cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
News from z~6-10 galaxy candidates found behind gravitational lensing clusters
Creators: name: Schaerer, D.
name: Pello, R.
name: Egami, E.
name: Hempel, A.
name: Richard, J.
name: Borgne, J. -F. Le
name: Kneib, J. -P.
name: Wise, M.
name: Boone, F.
name: Combes, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We summarise the current status of our project to identify and study z~6-10 galaxies thanks to strong gravitational lensing. Building on the detailed work from Richard et al. (2006), we present results from new follow-up observations (imaging) undertaken with ACS/HST and the Spitzer Space Telescope and compare our results with findings from the Hubble Ultra-Deep Field (UDF). These new observations are in agreement with the high-z nature for the vast majority of the candidates presented in Richard et al. (2006). We also discuss the properties of other optical dropout sources found in our searches and related objects (EROs, sub-mm galaxies,...) from other surveys.
description: 6 pages, figs included. To appear in "At the Edge of the Universe: latest results from the deepest astronomical surveys", Eds. Jose Afonso, Henry Ferguson and Ray Norris, ASP Conf. Series, in press
Thickening of T1 Precipitates during Aging of a High Purity Al−4Cu−1Li−0.25Mn Alloy
Creators: name: Häusler, Ines
name: Kamachali, Reza Darvishi
name: Hetaba, Walid
name: Skrotzki, Birgit
Publisher: name: Technische Universität Berlin
Year: 2018
Subjects: subject: 500 Naturwissenschaften und Mathematik
subject: Al-Cu-Li-alloy
subject: precipitation
subject: T1 precipitate
subject: microstructure evolution
subject: thickening
subject: creep
subject: volume fraction
subject: number density
subject: strain difference

description: The age hardening response of a high-purity Al–4Cu–1Li–0.25Mn alloy (wt. %) during isothermal aging without and with an applied external load was investigated. Plate shaped nanometer size T1 (Al2CuLi) and θ′ (Al2Cu) hardening phases were formed. The precipitates were analyzed with respect to the development of their structure, size, number density, volume fraction and associated transformation strains by conducting transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) studies in combination with geometrical phase analysis (GPA). Special attention was paid to the thickening of T1 phase. Two elementary types of single-layer T1 precipitate, one with a Li-rich (Type 1) and another with an Al-rich (Defect Type 1) central layer, were identified. The results show that the Defect Type 1 structure can act as a precursor for the Type 1 structure. The thickening of T1 precipitates occurs by alternative stacking of these two elementary structures. The thickening mechanism was analyzed based on the magnitude of strain associated with the precipitation transformation normal to its habit plane. Long-term aging and aging under load resulted in thicker and structurally defected T1 precipitates. Several types of defected precipitates were characterized and discussed. For θ′ precipitates, a ledge mechanism of thickening was observed. Compared to the normal aging, an external load applied to the peak aged state leads to small variations in the average sizes and volume fractions of the precipitates.
Signature of Electronic Correlations in the Optical Conductivity of the Doped Semiconductor Si:P
Creators: name: Hering, Marco
name: Scheffler, Marc
name: Dressel, Martin
name: Lohneysen, Hilbert v.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Electronic transport in highly doped but still insulating silicon at low temperatures is dominated by hopping between localized states; it serves as a model system of a disordered solid for which the electronic interaction can be investigated. We have studied the frequency-dependent conductivity of phosphorus-doped silicon in the THz frequency range (30 GHz to 3 THz) at low temperatures $T\geq 1.8$ K. The crossover in the optical conductivity from a linear to a quadratic frequency dependence as predicted by Efros and Shklovskii is observed qualitatively; however, the simple model does not lead to a quantitative agreement. Covering a large range of donor concentration, our temperature- and frequency-dependent investigations reveal that electronic correlation effects between the localized states play an important and complex role at low temperatures. In particular we find a super-linear frequency dependence of the conductivity that highlights the influence of the density of states, i.e. the Coulomb gap, on the optical conductivity. When approaching the metal-to-insulator transition by increasing doping concentration, the dielectric constant and the localization length exhibit critical behavior.
description: 9 pages, 8 figures, 1 table
Stranger Times. Heterotemporality and the Spiritual Experience of Illness
Creators: name: Pannofino, Nicola
Publisher: name: Italian Sociological Review
Year: 2024

description: As highlighted in the medical humanities and narrative medicine the onset of a severe pathology constitutes a biographical disruption that on the one hand alters the patient’s temporal perspective throughout the therapeutic process, and on the other can trigger existential and spiritual questions and needs. The direct connection between temporality and spirituality in the subjective experience of illness is, however, little investigated in the sociological literature.

