cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Detection of ultra-weak magnetic fields in Am stars: beta UMa and theta Leo
Creators: name: Blazère, A.
name: Petit, P.
name: Lignières, F.
name: Aurière, M.
name: ballot, J.
name: Böhm, T.
name: Folsom, C. P.
name: Gaurat, M.
name: Jouve, L.
name: Ariste, A. Lopez
name: Neiner, C.
name: Wade, G. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An extremely weak circularly polarized signature was recently discovered in spectral lines of the chemically peculiar Am star Sirius A. A weak surface magnetic field was proposed to account for the observed polarized signal, but the shape of the phase-averaged signature, dominated by a prominent positive lobe, is not expected in the standard theory of the Zeeman effect. We aim at verifying the presence of weak circularly polarized signatures in two other bright Am stars, beta UMa and theta Leo, and investigating the physical origin of Sirius-like polarized signals further. We present here a set of deep spectropolarimetric observations of beta UMa and theta Leo, observed with the NARVAL spectropolarimeter. We analyzed all spectra with the Least Squares Deconvolution multiline procedure. To improve the signal-to-noise ratio and detect extremely weak signatures in Stokes V profiles, we co-added all available spectra of each star (around 150 observations each time). Finally, we ran several tests to evaluate whether the detected signatures are consistent with the behavior expected from the Zeeman effect. The line profiles of the two stars display circularly polarized signatures similar in shape and amplitude to the observations previously gathered for Sirius A. Our series of tests brings further evidence of a magnetic origin of the recorded signal. These new detections suggest that very weak magnetic fields may well be present in the photospheres of a significant fraction of intermediate-mass stars. The strongly asymmetric Zeeman signatures measured so far in Am stars (featuring a dominant single-sign lobe) are not expected in the standard theory of the Zeeman effect and may be linked to sharp vertical gradients in photospheric velocities and magnetic field strengths.
In memoriam Siegfried Gollub
Creators: name: Binsfeld, Wolfgang
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Analysis of Temperature Inertia of PV Modules Using Different Temperature Estimation Models
Creators: name: Vidal De Oliveira, A.K.
name: Braga, M.
name: Oh, S.-Y.
name: Dittmann, S.
name: Gottschalg, R.
name: Rodríguez-Gallegos, C.D.
name: Reindl, T.
name: Ettalbi, K.
name: Betts, T.R.
name: Burnham, L.
name: Rüther, R.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1269-1274
description: Module temperature is one of the main factors that directly influence photovoltaic energy production, and therefore, its precise modelling is of foremost relevance. However, most of the temperature models in the literature fail to acknowledge the transient effect due to the heat capacity of the PV module, as they instead model the temperature based on the steady-state condition. This paper addresses these modeling weaknesses by comparing two wellestablished steady-state methods (the so-called Ross and Faiman models) with the Oh et al. model, which includes the transient effect of the heat capacity of PV modules in its calculations. Results show that the Oh et al. model provides more accurate results for high-resolution data when compared to steady-state models. The results are even more precise when using it to calculate the module temperature using the measurement from the previous time step, which indicates that the model could be used to forecast module temperature for a time step in the future. Across all models, climate is a major factor affecting model accuracy, what demonstrates the importance of the analysis of the impact of different site conditions on PV modeling and on the selection of models that are best matched to specific climates.
The Potential of the Rejected Brine as a Coolant for PV Temperature Reduction Purposes
Creators: name: Kamfiroozi, S.
name: Ebadi, H.
name: Vahabi, H.
name: Talebnejad, R.
name: Savoldi, L.
name: Sepaskhah, A.R.
name: Ghobadian, B.
name: Gorjian, S.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1255-1258
description: From the working principles of PV cells, only half of the received solar spectrum (with a wavelength of 200-800 nm) is utilized for energy conversion and the remaining portion (800-3000 nm) heats the panels, decreasing the electric efficiency. To avoid such sacrifices in performance, which could expand the economic concerns and shortening PV’s lifetime, scientists have proposed various cooling mechanisms. In this study, an experimental investigation has been performed on a stand-alone PV-powered RO system to assess the electrical and thermal performance of the solar system and study the influence of the rejected brine as a coolant for PV panels. The main scope is to use brine not only for increasing the performance of solar panels by cooling effect but also for eliminating the energy needed for pumping through the utilization of the output pressure of the RO membranes. The experimental results indicated that the application of brine cooling can improve the PV efficiency from 1 to 3% depending on the feeding temperature and salinity levels.
Inhalt des 47. Jahrgangs
Creators: name: Redaktion, Die
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Impact of digital currencies on small and growing economies.
