cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Περιβαλλοντικοί πρόσφυγες και η πρόκληση για τη διεθνή προστασία τους
Creators: name: Τυχάλα, Στέλλα Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Περιβαλλοντικοί πρόσφυγες
Κλιματική αλλαγή
Ανθρώπινα δικαιώματα
Επικουρική προστασία
Νησιά υπό βύθιση
Environmental refugees
Climate change
Human rights
Complementary protection
Sinking islands

description: Σκοπός της παρούσας εργασίας είναι η ανάδειξη του ζητήματος σχετικά με την προστασία των περιβαλλοντικών προσφύγων. Με δεδομένο ότι μέχρι σήμερα δεν υπάρχει κάποια διεθνής συνθήκη η οποία να παρέχει πλήρη αναγνώριση και προστασία στην κατηγορία αυτή, εξετάζεται κατά πόσο θα μπορούσε να εξασφαλισθεί η προστασία της με βάση τη Σύμβαση της Γενεύης του 1951 καθώς και υπό το καθεστώς περιφερειακών συμβάσεων που αφορούν τους πρόσφυγες. Στη συνέχεια, διερευνάται αν η προστασία μπορεί να βασιστεί στην κρατική ευθύνη για μη συμμόρφωση στις περιβαλλοντικές συνθήκες( με αναφορά στα άρθρα της ΕΔΔ) σε συνδυασμό και με την αρχή της κοινής αλλά διαφοροποιημένης ευθύνης. Τέλος, η ανάλυση συνεχίζεται με την προσωρινή προστασία σε κρατικό επίπεδο καθώς και με την επικουρική προστασία και εξετάζεται κατά πόσο υπάρχει περίπτωση εφαρμογής της αρχής της μη επαναπροώθησης στην περίπτωση των περιβαλλοντικών προσφύγων.
description: The purpose of this thesis is to highlight the issue regarding the protection of the environmental refugees. Given that there is not an international convention which fully recognizes and protects this category of refugees, this study examines the possibility that the 1951 Geneva Convention or other regional refugee conventions provide protection. The research proceeds with the state responsibility in the event of non compliance with the environmental conventions in combination with the concept of common but differentiated responsibilities. Consequently, the analysis goes on with the temporary protection provided by the states as well as complementary protection and the principle of non refoulement in the case of environmental refugees.
Persistent Supercurrent Atom Chip
Creators: name: Mukai, T.
name: Hufnagel, C.
name: Kasper, A.
name: Meno, T.
name: Tsukada, A.
name: Semba, K.
name: Shimizu, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Rubidium 87 atoms are trapped in an Ioffe-Pritchard potential generated with a persistent supercurrent that flows in a loop circuit patterned on a sapphire surface. The superconducting circuit is a closed loop made of 100 micro meter wide MBE-grown MgB2 stripe carrying a supercurrent of 2.5 A. To control the supercurrent in the stripe, an on-chip thermal switch operated by a focused argon-ion laser is developed. The switch operates as an on/off switch of the supercurrent, or as a device to set the current to a specific value with the aid of an external magnetic field. The current can be set even without an external source if the change is in decreasing direction.
description: 4 pages, 5 figures
Об использовании пресных подземных вод засушливых регионов мира в борьбе с опустыниванием земель
Creators: name: З. Г. Залибеков
name: С. А. Мамаев
name: А. Б. Биарсланов
name: Р. А. Магомедов
name: Д. Б. Асгерова
name: У. М. Галимова
Publisher: name: Аридные экосистемы
Year: 2019
Subjects: опустынивание
щелочность почв
подземные пресные воды
капельное орошение
устойчивость к засухе
диафрагменный способ
дельтовые равнины

description: Разработаны теоретические основы и принципы использования пресных подземных вод (ППВ) и их роль в борьбе с опустыниванием и в освоении биологического потенциала засушливых земель. Выявлены преимущества ППВ по сравнению с поверхностными поливными водами: защищенность от загрязнения, испарения, охрана природных запасов и их естественная возобновляемость. Приведены площади аридных земель по континентам, различия в глубине залегания ППВ и параметры рекомендуемого вида капельного орошения на примере одного из аридных регионов Терско-Кумской артезианской низменности. Показано естественное возобновление и близкое по сравнению с условиями экваториальной Африки залегание к поверхности ППВ в дельтово-аллювиальных равнинах Евразии.
An alternative configuration with one central warehouse for a sportswear retail company
Creators: name: Τριανταφυλλίδου, Ευθυμία Ανέστη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Διοίκηση εφοδιαστικής αλυσίδας
Κεντρική διαχείρηση
Διαχείρηση
Supply chain management
Centralization
Decentralization

