cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analysis of International Procurement Practices and Challenges: the Case of Addis Ababa University
Creators: name: Tsegaye, Asfaw
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: In light of the principles of procurement, the objective of this research is to investigate the performance of international procurement practice in the case of Addis Ababa University. Procurement Directorate, its Users, suppliers and supporting stakeholders are evaluated based on their performance in accordance to related practices in international procurement. To gather information open and close ended questionnaires were prepared and distributed to purposefully selected respondents from procurement and related offices staff of the AAU including judgmentally selected requesting Unit managers. Further, semi- structured interview was conducted with each selected staff and top level and experienced Procurement managers. In addition secondary sources also have helped the data collection. Methodologically, this study was designed to be descriptive. The major findings of the study indicates that the international procurement practice is not well performed by End users, Procurement staffs, suppliers and stakeholders of AAU Procurement who are participating directly or indirectly in the international procurement of the University. The researcher recommended to the Management of AAU and specially the procurement directorate to create opportunities for appropriate training, establish organized marketing research department, introduce E-procurement and automated data base systems, to create long term strategic supplier relationship for strategic items through establishing a suppliers list registration system , create win-win and smooth relationship with suppliers, to create good relationship and awareness among AAU Procurement, End Users, suppliers and the stakeholders using awareness creation events, and to develop conducive organizational structure in the End Users departments. Key Word; International Procurement
Investigation of Accuracy and Certainty of Angle of Incidence Measurements of PV Modules
Creators: name: Sanchez Castro, P.
name: Weber, T.
name: Murkar, M.
name: Lippke, B.
name: Grunow, P.
name: Xuereb, S.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 763-766
description: The aim of this work is to focus on the angle of incidence (AOI) which is described by its angular response curve or incident angle modifier (IAM). AOI measurements are one of the most disregarded problems both during procurement and Energy Yield Assessment (EYA). Hence, this investigation tries to shed some light regarding the ultimate impact of unrealistic angle-modifier curves on the economics of a PV plant by performing the energy yield assessment at different climatic profiles while considering AOI measurements reported by different laboratories. The results showed that unrealistic AOI values could lead to a 4 to 5 % deviation in annual energy yield and most prominently in climatic profiles of higher diffuse light for high angles of incidence, such as Dublin, Hamburg, and Groningen, with 58 %, 55 %, and 56 % Horizontal Diffuse Irradiation (HDI) to Global Horizontal Irradiance (GHI) ratio, respectively. We shed light on the related uncertainties during the IAM determination. Furthermore, we suggest that transmission values higher than 100 % and higher than 70 % shall be secured by the manufacturers’ warranty.
First-passage time to clear the way for receptor-ligand binding in a crowded environment
Creators: name: Newby, Jay
name: Allard, Jun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: Certain biological reactions, such as receptor-ligand binding at cell-cell interfaces and macromolecules binding to biopolymers, require many smaller molecules crowding a reaction site to be cleared. Examples include the T cell interface, a key player in immunological information processing. Diffusion sets a limit for such cavitation to occur spontaneously, thereby defining a timescale below which active mechanisms must take over. We consider $N$ independent diffusing particles in a closed domain, containing a sub-region with $N_{0}$ particles, on average. We investigate the time until the sub-region is empty, allowing a subsequent reaction to proceed. The first passage time is computed using an efficient exact simulation algorithm and an asymptotic approximation in the limit that cavitation is rare. In this limit, we find that the mean first passage time is sub-exponential, $T \propto e^{N_{0}}/N_{0}^2$. For the case of T cell receptors, we find that stochastic cavitation is exceedingly slow, $10^9$ seconds at physiological densities, however can be accelerated to occur within 5 second with only a four-fold dilution.
Improved Shadow Filtering and Change-Point Detection Methods to Extract Soiling Loss from PV-Scada Data
Creators: name: De, S.
name: Fuke, P.
name: Shiradkar, N.
name: Kottantharayil, A.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 767-771
description: Soiling of solar panels is becoming a serious issue worldwide. To address this, an important step is to analyze PV-SCADA data so as to extract soiling losses. Previously two models, Fixed Rate Precipitation (FRP) and Stochastic Rate and Recovery (SRR), have been used to extract soiling losses in terms of soiling rates. These models use an irradiance filter and/or a time filter to eliminate data points influenced by shading and angle of incidence effects to calculate a daily Performance Index (PI)/Ratio (PR). However, shadow may be cast during the mentioned timeperiod on the PV panels or on the irradiance sensor. This work proposes two new filtering techniques to eliminate shadows cast on PV panels, which would result in estimation of true daily PR. Moreover, FRP and SRR assume the soiling deposition rate to be constant between two cleaning events which may not be the case always. The site under study may have changes in climatic conditions due to which the soiling rate may change. Detection of change in the soiling rate would improve soiling rate estimates. Hence, the work also proposes a new algorithm to identify the Change Point(s) (CP) accurately to estimate the true soiling rate.
