cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Patient2Vec: A Personalized Interpretable Deep Representation of the Longitudinal Electronic Health Record
Creators: name: Zhang, Jinghe
name: Kowsari, Kamran
name: Harrison, James H.
name: Lobo, Jennifer M.
name: Barnes, Laura E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Artificial Intelligence (cs.AI)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: The wide implementation of electronic health record (EHR) systems facilitates the collection of large-scale health data from real clinical settings. Despite the significant increase in adoption of EHR systems, this data remains largely unexplored, but presents a rich data source for knowledge discovery from patient health histories in tasks such as understanding disease correlations and predicting health outcomes. However, the heterogeneity, sparsity, noise, and bias in this data present many complex challenges. This complexity makes it difficult to translate potentially relevant information into machine learning algorithms. In this paper, we propose a computational framework, Patient2Vec, to learn an interpretable deep representation of longitudinal EHR data which is personalized for each patient. To evaluate this approach, we apply it to the prediction of future hospitalizations using real EHR data and compare its predictive performance with baseline methods. Patient2Vec produces a vector space with meaningful structure and it achieves an AUC around 0.799 outperforming baseline methods. In the end, the learned feature importance can be visualized and interpreted at both the individual and population levels to bring clinical insights.
description: Accepted by IEEE Access
CAUSAS E COMPLICAÇÕES DO RETINOBLASTOMA: UMA REVISÃO DE LITERATURA
Creators: name: Costa, Bruna Luiza da Silva
name: Araújo, Caroline Leite
name: Lonsdale, Jamylla Santos
name: Martinez, Lívia de Castro
name: Belai, Sâmeque Iagla
name: Barbosa, José Alexandre Lisboa
name: Teles, Vitor Mateus de Araújo Bastos
name: Dias, Sâmela Victória dos Santos
name: Junior, Marcos Antônio da Silva Marques
name: Ferreira, Maria Clara Leal
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Retinoblastoma
subject: Neoplasms
subject: Complicações
subject: Causalidade

description: O retinoblastoma é um tumor maligno que se desenvolve na retina e afeta principalmente crianças pequenas, mais comumente antes dos cinco anos de idade, podendo raramente ser diagnosticado em adultos. O retinoblastoma tem seu diagnóstico muitas vezes dificultado por conta da média de idade dos pacientes, tornando complicado o tratamento. Diante disso, esta revisão busca elucidar as causas subjacentes e as complexas complicações associadas à essa doença, visando a possibilidade de diagnósticos precoces e melhores prognósticos às crianças afetadas com essa patologia. Objetivo: Elencar as principais causas e complicações do retinoblastoma. Metodologia: Trata-se de uma revisão integrativa da literatura, realizada por meio da Biblioteca Virtual de Saúde (BVS) nas bases de dados Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS) e Medical Literature Analysis and Retrievel System Online (MEDLINE). Foram encontrados 460 artigos, através do cruzamento simultâneo entre os descritores “Retinoblastoma”, “Complications” e “Causality”. Sendo selecionados 13 estudos, tendo como critério de inclusão os artigos com texto completo e critério de exclusão os trabalhos duplicados. Resultados: De acordo com os estudos selecionados, as causas do retinoblastoma ainda são vinculadas às mutações genéticas e a hereditariedade, tendo como fator de risco o sexo masculino, média de idade do diagnóstico de 31,7 meses de vida e sendo o olho direito, na maioria das vezes, o mais acometido. No entanto, mais estudos são necessários para determinar as origens dessa patologia. Em relação as complicações do retinoblastoma, a principal é o descolamento total e/ou parcial da retina. Há também complicações secundárias ao desfecho dos tratamentos, tais como diminuição da acuidade visual, estrabismo e exotropia que podem ter melhora com tratamento cirúrgicos. Conclusão: O retinoblastoma é uma doença de difícil diagnóstico, tendo como causa as mutações genéticas e a hereditariedade. E, suas complicações geralmente são associadas ao tratamento da patologia, sendo o descolamento da retina a principal complicação primária. Diante dessa análise, observou-se que ainda se faz necessário mais estudos sobre o assunto, visando esclarecer as incertezas e a complexidade do mesmo.
Anomala pygidialis Kirsch 1876
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Rutelidae
Anomala
Anomala pygidialis

description: Anomala pygidialis Kirsch, 1876
 Anomala pygidialis Kirsch, 1876: 141.
 Material. 4 females, Indonesia, Papua, Yapen I., northern coast, Rosbori village, at light, 13– 14.11.2012, A. M. Prokofiev leg.
