cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Small Dwarf Galaxies Within Larger Dwarfs: Why Some Are Luminous While Most Go Dark
Creators: name: D'Onghia, Elena
name: Lake, George
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the possibility that the Magellanic Clouds were the largest members of a group of dwarf galaxies that entered the Milky Way (MW) halo at late times. Seven of the eleven brightest satellites of the MW may have been part of this system. The proximity of some dwarfs to the plane of the orbit of the Large Magellanic Cloud (LMC) has been used to argue that they formed from tidal debris from the LMC and Small Magellanic Cloud (SMC). Instead, they may owe to the tidal breakup of the Magellanic Group. This can explain the association of many of the dwarf galaxies in the Local Group with the LMC system. It provides a mechanism for lighting up dwarf galaxies and reproduces the bright end of the cumulative circular velocity distribution of the satellites in the MW without invoking a stripping scenario for the subhalos to match the satellite distribution expected according to CDM theory. Finally, our model predicts that other isolated dwarfs will be found to have companions. Evidence for this prediction is provided by nearby, recently discovered dwarf associations.
description: ApJ Letters in press
Physical Nature of the Eclipsing δ Scuti Star AO Serpentis
Creators: name: Park, Jang-Ho
name: Lee, Jae Woo
name: Hong, Kyeongsoo
name: Koo, Jae-Rim
name: Kim, Chun-Hwey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the absolute properties of the eclipsing binary AO Ser with a pulsating component from our $BV$ photometric and high-resolution spectroscopic observations, which were performed between April and May 2017. The radial velocities (RVs) for both components were measured, and the effective temperature and projected rotational velocity of the primary star were determined to be $T_{\rm eff,1}$ = 8,820 $\pm$ 62 K and $v_1 \sin i_{1}$ = 90 $\pm$ 18 km s$^{-1}$, respectively, by comparing the observed spectrum with the Kurucz models. The accurate fundamental parameters of AO Ser were determined by a simultaneous analysis of the light and RV curves. The masses and radii of the primary and secondary components are $M_1$ = 2.55 $\pm$ 0.09 M$_\odot$ and $R_1$ = 1.64 $\pm$ 0.02 R$_\odot$ and $M_2$ = 0.49 $\pm$ 0.02 M$_\odot$ and $R_2$ = 1.38 $\pm$ 0.02 R$_\odot$, respectively. Multiple frequency analyses for the eclipse-subtracted light residuals were conducted. As a result, we detected two frequencies of $f_1$ = 21.852 days$^{-1}$ and $f_2$ = 23.484 days$^{-1}$. The evolutionary position on the HR diagram and the pulsational characteristics indicate that the primary star is a $δ$ Sct pulsator with a radial fundamental mode. On the other hand, the relatively evolved secondary is oversized for its own mass.
description: 19 pages, including 7 figures and 3 tables, accepted for publication in AJ
Control of the lympho-myeloid potential of murine hematopoietic stem cells
Creators: name: Lemieux, Madeleine Estelle
Publisher: name: University of British Columbia
Year: 2009

description: Little is known about the mechanisms that regulate the maintenance and expression of the self-renewal and differentiation properties of hematopoietic stem cells (HSC) in vivo or in vitro. Murine HSC can be detected and quantitated by in vivo assays and there is evidence to suggest that many, if not all, HSC can be detected in vitro by their ability to sustain the longterm production of colony-forming cells in culture. However, at the time this thesis was initiated, reproducible and specific assays for the in vitro detection and manipulation of lympho-myeloid progenitors had not been developed. I have devised such an assay which relies on the joint expression of lymphoid and myeloid differentiative potentials in the same culture. My studies have shown that the cells detected by this assay, termed LTC-IC[sub ML], are closely related to totipotent cells with long-term competitive in vivo repopulating potential (CRU) by their similar resistance to killing by 5-fluorouracil and their >500-fold co-enrichment in a -0.03% subpopulation of adult marrow cells. The myeloid LTC-IC and LTC-IC[sub ML] assays were used to determine whether the maintenance of long-term in vitro lympho-myeloid differentiation potential correlates with the persistence of in vivo multilineage reconstitution ability. We found that LTC-IC and LTC-IC[sub ML] are both better maintained in culture than CRU, suggesting that the ability to generate clonogenic progenitors in vitro for ≥4 weeks and the ability to competitively reconstitute all lineages in myeloablated recipients can be differently regulated. As a first step towards analyzing the mechanism(s) utilized by the stromal feeder layer in stimulating LTC-IC[sub ML] in vitro, its replacement with two stromal cell-derived growth factors, interleukin (IL)-11 and the Flt3 ligand (FL) were investigated. A subpopulation of fetal liver cells highly enriched for CRU was used as a starting material since both IL-11 and FL had previously been reported to act on primitive fetal liver-derived hematopoietic cells. The results of these experiments show that both IL-11 and FL support the development and maturation of early B lineage cells but that their activities in this regard are not identical.
คุณลักษณะสารสกัดจากพืชวงศ์ Apiaceae และ Piperaceae จำนวน 4 ชนิด
Creators: name: อรพิน เกิดชูชื่น
name: ณัฏฐา เลาหกุลจิตต์
name: มณฑกาญจน์ ชนะภัย
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: คื่นฉ่าย,พลู,พริกไทยขาว,พริกไทยดำ,สารสกัด,Gas chromatography mass spectrometry (GC-MS)

