cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimized Effective Potential Method in Current-Spin Density Functional Theory
Creators: name: Pittalis, S.
name: Kurth, S.
name: Helbig, N.
name: Gross, E. K. U.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Current-spin density functional theory (CSDFT) provides a framework to describe interacting many-electron systems in a magnetic field which couples to both spin- and orbital-degrees of freedom. Unlike in usual (spin-) density functional theory, approximations to the exchange-correlation energy based on the model of the uniform electron gas face problems in practical applications. In this work, explicitly orbital-dependent functionals are used and a generalization of the Optimized Effective Potential (OEP) method to the CSDFT framework is presented. A simplifying approximation to the resulting integral equations for the exchange-correlation potentials is suggested. A detailed analysis of these equations is carried out for the case of open-shell atoms and numerical results are given using the exact-exchange energy functional. For zero external magnetic field, a small systematic lowering of the total energy for current-carrying states is observed due to the inclusion of the current in the Kohn-Sham scheme. For states without current, CSDFT results coincide with those of spin density functional theory.
description: 11 pages, 3 figures
Optimization under Uncertainty of a Chain of Nonlinear Resonators using a Field Representation
Creators: name: Ahmadisoleymani, Seyed Saeed
name: Missoum, Samy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Applied Physics (physics.app-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Chains of resonators in the form of spring-mass systems have long been known to exhibiting interesting properties such as band gaps. Such features can be leveraged to manipulate the propagation of waves such as the filtering of specific frequencies and, more generally, mitigate vibrations and impact. Adding nonlinearities to the system can also provide further avenues to manipulate the propagation of waves in the chain and enhance its performance. This work proposes to optimally design such a chain of resonators to mitigate vibrations in a robust manner by accounting for various sources of design uncertainties (e.g., nonlinear stiffness) and aleatory uncertainties (e.g., loading). The stochastic optimization algorithm is tailored to account for discontinuities in the chain response due to the presence of nonlinearities. In addition, a field formulation is used to define the properties of the resonators along the chain and reduce the dimensionality of the optimization problem. It is shown that the combination of the stochastic optimization algorithm and the field representation leads to robust designs that could not be achieved with optimal properties constant over the chain.
description: 25 figures, 24 pages, submitted to the Journal of Applied Mathematical Modelling
Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition
Creators: name: Terashima, Hiroaki
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is shown that a large class of weak disturbances on macroscopic quantum superpositions can be canceled by a probabilistic reversing operation on the system. We illustrate this for spin systems undergoing an Ising-type interaction with the environment and demonstrate that both the fidelity to the original state and the purity of the amended state can simultaneously be increased by the reversing operation. A possible experimental scheme to implement our scheme is discussed.
description: 21 pages, 2 figures
Excited $K$ meson, $K_c(4180)$, with hidden charm as a $D\bar{D}K$ bound state
Creators: name: Wu, Tian-Wei
name: Liu, Ming-Zhu
name: Geng, Li-Sheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Motivated by the recent discovery of two new states in the $B^+\rightarrow D^+D^-K^+$ decay by the LHCb Collaboration, we study the $D\bar{D}K$ three-body system by solving the Schrödinger equation with the Gaussian Expansion Method. We show that the $D\bar{D}K$ system can bind with quantum numbers $I(J^P)=\frac{1}{2}(0^-)$ and a binding energy of $B_3(D\bar{D}K)=48.9^{+1.4}_{-2.4}$ MeV. It can decay into $J/ψK$ and $D_s\bar{D}^*$ via triangle diagrams, yielding a partial decay width of about 1 MeV. As a result, if discovered, it will serve as a highly nontrivial check on the nature of the many exotic hadrons discovered so far and on non-perturbative QCD as well. Assuming heavy quark spin symmetry, the same formalism is applied to study the $D\bar{D}^*K$ system, which is shown to also bind with quantum numbers $I(J^P)=\frac{1}{2}(1^-)$ and a binding energy of $B_3(D\bar{D}^*K)\simeq 77.3^{+3.1}_{-6.6}$ MeV, consistent with the results of previous works.
description: 6 pages, 3 figures
Bridging contributor's knowledge and the technology of The Turing Way, an open guide for data science
Creators: name: Madge, Jim
Publisher: name: Zenodo
Year: 2024

description: A lightning talk, giving a personal perspective on enabling contributors in The Turing Way.Presented at the Open Research devroom at FOSDEM24.

Conference page and recording

Abstract

The Turing Way is a handbook for reproducible, ethical and collaborative data science.The book is a collaborative effort; over 470 contributors from many, diverse backgrounds share their wisdom in its pages.The size of the community means that not everyone will share the same technical skills, preferred tools, or ways of working.The book is built from Markdown source files using JupyterBook and work is largely coordinated on GitHub.We want to maintain and promote the benefits of version control, plain text and open working.However, this can clash with the experience and expectations of collaborators, raising the barrier to contribution and potentially making people feel unwelcome.