 Remarks. This species was originally described from “Rubi [?], in the south of Geelvinksbay” and later was redescribed together with specimens from the Vogelkop Peninsula and the adjacent islands (Misool and Waigeo) (Zorn 2007). Although I did not collected any males, my female specimens are closer to A. pygidialis than to two other very similar species (A. biakensis Zorn, 2007 from Biak I. and A. bruggei Zorn, 2007 from Yapen I. and the adjacent coast of New Guinea) in displaying no any trace of a basal tooth on the protibia and in other minor details (see Zorn 2007: 38). Anomala bruggei co-occurs with A. pygidialis in area near Sorong city (northwestern coast of New Guinea) as well (Zorn 2007).
description: Published as part of Prokofiev, Artem M., 2016, On the Phytophagous Scarabs of the Subfamilies Dynastinae, Rutelinae, and Melolonthinae from the Schouten Islands (Kepulauan Biak), Indonesian Papua (Coleoptera: Scarabaeidae), pp. 71-77 in Species Diversity 21 on page 72, DOI: 10.12782/sd.21.1.071, http://zenodo.org/record/5737668
MerTK receptor cleavage promotes plaque necrosis and defective resolution in atherosclerosis
Creators: name: Bishuang Cai
name: Thorp, Edward B.
name: Doran, Amanda C.
name: Sansbury, Brian E.
name: Daemen, Mat J.A.P.
name: Dorweiler, Bernhard
name: Spite, Matthew
name: Fredman, Gabrielle
name: Tabas, Ira
Publisher: name: Health Research Alliance
Year: 2019
Subjects: Cardiology

description: Atherothrombotic vascular disease is often triggered by a distinct type of atherosclerotic lesion that displays features of impaired inflammation resolution, notably a necrotic core and thinning of a protective fibrous cap that overlies the core. A key cause of plaque necrosis is defective clearance of apoptotic cells, or efferocytosis, by lesional macrophages, but the mechanisms underlying defective efferocytosis and its possible links to impaired resolution in atherosclerosis are incompletely understood. Here, we provide evidence that proteolytic cleavage of the macrophage efferocytosis receptor c-Mer tyrosine kinase (MerTK) reduces efferocytosis and promotes plaque necrosis and defective resolution. In human carotid plaques, MerTK cleavage correlated with plaque necrosis and the presence of ischemic symptoms. Moreover, in fat-fed LDL receptor–deficient (Ldlr–/–) mice whose myeloid cells expressed a cleavage-resistant variant of MerTK, atherosclerotic lesions exhibited higher macrophage MerTK, lower levels of the cleavage product soluble Mer, improved efferocytosis, smaller necrotic cores, thicker fibrous caps, and increased ratio of proresolving versus proinflammatory lipid mediators. These findings provide a plausible molecular-cellular mechanism that contributes to defective efferocytosis, plaque necrosis, and impaired resolution during the progression of atherosclerosis.
Reweighted Manifold Learning of Collective Variables from Enhanced Sampling Simulations
Creators: name: Rydzewski, Jakub
name: Chen, Ming
name: Ghosh, Tushar K.
name: Valsson, Omar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Enhanced sampling methods are indispensable in computational physics and chemistry, where atomistic simulations cannot exhaustively sample the high-dimensional configuration space of dynamical systems due to the sampling problem. A class of such enhanced sampling methods works by identifying a few slow degrees of freedom, termed collective variables (CVs), and enhancing the sampling along these CVs. Selecting CVs to analyze and drive the sampling is not trivial and often relies on physical and chemical intuition. Despite routinely circumventing this issue using manifold learning to estimate CVs directly from standard simulations, such methods cannot provide mappings to a low-dimensional manifold from enhanced sampling simulations as the geometry and density of the learned manifold are biased. Here, we address this crucial issue and provide a general reweighting framework based on anisotropic diffusion maps for manifold learning that takes into account that the learning data set is sampled from a biased probability distribution. We consider manifold learning methods based on constructing a Markov chain describing transition probabilities between high-dimensional samples. We show that our framework reverts the biasing effect yielding CVs that correctly describe the equilibrium density. This advancement enables the construction of low-dimensional CVs using manifold learning directly from data generated by enhanced sampling simulations. We call our framework reweighted manifold learning. We show that it can be used in many manifold learning techniques on data from both standard and enhanced sampling simulations.
description: Published version
Equation of state and critical behavior of polymer models: A quantitative comparison between Wertheim's thermodynamic perturbation theory and computer simulations
Creators: name: MacDowell, L. González
name: Mueller, M.
name: Vega, C.
name: Binder, K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present an application of Wertheim's Thermodynamic Perturbation Theory (TPT1) to a simple coarse grained model made of flexibly bonded Lennard-Jones monomers. We use both the Reference Hyper-Netted-Chain (RHNC) and Mean Spherical approximation (MSA) integral equation theories to describe the properties of the reference fluid. The equation of state, the density dependence of the excess chemical potential, and the critical points of the liquid--vapor transition are compared with simulation results and good agreement is found. The RHNC version is somewhat more accurate, while the MSA version has the advantage of being almost analytic. We analyze the scaling behavior of the critical point of chain fluids according to TPT1 and find it to reproduce the mean field exponents: The critical monomer density is predicted to vanish as $n^{-1/2}$ upon increasing the chain length $n$ while the critical temperature is predicted to reach an asymptotic finite temperature that is attained as $n^{-1/2}$. The predicted asymptotic finite critical temperature obtained from the RHNC and MSA versions of TPT1 is found to be in good agreement with the $Θ$ point of our polymer model as obtained from the temperature dependence of the single chain conformations.
