cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evolutionary job scheduling with optimized population by deep reinforcement learning
Creators: name: Zeng, Detian
name: Zhan, Jun
name: Peng, Wei
name: Zeng, Zengri
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Computational Biology

description: The sorting operation of the production line in a heavy industrial scenario has the double complexity of the problem and the data. To improve production efficiency, the operation needs to be optimized. Aimed at this problem, this article designs a data representation method and an evolutionary job scheduling algorithm with an optimized population by deep reinforcement learning (DRL). Moreover, a real industrial dataset is contributed. The representation method represents the job data by referring to the bag-of-words model. The evolutionary algorithm uses DRL to initialize the genetic algorithm (GA)'s population and further evolves the population through the GA to obtain the final scheduling result. The experimental results indicate that the evolutionary algorithm has achieved the largest decrease in the average times for frame clearing on the real and simulated validation datasets, which are 12.54% and 11.43%, respectively. It is of great significance for subsequent scheduling of the full-scenario digital twin.
Airline Alliances: Evolution, Typologies and Comparative Efficiency Analysis
Creators: name: Κώττας, Άγγελος Θεοχάρη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Συμμαχίες Αεροπορικών Εταιρειών
Τυπολογίες Συμμαχιών Αεροπορικών Εταιρειών
Απόδοση Αεροπορικών Εταιρειών
Airline Alliances
Airline Alliance Typologies
Airline Efficiency

description: The scope of the Thesis is to investigate and analyze the airline alliances that take place on a worldwide level. Initially, the main features of the airline industry are analyzed. In addition, the global regulatory framework of the global commercial air transport sector is analyzed, along with the evolution and current status of the three global airline alliance groups (Star, SkyTeam, Oneworld). In regard to the qualitative part of the Thesis, the developed airline alliance typologies are cited and subsequently an own-developed airline alliance typology is presented taking into account certain dimensions/parameters. As far as concerning the quantitative part of the Thesis, the methodological concept of Data Envelopment Analysis (DEA) is analyzed for the purpose of conducting comparative efficiency analysis on 30 international airlines. Main motivation for application of DEA is to assess the effects of certain operational factors on airline efficiency like global airline alliance group membership, freight traffic volume, size of operated aircraft fleet etc. Moreover, it should be mentioned that the results of the conducted quantitative analysis is in line with the results of previous relevant research efforts.
description: Σκοπός της διπλωματικής εργασίας είναι η εξέταση και ανάλυση των συμμαχιών που συνάπτουν οι αεροπορικές εταιρείες ανά τον κόσμο. Αρχικά,αναλύονται τα κύρια χαρακτηριστικά του κλάδου των πολιτικών αερομεταφορών. Συναφώς, εξετάζεται και αναλύεται το παγκόσμιο θεσμικό πλαίσιο των πολιτικών αερομεταφορών, η εξέλιξη των συμμαχιών των αεροπορικών εταιρειών, καθώς και τα τρία παγκόσμια γκρουπ αεροπορικών συμμαχιών (Star, SkyTeam, Oneworld). Αναφορικά με το θεωρητικό ερευνητικό τμήμα της εργασίας, παρατίθεται το σύνολο των αναπτυχθεισών τυπολογιών αφορώσες σε συμμαχίες αεροπορικών εταιρειών και προτείνεται επικαιροποιημένη τυπολογία με βάση συγκεκριμένες διαστάσεις/παραμέτρους. Επίσης, αναφορικά με το ποσοτικό ερευνητικό τμήμα της εργασίας αναλύεται η μεθοδολογία της Data Envelopment Analysis (DEA) και η εφαρμογή της για την συγκριτική ανάλυση απόδοσης σε 30 διεθνείς αεροπορικές εταιρείες. Κύριος σκοπός της εφαρμογής της DEA είναι η αποτίμηση της επίδρασης στην απόδοση των αεροπορικών εταιρειών, επιχειρησιακών παραγόντων όπως η συμμετοχή σε παγκόσμια γκρουπ συμμαχιών αεροπορικών εταιρειών, ο όγκος μεταφερόμενων εμπορευμάτων, το μεγέθος του στόλου αεροσκαφών κλπ. Επισημαίνεται ότι, τα αποτελέσματα της διεξαχθείσας ποσοτικής ανάλυσης είναι σε συμφωνία με τα αποτελέσματα προηγούμενων σχετικών ερευνητικών προσπαθειών.
Addressing strong correlation by approximate coupled-pair methods with active-space and full treatments of three-body clusters
Creators: name: Magoulas, Ilias
name: Shen, Jun
name: Piecuch, Piotr
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences

description: When the number of strongly correlated electrons becomes larger, the single-reference coupled-cluster (CC) CCSD, CCSDT, etc. hierarchy displays an erratic behaviour, while traditional multi-reference approaches may no longer be applicable due to enormous dimensionalities of the underlying model spaces. These difficulties can be alleviated by the approximate coupled-pair (ACP) theories, in which selected (T2)2 diagrams in the CCSD amplitude equations are removed, but there is no generally accepted and robust way of incorporating connected triply excited (T3) clusters within the ACP framework. It is also not clear if the specific combinations of (T2)2 diagrams that work well for strongly correlated minimum-basis-set model systems are optimum when larger basis sets are employed. This study explores these topics by considering a few novel ACP schemes with the active-space and full treatments of T3 correlations and schemes that scale selected (T2)2 diagrams by factors depending on the numbers of occupied and unoccupied orbitals. The performance of the proposed ACP approaches is illustrated by examining the symmetric dissociations of the H6 and H10 rings using basis sets of the triple- and double-ζ quality and the H50 linear chain treated with a minimum basis, for which the conventional CCSD and CCSDT methods fail.
Influence of a tight isotropic harmonic trap on photoassociation in ultracold homonuclear alkali gases
Creators: name: Grishkevich, Sergey
name: Saenz, Alejandro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The influence of a tight isotropic harmonic trap on photoassociation of two ultracold alkali atoms forming a homonuclear diatomic is investigated using realistic atomic interaction potentials. Confinement of the initial atom pair due to the trap leads to a uniform strong enhancement of the photoassociation rate to most, but also to a strongly suppressed rate for some final states. Thus tighter traps do not necessarily enhance the photoassociation rate. A further massive enhancement of the rate is found for strong interatomic interaction potentials. The details of this interaction play a minor role, except for large repulsive interactions for which a sharp window occurs in the photoassociation spectrum as is known from the trap-free case. A comparison with simplified models describing the atomic interaction like the pseudopotential approximation shows that they often provide reasonable estimates for the trap-induced enhancement of the photoassociation rate even if the predicted rates can be completely erroneous.
description: 19 pages, 17 figures
Cultural adaptation and translation of depression/anxiety screening tools in the Kashmir Valley, India
Creators: name: Shabnum Ara
Publisher: name: F1000Research
Year: 2015

description: Here, we planned to conduct a mental health (MH) survey to estimate prevalence of depression, anxiety and PTSD related symptoms in the Kashmir valley as we found there were no Kashmiri validated tools on the matter.Direct translation of these tools into Kashmiri would have led to inaccurate results. Transcultural adaptation and translation ensure tools identify local constructs for expressing symptoms of mental illness.

 
Measuring acute malnutrition, retrospective mortality and measles vaccination coverage through SMART survey in Darbhanga district, Bihar State, India
Creators: name: Mahajan, Raman
name: Temmy Sunyoto
name: Salse, Nuria
name: Shandilya, Chandra
name: Burza, Sakib
Publisher: name: F1000Research
Year: 2015

description: Here we used a SMART survey (a standardised and simplified field survey methodology which produces a snapshot of the current situation on the ground) to measure acute malnutrition, retrospective mortality and measles vaccination coverage in Darbhanga district, Bihar State, India.

 SMART methodology for nutrition surveys are feasible, needing minimal resources and relatively easy – can be considered as a method of choice.
Η μαγεία στο έργο της Adriana Assini. Η περίπτωση των μυθιστορημάτων La Riva Verde και Un sorso di arsenico
Creators: name: Καράδαγλη, Ελένη Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αντριάνα Ασίνι
Μαγεία
Ιστορικό μυθιστόρημα
Adriana Assini
Wizardry
Historical novel

description: Στην παρούσα μεταπτυχιακή διατριβή παρουσιάζονται εν συντομία τα είδη της μαγείας και στη συνέχεια ερευνάται ο τρόπος, με τον οποίο παρουσιάζεται το φαινόμενο της μαγείας, στα μυθιστορήματα της Αντριάνα Ασίνι Μια γουλιά αρσενικό και Η Πράσινη όχθη. Σκοπός της εργασίας είναι να εξεταστεί η εικόνα της μάγισσας κατά τον 15ο και 17ο αιώνα, ο τρόπος που χρησιμοποιείται η μαγεία από τις ηρωίδες της Ασίνι, καθώς και οι αιτίες που τις οδήγησαν να κάνουν χρήση της. Επίσης, παρουσιάζονται οι προλήψεις, οι δεισιδαιμονίες της εποχής, αλλά και η θέση που είχε η γυναίκα στο σπίτι και στην κοινωνία στο προς μελέτη χρονικό διάστημα μέσα από τα μάτια της Ασίνι
description: In this thesis the types of wizardry are briefly presented and then a research is carried out on the way the phenomenon of wizardry is presented in Adriana Assini’s novels “A Sip of Arsenic” and “The Green Bank”. The purpose of the essay is to look into the image of witches during the 15th and 17th century, the way wizardry is used by Assini’s characters as well as the reason which led them to make use of it. Furthermore, the superstitions of the time are presented and also the role of the woman both inside the house and the society during this period through Assini’s eyes
A statistical mechanics model for free-for-all airplane passenger boarding
Creators: name: Steffen, Jason H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: I present and discuss a model for the free-for-all passenger boarding which is employed by some discount air carriers. The model is based on the principles of statistical mechanics where each seat in the aircraft has an associated energy which reflects the preferences of the population of air travelers. As each passenger enters the airplane they select their seats using Boltzmann statistics, proceed to that location, load their luggage, sit down, and the partition function seen by remaining passengers is modified to reflect this fact. I discuss the various model parameters and make qualitative comparisons of this passenger boarding model with models which involve assigned seats. This model can also be used to predict the probability that certain seats will be occupied at different times during the boarding process. These results may be of value to industry professionals as a useful description of this boarding method. However, it also has significant value as a pedagogical tool since it is a relatively unusual application of undergraduate level physics and it describes a situation with which many students and faculty may be familiar.
description: version 1: 4 pages 2 figures version 2: 7 pages with 5 figures
Η υποδοχή των ρευμάτων της ευρωπαϊκής τέχνης στην Ελλάδα υπό το πρίσμα του αισθητισμού
Creators: name: Κερεζίδου, Στυλιανή Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αισθητισμός
Προ-ραφαηλίτες
Η τέχνη για την τέχνη
Aestheticism
Pre-Raphaelites
Art for art’s sake

