cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Isocurvature bounds on axions revisited
Creators: name: Beltran, Maria
name: Garcia-Bellido, Juan
name: Lesgourgues, Julien
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The axion is one of the best motivated candidates for particle dark matter. We study and update the constraints imposed by the recent CMB and LSS experiments on the mass of axions produced by the misalignment mechanism, as a function of both the inflationary scale and the reheating temperature. Under some particular although not unconventional assumptions, the axionic field induces too large isocurvature perturbations. Specifically, for inflation taking place at intermediate energy scales, we derive some restrictive limits which can only be evaded by assuming an efficient reheating mechanism, with T>10^{11} GeV. Chaotic inflation with a quadratic potential is still compatible with the axion scenario, provided that the Peccei-Quinn scale f_a is close to 10^{10} or 10^{11} GeV. Isocurvature bounds eliminate the possibility of a larger f_a and a small misalignment angle. We find that isocurvature constraints on the axion scenario must be taken into account whenever the scale of inflation is above 10^{12} GeV; below this scale, axionic isocurvature modes are too small to be probed by current observations.
description: 12 pages, 3 figures; more concise version, new figures, accepted in PRD
ฤทธิ์ต้านอนุมูลอิสระของสารสกัดหยาบจากแก่นมะหาด : บทความวารสาร
Creators: name: อรพิณ โกมุติบาล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: มะหาด,การสกัด,ฤทธิ์ต้านอนุมูลอิสระ,ปริมาณฟีนอลิกทั้งหมด

description: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี, 7, 2
Rectification induced by geometry in two-dimensional quantum spin lattices
Creators: name: Chioquetta, Alessandra
name: Pereira, Emmanuel
name: Landi, Gabriel T.
name: Drumond, Raphael C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the role of geometrical asymmetry in the occurrence of spin rectification in two-dimensional quantum spin chains subject to two reservoirs at the boundaries, modeled by quantum master equations. We discuss the differences in the rectification for some one-dimensional cases, and present numerical results of the rectification coefficient R for different values of the anisotropy parameter of the XXZ model, and different configurations of boundary drives, including both local and non-local dissipators. Our results also show that geometrical asymmetry, along with inhomogeneous magnetic fields, can induce spin current rectification even in the XX model, indicating that the phenomenon of rectification due to geometry may be of general occurrence in quantum spin systems.
description: 6 pages, 11 figures
Holonomy and four-dimensional manifolds
Creators: name: Atkins, Richard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper we investigate the relationship between the existence of parallel semi-Riemannian metrics of a connection and the reducibility of the associated holonomy group. The question as to whether the holonomy group necessarily reduces in the presence of a specified number of independent parallel semi-Riemannian metrics is completely determined by the the signature of the metrics and the dimension, d, of the manifold, when d not equal to four. In particular, the existence of two independent, parallel semi-Riemannian metrics, one of which having signature (p,q) with p not equal to q, implies the holonomy group is reducible. The (p,p) cases, however, may allow for more than one parallel metric and yet an irreducible holonomy group: for n=2m, m >2, there exist connections on n-dimensional Euclidean space with irreducible infinitesimal holonomy and which have two independent, parallel metrics of signature (m,m). The case of four-dimensional manifolds, however, depends on the topology of the manifold in question: the presence of three parallel metrics always implies reducibility but reducibility in the case of two metrics of signature (2,2) is guaranteed only for simply connected manifolds. The main theorem in the paper is the construction of a topologically non-trivial four-dimensional manifold with a connection that admits two independent parallel metrics of signature (2,2) and yet has irreducible holonomy. We provide a complete solution to the general problem.
description: 11 pages; An expanded version with all proofs to the theorems may be found at the Bulletin of the Australian Mathematical Society
ผลของวิธีการสกัดต่อคุณสมบัติของสารสกัดเซลลูโลสจากกากเมล็ดมะรุม
Creators: name: ฐิตา ฟูเผ่า
name: อัจฉรา พรหมแสง
name: พัชรา อ้นโต
name: วีระ พุ่มเกิด
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: กากเมล็ดมะรุม,เซลลูโลส,การสกัด,ใยอาหาร

