Powered Respirators Are Effective, Sustainable, and Cost-Effective Personal Protective Equipment for SARS-CoV-2

Objectives: The provision of high-quality personal protective equipment (PPE) has been a critical challenge during the COVID-19 pandemic. We evaluated an alternative strategy, mass deployment of a powered air-purifying respirator (PeRSo), in a large university hospital.Methods: We performed prospective user feedback via questionnaires sent to healthcare workers (HCWs) issued PeRSos, economic analysis, and evaluated the real-world impact.Results: Where paired responses were available, PeRSo was preferred over droplet precautions for comfort, patient response, overall experience, and subjective feeling of safety. For all responses, more participants reported the overall experience being rated “Very good” more frequently for PeRSo. The primary limitation identified was impairment of hearing. Economic simulation exercises revealed that the adoption of PeRSo within ICU is associated with net cost savings in the majority of scenarios and savings increased progressively with greater ITU occupancy. In evaluation during the second UK wave, over 3,600 respirators were deployed, all requested by staff, which were associated with a low staff absence relative to most comparator hospitals.Conclusions: Health services should consider a widespread implementation of powered reusable respirators as a safe and sustainable solution for the protection of HCWs as SARS-CoV-2 becomes an endemic viral illness.

LONG-TERM PHOTOMETRY WITH SKYNET ROBOTIC TELESCOPE NETWORK

In this paper, we describe the Skynet Robotic Telescope Network, a network of about 2 dozen small optical telescopes spanning four continents. For a prospective user of the network, we provide details on its operation and mention certain caveats potentially affecting observations taken under the control of Skynet software. The actual performance of the network is demonstrated by long-term observations of two blazars: OJ 49 and 3C 279. We show their photometric light curves acquired with a subset of Skynet telescopes in the 2018/19 observing seasons. Preliminary results of the analysis of the variability of these two targets are given, including the quantitative properties of light variations and the periods of possible Quasi Periodic Oscillations (QPOs) found in the seasonal light curves.

Pengembangan Media Permainan Simulasi Jujur Tantangan untuk Meningkatkan Penyesuaian Sosial Siswa SMP Laboratorium UM Malang

The purpose of this research development is to generating an honest challenge simulation game product to increasing students social adjustment. The steps development in this research are adjusted to the research needs, namely (1) data collection (2) planning (3) development of the initial product draft (4) expert testing (5) product revision after expert testing (6) prospective user testing (7) revision the final product. Experts and prospective product users are analyzed using inter-rater agreement models (Gregory, 2011). Test validity index subject matter experts, media and prospective product users showed very high criteria. These products meet very precise criteria, very useful, very easy and very attractive to mean very feasible to use. Based on the test can be concluded that the simulation game of honest challenge to increase the social adjustment of junior high school have met the acceptance criteria. Abstrak: Tujuan dari penelitian ini adalah untuk menghasilkan produk permainan simulasi jujur tantangan untuk meningkatkan penyesuaian sosial siswa. Langkah pengembangan dalam penelitian ini disesuaikan dengan kebutuhan penelitian yaitu (1) pengumpulan data (2) perencanaan (3) pengembangan draft produk awal (4) uji coba ahli (5) revisi produk setelah uji ahli (6) uji calon pengguna (7) revisi produk akhir. Uji ahli dan uji calon pengguna dianalisis menggunakan inter-rater agreement model (Gregory, 2011). Indeks validitas uji ahli materi, media dan calon pengguna produk menunjukkan kriteria sangat tinggi. Produk ini memenuhi kriteria sangat tepat, sangat berguna, sangat mudah dan sangat menarik sehingga bermakna sangat layak untuk digunakan. Berdasarkan uji tersebut dapat disimpulkan bahwa media permainan simulasi jujur tantangan untuk meningkatkan penyesuaian sosial siswa SMP telah memenuhi kriteria keberterimaan.

Pengembangan Media Biblioedukasi Buku Cerita “Scars Make You Strong” untuk Meningkatkan Self-Esteem Anak di Pondok Tahfidz Quran LAZNAS Nurul Hayat Malang