Based on the analysis of personal illness narratives collected through qualitative interviews using the creative technique of time-box with cancer patients in Piedmont, this article shows how the relation with the disease is inscribed as an “other” time or “heterotemporality” in the patient’s life course, producing estranging effects on identity and agentivity from which emerges a spirituality focused on time as a resource for coping with suffering. These results can provide indications for implementing spiritual care strategies in healthcare and clinical contexts.
description: Italian Sociological Review, Vol. 14 No. 3 (2024)
Εργαλεία μάρκετινγκ των μέσων κοινωνικής δικτύωσης: η περίπτωση των Εκδοτικών Οίκων
Creators: name: Γαβρέλα, Ειρήνη Γαβριήλ Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κοινωνικά Μέσα
Εκδοτικοί Οίκοι
Καταναλωτική Συμπεριφορά
Social Media
Publishing Companies
Consumer Behavior

description: Στα πλαίσια της παρούσας διπλωματικής εργασίας, παρουσιάζεται η πλέον δημοφιλής μέθοδος μάρκετινγκ, το Μάρκετινγκ των Κοινωνικών Μέσων, τα εργαλεία που παρέχει στις επιχειρήσεις αλλά και η επιρροή που έχει στην καταναλωτική συμπεριφορά των χρηστών του Διαδικτύου. Η εργασία επιχείρησε, μέσω της βιβλιογραφικής ανασκόπησης και της έρευνας βασισμένης σε ερωτηματολόγια, να αποτυπώσει τη στροφή των επιχειρήσεων προς τα Κοινωνικά Μέσα, για την όσο το δυνατόν ευρύτερη προώθηση των προϊόντων ή των υπηρεσιών τους. Πριν την έρευνα, γίνεται αποσαφήνιση σημαντικών εννοιών που σχετίζονται με το Web 2.0, το μάρκετινγκ και το μάνατζμεντ και ειδικότερα με το μάρκετινγκ των Κοινωνικών Μέσων. Στη συνέχεια, αναλύεται διεξοδικά η περίπτωση των Εκδοτικών Οίκων. Πιο συγκεκριμένα, η στρατηγική που ακολουθεί ο ελληνικός Εκδοτικός Οίκος Ψυχογιός και ο διεθνής Εκδοτικός Οίκος Penguin Random House για την προώθηση των προϊόντων τους. Στο τελευταίο σκέλος της εργασίας, συγκεκριμενοποιείται η μελέτη της χρήσης εργαλείων μάρκετινγκ από τους Εκδοτικούς Οίκους και η επίδρασή τους στις αποφάσεις των καταναλωτών. Αναλύονται τα αποτελέσματα της έρευνας, καταλήγοντας σε συμπεράσματα για την εφαρμογή των εργαλείων Κοινωνικών Μέσων Δικτύωσης από τις επιχειρήσεις, στον Ελλαδικό χώρο.
description: Within the boundaries of this thesis, it has been attempted to present the most popular marketing method, that of Social Media Marketing, the tools that are being used by the brands, and the effect to consumer’s behavior. This thesis tried, using both literature review and a quantitative research based on questionnaires, to note down the picture regarding the tendency towards using social media by companies in order for them to promote their products or services. Prior to the analysis of the methods used, a complete explanation of meaningful terms relating to Web 2.0, marketing in general, with specific reference to Social Media Marketing is provided. Extensive analysis of the Publishing Sector Case Study continues this study, examining the marketing strategy of a Greek Publishing Company, “Psichogios Publications” and of an International Publishing Company, “Penguin Random House”, in order to promote their products. The culmination of the thesis is a specialized study of SMM in Greek Publishing Companies and their effects on consumer’s decision making. The investigation was carried out for the purposes of completing this thesis, concluding in findings for application of Social Media Marketing tools in Greece, having analyzed the results of the collected data.
Interpreting the Kustaanheimo-Stiefel transform in gravitational dynamics
Creators: name: Saha, Prasenjit
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Kustaanheimo-Stiefel transform turns a gravitational two-body problem into a harmonic oscillator, by going to four dimensions. In addition to the mathematical-physics interest, the KS transform has proved very useful in N-body simulations, where it helps handle close encounters. Yet the formalism remains somewhat arcane, with the role of the extra dimension being especially mysterious. This paper shows how the basic transformation can be interpreted as a rotation in three dimensions. For example, if we slew a telescope from zenith to a chosen star in one rotation, we can think of the rotation axis and angle as the KS transform of the star. The non-uniqueness of the rotation axis encodes the extra dimension. This geometrical interpretation becomes evident on writing KS transforms in quaternion form, which also helps derive concise expressions for regularized equations of motion.
description: To appear in MNRAS
Reassessing Hydrological Processes That Control Stable Isotope Tracers in Groundwater of the Atacama Desert (Northern Chile)
Creators: name: Scheihing, Konstantin W.
name: Moya, Claudio E.
name: Struck, Ulrich
name: Lictevout, Elisabeth
name: Tröger, Uwe
Publisher: name: Technische Universität Berlin
Year: 2017
Subjects: subject: 550 Geowissenschaften
subject: isotope fractionation
subject: Andes
subject: arid region
subject: vapor mixing
subject: recharge mechanisms
subject: alluvial fan
subject: oxygen-18
subject: Altiplano
subject: Pampa del Tamarugal
subject: tritium

description: A collection of 514 stable isotope water samples from the Atacama Desert is being reassessed geostatistically. The evaluation reveals that adjacent Andean catchments can exhibit distinct δ18O and δ2H value ranges in meteoric waters, despite similar sample altitudes of up to 4000 m above sea level (a.s.l.). It is proposed that the individual topographic features of each catchment at the western Andean Precordillera either inhibit or facilitate vapor mixing processes of easterly and westerly air masses with different isotopic compositions. This process likely causes catchment-specific isotope value ranges in precipitations (between −7‰ and −19‰ δ18O) that are being consistently reflected in the isotope values of groundwater and surface waters of these catchments. Further, due to evaporation-driven isotopic fractionation and subsurface water mixing, isotope samples of the regional Pampa del Tamarugal Aquifer plot collectively parallel to the local meteoric water line. Besides, there is no evidence for hydrothermal isotopic water-rock interactions. Overall, the observed catchment-dependent isotope characteristics allow for using δ18O and δ2H as tracers to delineate regionally distinct groundwater compartments and associated recharge areas. In this context, δ18O, δ2H and 3H data of shallow groundwater at three alluvial fans challenge the established idea of recharge from alluvial fans after flash floods.
Τα νεότερα δεδομένα για την τοπογραφία της αρχαίας Θεσσαλονίκης (1990 – 2009)
Creators: name: Sainti Chimpa, Sophia (Σαΐντη Χίμπα Σοφία), Μερουάν
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Αρχαία Θεσσαλονίκη-Τοπογραφία
Ancient Thessaloniki-Topography

