cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stringy phenomenology with preon models
Creators: name: Raitio, Risto
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compare, following Pati, global symmetries our topological supersymmetric preon model with the heterotic E_8 x E_8 string theory. We include Pati's supergravity based preon model in this work and compare the preon interactions of his model to ours. Based on preon-string symmetry comparison and preon phenomenological results we conclude that the fundamental particles are likely preons rather than standard model particles.
description: 8 pages, 1 figure
Transport across meso-junctions of highly doped Si with different superconductors
Creators: name: Parab, Pradnya
name: Bose, Sangita
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We studied the transport properties of meso-junctions of semiconducting (Sm) highly doped Si with different superconductors (Sc) through point contact Andreev reflection (PCAR) spectroscopy. Spectra of low transparency point contacts between Si and In showed an enhancement in the superconducting energy gap of In. This was due to the effect of an additional gap arising from the Schottky barrier at the Sm-Sc interface. For higher transparency Si-Nb and Si-Pb point contacts, no gap enhancement was observed though there were weak sub gap features. These were due to proximity induced interface superconductivity known to occur for Sm-Sc junctions of high transparency.
description: 25 pages, 5 figures
Η προσωπική και οικογενεική ιστορία των μαθητών/δημιουργία μιας σχολικής συλλογής: ένα πρόγραμμα ενταγμένο στην Ευέλικτη ζώνη, στο 12/θεσιο Δημοτικό Σχολείο του Νέου Ρυσίου/Δήμου Θέρμης Θεσσαλονίκης
Creators: name: Γκόκας, Βασίλειος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Προσωπική και οικογενειακή ιστορία
Ευέλικτη ζώνη
Μουσειολογία
Personal and family history
School project
Museology

description: Πρόκειται για ένα εκπαιδευτικό πρόγραμμα που εφαρμόστηκε σε δυο τμήματα(Ε΄και ΣΤ΄τάξη)του Δημοτικού Σχολείου Νέου Ρυσίου-Θεσσαλονίκης με θέμα: «Την προσωπική και οικογενειακή μνήμη και ιστορία» .Διήρκεσε έξι μήνες και ακολουθήθηκε η μέθοδος των σχεδίων εργασίας(project).Έγινε στα πλαίσια της Ευέλικτης Ζώνης και σύμφωνα με τη φιλοσοφία της διαθεματικής προσέγγισης. Στόχευε στη διερεύνηση των πολιτιστικών ιδιαιτεροτήτων των μαθητών, τη μελέτη της τοπικής Ιστορίας και τη δημιουργία «συλλογικότητας»,μέσα από τη γνωριμία και την αλληλοκατανόηση μαθητών, δασκάλων και Γονέων σε ένα νέο περιβάλλον(το σχολείο είναι νεοϊδρυόμενο και στεγάστηκε πρόσφατα σε καινούριο διδακτήριο). Στην εργασία αυτή περιγράφονται αναλυτικά όλα τα «σχέδια εργασίας». Ασχοληθήκαμε με τα ζητήματα του μουσειολογικού προγραμματισμού και σχεδιασμού. Το υλικό μας που αποτελείται από: αντικείμενα, φωτογραφίες ,γραπτά κείμενα, βιντεοσκοπημένο υλικό με προφορικές αφηγήσεις και κατασκευές των παιδιών οργανώθηκε σε θεματικές ενότητες.
description: This issue is about a school project that was implemented in two classes (5th and 6th grade) of Neo Risio Primary School of Thessaloniki, concerning the "personal and family memory and history" .It lasted for six months and it was based on the project work methodology. It was held in accordance with the philosophy of the cross curriculum thematic approach as a part of the Flexible curriculum zone. It was aimed at exploring the cultural background of students , the study of local history and the creation of "collegiality", through the better knowledge and mutual understanding of pupils, teachers and parents in a new school -environment (the school is newly established).The collected material will be the base for the creation, of an exhibition – small school museum -that will refer to the above project. In this issue we dealt with the issues of the museological planning and design as well. Our material consisting of: artifacts , photographs, written texts, video material with oral narratives and constructions of the pupils,was organized in thematic sections.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
การดูดซับตะกั่วน้ำเสียจากโรงงานน้ำตาลโดยใช้เถ้าลอยชานอ้อย
Creators: name: สิรวัลภ์ เรืองช่วย ตู้ประกาย
name: เสรีย์ ตู้ประกาย
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2551
Subjects: เถ้าลอยชานอ้อย,ตะกั๋วน้ำเสียจากโรงงาน,โรงงานน้ำตาล,การดูดซับตะกั๋ว

