cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
AGN contamination in galaxy clusters: detection and cosmological impact
Creators: name: S. Bhargava
name: C. Garrel
name: E. Koulouridis
name: M. Pierre
name: I. Valtchanov
name: N. Cerardi
name: M. Aguena
name: B. J. Maughan
name: C. Baguley
name: M. E. Ramos-Ceja
name: C. Adami
name: L. Chiappetti
name: C. Vignali
name: J. P. Willis
Publisher: name: Zenodo
Year: 2022

description: We perform the first known census of X-ray clusters that are undetected due to significant central AGN contamination. In recent work (Bhargava et al. 2022, submitted to A&A), we attempt to characterise all known AGN contaminated clusters within the XXL survey footprint and provide a systematic assessment of the cosmological impact of such systems. We find that 5% of genuine clusters within the XXL survey area are undetected due to AGN contamination - the majority of these clusters are above z > 0.6, where X-ray cluster detection efficiency drops significantly and cosmological AGN activity increases. With the increased sensitivity of Athena, we can expect to recover clusters at the current X-ray photon limit up to approximately z ~ 1.9. Hence, the fraction of clusters missed due to AGN is likely to be higher than 5%. Understanding the distribution of AGN and clusters in X-ray samples is therefore crucial to maximise the cosmological potential of clusters, particularly at high redshift.
Cosmic Coincidence with a new Type of Dark Matter
Creators: name: Guendelman, E. I.
name: Kaganovich, A. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A field theory is proposed where the regular fermionic matter and the dark fermionic matter are different states of the same "primordial" fermion fields. In regime of the fermion densities typical for normal particle physics, the primordial fermions split into three families identified with regular fermions. When fermion energy density becomes comparable with dark energy density, the theory allows new type of states. The possibility of such Cosmo-Low Energy Physics (CLEP) states is demonstrated by means of solutions of the field theory equations describing FRW universe filled by homogeneous scalar field and uniformly distributed nonrelativistic neutrinos. Neutrinos in CLEP state are drawn into cosmological expansion by means of dynamically changing their own parameters. One of the features of the fermions in CLEP state is that in the late time universe their masses increase as a^{3/2} (a=a(t) is the scale factor). The energy density of the cold dark matter consisting of neutrinos in CLEP state scales as a sort of dark energy; this cold dark matter possesses negative pressure and for the late time universe its equation of state approaches that of the cosmological constant. The total energy density of such universe is less than it would be in the universe free of fermionic matter at all. The (quintessence) scalar field is coupled to dark matter but its coupling to regular fermionic matter appears to be extremely strongly suppressed.
description: 4 pages, presented to the proceedings of the Tenth Marcel Grossmann Meeting
title: Εφαρμογή πληθανίχνευσης για διαχείριση καταστάσεων φυσικών καταστροφών
title: Crowdsensing app for management of natural disaster situations
titleType: AlternativeTitle
Creators: name: Τσιμερέκης, Κωνσταντίνος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2024
Subjects: Κλιματική αλλαγή
Φυσικές καταστροφές
Λογισμικό πρόγραμμα
Kobotoolbox
Συλλογή δεδομένων

description: Τις τελευταίες δεκαετίες, οι επιπτώσεις της κλιματικής αλλαγής γίνονται ολοένα και πιο έντονες, επηρεάζοντας την ανθρώπινη κοινωνία σε πολλά και διαφορετικά επίπεδα όπως η οικονομία, η υγεία και το περιβάλλον. Μία κατηγορία από αυτές τις επιπτώσεις είναι και τα ποικίλα είδη φυσικών καταστροφών, οι οποίες συχνά προκαλούν εκτενείς καταστροφές και απειλούν ανθρώπινες ζωές. Για όλους αυτούς τους λόγους, η μελέτη και η πρόληψη τέτοιων φαινομένων αποτελούν πλέον αναπόσπαστο κομμάτι των περισσότερων κρατών ή οργανισμών που ασχολούνται με θέματα ανθρωπιστικής και περιβαλλοντικής κρίσης. Ταυτόχρονα, η σημαντική πρόοδος που έχουμε σημειώσει σε ποικίλους τεχνολογικούς τομείς επιτρέπει τη χρήση υπολογιστών και λογισμικών προγραμμάτων, στοχεύοντας στην γρηγορότερη και αποδοτικότερη συλλογή δεδομένων και κατά επέκταση τη σύνθεση πιο ολοκληρωμένων επιστημονικών μελετών. Έτσι, μπορούμε να κατανοήσουμε καλύτερα τα αίτια που προκαλούν τέτοιου είδους φαινόμενα, οπότε μπορούμε να σχεδιάσουμε και μέτρα πρόληψης ή/και αντιμετώπισής τους. Ένα τέτοιου είδους λογισμικό είναι η πλατφόρμα Kobotoolbox, που αποτελεί προϊόν της μη κερδοσκοπικής οργάνωσης Kobo και προσφέρει μία σειρά λειτουργιών για τη συλλογή, διαχείριση, οπτικοποίηση και εξαγωγή δεδομένων. Ένα από τα βασικότερα χαρακτηριστικά του λογισμικού είναι η λειτουργία της σε διαδικτυακό περιβάλλον, δίνοντας τη δυνατότητα συλλογής δεδομένων πραγματικού χρόνου και προσωρινής αποθήκευσης αυτών στην ίδια την πλατφόρμα. Η συγκεκριμένη διπλωματική εργασία έχει ως στόχο την ανάλυση των δυνατοτήτων της πλατφόρμας Kobotoolbox και των τρόπων με τους οποίους μπορεί να χρησιμοποιηθεί από αρμόδιες αρχές/υπηρεσίες, μελετητές ή ακόμα και πολίτες. Τέλος, παρουσιάζονται και τέσσερα ερωτηματολόγια που συνθέσαμε, για συγκεκριμένες κατηγορίες φυσικών καταστροφών, ώστε να γίνει πλήρως κατανοητή η χρησιμότητα αυτού του λογισμικού προγράμματος όσον αφορά την επικοινωνία μεταξύ των πολιτών και των ερευνητικών/οργανισμών πολιτικής προστασίας.
As Tetralogias de Antifonte no contexto forense grego do século V a. C.
Creators: name: Mendes, Paulo De Sousa
name: Pereira, Rui Soares
Publisher: name: Direito e Justiça
Year: 2013

