1,721,069 research outputs found
Research on foreign direct investment and renewable electricity industry nexus in Africa / Ahmed Rashed Ahmed
No full textIn addition to three introductory chapters, this doctoral thesis incorporates a collection of five empirical research papers on Foreign Direct Investment (FDI) and Renewable Electricity Industry (REI) in Africa. It suggests actionable recommendations on Africa's electricity insecurity issues. Those issues worsen daily, aggravating all facets of African life. In 2019, the International Energy Agency (IEA) estimated that 600 million Africans lived without electricity access and about 900 million lacked healthy cooking facilities in Sub-Saharan Africa (SSA), which particularly suffers from a clear shortage of published renewable energy data and studies. Africa's rapid population growth is another concern, coupled with a growing renewable energy financing gap. As a response to Africa's limitless renewable resources, the IEA recommends stimulating green FDI and renewable electricity production (REP). The first paper is entitled "Determinants of FDI in REI in Africa". A novel dataset of FDI corporations in the REI during 2003–2019 has been obtained. Using the FDI panel gravity fixed effects Poisson pseudo-maximum likelihood model, the uselessness of changes in fossil fuel subsidies in stimulating green FDI is revealed. However, a 1% growth in Africa's gross domestic product (GDP) expands FDI by almost 1.5%. Furthermore, increasing the number of educated African children and raising awareness of renewable energy contribute constructively to REI development. Besides, to understand the green FDI-REP relationship, the second paper, entitled "the nexus among FDI in the REI, REP, and GDP in Africa," is conducted to inspect the existence and nature of co-integration and causality nexuses among these variables in 32 African countries over 2003–2019. Applying the panel vector autoregression model based-Granger causality test and a static panel data approach, a unidirectional Granger causality/growth hypothesis between REP and GDP is found. Further, the neutrality hypothesis is confirmed among the remaining variables. Paying particular heed to SSA, as the third paper is titled "Causality analysis among FDI, renewable electricity output (REO), and GDP: Evidence from SSA". The paper uses the panel vector autoregression generalized method of moment model and found that REO predicts/causes GDP growth and vice versa. Thus, the feedback hypothesis is confirmed. Also, no causal effect was revealed between FDIREI-REO and FDIREI-GDP. To intensify research on Africa's green power, the fourth paper, "Determinants of Renewable Electricity Generation (REG) in Africa: A Focus on FDI", is introduced. To date, the impact of FDI on REG in Africa has yet to be investigated. By using the Prais- Winsten panel corrected standard errors model, the study finds compelling evidence that FDI inflows directly and indirectly limit, or even impede, the REG's development. The African population growth undermines REG. However, the encouraging result is that raising African awareness of renewable energy boosts REG. The fifth paper, "FDI and the Gap of Clean Power Finance: The Case of Africa", theoretically addresses the determinants of the clean energy financing gap and the Paris Agreement's impact on green FDI. The research found that the Paris Agreement attracts clean FDI. However, the gap is mainly attributed to corruption, underdeveloped policies, and the absence of accurate data. Moving forward, focused and diverse policy implications are outlined in the thesis
Determination of Quality of Iced Freshwater Species Based on Total Volatile Base Nitrogen (TVB-N) and Microbial Contents Test
No full textThe following two types of freshwater fish species {tilapia hybrid Oreochromis niloticus x Oreochromis aureus and the Common Carp Cyprinus Carpio were purchased from aquaculture farm and assessed for quality changes during 13 days postmortem of ice storage. The total volatile basic nitrogen TVB N and microbial contents of iced freshwater fish species were assessed as indices of spoilage t 0, 3, 5, 7, 10 and 13 days postmortem. all fish species under investigation had pH value higher than 6.8. Tilapia fish had higher TVBN values than carp fish. Tilapia and carp reached their maximum TVBN content on the 7th and none of them reached the rejection limit 30 mg 100 g during the storage period. In this study TVBN of freshwater fish species ranged from 18.67 to 20.07 and from 19.13 to 23.80 mg 100g muscle during the storage period for carp and tilapia respectively. The total plate counts for microbial growth of freshwater fish species were similar for all fish species under investigation. Bacteria grew rapidly between day 1 and 10. However, Tilapi had the lowest initial TPC and the highest TPC at the end of the storage period 10 days . Bacteria grew progressively on freshwater fish species to reach a high count of 6.5, 5.7 and 6 log 10 CFU g fish for tilapia and carp respectively. None of freshwater fish species reached the maximum microbiological limit set by ICMSF 1978 . psychrotrophic counts increased rapidly and tended to reach their maximum counts at the end of the storage period, and were 2.6 and 3.3 log 10 CFU g fish for tilapia, and carp respectively. Total coliform counts were 1.3 and 2.3 log CFU g fish and increased with extended storage to reach their maximum values of 4.1and 3.5 log CFU g fish for tilapia and carp respectively..Proteolytic counts of all fish species increased with extended storage reaching their maximum count on the last day of storage period. The average proteolytic counts of freshwater species were 1.9 and 3.0 log CFU g reaching a maximum values of 3.9 and 4.8 log CFU g at the end of storage period for tilapia and carp respectively. Ahmed Rashed Al-Najada "Determination of Quality of Iced Freshwater Species Based on Total Volatile Base Nitrogen (TVB-N) and Microbial Contents Test" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29795.pd
Demonstration scale treatment of drainage canal water in the Nile Delta through a combination of facultative lagoons and hybrid constructed wetlands
Full text linkAbstract
Drainage canal water (DCW), a mixture of Nile water, drainage water and municipal wastewater, is largely used for irrigation in the Nile Delta. Facultative lagoons (FL) and constructed wetlands (CWs) represent interesting options for DCW treatment before its agricultural re-use, but very few studies investigated their implementation in Egypt. This work aimed at developing at demonstration scale (250 m3 d−1) a FL + CW treatment train capable to turn DCW into an effluent reusable in agriculture. Three types of hybrid CWs were tested in parallel for 530 days. The combination of FL with a cascade hybrid CW, operated at a 200 L d−1 m−2 surface loading rate, led to medium-to-high removal efficiencies (suspended solids 90%, total nitrogen 84%, phosphate 80%, COD 67%, faecal coliforms 2.2 Log) and surface removal rates (COD 47.5 t y−1 ha−1, total nitrogen 10.9 t y−1 ha−1, faecal coliforms 1.5
1011 MPN y−1 ha−1). The effluent, compliant with class C of EU 2020/741 regulation, is potentially reusable to irrigate numerous Egyptian crops. The results show that the combination of FLs with cascade hybrid CWs has a great potential for the treatment of DCW and low-strength municipal wastewater, with near-zero energy consumption, null consumption of chemicals and a land requirement varying between 1.1% and 1.5% of the agricultural land irrigated with the treated DCW
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