I will talk from my perspective as an RSE and co-lead of The Turing Way's infrastructure working group about lessons in bridging the knowledge of our community and the technology of how the book is produced.
Διερεύνηση των προβλημάτων που δημιουργούνται από τη χρήση πλοίων μεγάλου μεγέθους μεταφοράς containers, στις λιμενικές εγκαταστάσεις
Creators: name: Κλαδιάς, Ευγένιος Παντελή
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Πλοία
Εμπορευματοκιβώτια
Λιμάνια
Ships
Containers
Ports

description: Στην παρούσα διπλωματική εργασία μελετάται το σύνολο των προβλημάτων που δημιουργούνται στις λιμενικές εγκαταστάσεις λόγω της χρήσης πλοίων μεταφοράς εμπορευματοκιβωτίων μεγάλου μεγέθους. Αρχικά, πραγματοποιείται μία επισκόπηση των στοιχείων που αφορούν τα εμπορευματοκιβώτια, όπως τα στατιστικά τους και η διαχρονική εξέλιξη της διακίνησής τους, τα κυριότερα λιμάνια και θαλάσσιοι εμπορικοί δρόμοι, καθώς και η οικονομική δραστηριότητα της ναυτιλιακής βιομηχανίας. Αργότερα, εξετάζονται χαρακτηριστικά των πλοίων μεταφοράς εμπορευματοκιβωτίων, ενώ ακολουθεί ο σχολιασμός των κυριότερων προβλημάτων που δημιουργούνται στις εγκαταστάσεις των λιμανιών από τη χρήση των μεγάλων πλοίων μεταφοράς εμπορευματοκιβωτίων ανά στοιχείο της λιμενικής υποδομής. Παράλληλα εξετάζεται η συμφόρηση που δημιουργείται στις λιμενικές εγκαταστάσεις και ο παράγοντας της εργασίας στα λιμάνια. Τέλος, γίνεται μία αναφορά στα εξωτερικά κόστη και τις συνέπειες της συμφόρησης που προκαλούνται από τη χρήση των πλοίων μεγάλου μεγέθους στα λιμάνια, ενώ παρατίθενται και κάποιες λύσεις στα παραπάνω προβλήματα. Ο στόχος, λοιπόν, της παρούσας διπλωματικής εργασίας, είναι η διερεύνηση και ο προσδιορισμός των κυριότερων προβλημάτων που προκαλούν τα πλοία μεγάλου μεγέθους μεταφοράς εμπορευματοκιβωτίων στις εγκαταστάσεις των λιμανιών, καθώς με το μέγεθος των τελευταίων να συνεχίζεται να αυξάνεται, τα προβλήματα αυτά θα γίνουν όλο και πιο έντονα, με την αντιμετώπισή τους να αποτελεί πρόβλημα τόσο για τα λιμάνια που θα υποδέχονται τα μεγάλα πλοία όσο και τα υπόλοιπα.
description: The present thesis studies the problems that are caused at port facilities as a result of the arrival of big sized containerships. At first, there is an overview of all the elements of containers, such as the statistics and the developments in container trade, the most important container ports and trade routes, as well as the economic activity of the liner industry. Next, the characteristics of the containerships are examined, as well as an analysis of the main problems and challenges that big containerships cause at port facilities specifically per infrastructure element. Furthermore, the problems of port congestion and labor are examined. Finally, there a review of the externalities and the repercussions of the congestions at port facilities due to the arrival of mega containerships, as well as some solutions to the aforementioned problems. The aim of the present thesis, is to study and to define the main problems that the new mega containerships create at port facilities, because considering that the size of the ships will continue to grow, the problems will become even more intense and will affect not only the ports that will serve these mega containerships, but all the ports in the world.
Population Analysis with Wannier Orbitals
Creators: name: Kundu, Sudipta
name: Bhattacharjee, Satadeep
name: Lee, Seung-Cheol
name: Jain, Manish
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We formulate Wannier orbital overlap population and Wannier orbital Hamilton population to describe the contribution of different orbitals to electron distribution and their interactions. These methods, which are analogous to the well known crystal orbital overlap population and crystal orbital Hamilton population, provide insight into the distribution of electrons at various atom centres and their bonding nature. We apply this formalism in the context of a plane-wave density functional theory calculation. This method provides a means to connect the non-local plane-wave basis to a localised basis by projecting the wave functions from a plane-wave density functional theory calculation on to localized Wannier orbital basis. The main advantage of this formulation is that the spilling factor is strictly zero for insulators and can systematically be made small for metals. We use our proposed method to study and obtain bonding and electron localization insights in five different materials.
Radiation of Relativistic Particles for Quasiperiodic Motion in a Transparent Medium
Creators: name: Bellucci, S.
name: Maisheev, V. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The radiation of relativistic charged particles for the quasiperiodic motion in a transparent medium is considered. For motion of the general kind the differential probability of the process is obtained. For planar motion the spectral intensity of radiation is found. The different cases of radiation in the medium-filled undulators are studied. In particular, the influence of Cherenkov radiation on the undulator one is discussed.
description: 13 pages, 5 figures, PACS number: 41.60.-m
Διερεύνηση του φαινομένου της παραβίασης της κόκκινης ένδειξης του φωτεινού σηματοδότη (Red-Light Running) από οδηγούς σε διασταυρώσεις της Θεσσαλονίκης
Creators: name: Νικολαΐδης, Μιλτιάδης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Red-Light Running