description: Στόχος της μεταπτυχιακής εργασίας είναι να παρουσιάσει τη διεθνή μορφή του κινήματος του αισθητισμού με κεντρικό άξονα την Μεγάλη Βρετανία και έπειτα στα υπόλοιπα ευρωπαϊκά κέντρα της εποχής, εστιάζοντας κυρίως στο εικαστικό κομμάτι του κινήματος. Στη συνέχεια, γίνεται μια απόπειρα να εντοπιστούν τα στοιχεία εκείνα που χαρακτήρισαν το κίνημα στην Ευρώπη και στην καλλιτεχνική παραγωγή των Ελλήνων εικαστικών, λαμβάνοντας υπόψη φυσικά και το ευρύτερο κλίμα μέσα στο οποίο συνέθεσαν τις δημιουργίες τους
description: The aim of this study is to present the international form of the aestheticism with a central axis in Great Britain and then to the other European centers at the end of nineteenth century, focusing mainly on the visual part of the movement. The study continues with an attempt to identify the elements that characterized the aestheticism in Europe with the Greek works of art in the same era
E- and B-mode mixing from incomplete knowledge of the shear correlation
Creators: name: Kilbinger, Martin
name: Schneider, Peter
name: Eifler, Tim
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We quantify the mixing of the measured cosmic-shear E- and B-modes caused by the lack of shear-correlation measurements on small and large scales, arising from a lack of close projected galaxy pairs and the finite field size, respectively. Methods. We calculate the aperture-mass statistics and the E-/B-mode shear-correlation functions xi_{E, B +/-} where small- and large-scale cutoffs are taken into account. We assess the deviation of the obtained E-mode to the true E-mode and the introduction of a spurious B-mode. Results. The measured aperture-mass dispersion is underestimated by more than 10% on scales smaller than 12 times the lower cutoff. For a precise measurement of the E- and B-modes at the percent level using a combination of xi_{E, B +} and xi_{E, B -}, a field as large as 7 (2.4) degrees is necessary for ground-based (space-based) observations.
description: Research Note, A&A in press. 6 pages, 6 figures
Quantum Structure of Space Near a Black Hole Horizon
Creators: name: Gegenberg, J.
name: Kunstatter, G.
name: Small, R. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe a midi-superspace quantization scheme for generic single horizon black holes in which only the spatial diffeomorphisms are fixed. The remaining Hamiltonian constraint yields an infinite set of decoupled eigenvalue equations: one at each spatial point. The corresponding operator at each point is the product of the outgoing and ingoing null convergences, and describes the scale invariant quantum mechanics of a particle moving in an attractive $1/X^2$ potential. The variable $X$ that is analoguous to particle position is the square root of the conformal mode of the metric. We quantize the theory via Bohr quantization, which by construction turns the Hamiltonian constraint eigenvalue equation into a finite difference equation. The resulting spectrum gives rise to a discrete spatial topology exterior to the horizon. The spectrum approaches the continuum in the asymptotic region.
description: References added and typos corrected. 21 pages, 1 figure
Gravitational Larmor formula in higher dimensions
Creators: name: Cardoso, Vitor
name: Cavaglia, Marco
name: Guo, Jun-Qi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Larmor formula for scalar and gravitational radiation from a pointlike particle is derived in any even higher-dimensional flat spacetime. General expressions for the field in the wave zone and the energy flux are obtained in closed form. The explicit results in four and six dimensions are used to illustrate the effect of extra dimensions on linear and uniform circular motion. Prospects for detection of bulk gravitational radiation are briefly discussed.
description: 5 pages, no figures
การประเมินผลการประยุกต์ใช้ปรัชญาของเศรษฐกิจพอเพียงในการพัฒนาท้องถิ่นของเทศบาลเมืองชุมเห็ด ตำบลชุมเห็ด อำเภอเมืองบุรีรัมย์ จังหวัดบุรีรัมย์
Creators: name: ขวัญนภา วงศ์ไพศาลสิริกุล
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2556
Subjects: การประยุกต์ใช้ปรัชญาของเศรษฐกิจพอเพียง, การพัฒนาท้องถิ่น, เทศบาลเมืองชุมเห็ด