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Quantum Higgs Inflation
Creators: name: Bojowald, Martin
name: Brahma, Suddhasattwa
name: Crowe, Sean
name: Ding, Ding
name: McCracken, Joseph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Higgs field is an attractive candidate for the inflaton because it is an observationally confirmed fundamental scalar field. Importantly, it can be modeled by the most general renormalizable scalar potential. However, if the classical Higgs potential is used in models of inflation, it is ruled out by detailed observations of the cosmic microwave background. Here, a new application of non-adiabatic quantum dynamics to cosmological models is shown to lead to a multi-field Higgs-like potential, consistent with observations of a slightly red-tilted power spectrum and a small tensor-to-scalar ratio, without requiring non-standard ingredients. These methods naturally lead to novel effects in the beginning of inflation, circumventing common fine-tuning issues by an application of uncertainty relations to estimate the initial quantum fluctuations in the early universe. Moreover, inflation ends smoothly as a consequence of the derived multi-field interactions.
description: 16 pages, 5 figures
Generation of dopaminergic or cortical neurons from neuronal progenitors
Creators: name: Chen, Xiuqing
name: Lauinger, Nadine
name: Rocha, Cecilia
name: Rao, Trisha
name: Durcan, Thomas M.
Publisher: name: Zenodo
Year: 2019
Subjects: induced pluripotent stem cells
iPSCs
neuronal progenitors
dopaminergic neurons
cortical neurons

description: This protocol describes how to:
 • Culture dopaminergic (DA) or cortical neural progenitor cells (NPCs)
 • Generate DA or cortical neurons from DA or cortical NPCs, respectively Version 2.0 now available.
การพัฒนาประสิทธิภาพที่อุดหูจากยางธรรมชาติ
Creators: name: สุรชาติ สินวรณ์
name: ณัฐบดี วิริยาวัตน์
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: ยางธรรมชาติ,ที่อุดหู,เครื่องวัดเสียง

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Deep Multimodality Learning for UAV Video Aesthetic Quality Assessment
Creators: name: Kuang, Qi
name: Jin, Xin
name: Zhao, Qinping
name: Zhou, Bin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Despite the growing number of unmanned aerial vehicles (UAVs) and aerial videos, there is a paucity of studies focusing on the aesthetics of aerial videos that can provide valuable information for improving the aesthetic quality of aerial photography. In this article, we present a method of deep multimodality learning for UAV video aesthetic quality assessment. More specifically, a multistream framework is designed to exploit aesthetic attributes from multiple modalities, including spatial appearance, drone camera motion, and scene structure. A novel specially designed motion stream network is proposed for this new multistream framework. We construct a dataset with 6,000 UAV video shots captured by drone cameras. Our model can judge whether a UAV video was shot by professional photographers or amateurs together with the scene type classification. The experimental results reveal that our method outperforms the video classification methods and traditional SVM-based methods for video aesthetics. In addition, we present three application examples of UAV video grading, professional segment detection and aesthetic-based UAV path planning using the proposed method.
description: IEEE Trans. on Multimedia, 2020
Quark number susceptibilities: lattice QCD versus PNJL model
Creators: name: Ratti, Claudia
name: Roessner, Simon
name: Weise, Wolfram
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quark number susceptibilities at finite quark chemical potential are investigated in the framework of the Polyakov-loop-extended Nambu Jona-Lasinio (PNJL) model. A detailed comparison is performed between the available lattice data, extrapolated using a Taylor expansion around vanishing chemical potential, and PNJL results consistently obtained from a Taylor series truncated at the same order. The validity of the Taylor expansion is then examined through a comparison between the full and truncated PNJL model calculations.
description: 8 pages, 2 figures
Νομικό πλαίσιο των προστατευόμενων περιοχών και η εφαρμογή του στην Ελλάδα και στις Ομορες χώρες της Νοτιοανατολικής Ευρώπης:
Creators: name: Γεωργιάδης, Χρήστος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Περιβάλον
Προστατευόμενες περιοχές
Οικότοποι
Environment
Protected areas
Habitats