description: Direito e Justiça, v. 2 n. Especial (2013): Estudos dedicados ao Professor Doutor Nuno José Espinosa Gomes da Silva
Asymptotics of Fredholm determinant associated with the Pearcey kernel
Creators: name: Dai, Dan
name: Xu, Shuai-Xia
name: Zhang, Lun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Pearcey kernel is a classical and universal kernel arising from random matrix theory, which describes the local statistics of eigenvalues when the limiting mean eigenvalue density exhibits a cusp-like singularity. It appears in a variety of statistical physics models beyond matrix models as well. We consider the Fredholm determinant of a trace class operator acting on $L^2\left(-s, s\right)$ with the Pearcey kernel. Based on a steepest descent analysis for a $3\times 3$ matrix-valued Riemann-Hilbert problem, we obtain asymptotics of the Fredholm determinant as $s\to +\infty$, which is also interpreted as large gap asymptotics in the context of random matrix theory.
description: 40 pages, 8 figures, reference updated
Advanced simulation techniques for straylight prediction of high performance mm-wave reflecting telescope
Creators: name: Sandri, M.
name: Villa, F.
name: Bersanelli, M.
name: Butler, R. C.
name: Mandolesi, N.
name: Tauber, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The prediction of the antenna radiation pattern can be extremely complex for antenna system composed of several reflector surfaces. Typically, at mm-wavelengths, telescopes are composed of mirrors and shields, and an accurate prediction of the whole system response is therefore complicated. This is the case for the optical system of the ESA Planck mission. Planck represents the third generation of mm-wave instruments designed for space observations of CMB anisotropies over the whole sky, and has unprecedented sensitivity and angular resolution. The Low Frequency Instrument (LFI) is one of the two instruments onboard the satellite. LFI consists of an array of 46 cooled HEMT-based receivers coupled to the 1.5 meter off-axis dual reflector telescope by an array of 23 dual profiled corrugated feed horns working at four frequencies between 30 and 100 GHz. Owing to the small level of CMB anisotropies, the control of the systematic effects is mandatory, and this is assured by means of a dedicated instrument design and by an accurate knowledge of instrument characteristics. The telescope is a source of systematic errors both in the main beam region (aberrations) and in the sidelobes region (straylight contamination) and efficient and accurate radiation pattern simulations of the telescope-feed system are needed. We report on the simulations of the full pattern applied to the Planck/LFI-Telescope system. These simulations, based on advanced GTD methods, are used to evaluate the straylight rejection of the entire optical system, by applying a new approach for evaluating the sidelobes in a rigorous way, even at very low levels.
description: On behalf of the Planck collaboration. 8 pages, 8 figures. Article published in the ESA Proceedings of the 25th ESA Antenna Workshop on Satellite Antenna Technology
Reflexões a propósito do acórdão po Kokkelvisserij do Tribunal Europeu dos Direitos do Homem: do direito de resposta às conclusões do advogado‑geral junto do TJUE
Creators: name: Martins, Patrícia Fragoso
Publisher: name: Direito e Justiça
Year: 2013

description: Direito e Justiça, v. 2 n. Especial (2013): Estudos dedicados ao Professor Doutor Nuno José Espinosa Gomes da Silva
Examining the Importance of Napping Privacy to UBC Students
Creators: name: Ng, Livia
name: Omar, Qutube
name: Park, Gloria
name: Quon, Olivia
name: Ratz, Allison
name: Wen, Winnie
Publisher: name: The University of British Columbia
Year: 2019

