cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
OPEN GREEN an der Hochschule Magdeburg‐Stendal
Creators: name: Mey, Günter
name: Regener, Ralf
Publisher: name: Zenodo
Year: 2023

description: Der Beitrag von Prof. Dr. Günter Mey und Ralf Regener mit dem Titel "OPEN GREEN an der Hochschule Magdeburg‐Stendal" war Teil eines Online-Workshops am 21.11.2023, der sich an Verantwortliche in Bibliotheken und der Forschungsadministrationen von Fachhochschulen und Hochschulen für Angewandte Wissenschaften richtete. 
Ziel des Workshops war es, Good-Practice-Beispiele zu Zweitveröffentlichungsservices und dies betreffende Workflows aufzuzeigen, über die rechtlichen Rahmenbedingungen zu informieren und eigene Handlungsspielräume zu entdecken bzw. Ideen für Kooperationsangebote zu eröffnen.
Accounting for Missing AOD Data with UVAI for Improved Aerosol Forecast in Wildfire/Dust Storm Cases
Creators: name: , Jenny
name: Naphat
name: , Stephanie
name: , Charu
name: Yunyao
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Aerosol Optical Depth (AOD) and UV Aerosol Index (UVAI) are aerosol extinction measures used in air quality forecasts for the amount of aerosol in the air. AOD measures both aerosol absorption and extinction at the visible spectrum but is unable to read areas with clouds/snow, while UVAI is only sensitive to aerosol absorption at the UV spectrum but is not limited to cloud-free areas. In this project I focused on filling missing AOD data with UVAI data using different correlation methods for 2 special cases: 1/15/2021, a thick dust storm around the Texas Panhandle, and 8/7/21 containing part of the 2021 California Dixie fire in NE California. The correlation between TropoMAER UVAI and VIIRS AOD was compared among different distance cutoffs to fire source and latitude/longitude boxes. The boxes worked best for the special cases, yielding correlation results of around r=0.82 for both the dust and fire cases. Using the linear regression equations from the resulting correlations, I replotted the data for both cases, which led to visibly wider coverages compared to the original AOD data. For the fire case specifically, most of the null values in the boxed region in which the correlation was calculated were filled in. In conclusion, the box method seemed to be effective in calculating correlations/regressions that produced plots with significant improvements in AOD coverage, especially for the fire aerosol case. This finding can be useful concerning aerosol forecasts as it addresses a disadvantage of AOD using existing data.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Implications of the Pseudo-Dirac Scenario for Ultra High Energy Neutrinos from GRBs
Creators: name: Esmaili, Arman
name: Farzan, Yasaman
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The source of Ultra High Energy Cosmic Rays (UHECR) is still an unresolved mystery. Up until recently, sources of Gamma Ray Bursts (GRBs) had been considered as a suitable source for UHECR. Within the fireball model, the UHECR produced at GRBs should be accompanied with a neutrino flux detectable at the neutrino telescope such as IceCube. Recently, IceCube has set an upper bound on the neutrino flux accompanied by GRBs about 3.7 times below the prediction. We investigate whether this deficit can be explained by the oscillation of the active neutrinos to sterile neutrinos en route from the source to the detectors within the pseudo-Dirac scenario. We then discuss the implication of this scenario for diffuse supernova relic neutrinos.
description: 14 pages, 5 figures; v2: figures added, discussion improved, matches the version published in JCAP
Investigating Wildfire Impact on Ecosystem in California using NASA MODIS Measurements
Creators: name: , Sophia
name: Xianjun
name: , John
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Wildfires have long been a vital part of the California ecosystem, as they clear dead vegetation. allow for increased soil fertility, and more. However, along with climate change, wildfires in California have become a severe hazard and increasingly harmful to the environment. In particular, wildfires can end up being detrimental to the health of surrounding vegetation in its area of effect, often leading to long-term native vegetation loss. The aim of this study is to analyze the impacts across the time period of 2001-2020 of the ZACA Wildfire in 2007 on vegetation health through a variety of variables, including the Normalized Difference Vegetation Index (NDVI), Vegetation Condition Index (VCI), Thermal Condition Index (TCI), and Vegetation Health Index (VHI). This study is based on an integrated analysis of NASA satellite remote sensing measurements, including Moderate Resolution Imaging Spectroradiometer (MODIS) monthly