astrophysics
Nature of ground states in one-dimensional electron-phonon Hubbard models at half-filling
Creators: name: Bakrim, Hassan
name: Bourbonnais, Claude
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The renormalization group technique is applied to one-dimensional electron-phonon Hubbard models at half-filling and zero temperature. For the Holstein-Hubbard model, the results of one-loop calculations are congruent with the phase diagram obtained by quantum Monte Carlo simulations in the $(U,g_{\rm ph})$ plane for the phonon-mediated interaction $g_{\rm ph}$ and the Coulomb interaction $U$. The incursion of an intermediate phase between a fully gapped charge-density-wave state and a Mott antiferromagnet is supported along with the growth of its size with the molecular phonon frequency $ω_0$. We find additional phases enfolding the base boundary of the intermediate phase. A Luttinger liquid line is found below some critical $ U^*\approx g^*_{\rm ph}$, followed at larger $U\sim g_{\rm ph}$ by a narrow region of bond-order-wave ordering which is either charge or spin gapped depending on $U$. For the Peierls-Hubbard model, the region of the $(U,g_{\rm ph})$ plane with a fully gapped Peierls-bond-order-wave state shows a growing domination over the Mott gapped antiferromagnet as the Debye frequency $ω_D$ decreases. A power law dependence $g_{\rm ph} \sim U^{2η}$ is found to map out the boundary between the two phases, whose exponent is in good agreement with the existing quantum Monte Carlo simulations performed when a finite nearest-neighbor repulsion term $V$ is added to the Hubbard interaction.
description: 11 pages, 10 figures
Revealing the finite-frequency response of a bosonic quantum impurity
Creators: name: Léger, Sébastien
name: Sépulcre, Théo
name: Fraudet, Dorian
name: Buisson, Olivier
name: Naud, Cécile
name: Hasch-Guichard, Wiebke
name: Florens, Serge
name: Snyman, Izak
name: Basko, Denis M.
name: Roch, Nicolas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum impurities are ubiquitous in condensed matter physics and constitute the most stripped-down realization of many-body problems. While measuring their finite-frequency response could give access to key characteristics such as excitations spectra or dynamical properties, this goal has remained elusive despite over two decades of studies in nanoelectronic quantum dots. Conflicting experimental constraints of very strong coupling and large measurement bandwidths must be met simultaneously. We get around this problem using cQED tools, and build a precisely characterized quantum simulator of the boundary sine-Gordon model, a non-trivial bosonic impurity problem. We succeeded to fully map out the finite frequency linear response of this system. Its reactive part evidences a strong renormalisation of the nonlinearity at the boundary in agreement with non-perturbative calculations. Its dissipative part reveals a dramatic many-body broadening caused by multi-photon conversion. The experimental results are matched quantitatively to a resummed diagrammatic calculation based on a microscopically calibrated model. Furthermore, we push the device into a regime where diagrammatic calculations break down, which calls for more advanced theoretical tools to model many-body quantum circuits. We also critically examine the technological limitations of cQED platforms to reach universal scaling laws. This work opens exciting perspectives for the future such as quantifying quantum entanglement in the vicinity of a quantum critical point or accessing the dynamical properties of non-trivial many-body problems.
description: 39 pages, 14 figures. The final version clarifies the position of our study w.r.t previous works
A scalable architecture for distributed receive beamforming: analysis and experimental demonstration
Creators: name: Quitin, Francois
name: Irish, Andrew T.
name: Madhow, Upamanyu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We propose, analyze and demonstrate an architecture for scalable cooperative reception. In a cluster of N + 1 receive nodes, one node is designated as the final receiver, and the N other nodes act as amplify-and-forward relays which adapt their phases such that the relayed signals add up constructively at the designated receiver. This yields received SNR scaling linearly with N, while avoiding the linear increase in overhead incurred by a direct approach in which received signals are separately quantized and transmitted for centralized processing. By transforming the task of long-distance distributed receive beamforming into one of local distributed transmit beamforming, we can leverage a scalable one-bit feedback algorithm for phase synchronization. We show that time division between the long-distance and local links eliminates the need for explicit frequency synchronization. We provide an analytical framework, whose results closely match Monte Carlo simulations, to evaluate the impact of phase noise due to relaying delay on the performance of the one-bit feedback algorithm. Experimental results from our prototype implementation on software-defined radios demonstrate the expected gains in received signal strength despite significant oscillator drift, and are consistent with results from our analytical framework.
description: submitted to IEEE Transactions on Wireless Communications
TIC 172900988: A transiting circumbinary planet detected in one sector of TESS data
Creators: name: Kielkopf, J.F.
name: Winn, J.N.
name: Gilbert, E.A.
name: Dixon, S.
name: Yenawine, M.
name: Hintz, E.G.
name: Maxted, P.F.L.
name: Jenkins, J.
name: Quimby, R.
name: Kidwell, R.C., Jr.
name: Wilson, R.F.
name: Olmschenk, G.
name: Law, N.M.
name: Vanderspek, R.
name: Wood, D.
name: Ricker, G.
name: Majewski, S.R.
name: Rowe, J.
name: Barclay, T.
name: Montet, B.T.
name: Caldwell, D.A.
name: Stephens, D.C.
name: Bergeron, S.
name: Lissauer, J.J.
name: Walter, B.S.
name: Colón, K.D.
name: Torres, G.
name: Stevens, D.J.
name: Kruse, E.
name: Conti, D.M.
name: Hébrard, G.
name: Murgas, F.
name: Schwarz, R.P.
name: Guerra, P.
name: Endl, M.
name: Jensen, E.L.N.
name: Kopparapu, R.
name: Pepper, J.
name: Quinn, S.N.
name: Otero, S.
name: Boyce, P.
name: Boisse, I.
name: Standing, M.R.
name: Schlieder, J.
name: Mazeh, T.
name: Collins, K.I.
name: Howard, W.S.
name: Kane, S.R.
name: Cochran, W.
name: Orosz, J.A.
name: Beatty, T.G.
name: Christiansen, J.
name: Hellier, C.
name: Shporer, A.
name: Triaud, A.H.M.J.
name: MacQueen, P.
name: Santerne, A.
name: Ting, E.B.
name: Lund, M.B.
name: Fűrész, G.
name: Ciardi, D.R.
name: Herman, J.
name: Christiansen, C.B.
name: Wiley, E.
name: Deleuil, M.
name: James, D.J.
name: Kostov, V.B.
name: Collins, K.A.
name: Welsh, W.F.
name: Fausnaugh, M.
name: Sairam, L.
name: Haghighipour, N.
name: Rodriguez, J.E.
name: Doyle, L.
name: Bieryla, A.
name: Quintana, E.
name: Buchheim, R.
name: Martin, D.
name: Agol, E.
name: Seager, S.
name: Nelson, M.
name: Powell, B.P.
name: Richmond, M.
name: Latham, D.W.
name: Li, G.
name: Stassun, K.G.
name: Ulowetz, J.
name: Quarles, B.
Publisher: name: American Astronomical Society
Year: 2021