description: 2, 11, รมยสาร
Electromagnetic knots from de Sitter space
Creators: name: Lechtenfeld, Olaf
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We find all analytic SU(2) Yang-Mills solutions on de Sitter space by reducing the field equations to Newton's equation for a particle in a particular 3d potential and solving the latter in a special case. In contrast, Maxwell's equations on de Sitter space can be solved in generality, by separating them in hysperspherical coordinates. Employing a well-known conformal map between (half of) de Sitter space and (the future half of) Minkowski space, the Maxwell solutions are mapped to a complete basis of rational electromagnetic knot configurations. We discuss some of their properties and illustrate the construction method with two nontrivial examples given by rational functions of increasing complexity. The material is partly based on [1,2].
description: 1+11 pages, 4 figures, presented at the RDP online workshop "Recent Advances in Mathematical Physics" - Regio2020, 06 December 2020; v2: annoying typo in eq.(12) corrected
The Group Evolution Multiwavelength Study (GEMS): The near-infrared luminosity function of nearby galaxy groups
Creators: name: Miles, Trevor A.
name: Raychaudhury, Somak
name: Russell, Paul A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present J and K-band luminosity functions (LF) for the Group Evolution Multiwavelength Study (GEMS) sample of 60 nearby groups of galaxies, with photometry from the 2MASS survey. We find that, as seen in B and R-band photometry of a subsample of these groups in our earlier work, the LFs of the X-ray dim groups (L_X < 10^41.7 erg/s) show a depletion of galaxies of intermediate luminosity around M_K = -23, within a radius 0.3R_500 from the centres of these groups. This feature is not seen in the X-ray brighter groups, nor in either kind of group when the LFs are determined all the way out to R_500. We conclude that an enhanced level of star formation is not responsible for the this feature. From the faint end of the LFs, we find support for the under-abundance of low surface brightness dwarfs in the 2MASS survey. We find that for all kinds of groups, the modelling of the luminosity function, with universal forms for the LFs of galaxies of different morphological types, fails when simultaneously required to fit the B and K-band LFs. This means that the dip-like features seen in LFs are not merely due to the varying proportions of galaxies of different morphological types among the X-ray dim and bright groups. We argue that this support our hypothesis that this feature is due to the enhanced merging of intermediate-mass galaxies in the dynamically sluggish environment of X-ray dim groups.
description: Accepted for publication in MNRAS
Investigation of transverse depression formation during the continuous casting of steel using real-time mould thermal data
Creators: name: Adjei-Sarpong, Hanson Mark
Publisher: name: University of British Columbia
Year: 2009

description: With the need to achieve defect-free steel increasing, traditional methods of billet quality evaluation in the cold state are becoming inadequate as corrective actions can only be taken after the fact. Real-time monitoring of the billet casting process using signals from thermocouples embedded in the wall and other mechanical sensors has become attractive in predicting the occurrence of defects and controlling the appropriate operating parameters to minimize the generation of quality problems on-line. This study examined the formation of transverse depressions in the continuous casting of steel billets using real-time mould thermal data. A plant trial involving an instrumented mould was carried out at a mini mill designated as Company G. Signals from thermocouples installed in the mould wall, as well as from casting speed and metal level controllers, were sampled at 100 Hz during the casting of steel grades ranging from 0.12 to 0.83 %C with oil lubrication. Three billet samples corresponding to the beginning, middle and the end of each heat were collected and later subjected to metallographic analysis for cracks and solidification structures. Two different shapes of the depressions; "nose"- and smooth-type were identified during the billet samples analysis. Analysis of the mould thermal data revealed that a transverse depression is manifested as a drop in mould temperature as the depression passes by a given thermocouple position. The depressions were seen to initiate close to the meniscus, and travel down the mould length at the speed at which the strand is withdrawn. A rise in metal level was found to precede the formation of a depression. A mechanism has been proposed to explain these observations. Metal level fluctuations, oil flow rate, and casting speed (relative to section size), are critical parameters to the generation of the depressions. The mechanism of depression formation and other findings from this study conform to other related observations made in various steel plants. Other factors that were seen to influence the formation of the depressions include steel composition and mould taper.
การพัฒนาหลักสูตรฝึกอบรมเพื่อเสริมสมรรถนะครูในการจัดกิจกรรมการเรียนรู้เด็กปฐมวัยโรงเรียนเอกชนในภาคตะวันออกเฉียงเหนือ
Creators: name: อนัญภัทร ห่อไธสง
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2556
Subjects: สมรรถนะ, การจัดกิจกรรมการเรียนรู้เด็กปฐมวัย