vegetation index products and land surface temperature products. Analysis of monthly NDVI time series of the ZACA Fire burned area found a large drop in vegetation health in the year of the ZACA fire, 2007, going from a mean NDVI of 0.5613 in 2006 to a mean of 0.4586 in 2007 and eventually, 0.3384 in 2008. The general trend shows a slow incline in vegetation health after the sudden drop in 2007 and 2008 caused by the fire. However, this incline over the course of fifteen years has yet to reach the former mean NDVI values before 2007. A similar trend can be observed with the VCI, TCI, and VHI, all of which face a similar drop through 2007 and 2008. Just like the NDVI, the VCI, TCI, and VHI have yet to catch up to their status before the 2007 ZACA Wildfire. These results demonstrate the impacts of wildfire on vegetation, along with the slow recovery process, providing insightful information on the short-term impacts of wildland fires on ecosystems and the long-term recovery process.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Performance of FAST with an Ultra-Wide Bandwidth Receiver at 500-3300 MHz
Creators: name: Zhang, Chuan-Peng
name: Jiang, Peng
name: Zhu, Ming
name: Pan, Jun
name: Cheng, Cheng
name: Liu, Hong-Fei
name: Zhu, Yan
name: Sun, Chun
name: Collaboration, FAST
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has been running for several years. A new Ultra-Wide Bandwidth (UWB) receiver, simultaneously covering 500-3300 MHz, has been mounted in the FAST feed cabin and passed a series of observational tests. The whole UWB band is separated into four independent bands. Each band has 1048576 channels in total, resulted in a spectral resolution of 1 kHz. At 500-3300 MHz, the antenna gain is around 14.3-7.7 K/Jy, the aperture efficiency is around 0.56-0.30, the system temperature is around 88-130 K, and the HPBW is around 7.6-1.6 arcmin. The measured standard deviation of pointing accuracy is better than ~7.9 arcsec, when zenith angle (ZA) is within 26.4deg. The sensitivity and stability of the UWB receiver are confirmed to satisfy expectation by spectral observations, e.g., HI and OH. The FAST UWB receiver already has a good performance for taking sensitive observations in various scientific goals.
description: 11 pages, 7 figures, 2 tables, published in Research in Astronomy and Astrophysics
Site Records Playa Margines for Old Sites GSRC Sites Gold Flat
Creators: name: Haagen, Jordan
Year: 2020
Subjects: subject: Clark (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3965/clark-county
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: Las Vegas, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/76911/las-vegas-nevada
subject: Nevada (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/919/nevada-state-territory
subject: Nye (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4104/nye-county
subject: Nellis Air Force Base, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/80650/nellis-air-force-base-nevada
subject: S117-4
valueUri: https://core.tdar.org/browse/site-name/110094/s117-4
subject: S117-3
valueUri: https://core.tdar.org/browse/site-name/110096/s117-3
subject: S118-3
valueUri: https://core.tdar.org/browse/site-name/110095/s118-3
subject: S117-2
valueUri: https://core.tdar.org/browse/site-name/110098/s117-2
subject: S118-2
valueUri: https://core.tdar.org/browse/site-name/110097/s118-2
subject: S114-4
valueUri: https://core.tdar.org/browse/site-name/110100/s114-4
subject: S118-1
valueUri: https://core.tdar.org/browse/site-name/110099/s118-1
subject: S117-5
valueUri: https://core.tdar.org/browse/site-name/110102/s117-5
subject: S117-1
valueUri: https://core.tdar.org/browse/site-name/110101/s117-1
subject: A34-2
valueUri: https://core.tdar.org/browse/site-name/110104/a34-2
subject: S118-4
valueUri: https://core.tdar.org/browse/site-name/110103/s118-4
subject: A34-1
valueUri: https://core.tdar.org/browse/site-name/110106/a34-1
subject: S114-3
valueUri: https://core.tdar.org/browse/site-name/110105/s114-3
subject: S114-1
valueUri: https://core.tdar.org/browse/site-name/110108/s114-1
subject: S114-2
valueUri: https://core.tdar.org/browse/site-name/110107/s114-2
subject: S38-2
valueUri: https://core.tdar.org/browse/site-name/110110/s38-2
subject: S134-1
valueUri: https://core.tdar.org/browse/site-name/110109/s134-1
subject: S38-3
valueUri: https://core.tdar.org/browse/site-name/110112/s38-3
subject: S38-1
valueUri: https://core.tdar.org/browse/site-name/110111/s38-1
subject: S94-1
valueUri: https://core.tdar.org/browse/site-name/110114/s94-1
subject: S94-3
valueUri: https://core.tdar.org/browse/site-name/110113/s94-3
subject: S94-2
valueUri: https://core.tdar.org/browse/site-name/110115/s94-2

description: IMACS Site Forms at old GSRC sites for Nellis Air Force Base, Nevada.
