COMPARATIVE STUDIES OF ELECTRICITY PRODUCTION USING PHOTOVOLTAIC SYSTEMS INSTALLED ON DIFFERENT TYPES OF ROOFS

2017 ◽  
Author(s):  
Daniela GIOSANU
Keyword(s):  
Comparative Studies ◽  
Electricity Production ◽  
Photovoltaic Systems ◽  
Different Types

Do Development and Democracy Positively Affect Gender Equality in Cabinets?

2015 ◽  
Vol 16 (3) ◽  
pp. 332-356 ◽  
Author(s):  
JOHN HÖGSTRÖM
Keyword(s):  
Economic Development ◽  
Gender Equality ◽  
Empirical Evidence ◽  
Comparative Studies ◽  
Developed Countries ◽  
Political Regimes ◽  
The World ◽  
Different Types ◽  
Negative Effect ◽  
Positive Effect

AbstractIt has been argued that economic development and democracy create new opportunities and resources for women to access political power, which should increase gender equality in politics. However, empirical evidence from previous research that supports this argument is mixed. The contribution of this study is to expand the research on gender equality in politics through an in-depth examination of the effect of development and democracy on gender equality in cabinets. This has been completed through separate analyses that include most of the countries in the world across three levels of development (least-developed, developing, and developed) and across different types of political regimes (democracies, royal dictatorships, military dictatorships, and civilian dictatorships). The results demonstrate that economic development and democracy only affect gender equality in cabinets positively in a few environments. Accordingly, the context is important and there seem to be thresholds before development and democracy have any effect. Development has a positive effect in developed countries and in democracies, but it has a negative effect in dictatorships, and the negative effect is strongest in military dictatorships. The level of democracy has a positive effect mainly in dictatorships, and the strongest effect is in civilian dictatorships. The article demonstrates the importance of dividing samples into subsets to increase understanding of what affects women's representation in cabinets in different environments, and I ask scholars to subset samples and run separate analyses more often in comparative studies.

Analiza kapaciteta i uslova izgradnje fotonaponskih sistema na krovovima školskih objekata u Srbiji

2020 ◽  
Vol 22 (1-2) ◽  
pp. 21-28
Author(s):  
Iva Batić ◽  
◽  
Željko Đurišić
Keyword(s):  
Electricity Consumption ◽  
Plant Production ◽  
Electricity Production ◽  
School Buildings ◽  
Photovoltaic Systems ◽  
Photovoltaic Panels ◽  
Passive Construction ◽  
Production And Consumption ◽  
Roof Area ◽  
Installed Capacity

School and school gym buildings represent a relevant potential for construction of photovoltaic panels, to be integrated into roofs of these buildings. Given that roof structures are passive, construction of photovoltaic systems does not interfere with the building functionality, does not it in any way adversely affect the environment. Installation of photovoltaic systems on building roofs brings the production and consumption of electricity closest possible, therefore such systems ensure significant reduction in power losses in transmission and distribution grids. In addition to locally produced electricity, construction of photovoltaic systems on the school buildings’ roofs produces an educational effect as well. By installing a measuring and acquisition system which would include the measuring data on the photovoltaic power plant production parameters and school electricity consumption into school labs, technology would be closer to students, as well as possibilities to meet the demand for electricity from this basic renewable energy source. This paper presents the results of evaluations of the available roof surfaces of school buildings in Serbia for the photovoltaic panels installation. For each category of school building, an estimate of possible annual production per unit of average roof area was made. Summarizing all the results, estimates of possible installed capacity and annual electricity production for different scenarios are given.

scholarly journals Comparative Studies of Dialyzability of Levofloxacin and Amlodipine Using in Vitro Dialysis System with Three Different Types of Dialyzers

1999 ◽  
Vol 45 (5) ◽  
pp. 271-275 ◽  
Author(s):  
Mayumi Mochizuki ◽  
Rieko Yuda ◽  
Fumi Amano ◽  
Yuki Nakajima ◽  
Shin-ichi Yamagata ◽  
...  
Keyword(s):  
Comparative Studies ◽  
Different Types

scholarly journals Remarks on the usefulness of different types of transcription, with a particular regard to Turkic comparative studies