description: 2, 11, รมยสาร
Reinforcing increase of ΔTC in MgB2 smart meta-superconductors by adjusting the concentration of inhomogeneous phases
Creators: name: Li, Yongbo
name: Han, Guangyu
name: Zou, Hongyan
name: Tang, Li
name: Chen, Honggang
name: Zhao, Xiaopeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Incorporating with inhomogeneous phases with high electroluminescence (EL) intensity to prepare smart meta-superconductors (SMSCs) is an effective method of increasing the superconducting transition temperature (Tc) and has been confirmed in both MgB2 and Bi(Pb)SrCaCuO systems. However, the increase of ΔTc has been quite small because of the low optimal concentrations of inhomogeneous phases. In this work, three kinds of MgB2 raw materials, namely, aMgB2, bMgB2, and cMgB2, were prepared with particle sizes decreasing in order. Inhomogeneous phases, Y2O3:Eu3+ and Y2O3:Eu3+/Ag, were also prepared and doped into MgB2 to study the influence of doping concentration on the ΔTc of MgB2 with different particle sizes. Results show that reducing the MgB2 particle size increases the optimal doping concentration of inhomogeneous phases, thereby increasing ΔTc. The optimal doping concentrations for aMgB2, bMgB2, and cMgB2 are 0.5%, 0.8%, and 1.2%, respectively. The corresponding ΔTc values are 0.4, 0.9, and 1.2 K, respectively. This work open a new approach to reinforcing increase of ΔTc in MgB2 SMSCs.
ผลการจัดกิจกรรมการเรียนรู้คณิตศาสตร์ โดยใช้กระบวนการแก้ปัญหาแบบ K-W-D-L เรื่อง ร้อยละที่มีต่อผลสัมฤทธิ์ทางการเรียนรู้คณิตศาสตร์ และความพึงพอใจต่อการเรียนของนักเรียนชั้นประถมศึกษาปีที่ 5 โรงเรียนอนุบาลบุรีรัมย์ จังหวัดบุรีรัมย์
Creators: name: นันทพร ฮิวจ์ส
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2556
Subjects: เทคนิค K-W-D-L, ผลสัมฤทธิ์ทางการเรียน, ความพึงพอใจต่อการเรียน, ประถมศึกษา

description: 2, 11, รมยสาร
การพัฒนาการบริหารแบบยึดโรงเรียนเป็นฐานของสถานศึกษาขั้นพื้นฐาน
Creators: name: พมรศรี  ชูรัตน์
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2556
Subjects: การบริหารแบบยึดโรงเรียนเป็นฐาน, ความเป็นผู้นำทางวิชาการของผู้อำนวยการโรงเรียน, การบริหารเพื่อการเปลี่ยนแปลงของผู้อำนวยการโรงเรียน, เจตคติของครูต่อการบริหารแบบยึดโรงเรียนเป็นฐาน, ความร่วมมือของบุคลากรในชุมชน

description: 2, 11, รมยสาร
Sub-Rayleigh characterization of a binary source by spatially demultiplexed coherent detection
Creators: name: Datta, Chandan
name: Len, Yink Loong
name: Łukanowski, Karol
name: Banaszek, Konrad
name: Jarzyna, Marcin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate theoretically coherent detection implemented simultaneously on a set of mutually orthogonal spatial modes in the image plane as a method to characterize properties of a composite thermal source below the Rayleigh limit. A general relation between the intensity distribution in the source plane and the covariance matrix for the complex field amplitudes measured in the image plane is derived. An algorithm to estimate parameters of a two-dimensional symmetric binary source is devised and verified using Monte Carlo simulations to provide super-resolving capability for high ratio of signal to detection noise (SNR). Specifically, the separation between two point sources can be meaningfully determined down to $\textrm{SNR}^{-1/2}$ in the units determined by the spatial spread of the transfer function of the imaging system. The presented algorithm is shown to make a nearly optimal use of the measured data in the sub-Rayleigh region.
description: 10 pages, 3 figures. Accepted for publication in Optics Express
Augmenting the World Bank’s estimates: Ireland’s Genuine Savings through boom and bust
Creators: name: McGrath, Luke
name: Hynes, Stephen
name: McHale, John
name: McGrath, Luke
name: Hynes, Stephen
name: McHale, John
Publisher: name: Unknown
Year: 2019
Subjects: subject: Environmental Economics and Policy
subject: Green accounting
subject: Genuine Savings
subject: Natural capital
subject: Wealth Accounting;
subject: Environmental accounting
subject: Sustainable development

description: The World Bank computes estimates of Genuine Savings (GS), a leading indicator of sustainable development, for most countries. A well-established literature has called for methodological enhancement. This paper presents augmented estimates of Irish GS throughout a period of unprecedented economic expansion and decline (1990 - 2016). A timeseries constructed predominantly from national sources includes the most comprehensive coverage of pollutants in the literature surveyed. We apply a novel method to aid the property rights designation assessment required for transboundary pollutant accounting. In sharp contrast to the World Bank’s estimates, our findings suggest that a modern developed economy can exhibit signs of unsustainability. Furthermore, extended environmental damages drive these results suggesting expanded country specific GS may diverge considerably from the World Bank’s estimates. We find rapid economic development and rapid declines in environmental damages can occur concurrently and on the transition away from an unsustainable path.
Two new sesquiterpenoid lactone derivatives from Lindera aggregata
Creators: name: Wen, Song-Song
name: Wang, Yan
name: Xu, Jia-Ping
name: Liu, Qi
name: Zhang, Lei
name: Zheng, Jing
name: Li, Lin
name: Zhang, Na
name: Liu, Xin
name: Xu, Yu-Wen
name: Sun, Zhen-Liang
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: Two new sesquiterpenoid lactone derivatives, linderin A (1) and linderin B (2) comprising a sesquiterpenoid lactone and a methyl geranylhomogentisate moiety together with six known compounds were isolated from the roots of Lindera aggregata. Their chemical structures were elucidated using extensive spectroscopic analysis including 1 D, 2 D NMR, and HR-ESI-MS data and compared with previously reported data. The absolute configurations of 1 and 2 were assigned based on the electronic circular dichroism calculation. Compound 2 showed moderate anticoagulant activity.
The kinetics of the flash converting reaction of MK (chalcocite) concentrate
Creators: name: Morgan, Grant John
Publisher: name: University of British Columbia
Year: 2009

