cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Error Correction in Quantum Field Theory and Gravity
Creators: name: Furuya, Keiichiro
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Quantum physics not elsewhere classified
Mathematical aspects of classical mechanics, quantum mechanics and quantum information theory
Mathematical aspects of quantum and conformal field theory, quantum gravity and string theory

description: Holographic duality as a rigorous approach to quantum gravity claims that a quantum gravitational system is exactly equal to a quantum theory without gravity in lower spacetime dimensions living on the boundary of the quantum gravitational system. The duality maps key questions about the emergence of spacetime to questions on the non-gravitational boundary system that are accessible to us theoretically and experimentally. Recently, various aspects of quantum information theory on the boundary theory have been found to be dual to the geometric aspects of the bulk theory. In this thesis, we study the exact and approximate quantum error corrections (QEC) in a general quantum system (von Neumann algebras) focused on QFT and gravity. Moreover, we study entanglement theory in the presence of conserved charges in QFT and the multiparameter multistate generalization of quantum relative entropy.
An X-ray and Radio Study of the Varying Expansion Velocities in Tycho's Supernova Remnant
Creators: name: Williams, Brian J.
name: Chomiuk, Laura
name: Hewitt, John W.
name: Blondin, John M.
name: Borkowski, Kazimierz J.
name: Ghavamian, Parviz
name: Petre, Robert
name: Reynolds, Stephen P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present newly obtained X-ray and radio observations of Tycho's supernova remnant using {\it Chandra} and the Karl G. Jansky Very Large Array in 2015 and 2013/14, respectively. When combined with earlier epoch observations by these instruments, we now have time baselines for expansion measurements of the remnant of 12-15 year in the X-rays and 30 year in the radio. The remnant's large angular size allows for proper motion measurements at many locations around the periphery of the blast wave. We find, consistent with earlier measurements, a clear gradient in the expansion velocity of the remnant, despite its round shape. The proper motions on the western and southwestern sides of the remnant are about a factor of two higher than those in the east and northeast. We showed in an earlier work that this is related to an offset of the explosion site from the geometric center of the remnant due to a density gradient in the ISM, and using our refined measurements reported here, we find that this offset is $\sim 23"$ towards the northeast. An explosion center offset in such a circular remnant has implications for searches for progenitor companions in other remnants.
description: Accepted for publication in ApJ Letters
Aldus Manutius the Younger, De Antiquis Numerorum Notis
Creators: name: Manzuio, Aldo
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Money
valueUri: http://id.worldcat.org/fast/1025265
subject: Coins, Italian
valueUri: http://id.worldcat.org/fast/866786
subject: Numerals, Writing of
valueUri: http://id.worldcat.org/fast/1041261
subject: Coins, Roman
valueUri: http://id.worldcat.org/fast/866847
subject: Sestertius (Coin)
valueUri: http://id.worldcat.org/fast/1113574

description: This elegant and fascinating humanistic booklet contains unique manuscript copies of two short arithmetic treatises by Aldus Manutius the Younger, classical scholar, printer, and owner of the eminent Aldine Press. These texts were quite possibly copied before either was first printed, and the second treatise displays some significant differences from the print version. Both are worth closer study as early works of classical scholarship, for their connection to the Manutius family, and as possible witnesses to Manutius's compositions before they went to press. -- Les Enluminures website. De antiquis numerorum notis : included in the 'Epitome orthographi??' of Aldus Manutius the Younger, first printed in 1575 by the Aldine press in Venice. Interpraetatio numerorum quibus in ratione pecuniaria veteres utebantur : first printed under the title 'De sestertiis, ad Johannem Cratonem a Crafftheim' in the 'De quaesitis per epistolam' of Aldus Manutius the Younger, first printed by the Aldine Press in 1576 in Venice.
Light Reflection Analysis of PV Modules: Comparison to Building Facdes and Assessing the Possibility of Glare
Creators: name: Moereke, J.
name: Borowski, P.
name: Grünsteidl, S.
name: Palm, J.
name: Sapkota, S.
name: Dalibor, T.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
PV and Buildings

description: 8th World Conference on Photovoltaic Energy Conversion; 1050-1056
description: Light reflection measurements have been performed on several PV modules as well as a range of passive façade materials. The measurements have been performed in specular direction according to DIN EN ISO 2813 and resulted in the confirmation of very matt appearance for special façade PV modules compared to commonly used building façades. BRDF analysis of these façade PV modules further showed the absence of a specular reflection peak compared to glossy samples and established maximum reflection to occur at reflection angles above 80° to the normal of the module and in-plane with light incidence. Luminance estimations suggest that levels of absolute glare are only reached with both maximum Sun irradiation as experienced on Earth and geometries of maximum reflection. Since these geometries and irradiances occur for an observer of a south-facing façade BIPV installation only in the morning and evening hours, the risk of glare from the analysed façade PV modules is considered negligible.
Glass Digital Printer Characterization for Optimization of BIPV Aesthetic vs Performance Balance
Creators: name: Riedel, B.
name: Thony, P.
name: Tsanakas, I.
name: Ménézo, C.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
PV and Buildings

