843 research outputs found
Design and Economic Analysis of a Photovoltaic System-A Case Study
No full textThis paper presents the design analysis of a photovoltaic (PV) system to power the CAD/CAM Laboratory at the Department of Mechanical Engineering, University of Port Harcourt. Life cycle cost and break-even point analyses are also carried out to assess the economic viability of the system. The unit cost of electricity for the designed PV system is high compared to the current unit cost of the municipally supplied electricity, but will be competitive with lowering cost of PV system components and favourable government policies on renewable energy. The approach and data provided are useful for designing solar systems in the area. The automated MS Excel spreadsheet developed could be used for the design and economic analyses of PV system in any other geographical region once the input data are sorted. Since about 90% of businesses in Nigeria currently own diesel generators, it is expected that future work should be devoted to the optimum combination of PV-Battery-Diesel system in electricity generation for optimum economic benefits to the countr
Solution Tree Problem Solving Procedure for Engineering Analysis Problems
No full textThis paper presents a 10-step procedure, called the solution-tree problemsolving procedure, for solving engineering analysis problems. The core of the procedure is the development of a tree-like solution algorithm for the problem or class of problems, based on the divide-and-conquer and top-down design concepts. Illustrations are provided in the thermofluid engineering area to showcase the procedure’s applications. This approach has proved to be a veritable tool for enhancing the problem-solving and computer algorithmic skills of engineering students, eliciting their curiosity, active participation and appreciation of the taught course. It also affirms the procedural nature of many engineering professional activities, and instils in the students good ethical conduct in their engineering problem-solving effort.Keywords: Problem-solving algorithm; engineering analysis problem;solution tree; thermofluid; engineering educatio
In the light of Franco-Nigerian Literature: a conversation with Ramonu Sanusi, author of “Un nègre a violé une blonde à Dallas” (2016)
No full textAuthor of Un nègre a violé une blonde à Dallas (2016)
On "perskie oko" ("Persian eye") and on what is really Persian in Polish phrasemes
No full textPoza kobiercem i tkaninami, które rzeczywiście sprowadzano z Persji lub wytwarzano w naszych persjarniach, pozostałe rzeczowniki występujące w polskich konstrukcjach frazeologicznych z przymiotnikiem „perski” mają z Persją niewiele wspólnego. Podobnie jest z perskim kotem, który wcześniej był znany w Europie jako kot angorski (ankarski) i którego sprowadzano do Europy także z Turcji i Damaszku (kot damasceński). Tak samo perski proszek był w istocie pochodzenia kaukaskiego, karakuły wywodzą się z Azji Środkowej (miejscowość Karakul w Uzbekistanie), zaś perskie oko było francuskim kalamburem: l’œil perçant ‘oko bystre, przenikliwe’ wymawiane tak samo jak l’œil persan ‘perskie oko’The subject of the article are certain idiomatic expressions constructed with the adjective perski (‘Persian’) in Polish: perskie oko (‘Persian eye’), perski dywan (‘Persian carpet’), perski proszek (‘Persian powder’) etc. Moreover, the author attempts to answer the question: What do we have that is really perski (‘Persian’) in Polish? Are these phrases really related to Persia or Persians, or are they just a word game (homophones)? So far the origin of the most popular one, i.e. perskie oko (‘Persian eye’) has not been established even though a lively discussion on this subject was held on the pages of the Język Polski 90 years ago. It was started by Stanisław Szober who in his book Life of words, explained the origin of the phrase perskie oko for the first time, indicating that it is a semantic borrowing from French, and its basis is l’oeil perçant ‘piercing eye’. In response, Józef Birkenmajer claimed this popular phrase comes from Krakow, relating it – quite incredibly – to a Persian man on the label of the popular Zacherlin insecticide powder called perski proszek (‘Persian powder’). It turns out that the source of this expression was a French anecdote by Alphonse Karr from the late nineteenth century based precisely on the word game
Theatre and social criticism in African literature: socio-cultural consciousness in Alachi’s “Dilemma of Oko”
No full textSince literature is a creative work that mirrors society, Alachi in The Dilemma of Oko, observes aspects of the social, political, cultural and moral degeneration of contemporary society. He presents them in this play with thorough detachment and clinical dispassion. The play presents the image of a society, whose moral order provides a set of meaning, by which members of society understand their experiences and make sound judgments about what is valuable and important. Deeply influenced by real life experiences, the author portrays the physical suffering and mental agonies which arise from man’s conflict with the hostile surroundings in which he lives. He depicts not only the confrontation between the society and the individual, but also modern man’s total failure to understand either himself or others in the society. The play combines social criticism with the tragedy of an individual victimized by society.Keywords: Social Criticism, Moral degeneration, Convergence of cultures, foreign phenomena, societal norms, Traditional ethics, Traditional institution
Design and Economic Analysis of a Photovoltaic System: A Case Study