description: This study focused on a fashion industry and its supply chain operations. More specifically it examined a sportswear supply chain company that involves retail and e-shop respectively. Its supply chain policy was examined in order to understand how it operates in detail, and to identify possible errors in its system. A literature review was adopted to identify current study trends and results and to classify root causes and measures needed in order to reduce errors during this configuration that follows the company. An abc analysis is conducted and an alternative configuration with one central warehouse is examined in order to improve company’s processes and reduce costs. All the calculations were conducted on excel, while a sensitivity analysis was also examined.
description: Η παρούσα διπλωματική εργασία αφορά την διαχείρηση εφοδιαστικής αλυσίδας λιανεμπορίου. Συγκεκριμένα, εξετάζει τον τρόπο λειτουργίας και διαχείρησης της εφοδιαστικής αλυσίδας μίας εταιρίας λιανεμπορίου αθλητικών ειδών, η οποία εξυπηρετεί το αγοραστικό κοινό, όχι μόνο μέσω των φυσικών καταστημάτων, αλλά και μέσω της ηλεκτρονικής της ιστιοσελίδας (e-shop). Σκοπός της εργασίας αυτής είναι να εντοπίσει τις δυσλειτουργίες και τα προβλήματα της οργάνωσης της συγκεκριμένης εταιρίας και να εφαρμόσει μία νέα οργάνωση με μία κεντρική αποθήκη, η οποία θα τροφοδοτεί τα καταστήματα ανάλογα με τη ζήτηση και θα εξυπηρετεί το αγοραστικό κοινό της ηλεκτρονικής ιστιοσελίδας. Ύστερα από την ολοκλήρωση μίας abc analysis, επιλέχθηκαν δύο προϊόντα ουτοσώστε να εξετασθούν τα κόστη και τα κέρδη της υπάρχουσας και της νέας οργάνωσης μέσω excel. Τέλος, παρουσιάζεται μία ανάλυση ευαισθησίας με 3 σενάρια και για τις δύο οργανώσεις.
Surface electromagnetic waves at gradual interfaces between lossy media
Creators: name: Smolyaninov, Igor I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A low loss propagating electromagnetic wave is shown to exist at a gradual interface between two lossy conductive media. The electromagnetic frequency range of this phenomenon may span from UV optics to RF range. In particular, it is demonstrated that such a surface wave may be guided by a seafloor-seawater interface and it may be used in radio communication and imaging underwater. Similar surface waves may also be guided by various tissue boundaries inside a human body. For example, such surface wave solutions may exist at planar interfaces between skull bones and grey matter inside a human head at 6 GHz.
description: 5 pages, 7 figures
Discovery of extremely low-metallicity circumgalactic gas at $z = 0.5$ toward Q0454-220
Creators: name: Norris, Jackson M.
name: Muzahid, Sowgat
name: Charlton, Jane C.
name: Kacprzak, Glenn G.
name: Wakker, Bart P.
name: Churchill, Christopher W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have obtained new observations of the absorption system at $z_\mathrm{abs}=0.48$ toward QSO Q0454-220, which we use to constrain its chemical and physical conditions. The system features metal-enriched gas and previously unknown low-metallicity gas detected $\sim 200 \, \mathrm{km \, s^{-1}}$ blueward of the metal-enriched gas. The low-metallicity gas is detected in multiple Lyman series lines but is not detected in any metal lines. Our analysis includes low-ionization (e.g., Fe II, Mg II) metal lines, high-ionization (e.g., C IV, O VI, N V) metal lines, and several Lyman series lines. We use new UV spectra taken with HST/COS along with data taken from HST/STIS, Keck/HIRES, and VLT/UVES. We find that the absorption system can be explained with a photoionized low-ionization phase with $\mathrm{[Fe/H]} \sim -0.5$ and $n_\mathrm{H} \sim 10^{-2.3} \, \mathrm{cm}^{-3}$, a photoionized high-ionization phase with a conservative lower limit of $-3.3 < \mathrm{[Fe/H]}$ and $n_\mathrm{H} \sim 10^{-3.8} \, \mathrm{cm}^{-3}$, and a low-metallicity component with a conservative upper limit of $\mathrm{[Fe/H]} < -2.5$ that may be photoionized or collisionally ionized. We suggest that the low-ionization phase may be due to cold-flow accretion via large-scale filamentary structure or due to recycled accretion while the high-ionization phase is the result of ancient outflowing material from a nearby galaxy. The low-metallicity component may come from pristine accretion. The velocity spread and disparate conditions among the absorption system's components suggest a combination of gas arising near galaxies along with gas arising from intergroup material.
description: 18 pages, 9 figures; updated author affiliation
Inhomogeneous surface distribution of chemical elements in the eclipsing binary AR Aur: A new challenge for our understanding of HgMn stars
Creators: name: Hubrig, S.
name: Gonzalez, J. F.
name: Savanov, I.
name: Schoeller, M.
name: Ageorges, N.
name: Cowley, C. R.
name: Wolff, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a high spectral resolution study of the eclipsing binary AR Aur. AR Aur is the only known eclipsing binary with a HgMn primary star exactly on the ZAMS and a secondary star still contracting towards the ZAMS. We detect for the first time in the spectra of the primary star that for many elements the line profiles are variable over the rotation period. The strongest profile variations are found for the elements Pt, Hg, Sr, Y, Zr, He and Nd, while the line profiles of O, Na, Mg, Si, Ca, Ti, and Fe show only weak distortions over the rotation period. The slight variability of He and Y is also confirmed by the study of high resolution spectra of another HgMn star: alpha And. A preliminary modelling of the inhomogeneous distribution has been carried out for Sr and Y. Our analysis shows that these elements are very likely concentrated in a fractured ring along the rotational equator. It may be an essential clue for the explanation of the origin of the chemical anomalies in HgMn stars (which are very frequently found in binary and multiple systems) that one large fraction of the ring is missing exactly on the surface area which is permanently facing the secondary, and another small one on the almost opposite side. The results presented about the inhomogeneous distribution of various chemical elements over the stellar surface of the primary suggest new directions for investigations to solve the question of the origin of abundance anomalies in B-type stars with HgMn peculiarity.
description: 6 pages, 4 figures, accepted for publication in MNRAS
О сейсмичности аридной зоны Северо-Восточного Кавказа
Creators: name: Ш. Г. Идармачев
name: В. И. Черкашин
name: М. А. Мусаев
name: А. Ш. Идармачев
Publisher: name: Аридные экосистемы
Year: 2019
Subjects: сейсмичность
очаг землетрясения
магнитуда землетрясения
каталог землетрясения
эпицентр землетрясения
аридные зоны
ландшафт
активные разломы

