cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Assimilation of range-and-depth-averaged sound speed in Fram Strait
Creators: name: , Geyer
name: Gopalakrishnan
name: , Sagen
name: , Cornuelle
name: , Mazloff
name: Challet
Publisher: name: Zenodo
Year: 2023
Subjects: Acoustic thermometry
Arctic
ocean model
data assimilation
Fram Strait

description: Abstract: Acoustic thermometry measurements of ocean sound speed were used to improve state estimates of ocean temperature in Fram Strait. This is the first time that large-scale acoustic measurements have been assimilated into an ocean model in the Arctic. From September 2010 to July 2012 the Acoustic Technology for Observing the Interior of the Arctic Ocean (ACOBAR) experiment measured acoustic travel times between Greenland and Spitsbergen. These acoustic tomography measurements were taken along 167-301 km long sections between 3 bottom-mounted moorings. The measurements were inverted to yield time series of range-and-depth-averaged ocean sound speed for 0-1000 m ocean depth. The ocean sound speed time series was assimilated into a regional numerical ocean model using the Massachusetts Institute of Technology General Circulation Model-Estimating the Circulation and Climate of the Ocean four-dimensional variational (MITgcm-ECCO 4DVAR) assimilation system. The data assimilation improved the range-and-depth-averaged ocean temperatures at the independent 78°50’N oceanographic mooring section in Fram Strait (0-1000 m depth). The RMS error of the ocean state estimate (0.21°C) was comparable to the uncertainty of the interpolated mooring section (0.23°C). The lack of depth information in the assimilated ocean sound speed measurements caused an increased temperature bias at shallow depths (0-200 m). The temporal correlations with the mooring section were not improved because short-term variations in the mooring measurements and the ocean state estimate did not coincide in time. This was likely due to the small-scale eddying and non-linearity of the ocean circulation in Fram Strait. Furthermore, the horizontal resolution of the state estimate (4.5 km) was eddy-permitting, rather than eddy resolving. Therefore, the state estimate could not represent the full ocean dynamics of the region. This study demonstrates the usefulness of large-scale acoustic measurements for improving ocean state estimates at high latitudes. How to cite the abstract: Geyer, F., Gopalakrishnan, G., Sagen, H., Cornuelle, B., Mazloff, M., and Challet, F.: Assimilation of range-and-depth-averaged sound speed in Fram Strait, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-2621, https://doi.org/10.5194/egusphere-egu23-2621, 2023.
description: This poster was produced with support from the U.S. Office of Naval Research under the CANAPE-UNDER ICE project (Grant no. N62909-19-1-2012). Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the Office of Naval Research. The results will be utilised in the EC funded High Arctic Ocean Observation System (HiAOOS) project.
Constraining the dark energy equation of state using Bayes theorem and the Kullback-Leibler divergence
Creators: name: Hee, S.
name: Vázquez, J. A.
name: Handley, W. J.
name: Hobson, M. P.
name: Lasenby, A. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Data-driven model-independent reconstructions of the dark energy equation of state $w(z)$ are presented using Planck 2015 era CMB, BAO, SNIa and Lyman-$α$ data. These reconstructions identify the $w(z)$ behaviour supported by the data and show a bifurcation of the equation of state posterior in the range $1.5{
description: 9 pages, 3 tables, 5 figures; published in MNRAS
A first-principles approach to physics based on locality and operationalism
Creators: name: Oeckl, Robert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Starting from the guiding principles of spacetime locality and operationalism, a general framework for a probabilistic description of nature is proposed. Crucially, no notion of time or metric is assumed, neither any specific physical model. Remarkably, the emerging framework converges with a recently proposed formulation of quantum theory, obtained constructively from known quantum physics. At the same time the framework also admits statistical theories of classical physics.
description: 8 pages, LaTeX + PoS, contribution to the proceedings of the conference "Frontiers of Fundamental Physics 14" (Marseille, 2014)
Displacement and annihilation of Dirac gap-nodes in d-wave iron-based superconductors
Creators: name: Chubukov, Andrey V.