description: In today’s society, many adults are falling victim to sleep deprivation, which causes an overall reduction of productivity and performance amongst individuals. Past research on the subject matter mainly focuses on the various factors that aided an individual's sleep rather than on the design of the napping environment or napping unit. Noticing this gap in research, we decided to examine the impact of napping unit (nap pods and room design) privacy on students of the University of British Columbia (UBC). This study was conducted via an online questionnaire, in which participants were presented with five nap space scenarios and were then asked to rate how they felt in terms of our five dependant variables- privacy, anxiousness, comfort, and safety. The results revealed that UBC students preferred a more private nap pod, as it provides them with feelings of increased safety and comfortability; in addition, it caused them to feel less anxious about the idea of using the napping space that will be provided in the new Arts Student Centre. Moreover, our findings demonstrated that participants were not in favour of a surveillance camera canvassing the room. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Breves notas sobre os arts. 678.º, 691.º, 721.º e 721.º‑A do Código de Processo Civil
Creators: name: Pissarra, Nuno Andrade
Publisher: name: Direito e Justiça
Year: 2013

description: Direito e Justiça, v. 2 n. Especial (2013): Estudos dedicados ao Professor Doutor Nuno José Espinosa Gomes da Silva
Rise to the Challenge or Not Give a Damn: Differential Performance in High vs. Low Stakes Tests
Creators: name: Attali, Yigal
name: Neeman, Zvika
name: Schlosser, Analia
name: Attali, Yigal
name: Neeman, Zvika
name: Schlosser, Analia
Publisher: name: Unknown
Year: 2012
Subjects: Financial Economics

description: We study how different demographic groups respond to incentives by comparing their performance in “high” and “low” stakes situations. The high stakes situation is the GRE examination and the low stakes situation is a voluntary experimental section that examinees solved after the GRE. Males exhibit a larger difference in performance between the high and low stakes examinations than females, and Whites exhibit a larger difference in performance relative to Asians, Blacks, and Hispanics. The larger differential performance between high and low stakes tests among men and whites is partially explained by lower effort invested in the low stake test.
Oxidative stress, as measured by protein oxidation, is increased in primary Sjøgren's syndrome
Creators: name: Norheim, Katrine Brække
name: Jonsson, Grete
name: Harboe, Erna
name: Hanasand, Marita
name: Gøransson, Lasse
name: Omdal, Roald
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Objective: Oxidative stress is an imbalance between the production of reactive oxygen species (ROS) and physiological antioxidant defences. It occurs frequently in conditions characterized by immune activation and inflammation. Plasma levels of oxidized end products have never been evaluated in primary Sjøgren's syndrome (pSS). The aim of this study was to investigate the level of oxidative stress in primary Sjøgren's syndrome. As a secondary outcome, the association between oxidative stress and fatigue was explored. Methods: A cross-sectional study of 26 pSS patients was carried out. Oxidative stress was assessed using two markers of protein oxidation, protein carbonyl (PC) and advanced oxidation protein products (AOPP). Reference values for the oxidative stress markers were obtained from 15 healthy subjects. Results: AOPP and PC levels were increased in the pSS patients compared to the healthy subjects. This is a novel finding. There were no associations between oxidative stress measures and fatigue in the patients. Conclusions: Patients with pSS have increased levels of oxidative stress compared to healthy subjects.
Investigating Typed Syntactic Dependencies for Targeted Sentiment Classification Using Graph Attention Neural Network
Creators: name: Bai, Xuefeng
name: Liu, Pengbo
name: Zhang, Yue
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Targeted sentiment classification predicts the sentiment polarity on given target mentions in input texts. Dominant methods employ neural networks for encoding the input sentence and extracting relations between target mentions and their contexts. Recently, graph neural network has been investigated for integrating dependency syntax for the task, achieving the state-of-the-art results. However, existing methods do not consider dependency label information, which can be intuitively useful. To solve the problem, we investigate a novel relational graph attention network that integrates typed syntactic dependency information. Results on standard benchmarks show that our method can effectively leverage label information for improving targeted sentiment classification performances. Our final model significantly outperforms state-of-the-art syntax-based approaches.
description: Accepted by IEEE/ACM Transactions on Audio, Speech, and Language Processing (TASLP). See https://doi.org/10.1109/TASLP.2020.3042009 for final version
Exploring myopia management practices among eye care professionals in India: A knowledge, attitudes, practices, and barriers study
Creators: name: Pradhyumna, Hari Hara
name: Manoharan, Manoj K
name: Konda, Nagaraju
name: Verkicharla, Pavan K
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Medicine
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Rising myopia prevalence in Indian children necessitates an increase in the number of myopia practitioners across all states to effectively counteract its progression and prevent long-term visual impairment. There is limited information on how eye care practitioners perceive and practice myopia control treatments in India. This study aimed to assess the current knowledge, attitudes, practices, and barriers to initiating myopia management among eye care practitioners in India. A self-administered online questionnaire was distributed through social media platforms and emails to eye care practitioners from January 8 to 23, 2022. This survey comprised a total of 12 questions to seek information related to knowledge, attitudes, practices, and barriers associated with myopia management. Basic descriptive and percentage analyses were performed. Among the 423 respondents, optometrists were 66% (n = 279/423), followed by ophthalmologists (16%, n = 68/423) and trainees involving optometrists and ophthalmologists (18%, n = 76/423). Of all, only 22% (n = 94/423) indicated practicing myopia management. They gained knowledge through scientific articles (71%, n = 300/423), conferences, and continuous professional education (62%, n = 231/423). Low-concentration atropine eye drops are widely considered for myopia control by both optometrists (57%, n = 28/49) and ophthalmologists (97%, n = 38/39), along with behavioural and lifestyle modifications (55%, n = 27/49; 74%, n = 29/39). A smaller proportion preferred to under-correct myopia (20%, n = 19/94) to counteract progression. Among myopia practitioners, combination therapy was recommended by 24% (n = 12/49) of optometrists and 23% (n = 9/39) of ophthalmologists to halt progression if a single modality was ineffective. The major barriers to initiating myopia management were lack of awareness among parents (73%, n = 68/94), lack of education (34%, n = 143/423) and training (26%, n = 112/423) among practitioners, and unavailability of treatment modalities in various regions of India (18%, n = 76/423). Only 1 out of 5 practitioners was actively involved in practicing myopia management. Barriers must be minimised through various means to enable routine myopia practice in clinics.
On an explicit zero-free region for the Dedekind zeta-function
Creators: name: Lee, Ethan S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M99