Influence of Environmental Parameters on Soiling Deposition for PV Modules
Creators: name: Costa, S.C.
name: Cassini, D.A.
name: Camatta Santana, V.
name: Kazmerski, L.
name: Alves Cardoso Diniz, A.S.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 753-756
description: The soiling of PV modules can have a significant impact on the performance of these solar devices. Soiling losses can be analyzed calculating the soiling ratio (SRatio), the relationship between electrical parameters measured from clean and soiled PV-modules under the same standard operating conditions. But the losses can also be influenced by considering the soiling-layer properties as affected by the specific meteorological conditions. The objective of this paper is to report the effects of soiling deposition for the case study of crystalline-Si PV modules installed in Equitorial climate of Belo Horizonte, Brazil (latitude -19.92°, longitude - 43.99°), and to investigate the correlation of the soiling deposition processes with meteorological variables. The results demonstrate that soiling losses are directly proportional to the state of the deposited particulate matter (density, uniformity), But local climate conditions of higher wind speed combined with low-relative humidity can have a significant, inverse effect, increasing the calculated SRatio and reducing the measured soiling losses.
Chiral current generation in QED by longitudinal photons
Creators: name: Avalo, J. L. Acosta
name: Rojas, H. Perez
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report the generation of a pseudovector electric current having imbalanced chirality in an electron-positron strongly magnetized gas in QED. It propagates along the external applied magnetic field B as a chiral magnetic effect in QED. It is triggered by a perturbative electric field parallel to B, associated to a pseudovector longitudinal mode propagating along B. An electromagnetic chemical potential was introduced, but our results remain valid even for vanishing chemical potential. A nonzero fermion mass was assumed, which is usually considered vanishing in the literature. In the quantum field theory formalism at finite temperature and density, an anomaly relation for the axial current was found for a medium of massive fermions. It bears some analogy to the Adler-Bell-Jackiw anomaly. From the expression for the chiral current in terms of the photon self-energy tensor in a medium, it is obtained that electrons and positrons scattered by longitudinal photons (inside the light cone) contribute to the chiral current, as well as the pair creation due to longitudinal photons (out of light cone). In the static limit, an electric pseudovector current is obtained in the lowest Landau level
description: arXiv admin note: text overlap with arXiv:1502.07589
The effect of Corporate Governance Practices on the Financial Performance of Public Enterprises in Ethiopia
Creators: name: Abel, Hailegiorgies
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The role of corporate governance in public enterprises differs from that of the private counterparts for the principal-agent problem in this enterprises is more complicated. In this study the effects of corporate governance practices specifically board size, board composition, board gender diversity and debt policy are investigated in the Ethiopian public enterprises context. The main objective of the study is to explore the theoretical and practical aspects of public enterprises, corporate governance, and their interrelationship in the Ethiopian context. The study employed explanatory research design with an econometric panel data of 10 Pubic enterprises that covers the period 2012 to 2017. Both correlation analysis and fixed effects regression model is adopted after conducting the necessary tests. Board size, board composition and board gender diversity are found to have insignificant relationship with financial performance whereas Debt policy has negative and significant effect on the performance of public enterprises in Ethiopia. The control variable firm size has significant and negative relationship with financial performance while liquidity has no relationship with financial performance. The findings suggest that public enterprises in Ethiopia may improve their financial performance depending on the measures being used.
Synchronization via interacting reinforcement
Creators: name: Pra, Paolo Dai
name: Louis, Pierre-Yves
name: Minelli, Ida G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60K35, 82C22, 62P25

description: We consider a system of urns of Polya-type, with balls of two colors; the reinforcement of each urn depends both on the content of the same urn and on the average content of all urns. We show that the urns synchronize almost surely, in the sense that the fraction of balls of a given color converges almost surely, as the time goes to infinity, to the same limit for all urns. A normal approximation for a large number of urns is also obtained.
Analysis of Measurement Reproducibility for Photovoltaic Modules
Creators: name: Huang, X.
name: Nan, C.
name: Lu, M.
name: Wang, H.
name: Yang, H.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 757-759
description: In this paper, a detailed study on the measurement reproducibility for photovoltaic modules was carried out. It is found that the measurement reproducibility of maximum power current, fill factor and maximum power are larger than that of short circuit current, open circuit voltage and maximum power voltage. The calculated reproducibility of maximum power is 0.147%. This means that if the 0.147% is applied for type approval of photovoltaic modules, degradation rates of modules must be less than 5.14% before and after each test sequence to make sure of passing criteria as per the IEC61215 standard. This work contributes to measurement reproducibility determination and type approval for photovoltaic modules in laboratories.