Creators: name: Kumar, Dibyanshu
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440404
subject: Political economy and social change
classificationCode: 380102
subject: Behavioural economics
classificationCode: 380107
subject: Financial economics
classificationCode: 350202
subject: Finance
classificationCode: 350203
subject: Financial econometrics
classificationCode: 380203
subject: Economic models and forecasting

description: This paper examines the impact of digital currencies on emerging economies, with India and Kenya as key case studies. As digital currencies gain global importance, the study explores their effects on these developing regions, focusing on historical evolution, regulatory landscapes, and adoption rates. It highlights the role of technological infrastructure, economic factors, and socio-political conditions in driving adoption, while addressing challenges like regulatory hurdles and financial stability risks. The research also identifies opportunities for enhancing financial inclusion and economic growth, offering tailored policy recommendations and insights into how digital currencies could reshape economic landscapes in developing regions.
Lower limit for differential rotation in members of young loose stellar associations
Creators: name: Distefano, E.
name: Lanzafame, A. C.
name: Lanza, A. F.
name: Messina, S.
name: Spada, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Surface differential rotation (SDR) plays a key role in dynamo models. SDR estimates are therefore essential for constraining theoretical models. We measure a lower limit to SDR in a sample of solar-like stars belonging to young associations with the aim of investigating how SDR depends on global stellar parameters in the age range (4-95 Myr). The rotation period of a solar-like star can be recovered by analyzing the flux modulation caused by dark spots and stellar rotation. The SDR and the latitude migration of dark-spots induce a modulation of the detected rotation period. We employ long-term photometry to measure the amplitude of such a modulation and to compute the quantity DeltaOmega_phot =2p/P_min -2pi/P_max that is a lower limit to SDR. We find that DeltaOmega_phot increases with the stellar effective temperature and with the global convective turn-over time-scale tau_c. We find that DeltaOmega_phot is proportional to Teff^2.18pm 0.65 in stars recently settled on the ZAMS. This power law is less steep than those found by previous authors, but closest to recent theoretical models. We find that DeltaOmega_phot steeply increases between 4 and 30 Myr and that itis almost constant between 30 and 95 Myr in a 1 M_sun star. We find also that the relative shear increases with the Rossby number Ro. Although our results are qualitatively in agreement with hydrodynamical mean-field models, our measurements are systematically higher than the values predicted by these models. The discrepancy between DeltaOmega_phot measurements and theoretical models is particularly large in stars with periods between 0.7 and 2 d. Such a discrepancy, together with the anomalous SDR measured by other authors for HD 171488 (rotating in 1.31 d), suggests that the rotation period could influence SDR more than predicted by the models.
description: 23 pages, 15 figures, 5 tables,accepted by Astronomy and Astrophysics
Influence of Shading on Photovoltaic Generation from Winter to Summer in Vanderbijlpark, South Africa
Creators: name: Bekker, J.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1259-1263
description: This paper presents effects and influences due to shading on solar panels installed as part of a solar system at a residential house in Vanderbijlpark, South Africa. Design considerations include the choice of inverter, solar panels as well as the arrangement and mounting of the solar panels. Results presented illustrate the effect of the shading for different scenarios from winter to summer conditions. Emphasis is placed on the difference of the solar path of the sun, resulting in different shading conditions. These results are in the form of data captured for electricity generation by the solar array, and graphical representation thereof.
The Effect of Organizational Commitment on Employees' Turnover Intention: In the Case of Ethiopian Trading Business Corporation (Alle Bejimla)
Creators: name: Megfira, Adem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: There is a growing interest in theory and practice with regard to organizational commitment and Turnover intention of employees. The Objective of this thesis is to study the effect of organizational commitment on Turnover intention; specifically, to assess the effect the Affective commitment, Normative commitment, and continuance commitment on Employee's Turnover intention. A quantitative research design that involves quantifying of the variables of the study by way of generating numerical data was adopted. From the total of 272 employees within the case organization i.e. Alle Bejimla, a closed ended questionnaire was distributed for a sample of 162 employees selected using convenient sampling. Where 143 responses were collected and used for final data analysis. The data collected from the questionnaire were analyzed using descriptive statistics, correlation and regression analysis with the help of IBM's Software Package for Social Science (IBM SPSS Statistic 20). The outcome of the analysis revealed that organizational commitment at the 1st order level construct is negatively related to turnover intention. Furthermore, while all three dimensions of commitment have a negative relationship to the dependent variable i.e. turnover intention; affective commitment was found to have a strong negative relationship with turnover intention while the other two had a moderate negative relationship. The study recommends that organizations should emphasis on minimizing the high level of turnover intention by engaging and committing the employees for better productivity.
Titelei
Creators: name: Redaktion, Die
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
On the universality of the $J=0$ fixed pole contribution in DVCS
Creators: name: Müller, Dieter
name: Semenov-Tian-Shansky, Kirill M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: S. Brodsky, F.J. Llanes-Estrada, and A. Szczepaniak formulated the $J=0$ fixed pole universality hypothesis for (deeply) virtual Compton scattering. We show that in the Bjorken limit this hypothesis is equivalent to the validity of the inverse moment sum rule for the $D$-term form factor. However, any supplementary $D$-term added to a generalized parton distribution (GPD) results in an additional $J=0$ fixed pole contribution that violates universality. Unfortunately, one can not provide any reliable theoretical argument excluding the existence of such supplementary $D$-term. Moreover, the violation of $J=0$ fixed pole universality was revealed in field theoretical GPD models. Therefore, $J=0$ fixed pole universality hypothesis remains just an external assumption and probably will never be proven theoretically.