description: The chemical kinetics and mechanism of the flash converting reaction of MK concentrate (approximately 93% chalcocite and 7% pentlandite) in oxygen containing atmospheres were determined. The reaction profile of individual particles undergoing flash oxidation in a laminar flow furnace was followed by observing the particle temperature and changes in apparent particle diameter with a fast response two-wavelength pyrometer; and these observations were compared to the predictions of a mathematical model of a single reacting particle. Flash reaction products were examined under a scanning electron microscope to determine chemical composition and particle morphology. A campaign of pilot plant trials was also conducted to further study the flash converting process. The initial oxidation of chalcocite at lower particle temperatures was determined to be chemically rate-controlled, to follow the Arrhenius rate law and to be first order with respect to oxygen partial pressure. It was established, by comparison of experimental particle ignitions results with the predictions of a mathematical model, that the activation energy of the low-temperature chemically rate-controlled reaction was 460 Id mol’. A dust generation mechanism was elucidated whereby preferential evaporation of copper from the surface of the particle leaves a nickel-rich shell encasing the particle. Continued oxidation of sulphides and metallic copper leads to ongoing particle heating and, upon reaching the boiling point of copper, the generation of copper vapour which either vents through a rupture or causes catastrophic fragmentation of the nickel-rich shell. A pilot plant campaign, conducted at the UBC mini pilot plant facility, tested various configurations of the concentrate-oxygen injector, and it was determined that the flash flame could be manipulated to decrease the dust generation rate. A vertical injector design that introduced the oxygen as a high velocity axial jet surrounded by freely falling MK concentrate gave dust generation rates that were as low as one-third of the dust generation rates produced in trials utilizing injector designs that introduced the concentrate and oxygen in a single stream.
Baryonic Resonance Studies with STAR
Creators: name: Salur, Sevil
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Yields and spectra of $Σ(1385)$ are measured in $p+p$, d+Au and Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV . The nuclear modification factors in d+Au collisions are presented. The $p_{T}$ dependent medium effects are investigated via the nuclear modification factors. The implications of these results on various models are discussed.
description: Strange Quark Matter 2006 Conference Talk Proceedings
Additional file 2 of Older working adults in the HEAF study are more likely to report loneliness after two years of follow-up if they have negative perceptions of their work quality
Creators: name: Bevilacqua, Gregorio
name: D’Angelo, Stefania
name: Ntani, Georgia
name: Syddall, Holly Emma
name: Harris, Elizabeth Clare
name: Linaker, Cathy
name: Stevens, Martin
name: Cooper, Cyrus
name: Walker-Bone, Karen
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2: Appendix 2 Cross-sectional baseline characteristics by loneliness status.doc: Baseline characteristics of participants according to loneliness status
Nodeless superconductivity in the infinite-layer electron-doped Sr_0.9La_0.1CuO_2 cuprate superconductor
Creators: name: Khasanov, R.
name: Shengelaya, A.
name: Maisuradze, A.
name: Di Castro, D.
name: Savić, I. M.
name: Weyeneth, S.
name: Park, M. S.
name: Jang, D. J.
name: Lee, S. -I.
name: Keller, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on measurements of the in-plane magnetic penetration depth λ_{ab} in the infinite-layer electron-doped high-temperature cuprate superconductor Sr_0.9La_0.1CuO_2 by means of muon-spin rotation. The observed temperature and magnetic field dependences of λ_{ab} are consistent with the presence of a substantial s-wave component in the superconducting order parameter in good agreement with the results of tunneling, specific heat, and small-angle neutron scattering experiments.
description: 6 pages, 5 figures
Efficient Sampling of Thermal Averages of Interacting Quantum Particle Systems with Random Batches
Creators: name: Ye, Xuda
name: Zhou, Zhennan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An efficient sampling method, the pmmLang+RBM, is proposed to compute the quantum thermal average in the interacting quantum particle system. Benefiting from the random batch method (RBM), the pmmLang+RBM reduces the complexity due to the interaction forces per timestep from $O(NP^2)$ to $O(NP)$, where $N$ is the number of beads and $P$ is the number of particles. Although the RBM introduces a random perturbation of the interaction forces at each timestep, the long time effects of the random perturbations along the sampling process only result in a small bias in the empirical measure of the pmmLang+RBM from the target distribution, which also implies a small error in the thermal average calculation. We numerically study the convergence of the pmmLang+RBM, and quantitatively investigate the dependence of the error in computing the thermal average on the parameters including the batch size, the timestep, etc. We also propose an extension of the pmmLang+RBM, which is based on the splitting Monte Carlo method and is applicable when the interacting potential contains a singular part.
Stars and Gas in the Inner Parts of Galaxies seen in SAURON Integral Field Observations
Creators: name: Peletier, R. F.
name: Fathi, K.
name: Allard, E. L.
name: Knapen, J. H.
name: Sarzi, M.
name: van de Ven, G.
name: Falcon-Barroso, J.
name: Cappellari, M.
name: de Zeeuw, P. T.
name: Emsellem, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We give two examples of spiral galaxies that show non-circular gas motions in the inner kiloparsecs, from SAURON integral field spectroscopy. We use harmonic decomposition of the velocity field of the ionized gas to study the underlying mass distribution, employing linear theory. The higher order harmonic terms and the main kinematic features of the observed data are consistent with an analytically constructed simple bar model. We also present maps of a number of strong absorption lines in M 100, derive simple stellar populations and correlate them with features in the gas kinematics.
description: 7 pages, 3 figures, to be published in 'The Fate of Gas in Galaxies', editors R. Morganti et al., New Astronomy Review (Elsevier). needs the elsart.cls style-file. A higher resolution version available at http://www.astro.rug.nl/~peletier/Research.html
Could nearby star-forming galaxies light up the point-like neutrino sky?
Creators: name: Ambrosone, Antonio
name: Chianese, Marco
name: Fiorillo, Damiano F. G.
name: Marinelli, Antonio
name: Miele, Gennaro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Star-forming and starburst galaxies, which are well-known cosmic-rays reservoirs, are expected to emit gamma-rays and neutrinos predominantly via hadronic collisions. In this Letter, we analyze the 10-year Fermi-LAT spectral energy distributions of 13 nearby galaxies by means of a physical model which accounts for high-energy proton transport in starburst nuclei and includes the contribution of primary and secondary electrons. In particular, we test the hypothesis that the observed gamma-ray fluxes are mostly due to star-forming activity, in agreement with the available star formation rates coming from IR and UV observations. Through this observation-based approach, we determine the most-likely neutrino counterpart from star-forming and starburst galaxies and quantitatively assess the ability of current and upcoming neutrino telescopes to detect them as point-like sources. Remarkably, we find that the cores of the Small Magellanic Cloud and the Circinus galaxy are potentially observable by KM3NeT/ARCA with 6 years of observation. Moreover, most of the nearby galaxies are likely to be just a factor of a few below the KM3NeT and IceCube-Gen2 point-like sensitivities. After investigating the prospects for detection of gamma-rays above TeV energies from these sources, we conclude that the joint observations of high-energy neutrinos and gamma-rays with upcoming telescopes will be an objective test for our emission model and may provide compelling evidence of star-forming activity as a tracer of neutrino production.
description: 7 pages, 2 figures, version 2, accepted and published in APJ letters
The Abel-Jacobi Map for Higher Chow Groups, II
Creators: name: Kerr, Matt
name: Lewis, James D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14C25, 14C30, 14C35, 14F42, 14F43