description: 1, 1, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
The x-dependence of hadronic parton distributions: A review on the progress of lattice QCD
Creators: name: Constantinou, Martha
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article, we review recent lattice calculations on the $x$-dependence of parton distributions, with the latter providing information on hadron structure. These calculations are based on matrix elements of boosted hadrons coupled to non-local operators and can be related to the standard, light-cone distribution functions via an appropriate factorization formalism. There is significant progress in several directions, including calculations of flavor singlet parton distribution functions (PDFs), first calculations of generalized parton distributions (GPDs), as well as the implementation of some of the approaches for the transverse-momentum-dependent PDFs (TMD PDFs). This new direction of lattice calculations is particularly interesting for phenomenological fits on experimental data sets, as the lattice results can help to improve the constraints on the distribution functions.
description: Invited article in lieu of a plenary talk at the 38th International Symposium on Lattice Field Theory (Lattice 2020). Prepared for the EPJA special issue "Lattice Field Theory during the COVID-19 pandemic". (25 pages)
Integration of Fractional Order Black-Scholes Merton with Neural Network
Creators: name: Maitra, Sarit
name: Mishra, Vivek
name: Kundu, Goutam Kr.
name: Arora, Kapil
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Finance (q-fin.CP)
subject: Complex Variables (math.CV)
subject: Applications (stat.AP)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: This study enhances option pricing by presenting unique pricing model fractional order Black-Scholes-Merton (FOBSM) which is based on the Black-Scholes-Merton (BSM) model. The main goal is to improve the precision and authenticity of option pricing, matching them more closely with the financial landscape. The approach integrates the strengths of both the BSM and neural network (NN) with complex diffusion dynamics. This study emphasizes the need to take fractional derivatives into account when analyzing financial market dynamics. Since FOBSM captures memory characteristics in sequential data, it is better at simulating real-world systems than integer-order models. Findings reveals that in complex diffusion dynamics, this hybridization approach in option pricing improves the accuracy of price predictions. the key contribution of this work lies in the development of a novel option pricing model (FOBSM) that leverages fractional calculus and neural networks to enhance accuracy in capturing complex diffusion dynamics and memory effects in financial data.
PT-symmetric Deformations of the Korteweg-de Vries Equation
Creators: name: Fring, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new family of complex PT-symmetric extensions of the Korteweg-de Vries equation. The deformed equations can be associated to a sequence of non-Hermitian Hamiltonians. The first charges related to the conservation of mass, momentum and energy are constructed. We investigate solitary wave solutions of the equation of motion for various boundary conditions.
description: 11 pages, 3 figures
Nature vs. nurture: a Bayesian framework for assessing apparent correlations between planetary orbital properties and stellar ages
Creators: name: Safsten, Emily D.
name: Dawson, Rebekah I.
name: Wolfgang, Angie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Many exoplanets have orbital characteristics quite different from those seen in our own solar system, including planets locked in orbital resonances and planets on orbits that are elliptical or highly inclined from their host star's spin axis. It is debated whether the wide variety in system architecture is primarily due to differences in formation conditions (nature) or due to evolution over time (nurture). Identifying trends between planetary and stellar properties, including stellar age, can help distinguish between these competing theories and offer insights as to how planets form and evolve. However, it can be challenging to determine whether observed trends between planetary properties and stellar age are driven by the age of the system -- pointing to evolution over time being an important factor -- or other parameters to which the age may be related, such as stellar mass or stellar temperature. The situation is complicated further by the possibilities of selection biases, small number statistics, uncertainties in stellar age, and orbital evolution timescales that are typically much shorter than the range of observed ages. Here we develop a Bayesian statistical framework to assess the robustness of such observed correlations and to determine whether they are indeed due to evolutionary processes, are more likely to reflect different formation scenarios, or are merely coincidental. We apply this framework to reported trends between stellar age and 2:1 orbital resonances, spin-orbit misalignments, and hot Jupiters' orbital eccentricities. We find strong support for the nurture hypothesis only in the final case.
description: Accepted by the Astronomical Journal
The Matrix of Maximum Out Forests of a Digraph and Its Applications
Creators: name: Agaev, Rafig
name: Chebotarev, Pavel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Data Structures and Algorithms (cs.DS)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C50; 05C05; 15A51

description: We study the maximum out forests of a (weighted) digraph and the matrix of maximum out forests. A maximum out forest of a digraph G is a spanning subgraph of G that consists of disjoint diverging trees and has the maximum possible number of arcs. If a digraph contains any out arborescences, then maximum out forests coincide with them. We provide a new proof to the Markov chain tree theorem saying that the matrix of Ces`aro limiting probabilities of an arbitrary stationary finite Markov chain coincides with the normalized matrix of maximum out forests of the weighted digraph that corresponds to the Markov chain. We discuss the applications of the matrix of maximum out forests and its transposition, the matrix of limiting accessibilities of a digraph, to the problems of preference aggregation, measuring the vertex proximity, and uncovering the structure of a digraph.
description: 27 pages, 3 figures
การใช้เทคนิค Near Infrared Spectroscopy (NIRS) ในการหาความชื้น และโปรตีนของแป้งสาลี
Creators: name: ณรงค์พันธุ์ รัตนปนัดดา
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2552
Subjects: ความชื้น,เนียร์อินฟราเรดสเปกโตรสโกปี,โปรตีน,แป้งสาลี