description: Η παρούσα εργασία η οποία χρησιμοποίησε ως αφετηρία το έργο του Massimo Vitti (M.Vitti, Η πολεοδομική εξέλιξη της Θεσσαλονίκης από την ίδρυσή της έως τον Γαλέριο, Αθήνα, 1996) αποσκοπεί στο να συμπληρώσει την πολεοδομική εικόνα της ελληνιστικής και ρωμαϊκής Θεσσαλονίκης με τα νεότερα αρχαιολογικά δεδομένα από το 1990 έως το 2009. Παρουσιάζονται τα νεότερα αρχαιολογικά δεδομένα, από τα σημαντικότερα εκ των οποίων είναι ο ιωνικός ναός της οδού Καραολή και Δημητρίου, τα ευρήματα της Πλατείας Διοικητηρίου, καθώς και οι προγενέστερες οικιστικές φάσεις στα βαθύτερα στρώματα στην περιοχή ρωμαϊκής Αγοράς και στην Πλατεία Ναυαρίνου κάτω από το Γαλεριανό ανάκτορο και το Οκτάγωνο, ενώ εξετάζονται τα τοπογραφικά και πολεδομικά ζητήματα της αρχαίας πόλης. Στην εργασία παρατίθεται κατάλογος των νεότερων αρχαιολογικών δεδομένων και επισυνάτπονται δυο τοπογραφικά διαγράμματα με τις αρχαιολογικές θέσεις.
description: This study uses a previous study (M.Vitti, The Evolution of the City Plan of Thessaloniki from its Foundation to the Galerius period, Athens, 1996) of the evolution of ancient Thessaloniki’s city plan as a starting point. The aim of the study is to update the city plan with the latest archaeological data from 1990 to 2009. The most important examples of these updates include the Ionic temple at Karaoli and Dimitrioustreet, the antiquities of the Diikitiriou Square and the pre residential phases of the area covered by the Roman Agora and by the Galerius Palace at Navarino Square.The study includes a catalogue of the archaeological data and two maps of the Hellenistic and the Roman city respectively.
The XMM-Newton wide-field survey in the COSMOS field II: X-ray data and the logN-logS
Creators: name: Cappelluti, N.
name: Hasinger, G.
name: Brusa, M.
name: Comastri, A.
name: Zamorani, G.
name: Boehringer, H.
name: Brunner, H.
name: Civano, F.
name: Finoguenov, A.
name: Fiore, F.
name: Gilli, R.
name: Griffiths, R. E.
name: Mainieri, V.
name: Matute, I.
name: Miyaji, T.
name: Silverman, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the data analysis and the X-ray source counts for the first season of XMM-Newton observations in the COSMOS field. The survey covers ~2 deg^2 within the region of sky bounded by 9^h57.5^m
description: 12 Pages, 10 figures. Accepted for publication for the COSMOS APJS
Homes Becoming Religious Transnational Spaces: The Impact of COVID-19 Immobility on the Religious Activities of Migrant Muslim Women
Creators: name: Ince-Beqo, Gül
Publisher: name: Italian Sociological Review
Year: 2024