description: 8th World Conference on Photovoltaic Energy Conversion; 1057-1060
description: This paper shows experimental studies and theoretical calculations of colorimetry as well as solar efficiency of glass digital printing. The main goal is to optimize the aesthetics and performance balance of building integrated photovoltaics customized (BIPV) with printed glass. The primary inks used by the printer are characterized. Color and power production measurements of PV module that used printed glass are then compare with theory. The influence of the ink thickness is also evaluated from measured spectra. Despite an important difference between theoretical results and measurements, a ranking of best transmitters’ ink is observed. Therefore, the measured values can help to predict the power production and the final color when drawing a future BIPV design. Decreasing the ink thickness allows increasing the power production in the same time of decreasing the color saturation. The ranking of best transmitters ink permit to elaborate an optimization method for design drawing, when the control of ink thicknesses permit to match the expected color.
Spatiotemporal Evolution of Topological Order Upon Quantum Quench Across the Critical Point
Creators: name: Lee, Minchul
name: Han, Seungju
name: Choi, Mahn-Soo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a topological superconducting wire and use the string order parameter to investigate the spatiotemporal evolution of the topological order upon a quantum quench across the critical point. We also analyze the propagation of the initially localized Majorana bound states after the quench, in order to examine the connection between the topological order and the unpaired Majorana states, which has been well established at equilibrium but remains illusive in dynamical situations. It is found that after the quench the string order parameters decay over a finite time and that the decaying behavior is universal, independent of the wire length and the final value of the chemical potential (the quenching parameter). It is also found that the topological order is revived repeatedly although the amplitude gradually decreases. Further, the topological order can propagate into the region which was initially in the non-topological state. It is observed that all these behaviors are in parallel and consistent with the propagation and dispersion of the Majorana wave functions. Finally, we propose a local probing method which can measure the non-local topological order.
description: 21 pages; 11 figures
Bifacial PV Balcony and Terrace Fences
Creators: name: Valckenborg, R.
name: Villa, S.
name: Van Aken, B.B.
name: Burgers, T.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
PV and Buildings

description: 8th World Conference on Photovoltaic Energy Conversion; 1028-1034
description: We have developed a bifacial PV fence that can be used both on balconies and terraces. For aesthetical reasons the PV fence mimics balusters, by alternating vertical columns of PV cells and (partially) transparent areas. As a result the solar cells cover about 60% of the bifacial fence. We present the full year performance of such a vertical bifacial BIPV-system, by experimental validation of two prototypes. These results are supported by simulation studies, in particular quantifying the shading behaviour, both of fence on fence, but also of the intrinsic horizontal and vertical construction elements of the balcony or terrace fences. One prototype is a west-facing balcony, about one meter from the façade. The bifacial modules on this balcony produce 624 kWh/kWp which corresponds to a PRbifacial=88%. The other prototype is a square-shaped roof terrace fence, consisting of three modules on each side. We present a full analysis of the annual yield for all four sides. The east, west and south side have a specific yield in-line with the performance of a perfectly oriented monofacial module in the Netherlands. The BIGEYE modelling of this system results in a very good agreement between modelled and measured kWh generation per month. Also, we give a detailed insight into which horizontal or vertical construction element causes the most shading losses for each module. The vertical posts on the inside of the northern fence create the largest shading loss, followed by the horizontal toprails above the south, west and east fence and the vertical posts inside of the west and east side. These shading losses are incurred mostly by the north fence (9%) and least by the south (3%).
Most Demanding Standard Combination to Support BIPV Development and Sustainability – Fire Safety
Creators: name: Boddaert, S.
name: Parolini, F.
name: Bonomo, P.
name: Awais, M.
name: Pirotta, C.
name: Jimenez, J.
name: Vega De Seoane, J.M.
name: Valecia-Caballero, D.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
PV and Buildings