description: to appear in J.Chem.Phys
MerTK cleavage limits proresolving mediator biosynthesis and exacerbates tissue inflammation
Creators: name: Bishuang Cai
name: Thorp, Edward B.
name: Doran, Amanda C.
name: Manikandan Subramanian
name: Sansbury, Brian E.
name: Chyuan-Sheng Lin
name: Spite, Matthew
name: Fredman, Gabrielle
name: Tabas, Ira
Publisher: name: Health Research Alliance
Year: 2019
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: The acute inflammatory response requires a coordinated resolution program to prevent excessive inflammation, repair collateral damage, and restore tissue homeostasis, and failure of this response contributes to the pathology of numerous chronic inflammatory diseases. Resolution is mediated in part by long-chain fatty acid-derived lipid mediators called specialized proresolving mediators (SPMs). However, how SPMs are regulated during the inflammatory response, and how this process goes awry in inflammatory diseases, are poorly understood. We now show that signaling through the Mer proto-oncogene tyrosine kinase (MerTK) receptor in cultured macrophages and in sterile inflammation in vivo promotes SPM biosynthesis by a mechanism involving an increase in the cytoplasmic:nuclear ratio of a key SPM biosynthetic enzyme, 5-lipoxygenase. This action of MerTK is linked to the resolution of sterile peritonitis and, after ischemia–reperfusion (I/R) injury, to increased circulating SPMs and decreased remote organ inflammation. MerTK is susceptible to ADAM metallopeptidase domain 17 (ADAM17)-mediated cellsurface cleavage under inflammatory conditions, but the functional significance is not known. We show here that SPM biosynthesis is increased and inflammation resolution is improved in a new mouse model in which endogenous MerTK was replaced with a genetically engineered variant that is cleavage-resistant (MertkCR). MertkCR mice also have increased circulating levels of SPMs and less lung injury after I/R. Thus, MerTK cleavage during inflammation limits SPM biosynthesis and the resolution response. These findings contribute to our understanding of how SPM synthesis is regulated during the inflammatory response and suggest new therapeutic avenues to boost resolution in settings where defective resolution promotes disease progression.
On Archimedean Zeta Functions and Newton Polyhedra
Creators: name: Aroca, Fuensanta
name: Gómez-Morales, Mirna
name: León-Cardenal, Edwin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Functional Analysis (math.FA)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 42B20, 14M25, 58K05, 14B05

description: Let $f$ be a polynomial function over the complex numbers and let $ϕ$ be a smooth function over $\mathbb{C}$ with compact support. When $f$ is non-degenerate with respect to its Newton polyhedron, we give an explicit list of candidate poles for the complex local zeta function attached to $f$ and $ϕ$. The provided list is given just in terms of the normal vectors to the supporting hyperplanes of the Newton polyhedron attached to $f$. More precisely, our list does not contain the candidate poles coming from the additional vectors required in the regular conical subdivision of the first orthant, and necessary in the study of local zeta functions through resolution of singularities. Our results refine the corresponding results of Varchenko and generalize the results of Denef and Sargos in the real case, to the complex setting.
description: 19 pages. Comments welcome!
Hear $π$ from Quantum Galperin Billiards
Creators: name: Cai, Yin
name: Zhang, Fu-Lin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Galperin introduced an interesting method to learn the digits of $π$ by counting the collisions of two billiard balls and a hard wall. This paper studies two quantum versions of the Galperin billiards. It is shown that the digits of $π$ can be observed in the phase shifts of the quantum models.
description: published version
Unified description of pairing and quarteting correlations within the particle-hole-boson approach
Creators: name: Baran, V. V.
name: Delion, D. S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the description of single-species and isovector pairing correlations in the framework of the projected-BCS (PBCS) and the Quartet Condensation Model (QCM) from a particle-hole perspective and we introduce the representation of the QCM quartet condensate state in terms of particle-hole excitations with respect to the Hartree-Fock state. We also present a new bosonic approximation for both PBCS and QCM. In each case, the starting point is the reformulation of the pair/quartet condensate state in terms of particle-hole excitations with respect to the Hartree-Fock state. The main simplification of our approach is the assumption that the pair operators corresponding to both particle and hole states obey bosonic commutation relations. This simplifies tremendously the computations and allows for an analytic derivation of the averaged Hamiltonian on the condenstate state as a function of the mixing amplitudes. We study both the pure bosonic approach and the renormalized version, and compare the particle-hole bosonic version to the naive prescription of applying the boson approximation directly to the original condensate state. We compare the fermionic and the renormalized particle-hole bosonic approach in the case of a picket fence model of doubly degenerate states and in a realistic shell model space with an effective interaction for the $N=Z$ nuclei above $^{100}$Sn.
