cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Logistics Time and Cost Analysis Case of Lubricant Supply of Libya Oil Ethiopia Limited
Creators: name: Gulma, Petros
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Efficiency of logistics and supply chain can be source of distinct competitive advantage for an organization. On the other hand failure on properly undertaking logistics and supply chain activities can cause organization to incur big costs in the form of demurrage and storage that will affect company profitability. This research is done to review the logistics aspect of lubricant supply of Libya Oil Ethiopia limited by reviewing the logistics time and cost dimension and the impact it will have on the company profitability. The whole import transactions during the years 2012 and 2013 are reviewed using the company data base as a source .As part of quantitative analysis lead time on lubricant importation and cost per liter of lubricant is determined using average and compared. As part of qualitative analysis key informant interview, review of contracts and intercompany correspondence is made. The researcher found out the lead time for lubricant importation to be 6.34 and 4.48 months in the years 2012 and 2013 respectively. Delays after vessel arrival until uplifting containers from either of the ports and delays until delivering back empty containers are found to be major source of demurrage and port storage charges which affect company profitability. The researcher also found out Ex work cost and logistics costs to be major component of the total lubricant cost per liter. It is the recommendation of this research that any endeavor that reduce the production lead time and the time it take to get foreign currency approval will have substantial impact in an attempt to reduce supply chain lead time. On top of this, as Ex work cost is major component of the cost of product, focused effort to get lubricant at reduced ex factory cost will substantially reduce the total cost of products and ultimately improve company profitability. It is also the recommendation of this research for further studies on lubricant logistics and supply chain to be conducted in the context of Ethiopia
Graphene-WS$_2$ heterostructures for tunable spin injection and spin transport
Creators: name: Omar, Siddhartha
name: van Wees, Bart J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the first measurements of spin injection in to graphene through a 20 nm thick tungsten disulphide (WS$_2$) layer, along with a modified spin relaxation time (τs) in graphene in the WS$_2$ environment, via spin-valve and Hanle spin-precession measurements, respectively. First, during the spin-injection into graphene through a WS$_2$-graphene interface, we can tune the interface resistance at different current bias and modify the spin injection efficiency, in a correlation with the conductivity-mismatch theory. Temperature assisted tunneling is identified as a dominant mechanism for the charge transport across the interface. Second, we measure the spin transport in graphene, underneath the WS$_2$ crystal and observe a significant reduction in the τs down to 17 ps in graphene in the WS$_2$ covered region, compared to that in its pristine state. The reduced τs indicates the WS$_2$-proximity induced additional dephasing of the spins in graphene.
description: 7 Pages, 6 figures
Peter Scherrer, Rolf Simons, Klaus Westermann (Hg.): Von den Nachbarn lernen. Wirtschafts- und Beschäftigungspolitik in Europa, mit einem Geleitwort von Monika Wulf-Mathies, Standortdebatte. Eine Publikationsreihe der Hans Böckler-Stiftung, Marburg: Schüren-Verlag, 1998, ISBN 3-89472-196-0, 276 S., DM 38,-
Creators: name: Bartmann, Hermann
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: 300
subject: 650

description: Arbeit
Helical propulsion in shear-thinning fluids
Creators: name: Gomez, Saul
name: Godinez, Francisco
name: Lauga, Eric
name: Zenit, Roberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Swimming microorganisms often have to propel in complex, non-Newtonian fluids. We carry out experiments with self-propelling helical swimmers driven by an externally rotating magnetic field in shear-thinning, inelastic fluids. Similarly to swimming in a Newtonian fluid, we obtain for each fluid a locomotion speed which scales linearly with the rotation frequency of the swimmer, but with a prefactor which depends on the power index of the fluid. The fluid is seen to always increase the swimming speed of the helix, up to 50% faster and thus the strongest of such type reported to date. The maximum relative increase for a fluid power index of around 0.6. Using simple scalings, we argue that the speed increase is not due to the local decrease of the flow viscosity around the helical filament but hypothesise instead that it originates from confinement-like effect due to viscosity stratification around the swimmer.
Explicit reconstruction of the entanglement wedge
Creators: name: Kim, Jung-Wook
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The problem of how the boundary encodes the bulk in AdS/CFT is still a subject of study today. One of the major issues that needs more elucidation is the problem of subregion duality; what information of the bulk a given boundary subregion encodes. Although the proof given by Dong, Harlow, and Wall states that the entanglement wedge of the bulk should be encoded in boundary subregions, no explicit procedure for reconstructing the entanglement wedge was given so far. In this paper, mode sum approach to obtaining smearing functions for a single bulk scalar is generalised to include bulk reconstruction in the entanglement wedge of boundary subregions. It is generally expectated that solutions to the wave equation on a complicated coordinate patch are needed, but this hard problem has been transferred to a less hard but tractable problem of matrix inversion.
