302 research outputs found
sj-docx-1-jpc-10.1177_21501327211054996 – Supplemental material for Age-Adjusted D-Dimer in the Prediction of Pulmonary Embolism: Systematic Review and Meta-analysis
No full textSupplemental material, sj-docx-1-jpc-10.1177_21501327211054996 for Age-Adjusted D-Dimer in the Prediction of Pulmonary Embolism: Systematic Review and Meta-analysis by Kenneth Iwuji, Hasan Almekdash, Kenneth M. Nugent, Ebtesam Islam, Briget Hyde, Jonathan Kopel, Adaugo Opiegbe and Duke Appiah in Journal of Primary Care & Community Health</p
Analysing the impact of operational challenges on value perceptions of South African luxury fashion brands
No full textDeterminants of online shopping among tertiary students in Ghana: An extended technology acceptance model
No full textThe increasing penetration rate of the internet and technology in the world is quickly promoting online shopping. This has been fueled by growing innovations in the telecommunication and financial sector in an attempt to depeen financial inclusion. Innovations such as mobile money payments systems by mobile telephony companies have contributed to the continuous growth in online shopping amidst and the new generation of consumers who desire richer experiences. This study sought to identify the determinants of online shopping behaviour among tertiary students through the lens of the Technology Acceptance Model (TAM). The study proposed a revised TAM that integrated perceived cost and perceived risk to investigate what determined students online shopping intention and actual use. The survey involved a sample of 580 undergraduate students. The statistical technique used was Structural Equation Modelling-Partial Least Squares (SEM-PLS). The results showed that effect of ease of use on usefulness was very significant as same has been predicted by the Technology Acceptance Model. Among the independent variables, perceived cost (PC) was found to be the most significant factor affecting actual use (AU) of online shopping among students, nonetheless, perceived cost (PC) had no significant effect on purchase intention (PI). Perceived risk (PR) had no significant effect on actual use (AU) however, had a significant effect on purchase intention (PI). The study recommends online sellers to make online shopping efficient and less costive with assured safety and security of transactions as well as the product itself. A set of shopping platform could even be created specifically to give discounts and other offers to students. It also recommends future studies to employ additional determining factors such as the type of product/service, convenience and personal/demographic and geographic factors as influential to students’ online purchasing behaviour. © 2019, © 2019 The Author(s). This open access article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license
Supported NiMo carbidic (phosphidic)-sulphidic catalysts as interesting alternatives for hydrotreating of fatty acids to obtain renewable diesel
No full textThe effect of the composite type of NiMo on the hydrotreating of fatty acids was evaluated. XRF showed atomic ratio Ni:Mo and Mo:Ni:P ∼1 and SEM- EDS confirmed the elements were well-distributed on supports, although small metal aggregates were also observed. XRD revealed the Ni3Mo3C and NiMoP formation in the NiMo carbidic-sulphidic and phosphidic-sulphidic catalysts, respectively. MoS2 formation was observed by the Raman spectra. The carbidic-sulphidic/phosphidic-sulphidic composites have the following textural properties: 219/58 m2/g (SBET), 0.094/0.20 cm3/g (Vp), and 5.4/14.2 nm (Dp), but no correlation with the catalytic behavior. XPS results evidenced the mixture carbide-sulfide or phosphide-sulfide. NiMo phosphidic-sulfidic composite has higher activity in HDO, HDCx-HDCn, and HCK than the material obtained from carbides, which was related to metal oxophilic capacity
BIM adoption in integrated supply chains: A multiple case study
No full textThis paper explored the status of BIM adoption in construction Supply Chains (SC). The benefits of BIM are found from design management, to virtual construction and site management. The study is structured upon the assumption that BIM not only supports intra-firm collaboration, but also improves inter-firm collaboration in projects with SC management (SCM) application. Next, a set of real-world SCM projects was analysed empirically via interviews and questionnaires. These BIM-based SCM projects displayed various degrees of SC team integration and BIM collaboration routines. The multi-case analysis suggested that BIM-readiness was a significant parameter for choosing partners and forming the SC partnership. Finally, the paper compared various levels of BIM collaboration to SC maturity and discussed the benefits and lessons learned from combining BIM technology and SCM theory.Design & Construction Managemen
Platinum group metal-free NiMo hydrogen oxidation catalysts: high performance and durability in alkaline exchange membrane fuel cells