description: 1, 2, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
On the anisotropic distribution of clusters in the local Universe
Creators: name: Schaller, Matthieu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In his 2021 lecture to the Canadian Association of Physicists Congress, P.J.E. Peebles pointed out that the brightest extra-galactic radio sources tend to be aligned with the plane of the de Vaucouleur Local Supercluster up to redshifts of $z=0.02$ ($d_{\rm MW}\approx 85~\rm{Mpc}$). He then asked whether such an alignment of clusters is anomalous in the standard $Λ$CDM framework. In this letter, we employ an alternative, absolute orientation agnostic, measure of the anisotropy based on the inertia tensor axis ratio of these brightest sources and use a large cosmological simulation from the FLAMINGO suite to measure how common such an alignment of structures is. We find that only 3.5% of randomly selected regions display an anisotropy of their clusters more extreme than the one found in the local Universe's radio data. This sets the region around the Milky Way as a $1.85σ$ outlier. Varying the selection parameters of the objects in the catalogue, we find that the clusters in the local Universe are never more than $2σ$ away from the simulations' prediction for the same selection. We thus conclude that the reported anisotropy, whilst note-worthy, is not in tension with the $Λ$CDM paradigm.
description: 5 pages, 4 figures, Accepted for publication in MNRAS
On asymptotic stability of the Skyrmion
Creators: name: Bizoń, Piotr
name: Chmaj, Tadeusz
name: Rostworowski, Andrzej
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the asymptotic behavior of spherically symmetric solutions in the Skyrme model. We show that the relaxation to the degree-one soliton (called the Skyrmion) has a universal form of a superposition of two effects: exponentially damped oscillations (the quasinormal ringing) and a power law decay (the tail). The quasinormal ringing, which dominates the dynamics for intermediate times, is a linear resonance effect. In contrast, the polynomial tail, which becomes uncovered at late times, is shown to be a \emph{nonlinear} phenomenon.
description: 4 pages, 4 figures, minor changes to match the PRD version
การพัฒนาผลิตภัณฑ์อิฐดินเผาจังหวัดสิงห์บุรี
Creators: name: สุทัศน์ จันบัวลา
name: มานะ เอี่ยมบัว
name: พิทักษ์ เหล่ารัตนกุล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2552
Subjects: อิฐดินเผา,สิงห์บุรี

description: 1, 2, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
On mobile sets in the binary hypercube
Creators: name: Vasil'ev, Yuriy
name: Avgustinovich, Sergey
name: Krotov, Denis
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05B99; 94B25

description: If two distance-3 codes have the same neighborhood, then each of them is called a mobile set. In the (4k+3)-dimensional binary hypercube, there exists a mobile set of cardinality 2*6^k that cannot be split into mobile sets of smaller cardinalities or represented as a natural extension of a mobile set in a hypercube of smaller dimension. Keywords: mobile set; 1-perfect code.
description: 9p., in Russian (English version will be finished later)
An Adaptive All-Pass Filter for Time-Varying Delay Estimation
Creators: name: Jelfs, Beth
name: Sun, Shuai
name: Ghorbani, Kamran
name: Gilliam, Christopher
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The focus of this paper is the estimation of a delay between two signals. Such a problem is common in signal processing and particularly challenging when the delay is non-stationary in nature. Our proposed solution is based on an all-pass filter framework comprising of two elements: a time delay is equivalent to all-pass filtering and an all-pass filter can be represented in terms of a ratio of a finite impulse response (FIR) filter and its time reversal. Using these elements, we propose an adaptive filtering algorithm with an LMS style update that estimates the FIR filter coefficients and the time delay. Specifically, at each time step, the algorithm updates the filter coefficients based on a gradient descent update and then extracts an estimate of the time delay from the filter. We validate our algorithm on synthetic data demonstrating that it is both accurate and capable of tracking time-varying delays.
description: 6 pages, 5 figures, 1 table
การสร้างบทเรียนสำเร็จรูปสำหรับส่งเสริมการเรียนรู้ เรื่อง การจำแนกสิ่งมีชีวิต วิชาชีววิทยาพื้นฐาน
Creators: name: ยุธยา อยู่เย็น
name: ทิฐิมา นวลบุญ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2552
Subjects: บทเรียนสำเร็จรูป,การจำแนกสิ่งมีชีวิต,ชีววิทยาพื้นฐาน

description: 1, 2, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Η μορφή, το περιεχόμενο και η αξιολόγηση των σχολικών προγραμμάτων Περιβαλλοντικής Εκπαίδευσης στην Ελλάδα: η περίπτωση των προγραμμάτων στα σχολεία του Ν. Σερρών:
Creators: name: Σωτηροπούλου, Χριστίνα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Περιβαλλοντική Εκπαίδευση
Αξιολόγηση
Ανάληψη δράσης
Environmental Education
Assessment
Action procedures