description: We explicitly describe cycle-class maps c_H from motivic cohomology to absolute Hodge cohomology, for smooth quasi-projective and (some) proper singular varieties, and compute special cases of the latter. For smooth projective varieties, we also study Hodge-theoretically defined "higher Abel-Jacobi maps" on the kernel of c_H; this leads to new results on nontrivial indecomposable higher Chow cycles in the regulator kernel.
description: 68 pages, 3 figures
Chiral phase-coexistence in compressed double-twist elastomers
Creators: name: Leighton, Matthew P.
name: Kreplak, Laurent
name: Rutenberg, Andrew D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We adapt the theory of anisotropic rubber elasticity to model cross-linked double-twist liquid crystal cylinders such as exhibited in biological systems. In mechanical extension we recover strain-straightening, but with an exact expression in the small twist-angle limit. In compression, we observe coexistence between high and low twist phases. Coexistence begins at small compressive strains and is robustly observed for any anisotropic cross-links and for general double-twist functions -- but disappears at large twist angles. Within the coexistence region, significant compression of double-twist cylinders is allowed at constant stress. Our results are qualitatively consistent with previous observations of swollen or compressed collagen fibrils, indicating that this phenomenon may be readily accessible experimentally.
description: 7 pages, 5 figures
The role of secondary prophylaxis in the management of HIV-VL co-infection: 7-years experience from West Bengal
Creators: name: Goswami, Rama Prosad
Publisher: name: F1000Research
Year: 2015