name: Vafek, Oskar
name: Fernandes, Rafael M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Several experimental and theoretical arguments have been made in favor of a $d-$wave symmetry for the superconducting state in some Fe-based materials. It is a common belief that a $d-$wave gap in the Fe-based superconductors must have nodes on the Fermi surfaces centered at the $Γ$ point of the Brillouin zone. Here we show that, while this is the case for a single Fermi surface made out of a single orbital, the situation is more complex if there is an even number of Fermi surfaces made out of different orbitals. In particular, we show that for the two $Γ$-centered hole Fermi surfaces made out of $d_{xz}$ and $d_{yz}$ orbitals, the nodal points still exist near $T_{c}$ along the symmetry-imposed directions, but are are displaced to momenta between the two Fermi surfaces. If the two hole pockets are close enough, pairs of nodal points can merge and annihilate at some $T
description: 7 pages, 4 figures, submitted to PRB, references added
title: Ð¡ÑÐ°ÑÐ¸ÑÑÐ¸ÐºÐ°. ÐÐ½Ð°Ð»Ð¸Ð· Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ ÑÑÐ´Ð¾Ð² Ð² MS Excel
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
title: Statistics. Time series analysis in MS Excel
Creators: name: ÐÐ½ÑÐ¸Ð¿Ð¾Ð², Ð¡ÐµÑÐ³ÐµÐ¹
name: ÐÐ¾Ð¿Ð¾Ð²Ð°, ÐÐ»ÑÐ³Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐÐ°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÑÐ°ÑÐ¸ÑÑÐ¸ÐºÐ°
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Ð°Ð²ÑÐ¾ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ñ
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Ð°Ð²ÑÐ¾ÑÐµÐ³ÑÐµÑÑÐ¸Ñ
ÑÑÐµÐ±Ð½Ð¸ÐºÐ¸ Ð¸ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ñ Ð´Ð»Ñ Ð²ÑÐ·Ð¾Ð²

description: Ð ÑÑÐµÐ±Ð½Ð¾Ð¼ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ð¸ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÑÑÑÑ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ MS Excel Ð´Ð»Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÑÐ°ÑÐ¸ÑÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ ÑÑÐ´Ð¾Ð² Ð² Ð¾Ð±ÑÐµÐ¼Ðµ, Ð´Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð¼ Ð´Ð»Ñ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐ¸ÑÐ¾ÐºÐ¾Ð³Ð¾ ÐºÑÑÐ³Ð° Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð·Ð°Ð´Ð°Ñ. Ð ÐµÐºÐ¾Ð¼ÐµÐ½Ð´ÑÐµÑÑÑ ÑÑÑÐ´ÐµÐ½ÑÐ°Ð¼ Ð¸Ð½ÑÑÐ¸ÑÑÑÐ° Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¼ÐµÐ½ÐµÐ´Ð¶Ð¼ÐµÐ½ÑÐ°, ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸ Ð¸ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸, Ð¸Ð·ÑÑÐ°ÑÑÐ¸Ð¼ Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½Ñ Â«Ð¡ÑÐ°ÑÐ¸ÑÑÐ¸ÐºÐ°Â». ÐÐ¾ÑÐ¾Ð±Ð¸Ðµ Ð¼Ð¾Ð¶ÐµÑ Ð±ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¾ ÑÑÑÐ´ÐµÐ½ÑÐ°Ð¼Ð¸ Ð´Ð½ÐµÐ²Ð½Ð¾Ð¹, Ð²ÐµÑÐµÑÐ½ÐµÐ¹ Ð¸ Ð·Ð°Ð¾ÑÐ½Ð¾Ð¹ ÑÐ¾ÑÐ¼ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ, Ð° ÑÐ°ÐºÐ¶Ðµ Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°Ð¼Ð¸ Ð¸ Ð¼Ð°Ð³Ð¸ÑÑÑÐ°Ð¼Ð¸ Ð¿ÑÐ¸ Ð½Ð°Ð¿Ð¸ÑÐ°Ð½Ð¸Ð¸ Ð²ÑÐ¿ÑÑÐºÐ½ÑÑ ÑÐ°Ð±Ð¾Ñ; Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ°Ð¼Ð¸, Ð½Ð°ÑÑÐ½ÑÐ¼Ð¸ Ð¸ Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ð¼Ð¸ ÑÐ°Ð±Ð¾ÑÐ½Ð¸ÐºÐ°Ð¼Ð¸, ÑÑÐ¾Ð»ÐºÐ½ÑÐ²ÑÐ¸Ð¼Ð¸ÑÑ Ñ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ÑÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÑÐ°ÑÐ¸ÑÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸ÑÑÐ¾Ð´Ð½ÑÑ Ð´Ð°Ð½Ð½ÑÑ.
description: The textbook discusses the possibilities of using MS Excel for the implementation of statistical methods of time series analysis in a volume sufficient to solve a wide range of practical tasks. It is recommended to students of the Institute of Industrial Management, Economics and Trade studying the discipline "Statistics". The manual can be used by full-time, evening and part-time students, as well as bachelors and masters when writing graduate papers; graduate students, researchers and practitioners who are faced with the need to use statistical methods of processing source data.
Paul Hild: Netzwerke der lokalen Arbeitsmarktpolitik. Steuerungsprobleme in theoretischer und empirischer Hinsicht, Berlin: edition sigma, 1997, ISBN 3-89404-446-2, 241 S., DM 39,-
Creators: name: Fischer, Joachim
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: 300
subject: 650

description: Arbeit
On the Stokes matrices of the $tt^*$-Toda equation
Creators: name: Horocholyn, Stefan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: Primary 81T40, Secondary 53D45, 35J60, 34M40

description: We derive a formula for the signature of the symmetrized Stokes matrix $\cal{S}+\cal{S}^\mathrm{T}$ for the $tt^*$-Toda equation. As a corollary, we verify a conjecture of Cecotti and Vafa regarding when $\cal{S}+\cal{S}^\mathrm{T}$ is positive definite, reminiscent of a formula of Beukers and Heckmann for the generalized hypergeometric equation. The condition that $\cal{S}+\cal{S}^\mathrm{T}$ is positive definite is prominent in the work of Cecotti and Vafa on the $tt^*$ equation; we show that the Stokes matrices $\cal{S}$ satisfying this condition are parameterized by the points of an open convex polytope.
description: 18 pages; to appear in the Tokyo Journal of Mathematics. Comments & constructive criticism welcome!