description: Ο σκοπός της Μεταπτυχιακής Διπλωματικής Εργασίας ήταν η διερεύνηση του φαινομένου της παραβίασης της κόκκινης ένδειξης του φωτεινού σηματοδότη σε διασταυρώσεις στην πόλη της Θεσσαλονίκης. Η διερεύνηση αυτή στόχευε στην κατανόηση του φαινομένου, των παραγόντων που το καθορίζουν και στην εξαγωγή συμπερασμάτων που σχετίζονται με αυτό. Για το σκοπό αυτό πραγματοποιήθηκαν μετρήσεις σε 4 επιλεγμένες διασταυρώσεις. Αρχικά, μέσα από την βιβλιογραφική ανασκόπηση παρουσιάζεται το φαινόμενο της παραβίασης της κόκκινης ένδειξης του σηματοδότη που διεθνώς αποτελεί μία από τις σημαντικότερες αιτίες πρόκλησης οδικών ατυχημάτων. Στη συνέχεια παρουσιάζονται τα όσα αφορούν στον σχεδιασμό και υλοποίηση των μετρήσεων πεδίου. Η επεξεργασία των μετρήσεων έδειξε την υψηλή συχνότητα εμφάνισης του φαινομένου στις τέσσερις διασταυρώσεις την πόλης της Θεσσαλονίκη οι οποίες εξετάστηκαν. Τα αποτελέσματα της ανάλυσης κατηγοριοποιήθηκαν με βάση την χρονική περίοδο των παρατηρήσεων και με βάση το είδος της παραβίασης. Επιπλέον διερευνήθηκε η συσχέτιση του φαινομένου με τα δεδομένα του κυκλοφοριακού φόρτου που συλλέχτηκαν στο πεδίο και πραγματοποιήθηκε σύγκριση των αποτελεσμάτων με εκείνα μίας παλαιότερης αντίστοιχης έρευνας στην πόλη της Θεσσαλονίκης.
description: The scope of the present thesis is to research the red light running phenomenon at intersections in the city area of Thessaloniki. This research took place for the deeper understanding of the phenomenon, the circumstances that define it and the drawing of relative conclusions. For this purpose, on the spot observations were carried out at four selected intersections. To begin with, through literature review the red light running phenomenon is illustrated, standing as one of the main causes of road accidents worldwide. Moreover, information concerning the planning and realization of the field measurements are presented.Thereafter, results processing turned out high occurrence frequency of the phenomenon in the four studied intersection in the city area of Thessaloniki. Data analysis results were categorized based both on observation timing and on the nature of the violation. Furthermore, the correlation of the phenomenon with traffic volumes field data was analyzed, while the results were compared to those of a previous similar study.
Fatigue crack propagation in Al-Li alloy 8090 : environmental effects
Creators: name: Chen, Xiande
Publisher: name: University of British Columbia
Year: 2009

description: Fatigue crack propagation behaviour in Al-Li alloy 8090 plate were studied in four main testing environments: a relatively inert environment - desiccated air; and three freely corroding aqueous environments consisting of distilled water, 0.6 M NaCl and 1 M AlCl₃. It was found that the major role of the aqueous environments in the T-L orientation crack growth behaviour of the Al-Li alloy plate was to promote S-L splitting (delamination) at grain boundaries, with a subsequent effect on the stress state at the crack tip. The splitting preceded the main crack advance, and helped to keep the crack in the same macroscopic crack plane and restricted the fracture surface roughness, and consequently reduced crack closure effects. In contrast, the absence of the splitting effects in desiccated air, combined with the planar deformation features and the strong crystallographic texture of the Al-Li alloy plate, led to out-of-plane cracking and ridge formation in the mid-thickness of the specimen. This resulted in severe crack growth retardation and a crack growth rate plateau at ΔK values above ∼ 3 MPa.m[sub ½]. Analyses of the observations led to the conclusion that the S-L splitting phenomenon is associated with both localized anodic dissolution processes and hydrogen embrittlement effects. The effect of changing the loading frequency was not obvious, except in the dry air environment where decreasing the frequency from ∼80 to ∼0.5 Hz led to the disappearance of the crack growth rate plateau. The fatigue cracking resistance of the Al-Li alloy plate is superior in the dry air environment and slightly better or equivalent in the aqueous environments when compared to a conventional crack-tolerant Al-alloy plate, 2024-T35 1. The effects of a re-aging treatment on fatigue cracking in the S-L orientation of the Al-Li plate were also studied. The presence of aqueous environments also accelerated crack propagation in the S-L orientation, and crack propagation is faster in the S-L orientation than in the T-L orientation. The re-aging treatment was effective in increasing the short-transverse fracture toughness and also improved the intergranular corrosion resistance of the material. However, the re-aging treatment did not improve the corrosion fatigue crack propagation resistance.
Cross-Correlation Detection of Point Sources in WMAP First Year Data
Creators: name: Nie, Jian Yin
name: Zhang, Shuang Nan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We apply a Cross-correlation (CC) method developed previously for detecting gamma-ray point sources to the WMAP first year data by using the Point-Spread Function of WMAP and obtain a full sky CC coefficient map. Analyzing this map, we find that the CC method is a powerful tool to examine the WMAP foreground residuals which can be further cleaned accordingly. Evident foreground signals are found in WMAP foreground cleaned maps and Tegmark cleaned map. In this process 101 point-sources are detected, and 26 of them are new sources besides the originally listed WMAP 208 sources. We estimate the flux of these new sources and verify them by another method. As a result, a revised mask file based on the WMAP first year data is produced by including these new sources.
description: 14 pages, 10 figures; accepted for publication by ChJAA
ПРИНЦИПЫ И МЕТОДЫ В АСПЕКТЕ ИНТЕГРАТИВНОГО ОБУЧЕНИЯ.
Creators: name: Абдуллаева С.Х., Доктор философии по педагогическим наукам ( PhD), Ташкентский университет информационных технологий имени Мухаммада ал-Хоразмий
Publisher: name: Zenodo
Year: 2024

