cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
String excitations of a hole in a quantum antiferromagnet and photoelectron spectrospopy
Creators: name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The aim of the present paper is twofold. The first goal is to show that high resolution angle-resolved photoelectron spectra from cuprates indicate the presence of string-like excitations of the quasihole excitation in a quantum antiferromagnet. In order to compare with the experimental intensity plots, we calculate the spectral function of the t-J and the t-t'-t"-J models within the self-consistent Born approximation for widely accepted values of the parameters of these models. The main features of the high resolution photoelectron spectra are in general agreement with the results based on the above models and can be understood by considering not only the lowest energy quasiparticle peak but, also, the higher energy string-like excitations of the hole. The second goal of the present paper is to make the case that a proper analysis of both the numerical results obtained from these models and of the experimental results, suggests a theoretical picture for the internal structure of the hole-quasiparticle and a string-exchange pairing mechanism due to strong antiferromagnetic correlations among the background spins. We find that, using a simple model in which the Hilbert space is restricted to states of only unbroken strings attached to the holes and in which the holes are connected with unbroken strings, we can provide a good quantitative description of the most accurate numerical results. We find that the holes experience an effective interaction due to a string-exchange mechanism which is characterized by a rather large string tension and this can provide pairing energy scales much larger that those suggested by spin-fluctuation mediated pairing models. In addition, it is argued that such string-exchange interaction tends to bind holes in a bound state with the $d_{x^2-y^2}$ symmetry.
description: 10 two-column pages, 12 figures
Enhanced convection in mini channel with CNT fins
Creators: name: Sunil, Arjun Kozhikkatil
name: Kumar, Rakesh
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: mini-channels
nanofluid
nanotube fin
pressure drop
thermal performance

description: Songklanakarin Journal of Science and Technology, 41, 3, 612-618
Μέτρα δικονομικού καταναγκασμού και ιδίως η προσωρινή κράτηση
Creators: name: Παπαναστασίου, Αλεξάνδρα Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μέτρα δικονομικού καταναγκασμού
Προσωρινή κράτηση
Επιβολή και διάρκεια μέτρων
Procedural compulsory measures
Provisional detention
Enforcement and duration of the measures

description: Στην παρούσα εργασία αναλύονται οι προυποθέσεις επιβολής των μέτρων δικονομικού καταναγκασμού και ιδίως της προσωρινής κράτησης, οι τρόποι άμυνας του κατηγορουμένου και η διάρκεια των μέτρων δικονομικού καταναγκασμού, παρατίθενται δε και παραδείγματα από τη νομολογία των ελληνικών δικαστηρίων. Η ελληνική ποινική δικαιοσύνη φαίνεται να έχει μια μονομερή προτίμηση υπέρ της δραστικής αντεγκληματικής πολιτικής και σε βάρος των φιλελεύθερων ρυθμίσεων, με άλλα λόγια υπέρ του εξαιρετικού μέτρου της προσωρινής κράτησης και σε βάρος των περιοριστικών όρων, υπό την πίεση συχνά της κοινής γνώμης. Η σκληρή εμπειρία της προφυλάκισης κληροδότησε μια κεκτημένη προαντίληψη για υιοθέτηση αφηρημένων κριτηρίων, τα οποία σε συνδυασμό με τη βαρύτητα της πράξης καθορίζουν σε μεγάλο βαθμό την επιβολή της προσωρινής κράτησης, δίχως να εκπληρώνεται η ανάγκη για ειδική και εμπεριστατωμένη αιτιολογία της δικαστικής κρίσης, μολονότι η αιτιολογία, ως απόρροια της δημοκρατικής αρχής, αποτελεί κορυφαία εγγύηση για την προστασία των θεμελιωδών δικαιωμάτων του κατηγορουμένου, εξασφαλίζοντας το σεβασμό στην αξία του ανθρώπου και το απαραβίαστο της προσωπικής ελευθερίας
description: The purpose of this research is to identify prerequisites enforcement of procedural coercion measures and in particular the temporary detention, the advocacy strategies and approaches of the defendants and the duration of procedural coercive measures also are listed examples from the case-law of Greek courts. The Greek criminal justice seems to have a unilateral preference for active policy against crime and against liberal arrangements, in other words in favour of the exceptional measure of temporary custody and against restrictive conditions, often under pressure of public opinion. The harsh experience of detention bequeathed a vested prejudice for the adoption of abstract criteria, which in combination with the severity of the act to a large extent determine the imposition of provisional detention, without fulfilled the need for specific and detailed justification of the judicial judgment, although the justification as a result of the democratic principle, constitutes a crucial warranty for the protection of fundamental rights of the accused, ensuring respect for the value of human beings and the inviolability of personal freedom
Estimation of carbon offset for teak plantation in lower northern Thailand
Creators: name: Issarapap Kongmeesup
name: Jaruntorn Boonyanuphap
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: carbon offset
carbon stock
carbon sequestration
voluntary carbon market
teak plantation

description: Songklanakarin Journal of Science and Technology, 41, 3, 580-586
A simple model of ship wakes
Creators: name: Khan, Raza S.
Publisher: name: University of British Columbia
Year: 2009