description: Since the outbreak of the COVID-19 emergency, the marked division between the home and public space has been increasingly emphasized, and the concept of ‘home’ has become more and more connoted with the values of security and control. The question that arises is this: how did the ‘stay-at-home’ period affect (and continues to affect) the home-based life of migrant Muslim women and their collective religious practices? Drawing upon the narratives of Turkish Muslim women living in Northern Italy, the research reported in this paper focused on their frequency of religious participation both during the pre-pandemic period and during the ‘stay-at-home’ one by identifying how they adapted to online meetings, courses, or collective prayers. If collective religious activity in mosques for these women, in addition to spiritual support, was a remarkable opportunity for them to interface with public space, allowing them to retreat from the everyday family commitments of their home, virtual participation in religious events organized by both the country of origin and the diasporas created a highly transnational dimension for them in that same home. Considering Italy’s peripheral diasporic position, particularly in terms of religious organizations, in the Turkish diaspora in Europe, this expanded, albeit virtual, participation of migrant women is significant because it seems to give them the opportunity to reinvent the meanings of place and the migratory experience, about both their peers in Turkey and to those living in the diasporas, and to develop awareness about identity issues.
description: Italian Sociological Review, Vol. 14 No. 3 (2024)
Test of the superdiffusion model in the interstellar medium around the Geminga pulsar
Creators: name: Wang, Sheng-Hao
name: Fang, Kun
name: Bi, Xiao-Jun
name: Yin, Peng-Fei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The TeV $γ$-ray halo around the Geminga pulsar is an important indicator of cosmic-ray (CR) propagation in the local zone of the Galaxy as it reveals the spatial distribution of the electrons and positrons escaping from the pulsar. Considering the intricate magnetic field in the interstellar medium (ISM), it is proposed that superdiffusion model could be more realistic to describe the CR propagation than the commonly used normal diffusion model. In this work, we test the superdiffusion model in the ISM around the Geminga pulsar by fitting to the surface brightness profile of the Geminga halo measured by HAWC. Our results show that the chi-square statistic monotonously increases as $α$ decreases from 2 to 1, where $α$ is the characteristic index of superdiffusion describing the degree of fractality of the ISM and $α=2$ corresponds to the normal diffusion model. We find that model with $α<1.32$ (or $<1.4$, depending on the data used in fit) is disfavored at 95\% confidence level. Superdiffusion model with $α$ close to 2 can well explain the morphology of the Geminga halo, while it predicts much higher positron flux on the Earth than the normal diffusion model. This has important implication for the interpretation of the CR positron excess.
description: 11 pages, 4 figures, 1 table
Ultrafast hot carrier relaxation in silicon monitored by phase-resolved transient absorption spectroscopy
Creators: name: Wörle, Martin
name: Holleitner, Alexander W.
name: Kienberger, Reinhard
name: Iglev, Hristo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The relaxation dynamics of hot carriers in silicon (100) is studied via a novel holistic approach based on phase-resolved transient absorption spectroscopy with few-cycle optical pulses. After excitation by a sub-5 fs light pulse, strong electron-phonon coupling leads to an ultrafast momentum relaxation with time constant of 10 fs. The thermalization of the hot carriers occurs on a time constant of 150 fs, visible in the temporal evolution of the collision time as extracted from the Drude model. We find an increase of the collision time from 3 fs for the shortest timescales with a saturation at approximately 18 fs. Moreover, the optical effective mass of the hot carrier ensemble evolves on ultrafast timescales as well, with a bi-exponential decrease from 0.7 $m_e$ to about 0.125 $m_e$ and time constants of 4 fs and 58 fs. The presented information on the electron mass dynamics as well as the momentum-, energy-, and collision-scattering times with unprecedented time resolution is important for all hot carrier optoelectronic devices.
description: 6 pages, 5 figures
Further analysis of the quantum critical point of Ce$_{1-x}$La$_{x}$Ru$_{2}$Si$_{2}$
Creators: name: Raymond, S.
name: Knafo, W.
name: Flouquet, J.
name: Lejay, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: New data on the spin dynamics and the magnetic order of Ce$_{1-x}$La$_{x}$Ru$_{2}$Si$_{2}$ are presented. The importance of the Kondo effect at the quantum critical point of this system is emphasized from the behaviour of the relaxation rate at high temperature and from the variation of the ordered moment with respect to the one of the Néel temperature for various $x$.
description: Contribution for the Festschrift on the occasion of Hilbert von Loehneysen 60 th birthday. To be published as a special issue in the Journal of Low Temperature Physics
Nonlinear motion of a vessel in a seaway
Creators: name: Howard, J. David
Publisher: name: University of British Columbia
Year: 2009

description: This work considers the nonlinear motion of a ship in waves. Common linear techniques have been examined to determine the possibility of extending them to predict nonlinear ship motion. Both physical and numerical modelling techniques were used to study the motion of ships in waves. These linear techniques were evaluated and compared against one another. The limitations of these methods were found, and a detailed discussion regarding their limitations given for both the estimation of the linear motion and the capabilities of being extended into the realms of nonlinear motion prediction. Most of the current techniques are incapable of predicting the nonlinear motion of a vessel in waves. More work is required to overcome the shortcomings for both physical and numerical modelling of the nonlinear motion of a vessels in waves.
Assessing the Oncolytic Capacity of Conditionally Replicating Adenovirus Armed with p14 Fusion Associated Small Transmembrane Protein and the Adenovirus Death Protein
Creators: name: Del Papa, Joshua
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2019
Subjects: Adenovirus
p14 FAST
Oncolytic Virus
Adenovirus Death Protein