description: 17 pages, 8 figures
The Extraplanar Type II Supernova ASASSN-14jb in the Nearby Edge-on Galaxy ESO 467-G051
Creators: name: Meza, Nicolas
name: Prieto, J. L.
name: Clocchiatti, A.
name: Galbany, L.
name: Anderson, J. P.
name: Falco, E.
name: Kochanek, C. S.
name: Kuncarayakti, H.
name: Brimacombe, J.
name: Holoien, T. W. -S.
name: Shappee, B. J.
name: Stanek, K. Z.
name: Thompson, T. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present optical photometry and spectroscopy of the Type II supernova ASASSN-14jb, together with VLT MUSE IFU observations of its host galaxy and a nebular-phase spectrum. This SN, in the nearby galaxy ESO 467-G051 ($z=0.006$), was discovered and followed-up by the All Sky Automated Survey for SuperNovae (ASAS-SN). We present LCOGTN $BVgri$ and $Swift$ $w2m1w1ubv$ optical and near-UV/optical light curves and several optical spectra in the early photospheric phase. ASASSN-14jb exploded $\sim 2$ kpc above the star-forming disk of ESO 467-G051, an edge-on disk galaxy. The large projected distance from the disk and non-detection of any H II region in a 1.4 kpc radius in projection are in conflict with the standard environment of core-collapse supernova progenitors and suggests the possible scenario that the progenitor received a kick in a binary interaction. Our analysis yields $D=25\pm 1$ Mpc, $M(^{56}Ni) = 0.0210 \pm 0.0025$ M$_\odot$, $E_{exp}\approx 0.25 \times 10^{51}$ ergs, $M_{ej}\approx 6$ M$_\odot$, and progenitor $R_* = 580 \pm 28$ R$_\odot$, which seems to be consistent with the sub-Solar metallicity of $0.3 \pm 0.1$ Z$_\odot$ derived from the SN spectrum. The nebular spectrum constrains $M_{prog} \simeq 10-12 $ M$_{\odot}$. We discuss the low oxygen abundance of the host galaxy derived from the MUSE data, $12+\log{(O/H)} = 8.27^{+0.16}_{-0.20}$ (O3N2 strong line method), and compare it with the supernova spectra, which is also consistent with a sub-Solar metallicity progenitor. We finally discuss the possible scenarios for the unusual environment for ASASSN-14jb and conclude that either the in-situ star formation or a runaway would imply a low mass progenitor, agreeing with our estimate from the supernova nebular spectrum. We show that the detailed study of the environment can agree with the stronger constrains of the transient observations. (abridged)
description: 24 pages, submitted to A&A
Circumnuclear kinematics in NGC 5248: the origin of nuclear spiral arms
Creators: name: Laine, S.
name: Knapen, J. H.
name: Perez-Ramirez, D.
name: Englmaier, P.
name: Matthias, M.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present for the first time a two-dimensional velocity field of the central region of the grand-design spiral galaxy NGC 5248, at 0.9 arcsec spatial resolution. The H-alpha velocity field is dominated by circular rotation. While no systematic streaming motions are seen in the area of the nuclear grand-design spiral or the circumnuclear ring, the amplitude of residual velocities, after subtracting a model circular velocity field, reaches 20 km/s in projection. The rotation curve levels out at around 140 km/s, after a well-resolved and rather shallow rise. We have generated an analytical model for the nuclear spiral and fitted it to our observations to obtain estimates of the pattern speed of the spiral and the sound speed in the central region of NGC 5248. Our results are consistent with a low pattern speed, suggesting that the nuclear spiral rotates with the same rate as the main spiral structure in NGC 5248, and thus that the spiral structure is coupled from scales of a few hundred parsecs to several kiloparsecs. We have also compared the observed structure and kinematics between the nuclear regions of NGC 5248 and M100. Several similarities and differences are discussed, including the location of the peak emission regions on major and minor axes, and the spiral arm streaming motions. We find no kinematic evidence for a presence of a nuclear bar in NGC 5248.