description: В статье рассмотрено  интегративное обучение в условиях технологизации образовательной системы,  где актуальность интеграции элементов разных концепций предложено реализовать первостепенно. Интеграция содержания обучения предполагает качественно новый подход и продукт с точки зрения осмысленности знаний и их трансформации на деятельность и результативность.

Ключевые слова – интегративность, методы, модель, принципы, функциональность, дидактический аспект, технологии, деятельностный подход, индивидуальный подход, компетенции.
Background Adaptive Faster R-CNN for Semi-Supervised Convolutional Object Detection of Threats in X-Ray Images
Creators: name: Sigman, John B.
name: Spell, Gregory P.
name: Liang, Kevin J
name: Carin, Lawrence
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recently, progress has been made in the supervised training of Convolutional Object Detectors (e.g. Faster R-CNN) for threat recognition in carry-on luggage using X-ray images. This is part of the Transportation Security Administration's (TSA's) mission to protect air travelers in the United States. While more training data with threats may reliably improve performance for this class of deep algorithm, it is expensive to stage in realistic contexts. By contrast, data from the real world can be collected quickly with minimal cost. In this paper, we present a semi-supervised approach for threat recognition which we call Background Adaptive Faster R-CNN. This approach is a training method for two-stage object detectors which uses Domain Adaptation methods from the field of deep learning. The data sources described earlier make two "domains": a hand-collected data domain of images with threats, and a real-world domain of images assumed without threats. Two domain discriminators, one for discriminating object proposals and one for image features, are adversarially trained to prevent encoding domain-specific information. Without this penalty a Convolutional Neural Network (CNN) can learn to identify domains based on superficial characteristics, and minimize a supervised loss function without improving its ability to recognize objects. For the hand-collected data, only object proposals and image features from backgrounds are used. The losses for these domain-adaptive discriminators are added to the Faster R-CNN losses of images from both domains. This can reduce threat detection false alarm rates by matching the statistics of extracted features from hand-collected backgrounds to real world data. Performance improvements are demonstrated on two independently-collected datasets of labeled threats.
Micrometer-scale monolayer SnS growth by physical vapor deposition
Creators: name: Kawamoto, H.
name: Higashitarumizu, N.
name: Nagamura, N.
name: Nakamura, M.
name: Shimamura, K.
name: Ohashi, N.
name: Nagashio, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recently, monolayer SnS, a two-dimensional group IV monochalcogenide, was grown on a mica substrate at the micrometer-size scale by the simple physical vapor deposition (PVD), resulting in the successful demonstration of its in-plane room temperature ferroelectricity. However, the reason behind the monolayer growth remains unclear because it had been considered that the SnS growth inevitably results in a multilayer thickness due to the strong interlayer interaction arising from lone pair electrons. Here, we investigate the PVD growth of monolayer SnS from two different feed powders, highly purified SnS and commercial phase-impure SnS. Contrary to expectations, it is suggested that the mica substrate surface is modified by sulfur evaporated from the Sn2S3 contaminant in the as-purchased powder and the lateral growth of monolayer SnS is facilitated due to the enhanced surface diffusion of SnS precursor molecules, unlike the growth from the highly purified powder. This insight provides a guide to identify further controllable growth conditions.
Decoherence and purity of a driven solid-state qubit in Ohmic bath
Creators: name: Li, Zhi-Qiang
name: Liang, Xian-Ting
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we study the decoherence and purity of a driven solid-state qubit in the Ohmic bath by using the method based on the master equation. At first, instead of solving the master equation we investigate the coefficients of the equation which describe the shift in frequency, diffusive, decoherence, and so on. It is shown that one of the coefficients (we called it decoherence coefficient) is crucial to the decoherence of the qubit in the model. Then we investigate the evolution of the purity of the state in the model. From the analysis of the purity we see that the decoherence time of the qubit decrease with the increase of the amplitude of the driven fields and it is increase with the increase of the frequency of the driven fields.
description: 9 pages, 8 figures
Full Thermalization of a Photonic Qubit
Creators: name: de Oliveira, A. G.
name: Gomes, R. M.
name: Brasil, V. C. C.
name: da Silva, N. Rubiano
name: Céleri, L. C.
name: Ribeiro, P. H. Souto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The generalized amplitude damping (GAD) quantum channel implements the interaction between a qubit and an environment with arbitrary temperature and arbitrary interaction time. Here, we implement a photonic version of the GAD for the case of infinite interaction time (full thermalization). We also show that this quantum channel works as a thermal bath with controlled temperature.
description: 5 pages, 3 figures
A Formulation of Noether's Theorem for Fractional Problems of the Calculus of Variations
Creators: name: Frederico, Gastao S. F.
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optimization and Control (math.OC)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 49K05; 26A33