description: 2, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
PAH and nbL Features Detection in Planetary Nebulae NGC 7027 and BD +303639 with TIRCAM2 Instrument on 3.6m DOT
Creators: name: Anand, Rahul Kumar
name: Rastogi, Shantanu
name: Kumar, Brijesh
name: Ghosh, Arpan
name: Sharma, Saurabh
name: Ojha, D. k.
name: Ghosh, S. k.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High resolution infrared imaging observations of the young Planetary Nebulae NGC 7027 and BD +303639, taken with the newly installed TIFR Infrared Camera-II (TIRCAM2) on 3.6m Devasthal Optical Telescope (DOT), ARIES, Nainital, are being reported. The images are acquired in J, H, K, polycyclic aromatic hydrocarbon (PAH) and narrow-band L (nbL) filters. The observations show emission from warm dust and PAHs in the circumstellar shells. The imaging of the two objects are among the first observations in PAH and nbL bands using TIRCAM2 on DOT. The NGC 7027 images in all bands show similar elliptical morphology with ~6".7 and ~4".5 semi-major and semi-minor axes. Considering size up to 10% of peak value the nebula extends upto 8" from the central star revealing a multipolar evolution. The relatively cooler BD +303639 shows a rectangular-ring shaped nebula. In J and H bands it shows an angular diameter of ~8", while a smaller ~6".9 size is observed in K, PAH and nbL bands. The 3.28 micron emission indicates presence of PAHs at about 6000 and 5000 AU from the central stars in NGC 7027 and BD +303639 respectively. Analysis suggests domination of neutral PAHs in BD+303639, while in NGC 7027 there is higher ionization and more processed PAH population.
description: 8 Figures, 5 Tables accepted in J of Astronomy and Astrophysics
Electron transport in a slot-gate Si MOSFET
Creators: name: Shlimak, I.
name: Ginodman, v.
name: Butenko, A.
name: Friedland, K. -J.
name: Kravchenko, S. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The transversal and longitudinal resistance in the quantum Hall effect regime was measured in a Si MOSFET sample in which a slot-gate allows one to vary the electron density and filling factor in different parts of the sample. In case of unequal gate voltages, the longitudinal resistances on the opposite sides of the sample differ from each other because the originated Hall voltage difference is added to the longitudinal voltage only on one side depending on the gradient of the gate voltages and the direction of the external magnetic field. After subtracting the Hall voltage difference, the increase in longitudinal resistance is observed when electrons on the opposite sides of the slot occupy Landau levels with different spin orientations.
description: To appear in Europhys. Lett
การพัฒนาตำรับมาตรฐานทาร์ตตาแต็งพุทรา
Creators: name: บุญญาพร เชื่อมสมพงษ์
name: ผุสดี ขจรศักดิ์สิริกุล
name: วัธนาธร รสโหมด
name: สุพิชญา คำคม
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: ทาร์ตตาแต็ง,ตำรับมาตรฐาน,พุทรา

description: 2, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Determination of stellar parameters via state-of-the-art Non-LTE calculations
Creators: name: Li, Yangyang
name: Ezzeddine, Rana
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence, Spectroscopic analysis, Astronomical tool

description: Non Local Thermal Equilibrium (Non-LTE) stellar atmosphere models are the way forward to obtain accurate abundances, which is crucial for understanding of the history of stars, galaxies and the Universe as a whole. The fastest and most common methods to determine stellar abundances are based on the measurement of equivalent widths (EWs) or the computation of synthetic spectra of absorption lines of the chemical element in LTE calculation. However, due to the computational expense of Non-LTE computation of line formation, it is always difficult and intractable to apply such calculation towards a lot of stars without pre-calculated grids. Therefore, abundance inference based on EW data is very promising for Non-LTE chemical abundance determination. We present a robust multivariate interpolation tool to quantify the effect of dependencies between stellar parameters and constrain the errors of inferred abundance using Non-LTE correction. We also construct a Non-LTE EW-library for a larger grid for cool FGK stars. We utilized several global optimizers, such as differential evolution algorithms to obtain optimized stellar parameters. We also implemented a Bayesian framework to determine the uncertainties of optimized stellar parameters. Our preliminary results towards several metal-poor benchmark stars indicate consistent and well-constrained uncertainties. Finally we intend to make our set of tools publicly available for the community. This can make Non-LTE spectroscopic analysis to be easily implemented in large spectroscopic surveys.
description: {"references": ["Gustafsson et al. (2008)", "Carlsson et al. (1986)", "Creevey et al. (2014)", "Creevey et al. (2020)", "Worley et al. (2020)"]}
SUSY Ward identities for multi-gluon helicity amplitudes with massive quarks
Creators: name: Schwinn, Christian
name: Weinzierl, Stefan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use supersymmetric Ward identities to relate multi-gluon helicity amplitudes involving a pair of massive quarks to amplitudes with massive scalars. This allows to use the recent results for scalar amplitudes with an arbitrary number of gluons obtained by on-shell recursion relations to obtain scattering amplitudes involving top quarks.
description: 22 pages, references added
Σχεδιασμός προγράμματος παρέμβασης για την αναγνωστική κατανόηση και την παραγωγή γραπτού λόγου, για παιδιά με μαθησιακές δυσκολίες
Creators: name: Θεοδωρακοπούλου, Μαρία Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: αναγνωστική κατανόηση
μαθησιακές δυσκολίες
γραπτός λόγος
reading comprehension
learning difficulties
writing process