Spreading, Fingering Instability and Shrinking of a Hydrosoluble Surfactant on Water
Creators: name: Mollaei, Saeid
name: Darooneh, Amir H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report an experimental investigation of spreading then shrinking of a surfactant droplet at the air-water interface with fingering instability appearing at the edge of the droplet stain. We find out that a droplet of a surfactant on the water shows three regimes of spreading, shrinking and resting at the appropriate parameters values. These regimes can be distinguished by measuring the mean square displacement of the droplet parts, fractal dimension of stain, or radius of fingerless part of the stain (to measure it, we define the angular box-counting dimension), versus time. The shrinking regime is a novel phenomenon.
The KB paradigm and its application to interactive configuration
Creators: name: Van Hertum, Pieter
name: Dasseville, Ingmar
name: Janssens, Gerda
name: Denecker, Marc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The knowledge base paradigm aims to express domain knowledge in a rich formal language, and to use this domain knowledge as a knowledge base to solve various problems and tasks that arise in the domain by applying multiple forms of inference. As such, the paradigm applies a strict separation of concerns between information and problem solving. In this paper, we analyze the principles and feasibility of the knowledge base paradigm in the context of an important class of applications: interactive configuration problems. In interactive configuration problems, a configuration of interrelated objects under constraints is searched, where the system assists the user in reaching an intended configuration. It is widely recognized in industry that good software solutions for these problems are very difficult to develop. We investigate such problems from the perspective of the KB paradigm. We show that multiple functionalities in this domain can be achieved by applying different forms of logical inferences on a formal specification of the configuration domain. We report on a proof of concept of this approach in a real-life application with a banking company. To appear in Theory and Practice of Logic Programming (TPLP).
description: To appear in Theory and Practice of Logic Programming (TPLP)
Else Seel photograph album: Auf nach Canada! Zu August 1927
Creators: name: Seel, Else, 1894-1974
Publisher: name: University of Victoria Libraries
Year: 2021
Subjects: subject: Families
valueUri: http://id.worldcat.org/fast/1728849
subject: Friends and associates
valueUri: http://id.worldcat.org/fast/1353140
subject: Literary landmarks
valueUri: http://id.worldcat.org/fast/999933
subject: Authors, German--Homes and haunts
valueUri: http://id.worldcat.org/fast/822060
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Authors, German
valueUri: http://id.worldcat.org/fast/822051
subject: Landscapes
valueUri: http://id.worldcat.org/fast/1735625
subject: Voyages and travels
valueUri: http://id.worldcat.org/fast/1169308
subject: Travel photography
valueUri: http://id.worldcat.org/fast/1155649

description: Assembled by Else Seel from phtographs taken on a trip to Canada in 1927. Some photographs are missing or have been removed. Photographs are typical family scenes, buildings, scenic views etc.
Severity Analysis of Non-Uniform Encapsulant Discolouration in Crystalline Silicon Photovoltaic Modules Using Differential Current-Voltage Analysis Approach
Creators: name: Meena, R.
name: Kumar, M.
name: Gupta, R.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 744-747
description: Encapsulant discolouration is a prominent degradation observed in the photovoltaic (PV) module and can have uneven distribution over cells in modules. It is often accompanied by other defects and degradations (D&Ds) under external operating conditions. In this work, non-destructive and easy-to-implement analysis method called differential current-voltage analysis, has been developed to investigate encapsulant discolouration in the presence of other types of D&Ds. Herein, current-voltage curve of 20-year-old PV modules have been analyzed while partially shading the consecutive solar cells of the module. To analyze the extent of discolouration and determine the type of dominant degradation mode in the individual cell of the module, normalized percentage change in short circuit current and voltage at maximum power point have been studied in detail. The presented approach can be used for identification of encapsulant degradations in the modules under outdoor operating conditions.
