Solar hydrogen system for cooking applications: Experimental and numerical study

This paper describes the development of a semi-empirical numerical model for a solar hydrogen system consisting of a proton exchange membrane electrolyser (PEM) powered by photovoltaic panels to produce hydrogen as fuel for cooking applications, focussing on Jamaica as a suitable case-study. The model was developed in TRNSYS and includes a novel numerical component based on FORTRAN to model the operation of the PEM electrolyser. The numerical component was developed based on operational data from a purpose constructed small-scale experimental rig. The numerical model was calibrated using data from the experimental rig powered by operational data from a photovoltaic panel system in the UK and predicted photovoltaic panel power data from Jamaica. For the test conditions, experiments indicated an electrolysis maximum efficiency of 63.6%. The calibrated model was used to develop a case study analysis for a small community in Jamaica with a daily cooking demand of 39.6kWh or 1.7kg of H2 gas. Simulations indicate that the H2 production plan is sufficient for the cooking needs of the case-study.This project is partly funded by ACP Caribbean & Pacific Research Programme for Sustainable Development of the European Union (EuropeAid/130381/D/ACT/ACP)

Mortality and pulmonary complications in patients undergoing surgery with perioperative SARS-CoV-2 infection: an international cohort study

Background: The impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on postoperative recovery needs to be understood to inform clinical decision making during and after the COVID-19 pandemic. This study reports 30-day mortality and pulmonary complication rates in patients with perioperative SARS-CoV-2 infection. Methods: This international, multicentre, cohort study at 235 hospitals in 24 countries included all patients undergoing surgery who had SARS-CoV-2 infection confirmed within 7 days before or 30 days after surgery. The primary outcome measure was 30-day postoperative mortality and was assessed in all enrolled patients. The main secondary outcome measure was pulmonary complications, defined as pneumonia, acute respiratory distress syndrome, or unexpected postoperative ventilation. Findings: This analysis includes 1128 patients who had surgery between Jan 1 and March 31, 2020, of whom 835 (74·0%) had emergency surgery and 280 (24·8%) had elective surgery. SARS-CoV-2 infection was confirmed preoperatively in 294 (26·1%) patients. 30-day mortality was 23·8% (268 of 1128). Pulmonary complications occurred in 577 (51·2%) of 1128 patients; 30-day mortality in these patients was 38·0% (219 of 577), accounting for 81·7% (219 of 268) of all deaths. In adjusted analyses, 30-day mortality was associated with male sex (odds ratio 1·75 [95% CI 1·28–2·40], p\textless0·0001), age 70 years or older versus younger than 70 years (2·30 [1·65–3·22], p\textless0·0001), American Society of Anesthesiologists grades 3–5 versus grades 1–2 (2·35 [1·57–3·53], p\textless0·0001), malignant versus benign or obstetric diagnosis (1·55 [1·01–2·39], p=0·046), emergency versus elective surgery (1·67 [1·06–2·63], p=0·026), and major versus minor surgery (1·52 [1·01–2·31], p=0·047). Interpretation: Postoperative pulmonary complications occur in half of patients with perioperative SARS-CoV-2 infection and are associated with high mortality. Thresholds for surgery during the COVID-19 pandemic should be higher than during normal practice, particularly in men aged 70 years and older. Consideration should be given for postponing non-urgent procedures and promoting non-operative treatment to delay or avoid the need for surgery. Funding: National Institute for Health Research (NIHR), Association of Coloproctology of Great Britain and Ireland, Bowel and Cancer Research, Bowel Disease Research Foundation, Association of Upper Gastrointestinal Surgeons, British Association of Surgical Oncology, British Gynaecological Cancer Society, European Society of Coloproctology, NIHR Academy, Sarcoma UK, Vascular Society for Great Britain and Ireland, and Yorkshire Cancer Research

