9 research outputs found
Performance Prediction of Construction Projects using Soft Computing Methods
No full textKey Performance Indicators (KPIs) evaluate different aspects of projects and are used as a thermometer to determine the health status of projects. While there is considerable work on project quantitative performance prediction, less attention, however, has been directed towards qualitative performance. This paper offers a novel framework for qualitatively measuring and predicting six important construction project KPIs using neuro-fuzzy technique. Neuro-fuzzy models are developed to map the KPIs of three critical project stages to the whole project KPIs. Subtractive clustering is utilized to automatically generate initial Fuzzy Inference System (FIS) models and the artificial neural network (ANN) technique is used to tune the parameters of the initial FIS models. The relative weight of each KPI is determined using Analytic Hierarchy Process (AHP) and Genetic Algorithm (GA) to generate Performance Indicator (PI). This framework can be used in building construction projects to help decision-makers evaluate the performance of their projects.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Gas Leakage Detection in Recovery Rooms Using a Microcontroller
No full textGas leakage in medical facilities can pose a serious threat to patient safety and can have catastrophic consequences. Hence, it is essential to detect gas leaks quickly and accurately to prevent any accidents. Various gas detection techniques have been developed to identify gas leaks, including the utilization of Arduino microcontrollers and oxygen sensors. Arduino microcontrollers offer a low-cost and easily deployable solution, while oxygen sensors provide specific detection capabilities for gases commonly used in medical facilities, such as oxygen, nitrogen, and anesthesia gases. Furthermore, the use of advanced technologies such as wireless communication, cloud computing, and artificial intelligence has improved the detection and monitoring of gas leaks. This abstract highlights the importance of gas leak detection in medical facilities and emphasizes the role of Arduino microcontrollers and oxygen sensors, along with advanced technologies, in improving gas detection and prevention of accident
On evildoers: A Foucaultian analysis of the discursive structuring of contemporary terrorism
No full textTerrorism is routinely portrayed in the twenty first century as an evil perpetrated by Arab/Muslim barbarians—Evildoers—waging a holy war against the Western civilisation. This study challenges not just this present understanding of terrorism, but the very existence of a ding an sich of terrorism. Using a combination of Foucault’s archaeological and genealogical methods it provides an alternative history of the phenomenon in the form of a history of its discursive structuring: the regimes of practices that governed what could and could not be thought of, identified, defined, known, judged and punished as ‘terrorism’ during particular epochs, and particular places. It asserts that the conceptual anchor point of the present Evildoer-terrorist is the rebel who opposes established order, and identifies the first such figure in modern Western history as the Devil who rebelled against God and came to play a significant politico religious role in Western societies of the Middle Ages. The discourse of ‘terrorism’ emerged from the epistemic spaces created from the separation of religion and politics in the eighteenth century, from when onwards rebellion was no longer a sin but a crime. Since then, various other rebels have been brought under the domain of terrorism during different epochs, the latest of whom is the Evildoer. This is not to say that the Devil remained a blatant constant in the forefront of Western terrorism discourse, but that the various rebels share a conceptual history that made it possible for the contemporary terrorist to be the Evildoer that he is. How the rebels came to be known as terrorists during various epochs and the various mechanisms implemented to defend societies against them, it is argued, are irrevocably linked: one could not exist without the other. The contemporary terrorist cannot be known as an Evildoer without the War on Terror; at the same time, the War on Terror cannot be waged without the knowledge of the terrorist as an Evildoer. To demonstrate this power/knowledge dyad at work, this study analyses what was said and done about terrorism by the United States and the United Kingdom, the foremost allies in the War on Terror, during its first ten years. In the differences in their discourses emerges not just the ontological uncertainty of terrorism but also how these mechanisms for establishing the ‘truth’ of terrorism function as mechanisms of power. It is asserted that the Evildoer has made possible, and was made possible by, some of the most significant changes in how power is exercised in Western societies since the separation of religion and politics in the eighteenth century
Investigation of soil resistivity impacts on the electrodes of grounding system subjected to lightning strikes