This research aims to develop educational bibliographic media "Scars Make You Strong" to Increase Self-Esteem of children in Pondok Tahfidz Quran LAZNAS Nurul Hayat Malang. This study was developed to help facilitate counseling teachers in providing group guidance interventions using bibli education techniques. The scope of this research is the bibliographic media of the story book "Scars Make You Strong" to increase the self-esteem of the adolescent children. This study uses the model Research and Development (R&D) developed by Borg and Gall (1983) with the following steps: data collection, planning, product development, testing (BK material expert & media expert), revision of the results of expert testing and candidate testing users, revised trial results, and the final product. Expert testing and field testing of prospective users were analyzed using quantitative data analysis using the formula average (mean) and qualitative data analysis. The validity index of expert and prospective user tests shows high criteria and meets acceptability, namely usability, accuracy, convenience, and attractiveness, so that the product is feasible and can be given to prospective users of story books, namely children in the cottage, and guidebooks for use for counseling teachers / guidance teachers. Abstrak: Penelitian ini bertujuan untuk mengembangkan media biblioedukasi Buku Cerita Bergambar “Scars Make You Strong” untuk Meningkatkan Self-Esteem anak di Pondok Tahfidz Quran LAZNAS Nurul Hayat Malang. Penelitian ini dikembangkan guna membantu memudahkan guru BK dalam pemberian intervensi bimbingan kelompok menggunakan teknik biblioedukasi. Ruang lingkup dalam penelitian ini adalah media biblioedukasi buku cerita “Scars Make You Strong” untuk meningkatkan self-esteem anak pondok. Penelitian ini menggunakan model Research and Development (R&D) yang dikembangkan oleh Borg dan Gall (1983) dengan langkah : melakukan pengumpulan data, perencanaan, pengembangan produk, uji coba (ahli materi BK & ahli media), revisi dari hasil uji ahli dan uji calon pengguna, revisi hasil uji coba, serta produk akhir. Uji ahli dan uji lapangan calon pengguna dianalisis menggunakan analisis data kuantitatif menggunakan rumus rata-rata (mean) dan analisis data kualitatif. Indeks validitas uji ahli dan calon pengguna menunjukkan kriteria yang tinggi dan memenuhi akseptabilitas yakni kegunaan, ketepatan, kemudahan, dan kemenarikan, sehingga produk layak dan dapat diberikan pada calon pengguna buku cerita yakni anak di pondok, dan buku panduan penggunaannya untuk guru BK/guru pembina.

Pengembangan Panduan Sosiodrama untuk Meningkatkan Kecerdasan Interpersonal Siswa SMP Negeri 1 Ngoro

Abstrak: The aim of this research is to produce a sociodrama guidebook to improve interpersonal intelligence of SMP Negeri 1 Ngoro students. The method used is research and development which adapts Borg and Gall's development model. This development model consists of five steps to the product revision stage after an assessment is carried out by 1 material expert test, 1 media expert test, and 1 prospective user test (counselor). The data collection technique was carried out by interviewing with 1 counselor and distributing an inventory of interpersonal intelligence to 32 students. The data analysis used was quantitative and qualitative data analysis. The results of the evaluation of the material expert test got an average total of 3.7, the media expert test got an average total of 3.9 and the prospective user test (counselor) got an average score of 3.9. Based on the expert's judgment that the manual is suitable for use. Abstrak: Penelitian ini bertujuan untuk menghasilkan panduan sosiodrama untuk meningkatkan kecerdasan interpersonal siswa SMP Negeri 1 Ngoro. Metode yang digunakan adalah penelitian dan pengembangan yang mengadaptasi model pengembangan Borg dan Gall. Model pengembangan ini terdiri dari lima langkah sampai tahap revisi produk setelah dilakukan penilaian oleh 1 uji ahli materi, 1 uji ahli media, dan 1 uji calon pengguna (konselor). Teknik pengumpulan data dilakukan dengan wawancara bersama 1 konselor dan menyebar inventori kecerdasan interpersonal kepada 32 siswa. Analisis data yang digunakan adalah analisis data kuantitatif dan kualitatif. Hasil penilaian uji ahli materi mendapat total rata-rata sebesar 3,7 uji ahli media mendapat total rata-rata sebesar 3,9 dan uji calon pengguna (konselor) mendapat skor rata-rata sebesar 3,9. Berdasarkan penilaian dari ahli bahwa buku panduan tersebut layak digunakan.

Phenomenological technique for prediction of cavitation erosion performance

Purpose: Major aim of the work was to formulate 2-parameters models of the cavitation erosion process and to bring about the particular methods for prediction of its performance with due calculation formulas. Design/methodology/approach: Phenomenological model of the erosion supplemented with functional relationships between calculation parameters and the strength parameters stand for the foundations of the method. Having assumed the probabilistic nature of the process and fatigue regime of the material destruction, the volume loss in time has been determined as proportional to the integral of the appropriate probability function. Correlations between parameters have been derived by adjusting the computed erosion curves to the experimental ones for the vast diversity of the cases. Findings: Two different formulas for the volume loss of the material in time under cavitation loading have been derived. Research limitations/implications: Results obtained from both the International Cavitation Erosion Test program as well as the own experiments carried out at the rotating disk set-up supplied necessary experimental data. Preliminary verification of the method soundness was completed. Assumption on the independence of the calculation parameters on the loading conditions have been taken. The approach is valid provided the defined relationships are also independent on the type and amplitude of the loading. Practical implications: Achieving the objectives is expected to result in developing a technique for assessment of the material damage under cavitation loadings. Numerical implementation of the model completed with the derived functional relationships stand for a tool, enabling a prospective user to predict the material performance under defined cavitation loading. Originality/value: New formulas for calculating the efficiency of cavitation erosion, inferred from the models of high physical clarity are the original contribution to the methodology and techniques concerned.