cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Microbiological and geotechnical characterization of oil sands tailings in relation to acid rock drainage
Creators: name: Dean, Courtney
Publisher: name: University of British Columbia
Year: 2015

description: Traditional disposal of oil sands fine tailings has been a challenge to the industry, and developing new disposal technologies, such as surface deposition, poses alternative challenges. Unsaturated surface deposits of paraffinic froth treatment (TSRU) tailings have the potential to generate acid rock drainage (ARD). To develop environmentally-sound prevention measures to mitigate this risk, such as phage therapy, knowledge of the microbial and geotechnical characteristics of TSRU tailings is essential. To investigate the native microbial population potentially related to ARD generation in surface deposits of these tailings, enrichment cultures were used to isolate sulfur-oxidizing microbes at three stages of ARD development : pH 7, 4.5 and 2.5. Microbial growth studies were performed to establish the conditions for phage growth. The geotechnical properties and unsaturated behaviors were established of four variations of the tailings : untreated, polymer-amended, and two sand-mixed tailings. The findings indicate that TSRU tailings host native microbial communities potentially capable of playing a role in ARD development, and that the unsaturated tailings behavior would likely expedite this process upon surface deposition and subsequent desaturation. These results highlight the need for the development of ARD prevention technologies in the event of surface deposition of TSRU tailings. This research adds to the limited knowledge of microbial communities in oil sands tailings, and to the geotechnical performance of TSRU tailings.
Profile of tirzepatide in the management of type 2 diabetes mellitus: design, development, and place in therapy
Creators: name: Naseralallah, Lina
name: Aboujabal, Bodoor
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Type 2 diabetes mellitus (T2DM) is one of the leading causes of morbidity and mortality. Peptide-based multi-targeting agonists represent a new paradigm in metabolic pharmacology as they manifest multiplexed pharmacological actions over mono-agonists. Tirzepatide is a novel dual glucose-dependent insulinotropic polypeptide receptor (GIPR) and glucagon-like peptide-1 receptor (GLP-1R) agonist that has been recently approved by the FDA. This review aims to summarize the available evidence on the discovery, pharmacology, pharmacokinetic, pharmacodynamic, efficacy, and safety of tirzepatide in the pharmacotherapy of T2DM. We searched PubMed, Embase, and International Pharmaceutical Abstracts to identify relevant papers on tirzepatide use in T2DM. Clinical trial registries were also searched. Tirzepatide improves glycemic control compared to baseline, placebo, and active comparators. It is also associated with weight reduction and an improvement in some, but not all, dyslipidemia, cardiovascular risk, and non-alcoholic steatohepatitis (NASH) biomarkers. Tirzepatide has a favorable safety profile with a low risk of hypoglycemia; however, adverse events such as gastrointestinal reactions were frequently reported and sometimes even led to therapy discontinuation. Future research should focus on investigating the role of tirzepatide in obesity, NASH, and cardio-renal benefits. Real-world observational studies are also needed to assess rare and long-term adverse events.
AcuA: the AKARI/IRC Mid-infrared Asteroid Survey
Creators: name: Usui, Fumihiko
name: Kuroda, Daisuke
name: Mueller, Thomas G.
name: Hasegawa, Sunao
name: Ishiguro, Masateru
name: Ootsubo, Takafumi
name: Ishihara, Daisuke
name: Kataza, Hirokazu
name: Takita, Satoshi
name: Oyabu, Shinki
name: Ueno, Munetaka
name: Matsuhara, Hideo
name: Onaka, Takashi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the results of an unbiased asteroid survey in the mid-infrared wavelength with the Infrared Camera (IRC) onboard the Japanese infrared satellite AKARI. About 20% of the point source events recorded in the AKARI All-Sky Survey observations are not used for the IRC Point Source Catalog (IRC-PSC) in its production process because of the lack of multiple detection by position. Asteroids, which are moving objects on the celestial sphere, remain in these "residual events". We identify asteroids out of the residual events by matching them with the positions of known asteroids. For the identified asteroids, we calculate the size and albedo based on the Standard Thermal Model. Finally we have a brand-new catalog of asteroids, named the Asteroid Catalog Using Akari (AcuA), which contains 5,120 objects, about twice as many as the IRAS asteroid catalog. The catalog objects comprise 4,953 main belt asteroids, 58 near Earth asteroids, and 109 Jovian Trojan asteroids. The catalog will be publicly available via the Internet.