description: Σκοπός της παρούσας εργασίας είναι η αναζήτηση, η καταγραφή, η σύγκριση του βαθμού εφαρμογής του Νομοθετικού πλαισίου που αφορά τις προστατευόμενες περιοχές στις πέντε χώρες της Νοτιοανατολικής Ευρώπης, Ελλάδα, Αλβανία, Βουλγαρία, ΠΓΔΜ και Τουρκία. Η έρευνα και η μελέτη του νομοθετικού πλαισίου αλλά και οι απόψεις των συμμετεχόντων στην διαχείριση των προστατευόμενων περιοχών έδειξε ότι:Οι πέντε χώρες διαθέτουν αρκετά ικανοποιητικό νομοθετικό πλαίσιο το οποίο τείνει να εναρμονιστεί με το Ευρωπαϊκό δίκαιο και τις Ευρωπαϊκές Οδηγίες. Η ένταξη των χωρών (Ελλάδα και Βουλγαρία) στην Ευρωπαϊκή Ένωση αλλά και η προοπτική της ένταξης για τις υπόλοιπες χώρες (Αλβανία, ΠΓΔΜ και Τουρκία) αποτελεί θετικό βήμα για την προστασία του περιβάλλοντος στις χώρες αυτές. Ωστόσο υπάρχει πρόβλημα στην εφαρμογή της σχετικής νομοθεσίας αφού τα συμφέροντα πολλές φορές προηγούνται τις προστασίας. Όσο αφορά την διακυβέρνηση των προστατευόμενων περιοχών, στην Ελλάδα υπάρχει συμμετοχή φορέων στην διαχείρισή τους ενώ στις άλλες χώρες (Αλβανία, Βουλγαρία, ΠΓΔΜ και Τουρκία η διαχείριση εφαρμόζεται μέσω των υπηρεσιών των υπουργείων Περιβάλλοντος με ελάχιστη συμμετοχή άλλων φορέων.
description: The purpose of this study is to search, record, compare the legislative framework of protected areas in five countries of Southeast Europe, Greece, Albania, Bulgaria, FYROM and Turkey. The rresearch and study of the legislative framework and the views of participants in the management of protected areas showed that:The five countries have a fairly good legal framework which tends to align with European law and European Directives.The member countries (Bulgaria and Greece) of the European Union and the prospect of accession for the remaining countries (Albania, Macedonia and Turkey) is a positive step towards protecting the environment and implementation of the legislation in these countries. However there is a problem in the implementation of the legislation when sometimes the interests are stronger than protection of the environment. As regards the governance of protected areas, in Greece there are management bodies with participation of different kind of stakeholders, in other countries (Albania, Bulgaria, Macedonia and Turkey) managed service delivered through the ministry of Environment with minimum or luck involvement of other stakeholders.
What are the parities of photon-ring images near a black hole?
Creators: name: Meena, Ashish Kumar
name: Saha, Prasenjit
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Light that grazes a black-hole event horizon can loop around one or more times before escaping again, resulting for distance observers in an infinite sequence of ever fainter and more delayed images near the black hole shadow. In the case of the M87 and Sgr A$^*$ back holes, the first of these so-called photon-ring images have now been observed. A question then arises: are such images minima, maxima, or saddle-points in the sense of Fermat's principle in gravitational lensing? or more briefly, the title question above. In the theory of lensing by weak gravitational fields, image parities are readily found by considering the time-delay surface (also called the Fermat potential or the arrival-time surface). In this work, we extend the notion of the time delay surface to strong gravitational fields and compute the surface for a Schwarzschild black hole. The time-delay surface is the difference of two wavefronts, one travelling forward from the source and one travelling backwards from the observer. Image parities are read off from the topography of the surface, exactly as in the weak-field regime, but the surface itself is more complicated. Of the images, furthest from the black hole and similar to the weak-field limit, are a minimum and a saddle point. The strong field repeats the pattern, corresponding to light taking one or more loops around the back hole. In between, there are steeply-rising walls in the time-delay surface, which can be interpreted as maxima and saddle points that are infinitely delayed and not observable -- these correspond to light rays taking a U-turn around the black hole.
description: 11 pages. 7 figures. 3 appendix. Accepted in OJA
Angular distributions in three-body baryonic B decays
Creators: name: Geng, C. Q.
name: Hsiao, Y. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the angular distributions of the baryon-antibaryon low-mass enhancements in the three-body baryonic B decays of $B\to p\bar{p}M$ (M=K and $π$) in the framework of the perturbative QCD. By writing the most general forms for the transition form factors of $B\to p\bar{p}$, we find that the angular distribution asymmetry in $B^-\to p\bar{p}K^-$ measured by the Belle Collaboration can be explained. We give a quantitative description on the Dalitz plot asymmetry in $B^-\to p\bar{p}K^-$ shown by the BaBar Collaboration and demonstrate that it is equivalent to the angular asymmetry. In addition, we present our results on $\bar B^0\to p\bar{p}K_S$ and $B^-\to p\bar{p}π^-$ and we obtain that their angular asymmetries are $-0.35\pm0.11$ and $0.45\pm0.10$, respectively, which can be tested by the ongoing experiments at the B factories.
description: 4 pages, 2 figures, version to be published in PRD
การพัฒนาสำรับอาหารไทยเพื่อสุขภาพ บนพื้นฐานเศรษฐกิจพอเพียงและบริบทชุมชน
Creators: name: รวีโรจน์ อนันตธนาชัย และคณะ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: สำรับอาหารไทยเพื่อสุขภาพ,ปรัชญาเศรษฐกิจพอเพียง,บริบทชุมชน,อาหารไทยท้องถิ่น

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Διερεύνηση συμπεριφοράς οδηγών αυτοκινήτου, υπό συνθήκες σωματικής κόπωσης με χρήση καινοτόμων τεχνολογιών:
Creators: name: Μητρίδης, Ιωάννης Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Συμπεριφορά οδηγών
Σωματική κόπωση
Road safety
Fatigue
Car driver's behaviour