description: Intratumoral injection of oncolytic viruses provides a direct means of tumor cell elimination for inoperable tumors. Unfortunately, oncolytic vectors based on human adenovirus (HAdV) typically do not spread efficiently throughout the tumor mass, reducing the efficacy of treatment. In this thesis, I explore the efficacy of conditionally replicating HAdV vectors expressing either the p14 Fusion Associated Small Transmembrane (FAST) protein (CRAdFAST) or p14 FAST protein in combination with the adenovirus death protein (CRAdFAST-ADP). The p14 FAST protein mediates cell-cell fusion, which may enhance spread of the virus-mediated, tumor cell-killing effect, while ADP aids in cell lysis and HAdV spread at late times in infection. I first explored the efficacy of CRAdFAST in the 4T1 immune competent mouse model of cancer. Treatment with CRAdFAST resulted in enhanced cell death compared to vector lacking the p14 FAST gene in vitro, but did not reduce the tumor growth rate in vivo. The 4T1 model was significantly resistant to HAdV infection and propagation, so I next explored CRAdFAST efficacy in human A549 cell culture and a xenograft mouse model of cancer. In the human A549 lung adenocarcinoma model of cancer, CRAdFAST showed significantly improved oncolytic efficacy in vitro and in vivo. In an A549 xenograft tumor model in vivo, CRAdFAST induced tumor cell fusion which led to the formation of large acellular regions within the tumor, and significantly reduced the tumor growth rate compared to control vector. Finally, to assess the use of a newly constructed CRAdFAST vector co-expressing the adenovirus death protein (ADP), a new model was explored comprised of CMT-64.6 mouse lung carcinoma cells which are syngeneic with Balb/C mice. This model was significantly more sensitive to HAdV infection and CRAdFAST induced fusion than the 4T1 cell line. In this model, expression of ADP and p14 FAST from a CRAdFAST-like vector (CRAdFAST-ADP) resulted in significant oncolytic synergy in vitro but not in vivo. My results indicate that expression of p14 FAST protein, and potentially ADP, from an oncolytic HAdV can improve vector efficacy for the treatment of cancer, but improved in vivo models will be required to analyze the full preclinical potential of these oncolytic HAdV vectors.
High precision meteor observations with the Canadian Automated Meteor Observatory -- Data reduction pipeline and application to meteoroid mechanical strength measurements
Creators: name: Vida, Denis
name: Brown, Peter G.
name: Campbell-Brown, Margaret
name: Weryk, Robert J.
name: Stober, Gunter
name: McCormack, John P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. The mirror tracking system of the Canadian Automated Meteor Observatory (CAMO) can track meteors in real time, providing an effective angular resolution of 1 arc second and a temporal resolution of 100 frames per second. Aims. We describe the upgraded hardware and give details of the data calibration and reduction pipeline. We investigate the influence of meteor morphology on radiant and velocity measurement precision, and use direct observations of meteoroid fragmentation to constrain their compressive strengths. Methods. On July 21, 2017, CAMO observed a ~4 second meteor on a JFC orbit. It had a shallow entry angle ~8 deg and 12 fragments were visible in the narrow-field video. The event was manually reduced and the exact moment of fragmentation was determined. The aerodynamic ram pressure at the moment of fragmentation was used as a proxy for compressive strength, and strengths of an additional 19 fragmenting meteoroids were measured in the same way. The uncertainty in the atmosphere mass density was estimated to be +/-25% using NAVGEM-HA data. Results. We find that meteor trajectory accuracy significantly depends on meteor morphology. The CAMO radiant and initial velocity precision for non-fragmenting meteors with short wakes is ~0.5' and 1 m/s, while that for meteors with fragments or long wakes is similar to non-tracking, moderate field of view optical systems (5', ~50 m/s). Measured compressive strengths of 20 fragmenting meteoroids (with less precise radiants due to their morphology) was in the range of 1-4 kPa, which is in excellent accord with Rosetta in-situ measurements of 67P. Fragmentation type and strength do not appear to be dependent on orbit. The mass index of the 12 fragments in the July 21 meteoroid was very high (s = 2.8), indicating possible progressive fragmentation.
description: Accepted for publication in Icarus
Quantum Chemical Analysis of the Excited State Dynamics of Hydrated Electrons
Creators: name: Scherer, P. O. J.
name: Fischer, Sighart F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Quantum calculations are performed for an anion water cluster representing the first hydration shell of the solvated electron in solution. The absorption spectra from the ground state, the instant excited states and the relaxed excited states are calculated including CI-SD interactions. Analytic expressions for the nonadiabatic relaxation are presented. It is shown that the 50fs dynamics recently observed after s->p excitation is best accounted for if it is identified with the internal conversion, preceded by an adiabatic relaxation within the excited p state. In addition, transient absorptions found in the infrared are qualitatively reproduced by these calculations .
การยับยั้งแบคทีเรียก่อโรคทางเดินอาหารด้วยสารสกัดสมุนไพรที่ใช้ในการทำลูกแป้งข้าวหมาก
Creators: name: อรุณ ชาญชัยเชาว์วิวัฒน์
name: สุชารัตน์ เกาะแก้ง
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2556
Subjects: ลูกแป้งข้าวหมาก,สมุนไพร,Shigella boydii,Staphylococcus aureus

description: 2, 6, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
On asymptotic behavior of anisotropic Dvali-Gabadadze-Porrati branes
Creators: name: Kobayashi, Tsutomu
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The braneworld model of Dvali-Gabadadze-Porrati (DGP) provides an interesting alternative to a positive cosmological constant by modifying gravity at large distances. We investigate the asymptotic behavior of homogeneous and anisotropic cosmologies on the DGP brane. It is shown that all Bianchi models except type IX isotropize, as in general relativity, if the so called $E_{μν}$ term satisfies some energy condition. Isotropization can proceed slower in DGP gravity than in general relativity.
description: 5 pages, 1 figure, accepted for publication in Class. Quantum Grav
การพัฒนาหุ่นยนต์สองล้อแบบสมดุลด้วยตัวเอง
Creators: name: ธัญญารัตน์ ปานกำเนิด
name: ลัดดาวรรณ ภาเจริญสุข
name: ณัฐธิดา ดาราเย็น
name: ณัฐดนัย สิงห์คลีวรรณ
name: ธีรวิทย์ อัศวศิลปะกุล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2556
Subjects: หุ่นยนต์สองล้อ,หุ่นยนต์สมดุลด้วยตัวเอง

