cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the concept of a filtered bundle
Creators: name: Bruce, Andrew James
name: Grabowska, Katarzyna
name: Grabowski, Janusz
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 55R10, 58A20, 16W70, 13F20

description: We present the notion of a filtered bundle as a generalisation of a graded bundle. In particular, we weaken the necessity of the transformation laws for local coordinates to exactly respect the weight of the coordinates by allowing more general polynomial transformation laws. The key examples of such bundles include affine bundles and various jet bundles, both of which play fundamental roles in geometric mechanics and classical field theory. We also present the notion of double filtered bundles which provide natural generalisations of double vector bundles and double affine bundles. Furthermore, we show that the linearisation of a filtered bundle - which can be seen as a partial polarisation of the admissible changes of local coordinates - is well defined.
description: 23 pages
Quantum state engineering in a five-state chainwise system by coincident pulse technique
Creators: name: Zhang, Jiahui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, an exact analytical solution is presented for achieving coherent population transfer and creating arbitrary coherent superposition states in a five-state chainwise system by a train of coincident pulses. We show that the solution of a five-state chainwise system can be reduced to an equivalent three-state $Λ$-type one with the simplest resonant coupling under the assumption of adiabatic elimination (AE) together with a requirement of the relation among the four incident pulses. In this method, all of four incident pulses at each step all have the same time dependence, but with specific magnitudes. The results show that, by using a train of appropriately coincident incident pulses, this technique enables complete population transfer, as well as the creation of arbitrary desired coherent superposition between initial and final states, while the population in all intermediate states is effectively suppressed. The complete physical explanation of the underlying mechanism is presented. The results are of potential interest in applications where high-fidelity multi-state quantum control is essential, e.g., quantum information, atom optics, formation of ultracold molecules, cavity QED, nuclear coherent population transfer, light transfer in waveguide arrays, etc.
Geometry of quantum dynamics in infinite dimension
Creators: name: Grabowski, Janusz
name: Kus, Marek
name: Marmo, Giuseppe
name: Shulman, Tatiana
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We develop a geometric approach to quantum mechanics based on the concept of the Tulczyjew triple. Our approach is genuinely infinite-dimensional and including a Lagrangian formalism in which self-adjoint (Schroedinger) operators are obtained as Lagrangian submanifolds associated with the Lagrangian. As a byproduct we obtain also results concerning coadjoint orbits of the unitary group in infinite dimension, embedding of the Hilbert projective space of pure states in the unitary group, and an approach to self-adjoint extensions of symmetric relations.
description: 32 pages
Structure in the speed of sound: from neutron stars to heavy-ion collisions
Creators: name: Yao, Nanxi
name: Sorensen, Agnieszka
name: Dexheimer, Veronica
name: Noronha-Hostler, Jacquelyn
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: From the observation of both heavy neutron stars and light ones with small radii, one anticipates a steep rise in the speed of sound of nuclear matter as a function of baryon density up to values close to the causal limit. A question follows whether such behavior of the speed of sound in neutron-rich matter is compatible with the equation of state extracted from low-energy heavy-ion collisions. In this work, we consider a family of neutron star equations of state characterized by a steep rise in the speed of sound, and use the symmetry energy expansion to obtain equations of state applicable to the almost-symmetric nuclear matter created in heavy-ion collisions. We then compare collective flow data from low-energy heavy-ion experiments with results of simulations obtained using the hadronic transport code SMASH with the mean-field potential reproducing the density-dependence of the speed of sound. We show that equations of state featuring a peak in the speed of sound squared occurring at densities between 2-3 times the saturation density of normal nuclear matter, producing neutron stars of nearly M_max~2.5 M_Sun, are consistent with heavy-ion collision data.
description: Updated version for journal submission
Super Fermi polaron and Nagaoka ferromagnetism in a two-dimesnional square lattice
Creators: name: Hu, Hui
name: Wang, Jia
name: Liu, Xia-Ji
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider the Fermi polaron problem of an impurity hopping around a two-dimensional square lattice and interacting with a sea of fermions at given filling factor. When the interaction is attractive, we find standard Fermi polaron quasiparticles, categorized as attractive polarons and repulsive polarons. When the interaction becomes repulsive, interestingly, we observe an unconventional highly-excited polaron quasiparticle, sharply peaked at the corner of the first Brillouin zone with momentum \mathbf{k}=(\pmπ,\pmπ). This super Fermi polaron branch arises from the dressing of the impurity's motion with holes, instead of particles of fermions. We show that super Fermi polarons become increasingly well-defined with increasing impurity-fermion repulsions and might be considered as a precursor of Nagaoka ferromagnetism, which would appear at sufficiently large repulsions and at large filling factors. We also investigate the temperature-dependence of super Fermi polarons and find that they are thermally robust against the significant increase in temperature.
description: 11 pages, 10 figures
Quasi-Lie schemes for PDEs
Creators: name: Carinena, Jose F.
name: Grabowski, Janusz
name: de Lucas, Javier
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 34A26 (Primary), 34A05, 34A34, 17B66, 22E70 (Secondary)