description: Впервые исследована связь распределения эпицентров сильных землетрясений с аридными зонами на территории Северо-Восточного Кавказа. Северная часть аридной зоны, расположенная на территории Скифско-Туранской платформы, характеризуется асейсмичностью, землетрясения располагаются южнее границы аридной зоны. Узкая часть прибрежной аридной зоны совпадает с расположением глубинных разломов: Срединный и Прибрежный, тектоническая активность которых характеризуется возникновением очагов сильных землетрясений.
Magnonics in collinear magnetic insulating systems
Creators: name: Flebus, Benedetta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the last decades, collinear magnetic insulating systems have emerged as promising energy-saving information carriers. Their elementary collective spin excitations, i.e., magnons, can propagate for long distances bypassing the Joule heating effects that arise from electron scattering in metal-based devices. This tutorial article provides an introduction to theoretical and experimental advances in the study of magnonics in collinear magnetic insulating systems. We start by outlining the quantum theory of spin waves in ferromagnetic and antiferromagnetic systems and we discuss their quantum statistics. We review the phenomenology of spin and heat transport of the coupled coherent and incoherent spin dynamics and the interplay between magnetic excitations and lattice degrees of freedom. Finally, we introduce the reader to the key ingredients of two experimental probes of magnetization dynamics, spin transport and NV-center relaxometry setups, and discuss experimental findings relevant to the outlined theory.
Меловые возвышенности оренбургской области – уникальные местообитания редких видов растений и растительных сообществ
Creators: name: Я. М. Голованов
name: Л. М. Абрамова
Publisher: name: Аридные экосистемы
Year: 2019
Subjects: Оренбургская область
меловые возвышенности
редкие и эндемичные виды

description: В период с 2014 по 2017 гг. проведены флористические, геоботанические и популяционнобиологические исследования на 9 меловых возвышенностях степной зоны Оренбургской области, характеризующихся высокой специфичностью и долей редких и эндемичных видов. Флористические исследования проводились широко распространенным маршрутным методом. Оценка природоохранной значимости дана по 8 показателям, принятым в фитоценотических работах (флористическая и фитоценотическая значимость, распространение, естественность, сокращение площади, восстанавливаемость, категория охраны, охваченность охраной). На исследованных массивах выявлено 40 видов, занесенных в Красные книги различного ранга и 15 эндемиков. Наибольшее число редких видов растений отмечено для Верхнечибендинских и Троицких меловых гор (по 26 видов), которые являются наибольшими по площади и слабо нарушенными эталонными меловыми массивами области. Высокая концентрация редких видов растений наблюдается в солянковиднополынных (24 вида) и пустынножитняковых сообществах (25 видов). При оценке природоохранной значимости наивысшие баллы по интегральному показателю «категория охраны» получили ежовниковые, тасбиюргуновые и пупавковые сообщества. Оценка состояния популяций 6 редких видов растений на исследуемых меловых массивах показала, что при усилении антропогенной нагрузки происходит снижение жизненности популяций. Отмечена необходимость охраны четырех не охраняемых на сегодня меловых возвышенностей и выходов мела в Оренбургской области.
Young Stars in the Camelopardalis Dust and Molecular Clouds. II. Infrared Objects
Creators: name: Straizys, V.
name: Laugalys, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using infrared photometric data extracted from the 2MASS, IRAS and MSX databases, 142 suspected young stellar objects (YSOs) are selected from about 2 million stars in the Camelopardalis segment of the Milky Way limited by Galactic longitude 132-158 deg, latitude pm 12 deg. According to radial velocities of the associated CO clouds, the objects are attributed to three molecular and dust cloud layers at 150--300 pc, 900 pc and 2.2 kpc distances from the Sun. These objects concentrate into dust and molecular clouds and exhibit extremely large reddenings (A_V up to 25 mag) which can be caused by the dust in foreground clouds and circumstellar envelopes or disks. In the J-H vs. H-K diagram these objects lie above the intrinsic line of T Tauri variables, roughly along the black-body line. Among the identified objects, some already known YSOs are present, including the well investigated massive object GL 490. The spectral energy distributions between 700 nm and 100 mum suggest that the objects may be YSOs of classes I, II and III. However, we do not exclude the possibility that a small fraction of the objects, especially those without IRAS and MSX photometry, may be unrecognized heavily reddened OB-stars, late-type AGB stars or even galaxies.
Современное состояние растительности острова Возрождения (Узбекистан)
Creators: name: Х. Ф. Шомуродов
name:  Б. А. Адилов
Publisher: name: Аридные экосистемы
Year: 2019
Subjects: флора
растительность
остров Возрождения
плато Устюрт
Кызылкум
эндемики.