description: Η σχολική τάξη αποτελεί για τους μαθητές όλων των βαθμίδων ένα λεκτικό περιβάλλον στο οποίο καλούνται να διαχειριστούν τη συνεχή ροή των πληροφοριών που διακινείται. Καλούνται, επίσης, να μελετήσουν τα σχολικά εγχειρίδια και να αναπαράγουν τις πληροφορίες και τις γνώσεις που έλαβαν, όταν τους ζητηθεί. Σε τέτοιου τύπου δοκιμασίες, η κατανόηση και η γραφή αποτελούν τις σημαντικότερες διαδικασίες της σχολικής τάξης. Σ’αυτό το εκπαιδευτικό πλαίσιο, οι μαθητές που παρουσιάζουν δυσκολίες στη μάθησή τους, βρίσκονται σε δυσμενή θέση, εξαιτίας της αδυναμίας τους να ανταποκριθούν στις απαιτήσεις των γνωστικών και γλωσσικών διαδικασιών, της κατανόησης και της γραφής. Ακόμη κι αν διαθέτουν τη γνώση του αντικειμένου, βιώνουν συχνά τη σχολική αποτυχία, αφού βρίσκονται σε αδυναμία να τη δηλώσουν είτε γραπτά είτε προφορικά. Η παρούσα μελέτη διερεύνησε τρόπους βελτίωσης της αναγνωστικής κατανόησης και της παραγωγής γραπτού λόγου σε παιδιά με μαθησιακές δυσκολίες, μέσω στρατηγικών μάθησης. Τα αποτελέσματα απέδειξαν ότι η εφαρμογή ενός παιδαγωγικού προγράμματος παρέμβασης στην κατανόηση της ανάγνωσης κειμένου και στην παραγωγή γραπτού λόγου, με βάση το μαθησιακό προφίλ των μαθητών και τη χρήση γνωστικών και μεταγνωστικών στρατηγικών, μπορεί να οδηγήσει στη βελτίωση της επίδοσης των παιδιών σε αυτούς τους τομείς.
description: The classroom is for students of all levels a verbal environment in which they are asked to manage a constant flow of information. They are also expected to study textbooks and reproduce the information and knowledge they received, when requested. In such cases, reading comprehension and writing are the most important processes in the classroom. In this educational context, students who have difficulties in learning are at a disadvantage because of their inability to meet the requirements of the cognitive and language processes, comprehension and writing. Even if they have knowledge of the subject, they often experience school failure, as they are unable to express such knowledge in writing or orally. This study investigates ways to improve the reading comprehension and writing skills of children with learning difficulties, through learning strategies. The results showed that the application of a pedagogical-intervention program in reading comprehension and writing, based on students’ learning profile and the use of cognitive and metacognitive strategies can lead to children’s improvement in the abovementioned areas.
Unresolved multiple stars and Galactic clusters' mass estimates
Creators: name: Borodina, Olga I.
name: Carraro, Giovanni
name: Seleznev, Anton F.
name: Danilov, Vladimir M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: If not properly accounted for, unresolved binary stars can induce a bias in the photometric determination of star cluster masses inferred from star counts and the luminosity function. A correction factor close to 1.15 (for a binary fraction of 0.35) was found in \citep{Boro19}, which needs to be applied to blind photometric mass estimates. This value for the correction factor was found to be smaller than literature values. In an attempt to lift this discrepancy, in this work the focus is on higher order multiple stars with the goal of investigating the effect of triple and quadruple systems adopting the same methodology and data-set as in the quoted work. Then the result is found that when triple and quadruple together with binary systems are properly accounted for, the actual cluster mass (computed as all stars were single) should be incremented by a factor of 1.18$-$1.27, depending on the cluster and when the binary fraction $α$ is 0.35. Fitting formulae are provided to derive the increment factor for different binary star percentages.
description: 9 pages, 1 figure, in press in the Astrophysical Journal
การทดแทนไส้น้ำพริกเผาเสริมเนื้อปลาสลิดในผลิตภัณฑ์ปั้นขลิบทอด
Creators: name: ผุสดี ขจรศักดิ์สิริกุล
name: บุญญาพร เชื่อมสมพงษ์
name: วัธนาธร รสโหมด
name: สุพิชญา คำคม
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: เนื้อปลา,ปลาสลิด,ปั้นขลิบ,อาหารว่าง

description: 2, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Constraints on Post-Superflare Exo-Auroral Emission with SOAR and the Evryscope Fast Transient Engine
Creators: name: Glazier, Amy L.
name: Law, Nicholas M.
name: Corbett, Hank
name: Howard, Ward S.
name: Vasquez Soto, Alan
name: Gonzalez, Ramses
name: Galliher, Nathan W.
name: Ratzloff, Jeffrey K.
Publisher: name: Zenodo
Year: 2021
Subjects: superflares
M dwarfs
exoplanets
aurorae

description: High-energy particles from M-dwarf superflares--flares with energy \(\geq 10^{33}\) erg--can dramatically impact habitable-zone planets around these cool stars, with possible effects including the excitation of intense aurorae as particles interact with planetary atmospheres. Prior work has demonstrated that Earthlike atmospheres can produce excess emission in M-dwarf spectra, with the star/planet contrast ratio increasing by orders of magnitude in the green 5577-Å auroral line to levels potentially detectable by future surveys. The Evryscopes are gigapixel-scale telescope arrays at Mount Laguna Observatory and Cerro-Tololo Inter-American Observatory; coupled with the Evryscope Fast Transient Engine (EFTE), which scans Evryscope images in real time for transient phenomena, the systems have the unprecedented ability to identify superflares across the entire sky as they begin, enabling rapid spectroscopic follow-up. With the Evryscopes' all-sky coverage, far more--and far brighter--flares are observable than in surveys that focus on individual targets. Using the Goodman spectrograph on the 4.1-m SOAR telescope, we follow the spectroscopic evolution of M-dwarf superflares as they happen. Preliminary results include the strongest-yet upper limits to be placed on auroral emission in the atmospheres of Earthlike planets orbiting M-dwarf stars.
การเปลี่ยนแปลงคุณภาพจุลินทรีย์และคุณสมบัติทางกายภาพน้ำฝรั่งที่มีการล่าช้าในกระบวนการผลิต
Creators: name: ภัทรธิรา เตชะกำธรกิจ
name: พรรัตน์ สินชัยพานิช
name: รุ่งรัตน์ แจ่มจันทร์
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: เวลาล่าช้า,จำนวนจุลินทรีย์ทั้งหมด,สมบัติทางกายภาพ,น้ำฝรั่ง

description: 2, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
A mathematical theory of isolated systems in relativistic plasma physics
Creators: name: Calogero, Simone
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35B40, 35A05,35Q75