description: We establish new explicit zero-free regions for the Dedekind zeta-function. Two key elements of our proof are a non-negative, even, trigonometric polynomial and explicit upper bounds for the explicit formula of the so-called differenced logarithmic derivative of the Dedekind zeta-function. The improvements we establish over the last result of this kind come from two sources. First, our computations use a polynomial which has been optimised by simulated annealing for a similar problem. Second, we establish sharper upper bounds for the aforementioned explicit formula.
description: 14 pages, 5 tables, small refinement made to the constant $C_3$ over the previous version
title: Environmental Impacts of Renewable Energy: a literature review.
Creators: name: Clarke, Alexander David
Publisher: name: The Open University
Year: 1995

description: A selection of the literature describing the environmental impacts of eight different renewable energy sources is reviewed; hydro, biomass, geothermal, wind, tidal, solar, wave and ocean thermal. The importance and status of environmental impacts to renewable energy sources is discussed and the character of the literature is considered. Starting with hydro electric power, the literature encompasses different perspectives; advocates of expansion of HEP due to its environmental advantages, or those stressing ecological and geomorphological impacts on flora, fauna. Some reviews concern environmental protection policy, involving tradeoffs, policy choices and bargaining. The environmental impacts of various sources of biomass such as forestry, agriculture, domestic and industrial wastes, and biofuels are reviewed. Biomass production and conversion is covered through assessment of soil resources and net energy output, energy forestry impacts, pollution from combustion, improved technologies such as gassification, and incineration of wastes and landfill gas. Geothermal energy's impacts are discussed through reviewing literature concerning air, water, seismicity, and noise pollution, land use, subsidence and some protection policy developments. The impacts of wind energy are similarly covered by topic: visual impact, noise, safety, electromagnetic intereference, wildlife, land use, public acceptability and planning. Several works on tidal energy are reviewed including most of the existing tidal energy plants, in terms of impact on flora, fauna, water quality, sediments, drainage and flooding. Solar energy's impacts are considered for the various different technologies; passive, thermal, concentrator, photovoltaic, and the impacts of manufacturing. Some studies of potential impacts from wave energy have been reviewed and one of ocean thermal energy. A chapter reviews the general renewable environmental impact literature, and another provides a brief overview of the valuation and costing of impacts. The final chapter considers the role and effects of environmental impact studies on the development of the technology.
Creation of classical and quantum fluxons by a current dipole in a long Josephson junction
Creators: name: Malomed, Boris
name: Ustinov, Alexey
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study static and dynamical properties of fluxons in a long annular Josephson junction (JJ) with a current injected at one point and collected back at a close point. Uniformly distributed dc bias current is applied too. We demonstrate that, in the limit of the infinitely small size of the current dipole, the critical value of the bias current density, above which static phase distributions do not exist, that was recently found (in the Fraunhofer's analytical form) for the annular JJ with the length much smaller than the Josephson penetration length, is valid irrespective of the junction's length, including infinitely long JJs. In a long annular JJ, the dipole generates free fluxon(s) if the bias current density exceeds the critical value. For long JJs, we also find another critical value (in an analytical form too), which is always slightly smaller than the Fraunhofer value, except for points where both values vanish. The static phase configuration which yields the new critical value is based on an unstable fluxon-antifluxon bound state, therefore it will probably not manifest itself in the usual (classical) regime. However, it provides for a dominating instanton configuration for tunnel birth of a free fluxon, hence it is expected to determine a quantum-birth threshold for fluxons at ultra-low temperatures. We also consider the interaction of a free fluxon with the complex consisting of the current dipole and antifluxon pinned by it. A condition for suppression of the net interaction force, which makes the long JJ nearly homogeneous for the free fluxon, is obtained in an analytical form. The analytical results are compared with numerical simulations.
description: Physical Review B, in press
Inert doublet as multicomponent dark matter
Creators: name: Betancur, Amalia
name: Palacio, Guillermo
name: Rivera, Andrés
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work, we study multicomponent dark sectors comprised of a fermionic and a scalar dark matter candidate. In the scalar sector, we mostly focus on the Inert Doublet Model while in the fermionic sector we study three different models. For all of them, we investigate the impact that dark matter conversion and regular WIMP dark matter annihilating processes have on the relic abundance. We mostly recover the region between the electroweak scale and $\sim$ 550 GeV for the scalar dark matter mass, which is usually excluded in the Inert Doublet Model. We also consider current constraints from both direct detection and indirect detection experiments and include future prospects to probe the models. Additionally, we investigate constraints from collider searches on the fermionic dark matter candidates.
description: 25 pages, 22 figures, Matches the version accepted for publication in Nuclear Physics B
Migration to the Cloud Ecosystem: Ushering in a New Generation of Platform Competition
Creators: name: Fershtman, Chaim
name: Gandal, Neil
name: Fershtman, Chaim
name: Gandal, Neil
Publisher: name: Unknown
Year: 2012
Subjects: subject: Financial Economics
subject: cloud computing
subject: platform competition
subject: network effects
subject: two-sided markets