2011 ◽  
Vol 2011 (93) ◽  
Author(s):  
Kamil Stachowski
Keyword(s):  
Comparative Studies ◽  
Notation System ◽  
Level Of Abstraction ◽  
Different Types

The article attempts to determine what kind of transcription is best suited for (Turkic) comparative studies. Five questions are asked: what are the features of an ideal transcription, what level of abstraction is most useful, what notation system is most practical, and is it possible for a single transcription to encompass the entire Turkic family. Ultimately, a set of basic rules is proposed together with a small exemplification. 

scholarly journals Comparative studies of the deformation techniques for the singular-drift problem in the complex Langevin method

2018 ◽  
Vol 175 ◽  
pp. 07019 ◽  
Author(s):  
Yuta Ito ◽  
Jun Nishimura
Keyword(s):  
Low Temperature ◽  
Dirac Operator ◽  
Matrix Model ◽  
Comparative Studies ◽  
Deformation Parameter ◽  
High Density ◽  
Large N ◽  
Singular Drift ◽  
Different Types ◽  
Data Points

In application of the complex Langevin method to QCD at high density and low temperature, the singular-drift problem occurs due to the appearance of near-zero eigenvalues of the Dirac operator. In order to avoid this problem, we proposed to de-form the Dirac operator in such a way that the near-zero eigenvalues do not appear and to extrapolate the deformation parameter to zero from the available data points. Here we test three different types of deformation in a simple large-N matrix model, which under-goes an SSB due to the phase of the fermion determinant, and compare them to see the consistency with one another.

Life Cycle Assessment of Photovoltaics; Update of the ecoinvent Database

2007 ◽  
Vol 1041 ◽  
Author(s):  
Niels Jungbluth ◽  
Roberto Dones ◽  
Rolf Frischknecht
Keyword(s):  
Life Cycle ◽  
Environmental Impacts ◽  
Electricity Production ◽  
Research Projects ◽  
Industry Association ◽  
Ecoinvent Database ◽  
Federal Authority ◽  
Different Types ◽  
Production Stages ◽  
Background Database

AbstractRecently, the data for photovoltaics in the ecoinvent database have been updated on behalf of the European Photovoltaics Industry Association and the Swiss Federal Authority for Energy. Data have been collected in this project directly from manufacturers and were provided by other research projects. LCA studies from different authors are considered for the assessment. The information is used to elaborate a life cycle inventory from cradle to grave for the PV electricity production in 3kWp plants in the year 2005.The inventories cover mono- and polycrystalline cells, amorphous and ribbon-silicon, CdTe and CIS thin film cells. Environmental impacts due to the infrastructure for all production stages and the effluents from wafer production are also considered. The ecoinvent database is used as background database.Results from the LCA study are presented, comparing different types of cells and analysing also the electricity production in a range of different countries. It is also discussed how the environmental impacts of photovoltaics have been reduced over the last 15 years, using the CED indicator. The consistent and coherent LCI datasets for basic processes make it easier to perform LCA studies, and increase the credibility and acceptance of the life cycle results. The content of the PV LCI datasets is made publicly available via the website www.ecoinvent.org for ecoinvent members.

Study of Photovoltaic Systems’ Performances with Different Module Types

2016 ◽  
Vol 856 ◽  
pp. 279-284 ◽  
Author(s):  
Zahari Zarkov ◽  
Ludmil Stoyanov ◽  
Hristiyan Kanchev ◽  
Valentin Milenov ◽  
Vladimir Lazarov
Keyword(s):  
Theoretical Study ◽  
Weather Conditions ◽  
Operating Conditions ◽  
Experimental Results ◽  
Photovoltaic Systems ◽  
Experimental Site ◽  
Pv Systems ◽  
Research Platform ◽  
Pv Modules ◽  
Different Types

