cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Classic Maya attire as indicators of status, role and function: or you can dress them up but you can't take them anywhere
Creators: name: Clarkson, Persis Banvard
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: F 1435.3 C7 C56 1979 Microfiche
subject: Mayas - Costume and adornment
subject: Indians of Central America - Costumes and adornment

description: Bibliography: p. 180-217.
description: The iconography of over five hundred Classic Maya artifacts of the seventh to tenth centuries A. D. is examined and explained on the basis of the garments worn and activities performed. The general role of special - purpose attire and accoutrements are examined in Mesoamerica from the archaeological, ethnohistorical, and ethnographic records dating from about 3500 B. C. to the present. Special attention is focused upon the association of certain fabrics and garments with particular status, roles, and function. These criteria are applied to Classic Maya depictions on ceramics, stone, wood, bone, and shell. The Classic Maya artifacts utilized here are also analyzed independently of other sources. The analyses of the form, context , and function of the personages depicted are based upon the costume and associated paraphernalia portrayed. Seven different themes are discussed: human sacrifice, purification, accession, the ball game, deer hunting, warfare, and confrontation.
CATEGORIAL ABILITIES AS A PRECONDITION OF SCHOOLCHILDREN’S QUERIES DURING ONLINE SEARCH FOR EDUCATIONAL INFORMATION
Creators: name: Miklyaeva, Anastasia
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: online search
schoolchildren
educational activity
categorial abilities
search queries
simple search task
complex search task

description: Abstract: Introduction. This report presents the results of an experimental study aimed at assessing the contribution of categorial abilities to the characteristics of search query formulations composed by school students during educational online searches. The categorial abilities are considered as the basic 10 prerequisites for the effectiveness of educational activity. The ways of formulating search queries are determined by the characteristics of the student’s cognitive activity and by the complexity of the search task. It is currently unclear how these factors interact and contribute to the effectiveness of educational online searches. Research question: What contribution do categorial abilities make to the formulation of educational online search queries while performing both simple and complex search tasks? Materials and methods. The experimental study involved 287 school students ranging from 5th-9th grade. The students performed search tasks of varying complexity. The search actions were recorded with the use of a video screen capture program. Search query formulation strategies were identified by the analysis of these video recordings. Categorial abilities were assessed using the "categorization" technique. Results and discussion. We found two strategies for the formulation of search queries: direct formulations and clarifying formulations. Clarifying formulations were more likely to lead to assimilation of information compared to direct formulations. The categorial abilities made a more significant contribution to the productivity of performing complex tasks compared to simple ones. Conclusions. The results of the study should be used for teaching school students to develop the skills to carry out effective online searches. Funding. The research is supported by the Russian Foundation for Basic Research, project No. 19-29-14005.
title: Η ηλεκτρονική διακυβέρνηση στην Ελλάδα. Μια μελέτη ικανοποίησης του πολίτη αναφορικά με την έκδοση πιστοποιητικού εμβολιασμού κατά της νόσου Covid-19 μέσω του gov.gr
title: E-Governance in Greece. Α case study about citizens’ satisfaction regarding the Issuance of Covid-19 vaccination certificate from the gov.gr site
titleType: AlternativeTitle
Creators: name: Αποστολοπούλου, Σταυρούλα
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2022
Subjects: Δημόσια διοίκηση
Μεταρρυθμίσεις
Ψηφιοποίηση
Τεχνολογία πληροφοριών και επικοινωνίας
Ηλεκτρονική διακυβέρνηση
Καινοτομία
Δημόσιος τομέας
Διοικητική μεταρρύθμιση
Ψηφιακός μετασχηματισμός
Ηλεκτρονικές υπηρεσίες
Πληροφοριακά συστήματα
Τεχνολογικός αναλφαβητισμός
Προσβασιμότητα
Διαλειτουργικότητα συστημάτων
Ευχρηστία
Πλοήγηση
Αποδοτικότητα
Ικανοποίηση πολιτών
E-government
Public administration
Covid-19