description: The existence and the properties of isolated solutions to the relativistic Vlasov-Maxwell system with initial data on the backward hyperboloid $t=-\sqrt{1+|x|^2}$ are investigated. Isolated solutions of Vlasov-Maxwell can be defined by the condition that the particle density is compactly supported on the initial hyperboloid and by imposing the absence of incoming radiation on the electromagnetic field. Various consequences of the mass-energy conservation laws are derived by assuming the existence of smooth isolated solutions which match the inital data. In particular, it is shown that the mass-energy of isolated solutions on the backward hyperboloids and on the surfaces of constant proper time are preserved and equal, while the mass-energy on the forward hyperboloids is non-increasing and uniformly bounded by the mass-energy on the initial hyperboloid. Moreover the global existence and uniqueness of classical solutions in the future of the initial surface is established for the one dimensional version of the system.
description: 30 pages, no figures
แนวคิดและมุมมองในการวิเคราะห์ยูสเคสโมเดล
Creators: name: บุญประเสริฐ สุรักษ์รัตนสกุล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: ยูสเคสโมเดล,ยูสเคส,ผู้กระทำการ,บทบรรยายยูสเคส

description: 2, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Molecular Biology of THE CELL
Creators: name: ทิวัตถ์ กุลชนะภควัต
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: Cell,Endoplasmic Rectilum,Protein Synthesis,Gene

description: 2, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
O Estado da Arte do Ensino Superior nas Ciências Farmacêuticas -  Desafios atuais e futuros
Creators: name: Cavadas, Claudia
Publisher: name: Zenodo
Year: 2023
Subjects: Ciências Farmacêuticas
Aprendizagem e ensino
Competências
Limitações
Learning Pharmacology
Pharmaceutical Sciences
Learning and teaching in Higher Education
Active learning
Minute paper
Clarification pauses
Jigsaw methodology
EdTech
Colaborative Concept Maps
Research Based Education
New learning spaces
Challenges of teaching with Virtual Assistents , as ChatGPT

description: Conferência por convite  apresentada do 22ª edição do Fórum Educacional, com o tema “O Papel da Pedagogia no Ensino e na Aprendizagem : Uma visão aplicada às Ciências Farmacêuticas", na sessão "O Estado da Arte do Ensino Superior nas Ciências Farmacêuticas" organizado pela Associação Portuguesa de Estudantes de Farmácia (APEF), e que decorreu  na Faculdade de Farmácia da Universidade de Coimbra nos dias 29 e 30 de abril.

In this conference I elaborate about the challenges and new trends of Teaching and learning in higher education, with focus on Pharmaceutical sciences.
Parameter Efficient Deep Neural Networks with Bilinear Projections
Creators: name: Yu, Litao
name: Gao, Yongsheng
name: Zhou, Jun
name: Zhang, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent research on deep neural networks (DNNs) has primarily focused on improving the model accuracy. Given a proper deep learning framework, it is generally possible to increase the depth or layer width to achieve a higher level of accuracy. However, the huge number of model parameters imposes more computational and memory usage overhead and leads to the parameter redundancy. In this paper, we address the parameter redundancy problem in DNNs by replacing conventional full projections with bilinear projections. For a fully-connected layer with $D$ input nodes and $D$ output nodes, applying bilinear projection can reduce the model space complexity from $\mathcal{O}(D^2)$ to $\mathcal{O}(2D)$, achieving a deep model with a sub-linear layer size. However, structured projection has a lower freedom of degree compared to the full projection, causing the under-fitting problem. So we simply scale up the mapping size by increasing the number of output channels, which can keep and even boosts the model accuracy. This makes it very parameter-efficient and handy to deploy such deep models on mobile systems with memory limitations. Experiments on four benchmark datasets show that applying the proposed bilinear projection to deep neural networks can achieve even higher accuracies than conventional full DNNs, while significantly reduces the model size.
Conformal invariance on orbifolds and excitations of singularity
Creators: name: Yin, Zheng
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study conformal field theory on two-dimensional orbifolds and show this to be an effective way to analyze physical effects of geometric singularities with angular deficits. They are closely related to boundaries and cross caps. Representatives classes of singularities can be described exactly using generalizations of boundary states. From this we compute correlation functions and derive the spectra of excitations localized at the singularities.
description: 11 pages, 2 figures
مشروع أتمتة التحكم بمحطات تخزين وتوزيع المواد البترولية
Creators: name: Dablo, Moataz
Publisher: name: Zenodo
Year: 2009
Subjects: SCADA
PLC
Tank Gauging Systems