Gamma-ray spectra of methane in the positron-electron annihilation process
Creators: name: Ma, Xiaoguang
name: Wang, Feng
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bound electron contribution to the Doppler-shift of gamma-ray spectra in the positron-electron annihilation process of molecular methane has been studied in gas phase. Two accurate ab initio quantum mechanical schemes, i.e. the delocalized molecular orbital (MO) and the localized natural bond orbital (NBO) schemes, are applied to study the multi-centred methane molecule. The present ab initio calculations of methane indicate that the C-H bonds are polarized with the partial negative charge of -0.36 a.u. on the carbon atom and the partial positive charge of +0.09 a.u. on each of the hydrogen atoms. The positively charged hydrogen atoms produce repulsive Coulomb potentials to a positron. Both the MO and NBO schemes further reveal that the 2a1 electrons of methane, that is, the 2a1 electron component of the C-H bonds rather than the whole C-H bonds of methane, predominates the positron-electron annihilation gamma-ray spectra of the molecule. Electrons of a molecule which are dominant the positron-electron annihilation processes are called positrophilic electrons in the present study. It is further shown that the negative electrostatic potential (ESP) of methane facilitates with the density of the positrophilic 2a1 electrons of methane. Other valence electrons (e.g. 1t2) in the C-H bonds play a minor spectator role in the annihilation process of methane.
Timelike and null geodesics in the Schwarzschild space-time: Analytical solutions
Creators: name: Cieślik, Adam
name: Mach, Patryk
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The theory of Schwarzschild geodesics is revisited. Using a theorem due to Weierstrass and Biermann, we derive concise formulas describing all timelike and null trajectories in terms of Weierstrass elliptic functions. The formulation given in this note uses an analogue of the so-called Mino time.
description: 10 pages, 0 figures
Microscopic resolution of the interplay of Kondo screening and superconducting pairing: Mn-phthalocyanine molecules adsorbed on superconducting Pb(111)
Creators: name: Bauer, J.
name: Pascual, J. I.
name: Franke, K. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Magnetic molecules adsorbed on a superconductor give rise to a local competition of Cooper pair and Kondo singlet formation inducing subgap bound states. For Manganese-phthalocyanine molecules on a Pb(111) substrate, scanning tunneling spectroscopy resolves pairs of subgap bound states and two Kondo screening channels. We show in a combined approach of scaling and numerical renormalization group calculations that the intriguing relation between Kondo screening and superconducting pairing is solely determined by the hybridization strength with the substrate. We demonstrate that an effective one-channel Anderson impurity model with a sizable particle-hole asymmetry captures universal and non-universal observations in the system quantitatively. The model parameters and disentanglement of the two screening channels are elucidated by scaling arguments.
description: 8 pages, 4 figures
NASA’s Transiting Exoplanet Survey Satellite Mission Ground-Based Follow-Ups
Creators: name: Yushu
name: , Salma
name: , Kevin
name: , Ian
name: , Peter
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: NASA’s Transiting Exoplanet Survey Satellite (TESS) Mission has found thousands of exoplanets through its all-sky survey. Every detection made by TESS is followed up with a ground-based telescope to either confirm the detection or conclude that it may be a false positive. Through data reduction, aperture photometry, light curve generation, and checking for nearby eclipsing binaries, we analyzed data for numerous planet candidates, such as TOI 3545.01 and TOI 2038.01. Data from TOI 2038.01 showed a plausible ingress, with none of the nearby stars showing clear evidence to be responsible for a false positive. Data from TOI 3545.01 also showed strong evidence for the existence of a transiting body, with nearby reference stars also likely not responsible for a false positive. Analyzing the planet candidates gathered by TESS allows for the efforts of the TESS mission to be translated into the detection of clear false positives and new exoplanets.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Convex hull of n planar Brownian paths: an exact formula for the average number of edges
Creators: name: Randon-Furling, Julien
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We establish an exact formula for the average number of edges appearing on the boundary of the global convex hull of n independent Brownian paths in the plane. This requires the introduction of a counting criterion which amounts to "cutting off" edges that are, in a specific sense, small. The main argument consists in a mapping between planar Brownian convex hulls and configurations of constrained, independent linear Brownian motions. This new formula is confirmed by retrieving an existing exact result on the average perimeter of the boundary of Brownian convex hulls in the plane.
description: 14 pages, 8 figures, submitted to JPA. (Typo corrected in equation (14).)
U-Nav-Kai-Vi Duepeth Toyave: Volume Two Black Mountain-Thirsty Canyon Traditional Uses of a Volcanic Landscape
Creators: name: Stoffle, Richard W.
name: Arnold, Richard W.
name: Van Vlack, Kathleen
name: O'Meara, Sean M.
name: Medwied-Savage, Jessica L.
