cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamical nuclear spin polarization and the Zamboni effect in gated double quantum dots
Creators: name: Ramon, Guy
name: Hu, Xuedong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A dynamical nuclear polarization scheme is studied in gated double dots. We demonstrate that a small polarization ($\sim 0.5%$) is sufficient to enhance the singlet decay time by two orders of magnitude. This enhancement is attributed to an equilibration process between the nuclear reservoirs in the two dots accompanied by reduced fluctuations in the Overhauser fields, that are mediated by the electron-nuclear spin hyperfine interaction.
description: 4 pages, 3 figures
Изменение технологического качества маточных корнеплодов сахарной свёклы в зависимости от способа хранения
Creators: name: Н.А. Лазутина
name: М.А. Смирнов
Publisher: name: Сахар
Year: 2021
Subjects: фунгицид
инфракрасное излучение
поверхностно-активное вещество (ПАВ)
маточные корнеплоды
технологическое качество

description: Исследована эффективность обработки маточных корнеплодов сахарной свёклы фунгицидом «Кагатник», ВРК и инфракрасным излучением – как отдельно, так и в комплексе – перед закладкой их на длительное хранение. Описано влияние данных приёмов на технологическое качество посадочного материала. Наибольший эффект установлен при комплексной обработке маточных корнеплодов фунгицидом «Кагатник», ВРК с инфракрасным излучением, а также баковой смесью «Кагатник», ВРК с поверхностно-активным веществом «Аллюр», Ж. В данных вариантах после хранения отмечено минимальное снижение содержания сахарозы и накопление несахаров, что в итоге обеспечивает лучшее технологическое качество посадочного материала.
Exact Haldane mapping for all $S$ and super universality in spin chains
Creators: name: Pruisken, A. M. M.
name: Shankar, R.
name: Surendran, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The low energy dynamics of the anti-ferromagnetic Heisenberg spin $S$ chain in the semiclassical limit $S\to\infty$ is known to map onto the O(3) nonlinear $σ$ model with a $θ$ term in 1+1 dimension. Guided by the underlying dual symmetry of the spin chain, as well as the recently established topological significance of "dangling edge spins," we report an {\em exact} mapping onto the O(3) model that avoids the conventional large $S$ approximation altogether. Our new methodology demonstrates all the super universal features of the $θ$ angle concept that previously arose in the theory of the quantum Hall effect. It explains why Haldane's original ideas remarkably yield the correct answer in spite of the fundamental complications that generally exist in the idea of semiclassical expansions.
Signatures of Double Charged Higgs in $SU(3)_L\otimes U(1)_N$ model
Creators: name: Montalvo, J. E. Cieza
name: Cortez, Nelson V.
name: Tonasse, Mauro D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The scalar sector of the simplest version of the 3-3-1 electroweak models is constructed with three Higgs triplets only. We show that a relation involving two of the constants of the Higgs potential, two vacuum expectation values of the neutral scalars and the mass of the doubly charged Higgs boson leads to important information concerning the signals of this scalar particle.
description: 6 pages and 9 figures
Why Two-Dimensional Semiconductors Generally Have Low Electron Mobility
Creators: name: Cheng, Long
name: Zhang, Chenmu
name: Liu, Yuanyue
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Atomically thin (two-dimensional, 2D) semiconductors have shown great potential as the fundamental building blocks for next-generation electronics. However, all the 2D semiconductors that have been experimentally made so far have room-temperature electron mobility lower than that of bulk silicon, which is not understood. Here, by using first-principles calculations and reformulating the transport equations to isolate and quantify contributions of different mobility-determining factors, we show that the universally low mobility of 2D semiconductors originates from the high 'density of scatterings,' which is intrinsic to the 2D material with a parabolic electron band. The density of scatterings characterizes the density of phonons that can interact with the electrons and can be fully determined from the electron and phonon band structures without knowledge of electron-phonon coupling strength. Our work reveals the underlying physics limiting the electron mobility of 2D semiconductors and offers a descriptor to quickly assess the mobility.
Welborn, Laurence L.: Vom Unterrichten der Bibel im "Ausnahmezustand"
Creators: name: Dahling-Sander, Christoph
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 52 Nr. 2 (2003): Ökumenische Rundschau, Band 52, Heft 2
2014 Ema Llona Yareja recordings
Creators: name: Llona Yareja, Ema
name: Beier, Christine
name: Berger, Marcus P.