description: The theory of quasi-Lie systems, i.e. systems of first order ordinary differential equations which can be related via a generalised flow to Lie systems, is extended to systems of partial differential equations and its applications to obtaining $t$-dependent superposition rules and integrability conditions are analysed. We develop a procedure of constructing quasi-Lie systems through a generalisation to PDEs of the so-called theory of quasi-Lie schemes. Our techniques are illustrated with the analysis of Wess-Zumino-Novikov-Witten models, generalised Abel differential equations, Baecklund transformations, as well as other differential equations of physical and mathematical relevance.
description: 32 pages
The Toolkit for Nuclei library (TkN): a C++ interface to nuclear databases
Creators: name: Dudouet, Jérémie
name: Gruyer, Diego
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Over the past few decades, a vast amount of information on the structure of atomic nuclei has been collected, compiled, and evaluated. Accurate and reliable data are essential for the understanding of the behavior of atomic nuclei. Accessing and utilizing these data, spread among different databases, has remained challenging for many researchers due to the complexity and diversity of data formats. This article presents the Toolkit for Nuclei (TkN) C++ open-source library that provides easy access to nuclear structure data. This library is intended to be used in theoretical models, data analysis software or simulation codes. It utilizes a comprehensive database built from different official sources and frequently updated. The user interface allows to easily access and search for nuclear structure data and TkN can be compiled without any dependencies, facilitating its incorporation into various research projects.
description: 10 pages, 3 figures, 5 tables
An Estimate of the Impact of Reionization on Supermassive Black Hole Growth
Creators: name: Sanderbeck, Phoebe R. Upton
name: Johnson, Jarrett L.
name: Marshall, Madeline A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The supermassive black holes (SMBHs) that power active galactic nuclei found at $z > 6$ were formed during the epoch of reionization. Because reionization is an inhomogeneous process, the physical properties of SMBH host galaxy environments will vary spatially during reionization. We construct a semi-analytic model to estimate the impact of reionization on SMBH growth. Using a series of merger trees, reionization models, and black hole growth models, we find that early reionization can reduce an SMBH's mass by up to [50, 70, 90] % within dark matter halos of mass [$10^{12}$, $10^{11}$, $10^{10}$] M$_{\odot}$ by $z$ = 6. Our findings also suggest that the redshift range in which black hole growth is impacted by reionization strongly depends on whether the Eddington accretion rate can be exceeded. If so, we find that black hole masses are significantly suppressed principally during the early phases of reionization ($z$ > 10), while they are more readily suppressed across the full redshift range if super-Eddington growth is not allowed. We find that the global average impact of reionization may be to reduce the masses of black holes residing in < 10$^{11}$ M$_{\odot}$ halos by a factor of > 2. The census of supermassive black holes being uncovered by the James Webb Space Telescope may offer a means to test the basic prediction that more massive black holes reside in cosmological volumes that are reionized at later times.
description: 12 pages, 8 figures. Accepted to ApJ
Upscaling of unsaturated flow in fractured porous media
Creators: name: List, Florian
name: Kumar, Kundan
name: Pop, Iuliu Sorin
name: Radu, Florin A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this work, we consider a mathematical model for flow in a unsaturated porous medium containing a fracture. In all subdomains (the fracture and the adjacent matrix blocks) the flow is governed by Richards' equation. The submodels are coupled by physical transmission conditions expressing the continuity of the normal fluxes and of the pressures. We start by analyzing the case of a fracture having a fixed width-length ratio, called $\varepsilon > 0$. Then we take the limit $\varepsilon \to 0$ and give a rigorous proof for the convergence towards effective models. This is done in different regimes, depending on how the ratio of porosities and permeabilities in the fracture, respectively matrix scale with respect to $\varepsilon$, and leads to a variety of effective models. Numerical simulations confirm the theoretical upscaling results.
description: 34 pages
On the cardinality of unique range sets with weight one
Creators: name: Chakraborty, Bikash
name: Chakraborty, Sagar
Publisher: name: arXiv
Year: 2018
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30D35

description: Two meromorphic functions $f$ and $g$ are said to share the set $S\subset \mathbb{C}\cup\{\infty\}$ with weight $l\in\mathbb{N}\cup\{0\}\cup\{\infty\}$, if $E_{f}(S,l)=E_{g}(S,l)$ where $$E_{f}(S,l)=\bigcup\limits_{a \in S}\{(z,t) \in \mathbb{C}\times\mathbb{N}~ |~ f(z)=a ~\text{with~ multiplicity}~ p\},$$ where $t=p$ if $p\leq l$ and $t=p+1$ if $p>l$.
 In this paper, we improve and supplement the result of L. W. Liao and C. C. Yang (On the cardinality of the unique range sets for meromorphic and entire functions, Indian J. Pure appl. Math., 31 (2000), no. 4, 431-440) by showing that there exist a finite set $S$ with cardinality $\geq 13$ such that $E_{f}(S,1)=E_{g}(S,1)$ implies $f\equiv g$.
description: 10 pages. arXiv admin note: text overlap with arXiv:1711.08808, arXiv:1608.02125
Tumor screening and biology in malignant melanomas
Creators: name: Diaz-Cano, Salvador J.
name: L Pozo-Garcia
Publisher: name: figshare
Year: 2012
Subjects: Medicine
Cell Biology
Cancer