description: We report the first discovery of a transiting circumbinary planet detected from a single sector of Transiting Exoplanet Survey Satellite (TESS) data. During Sector 21, the planet TIC 172900988b transited the primary star and then five days later it transited the secondary star. The binary is itself eclipsing, with a period P ≈ 19.7 days and an eccentricity e ≈ 0.45. Archival data from ASAS-SN, Evryscope, KELT, and SuperWASP reveal a prominent apsidal motion of the binary orbit, caused by the dynamical interactions between the binary and the planet. A comprehensive photodynamical analysis of the TESS, archival and follow-up data yields stellar masses and radii of M1 = 1.2384 ± 0.0007 Me and R1 = 1.3827 ± 0.0016 Re for the primary and M2 = 1.2019 ± 0.0007 Me and R2 = 1.3124 ± 0.0012 Re for the secondary. The radius of the planet is R3 = 11.25 ± 0.44 R (1.004 ± 0.039RJup). The planet's mass and orbital properties are not uniquely determined-there are six solutions with nearly equal likelihood. Specifically, we find that the planet's mass is in the range of 824 M3 981 M (2.65 M3 3.09MJup), its orbital period could be 188.8, 190.4, 194.0, 199.0, 200.4, or 204.1 days, and the eccentricity is between 0.02 and 0.09. At V = 10.141 mag, the system is accessible for high-resolution spectroscopic observations, e.g., the Rossiter-McLaughlin effect and transit spectroscopy.
The Development of Learning Management Activities Using Design Concepts to Enhance Learning Management Plan Designing Ability of Primary Education Students Ramkhamhaeng University
Creators: name: Thayida Lertchanadecha
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2023
Subjects: Design Concepts
Lesson Plan Design
Plan Designing Ability

description: Interdisciplinary Academic and Research Journal, 3, 5, 977-996
Techniques for combining fast local decoders with global decoders under circuit-level noise
Creators: name: Chamberland, Christopher
name: Goncalves, Luis
name: Sivarajah, Prasahnt
name: Peterson, Eric
name: Grimberg, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Implementing algorithms on a fault-tolerant quantum computer will require fast decoding throughput and latency times to prevent an exponential increase in buffer times between the applications of gates. In this work we begin by quantifying these requirements. We then introduce the construction of local neural network (NN) decoders using three-dimensional convolutions. These local decoders are adapted to circuit-level noise and can be applied to surface code volumes of arbitrary size. Their application removes errors arising from a certain number of faults, which serves to substantially reduce the syndrome density. Remaining errors can then be corrected by a global decoder, such as Blossom or Union Find, with their implementation significantly accelerated due to the reduced syndrome density. However, in the circuit-level setting, the corrections applied by the local decoder introduce many vertical pairs of highlighted vertices. To obtain a low syndrome density in the presence of vertical pairs, we consider a strategy of performing a syndrome collapse which removes many vertical pairs and reduces the size of the decoding graph used by the global decoder. We also consider a strategy of performing a vertical cleanup, which consists of removing all local vertical pairs prior to implementing the global decoder. Lastly, we estimate the cost of implementing our local decoders on Field Programmable Gate Arrays (FPGAs).
description: 28 pages, 24 figures. Comments welcome! V2 Contains a more detailed FPGA analysis
Public Sector Innovation: Concepts of Land Valuation System Development for Economic Drive in Amnat Charoen Province
Creators: name: Subunn Ieamvijarn
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2023
Subjects: Public Sector Innovation
Economic Drive
Land Valuation System Development

description: Interdisciplinary Academic and Research Journal, 3, 5, 997-1014