Monte Carlo Approach to Consider Power Production Uncertainty due to Randomness of Module Manufacturing Process
Creators: name: Sohani, A.
name: Cornaro, C.
name: Moser, D.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 748-749
description: This study aims at finding the impact of randomness in manufacturing on the uncertainty of power production by a photovoltaic (PV) module. For this purpose, the module efficiency at the reference condition (ref) is chosen as the parameter that describes the manufacturing randomness, and using the experimental data, a statistical distribution for that is found. Then, Monte Carlo approach, as a systematic way, is utilized, and the statistical distribution for produced power of the PV module is found. A module from poly crystalline type, with the rated capacity of 120 W, is selected, and the analysis is carried out for that as the case study. The fitting based on the experimental data for 114 PV modules is demonstrated that a normal distribution with the average of 15.8% and standard deviation of 0.498% is the best statistical distribution for ref. Moreover, according to the obtained results, due to ref randomness, power production varies in the range of 97 W to 113 W. It means 16 W uncertainty in the power production, which is 13.3% of the nominal capacity.
Quantum walks public key cryptographic system
Creators: name: Vlachou, C.
name: Rodrigues, J.
name: Mateus, P.
name: Paunković, N.
name: Souto, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum Cryptography is a rapidly developing field of research that benefits from the properties of Quantum Mechanics in performing cryptographic tasks. Quantum walks are a powerful model for quantum computation and very promising for quantum information processing. In this paper, we present a quantum public-key cryptographic system based on quantum walks. In particular, in the proposed protocol the public key is given by a quantum state generated by performing a quantum walk. We show that the protocol is secure and analyze the complexity of public-key generation and encryption/decryption procedures.
Effects of the I-GENDO mHealth Intervention on Food-Related Inhibitory Control and Impulsivity in Individuals with Overweight and Obesity – A Randomized Controlled Trial
Creators: name: Seiferth, Caroline
name: Schoemann, Natalie
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Psychology
subject: FOS: Psychology
subject: Social and Behavioral Sciences
subject: Clinical Psychology
subject: Medicine and Health Sciences
subject: Health Psychology
subject: Obesity
subject: Overweight
subject: Gender
subject: mHealth
subject: Intervention
subject: Impulsivity
subject: Inhibitory Control

description: Heightened impulsiveness and deficits in food-related inhibitory control are often associated with unfavorable eating habits (i.e., overeating, emotional and external eating), which represent a maintaining factor for overweight and obesity. To achieve successful weight management, an increase in inhibitory control is required. Inhibitory control enables individuals to suppress impulsive desires to consume unhealthy foods and achieve long-term goals. Previous studies have shown that (cognitive-) behavioral training can potentially improve inhibitory control short-term, yet there is a lack of randomized-controlled trials investigating long-term effects in naturalistic settings in individuals motivated to lose weight. Therefore, our first aim is to evaluate the effectiveness of the mHealth intervention I-GENDO, which is based on cognitive-behavioral strategies and trains different aspects of food-related executive functioning in individuals with overweight or obesity. The 12-week intervention consists of seven modules training different behavior change skills such as self-regulation, emotion-regulation or self-efficacy. Individuals randomized to the experimental (n = 116) and control group (n = 97) answered the Barret Impulsiveness Scale (BIS-15) and the recently developed, 40 item self-report Food-Related Inhibitory Control Scale (FRIS) at baseline (T0), after the 12-weeks intervention phase at 3 months (T1), at 9 months (T2) and at 15 months (T3). We will use multilevel modeling (MLM) to analyze the intervention effect on these outcomes. Our second aim is to test the psychometric structure of the FRIS within this target group using Exploratory Factor Analysis (EFA). The FRIS is a recently developed 40 item self-report questionnaire which assesses different aspects of food-related inhibitory control.
Energy-Based Soiling Loss Monitoring for Solar PV Systems
Creators: name: Fuke, P.
name: De, S.
name: Shiradkar, N.
name: Kottantharayil, A.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 750-752
description: The energy loss caused by dust and other particles accumulating on photovoltaic (PV) modules has become one of the most important issues for PV system owners. A site-specific and dedicated soiling monitoring system may be necessary to optimize cleaning schedules and thus improve yearly energy yield. Commercially available electrical soiling measurement kits compare the short circuit current (ISC) or maximum power (Pmax) of clean and naturally soiled PV modules for a specific time interval and irradiation level. In this paper, we present an energy-based soiling loss monitoring approach. The ISC and Pmax based methods are benchmarked to the energy based method for soiling data collected from a test station in Mumbai. It is found that the ISC and Pmax based methods underestimate the soiling losses by about 2.5-3%.