description: 8th World Conference on Photovoltaic Energy Conversion; 1035-1040
description: The growing development of renewable energies including photovoltaics [1] and increasing request for reducing the energy consumption of the building stock has furthered the photovoltaic integration into architecture (BIPV) in more and more different solutions to finally become components of construction. Therefore, the BIPV components should not be evaluated separately as a constructive element or as a simply photovoltaic product, but as an active set element, able to produce energy, which supports a constructive role and different additional functionalities. These products are complex to be evaluated according to traditional standards based on specific sequences or procedures to fulfil exclusively the building requirements. A combined approach is rarely proposed to evaluate the BIPV components in real operating conditions. In the European project BIPVBOOST [2], aspects related to the construction and photovoltaic sector were considered and missing gap are analysed in the project report D5.1 [3]. A new approach based on performance was proposed that could define a set of new test procedures for the qualification of BIPV products considering them as active building products. The objective is to determine whether the proposed methodology is representative (validation) and whether the electrical effects observed are significant and require the definition of new standards. This work takes into consideration of the photovoltaic cell technologies used as well as the mode of implementation in the building.
The Art and Science of Integrating Photovoltaics in the Built Environment: Case Study of The UFSC Solar Energy and Green H2 Laboratory
Creators: name: Pauli Custódio, I.
name: Portolan Dos Santos, Í.
name: Rüther, R.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
PV and Buildings

description: 8th World Conference on Photovoltaic Energy Conversion; 1041-1049
description: The progressive use of photovoltaic (PV) modules as construction materials is changing the shape of the built environment. Architectural integration quality can be achieved by virtue of the available technical information, but to explore the technology’s full potential, non-technical features must also be considered. Architects and engineers need to get a better insight of how the application of PV modules can be interpreted from theories of architectural perception. This work proposes a method to identify how the perception of PV systems influences architectural spatial experience, that is, how they affect people’s movement in spaces. It complements the investigations that were proposed so far, as architectural criticism should consider both constructions and spaces. The new green H2 laboratory of the Solar Energy Research Laboratory Fotovoltaica/UFSC in Florianópolis/Brazil is presented as a practical example of the theory and practice of integrating solar photovoltaics in the built environment, addressing simultaneously the onsitegeneration of electricity for the building, and the production of green H2 directly from solar electricity and water electrolysis. The work means to serve as inspiration, expanding the use of PV modules as a way of architectural expression and narrowing the gap between the design and the PV communities.
Not Just a Phase: Bose Metal Unveiled
Creators: name: Phillips, Philip W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: I analyze the recent observation of a Bose metal in NbSe$_2$ and place these results in the wider context of the first sighting of such a phase in amorphous Bi and MoGe thin films.
description: slightly extended version to include more references than was allowed in the published form
A Khovanov stable homotopy type for colored links
Creators: name: Lobb, Andrew
name: Orson, Patrick
name: Schuetz, Dirk
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57M27

description: We extend Lipshitz-Sarkar's definition of a stable homotopy type associated to a link L whose cohomology recovers the Khovanov cohomology of L. Given an assignment c (called a coloring) of positive integer to each component of a link L, we define a stable homotopy type X_col(L_c) whose cohomology recovers the c-colored Khovanov cohomology of L. This goes via Rozansky's definition of a categorified Jones-Wenzl projector P_n as an infinite torus braid on n strands. We then observe that Cooper-Krushkal's explicit definition of P_2 also gives rise to stable homotopy types of colored links (using the restricted palette {1, 2}), and we show that these coincide with X_col. We use this equivalence to compute the stable homotopy type of the (2,1)-colored Hopf link and the 2-colored trefoil. Finally, we discuss the Cooper-Krushkal projector P_3 and make a conjecture of X_col(U_3) for U the unknot.
description: 16 pages, 6 figures
Tameness in the Fréchet spaces of analytic functions
Creators: name: Aytuna, Aydın
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: Primary 46A61, 46E10, 32A70, 46A63, Secondary 32U15

description: We investigate tameness in the Fréchet spaces O(M) of analytic functions on Stein manifolds M equipped with the compact open topology. Actually we will look into tameness in the more general class of nuclear Fréchet spaces with the properties weak DN and Omega, and then specialize to analytic function spaces. We show that for a Stein manifold M, tameness of O(M) is equivalent to the hyperconvexity of M.
description: Dedicated to the memory of Tosun Terzio\u{g}lu. 26 pages
Single-Site Forecasts for 130 PV Systems at DSO Level, Using a Hybrid-Physical Approach, to Enable Future Smart-grid Operation
Creators: name: Koster, D.
name: Fiorelli, D.
name: Braun, C.
name: Bruneau, P.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Solar Resource and Forecasting