description: An Arch Dermatol article and editorial that emphasize the increasing incidence of thin malignant melanomas (MMs).1 - 2  Similar results have been reported in different institutions,2  and that is certainly our experience as well. The analysis of those data highlights interrelated aspects of public health (screening) and tumor biology that are considered in the attached paper.
CLASSROOM FACTORS THAT IMPACT STUDENT NEGATIVE DISPOSITIONSTOWARD MATHEMATICS: CONSIDERATIONS FOR EQUITY
Creators: name: Coria, Natalie
Publisher: name: Zenodo
Year: 2022
Subjects: literature review
education
technology
mathematics
equity

description: As we move forward in time, technology is advancing, giving educators the chance to improve the way math is taught and to provide students with all the resources they need. Although technology can help with equitability, math proficiency is still lacking in pre-and post-secondary schools. Hence, rather than solely focusing on technology, one must consider educators’, parents’, and students’ negative mathematical dispositions: it is vital to switch these negative mathematical dispositions to productive dispositions. In this literature review, I begin by defining and emphasizing productive disposition. Then, I investigate the effects of some of the “roots” of secondary school students’ negative mathematical dispositions. These “roots” are divided into three categories, all of which result from the history of math education and/or the continuing use of traditional teaching approaches. The varying research papers and case studies reveal the result and causes of these negative dispositions. Lastly, I explore equitable teaching approaches (i.e. student-centered approaches and some teacher-centered approaches) that potentially support productive disposition and vice versa, in hopes of shifting traditional teaching approaches to student-centered approaches.
УЗОҚ МУДДАТЛИ АКТИВЛАР ҲИСОБИНИ ХАЛҚАРО СТАНДАРТЛАР АСОСИДА ТАКОМИЛЛАШТИРИШ
Creators: name: Хакимов, Фахритдин
Publisher: name: Zenodo
Year: 2024

description: Ушбу мақолада узоқ муддатли активларни халқаро стандартлар асосида ҳисобини юритиш борасида хорижий ва маҳаллий олимларнинг ёндашувлари, шунингдек, халқаро стандартларда узоқ муддатли активларни тан олиш, баҳолаш ва ҳисобга олиш тамойиллари тадқиқ қилинди.
On n-tuple principal bundles
Creators: name: Grabowska, Katarzyna
name: Grabowski, Janusz
Publisher: name: arXiv
Year: 2018
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: (primary) 22A22, 58H05, 57R22, (secondary) 18D05, 18B40

description: We develop the concept of a double (more generally n-tuple) principal bundle departing from a compatibility condition for a principal action of a Lie group on a groupoid.
description: 16 pages
Machine learning and serving of discrete field theories -- when artificial intelligence meets the discrete universe
Creators: name: Qin, Hong
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (cs.LG)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: A method for machine learning and serving of discrete field theories in physics is developed. The learning algorithm trains a discrete field theory from a set of observational data on a spacetime lattice, and the serving algorithm uses the learned discrete field theory to predict new observations of the field for new boundary and initial conditions. The approach to learn discrete field theories overcomes the difficulties associated with learning continuous theories by artificial intelligence. The serving algorithm of discrete field theories belongs to the family of structure-preserving geometric algorithms, which have been proven to be superior to the conventional algorithms based on discretization of differential equations. The effectiveness of the method and algorithms developed is demonstrated using the examples of nonlinear oscillations and the Kepler problem. In particular, the learning algorithm learns a discrete field theory from a set of data of planetary orbits similar to what Kepler inherited from Tycho Brahe in 1601, and the serving algorithm correctly predicts other planetary orbits, including parabolic and hyperbolic escaping orbits, of the solar system without learning or knowing Newton's laws of motion and universal gravitation. The proposed algorithms are also applicable when effects of special relativity and general relativity are important. The illustrated advantages of discrete field theories relative to continuous theories in terms of machine learning compatibility are consistent with Bostrom's simulation hypothesis.
description: 25 pages, 12 figures
Cell proliferation in skin tumors with ductal differentiation: patterns and diagnostic applications
Creators: name: Diaz-Cano, Salvador J.
name: L Pozo-Garcia
name: F Camacho
name: J J Rios-Martin
Publisher: name: figshare
Year: 2012
Subjects: Medicine
Cell Biology
Cancer

description: The kinetic features of skin tumors with ductal differentiation (TDD) remain mainly unknown. We selected 88 skin TDD (D-PAS-positive cuticles) classified according to Murphy and Elder's criteria. Tumors studied included 13 poromas, 12 nodular hidradenomas, 10 cylindromas, 6 spiradenomas, 9 syringomas, 9 chondroid syringomas, 7 porocarcinomas, 15 malignant nodular hidradenomas, and 7 not otherwise specified carcinomas. The same tumor areas were evaluated for mitotic figure counting (MFC) and proliferation rate (PR = MIB-1 index), screening 10 consecutive high-power fields (HPFs) in the most cellular areas. Results were recorded by HPF and tumor cellularity, considering both average and standard deviation. Differences were analyzed by Student's t-test and analysis of variance (ANOVA) and considered significant if p
Roman pewter dishes from Shingham
Creators: name: Mottram, A S
Publisher: name: Archaeology Data Service
Year: 2020