description: 2, 6, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
SUSY Breaking Constraints on Modular flavor $S_3$ Invariant $SU(5)$ GUT Model
Creators: name: Du, Xiaokang
name: Wang, Fei
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Modular flavor symmetry can be used to explain the quark and lepton flavor structures. The SUSY partners of quarks and leptons, which share the same superpotential with the quarks and leptons, will also be constrained by the modular flavor structure and show a different flavor(mixing) pattern at the GUT scale. So, in realistic modular flavor models with SUSY completion, constraints from the collider and DM constraints can also be used to constrain the possible values of the modulus parameter. In the first part of this work, we discuss the possibility that the $S_3$ modular symmetry can be preserved by the fixed points of $T^2/Z_N$ orbifold, especially from $T^2/Z_2$. To illustrate the additional constraints from collider etc on modular flavor symmetry models, we take the simplest UV SUSY-completion $S_3$ modular invariance SU(5) GUT model as an example with generalized gravity mediation SUSY breaking mechanism. We find that such constraints can indeed be useful to rule out a large portion of the modulus parameters. Our numerical results show that the UV-completed model can account for both the SM (plus neutrino) flavor structure and the collider, DM constraints. Such discussions can also be applied straightforwardly to other modular flavor symmetry models, such as $A_4$ or $S_4$ models.
description: 16 pages,3 figures
Μελέτη και επίδοση μαθητών Ε και ΣΤ δημοτικού στο διαγωνισμό "Μαθηματικά της Φύσης και της Ζωής"
Creators: name: Σαββίδου, Σταυρούλα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Βιωματικά Μαθηματικά
Διερεύνηση Μαθηματικών
Ευφυΐα
Μελέτη επιδόσεων
Προπαίδεια
Ρεαλιστικά Μαθηματικά
Experiential Mathematics
Intelligence
Multiplication tables
Performance
Realistic Mathematics
Study Exploring Mathematics

description: Η παρούσα ερευνητική μελέτη θα διαπραγματευτεί το θέμα της σχολικής επίδοσης των μαθητών δημοτικού σχολείου στα Μαθηματικά της Φύσης και της Ζωής. Συγκεκριμένα, αφού πρώτα γίνει µια ξεχωριστή θεωρητική ανασκόπηση για τα χαρακτηριστικά της μάθησης, της σχολικής επίδοσης, τα προβλήματα μάθησης και τους παράγοντες που τα επηρεάζουν, στη συνέχεια θα γίνει προσπάθεια για σύγκριση και αλληλοσυσχέτιση όλων αυτών των παραγόντων. Απώτερος στόχος αυτής της διαδικασίας είναι να αναδειχθεί η σχέση των προβλημάτων μάθησης και της χαμηλής ή υψηλής σχολικής επίδοσης µε το ευρύτερο σχολικό πλαίσιο. Μέσα στα πλαίσια της προσέγγισης των προβλημάτων μάθησης, θα εξεταστεί και ο ρόλος των γονέων των μαθητών και συγκεκριμένα της συμμέτοχης τους στο σχολείο. Τέλος, θα παρουσιαστούν τα ευρήματα έρευνας που έγινε µε στόχο τη συγκριτική μελέτη του τρόπου που αξιολογούνται, μέσα στο σχολικό πλαίσιο, τα προβλήματα μάθησης και χαμηλής ή υψηλής σχολικής επίδοσης που παρουσιάζουν μαθητές κατόπιν διαγωνισμού που έγινε στα σχολεία της Κοζάνης.
description: This research study will negotiate the issue of school performance of Mathematics of Nature and of Life that show elementary school. Specifically, having first reached a distinct theoretical review on the characteristics of learning, school performance, learning problems and the factors that affect them, then we will attempt to compare and interrelation of all these factors. The ultimate goal of this process is to highlight the relationship between learning problems and low performance high school with the wider school context. Within the framework of the approach of learning problems, will be examined and the role of parents of pupils and in particular of their symmetochis at school. Finally, research findings will be presented that was aimed at the comparative study of the way they are evaluated, in the school context, learning problems and low or performance high school that Kozanis.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Νηπιαγωγών (Πανεπιστήμιο Δυτικής Μακεδονίας)
Electronic structure with direct diagonalization on a D-Wave quantum annealer
Creators: name: Teplukhin, Alexander
name: Kendrick, Brian K.
name: Tretiak, Sergei
name: Dub, Pavel A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum chemistry is regarded to be one of the first disciplines that will be revolutionized by quantum computing. Although universal quantum computers of practical scale may be years away, various approaches are currently being pursued to solve quantum chemistry problems on near-term gate-based quantum computers and quantum annealers by developing the appropriate algorithm and software base. This work implements the general Quantum Annealer Eigensolver (QAE) algorithm to solve the molecular electronic Hamiltonian eigenvalue-eigenvector problem on a D-Wave 2000Q quantum annealer. The approach is based on the matrix formulation, efficiently uses qubit resources based on a power-of-two encoding scheme and is hardware-dominant relying on only one classically optimized parameter. We demonstrate the use of D-Wave hardware for obtaining ground and electronically excited states across a variety of small molecular systems. This approach can be adapted for use by a vast majority of electronic structure methods currently implemented in conventional quantum-chemical packages. The results of this work will encourage further development of software such as qbsolv which has promising applications in emerging quantum information processing hardware and is able to address large and complex optimization problems intractable for classical computers.
The Iterated Projected Position Algorithm for Constructing Exponentially Localized Generalized Wannier Functions for Periodic and Non-Periodic Insulators in Two Dimensions and Higher
Creators: name: Stubbs, Kevin D.
name: Watson, Alexander B.
name: Lu, Jianfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Localized bases play an important role in understanding electronic structure. In periodic insulators, a natural choice of localized basis is given by the Wannier functions which depend a choice of unitary transform known as a gauge transformation. Over the past few decades, there have been many works which have focused on optimizing the choice of gauge so that the corresponding Wannier functions are maximally localized or reflect some symmetry of the underlying system. In this work, we consider fully non-periodic materials where the usual Wannier functions are not well defined and gauge optimization is impossible. To tackle the problem of calculating exponentially localized generalized Wannier functions in both periodic and non-periodic system we discuss the "Iterated Projected Position (IPP)" algorithm. The IPP algorithm is based on matrix diagonalization and therefore unlike optimization based approaches it does not require initialization and cannot get stuck at a local minimum. Furthermore, the IPP algorithm is guaranteed by a rigorous analysis to produce exponentially localized functions under certain mild assumptions. We numerically demonstrate that the IPP algorithm can be used to calculate exponentially localized bases for the Haldane model, the Kane-Mele model (in both $\mathbb{Z}_2$ invariant even and $\mathbb{Z}_2$ invariant odd phases), and the $p_x + i p_y$ model on a quasi-crystal lattice.
description: 19 pages, 26 figures
Latest results on Jovian disk X-rays from XMM-Newton
Creators: name: Branduardi-Raymont, G.
name: Bhardwaj, A.
name: Elsner, R. F.
name: Gladstone, G. R.
name: Ramsay, G.
name: Rodriguez, P.
name: Soria, R.
name: Waite, J. H.
name: Cravens, T. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a spectral study of the soft X-ray emission (0.2-2.5 keV) from low-latitude (`disk') regions of Jupiter. The data were obtained during two observing campaigns with XMM-Newton in April and November 2003. While the level of the emission remained approximately the same between April and the first half of the November observation, the second part of the latter shows an enhancement by about 40% in the 0.2-2.5 keV flux. A very similar, and apparently correlated increase, in time and scale, was observed in the solar X-ray and EUV flux. The months of October and November 2003 saw a period of particularly intense solar activity, which appears reflected in the behaviour of the soft X-rays from Jupiter's disk. The X-ray spectra, from the XMM-Newton EPIC CCD cameras, are all well fitted by a coronal model with temperatures in the range 0.4-0.5 keV, with additional line emission from Mg XI (1.35 keV) and Si XIII (1.86 keV): these are characteristic lines of solar X-ray spectra at maximum activity and during flares. The XMM-Newton observations lend further support to the theory that Jupiter's disk X-ray emission is controlled by the Sun, and may be produced in large part by scattering, elastic and fluorescent, of solar X-rays in the upper atmosphere of the planet.
description: 17 pages, 7 figures, accepted for publication in a special issue of Planetary and Space Science
Supplementary document for Internal motion within ultrafast asynchronous dual wavelength mode-locked laser - 6774690.pdf
Creators: name: Liu, Haiyan
name: Xu, Lufeng
name: Zhang, ZeXin
name: Song, Yangrong
name: Tian, Jinrong
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Repeated measurements show that the formation dynamics of the ground-state soliton molecule can be considerably different.
Understanding the dynamics of stakeholder participation in evaluation research : A document study
Creators: name: Alex, Jacqueline Patricia Smit
Publisher: name: University of British Columbia
Year: 2009