description: version accepted by JHEP; added references and discussions on covariance
Determinants Of Export Performance: (The Case Of Selected Textile And Garment Firms In Ethiopian)
Creators: name: Derese, Deribe
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Over recent years, there has been an increased interest in Africa as a continent with immense resources and potentials. Different initiative; like American Duty free market, COMESA, AGOA has been playing the major role of promoting Sub-Saharan Africa's country integration into the multilateral trading system and empowering them to have more active roles in global trade negotiations. The overall objective of the study is to identify and examine major International marketing challenges and opportunities of Selected Ethiopian textile and Garment Firms. This study used explanatory research approach and empirical research design to assess and determine Determinants of export performance of selected export oriented textile and Garment Firms in Ethiopian and major contributing factors to them. The primarily data which collected through structured questionnaire and past years export secondary data was used for analysis, secondary data analyzed in tabulation whereas primary data analyzed through IMB SPSS statistical software 20 and the result was interpreted. The potential limitation of the research is the availability of marketing data on the shelf and implementation methodological limitation due to data constraints. The findings from this research revealed that firm specific characteristic and marketing mix strategy appeared to be significant predictors of export performance. However, surprisingly the finding also reviled that environmental characteristic and government support, do not influence Export performance. In terms of magnitude of effect, marketing mix strategy is superior. Finally, Textile and Garment firms should strength and inject more resources in marketing mix strategy to obtain better result in export, and should undertake the following measures: influence the government to revise its policy on the magnitude of cost of capital imposed on working and investment capital; utilizing the internal and external resource; Integrating their marketing Mix strategies; support their market channels. Further research should be in-depth in the subject area by incorporating additional variable those not used in this study.
Comments on "New findings on Stratigraphy of the Paleocene-Early Eocene successions in Lorestan Zone, Iran" by Maghfouri Moghaddam et al. [Carbonates and Evaporites (2022) 37:13]
Creators: name: Hadi, Mehdi
Publisher: name: Zenodo
Year: 2022
Subjects: Eocene; Larger Benthic Foraminifera, Shallow Benthic Zones, Zagros Mountains

description: Maghfouri Moghaddam et al. (2022) studied two stratigraphic sections from the Paleocene–Eocene deposits of the Chenareh anticline (Zagros region, SW Iran). According to the biostratigraphic ranges of planktonic and larger benthic foraminifera, the authors suggested planktonic foraminiferal biozones P2 to P5 (Late Danian to Early Ypresian) and shallow benthic zones (SBZ) 6–8 (Early Ypresian) for the studied sections. A detailed review of the larger foraminifera identified reveal incorrect taxonomic determinations, resulting in invalid SBZ age assignments.
title: Die zukünftige Bedeutung multimedialer Kommunikationsnetze
title: Ausgewählte Ergebnisse der Delphi'98-Studie
titleType: AlternativeTitle
title: The future importance of multimedia networks. Select results of the Delphi '98 study
titleType: AlternativeTitle
Creators: name: Blind, Knut
name: Zoche, Peter
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: applications
subject: Delphi-method
subject: information and communication technology
subject: multimedia networks
subject: 300
subject: 650

description: Im Februar 1998 wurden die Ergebnisse der Delphi `98-Studie, einer Umfrage zur globalen Entwicklung von Wissenschaft und Technik, veröffentlicht. Ein Themenfeld ist explizit der Informations- und Kommunikationstechnik und ihren Anwendungen gewidmet, wobei letztere aber auch in andere Fragebögen wie "Dienstleistungen und Konsum" Eingang gefunden haben. Der zweimaligen Befragung haben sich schließlich über 1.800 Forschungs- und Entwicklungs-Experten aus Unternehmen und Hochschulen unterzogen. Die Auswertung der Delphi `98-Umfrage hinsichtlich der Thematik multimedialer Kommunikationssysteme hat zum einen ergeben, dass es sich hierbei um eine Querschnittsthematik handelt, die in viele (Anwendungs) Bereiche anderer Technologiefelder hineinreicht. Zum anderen haben die Ergebnisse die hohe Relevanz vor allem für unsere wirtschaftliche und gesellschaftliche Entwicklung deutlich gemacht. Aufgrund der Defizite Deutschlands im internationalen Technologiewettbewerb ist der Handlungsbedarf hinsichtlich privater und staatlicher Strategien insbesondere zur Verstärkung der internationalen Kooperation sehr hoch.
description: In February 1998 the results of the Delphi 98 study, a survey about the global developments of science and technology were published. One area is explicitly devoted to information and communication technologies and their applications, whereby the latter can also be found in other questionnaires like "Service and Consumption". Finally, over 1.800 R&D experts from industry and universities participated in the two rounds of the survey. The analysis of the survey concerning multimedia communication systems made obvious that they have a crosscutting impact on many applications of other technology fields. Furthermore their high importance for our economic and social development are supported by the results. Because of the German weaknesses in the international technological competition the need to develop provate and public strategies especially concerning international cooperation is very high.