description: 8th World Conference on Photovoltaic Energy Conversion; 1020-1023
description: With rising shares of photovoltaic (PV) generated electricity in our power grids, PV power forecasting is rapidly gaining importance for energy suppliers and grid operators. But specifically the distribution system operators (DSO) will require detailed forecasts at higher spatial resolutions, to manage grid congestions and avoid voltage band violations, which are local phenomena. In view of future smart grid operation, we propose a forecasting scheme using numerical weather prediction (NWP) data to feed a PV performance model and compute single-site power forecasts. The intra-day outcomes of this rather conventional forecasting scheme are combined with a supervised-learning model, based on recurrent neural networks (type: long- short-term memory, LSTM) which is fed by the 15 minutes measurement data of the two previous days for each PV system. This approach accounts for different local effects, not covered by the NWP-based physical model, such as partial shading or snow cover. Further, it will mitigate impacts of “imperfect” data on side of the DSOs, used to parametrize the PV performance model. This hybrid-physical approach has been applied to about 130 PV systems, validated over a two years period and yielded a normalized root mean square error of 8.3% and 8.7% in 2020 and 2021.
Examining Fringe Team Sport: An Exploration of Dodgeball
Creators: name: Mergler, Jason
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Sports Studies
subject: Social and Behavioral Sciences
subject: Athlete development
subject: Fringe sport
subject: Canada
subject: Team sport

description: To date, there has been no scoping review that has examined fringe team sports, let alone Canadian fringe team sports or their athletes. Additionally, preliminary findings demonstrate that fringe sport in general is not broadly studied, especially compared to mainstream sport. As such, it is important to determine the extent of research in this area through a scoping review methodology which can successfully capture its breadth, identify its gaps within the Canadian context, and discover the range of research that focuses on the development of fringe team sport athletes.
Design of "Hotspot-Free" BIPV Modules - Peranakan PV
Creators: name: Saw, M.H.
name: Nalluri, S.
name: Pravettoni, M.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
PV and Buildings

description: 8th World Conference on Photovoltaic Energy Conversion; 1024-1027
description: Coloured PV modules are nowadays gaining interest and becoming more prevalent, with their potential for architecturally harmonious integration in buildings. However, with the printing of different colours onto the module front surface, the series-interconnected solar cells are subjected to non-uniform shading: these colourful modules suffer from mismatch losses and are susceptible to developing hot-spots. In this paper, we present an innovative colourful PV module technology with mitigated mismatch loss and no hot-spot formation risk. It is curated based on two novel design principles: (i) selection of colours (two and above) and tuning of printing parameters for each colour such that the different colours have the same amount of optical transmittance, i.e. equivalent short-circuit current; and (ii) applying a repetition design across the PV module, i.e. all solar cells have the same pattern coverage area/ratio. As a result, all solar cells in the PV module are designed to receive uniform optical irradiance. Highlighting the connection with the local environment and traditions, we demonstrate our innovative module design technology by developing colourful and patterned PV modules that are inspired by the Peranakan culture uniquely to Singapore and Malaysia, coined as “Peranakan PV”. This unique BIPV solution combines both tradition and innovation in a reliable and beautiful PV product that is well suited for integration into the façades (building-integrated PV, BIPV) of heritage as well as modern buildings. The design principles have been filed with the Registry of Patents Singapore in October 2021 as “Design principles for multi-coloured and patterned photovoltaic (PV) modules” (SG Non-Provisional Application No. 10202111422S).
A high transmission broadband gradient index lens using elastic shell acoustic metamaterial elements
Creators: name: Titovich, Alexey S.
name: Haberman, Michael R.
name: Norris, Andrew N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The use of cylindrical elastic shells as elements in acoustic metamaterial devices is demonstrated through simulations and underwater measurements of a cylindrical-to-plane wave lens. Transformation acoustics (TA) of a circular region to a square dictates that the effective density in the lens remain constant and equal to that of water. Piecewise approximation to the desired effective compressibility is achieved using a square array with elements based on the elastic shell metamaterial concept developed in [30]. The size of the elements are chosen based on availability of shells, minimizing fabrication difficulties. The tested device is neutrally buoyant comprising 48 elements of nine different types of commercial shells made from aluminum, brass, copper, and polymers. Simulations indicate a broadband range in which the device acts as a cylindrical to plane wave lens. The experimental findings confirm the broadband quadropolar response from approximately 20 to 40 kHz, with positive gain of the radiation pattern in the four plane wave directions.
description: 11 pages, 10 figures
Die Idee der persönlichen Unsterblichkeit und die marxistische Kritik der religiösen Entfremdung
Creators: name: Prucha, Milan
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 11 Nr. 5 (1975): Concilium: Internationale Zeitschrift für Theologie, Band 11, Heft 5
Evaluation of WRF-Solar Cloud Forecast Using the NSRDB
Creators: name: Yang, J.
name: Sengupta, M.
name: Xie, Y.
name: Habte, A.
name: Jimenez, P.A.
name: Kim, J.H.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Solar Resource and Forecasting