description: Fractional (or non-integer) differentiation is an important concept both from theoretical and applicational points of view. The study of problems of the calculus of variations with fractional derivatives is a rather recent subject, the main result being the fractional necessary optimality condition of Euler-Lagrange obtained in 2002. Here we use the notion of Euler-Lagrange fractional extremal to prove a Noether-type theorem. For that we propose a generalization of the classical concept of conservation law, introducing an appropriate fractional operator.
description: Accepted for publication in the Journal of Mathematical Analysis and Applications
Diffuse Far-ultraviolet Observations of the Taurus Region
Creators: name: Lee, D. H.
name: Yuk, I. S.
name: Jin, H.
name: Seon, K. I.
name: Edelstein, J.
name: Korpela, E. J.
name: Adolfo, J.
name: Min, K. W.
name: Ryu, K. S.
name: Shinn, J. H.
name: van Dishoeck, E. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Diffuse far-ultraviolet (FUV: 1370-1670 A) flux from the Taurus molecular cloud region has been observed with the SPEAR/FIMS imaging spectrograph. An FUV continuum map of the Taurus region, similar to the visual extinction maps, shows a distinct cloud core and halo region. The dense cloud core, where the visual extinction is A_v > 1.5, obscures the background diffuse FUV radiation, while a scattered FUV radiation is seen in and beyond the halo region where A_v < 1.5. The total intensity of H2 fluorescence in the cloud halo is I_{H2} = 6.5 x 10^4 photons cm^{-2} s^{-1} sr^{-1} in the 1370-1670 A wavelength band. A synthetic model of the H2 fluorescent emission fits the present observation best with a hydrogen density n_H = 50 cm^{-3}, H2 column density N(H2) = 0.8 x 10^{20} cm^{-2}, and an incident FUV intensity I_{UV} = 0.2. H2 fluorescence is not seen in the core presumably because the required radiation flux to induce fluorescence is unable to penetrate the core region.
description: Accepted for ApJL, 4 pages, 3 figures
Development of Dynamic Local Area Network (LAN) Based Mock Board Examination System
Creators: name: Sancho, Charis Ann M.
name: Melendres, Uriel M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: D.2.0; D.2.1

description: Purpose-Mock board exam is necessary to identify if the students are ready to take the board exam. However, preparing for the examination is not easy. It takes too much time to release the result, given that the College has limited personnel. Thus, the proponents developed the Dynamic Local Area Network (LAN) Based Mock Board Examination System that makes the preparation and checking easy. Method-The proponents followed the iterative waterfall model to develop the system efficiently. Some criteria of ISO 25010 were adopted in the evaluation instrument. Simultaneously, evaluators are composed of program chairperson, College of Computer Studies (CCS) faculty, board program students, and alumni. Results-The result of 4.91 in Functional Suitability, 4.87 in Performance Efficiency, 4.91 in Usability, 4.90 in Security, and 4.92 in Maintainability shows that the system is fully functional and is usable by any board program. Conclusion The computer-based examination, implemented through LAN, can simplify administering personnel of MinSCAT mock board examination. The development of the "Dynamic LAN Based Mock Board Examination System" is a great help to the MinSCAT and their board program graduates if it is implemented. Recommendations-The system has hidden weaknesses that were only identified in actual operation. Thus, further testing is needed, like beta testing, to identify and correct it for better performance. After beta-testing, the system can be improved through iteration of the Waterfall Model phases. Research Implications-The developed system can improve the mock board examination process and ease preparing this significant examination. Moreover, it immediately provides a result that helps the examinees to identify their weaknesses and do a further review to master it.
description: 18 pages
An inner disk below the ADAF: the intermediate spectral state of black hole accretion
Creators: name: Liu, B. F.
name: Meyer, ; F.
name: Meyer-Hofmeister, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: The hard and soft spectral states of black hole accretion are understood as connected with ADAF accretion (truncated disk) and standard disk accretion, respectively. However, observations indicate the existence of cool gas in the inner region at times when the disk is already truncated outside. We try to shed light on these not yet understood intermediate states. Methods: The disk-corona model allows to understand the spectral state transitions as caused by changes of the mass flow rate in the disk and provides a picture for the accretion geometry when disk truncation starts at the time of the soft/hard transition, the formation of a gap in the disk filled by an advection-dominated flow (ADAF) at the distance where the evaporation is maximal. We study the interaction of such an ADAF with an inner thin disk below. Results: We show that, when the accretion rate is not far below the transition rate, an inner disk could exist below an ADAF, leading to an intermediate state of black hole accretion.
description: 4 pages, 1 figure. Accepted for publication in A&A Letters
Holography in Quark-Gluon Plasma and Neutron Stars
Creators: name: Nijs, Govert
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this thesis, QCD is studied from three different directions, with one overarching theme: holography. The holographic duality allows certain strongly coupled QFTs to be described in terms of much simpler classical gravity in one dimension more. The first direction from which QCD is studied in this thesis is by examining the effects of an external magnetic field on a particular holographic model of QCD, yielding interesting qualitative insight. The second approach examines how, in the same model, one can describe dense baryonic configurations, providing a new way to study the matter composing neutron stars. Indeed, the equation of state produced in this way is subsequently used to compute several neutron star properties which are observable, or will be in the near future. The last direction contains no holographic computations per se, but does incorporate several qualitative insights from holography into a new heavy ion code called Trajectum. This will in the near future be used to perform a Bayesian analysis, whereby it is hoped that these qualitative insights from holography can be tested on experimental data, to see how well the ideas coming from holography match up with experiment.
description: PhD Thesis, 202 pages, 49 figures, http://dspace.library.uu.nl/handle/1874/397298
Energetics of solar coronal mass ejections
Creators: name: Subramanian, Prasad
name: Vourlidas, Angelos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We investigate whether solar coronal mass ejections are driven mainly by coupling to the ambient solar wind or through the release of internal magnetic energy. Methods: We examine the energetics of 39 flux-rope like coronal mass ejections (CMEs) from the Sun using data in the distance range $\sim$ 2--20 $R_{\odot}$ from the Large Angle Spectroscopic Coronograph (LASCO) aboard the Solar and Heliospheric Observatory (SOHO). This comprises a complete sample of the best examples of flux-rope CMEs observed by LASCO in 1996-2001. Results: We find that 69% of the CMEs in our sample experience a clearly identifiable driving power in the LASCO field of view. For the CMEs that are driven, we examine if they might be deriving most of their driving power by coupling to the solar wind. We do not find conclusive evidence in favor of this hypothesis. On the other hand, we find that their internal magnetic energy is a viable source of the required driving power. We have estimated upper and lower limits on the power that can possibly be provided by the internal magnetic field of a CME. We find that, on average, the lower limit to the available magnetic power is around 74% of what is required to drive the CMEs, while the upper limit can be as much as an order of magnitude larger.
description: Accepted for publication in Astronomy and Astrophysics. Revised version matches version in print
НЕКОТОРЫЕ ВОПРОСЫ ТИПОЛОГИЧЕСКИХ  ОСОБЕННОСТЕЙ  ГРАММАТИКИ УЗБЕКСКОГО И РУССКОГО ЯЗЫКОВ.
Creators: name: Доспанова Д.У., к.ф.н, доцент Ташкентский университет информационных технологий имени Мухаммада Ал-Хоразмий
Publisher: name: Zenodo
Year: 2024