description: Norfolk Archaeology, 35 (1), 19-24
description: Of four dishes of late Roman date ploughed up in 1968, two correspond to Peal's type 4d(i) and one each to types 4 and 4(i). The decoration of the smallest bowl (type 4d) consists of three elements, a beaded rim decoration, twelve beasts in relief in the field of the rim, and two cartouches. The cartouches and beasts, all clumsily made and positioned on the bowl, may be sea-creatures inspired by certain Romano-British mosaics or their copy-book archetypes; and they were possibly pre-cast individually and set in prepared beds on the dishes. A T
Excavations at North Elmham, 1969: an interim report
Creators: name: Wade-Martins, Peter
Publisher: name: Archaeology Data Service
Year: 2020

description: Norfolk Archaeology, 35 (1), 25-78
description: TF 987214. A preliminary survey of the documentary material is provided and a pre-enclosure parish map has shown some useful details. Excavated Middle to Late Saxon structures of 7th-12th centuries, illustrated by period plans, include an early group of large halls built to ambitious scales, and a boat-shaped house of 11th century. Discussion of the post-in-trench system of construction indicates its apparent evolution into the close-studding used in medieval framed structures. Work on the timber-lined ?9th century well is summarised, including technical details of its re-excavation. A tentative outline is provided for the entire history of the cathedral area. A selective catalogue of finds includes items of silver, lead, bronze, iron, bone, amber, and pottery of Ipswich, local and Thetford-type wares. Twenty-five buildings have been excavated so far, and two more seasons are planned (1970, 1971).
Galaxy clustering measurements out to redshift z$\sim$8 from Hubble Legacy Fields
Creators: name: Dalmasso, Nicolò
name: Trenti, Michele
name: Leethochawalit, Nicha
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a novel approach for measuring the two-point correlation function of galaxies in narrow pencil beam surveys with varying depths. Our methodology is utilized to expand high-redshift galaxy clustering investigations up to $z \sim 8$ by analyzing a comprehensive sample consisting of $N_g = 160$ Lyman break galaxy candidates obtained through optical and near-infrared photometric data within the CANDELS GOODS datasets from the Hubble Space Telescope Legacy Fields. For bright sources with $M_{UV} < -19.8$, we determine a galaxy bias of $b = 9.33\pm4.90$ at $\overline{z} = 7.7$ and a correlation length of $r_0 = 10.74\pm7.06$ $h^{-1}Mpc$. We obtain similar results for the XDF, with a galaxy bias measurement of $b = 8.26\pm3.41$ at the same redshift for a slightly fainter sample with a median luminosity of $M_{UV} = -18.4$. By comparing with dark-matter halo bias and employing abundance matching, we deduce a characteristic halo mass of $M_h \sim 10^{11.5} M_{\odot}$ and a duty cycle close to unity. To validate our approach for variable-depth datasets, we replicate the analysis in a region with near-uniform depth using a standard two-point correlation function estimator, yielding consistent outcomes. Our study not only provides a valuable tool for future utilization in JWST datasets but also suggests that the clustering of early galaxies continues to increase with redshift beyond $z \gtrsim 8$, potentially contributing to the existence of protocluster structures observed in early JWST imaging and spectroscopic surveys at $z \gtrsim 8$.
Logical Differencing in Dyadic Network Formation Models with Nontransferable Utilities
Creators: name: Gao, Wayne Yuan
name: Li, Ming
name: Xu, Sheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: This paper considers a semiparametric model of dyadic network formation under nontransferable utilities (NTU). NTU arises frequently in real-world social interactions that require bilateral consent, but by its nature induces additive non-separability. We show how unobserved individual heterogeneity in our model can be canceled out without additive separability, using a novel method we call logical differencing. The key idea is to construct events involving the intersection of two mutually exclusive restrictions on the unobserved heterogeneity, based on multivariate monotonicity. We provide a consistent estimator and analyze its performance via simulation, and apply our method to the Nyakatoke risk-sharing networks.
Bone marrow metastases in breast cancer
Creators: name: Diaz-Cano, Salvador J.
Publisher: name: figshare
Year: 2012
Subjects: Medicine
Cancer