description: Talk 6 pages, 1 figure, contribution to the 6th International Conference on Physics Opportunities at an EleCtron-Ion Collider (POETIC 2015)
Nega-$\tilde Q$-representation of real numbers
Creators: name: Serbenyuk, Symon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: The article is devoted to modeling of the nega-$\tilde Q$-representation of real numbers. The representation is a generalization of representation by alternating Cantor series and positive $\tilde Q$-representation is a generalization of representation of real numbers by the positive Cantor series. Analytic and geometric approach are used for modeling of nega-$\tilde Q$-representation. Advantages and disadvantages of these approaches are investigated, the representation is modeled. The investigation was represented in seminar on fractal analysis of Institute of Mathematics of the National Academy of Sciences of Ukraine on, October 30, 2014 (http://www.imath.kiev.ua/events/index.php?seminarId=21&archiv=1) and International Conference "Probability, Reliability and Stochastic Optimization", Kyiv, April 7-10, 2015.
description: in Ukrainian. One can to familiarize with some results of Symon Serbenyuk that it were published in Trans. Dragomanov Nat. Pedagogical Univ. Ser. 1, Physics and Mathematics, for positive (http://fmi.npu.edu.ua/images/files/publications/naukchasopys1/NZ2013_14.pdf, p. 253-267) and alternating Cantor series (http://fmi.npu.edu.ua/images/files/publications/naukchasopys1/NZ2013_15.pdf, p. 168-187)
Bifacial Gain for 1P and 2P Trackers
Creators: name: Merodio, P.
name: Martinez-Moreno, F.
name: Lorenzo, E.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1245-1249
description: We investigate the energy gain driven by bifaciality in PV plants designed for trackers in 1P (Portrait) and 2P configurations. For that purpose, three elements have been experimentally analyzed: 1) The rear shading caused by the tracker’s mounting system (torque tube and panel rails). This is characterized by the so-called Structure Shading Factor, SSF, defined as the share of rear irradiance that is obstructed by the structure -an input parameter required by PV software (SISIFO, PVsyst...) for energy yield estimations-. 2) The mismatch losses on the electric power delivered by the PV array due to the non-uniformity of the rear irradiance. This non-uniformity is partly due to the nature of the radiation reflected by the ground and partly to the shading caused by the tracking structure. Mismatch loses are characterized by a factor, MML, which quantifies either the total power reduction delivered by the PV array or just the power reduction corresponding to the rear irradiance. 3) The solar cell operation temperature. We paid especial attention to analyze the temperature differences between East and West module rows in the 2P tracker, compared to the temperature of the modules in the 1P tracker.
GPS/CSS radio sources and their relation to other AGN
Creators: name: Sadler, Elaine M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We are entering a new era of sensitive, large-area and multi-frequency radio surveys that will allow us to identify Gigahertz-Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources over a wide range in radio luminosity and study them within the context of the overall radio-source populations to which they belong. 'Classical' GPS/CSS objects are extremely luminous radio sources with a compact double morphology, commonly thought to represent the earliest stages in the life cycle of powerful radio galaxies (e.g. O'Dea 1998). It is now becoming easier to identify GPS/CSS candidates with much lower radio luminosity - particularly in the nearby Universe. These less powerful objects, with typical 1.4 GHz radio luminosities of $10^{23}$ to $10^{25}$ W/Hz, include peaked-spectrum radio sources with a core-jet morphology on parsec scales as well as high-frequency GPS-like peaked components embedded within lower-frequency extended emission. In the latter case, the presence of a young GPS component may not be evident from low-frequency data alone. Many radio galaxies in the local Universe have a compact (FR-0) morphology, and appear to lack extended radio emission on kiloparsec scales. The relationship of these FR-0 objects to the classical GPS/CSS radio sources remains unclear - some of them may represent short-lived episodes of AGN activity that will not lead to an extended FR-1 or FR-2 radio galaxy. Future wide-band radio surveys will shed more light on this - such surveys should ideally be coordinated to cover the full frequency range from 100 MHz to 100 GHz in order to sample all stages of GPS/CSS evolution in an unbiased way.
description: 9 pages, 11 figures, 1 table. Accepted for publication in Astronomische Nachrichten. Review presented at the 5th Workshop on CSS and GPS radio sources, held in Rimini (Italy) in May 2015
Ageing of Two 5kW PV Arrays at the IES-UPM after 8 Years of Operation
Creators: name: Martinez-Moreno, F.
name: Rossa, C.
name: Merodio, P.
name: Fialho, L.
name: Tuytyundzhiev, N.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1250-1254
description: This work analyses the degradation of two 5 kW PV arrays which are located on the roof of the Campus Sur of the Universidad Politécnica de Madrid. These systems were installed in March 2013 and they have been continuously monitored while they have been injecting power into the grid, storing at the same time its DC power and the operation conditions (effective irradiance and cell temperature). These variables allow to calculate their power at Standard Test Conditions over time and, consequently, the degradation rate for each PV array in these 8 years of operation. The linear degradations obtained are similar to the ones presented by other authors, but we have found that there is not apparent degradation in the first years of operation. Besides, it seems that shading could increase the degradation rates. These figures and phenomena can be useful for a better understanding of the actual behavior of PV systems in order to obtain more accurate energy predictions.