description: В статье рассматриваются некоторые морфологические особенности русского и узбекского языков, и сложности, возникающие у студентов  при изучении русского языка в технических  вузах.

Ключевые слова: флексии, словообразование, типология, морфология.
A kinetic model of the Peirce-Smith converter
Creators: name: Kyllo, Andrew Kevin
Publisher: name: University of British Columbia
Year: 2009

description: The Peirce-Smith converter, as used for copper and nickel converting, has changed little in the eighty years since its introduction. Over this time other metal production techniques have been developed, including considerable improvements to non-ferrous smelting. These improvements have had only a small effect on non-ferrous converting. The tenacity of the Peirce-Smith converter can be attributed to its simplicity of operation, however, it is not an efficient process. While the converter itself is limited primarily by its overall heat balance, process improvement has been limited by the belief that it operated at thermodynamic equilibrium. A kinetic model has been developed to gain a better knowledge of the operation of the Peirce-Smith converter. The model consists of two parts; a model of the gas flow in the bath, and an overall model considering both the heat and mass flows around the converter. The gas flow model calculates the bubble growth on the tuyere to detachment, and its subsequent rise through the bath. A combination of Kelvin-Helmolz and Rayleigh-Taylor instability theories is used to determine the stability of the bubble, both during growth and while rising through the bath. This allows the calculation of bubble breakup, which can be used to determine the total gas/liquid interfacial area. The gas flow model calculates the amount of oxygen reacting within each phase, as well as the heat lost to the gas and the total interfacial area. These values are applied to the overall model which then calculates the heat and mass balances within the converter. Material flows are based on mass-transfer considerations, with each phase being considered separately. Both mass and heat-transfer occur between all phases present, and each phase is assumed to be in internal equilibrium. As well as calculating the behaviour of the more abundant elements within the converter, the behaviour of the more important minor elements is considered. The model is validated using published physical modelling results, as well as measurements made on operating converters. The model results indicate that the efficiency of the Peirce-Smith converter may be improved by a number of methods, provided that some means of controlling the bath temperature is available. Increasing the tuyere submergence and decreasing the tuyere size are predicted to provide a substantial improvement in operation efficiency, without adversely affecting the minor element removal. The use of low levels of oxygen enrichment also improves efficiency, but tends to reduce the extent of minor element removal. Higher levels of oxygen enrichment are predicted to alter the overall process chemistry, with the amount of iron reacting being controlled by liquid-phase mass-transfer. This improves both the overall process efficiency and the extent of minor element removal.
Ο δικαστικός έλεγχος της συνδρομής των προϋποθέσεων των άρθρων 105 – 106 ΕισΝΑΚ στις περιπτώσεις ιατρικής αστικής ευθύνης των δημόσιων νοσοκομείων από το Δικαστήριο της αγωγής
Creators: name: Μασούρη, Μαρίνα Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ιατρική
Αστική
Ευθύνη
Medical
Liability
Judicial