The Influence of Favorable Disposition toward Events on Customers Purchase Behavior The Case of Arki Mineral Water Industry PLC
Creators: name: Kemal, Mukerem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The objective of this research paper is to provide a better understanding of how event marketing is implemented and to test the influence of favorable disposition toward events on customer purchase behavior. In order to answer the questions non-probability sampling specifically purposive sampling technique was used. Both quantitative and qualitative methods were used. But it was more qualitative nature. Closed ended questions distributed to 384 customers and open ended question to the marketing manager and personnel's of the company. The closed ended question aimed to test the influence of favorable disposition toward events on customer purchase behavior while the open ended questions aimed to answer about objective, selection, evaluation and advantages and disadvantages of event marketing. The results revealed that favorable disposition toward events have positive and significant relationship on customer purchase behavior since it allows customers to have an experience and creates impulses to act and with regards to the objectives of using event marketing strengthening the existing image, identifying the company and brand/ product with the target audience and achieving media coverage are very important. When it comes to selection of events, companies use different criteria to select a specific event. The advantage of using event marketing is offering interaction which results in generating awareness and influencing image. The major disadvantage was lack of standardized solution and the difficulty to measure the effectiveness. Based on the findings the major recommendations were, the company should have clear objectives, use event marketing with other promotional tools, should develop their own methods to measure the effectiveness of the events and the company should create unique and entertaining events so that the customers have favorable disposition and positive experience which increases their purchase behavior.
Changement de dispositif de perfusion dans un service de néonatologie : impact sur les infections et la satisfaction des soignants
Creators: name: Larue, Victoria
name: Barreto, Christine
name: Barbeau, Pauline
name: Constant, Hélène
name: Plaisant, Franck
name: Butin, Marine
Publisher: name: Health & Co
Year: 2023
Subjects: Néonatologie
Dispositif médical
Infection du cathéter
Infection associée aux soins
Surveillance des infections

description: Contexte et objectifs. En réanimation néonatale, les patients ont souvent besoin d’un accès veineux de type cathéter veineux central (CVC). Ce CVC est à risque de complications et, notamment, d’infections liées au cathéter. Un nouveau dispositif de perfusion, conçu pour la néonatologie, a été mis en place en avril 2019 dans notre hôpital. L’objectif principal était d’évaluer l’impact de ce nouveau dispositif en réanimation néonatale sur le risque infectieux. L’objectif secondaire était d’évaluer la satisfaction des soignants concernant son utilisation. Méthode. Une étude rétrospective a été menée sur les données de janvier 2018 à février 2019 (ancien montage : système Octopus®, Vygon) et de mai 2019 à juin 2020 (nouveau montage sur mesure avec valves NanoClaveTM, ICU Medical). Les densités d’incidence d’infections liées au cathéter de chaque période ont été comparées. L’ergonomie d’utilisation a été évaluée par un questionnaire auprès des 120 infirmiers du service. Résultats. Durant la première période, 434 patients étaient porteurs d’au moins un CVC, contre 413 pendant la seconde. Les populations étaient comparables à la naissance pour l’âge gestationnel et le poids. Le nombre de cathéters était respectivement de 662 et 684 et le taux d’incidence d’infections liées au cathéter de 8,6 et 9,1 pour 100 cathéters. Les densités d’incidence d’infections liées au cathéter n’étaient pas significativement différentes (8,2 vs 8,9 pour 1 000 jours-cathéter ; p=0,75). Les 62 infirmiers qui ont complété le questionnaire étaient tous satisfaits ou très satisfaits du dispositif. Conclusions. L’utilisation du nouveau dispositif de perfusion n’a pas permis de diminuer le taux d’infection mais il est apprécié par l’équipe soignante sans présenter de surrisque d’infection.
Bernhard Vogt: Franz Oppenheimer. Wissenschaft und Ethik der Sozialen Marktwirtschaft, Studien zur Geistesgeschichte, Bd. 22, Bodenheim: Philo Verlag, 1997, ISBN 3-8257-0059-3, 346 S., DM 64,-
Creators: name: Kruse, Volker
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: 300
subject: 650

description: Arbeit
Dg analogues of the Zuckerman functors and the dual Zuckerman functors I
Creators: name: Hayashi, Takuma
Publisher: name: arXiv
Year: 2015
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We study the category of dg Harish-Chandra modules (over an arbitrary commutative ring) and construct dg analogues of the induction functor, the production functor, the Zuckerman functor and the dual Zuckerman functor.