description: In their study of the histochemical detection of metastases from breast cancer to bone marrow, Braun et al. (Feb. 24 issue)1 found that multivariate analysis identified the presence of cytokeratin-positive cells in the bone marrow as an independent predictor of survival. What do the authors think about the use of flow cytometry after cytokeratin staining? Their results clearly demonstrate that the presence of cytokeratin-positive cells in the bone marrow of patients with breast carcinoma is associated with shorter survival. However, because cytokeratin-positive cells were detected in control patients with nonmalignant disease and stage I tumors had fewer than 5 cytokeratin-positive cells per 2×106 bone marrow cells, the authors should also clarify the threshold of positivity needed to avoid false positive results. Braun et al. found a median of 3 cytokeratin-positive cells per 2×106 bone marrow cells, but the exclusion of patients with fewer than 3 cytokeratin-positive cells per 2×106 bone marrow cells would not be enough, because the confidence interval for each stage is not mentioned.
Atomic layer deposition on porous powders with in situ gravimetric monitoring in a modular fixed bed reactor setup
Creators: name: Strempel, Verena E.
name: Naumann D’Alnoncourt, Raoul
name: Drieß, Matthias
name: Rosowski, Frank
Publisher: name: Technische Universität Berlin
Year: 2017
Subjects: subject: 660 Chemische Verfahrenstechnik
subject: atomic layer deposition
subject: ALD
subject: synthesis
subject: coating
subject: fixed bed reactor
subject: metal oxide

description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Review of Scientific Instruments 88, 074102 (2017) and may be found at https://doi.org/10.1063/1.4992023.
description: A modular setup for Atomic Layer Deposition (ALD) on high-surface powder substrates in fixed bed reactors with a gravimetric in situ monitoring was developed. The design and operation are described in detail. An integrated magnetically suspended balance records mass changes during ALD. The highly versatile setup consists of three modular main units: a dosing unit, a reactor unit, and a downstream unit. The reactor unit includes the balance, a large fixed bed reactor, and a quartz crystal microbalance. The dosing unit is equipped with a complex manifold to deliver gases and gaseous reagents including three different ALD precursors, five oxidizing or reducing agents, and two purge gas lines. The system employs reactor temperatures and pressures in the range of 25-600 °C and 10−3 to 1 bar, respectively. Typically, powder batches between 100 mg and 50 g can be coated. The capabilities of the setup are demonstrated by coating mesoporous SiO2 powder with a thin AlOx (submono) layer using three cycles with trimethylaluminium and H2O. The self-limiting nature of the deposition has been verified with the in situ gravimetric monitoring and full saturation curves are presented. The process parameters were used for a scale-up in a large fixed bed reactor. The samples were analyzed with established analytics such as X-ray diffraction, N2 adsorption, transmission electron microscopy, and inductively coupled plasma optical emission spectrometry.
Baby boomers and their shopping behaviors: the decision processto purchase all product through social media
Creators: name: Thanyalak Sumananusorn
Publisher: name: Faculty of Management Science Nakhon Pathom Rajabhat University
Year: 2019
Subjects: elderly
Baby Boomer
Social Network
e-Payment

description: Journal of Management Science Nakhon Pathom Rajabhat University, 6, 2, 175-188
Transitive nilpotent Lie algebras of vector fields and their Tanaka prolongations
Creators: name: Grabowska, Katarzyna
name: Grabowski, Janusz
name: Ravanpak, Zohreh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: (primary) 17B30, 17B66 (secondary) 57R25, 57S20

description: Transitive local Lie algebras of vector fields can be easily constructed from dilations of $\mathbb{R}^n$ associating with coordinates positive weights (give me a sequence of $n$ positive integers and I will give you a transitive nilpotent Lie algebra of vector fields on $\mathbb{R}^n$). It is interesting that all transitive nilpotent local Lie algebra of vector fields can be obtained as subalgebras of nilpotent algebras of this kind. Starting with a graded nilpotent Lie algebra one constructs graded parts of its Tanaka prolongations inductively as `derivations of degree 0, 1, etc. Of course, vector fields of weight $k$ with respect to the dilation define automatically derivations of weight $k$, so the Tanaka prolongation is in this case never finite. Are they all such derivations given by vector fields or there are additional `strange'ones? We answer this question. Except for special cases, derivations of degree 0 are given by vector fields of degree 0 and the Tanaka prolongation recovers the whole algebra of polynomial vectors defined by the dilation. However, in some particular cases of dilations we can find `strange' derivations which we describe in detail
description: 11 pages. The title has been corrected
title: Ethiopian Journals of Environment and Development, Vol. 3 No. 1 (2020): THE ROLE OF PARTICIPATORY FOREST MANAGEMENT IN SUSTAINING RURAL LIVELIHOOD AND FOREST CONDITIONS IN SHEKO FOREST, SOUTHWESTERN ETHIOPIA
title: THE ROLE OF PARTICIPATORY FOREST MANAGEMENT IN SUSTAINING RURAL LIVELIHOOD AND FOREST CONDITIONS IN SHEKO FOREST, SOUTHWESTERN ETHIOPIA
titleType: AlternativeTitle
Creators: name: Ethiopian Journals Of Environment And Development
Publisher: name: Ethiopian Journals of Environment and Development
Year: 2021