Modeling a Pothovoltaic Fault Detection Approach Considering Machine Learning for the EU PVSEC 2021
Creators: name: Akharath, P.
name: Altkrüger, J.
name: Sahota, H.
name: Herbort, V.
name: Te Heesen, H.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1234-1237
description: Photovoltaics play a central role in transforming the global energy system into an emission-free energy supply. For example, about 1.8 million installed photovoltaic roof systems in Germany with a nominal output of up to 30 kWp contribute to electrical power generation. Nevertheless, especially in this class of plants, it is evident that technical malfunctions can occur due to a lack of remote monitoring of electricity production and insufficient quality assurance concepts, resulting in a reduction of the yield of these photovoltaic plants [1,2,3]. So far, manual methods have been used to detect such anomalies for unlabeled data; machine learning concepts can provide an automated and adaptive alternative. For this purpose, the time and memory saving anomaly detection approach of Isolation Forests is applied. The results are compared to the ground truth provided by a manual method introduced by Leloux et al. [4]. This evaluation reveals that the approach of Isolation Forest can correctly evaluate the functionality of a plant. Nevertheless, a high rate of undetected anomalies could be caused by a misjudgment by the Ground Truth or the Isolation Forest. Therefore, it must be manually assessed until labeled data is available.
title: Ð¥Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸ ÑÐ¾ÑÐ¸Ð¾ÐºÑÐ»ÑÑÑÑÐ½Ð¾Ð¹ Ð°Ð´Ð°Ð¿ÑÐ°ÑÐ¸Ð¸ Ð°ÑÐ°Ð±ÑÐºÐ¸Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð² Ð¿ÑÐ¾ÑÐµÑÑÐµ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ Ð½Ð° Ð¿ÑÐµÐ´Ð²ÑÐ·Ð¾Ð²ÑÐºÐ¾Ð¼ ÑÑÐ°Ð¿Ðµ
title: Characteristics of Arab students sociocultural adaptation in the process of studying at pre-university stage
Creators: name: ÐÑÐºÐ±Ð¸Ð»Ñ, ÐÐ°Ð½ÑÑÑ
name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾. ÐÑÑÑÐ°Ñ ÑÐºÐ¾Ð»Ð° Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÑ  Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÑ  Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼
name: "ÐÐµÐ´ÐµÐ»Ñ Ð½Ð°ÑÐºÐ¸ ÐÑÑÑÐµÐ¹ ÑÐºÐ¾Ð»Ñ Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÑ  Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÑ  Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼", Ð½Ð°ÑÑÐ½Ð°Ñ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ Ñ Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÐ¼ ÑÑÐ°ÑÑÐ¸ÐµÐ¼ (2023; Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³)
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2023
Subjects: Ð°ÑÐ°Ð±ÑÐºÐ¸Ðµ ÑÑÑÐ´ÐµÐ½ÑÑ
ÐÐ»Ð¸Ð¶Ð½Ð¸Ð¹ ÐÐ¾ÑÑÐ¾Ðº
ÑÐ¾ÑÐ¸Ð¾ÐºÑÐ»ÑÑÑÑÐ½Ð°Ñ Ð°Ð´Ð°Ð¿ÑÐ°ÑÐ¸Ñ
ÑÑÐµÐ±Ð½Ð°Ñ ÐºÐ¾Ð¼Ð¼ÑÐ½Ð¸ÐºÐ°ÑÐ¸Ñ
Ð¿ÐµÐ´Ð°Ð³Ð¾Ð³Ð¸ÑÐµÑÐºÐ°Ñ Ð¿Ð¾Ð´Ð´ÐµÑÐ¶ÐºÐ° Ð°Ð´Ð°Ð¿ÑÐ°ÑÐ¸Ð¸
Arab students
Middle East
sociocultural adaptation
educational communication
pedagogical support for adaptation

description: Ð ÑÑÐ°ÑÑÐµ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÑÑÑÑ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ñ ÑÐ¾ÑÐ¸Ð¾ÐºÑÐ»ÑÑÑÑÐ½Ð¾Ð¹ Ð°Ð´Ð°Ð¿ÑÐ°ÑÐ¸Ð¸ Ð°ÑÐ°Ð±ÑÐºÐ¸Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð², ÐºÐ¾ÑÐ¾ÑÑÐµ ÑÑÐ°Ð»ÐºÐ¸Ð²Ð°ÑÑÑÑ Ñ ÑÑÐ´Ð¾Ð¼ ÑÑÑÐ´Ð½Ð¾ÑÑÐµÐ¹ Ð¸Ð·-Ð·Ð° Ð½ÐµÐ¿Ð¾Ð½Ð¸Ð¼Ð°Ð½Ð¸Ñ Ð¸ Ð½ÐµÐ¿ÑÐ¸Ð½ÑÑÐ¸Ñ ÑÐ¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð³Ð¾ Ð¾Ð±ÑÐ°Ð·Ð° Ð¶Ð¸Ð·Ð½Ð¸, Ð¾Ð±ÑÑÐ°ÐµÐ² Ð¸ ÑÑÐ°Ð´Ð¸ÑÐ¸Ð¹. ÐÑÐ¸Ð½Ð°Ð´Ð»ÐµÐ¶Ð½Ð¾ÑÑÑ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ðº ÑÐ¾Ð¹ Ð¸Ð»Ð¸ Ð¸Ð½Ð¾Ð¹ Ð½Ð°ÑÐ¸Ð¸ Ñ ÐµÐµ Ð´ÑÑÐ¾Ð²Ð½Ð¾Ð¹ ÑÑÑÑÐºÑÑÑÐ¾Ð¹ Ð¸ ÑÐ¾ÑÐ¸Ð¾ÐºÑÐ»ÑÑÑÑÐ½ÑÐ¼Ð¸ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ°Ð¼Ð¸ ÑÑÐµÐ±ÑÐµÑ Ð½Ð° Ð¸Ð½Ð´Ð¸Ð²Ð¸Ð´ÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ Ð¿ÐµÐ´Ð°Ð³Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð° Ð² Ð¿ÑÐµÐ¿Ð¾Ð´Ð°Ð²Ð°Ð½Ð¸Ð¸ ÑÑÑÑÐºÐ¾Ð³Ð¾ ÑÐ·ÑÐºÐ° ÐºÐ°Ðº Ð¸Ð½Ð¾ÑÑÑÐ°Ð½Ð½Ð¾Ð³Ð¾, Ð° ÑÐ°ÐºÐ¶Ðµ Ð´ÑÑÐ³Ð¸Ñ Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½.