description: Η παρούσα εργασία έχει ως αντικείμενο τον δικαστικό έλεγχο της συνδρομής των προϋποθέσεων των άρθρων 105 – 106 ΕισΝΑΚ στις περιπτώσεις ιατρικής αστικής ευθύνης των δημόσιων νοσοκομείων από το Δικαστήριο της αγωγής. Αποτελείται από δύο μέρη: Στο πρώτο μέρος αναφέρονται και αναλύονται οι προϋποθέσεις θεμελίωσης της αστικής ευθύνης και γίνεται ειδικότερη αναφορά στην προϋπόθεση της παρανομίας, ενώ στο δεύτερο μέρος εξετάζεται ο τρόπος με τον οποίο προσδιορίζεται η αποζημίωση που επιδικάζεται από το Δικαστήριο.
description: The work has been the object of judicial review of the conditions of Articles 105-106 Introductory act to the Civil Code where medical liability of public hospitals by the Court of lawsuit. It consists of twoparts:In the first part analyzes the conditions and foundation of civil liability and made specific reference to the condition of illegality, while the second part examines the way in which the compensation awarded by the Court determined.
Ethical Game Design and Emerging Player Awareness
Creators: name: Souza Silva, Jaconaazar
Publisher: name: Zenodo
Year: 2025
Subjects: Delta Force: Hawk Ops
Conscious game design
Hidden death counter
Kill/Death Ratio (K/D)
Ethical game mechanics
Subjective time in games
XChronos
Symbolic interface
Player presence
Game philosophy
FPS psychology
Game design ethics

description: This article explores the design choice in Delta Force: Hawk Ops to hide the player's death count during gameplay. Rather than treating it as a UI decision, the analysis proposes this feature as a symbolic shift in interactive software — a sign of emerging player-centered ethics and an interface that fosters presence over performance. Drawing on community reactions, philosophical insight, and parallels with the XChronos project (which redefines time as lived experience), this paper situates Delta Force's minimalist scoreboard as a meaningful gesture in the evolution of conscious game design.
Συγκριτική ανάλυση μεθόδων εκτίμησης εξατμισοδιαπνοής αναφοράς
Creators: name: Παγώνας, Κωνσταντίνος Περικλή
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εξατμισοδιαπνοή αναφοράς
Ανάλυση
Μέθοδοι
Reference evapotranspiration
Analysis
Methods

description: Στην παρούσα μεταπτυχιακή διατριβή έγινε συγκριτική ανάλυση των διαφόρων μεθόδων εκτίμησης της εξατμισοδιαπνοής αναφοράς. Πιο συγκεκριμένα έγινε χρήση και ανάλυση των μεθόδων : Τροποποιημένη μέθοδος Penman κατά FAO-24, FAO-56 Penman-Monteith, ASCE-standardized Penman-Monteith, Hargreaves-Samani και Priestley-Taylor. Τα κλιματικά δεδομένα που χρησιμοποιήθηκαν λήφθηκαν από τον αυτόματο τηλεμετρικό μετεωρολογικό σταθμό της Πιπεριάς Αριδαίας και αφορούσαν τα έτη 1995-2011. Επειδή στον συγκεκριμένο μετεωρολογικό σταθμό υπήρχαν σφάλματα στις μετρήσεις της καθαρής ακτινοβολίας, αυτή υπολογίστηκε μέσω της μετρημένης προσπίπτουσας ηλιακής ακτινοβολίας, και μέσω της προσπίπτουσας ηλιακής ακτινοβολίας όταν αυτή υπολογίζεται μέσω της ηλιοφάνειας. Οι σχέσεις υπολογισμού της προσπίπτουσας ηλιακής ακτινοβολίας που εξετάστηκαν στην παρούσα διατριβή είναι του Angstrom, του Hargreaves, των Glower-McCulloch, των Dogniaux-Lemoine, των Ogelman et al., των Torgul and Onat , των Almorox and Hontoria και των Chen et al.. Όσον αφορά τη σχέση του Angstrom έγινε τοπικός προσδιορισμός των εμπειρικών συντελεστών a και b με σκοπό την ακριβέστερη προσέγγισή της προσπίπτουσας ακτινοβολίας για την περιοχή της Πιπεριάς. Κάτι ανάλογο έγινε και με τη σχέση του Hargreaves όπου έγινε τοπικός επαναπροσδιορισμός του συντελεστή kRs. Τέλος, έγινε μία προσπάθεια ανάλυσης ευαισθησίας στους παράγοντες που επηρεάζουν τον υπολογισμό της εξατμισοδιαπνοής αναφοράς με τις μεθόδους που αναφέρθηκαν παραπάνω.
description: In the present MSc thesis a comparative analysis of the different estimation methods of Reference Crop Evapotranspiration was done. More specifically, the following methods of: FAO-24 Modified Penman, FAO-56 Penman-Monteith, ASCE-standardized Penman-Monteith, Hargreaves-Samani and Priestley-Taylor were analyzed. The used climate data were obtained from the automatic telemetric meteorological station of Piperia Aridaias, Greece and are referred to the years 1995-2011. Because of the errors in the measurements of net radiation, the net radiation was estimated by using the measured solar radiation. In this thesis for estimation of the radiation the relations of the Angstrom, Hargreaves, Glower-McCulloch, Dogniaux-Lemoine, Ogelman et al., Torgul and Onat, Almorox and Hontoria and Chen et al., were used. In the relationship of the Angstrom a local estimation of the empirical coefficients a and b was done for a more accurately estimation of the solar radiation at the station of Piperia. Also in the relationship of Hargreaves a local estimation of the factor KRs was done. Finally, an attempt for a sensitivity analysis of the variables that influence in the reference evapotranspiration estimation, by using the methods mentioned above, was done.
A Note on the Rotationally Symmetric SO(4) Euler Rigid Body
Creators: name: Falqui, Gregorio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K10; 70H20; 14H70