description: Γενικότερα, η Ηλεκτρονική Διακυβέρνηση αποσκοπεί στον εκσυγχρονισμό της Δημόσιας Διοίκησης. Σημαντικός παράγοντας ήταν οι αποφάσεις λήφθηκαν για την αντιμετώπιση της πανδημίας του Covid-19. Μέσω της ανάπτυξης των Τεχνολογιών Πληροφοριών και Επικοινωνίας (ΤΠΕ), υλοποιούνται μεταρρυθμίσεις, βάσει των αναγκών των πολιτών. Αρχικά, στόχος της παρούσας εργασίας είναι η εξέταση της υφιστάμενης κατάστασης σχετικά με την Ηλεκτρονική Διακυβέρνηση στην Ελλάδα. Επιπλέον, στοχεύουμε στην ανάδειξη αποτελεσμάτων από την μελέτη ικανοποίησης των πολιτών, αναφορικά του επίκαιρου ζητήματος της έκδοσης πιστοποιητικού εμβολιασμού κατά της νόσου Covid-19. Έχοντας περιγράψει σε θεωρητικό επίπεδο την έννοια της «Ηλεκτρονικής Διακυβέρνησης», θα προχωρήσουμε στην επισκόπηση των θετικών στοιχείων, των εμποδίων και της πρακτικής εφαρμογής της ψηφιοποίησης των δημόσιων υπηρεσιών, όπως λειτουργεί στην Ελλάδα σήμερα. Ακολούθως, σχολιάζονται οι αποδόσεις της Ελλάδας στους Ευρωπαϊκούς δείκτες ψηφιοποίησης. Προχωρώντας στο τρίτο κεφάλαιο, επισημαίνονται οι βασικές παροχές της Ενιαίας Ψηφιακής Πύλης gov.gr στον πολίτη. Σημειώνεται η απεικόνιση και η επεξήγηση διαγράμματος ροής σχετικό με την έκδοση πιστοποιητικού εμβολιασμού μέσω του gov.gr. Στο τέταρτο κεφάλαιο ορίζεται η έννοια ικανοποίησης του πολίτη και απαριθμούνται οι παράγοντες που την επηρεάζουν. Βάσει των παραγόντων αυτών προχωράμε στην διεξαγωγή της έρευνας, η οποία χαρακτηρίζεται μη τυχαία, ποιοτική και δειγματοληπτική. Στο στατιστικό δείγμα της έρευνας εντάσσονται 115 άτομα, με προϋποθέσεις. Βάσει των αποτελεσμάτων η τριβή των πολιτών με την χρήση τεχνολογικών μέσων και του διαδικτύου είναι ιδιαίτερα συχνή, εκφράζοντας έναν επαρκή βαθμό ικανοποίησης. Σημαντικό στοιχείο αποτελεί η ύπαρξη τεχνολογικού αναλφαβητισμού κυρίως στις μεγαλύτερες κυρίως ηλικίες.
An empirical approach to the extragalactic background light from AEGIS galaxy SED-type fractions
Creators: name: Domínguez, Alberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The extragalactic background light (EBL) is of fundamental importance both for understanding the entire process of galaxy evolution and for gamma-ray astronomy. However, the overall spectrum of the EBL between 0.1 and 1000 microns has never been determined directly neither from observed luminosity functions (LFs), over a wide redshift range, nor from any multiwavelength observation of galaxy spectral energy distributions (SEDs). The evolving, overall spectrum of the EBL is derived here utilizing a novel method based on observations only. It is emphasized that the local EBL seems already well constrained from the UV up to the mid-IR. Since different independent methodologies such as direct measurement, galaxy counts, gamma-ray attenuation and realistic EBL modelings point towards the same EBL intensity level. A relevant contribution from Pop III stars to the local EBL seems unlikely.
description: Contributed talk at the IAU 284 SED2011 Symposium, Preston, UK, September 5-9, 2011; 4 pages, 1 figure. Online material available at http://side.iaa.es/EBL
Images of Banff and Canmore: and the use of Banff National Park by motel visitors
Creators: name: Cheng, Jacqueline Ruth
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: FC 3699 B26 C537 1978 Microfiche
subject: Banff (Alta.) - Public opinion
subject: Canmore (Alta.) - Public opinion
subject: Banff National Park (Alta.) - Public opinion

description: Bibliography: p. 202-214.
High Performance Single Layered WSe2 p-FETs with Chemically Doped Contacts
Creators: name: Fang, Hui
name: Chuang, Steven
name: Chang, Ting Chia
name: Takei, Kuniharu
name: Takahashi, Toshitake
name: Javey, Ali
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report high performance p-type field-effect transistors based on single layered (thickness, ~0.7 nm) WSe2 as the active channel with chemically doped source/drain contacts and high-κ gate dielectrics. The top-gated monolayer transistors exhibit a high effective hole mobility of ~250 cm2/Vs, perfect subthreshold swing of ~60 mV/dec, and ION/IOFF of >10^6 at room temperature. Special attention is given to lowering the contact resistance for hole injection by using high work function Pd contacts along with degenerate surface doping of the contacts by patterned NO2 chemisorption on WSe2. The results here present a promising material system and device architecture for p-type monolayer transistors with excellent characteristics.
Focus stacking in non-contact dermoscopy
Creators: name: Jütte, Lennart
name: Yang, Zhiyao
name: Sharma, Gaurav
name: Roth, Bernhard
Publisher: name: Bristol : IOP Publ.
Year: 2022
Subjects: subject: dermatology
subject: dermoscopy
subject: focus stacking
subject: melanoma
subject: skin
subject: skin cancer imaging
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: Dermoscopy is the main tool for early detection of skin cancer. Non-contact dermoscopes often suffer from a small depth of field leading to images of skin topographies with regions that are not in focus. We aim to provide an easy-to-implement focus stacking-based approach to ensure all-in-focus images from a non-contact dermoscope. Further, we aim to extract additional information about the skin topography from the image stacks. The focus stacking procedure itself is implemented in a non-contact dermoscope with an electrically adjustable focus realized by using a tunable liquid lens. We show that all-in-focus imaging is possible for non-contact dermoscopy and deliver a method to extract topographical information for dermatologists from the acquired image stacks. Our finding indicate that the approach can be valuable for non-contact dermoscopic examination as well as for the early detection of skin diseases such as cancer as it possible to derive hyperfocus images and information on the skin topography. With this, we were able to develop a software for the acquisition of the raw image data and its processing into a high resolution hyperresolution dermoscopic image. In the next steps, we plan to apply the approach in the clinical environment for skin cancer diagnostics or imaging of inflammatory skin diseases.
CHILDBIRTH EXPERIENCE BEFORE AND DURING THE COVID-19 PANDEMIC: PTSD AND POSTPARTUM DEPRESSION
Creators: name: Yakupova, Vera
name: Suarez, Anna
name: Kharchenko, Anna
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: ostpartum depression
postpartum PTSD
obstetric violence
COVID-19 pandemic
birth experience

