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Modelling and performance improvement of nanostructured Cu2O/TiO2 pn heterojunction solar cells using SCAPS

- Ukoba, Kingsley, Jen, Tien-Chien

Authors: Ukoba, Kingsley , Jen, Tien-Chien
Date: 2019
Subjects: Cu2O, Performance, Nanostructured
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/${Handle} , uj:33029 , Citation : Ukoba, K. 2019. Modelling and performance improvement of nanostructured Cu2O/TiO2 pn heterojunction solar cells using SCAPS
Description: Abstract : This paper reported numerical simulation and performance improvement of nanostructured Cu2O/TiO2 pn heterojunction solar cells. The solar cells equations were modelled and thereafter theoretical validation of the nanostructured metal oxides was performed. The model working points include a room temperature of 300K, input power of 1000W/m2 using an illumination of AM1.5 lamp, and thickness of 2 μm. The modelled solar cell exhibits a short-circuit current (Jsc) of 0.2819 A, the open-circuit voltage (Voc) of 0.1640 V, the fill factor (FF) of 0.28, and the efficiency (η) of 13.38% at 2.00 μm thickness. Also, the band gap, electron affinity and Nyquist plot were obtained for the solar cells. This will serve as a theoretical guide for laboratory research on the improvement of efficiency of Cu2O metal oxide solar cells. This will open a new frontier for modelling of metal oxide based thin films solar cells especially Cu2O thin films solar cells. This is boaster in the quest to develop affordable and sustainable energy by encouraging more research in solar cells technologies in low-income countries.
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Critical factors influencing success of infrastructure projects

- Makabate, Choeu T., Wessels, Arie, Musonda, Innocent, Okoro, Chioma S.

Authors: Makabate, Choeu T. , Wessels, Arie , Musonda, Innocent , Okoro, Chioma S.
Date: 2018
Subjects: Construction industry , Critical success factors , Project success
Language: English
Type: Conference proceedings
Identifier: http://hdl.handle.net/${Handle} , uj:29888 , Citation: Makabate, C.T. et al. 2018. Critical factors influencing success of infrastructure projects.
Description: Abstract: Infrastructure projects that do not meet organisations' goals and objectives can have a negative impact on organisations, stakeholders and end–users. Studies have been conducted by various researchers to identify critical success factors (CSFs) that influence the successful outcomes of infrastructure projects. The main objective of the study discussed in this paper was to identify critical factors influencing project success. Questionnaires were devised from literature review and administered to construction industry professionals which included project team members, line managers and project managers. Based on the findings, political influence, adequate planning, project manager competence and adequate funding were ranked the highest critical success factors. The research findings are focused to assist industry professionals gain better understanding on key areas based on prioritised success factors in order to improve performance in project delivery.
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Dispute causation in the Swaziland construction industry