name: Zerbe, Alison
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: iqu

description: WAV audio recordings of 7 texts, in Iquito followed by Loretano Spanish [unless noted]:
1. AMP: Jɨɨ́taaraata Íima ijákiaakɨ júuti: Cómo Ema picó una puma garza: How Ema speared a tiger heron
(Iquito: 4m47sec; total [mixed IQU/SPQ]: 14m53sec)
2. BRU: Maákata aámuuyaárikɨ nuu-sakújaaja-jatá: Cómo los antepasados mataban con su piripiri: How our forefathers killed with their 'piripiri'
(Iquito: 2m07sec; total: 7m15sec)
3. CAN: Agucha nawɨyini: La foto de Agucha: The photo of Agucha
(Iquito: 2m07sec; total: 7m15sec) [original mono MP3 converted to stereo WAV with Audacity]
4. EKI: Kii-niíyaaka nakusiijá tɨɨ kíija jɨɨ́tikari taárikɨ kitáaka kíija: He conocido a mi marido cuando era señorita yo: I met my husband when I was a young woman
(Iquito: 18m20sec; total: 31m47sec)
5. PAU: Siaruuja asáriina: Seso del paucar: ‘Paucar’ brains
(Iquito: 1m25sec; total: 3m11sec) [original mono WAV converted to stereo WAV with Audacity]
6. PUU: Pupuja saakɨ́ɨni: El cuento del bujito: Story of the pygmy owl
(Iquito: 2m03sec; total: 3m59sec) [original mono WAV converted to stereo WAV with Audacity]
7. TIA: Kií-taa iwɨɨriaakurá anemia-jatá: Casi me muero con la anemia: I was dying from anemia
(Iquito: 10m55sec; total: 18m14sec)
title: Truck Route Access Evaluation
title: Cook Family Foods, Grayson, Site #2663
titleType: Subtitle
Creators: name: Weber, Joel M.
name: Agent, Kenneth R.
name: Aldridge, Brian
name: Aultman-Hall, Lisa
name: Cain, David
name: Lefever, Nicole
name: Stamatiadis, Nikiforos
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1998
Subjects: subject: Transportation Engineering

description: This is a study undertaken on behalf of the Kentucky Transportation Cabinet (KYTC). There are two main objectives of the Freight Movement and Intermodal Access in Kentucky Study (SPR 98-189): evaluation of the access for trucks between intermodal or other truck generating sites and the National Highway System (NHS); and furthering the understanding of freight commodity flows throughout the state. This report summarizes the access evaluation for the Cook Family Foods facility located in Carter county in the FIVCO Area Development District (ADD) and KYTC Highway District #9. The location of the site is shown in Figure 1. Work on other specific sites as well as the freight commodity flow task are on-going and are documented elsewhere.  The sites to be evaluated in .this study were selected from two existing databases (a truck facility survey from 1994 and the intermodal facility inventory) based on ADD and KYTC Highway District planner recommendations, geographic location, distance to the NHS, and the number of trucks accessing the site. Consideration was also made for the freight type handled and transportation modes used.  The site was visited for video recording and data collection as listed in Appendix A. The facility is located at the end of CW Stevens Boulevard approximately 0.5 miles east of KY 1/KY 7, which is part of the National Highway System. The surrounding area is currently being developed. A phone survey was conducted with facility managers early in the study process. The phone survey found that approximately 50 trucks per day access the site. The trucks are generally semi tractor trailers with a maximum length of 53 feet. The freight handled at this facility is primarily meat products. The survey indicated that the traffic signal at the intersection of CW Stevens Boulevard and KY 1/KY 7 is slow, and that the exit ramp from I-64 eastbound does not have a traffic signal. The phone survey information can be found in Appendix B.
Quantum Diffusion and Localization in Disordered Electronic Systems
Creators: name: Wells, P. R.
name: Castro, J. d'Albuquerque e
name: de Queiroz, S. L. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The diffusion of electronic wave packets in one-dimensional systems with on-site, binary disorder is numerically investigated within the framework of a single-band tight-binding model. Fractal properties are incorporated by assuming that the distribution of distances $\ell$ between consecutive impurities obeys a power law, $P(\ell) \sim \ell^{-α}$. For suitable ranges of $α$, one finds system-wide anomalous diffusion. Asymmetric diffusion effects are introduced through the application of an external electric field, leading to results similar to those observed in the case of photogenerated electron-hole plasmas in tilted InP/InGaAs/InP quantum wells.
description: RevTex4, 6 pages, 6 .eps figures: published version
Listening on the Web: an aural "bridge" for ESL learners
Creators: name: Earl, Linda
Publisher: name: University of British Columbia
Year: 2009

description: Interest is widely acknowledged as the prime motivator in listening. The Web, as home to the broadcast media on an enticing on-demand basis, offers second language learners a choice of interesting listening. But, this study maintains, learners can't take advantage of that choice without tools to bridge their comprehension gaps. In an attempt to bridge that gap, a 'prototype' web template called the "Bridge" @  was co-designed by the researcher and Catouzer Inc. using licensed CBC Radio interviews to simulate a lesson interface to the authentic web listening world, thus providing structure where there was none. This research examines whether the Web as a cultural context of choice—"nowness"—gives students more confidence in their own agency to acculturate, and if that agency, in the form of being able to control the form language takes, stimulates more awareness. In short, does listening on the Web lead to acquisition? Five international upper level ESL students from a private school in Vancouver were recruited to participate in seven autonomous listening enrichment sessions. Prior to the study they filled out a Listening Habits Survey, and were pre and post-tested using a truncated version of a TOEFL Listening Test. Data collection was on 8 mm video;students answered questionnaires on camera alone and/or were interviewed by the researcher face-to-face. The subsequent 'thin' ethnographies were analyzed using Constellations, a HyperCard software application for chunking digital data. The stories that emerge address the students' interaction with the web site environment, illuminating their learning styles and listening strategies, and in the end corroborating what is often anecdotal observation that yes, students do enjoy and value using "tools to think with".