description: Abstract: Postpartum depression (PPD) and post-traumatic stress disorder (PTSD) are the most common complications after childbirth: up to 17% of healthy women worldwide experience PPD (https://pubmed.ncbi.nlm.nih.gov/30114665/) and about 3-4% of women experience PTSD (Ayers et.al, 2016). In the presence of risk factors (complications during pregnancy, preterm birth, prenatal depression, severe fear for the health of the child, lack of support during childbirth, etc.), postpartum PTSD can occur in 15-19% of women (Yildiz et. al, 2017). The purpose of the study: to investigate the associations between the changes in the maternity care system during the pandemic and the mental health of mothers in Russia. A sample of Russian women who gave birth during the first year of the pandemic (n=1645) and a control group of women who gave birth before the pandemic (n=611) completed an anonymous online survey about recent births. PTSD symptoms were assessed using the City University of London Birth Injury Rating Scale questionnaire, PRD symptoms were assessed using the Edinburgh scale. The prevalence of postpartum depression (43.9% vs 45.7%, p = 0.48) and PTSD (17.5% vs 15.1%, p = 0.64) did not change significantly due to the pandemic. Throughout the study period, the severity of symptoms of these disorders remained high. There was a statistically significant increase in the frequency of obstetric violence during the pandemic (p = 0.015), which, in turn, is highly correlated with postpartum PTSD (p < 0.001). Also, during the pandemic, the presence of preparation for childbirth was associated with lower risks of PTSD (p < 0.001), a similar association was not found before the pandemic (p = 0.19).
CHILDREN AND ADULTS FROM CATERPILLARS TO BUTTERFLIES THROUGH KEY TO LEARNING TOOLS
Creators: name: Aytalina Krotova
name: Koryakina, Alyona
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: Trilingual educational environment
cultural tools
development of creativity and cognitive abilities

description: Abstract: The staff of Municipal Kindergarten #10 "Tullukchaan" from Yakutsk, Republic of Sakha (Yakutia), share their practical experience of how the participation in the Key to Learning program resulted in the development of not only children, but also teachers and kindergarten administrators, and the changes that occur in the trilingual educational environment.
Detection of telomeric DNA circles in human ALT cells using rolling circle amplification
Creators: name: Tkac, Jan
Publisher: name: University of British Columbia
Year: 2009

description: Telomeres, the nucleoprotein structures at the ends of linear chromosomes, maintain genomic stability by protecting chromosome ends from fusion, degradation, and processing by the DNA double-strand break repair machinery. Telomere shortening, which occurs naturally in somatic cells during aging, leads to cellular senescence or apoptosis. In contrast, germline cells and cancer cells acquire unlimited replicative potential by activating a telomere lengthening mechanism, generally via reactivating the enzyme telomerase reverse transcriptase. To date, drug development targeting cellular immortalization in cancer has focused on telomerase inhibition. However, in a subset of tumours and in vitro-immortalized cell lines, telomeres are maintained by homologous recombination-mediated pathways, termed alternative lengthening of telomeres (ALT). ALT tumours are expected to be refractory to anti-telomerase therapies, so the ability to rapidly and reliably screen for ALT status in tumour-derived cells is essential for guiding therapeutic strategies that target cellular immortalization. One characteristic of ALT-mediated telomere maintenance is the presence of extrachromosomal telomeric repeat-containing DNA circles (t-circles), which provide an attractive target for detection in screening applications. Current methods oft-circle detection require considerable amounts of cells, making them unsuitable for analysis of limited clinical samples. We optimized a screen for ALT status based on a novel technique of rolling circle amplification (RCA) oft-circles from extrachromosomal DNA extracts of human ALT cells. We demonstrate that RCA requires a much lower number of cells than previously established t-circle detection methods, and screening many samples can be performed in parallel, making RCA suitable for analyzing clinical samples. T-circles were reproducibly detected in human immortalized ALT cell lines, but not in telomerase-utilizing cell lines. In addition, ectopic over-expression of telomerase in an ALT cell line does not appear to affect t-circle formation. This suggests that presence of active telomerase within a cell does not inhibit all telomeric recombination reactions. The potential for RCA as a tool to screen tumour samples for ALT activity and the link between telomerase and ALT-based telomere lengthening mechanisms are discussed.
Predictability of evolutionary trajectories in fitness landscapes
Creators: name: Lobkovsky, Alexander E.
name: Wolf, Yuri I.
name: Koonin, Eugene V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Biomolecules (q-bio.BM)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Experimental studies on enzyme evolution show that only a small fraction of all possible mutation trajectories are accessible to evolution. However, these experiments deal with individual enzymes and explore a tiny part of the fitness landscape. We report an exhaustive analysis of fitness landscapes constructed with an off-lattice model of protein folding where fitness is equated with robustness to misfolding. This model mimics the essential features of the interactions between amino acids, is consistent with the key paradigms of protein folding and reproduces the universal distribution of evolutionary rates among orthologous proteins. We introduce mean path divergence as a quantitative measure of the degree to which the starting and ending points determine the path of evolution in fitness landscapes. Global measures of landscape roughness are good predictors of path divergence in all studied landscapes: the mean path divergence is greater in smooth landscapes than in rough ones. The model-derived and experimental landscapes are significantly smoother than random landscapes and resemble additive landscapes perturbed with moderate amounts of noise; thus, these landscapes are substantially robust to mutation. The model landscapes show a deficit of suboptimal peaks even compared with noisy additive landscapes with similar overall roughness. We suggest that smoothness and the substantial deficit of peaks in the fitness landscapes of protein evolution are fundamental consequences of the physics of protein folding.
description: 14 pages, 7 figures
CHILDREN'S MENTORING IN A DIGITAL ENVIRONMENT "FROM CHILDREN TO CHILDREN"
Creators: name: Sovina, Antonina
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: digital environment
interests of modern children
mentorship
information security