description: The proofs of general theorems on symmetric monoidal categories were added. The construction of the differential graded analogue of the dual Zuckerman functor was simplified
Franz Oppenheimer: Gesammelte Schriften, hrsg. von Julius H. Schoeps, Alphons Silbermann und Hans Süssmuth in Verbindung mit Bernhard Vogt: Band I: Theoretische Grundlegung, Berlin: Akademie-Verlag, 1995, ISBN 3-05-002673-1, XIII u. 736 S., DM 174,-; Band II: Politische Schriften. Erster Teil: Die Utopie des "Liberalen Sozialismus"; Zweiter Teil: Staat, Nationalismus und Demokratie, Berlin: Akademie-Verlag, 1996, ISBN 3-05-002876-9, IX u. 576 S., DM 174,-; Band III: Schriften zur Marktwirtschaft. Erster Teil: Nationalökonomie und Wirtschaftspolitik; Zweiter Teil: Marktwirtschaft, Berlin: Akademie-Verlag, 1998, 817 S., DM 198,-
Creators: name: Kruse, Volker
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: 300
subject: 650

description: Arbeit
The Impact of Financial Liberalization on the ownership, Market Structure and Performance of The Ethiopian Banking Industry
Creators: name: Boru, Tesfaye
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2027

description: Ensuriing tthe effiiciiency and sttabiilliitty of tthe bankiing systtem can pllay a viittall rolle for tthe successfull iimpllementtattiion of tthe monettary and economiic polliiciies of a counttry.. Yett,, tto achiieve such objjecttiive iitt woulld be essenttiiall tto pllace fiinanciiall reform measures tthatt enhance tthe conttriibuttiion of tthe bankiing systtem ttowards economiic devellopmentt.. An embllemattiic reform measure underttaken by tthe Etthiiopiian governmentt commenciing tthe year 1992 was "lliiberalliiziing "tthe fiinanciiall secttor.. The aiim of tthe sttudy iis tto assess tthe iimpactt of fiinanciiall lliiberalliizattiion on tthe ownershiip sttructture,, markett concenttrattiion and profiittabiilliitty performance of tthe Etthiiopiian bankiing iindusttry.. The sttudy found outt tthatt tthe reform has broughtt a llott of remarkablle changes on tthe sttructture and performance of tthe bankiing secttor as compared wiitth tthe siittuattiions prevallentt before tthe reform periiod.. However,, tthe reform has resttriictted tthe advanttages tthatt coulld be obttaiined from a diiversiifiied ownershiip sttructture viia prohiibiittiing operattiion of foreiign banks and parttiiciipattiion of tthe priivatte secttor tto tthe ownershiip of governmentt banks.. Furtthermore ,,as ttestted by botth ttwo fiirm concenttrattiion rattiio and HHI usiing ttottall deposiitts,, lloans,, capiittall and assetts,, tthe bankiing iindusttry iin Etthiiopiia can sttiillll be diisttiinguiished by iitts markett concenttrattiion ttowards tthe biig governmentt owned commerciiall banks and by a markett charactteriized by lliittttlle and iinsuffiiciientt compettiittiion.. The profiittabiilliitty of tthe iindusttry has allso shown a ttremendous iimprovementt aftter tthe reform measure has been ttaken.. However,, tthe exiisttiing governmentt banks are enjjoyiing haviing tthe hiigher share of profiitt from tthe iindusttry and sttiillll tthe pattttern of tthe iindusttry profiitt iis follllowiing tthe profiittabiilliitty sttructture of tthe giiantt bank,, CBE.. The sttudy iidenttiifiied and recommended areas tthatt need furtther lliiberalliizattiion measures so as tto enhance tthe performance of tthe iindusttry.. Yett,, iitt shoulld be seen as a fiirstt sttep,, nott tthe llastt word iin tthiis diirecttiion..
Massive Star Formation in the LMC. I. N159 and N160 Complexes
Creators: name: Gordon, Michael S.
name: Jones, Terry J.
name: Gehrz, Robert D.
name: Helton, L. Andrew
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present images and spectral energy distributions (SEDs) of massive young stellar objects (YSOs) in three star-forming H II regions of the Large Magellanic Cloud: N159A, N159 Papillon, and N160. We use photometry from SOFIA/FORCAST at 25.3--37.1 um to constrain model fits to the SEDs and determine luminosities, ages, and dust content of the embedded YSOs and their local environments. By placing these sources on mid-infrared color-magnitude and color-color diagrams, we analyze their dust properties and consider their evolutionary status. Since each object in the FORCAST images has an obvious bright near-infrared counterpart in Spitzer Space Telescope images, we do not find any evidence for new, very cool, previously-undiscovered Class 0 YSOs. Additionally, based on its mid-infrared colors and model parameters, N159A is younger than N160 and the Papillon. The nature of the first extragalactic protostars in N159, P1 and P2, is also discussed.
description: 31 pages, 8 figures, 3 tables. Accepted for publication in ApJ, November 2016
Heterogeneous substitution systems revisited
Creators: name: Ahrens, Benedikt
name: Matthes, Ralph
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Matthes and Uustalu (TCS 327(1-2):155-174, 2004) presented a categorical description of substitution systems capable of capturing syntax involving binding which is independent of whether the syntax is made up from least or greatest fixed points. We extend this work in two directions: we continue the analysis by creating more categorical structure, in particular by organizing substitution systems into a category and studying its properties, and we develop the proofs of the results of the cited paper and our new ones in UniMath, a recent library of univalent mathematics formalized in the Coq theorem prover.