description: While ocean waves were among the first natural phenomenon to be modeled satisfactorily in computer graphics, waves from ships—ship wakes—have been largely ignored. The model presented in this thesis is suitable for animating wakes created by a ship moving along an arbitrary course. Instead of the dynamic solution of a free-surface problem that can be computationally expensive and unstable, the approach presented is kinematic and while ad hoc, is efficient and simple to implement. The model superimposes circular waves emanating from points along the ship's path to determine the wake profile. In doing so, characteristics of the ship's hull are ignored. The approach is similar to the mathematical treatment of Kelvin's method of stationary phase, where curves of constant phase are obtained by integrating point impulses over the ship's course. Accuracy in obtaining an exact profile for the surface, as determined by the stationary phase method for closed-form solutions, is sacrificed for the ability to specify an arbitrary path. The problem then becomes one of generating circles with a height field associated with them. This is done by adopting two different methods; one that uses a midpoint circle algorithm based on Bresenham's incremental circle generator and another that efficiently determines a profile for the circles. The path of the ship is represented by parametric piecewise-cubic curves and the water surface by a height field. An animation is obtained by generating the height field for successive positions of the ship along the curve.
Flotation of sylvinite from Thakhek, Lao, P.D.R.
Creators: name: Chairoj Rattanakawin
name: Woraruethai Lakantha
name: Ittirit Kajai
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: cationic flotation
chemical and operating factors
potash
sylvinite

description: Songklanakarin Journal of Science and Technology, 41, 3, 545-550
Linguistic-Mathematical Statistics in Rebus, Lyrics, Juridical Texts, Fancies and Paradoxes
Creators: name: Smarandache, Florentin
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 46N60, 97A20

description: This is a collection of linguistic-mathematical approaches to Romanian rebus, puzzles, poetical and juridical texts, and proposes fancies, recreational math problems, and paradoxes. We study the frequencies of letters, syllables, vowels in various poetry, grill definitions in rebus, and rebus rules. We also compare the scientific language, poetical language, and puzzle language, and compute the Shannon entropy and Onicescu informational energy.
description: 44 pages, many figures. Partially presented at "The Eugene Strens Memorial on Intuitive and Recreational Mathematics and its History", University of Calgary, Alberta, Canada, July 27 - August 2, 1986
Super-Soft CP Violation
Creators: name: Valenti, Alessandro
name: Vecchi, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Solutions of the Strong CP Problem based on the spontaneous breaking of CP must feature a non-generic structure and simultaneously explain a coincidence between a priori unrelated CP-even and CP-odd mass scales. We show that these properties can emerge from gauge invariance and a CP-conserving, but otherwise generic, physics at the Planck scale. In our scenarios no fundamental scalar is introduced beyond the Standard Model Higgs doublet, and CP is broken at naturally small scales by a confining non-abelian dynamics. This approach is remarkably predictive: robustness against uncontrollable UV corrections to the QCD topological angle requires one or more families of vector-like quarks below a few $10$'s of TeV, hence potentially accessible at colliders. Because CP violation is communicated to the SM at these super-soft scales, our solution of the Strong CP Problem is not spoiled by the presence of heavy new states motivated by other puzzles in physics beyond the Standard Model. In addition, these models generically predict a dark sector that may lead to interesting cosmological signatures.
description: 19 pages. v2: matches the published version
Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle
Creators: name: Thadani, K. V.
name: Finocchio, G.
name: Li, Z. -P.
name: Ozatay, O.
name: Sankey, J. C.
name: Krivorotov, I. N.
name: Cui, Y. -T.
name: Buhrman, R. A.
name: Ralph, D. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We measure the microwave signals produced by spin-torque-driven magnetization dynamics in patterned magnetic multilayer devices at room temperature, as a function of the angle of a magnetic field applied in the sample plane. We find strong variations in the frequency linewidth of the signals, with a decrease by more than a factor of 20 as the field is rotated from the magnetic easy axis to the in-plane hard axis. Based on micromagnetic simulations, we identify these variations as due to a transition from spatially incoherent to coherent precession.
description: 15 pages, 5 figures
Επιχειρηματική Ευφυΐα και Διαχείριση
Creators: name: Καραγιαννακίδου, Δήμητρα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Επιχειρηματική Ευφυΐα
Διαχείριση Εφοδιαστικής Αλυσίδας
Πρόβλεψη ζήτησης
Business Intelligence
Supply Chain Management
Demand Forecasting