description: Abstract: The report is devoted to the problem of leisure and interests of modern children. In recent years, information technology has been actively developing. This has made it possible to facilitate many working systems and replace the typical games and toys of our childhoods. It is necessary to consider the fact that the interests of modern children are very different from the interests of children of previous generations. This is not "degradation", as many believe. Instead, this is the next stage in the development of the modern world a paradigm shift. The problem is that the most popular information communication systems from the children’s perspective provide a huge flow of information in the form of vivid photo and video materials. At the same time, information varies greatly from positive to negative, potentially causing various personality disorders in a child. One of the most popular and interesting activities today is creating your own video clips, maintaining your own video blog, and watching video content created by other children and adults. The task of teachers and parents is to ensure the safety of the information that becomes available to children. This problem can be solved through the creation of a mentoring program "From Children to Children", which will be implemented on the internet platform of the "Club of Educators / Teachers" portal.
Rotational averaging-out gravitational sedimentation of colloidal dispersions and phenomena
Creators: name: Masri, Djamel El
name: Vissers, Teun
name: Badaire, Stephane
name: Stiefelhagen, Johan C. P.
name: Vutukuri, Hanumantha Rao
name: Helfferich, Peter
name: Zhang, Tian Hui
name: Kegel, Willem K.
name: Imhof, Arnout
name: van Blaaderen, Alfons
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We report on the differences between colloidal systems left to evolve in the earth's gravitational field and the same systems for which a slow continuous rotation averaged out the effects of particle sedimentation on a distance scale small compared to the particle size. Several systems of micron-sized colloidal particles were studied: a hard sphere fluid, colloids interacting via long-range electrostatic repulsions above the freezing volume fraction, an oppositely charged colloidal system close to either gelation and/or crystallization, colloids with a competing short-range depletion attraction and a long-range electrostatic repulsion, colloidal dipolar chains, and colloidal gold platelets under conditions where they formed stacks. Important differences in the structure formation were observed between the experiments where the particles were allowed to sediment and those where sedimentation was averaged out. For instance, in the case of colloids interacting via long-range electrostatic repulsions, an unusual sequence of dilute-Fluid/dilute-Crystal/dense-Fluid/dense-Crystal phases was observed throughout the suspension under the effect of gravity, related to the volume fraction dependence of the colloidal interactions, whereas the system stayed homogeneously crystallized with rotation. For the oppositely charged colloids, a gel-like structure was found to collapse under the influence of gravity with a few crystalline layers grown on top of the sediment, whereas when the colloidal sedimentation was averaged out, the gel completely transformed into crystallites that were oriented randomly throughout the sample. Rotational averaging out gravitational sedimentation is an effective and cheap way to estimate the importance of gravity for colloidal self-assembly processes.
description: 13 pages, 13 figures
CLINICAL AND PSYCHOLOGICAL MOTIVES IN RUSSIAN ANIMATION
Creators: name: Balashova, Elena
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: clinical psychology
animation
primary school children
teenagers

