Online Physics Experiment

The current implementation of traditional hands-on laboratory work is limited by the physical constraints of both time and space. Besides that, other concerns such as inadequate equipment and safety hazard of laboratory work are also deterring the effectiveness ofthe experiments. An online experiment is aimed to provide analternative approach in implementing laboratory experiments where students can participate interactively and experience physics theories just as they would be taught by textbooks, lectures and labs. Besides that, this project will also lift the limitations faced by the traditional laboratory work. The targeted user for this project ranges from high school students up to university students taking introductory physics courses. The experiment contents were constructed based on basic and simple physics experiment and activities that will provide users with the understanding of the physics concept being taught. Meanwhile, the development ofthe online laboratory is using Adobe Flash and the World Wide Web technology as the platform. A learning theory is followed in order to ensure meaningful learning process takes place. Usability aspect of the system is also given priority in order to develop a user-friendly environment. ADDIE development methodology was followed inthe development ofthe whole system that ensures effective learning process takes place by giving learners what they need. By integrating an excellent pedagogical concept, proven methodologies, interactive multimedia application and web technology, the online physics experiment provides a whole new level of education

Tidal energy generation using the double-emptying system scheme

This paper presents the electrical power generation by using the tidal lagoon system. In general, using tidal concept, water will flow into the dam in one direction, and then water will be forced to be released back into the sea via the low-head one-way generator. In some cases, there is a two-way power generation where power is generated when water from the sea flowing into the dam and one more generation when power is released back into the sea via two different generators. However, in this paper, a new scheme of tidal generation namely Double-Emptying System is proposed where the power can be generated during in flow and out flow, but, by using just one low-head one-way turbine only. The operation of this scheme is explained in detail in the paper. Analysis regarding the potential power production is then executed on the best location in Malaysia; Port Klang. Findings show that by using the proposed technique, the maximum potential mean power can be generated in March whereas the minimum in June, with 9.8926 MW and 6.151 MW, respectively

Online Physics Experiment

The current implementation of traditional hands-on laboratory work is limited by the physical constraints of both time and space. Besides that, other concerns such as inadequate equipment and safety hazard of laboratory work are also deterring the effectiveness ofthe experiments. An online experiment is aimed to provide analternative approach in implementing laboratory experiments where students can participate interactively and experience physics theories just as they would be taught by textbooks, lectures and labs. Besides that, this project will also lift the limitations faced by the traditional laboratory work. The targeted user for this project ranges from high school students up to university students taking introductory physics courses. The experiment contents were constructed based on basic and simple physics experiment and activities that will provide users with the understanding of the physics concept being taught. Meanwhile, the development ofthe online laboratory is using Adobe Flash and the World Wide Web technology as the platform. A learning theory is followed in order to ensure meaningful learning process takes place. Usability aspect of the system is also given priority in order to develop a user-friendly environment. ADDIE development methodology was followed inthe development ofthe whole system that ensures effective learning process takes place by giving learners what they need. By integrating an excellent pedagogical concept, proven methodologies, interactive multimedia application and web technology, the online physics experiment provides a whole new level of education

Modified CHA2DS2-VASc score predicts in-hospital mortality and procedural complications in acute coronary syndrome treated with percutaneous coronary intervention

Background: Current risk prediction models in acute coronary syndrome (ACS) patients undergoing PCI are mathematically complex. This study was undertaken to assess the accuracy of a modified CHA2DS2-VASc score, comprised of easily accessible clinical factors in predicting adverse events. Methods: The National Inpatient Sample (NIS) was queried for ACS patients who underwent PCI between 2010 and 2014. We developed a modified CHA2DS2-VASc score for risk prediction in ACS patients. Multivariate mixed effect logistic regression was utilized to study the adjusted risk for adverse outcomes based on the score. The primary outcome evaluated was in-hospital mortality. Secondary outcomes assessed were stroke, respiratory failure, acute kidney injury, all-cause bleeding, pacemaker insertion, vascular complications, length of stay and cost. Results: There were 252,443 patients admitted with ACS included. Mean age was 62 +/- 12 years. The mean CH3A2DS-VASc score was 1.6 +/- 1.6. The in-hospital mortality rate was 2.5%. CH3A2DS-VASc score was highly correlated with increased rate of mortality and all secondary outcomes. ROC curve analysis for association of CH3A2DS-VASc score with mortality demonstrates that area under the curve (AUC) = 0.83 (95%C: 0.82-0.84). Stepwise increases in CH3A2DS-VASc score correlated with incremental risk, and total score was an independent predictor of mortality (adjusted OR: 1.99 (95%CI: 1.96-2.03) p \u3c 0.001) and all secondary outcomes. Conclusion: This study supports the applicability of the CH3A2DS-VASc score as an accurate risk prediction model for ACS patients undergoing PCI and could supplant more complicated models for quality assurance