description: Το θέμα της παρούσας διπλωματικής εργασίας πραγματεύεται την οδήγηση και πως αυτή επηρεάζεται από την κόπωση, με τη χρήση καινοτόμων τεχνολογιών. Συγκεκριμένα, γίνεται προσπάθεια να εντοπισθεί αν και κατά πόσο η κούραση αποτελεί ανασταλτικό παράγοντα στην ασφαλή οδήγηση. Τα τελευταία χρόνια γίνεται μεγάλη προσπάθεια, στη χώρα μας αλλά και στην Ευρώπη, να μειωθούν τα οδικά ατυχήματα, καθώς σύμφωνα με στατιστικά στοιχεία το πρόβλημα της οδικής ασφάλειας είναι ιδιαίτερα οξυμένο. Η οδική ασφάλεια είναι ένα ζήτημα το οποίο αποτελείται από πολλούς παραμέτρους, γεγονός που καταδεικνύει την αναγκαιότητα προσέγγισης του με μία συγκροτημένη και ορθολογική πολιτική. Ένας παράγοντας, στον οποίο δεν έχει δοθεί η δέουσα σημασία, επηρεάζοντας την οδική ασφάλεια είναι η κόπωση του οδηγού. Το γεγονός αυτό οφείλεται είτε στο ότι υπάρχουν εν γένει δυσκολίες στο να καταλογισθεί ως αιτία ατυχήματος, είτε στο ότι θεωρείται μικρό το ποσοστό ατυχημάτων αυτής της κατηγορίας. Ειδικότερα, στόχος της εργασίας υπήρξε ο προσδιορισμός των αλλαγών στην συμπεριφορά του οδηγού λόγω της κόπωσης, εγχείρημα δύσκολο λόγω του μεγάλου αριθμού των παραμέτρων που την επηρεάζουν, ειδικότερα σε ένα περιβάλλον που δεν είναι αυστηρά ελεγχόμενο. Πιο συγκεκριμένα, μετά την ολοκλήρωση των μετρήσεων, με τη χρήση ειδικού εξοπλισμού, και την κατάλληλη επεξεργασία έγινε προσπάθεια να βρεθεί αν και κατά πόσο υπήρξαν αλλαγές στον τρόπο οδήγησης των συμμετεχόντων, επισημαίνοντας τα σημεία που χρήζουν μεγαλύτερης προσοχής.
description: The subject of the thesis deals with the driving and how it is effected by driver’s fatigue, with the use of innovative technology. Specifically, an attempt is made to find out if and how fatigue is a negative factor of safe driving. Last years, not only at Europe but also at Greece, is made an attempt for the reduction of road crashes as, according to statistics, the problem of road safety is extremely peaked. Road safety is a matter which is made up of many parameters, a fact that evince the necessity of its approaching with a rational politic. A factor which is not notably attended and affects the road safety, is the driver’s fatigue. This is due to either not acceptance as a crash factor either the proportion of this category’s crashes is small. Especially, the target of this research is the determination of driver’s behavior changes due to fatigue, something that is difficult because of the large number of parameters which affects it, let alone to a not strictly controlled environment. Specifically, after the completion of measurements, with the use of a particular equipment and processing, it was tried to find out if and how changes were taken place to the driving way of participants, pointing out the points which were needed a bigger attention.
Generation of dopaminergic or cortical neurons from neuronal progenitors
Creators: name: Chen, Xiuqing
name: Lauinger, Nadine
name: Rocha, Cecilia
name: Rao, Trisha
name: Durcan, Thomas M.
Publisher: name: Zenodo
Year: 2019
Subjects: induced pluripotent stem cells
iPSCs
neuronal progenitors
dopaminergic neurons
cortical neurons

description: This protocol describes how to:
 • Culture dopaminergic (DA) or cortical neural progenitor cells (NPCs)
 • Generate DA or cortical neurons from DA or cortical NPCs, respectively
Digital analysis of early color photographs taken using regular color screen processes
Creators: name: Hubička, Jan
name: Kimrová, Linda
name: Klaeser, Kenzie
name: Manco, Sara
name: Peterson, Doug
Publisher: name: arXiv
Year: 2023
Subjects: subject: Graphics (cs.GR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences
subject: I.4.1; I.4.5; I.4.8

description: Some early color photographic processes based on special color screen filters pose specific challenges in their digitization and digital presentation. Those challenges include dynamic range, resolution, and the difficulty of stitching geometrically-repeating patterns. We describe a novel method used to digitize the collection of early color photographs at the National Geographic Society which makes use of a custom open-source software tool to analyze and precisely stitch regular color screen processes.
description: 8 pages, 4 figures, submitted to the proceedings of XVIII Color Conference
Gene cloning and characterization of an exocellobiohydrolase (Cbh B) from Cellulomonas fimi
Creators: name: Shen, Hua
Publisher: name: University of British Columbia
Year: 2009

description: The objective of this study was to characterize a cellulose-binding polypeptide, Cbpl20, from Cellulomonas fimi. The gene cbpllO was cloned, its nucleotide sequence determined and the amino acid sequence it encodes deduced. The gene encodes a polypeptide of 1090 amino acids. Mature protein is 1037 amino acids long with a predicted molecular weight of 109,765. Cbpl20 is non-glycosylated as judged by lack of reaction with the periodic acid-Schiff reagent. The enzyme comprises five domains: an N-terminal catalytic domain of 643 amino acids, followed by three fibronectin type III repeats of 97 amino acids each, and a C-terminal cellulose binding domain of 104 amino acids. The catalytic domain is in family 48 of glycoside hydrolases. Cbpl20 is a cellobiohydrolase (cellobiohydrolase B; CbhB) based on its ability to hydrolyze bacterial microcrystalline cellulose (BMCC), viscometric analysis of carboxymethylcellulose (CMC) hydrolysis, and the release of cellobiose as the major product from insoluble cellulose. CbhB catalyzes hydrolysis with inversion of anomeric carbon configuration. It removes cellobiose units from the reducing end of the cellulose molecule. It has an optimum pH of 7.0 for catalytic activity. CbhB binds to cellulose with similar affinity to other well-characterized C. fimi cellulases such as CenA and Cex. CbhB is the second exo-cellobiohydrolase found in C. fimi. Therefore, the cellulase system of C. fimi resembles those of fungi in comprising multiple endoglucanases and cellobiohydrolases. Furthermore, both the C. fimi and fungal cellulase systems contain cellobiohydrolases that hydrolyze the cellulose molecule from either the reducing end or the non-reducing end. The exo-cellobiohydrolases from C. fimi, CbhA, CbhB and the xylanase/exoglucanase Cex, all have low but detectable endoglucanase activity by the CMC-Congo red plate assay. It is thus clear that there is not a clear distinction between endo- and exoglucanases.
ผลของระดับความร้อนในการฆ่าเชื้อน้ำพริกกะปิบรรจุกระป๋อง
Creators: name: กิตติศักดิ์ วสันติวงศ์ และคณะ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: น้ำพริกกะปิ,ระดับความร้อนในการฆ่าเชื้อ,วิธีการหาสเกลความพอดี