Ιστορική Εκπαίδευση και Νέες Τεχνολογίες: μια κριτική παρουσίαση των λογισμικών που έχουν παραχθεί για το μάθημα της ιστορίας
Creators: name: Τζημοπούλου, Αικατερίνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Νέες τεχνολογίες
Διδακτική της ιστορίας
Εκπαιδευτικό λογισμικό
Αξιολόγηση εκπαιδευτικού λογισμικού
Πρωτοβάθμια εκπαίδευση
Δευτεροβάθμια εκπαίδευση
New technologies
Teaching history
Educational software
Software assessment
Check lists
Primary/secondary education

description: Σκοπός της παρούσας μελέτης είναι η κριτική παρουσίαση των εκπαιδευτικών λογισμικών που προορίζονται για αξιοποίηση στη διδασκαλία και μάθηση του μαθήματος της ιστορίας. Στο υλικό διαπραγμάτευσης συμπεριλαμβάνονται οι τίτλοι των εκπαιδευτικών λογισμικών ιστορίας που έχουν αποσπάσει άδεια χρήσης κι έχουν διανεμηθεί σε όλα τα δημόσια σχολεία της Πρωτοβάθμιας και Δευτεροβάθμιας εκπαίδευσης στην Ελλάδα και αφορούν αποκλειστικά το διδακτικό αντικείμενο της ιστορίας.Η δημιουργία του μεθοδολογικού εργαλείου για την αξιολόγησή τους βασίστηκε στη μέθοδο των check-lists. Η κριτική παρουσίαση των εκπαιδευτικών λογισμικών που αποτελούν το δείγμα της μελέτης γίνεται ως προς τα τεχνικά και λειτουργικά χαρακτηριστικά τους, την ποιότητα περιεχομένου και την εκπαιδευτική διάστασή και,τέλος, τη διάδραση με φυσικά πρόσωπα.
description: The aim of the current study is the presentation and assessment of the educational software which is intended to be employed in teaching and learning History. The material under survey includes the titles of the educational software which have received permission of use and, thus, have been distributed to all Greek schools of Primary and Secondary Education and which exclusively pertain to the teaching objective of History. The construction of the methodological tool for their assessment is based on the method of “check-lists”. The critical assessment of the sample of software taken for the present survey is made with respect to their technical and functional characteristics, the quality of their content, the educational dimension and, finally, the interaction with natural persons.
Data Validation
Creators: name: van der Loo, Mark P. J.
name: de Jonge, Edwin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Data validation is the activity where one decides whether or not a particular data set is fit for a given purpose. Formalizing the requirements that drive this decision process allows for unambiguous communication of the requirements, automation of the decision process, and opens up ways to maintain and investigate the decision process itself. The purpose of this article is to formalize the definition of data validation and to demonstrate some of the properties that can be derived from this definition. In particular, it is shown how a formal view of the concept permits a classification of data quality requirements, allowing them to be ordered in increasing levels of complexity. Some subtleties arising from combining possibly many such requirements are pointed out as well.
description: 7 pages, 1 figure. In Wiley StatsRef: Statistics Reference Online (2020)
Global soil bacterial biogeography - archived code and data
Creators: name: Bickel, Samuel
name: Chen, Xi
name: Papritz, Andreas Jürg
name: Or, Dani
Publisher: name: Zenodo
Year: 2019

description: Archived version of the code and data repository: https://gitlab.ethz.ch/bickels/biogeo Original code provided by Xi Chen (xiche@student.ethz.ch) Correspondence to: Samuel Bickel (samuel.bickel@usys.ethz.ch) Affiliation: Soil, Terrestrial and Environmental Physics (STEP); Institute of Biogeochemistry and Pollutant dynamics (IBP); Swiss Federal Institute of Technology (ETH), Zürich
Narratives: fMRI data for evaluating models of naturalistic language comprehension
Creators: name: Nastase, Samuel A.
Publisher: name: Zenodo
Year: 2019
Subjects: language
fMRI
open data

description: How does the human brain construct narratives from a sequence of spoken words? Here we present a benchmark fMRI dataset for evaluating neural models for naturalistic speech perception and narrative comprehension. The ‘Narratives’ collection comprises over 500 scanning runs across more than 300 subjects. The story stimuli comprise over 20 spoken narratives ranging from 3 minutes to ~1 hour in duration, for ~4.5 hours of unique stimuli. Overall, this yields over 300,000 TRs across all subjects and stories, or ~5 days of fMRI data. All data and materials have been standardized and staged for public release. The stories span a variety of media, including commercially-produced radio and internet broadcasts, authors reading written works, professional storytellers performing in front of live audiences, and experimental subjects verbally recalling previous events. Alongside the stimuli, we provide time-stamped word-level transcripts created using a semi-supervised forced-alignment algorithm. MRI data have been organized according to the machine-readable Brain Imaging Data Structure (BIDS) with exhaustive metadata. Anonymized subject labels are linked across stories and include demographic and behavioral variables including age, gender, group or condition, and comprehension score (where available). MRI data are provided with various levels of preprocessing, including volumetric and surface-based spatial normalization, spatial smoothing, and temporal filtering with confound regressors. To more effectively aggregate data across subjects and stories, we developed a variant of hyperalignment that capitalizes on intersubject functional correlation (ISFC) analysis to derive a single connectivity-based shared response space across disjoint datasets. To validate the quality of the data, we applied intersubject correlation (ISC) analysis to each dataset. First, we measured ISCs in early auditory cortex to evaluate the temporal alignment of responses and identify outliers. Next, we performed whole-brain ISC analysis, revealing consistent responses throughout a network of cortical areas supporting language and event representation. Well-curated, naturalistic data have tremendous potential for re-use, and we hope the community will benefit from these data in disentangling the neural mechanisms of language comprehension.