Publisher: name: University of Arizona's Bureau of Applied Research in Anthropology
Year: 2008
Subjects: subject: Clark (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3965/clark-county
subject: Black Mountain
valueUri: https://core.tdar.org/browse/geographic-keyword/19165/black-mountain
subject: Volcanic Landscape
valueUri: https://core.tdar.org/browse/geographic-keyword/84830/volcanic-landscape
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: Las Vegas, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/76911/las-vegas-nevada
subject: Nevada (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/919/nevada-state-territory
subject: Nye (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4104/nye-county
subject: Nellis Air Force Base, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/80650/nellis-air-force-base-nevada
subject: Traditional Uses
valueUri: https://core.tdar.org/browse/other-keyword/67390/traditional-uses

description: The research presented in this document builds upon the ethnohistoric, ethnographic, ethnobotanical and ethnozoological information that was discussed in the first Black Mountain study. The lands of the Nevada Test and Training Range (NTTR) were traditionally occupied and used by the Numic people.
Addressing the Emergency Ukraine Food Security Crisis Using Mathematical Modeling Through Optimal Distribution of Food Resources
Creators: name: , Renee
name: Padmanabhan
name: , Byong
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: The ongoing invasion of Ukraine has caused large-scale disruption to global grain markets, which already were unsteadied by the pandemic. Now, close to 900 million people worldwide are food insecure, and many countries rely extensively on Ukrainian grain imports, as a major source of calories. Although Ukraine still produces sufficient grain quantities, many of the country’s railroads have been destroyed and traditional export routes via the Black Sea have been closed. Accordingly, quantifying the resources and costs to export Ukrainian grains via alternate routes is critical. In this project, we use the multi-objective optimization technique for allocating optimal rail-road resources, by optimizing the routes, costs, and times to transport grains across Ukraine. Specifically, we develop a class of mathematical models that increase in complexity and solve them using the software application, AMPL. In future works, we hope to expand our resource allocation and optimization model for food distribution from and to various countries, and potentially apply our model to different resource allocation and distribution problems, such as the distribution of critical medical supplies and vaccines among countries.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
X-ray flares in the long-term light curve of low-luminosity Active Galactic Nucleus M81*
Creators: name: Tomar, Gunjan
name: Gupta, Nayantara
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Most active galactic nuclei at the center of the nearby galaxies have super-massive black holes accreting at sub-Eddington rates through hot accretion flows or radiatively inefficient accretion flows, which efficiently produce jets. The association of radio and X-ray flares with the knot ejection from M81* inspires us to model its multiwavelength spectral energy distribution (SED) during these flares to constrain the physical parameters of the jet. Moreover, we construct a long-term light curve in X-rays to identify the flares in the available data and constrain the jet parameters during those periods. The jet activity may vary on short and long time scales, which may produce flares in different frequency bands. The SEDs from radio to X-ray during the quiescent as well as flaring states are found to be satisfactorily explained by synchrotron emission of relativistic electrons from a single zone. The variation in the values of the jet parameters during the different states is shown and compared with high-synchrotron peaked blazars.
description: 14 pages, 7 figures, 1 table
Eschrichtidae
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Cetacea
Eschrichtidae

description: Family Eschrichtidae REVIEWED BY: C. L. Gray (CLG); J. G. Mead (JGM); D. W. Rice (DWR); R. B. Patten (RBP); O. L. Rossolimo (OLR)(U.S.S.R.). PROTECTED STATUS: CITES - Appendix II as Order Cetacea. ISIS NUMBER: 5301411006000000000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Cetacea, pp. 290-304 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 302, DOI: 10.5281/zenodo.7352983
Groom Area Site Inventory Forms
Creators: name: Haagen, Jordan
Year: 2020
Subjects: subject: Clark (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3965/clark-county
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: Las Vegas, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/76911/las-vegas-nevada
subject: Nevada (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/919/nevada-state-territory
subject: Nye (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4104/nye-county
subject: Nellis Air Force Base, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/80650/nellis-air-force-base-nevada

description: Desert Research Institute Site Forms for the Groom area site on the Nellis Air Force Base, Nevada.
Black Mountain Ethnographic Study U-Nav-Kai-Vi Duepeth Toyave: Volume I
Creators: name: Haagen, Jordan
Publisher: name: University of Arizona's Bureau of Applied Research in Anthropology
Year: 2005
Subjects: subject: Clark (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3965/clark-county
subject: Black Mountain
valueUri: https://core.tdar.org/browse/geographic-keyword/19165/black-mountain
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: Las Vegas, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/76911/las-vegas-nevada
subject: Nevada (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/919/nevada-state-territory
subject: Nye (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4104/nye-county
subject: Nellis Air Force Base, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/80650/nellis-air-force-base-nevada
subject: Traditional Uses
valueUri: https://core.tdar.org/browse/other-keyword/67390/traditional-uses

description: This study describes the interviews, results, and the recommendations of the Native Americans consulted for information that would assist in the protection of sacred and cultural sites.