description: Με την παρούσα έρευνα διερευνάται η σχολική πρακτική των προγραμμάτων Περιβαλλοντικής Εκπαίδευσης (Π.Ε.) στα σχολεία της Δευτεροβάθμιας Εκπαίδευσης του Ν. Σερρών. Υλικό της έρευνας αποτέλεσαν 23 σχέδια υποβολής προγράμματος Π.Ε. στη Διεύθυνση Δευτεροβάθμιας Εκπαίδευσης Ν. Σερρών το σχολικό έτος 2006-07, το τελικό προϊόν των 23 προγραμμάτων, 10 συνεντεύξεις με συμμετέχοντες εκπαιδευτικούς και το προσωπικό μου ημερολόγιο καταγραφής των συναντήσεων μου με τους εμπλεκόμενους εκπαιδευτικούς. Ως ερευνητικοί άξονες τέθηκαν το θέμα, οι άμεσα και έμμεσα εμπλεκόμενες ομάδες και φορείς, ο σχεδιασμός και η υλοποίηση των προγραμμάτων, οι μορφές και τα είδη αξιολόγησής τους, η παρουσίασή τους καθώς και το τελικό προϊόν. Οι αναλύσεις του υλικού έγιναν σε μακρο-επίπεδο με την ποιοτική ανάλυση περιεχομένου και, ειδικότερα, με τα παραδείγματα της δόμησης περιεχομένου και της πρότυπης δόμησης και ολοκληρώθηκαν με την ερμηνεία του εγγύς και άπω πλαισίου (εξήγηση). Στην ερμηνευτική αυτή προσέγγιση ενέχεται και το στοιχείο της κριτικής (κριτική ερμηνευτική, κριτική ανάλυση λόγου). Με την έρευνα διαπιστώθηκε ότι βασικές αρχές της Π.Ε. παραγνωρίζονται ή και καταστρατηγούνται, με αποτέλεσμα την επιφανειακή θεώρηση των μελετώμενων θεμάτων όπως και την απουσία κριτικής στάσης και διαδικασιών ανάληψης δράσης για την αντιμετώπιση των περιβαλλοντικών προβλημάτων.
description: The present research investigates the implementation of the Environmental Education (E.E.) Programs in secondary education schools of the Prefecture of Serres. The research was based on 23 relevant lesson plans submitted to the Directorate of Secondary Education of the Prefecture of Serres during the school year 2006-07, the final outcome of these 23 lesson plans, 10 interviews of the participant-teachers as well as my personal log on all my meetings with the teachers involved. The following were determined as research pillars: the subject, directly and indirectly involved groups and bodies, planning and implementation of programs, forms and types of their assessment, their presentation as well as their final outcome. Macro-level material analyses were held by means of qualitative content analysis and, more specificall, by means of content and model structure, while their conclusion provided an interpretation of the near-and-far framework (explanation). Such an interpretation approach also comprised the element of criticism (critical interpretation, critical discourse analysis). The investigation established that the principles of E.E. were either disregarded or even infringed, having as a result the superficial consideration of the subjects under examination, as well as the lack of any critical attitude and action procedures for the anticipation of any possible environmental problems.
Study of Photon Dominated Regions in Cepheus B
Creators: name: Mookerjea, B.
name: Kramer, C.
name: Roellig, M.
name: Masur, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aim: The aim of the paper is to understand the emission from the photon dominated regions in Cepheus B, estimate the column densities of neutral carbon in bulk of the gas in Cepheus B and to derive constraints on the factors which determine the abundance of neutral carbon relative to CO. Methods: This paper presents 15'x15' fully sampled maps of CI at 492 GHz and 12CO 4-3 observed with KOSMA at 1' resolution. The new observations have been combined with the FCRAO 12CO 1-0, IRAM-30m 13CO 2-1 and C18O 1-0 data, and far-infrared continuum data from HIRES/IRAS. The KOSMA-tau spherical PDR model has been used to understand the CI and CO emission from the PDRs in Cepheus B and to explain the observed variation of the relative abundances of both C^0 and CO. Results: The emission from the PDR associated with Cepheus B is primarily at V_LSR between -14 and -11 km s^-1. We estimate about 23% of the observed CII emission from the molecular hotspot is due to the ionized gas in the HII region. Over bulk of the material the C^0 column density does not change significantly, (2.0+-1.4)x10^17 cm^-2, although the CO column density changes by an order of magnitude. The observed \cbyco abundance ratio varies between 0.06 and 4 in Cepheus B. We find an anti-correlation of the observed C/CO abundance ratio with the observed hydrogen column density, which holds even when all previous observations providing C/CO ratios are included. Here we show that this observed variation of C/CO abundance with total column density can be explained only by clumpy PDRs consisting of an ensemble of clumps. At high H2 column densities high mass clumps, which exhibit low C/CO abundance, dominate, while at low column densities, low mass clumps with high C/CO abundance dominate.
description: 12 pages, 10 figures, Accepted for publication in A&A
การศึกษาแนวทางการปฏิบัติของโคบิต (COBIT) ในการนำโอเพนซอร์สมาใช้ในองค์กร กรณีที่ศึกษาบริษัท ไอซีที ที่จัดตั้งเพื่อบริษัทในเครือ
Creators: name: สันติพัฒน์ อรุณธารี
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2552
Subjects: ผู้ใช้ซอฟต์แวร์สงวนสิทธิ์แบบมีใบอนุญาต,ผู้ใช้ซอฟต์แวร์แบบไม่มีใบอนุญาต,ผู้ใช้ซอฟต์แวร์เสรี/โอเพ่นซอร์ส,Good Governance,การกำกับดูแลเทคโนโลยีสารสนเทศ (IT Governance),กรอบปฏิบัติโคบิต (Control Objective for Information and Related Technology)