Persistence of Hyperbolic Tori in Generalized Hamiltonian Systems
Creators: name: Liu, Zhenxin
name: Yihe, Dalai
name: Huang, Qingdao
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J40; 70H05; 70K60

description: In this paper we prove the persistence of hyperbolic invariant tori in generalized Hamiltonian systems, which may admit a distinct number of action and angle variables. The systems under consideration can be odd dimensional in tangent direction. Our results generalize the well-known results of Graff and Zehnder in standard Hamiltonians. In our case the unperturbed Hamiltonian systems may be degenerate. We also consider the persistence problem of hyperbolic tori on sub-manifolds.
description: LaTeX, 17 pages
2009 Hermenegildo Díaz Cuyasa recordings
Creators: name: Díaz Cuyasa, Hermenegildo
name: Beier, Christine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: iqu

description: WAV audio recordings of 2 texts, in Iquito followed by Loretano Spanish [unless noted]:
1. CEC: K-iíyaasuújuusana (Eliseo) nakusiaárikɨ waarata kaaya panáani: Mi abuelo finado (Eliseo) sabía curar a la gente: My deceased grandfather (Eliseo) knew how to cure people [Iquito only]
(Iquito: 19m05sec; total 19m21sec)
2. PIP: Jɨɨ́taaraata pɨɨ́-kumáani ítuuyaárikɨ-na pɨ́ɨja taariíyaajaá: Cómo Dios nos quemaba en los tiempos antiguos: How God would burn us long ago
(Iquito: 12m05sec; total: 16m27sec)
Development of a PET/EPRI combined imaging system for assessing tumor hypoxia
Creators: name: Kim, Heejong
name: Epel, Boris
name: Sundramoorthy, Subramanian
name: Tsai, Hsiu-Ming
name: Barth, Eugene
name: Gertsenshteyn, Inna
name: Halpern, Howard
name: Hua, Yuexuan
name: Xie, Qingguo
name: Chen, Chin-Tu
name: Kao, Chien-Min
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Precise quantitative delineation of tumor hypoxia is essential in radiation therapy treatment planning to improve the treatment efficacy by targeting hypoxic sub-volumes. We developed a combined imaging system of positron emission tomography (PET) and electron para-magnetic resonance imaging (EPRI) of molecular oxygen to investigate the accuracy of PET imaging in assessing tumor hypoxia. The PET/EPRI combined imaging system aims to use EPRI to precisely measure the oxygen partial pressure in tissues. This will evaluate the validity of PET hypoxic tumor imaging by (near) simultaneously acquired EPRI as ground truth. The combined imaging system was constructed by integrating a small animal PET scanner (inner ring diameter 62 mm and axial field of view 25.6 mm) and an EPRI subsystem (field strength 25 mT and resonant frequency 700 MHz). The compatibility between the PET and EPRI subsystems were tested with both phantom and animal imaging. Hypoxic imaging on a tumor mouse model using $^{18}$F-fluoromisonidazole radio-tracer was conducted with the developed PET/EPRI system. We report the development and initial imaging results obtained from the PET/EPRI combined imaging system.
description: 12 pages, 6 figures
Καταιγισμοί κοσμικής ακτινοβολίας:
Creators: name: Ατρείδης, Γεώργιος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Κοσμική ακτινοβολία
Καταιγισμοί κοσμικής ακτινοβολίας
Cosmic rary showers
Cosmic rays

description: Οι κοσμικές ακτίνες ή κοσμική ακτινοβολία είναι μία κατηγορία ακτινοβολίας που αποτελείται από σωματίδια υψηλών ενεργειών (που κινούνται δηλαδή με υπερσχετικιστικές ταχύτητες) τα οποία παράγονται σε κάποιο μέρος του Σύμπαντος μακριά από τη Γη και προσκρούουν στην ατμόσφαιρα της Γης με ανιχνεύσιμα αποτελέσματα Η διπλωματική αναφέρεται στους καταιγισμούς που προκαλούν τα σωματίδια της κοσμικής ακτινοβολίας καθώς εισέρχονται στην ατμόσφαιρα της Γης. Αρχικά η διπλωματική περιλαμβάνει μια αναφορά στα είδη των σωματιδίων που αποτελούν την κοσμική ακτινοβολία (πρωτογενής κοσμική ακτινοβολία), στις πηγές της κοσμικής ακτινοβολίας και στην συνέχεια στην αλληλεπίδραση της κοσμικής ακτινοβολίας με την ατμόσφαιρα. Κατόπιν γίνεται μια περιγραφή και μια μαθηματική μελέτη των ηλεκτρομαγνητικών και των αδρονικών καταιγισμών. Οι Cosmic ray showers είναι καταιγισμοί που δημιουργούνται από την αλληλεπίδραση της κοσμικής ακτινοβολίας με την ατμόσφαιρα. Παρατηρήθηκαν αρχικά την δεκαετία του 1920, όταν ένα απλό ίχνος ενός φορτισμένου σωματιδίου παρατηρήθηκε να χωρίζεται σε δυο ίχνη. Οι παρατηρήσεις των καταιγισμών οδήγησαν στην ανάπτυξη της ηλεκτρομαγνητικής θεωρίας των καταιγισμών (electromagnetic cascade theory) την δεκαετία του 1930. Στην συνέχεια ακολουθεί ένας κώδικας σε mathematica που περιγράφει τον ηλεκτρομαγνητικό καταιγισμό που προκύπτει, όταν σωματίδια κοσμικής ακτινοβολίας εισέρχονται με διαφορετικές ενέργειες και σε διαφορετικά ύψη στην ατμόσφαιρα της Γης.