description: The article discusses the principles of sociocultural adaptation of Arab students, who face a number of difficulties due to misunderstanding and non-acceptance of the Russian way of life, customs and traditions. The studentsâ belonging to a particular nation with its spiritual structure and sociocultural characteristics counts on the individuality of the pedagogical approach in teaching Russian as a foreign language, as well as other subjects.
Effects of the Biggest Snowfall of a Century in Madrid, on the Electricity Generation of Portrait Versus Landscape Layout Solar Panels
Creators: name: Muñoz-García, M.A.
name: Moreda, G.P.
name: Alonso-García, M.C.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1238-1240
description: On January 8th and 9th 2021, a historical snowfall occurred in Madrid. It caused severe mobility disruption in the city due to the lack of preparation for phenomena of such magnitude, and it affected the production of rooftop photovoltaic (PV) plants like the one discussed here. The fact that some of the PV panels in this PV plant are arranged vertically (portrait), caused the complete shading of their lower cells. This canceled the whole panel electricity production during snow-induced shading of those cells. When analyzing solar radiation, a drastic drop in production was observed.
The psychological experience of second-generation Somalis whose parents were forced to migrate during the civil war in the '90s
Creators: name: Kumaga, Raisa
Publisher: name: University of East London
Year: 2023
Subjects: Somalia
Forced Migration
psychosocial factors
second-generations
parental-child relations
intergenerational patterns
psychological wellbeing

description: In the 1990s, millions of Somali families were forced by a civil war to leave their homes. Over the years, other refugee communities have been researched by scholars in light of intergenerational trauma (Sangalang & Vang, 2017). Second-generation Somali psychological experiences are multi-layered and not reduced to a directional process of intergenerational trauma because their lived experiences are also situated in the post-colonial world. This study explores the psychological experience by including psychological distress experienced and strengths displayed by second-generation Somalis whose parents were forced to migrate to the United Kingdom during the conflict. Understanding the psychological needs of the second-generation in forced migration supports the move away from the individualised model to the historical and familial context. The study adopts a constructivist epistemology and Africana phenomenological approach and uses interpretative phenomenological analysis (Smith, 2009) to reveal the psychological experience. There are four superordinate themes in this study, which include: emotional responses to the forced migration background of parents, ‘flipping hats’ the emotional depth of racism and belonging, ‘hush and silence’ hiding the self and strength and togetherness despite the rift across the community. The second-generation Somalis’ psychological experience is intersubjective. This study reveals the dynamic process of the second-generation sense of self while relating to and experiencing the oppression and suffering of their parents'. This study aims to contribute to the field of applied psychology and counselling psychology by elucidating the subjective experience of second-generation Somalis in order to inform theory and practice regarding this specific population. The study’s findings also contribute new information to the debate on the future generations of refugee families and mental health to develop appropriate community services for their needs.