description: Το σύγχρονο επιχειρηματικό περιβάλλον διέπεται από γρήγορες αλλαγές και έντονο ανταγωνισμό, οι απαιτήσεις των πελατών ολοένα αυξάνονται και οι επιχειρήσεις καλούνται να καλύψουν τις ανάγκες τους πριν ακόμη το ζητήσουν, επομένως οι επιχειρήσεις για να επιβιώσουν και να εξελιχθούν θα πρέπει να είναι ευέλικτες και να προσαρμόζονται σε όλες τις αλλαγές. Τα τελευταία χρόνια οι επιχειρήσεις έχουν συνειδητοποιήσει ότι η ευελιξία τους εξαρτάται από τον βαθμό αποτελεσματικότητας της Εφοδιαστικής τους Αλυσίδας. Οι Εφοδιαστικές Αλυσίδες είναι περίπλοκα συστήματα που απαιτούν την γρήγορη ροή πληροφοριών, στα σωστά άτομα, την σωστή στιγμή. Καθοριστικό ρόλο για τη Διαχείριση της Εφοδιαστικής Αλυσίδας διαδραματίζει η σωστή και ακριβής πρόβλεψη της ζήτησης των πελατών, ώστε να μην υπάρχουν αστοχίες και να ληφθούν έγκαιρα οι σωστές αποφάσεις. Η Επιχειρηματική Ευφυΐα διαθέτει εργαλεία που βοηθούν την επιχείρηση να αναλύει και να κατανοεί τις προτιμήσεις και τις επιθυμίες των πελατών της, καθώς και να πραγματοποιεί ακριβέστερες προβλέψεις, ώστε να οδηγείται στην λήψη σωστών αποφάσεων και έτσι να έχει μια ευέλικτη και αποτελεσματική Εφοδιαστική Αλυσίδα. Στόχος της παρούσας εργασίας είναι η κατανόηση της συμβολής των εργαλείων που προσφέρει η Επιχειρηματική Ευφυΐα στην αποτελεσματική Διαχείριση της Εφοδιαστικής Αλυσίδας
description: The modern business environment is governed by rapid change and intense competition, customer demands ever increasing and businesses are invited to meet their needs even before the request, so the companies to survive and grow should be flexible and adapt to all changes. In recent years, companies have realized that their flexibility depends on the degree of efficiency of the Supply Chain. The Supply chains are complex systems that require the rapid flow of information to the right people at the right time. Determining role in the Supply Chain Management plays the correct and accurate prediction of customer demand, that there are no failures and take timely the right decisions. The Business Intelligence features tools that help the company to analyze and understand the tastes and desires of its customers, and to make more accurate predictions to be moved into the right decisions and thus have a flexible and efficient supply chain. The purpose of this study is to understand the contribution of the tools offered by Business Intelligence in effective Supply Chain Management
OSS PESTO: An Open Source Software Project Evaluation and Selection TOol
Creators: name: Li, Xiaozhou
name: Moreschini, Sergio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Open source software (OSS), playing an increasingly critical role nowadays, has been commonly adopted and integrated in various software products. For many practitioners, selecting and adopting suitable OSS can help them greatly. Though many studies have been conducted on proposing OSS evaluation and selection models, a limited number are followed and used in the industry. Meanwhile, many existing OSS evaluation tools, though providing valuable details, fall short on offering intuitive suggestions in terms of framework-supported evaluation factors. Towards filling the gap, we propose an Open Source Software Project Evaluation and Selection TOol (OSS PESTO). Targeting OSS on Github, the largest OSS source code host, it facilitates the evaluation practice by enabling practitioners to compare candidates therein in terms of selected OSS evaluation models. It also allows in-time Github data collection and customized evaluation that enriches its effectiveness and ease of use.
description: 8 pages, 3 figures
Stability Conditions and Branes at Singularities
Creators: name: Bergman, Aaron
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: I use Bridgeland's definition of a stability condition on a triangulated category to investigate the stability of D-branes on Calabi-Yau cones given by the canonical line bundle over a del Pezzo surface. In this context, I prove the existence of the decay of a D3-brane into a set of fractional branes. This is an important aspect of the derivation of quiver gauge theories from branes at singularities via the technique of equivalences of categories. Some important technical aspects of this equivalence are discussed. I also prove that the representations corresponding to skyscraper sheaves supported off the zero section are simple.
description: 22 pages, uses utarticle.cls, dcpic.sty, v2: published version
A Spitzer Survey for Dust-Obscured Supernovae
Creators: name: Fox, Ori D.
name: Khandrika, Harish
name: Rubin, David
name: Casper, Chadwick
name: Li, Gary Z.
name: Szalai, Tamas
name: Armus, Lee
name: Filippenko, Alexei V.
name: Skrutskie, Michael F.
name: Strolger, Lou
name: Van Dyk, Schuyler D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Supernova (SN) rates serve as an important probe of star-formation models and initial mass functions. Near-infrared seeing-limited ground-based surveys typically discover a factor of 3-10 fewer SNe than predicted from far-infrared (FIR) luminosities owing to sensitivity limitations arising from both a variable point-spread function (PSF) and high dust extinction in the nuclear regions of star-forming galaxies. This inconsistency has potential implications for our understanding of star-formation rates and massive-star evolution, particularly at higher redshifts, where star-forming galaxies are more common. To resolve this inconsistency, a successful SN survey in the local universe must be conducted at longer wavelengths and with a space-based telescope, which has a stable PSF to reduce the necessity for any subtraction algorithms and thus residuals. Here we report on a two-year Spitzer/IRAC 3.6 um survey for dust-extinguished SNe in the nuclear regions of forty luminous infrared galaxies (LIRGs) within 200 Mpc. The asymmetric Spitzer PSF results in worse than expected subtraction residuals when implementing standard template subtraction. Forward-modeling techniques improve our sensitivity by ~1.5 magnitudes. We report the detection of 9 SNe, five of which were not discovered by optical surveys. After adjusting our predicted rates to account for the sensitivity of our survey, we find that the number of detections is consistent with the models. While this search is nonetheless hampered by a difficult-to-model PSF and the relatively poor resolution of Spitzer, it will benefit from future missions, such as Roman Space Telescope and JWST, with higher resolution and more symmetric PSFs.
description: Accepted to MNRAS. 12 pages, 12 figures, 3 tables (With Final Edits)
Memory reclamation in Emerald: an object-oriented programming language
Creators: name: Han, Xiaomei
Publisher: name: University of British Columbia
Year: 2009