description: 8th World Conference on Photovoltaic Energy Conversion; 1009-1011
description: The cloud forecast is a crucial component in predicting solar irradiance from numerical weather prediction (NWP) models. Assessing cloud properties from NWP models requires significant work due to the need for high-quality data, spatial analysis covering the model’s extent, and detailed analysis of the model’s performance for different types of clouds. This study presents an evaluation of the Weather Research and Forecasting (WRF)-Solar cloud forecast using the National Solar Radiation Database (NSRDB). We propose an evaluation framework applied to a single model prediction as well as ensemble-based forecasts. Various cloud detection metrics are calculated for comparison with the satellite-derived data set. The mismatched clouds from WRF-Solar are quantified using nine cloud types classified by cloud top height and cloud optical depth. The results based on the WRF-Solar forecasts covering the entire United States for the full year of 2018 show mismatched cloud frequencies ranging from 8%–46% for thick and high-level (deep convective) to thin and low-level (cumulus) clouds.
Assessing the Satisfaction of Exploration Companies, Exploring Gold and Base Metal, with Services Provided by Ministry of Mines and Petroleum of Ethiopia
Creators: name: Fitsum, Assefa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The mining sector remains to be one of the priority sectors for Ethiopia's second growth and transformation plan (GTP II). One of the strategic directions put forward to achieve this plan is attracting foreign direct investment for exploration and extraction of minerals. However, there is an annual decline in application for exploration licenses by foreign exploration companies since 2013. Assessing existing exploration companies level of satisfaction is crucial in retaining existing exploration companies and attracting new ones. Not conducting a periodic customer satisfaction survey in any organization may make the organization to speculate or interpret areas for service improvement based on the organizations own assessment of its services. Therefore, it is the purpose of this research to measure the satisfaction level of existing foreign exploration companies with services provided by mineral licensing and administration directorate. The study applied a mixed research method by collecting both qualitative and quantitative data from foreign and joint venture exploration companies through survey and qualitative data collected by means of semi structured interview from three key informants from Ministry of Mines of Ethiopia. Descriptive data analysis was conducted on the reliability, responsiveness, communication, service accessibility and facility service dimensions for the services provided by mineral licensing case team, mineral license administration case team and mineral licensing and administration directorate. And based on the level of importance attached to the service dimensions an importance-performance analysis (IPA) was conducted to identify priority areas for service improvement. The research findings showed that 50% of foreign and joint venture exploration companies exploring gold and base metal are dissatisfied with the reliability and responsiveness service dimension of mineral licensing and mineral license administration case teams' services. Reducing the service delivery time, putting a simplified procedure in place and making available up-to-date information that inform applicants everything that they had to do in order to get mining related service are priority areas for improvement identified by the exploration companies. The limitation of study is its generalizability to minerals other than gold, exploration company types and organizations. The impact of factors such as infrastructure, political stability and local community relations on exploration companies could be potential research areas.
Improved Blending of PV Power Forecasts in Case of Measurements with Limited Reliability
Creators: name: Herzberg, W.
name: Holland, N.
name: Zech, T.
name: Bor, J.
name: Lorenz, E.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Solar Resource and Forecasting