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
อินเทอร์เน็ตบรอดคาสติ้งนวัตกรรมสร้างสรรค์ด้านการศึกษาเพื่อพัฒนาครูผู้ดูแลเด็กเล็ก ในศูนย์พัฒนาเด็กเล็กทั่วประเทศไทย: ระยะที่ 1
Creators: name: พรรณี สวนเพลง และคณะ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: อินเทอร์เน็ตบรอดคาสติ้ง,สวนดุสิตอินเทอร์เน็ตบรอดคาสติ้ง,อินเทอร์เน็ต,นวัตกรรมด้านการศึกษา,ครูผู้ดูแลเด็กเล็กในศูนย์พัฒนาเด็กเล็ก

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Understanding and improving the timing of PSR J0737-3039B
Creators: name: Noutsos, Aristeidis
name: Desvignes, G.
name: Kramer, M.
name: Wex, N.
name: Freire, P. C. C.
name: Stairs, I. H.
name: McLaughlin, M. A.
name: Manchester, R. N.
name: Possenti, A.
name: Burgay, M.
name: Lyne, A. G.
name: Breton, R. P.
name: Perera, B. B. P.
name: Ferdman, R. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The double pulsar (PSR J0737-3039A/B) provides some of the most stringent tests of general relativity (GR) and its alternatives. The success of this system in tests of GR is largely due to the high-precision, long-term timing of its recycled-pulsar member, pulsar A. On the other hand, pulsar B is a young pulsar that exhibits significant short-term and long-term timing variations due to the electromagnetic-wind interaction with its companion and geodetic precession. Improving pulsar B's timing precision is a key step towards improving the precision in a number of GR tests with PSR J0737-3039A/B. In this paper, red noise signatures in the timing of pulsar B are investigated using roughly a four-year time span, from 2004 to 2008, beyond which time the pulsar's radio beam precessed out of view ... The timing of pulsar B presented in this paper depends on the size of the pulsar's orbit, which was calculated from GR, in order to precisely account for orbital timing delays. Consequently, our timing cannot directly be used to test theories of gravity. However, our modelling of the beam shape and radial wind of pulsar B can indirectly aid future efforts to time this pulsar by constraining part of the additional red noise observed on top of the orbital delays. As such, we conclude that, in the idealised case of zero covariance between our model's parameters and those of the timing model, our model can bring about a factor 2.6 improvement on the measurement precision of the mass ratio, R = mA/mB, between the two pulsars: a theory-independent parameter, which is pivotal in tests of GR.
description: 43 pages, 28 figures, Accepted in A&A
Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit
Creators: name: Gyulchev, Galin N.
name: Yazadjiev, Stoytcho S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the present work we study numerically quasi-equatorial lensing by the charged, stationary, axially-symmetric Kerr-Sen dilaton-axion black hole in the strong deflection limit. In this approximation we compute the magnification and the positions of the relativistic images. The most outstanding effect is that the Kerr-Sen black hole caustics drift away from the optical axis and shift in clockwise direction with respect to the Kerr caustics. The intersections of the critical curves on the equatorial plane as a function of the black hole angular momentum are found, and it is shown that they decrease with the increase of the parameter $Q^{2}/M$. All of the lensing quantities are compared to particular cases as Schwarzschild, Kerr and Gibbons-Maeda black holes.
description: 31 pages, 17 figures; V2 references added, some typos corrected, V3 references added, language corrections, V4 table added, minor technical corrections
Mobility edge and locality of the overlap-Dirac operator with and without dynamical overlap fermions
Creators: name: JLQCD Collaboration
name: Yamada, N.
name: Aoki, S.
name: Fukaya, H.
name: Hashimoto, S.
name: Ishikawa, K-I.
name: Kanaya, K.
name: Kaneko, T.
name: Matsufuru, H.
name: Okamoto, M.
name: Onogi, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We perform a systematic study of low-lying eigenmodes of $H_w$ with various gauge actions to find the optimal choice for dynamical overlap fermion simulations, with which one may achieve lower numerical cost for HMC and better locality property of the overlap kernel. For this purpose, our study is made with emphasis on the distribution of low-lying eigenvalues and the mobility edge with and without dynamical overlap fermions.
description: 7 pages, 7 figures, talk presented at Lattice 2006 (chiral symmetry). References added
มาตรการด้านความปลอดภัยทางชีวภาพสำหรับนักวิจัย (ทางชีวการแพทย์)
Creators: name: ชลภัทร สุขเกษม
name: สุชาดา โทผล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: ความปลอดภัยทางชีวภาพ,ความมั่นคงทางชีวภาพ,การติดเชื้อทางห้องปฏิบัติการ