Mechanical and morphological properties of bio-phenolic/epoxy polymer blends

Polymer blends is a well-established and suitable method to produced new polymeric materials as compared to synthesis of a new polymer. The combination of two different types of polymers will produce a new and unique material, which has the attribute of both polymers. The aim of this work is to analyze mechanical and morphological properties of bio-phenolic/epoxy polymer blends to find the best formulation for future study. Bio-phenolic/epoxy polymer blends were fabricated using the hand lay-up method at different loading of bio-phenolic (5 wt%, 10 wt%, 15 wt%, 20 wt%, and 25 wt%) in the epoxy matrix whereas neat bio-phenolic and epoxy samples were also fabricated for comparison. Results indicated that mechanical properties were improved for bio-phenolic/epoxy polymer blends compared to neat epoxy and phenolic. In addition, there is no sign of phase separation in polymer blends. The highest tensile, flexural, and impact strength was shown by P-20(biophenolic-20 wt% and Epoxy-80 wt%) whereas P-25 (biophenolic-25 wt% and Epoxy-75 wt%) has the highest tensile and flexural modulus. Based on the finding, it is concluded that P-20 shows better overall mechanical properties among the polymer blends. Based on this finding, the bio-phenolic/epoxy blend with 20 wt% will be used for further study on flax-reinforced bio-phenolic/epoxy polymer blends

Factors associated with nonalcoholic fatty liver disease grades detected by ultrasound at a screening center in Klang Valley, Malaysia

Background: Non-alcoholic fatty liver disease (NAFLD) is a very common liver disease in the world, particularly in Western and developed countries. It is rapidly growing in the Asia- Pacific region. Objectives: This study was designed to determine the association between risk factors and non-alcoholic fatty liver disease grades among Malaysian adults. Patients and Methods: A cross-sectional observational study design was prospectively carried out in this study. Consecutive 628 respondents who attended for a medical checkup at urban health center had been recruited for the study. All respondents had the physical examination, blood tests, clinical assessments, and abdominal ultrasound. A structured self-administered questionnaire has been also used in this study in this survey. Results: From a total of 628 “health screened” subjects, 235 subjects (37.4%) were diagnosed to have non-alcoholic fatty liver disease. Female gender and Chinese race were predominant in our study population. Of those with NAFLD, more than half subjects (63.4) had a moderate grade of non-alcoholic fatty liver disease. The mean age of the study population was 54.54 ±6.69 years. Differences of the mean body mass index (BMI) and waist to hip ratio (WHR) were found to be significant among non-alcoholic fatty liver disease grades (P< 0.001). Similarly, mean triglycerides (TG) and high-densiy lipoprotein-cholesterol (HDL-C) levels had significant differences among non-alcoholic fatty liver disease grades (P< 0.001 and P= 0.016, respectively). Conclusion: the non-alcoholic fatty liver disease is common among urban Malaysian adult population. Anthropometric measurements were closely correlated with non-alcoholic fatty liver disease grades

The Influence of Social Commerce Factors on Customer Intention to Purchase

The rapid development in social commerce creates a new opportunity for businesses. With the use of social technologies they are able to create an environment that is on a socially interactive platform. These social bonds can drive online social support in e-commerce, the result is shown by trusts created and increased intention to use social commerce. This article will examine the factors that triggered consumers’ intention to purchase using social commerce. A total of 184 respondents were chosen for this study to investigate factors that might contribute to customers’ purchasing intention. The findings provide a better understanding on factors that contribute to intention to purchase, which comprise shopping enjoyment, perceived usefulness, trust, security, perceived quality, perceived value, ease of use and transaction convenience. It also suggests that online firms should consider these contextual factors in order to facilitate consumers' adoption behavior