Regge spectra of excited mesons, harmonic confinement and QCD vacuum structure
Creators: name: Nedelko, Sergei N.
name: Voronin, Vladimir E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An approach to QCD vacuum as a medium describable in terms of statistical ensemble of almost everywhere homogeneous Abelian (anti-)self-dual gluon fields is briefly reviewed. These fields play the role of the confining medium for color charged fields as well as underline the mechanism of realization of chiral $SU_{\rm L}(N_f)\times SU_{\rm R}(N_f)$ and $U_A(1)$ symmetries. Hadronization formalism based on this ensemble leads to manifestly defined quantum effective meson action. Strong, electromagnetic and weak interactions of mesons are represented in the action in terms of nonlocal $n$-point interaction vertices given by the quark-gluon loops averaged over the background ensemble. New systematic results for the mass spectrum and decay constants of radially excited light, heavy-light mesons and heavy quarkonia are presented. Interrelation between the present approach, models based on ideas of soft wall AdS/QCD, light front holographic QCD, and the picture of harmonic confinement is outlined.
description: 27 pages, 18 figures; corrected caption for fig. 10
Study of the performance of a compact sandwich calorimeter for the instrumentation of the very forward region of a future linear collider detector
Creators: name: Ghenescu, V.
name: Benhammou, Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The FCAL collaboration is preparing large scale prototypes of special calorimeters to be used in the very forward region at a future linear electron positron collider for a precise and fast luminosity measurement and beam-tuning. These calorimeters are designed as sensor-tungsten calorimeters with very thin sensor planes to keep the Moliere radius small and dedicated FE electronics to match the timing and dynamic range requirements. A partially instrumented prototype was investigated in the CERN PS T9 beam in 2014 and at the DESY-II Synchrotron in 2015. It was operated in a mixed particle beam (electrons, muons and hadrons) of 5 GeV from PS facilities and with secondary electrons of 5 GeV energy from DESY-II. The results demonstrated a very good performance of the full readout chain. The high statistics data were used to study the response to different particles, perform sensor alignment and measure the longitudinal shower development in the sandwich. In addition, Geant4 MC simulations were done, and compared to the data.
description: Presented at the 14th Vienna conference on Instrumentation, Feb 15-19, 2016, 11 pages and 14 figures
Challenges of Ethiopian Honey Export across the Honey Value Chain and Trends of Ethiopian Honey Production and Export
Creators: name: Hadera, Gebru
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The study was conducted to identify the challenges of Ethiopian honey export across the honey value chain and to establish trends of the Ethiopian honey production, honey export volume and honey export value. In the study a descriptive research type was adopted and the sampling technique used was non-probability- purposive sampling technique. A sample size of 10 Ethiopian honey exporting firms was used. The data collection method used was a questionnaire method and descriptive analysis was applied to analyze the data. The study examined the input supply function, production function and domestic honey marketing function of the honey value chain and has identified the honey export challenges prevailing at the function levels. At the input supply function level, inadequate supply of improved beekeeping equipment is the challenge identified. At the production function level, low honey production and productivity, inadequate use of improved beekeeping equipment, low quality honey, drought, and seasonality of honey production and poor honey harvesting method are the identified challenges. At the domestic honey marketing function level, poor market infrastructure, lack of organized market, lack of legality, adulteration and smuggling are identified. The findings indicate that these market problems led to inadequate supply and quality of honey for export, high domestic honey price and less competitiveness in the global honey market. The study has also examined support functions in the chain. Absence of mandatory honey standard and lack of internationally accredited laboratory in Ethiopia, weak regulation, absence of permanent vertical and horizontal linkage platforms for chain actors, poor extension and inadequate financial credit services are identified as challenges. The analysis of the secondary data showed that the trend of Ethiopian annual honey production showed an annual average rate of growth of 1% during 2011-2018. The trends of the Ethiopian honey export volume and honey export value showed an annual average rates of decline of 57% and 52% respectively during the same period. The findings of the study revealed that the Ethiopian honey export challenges are wide ranging and interlinked and need to be addressed holistically. The study recommends promotion of export oriented honey production, strengthening beekeeping input production and supply, adoption of export oriented beekeeping extension package and establishment of honey belt areas to enhance the Ethiopian honey export. The study also recommends, Ethiopia to have mandatory honey standard, strengthen existing regulation and bridge regulation gaps, strong beekeeping extension and financial credit services and establishment of permanent horizontal and vertical linkage platforms for honey value chain actors.