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Quantum Field Theory of Correlated Bose-Einstein condensates: II. Ward-Takahashi Identities and Correlation Functions
Creators: name: Kita, Takafumi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We derive Ward-Takahashi identities for correlated Bose-Einstein condensates based on the expressions of the first-order variations $(δΨ,δG)$ due to perturbations obtained in the preceding paper [T. Kita, J. Phys. Soc. Jpn. $\bf 90$, 024001 (2021)] for the condensate wave function $Ψ$ and Green's function $G$. They enable us to obtain several exact results on the density and current correlation functions $K_{νν'}^{}$, and also express $K_{νν'}^{}$ in terms of low-energy Green's functions and vertices. The latter expressions open up the possibility of constructing theory of superfluid Bose liquids in the same way as that for fermions at low temperatures. The vertices are found to have different limits depending on which of frequency $ω$ and wavenumber $q$ is set equal to zero first.
description: 11 pages
The Significance of the $C$-Numerical Range and the Local $C$-Numerical Range in Quantum Control and Quantum Information
Creators: name: Schulte-Herbrueggen, Thomas
name: Dirr, Gunther
name: Helmke, Uwe
name: Glaser, Steffen J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper shows how C-numerical-range related new strucures may arise from practical problems in quantum control--and vice versa, how an understanding of these structures helps to tackle hot topics in quantum information. We start out with an overview on the role of C-numerical ranges in current research problems in quantum theory: the quantum mechanical task of maximising the projection of a point on the unitary orbit of an initial state onto a target state C relates to the C-numerical radius of A via maximising the trace function |\tr \{C^\dagger UAU^\dagger\}|. In quantum control of n qubits one may be interested (i) in having U\in SU(2^n) for the entire dynamics, or (ii) in restricting the dynamics to {\em local} operations on each qubit, i.e. to the n-fold tensor product SU(2)\otimes SU(2)\otimes >...\otimes SU(2). Interestingly, the latter then leads to a novel entity, the {\em local} C-numerical range W_{\rm loc}(C,A), whose intricate geometry is neither star-shaped nor simply connected in contrast to the conventional C-numerical range. This is shown in the accompanying paper (math-ph/0702005). We present novel applications of the C-numerical range in quantum control assisted by gradient flows on the local unitary group: (1) they serve as powerful tools for deciding whether a quantum interaction can be inverted in time (in a sense generalising Hahn's famous spin echo); (2) they allow for optimising witnesses of quantum entanglement. We conclude by relating the relative C-numerical range to problems of constrained quantum optimisation, for which we also give Lagrange-type gradient flow algorithms.
description: update relating to math-ph/0702005
Hava Embolisi
Creators: name: Erkman Sanrı
Publisher: name: Zenodo
Year: 2018

description: Hava Embolisi; havanın, direk ileti ve basınç farkı yoluyla venöz veya arteryel sisteme girmesi olarak tanınlanmaktadır. Venöz hava girişi; künt ya da penetran travma, santral venöz kateter girişimi intravenöz kontrast enjeksiyonları ve ameliyatlar (örn. Oftalmolojik girişimler, nörocerrahi, dental prosedürler ve sezaryen doğum) ile gerçekleşir
Chandra Detection of Three X-ray Bright Quasars at z>5
Creators: name: Li, Jiang-Tao
name: Wang, Feige
name: Yang, Jinyi
name: Zhang, Yuchen
name: Fu, Yuming
name: Bian, Fuyan
name: Bregman, Joel N.
name: Fan, Xiaohui
name: Li, Qiong
name: Wu, Xue-Bing
name: Yu, Xiaodi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report Chandra detection of three UV bright radio quiet quasars at $z\gtrsim5$. We have collected a sufficient number of photons to extract an X-ray spectrum of each quasar to measure their basic X-ray properties, such as the X-ray flux, power law photon index ($Γ$), and optical-to-X-ray spectral slope ($α_{\rm OX}$). J074749+115352 at $z=5.26$ is the X-ray brightest radio-quiet quasar at $z>5$. It may have a short timescale variation (on a timescale of $\sim3800\rm~s$ in the observer's frame, or $\sim600\rm~s$ in the rest frame) which is however largely embedded in the statistical noise. We extract phase folded spectra of this quasar. There are two distinguishable states: a "high soft" state with an average X-ray flux $\sim2.7$ times of the "low hard" state, and a significantly steeper X-ray spectral slope ($Γ=2.40_{-0.32}^{+0.33}$ vs $1.78_{-0.24}^{+0.25}$). We also compare the three quasars detected in this paper to other quasar samples. We find that J074749+115352, with a SMBH mass of $M_{\rm SMBH}\approx1.8\times10^9\rm~M_\odot$ and an Eddington ratio of $λ_{\rm Edd}\approx2.3$, is extraordinarily X-ray bright. It has an average $α_{\rm OX}=-1.46\pm0.02$ and a 2-10 keV bolometric correction factor of $L_{\rm bol}/L_{\rm2-10keV}=42.4\pm5.8$, both significantly depart from some well defined scaling relations. We compare $Γ$ of the three quasars to other samples at different redshifts, and do not find any significant redshift evolution based on the limited sample of $z>5$ quasars with reliable measurements of the X-ray spectral properties.
description: 12 pages, 5 figures, 2 tables, accepted for publication by ApJ
A generalized quantum microcanonical ensemble
Creators: name: Naudts, Jan
name: Van der Straeten, Erik
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss a generalized quantum microcanonical ensemble. It describes isolated systems that are not necessarily in an eigenstate of the Hamilton operator. Statistical averages are obtained by a combination of a time average and a maximum entropy argument to resolve the lack of knowledge about initial conditions. As a result, statistical averages of linear observables coincide with values obtained in the canonical ensemble. Non-canonical averages can be obtained by taking into account conserved quantities which are non-linear functions of the microstate.
description: improved version, new title
The Third Image of the Large-Separation Lensed Quasar SDSS J1029+2623
Creators: name: Oguri, Masamune
name: Ofek, Eran O.
name: Inada, Naohisa
name: Morokuma, Tomoki
name: Falco, Emilio E.
name: Kochanek, Christopher S.
name: Kayo, Issha
name: Broadhurst, Tom
name: Richards, Gordon T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We identify a third image in the unique quasar lens SDSS J1029+2623, the second known quasar lens produced by a massive cluster of galaxies. The spectrum of the third image shows similar emission and absorption features, but has a redder continuum than the other two images which can be explained by differential extinction or microlensing. We also identify several lensed arcs. Our observations suggest a complicated structure of the lens cluster at z~0.6. We argue that the three lensed images are produced by a naked cusp on the basis of successful mass models, the distribution of cluster member galaxies, and the shapes and locations of the lensed arcs. Lensing by a naked cusp is quite rare among galaxy-scale lenses but is predicted to be common among large-separation lensed quasars. Thus the discovery can be viewed as support for an important theoretical prediction of the standard cold dark matter model.
description: 5 pages, 3 figures, accepted for publication in ApJ Letters
Transcriptional and translational regulation of a subgenomic mRNA of cucumber necrosis virus
Creators: name: Johnston, Julie Catherine
Publisher: name: University of British Columbia
Year: 2009