description: لقد أصبحت أنظمة الأتمتة والتحكم والمراقبة تدخل في جميع مجالات حياتنا اليومية: في البيت وفي الطريق وفي المكتب الوظيفي وفي جميع المجالات الصناعية والزراعية والخدمية، فكان من البديهي انتشار تطبيقاتها في عمليات التخزين والتوزيع للمواد البترولية وخاصة بعد زيادة الطلب عليها بسبب ارتفاع السعر العالمي لهذه المواد بشكل خيالي في الفترة الأخيرة. يطبق في الكثير من دول العالم نظام الأتمتة المتكاملة بحيث يمكن كل إدارة أو شركة مستقلة تعمل في نظام تخزين وتوزيع المواد البترولية (نفط خام، مشتقات نفطية، غاز طبيعي أو غاز LPG, زيوت ........) أن تراقب وتأرشف وتتحكم من خلال مركز أو عدة مراكز تحكمية باستخدام أحدث الأنظمة التكنولوجية بجميع حقولها ومحطاتها ومراكز التوزيع المختلفة عبر شبكات اتصال (سلكية، لاسلكية، كابلات ألياف ضوئية، أقمار صناعية، إنترنيت.........) لتضع المحطات أو الخزانات تحت السيطرة ومراقبة حركة وخط سير الصهاريج بنظام الـــ GPS على الرغم من تباعدها الجغرافي عن بعضها البعض.
Support Vector Machine and YOLO for a Mobile Food Grading System
Creators: name: Zhu, Lili
name: Spachos, Petros
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Food quality and safety are of great concern to society since it is an essential guarantee not only for human health but also for social development, and stability. Ensuring food quality and safety is a complex process. All food processing stages should be considered, from cultivating, harvesting and storage to preparation and consumption. Grading is one of the essential processes to control food quality. This paper proposed a mobile visual-based system to evaluate food grading. Specifically, the proposed system acquires images of bananas when they are on moving conveyors. A two-layer image processing system based on machine learning is used to grade bananas, and these two layers are allocated on edge devices and cloud servers, respectively. Support Vector Machine (SVM) is the first layer to classify bananas based on an extracted feature vector composed of color and texture features. Then, the a You Only Look Once (YOLO) v3 model further locating the peel's defected area and determining if the inputs belong to the mid-ripened or well-ripened class. According to experimental results, the first layer's performance achieved an accuracy of 98.5% while the accuracy of the second layer is 85.7%, and the overall accuracy is 96.4%.
Magnetic coupling in CoCr_2O_4 and MnCr_2O_4: an LSDA+U study
Creators: name: Ederer, Claude
name: Komelj, Matej
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a first principles LSDA+U study of the magnetic coupling constants in the spinel magnets CoCr_2O_4 and MnCr_2O_4. Our calculated coupling constants highlight the possible importance of AA interactions in spinel systems with magnetic ions on both A and B sites. Furthermore, we show that a careful analysis of the dependence of the magnetic coupling constants on the LSDA+U parameters provides valuable insights in the underlying coupling mechanisms, and allows to obtain a quantitative estimate of the magnetic coupling constants. We discuss in detail the capabilities and possible pitfalls of the LSDA+U method in determining magnetic coupling constants in complex transition metal oxides.
description: 10 pages, 3 figures; final version; revised discussion of J dependence
Longitudinal instabilities of bunched beams caused by short-range wake fields
Creators: name: Dʹyachkov, Mikhail
Publisher: name: University of British Columbia
Year: 2009

description: This thesis investigates the effects of short-range wake fields on the collective longitudinal motion of charged particle bunches in circular accelerators, especially the onset of instability. At high intensity, a short-range wake field can distort the bunch potential well and thereby change the stationary distribution. It is shown that if this is not taken into account, instability thresholds will be incorrectly predicted. An integral equation derived from the linearized Vlasov equation is used to find the instability thresholds in the case of space-charge impedance alone for various distribution functions. The thresholds for instability caused by the coupling between the m = ±1 azimuthal modes have been obtained analytically for several common distributions. The criterion determining these thresholds appears to be the same as that for thresholds beyond which no stationary distribution can be found. A numerical method is also used to solve the linearized Vlasov equation for the self-consistent case, including distortion of the stationary distribution, and to find the thresholds. Physical explanations are provided for the eigenmodes and instability thresholds predicted by this method. This results in a much simpler stability criterion, which depends only on the stationary distribution and does not require solution of the linearized Vlasov equation. The behaviour of electron bunches beyond the instability threshold has also been studied using multiparticle tracking. Some interesting phenomena have been seen when the bunch length is smaller than that of the wake field. Under some conditions the bunch length oscillates in sawtooth fashion, i.e. slow relaxation is followed by fast blow-up. It has also been found that the bunch may split into two equal sub-bunches which oscillate around each other in binary star fashion. These effects may explain some recent observations in electron storage rings at SLAC and CERN.
Anomalous thermodynamics of Coulomb interacting massless Dirac fermions in two spatial dimensions
Creators: name: Vafek, Oskar
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It is argued that the specific heat of $N$ massless Dirac fermions in 2 spatial dimensions interacting with 1/r Coulomb interactions is suppressed logarithmically relative to its non-interacting counterpart. The (dimensionless) coefficient of the logarithm is calculated analytically in the leading order in large $N$ expansion, but to all orders in $e^2N$, a procedure which takes into account finite temperature screening. Experimental observation of this effect is expected to occur in a single layer graphene embedded in a dielectric medium. Its dependence on the dielectric constant is calculated analytically.
description: 4 pages, 2 figures (replaced with revised version)
Καθορισμός της βοτανικής προέλευσης μιγμάτων θυμαρίσιου μελιού με μέλι καστανιάς και ευκαλύπτου βάσει μικροσκοπικών, οργανοληπτικών και φυσικοχημικών χαρακτηριστικών.
Creators: name: Ροδοπούλου, Μαρία-Αννα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Βοτανική προέλευση
Αμιγή μέλια
Θυμαρίσιο μέλι
Botanical origin
Unifloral honeys
Thyme honey