description: Arbeit
Walter R. Heinz, hermann Kotthoff, Gerd Peter (Hg.): Soziale Räume, global players, lokale Ökonomien - Auf dem Weg in die innovative Tätigkeitsgesellschaft? Dortmunder Beiträge zur Sozial- und Gesellschaftspolitik, Bd. 29, LIT-Verlag, Münster, 2000, ISBN 3-8258-4754-3, 162 S., Euro 20.90
Creators: name: Jonas, Michael
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2003
Subjects: subject: 300
subject: 650

description: Arbeit
Non-reciprocal few-photon devices based on chiral waveguide-emitter couplings
Creators: name: Gonzalez-Ballestero, C.
name: Moreno, Esteban
name: Garcia-Vidal, F. J.
name: Gonzalez-Tudela, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate the possibility of designing efficient, non reciprocal few-photon devices by exploiting the chiral coupling between two waveguide modes and a single quantum emitter. We show how this system can induce non-reciprocal photon transport at the single-photon level and act as an optical diode. Afterwards, we also show how the same system shows a transistor-like behaviour for a two-photon input. The efficiency in both cases is shown to be large for feasible experimental implementations. Our results illustrate the potential of chiral waveguide-emitter couplings for applications in quantum circuitry.
description: Mathematica notebook attached for calculation of detection probabilities
Towards Layer-Selective Quantum Spin Hall Channels in Weak Topological Insulator Bi4Br2I2
Creators: name: Zhong, Jingyuan
name: Yang, Ming
name: Shi, Zhijian
name: Li, Yaqi
name: Mu, Dan
name: Liu, Yundan
name: Cheng, Ningyan
name: Zhao, Wenxuan
name: Hao, Weichang
name: Wang, Jianfeng
name: Yang, Lexian
name: Zhuang, Jincheng
name: Du, Yi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Weak topological insulators, constructed by stacking quantum spin Hall insulators with weak interlayer coupling, offer promising quantum electronic applications through topologically nontrivial edge channels. However, the currently available weak topological insulators are stacks of the same quantum spin Hall layer with translational symmetry in the out-of-plane direction, leading to the absence of the channel degree of freedom for edge states. Here, we study a candidate weak topological insulator, Bi4Br2I2, which is alternately stacked by three different quantum spin Hall insulators, each with tunable topologically non-trivial edge states. Our angle-resolved photoemission spectroscopy and first-principles calculations show that an energy gap opens at the crossing points of different Dirac cones correlated with different layers due to the interlayer interaction. This is essential to achieve the tunability of topological edge states as controlled by varying the chemical potential. Our work offers a perspective for the construction of tunable quantized conductance devices for future spintronic applications.
Assessing Recruitment, Selection, Training and Development practice and challenges: The case of SNNPR, Hadiya Zone Duna District
Creators: name: Daniel, Beyen
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: In Ethiopia, depending on the government's ideology the country's policies and strategies are executed. From early times up to now different governments with different policies, rules and regulations came in to power. For instance, the Derg regime (1974-1991) had its own socialist idea with a centralized policy system. Consequently, designing of policies and decision making took place in a centralized system. In addition to this, all the civil service organizations were highly centralized. This research attempts to assess the practices of human resource management in SNNPRG using questioner collected from selected public sector bureaus of Duna Woreda and secondary data of official documents. The findings reveal that their good performance of selection, recruitment and training management compared in some sectors but still there is problems facing the practice better. However recruitment and selection faced the challenges such as; it is not merit based, using inappropriate selection channels, absence of attractive salary scale, and the current regional civil servants recruitment procedure is not always allow bureaus to recruit the right candidate for the right position. Regarding, the training and development the bureaus are facing problems such as; Training and development is not based on the need assessment (Improper need assessment), not frequently given, it is given only for small number of days and no equal access to get training
Sensor-based Gait Parameter Extraction with Deep Convolutional Neural Networks
Creators: name: Hannink, Julius
name: Kautz, Thomas
name: Pasluosta, Cristian F.
name: Gaßmann, Karl-Günter
name: Klucken, Jochen
name: Eskofier, Bjoern M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Measurement of stride-related, biomechanical parameters is the common rationale for objective gait impairment scoring. State-of-the-art double integration approaches to extract these parameters from inertial sensor data are, however, limited in their clinical applicability due to the underlying assumptions. To overcome this, we present a method to translate the abstract information provided by wearable sensors to context-related expert features based on deep convolutional neural networks. Regarding mobile gait analysis, this enables integration-free and data-driven extraction of a set of 8 spatio-temporal stride parameters. To this end, two modelling approaches are compared: A combined network estimating all parameters of interest and an ensemble approach that spawns less complex networks for each parameter individually. The ensemble approach is outperforming the combined modelling in the current application. On a clinically relevant and publicly available benchmark dataset, we estimate stride length, width and medio-lateral change in foot angle up to ${-0.15\pm6.09}$ cm, ${-0.09\pm4.22}$ cm and ${0.13 \pm 3.78^\circ}$ respectively. Stride, swing and stance time as well as heel and toe contact times are estimated up to ${\pm 0.07}$, ${\pm0.05}$, ${\pm 0.07}$, ${\pm0.07}$ and ${\pm0.12}$ s respectively. This is comparable to and in parts outperforming or defining state-of-the-art. Our results further indicate that the proposed change in methodology could substitute assumption-driven double-integration methods and enable mobile assessment of spatio-temporal stride parameters in clinically critical situations as e.g. in the case of spastic gait impairments.