Toric rings and ideals of stable set polytopes
Creators: name: Matsuda, Kazunori
name: Ohsugi, Hidefumi
name: Shibata, Kazuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 13P10, Secondary 52B20

description: In this paper, we discuss the normality of the toric rings of stable set polytopes, and the set of generators and Gröbner bases of toric ideals of stable set polytopes by using the results on that of edge polytopes of finite nonsimple graphs. In particular, for a graph of stability number two, we give a graph theoretical characterization of the set of generators of the toric ideal of the stable set polytope, and a criterion to check whether the toric ring of the stable set polytope is normal or not. One of the application of the results is an infinite family of stable set polytopes whose toric ideal is generated by quadratic binomials and has no quadratic Gröbner bases.
description: 12 pages
Truly trapped rainbow by utilizing nonreciprocal waveguides
Creators: name: Liu, Kexin
name: He, Sailing
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The concept of a "trapped rainbow" has generated considerable interest for optical data storage and processing. It aims to trap different frequency components of the wave packet at different positions permanently. However, all the previously proposed structures cannot truly achieve this effect, due to the difficulties in suppressing the reflection caused by strong intermodal coupling and distinguishing different frequency components simultaneously. In this article, we found a physical mechanism to achieve a truly "trapped rainbow" storage of electromagnetic wave. We utilize nonreciprocal waveguides under a tapered magnetic field to achieve this and such a trapping effect is stable even under fabrication disorders. We also observe hot spots and relatively long duration time of the trapped wave around critical positions through frequency domain and time domain simulations. The physical mechanism we found has a variety of potential applications ranging from wave harvesting and storage to nonlinearity enhancement.
description: main manuscript: 14 pages, 6 figures. supplementary information: 3 pages, 2 figures, 2 movies
Daylight Electroluminescence of PV Modules in Field Installations: When Electrical Signal Modulation is Required?
Creators: name: Dos Reis Benatto, G.A.
name: Del Prado Santamaría, R.
name: Hass, T.K.
name: Bartholomäus, M.
name: Morino, L.
name: Poulsen, P.B.
name: Spataru, S.V.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 735-739
description: With the growth of photovoltaic plant installations in quantity and size, the operations & maintenance industry calls for more efficient and accurate ways to inspect the PV modules health. To expand inspection viability, Daylight Electroluminescence (dEL) plays a big role, as EL allows accurate diagnosis of PV panels deep into the cell level. Obtaining EL images in the field during direct sunlight without covers is challenging but effective and robust using a modulated electrical signal and image processing. The thresholds required by the modulation techniques and a detailed description of how the sunlight influences the capture of the EL images are not clearly described in the research or technical literature. In this case study, our goal is to report how sun irradiance in the plane of the array influences dEL image acquisition of PV panels under direct sunlight and to better specify the irradiance limit for when modulation of the forward bias is necessary instead of constant bias. All this considering reaching the minimum acceptable EL image quality for PV diagnosis using previously available and new signal-to-noise ratio (SNR) markers.
Symbolic dynamics for Lozi maps
Creators: name: Misiurewicz, Michal
name: Stimac, Sonja
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B10, 37D45, 37E30, 54H20

description: In this paper we study the family of the Lozi maps $L_{a,b} : {\mathbb R}^2 \to {\mathbb R}^2$, $L_{a,b} = (1 + y - a|x|, bx)$, and their strange attractors $Λ_{a,b}$. We introduce the set of kneading sequences for the Lozi map and prove that it determines the symbolic dynamics for that map. We also introduce two other equivalent approaches.
Practices of Occupational Health and Safety Management: Case of Bole-Lemi industrial park
Creators: name: Samrawit, Amdewok
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The main purpose of this study was to examine the practice of occupational safety and health in Bole-Lemi industrial park. The researcher used management of organizational safety and health program, employee participation, employee training, hazard identification, hazard prevention and control issues, program evaluation and improvement and implementation of organizational safety and health as an organizational safety and health dimensions to examine the practical implantation of occupational safety and health of employees in the study area. The research is descriptive research. In this research random and purposive sampling techniques was applied to get appropriate representative sample from the population and for triangulation purpose. The researcher collected data from Bole-Lemi industrial park through self-administered questionnaire and interview. One hundred forty-four respondents and eight managerial personnel's were formed the sample size of the study. The collected data was analyzed using statistical package for social science (SPSS) version 1.0. The descriptive statistics and inferential statistics (correlation) were used to describe demographic characteristics of respondent and to answer research questions.
Improvement of the Average Photon Energy Spectral Correction Function for Photovoltaic Performance Forecasting
Creators: name: Daxini, R.
name: Wu, Y.
name: Wilson, R.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 740-743
description: The solar spectrum has a significant impact on the performance of photovoltaic devices, in particular those with a wide bandgap. Accounting for the spectral influence on PV performance requires a mathematical representation of the solar spectrum for analysis. Such representations are traditionally in the form of proxy variables, such as air mass, or parameters calculated directly from measured spectra, such as the Average Photon Energy (APE). The latter is more accurate, but suffers from reduced reliability due to it not being a unique characteristic of the solar spectral distribution. This study proposes a new empirical spectral correction function based on the APE and the depth of a water absorption band, which successfully addresses the APE uniqueness issue. The new model improves the accuracy of the single-variable APE model by up to 10% for a Cadmium Telluride PV device.