description: The cosmic rays or cosmic radiation are energetic quantum particles originating from space that impinge on Earth's atmosphere. This particles are moved with very big speeds. The results of cosmic rays are what we study. Diplomatic work is reported in the cascades that cause the particles of cosmic rays when they enter in Earth's atmosphere. Initially diplomatic includes a report in the types of particles that constitute the cosmic rays (primary cosmic rays), in the sources of cosmic rays and then in the interaction of cosmic radiation with atmosphere. Then become a description and a mathematic study for electromagnetic and hadronic showers. Cosmic ray showers are cascades that are created by the interaction of cosmic radiation with atmosphere. They were initially observed the decade 1920, when a simple trace of a particle with electric charge was observed that it is separated in two traces. The observations of the cascades led to the growth of electromagnetic showers theory (electromagnetic cascade theory) the decade 1930s. Then follows a code in mathematica that describes the electromagnetic shower that results, when particles of cosmic radiation enter with different energies and in different heights in Earth's atmosphere.
A study of the population of LMXBs in the bulge of M31
Creators: name: Voss, Rasmus
name: Gilfanov, Marat
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The purpose of this study is to explore the population of X-ray point sources in the bulge of M31, with the primary goal to contrast properties of various subpopulations, such as persistent and transient sources, primordial LMXBs and dynamically formed ones. Based on the data from 26 archival Chandra observations we study the source content and properties of various subpopulations of X-ray sources to a maximum distance of 12 arcmin from the centre of M31. A study of the spatial distribution and the luminosity function of the X-ray sources shows that the distribution of primordial LMXBs is consistent with the distribution of the K-band light and that their luminosity function flattens below ~10^{37} erg/s to the dN/dL proportional to 1/L law in agreement with the behaviour found earlier for LMXBs in the Milky Way and in Cen A. The luminosity function of dynamically formed LMXBs shows a prominent fall-off below log(L_X)<36.5. Although the statistics is insufficient to claim a genuine low-luminosity cut-off in the luminosity function, the best fit powerlaw with a slope of -0.6+-0.2 is significantly flatter than the dN/dL proportional to 1/L law. We found 28 transient X-ray sources. Their spatial distribution follows the distribution of the persistent LMXBs within the accuracy allowed by the limited number of transients.
description: 15 pages, accepted for publication in A&A revised version includes a comparison of the LF of LMXBs in globular clusters in M31 and in the Galaxy
Nuclear dynamics of singlet exciton fission: a direct observation in pentacene single crystals
Creators: name: Seiler, Hélène
name: Krynski, Marcin
name: Zahn, Daniela
name: Hammer, Sebastian
name: Windsor, Yoav William
name: Vasileiadis, Thomas
name: Pflaum, Jens
name: Ernstorfer, Ralph
name: Rossi, Mariana
name: Schwoerer, Heinrich
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Singlet exciton fission (SEF) is a key process in the development of efficient opto-electronic devices. An aspect that is rarely probed directly, and yet has a tremendous impact on SEF properties, is the nuclear structure and dynamics involved in this process. Here we directly observe the nuclear dynamics accompanying the SEF process in single crystal pentacene using femtosecond electron diffraction. The data reveal coherent atomic motions at 1 THz, incoherent motions, and an anisotropic lattice distortion representing the polaronic character of the triplet excitons. Combining molecular dynamics simulations, time-dependent density functional theory and experimental structure factor analysis, the coherent motions are identified as collective sliding motions of the pentacene molecules along their long axis. Such motions modify the excitonic coupling between adjacent molecules. Our findings reveal that long-range motions play a decisive part in the disintegration of the electronically correlated triplet pairs, and shed light on why SEF occurs on ultrafast timescales.
Fabrication and Characterization of Short Josephson Junctions with Stepped Ferromagnetic Barrier
Creators: name: Peralagu, Uthayasankaran
name: Weides, Martin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present novel low-T_c superconductor-insulator-ferromagnet-superconductor (SIFS) Josephson junctions with planar and stepped ferromagnetic interlayer. We optimized the fabrication process to set a step in the ferromagnetic layer thickness. Depending on the thickness of the ferromagnetic layer the ground state of the SIFS junction has a phase drop of either 0 or pi. So-called 0-pi Josephson junctions, in which 0 and pi ground states compete with each other, were obtained. These stepped junctions may have a double degenerate ground state, corresponding to a vortex of supercurrent circulating clock- or counterclockwise and creating a magnetic flux which carries a fraction of the magnetic flux quantum Φ_0. Here, we limit the presentation to static properties of short junctions.