description: Установлен предварительный флористический состав сосудистых растений острова Возрождения (анклав Аральского моря) в пределах его в каракалпакской части (Узбекистан), насчитывающий 123 вида из 90 родов и 31 семейства. По богатству видов спектр ведущих семейств возглавляют семейства Chenopodiaceae Vent., Asteraceae Dumort., Fabaceae Lindl. и Poaceae Barnhart. Показаны сходства (на примере биюргунников (Anabasis salsa) и полынников (Artemisia terrae-albae)) и отличительные черты (на примере Salsola arbusculiformis, не выступающего как доминант и отсутствия растительных комплексов, состоящих из биюргунников, полынников и боялышников) растительности острова с Устюртом. С другой стороны, большие участки острова, занимаемые сообществами кейреука (Salsola orientalis) и черного саксаула (Haloxylon aphyllum), напоминают отдельные экотопы Кызылкума. Преобладание в отдельных частях острова формации Artemisia terrae-albae связано с низким антропогенным воздействием благодаря изолированности острова от материка достаточно длительное (долгое) время.
The Tale of Two Localization Technologies: Enabling Accurate Low-Overhead WiFi-based Localization for Low-end Phones
Creators: name: Shokry, Ahmed
name: Elhamshary, Moustafa
name: Youssef, Moustafa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: WiFi fingerprinting is one of the mainstream technologies for indoor localization. However, it requires an initial calibration phase during which the fingerprint database is built manually. This process is labour intensive and needs to be repeated with any change in the environment. While a number of systems have been introduced to reduce the calibration effort through RF propagation models or crowdsourcing, these still have some limitations. Other approaches use the recently developed iBeacon technology as an alternative to WiFi for indoor localization. However, these beacon-based solutions are limited to a small subset of high-end phones. In this paper, we present HybridLoc: an accurate low-overhead indoor localization system. The basic idea HybridLoc builds on is to leverage the sensors of high-end phones to enable localization of lower-end phones. Specifically, the WiFi fingerprint is crowdsourced by opportunistically collecting WiFi-scans labeled with location data obtained from BLE-enabled high-end smart phones. These scans are used to automatically construct the WiFi-fingerprint, that is used later to localize any lower-end cell phone with the ubiquitous WiFi technology. HybridLoc also has provisions for handling the inherent error in the estimated BLE locations used in constructing the fingerprint as well as to handle practical deployment issues including the noisy wireless environment, heterogeneous devices, among others. Evaluation of HybridLoc using Android phones shows that it can provide accurate localization in the same range as manual fingerprinting techniques under the same conditions. Moreover, the localization accuracy on low-end phones supporting only WiFi is comparable to that achieved with high-end phones supporting BLE. This accuracy is achieved with no training overhead, is robust to the different user devices, and is consistent under environment changes.
Пространственная структура популяций Prunus armeniaca L. в аридных редколесьях Внутригорного Дагестана
Creators: name: З. М. Асадулаев
name: Д. М. Анатов
Publisher: name: Аридные экосистемы
Year: 2019
Subjects: Prunus armeniaca L.
Внутригорный Дагестан
аридные редколесья
ценопопуляции
пространственная структура
плотность
высота над уровнем моря
крутизна склонов
критерии согласия Шапиро-Уилка и хи-квадрата

description: Во Внутригорном Дагестане на трех высотных уровнях изучена пространственная структура ценопопуляций Prunus armeniaca L. в зависимости от крутизны и экспозиции склонов. Наибольшую плотность абрикосовые массивы имеют на пологих склонах северных экспозиций и на участках, примыкающих к речным долинам. На южных склонах в связи с их эродированностью и крутизной по сравнению с северными склонами снижается как плотность деревьев абрикоса (r=-0.45), так и разнообразие других древесных видов (r=-0.91), что приводит к формированию монодоминантных абрикосовых редколесий. При увеличении плотности и совместном произрастании с другими древесными видами крона абрикоса приобретает пирамидальную форму, а при низкой плотности полушаровидную форму.
Electromagnetic Scattering by Networks of High-Permittivity Thin Wires
Creators: name: Forestiere, Carlo
name: Miano, Giovanni
name: Miranda, Bruno
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The electromagnetic scattering from interconnections of high-permittivity dielectric thin wires with sizes smaller than (or almost equal to) the operating wavelength is investigated. A simple lumped element model for the polarization current intensities induced in the wires is proposed. The circuit elements are capacitances and inductances between the wires. An analytical expression for the induced polarization currents in terms of the magneto-quasistatic current modes is obtained. The connection between the spectral properties of the loop inductance matrix and the network's resonances is established. The number of the allowed current modes and resonances is deduced from the topology of the circuit's digraph. The coupling to radiation is also included, and the radiative frequency shifts and the quality factors are derived. The introduced concept and methods may find applications both at the microwaves and in nanophotonics.
Single Electron Transport in electrically tunable nanomagnets
Creators: name: Fernandez-Rossier, J.
name: Aguado, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a single electron transistor (SET) based upon a II-VI semiconductor quantum dot doped with a single Mn ion. We present evidence that this system behaves like a quantum nanomagnet whose total spin and magnetic anisotropy depend dramatically both on the number of carriers and their orbital nature. Thereby, the magnetic properties of the nanomagnet can be controlled electrically. Conversely, the electrical properties of this SET depend on the quantum state of the Mn spin, giving rise to spin-dependent charging energies and hysteresis in the Coulomb blockade oscillations of the linear conductance.
description: 4.3 pages, 3 figures. Revised version. Accepted for publication in Phys. Rev. Lett
Electrical control of optical orientation of neutral and negatively charged excitons in n-type semiconductor quantum well
Creators: name: Dzhioev, R. I.
name: Korenev, V. L.
name: Lazarev, M. V.
name: Sapega, V. F.
name: Gammon, D.
name: Bracker, A. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report a giant electric field induced increase of spin orientation of excitons in n-type GaAs/AlGaAs quantum well. It correlates strongly with the formation of negatively charged excitons (trions) in the photoluminescence spectra. Under resonant excitation of neutral heavy-hole excitons, the polarization of excitons and trions increases dramatically with electrical injection of electrons within the narrow exciton-trion bias transition in the PL spectra, implying a polarization sensitivity of 200 % per Volt. This effect results from a very efficient trapping of neutral excitons by the quantum well interfacial fluctuations (so-called "natural" quantum dots) containing resident electrons.
description: 18 pages, 4 figures
Διερεύνηση της εικόνας εαυτού σε χρήστες και χρήστριες παράνομων ναρκωτικών ουσιών
Creators: name: Πουλοπούλου, Σταματίνα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Εαυτός
Παρουσίαση εαυτού
Ταυτότητα
Χρήστες ναρκωτικών
Στίγμα
Ποιοτική μεθοδολογία
Θεματική ανάλυση
Self
Self-presentation
Identity
Drug users
Stigma
Qualitative research
Thematic analysis