No full textPublisher Copyright: © 2024 The Author(s). IET Generation, Transmission & Distribution published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.In this paper, the study of the homogeneous resistivity and two-layer soil influences on the performance of the electrodes of grounding systems subjected to lightning strikes is carried out considering soil ionization. The study is done on the behaviour of the ground electrodes while the resistivity of the soil is altered from small to high value in the case of homogeneous soil, while the study is obtained on two-layer soils in the case of diverse values of the reflection factor. In the suggested algorithm for two-layer soils, each layer has its resistivity and dielectric constant, where the dielectric constant and soil resistivity depend on the lightning frequency. The field resulting from lightning strikes, which causes soil ionization, has been studied, and the results have been used to understand the behaviour of ground rods under the influence of lightning strikes. The credibility of the results has been strengthened by comparing it with what others have obtained recently. The article's novelty can be summarized in the investigation of the performance of the electrodes of grounding grids that are installed in high soil resistivity of uniform and two-layer soils containing the impacts of soil ionization, lightning frequency, soil resistivity, and permittivity variations.Peer reviewe
Probing into the properties of B4C reinforced nickel phosphorus-based nanocomposite coating
No full textNickel-based coatings are well known for their good corrosion resistance performance. However, these materials suffer from inferior mechanical properties that limit their wider application. This work investigates the synthesis, and performs an exhaustive characterization, of Ni-P-B4C nanocomposite coatings developed through conventional electrode -position using a modified Watts bath. The study examines the effect of an increase in the concentration of boron carbide nanoparticles (BCNPs) on the structural, morphological, topographical, mechanical and electrochemical properties of the nanocomposite coating. Vickers microhardness tester and nanoindentation technique were utilized to elucidate the role of BCNPs in modifying the mechanical response of nanocomposite coatings. Furthermore, corrosion resistance of the nanocomposite coatings was investigated through d.c potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Comparison of the properties of the developed coatings revealed the remarkable improvement in the properties of Ni-P-B4C nanocomposite coatings when compared to the bare mild steel substrate and the Ni-P coatings. The enhanced corrosion resistance and superior mechanical properties of Ni-P-B4C nanocomposite coatings make them attractive for many industries. Based upon the experimental findings, a possible mechanism for the synthesis and improved corrosion resistance of Ni-P-B4C nanocomposite coatings was also proposed. (c) 2022 The Author(s). Published by Elsevier B.V
Genetic and Neural Mechanisms that Inhibit Drosophila from Mating with Other Species
No full textSummaryGenetically hard-wired neural mechanisms must enforce behavioral reproductive isolation because interspecies courtship is rare even in sexually naïve animals of most species. We find that the chemoreceptor Gr32a inhibits male D. melanogaster from courting diverse fruit fly species. Gr32a recognizes nonvolatile aversive cues present on these reproductively dead-end targets, and activity of Gr32a neurons is necessary and sufficient to inhibit interspecies courtship. Male-specific Fruitless (FruM), a master regulator of courtship, also inhibits interspecies courtship. Gr32a and FruM are not coexpressed, but FruM neurons contact Gr32a neurons, suggesting that these genes influence a shared neural circuit that inhibits interspecies courtship. Gr32a and FruM also suppress within-species intermale courtship, but we show that distinct mechanisms preclude sexual displays toward conspecific males and other species. Although this chemosensory pathway does not inhibit interspecies mating in D. melanogaster females, similar mechanisms appear to inhibit this behavior in many other male drosophilids.PaperCli
Exploring the cost-effectiveness of high versus low perioperative fraction of inspired oxygen in the prevention of surgical site infections among abdominal surgery patients in three low- and middle-income countries
No full textBackground: This study assessed the potential cost-effectiveness of high (80–100%) vs low (21–35%) fraction of inspired oxygen (FiO2) at preventing surgical site infections (SSIs) after abdominal surgery in Nigeria, India, and South Africa. Methods: Decision-analytic models were constructed using best available evidence sourced from unbundled data of an ongoing pilot trial assessing the effectiveness of high FiO2, published literature, and a cost survey in Nigeria, India, and South Africa. Effectiveness was measured as percentage of SSIs at 30 days after surgery, a healthcare perspective was adopted, and costs were reported in US dollars (216 compared with 6 (95% confidence interval [CI]: −1) difference in costs. In India, the average cost for high FiO2 was 195 for low FiO2 leading to a −15 to −1164 compared with 93 (95% CI: −65) difference in costs. The high FiO2 arm had few SSIs, 7.33% compared with 8.38% for low FiO2, leading to a −1.05 (95% CI: −1.14 to −0.90) percentage point reduction in SSIs. Conclusion: High FiO2 could be cost-effective at preventing SSIs in the three countries but further data from large clinical trials are required to confirm this. © 2023 The Author
Pooled analysis of WHO Surgical Safety Checklist use and mortality after emergency laparotomy
No full textBackground
The World Health Organization (WHO) Surgical Safety Checklist has fostered safe practice for 10 years, yet its place in emergency surgery has not been assessed on a global scale. The aim of this study was to evaluate reported checklist use in emergency settings and examine the relationship with perioperative mortality in patients who had emergency laparotomy.