Point Island Models for Nucleation and Growth of Supported Nanoclusters during Surface Deposition
Creators: name: Han, Y.
name: Gaudry, E.
name: Oliveira, T. J.
name: Evans, J. W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Point island models (PIMs) are presented for the formation of supported nanoclusters (or islands) during deposition on flat crystalline substrates at lower submonolayer coverages. These models treat islands as occupying a single adsorption site, although carrying a label to track their size (i.e., they suppress island structure). However, they are particularly effective in describing the island size and spatial distributions. In fact, these PIMs provide fundamental insight into the key features for homogeneous nucleation and growth processes on surfaces. PIMs are also versatile being readily adapted to treat both diffusion-limited and attachment-limited growth, and also a variety of other nucleation processes with modified mechanisms. Their behavior is readily and precisely assessed by kinetic Monte Carlo simulation.
description: 27 pages, 13 figures
Analysis of the relationship between promotional mix elements and performance of pharmaceutical companies in Addis Ababa
Creators: name: Redyet, Nigussie
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The purpose of the study was to analyze the relationship between promotional mix elements and performance of pharmaceutical companies in Addis Ababa. The study employed descriptive survey design and population consisted of all pharmaceutical product importers in Addis Ababa. Simple random sampling technique was employed to select the sample. Data was collected from the respondents using structured questionnaires and analyzed using descriptive statistics and statistical Package for Social Sciences (SPSS).The findings indicated that personal selling, sales promotion, advertising, public relation and direct marketing jointly explained 20.7% of variance in overall performance. Personal selling, advertising and public relation had a significant and positive effect on overall performance of a company. The control variable age had a significant but negative effect on overall company performance. The study concluded that promotional mix elements had a great effect on performance of a company. It was recommended Food, Medicines, and Health care administration and Control Authority (FMHACA) could revise tight regulation in promotion of pharmaceutical products. Therefore, marketing practices of pharmaceutical companies based on personal selling, advertising and public relations should be given attention for their future enhanced performance.
$\bf p$-$\bf p$ minimum-bias dijets and nonjet quadrupole in relation to conjectured collectivity (flows) in high-energy nuclear collisions
Creators: name: Trainor, Thomas A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent observations of ridge-like structure in $p$-$p$ and $p$-$A$ angular correlations at the RHIC and LHC have been interpreted to imply collective motion in smaller collision systems. It is argued that if correlation structures accepted as manifestations of flow in $A$-$A$ collisions appear in smaller systems collectivity (flow) must extend to the smaller systems. But the argument could be reversed to conclude that such structures appearing in $A$-$A$ collisions may not imply hydrodynamic flow. I present spectrum, correlation and fluctuation data from RHIC $p$-$p$ and Au-Au collisions and $p$-$p$, $p$-Pb and Pb-Pb results from the LHC described accurately by a two-component (soft+dijet) model of hadron production. I also present evidence for a significant $p$-$p$ nonjet (NJ) quadrupole ($v_2$) component with $n_{ch}$ systematics directly related to $A$-$A$ NJ quadrupole systematics. The combination suggests that soft, dijet and NJ quadrupole components are distinct phenomena in all cases, inconsistent with hadron production from a common bulk medium exhibiting collective motion (flow).
description: 6 pages, 5 figures, prepared for XLV ISMD 2015
Neutralino Pair Production at the Photon-Photon Collider for the $\tildeτ$-Coannihilation Scenario
Creators: name: Sonmez, Nasuf
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Supersymmetry (SUSY) is a theory that gives an explanation for the strong and electroweak interactions from the grand unification scale down to the weak scale. The search for supersymmetric particles still continues at full speed at the LHC without success. The main tasks at the ILC is complementing the LHC result and also search for new physics. In this study, the neutralino pair production via photon-photon collision is studied for the $\tilde{t}$-coannihilation scenario in the context of MSSM at the ILC. In the calculation, all the possible one-loop diagrams are taken into account for the photon-photon interaction. We present the production cross section and distribution of various observables for the lightest and next-to-lightest neutralino pairs for benchmark models which are specifically presented in the light of LHC8 data analysis, employing these benchmark models for neutralino pair production could show the potential of the ILC concerning the dark matter searches in supersymmetry.
description: 5 pages, 4 figures
Soiling and Snow Impact on a PV Plant at a Farm in Norway
Creators: name: Riise, H.N.
name: Øgaard, M.B.
name: Nærland, T.U.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1241-1244
description: Soiling of solar cell modules may impact the energy yield of a PV installation significantly. Although soiling losses are frequently reported in regions known for high soiling, the soiling impact on PV production in regions where soiling losses are expected to be limited, such as Norway, is rarely reported. On the other hand, point emission sources can increase the soiling at a site, and in this work, agricultural activity at a farm in Norway is correlated with the soiling levels experienced by a PV plant on the farmhouse roof. Soiling rates are determined from on-site measurements and estimated through analyzing the performance of the plant. Additionally, the energy loss from soiling and snow, respectively, are determined. The energy loss from soiling is quantified to 3.8 kWh/kWp/yr (~0.41 % of annual production), pointing to negligible soiling loss in Norway even in the presence of a point emission source. Energy loss from snow is estimated to 20.2 kWh/kWp/yr (~2.2 % of annual production), indicating that snow loss is more a more significant loss factor.