Numerical analysis of impact processes of granular jets
Creators: name: Sano, Tomohiko G.
name: Hayakawa, Hisao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The rheology of a three-dimensional granular jet during an impact is investigated numerically. The cone-like scattering pattern and the sheet-like pattern observed in an experiment [X. Cheng, et al. Phys. Rev. Lett. 99, 188001 (2007)] can be reproduced through our calculation. We discuss the constitutive equation for granular jet impact in terms of our simulation. From the analysis of an effective friction constant, which is the ratio between the shear stress and the pressure the assumption of the zero yield stress would be natural in our setup and the shear visocity is not small in contrast to the suggestion by the experiment.
description: accepted for publication: Proceedings, Powders & Grains 2013
The Double-$Q$ Ground State with Topological Charge Stripes in the Skyrmion Candidate $\text{GdRu}_{\text{2}}\text{Si}_{\text{2}}$
Creators: name: Wood, G. D. A.
name: Khalyavin, D. D.
name: Mayoh, D. A.
name: Bouaziz, J.
name: Hall, A. E.
name: Holt, S. J. R.
name: Orlandi, F.
name: Manuel, P.
name: Blügel, S.
name: Staunton, J. B.
name: Petrenko, O. A.
name: Lees, M. R.
name: Balakrishnan, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: $\text{GdRu}_{\text{2}}\text{Si}_{\text{2}}$ is a centrosymmetric magnet in which a skyrmion lattice has recently been discovered. Here, we investigate the magnetic structure of the zero field ground state using neutron diffraction on single crystal and polycrystalline $^{\text{160}}\text{GdRu}_{\text{2}}\text{Si}_{\text{2}}$. In addition to observing the principal propagation vectors $\mathbf{q}_{1}$ and $\mathbf{q}_{2}$, we discover higher order magnetic satellites, notably $\mathbf{q}_{1} + 2\mathbf{q}_{2}$. The appearance of these satellites are explained within the framework of a new double-$Q$ constant-moment solution. Using powder diffraction we implement a quantitative refinement of this model. This structure, which contains vortexlike motifs, is shown to have a one-dimensional topological charge density.
description: Accepted PRB Letter (14.4.2023)
Using Physics-Informed Neural Networks to Model and Simulate the Dynamics of Infectious Diseases in Enclosed Environments
Creators: name: Sohini
name: , Long
name: Padmanabhan
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Infectious diseases often have high rates of spread in enclosed spaces. Scientists are creating mathematical models to represent the transmission of the disease to better understand how to prevent individuals from being infected. Although previous studies have modeled the diseases in enclosed spaces with differential equations, the parameters for the equations are often assumed or not often known a priori. Instead, we usually have data about the number of people infected that can be used effectively to estimate the optimal parameters. In this study, we used physics-informed neural networks (PINNs) to retrieve the parameters of the differential equations using available infected data. Specifically, we modeled the dynamics of an infectious disease such as COVID in an enclosed space through a compartmental model consisting of five sub-populations including Susceptible, Exposed, Infected, and Recovered for the human population and the Concentration of the contaminant. We used PINNs as an inverse parameter estimation technique to identify optimal transmission and recovery rates in this model both in the absence and presence of contaminants. We studied the impact of the peak number of infected individuals as a function of increased concentration effects. We also calculated the basic reproduction number for the coupled differential equation model that helps us to provide insights into the spread of the epidemic. Our computations suggest that the model created and the PINNs approach employed can be reliable candidates for understanding the spread of diseases in enclosed spaces.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Non-linear effective field theory simulators in two-fluid interfaces
Creators: name: Barroso, Vitor S.
name: Bunney, Cameron R. D.
name: Weinfurtner, Silke
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Analogue gravity offers an approach for testing the universality and robustness of quantum field theories in curved spacetimes and validating them using down-to-earth, laboratory-based experiments. Fluid interfaces are a promising framework for creating these gravity simulators and have successfully replicated phenomena such as Hawking radiation and black hole superradiance. Recent work has shown that hydrodynamical instabilities on the interface between two fluids can capture features of the post-inflationary thermalisation of the Early Universe. In this study, we extend fluid dynamics methods to develop an effective field theory for the interface between two fluids, demonstrating the equivalence between the governing equations and a relativistic scalar field in an analogue spacetime. We also show that the interfacial height field serves as the analogue relativistic field even in a nonlinear, interacting field theory. We propose that these mathematical equivalences can be extrapolated to probe regimes where calculations are challenging or impractical. Our work provides a new framework for simulating far-from-equilibrium cosmological and gravitational scenarios in the laboratory.