description: Storage management is an important part of a programming system. There are two basic storage management techniques: explicit storage management and automatic storage management. This thesis investigates automatic storage management, garbage collection techniques, in the object-oriented programming language Emerald. In general, garbage collection algorithms fall into four categories, namely, reference counting, markand- sweep , copying, and generational copying based algorithms. Since these garbage collection techniques have been proposed, there has been a large amount of work done. However, the work has mainly focussed on garbage collection of functional programming languages. How well will these garbage collection techniques perform in an objectoriented programming paradigm in which the behavior is rather diiferent from that of functional programming languages? This thesis mainly aims at studying the most promising garbage collection technique — the generational garbage collection algorithm, and gathering and measuring the parameters that affect the generational garbage collection. We use both simulation and measurement of an actual implementation to compare the performance of several alternating garbage collection techniques in Emerald.
Contributing to the global commons: Repositories and Wikimedia
Creators: name: Sheppard, Nick
Publisher: name: Zenodo
Year: 2019
Subjects: Wikimedia, Wikipedia, Wikidata, Wikimedia Commons, repositories. Research Data, RDMEngage, RDM

description: There is huge potential for universities and their libraries to leverage Wikimedia in order to expose research outputs and collections. Wikimedia comprises sixteen projects in total, including Wikipedia, Wikimedia Commons and Wikidata. At the University of Leeds, the Research Data Management Service have successfully run a project that focuses on linking research data with the Wikimedia suite of tools via a series of ‘editathons’, in order to increase the visibility of research data and enable reuse on Wikipedia and elsewhere. The project - "Manage it locally to share it globally: RDM and Wikimedia Commons" - was the winning submission to a competition launched in May 2018 and sponsored by SPARC Europe, Jisc and the University of Cambridge, called the "Data Management Engagement Award", which aimed to address cultural challenges involved in promoting effective research data practices.

 The project has served as a springboard to further explore Wikimedia strategically, both at the University of Leeds and across the White Rose Consortium. For example we are collaborating on a new project looking at Wikipedia citations of research from York, Sheffield and Leeds, and the proportion of these that are open access. The long term goal might be to establish a "Wikimedian in Residence" across the consortium. In this talk, we will present the project's outputs - including a toolkit that will enable other institutions to apply the same methodology. In addition we will explore the potential of Wikidata to link up repositories and other data silos in a manner that enables reuse and increases impact.
Bragg Coherent Imaging of nanoprecipitates: role of superstructure reflections
Creators: name: Dupraz, Maxime
name: Leake, Steven J.
name: Richard, Marie-Ingrid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Coherent precipitation of ordered phases is responsible for providing exceptional high temperature mechanical properties in a wide range of compositionally complex alloys (CCAs). Ordered phases are also essential to enhance the magnetic or catalytic properties of alloyed nanoparticles. The present work aims at demonstrating the relevance of Bragg coherent diffraction imaging (BCDI) to study bulk and thin film samples or isolated nanoparticles containing coherent nanoprecipitates / ordered phases. Crystals of a few tens of nanometres are modelled with realistic interatomic potentials and relaxed after introduction of coherent ordered nanoprecipitates. Diffraction patterns from fundamental and superstructure reflections are calculated in the kinematic approximation and used as input to retrieve the strain fields using algorithmic inversion. We first tackle the case of single nanoprecipitates and show that the strain field distribution from the ordered phase is retrieved very accurately. Then, we investigate the influence of the order parameter S on the strain field retrieved from the superstructure reflections and evidence that a very accurate strain distribution can be retrieved for partially ordered phases with large and inhomogeneous strains. In a subsequent section, we evaluate the relevance of BCDI for the study of systems containing many precipitates and demonstrate that the technique is relevant for such systems. Finally, we discuss the experimental feasibility of using BCDI to image ordered phases, in the light of the new possibilities offered by the 4 th generation synchrotron sources.
description: 33 pages, 12 figures
Probing gluon number density with electron-dijet correlations at EIC
Creators: name: van Hameren, Andreas
name: Kotko, Piotr
name: Kutak, Krzysztof
name: Sapeta, Sebastian
name: Żarów, Elżbieta
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose a novel way of studying the gluon number density (the so-called Weizsäcker-Williams gluon distribution) using the planned Electron Ion Collider. Namely, with the help of the azimuthal correlations between the total transverse momentum of the dijet system and the scattered electron, we examine an interplay between the effect of the soft gluon emissions (the Sudakov form factor) and the gluon saturation effects. The kinematic cuts are chosen such that the dijet system is produced in the forward direction in the laboratory frame, which provides an upper bound on the probed longitudinal fractions of the hadron momentum carried by scattered gluons. Further cuts enable us to use the factorization formalism that directly involves the unpolarized Weizsäcker-Williams gluon distribution. We find this observable to be very sensitive to the soft gluon emission and moderately sensitive to the gluon saturation.
description: 7 pages, 5 figures. References added
Genetic variation in Mineus group of Mycalesis (Nymphalidae: Satyrinae) in peninsular Thailand: Inferred from mitochondrial and nuclear genes
Creators: name: Sakiyah Morlor
name: Nantasak Pinkaew
name: Singtoe Boonrotpong
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: Mycalesis
genetic differentiation
haplotype network
peninsular Thailand
phylogeny