description: Η παρούσα μελέτη αφορά την αντιμετώπιση των δυσκολιών που εμφανίζονται κατά το χαρακτηρισμό της βοτανικής προέλευσης του θυμαρίσιου μελιού όταν αυτό βρίσκεται σε μίγματα με μέλι καστανιάς και ευκαλύπτου, τα οποία προέρχονται από φυτά με “υπεράριθμη γύρη”. Σκοπός της μελέτης ήταν η ανάλυση και ο προσδιορισμός μικροσκοπικών, φυσικοχημικών και οργανοληπτικών χαρακτηριστικών μιγμάτων μελιών θυμαρίσιου μελιού με μέλια καστανιάς και ευκαλύπτου, καθώς επίσης και η εύρεση του σημείου μέχρι το οποίο το μίγμα μπορεί να θεωρείται ως «αμιγές θυμαρίσιο μέλι» με βάση το συνδυασμό των χαρακτηριστικών αυτών. Θυμαρίσια μέλια με διαφορετική περιεκτικότητα σε γυρεόκοκκους θυμαριού αναμίχθηκαν με μέλι καστανιάς και ευκαλύπτου σε διαφορετικές αναλογίες. Τα μίγματα που προέκυψαν αναλύθηκαν για τον προσδιορισμό των γυρεοσκοπικών και των οργανοληπτικών χαρακτηριστικών, των φυσικοχημικών παραμέτρων υγρασία, ηλεκτρική αγωγιμότητα, χρώμα, καθώς και των πτητικών συστατικών των μιγμάτων. Ακολούθησε επεξεργασία των αποτελεσμάτων και εντοπίστηκαν οι παράμετροι που επιδέχονται την μεγαλύτερη επίδραση κατά την ανάμιξη.
description: The identification of the botanical origin of honey results from the combination of microscopic, organoleptic and physicochemical parameters. This work describes the problems that may appear in the identification of the botanical origin of thyme honeys, when they are mixed with chestnut and eucalyptus honeys, which come from plants with over-represented pollen. The scope of this study was to investigate the microscopic, organoleptic and some physicochemical parameters that are affected after the mix of honey with over-represented pollen in different analogies with thyme honey; and to define according to these parameters of the mixtures, the analogy until which the blend could be characterized as unifloral thyme honey. In particular, thyme honeys with different percentages of thyme pollen grains were mixed with chestnut and eucalyptus honeys in different ratios. The microscopic parameters, the organoleptic characteristics and the physicochemical parameters moisture, electrical conductivity, colour as well as the volatile organic compounds of chestnut and eucalyptus honeys of the blends were analysed. The process of the results and the determination of the parameters that are more influenced after the mixing were followed
title: A marae-based approach to climate-change adaptation: Te Kowhai , Naumai and Parirau Marae, Ruawai, Te Tai Tokerau Northland Region
Creators: name: Hita, B.
name: Nathan, R.
name: Retimana, T.
name: Toka, H.
name: Le Gros, G.
name: Hammon, J.
name: Bradshaw, Diane
name: Olsen, G.
name: Dumaru, Patrina
Publisher: name: GNS Science
publisherIdentifier: https://ror.org/03vaqfv64
publisherIdentifierScheme: ROR
Year: 2024

description: This report describes the process and outcomes of a marae-based climate adaptation hui initiated by Te Ara Huringa Ahuarangi Mo Te Taiao (TAHA) in the flood-prone Ruawai Flats on the eastern coast of Kaipara District, Te Tai Tokerau Northland. TAHA is a tangata whenua adaptation coordination group of the three marae Naumai, Parirau and Kowhai that experience the impacts of flooding and intensifying risks from climate change. TAHA was formed in March 2022, with the initial support of Kaipara District Council, to incorporate tangata whenua perspectives into assessment of climate risks and identification of adaptation options. Observing tikanga, the hui approached adaptation as a process that would improve marae resilience and wellbeing in a changing climate. The first hui was conducted at Naumai Marae in August 2023 to gather the views and concerns of whanau regarding wahi tapu and the impacts of flooding to the Ruawai valley. The second hui, conducted at Parirau Marae in October 2023, involved korero about the risks of floods to elements whanau considered to be important to wellbeing. The final hui was facilitated by Te Kowhai Roading and the Urupa; Committee in February 2024 and involved korero on matauranga and engineering consideration for adaptation actions in reducing identified climate risks (to wellbeing) and improving resilience. The hui korero outcomes were synthesised to consolidate three key adaptation strategies for the three marae, which are to: 1. Assist in developing skills and capabilities of tangata whenua in sustainable-materials roading-drainage civil-engineering courses. 2. Aid in incorporating health and safety measures into marae emergency and disaster-management plans. 3. Apply the adaptation process with a focus on wellbeing that includes the development and operationalisation of a climate resilience and wellbeing monitoring and evaluation plan and indicators. The implementation of these strategies will be led by Te Uri o Hau, and the marae adaptation process will be facilitated with other marae within the rohe. (auth
Pentaquark state in pole-dominated QCD sum rules
Creators: name: Kojo, Toru
name: Hayashigaki, Arata
name: Jido, Daisuke
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a new approach in QCD sum rules applied for exotic hadrons with a number of quarks, exemplifying the pentaquark Theta^{+} (I=0,J=1/2) in the Borel sum rule. Our approach enables reliable extraction of the pentaquark properties from the sum rule with good stability in a remarkably wide Borel window. The appearance of its valid window originates from a favorable setup of the correlation functions with the aid of it chirality of the interpolating fields on the analogy of the Weinberg sum rule for the vector currents. Our setup leads to large suppression of the continuum contributions which have spoiled the Borel stability in the previous analyses, and consequently enhances importance of the higher-dimensional contributions of the OPE, which are indispensable for investigating the pentaquark properties. Implementing the OPE analysis up to dimension 15, we find that the sum rules for the chiral-even and odd parts independently give the Theta^{+} mass of 1.68 pm 0.22 GeV with uncertainties of the condensate values. Our sum rule indeed gives rather flat Borel curves almost independent of the continuum thresholds both for the mass and pole residue. Finally, we also discuss possible isolation of the observed states from the KN scattering state on view of chiral symmetry.
description: 8 pages, 7 figures
Optical multilayers with diamond-like thin films
Creators: name: Clarke, Glenn Andrew
Publisher: name: University of British Columbia
Year: 2009