description: 17 pages, contribution to the proceedings of the "Avenues of Quantum Field Theory in Curved Space-time" conference, Genova, September 2022
Comparisons of Matrices with Different Elements but Identical Eigenvalues
Creators: name: Fosso, Daren Sitchepping
name: Fan, Castaly
name: Zamick, Larry
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show 2 matrices that have identical eigenvalues but different eigenfunctions. This shows that in obtaining two body nuclear matrix elements empirically, it is not sufficient to consider only energy levels. Other quantities like transitions must also be included.
description: International Journal of Modern Physics E (2023)
Archaeology and Heritage Awareness Training - The Ft. Drum Pilot Project - Presentation (Legacy 08-324)
Creators: name: Williams, Courtney
Publisher: name: DoD Legacy Resource Management Program
Year: 2008
Subjects: subject: Fort Drum
valueUri: https://core.tdar.org/browse/geographic-keyword/34883/fort-drum
subject: Heritage Preservation
valueUri: https://core.tdar.org/browse/other-keyword/4557/heritage-preservation
subject: Cultural Property Protection
valueUri: https://core.tdar.org/browse/other-keyword/142431/cultural-property-protection
subject: Cultural Awareness Training
valueUri: https://core.tdar.org/browse/other-keyword/165901/cultural-awareness-training
subject: Archaeology
valueUri: https://core.tdar.org/browse/other-keyword/7074/archaeology
subject: International Cultural Property Protection
valueUri: https://core.tdar.org/browse/other-keyword/165864/international-cultural-property-protection
subject: Heritage Awareness
valueUri: https://core.tdar.org/browse/other-keyword/165899/heritage-awareness
subject: Military Services
valueUri: https://core.tdar.org/browse/other-keyword/165900/military-services
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: This presentation stresses awareness of cultural and heritage resources in the field and discusses training with replica and actual heritage sites. The presentation also offers guidelines for addressing heritage sites in the field and associated concerns.
Localisation for a line defect in an infinite square lattice
Creators: name: Colquitt, D. J.
name: Nieves, M. J.
name: Jones, I. S.
name: Movchan, A. B.
name: Movchan, N. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Localised defect modes generated by a finite line defect composed of several masses, embedded an infinite square cell lattice, are analysed using the linear superposition of Green's function for a single mass defect. Several representations of the lattice Green's function are presented and discussed. The problem is reduced to an eigenvalue system and the properties of the corresponding matrix are examined in detail to yield information regarding the number of symmetric and skew-symmetric modes. Asymptotic expansions in the far field, associated with long wavelength homogenisation are presented. Asymptotic expressions for Green's function in the vicinity of the band edge are also discussed. Several examples are presented where eigenfrequencies linked to this system and the corresponding eigenmodes are computed for various defects and compared with the asymptotic expansions. The case of an infinite defect is also considered and an explicit dispersion relation is obtained. For the case when the number of masses within the line defect is large, it is shown that the range of the eigenfrequencies can be predicted using the dispersion diagram for the infinite chain.
Multigap superconducting state in molecular metallic hydrogen
Creators: name: Szczȩśniak, R.
name: Drzazga, E. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The thermodynamic parameters of the superconducting state, that gets induced in the metallic molecular hydrogen under the influence of the pressure at 414 GPa ($T_{C}=84$ K), have been determined. The calculations have been conducted in the framework of the three-band Eliashberg equations. The order parameters ($Δ^α$) and the wave function renormalization factors ($Z^α$) have been derived; the symbol $α$ denotes the band index: $α\in{a,b,c}$. It has been stated that the dimensionless ratios $2Δ^α(0)/k_{B}T_{C}$ are equal to: 5.55, 3.96 and 3.53, respectively. Next, the total normalized function of the density of states, the free energy, the thermodynamic critical field and the specific heat have been determined. The obtained results differ significantly from the results achieved in the framework of the one-band Eliashberg model for the comparable value of the pressure ($p=428$ GPa). In the last step, the values of the wave function renormalization factors have been estimated for $T_{C}$. It allowed us to calculate the maximum value of the electron effective mass in a given band [($[m^{\star}_{e}]_α$). The following results have been achieved: $[m^{\star}_{e}]_{a}=2.99 [m_{e}]_{a}$, $[m^{\star}_{e}]_{b}=2.10 [m_{e}]_{b}$ and $[m^{\star}_{e}]_{c}=1.94 [m_{e}]_{c}$, where $[m_{e}]_α$ stands for the electron band mass.
Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 81 Nr. 2 (2003)
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Titelei
Inhalt
Verbreitung und Kontakte der Kugelamphorenkultur: Ein Blick auf die polykulturellen Peripherien...401-442
Sophie A. de Beaune, Les galets utilisés au Paléolithique supérieur...575-576
Gisela Freund, Sesselfelsgrotte I...577-580
Boris Valentin/Pierre Bodu/Marianne Christensen (Dir.), L’Europe Centrale et Septentrionale au Tardiglaciaire...581-584
Thomas Saile, Untersuchungen zur ur- und frühgeschichtlichen Besiedlung der nördlichen Wetterau...585-589
Cornelius J. Holtorf, Monumental Past...599-603
Albert Hafner/Peter J. Suter, –3400. Die Entwicklung der Bauerngesellschaften im 4. Jahrtausend v. Chr. am Bielersee aufgrund der Rettungsgrabungen von Nidau und Sutz- Lattrigen...604-609
Václav Furmánek/Ladislav Veliačik/Jozef Vladár, Die Bronzezeit im slowakischen Raum...609-612
Gerhard Tomedi, Italische Panzerplatten und Panzerscheiben...621-627
Marian Diepeveen-Jansen, People, Ideas and Goods...627-632
August Oxé/Howard Comfort, Corpus Vasorum Arretinorum...636-639
Dörte Walter, Germanische Keramik zwischen Main und Taunuslimes...640-644
Rosalind Niblett, The Excavation of a Ceremonial Site at Folly Lane, Verulamium...644-648
Holographic thermodynamics of rotating black holes
Creators: name: Gong, Ting-Feng
name: Jiang, Jie
name: Zhang, Ming
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide mass/energy formulas for the extended thermodynamics, mixed thermodynamics, and holographic conformal field theory (CFT) thermodynamics for the charged and rotating Kerr-Newman Anti-de Sitter black holes. Then for the CFT thermal states dual to the black hole, we find the first-order phase transitions and criticality phenomena in the canonical ensemble with fixed angular momentum, volume, and central charge. We observe that the CFT states cannot be analogous to the Van der Waals fluids, despite the critical exponents falling into the universality class predicted by the mean field theory. Additionally, we examine the (de)confinement phase transitions within the grand canonical ensemble with fixed angular velocity, volume, and central charge of the CFT. Our findings suggest that the near zero temperature (de)confinement phase transitions can occur with the angular velocity of the CFT that solely depends on the CFT volume.
description: 21 pages, 5 captioned figures, published version
MPEC 2023-W78 : 2023 VM15
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 VM15

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.
On the multiparametric {\cal U}_q[D_{n+1}^{(2)}] vertex model
Creators: name: Vieira, Ricardo S.
name: Lima-Santos, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we consider families of multiparametric $R$-matrices to make a systematic study of the boundary Yang-Baxter equations in order to discuss the corresponding families of multiparametric $K$-matrices. Our results are indeed non-trivial generalization of the $K$-matrix solutions of the {\cal {U}}_{q}[D_{n+1}^{(2)}] vertex model when distinct reflections and extra free-parameters are admissible.
description: 21 pages. arXiv admin note: text overlap with arXiv:nlin/0509014 by other authors
August Oxé/Howard Comfort, Corpus Vasorum Arretinorum
Creators: name: Rudnick, Bernhard
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: August Oxé/Howard Comfort, Corpus Vasorum Arretinorum. A Catalogue of the
Signatures, Shapes and Chronology of Italian Sigillata. Second edition completely revised
and enlarged by Philip Kenrick. Antiquitas, Reihe 3: Abhandlungen zur Vor- und Frühgeschichte,
zur Klassischen und Provinzial-Römischen Archäologie und zur Geschichte
des Altertums, Band 41. Dr. Rudolf Habelt GmbH, Bonn 2000. 100,21 E. ISBN 3-7749-
3029-5. XIV, 554 Seiten mit 22 Abbildungen und 1 CD-ROM.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 81 Nr. 2 (2003)
A Mathematical Model for Understanding and Predicting Dynamics of Depression as an Epidemic
Creators: name: , Bianca
name: , Alonso
name: Padmanabhan
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Depression is a serious and common medical mental illness. It impacts how people feel, think, and act on a daily basis. Awareness of how interacting with those that are depressed can help those who have depression generate a better understanding of the cause of the illness, which will help them find appropriate treatment. Therefore, this study introduces a novel mathematical model to understand and predict the dynamics of depression as an epidemic. This integrated compartmental model combines a modified SEIR (Susceptible, Exposed, Infected, Removed) epidemiological model and neural networks to determine optimal transmission and recovery parameters. The system of ordinary differential equations demonstrates the flow between vulnerable, depressed, treated, and recovered groups impacted by a social factor. We employ a novel Disease Informed Neural Network approach to identify and understand the impact of the social factor. This model was trained using synthetic data, and the accuracy of the model parameters ranged from 83% and 99%. In order to achieve better accuracy, the hyperparameters, iterations, and neurons, were altered. However, results proved that the alteration did not impact the model parameters. This integrated model is a quick and extensible tool for understanding depression over time. We hope to include more social factors to improve the robustness and reliability of the model and apply it to real data sets.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Nye General Area
Creators: name: Haagen, Jordan
Year: 2020
Subjects: subject: Clark (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3965/clark-county
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: Las Vegas, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/76911/las-vegas-nevada
subject: Nevada (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/919/nevada-state-territory
subject: Nye (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4104/nye-county
subject: Nellis Air Force Base, Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/80650/nellis-air-force-base-nevada

description: IMACS Site Forms in Nye County for Nellis Air Force Base, Nevada.