PANC Study (Pancreatitis: A National Cohort Study): national cohort study examining the first 30 days from presentation of acute pancreatitis in the UK

Abstract Background Acute pancreatitis is a common, yet complex, emergency surgical presentation. Multiple guidelines exist and management can vary significantly. The aim of this first UK, multicentre, prospective cohort study was to assess the variation in management of acute pancreatitis to guide resource planning and optimize treatment. Methods All patients aged greater than or equal to 18 years presenting with acute pancreatitis, as per the Atlanta criteria, from March to April 2021 were eligible for inclusion and followed up for 30 days. Anonymized data were uploaded to a secure electronic database in line with local governance approvals. Results A total of 113 hospitals contributed data on 2580 patients, with an equal sex distribution and a mean age of 57 years. The aetiology was gallstones in 50.6 per cent, with idiopathic the next most common (22.4 per cent). In addition to the 7.6 per cent with a diagnosis of chronic pancreatitis, 20.1 per cent of patients had a previous episode of acute pancreatitis. One in 20 patients were classed as having severe pancreatitis, as per the Atlanta criteria. The overall mortality rate was 2.3 per cent at 30 days, but rose to one in three in the severe group. Predictors of death included male sex, increased age, and frailty; previous acute pancreatitis and gallstones as aetiologies were protective. Smoking status and body mass index did not affect death. Conclusion Most patients presenting with acute pancreatitis have a mild, self-limiting disease. Rates of patients with idiopathic pancreatitis are high. Recurrent attacks of pancreatitis are common, but are likely to have reduced risk of death on subsequent admissions. </jats:sec

Mortality of emergency abdominal surgery in high-, middle- and low-income countries

Background: Surgical mortality data are collected routinely in high-income countries, yet virtually no low- or middle-income countries have outcome surveillance in place. The aim was prospectively to collect worldwide mortality data following emergency abdominal surgery, comparing findings across countries with a low, middle or high Human Development Index (HDI). Methods: This was a prospective, multicentre, cohort study. Self-selected hospitals performing emergency surgery submitted prespecified data for consecutive patients from at least one 2-week interval during July to December 2014. Postoperative mortality was analysed by hierarchical multivariable logistic regression. Results: Data were obtained for 10 745 patients from 357 centres in 58 countries; 6538 were from high-, 2889 from middle- and 1318 from low-HDI settings. The overall mortality rate was 1⋅6 per cent at 24 h (high 1⋅1 per cent, middle 1⋅9 per cent, low 3⋅4 per cent; P < 0⋅001), increasing to 5⋅4 per cent by 30 days (high 4⋅5 per cent, middle 6⋅0 per cent, low 8⋅6 per cent; P < 0⋅001). Of the 578 patients who died, 404 (69⋅9 per cent) did so between 24 h and 30 days following surgery (high 74⋅2 per cent, middle 68⋅8 per cent, low 60⋅5 per cent). After adjustment, 30-day mortality remained higher in middle-income (odds ratio (OR) 2⋅78, 95 per cent c.i. 1⋅84 to 4⋅20) and low-income (OR 2⋅97, 1⋅84 to 4⋅81) countries. Surgical safety checklist use was less frequent in low- and middle-income countries, but when used was associated with reduced mortality at 30 days. Conclusion: Mortality is three times higher in low- compared with high-HDI countries even when adjusted for prognostic factors. Patient safety factors may have an important role. Registration number: NCT02179112 (http://www.clinicaltrials.gov)

Générateur de séquences chaotiques

Extension internationale : WO 2014096363(A1) 2014-06-26L'invention concerne un générateur de séquences chaotiques de nombres de valeurs entières représentées sur un nombre de bits prédéterminé, lesdites séquences étant destinées à être utilisées notamment dans des systèmes de cryptage d'informations à base de clé, ledit générateur comportant un nombre m de moyens de mise en oelig; uvre de fonctions non linéaires. Le générateur comporte, en sortie desdits moyens de mise en oeuvre de fonctions non linéaires, des moyens de combinaison aptes à combiner les sorties desdits moyens de mise en oeuvre de fonctions non linéaires par application d'une matrice de diffusion binaire donnée, permettant d'obtenir un nombre m de sorties, chaque sortie étant calculée par une combinaison binaire des sorties desdits moyens de mise en oeuvre de fonctions non linéaires