description: Cloud computing is defined to be Internet based computing technology, where the term 'cloud' simply means Internet - and cloud computing refers to services that are accessed directly over the Internet. There are essentially three categories of cloud computing. (i) Iaas (Infrastructure as a Service) - number crunching, data storage and management services (computer servers), (ii), SaaS (Software as a Service) - 'web based' applications, and (iii) PaaS (Platform as a Service) - essentially an operating system in the cloud. Much of the attention and literature has focused on the revolution in Iaas services provided via the cloud. Despite the major changes in technology in IaaS services, estimates indicate that more than 90% of the cloud computing market (in terms of revenues) will involve (virtual) operating systems and applications software services (i.e., PaaS and SaaS services.) In this paper, we examine how several key economic factors will likely affect competition in SaaS/PaaS services in the cloud.
Enhanced charge transport properties in heteroatomic (NH, O, Se) analogs of benzotrithiophene (BTT) isomers: a DFT insight
Creators: name: Anuj Tripathi
name: Prabhakar Chetti
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry

description: A comprehensive comparative study of the geometry, optoelectronic and charge transport properties in benzotrithiophene (BTT), benzotripyrrole (BTP), benzotrifuran (BTF) and benzotriselenophene (BTSe) and their possible isomers are reported by employing density functional theory (DFT). The motive of this work is to examine the role of different heteroatoms (NH, O and Se) on optical and charge transport properties. The optimised molecules display planar geometry, which is ideal for organic semiconductor applications. The absorption properties of all the molecules are calculated using time-dependent density functional theory (TDDFT). Nucleus independent chemical shift (NICS) calculations are performed to see the stability and aromatic character in these molecules. The calculated hole and electron reorganisation energies (λh and λe) for majority of the isomers in each series are smaller than that of typical hole and electron transport material (TPD and Alq3). BTP series isomers are with exceptionally small λe values (10–60 meV), which means these isomers are better for electron transport materials. The quantum chemical results show that HOMO, LUMO, HOMO–LUMO gap, and reorganisation energies along with ionisation potentials and electron affinities are significantly affected by changing the heteroatoms. The smaller hole and electron reorganisation energies of these molecules suggest possible use in OLEDs.
Last syzygies of 1-generic spaces
Creators: name: Bothmer, Hans-Christian v.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13D02; 14M12

description: Consider a determinantal variety X of expected codimension definend by the maximal minors of a matrix M of linear forms. Eisenbud and Popescu have conjectured that 1-generic matrices M are characterised by the property that the syzygy ideals I(s) of all last syzygies s of X coincide with I_X. In this note we prove a geometric version of this characterization, i.e. that M is 1-generic if and only if the syzygy varieties Syz(s)=V(I(s)) of all last syzyzgies have the same support as X.
description: AMS Latex, 11 Pages
Safe and Sound (Asleep) : Sleep Pod Safety Perceptions
Creators: name: Pavlakovic, Rachel
name: Sandhar, Palvi
name: Tang, Rebecca
name: Liang, Tony
name: Ruan, Yingjun
name: Kotsos, Nick
Publisher: name: The University of British Columbia
Year: 2019

description: The purpose of our research was to discover which features of the napping pod environment would be perceived as the most safe. In order to answer this question, we surveyed 103 undergraduate students, all of who are currently studying at the University of British Columbia. The level of safety respondents felt when napping in sleep pods was measured by a survey containing 10 questions, an outline of which is included in appendix A. Respondents were able to rate their felt safety on a scale ranging from 1 (I don’t feel very safe) to 7 (I feel very safe). There was an additional question at the end of the survey, which allowed participants to comment and address any other safety concerns they had regarding the implementation of sleep pods on campus. The results of the survey showed that, while students would generally feel safe napping in sleep pods, the introduction of secure storage for belongings and the inclusion of interior locks on the sleep pods, account for the greatest increase in perceived safety. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Natsushima Miura & Laubier 1990
Creators: name: Salazar-Vallejo, Sergio I.
name: Carrera-Parra, Luis F.
name: Muir, Alexander I.
name: León-González, Jesús Angel De
name: Piotrowski, Christina
name: Sato, Masanori
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Chrysopetalidae
Natsushima