description: Cucumber necrosis virus (CNV) is a spherical virus which encapsidates a small messenger sense RN A genome. During infection, CN V generates a 0.9 kb subgenomic mRN A which directs the synthesis of two distinct proteins, p20 and p21, from different nested open reading frames (ORFs). Sequences comprising the core promoter for the synthesis of the CN V 0.9 kb subgenomic mRN A were determined using deletion analysis and site-directed mutagenesis. The results indicated that the CN V 0.9 kb subgenomic mRN A core promoter lies within a region located 20 nucleotides upstream and 6 nucleotides downstream of the transcription initiation site and that nucleotides immediately surrounding the initiation site also regulate promoter activity. Comparison of sequences within the core promoter region with the corresponding region in other tombusviruses revealed that the tombusvirus promoter shares a region of near complete identity in 14 of the 26 core promoter nucleotides. Similarities to other well studied plant and animal virus promoters or to other putative CNV promoters were not apparent. Expression of both CNV p20 and p21 from the 0.9 kb subgenomic mRN A represents one of the rare cases of production of two proteins from the same coding region of a single mRNA . In vitro translation of synthetic transcripts corresponding to the 0.9 kb subgenomic mRN A but containing point substitutions in the AU G codons for either p20 or p21 indicated that these proteins are indeed separately initiated from different nested ORFs. The regulation of the synthesis of these proteins was investigated through examining the effects of codon context and leader length on the efficiency of translation. Nucleotide substitutions introduced into the -3 and +4 positions of the p21 AU G codon verified that purines in these positions are favored and demonstrated the similar contribution of the -3 and +4 positions to the efficiency of initiation codon selection in plants. Further analyses also indicated that the codon context of the upstream p21 AU G codon affects expression from the downstream p20 AU G codon and that an increase in the length of the subgenomic mRN A leader decreases expression from the downstream site. These observations are in accordance with the "Kozak rules" for accession of internal AU G codons by leaky ribosomal scanning and provide the first example of an effect of leader length on the efficiency of translation initiation in a plant (viral) mRNA.
Slow roll in simple non-canonical inflation
Creators: name: Barenboim, Gabriela
name: Kinney, William H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider inflation using a class of non-canonical Lagrangians for which the modification to the kinetic term depends on the field, but not its derivatives. We generalize the standard Hubble slow roll expansion to the non-canonical case and derive expressions for observables in terms of the generalized slow roll parameters. We apply the general results to the illustrative case of ``Slinky'' inflation, which has a simple, exactly solvable, non-canonical representation. However, when transformed into a canonical basis, Slinky inflation consists of a field oscillating on a multi-valued potential. We calculate the power spectrum of curvature perturbations for Slinky inflation directly in the non-canonical basis, and show that the spectrum is approximately a power law on large scales, with a ``blue'' power spectrum. On small scales, the power spectrum exhibits strong oscillatory behavior. This is an example of a model in which the widely used solution of Garriga and Mukhanov gives the wrong answer for the power spectrum.
description: 9 pages, LaTeX, four figures. (V2: minor changes to text. Version submitted to JCAP.)
Distributed Coding of Quantized Random Projections
Creators: name: Goukhshtein, Maxim
name: Boufounos, Petros T.
name: Koike-Akino, Toshiaki
name: Draper, Stark C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: E.4; H.1.1; I.4.2; I.4.10
subject: 94A08 (Primary), 94A34 (Secondary), 94A12, 68P30, 68U10