description: Abstract: Clinical psychology, which emerged as a field of science and practice at the end of the 19th century, has always attracted great attention. Even before its emergence as an independent science, various individual features of character, personality, and mental functions aroused the interest of philosophers, medics, and writers. Today, mental peculiarities and disorders are the object of both scientific research and artistic creativity, in which they are interpreted within the framework of the so-called aesthetic paradigm. One example of such a non-standard understanding of clinical and psychological phenomena and ideas is animation. Of course, the animation genre is very variable. It encompasses both entertaining and educational tasks and is aimed at different age groups. Psychological ideas and problems are addressed to children of primary school age, teenagers, young and adult fans of the animation genre. All these categories of viewers perceive these ideas in cartoons in different ways, but with continued interest and pleasure. In Russia, such cartoons appeared in the 1960s. One can mention as examples the cartoons of F. Khitruk, R. Kachanov and others. Modern cartoons present a variety of subjects that are directly or indirectly related to clinical and psychological problems. These content changes have led to unexpected consequences such as sleep disorders (insomnia), errors of memorization, the risks of gaming and computer addiction, hyperactivity, accentuation of various character traits, an attempt to extract secondary benefits from the common cold, and problems in interpersonal relationships. The appearance of such topics may indicate the growing interest of society in psychology, the possibility of understanding clinical psychology beyond viewing it as a strict science, and the potential of using such animation options in the psychotherapy of younger schoolchildren and adolescents.
Self-intersecting Regge trajectories in multi-channel scattering
Creators: name: Sokolovski, D.
name: Felfli, Z.
name: Msezane, A. Z.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a simple direct method for calculating Regge trajectories for a multichannel scattering problem. The approach is applied to the case of two coupled Thomas-Fermi type potentials, used as a crude model for electron-atom scattering below the second excitation threshold. It is shown that non-adiabatic interaction may cause formation of loops in Regge trajectories. The accuracy of the method is tested by evaluating resonance contributions to elastic and inelastic integral cross sections.
description: 5 pages, 4 figures
CLINICAL CHILD PSYCHOLOGY IN THE DIGITAL WORLD
Creators: name: Daidy Pérez Quintana
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: Covid-19
psychological help
technologies
mental health

description: Abstract: The pandemic caused by Covid-19 forced governments around the world to take preventive and restrictive measures to stop contagion and loss of human lives. However, despite all the efforts made, humanity has had to face the economic, social, and psychological consequences generated by this health crisis for two consecutive years. Physical isolation at home forced people to restructure their lives. This factor, in addition to the uncertainty, fear, and hopelessness of the situation, led to the emergence of negative emotions and some psychological disorders among the adult population. The children have not been exempt from this reality, and due to the characteristics of their psychological development, they are a vulnerable population, very sensitive to changes in their routines and life habits. In Cuba, on March 26th 2020, a group of professionals specialized in child clinical psychology began to provide support and psychological help to families with children and adolescents, using Telegram and WhatsApp. This allowed clinical psychology, through the use of technology, to discover new resources and tools to develop its work. It involved the direct evaluation of the psychological well-being of children with families as mediators. In this way, the use of technologies and virtual platforms by children and their families, allowed clinical psychology to reach every home in need of guidance and psychological support in a time of crisis.
Analytical and experimental investigation of the performance of exhaust mufflers with flow
Creators: name: Thawani, Prakash T.
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: TJ 789 T52 1978 Microfiche
subject: Gas and oil engines - Mufflers

description: Bibliography: p. 176-181.
description: A method for evaluating the impedance of an unknown source has been developed. Source impedance including the effect of mean flow was used to predict the attenuation of expansion chamber type exhaust mufflers, with mean .flow in the system. The transfer matrix approach has been used to predict the noise reduction characteristics of various laboratory and two commercial muffler configurations. Mathematical models have been derived for uniform pipe elements with mean flow and damping, and their steady state solutions are transformed into two-by-two transfer matrices. Another muffler performance criterion called noise reduction is used to measure the performance of laboratory mufflers and some simulated configurations of commercial exhaust mufflers. The performance of exhaust muffler systems was then predicted by considering the product of transfer matrices taking into account all the muffler components present in the system. A general algorithm has been developed for an approximate frequency analysis of any complex muffler system. Knowing the relative magnitudes of all the parameters present in a system, various resonant and antiresonant peaks in the performance curves can be predicted using the algorithm. To determine the general properties of commonly used silencer components, some reactive muffler configurations are studied with and without mean flow and the performance of some similar configurations is compared. The transfer matrix of a circumferencially lined pipe element including the effect of mean flow has been derived and used to predict the performance of some expansion chamber type dissipative exhaust mufflers.
Localization of superconductivity in superconductor-electromagnet hybrids
Creators: name: Ataklti, G. W.
name: Aladyshkin, A. Yu.
name: Gillijns, W.
name: Nefedov, I. M.
name: Van de Vondel, J.
name: Silhanek, A. V.
name: Kemmler, M.
name: Kleiner, R.
name: Koelle, D.
name: Moshchalkov, V. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the nucleation of superconductivity in a superconducting Al strip under the influence of the magnetic field generated by a current-carrying Nb wire, perpendicularly oriented and located underneath the strip. The inhomogeneous magnetic field, induced by the Nb wire, produces a spatial modulation of the critical temperature T_c, leading to a controllable localization of the superconducting order parameter (OP) wave function. We demonstrate that close to the phase boundary T_c(B_ext) the localized OP solution can be displaced reversibly by either applying an external perpendicular magnetic field B_ext or by changing the amplitude of the inhomogeneous field.
description: 10 pages, 6 figures
CORRELATIONS BETWEEN SCREEN TIME, OUTDOOR ACTIVITY TIME, AND PHYSICAL HEALTH OF PRESCHOOLERS
Creators: name: Yufang Cui
name: Minyi Li
name: Yifei Chu
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: screen time
outdoor activity time
body mass index
physical health
preschoolers