description: modified version, small changes
Possible Signals of Wino LSP at the Large Hadron Collider
Creators: name: Ibe, M.
name: Moroi, Takeo
name: Yanagida, T. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a class of anomaly-mediated supersymmetry breaking models where gauginos acquire masses mostly from anomaly mediation while masses of other superparticles are from Kahler interactions, which are as large as gravitino mass, O(10-100) TeV. In this class of models, the neutral Wino becomes the lightest superparticle in a wide parameter region. The mass splitting between charged and neutral Winos are very small and experimental discovery of such Winos is highly non-trivial. We discuss how we should look for Wino-induced signals at Large Hadron Collider.
description: 15 pages, 3 figures
Σχέση μαθησιακής και πρώιμης μαθηματικής επάρκειας σε παιδιά προσχολικής ηλικίας
Creators: name: Αντιφάκου, Κυριακή Μερκούριου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Μαθησιακή επάρκεια
Πρώιμη μαθηματική επάρκεια
Γνωστικό ύφος
Μέθοδοι επεξεργασίας
Μαθησιακή ετοιμότητα
Σχολικές δυσκολίες
Cognitive style
Learning awareness
Early mathematical competence
Learning competence

description: Η παρούσα έρευνα αφορά στη σχέση της μαθησιακής επάρκειας και της πρώιμης μαθηματικής επάρκειας μαθητών προσχολικής και πρώτης σχολικής ηλικίας με και χωρίς δυσκολίες μάθησης. Επίσης, στην εργασία διαφαίνεται η σχέση των μεθόδων επεξεργασίας και της μαθησιακής και πρώιμης μαθηματικής επάρκειας των μαθητών
description: This report refers to the relationship between early mathematical competence and learning competence of students with and without learning difficulties. It also refers to the relationship between cognitive style and early mathematical competence and learning competence of the students of preschool years
Novel two-phase method for supercritical water flow
Creators: name: Tripathi, Piyush Mani
name: Basu, Saptarshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The current resurgence in the phase diagram study beyond the critical point has questioned the conventional belief of supercritical fluid as a single phase with varying properties. On the same line, a novel two-phase approach has been proposed to study the supercritical flow with heat transfer deterioration (HTD) phenomena. The Volume of Fluid (VOF) multiphase model has been used to analyze the flow, and the simulation result reasonably predicts the wall temperature peaks. Moreover, the velocity and turbulent kinetic energy profiles for different axial locations explain the occurrence of HTD, and it is on par with the pre-existing numerical method. Besides, the quantitative analysis presented in the paper expounds on qualitative understanding. The parametric study of the thermophysical properties revealed that the density variation is the primary cause of HTD in supercritical flows. So banking on this conclusion, the propounded study focuses on the forces generated due to the density variation. This technique equips us with a holistic picture of the supercritical flows. It leads to the inference that for no HTD effects to be present, buoyancy and inertia forces have to be of comparable magnitude throughout the flow. In addition, the pseudo phase change model outclasses the existing research by rendering us the volume fraction data. Mapping of this variable reveals a sudden jump in the lighter phase's thickness near the wall at the site of HTD, which is also reflected as a maximum in the nondimensional two-phase thickness (P) plot. Nevertheless, this observation is only restricted to HTD caused by buoyancy. In the end, a theoretical expression has been conceptualized for computing the two-phase thickness (h) value, which can serve as a fundamental length scale in supercritical flows as it marks the region of highest property gradient near the wall.
description: 30 pages, 14 figures
Σχολικές επιδόσεις και εισαγωγή στο Πανεπιστήμιο: η περίπτωση του γυμνασίου του Πειραματικού Σχολείου του Πανεπιστημίου Θεσσαλονίκης (1950-1967)
Creators: name: Λιάμπας, Γεώργιος Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Πειραματικό σχολείο Πανεπιστημίου Θεσσαλονίκης
Σχολικές επιδόσεις
Experimental school
School achievement

description: Η εργασία διερευνά την κοινωνική λειτουργία, του Πειραματικού Σχολείου του Πανεπιστημίου Θεσσαλονίκης (ΠΣΠΘ), στο οποίο υλοποιήθηκαν, σε μεγάλο βαθμό, οι αντιλήψεις του φιλελεύθερου εκπαιδευτικού ρεύματος στην εκπαίδευση. Η συλλογή, διερεύνηση κι επεξεργασία του συνόλου των στοιχείων του αρχειακού υλικού (1950-1967), που αφορούν την αποτύπωση των στόχων, των γενικών αρχών λειτουργίας, του πλαισίου της σχολικής ζωής, των κοινωνικών χαρακτηριστικών των μαθητών, τη σχολική τους επίδοση και τη μεταξύ τους συσχέτιση, έδειξαν ότι: α) το ΠΣΠΘ στελεχώνεται από μαθητές οικογενειών υψηλού μορφωτικού κεφαλαίου β) το πλαίσιο αυστηρής επιλογής και υψηλών απαιτήσεων, από την πλευρά του Σχολείου, συμβάλλει στην καθολική σχεδόν εισαγωγή των μαθητών στα ΑΕΙ γ) το ΠΣΠΘ επικυρώνει και αναπαράγει την κοινωνικά προνομιακή σχέση με την επιτυχή σχολική σταδιοδρομία των συγκεκριμένων μαθητών δ) η συγκεκριμένη κοινωνική λειτουργία του ΠΣΠΘ ευνοεί τη σιωπηρή μεταλλαγή του χαρακτήρα του Σχολείου από πειραματικό σε κοινωνικής διάκρισης.
