Development and Adhesion Strength of Plasma-Sprayed Thermal Barrier Coating on the Cast Iron Substrate

In the present scenario, the atmospheric plasma spray is used as a very important and effective weapon to produce the thermal barrier coating (TBC) on the substrate which will impart required surface characteristics to the components which are demanded by the industry. The TBC is used to impart the required characteristic such as wear, corrosion and thermal resistance to the hot section component where these will undergo severe service condition at elevated temperature. Research is carried out to replace the conventional liners in the I.C Engine by the thermal barrier coated ceramic liner. To achieve this, in this work Cast Iron substrate is used and it has been coated with a thermal barrier coating with the help of Atmospheric plasma spraying. These consisting of equal-proportion YSZ and pure alumina as topcoat ceramic material and in-between these topcoat and substrate there will be two bond coat first bond coat is Nickel Iron Aluminium Composite Powder (Metco 452) between the substrate and second bond coat. Second is  Alumina Nickel Aluminide powder blend (Metco 410 NS) between the topcoat and first bond coat. Coatings were subjected to microstructure analysis, porosity and adhesion strength. In this work, top coating thickness ie. 300µm exhibits more percentage of porosity ie.4.2% than other two coating thickness 200 and 100 µm  3.9% and 3.5% respectively. The bond coat will possess porosity percentage of  4.0 %, 3.5 % and 3 % for C3, C2 and C1 respectively. The adhesion strength test of the coatings was conducted and determined by the help of varying the topcoat thickness from 100µm to 300 µm with a step of 100 µm. In this work, it was established that the topcoat with the 100 µm exhibits the very good bond strength 70.81 MPa when compared with other two coating thickness 200µm and 300 µm have the adhesion strength 69.1 MPa and 65.52 MPa respectively. ASTM C 633 standard is used to prepare and conduct the test

Semiconducting Metal Oxide Based Sensors for Selective Gas Pollutant Detection

A review of some papers published in the last fifty years that focus on the semiconducting metal oxide (SMO) based sensors for the selective and sensitive detection of various environmental pollutants is presented

Critical care service delivery across healthcare systems in low-income and low-middle-income countries: protocol for a systematic review

Introduction- Critical care in low-income and low-middle income countries (LLMICs) is an underdeveloped component of the healthcare system. Given the increasing growth in demand for critical care services in LLMICs, understanding the current capacity to provide critical care is imperative to inform policy on service expansion. Thus, our aim is to describe the provision of critical care in LLMICs with respect to patients, providers, location of care and services and interventions delivered. Methods and analysis- We will search PubMed/MEDLINE, Web of Science and EMBASE for full-text original research articles available in English describing critical care services that specify the location of service delivery and describe patients and interventions. We will restrict our review to populations from LLMICs (using 2016 World Bank classifications) and published from 1 January 2008 to 1 January 2020. Two-reviewer agreement will be required for both title/abstract and full text review stages, and rate of agreement will be calculated for each stage. We will extract data regarding the location of critical care service delivery, the training of the healthcare professionals providing services, and the illnesses treated according to classification by the WHO Universal Health Coverage Compendium. Ethics and dissemination- Reviewed and exempted by the Stanford University Office for Human Subjects Research and IRB on 20 May 2020. The results of this review will be disseminated through scholarly publication and presentation at regional and international conferences. This review is designed to inform broader WHO, International Federation for Emergency Medicine and partner efforts to strengthen critical care globally

Student Perspectives on Managing Sickle Cell Disease at School

Objective The study objective was to identify the perceptions of children with sickle cell disease (SCD) in the school environment. Methods Semistructured interviews (N = 14) were conducted with pediatric patients ages 6 to 10 who attended Metro Nashville Public Schools. These participants were recruited through the Vanderbilt Sickle Cell Disease Clinic. Participants were asked about the perceived efficacy of their teachers to (1) understand SCD; (2) communicate with students regarding SCD; (3) handle an SCD-related pain episode in school; and (4) identify methods to compensate for school absenteeism associated with an SCD diagnosis. Content analysis identified underlying themes. Results Five themes emerged that highlighted the perceptions and recommendations of children with SCD in the school environment: (1) perceptions that allow students to prevent SCD from limiting their school experience; (2) administrator actions to alleviate challenges associated with SCD; (3) communication about SCD; (4) how SCD interferes with school activities; and (5) ways students advocate for themselves. Students also provided four areas of recommendations for school personnel: (1) ways teachers can help with school activities; (2) make-up work for school absences; (3) empowering students with SCD; and (4) helping with SCD episodes at school. Conclusions Students with SCD advocated strongly for their needs at school to attain their education. However, they perceived school personnel to lack knowledge about SCD management. This could be overcome with a handbook specific for teachers of students with SCD that could address each of the five themes