description: 22 pages, 13 figures, and 11 tables, accepted for publication in PASJ
A symmetrized conjugacy scheme for orthogonal expansions
Creators: name: Nowak, Adam
name: Stempak, Krzysztof
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A50, 42A38

description: We establish a symmetrization procedure in a context of general orthogonal expansions associated with a second order differential operator $L$, a `Laplacian'. Combined with a unified conjugacy scheme furnished in our earlier article it allows, via a suitable embedding, to associate a differential-difference `Laplacian' $\mathbb{L}$ with the initially given orthogonal system of eigenfunctions of $L$, so that the resulting extended conjugacy scheme has the natural classical shape. This means, in particular, that the related `partial derivatives' decomposing $\mathbb{L}$ are skew-symmetric in an appropriate $L^2$ space and they commute with Riesz transforms and conjugate Poisson integrals. The results shed also some new light on the question of defining higher order Riesz transforms for general orthogonal expansions.
description: 15 pages
A FEM study on the mechanical behavior of corrugated-core steel sandwich welded panels in bridge deck applications
Creators: name: Tehrani, Mehdi
Publisher: name: University of British Columbia
Year: 2015

description: A critical challenge in bridge design and construction process is to reduce the weight of bridge deck. Designers and manufactures tend to put a lot of effort to come up with different solutions for innovative bridge decks. Specifically, in small aged bridges, light modules provide an easy and fast bridge deck renewal. Sandwich panels were introduced as such light weight bridge decks a few decades ago. Steel sandwich panel is composed of three layers of plates; two face sheets and a corrugated core. Low density and high specific strength of the panels provide remarkable advantages for a wide variety of industrial applications. The main objective of this study is to investigate the effect of geometric parameters on the mechanical behavior of the corrugated-core steel sandwich panel. In order to mathematically simulate the panel two mechanical responses of maximum panel deflection and maximum shear force at core and face sheets interface are investigated. A regression model is introduced for each response which obtained from the contributions of the geometric parameters and their interactions. The effect plots revealed that core and face sheet thicknesses highly affect the panel deflection response and weld spacing highly affects the maximum shear force response. Predicted response values obtained from regression model are reasonably close to FEM results. The research also focuses on potential failure scenarios which may occur at the core and face sheets bonding connected via spot weld in the case of over loading. The failure analysis showed that the spot weld detachment in all welding paths starts from the panel edges near the girder supports and propagates toward the center of panel. In addition, as the applied load increases up to 300% of service load, the number of failed welds increases exponentially.
Antioxidant assay 1: Ascorbate peroxidase (APX)
Creators: name: Ntatsi, Georgia
name: Savvas, Dimitrios
Publisher: name: Zenodo
Year: 2018

description: Ascorbate (AsA) is a major antioxidant and free-radical scavenger in plants and is considered to be of paramount importance as an electron donor for H2O2 detoxifications via ascorbate peroxidase (APX) in plant cells (Ahmad et al., 2010)
description: The information presented here has been thoroughly researched and is believed to be accurate and correct. However, the authors cannot be held legally responsible for any errors. There are no warranties, expressed or implied, made with respect to the information provided. The authors will not be liable for any direct, indirect, special, incidental or consequential damages arising out of the use or inabiLy to use the content of this publication.
TRU energy monitoring for potential cost saving in electricity bills for cathodic protection units: South African Case
Creators: name: Sibiya, Cyncol A.
name: Kusakana, Kanzumba
name: Numbi, Bubele P.
Publisher: name: Mangosuthu University of Technology (MUT)
Year: 2022
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Reducing the electricity bill in the industrial sector is an important problem worldwide. This study focuses on the awareness of industries to Cathodic Protec?tion (CP) energy conservation and on the potential of reducing electricity bills by a change of tariff or making use of renewable energy. Due to the frequent increase in energy cost at a significant rate, many indusial consumers are looking for ways to reduce the monthly electricity bill. The study aims to identify if it will be possible to use options such as renewable energy to supply CP systems, or if a change of tariff can help reduce the monthly bills. To achieve this, a real-time energy-monitoring device “Efergy E2” was installed in one of the Transformer Rectifier Units (TRU), the monitored TRU is located at Ndwedwe reservoir 2 in the areas of Durban. Among other benefits, the hourly load data analysis can provide the detailed characteristics of load demand, define the consumption patterns and can help to identify where the consumer could reduce the electricity bill. The results indicate that the load is almost constant throughout the day and changing to Time of Use (TOU) tariff does reduce the bills. However, the fixed charges amount to 11 times energy charges, hence the best way is to make use of renewable energy rather than changing a tariff.