description: The dissertation examines the social role and function of the Experimental School of University of Thessaloniki (PSPTH), where part of the liberal-progressive realizations of the Greek educational policies have been realized and applied in practice during the post-war period (1950-1967).The collection, revision and articulation of the overall research data from the archives of the Experimental School of University of Thessaloniki (PSPTH) – data concerning and reflecting the actual aims, the main principles and frames of school life, school attainment, school competence and internal assessment – has demonstrated that: (i). on the whole the PSPTH’s student originate from families of enriched cultural capital, (ii). the austere structure regulating the Schools’ implementation of National Curriculum in relation to the pedagogic methods adopted, resulted to attain extremely high students’ achievement continuing at tertiary education in a period of time where educational career has been closely correlated with social mobility, (iii). the PSPTH confirm and reproduce the social privileges relevant to a successful and promising school progress of the particular student population, (iv). the specific social function of the PSPTH has transformed, eventually, the character and disposition of the school from its progressive qualities to a mere institution of social distinction, segregation and division.
Massloss from viscous advective disc
Creators: name: Chattopadhyay, Indranil
name: Das, Santabrata
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Rotating transonic flows are long known to admit standing or oscillating shocks and that the excess thermal energy in the post shock flow drives a part of the infalling matter as bipolar outflows. We compute massloss from a viscous advective disc. We show that the mass outflow rate decreases with increasing viscosity of the accretion disc, since viscosity weakens the centrifugal barrier that generates the shock. We also show that the optical depth of the post-shock matter decreases due to massloss which may soften the spectrum from such a mass losing disc.
description: 14 pages, 7 figures, accepted in New Astronomy
Behaviour of dissipative accretion flows around black holes
Creators: name: Das, Santabrata
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the behaviour of dissipative accreting matter close to a black hole as it provides the important observational features of galactic and extra-galactic black holes candidates. We find the complete set of global solutions in presence of viscosity and synchrotron cooling. We show that advective accretion flow can have standing shock wave and the dynamics of the shock is controlled by the dissipation parameters (both viscosity and cooling). We study the effective region of the parameter space for standing as well as oscillating shock. We find that shock front always moves towards the black hole as the dissipation parameters are increased. However, viscosity and cooling have opposite effects in deciding the solution topologies. We obtain two critical cooling parameters that separate the nature of accretion solution.
description: 11 pages, 11 figures, submitted to MNRAS
Generating the curvature perturbation with instant preheating
Creators: name: Matsuda, Tomohiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A new mechanism for generating the curvature perturbation at the end of inflaton has been investigated. The dominant contribution to the primordial curvature perturbation may be generated during the period of instant preheating. The mechanism converts isocurvature perturbation related to a light field into curvature perturbation, where the ``light field'' is not the inflaton field. This mechanism is important in inflationary models where kinetic energy is significant at the end of inflaton. We show how one can apply this mechanism to various brane inflationary models.
description: 17 pages, 1 figure, To appear in JCAP
Inhomogeneous backflow transformations in quantum Monte Carlo calculations
Creators: name: Lopez-Rios, P.
name: Ma, A.
name: Drummond, N. D.
name: Towler, M. D.
name: Needs, R. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: An inhomogeneous backflow transformation for many-particle wave functions is presented and applied to electrons in atoms, molecules, and solids. We report variational and diffusion quantum Monte Carlo VMC and DMC energies for various systems and study the computational cost of using backflow wave functions. We find that inhomogeneous backflow transformations can provide a substantial increase in the amount of correlation energy retrieved within VMC and DMC calculations. The backflow transformations significantly improve the wave functions and their nodal surfaces.
description: ~20 pages, 11 figures
Nanoscale vector electric field imaging using a single electron spin
Creators: name: Barson, M. S. J
name: Oberg, L. M.
name: McGuinness, L. P.
name: Denisenko, A.
name: Manson, N. B.
name: Wrachtrup, J.
name: Doherty, M. W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ability to perform nanoscale electric field imaging of elementary charges at ambient temperatures will have diverse interdisciplinary applications. While the nitrogen-vacancy (NV) center in diamond is capable of high-sensitivity electrometry, demonstrations have so far been limited to macroscopic field features or detection of single charges internal to diamond itself. In this work we greatly extend these capabilities by using a shallow NV center to image the electric field of a charged atomic force microscope tip with nanoscale resolution. This is achieved by measuring Stark shifts in the NV spin-resonance due to AC electric fields. To achieve this feat we employ for the first time, the integration of Qdyne with scanning quantum microscopy. We demonstrate near single charge sensitivity of $η_e = 5.3$ charges/$\sqrt{\text{Hz}}$, and sub-charge detection ($0.68e$). This proof-of-concept experiment provides the motivation for further sensing and imaging of electric fields using NV centers in diamond.