description: Songklanakarin Journal of Science and Technology, 41, 3, 631-640
Hardgrove grindability index and approximate work index of sodium feldspar
Creators: name: Chairoj Rattanakawin
name: Aung Lay Tin
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: approximate work index
Hardgrove grindability index
sodium feldspar

description: Songklanakarin Journal of Science and Technology, 41, 3, 664-668
Notes on Collective Field Theory of Matrix and Spin Calogero Models
Creators: name: Aniceto, Inês
name: Jevicki, Antal
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Matrix models and related Spin-Calogero-Sutherland models are of major relevance in a variety of subjects, ranging from condensed matter physics to QCD and low dimensional string theory. They are characterized by integrability and exact solvability. Their continuum, field theoretic representations are likewise of definite interest. In this paper we describe various continuum, field theoretic representations of these models based on bosonization and collective field theory techniques. We compare various known representations and describe some nontrivial applications.
description: 36 pages, no figures v2: references added, a version to appear in the special issue of JPhysA (edited by G Dunne, J Feinberg and P Dorey) v3:comments changed, paper identical to v2
Lactic acid production from alkaline hydrothermal reaction of cassava starch
Creators: name: Soklin Kuy
name: Siwarutt Boonyarattanakalin
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: cassava starch
lactic acid
alkaline hydrothermal reaction
microwave radiation
biomass

description: Songklanakarin Journal of Science and Technology, 41, 3, 506-512
Lean techniques and simulation-based optimization for improving wood plastic composite manufacturing
Creators: name: Busaba Phruksaphanrat
name: Suttirak Duangburong
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: lean techniques
case study
computer simulation
productivity improvement
optimization

description: Songklanakarin Journal of Science and Technology, 41, 3, 559-566
Gravitational lensing effects on the gamma-ray burst Hubble diagram
Creators: name: Oguri, Masamune
name: Takahashi, Keitaro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma-Ray Bursts (GRBs) offer a potential way to extend the Hubble diagram to very high redshifts and to constrain the nature of dark energy in a way complementary to distant type Ia supernovae. However, gravitational lensing systematically brightens distant GRBs through the magnification bias, in addition to increasing the dispersions of distance measurements. We investigate how the magnification bias limits the cosmological usage of GRBs. We perform Monte-Carlo simulations of Swift GRBs assuming a cosmological constant dominated universe and then constrain the dark energy equation of state neglecting gravitational lens effects. The originally assumed model is recovered with 68% confidence limit even when the dispersion of inferred luminosities is comparable to that of type Ia supernovae. This implies that the bias is not so drastic for Swift GRBs as to change constraints on dark energy and its evolution. However, the precise degree of the bias in cosmological parameter determinations depends strongly on the shape of the luminosity function of GRBs. Therefore, an accurate determination of the shape of the luminosity function is required to remove the effect of gravitational lensing and to obtain an unbiased Hubble diagram.
description: 5 pages, 3 figures, accepted for publication in Phys. Rev. D. Quantitative results were changed because of using a new luminosity function of GRBs
Mangiferin content in different parts of mango tree (Mangifera indica L.) in Thailand
Creators: name: Ngampuk Tayana
name: Wichayasith Inthakusol
name: Nongnaphat Duangdee
name: Chewchinda, Savita
name: Hataichanok Pandith
name: Sumet Kongkiatpaiboon
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: Mangifera indica
mangiferin
xanthones
HPLC
standardization
quantitative analysis

description: Songklanakarin Journal of Science and Technology, 41, 3, 522-528
Microstructural alteration and oxidation behavior of boronized stainless steel AISI 440C after heat treatments
Creators: name: Patcharin Naemchanthara
name: Patiphan Juijerm
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: oxidation resistance
thermochemical surface treatment
heat treatment
martensitic stainless steel
boronizing