description: Accepted for publication in MNRAS
Additional file 11: of Genome-wide association analysis of nutrient traits in the oyster Crassostrea gigas: genetic effect and interaction network
Creators: name: Meng, Jie
name: Song, Kai
name: Li, Chunyan
name: Liu, Sheng
name: Shi, Ruihui
name: Li, Busu
name: Wang, Ting
name: Li, Ao
name: Que, Huayong
name: Li, Li
name: Zhang, Guofan
Publisher: name: figshare
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Figure S2 F1 breeding methods of 427 individuals collected from the world-wide scale. The females collected were mated with the males cultured in Qingdao and generated 427 family lines. They were cultured in the same environment for approximately one year, and then 30 individuals in each family line were collected and used for phenotype measurement. (DOCX 124 kb)
Perioperative management of the patient on buprenorphine with or without naloxone for the anesthesia provider
Creators: name: Abdallah, Ayah
name: Antunes, Bernadette
Publisher: name: No Publisher Supplied
Year: 2021

description: Project Purpose: The increased popularity to prescribe buprenorphine (BUP) or buprenorphine with naloxone (BUP/N) is attributed to its ease of access, convenient use for the patient, its ability to decrease withdrawal symptoms/cravings, and its association with decreased opioid-related mortality. Research has shown that characteristics of BUP agents including the increased affinity for μ-opioid receptor can inhibit or decrease the actions of conventional opioids. Undertreatment of acute pain risks precipitation of opioid use disorder, relapse and is considered suboptimal. Anesthesia providers may encounter the patient receiving BUP or BUP/N therapy in the perioperative period due to its increased popularity. This study aimed to evaluate whether the completion of an online point-of-care practice recommendation module increased perceived confidence of the anesthesia provider in the management of the BUP or BUP/N patient undergoing surgery. Methodology: The project was based on a quantitative correlation prospective design that utilized a pre- and post-module survey that measured the perceived confidence level of Certified Registered Nurse Anesthetists (n = 24) and Resident Registered Nurse Anesthetists (n = 40). Analysis of the data was completed by conducting paired sample t-tests for both groups. Results: Both groups demonstrated a statistically significant ( p < .05) increase in perceived confidence after completion of the online module. Implications for Practice: The results indicated that an online module does have an impact on the anesthesia provider’s perceived confidence in the management of the specified patient population. On this basis, it is recommended that anesthesia providers maintain familiarity with the latest literature, practice considerations and guidelines directed at the perioperative management of patients treated with BUP or BUP/N.
A high-granularity calorimeter insert based on SiPM-on-tile technology at the future Electron-Ion Collider
Creators: name: Arratia, Miguel
name: Barish, Kenneth
name: Blanchard, Liam
name: Huang, Huan Z.
name: Ji, Zhongling
name: Karki, Bishnu
name: Long, Owen
name: Milton, Ryan
name: Paul, Ananya
name: Paul, Sebouh J.
name: Preins, Sean
name: Schmookler, Barak
name: Tsai, Oleg
name: Xu, Zhiwan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present a design for a high-granularity calorimeter insert for future experiments at the Electron-Ion Collider (EIC). The sampling-calorimeter design uses scintillator tiles read out with silicon photomultipliers. It maximizes coverage close to the beampipe, while solving challenges arising from the beam-crossing angle and mechanical integration. It yields a compensated response that is linear over the energy range of interest for the EIC. Its energy resolution meets the requirements set in the EIC Yellow Report even with a basic reconstruction algorithm. Moreover, this detector will provide 5D shower data (position, energy, and time), which can be exploited with machine-learning techniques. This detector concept has the potential to unleash the power of imaging calorimetry at the EIC to enable measurements at extreme kinematics in electron-proton and electron-nucleus collisions.
The potential energy states and mechanical properties of thermally cycled binary glasses
Creators: name: Priezjev, Nikolai V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The influence of repeated thermal cycling on mechanical properties, structural relaxation, and evolution of the potential energy in binary glasses is investigated using molecular dynamics simulations. We consider a binary mixture with strongly non-additive cross interactions, which is annealed across the glass transition with different cooling rates and then exposed to one thousand thermal cycles at constant pressure. We found that during the first few hundred transient cycles, the potential energy minima after eachcycle gradually decrease and the structural relaxation proceeds via collective, irreversible displacements of atoms. With increasing cycle number, the amplitudes of the volume and potential energy oscillations are significantly reduced, and the potential energy minima saturate to a constant value that depends on the thermal amplitude and cooling rate. In the steady state, the glasses thermally expand and contract but most of the atoms return to theircages after each cycle, similar to limit cycles found in periodically driven amorphous materials. The results of tensile tests demonstrate that the elastic modulus and the yielding peak, evaluated after the thermal treatment, acquire maximum values at a particular thermal amplitude, which coincides with the minimum of the potential energy.
description: 23 pages, 10 figures
Dual Quantum Monte Carlo Algorithm for Hardcore Bosons
Creators: name: Batrouni, G. G.
name: Mabilat, H.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We derive the exact dual representation of the bosonic Hubbard model which takes the form of conserved current loops. The hardcore limit, which corresponds to the quantum spin-${1\over 2}$ Heisenberg antiferromagnet, is also obtained. In this limit, the dual partition function takes a particularly simple form which is very amenable to numerical simulations. In addition to the usual quantities that we can measure (energy, density-density correlation function and superfluid density) we can with this new algorithm measure efficiently the order parameter correlation function, $, |i-j|\ge 1$. We demonstrate this with numerical tests in one dimension.
description: 15 pages, 4 figures . Talk given at CCP1998, Granada, Spain
Data-driven modeling of hypersonic reentry flow with heat and mass transfer
Creators: name: Gkimisis, Leonidas
name: Dias, Bruno Ricardo Barros
name: Scoggins, James B.