description: Natsushima Miura & Laubier, 1990 graciliceps Miura & Hashimoto, 1996: Kagoshima Bay, Kyushu, Japan. NSMT 356, USNM 172131, LACM 1736, JAMSTEC
description: Published as part of Salazar-Vallejo, Sergio I., Carrera-Parra, Luis F., Muir, Alexander I., León-González, Jesús Angel De, Piotrowski, Christina & Sato, Masanori, 2014, Polychaete species (Annelida) described from the Philippine and China Seas, pp. 1-68 in Zootaxa 3842 (1) on page 21, DOI: 10.11646/zootaxa.3842.1.1, http://zenodo.org/record/4928482
The emergence of prime numbers as the result of evolutionary strategy
Creators: name: Campos, Pauoo R. A.
name: de Oliveira, Viviane M.
name: Giro, R.
name: Galvao, Douglas S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We investigate by means of a simple theoretical model the emergence of prime numbers as life cycles, as those seen for some species of cicadas. The cicadas, more precisely, the Magicicadas spend most of their lives below the ground and then emerge and die in a short period of time. The Magicicadas display an uncommon behavior: their emergence is synchronized and these periods are usually prime numbers. In the current work, we develop a spatially extended model at which preys and predators coexist and can change their evolutionary dynamics through the occurrence of mutations. We verified that prime numbers as life cycles emerge as a result of the evolution of the population. Our results seem to be a first step in order to prove that the development of such strategy is selectively advantageous, especially for those organisms that are highly vulnerable to attacks of predators.
description: 11 pages and 4 figures
A Case for Maximum Wage
Creators: name: Blumkin, Tomer
name: Sadka, Efraim
name: Shem-Tov, Yotam
name: Blumkin, Tomer
name: Sadka, Efraim
name: Shem-Tov, Yotam
Publisher: name: Unknown
Year: 2013
Subjects: subject: Financial Economics
subject: Labor and Human Capital
subject: redistribution
subject: maximum wage

description: In this paper we demonstrate that supplementing the optimal non-linear income tax system with a binding maximum wage rule attains a Pareto improvement, by serving to mitigate the mimicking incentives of the high-skill individuals without entailing distortions.
Sylvester rank functions for amenable normal extensions
Creators: name: Jiang, Baojie
name: Li, Hanfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We introduce a notion of amenable normal extension S of a unital ring R with a finite approximation system F, encompassing the amenable algebras over a field of Gromov and Elek, the twisted crossed product by an amenable group, and the tensor product with a field extension. It is shown that every Sylvester matrix rank function rk of R preserved by S has a canonical extension to a Sylvester matrix rank function rk_F for S. In the case of twisted crossed product by an amenable group, and the tensor product with a field extension, it is also shown that rk_F depends on rk continuously. When an amenable group has a twisted action on a unital C*-algebra preserving a tracial state, we also show that two natural Sylvester matrix rank functions on the algebraic twisted crossed product constructed out of the tracial state coincide.
description: Proposition 9.6 is added. 45 pages. To appear in J. Funct. Anal
On-sky silicon photomultiplier detector performance measurements for millisecond to sub-microsecond optical source variability studies
Creators: name: Lau, Albert Wai Kit
name: Shafiee, Mehdi
name: Smoot, George F.
name: Grossan, Bruce
name: Li, Siyang
name: Maksut, Zhanat
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In our Ultra-Fast Astronomy (UFA) program, we aim to improve measurements of variability of astronomical targets on millisecond and shorter time scales. In this work, we present initial on-sky measurements of the performance of silicon photomultiplier detectors (SiPMs) for UFA. We mounted two different SiPMs at the focal plane of the 0.7-meter aperture Nazarbayev University Transient Telescope at the Assy-Turgen Astrophysical Observatory (NUTTelA-TAO), with no filter in front of the detector. The $3mm\times3mm$ SiPM single-channel detectors have a field of view of $2.2716'\times2.2716'$. During the nights of 2019 October 28-29, we measured sky background, bright stars, and an artificial source with a 100Hz flashing frequency. We compared detected SiPM counts with Gaia satellite G-band flux values to show that our SiPMs have a linear response. With our two SiPMs (models S14520-3050VS and S14160-3050HS), we measured a dark current of $\sim$130 and $\sim$85 kilo counts per second (kcps), and a sky background of $\sim$201 and $\sim$203 kcps, respectively. We measured an intrinsic crosstalk of 10.34$\%$ and 10.52$\%$ and derived a 5$σ$ sensitivity of 13.9 and 14.0 Gaia G-band magnitude for 200ms exposures, for the two detectors respectively. For a 10 $μ$s window, and allowing a false alarm rate of once per 100 nights, we derived a sensitivity of 22 detected photons, or 6 Gaia G-band magnitudes. For nanosecond timescales, our detection is limited by crosstalk to 12 detected photons, which corresponds to a fluence of $\sim$155 photons per square meter.
Welfare Stigma Re-examined
Creators: name: Blumkin, Tomer
name: Margalioth, Yoram
name: Sadka, Efraim
name: Blumkin, Tomer
name: Margalioth, Yoram
name: Sadka, Efraim
Publisher: name: Unknown
Year: 2013
Subjects: subject: Financial Economics
subject: Labor and Human Capital
subject: Stigma
subject: Welfare Ordeal
subject: Social Norms