Induced superconductivity in noncuprate layers of the Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ high-temperature superconductor: Modeling of scanning tunneling spectra
Creators: name: Suominen, Ilpo
name: Nieminen, Jouko
name: Markiewicz, R. S.
name: Bansil, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We analyze how the coherence peaks observed in Scanning Tunneling Spectroscopy (STS) of cuprate high temperature superconductors are transferred from the cuprate layer to the oxide layers adjacent to the STS microscope tip. For this purpose, we have carried out a realistic multiband calculation for the superconducting state of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ (Bi2212) assuming a short range d-wave pairing interaction confined to the nearest-neighbor Cu $d_{x^2-y^2}$ orbitals. The resulting anomalous matrix elements of the Green's function allow us to monitor how pairing is then induced not only within the cuprate bilayer but also within and across other layers and sites. The symmetry properties of the various anomalous matrix elements and the related selection rules are delineated.
description: 9 pages, 2 figures. Accepted for publication in Phys. Rev. B
Diffusive redistribution of small spheres in crystallization of highly asymmetric binary hard-sphere mixtures
Creators: name: Xu, Wen-Sheng
name: Sun, Zhao-Yan
name: An, Li-Jia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report a molecular dynamics study of crystallization in highly asymmetric binary hard-sphere mixtures, in which the large spheres can form a crystal phase while the small ones remain disordered during the crystallization process of the large spheres. By taking advantage of assisting crystal nucleation with a patterned substrate, direct evidence is presented that there is a close link between the diffusive redistribution of the small spheres and the crystal formation of the large spheres. Although the addition of a second component with large size disparity will not alter the crystal structure formed by the large spheres, the density profile of the small spheres displays corresponding changes at different crystallization stages and closely relates to the crystal growth, suggesting possible effect of small spheres on the crystallization kinetics.
description: 5 pages, 5 figures
title: Analysis of publicly available datasets to produce novel findings with clinical relevance
Creators: name: McLaughlin, Katie-May
Publisher: name: University of Kent
Year: 2021

description: Advances in high-throughput sequencing technologies have facilitated the generation of large-scale genomic and pharmacogenomic databases. Such databases represent an important source of multi-platform data and a critical resource for biomedical research. Moreover, the computational tools available to analyse such ‘big data’ have evolved substantially in recent years. Here, we have utilised various open-access data resources for our cancer and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)/coronavirus disease 2019 (COVID-19)-related research. Specifically, in our cancer studies, we have correlated expression of genes differentially expressed in response to the phosphorylation status of phosphoprotein enriched in astrocytes 15 (PEA-15) in cisplatin-treated SKOV-3 ovarian cancer cell lines with survival of cisplatin-treated patients. We have also investigated the role of deoxynucleoside triphosphate triphosphohydrolase SAMHD1 in influencing drug sensitivity and cancer patient survival using data from both cell line and clinical studies. In our SARS-CoV-2/COVID-19 studies, we have used structural data to predict the impact of differentially conserved amino acid positions (DCPs) between SARS-CoV and SARS-CoV-2 on the function of SARS-CoV-2 proteins. We have also used transcriptomic and proteomic datasets of SARS-CoV-2-infected cells and patients to identify links between pathways of COVID-19 clinicopathogenesis and deregulation of genes involved in those pathways. Our computational approach demonstrates how publicly accessible data can not only be used to complement in vitro investigations, but also to generate novel findings with clinical significance.
Invertible Symmetric 3 x 3 Binary Matrices and GQ(2,4)
Creators: name: Blunck, Andrea
name: Levay, Peter
name: Saniga, Metod
name: Vrana, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We reveal an intriguing connection between the set of 27 (disregarding the identity) invertible symmetric 3 x 3 matrices over GF(2) and the points of the generalized quadrangle GQ(2,4). The 15 matrices with eigenvalue one correspond to a copy of the subquadrangle GQ(2,2), whereas the 12 matrices without eigenvalues have their geometric counterpart in the associated double-six. The fine details of this correspondence, including the precise algebraic meaning/analogue of collinearity, are furnished by employing the representation of GQ(2,4) as a quadric in PG(5,2) of projective index one. An interesting physical application of our findings is also mentioned.