name: Magin, Thierry
name: Mendez, Miguel Alfonso
name: Turchi, Alessandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The entry phase constitutes a design driver for aerospace systems that include such a critical step. This phase is characterized by hypersonic flows encompassing multiscale phenomena that require advanced modeling capabilities. However, since high fidelity simulations are often computationally prohibitive, simplified models are needed in multidisciplinary analyses requiring fast predictions. This work proposes data-driven surrogate models to predict the flow, and mixture properties along the stagnation streamline of hypersonic flows past spherical objects. Surrogate models are designed to predict velocity, pressure, temperature, density and air composition as a function of the object's radius, velocity, reentry altitude and surface temperature. These models are trained with data produced by numerical simulation of the quasi-one-dimensional Navier-Stokes formulation and a selected Earth atmospheric model. Physics-constrained parametric functions are constructed for each flow variable of interest, and artificial neural networks are used to map the model parameters to the model's inputs. Surrogate models were also developed to predict surface quantities of interest for the case of nonreacting or ablative carbon-based surfaces, providing alternatives to semiempirical correlations. A validation study is presented for all the developed models, and their predictive capabilities are showcased along selected reentry trajectories of space debris from low-Earth orbits.
Xylotrupes clinias Schaufuss 1885
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dynastidae
Xylotrupes
Xylotrupes clinias

description: Xylotrupes clinias Schaufuss, 1885
 Xylotrupes clinias Schaufuss, 1885: 192.
 Material. 3 males, 4 females, Indonesia, Papua, Biak I., Biak Kota, Samau village, Nirmala Hotel, 08– 20.11.2012, A. M. Prokofiev leg.; 2 males, 3 females, Biak Utar, near Napdori village, 2–3 km from right bank of Air Napdori river, black light, 10–11 and 18– 19.11.2012, A. M. Prokofiev leg.
 Remarks. This species has been known hitherto from Sulawesi and the Moluccas eastward to the Kei Islands (Rowland 2011). The populations from the main island of New Guinea and the Aru Islands were separated as X. carinulus Rowland, 2011 (loc.cit.). Surprisingly, the specimens from Biak possess well-developed pronotal carinae, which is not characteristic for a New Guinean species. A direct comparison of the Schouten specimens with specimens from Ceram and Ambon Is. (X. clinias) and Fak-Fak Mts., New Guinea (X. carinulus) shows their full identity with the former species. The presence of beetles morphologically identical to the Moluccan form on the Geelvink Bay islands indicates that the distribution of this form extends rather far eastward along the northwestern coast of New Guinea. On the other hand, the differences between X. clinias and X. carinulus may represent population variability rather than specific differences, inasmuch as both nominal species have the same structure of the raspulae (Rowland 2003, 2011), and populations with developed pronotal carinae may be sparsely distributed among populations that lack such carinae. Arguing against this, however, Rowland (2011) considered the pronotal structure to be a very stable character for X. carinulus based on his examination of more than 200 males from the whole assumed range of distribution.
description: Published as part of Prokofiev, Artem M., 2016, On the Phytophagous Scarabs of the Subfamilies Dynastinae, Rutelinae, and Melolonthinae from the Schouten Islands (Kepulauan Biak), Indonesian Papua (Coleoptera: Scarabaeidae), pp. 71-77 in Species Diversity 21 on page 72, DOI: 10.12782/sd.21.1.071, http://zenodo.org/record/5737668
Higgsino Dark Matter in an economical Scherk-Schwarz setup
Creators: name: Delgado, Antonio
name: Martin, Adam
name: Quiros, Mariano
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a minimal natural supersymmetric model based on an extra dimension with supersymmetry breaking provided by the Scherk-Schwarz mechanism. The lightest supersymmetric particle is a neutral, quasi-Dirac Higgsino and, unlike in previous studies, we assume that all Standard Model fields are propagating in the bulk. The resulting setup is minimal, as neither extra matter, effective operators, nor extra $U(1)$ groups are needed in order to be viable. The model has three free parameters which are fixed by the Higgsino mass -- set to the range 1.1-1.2 TeV so it can play the role of Dark Matter, and by the requirements of correct electroweak breaking and the mass of the Higgs. After imposing the previous conditions we find a benchmark scenario that passes all experimental constrains with an allowed range for the supersymmetric parameters. In particular we have found gluinos in the range 2.0-2.1 TeV mass, electroweakinos and sleptons almost degenerate in the range 1.7-1.9 TeV and squarks degenerate in the range 1.9-2.0 TeV. The best discovery prospects are: i.) gluino detection at the high luminosity LHC ($\gtrsim 3\, \text{ab}^{-1}$), and ii.) Higgsino detection at next-generation dark matter direct detection experiments. The model is natural, as the fine-tuning for the fixed values of the parameters is moderate mainly because supersymmetry breaking parameters contribute linearly to the Higgs mass parameter, rather than quadratically as in most models.