description: Abstract: Objective: To investigate the correlations between screen time, outdoor activity time, and the physical health of preschoolers, so as to provide suggestions for formulating interventions to prevent myopia and obesity in children. Methods: A cross-sectional study was carried out in Shenzhen city. A representative sample of 5,226 preschoolers and their caregivers were recruited by proportional stratified cluster sampling. Data were collected by the Chinese early human capability index (CHe HCI), children's media use in daily family life questionnaire, and body mass index (BMI). Linear regression and binary logistic regression models were used to analyze the effects of screen time and outdoor activity time on physical health of preschoolers. Results: Preschoolers spent (110.30 ± 90.67) min/d on screen and (61.11 ± 41.16) min/d on outdoor activity. 5. 47% of preschoolers were overweight. Screen time negatively predicted preschoolers ' physical health, while outdoor activity time positively predicted preschoolers ' physical health of CHe HCI. There was no significant association between outdoor activity time and BMI of preschoolers. Conclusion: This study suggests parents might need to reduce preschoolers' screen time and increase outdoor activity time to promote the physical health development of preschoolers.
The Infrared Light Curve of SN 2011fe in M101 and the Distance to M101
Creators: name: Matheson, T.
name: Joyce, R. R.
name: Allen, L. E.
name: Saha, A.
name: Silva, D. R.
name: Wood-Vasey, W. M.
name: Adams, J. J.
name: Anderson, R. E.
name: Beck, T. L.
name: Bentz, M. C.
name: Bershady, M. A.
name: Binkert, W. S.
name: Butler, K.
name: Camarata, M. A.
name: Eigenbrot, A.
name: Everett, M.
name: Gallagher, J. S.
name: Glikman, P. M. Garnavich E.
name: Harbeck, D.
name: Hargis, J. R.
name: Herbst, H.
name: Horch, E. P.
name: Howell, S. B.
name: Jha, S.
name: Kaczmarek, J. F.
name: Knezek, P.
name: Manne-Nicholas, E.
name: Mathieu, R. D.
name: Meixner, M.
name: Milliman, K.
name: Power, J.
name: Rajagopal, J.
name: Reetz, K.
name: Rhode, K. L.
name: Schechtman-Rook, A.
name: Schwamb, M. E.
name: Schweiker, H.
name: Simmons, B.
name: Simon, J. D.
name: Summers, D.
name: Young, M. D.
name: Weyant, A.
name: Wilcots, E. M.
name: Will, G.
name: Williams, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present near infra-red light curves of supernova (SN) 2011fe in M101, including 34 epochs in H band starting fourteen days before maximum brightness in the B-band. The light curve data were obtained with the WIYN High-Resolution Infrared Camera (WHIRC). When the data are calibrated using templates of other Type Ia SNe, we derive an apparent H-band magnitude at the epoch of B-band maximum of 10.85 \pm 0.04. This implies a distance modulus for M101 that ranges from 28.86 to 29.17 mag, depending on which absolute calibration for Type Ia SNe is used.
description: 9 pages, 3 figures, emulateapj style, accepted for publication in The Astrophysical Journal
The Evolution of cratonic basin from carbonate to evaporate deposition, and the resulting stratigraphic and diagenetic changes, Upper Elk Point subgroup, northeastern Alberta
Creators: name: Corrigan, Anthony F.
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: QE 471 C65 1975 Microfiche
subject: Sedimentation and deposition
subject: Evaporites
subject: Geology, Stratigraphic
subject: Diagenesis
subject: Geology - Alberta

description: Bibliography: p. 310-328.
Diffusion-Based Density-Equalizing Maps: an Interdisciplinary Approach to Visualizing Homicide Rates and Other Georeferenced Statistical Data
Creators: name: Mazzitello, Karina I.
name: Candia, Julián
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: In every country, public and private agencies allocate extensive funding to collect large-scale statistical data, which in turn are studied and analyzed in order to determine local, regional, national, and international policies regarding all aspects relevant to the welfare of society. One important aspect of that process is the visualization of statistical data with embedded geographical information, which most often relies on archaic methods such as maps colored according to graded scales. In this work, we apply non-standard visualization techniques based on physical principles. We illustrate the method with recent statistics on homicide rates in Brazil and their correlation to other publicly available data. This physics-based approach provides a novel tool that can be used by interdisciplinary teams investigating statistics and model projections in a variety of fields such as economics and gross domestic product research, public health and epidemiology, socio-demographics, political science, business and marketing, and many others.
description: 16 pages, 7 figures. To appear in Vol. 42 of Braz. J. Phys
COGNITIVE DEVELOPMENT OF CHILDREN INVOLVED IN THE DIGITAL WORLD TO VARYING DEGREES
Creators: name: Isachenkova, Marina
name: Nikolaeva, Elena
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: parents
children
gadgets
cognitive processes
apps
Internet