description: in IEEE Journal of Biomedical and Health Informatics (2016)
title: Amtsschimmel auf der Datenautobahn
title: Kommt mit Multimedia und Internet auch die "Online-Verwaltung"?
titleType: AlternativeTitle
title: Officialism on the data highway - Will multimedia and the internet also trigger "online administration"?
titleType: AlternativeTitle
Creators: name: Wind, Martin
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: digital signatures
subject: electronic government
subject: new public management
subject: virtual administration
subject: 300
subject: 650

description: Die behördliche Nutzung der Informations und Kommunikationstechnik ist seit jeher eng mit Erwartungen an Reformen in der öffentlichen Verwaltung verbunden. Der Beitrag konfrontiert Konzepte zur "vorverlagerten Stadtverwaltung" und zur "virtuellen Verwaltung" mit der aktuellen Situation öffentlicher Verwaltungen. Im Ergebnis wird festgestellt, dass beim verwaltungsinternen Technikeinsatz weiterhin große Defizite bestehen, sich dessen ungeachtet Kommunalverwaltungen aber bei regionalen Online-Projekten als Moderatoren und Promotoren betätigen müssen.
description: The use of information and communication technology in public administrations is connected with expectations about administrative reorganisation and modernisation. The following contribution confronts technical blueprints with the current situation of public administrations. Despite existing deficits in the administrative use of technical applications, municipalities especially have to act as "mediator" between different actors in regional online-projects to promote the development of mutually used technical systems.
description: Arbeit
Passive control of a falling sphere by elliptic-shaped appendages
Creators: name: Lācis, Uǧis
name: Olivieri, Stefano
name: Mazzino, Andrea
name: Bagheri, Shervin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The majority of investigations characterizing the motion of single or multiple particles in fluid flows consider canonical body shapes, such as spheres, cylinders, discs, etc. However, protrusions on bodies -- being either as surface imperfections or appendages that serve a function -- are ubiquitous in both nature and applications. In this work, we characterize how the dynamics of a sphere with an axis-symmetric wake is modified in the presence of thin three-dimensional elliptic-shaped protrusions. By investigating a wide range of three-dimensional appendages with different aspect ratios and lengths, we clearly show that the sphere with an appendage may robustly undergo an inverted-pendulum-like (IPL) instability. This means that the position of the appendage placed behind the sphere and aligned with the free-stream direction is unstable, in a similar way that an inverted pendulum is unstable under gravity. Due to this instability, non-trivial forces are generated on the body, leading to turn and drift, if the body is free to fall under gravity. Moreover, we identify the aspect ratio and length of the appendage that induces the largest side force on the sphere, and therefore also the largest drift for a freely falling body. Finally, we explain the physical mechanisms behind these observations in the context of the IPL instability, i.e., the balance between surface area of the appendage exposed to reversed flow in the wake and the surface area of the appendage exposed to fast free-stream flow.
description: 16 pages, 13 figures, 2 tables, under consideration for publication in Phys. Rev. Fluids; revision
Equivalence of several descriptions for 6d SCFT
Creators: name: Hayashi, Hirotaka
name: Kim, Sung-Soo
name: Lee, Kimyeong
name: Yagi, Futoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the three different looking BPS partition functions, namely the elliptic genus of the 6d $\mathcal{N}=(1,0)$ $Sp(1)$ gauge theory with $10$ flavors and a tensor multiplet, the Nekrasov partition function of the 5d $\mathcal{N}=1$ $Sp(2)$ gauge theory with $10$ flavors, and the Nekrasov partition function of the 5d $\mathcal{N}=1$ $SU(3)$ gauge theory with $10$ flavors, are all equal to each other under specific maps among gauge theory parameters. This result strongly suggests that the three gauge theories have an identical UV fixed point. Type IIB 5-brane web diagrams play an essential role to compute the $SU(3)$ Nekrasov partition function as well as establishing the maps.