description: Παρόλο που οι πρόσφατες μελέτες εστιάζουν στη μελέτη του εαυτού στο πλαίσιο της στιγματισμένης ταυτότητας, η παρούσα έρευνα σχεδιάστηκε για να προσεγγίσει τον εαυτό και την παρουσίασή του σε ένα ευρύτερο πλαίσιο. Δόθηκε έμφαση στις διαπροσωπικές σχέσεις, τους κοινωνικούς ρόλους και τα συναισθήματα των συμμετεχόντων. Πραγματοποιήθηκαν 14 ημι-δομένες συνεντεύξεις σε ενήλικες χρήστες παράνομων ναρκωτικών ουσιών ηλικίας 27 – 65 ετών που επισκέπτονταν τις δύο μονάδες άμεσης πρόσβασης του ΚΕΘΕΑ στην Αθήνα για την κάλυψη των βασικών τους αναγκών. Ακολουθήθηκε στρατηγική θεματικής ανάλυσης από την οποία αναδύθηκαν τρία κύρια θέματα : «Ο Ξεχωριστός Εαυτός», «Ο Δυσλειτουργικός Εαυτός» και «Ο Ιδεατός Εαυτός». Το πρώτο θέμα αναφέρεται στα θετικά χαρακτηριστικά των συμμετεχόντων και τοποθετείται κυρίως στο παρελθόν. Το δεύτερο θέμα αφορά τις δυσμενείς συνθήκες που βιώνουν ως αποτέλεσμα της χρήσης στο παρόν. Το τρίτο και τελευταίο θέμα αφορά τα χαρακτηριστικά που επιθυμούν να αποκτήσουν μελλοντικά. Τα τρία θέματα φαίνεται να αναπτύσσονται παράλληλα με την πορεία της χρήσης. Κατά την ανάλυση, η στιγματισμένη ταυτότητα φάνηκε να έχει κυρίαρχο ρόλο στην παρουσίαση του εαυτού. Τα ευρήματα βοηθούν στην κατανόηση των αντιλήψεων των παράνομων χρηστών ναρκωτικών, των διαπροσωπικών τους σχέσεων, των συναισθημάτων τους και των επιθυμιών τους.
description: Although the most recent studies of self focus on self in the context of stigmatized identity, this research was designed to approach self and self- presentation in a wider context. Emphasis was placed on participants’ interpersonal relationships, social roles and feelings. Semi-structured interviews were conducted with 21 adults illegal drug users aged 27 - 65 who visit the two harm reduction services located in Athens. The thematic analysis revealed three main themes: “The Special Self”, “The Dysfunctional Self” and the “Ideal Self”. The first theme refers to the positive characteristics of the individual and it is mainly placed in the past. The second theme concerns adverse conditions experienced as a result of illicit drug use in the present. The third theme concerns the characteristics that illegal drug users wish to acquire in the future. All three issues appear to develop alongside drug use activities. During the analysis, the stigmatized identity appeared to have a dominant role in the presentation of the self. The findings help to understand illicit drug users’ perceptions, their interpersonal relationships, their feelings and their desires.
description: Σε συνεργασία με τη Νομική Σχολή Πανεπιστημίου Λευκωσίας (Κύπρος)
Facility Location Problem: The case of Sumezu clothing company
Creators: name: Πιστάρι, Ανίτα Βασίλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Χωροθέτηση εγκαταστάσεων
AHP μάθοδος
Πολυκριτήρια ανάλυση
Facility Location
AHP method
Multicriteria Analysis