No full textA highly active NiMo electrocatalyst for HOR in alkaline media with power density at 0.5 V higher than 100 mW cm−2 (peak value of 120 mW cm−2), which is similar to palladium was synthesized and comprehensively studied.</p
Book review: As If: Idealization and Ideals by Kwame Anthony Appiah
No full textThis is the author accepted manuscript. The final version is available from OUP via the DOI in this recordBook review of As If: Idealization and Ideals by Kwame Anthony Appiah. Cambridge, MA: Harvard University Press, 2017.Kwame Anthony Appiah’s engaging and insightful new book focuses on idealisation. Based on three Carus Lectures delivered at the 2013 Eastern Division Meetings of the American Philosophical Association, the book takes its inspiration from the German philosopher Hans Vaihinger and his The Philosophy of ‘As If’ (1911). Long neglected, Vaihinger’s work has recently been revisited by philosophers of science interested in scientific modelling, most notably Arthur Fine. Vaihinger’s own interests were much broader, however, taking in metaphysics, mathematics, ethics, law, theology and economics. Appiah’s range is equally impressive and his discussion applies Vaihinger’s ideas across a wide range of areas, including philosophy of mind, economics, moral and political philosophy. In doing so, it offers a striking and extremely valuable insight into the pervasive role of idealisation in human thought. [...
Wind turbine rescue: emerging skill retention issues and challenges
No full textThe wind energy sector is becoming an increasingly important one for those involved in construction and with the increasing number of technicians employed in the industry, issues of occupational health and safety becomes of paramount interest. This paper explores the occupational health and safety challenges in the wind energy industry in relation to wind technicians' safe and competent use of a rescue and evacuation device in emergency situations whilst working at height. The study reported here evaluated the magnitude of procedural skill and knowledge retention over a three-month period after acquisition; the significant factors influencing procedural skill retention during safe rescue and evacuation; and the impact of cued recognition/recall methods on skill retention. Thirty trainees fully participated in the retention study at intervals of 28 and 90 days. The results suggest that refresher participants should undertake rescue and evacuation practice drills between three and six months after acquisition while fresher participants should undergo practice drills within the first three months. The contributing factors influencing the technicians' procedural rate of retention are the length of time after acquisition and practice, experience, feedback and it is advisable that cues be embedded within the training because with fundamental cues, there is increased retention of procedural tasks. This has implications for the wider construction industry where work at height in harness are carried out in isolated places.</p
International competitiveness of SMEs: a case of Ghanaian non-traditional horticultural exporters
No full textAnalysis of the Parametric Instability of the STC Combined Wind and Wave Energy Concept
No full textResonant motions of a combined wind and wave concept (STC) in waves may induce significant loads in the structural components (such as wind turbine blades, nacelle or the interface between the spar and the torus). One type of resonant motions is related to the so-called Mathieu instability. For the STC under the survival mode where the torus is locked to the spar at the mean water level (MWL mode), the large heave motion in severe waves induces a significant change in the buoyancy center and therefore leads to a periodic change in the restoring term for the pitch motion. When the wave period reaches the half of the natural period, the Mathieu instability (a dynamic instability in pitch for this case) occurs and leads to significant pitch motions.The purpose of this study is to numerically predict such unstable motions for regular and irregular wave conditions and to compare the results with the experimental observations. First, a literature study on Mathieu instability is carried out to understand the mechanism behind this phenomenon. Then the results of the STC concept from the experiments carried out by Dr. Ling Wan are investigated in order to study the developments of the Mathieu unstable pitch motions and the corresponding wave conditions in which they occur. Finally, a numerical model of Mathieu instability for analysis of the STC pitch motions is established to get insight into the phenomenon.The numerical model is compared with the experimental results of Dr. Ling Wan. A sensitivity study using the numerical model is then carried out to investigate the conditions where the Mathieu instability may occur
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