description: 20 pages, 4 figures, new range for Higgsino mass considered and LHC bounds recalculated
Chain stiffness intensifies the reptation characteristics of polymer dynamics in the melt
Creators: name: Faller, Roland
name: Mueller-Plathe, Florian
Publisher: name: arXiv
Year: 2000
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The reptation concept in polymer dynamics is studied for model chains with added stiffness. The main idea of a chain diffusing inside a tube can be transferred from fully flexible chains. However, the picture, which renormalizes the chain of locally stiff Kuhn segments onto a flexible chain of fewer segments fails. The entanglement length shrinks with increasing persistence length. If entanglement length and persistence length come to the same order of magnitude the picture of a tight tube is better suited, in which chain segments can move only along the contour, any transverse motion being much reduced. Thus, as stiffness increases, the monomers loose their freedom to perform random walks inside the tube, the ``Rouse-like'' part of their dynamics. As a result, for persistence lengths of more than five monomers no length scale can be described by the Rouse model.
description: 10 pages revtex, 5 figures, partly color
Additional file 13: of Genome-wide association analysis of nutrient traits in the oyster Crassostrea gigas: genetic effect and interaction network
Creators: name: Meng, Jie
name: Song, Kai
name: Li, Chunyan
name: Liu, Sheng
name: Shi, Ruihui
name: Li, Busu
name: Wang, Ting
name: Li, Ao
name: Que, Huayong
name: Li, Li
name: Zhang, Guofan
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology
subject: Virology

description: Figure S4 Amino acid composition in all 427 individuals. (A) Among all detected amino acids. Glu and Tau accounted for 14 and 11% of TAA content, respectively, and they represent the amino acids with the highest content in C. gigas. (B) Among all detected amino acids, six DAA accounted for 41% of TAA content. (DOCX 692 kb)
Big-bang nucleosynthesis with the NACRE compilation
Creators: name: Coc, Alain
name: Vangioni-Flam, Elisabeth
name: Casse, Michel
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We update the Big Bang Nucleosynthesis (BBN) calculations on the basis of the recent NACRE compilation of reaction rates. In particular, we calculate the uncertainties related to the nuclear reaction rates on the abundances of 7Li and compare our results with an other recent analysis.
description: Contribution to the "Cosmic Evolution" conference, to celebrate the 60th birthday of Jean Audouze and James W. Truran
Massive Argon Space Telescope (MAST): a concept of heavy time projection chamber for gamma-ray astronomy in the 100 MeV --- 1 TeV energy range
Creators: name: Dzhatdoev, Timur
name: Podlesnyi, Egor
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We explore the concept of liquid Argon time projection chamber (TPC) for gamma-ray astronomy in the 100 MeV --- 1 TeV energy range. We propose a basic layout for such a telescope called MAST. Using a last-generation rocket such as Falcon Heavy, it is possible to launch a detector with the effective area and the differential sensitivity about one order of magnitude better than the Fermi-LAT ones. At the same time, the MAST concept allows for an excellent angular resolution, 3-10 times better than the Fermi-LAT one depending on the energy, and good energy resolution ($\approx$ 20 % at 100 MeV and 6-10 % for the 10 GeV --- 1 TeV energy range). We show that such a telescope would be instrumental in a broad range of long-standing astrophysical problems.
description: To appear in Astroparticle Physics; 7 pages, 2 figures. This is the author's version of the paper and not the final typeset. Comments are very welcome!
Perioperative management of the patient on buprenorphine with or without naloxone for the anesthesia provider
Creators: name: Antunes, Bernadette
name: Abdallah, Ayah
Publisher: name: No Publisher Supplied
Year: 2021

description: Project Purpose: The increased popularity to prescribe buprenorphine (BUP) or buprenorphine with naloxone (BUP/N) is attributed to its ease of access, convenient use for the patient, its ability to decrease withdrawal symptoms/cravings, and its association with decreased opioid-related mortality. Research has shown that characteristics of BUP agents including the increased affinity for μ-opioid receptor can inhibit or decrease the actions of conventional opioids. Undertreatment of acute pain risks precipitation of opioid use disorder, relapse and is considered suboptimal. Anesthesia providers may encounter the patient receiving BUP or BUP/N therapy in the perioperative period due to its increased popularity. This study aimed to evaluate whether the completion of an online point-of-care practice recommendation module increased perceived confidence of the anesthesia provider in the management of the BUP or BUP/N patient undergoing surgery. Methodology: The project was based on a quantitative correlation prospective design that utilized a pre- and post-module survey that measured the perceived confidence level of Certified Registered Nurse Anesthetists (n = 24) and Resident Registered Nurse Anesthetists (n = 40). Analysis of the data was completed by conducting paired sample t-tests for both groups. Results: Both groups demonstrated a statistically significant ( p < .05) increase in perceived confidence after completion of the online module. Implications for Practice: The results indicated that an online module does have an impact on the anesthesia provider’s perceived confidence in the management of the specified patient population. On this basis, it is recommended that anesthesia providers maintain familiarity with the latest literature, practice considerations and guidelines directed at the perioperative management of patients treated with BUP or BUP/N.