description: In this paper we propose a new framework for distributed source coding of structured sources, such as sparse signals. Our framework capitalizes on recent advances in the theory of linear inverse problems and signal representations using incoherent projections. Our approach acquires and quantizes incoherent linear measurements of the signal, which are represented as separate bitplanes. Each bitplane is coded using a distributed source code of the appropriate rate, and transmitted. The decoder, starts from the least significant biplane and, using a prediction of the signal as side information, iteratively recovers each bitplane based on the source prediction and the signal, assuming all the previous bitplanes of lower significance have already been recovered. We provide theoretical results guiding the rate selection, relying only on the least squares prediction error of the source. This is in contrast to existing approaches which rely on difficult-to-estimate information-theoretic metrics to set the rate. We validate our approach using simulations on remote-sensing multispectral images, comparing them with existing approaches of similar complexity.
description: 16 pages, 8 figures
Berends-Giele currents for extended gravity
Creators: name: Tao, Yi-Xiao
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this short paper, we write down the Berends-Giele (BG) currents for extended gravity explicitly and discuss the unifying relations of these BG currents. This new tool, different from the double field theory current formally, may deepen our understanding of the current Kawai-Lewellen-Tye (KLT) relation.
description: published by prd
Twice-iterated boson-exchange scattering amplitudes
Creators: name: Kaiser, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate at two-loop order the complex-valued scattering amplitude related to the twice-iterated scalar-isovector boson-exchange between nucleons. In comparison to the once-iterated boson-exchange amplitude it shows less dependence on the scattering angle. We calculate also the iteration of the (static) irreducible one-loop potential with the one-boson exchange and find similar features. Together with the irreducible three-boson exchange potentials and the two-boson exchange potentials with vertex corrections, which are also evaluated analytically, our results comprise all nonrelativistic contributions from scalar-isovector boson-exchange at one- and two-loop order. The applied methods can be straightforwardly adopted to the pseudoscalar pion with its spin- and momentum-dependent couplings to the nucleon.
description: 9 pages, 7 figures, to be published in Physical Review C (2006)
A note on the Hamiltonian structure of transgression forms
Creators: name: Pais, Pablo
name: Salgado-Rebolledo, Patricio
name: Vera, Aldo
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: By incorporating two gauge connections, transgression forms provide a generalization of Chern-Simons actions that are genuinely gauge-invariant on bounded manifolds. In this work, we show that, when defined on a manifold with a boundary, the Hamiltonian formulation of a transgression field theory can be consistently carried out without the need to implement regularizing boundary terms at the level of first-class constraints. By considering boundary variations of the relevant functionals in the Poisson brackets, the surface integral in the very definition of a transgression action can be translated into boundary contributions in the generators of gauge transformations and diffeomorphisms. This prescription systematically leads to the corresponding surface charges of the theory, reducing to the general expression for conserved charges in (higher-dimensional) Chern-Simons theories when one of the gauge connections in the transgression form is set to zero.
description: 24 pages, 2 figures
Homonym Identification using BERT -- Using a Clustering Approach
Creators: name: Saha, Rohan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Homonym identification is important for WSD that require coarse-grained partitions of senses. The goal of this project is to determine whether contextual information is sufficient for identifying a homonymous word. To capture the context, BERT embeddings are used as opposed to Word2Vec, which conflates senses into one vector. SemCor is leveraged to retrieve the embeddings. Various clustering algorithms are applied to the embeddings. Finally, the embeddings are visualized in a lower-dimensional space to understand the feasibility of the clustering process.
Chiral phase modulation and tunable broadband perfect absorber using the coherent cold atomic ensemble
Creators: name: Wang, Yi-Xin
name: Zhang, Yan
name: Du, Lei
name: Wu, Jin-Hui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the two-channel nonreciprocal scattering of a coherent atomic ensemble under the linear spatial Kramers-Kronig modulation, which has potential applications in chiral phase modulation and broadband coherent perfect/asymmetric absorber that yet is typically unavailable in conventional continuous atomic media. In the regime of electromagnetically induced transparency, we observe the direction-dependent (chiral) phase modulation, which may enrich the burgeoning chiral quantum optics and can be used for implementing photonic filters, unidirectional amplifiers, and coherent asymmetric absorbers. By simplifying the stringent generation condition of coherent perfect absorption (CPA), we demonstrate the possibility of realizing two-channel CPA with broadband and sharp edges. Our proposal may be used to design and integrate some all-optical functional devices at extremely low power levels for quantum information processing and optical communication networks.
Towards continuum limit of screening lengths with chiral Fermions
Creators: name: Gavai, Rajiv V.
name: Gupta, Sourendu
name: Lacaze, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate mesonic screening correlators at T=2T_c using the overlap Fermions in the quenched approximation, where T_c is the QCD phase transition temperature. Using lattices with temporal extent up to 8, we found that both pseudoscalar and vector correlators exhibit a nice $cosh$ behaviour, leading to a plateau behaviour in the local screening masses as a function of distance. The rho and pi masses so determined show very little variation with the lattice spacing a. This augurs well for the use of chiral Fermions, and further suggests the small deviations of these masses from the ideal gas values are genuine effects of interactions.
description: 7 pages, 8 figures, Lattice 2006 (High Temperature and Density), PoS Format