description: 1, 2, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
QORAQALPOG'ISTON RESPUBLIKASI HUDUDIDA TARQALGAN ITLAR (CANIS LUPUS FAMILIARIS) NING ASOSIY GELMINTOZLARI VA ULARGA QARSHI KURASHISH CHORALARI
Creators: name: Safarov, Alisher
name: Kutlimuratov, Nietulla
Publisher: name: Zenodo
Year: 2024

description: ushbu maqolada Qoraqalpog‘iston Respublikasi hududida tarqalgan sut emizuvchi hayvonlar itlar haqida (canis lupus familiaris) hamda gelmintoz kasalliklari va ularga qarshi kurashish choralari haqida so‘z borgan.
Modeling Post-Reionization HI Distributions in Fuzzy Dark Matter Cosmologies Using Conditional Normalizing Flows
Creators: name: Dome, Tibor
name: Azhar, Rumail
name: Fialkov, Anastasia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Upcoming 21 cm intensity mapping experiments like the Square Kilometer Array (SKA) hold significant potential to constrain the properties of dark matter. In this work, we model neutral hydrogen (HI) distributions using high-resolution hydrodynamical $N$-body simulations of both cold dark matter (CDM) and fuzzy dark matter (FDM) cosmologies in the post-reionization redshift range of $z=3.42-4.94$. We show that the HI abundance decreases in FDM-like cosmologies. Extreme FDM models with $m\sim 10^{-22}$ eV are at odds with a range of measurements. Due to the increased halo bias, the HI bias increases, paralleled by the damped Lyman-$α$ (DLA) bias which we infer from the cross-section of DLAs. The distribution of the latter in extreme FDM models has a high median at the low-mass end, which can be traced to the high column density of cosmic filaments. FDM models exhibit a very similar abundance of DLAs compared to CDM while sub-DLAs are already less abundant. We study the prospects of detecting the brightest HI peaks with SKA1-Low at $z=4.94$, indicating moderate signal-to-noise ratios (SNR) at angular resolution $θ_A = 2^{\prime}$ with a rapidly declining SNR for lower values of $θ_{A}$. After training the conditional normalizing flow network HIGlow on 2D HI maps, we interpolate its latent space of axion masses to predict the peak flux for a new, synthetic FDM cosmology, finding good agreement with expectations. This work thus underscores the potential of normalizing flows in capturing complex, non-linear structures within HI maps, offering a versatile tool for conditional sample generation and prediction tasks.
description: 18 pages, 10 figures, 4 tables
Brash Sendromu
Creators: name: Erkman Sanrı
Publisher: name: Zenodo
Year: 2018

description: BRASH sendromunda oluşan klinik aslında kullanılan ilaçlar, hiperkalemi ve renal yetmezlik arasındaki kısır döngü ile oluşmakta (Şekil 1). Renal yetmezlik hiperkalemiye ve terapötik dozda kullanılan AV nod blokerlerinin (atenolol, nadolol vs.) akümülasyonuna sebep olmaktadır. AV nod blokerleri, hiperkalemi ile birlikte bradikardiye, hipoperfüzyona ve sonrasında şoka sebep olabilmektedir. BRASH sendromunda oluşan klinik aslında kullanılan ilaçlar, hiperkalemi ve renal yetmezlik arasındaki kısır döngü ile oluşmakta (Şekil 1). Renal yetmezlik hiperkalemiye ve terapötik dozda kullanılan AV nod blokerlerinin (atenolol, nadolol vs.) akümülasyonuna sebep olmaktadır. AV nod blokerleri, hiperkalemi ile birlikte bradikardiye, hipoperfüzyona ve sonrasında şoka sebep olabilmektedir.
การศึกษาประสิทธิภาพของสารสกัดจากพืช ในการควบคุมหนอนแมลงวันบ้าน
Creators: name: ยุวรัตน์ ปรมีศนาภรณ์
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2552
Subjects: หนอนแมลงวันบ้าน,สารสกัดจากพืช,เมล็ดสะเดาไทย,รากดาวเรืองน้อย,ใบสาบเสือ