description: Stakeholder participation in evaluation has become increasingly acceptable in evaluation practice as researchers strive to produce relevant and useful studies. However, evaluator understanding of the operational dynamics of participation is limited. This exploratory descriptive study qualitatively examined twelve documents comprising retrospective reviews or case studies of participatory attempts for the purpose of identifying the factors that contribute to effective stakeholder participation . The study explored the participatory dynamics, the mechanisms by which participation is operationalized, and the relational dynamics between researcher and stakeholder. Four factors for practice were significant: the participatory process should reinforce the genuineness of stakeholder participation, participation is enabled by attention to group process, successful participation cultivates a sense of ownership, and stakeholder involvement creates ready-for-use conditions among participants. Although collaboration was shown to be a complex process, the benefits to evaluations are significant. Evaluations which involve multiple stakeholders are more likely to be sensitive to local contexts and result in increased validity and utilization. The participation of stakeholders in evaluation has important implications for the evaluator1 s role in facilitating the group process and attending to varied stakeholder learning styles. Extensive planning and preparation by the researcher impacts the meaningfulness of participation for stakeholders. Beneficiary involvement was shown to present unique challenges to evaluators, especially in the areas of access to information and equity of participation. Stakeholder participation in evaluation has tremendous implications for social policy and social work practice. Elements of authentic participation in evaluation correspond to factors which legitimize participation in policy settings. By redefining their roles and skills, social workers can enable service recipients to have real impact in evaluations, in policy planning and program development, and in their own treatment plans.
Ultra-broadband supercontinuum generation in gas-filled photonic-crystal fibers: The epsilon-near-zero regime
Creators: name: Saleh, Mohammed F.
name: Biancalana, Fabio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this Letter, we show theoretically that the nonlinear photoionisation process of a noble gas inside a hollow-core photonic crystal fibre can be exploited in obtaining broadband supercontinuum generation via pumping close to the mid-infrared regime. The interplay between the Kerr and photoionisation nonlinearities is strongly enhanced in this regime. Photoionisation continuously modifies the medium dispersion, in which the refractive index starts to significantly decrease and approach the epsilon-near-zero regime. Subsequently, the self-phase modulation induced by the Kerr effect is boosted because of the accompanied slow-light effect. As a result of this interplay, an output spectrum that comprises of a broadband light with multiple dispersive-wave emission is obtained.
description: 5 pages, 5 figures
Βιοαέριο – Εκμετάλλευση / Παραγωγή στο Δήμο Αμυνταίου
Creators: name: Κοντίνης, Νικόλαος Σπυρίδωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Βιομάζα
Αμύνταιο
Βιοαέριο
Biomass
Amyntaio
Biogas