description: 10 pages, 1 figure
Nucleon properties in nuclear matter
Creators: name: Yakhshiev, Ulugbek
name: Kim, Hyun-Chul
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present recent studies on the effective mass of the nucleon in infinite and homogeneous nuclear matter and its relation to nuclear matter properties within the framework of the in-medium modified Skyrme model. Medium modifications are achieved by introducing optical potential for pion fields and parametrization of the Skyrme parameter in nuclear medium. The present approach is phenomenologically well justified by pion physics in nuclear matter and describe successfully bulk nuclear matter properties.
description: 3 pages, 2 figure. A talk given at International Conference on the structure of baryons, BARYONS 2010, Dec. 7-11, 2010, Osaka, Japan
One invariant measure and different Poisson brackets for two nonholonomic systems
Creators: name: Tsiganov, A. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We discuss the nonholonomic Chaplygin and the Borisov-Mamaev-Fedorov systems, for which symplectic forms are different deformations of the square root from the corresponding invariant volume form. In both cases second Poisson bivectors are determined by $L$-tensors with non-zero torsion on the configurational space, in contrast with the well known Eisenhart-Benenti and Turiel constructions.
description: 18 pages, LaTeX with AMSfonts
Potential of Pineapple Leaf Fibers as Sound and Thermal Insulation Materials in Thailand
Creators: name: Rungsima Chollakup
Publisher: name: Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi
Year: 2023
Subjects: Environmentally friendly products
Pineapple leaf fiber
Sound absorption
Thermal insulation
Business feasibility

description: Progress in Applied Science and Technology, 13, 1, 26-32
Two new dihydro-β-agarofuran sesquiterpenes from the roots of Celastrus angulatus
Creators: name: Tang, Juan
name: Hu, Jia-Zhen
name: Chen, Yan-Ling
name: Zhao, Ting-Ting
name: Chen, Tao-Xiang
name: Hu, Cheng-Gang
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Hematology

description: Two new dihydro-β-agarofuran sesquiterpenes chiapen T (1) and chiapen U (2), along with chiapen A (3), 1β-hydroxy-2β,6α,12-triacetoxy-8β-(β-nicotinoyloxy)-9β-(benzoyloxy)-β-dihydroagarofuran (4), wilforlide B (5), 3-hydroxy-2-oxo-3-friedelen-29-oic acid (6), epikatonic acid (7), 22-epi-maytenfolic acid (8), maytenoic acid (9), wilforic acid F (10), wilforic acid B (11), were reported for the first time from the Celastrus angulatus. The structures of all the compounds were elucidated by HR-ESI-MS, 1 D and 2 D NMR spectra, as well as single-crystal X-ray diffraction analyses. Compounds 1 and 2 were examined for anti-inflammatory activity, respectively. None of them showed potent activity.
Infrared chiral anomaly at finite temperature
Creators: name: Das, Ashok
name: Frenkel, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the Schwinger model at finite temperature and show that a temperature dependent chiral anomaly may arise from the long distance behavior of the electric field. At high temperature this anomaly depends linearly on the temperature $T$ and is present not only in the two point function, but also in all even point amplitudes.
description: revtex, 5pages
Effective temperature and glassy dynamics of active matter
Creators: name: Wang, Shenshen
name: Wolynes, Peter G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: A systematic expansion of the many-body master equation for active matter, in which motors power configurational changes as in the cytoskeleton, is shown to yield a description of the steady state and responses in terms of an effective temperature. The effective temperature depends on the susceptibility of the motors and a Peclet number which measures their strength relative to thermal Brownian diffusion. The analytic prediction is shown to agree with previous numerical simulations and experiments. The mapping also establishes a description of aging in active matter that is also kinetically jammed.
description: 2 figures
Angiopoietin-like protein 8, molecular cloning and regulating lipid accumulation in goat intramuscular preadipocytes
Creators: name: Huang, Wei
name: Lin, Yaqiu
name: Xiang, Hua
name: Zhu, Jiangjiang
name: Wang, Yong
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: This study aimed to clone the full-length open reading frame (ORF) of goat ANGPTL8 gene sequence, reveal its molecular and expression characteristics, and explore its effect on the differentiation of goat intramuscular preadipocytes. The full-length ORF sequence of goat ANGPTL8 gene was cloned by RT-PCR technology, and bioinformatics analysis was performed by related biological software. RT-qPCR was used to detect the expression of ANGPTL8 mRNA in goat tissues. Further use of RNA interference to study the effect of ANGPTL8 on the differentiation of goat intramuscular preadipocytes. The total length of the ANGPTL8 gene nucleotide sequence is 717 bp, including 597 bp of ORF, encoding 198 amino acids. Goat ANGPTL8 has the closest relationship with sheep, it was widely expressed in different tissues, and relatively enriched in liver. The silence of ANGPTL8 inhibited the accumulation of lipid droplets by 5.76% in goat intramuscular preadipocytes (p > 0.05) and significantly suppressed the expression of the genes related to preadipocytes differentiation, fatty acid synthesis and transport (p＜0.05 or p＜0.01). These data illuminate the speculation that ANGPTL8 may involve in the lipid accumulation regulation via the control of PPARγ and C/EBPβ in goat adipocytes.