Interlayer superexchange in bilayer chromium trihalides
Creators: name: Song, Kok Wee
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We construct a microscopic model based on superexchange theory for a moiré bilayer in chromium trihalides (Cr$X_3$, $X=$Br, I). In particular, we derive analytically the interlayer Heisenberg exchange and the interlayer Dzyaloshinskii-Moriya interaction with arbitrary distances (x) between spins. Importantly, our model takes into account sliding and twisting geometries in the interlayer $X$-$X$ hopping processes. Our approach can directly access the $x$-dependent interlayer exchange without large unit-cell calculations. We argue that deducing interlayer exchange by various sliding bilayers may lead to an incomplete result in a moiré bilayer. Using the \textit{ab initio} tight-binding Hamiltonian, we numerically evaluate the exchange interactions in CrI$_3$. We find that our analytical model agrees with previous comprehensive density functional theory studies. Furthermore, our findings reveal the important role of the correlation effects in the $X$'s $p$ orbitals, which gives rise to a rich interlayer magnetic interaction with remarkable tunability.
description: 8+8 pages, 5 figures, including supplemental materials and minor corrections
Cultural Resources Best Management Practices - Calendar (Legacy 07-365)
Creators: name: Wagner, Heather
Publisher: name: DoD Legacy Resource Management Program
Year: 2008
Subjects: subject: Department of Defense
valueUri: https://core.tdar.org/browse/other-keyword/123614/department-of-defense
subject: Cultural Resource Management
valueUri: https://core.tdar.org/browse/other-keyword/11316/cultural-resource-management
subject: Cultural Resource Program
valueUri: https://core.tdar.org/browse/other-keyword/31220/cultural-resource-program
subject: Cultural Resources
valueUri: https://core.tdar.org/browse/other-keyword/101507/cultural-resources
subject: Cultural Resources Managers
valueUri: https://core.tdar.org/browse/other-keyword/165911/cultural-resources-managers
subject: U.S. Military History
valueUri: https://core.tdar.org/browse/other-keyword/165702/us-military-history
subject: Outreach
valueUri: https://core.tdar.org/browse/other-keyword/142777/outreach
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: This Heritage Outreach Planning Calendar template was designed for use by DoD installation cultural resources managers.
Camassa-Holm type equations for axisymmetric Poiseuille pipe flows
Creators: name: Fedele, Francesco
name: Dutykh, Denys
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Numerical Analysis (math.NA)
subject: Chaotic Dynamics (nlin.CD)
subject: Classical Physics (physics.class-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present a study on the nonlinear dynamics of a disturbance to the laminar state in non-rotating axisymmetric Poiseuille pipe flows. The associated Navier-Stokes equations are reduced to a set of coupled generalized Camassa-Holm type equations. These support singular inviscid travelling waves with wedge-type singularities, the so called peakons, which bifurcate from smooth solitary waves as their celerity increase. In physical space they correspond to localized toroidal vortices or vortexons. The inviscid vortexon is similar to the nonlinear neutral structures found by Walton (2011) and it may be a precursor to puffs and slugs observed at transition, since most likely it is unstable to non-axisymmetric disturbances.
description: 11 pages, 4 figures, 31 references. Other author's papers can be downloaded at http://www.denys-dutykh.com/
High-order BDF convolution quadrature for subdiffusion models with a singular source term
Creators: name: Shi, Jiankang
name: Chen, Minghua
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Anomalous diffusion is often modelled in terms of the subdiffusion equation, which can involve a weakly singular source term. For this case, many predominant time stepping methods, including the correction of high-order BDF schemes [{\sc Jin, Li, and Zhou}, SIAM J. Sci. Comput., 39 (2017), A3129--A3152], may suffer from a severe order reduction. To fill in this gap, we propose a smoothing method for time stepping schemes, where the singular term is regularized by using a $m$-fold integral-differential calculus and the equation is discretized by the $k$-step BDF convolution quadrature, called ID$m$-BDF$k$ method. We prove that the desired $k$th-order convergence can be recovered even if the source term is a weakly singular and the initial data is not compatible. Numerical experiments illustrate the theoretical results.