No full textThis paper presents the design analysis of a photovoltaic (PV) system to power the CAD/CAM Laboratory at the Department of Mechanical Engineering, University of Port Harcourt. Life cycle cost and break-even point analyses are also carried out to assess the economic viability of the system. The unit cost of electricity for the designed PV system is high compared to the current unit cost of the municipally supplied electricity, but will be competitive with lowering cost of PV system components and favourable government policies on renewable energy. The approach and data provided are useful for designing solar systems in the area. The automated MS Excel spreadsheet developed could be used for the design and economic analyses of PV system in any other geographical region once the input data are sorted. Since about 90% of businesses in Nigeria currently own diesel generators, it is expected that future work should be devoted to the optimum combination of PV-Battery-Diesel system in electricity generation for optimum economic benefits to the country. Keywords: photovoltaic system design, renewable energy technology, solar energy economic
Optimal mapping of hybrid renewable energy systems for locations using multi-criteria decision-making algorithm
No full textThis paper presents the optimal mapping of hybrid energy systems, which are based on wind and PV, with the consideration of energy storage and backup diesel generator, for households in six locations in the South-South geopolitical (SS) zone of Nigeria: Benin-city, Warri, Yenagoa, Port Harcourt, Uyo and Calabar. The optima hybrid energy systems are able to meet 7.23 kWh/day household's electrical energy demand. The hybrid energy system for each of the locations was optimally obtained based on HOMER software computation and TOPSIS multi-criteria decision-making algorithm that considers technical, economic, environmental, and sociocultural criteria. Wind energy potential was conducted for the six locations using the Weibull distribution function; the wind speed ranges between 3.21 and 4.19 m/s at 10 m anemological height. The wind speeds and the wind characteristics were extrapolated for 30 m and 50 m hub heights. The solar resource potentials across the six locations are also presented – ranges between 4.21 and 4.71 kWh/m2/day. The best hybrid system for the locations in Benin-city, Yenagoa and Port Harcourt is the Diesel generator-PV-Wind-Battery system; whereas the best hybrid system for the locations in Warri, Uyo and Calabar is the PV-Wind-Battery system. The hybrid systems in Benin-city, Yenagoa and Port Harcourt emit CO2, only 8.47%, 15.02% and 14.09% of the business as usual (the diesel generator). The payback time ranges between 3.7 and 5.4 years, using 0.893 US/kWh, which compares well with available data in the public domain. The design parameters of the optima hybrid energy systems are also presented. The methodology presented here will serve as a design tool for renewable energy professionals
Mass Media as the Key Space for Preaching and Defending Christian Personalism
No full textSince the invention of print, the media have been increasingly influencing individual and social awareness. They seem apt to undo, in a relatively short period of time, whatever good the upbringing and authorities of a high moral standard have instilled into a person. However, the media can also support the development of this good in a significant way. They are a powerful tool that everyone has to reckon with, they are a place to exchange all sorts of ideas – from the worst to the best. That is the reason why anyone who wants to proclaim the principle of Christian personalism in society should try to think through how to wisely use them to spread the message. However, this message will inevitably meet with strong opposition from people who have opposite beliefs and from the media they own, as they have made them a fundamental place for the struggle for power and dominion over human consciousness. This article, written on the basis of theoretical considerations, but also the rich media experience of the author, attempts to provide practical advice on these matters. The article explains the common structure of all such opposition that follows the pattern of the very loud media case of Fr. Krzysztof Charamsa (in which the author was himself deeply entangled), Tygodnik Powszechny and Gazeta Wyborcza which supported him. In this way, the article shows the mechanisms of manipulation of contemporary media, but also the remedies available
Immanuel - author s concept of landcape photography
No full textOvaj završni rad obuhvaća čovjekovo shvaćanje okoliša oko sebe, kao i ulogu koju ima te
identitet koji mu je dan. Sve to je prezentirano na autorov vlastiti način koji je potaknut umjetnošću
i medijem fotografije. Inspiriran kroz stil piktorijalizma i „straight“ fotografije te kroz vlastiti
odnos s Bogom autor je iznio svoje shvaćanje, doživljaje i osjećaje krajobraza oko sebe kao i
društva. Velika paralela u svemu je bio i Ansel Adams koji je autoru bio ne samo umjetnička
inspiracija već i filozofska
Immanuel - author s concept of landcape photography
No full textOvaj završni rad obuhvaća čovjekovo shvaćanje okoliša oko sebe, kao i ulogu koju ima te
identitet koji mu je dan. Sve to je prezentirano na autorov vlastiti način koji je potaknut umjetnošću
i medijem fotografije. Inspiriran kroz stil piktorijalizma i „straight“ fotografije te kroz vlastiti
odnos s Bogom autor je iznio svoje shvaćanje, doživljaje i osjećaje krajobraza oko sebe kao i
društva. Velika paralela u svemu je bio i Ansel Adams koji je autoru bio ne samo umjetnička
inspiracija već i filozofska
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