description: We dissect welfare stigma into two types: traditional and statistical, and show that the latter can be employed as a desirable form of a welfare ordeal, as its costs are positively correlated with ability.
Shinkai Miura & Laubier 1990
Creators: name: Salazar-Vallejo, Sergio I.
name: Carrera-Parra, Luis F.
name: Muir, Alexander I.
name: León-González, Jesús Angel De
name: Piotrowski, Christina
name: Sato, Masanori
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Chrysopetalidae
Shinkai

description: Shinkai Miura & Laubier, 1990 longipedata Miura & Ohta, 1991: Middle Okinawa Trough (photos: Miura 1997a). NSMT 332, JAMSTEC 16496, USNM 131513, MNHN 1171 semilonga Miura & Hashimoto, 1996: Okinawa Trough, Japan. NSMT 355, USNM 172129, LACM 1733, 1734, JAMSTEC
description: Published as part of Salazar-Vallejo, Sergio I., Carrera-Parra, Luis F., Muir, Alexander I., León-González, Jesús Angel De, Piotrowski, Christina & Sato, Masanori, 2014, Polychaete species (Annelida) described from the Philippine and China Seas, pp. 1-68 in Zootaxa 3842 (1) on page 21, DOI: 10.11646/zootaxa.3842.1.1, http://zenodo.org/record/4928482
Golden Parachutes and the Wealth of Shareholders
Creators: name: Bebchuk, Lucian
name: Cohen, Alma
name: Wang, Charles C.Y.
name: Bebchuk, Lucian
name: Cohen, Alma
name: Wang, Charles C.Y.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Financial Economics
subject: Golden parachute
subject: executive compensation
subject: corporate governance
subject: acquisitions
subject: takeovers
subject: acquisition likelihood
subject: acquisition premiums
subject: agency costs
subject: managerial slack
subject: Tobin's Q
subject: Dodd-Frank

description: Golden parachutes have attracted substantial attention from investors and public officials for more than two decades. We find that golden parachutes are associated with higher expected acquisition premiums, and that this association is at least partly due to the effect of golden parachutes on executive incentives. However, we find that firms that adopt a golden parachute experience a reduction in their industry-adjusted Tobin’s Q, as well as negative abnormal stock returns both during and subsequent to the inter-volume period of adoption. This finding raises the possibility that, despite their facilitating some value-increasing acquisitions, golden parachutes have, on average, an overall negative effect on shareholder wealth; this effect could be due to GPs weakening the force of the market for control and thereby increasing managerial slack and/or providing executives with incentives to go along also with some value-decreasing acquisitions that do not serve shareholders’ long-term interests. Our findings have significant implications for ongoing debates on golden parachutes and suggest the need for additional work identifying the type of GPs that drive the correlation between GPs and reduced shareholder value.
José de Seabra da Silva e a sua família: iconografia e mobilidade social no antigo regime
Creators: name: Gorjão‑Henriques, Miguel
Publisher: name: Direito e Justiça
Year: 2013

description: Direito e Justiça, v. 2 n. Especial (2013): Estudos dedicados ao Professor Doutor Nuno José Espinosa Gomes da Silva
O Conceito de «actividade dirigida» inscrito no artigo 15.º, número 1, alínea c), do regulamento «Bruxelas I» e a internet: subsídios do tribunal de Justiça por ocasião do acórdão Pammer/ALPENHOF
Creators: name: Fernandes, Maria João Matias
Publisher: name: Direito e Justiça
Year: 2013

description: Direito e Justiça, v. 2 n. Especial (2013): Estudos dedicados ao Professor Doutor Nuno José Espinosa Gomes da Silva
Buridanic Competition
Creators: name: Bachi, Benjamin
name: Spiegler, Ran
name: Bachi, Benjamin
name: Spiegler, Ran
Publisher: name: Unknown
Year: 2014
Subjects: Financial Economics

description: We analyze a model in which two profit-maximizing firms compete in two-attribute products over agents who follow a non-compensatory choice procedure that responds purely to ordinal quality rankings: sticking to a default option when no market alternative dominates another, and focusing on a random attribute when choosing by default is impossible. Our equilibrium analysis highlights the effect of such trade-off avoidance on various aspects of the market outcome: total quality of the offered products, amount of obfuscation, prevalence of "hard choices", as well as market participation and consumer switching rates. We discuss the potential implications of this analysis for "default architecture".
Desconsideração da personalidade jurídica e tutela de credores
Creators: name: Ribeiro, Maria De Fátima
Publisher: name: Direito e Justiça
Year: 2013