Neuronale Netze und Fuzzy-Systeme
Creators: name: Korimort, Thomas
Publisher: name: Zenodo
Year: 1996
Subjects: Neuronale Netze
Fuzzy Logic
Perzeptronen
Fuzzy Theorie
Fuzzy Systeme

description: Meine Fachbereichsarbeit zum Thema neuronale Netze und Fuzzy Systeme zwecks Absolvierung meiner Matura am Gymnasium Neunkirchen, Niederösterreich im Jahr 1996.
description: {"references": ["D. Nauck, F. Klawonn, R. Kruse: Neuronale Netze und Fuzzy-Systeme. Vieweg, Wiesbaden, 1994.", "H. Ritter, T. Martinetz, K. Schulten: Neuronale Netze - Eine Einf\u00fchrung in die Neuroinformatik selbstorganisierender Netzwerke. Addison-Wesely, M\u00fcnchen/Bonn, 1. Nachdruck 1992.", "J. Kahlert, H. Frank: Fuzzy-Logik und Fuzzy-Control. Vieweg, Wiesbaden/Braunschweig, 1993.", "B. Demant: Fuzzy-Theorie oder Die Faszination des Vagen. Vieweg, Braunschweig/Wiesbaden, 1993.", "R. Kruse, J. Gebhardt, F. Klawonn: Fuzzy-Systeme. B.G.Teubner, Stuttgart, 1993.", "R. Kruse, D. Nauck, F. Klawonn: Neuronale Fuzzy-Systeme. In Spektrum der Wissenschaften, Juni 1995, pp. 34-41.", "S. Guttenberger: Fuzzy-Logik. In DOS International, Mai 1995, pp. 211-213, DMV-Verlag.", "M. Roth. Auf den Spuren des menschlichen Gehirns - Kohonen-Netze. In DOS International, Oktober 1993, pp. 196-203, DMV-Verlag."]}
The Measurement Process in Relational Quantum Mechanics
Creators: name: Jennings, B. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Understanding the quantum measurement problem is closely associated with understanding wave function collapse. Motivated by Breuer's claim that it is impossible for an observer to distinguish all states of a system in which it is contained, wave function collapse is tied to self observation in the Schmidt biorthonormal decomposition of entangled systems. This approach provides quantum mechanics in general and relational quantum mechanics in particular with a clean, well motivated explanation of the measurement process and wave function collapse.
Enhanced spin relaxation time due to electron-electron scattering in semiconductors
Creators: name: Leyland, W. J. H.
name: John, G. H.
name: Harley, R. T.
name: Glazov, M. M.
name: Ivchenko, E. L.
name: Ritchie, D. A.
name: Shields, A. J.
name: Henini, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a detailed experimental and theoretical analysis of the spin dynamics of two-dimensional electron gases (2DEGs) in a series of n-doped GaAs/AlGaAs quantum wells. Picosecond-resolution polarized pump-probe reflection techniques were applied in order to study in detail the temperature-, concentration- and quantum-well-width- dependencies of the spin relaxation rate of a small photoexcited electron population. A rapid enhancement of the spin life-time with temperature up to a maximum near the Fermi temperature of the 2DEG was demonstrated experimentally. These observations are consistent with the D'yakonov-Perel' spin relaxation mechanism controlled by electron-electron collisions. The experimental results and theoretical predictions for the spin relaxation times are in good quantitative agreement.
description: 8 pages, 5 figures
The Correlation Between Spectral Index And Accretion Rate For AGN
Creators: name: Zhang, Xue-Guang
name: Dultzin, Deborah
name: Wang, Ting-Gui
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, we present a correlation between the spectral index distribution (SED) and the dimensionless accretion rate defined as $\dot{m}={L_{bol}/L_{Edd}}$ for AGN. This quantity is used as a substitute of the physical accretion rate. We select 193 AGN with both broad H$α$ and broad H$β$, and with absorption lines near MgI$\lambda5175Å$ from SDSS DR4. We determine the spectral index and dimensionless accretion rate after correcting for both host galaxy contribution and internal reddening effects. A correlation is found between the optical spectral index and the dimensionless accretion rate for AGN, including low luminosity AGN ($L_{Hα}<10^{41}{\rm erg\cdot s^{-1}}$ sometimes called "dwarf AGN" (Ho et al. 1997)). The existence of this correlation provides an independent method to estimate the central BH masses for all types of AGN. We also find that there is a different correlation between the spectral index and the BH masses for normal AGN and low luminosity AGN, which is perhaps due to the different accretion modes in these two types of nuclei. This in turn may lead to the different correlations between BH masses and optical continuum luminosity reported previously (Zhang et al. 2007a), which invalidates the application of the empirical relationship found by Kaspi et al. (2000, 2005) to low luminosity AGN in order to determine their BLR sizes.
description: 10 pages, 7 figures, accepted for publication in MNRAS
title: Privacy as a factor in residential buildings and site development: an annotated bibliography
Creators: name: Hedley, A.
Publisher: name: National Research Council of Canada. Division Of Building Research
Year: 1966

description: The Division of Building Research of the National Research Council of Canada is pleased to publish this bibliography. A study of Privacy comprised one part of the research project on site planning currently being carried out at the University of British Columbia.The various studies of fire, sound, light and privacy included in this project as factors that determine the spacing of residential buildings are being used as a basis for the preparation of a master report on Performance Standards for Space and Site Planning for Residential Development.