description: Abstract: The sudden shift in the child's ratio between real and digital worlds due to the pandemic has raised the question of the benefits and harms of gadgets and the conditions of their use at different stages of ontogenesis. Forced to study online and then do homework using a computer, schoolchildren violated all the norms of a healthy lifestyle. The aim of this study was to describe the reality of children under 11 in the digital world and to create evidence-based recommendations for teachers and parents regarding the norms of gadget use for different ages and the conditions under which this interaction will promote the cognitive development of a child of a particular age. An online survey of parents and children was conducted to realize this objective. Two questionnaires were developed, one for parents (to describe the gadget-use situation of pre-school children) and one for school-age children. The data were analyzed using SPSS software. A total of 866 parents and 32 children participated in the survey. It was shown that 10.2% of children under the age of four had their own gadget. More than half of children (53.7%) were introduced to a gadget before the age of two, and 4.5% of children received a gadget before the age of six months. 64.4% of parents admitted that they give their children a gadget to do their own thing or to rest from their children. 37.5% of primary school age children had a social network account, and only 10% of them had an account with their parents, others did it themselves. The main conclusion of the work was that parents are ignorant of the possibilities of today's digital world aimed at creating apps for the cognitive development of the child, and thus accustom the child to the passive absorption of digital information.
The Otto Fiord formation: a carboniferous submarine evaporite unit of the Canadian Arctic Islands
Creators: name: Christie, D. L.
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: QE 471 C48 1975 Microfiche
subject: Evaporites
subject: Rocks, Carbonate
subject: Limestone - Canada, Northern
subject: Geology - Canada, Northern

description: Bibliography: p. 86-90.
Electronically excited cold ion crystals
Creators: name: Li, Weibin
name: Lesanovsky, Igor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The laser excitation of an ion crystal to high lying and long-lived electronic states is a genuine many-body process even if in fact only a single ion is excited. This is a direct manifestation of the strong coupling between internal and external dynamics and becomes most apparent in the vicinity of a structural phase transition. Here we show that utilizing highly excited states offers a new approach to the coherent manipulation of ion crystals. This permits the study of phenomena which rely on a strong coupling between electronic and vibrational dynamics and opens up a route towards the quantum simulation of molecular processes in a Paul trap.
description: 5 pages, 4 figures
The triggering role of carrier mobility in the fractional quantum Hall effect-evidence in graphene
Creators: name: Jacak, Janusz
name: Jacak, Lucjan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent experiments on suspended graphene layers have indicated the crucial role of carrier mobility in the competition between Laughlin collective state and insulating state, probably of Wigner-crystal-type. Moreover, the fractional quantum Hall effect (FQHE) in graphene has been observed at a low carrier density where the interaction is reduced as a result of particles dilution. This suggests that the interaction may not be as important in the triggering of FQHE as expected based on the standard formulation of the composite fermions model. Here, the topological arguments are presented to explain these novel features of the FQHE in graphene and, the triggering role of carriers mobility in particular.
Quenching of the quantum Hall effect in graphene with scrolled edges
Creators: name: Cresti, Alessandro
name: Fogler, Michael M.
name: Guinea, Francisco
name: Neto, A. H. Castro
name: Roche, Stephan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Edge nanoscrolls are shown to strongly influence transport properties of suspended graphene in the quantum Hall regime. The relatively long arc length of the scrolls in combination with their compact transverse size results in formation of many nonchiral transport channels in the scrolls. They short-circuit the bulk current paths and inhibit the observation of the quantized two-terminal resistance. Unlike competing theoretical proposals, this mechanism of disrupting the Hall quantization in suspended graphene is not caused by ill-chosen placement of the contacts, singular elastic strains, or a small sample size.
Hepatitis c virus infection / re-infection in illicit drug users
Creators: name: Barrieshee, Ahmed
Publisher: name: University of British Columbia
Year: 2009

description: Introduction: Over 300,000 Canadians have chronic Hepatitis C virus (HCV) infection, over half being current or former Injection drug users (IDUs). The possibility of re-infection is often cited as a reason for not initiating treatment in this group of patients, although recent observational data suggest that the rate of re-infection may be reduced following spontaneous or treatment-induced virologic clearance, such data are often retrospective and incomplete. Methods: In a prospective study to evaluate the incidence of HCV viremia, we indentified a cohort of IDUs at risk of new infection, who were receiving care at the Pender Community Health Centre on Vancouver’s Downtown East Side. Potential subjects were identified as either: never been infected with HCV (non-infected arm), spontaneously cleared the virus (spontaneous arm), or achieved a sustained virologic response after treatment (SVR arm). A questionnaire to identify demographics, health status, risk behavior and drug use was administered at baseline and every 6 months, along with blood tests to identify their HCV status. Results: 518 subjects were screened, 245 (47%) were excluded because of being viremic and 69 (13 %) met the criteria for inclusion in the study: 18 in the non-infected, 29 in the spontaneous and 22 in the SVR arm respectively. There were no significant differences among the 3 groups with respect to age, ethnicity, source of income, unstable housing, and being on opioid maintenance program. Over follow-up, 20% of the non-infected group became viremic, as compared to 0% of the other two groups (p=0.04). Injecting drugs in the past 30 days (p=0.004), sharing non-injection equipments (p=0.015), heroin, amphetamines, and combined drugs use was significantly higher in the non-infected compared to SVR arm (p=0.02, 0.04 and 0.02 respectively). There were no significant differences in drug use and risk behavior between non-infected and spontaneous arms. Conclusion: We have demonstrated in a prospective cohort with systematic follow-up that HCV infection is more likely to occur in those who have never been previously infected, and that this susceptibility to infection cannot be completely explained by an increase in risk behavior, at least as compared to individuals who have cleared their viremia spontaneously.
Stratigraphic and sedimentary relationships at the western edge of the middle Cambrian carbonate facies belt, Field, British Columbia
Creators: name: McIlreath, Ian A.
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: Geology, Stratigraphic - Cambrian
subject: Geology - Rocky Mountains
subject: Sedimentary structures