description: v1: 40 pages, 13 figures, v2: published version
title: Virtuelle Unternehmen in der Medienwirtschaft
title: Ein praxisnahes Modell für KMU-Kooperationen
titleType: AlternativeTitle
title: Virtual companies in the media industry - Practical model for SME
titleType: AlternativeTitle
Creators: name: Treichel, Heinz-Reiner
name: Ciesinger, Kurt-Georg
Publisher: name: Westdeutscher Verlag
Year: 1999
Subjects: subject: co-operation
subject: evolutionary company development processes
subject: media industry
subject: SME-networks
subject: virtual companies
subject: 300
subject: 650

description: Die Medienindustrie nimmt aufgrund ihres hohen Vorbereitungsgrades in der Nutzung und Produktion neuer Medien eine Vorreiterrolle auch bei der Bildung virtueller Verbünde ein. Ein hochinnovatives kooperatives Unternehmensnetzwerk wurde von den Autoren über mehrere Jahre begleitet. Es zeigte sich, dass die erfolgreiche Etablierung virtueller Unternehmen in mittelständischen Strukturen - anders als dies in der Literatur diskutiert wird - kein Ergebnis deduktiv-planerischer Prozesse ist, sondern auf evolutionären Wachstumsprozessen basiert. Unternehmensverbünde sind für KMU-Branchen ein zukunftsweisender Weg in globale Medienmärkte, der jedoch dann scheitern muss, wenn die Steuerungs- und Planungsgewohnheiten der KMU-Akteure als Marginalfehler" normativer Entscheidungsmodelle betrachtet werden. Werden hingegen KMU-spezifische Verhaltenskriterien wie Autonomiestreben und marktwirtschaftliches Misstrauen als Fixpunkte der Planung virtueller Verbünde gesetzt und darauf aufbauend Strukturen geschaffen, die Konzeptflexibilität, Freiwilligkeit und Dynamik integrieren, so können auch KMU-Verbünde auf hohem Niveau stabilisiert werden.
description: The media industry is using as well as producing new media technologies on a very high level. Therefore this branch should be better prepared in order to build virtual companies compared to other SME-industries. In the last three years the authors have been involved in the process of establishing such a virtual network of more than a dozen small and medium-sized companies. It showed that the process of building virtual production structures is not the result of top-down planning (as discussed in common literature) but of evolutionary processes based on trial and error. Nevertheless networks can be a very mighty way to enter the future markets for new media products and services. But this way can only be sucessful, if the attitudes, behavior dispositions and decision making habits of the management in SMEs are not seen as an error or defect caused by the person which disturbs a rational decision. The process of planning virtual organizations has to accept these habits as specific and not to be overcome criteria of SME-decision making. Concepts for the establishment of virtual networks must therefore be held extremely flexible and dynamic and must be based on volition of every person and company involved in any step of the process.
description: Arbeit
Newforms of half-integral weight: the minus space counterpart
Creators: name: Baruch, Ehud Moshe
name: Purkait, Soma
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F37, 11F12, 11F70

description: We define a subspace of the space of holomorphic modular forms of weight $k+1/2$ and level $4M$ where $M$ is odd and square-free. We show that this subspace is isomorphic under the Shimura-Niwa correspondence to the space of newforms of weight $2k$ and level $2M$ and that this is a Hecke isomorphism. The space we define is a proper subspace of the orthogonal complement of the Kohnen plus space if the Kohnen plus space is nonzero.
The Implicitness Constructed and Translated in Diplomatic Discourse: a perspective from grammatical metaphor
Creators: name: Junfeng Zhang
Publisher: name: IATIS and the Centre for Translation and Textual Studies (CTTS) at Dublin City University
Year: 2013
Subjects: air collision
diplomatic discourse
grammatical metaphor
human element
implicitness
interpersonal prominence
SOM
translation

description: New Voices in Translation Studies, 10, 1, -
Assessment of the Potential and Challenges of Agribusiness Marketing in Ethiopia: the case of Fruits and Vegetables Marketing in the Addis Ababa Region, Focusing on ET-FRUIT
Creators: name: W/Mariam, Tesfanesh
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The fruit and vegetable market has been one of the fastest growing of all agricultural markets. this time, Ethiopia agricultural marketing system is often accused in the popular press of being inefficient and unproductive. As poor infrastructure, inefficient marketing systems because of that reduce demand from consumers, who face significant challenges in seizing opportunities to participate in growing markets for high value, nutritious crops like fruits and vegetables. Marketing constraints include both high costs and risk. In line with this, the main objective of the study was to assess the challenges and potential of agribusiness in Ethiopia in case fruits and vegetables marketing in company of Et-fruit in Addis Ababa region, with specific objectives to assess the challenges and potential of fruits and vegetable and assess the benefits prevailing in operating fruits and vegetables market in case fruits and vegetables marketing share company. This study was focus on Et- fruit company managers, employee, wholesalers and retailer in Addis Ababa region. The Instrument planned to be used in this research for primary data collection was the survey structured questionnaires and secondary data was collected from the publications by employing both qualitative and quantitative data. A self –administered questionnaire has been distributed to 16 purposive selected samples and to 170 randomly selected samples totally to 186 samples analysis was made based on the data collected. The questionnaires were analyzed using