description: Songklanakarin Journal of Science and Technology, 41, 3, 539-544
Quantum depletion of collapsing Bose-Einstein condensates
Creators: name: Wuester, S.
name: Dabrowska-Wuester, B. J.
name: Bradley, A. S.
name: Davis, M. J.
name: Blakie, P. B.
name: Hope, J. J.
name: Savage, C. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We perform the first numerical three-dimensional studies of quantum field effects in the Bosenova experiment on collapsing condensates by E. Donley et al. [Nature 415, 39 (2002)] using the exact experimental geometry. In a stochastic truncated Wigner simulation of the collapse, the collapse times are larger than the experimentally measured values. We find that a finite temperature initial state leads to an increased creation rate of uncondensed atoms, but not to a reduction of the collapse time. A comparison of the time-dependent Hartree-Fock-Bogoliubov and Wigner methods for the more tractable spherical trap shows excellent agreement between the uncondensed populations. We conclude that the discrepancy between the experimental and theoretical values of the collapse time cannot be explained by Gaussian quantum fluctuations or finite temperature effects.
description: 9 pages, 4 figures, replaced with published version
title: Information on social value orientation and cooperation in public goods games
Creators: name: Chai, Yidan
Publisher: name: University of Kent
Year: 2022

description: In the present thesis, we report the design and results of three experiments. These experiments focused on the impact of information of social value orientation (SVO) in public goods game on cooperative behavior in public goods game. To provide a theoretical underpinning to the work we apply belief-based guilt aversion and reciprocity models from psychological game theory. These allow us to derive testable hypotheses on the role of information on contributions.
Quantum $κ$-deformations of D=4 relativistic supersymmetries
Creators: name: Lukierski, Jerzy
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe the quantum $κ$-deformation of super-Poincaré algebra, with fundamental mass-like deformation parameter $κ$. We shall describe the result in graded bicrossproduct basis, with classical Lorentz superalgebra sector which includes half of the supercharges.
description: LaTeX 4 pages, aipproc style - included. To appear in Proc. of 14th Int. Conf. on Supersymmetry and Unification of Fundamental Interactions (SUSY'06), UC Irvine, California, June 2006; Ed. J. Feng, AIP Proc. Ser. (2007)
Η Αμερικάνικη Εξωτερική Πολιτική και η Αντιμετώπιση της Διασποράς των Πυρηνικών Όπλων μετά τον Ψυχρό Πόλεμο
Creators: name: Μυρίσκος, Αριστείδης Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Συνθήκη Μη Διασποράς των Πυρηνικών Όπλων
Αποπυρηνικοποίηση
Πυρηνικό Πρόγραμμα
Non-Proliferation Treaty
Denuclearization
Nuclear Program

description: Η συνθήκη NPT δημιουργήθηκε με στόχο την αποτροπή των κρατών από την απόκτηση πυρηνικών όπλων και το καθεστώς επαλήθευσης που θέτει η συνθήκη είναι ικανοποιητικό. Ωστόσο το περιεχόμενο της συνθήκης δεν μπορεί να αντιμετωπίσει την περίπτωση κατά την οποία ένα κράτος ήδη κατέχει πυρηνικά όπλα ή διαθέτει τα μέσα και αποφασίσει να αποκτήσει πυρηνικό οπλοστάσιο. Η εργασία αυτή εξετάζει την πολιτική που εφάρμοσαν οι Η.Π.Α. (διπλωματία, κυρώσεις και συνεργασία) σε 8 χώρες (Καζακστάν, Ουκρανία, Νότια Αφρική, Ινδία, Πακιστάν, Ιράν, Ισραήλ και Βόρεια Κορέα) οι οποίες αποτελούν χαρακτηριστικά παραδείγματα της παραπάνω αδυναμίας της συνθήκης NPT. Εξετάζεται επίσης η συνεργασία της Αμερικής με την Ρωσία η οποία ήταν αρκετά σημαντική για την αποπυρηνικοποίηση των 2 πρώτων χωρών και μέχρι σήμερα είναι εξίσου σημαντική για την αντιμετώπιση της διασποράς. Τέλος σε αυτήν την εργασία αναλύεται η πολιτική που εφάρμοσε η Αμερική στην περίπτωση της Κίνας, ένα κράτος που, όπως και το Ιράν, αν και είναι μέλος της NPT, ανά διαστήματα έχει δημιουργήσει προβλήματα στο ζήτημα της διασποράς των πυρηνικών. Oι μόνες περιπτώσεις στις οποίες η αντιμετώπιση της διασποράς έγινε εφικτή ήταν η αποπυρηνικοποίηση του Καζακστάν, της Ουκρανίας και της Νότιας Αφρικής. Το συμπέρασμα στο οποίο καταλήγει αυτή η εργασία είναι ότι η Αμερική δεν συνέβαλε αποτελεσματικά στις προκλήσεις που δημιουργήθηκαν στις υπόλοιπες χώρες επειδή συνδύασε την αντιμετώπιση της διασποράς των πυρηνικών όπλων με την ανάπτυξη της οικονομίας της και με ζητήματα της εξωτερικής πολιτικής της όπως η αμυντική συνεργασία και η καταπολέμηση της διεθνούς τρομοκρατίας στα οποία δόθηκε προτεραιότητα
description: The NPT per se is exclusively focused on preventing the spread of nuclear weapons; there is no provision for dealing with states that already have these weapons or cross the nuclear threshold. This theses examines the U.S. nuclear non-proliferation policy in eight case studies (Kazakstan, Ukraine, South Africa, India, Pakistan, Iran, Israel and North Korea) which are a clear example of the above weakness of this treaty. Furthermore, this theses examines the U.S.-Russia coordination which contributed to the nuclear diasarmarment in the first two cases and which was and still is very important in preventing the spread of nuclear weapons at a global level. Finaly, this theses shows how U.S. dealt with China’s proliferation problem. By assessing the U.S. nuclear non-proliferation policy this thesis first highlights in which cases U.S. contributed in strengthening the non-proliferation regime and in which cases it failed to do so and second analyses success and failure factors
Natural gonadal compartmentalizing of economical important Hemiramphus far from Thailand by visual observation and histological technique
Creators: name: Piyakorn Boonyoung
name: Sinlapachai Senarat
name: Wannee Jiraungkoorskul
name: Kettratad, Jes
name: Watiporn Yenchum
name: Pisit Poolprasert
name: Theerakamol Pengsakul
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: germ cells
Hemiramphidae
histology
reproductive system