Das älteste armenische Lektionar als Zeuge für den gottesdienstlichen Schriftgebrauch im Jerusalem des beginnenden 5. Jahrhunderts
Creators: name: Fischer, Balthasar
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 11 Nr. 2 (1975): Concilium: Internationale Zeitschrift für Theologie, Band 11, Heft 2
Proposal for the Extension of the Energy Rating Standard Series IEC 61853 to Bifacial Modules
Creators: name: Kenny, R.P.
name: Gracia Amillo, A.M.
name: Lyubenova, T.
name: Pavanello, D.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 724-730
description: Bifacial crystalline (c-Si) photovoltaic (PV) devices are already competing with monofacials in the global PV market given the rear side PV generation capacity and the possibilities of new mounting configurations that would allow them to be integrated with other applications and land uses. The IEC 61853 Standard series “Photovoltaic (PV) module performance testing and energy rating” defines a methodology to analyze the performance of PV devices under real working conditions and it could be used to rate and compare devices, providing end-users a tool to select the best suited device for their PV installation. However, the scope of this standard does not include bifacial devices. To that aim, the present paper identifies the required modifications to the standard and proposes a new methodology to extend the energy rating standard to bifacial devices. All four parts of the standard would need to be modified. The proposed methodology has been applied to two c-Si devices under various new mounting configurations relevant to bifacial devices. Results show significant differences, which suggests that the proposed methodology could serve as a tool to compare and select the most appropriate bifacial device for each location and mounting configuration, extending the energy rating Standard series to bifacials.
Generation of Jump-In T-REx HEK293 wild type-overexpression cell lines
Creators: name: Klimek, Christoph
name: Onstein, Svenja
name: Barbosa, Barbara
name: Ingles-Prieto, Alvaro
name: Skucha, Anna
name: Ibig, Yvonne
name: Seuwen, Klaus
name: Wolf, Gernot
Publisher: name: Zenodo
Year: 2022
Subjects: Protocol

description: Protocol for the generation of isogenic wildtype (WT) overexpression (OE) Jump-In T-REx HEK293 cell line pools via transfection.
Invited Article: miniTimeCube
Creators: name: Li, V. A.
name: Dorrill, R.
name: Duvall, M. J.
name: Koblanski, J.
name: Negrashov, S.
name: Sakai, M.
name: Wipperfurth, S. A.
name: Engel, K.
name: Jocher, G. R.
name: Learned, J. G.
name: Macchiarulo, L.
name: Matsuno, S.
name: McDonough, W. F.
name: Mumm, H. P.
name: Murillo, J.
name: Nishimura, K.
name: Rosen, M.
name: Usman, S. M.
name: Varner, G. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present the development of the miniTimeCube (mTC), a novel compact neutrino detector. The mTC is a multipurpose detector, aiming to detect not only neutrinos but also fast/thermal neutrons. Potential applications include the counterproliferation of nuclear materials and the investigation of antineutrino short-baseline effects. The mTC is a plastic 0.2% $^{10}$B - doped scintillator (13 cm)$^3$ cube surrounded by 24 Micro-Channel Plate (MCP) photon detectors, each with an $8\times8$ anode totaling 1536 individual channels/pixels viewing the scintillator. It uses custom-made electronics modules which mount on top of the MCPs, making our detector compact and able to both distinguish different types of events and reject noise in real time. The detector is currently deployed and being tested at the National Institute of Standards and Technology (NIST) Center for Neutron Research (NCNR) nuclear reactor (20 MW$_\mathrm{th}$) in Gaithersburg, MD. A shield for further tests is being constructed, and calibration and upgrades are ongoing. The mTC's improved spatiotemporal resolution will allow for determination of incident particle directions beyond previous capabilities.
description: 19 pages, 29 figures, AIP Review of Scientific Instruments (2016)
Improvement of A LED Bias Light System for the Double Sided Characterization of Bifacial Devices
Creators: name: Lyubenova, T.
name: Kenny, R.P.
name: Shaw, D.
name: Pavanello, D.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 731-734
description: A double-sided solar simulator based on an existing large-area long pulse flash solar simulator and a low-cost LED-based rear bias light has been developed at European Solar Test Installation (ESTI) (Joint Research Centre, European Commission) for studying and validating the double-side indoor testing approach for current-voltage (I-V) characterization of bifacial modules. “Self-reference” methodology is applied using an accredited reference values (ISO/IEC 17025) obtained by single-side illumination. The proposed approach and prototype LED simulator for full size modules has demonstrated adequate performance in comparison with the single-side measurements based on a commercial Class AAA simulator using validated standard methodology. The electrical performance expressed in similar current-voltage (I-V) curves and power output reveals the suitability of the method for characterization of bifacial devices. The LED bias light source could be classified as a “Class C” solar simulator. The analysis of different representative bifacial PV devices available on the market shows different electrical behaviour according to their bifaciality factor.