description: 8th World Conference on Photovoltaic Energy Conversion; 1012-1019
description: For forecasting the power output of a photovoltaic (PV) power plant, solar irradiance forecasts are an essential input. Forecasts generated from different sources and models such as satellite data, numerical weather models, or irradiance measurements, perform differently depending on the forecast horizon. An optimized forecast for each horizon can be derived by combining several different source forecasts via a machine learning (ML) model to create a resulting ‘blended’ forecast. The training of an ML blending model requires power generation data of the considered PV power plant as a target variable. Typically, power measurements from the plant are used for this purpose. However, poor quality or limited availability of power measurements will lead to low quality blended forecasts as a result. In this work we consider intra-day forecasts, obtained from blending numerical weather predictions with satellite-derived forecasts, for a large PV plant with a capacity of 1 GW. The plant is frequently subject to curtailment by grid operators, which limits the reliability of its power measurements. This poses a significant challenge for the optimization of the blending model, resulting in a notable underestimation of the power forecasted by the model in high-power situations. We present an approach to improve forecast blending by using satellite derived power as a replacement for measurements in model training. We evaluate the effect of this replacement for two different ML blending models: a Huber linear regressor and a neural network. The performance of the different models is characterized by employing commonly used metrics such as RMSE and BIAS, as well as a distribution-oriented evaluation framework.
Assessment of Factors Influencing Freight Mode and Carrier Selection: the Case of Packtra PLC Addis Ababa, Ethiopia
Creators: name: Ayele, Atitegeb
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Due to an increasingly competitive market, companies forced to give due emphasis on determinants of freight transportation mode and carrier choice. Nowadays, having the best production system, producing with the best quality and offering to sale at the cheapest price are not enough to achieve competitiveness on the market. Business enterprises required to deliver their end-products to end-customers at the right time with the optimum way. Nonetheless, a delay of freight in transit is common problem for most land locked countries. Ethiopia, as one of these countries, is a victim of long transit periods coupled with additional transit charges. To this end, investigating and analyzing the factors contributing to the delay are worth of pondering. Hence, the purpose of this study was identifying factors influencing freight mode and carrier choice in the case of Packtra Plc, which is a company involved in the activities of inland logistic provision service in Ethiopia. The influence of important factors such as cost, time and reliability, safety and security, capacity, service, product nature, IT and managerial decision have been considered. The study has incorporated both primary and secondary source of data. The primary data was collected using 5 scale Likert's scale questionnaire. Secondary data was collected using journal articles and internet website. Out of 70 total populations 61 valid responses were collected. The data was analyzed descriptively through the use of Statistical Packages for Social Studies (SPSS) version 20. Result is presented in tables. The study tried to focus on factors of influencing freight transport mode and carrier choice. Consequently, it has been revealed that transportation price, purchasing contract, reliability of on time delivery, reliability of on time pickup, and product characteristics related factors influencing freight transport mode and carrier selection of the Packtra. Among the factors, the issues of security are very important for the reliability and safe arrivals of goods. It is concerned with the wellbeing of the goods in transit. Companies should consider the issues of security seriously. However safety and security being considered least preferred determinants factors of freight mode and carrier choice factor
Effectiveness of Short Ground-Based Measurement Campaigns of Surface Albedo
Creators: name: Lara-Fanego, V.
name: Gueymard, C.A.
name: Cebecauer, T.
name: Suri, M.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Solar Resource and Forecasting

description: 8th World Conference on Photovoltaic Energy Conversion; 999-1003
description: Bifacial PV technology is now becoming a key component of the solar energy industry. Several studies have investigated the quantification of bifacial gains as a function of surface albedo. Because of the latter’s high spatiotemporal variability and lack of appropriate global data at high resolution, there is now a strong demand for the precise characterization of the local albedo at the design stage of many solar projects. A practical and inexpensive strategy to quantify the surface albedo and its spatiotemporal variability—as currently used in some real projects— consists in obtaining in-situ observations with a portable albedometer through short measurement campaigns of just a few days. Assuming that the mean deviation between these scarce observational measurements and those from moderate-resolution satellite-derived long-term time series of global albedo data is reasonably invariant over the entire long-term period covered by the latter, these satellite-based estimates can be corrected, using a sort of site-adaptation method, to ultimately confer the appropriate long-term variability to the albedo data. This work investigates the preliminary performance of such a strategy, focusing on the albedo’s temporal variability. A database of albedo measurements recorded at 7 reference radiometric stations in the USA is used. Results show that very short-term campaigns of ground-based measurements and the ulterior satellite correction are not sufficient for the proper characterization of the surface albedo at any of the sites studied. Notwithstanding, it is found that a significant reduction in the systematic deviations between modeled and observed values is possible through the proposed site-adaptation technique. Depending on location, the latter can provide valid results with typically a few months of ground measurements, i.e., shorter than the 12-month period usually recommended for site adaptations of the solar resource.
Can Hope and Optimism Interventions Be Delivered Online? A Pilot Study in College Students
Creators: name: Ahamadeen, Fathima Naheeda Riaz
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 520302
subject: Clinical psychology

description: Hope and optimism are associated with many positive life outcomes, including better physical functioning (Cherry et al., 2017), less psychological dysfunction (Shanahan et al., 2021), and general well-being and better academic achievement in college students (Rand et al., 2020). College students in particular are known to struggle with a variety of issues and could benefit from increased hope and optimism. Interventions have been developed to increase hope and optimism, but these have largely been delivered in person. The purpose of this pilot study was to examine the feasibility and acceptability of delivering hope and optimism interventions in an online format to college students. There was mixed evidence of feasibility, but results did suggest online hope and optimism interventions are acceptable to college students. Although 94.3% of participants were retained, only 23% of participants met the active engagement word count requirement across conditions, and only 52.2% of participants adhered to intervention instructions in the hope condition. Acceptability was met across conditions with most participants reporting engagement (89.6%), vividly imagining their scenario (94.3%), thinking carefully about the prompt (95.4%), and putting effort into the task (93.1%). Examining the preliminary efficacy of these interventions showed no differential changes in state measures across conditions, although there were overall changes for hope and optimism across all conditions. Thus, it may be useful to examine these findings further in a fully powered study to determine the efficacy of these interventions.
Simulation of the Irradiance and Yield Calculation of Bifacial PV Systems in the USA and Germany by Combining Ray Tracing and View Factor Model
Creators: name: Grommes, E.M.
name: Schemann, F.
name: Klag, F.
name: Nows, S.
name: Blieske, U.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Solar Resource and Forecasting