description: 1, 2, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Influence of strain on magnetization and magnetoelectric effect in La0.7A0.3MnO3 / PMN-PT(001) (A = Sr; Ca)
Creators: name: Thiele, C.
name: Dorr, K.
name: Bilani, O.
name: Rodel, J.
name: Schultz, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the influence of a well-defined reversible biaxial strain <=0.12 % on the magnetization (M) of epitaxial ferromagnetic manganite films. M has been recorded depending on temperature, strain and magnetic field in 20 - 50 nm thick films. This is accomplished by reversibly compressing the isotropic in-plane lattice parameter of the rhombohedral piezoelectric 0.72PMN-0.28PT (001) substrates by application of an electric field E <= 12 kV cm-1. The magnitude of the total variable in-plane strain has been derived. Strain-induced shifts of the ferromagnetic Curie temperature (Tc) of up to 19 K were found in La0.7Sr0.3MnO3 (LSMO) and La0.7Ca0.3MnO3 films and are quantitatively analysed for LSMO within a cubic model. The observed large magnetoelectric coupling coefficient alpha=mu0 dM/dE <= 6 10-8 s m-1 at ambient temperature results from the strain-induced M change in the magnetic-film-ferroelectric-substrate system. It corresponds to an enhancement of mu0 DeltaM <= 19 mT upon biaxial compression of 0.1 %. The extraordinary large alpha originates from the combination of three crucial properties: (i) the strong strain dependence of M in the ferromagnetic manganites, (ii) large piezo-strain of the PMN-PT substrates and (iii) effective elastic coupling at the film-substrate interface.
description: 15 pages, 6 figures, 1 table
The postposing construction in Japanese
Creators: name: Rosen, Eric Robert
Publisher: name: University of British Columbia
Year: 2009

description: This work examines the syntactic nature of the postposing construction in Japanese, which is a construction commonly heard in casual conversation, in which a constituent of the sentence occurs to the right of the matrix verb, outside of its canonical position. This construction appears to violate a strict condition in Japanese on the linear ordering of constituents within a phrase: namely, that all constituents of a maximal projection must precede the head of the projection. The questions I seek to answer about the postposing construction are as follows: 1. Does a postposed phrase have a syntactic relationship with the rest of the sentence or is it a mere "afterthought" to the sentence. 2. Does the postposing construction obey syntactic constraints? 3. If postposed phrases are a syntactic phenomenon, are they derived by movement or by base-generation? 4. Why does the postposing construction appear to violate the "left-attaching" nature of Japanese linear precedence? The framework of my analysis is "classical" government-binding theory of the 1980's and early 1990's; I also draw on some of the approaches of the Minimalist programme of Chomsky (1995). The data I use are native-speaker judgements of postposed Japanese sentences. The main conclusions I come to about the postposing construction are as follows: 1. There are syntactic constraints on postposed phrases to the extent that we can only explain postposing as a syntactic phenomenon rather than as an afterthought: for example: (a) Postposed phrases show evidence that they are subject to subjacencylike effects. (b) Traces of postposed phrases show evidence of a head-government licensing requirement. 2. Postposed phrases show Condition C reconstruction effects which are most easily explained by movement of the postposed phrase. 3. The unique nature of postposed phrases as sole exception to the strict left-attaching nature of Japanese can be explained by the uniqueness of the position that they occur in: I post that they are right-adjoined to the root node of the sentence. Under the minimalist framework of Chomsky (1995), a position adjoined to the root node is the only position that is not in the minimal domain of a head.
การศึกษาคุณลักษณะของปุ๋ยหมักที่ได้จากกากตะกอนของระบบบำบัดน้ำเสีย และวัสดุอินทรีย์
Creators: name: ประวรดา โภชนจันทร์
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2552
Subjects: กากตะกอนจากระบบบำบัดน้ำเสีย,ธาตุอาหารพืช,ปุ๋ยหมัก

description: 1, 2, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
A multi-protocol framework for the development of collaborative virtual environments
Creators: name: Argento, Luciano
name: Furfaro, Angelo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Software Engineering (cs.SE)
subject: Computers and Society (cs.CY)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Collaborative virtual environments (CVEs) are used for collaboration and interaction of possibly many participants that may be spread over large distances. Both commercial and freely available CVEs exist today. Currently, CVEs are used already in a variety of different fields: gaming, business, education, social communication, and cooperative development. In this paper, a general framework is proposed for the development of a cooperative environment which is able to exploit a multi protocol network infrastructure. The framework offers support to concerns such as communication security and inter-protocol interoperability and let software engineers to focus on the specific business of the CVE under development. To show the framework effectiveness we consider, as a case of study, the design of a reusable software layer for the development of distributed card games built on top of it. This layer is, in turn, used for the implementation of a specific card game.
On the Branching Bias of Syntax Extracted from Pre-trained Language Models
Creators: name: Li, Huayang
name: Liu, Lemao
name: Huang, Guoping
name: Shi, Shuming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Many efforts have been devoted to extracting constituency trees from pre-trained language models, often proceeding in two stages: feature definition and parsing. However, this kind of methods may suffer from the branching bias issue, which will inflate the performances on languages with the same branch it biases to. In this work, we propose quantitatively measuring the branching bias by comparing the performance gap on a language and its reversed language, which is agnostic to both language models and extracting methods. Furthermore, we analyze the impacts of three factors on the branching bias, namely parsing algorithms, feature definitions, and language models. Experiments show that several existing works exhibit branching biases, and some implementations of these three factors can introduce the branching bias.
description: EMNLP 2020 findings
The Evolution of Plants
Creators: name: ยุธยา อยู่เย็น
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: Evolution,Plant,Homeostasis,Genetics