description: We consider an SO(4) Euler rigid body with two 'inertia momenta' coinciding. We study it from the point of view of bihamiltonian geometry. We show how to algebraically integrate it by means of the method of separation of variables.
description: This is a contribution to the Vadim Kuznetsov Memorial Issue on Integrable Systems and Related Topics, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Emergence of disconnected clusters in heterogeneous complex systems
Creators: name: Kovács, István A.
name: Juhász, Róbert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Percolation theory dictates an intuitive picture depicting correlated regions in complex systems as densely connected clusters. While this picture might be adequate at small scales and apart from criticality, we show that highly correlated sites in complex systems can be inherently disconnected. This finding indicates a counter-intuitive organization of dynamical correlations, where functional similarity decouples from physical connectivity. We illustrate the phenomena on the example of the Disordered Contact Process (DCP) of infection spreading in heterogeneous systems. We apply numerical simulations and an asymptotically exact renormalization group technique (SDRG) in 1, 2 and 3 dimensional systems as well as in two-dimensional lattices with long-ranged interactions. We conclude that the critical dynamics is well captured by mostly one, highly correlated, but spatially disconnected cluster. Our findings indicate that at criticality the relevant, simultaneously infected sites typically do not directly interact with each other. Due to the similarity of the SDRG equations, our results hold also for the critical behavior of the disordered quantum Ising model, leading to quantum correlated, yet spatially disconnected, magnetic domains.
description: 9 pages, 6 figures
Importance of magnetic fields in highly eccentric discs with applications to tidal disruption events
Creators: name: Lynch, Elliot M.
name: Ogilvie, Gordon I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Whether tidal disruption events (TDEs) circularise or accrete directly as a highly eccentric disc is the subject of current research and appears to depend sensitively on the disc thermodynamics. In a previous paper we applied the theory of eccentric discs to TDE discs using an $α-$prescription for the disc stress, which leads to solutions that exhibit extreme, potentially unphysical, behaviour. In this paper we further explore the dynamical vertical structure of highly eccentric discs using alternative stress models that are better motivated by the behaviour of magnetic fields in eccentric discs. We find that the presence of a coherent magnetic field has a stabilising effect on the dynamics and can significantly alter the behaviour of highly eccentric radiation dominated discs. We conclude that magnetic fields are important for the evolution of TDE discs.
description: 20 pages, 20 figure, accepted in MNRAS
Dynamics and Rheology of Ring-Linear Blend Semidilute Solutions in Extensional Flow: Single Molecule Experiments
Creators: name: Zhou, Yuecheng
name: Young, Charles D.
name: Regan, Kathryn E.
name: Lee, Megan
name: Banik, Sourya
name: Kong, Dejie
name: McKenna, Gregory B.
name: Robertson-Anderson, Rae M.
name: Sing, Charles E.
name: Schroeder, Charles M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ring polymers exhibit unique flow properties due to their closed chain topology. Despite recent progress, we have not yet achieved a full understanding of the nonequilibrium flow behavior of rings in nondilute solutions where intermolecular interactions greatly influence chain dynamics. In this work, we directly observe the dynamics of DNA rings in semidilute ring-linear polymer blends using single molecule techniques. We systematically investigate ring polymer relaxation dynamics from high extension and transient and steady-state stretching dynamics in planar extensional flow for a series of ring-linear blends with varying ring fraction. Our results show multiple molecular sub-populations for ring relaxation in ring-linear blends, as well as large conformational fluctuations for rings in steady extensional flow, even long after the initial transient stretching process has subsided. We further quantify the magnitude and characteristic timescales of ring conformational fluctuations as a function of blend composition. Interestingly, we find that the magnitude of ring conformational fluctuations follows a non-monotonic response with increasing ring fraction, first increasing at low ring fraction and then substantially decreasing at large ring fraction in ring-linear blends. A unique set of ring polymer conformations are observed during the transient stretching process, which highlights the prevalence of molecular individualism and supports the notion of complex intermolecular interactions in ring-linear polymer blends. Together with results from molecular simulations, our results suggest that ring conformational fluctuations arise due to ring-linear threading and intermolecular hydrodynamic interactions (HI). Taken together, our results provide a new molecular understanding of ring polymer dynamics in ring-linear blends in nonequilibrium flow.
description: 17 pages, 9 figures