description: Abstract Different arrangements of decentralized forest management highlighting the inclusion of communities have been promoted to halt deforestation and environmental degradation. The participatory Forest Management (PFM) scheme was introduced as an alternative tool to enhance sustainable forest management through community participation during the early 1990s. This study was conducted in the Sheko forest to examine the role of PFM on the livelihoods of rural community and forest conditions. Forest inventory and socioeconomic surveys were conducted to collect data through involving 95 households and 27 sample plots. The data were analyzed by descriptive and inferential statistical tools.
Isochronous bifurcations in a two-parameter twist map
Creators: name: Mugnaine, Michele
name: Leal, Bruno B.
name: de Almeida, Alfredo M. Ozorio
name: Viana, Ricardo L.
name: Caldas, Iberê L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Isochronous islands in phase space emerge in twist Hamiltonian systems as a response to multiple resonant perturbations. According to the Poincaré-Birkhoff theorem, the number of islands depends on the system characteristics and the perturbation. We analyze, for the two-parameter standard map, also called two-harmonic standard map, how the island chains are modified as the perturbation amplitude increases. We identified three routes for the transition from one chain, associated with one harmonic, to the chain associated with the other harmonic, based on a combination of pitchfork and saddle-node bifurcations. These routes can present intermediate island chains configurations. Otherwise, the destruction of the islands always occurs through the pitchfork bifurcation.
An ant colony optimisation algorithm for the 2D and 3D hydrophobic polar protein folding problem
Creators: name: Shmygelska, Alena
name: Hoos, Holger H
Publisher: name: BioMed Central
Year: 2016

description: Background: The protein folding problem is a fundamental problems in computational molecular biology and biochemical physics. Various optimisation methods have been applied to formulations of the ab-initio folding problem that are based on reduced models of protein structure, including Monte Carlo methods, Evolutionary Algorithms, Tabu Search and hybrid approaches. In our work, we have introduced an ant colony optimisation (ACO) algorithm to address the non-deterministic polynomial-time hard (NP-hard) combinatorial problem of predicting a protein's conformation from its amino acid sequence under a widely studied, conceptually simple model – the 2-dimensional (2D) and 3-dimensional (3D) hydrophobic-polar (HP) model. Results: We present an improvement of our previous ACO algorithm for the 2D HP model and its extension to the 3D HP model. We show that this new algorithm, dubbed ACO-HPPFP-3, performs better than previous state-of-the-art algorithms on sequences whose native conformations do not contain structural nuclei (parts of the native fold that predominantly consist of local interactions) at the ends, but rather in the middle of the sequence, and that it generally finds a more diverse set of native conformations. Conclusions: The application of ACO to this bioinformatics problem compares favourably with specialised, state-of-the-art methods for the 2D and 3D HP protein folding problem; our empirical results indicate that our rather simple ACO algorithm scales worse with sequence length but usually finds a more diverse ensemble of native states. Therefore the development of ACO algorithms for more complex and realistic models of protein structure holds significant promise.
Clonality Studies in the Analysis of Adrenal Medullary Proliferations: Application Principles and Limitations
Creators: name: Diaz-Cano, Salvador J.
Publisher: name: figshare
Year: 2012
Subjects: subject: Molecular Biology
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Cell Biology
subject: Cancer

description: Clonality remains as the hallmark of neoplasms. A dual genetic approach using markers nonrelated (e.g., X-chromosome inactivation assays) and related to the malignant transformation (such as loss of heterozygosity analyses of tumor-suppressor genes) would provide useful clonality information from early and advanced tumor stages, respectively. Tumor progression and clonal selection would result in genetic instability and heterogeneous expression of those molecular markers related to the malignant pathway. Therefore, only the coexistence of multiple genetic abnormalities would support the clonal nature as an expression of convergent cell selection. Considering those facts, the currently available evidence on tumorigenesis and clonality in the adrenal medulla can be summarized as follows: 1. Multistep tumorigenesis defines the evolution of pheochromocytomas, as evidenced by the presence of several genetic alterations. 2. Both the significant association of nonrandom genetic alterations (specially 1p and 22q interstitial deletions) and the topographic accumulation of genetic deletions at the peripheral tumor compartment support a convergent clone selection for these neoplasms. 3. Although many genetic loci show nonrandom abnormalities, the most frequently involved locates on chromosome 1p regardless of genetic tumor background (sporadic or inherited predisposition). 4. Most pheochromocytomas should begin as monoclonal proliferations that do not always correlate with histopathologic features, particularly in inherited tumor syndromes. 5. Early histopathologic stages, described as adrenal medullary hyperplasias, are defined by hyperproliferative features in animal models and monoclonal patterns in the adrenal nodules from patients with MEN-2a.
The Development of Information System for Management in the Five Precepts Keeping Village Project at Nakhon Pathom Province
Creators: name: Kairung Hengpraprohm
Publisher: name: Faculty of Management Science Nakhon Pathom Rajabhat University
Year: 2019
Subjects: information system
database
web application
the Five Precepts Keeping Village Project