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Intrinsic color diversity of nearby type Ia supernovae
Creators: name: Arima, Noriaki
name: Doi, Mamoru
name: Morokuma, Tomoki
name: Takanashi, Naohiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It has been reported that the extinction law for Type Ia Supernovae (SNe Ia) may be different from the one in the Milky Way, but the intrinsic color of SNe Ia and the dust extinction are observationally mixed. In this study, we examine photometric properties of SNe Ia in the nearby universe ($z \lesssim 0.04$) to investigate the SN Ia intrinsic color and the dust extinction. We focus on the Branch spectroscopic classification of 34 SNe Ia and morphological types of host galaxies. We carefully study their distribution of peak colors on the $B-V$, $V-R$ color-color diagram, as well as the color excess and absolute magnitude deviation from the stretch-color relation of the bluest SNe Ia. We find that SNe Ia which show the reddest color occur in early-type spirals and the trend holds when divided into Branch sub-types. The dust extinction becomes close to the Milky-Way like extinction if we exclude some peculiar red Broad Line (BL) sub-type SNe Ia. Furthermore, two of these red BLs occur in elliptical galaxies, less-dusty environment, suggesting intrinsic color diversity in BL sub-type SNe Ia.
description: 25 pages, 7 figures, 3 tables. Accepted for Publications of the Astronomical Society of Japan (PASJ), December 2020
Long-range correlated random field and random anisotropy O(N) models: A functional renormalization group study
Creators: name: Fedorenko, Andrei A.
name: Kühnel, Florian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the long-distance behavior of the O(N) model in the presence of random fields and random anisotropies correlated as ~1/x^{d-sigma} for large separation x using the functional renormalization group. We compute the fixed points and analyze their regions of stability within a double epsilon=d-4 and sigma expansion. We find that the long-range disorder correlator remains analytic but generates short-range disorder whose correlator develops the usual cusp. This allows us to obtain the phase diagrams in (d,sigma,N) parameter space and compute the critical exponents to first order in epsilon and sigma. We show that the standard renormalization group methods with a finite number of couplings used in previous studies of systems with long-range correlated random fields fail to capture all critical properties. We argue that our results may be relevant to the behavior of He-3A in aerogel.
description: 8 pages, 3 figures, revtex4
Διερεύνηση εφαρμογής της συγκριτικής μέτρησης επιδόσεων στο σύστημα δημόσιων αστικών συγκοινωνιών της Θεσσαλονίκης:
Creators: name: Γεωργιάδης, Γεώργιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Δημόσιες συγκοινωνίες
Συγκριτική μέτρηση επιδόσεων
Θεσσαλονίκη
Public transport
Benchmarking
Thessaloniki