description: The purpose of this thesis is to apply the Facility Location method for an existing clothing enterprise in order to select the most suitable location for opening a retail store. Among the models of this method, the Analytic Hierarchy Process (AHP) was implemented, which is an optimal solution for multicriteria analysis by allowing a simultaneous comparison of two criteria, as well as the Factor Rating method which is popular for its simplicity of application. In addition, the online tool AHP Online System (Geopel, 2018), which verified the results of our analysis, was used. Finally, a sensitivity analysis was carried out in order to certify the final selection of the location.
description: Αντικείμενο της παρούσας διπλωματική εργασίας είναι η εφαρμογή της μεθόδου Facility Location για υφιστάμενη εταιρεία παραγωγής ρουχισμού, για την επιλογή της καταλληλότερης τοποθεσίας για το άνοιγμα καταστήματος λιανικής πώλησης. Μεταξύ των μοντέλων της συγκεκριμένης μεθόδου, εφαρμόστηκε η Analytic Hierarchy Process (AHP), η οποία αποτελεί βέλτιστη λύση σε περιπτώσεις πολυκριτήριας ανάλυσης καθώς παρέχουν την δυνατότητα ταυτόχρονης σύγκρισης δύο κριτηρίων για την εξαγωγή συμπερασμάτων, καθώς και η μέθοδος Factor Rating η οποία είναι δημοφιλής και την απλότητα της εφαρμογής της. Επιπρόσθετα, έγινε χρήση του διαδικτυακού εργαλείου AHP Online System (Geopel, 2018), το οποίο επαλήθευσε τα αποτελέσματα της ανάλυσής μας. Τέλος, πραγματοποιήθηκε ανάλυση ευαισθησίας προκειμένου να πιστοποιηθεί η τελική επιλογή της τοποθεσίας.
'He would not meddle against Newark…' Cromwell’s strategic vision 1643-1644
Creators: name: Bennett, Martyn
Publisher: name: British Journal for Military History
Year: 2019

description: Cromwell with some justification is identified with East Anglia and this is often true of his early military career. However, his earliest campaigns were often focused on the area west of the Eastern Association counties and in particular they centred on the royalist garrison at Newark. This heavily defended town dominated several important communications arteries which Cromwell saw capturing the town as crucial to winning the war, at least in the region. Cromwell’s ruthless pursuit of his goal led him to criticize and even attack his superiors who did not see things his way. This article explores Cromwell’s developing strategic sense in the initial two years of the first civil war.
description: British Journal for Military History, Vol 5 No 1 (2019)
Three loop MSbar transversity operator anomalous dimensions for fixed moment n <= 8
Creators: name: Gracey, J. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the anomalous dimensions of the transversity operator at three loops in the MSbar scheme for fixed moment n where n <= 8. The results for the RI' renormalization scheme are also provided for an arbitrary linear covariant gauge for n <= 7.
description: 8 latex pages
Probing the ultrafast gain and refractive index dynamics of a VECSEL
Creators: name: Kriso, Christian
name: Bergmeier, Tim
name: Giannini, Nathan
name: Albrecht, Alexander
name: Sheik-Bahae, Mansoor
name: Benis, Sepehr
name: Faryadras, Sanaz
name: Van Stryland, Eric
name: Hagan, David
name: Koch, Martin
name: Mette, Gerson
name: Rahimi-Iman, Arash
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Typically, strong gain saturation and gain dynamics play a crucial role in semiconductor laser mode-locking. While there have been several investigations of the ultrafast gain dynamics in vertical-external-cavity surface-emitting lasers (VECSELs), little is known about the associated refractive index changes. Yet, such refractive index changes do not only have a profound impact on the pulse formation process leading to self-phase modulation, which needs to be compensated by dispersion, but they are also of particular relevance for assessing the feasibility of Kerr-lens mode-locking of VECSELs. Here, we measure both refractive index as well as gain dynamics of a VECSEL chip using the ultrafast beam deflection method. We find that, in contrast to the gain dynamics, the refractive index dynamics is dominated by an instantaneous ($\sim$100~fs) and a very slow component ($\sim$100~ps). The time-resolved measurement of nonlinear refraction allows us to predict a pulse-length dependent, effective nonlinear refractive index $n_{2,eff}$, which is shown to be negative and in the order of $10^{-16}$ $m^2/W$ for short pulse lengths ($\sim$100~fs) . It becomes positive for large excitation fluences and large pulse lengths (few ps). These results agree with some previous reports of self-mode-locked VECSELs for which the cavity design and pulse properties determine sign and strength of the nonlinear refractive index when assuming Kerr-lens mode-locking.
The cost of the car to the city of Vancouver
Creators: name: Dehnel, Patricia Lynne
Publisher: name: University of British Columbia
Year: 2008

description: This thesis was undertaken to identify and determine the costs borne by the municipal level of government to provide and maintain the infrastructure required by the private automobile. Such government expenses are known as subsidies. In 1992, Transport 2021 commissioned a broad study to determine the complete cost of transporting people by all modes of transportation throughout the Lower Mainland. This thesis complements the study by investigating the costs shouldered by one level of government, in one municipality and for one mode of transportation in greater detail. This thesis sets a framework that can be followed by other municipalities aimed at determining their own spending on the private automobile. The underlying assumption of this thesis is that the automobile is perceived as a user pay mode of transportation and, unlike public transit, is not subsidized. Subsidies to the automobile by all levels of government go unnoticed. This thesis demonstrates that cars actually benefit from subsidies. A framework for examining costs of the automobile was developed through a review of existing literature on automobile costs. Both direct costs and hidden costs are discussed. Most of the direct cost dollar figures were derived by examining the 1992 Vancouver City Budget and isolating those funds devoted to car infrastructure and services. The land cost of car infrastructure was determined by estimating its total land area and calculating the usual 1992 tax revenue of a similar sized parcel of land. The hidden costs of the car are discussed but not translated into dollar values. This thesis discovers that, in 1992, the automobile cost the City of Vancouver $185.6 million dollars in both direct expenditures and lost tax revenue. The discussion on hidden costs asserts that the true annual subsidy to the car by Vancouver is even higher. This thesis concludes with recommendations for mitigating city spending on the car. Elimination of free on-street parking is recommended as an equity fair method of cost mitigation that obliges car owners to be responsible for providing, or at least paying for, their own residential and work place parking facilities. This thesis recommends the introduction of an on-street permit parking system. Other user pay systems such as road tolls are discussed but not recommended at the municipal level alone.
Elementary fuzzy matrix theory and fuzzy models for social scientists
Creators: name: Kandasamy, W. B. Vasantha
name: Smarandache, Florentin
name: Ilanthenral, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 04A72; 03Exx