description: Before 2002 there was only a single case report of HIV and VL co-infection, but from 2003 cases reports increased rapidly. Here, we report our 7 year experience on what role secondary prophylaxis has played in the management of HIV and VL co-infection.
We have learnt that VL/HIV coinfection is increasing and can be quite deadly...deadlier than VL at least. Early initiation of ART appears to be a promising tool, but secondary prophylaxis against VL needs to be considered with seriousness with generation of evidences against opposition of eminences. To get a better understanding we need to conduct larger studies.
Profile changes associated with DM events in PSR J1713+0747
Creators: name: Lin, Fang Xi
name: Lin, Hsiu-Hsien
name: Luo, Jing
name: Main, Robert
name: McKee, James
name: Pen, Ue-Li
name: Simard, Dana
name: van Kerkwijk, Marten H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Propagation effects in the interstellar medium and intrinsic profile changes can cause variability in the timing of pulsars, which limits the accuracy of fundamental science done via pulsar timing. One of the best timing pulsars, PSR J1713+0747, has gone through two `dip' events in its dispersion measure (DM) time series. If these events reflect real changes in electron column density, they should lead to multiple imaging. We show that the events are are well fitted by an underdense corrugated sheet model, and look for associated variability in the pulse profile using principal component analysis. We find that there are transient pulse profile variations, but they vary in concert with the dispersion measure, unlike what is expected from lensing due to a corrugated sheet. The change is consistent in shape across profiles from both the Greenbank and Arecibo radio observatories, and its amplitude appears to be achromatic across the 820-MHz, 1.4-GHz, and 2.3-GHz bands, again unlike expected from interference between lensed images. This result is puzzling. We note that some of the predicted lensing effects would need higher time and frequency resolution data than used in this analysis. Future events appear likely, and storing baseband data or keeping multiple time-frequency resolutions will allow more in-depth study of propagation effects and hence improvements to pulsar timing accuracy.
description: 11 pages, 8 figures, 2 tables, typos corrected, references updated
On approximate inertial manifolds for the Navier-Stokes equations using finite elements
Creators: name: Walsh, Owen
Publisher: name: University of British Columbia
Year: 2009

description: The nonlinearity in the Navier-Stokes equations couples the large and small scales of motion in turbulent flow. The nonlinear Galerkin method (NGM) consists of inserting into the equation for the large scale motion the small scale motion as determined by an “approximate inertial manifold”. Despite the conceptual appeal of this idea, its theoretic- cal justification has been recently thrown into question. However, its actual performance as a computational method has remained largely untested. Temam and collaborators have reported a 50% speed p in their spectral code for spatially periodic flow but their experiments have been recently criticized. In any case, spatially periodic computations are of little practical use. The aim of this thesis has been to test the NGM in the more practical context of the finite element method. Using finite elements, there is ambiguity and difficulty because the coarse grid has no natural supplementary space. We analyze a family of supplementary spaces and it is found that the quality of the asymptotic error estimates depends on the choice. Choosing the space by the L²-projection, we prove that the resulting approximation is “asymptotically good”. These results extend and improve upon recent error estimates of Marion and collaborators. For any other choice, the estimates are weaker and if -- as we suspect — they are optimal it seems possible that the NGM may actually decrease the accuracy of calculations. We also analyzed a variant of the NGM that we call “microscale linearization” (MSL). We prove that the MSL is “asymptotically good” for any member of this family of supplementary spaces. Turning to calculations, choosing the supplementary space by the Ritz projection, we implemented the NGM by modifying a 2-D Navier Stokes code of Turek; it performed very poorly. We implemented a variant of the MSL. It performed better, but still not as well as the original code. We sought a further understanding of these results by considering the 1-D Burgers equation. In conclusion, we find no numerical evidence that these methods are better than the standard finite element method. In fact, unless the coarse mesh is itself very fine, all versions performed poorly.
Non-thermal origin of nonlinear transport across magnetically induced superconductor-metal-insulator transition
Creators: name: Seo, Y.
name: Qin, Y.
name: Vicente, C. L.
name: Choi, K. S.
name: Yoon, Jongsoo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have studied the effect of perpendicular magnetic fields and temperatures on the nonlinear electronic transport in amorphous Ta superconducting thin films. The films exhibit a magnetic field induced metallic behavior intervening the superconductor-insulator transition in the zero temperature limit. We show that the nonlinear transport in the superconducting and metallic phase is of non-thermal origin and accompanies an extraordinarily long voltage response time.
description: 5 pages, 4 figures
EMG Signal Classification Using Reflection Coefficients and Extreme Value Machine
Creators: name: Azhiri, Reza Bagherian
name: Esmaeili, Mohammad
name: Jafarzadeh, Mohsen
name: Nourani, Mehrdad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Electromyography is a promising approach to the gesture recognition of humans if an efficient classifier with high accuracy is available. In this paper, we propose to utilize Extreme Value Machine (EVM) as a high-performance algorithm for the classification of EMG signals. We employ reflection coefficients obtained from an Autoregressive (AR) model to train a set of classifiers. Our experimental results indicate that EVM has better accuracy in comparison to the conventional classifiers approved in the literature based on K-Nearest Neighbors (KNN) and Support Vector Machine (SVM).
description: Accepted for presentation in IEEE Biomedical Circuits and Systems Conference (BioCAS 2021)
Increased risk of treatment failure in an HIV-infected adolescent cohort in southern Myanmar
Creators: name: Ousley, Janet
name: Kyaw, Nang Thu Thu
name: Shetty, Sharmila
name: Phyu Ei Mon
name: Kyi Pyar Soe
name: Anicete, Ray
name: Fernandez, Marcelo
Publisher: name: F1000Research
Year: 2015

description: This study looked at why there is an increased risk of treatment failure in an HIV infected adolescent cohort in Southern Myanmar.Adolescents are a unique group with distinct needs to paediatric and adult cohort. Systematically disaggregating adolescent data is an important step to better addressing adolescent needs. We found that peer support groups are a successful tool, but adolescents should be involved in planning (when, what kinds of activities, etc).