20th Winter Workshop on Nuclear Dynamics

BRAHMS results in the context of saturation and quantum evolutio

Workshop on Global Market Integration and the Agri-Food Sector 25-27 Mar 1998

112 páginas pdf.Este informe incluye, en la medida de lo posible, el texto completo de las presentaciones y documentos con los principales temas que surgen de las discusiones. Es nuestra esperanza que la información contenida en este documento sustente los objetivos del taller definidos anteriormente, en particular leyendo la necesidad de desarrollar la base de información necesaria para permitir la participación efectiva de nuestros países en los procesos de integración global y hemisférica.This report includes, as far as is posible, the full text of the presentations and documentos the main issues arising out of discussions. It it our hope that the information contained in this document will sustain the above-defined workshop objetives, particularly reading the need for developing the necessary information base to enable the effective participation of our countries in the global and hemispheric integration proceses

Technical and financial report on the Cropping Systems (Jamaica) Project, Phase II

Photocop

Caribbean government science advice workshop, February 20-21, 2018 : technical report

This report reviews the design, planning, execution and main outcomes of the International Network for Government Science Advice (INGSA) at the Caribbean Capacity Building Workshop held in Kingston, Jamaica. The objective was to strengthen the capacity and mechanisms for embedding scientific advice in public policy-making process in the Commonwealth Caribbean. Participants were 40 emerging and established scientists and policy makers from the region, for dialogue on the national and regional science-policy interface.Jamaica National Commission on Science and TechnologyRoyal Society LondonUnited Nationals Educations, Scientific and Cultural Organization (UNESCO)University of the West IndiesNational Foundation for the Development of Science and Technolog

What is a principal's quality mark? Issues and challenges in leadership progression among primary teachers in Jamaica

Perceptions about teacher progression among Jamaica's primary school teachers should force society to stop and ask itself several questions. Are these perceptions accurate? If not, how did these perceptions emerge and what can national leaders and those in positions of authority do to ‘manage’ if not resolve these perceptions? If there is any truth to them, a different set of questions needs to be asked. How did things come to be like this? How can the perception of corruption and mistrust be minimised? What will be done differently going forward? Either way, there is a more fundamental question: Do the current perceptions among teachers mirror perceptions in other areas of the public service? The answers to these questions are not easy. The findings being reported in this article form part of a small-scale qualitative exploratory study aimed at identifying and understanding the perceptions of primary school teachers in Jamaica as regards progression to the rank of principal. The findings point to a number of perceived barriers including religious affiliation, political affiliation, interference, and social connections. This article proposes that promotion on any basis other than merit is problematic and does not promote trust, openness and transparency; nor does it build confidence in those who are part of the system, but themselves do not have such connections and/or affiliations

Asia Pacific directory of information systems researchers, 1994

Cilj rada je analizirati postupak obiteljske medijacije u hrvatskom pravnom sustavu. U radu se polazi od analize alternativnog rješavanja postupka, razvoja metoda obiteljske medijacije i usporedbe postupka mirenja i obiteljske medijacije. U nastavku se analizira utjecaj dokumenata Vijeća Europe i Europske Unije na mirenje i obiteljsku medijaciju. Potom se prelazi na razvoj obiteljske medijacije u hrvatskom zakonodavstvu te se analizira kako je tekao taj razvoj i na koji način su međunarodni dokumenti na njega utjecali. Na kraju slijedi analiza trenutnog postupka obveznog savjetovanja i obiteljske medijacije. Zaključno se ističe koji su nedostaci trenutnog sustava te koji su pozitivni pomaci učinjeni u odnosu na prethodno uređenje mirnog rješavanja obiteljskih sporova.The aim of this thesis is to analyze the procedure of family mediation in the Croatian legal system. The paper starts with an analysis of alternative dispute resolution, development of family mediation methods and comparison of the mediation and family mediation procedure. The impact of Council of Europe and European Union documents on reconciliation and family mediation is analyzed below. Further in paper it moves on to the development of family mediation in Croatian lawmaking and analyzes how this development took place and how international documents influenced it. Finally, an analysis of the current compulsory counseling and family mediation process follows. In conclusion, it highlights the shortcomings of the current system and what positive developments have been made compared to the previous settlement of family dispute settlement