description: 24 pages
The Role of Tourism Sector in Generating Employment Opportunity and Augmenting Household Income in the Case of Bishoftu City of Oromia Regional State of Ethiopia
Creators: name: Batu, Assefa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Tourism industry is known for its potential in generating employment opportunity and income. Thus this study is conducted primarily to identify the social group that are benefiting from tourism activity in Bishoftu, and whether the net earnings from the employment in the tourism enterprises have anything to do with livelihood improvement of the local community. With this in mind the study addresses the contribution and the performance of tourist enterprises in generating employment and income in Bishoftu. Further, an effort is made to find out the major constraints for the development of tourism at national as well as Bishoftu level. Data were collected from both primary and secondary sources. Primary data was collected using key informant interview and questionnaire by approaching key actors in the tourism industry in Bishoftu city. Thus, 80 sample populations were selected to fill the questionnaire. An interview was also held with 25 key informants. The study employed descriptive research design with combinations of qualitative and quantitative approaches. The data were analyzed and the result of the analysis was presented in descriptive statistics formats including frequency, tables, chart, graphs, percentages and ratios.The study concludes that tourist flow, income and employment generated from tourism is growing steadily. Tourism is contributing a lot to the economic growth and unemployment reduction both at national and Bishfotu level. Also tourism is improving the socio-economical life of the local community of Bishoftu. In order to overcome the current challenges and hence exploit tourism's potential to the fullest limit the researcher forwarded recommendations
$8π$-periodic dissipationless ac Josephson effect on a quantum spin-Hall edge via a Quantum magnetic impurity
Creators: name: Hui, Hoi-Yin
name: Sau, Jay D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Time-reversal invariance places strong constraints on the properties of the quantum spin Hall edge. One such restriction is the inevitability of dissipation in a Josephson junction between two superconductors formed on such an edge without the presence of interaction. Interactions and spin-conservation breaking are key ingredients for the realization of dissipationless ac Josephson effect on such quantum spin Hall edges. We present a simple quantum impurity model that allows to create a dissipationless fractional Josephson effect on a quantum spin Hall edge. We then use this model to substantiate a general argument that shows that any such non-dissipative Josephson effect must necessarily by $8π$-periodic.
description: 8 pages, 6 figures
Determinants of Performance of Employees Savings and Credit associations In Ethiopia (A case study of Ethio Telecom)
Creators: name: Wakgari, Tadael
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Employee saving and credit associations (ESCAs) were financial sector operating behind a wall in Ethiopia. The members were dramatically benefited from the associations as a source of financing and investment for several years with a little general public recognition. The sectors are primarily established for the interest of their members, saving, loan financing and an extra dividend on the idle cash saved within the association. The number of cooperatives in general currently approaches 1,500, excluding a small unions and voluntary cooperative not licensed. The study was aimed to determine to what extent the loan management, saving capacity of members, technology adoption, and Literacy status of workers and members had affected performance of ESCAs. As a sample case study ETC ESCA was used. It has 7,200 members from those for 379 sample size questionnaires were distributed and 361 were actually collected and analyzed. The study was facilitated by use of primary data and secondary data. The study adopted descriptive research design and inferential statistics in which multiple regression analysis was applied to the data to examine the effects of explanatory variables on performance of ESCAs. The main finding of the study is that; explanatory variables such as Loan management, Saving capacity of members, Technology adoption, and Literacy status of workers and members have positive significant effect on performance of ESCAs. But Saving capacity of members has no significant effect on performance of ESCAs. All explanatory variables have strong positive correlation with the performance of ESCAs. Keywords: Saving, Credit, Performance, Loan management, saving capacity, Technology adoption, and Literacy status.
The canonical Luminous Blue Variable AG Car and its neighbor Hen 3-519 are much closer than previously assumed
Creators: name: Smith, Nathan
name: Stassun, Keivan G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The strong mass loss of Luminous Blue Variables (LBVs) is thought to play a critical role in massive-star evolution, but their place in the evolutionary sequence remains debated. A key to understanding their peculiar instability is their high observed luminosities, which often depends on uncertain distances. Here we report direct distances and space motions of four canonical Milky Way LBVs---AG~Car, HR~Car, HD~168607, and (candidate) Hen~3-519---from the Gaia first data release. Whereas the distances of HR~Car and HD~168607 are consistent with previous literature estimates within the considerable uncertainties, Hen~3-519 and AG~Car, both at $\sim$2~kpc, are much closer than the 6--8~kpc distances previously assumed. As a result, Hen~3-519 moves far from the locus of LBVs on the HR Diagram, making it a much less luminous object. For AG~Car, considered a defining example of a classical LBV, its lower luminosity would also move it off the S~Dor instability strip. Lower luminosities allow both AG~Car and Hen~3-519 to have passed through a previous red supergiant phase, lower the mass estimates for their shell nebulae, and imply that binary evolution is needed to account for their peculiarities. These results may also impact our understanding of LBVs as potential supernova progenitors and their isolated environments. Improved distances will be provided in the Gaia second data release, which will include additional LBVs. AG~Car and Hen~3-519 hint that this new information may alter our traditional view of LBVs.