On universal decoherence under gravity: a perspective through the Equivalence Principle
Creators: name: Pang, B.
name: Khalili, F. Y.
name: Chen, Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In Nature Phys. 11, 668 (2015) (Ref. [1]), a composite particle prepared in a pure initial quantum state and propagated in a uniform gravitational field is shown to undergo a decoherence process at a rate determined by the gravitational acceleration. By assuming Einstein's Equivalence Principle to be valid, we demonstrate, first in a Lorentz frame with accelerating detectors, and then directly in the Lab frame with uniform gravity, that the dephasing between the different internal states arise not from gravity but rather from differences in their rest mass, and the mass dependence of the de Broglie wave's dispersion relation. We provide an alternative view to the situation considered by Ref. [1], where we propose that gravity plays a kinematic role in the loss of fringe visibility by giving the detector a transverse velocity relative to the particle beam; visibility can be easily recovered by giving the screen an appropriate uniform velocity. We finally propose that dephasing due to gravity may in fact take place for certain modifications to the gravitational potential where the Equivalence Principle is violated.
description: 5 pages, 3 figures
Thermal characteristics of a B8.3 flare observed on July 04, 2009
Creators: name: Awasthi, Arun Kumar
name: Sylwester, Barbara
name: Sylwester, Janusz
name: Jain, Rajmal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We explore the temporal evolution of flare plasma parameters including temperature (T) - differential emission measure (DEM) relationship by analyzing high spectral and temporal cadence of X-ray emission in 1.6-8.0 keV energy band, recorded by SphinX (Polish) and Solar X-ray Spectrometer (SOXS; Indian) instruments, during a B8.3 flare which occurred on July 04, 2009. SphinX records X-ray emission in 1.2-15.0 keV energy band with the temporal and spectral cadence as good as 6 microsecond and 0.4 keV, respectively. On the other hand, SOXS provides X-ray observations in 4-25 keV energy band with the temporal and spectral resolution of 3 second and 0.7 keV, respectively. We derive the thermal plasma parameters during impulsive phase of the flare employing well-established Withbroe-Sylwester DEM inversion algorithm.
description: To Appear in the International Astronomical Union#320 Proceedings Series, 2015
Solar Photovoltaic Power Plant Inventory and Solar Modules Counting by Convolutional Neural Network from Aerial Imagery
Creators: name: Lin, Y.-R.
name: Huang, C.-Y.
name: Zhang, J.-S.
name: Chen, H.-L.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1227-1229
description: Taiwan is an island located in the subtropics and near the Pacific Ocean, as a result, Taiwan is hit by typhoons almost every summer. Solar photovoltaic power plants suffer from storm damage and parts of solar panels could be lost. Nowadays, Taiwan is committed to promoting installations of solar photovoltaic plants. However, the government doesn’t verify those existing plants are completeness or not. In this work, Aerial imagery or highresolution satellite imagery are used to take inventory of photovoltaic systems. A training model for PV plants detection is set up by CNN (Convolutional Neural Network). After capturing the region of PV plants, a counting method, a consequent image processing techniques, is applied to count the amount of solar panels. By clarifying the amount of solar modules, those would be compared with the original information. A successful case at Liujia in Tainan verifying the counting method, the recognition rate has reach over 98%.
Comparison of Soiling Loss Between Framed and Frameless Photovoltaic Modules
Creators: name: Karakan, H.
name: Ceyran, H.A.
name: Yazici, A.
name: Günöven, M.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1230-1233
description: Soiling rates of framed and frameless modules varies due to their design differences. To examine the soiling rate, successive outdoor tests have been conducted on extensively soiled module strings before and after cleaning. The power output of these framed and frameless module strings in horizontal or tilted positions were measured using a portable I-V tester. The horizontal irradiance has also been measured simultaneously using a reference cell. After normalizing the power measurements with respect to incident irradiance and rated module power, the loss in power due to soiling was found to be in average 11% higher for framed modules than for frameless modules. This can be explained by a longer dust and dried slurry deposition, extending from the module edge towards the first string of cells in framed modules. This comparative performance loss of framed modules due to soiling is less pronounced for tilted modules.
Full Gradient Stabilized Cut Finite Element Methods for Surface Partial Differential Equations
Creators: name: Burman, Erik
name: Hansbo, Peter
name: Larson, Mats G.
name: Massing, André
name: Zahedi, Sara
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N12, 65N30, 65N85

description: We propose and analyze a new stabilized cut finite element method for the Laplace-Beltrami operator on a closed surface. The new stabilization term provides control of the full $\mathbb{R}^3$ gradient on the active mesh consisting of the elements that intersect the surface. Compared to face stabilization, based on controlling the jumps in the normal gradient across faces between elements in the active mesh, the full gradient stabilization is easier to implement and does not significantly increase the number of nonzero elements in the mass and stiffness matrices. The full gradient stabilization term may be combined with a variational formulation of the Laplace-Beltrami operator based on tangential or full gradients and we present a simple and unified analysis that covers both cases. The full gradient stabilization term gives rise to a consistency error which, however, is of optimal order for piecewise linear elements, and we obtain optimal order a priori error estimates in the energy and $L^2$ norms as well as an optimal bound of the condition number. Finally, we present detailed numerical examples where we in particular study the sensitivity of the condition number and error on the stabilization parameter.
description: 20 pages, 4 figures, 5 tables. arXiv admin note: text overlap with arXiv:1507.05835