descriptive statistics with the support of statistical software program that has Statistical Package for Social Science (SPSS version 22) for analyses and summarization purposes. Results were discussed and analyzed by employing, tables, mean, std. deviation, graphs and qualitatively depending on the type of data manually interpret. The findings based on, major critical challenges of Fruits and Vegetable marketing responded by managers and employee, finding responded by wholesaler and retailer on challenges of fruits and vegetables market, democratic background and Discussion based on secondary data on potential and challenges of fruits and vegetables marketing and the importance of establishment of the company focus on literature review. The paper concludes on major critical challenge, potential, improving performance and the advantage from the establishment of the company fruits and vegetables marketing. Finally, the researcher recommended company Partnering with other entities that are well placed both to deliver market services to market users and customers, and also sharing experiences and best practices with other stakeholders and other company and it should be transparent information on price and develop the skill of employee by giving short term and long term training. Key Words: fruits, vegetables, marketing, potential, challenge
Pointwise Gradient Bounds for Degenerate Semigroups (of UFG type)
Creators: name: Crisan, Dan
name: Ottobre, Michela
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we consider diffusion semigroups generated by second order differential operators of degenerate type. The operators that we consider do not, in general, satisfy the Hormander condition and are not hypoelliptic. In particular, instead of working under the Hormander paradigm, we consider the so-called UFG condition, introduced by Kusuoka and Strook in the eighties. The UFG condition is weaker than the uniform Hormander condition, the smoothing effect taking place only in certain directions (rather than in every direction, as it is the case when the Hormander condition is assumed). Under the UFG condition, Kusuoka and Strook deduced sharp small time asymptotic bounds for the derivatives of the semigroup in the directions where smoothing occurs. In this paper, we study the large time asymptotics for the gradients of the diffusion semigroup in the same set of directions and under the same UFG condition. In particular, we identify conditions under which the derivatives of the diffusion semigroup in the smoothing directions decay exponentially in time. This paper constitutes therefore a stepping stone in the analysis of the long time behaviour of diffusions which do not satisfy the Hormander condition.
description: 23 pages
Size Dependence of Oxygen-annealing Effects on Superconductivity of Fe{1+y}Te{1-x}S{x}
Creators: name: Yamazaki, Teruo
name: Sakurai, Tatsuya
name: Yaguchi, Hiroshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: For the Fe-based superconductor Fe{1+y}Te{1-x}S{x}, superconductivity is induced by annealing treatment in oxygen atmosphere, whereas as-grown samples do not show superconductivity. We have investigated the sample-size dependence of O2-annealing effects in Fe1.01Te0.91S0.09. The annealing conditions are fixed to be 1 atm, 200 C, and 2 hours. We have carried out magnetic susceptibility and specific heat measurements in order to evaluate the superconducting volume fraction. We have found that Fe{1+y}Te{1-x}S{x} has an optimal size for the induction of bulk superconductivity by O2 annealing. Our results indicate that O2 annealing is probably effective near the surface of samples over a length of a few tens of micro meters.
description: accepted for publication in J. Phys. Soc. Jpn
Zooming into local active galactic nuclei: The power of combining SDSS-IV MaNGA with higher resolution integral field unit observations
Creators: name: Wylezalek, Dominika
name: Müller, Allan Schnorr
name: Zakamska, Nadia L.
name: Storchi-Bergmann, Thaisa
name: Greene, Jenny E.
name: Müller-Sánchez, Francisco
name: Kelly, Michael
name: Liu, Guilin
name: Law, David R.
name: Barrera-Ballesteros, Jorge K.
name: Riffel, Rogemar A.
name: Thomas, Daniel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Ionised gas outflows driven by active galactic nuclei (AGN) are ubiquitous in high luminosity AGN with outflow speeds apparently correlated with the total bolometric luminosity of the AGN. This empirical relation and theoretical work suggest that in the range L_bol ~ 10^43-45 erg/s there must exist a threshold luminosity above which the AGN becomes powerful enough to launch winds that will be able to escape the galaxy potential. In this paper, we present pilot observations of two AGN in this transitional range that were taken with the Gemini North Multi-Object Spectrograph Integral Field Unit (IFU). Both sources have also previously been observed within the Sloan Digital Sky Survey-IV (SDSS) Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. While the MaNGA IFU maps probe the gas fields on galaxy-wide scales and show that some regions are dominated by AGN ionization, the new Gemini IFU data zoom into the centre with four times better spatial resolution. In the object with the lower L_bol we find evidence of a young or stalled biconical AGN-driven outflow where none was obvious at the MaNGA resolution. In the object with the higher L_bol we trace the large-scale biconical outflow into the nuclear region and connect the outflow from small to large scales. These observations suggest that AGN luminosity and galaxy potential are crucial in shaping wind launching and propagation in low-luminosity AGN. The transition from small and young outflows to galaxy-wide feedback can only be understood by combining large-scale IFU data that trace the galaxy velocity field with higher resolution, small scale IFU maps.
