The determination of the elastic modulus of the structural thermoplastic polymers is especially required during in-service monitoring of the components. This elasticity modulus determination can simplify the inspection process and predict the lifetime of the polymer being used. The elastic modulus of the polymer can be determined by pulse-echo method testing ultrasonic which is easier to use than transmission method. This research aims to determine elastic modulus of thermoplastic polymers i.e. polymethylmethaacrylate (acrylic), polyamide (nylon) and low density polyethylene (LDPE) calculated from measurement of velocity and attenuation of ultrasonic pulse-echo. The research begins by looking at the effect of the use of three different probes to ultrasonic velocity readings. Then elastic modulus of material polymers from ultrasonic velocity was calculated using standard equation. The elastic modulus was compared with the elastic modulus from mechanical testing. A linear model elastic modulus from ultrasonic reading which consists of velocity and apparent attenuation was developed. The results were elastic modulus value obtained from ultrasonic velocity and standard equation had a profound error 98% to 158%, especially for polymer with an eminently low density and high ratio of viscous property to elastic property. The attenuation from ultrasonic reading was influenced by the viscoelastic properties and the elastic modulus from ultrasonic velocity reading was influenced by the density. A linear model for thermoplastic elastic modulus determination based on ultrasonic pulse echo testing has been developed and could reduced the error to 3.45%.

Initial research on SARS-COV 2 (Severe Acute Respiratory Syndrome Coronavirus 2) appeared to demonstrate that children infected with the virus remained asymptomatic or had only mild to moderate conditions. The most common symptoms were fever and cough. However, in a later phase of the pandemic, numerous other aspects of clinical presentation in the pediatric public were observed, especially gastrointestinal conditions. In the present study, patients monitored at the Pediatric Intensive Care Unit of the Hospital Estadual Adão Pereira Nunes from April 17, 2020 until June 17, 2020, who had detectable PCR-RT (Polymerase Chain Reaction -Trasncriptase) or positive serology for COVID 19 (Coronavirus disease 19). This is a hospital unit that is not a reference for COVID 19, and its target audience is trauma victims.The initial symptoms of most hospitalized patients with clinical suspicion were fever and gastrointestinal symptoms, with significant abdominal pain standing out, mimicking acute abdomen. Signs and symptoms that differ from adults, who have respiratory manifestations as a starting point. Based on the recognition of the different clinical presentations of SARS-COV 2 in the pediatric population, an early diagnosis is possible, with better conduction and outcome.

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Problem statement: The Shewhart and S control charts, in the literature, were combined to evaluate the stability of a process. These charts were based on the fundamental assumption of normality of the quality characteristics under investigation. Approach: In practice, the normality assumption was often violated by real life data, therefore, use of the Shewhart and S control charts on real life data might leads to misplacement of control limits. There were many alternatives in the literature to handle non-normality of quality characteristics. The Median Absolute Deviation (MAD) claimed in the literature to be the best estimate when the data under consideration is non-normal. Thus in this study, we derived the control limits for the-control chart using the median absolute deviation for monitoring process stability when the quality characteristic under investigation was non-normal. Results: The derived control limits were compared with the control limits when the sample standard deviation was used as a measure of controlling the process variability using manufacturing process (real life) data. Furthermore, a simulation study was carried out to evaluate the performance of the proposed MAD based control charts on both normal and non-normal process. Conclusion: The obtained results show that the derived control limit is an improvement on the control limit of the Shewhart and that the MAD control charts performed better for non-normal process than for normal process

Purpose: This paper tests the generalizability and veracity of an extended version of the original consumer styles inventory (CSI) framework for an under examined context, secondhand clothing consumption in Poland. Design/Methodology/Approach: From the extant literature on retail fashion consumption in Poland, the CSI framework is newly extended to include four additional 'styles' for secondhand clothing, with four respective hypotheses formulated to test. A total of 509 questionnaires were commissioned by the Brand Experience Research Agency in Poland in July 2016. The target sample comprised a mixed sample almost evenly distributed between female (52.7%-268 responses) and male (47.3%-241 responses) participants. A representative sample of consumers geographically, with a majority living in cities across Poland between 50.000 and 500.000 inhabitants, was accessed. Findings: The results confirm that the original CSI framework is partially accepted within the Polish market, with overall results supporting a modified version of the inventory. The reported results highlight that there are some distinct cultural differences when applying the Consumer Styles Inventory in Poland, an overall finding that is synonymous with other international CSI studies. It can be concluded that consumers in emerging markets are to some extent different to those in developed markets, due to a variety of social as well as cultural and economic factors. Practical Implications: For Polish consumers, the purchase of secondhand garments appears to be a reflection, to follow shortcuts to pursue Western European patterns, where clothing is a form of resistance to purchasing newly produced mainstream fashion. Originality/Value: This research newly extends the CSI framework to incorporate additional shopper styles for Polish consumers. Furthermore, this study contributes to the body of research within the CSI remit by adding results for an additional country, which has been examined rarely before.