description: Journal of Management Science Nakhon Pathom Rajabhat University, 6, 2, 189-202
Self-Supervised Generative Models for Crystal Structures
Creators: name: Liu, Fangze
name: Chen, Zhantao
name: Liu, Tianyi
name: Song, Ruyi
name: Lin, Yu
name: Turner, Joshua J.
name: Jia, Chunjing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Drawing inspiration from the achievements of natural language processing, we adopt self-supervised learning and utilize an equivariant graph neural network to develop a unified platform designed for training generative models capable of generating crystal structures, as well as efficiently adapting to downstream tasks in material property prediction. To mitigate the challenge of incorporating large-scale assessment on the reliability of generated structures into the training process, we utilize the generative adversarial network (GAN) with its discriminator being a cost-effective evaluator for the generated structures, resulting in notable improvements in model performance. We demonstrate the utility of our model in finding the optimal crystal structure under predefined conditions. Without reliance on properties acquired experimentally or numerically, our model further displays its capability to comprehend the mechanism of crystal structure formation through its ability to grouping chemically similar elements. Therefore, this paper extends an invitation to explore deeper into the scientific understanding of material structures through generative models, offering a fresh perspective on broadening the scope and efficacy of machine learning in material science.
Identification of functional SNPs in the 5-prime flanking sequences of human genes
Creators: name: Mottagui-Tabar, Salim
name: Faghihi, Mohammad A.
name: Mizuno, Yosuke
name: Engström, Pär G.
name: Lenhard, Boris
name: Wasserman, Wyeth W.
name: Wahlestedt, Claes
Publisher: name: BioMed Central
Year: 2016

description: Background: Over 4 million single nucleotide polymorphisms (SNPs) are currently reported to exist within the human genome. Only a small fraction of these SNPs alter gene function or expression, and therefore might be associated with a cell phenotype. These functional SNPs are consequently important in understanding human health. Information related to functional SNPs in candidate disease genes is critical for cost effective genetic association studies, which attempt to understand the genetics of complex diseases like diabetes, Alzheimer's, etc. Robust methods for the identification of functional SNPs are therefore crucial. We report one such experimental approach. Results: Sequence conserved between mouse and human genomes, within 5 kilobases of the 5-prime end of 176 GPCR genes, were screened for SNPs. Sequences flanking these SNPs were scored for transcription factor binding sites. Allelic pairs resulting in a significant score difference were predicted to influence the binding of transcription factors (TFs). Ten such SNPs were selected for mobility shift assays (EMSA), resulting in 7 of them exhibiting a reproducible shift. The full-length promoter regions with 4 of the 7 SNPs were cloned in a Luciferase based plasmid reporter system. Two out of the 4 SNPs exhibited differential promoter activity in several human cell lines. Conclusions: We propose a method for effective selection of functional, regulatory SNPs that are located in evolutionary conserved 5-prime flanking regions (5'-FR) regions of human genes and influence the activity of the transcriptional regulatory region. Some SNPs behave differently in different cell types.
A "Magnetic" Machine Learning Interatomic Potential for Nickel
Creators: name: Gong, Xiaoguo
name: Li, Zhuoyuan
name: Pattamatta, A. S. L. Subrahmanyam
name: Wen, Tongqi
name: Srolovitz, David J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nickel (Ni) is a magnetic transition metal with two allotropic phases, stable face-centered cubic (FCC) and metastable hexagonal close-packed (HCP), widely used in structural applications. Magnetism affects many mechanical and defect properties, but spin-polarized density functional theory (DFT) calculations are computationally inefficient for studying material behavior requiring large system sizes and/or long simulation times. Here we develop a "magnetism-hidden" machine-learning Deep Potential (DP) model for Ni without a descriptor for magnetic moments, using training datasets derived from spin-polarized DFT calculations. The "magnetism-hidden" DP-Ni model exhibits high transferability and representability for a wide-range of FCC and HCP properties, including (finite-temperature) lattice parameters, elastic constants, phonon spectra, and many defects. As an example of its applicability, we investigate the Ni FCC-HCP allotropic phase transition under (high-stress) uniaxial tensile loading. The DP model for magnetic Ni facilitates accurate large-scale atomistic simulations for complex mechanical behavior and serves as a foundation for developing interatomic potentials for Ni-based superalloys and other multi-principal component alloys.
Performance and aging studies for the ALICE muon RPCs
Creators: name: Quaglia, Luca
name: Bianchi, Antonio
name: Ferretti, Alessandro
name: Gagliardi, Martino
name: Stocco, Diego
name: Guida, Roberto
name: Mandelli, Beatrice
name: Alvigini, Laura
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The ALICE muon trigger (MTR) system consists of 72 Resistive Plate Chamber (RPC) detectors arranged in two stations, each composed of two planes with 18 RPCs per plane. The detectors are operated in maxi-avalanche mode using a mixture of 89.7% C$_2$H$_2$F$_4$, 10% i-C$_4$H$_{10}$ and 0.3% SF$_6$. A number of detector performance indicators, such as efficiency and dark current, have been monitored over time throughout the LHC Run2 (2015-18). While the efficiency showed very good stability, a steady increase in the absorbed dark current was observed.
 Since the end of 2018, the LHC has entered a phase of long shutdown, during which the ALICE experiment will be upgraded to cope with the next phase of data taking, expected in 2021. The MTR is undergoing a major upgrade of the front-end and readout electronics, and will change its functionalities, becoming a Muon Identifier. Only the replacement of the most irradiated RPCs is planned during the upgrade. It is therefore important to perform dedicated studies to gain further insights into the status of the detector. In particular, two RPCs were flushed with pure Ar gas for a prolonged period of time and a plasma was created by fully ionizing the gas. The output gas was analyzed using a Gas Chromatograph combined with a Mass Spectrometer and the possible presence of fluorinated compounds originating from the interaction of the plasma with the inner surfaces of the detector has been assessed using an Ion-Selective Electrode station.
 This contribution will include a detailed review of the ALICE muon RPC performance at the LHC. The procedure and results of the argon plasma test, described above, are also discussed.
description: Proceedings of the 15th Workshop on Resistive Plate Chambers and Related Detectors (RPC2020), 10-14 February 2020, University of Roma Tor Vergata, Italy
Doubly-Charged $T_{cc}^{++}$ States in the Dynamical Diquark Model
Creators: name: Mutuk, Halil
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: One of the celebrated tools in explaining the Hydrogen atom is Born-Oppenheimer approximation. The resemblance of $QQ\bar{q}\bar{q}$ tetraquarks to Hydrogen atom within Quantum chromodynamics (QCD) implies usage of Born-Oppenheimer approximation for these multiquark states. In this work, we use dynamical diquark model to calculate mass spectra and sizes of doubly charmed and charged tetraquark states denoted as $T_{cc}^{++}$. Our results for mass spectra indicate some bound state candidates with respect to corresponding two-meson thresholds. Calculation of expectation values of $\sqrt{\langle r^2 \rangle}$ reflects that doubly charmed and charged tetraquark states are compact.
description: 8 pages, 6 tables, references added, numerical results revised, main conclusions unchanged, matches the accepted version of PRD
Information geometry on groupoids: the case of singular metrics
Creators: name: Grabowska, Katarzyna
name: Grabowski, Janusz
name: Kus, Marek
name: Marmo, Giuseppe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We use the general setting for contrast (potential) functions in statistical and information geometry provided by Lie groupoids and Lie algebroids. The contrast functions are defined on Lie groupoids and give rise to two-forms and three-forms on the corresponding Lie algebroid. We study the case when the two-form is degenerate and show how in sufficiently regular cases one reduces it to a pseudometric structures. Transversal Levi-Civita connections for Riemannian foliations are generalized to the Lie groupoid/Lie algebroid case.
description: 15 pages
Steven Wedema: "Ethiek" und Macht. Die niederländisch-indische Kolonialverwaltung und indonesische Emanzipationsbestrebungen 1901 - 1927
Creators: name: Ploog, Andreas
Publisher: name: ASIEN: The German Journal on Contemporary Asia
Year: 2021