Distributional Models for Semantic Relations: A Study on Hyponymy and Antonymy
Creators: name: Benotto, Giulia
Publisher: name: Zenodo
Year: 2023

description: The overall purpose of this research project is to study and explore the potential and limitations of the distributional approach with respect to lexical semantics.
 Analyzing paradigmatic relations such as synonymy, antonymy, hypernymy, hyponymy and co-hyponymy while using distributional methods could be very interesting and really challenging. For instance, state of the art semantic distributional methods have difficulties in distinguishing these relations. This is because these relations tend to distribute, within the texts, in a very similar way. We first carried out a study about current state of the art distributional measures developed for the recognition of paradigmatic semantic relations, trying to assess the degree of success reported by such measures. We then used the data we gathered to develop new distributional measures apt to classify the hyponymy/hypernymy relation and the antonymy relation.
 Not only did we prove that distributional methods can indeed be used in order to classify, in a non-supervised way, these relations; we also developed measures, especially conceived for recognizing and classifying hypernymy and antonymy, that performs better than state of the art ones.
Asymmetric sequential Landau-Zener dynamics of Bose condensed atoms in a cavity
Creators: name: Huang, Jiahao
name: Gong, Pu
name: Qin, Xizhou
name: Zhong, Honghua
name: Lee, Chaohong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore the asymmetric sequential Landau-Zener (LZ) dynamics in an ensemble of interacting Bose condensed two-level atoms coupled with a cavity field. Assuming the couplings between all atoms and the cavity field are identical, the interplay between atom-atom interaction and detuning may lead to a series of LZ transitions. Unlike the conventional sequential LZ transitions, which are symmetric to the zero detuning, the LZ transitions of Bose condensed atoms in a cavity field are asymmetric and sensitively depend on the photon number distribution of the cavity. In LZ processes involving single excitation numbers, both the variance of the relative atom number and the step slope of the sequential population ladder are asymmetric, and the asymmetry become more significant for smaller excitation numbers. Furthermore, in LZ processes involving multiple excitation numbers, there may appear asymmetric population ladders with decreasing step heights. During a dynamical LZ process, due to the atom-cavity coupling, the cavity field shows dynamical collapse and revivals. In comparison with the symmetric LZ transitions in a classical field, the asymmetric LZ transitions in a cavity field originate from the photon-number-dependent Rabi frequency. The asymmetric sequential LZ dynamics of Bose condensed atoms in a cavity field may open up a new way to explore the fundamental many-body physics in coupled atom-photon systems.
description: 14 pages, 6 figures
Impact of Technological Trends in Crystalline Silicon PV Modules on the Energy Yield Performance: Preliminary Result of the 14th SUPSI Outdoor Measurement Campaign
Creators: name: Friesen, G.
name: Caccivio, M.
name: Özkalay, E.
name: Valoti, F.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 712-715
description: In the last years, many technological changes at cell and module level were introduced into the market getting very fast mainstream, despite the limited field experience. All changes aim at improving the module efficiency and yield to lower the prices of PV energy. Some examples of improvements affecting the energy yield are for example the reduction of resistive losses by cutting the cells, the increased power density in shingled modules, or the lower temperature coefficients obtained with the new contact passivation technologies. Each technological change can bring with it some potential risks which can affect the performance and reliability and the combination of more than one at the same time can lead to unexpected or counter-acting effects. The results of this study want to fill the gap of limited field data of these new module technologies, demonstrate the claimed advantages and identify any early stage degradation issues. The performance analysis is performed by means of scientific monitoring data in combination with module characterization in the laboratory. The stability of the modules is controlled over time to detect any occurring degradation or meta-stability.
Measuring Performance of Reverse Logistics System in Pet Bottles Recovery in Eabsco.