description: Songklanakarin Journal of Science and Technology, 41, 3, 693-699
Numerical analysis of biological effects on several organs inside human body exposed to electric field from 500 kV OHTLs
Creators: name: Apichart Siriwitpreecha
name: Phadungsak Rattanadecho
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2019
Subjects: current density
organs
human body
electric field
transmission lines

description: Songklanakarin Journal of Science and Technology, 41, 3, 649-657
Multi-directed Eulerian growing networks
Creators: name: Masucci, A. P.
name: Rodgers, G. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We introduce and analyze a model of a multi-directed Eulerian network, that is a directed and weighted network where a path exists that passes through all the edges of the network once and only once. Networks of this type can be used to describe information networks such as human language or DNA chains. We are able to calculate the strength and degree distribution in this network and find that they both exhibit a power law with an exponent between 2 and 3. We then analyze the behavior of the accelerated version of the model and find that the strength distribution has a double slope power law behavior. Finally we introduce a non-Eulerian version of the model and find that the statistical topological properties remain unchanged. Our analytical results are compared with numerical simulations.
description: 6 pages, 5 figures
Synthesis of new high-entropy alloy-type Nb3 (Al, Sn, Ge, Ga, Si) superconductors
Creators: name: Yamashita, Aichi
name: Matsuda, Tatsuma D.
name: Mizuguchi, Yoshikazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Studies on high-entropy alloy (HEA) superconductors have recently been increasing, particularly in the fields of materials science and condensed matter physics. To contribute to research on new HEA-type superconductors, in our study we synthesized polycrystalline samples of A15-type superconductors of Nb3Al0.2Sn0.2Ge0.2Ga0.2Si0.2 (#1) and Nb3Al0.3Sn0.3Ge0.2Ga0.1Si0.1 (#2) with an HEA-type site by arc melting. Elemental and structural analyses revealed that the compositions of the obtained samples satisfied the HEA state criteria. Superconducting transitions were observed at 9.0 and 11.0 K for #1 and #2, respectively, in the temperature dependence of magnetization and electrical resistivity. Specific heat measurements revealed that the Sommerfeld coefficient, Debye temperature, and ΔC/γTc for the obtained samples were close to those reported for conventional Nb3Sn family superconductors.
description: 15 pages, 4 figures, 1 table
Ενζυμική και Μικροβιακή Αποικοδόμηση Συνθετικών Πολυμερών
Creators: name: Κυριακού, Σταυρούλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πολυαιθυλένιο
Ενζυμική αποικοδόμηση
Μικροβιακή αποικοδόμηση
Polyethylene
Enzymatic degradation
Microbial degradation