description: This book gives the basic notions of fuzzy matrix theory and its applications to simple fuzzy models. The approach is non-traditional in order to attract many students to use this methodology in their research. The traditional approach of mathematicians has conditioned students of sociology in such a manner that they are averse to using mathematical tools. Six simple types of fuzzy models that make use of fuzzy matrices are given. These models are distinct because they are time-dependent and can even be used for statistical data. The Fuzzy Cognitive Maps models gives the hidden pattern. Fuzzy Relational Maps model not only gives the hidden pattern but also gives the inter-relations between two sets of disjoint attributes. The Bidirectional Associative Memories model analyzes data depending on the time-period, while the Fuzzy Associative Memories model can give the gradation of importance of each attribute. Finally, the Fuzzy Relational Equation model is capable of giving a solution closer to the predicted solution. All the models are illustrated through elaborate examples of particular social problems.
description: 352 pages, 82 graphs, and 77 figures
‘All Pretty Well Fed Up and Worn Out’? Morale, Combat Motivation, and the ‘Marshall Effect’ in VIII Corps at Gallipoli
Creators: name: Sheffield, Gary
Publisher: name: British Journal for Military History
Year: 2019

description: This article explores the morale of the troops of British VIII Corps on Gallipoli in 1915-16, using Anthony King’s recent work on combat motivation in infantry platoons as a tool of analysis. King, partially rehabilitating the controversial work of S.L.A. Marshall, argues that left to themselves, the citizen armies of the early twentieth century tended to passivity. Officers resorted to a range of strategies to overcome this ‘Marshall Effect’, including appeals to patriotism and masculinity, mass tactics, and heroic leadership. It is contended that King’s model works well when applied to this case study – such methods were indeed employed by officers of VIII Corps - but the jury is out on its wider applicability, pending detailed case studies of other campaigns. As this article demonstrates, the morale of the troops of VIII Corps was severely tested throughout the Gallipoli campaign, as a rash of short-lived ‘panics’ demonstrated. There was a distinct downturn in August 1915, which was marked by an increase in rates of sickness and self-inflicted wounds, and a ‘strike’, when a sub-unit simply refused to carry out an attack. Despite this, there was no general and permanent breakdown of morale, in the sense of unwillingness to obey the orders of higher command. VIII Corps’ morale was characterised by stoicism and resilience in the face of adverse conditions.
description: British Journal for Military History, Vol 5 No 1 (2019)
Hemiptera Linnaeus 1758
Creators: name: Campodonico, Juan F.
name: Fierro, Andrés
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera

description: Hemiptera Linnaeus, 1758  Fulgoromorpha Evans, 1946
description: Published as part of Campodonico, Juan F. & Fierro, Andrés, 2019, Pseudoamycle polylepisae gen. et sp. nov., a fulgorid from the highlands of Northern Chile (Hemiptera: Fulgoridae), pp. 589-597 in Zootaxa 4544 (4) on page 590, DOI: 10.11646/zootaxa.4544.4.9, http://zenodo.org/record/2618581
Comparative high-resolution spectroscopy of M dwarfs -- exploring non-LTE effects
Creators: name: Olander, T.
name: Heiter, U.
name: Kochukhov, O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: M dwarfs are key targets for high-resolution spectroscopic analyses due to a high incidence of these stars in the solar neighbourhood and their importance as exoplanetary hosts. Several methodological challenges make such analyses difficult, leading to significant discrepancies in the published results. We compare M dwarf parameters derived by recent high-resolution near-infrared studies with each other and with fundamental stellar parameters. We also assess to what extent deviations from local thermodynamic equilibrium (LTE) for Fe and K influence the outcome of these studies. We carry out line formation calculations based on a modern model atmosphere grid along with a synthetic spectrum synthesis code that treats formation of atomic and molecular lines in cool-star atmospheres including departures from LTE. We use near-infrared spectra collected with the CRIRES instrument at the ESO VLT as reference observational data. We find that the effective temperatures obtained by the different studies mostly agree to better than 100 K. We see a much worse agreement in the surface gravities and metallicities. We demonstrate that non-LTE effects are negligible for Fe I in M-dwarf atmospheres but are important for K I. These effects, leading to K abundance and metallicity corrections on the order of 0.2 dex, may be responsible for some of the discrepancies in the published analyses. Differences in the temperature-pressure structures of the atmospheric models may be another factor contributing to the discrepancies, in particular at low metallicities and high effective temperatures. In high-resolution spectroscopic studies of M dwarfs attention should be given to details of the line formation physics as well as input atomic and molecular data. Collecting high-quality, wide wavelength coverage spectra of benchmark M dwarfs is an essential future step.
description: 20 pages, 11 figures. Accepted in A&A
title: Βελτιστοποίηση διαχείρισης ηλεκτρικής ενέργειας σε κτήρια με τεχνικές μηχανικής μάθησης
title: Optimization of electric energy management in buildings based on machine learning techniques
Creators: name: Αποστολακης Δημητριος
Publisher: name: Technical University of Crete
Year: 2021