description: 15 pages, 2 figures, 1 table. Accepted by Astronomical Journal
The LPM effect in sequential bremsstrahlung: dimensional regularization
Creators: name: Arnold, Peter
name: Chang, Han-Chih
name: Iqbal, Shahin
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The splitting processes of bremsstrahlung and pair production in a medium are coherent over large distances in the very high energy limit, which leads to a suppression known as the Landau-Pomeranchuk-Migdal (LPM) effect. Of recent interest is the case when the coherence lengths of two consecutive splitting processes overlap (which is important for understanding corrections to standard treatments of the LPM effect in QCD). In previous papers, we have developed methods for computing such corrections without making soft-gluon approximations. However, our methods require consistent treatment of canceling ultraviolet (UV) divergences associated with coincident emission times, even for processes with tree-level amplitudes. In this paper, we show how to use dimensional regularization to properly handle the UV contributions. We also present a simple diagnostic test that any consistent UV regularization method for this problem needs to pass.
description: 59 pages, 8 figures [main change from v1: addition of the new appendix B summarizing more about use of the i*epsilon prescription in earlier work]
STRENGTHENING DISASTER RESILIENCE THROUGH SOCIAL WORK EDUCATION IN BOTSWANA
Creators: name: Kgomotso, Mpho Sebina
name: Modiri, Bontle Kgathi
Publisher: name: SADI journals
Year: 2024
Subjects: subject: Social Work
subject: FOS: Sociology
subject: Natural Disasters
subject: Disaster Response
subject: Botswana
subject: 1999/2000 Floods

description: Social work, as a dynamic and multifaceted profession, confronts a diverse array of challenges that impact humanity in various ways. This includes addressing issues arising from natural disasters, which exhibit a range of types, magnitudes, and intensities. Globally, disasters wreak havoc on infrastructure, claim human lives, trigger economic downturns, and contribute to environmental degradation (Kadi, 2006). Not exempt from these challenges, Botswana faces its own share of natural disasters, encompassing drought, floods, wildfires, animal diseases, earthquakes, tremors, pest infestations, epidemics, and the pervasive influence of HIV and AIDS.

The widespread occurrence of drought affects the entire country, while floods disrupt normalcy during the rainy season from October to March. Veld fires become prevalent during the dry months from April to November, peaking in July. The comprehensive impact of these disasters is underscored by the devastating floods experienced in 1999/2000, which affected 23 administrative districts, cities, towns, and villages across Botswana. This catastrophic event resulted in the loss of human lives, substantial damage to 17,000 structures (comprising both public and private assets), extensive environmental harm, crop destruction, and the displacement of thousands of individuals (United Nations Development Programme (UNDP), 2009).

This study aims to explore the role of social work in the context of natural disasters in Botswana, with a specific focus on the 1999/2000 floods. By examining the challenges faced and lessons learned during this critical period, the research seeks to contribute to the broader understanding of social work's efficacy in disaster response and management. The implications of natural disasters on communities, the environment, and the economy necessitate a comprehensive and responsive approach within the realm of social work
Assessing Progress in Ethiopia Towards Eradication of Extreme Poverty and Hunger as Part of Goal one of the Millennium Development Goals
Creators: name: Kitessa, Ashenafi
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: In Ethiopia, just like many African countries, it is the high incidence of poverty and hunger that served as a push factor for the adoption and integration of the Millennium Development Goals (MDGs) in to the national development plans. The progress towards achievement of the MDGs and eradication of extreme poverty and hunger in Ethiopia has not been researched after 2005 as a result of the unavailability of data i.e. the 2010 HICES and WMS. In addition to this, the agglomerated impact of external challenges such as the global economic challenge, recurrent drought and low agricultural productivity on the achievement of the MDG goal one has not been researched. In line of these gaps, the following research objectives were set including; i. showing the achievements made so far in terms of meeting the MDG goal one targets ii. Identifying the challenges encountered, opportunities gained and prospects for achieving the goal by 2015. To achieve the objective of the study secondary data were acquired from Welfare Monitoring Surveys and Household Income, Consumption and Expenditure surveys published by the Central Statistics Agency. To complement the aforementioned data, the results of Ethiopian Demographic and Health Survey, variety of reports published by Ministry of Finance and Economic Development and, various agencies of the United Nations have been used. With the help of poverty headcount, gap and severity indices, the progress made so far in terms of reduction of poverty have been addressed. In addition to this, the issues of inequality and hunger have been discussed with the help of gini coefficient, Lorenz curve and anthropometric measures of nutrition. To date significant progresses have been observed in terms of halving the proportion of the poor and those who suffer from hunger. However, there appears to be a long way to go for the creation of decent employment opportunity for all. Despite the progresses made in terms of halving the proportion of the poor and those who suffer from hunger, the overwhelmingly high dependence of the government budget on external assistances and loans, the poor macro-economic management that resulted in soaring inflation and increasing trade deficit, the traditional and drought stricken nature of agriculture, climatic change and global economic challenges such as rise in food and oil prices, and the limited ability of the government to cope up with such shocks make the progresses made unsustainable and make many vulnerable to slip back again to poverty. Hence, the continuation of the current trend of strong economic growth and pro poor spending, focus on export oriented and import substituting industries and, the structural transformation of agriculture and the introduction of commercial farms are critical in terms of ensuring the continuity of the progresses made
Massive scalar field evolution in de Sitter
Creators: name: Markkanen, Tommi
name: Rajantie, Arttu
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The behaviour of a massive, non-interacting and non-minimally coupled quantised scalar field in an expanding de Sitter background is investigated by solving the field evolution for an arbitrary initial state. In this approach there is no need to choose a vacuum in order to provide a definition for particle states. We conclude that the expanding de Sitter space is a stable equilibrium configuration under small perturbations of the initial conditions. Depending on the initial state, the energy density can approach its asymptotic value from above or below, the latter of which implies a violation of the weak energy condition. The backreaction of the quantum corrections can therefore lead to a phase of super-acceleration also in the non-interacting massive case.