Methods
In two multinational cohort studies, adults undergoing emergency laparotomy were compared with those having elective gastrointestinal surgery. Relationships between reported checklist use and mortality were determined using multivariable logistic regression and bootstrapped simulation.
Results
Of 12 296 patients included from 76 countries, 4843 underwent emergency laparotomy. After adjusting for patient and disease factors, checklist use before emergency laparotomy was more common in countries with a high Human Development Index (HDI) (2455 of 2741, 89·6 per cent) compared with that in countries with a middle (753 of 1242, 60·6 per cent; odds ratio (OR) 0·17, 95 per cent c.i. 0·14 to 0·21, P < 0·001) or low (363 of 860, 42·2 per cent; OR 0·08, 0·07 to 0·10, P < 0·001) HDI. Checklist use was less common in elective surgery than for emergency laparotomy in high‐HDI countries (risk difference −9·4 (95 per cent c.i. −11·9 to −6·9) per cent; P < 0·001), but the relationship was reversed in low‐HDI countries (+12·1 (+7·0 to +17·3) per cent; P < 0·001). In multivariable models, checklist use was associated with a lower 30‐day perioperative mortality (OR 0·60, 0·50 to 0·73; P < 0·001). The greatest absolute benefit was seen for emergency surgery in low‐ and middle‐HDI countries.
Conclusion
Checklist use in emergency laparotomy was associated with a significantly lower perioperative mortality rate. Checklist use in low‐HDI countries was half that in high‐HDI countries
Burnout among surgeons before and during the SARS-CoV-2 pandemic: an international survey
No full textBackground: SARS-CoV-2 pandemic has had many significant impacts within the surgical realm, and surgeons have been obligated to reconsider almost every aspect of daily clinical practice. Methods: This is a cross-sectional study reported in compliance with the CHERRIES guidelines and conducted through an online platform from June 14th to July 15th, 2020. The primary outcome was the burden of burnout during the pandemic indicated by the validated Shirom-Melamed Burnout Measure. Results: Nine hundred fifty-four surgeons completed the survey. The median length of practice was 10 years; 78.2% included were male with a median age of 37 years old, 39.5% were consultants, 68.9% were general surgeons, and 55.7% were affiliated with an academic institution. Overall, there was a significant increase in the mean burnout score during the pandemic; longer years of practice and older age were significantly associated with less burnout. There were significant reductions in the median number of outpatient visits, operated cases, on-call hours, emergency visits, and research work, so, 48.2% of respondents felt that the training resources were insufficient. The majority (81.3%) of respondents reported that their hospitals were included in the management of COVID-19, 66.5% felt their roles had been minimized; 41% were asked to assist in non-surgical medical practices, and 37.6% of respondents were included in COVID-19 management. Conclusions: There was a significant burnout among trainees. Almost all aspects of clinical and research activities were affected with a significant reduction in the volume of research, outpatient clinic visits, surgical procedures, on-call hours, and emergency cases hindering the training. Trial registration: The study was registered on clicaltrials.gov "NCT04433286" on 16/06/2020