- Mashwama, Nokulunga Xolile

Authors: Mashwama, Nokulunga Xolile
Date: 2016
Subjects: Construction industry - Law and legislation - Swaziland , Construction projects - Swaziland - Management , Dispute resolution (Law) - Swaziland
Type: Masters (Thesis)
Identifier: http://hdl.handle.net/${Handle} , uj:21009
Description: Abstract: This research investigated dispute causation in construction projects in Swaziland, and also examined the methods that can be used to minimise construction disputes as well as methods of alternative dispute resolution to resolve construction disputes in projects in the Swaziland construction industry. The data used in this study were derived from both primary and secondary sources. The secondary data for the study were derived from the review of literature. The primary data were obtained through the use of a structured questionnaire which was distributed to client (government), contractor, subcontractor and consultant representatives (quantity surveyor, civil engineer, architects, project managers and mechanical and electrical engineers). Only organisations registered with the Ministry of Public Works and Transport in Swaziland and other professional bodies were surveyed. A total of 90 questionnaires were distributed, while 63 were returned, representing a response rate of 70 per cent. These data formed the basis of this study. Frequency analysis and various statistics procedures were used to analyse the returned questionnaire data. Findings emanating from the survey revealed that the major causative factors of construction dispute in Swaziland construction projects are client-related factors, contractor-related causes, design-related factors, contract-related causes; project-related factors and external-related factors. Findings on the effects of disputes in construction projects in Swaziland were the loss of productivity, loss of company reputation, loss of business viability, and loss of profitability. However, with respect to the cost of disputes, the findings revealed that hidden costs, indirect costs, and direct costs were major factors regarding the cost of disputes. In terms of dispute minimisation or dispute avoidance, strategies such as supply chain management, partnering, and alliancing have been identified from the study. From the findings it was discovered that the respondents felt that arbitration and the Dispute Resolution Board are the most efficient, effective and preferred methods to resolve disputes in construction projects. The results of this study contribute to the body of knowledge and provide valuable insights into the actual causes of disputes in Swaziland construction projects and ways to minimise the occurrence of dispute since resolving disputes is costly, and the effects are ugly. The study recommends that all stakeholders in the Swaziland construction industry familiarise themselves with the strategies of avoiding construction dispute to prevent the occurrence. Also, the government must take the initiative of educating all stakeholders about dispute avoidance since this would translate into massive savings in terms of projects and companies. , M.Tech. (Construction Management)
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Search for High-Mass Resonances Decaying to τν in p p Collisions at √s = 13 TeV with the ATLAS Detector

- The ATLAS Collaboration

Authors: The ATLAS Collaboration
Date: 2018
Language: English
Type: Article
Identifier: http://hdl.handle.net/${Handle} , uj:31166 , Citation: The ATLAS Collaboration. 2018. Search for High-Mass Resonances Decaying to τν in p p Collisions at √s = 13 TeV with the ATLAS Detector.
Description: Abstract: A search for high-mass resonances decaying to τν using proton–proton collisions at √s = 13 TeV produced by the Large Hadron Collider is presented. Only τ-lepton decays with hadrons in the final state are considered. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 36.1 fb−1. No statistically significant excess above the standard model expectation is observed; model-independent upper limits are set on the visible τν production cross section. Heavy W t bosons with masses less than 3.7 TeV in the sequential standard model and masses less than 2.2–3.8 TeV depending on the coupling in the non-universal G(221) model are excluded at the 95% credibility level.
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New political economies of film distribution for South Africa’s townships? a critical survey of the ReaGilè concept

- Mboti, Nyasha, Tomaselli, Keyan

Authors: Mboti, Nyasha , Tomaselli, Keyan
Date: 2016
Subjects: ReaGile , Film distribution , South African townhips
Language: English
Type: Article
Identifier: http://hdl.handle.net/${Handle} , uj:20292 , Citation: Mboti, N. & Tomaselli, K. 2016. New political economies of film distribution for South Africa’s townships? a critical survey of the ReaGilè concept.
Description: Abstract: ReaGilès are pre-fabricated, self-contained, education and entertainment complexes situated on 400m² sites at local schools or public open spaces consisting of a 60 seat cinema, 30 seat computer and internet facility, community care and policing centre. These complexes were intended to service historically under-serviced peri-urban black dormitory townships and to help create jobs, especially amongst the youth, women and the disabled. The ReaGilè concept has the potential to revolutionise exhibition and distribution in local film industries in ways mirroring the ground-breaking Nollywood straight-to-DVD model. The article discusses the potential of the ReaGilè concept to offer solutions to the twin crises: of i) representation stemming from existing film distribution networks that limit micro-budget filmmakers and, ii) of government departments and local municipalities’ tendency towards dividing practices that objectivise the subject through frustrating development via delays, paperwork, never-ending meetings, fees, endless formalities and legalities, and red-tape. The authors posit that ReaGilè has the potential to creatively redesign formal distribution models and to fracture the narrow modernisation paradigm they deploy, replacing them with a responsive communication re/ordering and flexible distribution that restores subjectivity to the disenfranchised South African subject (the filmmaker from the township).
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