description: Το πολυαιθυλένιο είναι το υλικό που χρησιμοποιείται κατά κύριο λόγο στις συσκευασίες και θεωρείται ένα από τα πιο ανθεκτικά πλαστικά που ανήκουν στην κατηγορία των συνθετικών πολυμερών. Ο βαθμός της βιολογικής αποικοδόμησης του πολυαιθυλενίου είναι χαμηλός, ενώ παράλληλα ο μηχανισμός της αποικοδόμησής του δεν έχει αποσαφηνιστεί πλήρως. Ο σκοπός της παρούσας διπλωματικής εργασίας ήταν η μελέτη της βιολογικής αποικοδόμησης του πολυαιθυλενίου σε μορφή σκόνης χρησιμοποιώντας διαφορετικές ποσότητες της λακκάσης που παράγεται από το μύκητα Agaricus bisporus (ενζυμική αποικοδόμηση) και διαφορετικές ποσότητες βακτηριακού εναιωρήματος του μικροοργανισμού Pseudomonas putida (DSMZ 6125). Κατά την πειραματική διαδικασία, η κρυσταλλικότητα των προς αποικοδόμηση δειγμάτων, καθώς και ο δείκτης διπλού δεσμού μετρήθηκαν με βάση τη Διαφορική Θερμιδομετρία Σάρωσης (DSC) και τη Φασματοσκοπία Υπερύθρου με Μετασχηματισμό Fourier (FTIR), αντίστοιχα. Η μεγαλύτερη μείωση στο βαθμό κρυσταλλικότητας παρατηρήθηκε κατά τη μικροβιακή αποικοδόμηση, υποδεικνύοντας επαρκή αποικοδόμηση και μικροβιακή προσκόλληση στην κρυσταλλική δομή του πολυαιθυλενίου. Επιπρόσθετα, από τα αποτελέσματα της Φασματοσκοπίας Υπερύθρου με Μετασχηματισμό Fourier παρατηρήθηκε ότι ο δείκτης διπλού δεσμού (DBI) ήταν υψηλότερος για τα δείγματα πολυαιθυλενίου που αποικοδομήθηκαν με ενζυμικό τρόπο. Ωστόσο, όσον αφορά τα δείγματα μικροβιακής αποικοδόμησης δεν παρατηρήθηκαν αξιοσημείωτες αλλαγές στις τιμές του δείκτη διπλού δεσμού σε σύγκριση με τα δείγματα ενζυμικής αποικοδόμησης, υποδηλώνοντας ότι και οι δύο τρόποι βιολογικής αποικοδόμησης είναι αποτελεσματικοί
description: Polyethylene (PE) is the most widely used packaging material and considered one of the most durable plastic polymers. It is characterized by slow biodegradability and insufficient elucidation of its degradation mechanism. The aim of the study was the investigation of the biodegradability of PE powder by using different enzyme amounts of Agaricus bisporus laccase and different inoculum size values of Pseudomonas putida (DSMZ 6125). Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FTIR) were performed to measure the crystallinity of the degraded samples and double bond index, respectively. The highest decrease in the degree of crystallinity was obtained for the microbial degradation, indicating sufficient degradation and microbial attack on the crystal structure of PE. Moreover, the FTIR results verified that the DBI was higher for the enzymatically treated samples, although no significant difference was observed for the microbial treated ones, suggesting that both ways of biological degradation are effective
Quantum phase transitions mediated by clustered non-Hermitian degeneracies
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A broad family of phase transitions in the closed as well as open quantum systems is known to be mediated by a non-Hermitian degeneracy (a.k.a. exceptional point, EP) of the Hamiltonian. In the EP limit, in general, the merger of an $N-$plet of the energy eigenvalues is accompanied by a parallel (though not necessarily complete) degeneracy of eigenstates (forming an EP-asociated $K-$plet; in mathematics, $K$ is called the geometric multiplicity of the EP). In the literature, unfortunately, only the benchmark matrix models with $K=1$ can be found. In our paper the gap is filled: the EP-mediated quantum phase transitions with $K>1$ are called "clustered", and a family of benchmark models admitting such a clustering phenomenon is proposed and described. For the sake of maximal simplicity our attention is restricted to the real perturbed-harmonic-oscillator-type N by N matrix Hamiltonians which are exactly solvable and in which the perturbation is multiparametric (i.e., maximally variable) and antisymmetric (i.e., maximally non-Hermitian). A labeling (i.e., an exhaustive classification) of these models is provided by a specific partitioning of N.
description: 26 pages, supersedes unpublished arXiv:2010.15014
Universal access to electronic communications systems in Canada
Creators: name: Ehrcke, Tara R.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines policy initiatives which may improve the likelihood that electronic computer networks will be universally accessible, with respect to the production and the reception of information, to all Canadians. I begin by describing the technologies and industries which will be involved in the development of new high speed computer networks. I then examine the notion of universal access, and policies which have been applied to existing communications systems with the objective of improving access through affordability. I discuss some restrictions on content, including Canadian content requirements and carriage and content separation, and their effects on universal access. Finally, I examine some of the policy initiatives being considered by the Canadian government, and the degree to which they would protect the public interest. I conclude with alternative recommendations which I feel are more likely to succeed in ensuring universal access for Canadians.
A model of HIV budding and self-assembly, role of cell membrane
Creators: name: Zhang, Rui
name: Nguyen, Toan T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Budding from the plasma membrane of the host cell is an indispensable step in the life cycle of the Human Immunodeficiency Virus (HIV), which belongs to a large family of enveloped RNA viruses, retroviruses. Unlike regular enveloped viruses, retrovirus budding happens {\em concurrently} with the self-assembly of retrovirus protein subunits (Gags) into spherical virus capsids on the cell membrane. Led by this unique budding and assembly mechanism, we study the free energy profile of retrovirus budding, taking into account of the Gag-Gag attraction energy and the membrane elastic energy. We find that if the Gag-Gag attraction is strong, budding always proceeds to completion. During early stage of budding, the zenith angle of partial budded capsids, $α$, increases with time as $α\propto t^{1/3}$. However, when Gag-Gag attraction is weak, a metastable state of partial budding appears. The zenith angle of these partially spherical capsids is given by $α_0\simeq(τ^2/κσ)^{1/4}$ in a linear approximation, where $κ$ and $σ$ are the bending modulus and the surface tension of the membrane, and $τ$ is a line tension of the capsid proportional to the strength of Gag-Gag attraction. Numerically, we find $α_0<0.3π$ without any approximations. Using experimental parameters, we show that HIV budding and assembly always proceed to completion in normal biological conditions. On the other hand, by changing Gag-Gag interaction strength or membrane rigidity, it is relatively easy to tune it back and forth between complete budding and partial budding. Our model agrees reasonably well with experiments observing partial budding of retroviruses including HIV.