description: A series of studies were performed to aid in the development of a magnetron sputter system which would have the ability to deposit protective optical multilayers for operation in the infrared. Diamond-like carbon was to be used as the top protective layer, while germanium carbide was chosen for the underlying layers due to its tunable refractive index. The microstructural, optical, mechanical and electrical properties of the diamond-like carbon films were investigated as a function of argon sputter gas pressure, substrate bias and reactive gas partial pressure (H₂, O₂, and N₂). The films were characterized by spectroscopic ellipsometry, scanning and transmission microscopy, electron diffraction, resistivity and hardness measurements, along with infrared spectroscopy. It was found that the pseudo-bandgap and JR transparency increased with an increase in the sputter gas pressure, along with a decrease in the hardness. This appeared to be, in part, due to an increase in the amount of hydrogen incorporation and the development of a polymer phase in the film matrix. It was felt that the primary source of hydrogen was outgassing from surfaces inside the vacuum deposition chamber. Increasing the substrate bias resulted in an increase in the film density only. The optimum diamond-like films were deposited at low sputter gas pressures (1 Pa). A widening of the pseudo-bandgap was observed for an increase in the H₂ partial pressure up to a value of 0.1 Pa. The films deposited in a nitrogen/argon mix exhibited up to an order of magnitude increase in the deposition rate over the films deposited in pure argon. The optical properties of these materials were intermediate to those for the hydrogenated and unhydrogenated films. Germanium and carbon multilayers were deposited to determine if interdiffusion between the individual layers would result in germanium carbide. The purpose of this investigation was to attempt to overcome the limitations on the carbon alloy fraction in conventional sputter techniques due to a poisoning of the germanium target from the hydrocarbon gas. The optical and microstructural properties of the multilayers were studied as a function of pressure and substrate bias through in-situ ellipsometry. It was found that a good deal of interdiffusion occurs at higher pressures (2 Pa) but at the cost of an increase in the film porosity. A novel control system was developed by monitoring the film growth through in-situ ellipsometry. This routine has the capability to determine both the thickness and the optical constants of the individual layers in a multilayer stack. A Fabry-Perot filter consisting of 21 quarter-wave layers was deposited with a peak transmission of 65 %. It is shown how this routine can be extended to optically absorbing materials such as carbon.
New insights on the massive interacting binary UU Cassiopeiae
Creators: name: Mennickent, R. E.
name: Djurašević, G.
name: Vince, I.
name: Garcés, J.
name: Hadrava, P.
name: Cabezas, M.
name: Petrović, J.
name: Jurkovic, M. I.
name: Korčáková, D.
name: Markov, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of the study of the close binary UU Cassiopeiae based on previously published multi wavelength photometric and spectroscopic data. Based on eclipse timings of the last 117 years, we find an improved orbital period of $\rm P_{o} = 8.519296(8)$ d. In addition, we find a long cycle of length $T$ $\sim$ 270 d in the $I_c$-band data. There is no evidence for orbital period change during the last century, suggesting that the rate of mass loss from the system or mass exchange between the stars should be small. Sporadic and rapid brightness drops of up to $Δ$$V$ = 0.3 mag are detected during the whole orbital cycle and infrared photometry clearly suggests the presence of circumstellar matter. We model the orbital light curve of 11 published datasets fixing the mass ratio and cool star temperature from previous spectroscopic work; $q$= 0.52 and $T_c$= 22 700 K. We find a system seen at angle 74 degrees with a stellar separation of 52 ${\rm R_{\odot}}$, a temperature for the hotter star $T_h$= 30 200 $K$ and stellar masses 17.4 and 9 ${\rm M_{\odot}}$ , radii 7.0 and 16.9 ${\rm R_{\odot}}$ and surface gravities log g = 3.98 and 2.94, for the hotter and cooler star, respectively. We find an accretion disk surrounding the more massive star, with a radius of 21 ${\rm R_{\odot}}$ and vertical thickness in its outer edge of 6.5 ${\rm R_{\odot}}$, mostly occulting the hotter star. Two active regions hotter than the surrounding disk are found, one located roughly in the expected position where the stream impacts the disk and the other one in the opposite side of the disk. Changes are observed in parameters of the disk and spots in different datasets.
description: Accepted for publication in Astronomy and Astrophysics, 10 pages, 11 figures
The Relative Emission from Chromospheres and Coronae: Dependence on Spectral Type and Age
Creators: name: Linsky, Jeffrey
name: Wood, Brian E.
name: Youngblood, Allison
name: Brown, Alexander
name: Froning, Cynthia S.
name: France, Kevin
name: Buccino, Andrea P.
name: Cranmer, Steven S.
name: Mauas, Pablo
name: Miguel, Yamila
name: Pineda, J. Sebastian
name: Rugheimer, Sarah
name: Vieytes, Mariela
name: Wheatley, Peter J.
name: Wilson, David J.
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
Chromospheres
Coronae
Magnetic heating