A new statistical approach to strain-based structural health monitoring of composites under uncertainty
Creators: name: Teimouri, Hessamodin
Publisher: name: University of British Columbia
Year: 2015

description: Structural Health Monitoring (SHM) technology has been widely applied in different industrial areas. The technology promises to reduce the cost of required safety measures and extend the interval between manual inspections by providing a continuous automated monitoring. A major concern in developing ‘robust’ SHM systems, however, is the impact of uncertainty of input parameters in the accuracy and reliability of the monitoring. The purpose of this thesis is implementing advanced statistical pattern recognition techniques capable of considering variations in input parameters, and eventually arriving at a new structural monitoring system immune to uncertainty of parameters. For this purpose, first to show the need for such robust SHM systems in real-world case studies, two different composite structures, namely a T-joint and an airfoil are investigated to statistically evaluate the importance of potential manufacturing/loading errors compared to the presence of delamination. Results of this preliminary stage of the study proved the importance of uncertainty analysis in the development of a reliable and precise SHM system. Next, a complete neural network based SHM system was developed for the airfoil case study to investigate single damage scenarios in the form of artificial delaminations of variety of sizes at different locations. The reliability and robustness of the network was assessed in the presence of noisy input caused by inaccurate production process. It was seen that the poor predictability of the network can only be corrected by adding an oversized database of all the noisy scenarios in the training stage, which is practically unacceptable both time- and budget-wise. Next, a new concept of Signal-to-Noise (SN) ratio analysis in SHM was implemented to weigh the first layer of the neural network in the case of uncertain inputs. This approach worked remarkably well, but still a practical concern persisted and that is the precise estimation of the weighting factors. At last, Gaussian Processes (GP) was proposed to train the SHM system in the presence of large uncertainty effects. The new GP SHM in the given case study proved to be distinctively capable of analyzing the input data and predicting both the location and size of the single damage in the composite structure.
Rényi entropy of a line in two-dimensional Ising models
Creators: name: Stéphan, Jean-Marie
name: Misguich, Grégoire
name: Pasquier, Vincent
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the two-dimensional (2d) Ising model on a infinitely long cylinder and study the probabilities $p_i$ to observe a given spin configuration $i$ along a circular section of the cylinder. These probabilities also occur as eigenvalues of reduced density matrices in some Rokhsar-Kivelson wave-functions. We analyze the subleading constant to the Rényi entropy $R_n=1/(1-n) \ln (\sum_i p_i^n)$ and discuss its scaling properties at the critical point. Studying three different microscopic realizations, we provide numerical evidence that it is universal and behaves in a step-like fashion as a function of $n$, with a discontinuity at the Shannon point $n=1$. As a consequence, a field theoretical argument based on the replica trick would fail to give the correct value at this point. We nevertheless compute it numerically with high precision. Two other values of the Rényi parameter are of special interest: $n=1/2$ and $n=\infty$ are related in a simple way to the Affleck-Ludwig boundary entropies associated to free and fixed boundary conditions respectively.
description: 8 pages, 6 figures, 2 tables. To be submitted to Physical Review B
Mapping gravitational lensing of the CMB using local likelihoods
Creators: name: Anderes, Ethan
name: Knox, Lloyd
name: van Engelen, Alexander
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a new estimation method for mapping the gravitational lensing potential from observed CMB intensity and polarization fields. Our method uses Bayesian techniques to estimate the average curvature of the potential over small local regions. These local curvatures are then used to construct an estimate of a low pass filter of the gravitational potential. By utilizing Bayesian/likelihood methods one can easily overcome problems with missing and/or non-uniform pixels and problems with partial sky observations (E and B mode mixing, for example). Moreover, our methods are local in nature which allow us to easily model spatially varying beams and are highly parallelizable. We note that our estimates do not rely on the typical Taylor approximation which is used to construct estimates of the gravitational potential by Fourier coupling. We present our methodology with a flat sky simulation under nearly ideal experimental conditions with a noise level of 1 $μK$-arcmin for the temperature field, $\sqrt{2}$ $μK$-arcmin for the polarization fields, with an instrumental beam full width at half maximum (FWHM) of 0.25 arcmin.