description: 8th World Conference on Photovoltaic Energy Conversion; 1004-1008
description: Compared to conventional photovoltaic (PV), there are more influencing factors in bifacial photovoltaics to be considered to calculate incoming irradiance and energy yield. Accurate models are required to investigate the influences of the elevation, the albedo of the ground, the shading conditions between the PV rows and many other rearside related factors. This paper combines the ray tracing (RT) and view factor (VF) models to calculate the irradiance with a subsequent electrical yield calculation using the one-diode model. To verify the results of the developed opensource simulation program BifacialSimu, accurate data from a plant in Golden, USA and a commercially operated plant in Germany are used. Comparing the actual data, it can be concluded that a combination of RT and VF models seems valid for more extended simulation periods of several months since the relative errors balance out. The RT-only simulation accurately reproduces the precise hourly radiation and electrical yield pattern. Still, a continuous positive deviation was found, which does not even out over long periods and is thus less accurate than the VF/RT combination. A simulation for a single month with RT can take several hours. Thus, the best simulation mode results according to user requirements.
Fear of pesticide residues and preference for domestically produced strawberries
Creators: name: Milford, Anna Birgitte
name: Trandem, Nina
name: Garcia Pires, Armando José
name: Milford, Anna Birgitte
name: Trandem, Nina
name: Garcia Pires, Armando José
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Crop Production/Industries
subject: Strawberries
subject: Country of origin
subject: Pesticides
subject: Norway
subject: Willingness to pay (WTP)
subject: Integrated pest management (IPM)

description: Due to an EU directive making integrated pest management (IPM) mandatory, European farmers are expected to reduce their use of chemical pesticides, which may potentially increase production costs and risk of harvest loss. Less pesticide use is appreciated by many consumers and may generate a higher willingness to pay (WTP). However, IPMis a wide concept and it is difficult for consumers to distinguish between products with high and low risk of pesticide residues. As a result, consumers might use other characteristics, such as country of origin, for the identification of safer products. In this study, we investigate if a higher WTP for Norwegian strawberries is associated with a belief that they contain less pesticide residues than imported berries. We use regression analysis to estimate to what extent the difference inWTP for Norwegian and imported strawberries is correlated with various perceptions about strawberries. The analyses reveal that the stronger the belief that Norwegian strawberries have less pesticide risk than imported ones, the higher the WTP for Norwegian strawberries. This means that if consumers believe domestic farmers use little pesticides, domestic products might be able to sell at considerably higher prices than imports. Hence, it may be economically beneficial for farmers to keep pesticide use at a minimum. Furthermore, we find that consumers have a higher WTP for strawberries produced with less use of pesticides, although not pesticide-free, indicating that IPM is appreciated.
Observations of an X-shaped Ribbon Flare in the Sun and Its Three-dimensional Magnetic Reconnection
Creators: name: Li, Y.
name: Qiu, J.
name: Longcope, D. W.
name: Ding, M. D.
name: Yang, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report evolution of an atypical X-shaped flare ribbon which provides novel observational evidence of three-dimensional (3D) magnetic reconnection at a separator. The flare occurred on 2014 November 9. High-resolution slit-jaw 1330 A images from the Interface Region Imaging Spectrograph reveal four chromospheric flare ribbons that converge and form an X-shape. Flare brightening in the upper chromosphere spreads along the ribbons toward the center of the "X" (the X-point), and then spreads outward in a direction more perpendicular to the ribbons. These four ribbons are located in a quadrupolar magnetic field. Reconstruction of magnetic topology in the active region suggests the presence of a separator connecting to the X-point outlined by the ribbons. The inward motion of flare ribbons in the early stage therefore indicates 3D magnetic reconnection between two sets of non-coplanar loops that approach laterally, and reconnection proceeds downward along a section of vertical current sheet. Coronal loops are also observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory confirming the reconnection morphology illustrated by ribbon evolution.
description: ApJL accepted. Comments are welcome
Novel Measurement Concept for AgriPVplus Systems - A Triple Use Approach
Creators: name: Sánchez, H.
name: Dittmann, S.
name: Tosello, S.
name: Meza, C.
name: Dullau, S.
name: Meyer, M.H.
name: Scholz, P.
name: Tischew, S.
name: Gottschalg, R.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Infrastructure-integrated PV (I2PV) and Nature-inclusive PV (eco-PV); Vehicle Integrated PV (VIPV)