description: We present a comprehensive picture of the relative emission and heating of the chromospheres and coronae of stars with spectral types F2 - M7.5 V as a function of effective temperature and age. At chromospheric temperatures the dominant emission is in the Lyman-alpha line, which we take as representative of the total emission from chromospheres. At coronal temperatures the dominant emission is by X-rays, which we take a representative of the total emission from coronae. We include in this study 79 dwarf stars for which there are X-ray fluxes and Lyman-alpha fluxes corrected for interstellar absorption. The Lyman-alpha fluxes are from HST/STIS spectra obtained with the MUSCLES, Mega-MUSCLES, and other surveys and programs. The X-ray fluxes are from XMM-Newton, Chandra, and ROSAT. We find that Lyman-alpha and X-ray fluxes for F, G, and K stars lie on the same trend line with active stars near the top and inactive stars near the bottom. As stars evolve, they systematically descend the trend line. M stars depart from the FGK trend line in the sense of relatively weak Lyman-alpha emission. The ratio of the Lyman-alpha to bolometric luminosity, L(Lya)/L(bol), increases to lower effective temperature for stars at all ages. The ratio of X-ray to bolometric luminosity, L(X)/L(bol), follows a different pattern with young stars (t<450 Myr) showing X-ray saturation for effective temperatures less than 5200 K and stronger L(X)/L(bol) than L(Lya/L(bol). For older stars (t>4 Gyr), L(Lya)/L(bol) exceeds L(X)/L(bol), but L(X)/L(bol) increases to lower effective temperatures much faster than L(Lya)/L(bol). We discuss the implications of these results concerning the relative heating rates at coronal and chromospheric temperatures. This work is supported by grants from the Space Telescope Science Institute for programs HST-GO-12475, 12596, 13650, 14640, and 15071.
Έρευνα δηλωμένων προτιμήσεων για την υλοποίηση Ζώνης Χαμηλών Εκπομπών Ρύπων στη Θεσσαλονίκη
Creators: name: Σφενδόνης, Νικόλαος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Ζώνη χαμηλών εκπομπών ρύπων
Έρευνα δηλωμένων προτιμήσεων
Low emission zone
Stated preferences

description: Η παρούσα Διπλωματική Εργασία με θέμα «Έρευνα δηλωμένων προτιμήσεων για την υλοποίηση Ζώνης Χαμηλών Εκπομπών Ρύπων στη Θεσσαλονίκη» αφορά στη διερεύνηση της αποδοχής υλοποίησης μιας Ζώνης Χαμηλών Εκπομπών Ρύπων (Low Emission Zone – LEZ) στην πόλη της Θεσσαλονίκης από την πλευρά των πολιτών, λαμβάνοντας υπόψιν τη διεθνή εμπειρία. Στο 1ο εισαγωγικό κεφάλαιο αναλύεται ο στόχος της Διπλωματικής Εργασίας καθώς και η μεθοδολογία που ακολουθήθηκε. Το 2ο κεφάλαιο της Διπλωματικής Εργασίας αφορά στην παρουσίαση των Ζωνών Χαμηλών Εκπομπών Ρύπων διεθνώς και στα κύρια χαρακτηριστικά τους. Περιγράφονται αναλυτικά περιπτώσεις που έχουν εφαρμοστεί οι ζώνες αυτές. Ακολουθεί στο 3ο κεφάλαιο η περιγραφή της περιοχής μελέτης υλοποίησης της ζώνης στη Θεσσαλονίκη καθώς και ο σχεδιασμός και η υλοποίηση της έρευνας ερωτηματολογίου. Συγκεκριμένα, καθορίζεται η περιοχή μελέτης, και παρουσιάζονται τα αφορώντα στον σχεδιασμό του ερωτηματολογίου, στην πιλοτική έρευνα, και στην τελική έρευνα ερωτηματολογίου. Η ανάλυση πραγματοποιείται στο 4ο κεφάλαιο της Διπλωματικής Εργασίας, και τα αποτελέσματα της παρουσιάζονται με τη βοήθεια γραφικών αναπαραστάσεων. Ταυτόχρονα, γίνεται συγκριτική ανάλυση των αποτελεσμάτων της παρούσας έρευνας με την αντίστοιχη έρευνα ερωτηματολογίου των Κλαδιά – Κουβάτα για την πόλη του Βόλου, που εκπονήθηκε στο πλαίσιο της Διπλωματικής Εργασίας τους στο Τμήμα Αγρονομων και Τοπογράφων Μηχανικών του ΑΠ.Θ. Τα αποτελέσματα της ανάλυσης αξιοποιούνται για την εξαγωγή συμπερασμάτων, στο κεφάλαιο 5, και τη διαμόφωση προτάσεων υλοποίησης μιας Ζώνης Χαμηλών Εκπομπών Ρύπων στη Θεσσαλονίκη.
description: The present Postgraduate Thesis entitled “Stated preference research for the implementation of a Low Emission Zone in Thessaloniki” concerns the investigation of the level of approval of a LEZ from the citizens’ point of view taking into account the international experience. The 1st chapter includes the analysis of the objective and methodology. The 2nd chapter concerns the presentation of the main characteristics of Low Emission Zones at international level. This chapter also includes the presentation of case studies. The 3rd chapter refers to the presentation of the study area , the design of the questionnaire, the pilot survey a well as the final questionnaire – based survey. Analysis is included in the 4th chapter, where with the aid of graphical representations the results of the analysis are presented. A comparative analysis is also made taking into account the respective results of the research made by Kladias and Kouvatas for the city of Volos which was done in the framework of their Diploma Thesis in the Faculty of Rural and Surveying Engineering of A.U.Th. Finally, the results of the analysis are used for the formation of conclusion and proposals in the 5th chapter.