description: 22 pages, 5 figures. v2: References added. v3: Expanded text, added references. Version accepted by JHEP
Global Hadamard form for the Green Function in Schwarzschild space-time
Creators: name: Casals, Marc
name: Nolan, Brien
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The retarded Green function of a wave equation on a 4-dimensional curved background spacetime is a (generalized) function of two spacetime points and diverges when these are connected by a null geodesic. The Hadamard form makes explicit the form of this divergence but only when one of the points is in a normal neighbourhood of the other point. In this paper we derive a representation for the retarded Green function for a scalar field in Schwarzschild spacetime which makes explicit its {\it complete} singularity structure beyond the normal neighbourhood. We interpret this representation as a sum of Hadamard forms, the summation being taken over the number of times the null wavefront has passed through a caustic point: the sum of Hadamard forms applies to the non-smooth contribution to the full Green function, not only the singular contribution. (The term non-smooth applies modulo the causality-generating step functions that must appear in the retarded Green function.) The singularity structure is determined using two independent approaches, one based on a Bessel function expansion of the Green function, and another that exploits a link between the Green functions of Schwarzschild spacetime and Pleba{ń}ski-Hacyan spacetime (the latter approach also yields another representation for the {\it full} Schwarzschild Green function, not just for its non-smooth part). Our representation is not valid in a neighbourhood of caustic points. We deal with these points by providing a separate representation for the Green function in Schwarzschild spacetime which makes explicit its (different) singularity structure at caustics of this spacetime.
description: 39 pages, 3 figures. In this version we have tidied up the paper throughout and added the new part on relating the Green functions in Schwarzschild and Pleba{\'n}ski-Hacyan spacetimes
Assessment of services quality towards customers Satisfaction: the case of commercial bank of Ethiopia North Addis Ababa district
Creators: name: Assefa, Dariebo
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The aim of this research is to asses possible effect of service quality of CBE on customer satisfaction using service quality dimensions tangibility, reliability, responsiveness, empathy and assurance. The population of this research consists of commercial bank of Ethiopia North Addis district. The Perceived service quality of the bank measurable by using 26 items SERVQUAL scale. In order to test the research structural equation modeling technique was used empirical findings of the research show that perceived service quality of the bank affect customer satisfaction directly and positively. The correlation analysis it was found that all the five service quality dimensions are positively correlated with overall customer satisfaction .The regression analysis tangibility and responsiveness found to be the most important dimension affecting customer satisfaction with the highest beta value. From this we can say that perceived service quality leads to satisfaction.
Free skew monoidal categories
Creators: name: Bourke, John
name: Lack, Stephen
Publisher: name: arXiv
Year: 2017
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: In the paper "Triangulations, orientals, and skew monoidal categories", the free monoidal category Fsk on a single generating object was described. We sharpen this by giving a completely explicit description of Fsk, and so of the free skew monoidal category on any category. As an application we describe adjunctions between the operad for skew monoidal categories and various simpler operads. For a particular such operad L, we identify skew monoidal categories with certain colax L-algebras.
description: v3: published version
Integral models of Harish-Chandra modules of the finite covering groups of PU(1,1)
Creators: name: Hayashi, Takuma
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We compute integral models of real and cohomological induction for finite covering groups of PU(1,1).
description: Corollary 5.12 -- Remark 5.15 and their variants are added. To appear in Journal of Algebra 579
Semileptonic and leptonic $B$ decays, circa 2016
Creators: name: Ricciardi, Giulia
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We summarize the status of semileptonic and leptonic $B$ decays, including $|V_{cb}|$ and $|V_{ub}|$ exclusive and inclusive determinations, decays to excited states of the charm meson spectrum and decays into $τ$ leptons.
description: 18 pages, no figures; small changes, including added references, to match published version
Factors Affecting Passengers' Purchase Decision In An Airline Industry: The Case Of Ethiopian Airlines
Creators: name: Shegena, Henok
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The main goal of this research is to find out the factors that affect passengers' purchase decisions of Ethiopian airlines for their international air ticket purchase. It tried to order the factors according to their significance effect on the passengers' purchase decisions. The paper also covered to see if the factors have any different effect across the demographic profile of respondents. The study examined seven factors that were taken from prior research works. All responses were collected by using a structured questionnaire through convenience sampling (n=370). Data was analyzed using SPSS software to obtain descriptive statistics, comparing mean scores (i.e. independent t-test and ANOVA) and other analyses (i.e. correlation analysis and multiple linear regressions). According to the study findings, three factors: loyalty program, ground and inflight services and safety record identified as the main factors that customers of Ethiopian airlines perceive to be important in influencing their purchase decision. The finding of the study showed that there is a significance difference in perceiving the seven factors between and among the customers of Ethiopian airlines with different demographic profiles.