A comparison of the fluences and photon peak fluxes for the Swift and RHESSI gamma-ray bursts
Creators: name: Huja, D.
name: Ripa, J.
name: Meszaros, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Fluences and photon peak fluxes of the gamma-ray bursts (GRBs) detected by the Swift and RHESSI satellites are graphically compared.
description: 2 pages, 1 figure
Additional file 3 of Antennal transcriptome analysis of olfactory genes and characterizations of odorant binding proteins in two woodwasps, Sirex noctilio and Sirex nitobei (Hymenoptera: Siricidae)
Creators: name: Guo, Bing
name: Hao, Enhua
name: Qiao, Haili
name: Wang, Jingzhen
name: Wu, Weiwei
name: Zhou, Jingjiang
name: Lu, Pengfei
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3. The sequence of OBPs with alignment were shown six conserved cysteine residues.
Statistical Study on the Nature of Solar Flux Emergence
Creators: name: Otsuji, Kenichi
name: Kitai, Reizaburo
name: Ichimoto, Kiyoshi
name: Shibata, Kazunari
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We studied 101 flux emergence events ranging from small ephemeral regions to large emerging flux regions which were observed with Hinode Solar Optical Telescope filtergram. We investigated how the total magnetic flux of the emergence event controls the nature of emergence. To determine the modes of emergences, horizontal velocity fields of global motion of the magnetic patches in the flux emerging sites were measured by the local correlation tracking. Between two main polarities of the large emerging flux regions with more than around 2 \times 10^19 Mx, there were the converging flows of anti-polarity magnetic patches. On the other hand, small ephemeral regions showed no converging flow but simple diverging pattern. When we looked into the detailed features in the emerging sites, irrespective of the total flux and the spatial size, all the emergence events were observed to consist of single or multiple elementary emergence unit(s). The typical size of unitary emergence is 4 Mm and consistent with the simulation results. From the statistical study of the flux emergence events, the maximum spatial distance between two main polarities, the magnetic flux growth rate and the mean separation speed were found to follow the power-law functions of the total magnetic flux with the indices of 0.27, 0.57, and -0.16, respectively. From the discussion on the observed power-law relations, we got a physical view of solar flux emergence that emerging magnetic fields float and evolve balancing to the surrounding turbulent atmosphere. Key words: Sun: magnetic fields - Sun: emerging flux - Sun: photosphere - Sun: chromosphere
Awaking the vacuum in relativistic stars
Creators: name: Lima, William C. C.
name: Matsas, George E. A.
name: Vanzella, Daniel A. T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Void of any inherent structure in classical physics, the vacuum has revealed to be incredibly crowded with all sorts of processes in relativistic quantum physics. Yet, its direct effects are usually so subtle that its structure remains almost as evasive as in classical physics. Here, in contrast, we report on the discovery of a novel effect according to which the vacuum is compelled to play an unexpected central role in an astrophysical context. We show that the formation of relativistic stars may lead the vacuum energy density of a quantum field to an exponential growth. The vacuum-driven evolution which would then follow may lead to unexpected implications for astrophysics, while the observation of stable neutron-star configurations may teach us much on the field content of our Universe.
description: To appear in Phys. Rev. Lett
Angiopoietin-like protein 8, molecular cloning and regulating lipid accumulation in goat intramuscular preadipocytes
Creators: name: Huang, Wei
name: Lin, Yaqiu
name: Xiang, Hua
name: Zhu, Jiangjiang
name: Wang, Yong
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: This study aimed to clone the full-length open reading frame (ORF) of goat ANGPTL8 gene sequence, reveal its molecular and expression characteristics, and explore its effect on the differentiation of goat intramuscular preadipocytes. The full-length ORF sequence of goat ANGPTL8 gene was cloned by RT-PCR technology, and bioinformatics analysis was performed by related biological software. RT-qPCR was used to detect the expression of ANGPTL8 mRNA in goat tissues. Further use of RNA interference to study the effect of ANGPTL8 on the differentiation of goat intramuscular preadipocytes. The total length of the ANGPTL8 gene nucleotide sequence is 717 bp, including 597 bp of ORF, encoding 198 amino acids. Goat ANGPTL8 has the closest relationship with sheep, it was widely expressed in different tissues, and relatively enriched in liver. The silence of ANGPTL8 inhibited the accumulation of lipid droplets by 5.76% in goat intramuscular preadipocytes (p > 0.05) and significantly suppressed the expression of the genes related to preadipocytes differentiation, fatty acid synthesis and transport (p＜0.05 or p＜0.01). These data illuminate the speculation that ANGPTL8 may involve in the lipid accumulation regulation via the control of PPARγ and C/EBPβ in goat adipocytes.