description: Direito e Justiça, v. 2 n. Especial (2013): Estudos dedicados ao Professor Doutor Nuno José Espinosa Gomes da Silva
Long Period Variables detected by ISO in the SMC
Creators: name: Cioni, M. -R. L.
name: Blommaert, J. A. D. L.
name: Groenewegen, M. A. T.
name: Habing, H. J.
name: Hron, J.
name: Kerschbaum, F.
name: Loup, C.
name: Omont, A.
name: van Loon, J. Th.
name: Whitelock, P. A.
name: Zijlstra, A. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This article presents the study of the light-curves extracted from the MACHO database of a sample of stars observed by the ISO in the SMC. These stars belong to the ISO-Mini-Survey catalogue of the Magellanic Clouds (ISO-MCMS, Loup et al. in preparation). Most of them are in the AGB and supergiant phases. The dominant period and amplitude of pulsation have been derived and the stars have been classified as Mira or Semi-Regular pulsators. Furthermore, the cross-identification with near-infrared DENIS and 2MASS magnitudes available within the ISO-MCMS allowed us: (i) to investigate the properties of these stars in the combined near- and mid-infrared colour-magnitude diagrams, (ii) to derive the bolometric magnitude by integrating the spectral energy distribution and (iii) to estimate the mass-loss rate. The stars have been divided into carbon- (C-) and oxygen-rich (O-rich) using the (J-Ks, Ks) colour-magnitude diagram and their period and amplitude distributions have been compared. C-rich AGB stars have a sharp peak in their period distribution at about 250 days and have on average a larger amplitude than O-rich AGB stars. This effect, not previously detected from the study of similar stars in the LMC and in the Baade's window, might be closely related to the metallicity of the environment in which the stars have formed.
description: 14 pages, 10 figures, 5 tables (2 electronic), accepted for publication by A&A
title: Farmers Actions and Attitudes with Respect to Agricultural Pollution
Creators: name: McArthur, Christopher Ian
Publisher: name: The Open University
Year: 1995

description: Research has been undertaken by me to establish farmer attitudes and actions regarding control of livestock wastes and associated pollution problems. Little research has been attempted in this area, despite new legislation being imposed on the farming community. The aim of my study was to establish by a series of interviews and questionnaires, with a random selection of farmers, their opinions and levels of knowledge in respect of environmental topics such as:- legislation, pollution, financial and information sources. From my research a number of important issues have been detailed that should assist regulatory authorities such as MAFF and NRA, to work more effectively with the agricultural community, in controlling pollution arising from livestock wastes. Enforcement of legislation pertaining to agricultural wastes is rigorously enforced in UK yet little information exists as to the expected improved river water quality that should result. Farmers have indicated to me that continuation of the grant for effluent control schemes is crucial, if their co-operation and financial viability is to be maintained in this area of environmental improvement. The approach by the authorities to farmers has been demonstrated to be fragmented and contradictory. Although they utilise some formal advice, it is the articles in agricultural journals that are frequently used to provide detail on new legislation and practical requirements. It has been found that such articles are generally technically accurate and are seasonal, to represent current problems. Some evidence has been found that authorities do not always apply regulatory requirements in an even and correct manner. Lack of training and detailed guidelines is evident from my research and there is a need to address these concerns. The authorities must consider the cost benefits for the environment question, to sustain a strategy, that has cost significant sums to individual farmers and the tax payer. The attitudes of most farmers approached was positive in respect of environmental matters and little difference was detected between the groups of active and non-environmentalists. Many of the livestock farmers undertook remedial work at their own instigation when pollution occurred, with NRA insistence being in the minority. It has found however that number of farm pollution incidents are now beginning to decrease on an annual basis, due to a number of interrelated factors. A more effective working relationship between all parties involved is necessary, if a sustained improvement in river water quality is to be achieved on a consistent basis.
The Market for Keywords
Creators: name: Eliaz, Kfir
name: Spiegler, Ran
name: Eliaz, Kfir
name: Spiegler, Ran
Publisher: name: Unknown
Year: 2014
Subjects: subject: Financial Economics
subject: Marketing
subject: FOS: Economics and business
subject: keywords

description: Can a competitive market implement an ideal search engine? To address this question, we construct a two-sided market model in which consumers with limited, idiosyncratic vocabulary use keywords to search for their desired products. Firms get access to a keyword if they pay its competitive price-per-click. An underlying "broad match" function determines the probability with which a firm will enter the consumer’s search pool as a function of the keyword it "buys" and the consumer’s queried keyword. The main question we analyze is whether there exists a broad match function that gives rise to an efficient competitive equilibrium outcome. We provide necessary and sufficient conditions, in terms of the underlying search cost and the joint distribution over consumers’ tastes and vocabulary, and characterize equilibrium keyword prices under such equilibria. The Battachayyara coefficient, a measure of closeness of probability distributions, turns out to play a key role in the analysis.