description: Οι διαρκώς αυξανόμενες ενεργειακές ανάγκες των οικιακών καταναλωτών προκαλούν αύξηση του κόστους ηλεκτρικής ενέργειας και επιπτώσεις στο περιβάλλον. Η εργασία αυτή αφορά την υλοποίηση αλγορίθμων μηχανικής μάθησης, με στόχο τη βέλτιστη διαχείριση της κατανάλωσης ηλεκτρικής ενέργειας σε συστήματα οικιακών καταναλωτών σε κτήρια. Το σύστημα που εξετάζεται περιλαμβάνει ένα φωτοβολταϊκό σύστημα παραγωγής ηλεκτρικής ενέργειας, μία διάταξη αποθήκευσης ενέργειας σε μπαταρίες και το ηλεκτρικό δίκτυο με οποίο είναι διασυνδεδεμένα. Αναπτύχθηκε αλγόριθμος βελτιστοποίησης για τον υπολογισμό της βέλτιστης χρονοσειράς ηλεκτρικής ενέργειας που ανταλλάσσεται με το ηλεκτρικό δίκτυο έτσι ώστε να ελαχιστοποιείται το κόστος της ηλεκτρικής ενέργειας του οικιακού καταναλωτή. Παράλληλα, γίνεται επιπλέον μείωση του κόστος ηλεκτρικής ενέργειας με εφαρμογή αλγορίθμου χρονοπρογραμματισμού των ωρών λειτουργίας των επιμέρους ηλεκτρικών φορτίων του καταναλωτή. Ο βασικός αλγόριθμος μηχανικής μάθησης που ενσωματώνεται στη διαδικασία βελτιστοποίησης είναι ο Q-Learning, ενώ υλοποιούνται ακόμα δύο διαφορετικές εκδοχές του, ο αλγόριθμος Sarsa και ο Double-Q-Learning, με στόχο τη σύγκριση της απόδοσής τους στο πρόβλημα βελτιστοποίησης που εξετάζεται. Τα αποτελέσματα έδειξαν ότι με τον αλγόριθμο διαχείρισης ενέργειας που αναπτύχθηκε μπορεί να επιτευχθεί σημαντική μείωση του συνολικού κόστους ηλεκτρικής ενέργειας του καταναλωτή.
description: The continuously increasing energy demands of household consumers are causing higher electricity costs and environmental impact as well. This work concerns the implementation of machine learning algorithms, aiming at the management of electricity consumption in buildings. The system under consideration includes a photovoltaic system for generating electricity, a battery storage system and the electrical grid with which they are interconnected. An optimization algorithm has been developed to calculate the optimal time series of electricity exchanged with the grid to minimize the cost of electricity for the household consumer. At the same time, the cost of electricity is further reduced by applying an algorithm for scheduling the operating hours of individual electrical loads. The basic machine learning algorithm that is integrated in the optimization process is Q-Learning, while two more different versions are implemented, which are the Sarsa and the Double-Q-Learning algorithms, in order to compare their performance in the optimization problem. The results show that the energy management algorithm can reduce significantly the total electricity cost for the consumer.
Multicomponent radiatively driven stellar winds IV. On the helium decoupling in the wind of sigma Ori E
Creators: name: Krticka, Jiri
name: Kubat, Jiri
name: Groote, Detlef
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the possibility of the helium decoupling in the stellar wind of sigma Ori E. To obtain reliable wind parameters for this star we first calculate an NLTE wind model and derive wind mass-loss rate and terminal velocity. Using corresponding force multipliers we study the possibility of helium decoupling. We find that helium decoupling is not possible for realistic values of helium charge (calculated from NLTE wind models). Helium decoupling seems only possible for a very low helium charge. The reason for this behaviour is the strong coupling between helium and hydrogen. We also find that frictional heating becomes important in the outer parts of the wind of sigma Ori E due to the collisions between some heavier elements and the passive components -- hydrogen and helium. For a metallicity ten times lower than the solar one both hydrogen and helium decouple from the metals and may fall back onto the stellar surface. However, this does not explain the observed chemical peculiarity since both these components decouple together from the absorbing ions. Although we do not include the effects of the magnetic field into our models, we argue that the presence of a magnetic field will likely not significantly modify the derived results because in such case model equations describe the motion parallel to the magnetic field.
description: 11 pages; accepted for publication in A&A
On Some Quasi-Variational Inequalities and Other Problems with Moving Sets
Creators: name: Menaldi, José-Luis
name: Rautenberg, Carlos N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J86, 35J60, 35R35, 65K10, 93E20

description: Since its introduction over 50 years ago, the concept of Mosco convergence has permeated through diverse areas of mathematics and applied sciences. These include applied analysis, the theory of partial differential equations, numerical analysis, and infinite dimensional constrained optimization, among others. In this paper we explore some of the consequences of Mosco convergence on applied problems that involve moving sets, with some historical accounts, and modern trends and features. In particular, we focus on connections with density of convex intersections, finite element approximations, quasi-variational inequalities, and impulse problems.
When a 1981 Diary Meets Twitter: Reclaiming a teenage girl’s ordinary experience of the Northern Irish Troubles
Creators: name: Murphy, Oonagh
name: Aguiar, Laura
Publisher: name: British Journal for Military History
Year: 2019

description: The Northern Irish Troubles (1969-1998) have been the focus of many cross-disciplinary literature and official and unofficial storytelling projects. When reviewing the accounts produced by these studies and initiatives it is visible that less focus has been paid to the everyday experiences of the Troubles, particularly to a young girl’s perspective of them.
description: British Journal for Military History, Vol 5 No 1 (2019)