RISIS Research Seminar: Refugees access to higher ducation in Europe – Policy goals, data needs and some empirical results
Creators: name: Lambrechts, Agata
name: Kaiser, Frans
Publisher: name: Zenodo
Year: 2021
Subjects: RISIS2
Eter Dataset
RISIS Dataset
European Universities
Refugees
Indicators

description: In view of the ongoing so-called ‘refugee crisis’, which began in late 2014, there is a growing potential demand for higher education (HE) opportunities amongst refugee communities in Europe and elsewhere. The EU acknowledges this need and supports the integration of people with refugee backgrounds into HE, including through funding of online linguistic support for new arrivals. Thus far, however, we know relatively little about the participation levels of students with refugee backgrounds in European universities. As noted in the recent Eurydice report, most countries of the Erasmus+ programme do not have specific policy approaches on this matter despite several systems referring to refugees and/or asylum seekers in national legislation. Furthermore, the report suggested that few countries still undertake systematic monitoring, confirming the low priority of this issue in the national HE systems. In the absence of top-down requirements to strategically plan for widening participation of those with refugee backgrounds and monitoring of the outcomes, it is suggested that data can be collected only at the university level. It is not without difficulties, and institutions need to consider both ethical and methodological issues. However, refugees and their educational needs will likely remain invisible if we do not get a clear picture of their (under)representation in European universities. The goal of the presentation will be, first, to discuss some potential indicators on refugees’ integration in higher education and to develop directions for a framework for data collection that could be connected with European-level higher education monitoring systems such as Eurydice, ETER and Multirank. Frans Kaiser, CHEPS, University of Twente, is involved as discussant.
Intercalation of Few-Layer Graphite Flakes with FeCl3: Raman Determination of Fermi Level, Layer Decoupling and Stability
Creators: name: Zhao, W. J.
name: Tan, P. H.
name: Liu, J.
name: Ferrari, A. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use anhydrous ferric chloride (FeCl3) to intercalate graphite flakes consisting of 2 to 4 graphene layers and to dope graphene monolayers. The intercalant, staging, stability and doping of the resulting intercalation compounds (ICs) are characterized by Raman scattering. The G peak of monolayer graphene heavily-doped by FeCl3 upshifts to~1627cm-1. 2-4 layer ICs have similar upshifts, and a Lorentzian lineshape for the 2D band, indicating that each layer behaves as a decoupled heavily doped monolayer. By performing Raman measurement at different excitation energies we show that, for a given doping level, the 2D peak can be suppressed by Pauli blocking for laser energy below the doping level. Thus, multi-wavelength Raman spectroscopy allows a direct evaluation of the Fermi level, complementary to that derived by Raman measurements at excitation energies higher than the doping level. We estimate a Fermi level shift of~0.9eV. These ICs are ideal test-beds for the physical and chemical properties of heavily-doped graphenes.
Modelling Time-varying Dark Energy with Constraints from Latest Observations
Creators: name: Zhang, Qing-Jun
name: Wu, Yue-Liang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce a set of two-parameter models for the dark energy equation of state (EOS) $w(z)$ to investigate time-varying dark energy. The models are classified into two types according to their boundary behaviors at the redshift $z=(0,\infty)$ and their local extremum properties. A joint analysis based on four observations (SNe + BAO + CMB + $H_0$) is carried out to constrain all the models. It is shown that all models get almost the same $χ^2_{min}\simeq 469$ and the cosmological parameters $(Ω_M, h, Ω_bh^2)$ with the best-fit results $(0.28, 0.70, 2.24)$, although the constraint results on two parameters $(w_0, w_1)$ and the allowed regions for the EOS $w(z)$ are sensitive to different models and a given extra model parameter. For three of Type I models which have similar functional behaviors with the so-called CPL model, the constrained two parameters $w_0$ and $w_1$ have negative correlation and are compatible with the ones in CPL model, and the allowed regions of $w(z)$ get a narrow node at $z\sim 0.2$. The best-fit results from the most stringent constraints in Model Ia give $(w_0,w_1) = (-0.96^{+0.26}_{-0.21}, -0.12^{+0.61}_{-0.89})$ which may compare with the best-fit results $(w_0,w_1) = (-0.97^{+0.22}_{-0.18}, -0.15^{+0.85}_{-1.33})$ in the CPL model. For four of Type II models which have logarithmic function forms and an extremum point, the allowed regions of $w(z)$ are found to be sensitive to different models and a given extra parameter. It is interesting to obtain two models in which two parameters $w_0$ and $w_1$ are strongly correlative and appropriately reduced to one parameter by a linear relation $w_1 \propto (1+w_0)$.