The purpose of the work is to study and compare the performance of photovoltaic (PV) generators built with different types of panels and operating in real weather conditions. The paper reports the results from an experimental and theoretical study of systems with PV modules manufactured according to different technologies and using different materials. The experiment was carried out at a research platform for PV systems developed by the authors, built and located at an experimental site near the Technical University of Sofia. Based on the obtained results, comparisons are made between the different PV generators for the same operating conditions. The comparison between the theoretical and the experimental results demonstrates a good level of overlap.

scholarly journals ¿Difiere la dinámica de enseñanza de las escuelas rurales del norte y sur de España? Propensión, contrastes y similitudes

2021 ◽  
Vol 39 (3) ◽  
pp. 11-36
Author(s):  
Francisco Javier García Prieto ◽  
Carmen Álvarez-Álvarez ◽  
Francisco José Pozuelos Estrada
Keyword(s):  
Curriculum Development ◽  
Rural Schools ◽  
Comparative Studies ◽  
Teaching Practice ◽  
Teaching Staff ◽  
The North ◽  
Different Types ◽  
Similarities And Differences ◽  
Attention To Diversity ◽  
Depth Interviews

Las escuelas rurales adoptan formatos distintos en cada país y desarrollan prácticas docentes comunes y divergentes con las urbanas. En España tenemos centros de diferentes tipos, que constituyen una compleja realidad. Sin embargo, apenas contamos con estudios comparativos entre regiones que muestren las peculiaridades de los diferentes tipos de centros y sus prácticas en nuestro país. En este artículo analizamos las semejanzas y diferencias que existen entre las dinámicas de enseñanza de las escuelas rurales del norte (Cantabria) y del sur de España (Huelva) a partir de un estudio cuantitativo (cuestionario) y cualitativo (entrevistas en profundidad). Los resultados comparan cuatro variables (práctica docente, desarrollo del curriculum, material didáctico y atención a la diversidad) en tres tipos de centros (unitarias, multigrado y graduadas). Las conclusiones muestran contrastes respecto a la innovación, el tratamiento de la diversidad o las plantillas docentes, y similitudes, en aspectos curriculares como el uso mayoritario del libro de texto o las dinámicas de enseñanza entre los diferentes tipos de centros educativos rurales. Rural schools take different forms in each country and develop common and divergent teaching practices in comparison to urban schools. In Spain we have different types of schools and this constitutes a complex reality. However, we hardly have comparative studies between regions that show the peculiarities of the different types of schools available. In this article, which adopts a quantitative (questionnaire) and qualitative (in-depth interviews) design, we analyse the similarities and differences that exist between the dynamics of teaching in rural schools in the north (Cantabria) and in the south of Spain (Huelva). The results compare four variables (environment, schools, teachers, students and families) in three types of schools (teaching practice, curriculum development, teaching materials and attention to diversity). The conclusions show contrasts with regard to innovation, attention to diversity or teaching staff; and similarities in curricular aspects such as the tendency to use textbooks or the dynamics of teaching within the different types of rural schools.  

scholarly journals Life Cycle Cost Comparison Study of PV and Concrete Rooftop in Jakarta

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Religiana Hendarti
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Department Of Energy ◽  
Cost Comparison ◽  
Electricity Production ◽  
Solar Panels ◽  
The Us ◽  
Different Types ◽  
Building Life Cycle ◽  
Total Life

This paper presents a comparative study of “life cycle cost” or LCC of a building school rooftop element in Jakarta. The simulation applied two different types of roof: a concrete roof and a PV rooftop. The aim of this study is to investigate the electricity production of the solar panels, the saving to investment ratio or SIR, and the total life cycle cost of each rooftop element. To accommodate those objectives, the calculation utilized a software called “Building Life Cycle Cost (BLCC) version 5” which is a product of the US Department of Energy. The simulation results showed that the LCC can be improved by 27.6%, and the “discounted payback” is reached at year 15. Indeed, this indicates that a roof made of solar panels is promising to replace the existing concrete roof.

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