description: 14 pages, accepted for publication in MNRAS
Factors Affecting Consumers Preference and Decision Making of Furniture Brand in some Selected Furniture PLC
Creators: name: Eshetu, Tsige
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The main objective of this study was to investigate furniture consumers, brand preference and decision making comparing Finfine Furniture Factory (3F), Deluxe and Wanza with locally assembled furniture factory brands. In order to find out the brand preference of consumers and decision making, the study considered four factors namely social, personal, and psychological and brand attributes. To assess the factors influence, a sample size of 250 was selected using convenience sampling technique. Based on the theoretical frame work and objectives of the study 22 items were provided in a 5 point Likert scale to the respondents. The gathered data was analyzed by descriptive analysis. The analysis revealed that personal, social, psychological and brand were the major factors influence for a furniture purchasing decision among the consumers. In addition, friends or family and the neighbors' were the major sources of information from where consumers get to know new furniture brands. Finally, consumer behavior attribute were more influential in consumers brand preference than brand attribute dimensions. In general, 3F, Deluxe and Wanza manufactures and local furniture companies should focus on building their social, personal and psychological equity.
The Role of Government Support Services for the performance of Small and Medium Manufacturing Enterprises in Addis Ababa City
Creators: name: Mariamawit, F/selassie
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Review of literature indicates that, the role of government support services for Micro, Small and Medium Enterprises and major implementation challenges are not yet fully understood and evaluated in the Ethiopian context. Therefore, this study investigates the role of Government Support Services for the performance of Small and Medium Manufacturing Enterprises(SMMEs) in Bole and Yeka sub-cities of Addis Ababa City Administration and the major implementation challenges encountered during implementation process. A total of 120 questionnaires were distributed for Small and Medium Manufacturing Enterprise operators. In addition, interviews for concerned government officials and operators, document review and observations of SMMEs were also part of the data collection instrument. The collected data were analyzed by qualitative methods and quantitative methods. Qualitative data were analyzed using qualitative data analysis and document review. Quantitative data were analyzed by using descriptive statistics.Based on the findings of the study, the major support services can be broadly divided into five aspects, which are: credit service; consultancy and training service; market linkage support; provision of working premise and one stop shop services. These support services are found to be significant for the performance of SMMEs in terms of their productivity and profitability and the major challenges encountered during the implementation of support services are inaccessibility of support services, lack of infrastructure, lack of good governance, corruption, overbearing regulatory and operational environments and lack of institutional coordination.To tackle the above challenges some options are recommended to policy makers and for concerned government bodies. These include improving the accessibility of support services for enterprises, provision of sufficient infrastructure, taking the appropriate administrative measures on corrupted officials, enhancing the cooperation of concerned government institutions.
H0LiCOW V. New COSMOGRAIL time delays of HE0435-1223: $H_0$ to 3.8% precision from strong lensing in a flat $Λ$CDM model
Creators: name: Bonvin, V.
name: Courbin, F.
name: Suyu, S. H.
name: Marshall, P. J.
name: Rusu, C. E.
name: Sluse, D.
name: Tewes, M.
name: Wong, K. C.
name: Collett, T.
name: Fassnacht, C. D.
name: Treu, T.
name: Auger, M. W.
name: Hilbert, S.
name: Koopmans, L. V. E.
name: Meylan, G.
name: Rumbaugh, N.
name: Sonnenfeld, A.
name: Spiniello, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: J.2
subject: 85A40

description: We present a new measurement of the Hubble Constant H0 and other cosmological parameters based on the joint analysis of three multiply-imaged quasar systems with measured gravitational time delays. First, we measure the time delay of HE0435-1223 from 13-year light curves obtained as part of the COSMOGRAIL project. Companion papers detail the modeling of the main deflectors and line of sight effects, and how these data are combined to determine the time-delay distance of HE 0435-1223. Crucially, the measurements are carried out blindly with respect to cosmological parameters in order to avoid confirmation bias. We then combine the time-delay distance of HE0435-1223 with previous measurements from systems B1608+656 and RXJ1131-1231 to create a Time Delay Strong Lensing probe (TDSL). In flat $Λ$CDM with free matter and energy density, we find $H_0$ = 71.9 +2.4 -3.0 km/s/Mpc and $Ω_Λ$ = 0.62 +0.24 -0.35 . This measurement is completely independent of, and in agreement with, the local distance ladder measurements of H0. We explore more general cosmological models combining TDSL with other probes, illustrating its power to break degeneracies inherent to other methods. The TDSL and Planck joint constraints are $H_0$ = 69.2 +1.4 -2.2 km/s/Mpc, $Ω_Λ$ = 0.70 +0.01 -0.01 and $Ω_k$ = 0.003 +0.004 -0.006 in open $Λ$CDM and $H_0$ = 79.0 +4.4 -4.2 km/s/Mpc, $Ω_{de}$ = 0.77 +0.02 -0.03 and $w$ = -1.38 +0.14 -0.16 in flat $w$CDM. Combined with Planck and Baryon Acoustic Oscillation data, when relaxing the constraints on the numbers of relativistic species we find $N_{eff}$ = 3.34 +0.21 -0.21 and when relaxing the total mass of neutrinos we find 0.182 eV. In an open $w$CDM in combination with Planck and CMB lensing we find $H_0$ = 77.9 +5.0 -4.2 km/s/Mpc, $Ω_{de}$ = 0.77 +0.03 -0.03, $Ω_k$ = -0.003 +0.004 -0.004 and $w$ = -1.37 +0.18 -0.23.