A Technique to Share Multiple Secret Images
Creators: name: Rajput, Mohit
name: Deshmukh, Maroti
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Visual Cryptography comes under cryptography domain. It deals with encrypting and decrypting of visual information like pictures, texts, videos $ etc.$ Multi Secret Image Sharing (MSIS) scheme is a part of visual cryptography that provides a protected method to transmit more than one secret images over a communication channel. Conventionally, transmission of a single secret image is possible over a channel at a time. But as technology grows, there emerge a need for sharing more than one secret image. An $(n, n)$-MSIS scheme is used to encrypt $n$ secret images into $n$ meaningless noisy images that are stored over different servers. To recover $n$ secret images all $n$ noisy images are required. At earlier time, the main problem with secret sharing schemes was that attacker can partially figure out secret images, even by getting access of $n-1$ or fewer noisy images. To tackle with this security issue, there arises a need of secure MSIS scheme, so that attacker can not retrieve any information by using less than $n-1$ noisy images. In this paper, we propose a secure $(n, n+1)$-MSIS scheme using additive modulo operation for grayscale and colored images. For checking the effectiveness of proposed scheme; Correlation, MSE and PSNR techniques are used. The experimental results show that the proposed scheme is highly secured and altering of noisy images will not reveal any partial information about secret images. The proposed $(n, n+1)$-MSIS scheme outperforms the existing MSIS schemes in terms of security.
description: 10 pages, 3 figures
Flat Base Change Formulas for $(\mathfrak{g},K)$-modules over Noetherian rings
Creators: name: Hayashi, Takuma
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: The fucntor $I$ and its derived functor over the complex number field have been playing important roles in representation theory of real reductive Lie groups. In this paper, we discuss the flat base change formulas of the functor I and its derived functor over Noetherian rings. In particular, a flat base change theorem for $A_{\mathfrak{q}}(λ)$ is obtained.
description: 34 pages
Cost Estimation Practices of Emerging Contractors of Ethiopia: The Case of Addis Ababa Based Local Contractors
Creators: name: Mengistu, Samuel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The construction sector in Ethiopia is one of the critical economic institutions in the economic development of the country. However, some firms, in this sector seem to fail quickly. And many have faced difficulty in winning tenders in bidding stage. Consequently this research has the objectives of analyzing tender cost estimation practice, identifying deficiencies requiring remedial actions and recommending solutions that can enhance the performance of local emerging construction firms. The population used was restricted to Addis Ababa based emerging construction firms. The population of 412 firms registered as Grade 5 and above, from the different category of contractors is studied. To address the research objective 135 samples are selected based on snowball sampling method and questionnaire is distributed from which 98 sample respondents replied appropriately to the questionnaire. The literature was reviewed on cost estimation and related aspects. The research tool used was a questionnaire. Data gathered are analyzed using statistical tools. As a result the study revealed that: cost estimation is one of the major causes that aggravate emerging contractors deprived success in tendering. Likewise with regard to leading practices related to quality cost estimates, the study found out that the performance of emerging contractors towards cost estimation requirements is low. Emerging firms are advised to make internal policy or guidelines for developing high quality cost estimates, to practice/ adopt a method that utilizes risk identification and uncertainty analysis techniques and to implement a system of integrated cost estimating practice via utilization of the twelve cost estimating tasks in order to ensure a high quality estimate. Keywords: Cost estimation, Quality estimates, estimation methods, tendering
Visualizing a Bosonic Symmetry Protected Topological Phase in an Interacting Fermion Model
Creators: name: Wu, Han-Qing
name: He, Yuan-Yao
name: You, Yi-Zhuang
name: Yoshida, Tsuneya
name: Kawakami, Norio
name: Xu, Cenke
name: Meng, Zi Yang
name: Lu, Zhong-Yi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Symmetry protected topological (SPT) phases in free fermion and interacting bosonic systems have been classified, but the physical phenomena of interacting fermionic SPT phases have not been fully explored. Here, employing large-scale quantum Monte Carlo simulation, we investigate the edge physics of a bilayer Kane-Mele-Hubbard model with zigzag ribbon geometry. Our unbiased numerical results show that the fermion edge modes are gapped out by interaction, while the bosonic edge modes remain gapless at the $(1+1)d$ boundary, before the bulk quantum phase transition to a topologically trivial phase. Therefore, finite fermion gaps both in the bulk and on the edge, together with the robust gapless bosonic edge modes, prove that our system becomes an emergent bosonic SPT phase at low energy, which is, for the first time, directly observed in an interacting fermion lattice model.
description: 5 pages, 5 figures in the main text; 5 pages, 8 figures in the supplemental material