description: Η συγκριτική μέτρηση επιδόσεων (benchmarking) θεωρείται μία από τις πιο υποσχόμενες πρακτικές διατήρησης και βελτίωσης της ποιότητας και αποδοτικότητας των δημόσιων συγκοινωνιών μέσω της ανταλλαγής ορθών πρακτικών με άλλους φορείς. Η παρούσα διπλωματική εργασία ασχολείται με την διερεύνηση εφαρμογής του ‘benchmarking’ στο σύστημα δημόσιων αστικών συγκοινωνιών της Θεσσαλονίκης. Πρώτα, αναλύεται η διαδικασία ανάπτυξης ενός συστήματος μέτρησης επιδόσεων και θίγονται ζητήματα που αφορούν στην συλλογή δεδομένων και στην επιλογή των απαραίτητων δεικτών αξιολόγησης. Στη συνέχεια, περιγράφεται η μεθοδολογία της συγκριτικής μέτρησης επιδόσεων και αναφέρονται επιτυχημένα παραδείγματα δικτύων benchmarking. Στην περίπτωση της Θεσσαλονίκης, προσδιορίζονται οι προτεραιότητες του συστήματος και έπειτα επιλέγονται παρόμοια συστήματα δημόσιων συγκοινωνιών με στόχο την πραγματοποίηση των απαραίτητων συγκρίσεων. Η ανεπάρκεια των δεδομένων δεν επέτρεψε την ολοκλήρωση της μεθόδου, αλλά, τα σημεία που απαιτούν βελτίωση και οι περιοχές πιθανής συνεργασίας μπόρεσαν να εντοπιστούν. Στο τελευταίο κεφάλαιο η εργασία ολοκληρώνεται με προτάσεις για την πραγματοποίηση της μεθόδου στην πράξη και την παρουσίαση των ωφελειών από την εφαρμογή της.
description: Benchmarking is considered as one of the most promising ways to help maintain and improve the quality and efficiency of public transportation sector by the sharing data on good practices among operators. This thesis concentrates on the practice of ‘benchmarking’ e.g. the measurement of indicators for an individual operator and ‘a comparison of results’ with other operators, by applying this technique to the public transportation system in Thessaloniki, Greece. First, the process of developing a performance measurement system for public transportation operators and the complications of data collection and selection of the appropriate indicators are discussed. After that, the methodology of the benchmark process is described and successful benchmarking networks are presented. In the case of Thessaloniki, Greece the priorities and goals of the local public transportation system are defined and then similar cities from other European countries are selected for comparison. Although the lack of available data did not allow the completion of benchmarking process, the areas where improvement is needed and the fields of potential cooperation among them were revealed. In the final chapter, the thesis concludes with advice on how the local transportation system can start a benchmarking process and explain the potential benefits from the application of this technique.
Singularity confinement for maps with the Laurent property
Creators: name: Hone, A. N. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The singularity confinement test is very useful for isolating integrable cases of discrete-time dynamical systems, but it does not provide a sufficient criterion for integrability. Quite recently a new property of the bilinear equations appearing in discrete soliton theory has been noticed: the iterates of such equations are Laurent polynomials in the initial data. A large class of non-integrable mappings of the plane are presented which both possess this Laurent property and have confined singularities.
description: 13 pages; typos corrected; comments & references added; reformulation of theorem
Self-similar potentials in quantum mechanics and coherent states
Creators: name: Spiridonov, V. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A brief description of the relations between the factorization method in quantum mechanics, self-similar potentials, integrable systems and the theory of special functions is given. New coherent states of the harmonic oscillator related to the Fourier transformation are constructed.
description: 29 pages
Reconstruction of Cluster Masses using Particle Based Lensing I: Application to Weak Lensing
Creators: name: Deb, Sanghamitra
name: Goldberg, David M.
name: Ramdass, Vede J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Particle-Based Lensing (PBL), a new technique for gravitational lensing mass reconstructions of galaxy clusters. Traditionally, most methods have employed either a finite inversion or gridding to turn observational lensed galaxy ellipticities into an estimate of the surface mass density of a galaxy cluster. We approach the problem from a different perspective, motivated by the success of multi-scale analysis in smoothed particle hydrodynamics. In PBL, we treat each of the lensed galaxies as a particle and then reconstruct the potential by smoothing over a local kernel with variable smoothing scale. In this way, we can tune a reconstruction to produce constant signal-noise throughout, and maximally exploit regions of high information density. PBL is designed to include all lensing observables, including multiple image positions and fluxes from strong lensing, as well as weak lensing signals including shear and flexion. In this paper, however, we describe a shear-only reconstruction, and apply the method to several test cases, including simulated lensing clusters, as well as the well-studied ``Bullet Cluster'' (1E0657-56). In the former cases, we show that PBL is better able to identify cusps and substructures than are grid-based reconstructions, and in the latter case, we show that PBL is able to identify substructure in the Bullet Cluster without even exploiting strong lensing measurements. We also make our codes publicly available.
description: Accepted for publication in ApJ; Codes available at http://www.physics.drexel.edu/~deb/PBL.htm ; 12 pages,9 figures, section 3 shortened
Torsion at different scales: from materials to the Universe
Creators: name: Mavromatos, Nick E.
name: Pais, Pablo
name: Iorio, Alfredo
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The concept of torsion in geometry, although known for a long time, has not gained considerable attention by the physics community until relatively recently, due to its diverse and potentially important applications to a plethora of contexts of physical interest. These range from novel materials, such as graphene and graphene-like materials, to advanced theoretical ideas, such as string theory and supersymmetry/supergravity and applications thereof in understanding the dark sector of our Universe. This work reviews such applications of torsion at different physical scales.
description: 48 pages, 9 figures incorporated. Invited review, the version matches the published version in the journal Universe
Super-resolution and denoising of fluid flow using physics-informed convolutional neural networks without high-resolution labels
Creators: name: Gao, Han
name: Sun, Luning
name: Wang, Jian-Xun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: High-resolution (HR) information of fluid flows, although preferable, is usually less accessible due to limited computational or experimental resources. In many cases, fluid data are generally sparse, incomplete, and possibly noisy. How to enhance spatial resolution and decrease the noise level of flow data is essential and practically useful. Deep learning (DL) techniques have been demonstrated to be effective for super-resolution (SR) tasks, which, however, primarily rely on sufficient HR labels for training. In this work, we present a novel physics-informed DL-based SR solution using convolutional neural networks (CNN), which is able to produce HR flow fields from low-resolution (LR) inputs in high-dimensional parameter space. By leveraging the conservation laws and boundary conditions of fluid flows, the CNN-SR model is trained without any HR labels. Moreover, the proposed CNN-SR solution unifies the forward SR and inverse data assimilation for the scenarios where the physics is partially known, e.g., unknown boundary conditions. Several flow SR problems relevant to cardiovascular applications have been studied to demonstrate the proposed method's effectiveness and merit. Both Gaussian and non-Gaussian MRI noises are investigated to illustrate the denoising capability.
description: 34 pages, 11 figures
Resonating bipolarons
Creators: name: Ranninger, J.
name: Romano, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Electrons coupled to local lattice deformations end up in selftrapped localized molecular states involving their binding into bipolarons when the coupling is stronger than a certain critical value. Below that value they exist as essentially itinerant electrons. We propose that the abrupt crossover between the two regimes can be described by resonant pairing similar to the Feshbach resonance in binary atomic collision processes. Given the intrinsically local nature of the exchange of pairs of itinerant electrons and localized bipolarons, we demonstrate the occurrence of such a resonance on a finite-size cluster made out of metallic atoms surrounding a polaronic ligand center.
description: 7 pages, 4 figures, to be published in Europhysics Letters