description: 19 pages, 7 figures, 4 tables. Accepted for publication in MNRAS. Light curves and simulated data can be downloaded at http://www.h0licow.org
Two-dimensional electron gas in the regime of strong light-matter coupling: Dynamical conductivity and all-optical measurements of Rashba and Dresselhaus coupling
Creators: name: Yudin, Dmitry
name: Shelykh, Ivan A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A nonperturbative interaction of an electronic system with a laser field can substantially modify its physical properties. In particular, in two-dimensional (2D) materials with a lack of inversion symmetry, the achievement of a regime of strong light-matter coupling allows direct optical tuning of the strength of the Rashba spin-orbit interaction (SOI). Capitalizing on these results, we build a theory of the dynamical conductivity of a 2D electron gas with both Rashba and Dresselhaus SOIs coupled to an off-resonant high-frequency electromagnetic wave. We argue that strong light-matter coupling modifies qualitatively the dispersion of the electrons and can be used as a powerful tool to probe and manipulate the coupling strengths and adjust the frequency range where optical conductivity is essentially nonzero.
description: 5 pages, 5 figures, Supplementary
Shortcomings of New Parametrizations of Inflation
Creators: name: Martin, Jerome
name: Ringeval, Christophe
name: Vennin, Vincent
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the hope of avoiding model dependence of the cosmological observables, phenomenological parametrizations of Cosmic Inflation have recently been proposed. Typically, they are expressed in terms of two parameters associated with an expansion of the inflationary quantities matching the belief that inflation is characterized by two numbers only, the tensor-to-scalar ratio and the scalar spectral index. We give different arguments and examples showing that these new approaches are either not generic or insufficient to make predictions at the accuracy level needed by the cosmological data. We conclude that disconnecting inflation from high energy physics and gravity might not be the most promising way to learn about the physics of the early Universe.
description: 13 pages, 2 figures, uses RevTeX. References added, matches published version
When do Correlations Increase with Firing Rate?
Creators: name: Barreiro, Andrea K.
name: Ly, Cheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: A central question in neuroscience is to understand how noisy firing patterns are used to transmit information. Because neural spiking is noisy, spiking patterns are often quantified via pairwise correlations, or the probability that two cells will spike coincidentally, above and beyond their baseline firing rate. One observation frequently made in experiments, is that correlations can increase systematically with firing rate. Theoretical studies have determined that stimulus-dependent correlations that increase with firing rate can have beneficial effects on information coding; however, we still have an incomplete understanding of what circuit mechanisms do, or do not, produce this correlation-firing rate relationship. Here, we study the relationship between pairwise correlations and firing rates in recurrently coupled excitatory-inhibitory spiking networks with conductance-based synapses. We found that with stronger excitatory coupling, a positive relationship emerges between pairwise correlations and firing rates. To explain these findings, we used linear response theory to predict the full correlation matrix and to decompose correlations in terms of graph motifs. We then used this decomposition to explain why covariation of correlations with firing rate -- a relationship previously explained in feedforward networks driven by correlated input -- emerges in some recurrent networks but not in others. Furthermore, when correlations covary with firing rate, this relationship is reflected in low-rank structure in the correlation matrix.
description: Previous title: "Low-Rank Correlations in Heterogeneous Neural Circuits"
On the IceCube Result on $\barν_μ \to \barν_{s}$ Oscillations
Creators: name: Petcov, S. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We elucidate the mechanism of enhancement of the $\barν_μ \to \barν_{s}$ transitions at small mixing angles of Earth-core-crossing neutrinos, which is at the basis of the recent result of the IceCube experiment on atmospheric muon anti-neutrino oscillations into sterile anti-neutrino.
description: 10 pages, 4 figures
Free-energy functional of the Debye-Hückel model of simple fluids
Creators: name: Piron, R.
name: Blenski, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The Debye-Hückel approximation to the free-energy of a simple fluid is written as a functional of the pair correlation function. This functional can be seen as the Debye-Hückel equivalent to the functional derived in the hyper-netted chain framework by Morita and Hiroike, as well as by Lado. It allows one to obtain the Debye-Hückel integral equation through a minimization with respect to the pair correlation function, leads to the correct form of the internal energy, and fulfills the virial theorem.