Creators: name: Wondimu, Sirak
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The East Africa Bottling Share Company(EABSCo) , Coca-Cola's leading local independent franchise bottling partners, has commissioned a $50 million (ETB 800 million) to manufacture 750 ,000 recyclable bottles per day to meet increasing demand for Coca-Cola beverages in Ethiopia (Press release , Sept 2012). This research is aimed to measure the performance of reverse logistics in recovering PET bottles of EABSCo. Quantitative and qualitative research is employed. Both primary and secondary data gathered and analyzed. The study finding revealed although there is understanding and application of reverse logistics to recover asset such as Returnable Glass Bottles (RGB), this case does not indicated in terms of recovering post-consumer PET bottles. There supporting evidence unavailability legal enforcement in the country significantly affected EABSCo to engage in recovery of PET bottles through well established. There is evidence showing absence of legal framework is reflected on company's policy failure to embrace as must to do activities. This further implied for lack of recognizing recovering PET bottles as a key competitive of the company. In Conclusion, according to Alvarez-Gil et al. (2007), supply chain players are suggested to be the motivators of reverse logistics implementation. In contrary , there is no effort being done linked to recovering of PET bottles either through its well own recovery chain or through creating integration with inform waste recovery chain. The research is limited by unavailability of information due to thematic areas new areas for the industry. In terms of future areas of research measuring the performance which includes the full supply chain actors is an areas which requires further investigations. Secondly, additional research can be conducted to understand the product life cycle analysis of PET bottles in Ethiopia. Further research could also be done to better understand the social and economic impact of improper waste disposal that might arise from plastic wastes such as PET bottles
Örtliches Auslegungskonzept gegen Pittingversagen bei randschichtgehärteten Zahnrädern
Creators: name: Eric, Aleksandar
Publisher: name: KIT Scientific Publishing
Year: 2023
Subjects: Pitting
Grübchenbildung
Zahnradermüdung
Zahnradberechnung
örtliches Auslegungskonzept
gear fatigue
gear design
local fatigue concept

description: Die Auslegung von Zahnrädern gegen Pittingschäden basiert im Wesentlichen auf einfachen physikalischen Modellen und empirisch ermittelten Faktoren. Im Gegensatz dazu wird in dieser Arbeit ein auf lokalen Größen basierendes örtliches Auslegungskonzept vorgestellt, das eine detailliertere Betrachtung verschiedener Einflussparameter auf die zu erwartende Pittinglebensdauer erlaubt.
Silicon Based Nano-electronic Synaptic Device for Neuromorphic Hardware
Creators: name: Sikder, Orthi
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 400802
subject: Electrical circuits and systems

description: Porous silicon (po-Si) is a unique form of silicon (Si) that features tunable nanopores distributed throughout its bulk structure. While crystalline Si (c-Si) already boasts technological advantages, po-Si offers an additional key aspect with its large surface area relative to its small volume, making it highly conducive to surface chemistry. In this research, our focus centers on the design of a synaptic device based on po-Si, exploring its potential for neuromorphic hardware applications.
To begin, we delve into the analysis of several electrical properties of po-Si using density functional theory (ab initio/first principles) calculations. Notably, we discover the presence of intra-pore dangling states within the bandgap region of po-Si. Although po-Si is known for its higher bandgap compared to c-Si, resulting in low carrier density and increased resistance, the existence of these dangling states significantly impacts its electronic transport.
Additionally, we investigate the electric-field driven modulation of dangling bonds through controlled intra-pore Si-H bond dissociation. This modulation enables precise control over the density of dangling states, facilitating the tunability of po-Si conductance. Theoretically evaluating the current-voltage characteristics of our proposed po-Si based synaptic devices, we determine the potential range of obtainable conductivity.
Finally, we evaluate the performance by integrating porous silicon nanoelectronics devices into neural networks. These devices exhibit superior synaptic plasticity, faster response times, and reduced power consumption compared to other synapses. The research indicates that poroussilicon devices are highly effective in neuromorphic systems, paving the way for more efficient and scalable neural networks. These advancements have significant practical and cost-effective implications for a wide range of applications, including pattern recognition, machine learning, and artificial intelligence.
Overall, our analyses reveal that the integration of po-Si based synaptic devices into the neural fabric offers a path towards achieving significantly denser and more energy-efficient neuromorphic hardware. With its tunable properties, large surface area, and potential for controlled conductance, po-Si emerges as a promising candidate for the development of advanced silicon based nano-electronic devices tailored for neuromorphic computing. As we delve deeper into the potentials of po-Si, the era of cognitive computing, inspired by the elegance of bio-mimetic neural networks, edges closer to becoming a reality.
Generation of Single Cell Knockout Clones
Creators: name: Onstein, Svenja
name: Klimek, Christoph
name: Barbosa, Barbara
name: Skucha, Anna
name: Wolf, Gernot
Publisher: name: Zenodo
Year: 2022
Subjects: Protocol

description: Protocol for the generation of single cell knock out (KO) clones via lentiviral transduction.