description: ASIEN: The German Journal on Contemporary Asia, Nr. 72 (1999): ASIEN (Juli)
Selection of reference genes for gene expression studies in human neutrophils by real-time PCR
Creators: name: Zhang, Xiaozhu
name: Ding, Lily
name: Sandford, Andrew J
Publisher: name: BioMed Central
Year: 2015

description: Background: Reference genes, which are often referred to housekeeping genes, are frequently used to normalize mRNA levels between different samples. However the expression level of these genes may vary among tissues or cells, and may change under certain circumstances. Thus the selection of reference gene(s) is critical for gene expression studies. For this purpose, 10 commonly used housekeeping genes were investigated in isolated human neutrophils. Results Initial screening of the expression pattern demonstrated that 3 of the 10 genes were expressed at very low levels in neutrophils and were excluded from further analysis. The range of expression stability of the other 7 genes was (from most stable to least stable): GNB2L1 (Guanine nucleotide binding protein, beta polypeptide 2-like 1), HPRT1 (Hypoxanthine phosphoribosyl transferase 1), RPL32 (ribosomal protein L32), ACTB (beta-actin), B2M (beta-2-microglobulin), GAPD (glyceraldehyde-3-phosphate dehydrogenase) and TBP (TATA-binding protein). Relative expression levels of the genes (from high to low) were: B2M, ACTB, GAPD, RPL32, GNB2L1, TBP, and HPRT1. Conclusion Our data suggest that GNB2L1, HPRT1, RPL32, ACTB, and B2M may be suitable reference genes in gene expression studies of neutrophils.
GESTATIONAL DIABETES: CAUSES, SYMPTOMS AND MANAGEMENT
Creators: name: Khasanova, Dilafruz
Publisher: name: Zenodo
Year: 2024

description: The early management of gestational diabetes is an opportunity to prevent these adverse outcomes. The Australian Carbohydrate Intolerance Study in Pregnant Women (ACHOIS) was influential in providing evidence that treatment of gestational diabetes according to standard care (at that time) reduced the risk of adverse outcomes to that of women without gestational diabetes. The treatment of gestational diabetes has since progressed with changes to criteria and a move towards a more evidence-based approach, including the development of an Australasian clinical practice guideline. Despite this, controversies exist regarding the diagnosis and management of gestational diabetes. An international, multi-centre randomized controlled trial called the Treatment of Booking Gestational Diabetes Mellitus study is currently underway and aims to provide an answer to these controversies.