Nilpotent Lie algebras with two centralizer dimensions over a finite field
Creators: name: Kundu, Rijubrata
name: Naik, Tushar Kanta
name: Singh, Anupam
Publisher: name: arXiv
Year: 2022
Subjects: subject: Rings and Algebras (math.RA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 17B05, 17B30

description: A result of Barnea and Isaacs states that if $L$ is a finite dimensional nilpotent Lie algebra with exactly two distinct centralizer dimensions, then nilpotency class of $L$ is either $2$ or $3$. In this article, we classify all such finite dimensional $3$-step nilpotent Lie algebras over a finite field.
The Anti-Jahn-Teller Polaron in LaMnO$_3$
Creators: name: Allen, Philip B.
name: Perebeinos, Vasili
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Distortions of the oxygen sublattice couple to $e_g$ orbitals of Mn$^{3+}$ and drive a cooperative Jahn-Teller (orbital ordering) transition in LaMnO$_3$. A simple model for this transition is studied. Without further adjustment, the model predicts the shape and stability of small (anti-Jahn-Teller) polarons which form when holes are doped into the material. This leads to a new description of the lightly doped insulator, the anti-ferromagnetic to ferromagnetic transition, and the metal-insulator transition.
description: 8 pages, 5 figures; The revised version contains a discussion of the antiferromagnetic A to Ferromagnetic phase boundary, and an appendix giving details of the perturbative calculations
Parastasia novoguineensis Ohaus 1898
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Protozoa
Euglenozoa
Peranemea
Natomonadida
Astasiidae
Parastasia
Parastasia novoguineensis

description: Parastasia novoguineensis Ohaus, 1898
 Parastasia novoguineensis Ohaus, 1898: 22.
 Material. 1 female, Indonesia, Papua, Yapen I., northern coast, Rosbori village, at light, 13– 14.11.2012, A. M. Prokofiev leg.
 Remarks. This is an uncommon but widely distributed Papuan species known from New Guinea and nearby islands including the Solomon Islands (Prokofiev 2014).
description: Published as part of Prokofiev, Artem M., 2016, On the Phytophagous Scarabs of the Subfamilies Dynastinae, Rutelinae, and Melolonthinae from the Schouten Islands (Kepulauan Biak), Indonesian Papua (Coleoptera: Scarabaeidae), pp. 71-77 in Species Diversity 21 on page 72, DOI: 10.12782/sd.21.1.071, http://zenodo.org/record/5737668
Is the Fast Evolution Scenario for Virialized Compact Groups Really Compelling? The Role of a Dark Massive Group Halo
Creators: name: Gomez-Flechoso, M. A.
name: Dominguez-Tenreiro, R.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on results of N-body simulations aimed at testing the hypothesis that galaxies in X-ray emitting (i.e., virialized) Compact Groups are not tidally stripped when they are embedded in a common, massive, quiescent dark matter halo. To disentangle the effects of interactions from spurious effects due to an incorrect choice of the initial galaxy model configurations, these have been chosen to be tidally-limited King spheres, representing systems in quasi-equilibrium within the tidal field of the halo. The potential of the halo has been assumed to be frozen and the braking due to dynamical friction neglected. Our results confirm the hypothesis of low rates of tidal stripping and suggest a scenario for virialized Compact Group evolution in their quiescent phases with only very moderate tidally induced galaxy evolution can be generally expected. This implies the group stability, provided that the dynamical friction timescales in these systems are not much shorter than the Hubble time. We discuss briefly this possibility, in particular taking account of the similarity between the velocity dispersions of a typical virialized Compact Groups and the internal velocity dispersion of typical member galaxies. A number of puzzling observational data on Compact Groups can be easily explained in this framework. Other observations would be better understood as the result of enhanced merging activity in the proto-group environment, leading to virialized Compact Group formation through mergers of lower mass halos, as predicted by hierarchical scenarios of structure formation.
description: 18 pages, 1 postscript file, 2 tables, to be published in ApJLett
Vitexnegheteroin M, a new phenolic glycoside from Vitex negundo var. heterophylla
Creators: name: Huang, Ye
name: Ding, Guo-Yu
name: Hu, Ping
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
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

description: The investigation of chemical constituents from the leaves and seeds of Vitex negundo var. heterophylla resulted in the isolation of one new phenolic glycoside, vitexnegheteroin M (1), together with eleven known compounds (2-12). Their structures were elucidated through extensive spectroscopic analyses including 1D, 2D NMR, HR-ESI-MS, and by comparison with the literature. Among them, compound 3 was obtained from the Vitex genus for the first time, and compounds 4-8, and 10-12 were isolated from this plant for the first time. Their anti-inflammatory activities were investigated by measuring nitric oxide (NO) production in lipopolysaccharide (LPS)-induced murine microglial BV-2 cells. As the obtained results, compound 9 showed the strongest inhibitory activity against LPS-stimulated NO production in BV-2 cells with IC50 value ranging from 8.65 ± 0.67 μM.