description: Bibliography: p. 248-259.
Stratigraphy and paleoenvironmental patterns of the Peyto - Mt. Whyte sediments (Lower-Middle Cambrian) of the southwestern Canadian Rocky Mountains
Creators: name: Hockley, Glenn D.
Publisher: name: University of Calgary
Year: 1973
Subjects: subject: QE 656 H63 1973
subject: Geology, Stratigraphic - Cambrian
subject: Paleontology - Cambrian
subject: Geology - Alberta - Jasper
subject: Geology - Alberta - Banff

description: Bibliography: p. 70-75.
title: Μέθοδος αποτίμησης του κινδύνου μέσω VaR σε χαρτοφυλάκιο διεθνών χρηματιστηριακών δεικτών
title: VaR risk assessment method for a portfolio of international stock market indices
titleType: AlternativeTitle
Creators: name: Οικονομόπουλος, Κωνσταντίνος-Εφραίμ
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Value at Risk
subject: Χρηματοοικονομική ανάλυση
subject: Χαρτοφυλάκιο
subject: Κίνδυνος αγοράς
subject: Μοντέλα προβλέψεων

description: Η πολυπλοκότητα και η αβεβαιότητα που παρουσιάζει το παγκόσμιο χρηματοπιστωτικό σύστημα είχαν ως επακόλουθο την απώλεια υψηλών χρηματικών ποσών από τις επιχειρήσεις και τις τράπεζες. Τις δύο τελευταίες δεκαετίες, οι αγορές κλήθηκαν να αντιμετωπίσουν το 2008 την πτώχευση της Lehman Brothers, το 2011 την κρίση χρέους των Ευρωπαϊκών χωρών , το 2020 την υγειονομική κρίση και την παύση της εμπορικής δραστηριότητας και τέλος την ενεργειακή κρίση λόγω του πολέμου Ρωσίας Ουκρανίας. Τα χρηματοπιστωτικά ιδρύματα για να μπορέσουν να αντιμετωπίσουν αποτελεσματικά τους κινδύνους της αγοράς στράφηκαν στην διαμόρφωση εργαλείων πρόβλεψης και διαχείρισης των διαφόρων κινδύνων. Το Value at Risk (VaR) αποτελεί μία από τις πιο διαδεδομένες μεθόδου αντιμετώπισης κινδύνου καθώς εκφράζει την εκτιμώμενη μέγιστη ζημία μιας συγκεκριμένης επένδυσης σε ορισμένη χρονική περίοδο και επίπεδο εμπιστοσύνης. Η παρούσα εργασία εξετάζει τις βασικές μέθοδοι υπολογισμού VaR. Στο θεωρητικό πλαίσιο της εργασίας θα αναλυθούν οι κίνδυνοι που καλούνται να αντιμετωπίσουν τα χρηματοπιστωτικά ιδρύματα στο σύγχρονο οικονομικό περιβάλλον. Παράλληλα, στην παρούσα εργασία θα εξεταστεί ο ορισμός του VaR, η σημασία του καθώς και τα οφέλη και οι αδυναμίες του κατα την χρήση του. Θα μελετηθούν οι βασικές μέθοδοι υπολογισμοί του, Μέθοδο Διακύμανσης – Συνδιακύμανσης τη Μέθοδο Ιστορικής Προσομοίωσης και τη Μέθοδο Προσομοίωσης Monte Carlo. Τέλος, θα παρουσιάσουμε την πρακτική εφαρμογή των μεθόδων αυτών σε χαρτοφυλάκιο το οποίο θα περιλαμβάνει τους δείκτες του ΧΑ & DAX.
Momentum-resolved radio-frequency spectroscopy of ultracold atomic Fermi gases in a spin-orbit coupled lattice
Creators: name: Liu, Xia-Ji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate theoretically momentum-resolved radio-frequency (rf) spectroscopy of a noninteracting atomic Fermi gas in a spin-orbit coupled lattice. This lattice configuration has been recently created at MIT [Cheuk et al., arXiv:1205.3483] for 6Li atoms, by coupling the two hyperfine spin-states with a pair of Raman laser beams and additional rf coupling. Here, we show that momentum-resolved rf spectroscopy can measure single-particle energies and eigenstates and therefore resolve the band structure of the spin-orbit coupled lattice. In our calculations, we take into account the effects of temperatures and harmonic traps. Our predictions are to be confronted with future experiments on spin-orbit coupled Fermi gases of 40K atoms in a lattice potential.
description: 9 pages, 8 figures