description: Η συνεχής αύξηση του πληθυσμού και η αλόγιστη υπερκατανάλωση ενέργειας, η διαρκώς αυξανόμενη τιμή του πετρελαίου και ο φόβος εξάντλησής του, η εξόρυξη και χρήση των ορυκτών καυσίμων και οι περιβαλλοντικές επιπτώσεις της χρήσης τους είναι παράγοντες που ορίζουν το ενεργειακό πρόβλημα του πλανήτη. Το ενδιαφέρον για την παραγωγή και χρήση βιοαερίου ξεκίνησε στις αρχές της δεκαετίας του ’70 σαν αποτέλεσμα των κρίσεων του πετρελαίου. Το βιοαέριο το οποίο παράγεται κατά την διάθεση ή επεξεργασία οργανικών αποβλήτων και αστικών λυμάτων σε κεντρικές μονάδες συνδυασμένης χώνευσης, μπορεί να συμβάλλει μερικώς στην ενεργειακή αυτάρκεια της χώρας μας, υποκαθιστώντας ρυπογόνα ή εισαγόμενα καύσιμα. Η παρούσα εργασία έχει ως αντικείμενο τη διερεύνηση της αξιοποίησης της βιομάζας, ως ανανεώσιμη πηγή ενέργειας και την καταγραφή του ενεργειακού δυναμικού από αγροτικές καλλιέργειες, ζωικά απορρίμματα, της υλοτόμησης των δασών καθώς και του οργανικού κλάσματος αστικών στερεών αποβλήτων. Διερευνάται η Αναερόβια Χώνευση ως σύστημα ενεργειακής αξιοποίησης της βιομάζας, που είναι μια βιολογική διεργασία κατά την οποία παράγεται βιοαέριο από οργανική ύλη, υπό συνθήκες απουσίας οξυγόνου. Ως τελικό προϊόν προκύπτει σταθεροποιημένη ιλύς, η οποία μπορεί να χρησιμοποιηθεί ως εδαφοβελτιωτικό.
description: The continuous increase of population and the incalculable energy consumption, the continuous raise of the oil prices and the fear of the exhaustion of it, the quarrying and use of the mineral fuels and the environmental effects of this use, are factors that determine the energy problem of the planet. The interest in biogas production originated in the early seventies as a consequence of the oil crisis. In Greece, biogas produced from animals, vegetation’s and urban wastes in centralized anaerobic digestion plants could contribute towards energy independency, by substituting imported fuels. The present assignment deals with the exploitation of biomass as a renewable source of energy and register the energy source deriving from agriculture, animal wastes, woodcutting and the organic part of urban solid wastes. The anaerobic digestion investigated as a system of energetic biomass development. This biological process produces biogas from organic matter in the absence of oxygen. The final product is stabilized mad which can be used as fertilizer.
The universal Airy_1 and Airy_2 processes in the Totally Asymmetric Simple Exclusion Process
Creators: name: Ferrari, Patrik L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 82C22, 60K35, 15A52

description: In the totally asymmetric simple exclusion process (TASEP) two processes arise in the large time limit: the Airy_1 and Airy_2 processes. The Airy_2 process is an universal limit process occurring also in other models: in a stochastic growth model on 1+1-dimensions, 2d last passage percolation, equilibrium crystals, and in random matrix diffusion. The Airy_1 and Airy_2 processes are defined and discussed in the context of the TASEP. We also explain a geometric representation of the TASEP from which the connection to growth models and directed last passage percolation is immediate.
description: 13 pages, 4 figures, proceeding for the conference in honor of Percy Deift's 60th birthday
Reconstruction of Composite Events in Neutrino Telescopes
Creators: name: Ribordy, Mathieu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Neutrino telescopes detect the emission of Cherenkov light resulting from the tracks and showers of charged and neutral current neutrino interactions. These tracks or showers are reconstructed using a corresponding probability density function (PDF) which depends on measured time and location of the detected photo-electrons. We call a composite event the mixed detector response due to the juxtaposition of more than one Cherenkov light source (track or shower). This paper presents the construction of a generic PDF corresponding to a composite hypothesis. This composite PDF is therefore useful to reconstruct an arbitrary event topology and to favor or discard a given event topology hypothesis.
description: refeered version, accepted for publication, NIM A
Covering functors without groups
Creators: name: de la Peña, Jose Antonio
name: Redondo, Maria Julia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16G60

description: Coverings in the representation theory of algebras were introduced for the Auslander-Reiten quiver of a representation finite algebra by Riedtmann and later for finite dimensional algebras by Bongartz and Gabriel, R. Martinez-Villa and de la Peña. The best understood class covering functors is that of Galois covering functors F: A -> B determined by the action of a group of automorphisms of A. In this work we introduce the balanced covering functors which include the Galois class and for which classical Galois covering-type results still hold. For instance, if F:A -> B is a balanced covering functor, where A and B are linear categories over an algebraically closed field, and B is tame, then A is tame.
description: Some improvements have been made; in particular, the proof of Theorem 2 has been restructured and clarified