description: 8th World Conference on Photovoltaic Energy Conversion; 992-995
description: The European Green Deal aims for Europe becomes the world's first climate-neutral continent by 2050. In this strategy, Photovoltaic (PV) is one of the key technologies to reduce significant greenhouse gas emissions. However, large ground-mounted PV power plants generate conflict between stakeholders interested in the same land. Farmers are worried about losing land to grow crops and thus their income. Conservationists are concerned about the dramatic loss of biodiversity, and energy producers want to build profitable PV power plants. Therefore, we must bring all stakeholders together to work out innovative and sustainable land-use strategies combining agriculture, biodiversity, and energy production. Agrivoltaic (Agri-PV) involves the use of land both for agriculture and solar energy generation. Such dual systems have been developed in recent years. So far, however, their potential to contribute to biodiversity and ecosystem services restoration has been rarely discussed. Our demonstrator aims to investigate an innovative and sustainable triple-use approach, called the AgriPVplus system, that combines crop production, solar energy generation, and biodiversity measures. Our measurement concept enables the investigation of energy yield measurements of different module technologies, different orientations to investigate the grid compatibility through vertical east-west installed bifacial PV modules, and the measurement of abiotic parameters such as photosynthetic active irradiance, soil temperature, and moisture to investigate the impact on the agriculture crops and biodiversity. This paper will show a novel measurement concept to demonstrate the interfaces between energy production, crop yield, and nature conservation.
Rainwater Management in Agrivoltaic Systems - Research and Development Potential
Creators: name: Rößner, J.V.
Publisher: name: WIP
Year: 2022
Subjects: PV Systems Engineering, Integrated/Applied PV
Infrastructure-integrated PV (I2PV) and Nature-inclusive PV (eco-PV); Vehicle Integrated PV (VIPV)

description: 8th World Conference on Photovoltaic Energy Conversion; 996-998
description: Agrivoltaics is a concept in which a piece of land is simultaneously used for both energy and food production by mounting photovoltaic modules at a certain height above (or in between strips of) agricultural land. A local and systemlevel incorporation of water management is imperative to the sustainable implementation of agrivoltaics. Water raining on the modules can be gathered and used for distinct purposes: groundwater recharge, crop irrigation, and cleaning and cooling of the PV modules. This research provides an initial overview of positive and negative impacts for each water use concept and outlines issues that should be taken into consideration and the potential for research and development. Various Managed Aquifer Recharge (MAR) technologies are a way to clean and store the water periodically in an underlying aquifer. Irrigation increases yield within the plant level and therefore increases the system’s output. Thanks to the power supply generated by the PV modules, high-tech irrigation systems can be implemented in agrivoltaic systems; the special adaption of irrigation systems to agrivoltaics poses significant potential for research and development. Meanwhile, the necessity, i.e., profitability of cleaning and/ or cooling PV modules depends on local environmental and economic factors. Several cleaning techniques have been developed to mitigate soiling, ranging from manual cleaning to fully automatic cleaning systems. In agrivoltaic systems, the soiling risk can increase. Semiautomatic systems seem to have the greatest potential for agrivoltaics, because they can be used with farming equipment. Multiple cooling techniques have been developed to decrease cell temperature to increase power output, with some of them involving water. Water flowing over the module surface is a promising cooling technique for agrivoltaic applications. Attaching a perforated tube to the upper edge, the entire module can be covered in a thin film of water which cools very effectively (while also cleaning the surface). A closed-circuit system could be created involving the technical components used for rainwater harvesting. The economic feasibility of cooling panels in agrivoltaic systems needs to be investigated. In certain locations, rainwater-harvesting could also be relevant for ground-mounted PV systems.
Analyses of a Virtual World
Creators: name: Holovatch, Yurij
name: Mryglod, Olesya
name: Szell, Michael
name: Thurner, Stefan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present an overview of a series of results obtained from the analysis of human behavior in a virtual environment. We focus on the massive multiplayer online game (MMOG) Pardus which has a worldwide participant base of more than 400,000 registered players. We provide evidence for striking statistical similarities between social structures and human-action dynamics in the real and virtual worlds. In this sense MMOGs provide an extraordinary way for accurate and falsifiable studies of social phenomena. We further discuss possibilities to apply methods and concepts developed in the course of these studies to analyse oral and written narratives.
description: 16 pages, 7 figures. To appear in: "Maths Meets Myths: Complexity-science approaches to folktales, myths, sagas, and histories." Editors: R. Kenna, M. Mac Carron, P. Mac Carron. (Springer, 2016)