description: 30 pages, 7 figures
Emergence and Stability of Vortex Clusters in Bose-Einstein Condensates: a Bifurcation Approach near the Linear Limit
Creators: name: Middelkamp, S.
name: Kevrekidis, P. G.
name: Frantzeskakis, D. J.
name: Carretero-Gonzalez, R.
name: Schmelcher, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study the existence and stability properties of clusters of alternating charge vortices in Bose-Einstein condensates. It is illustrated that such states emerge from cascades of symmetry-breaking bifurcations that can be analytically tracked near the linear limit of the system via weakly nonlinear few-mode expansions. We present the resulting states that emerge near the first few eigenvalues of the linear limit, and illustrate how the nature of the bifurcations can be used to understand their stability. Rectilinear, polygonal and diagonal vortex clusters are only some of the obtained states while mixed states, consisting of dark solitons and vortex clusters, are identified as well.
description: 8 pages, 7 figures
MPEC 2023-H192 : DAILY ORBIT UPDATE (2023 April 26)
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

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.
Collisional formation of very massive stars in dense clusters
Creators: name: Moeckel, Nickolas
name: Clarke, Cathie J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the contraction of accreting protoclusters using an extension of n-body techniques that incorporates the accretional growth of stars from the gaseous reservoir in which they are embedded. Following on from Monte Carlo studies by Davis et al., we target our experiments toward populous clusters likely to experience collisions as a result of accretion-driven contraction. We verify that in less extreme star forming environments, similar to Orion, the stellar density is low enough that collisions are unimportant, but that conditions suitable for stellar collisions are much more easily satisfied in large-n clusters, i.e. n ~ 30,000 (we argue, however, that the density of the Arches cluster is insufficient for us to expect stellar collisions to have occurred in the cluster's prior evolution). We find that the character of the collision process is not such that it is a route toward smoothly filling the top end of the mass spectrum. Instead, runaway growth of one or two extreme objects can occur within less than 1 Myr after accretion is shut off, resulting in a few objects with masses several times the maximum reached by accretion. The rapid formation of these objects is due to not just the post-formation dynamical evolution of the clusters, but an interplay of dynamics and the accretional growth of the stars. We find that accretion-driven cluster shrinkage results in a distribution of gas and stars that offsets the disruptive effect of gas expulsion, and we propose that the process can lead to massive binaries and early mass segregation in star clusters.
description: 8 pages, accepted to MNRAS
Enrichment of Heavy Elements in the red giant S15-19 in the Sextans Dwarf Spheroidal Galaxy
Creators: name: Honda, Satoshi
name: Aoki, Wako
name: Arimoto, Nobuo
name: Sadakane, Kozo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We determined chemical abundances of the Extremely Metal-Poor (EMP) star S15-19 ([Fe/H]=-3.0) in the Sextans dwarf galaxy. While heavy neutron-capture elements (e.g., Ba) are generally deficient in EMP stars in dwarf galaxies, this object was shown to have an exceptional over-abundance of Ba ([Ba/Fe] +0.5) by a previous study, which is similar to those of r-process-enhanced stars found in the field halo. Our new high-resolution spectroscopy for this object for the blue region, however, reveals that no clear excess of r-process elements, like Eu, appears in this object. Moreover, a significant excess of carbon ([C/Fe]= +1.0) and a deficiency of Sr ([Sr/Fe] = -1.4) are found for this object. Taking the variation of radial velocities measured at the two different epochs into consideration, the origin of the excesses of heavy neutron-capture elements in S15-19 is not the r-process, but is the s-process in an asymptotic giant branch (AGB) star that was the binary companion (primary) of this object. Carbon- and s-process-enhanced material should have been transferred to the surface of S15-19 across the binary system. These results are compared with carbon-enhanced metal-poor stars in the field halo.
description: 18 pages, PASJ in press