Direct observation of high-speed plasma outflows produced by magnetic reconnection in solar impulsive events

Spectroscopic observations of a solar limb flare recorded by SUMER on SOHO reveal, for the first time, hot fast magnetic reconnection outflows in the corona. As the reconnection site rises across the SUMER spectrometer slit, significant blue- and red-shift signatures are observed in sequence in the Fe XIX line, reflecting upflows and downflows of hot plasma jets, respectively. With the projection effect corrected, the measured outflow speed is between 900-3500 km/s, consistent with theoretical predictions of the Alfvenic outflows in magnetic reconnection region in solar impulsive events. Based on theoretic models, the magnetic field strength near the reconnection region is estimated to be 19-37 Gauss.Comment: 5 pages, 6 color figures, 1 animation onlin

A transient PEMFC model with CO poisoning and mitigation by O2 bleeding and Ru-containing catalyst

In this paper we present a transient, fully two-phase, non-isothermal model of carbon monoxide poisoning and oxygen bleeding in the membraneelectrode assembly of a polymer electrolyte fuel cell. The model includes a detailed description of mass, heat and charge transport, chemisorption,electrochemical oxidation and heterogeneous catalysis (when oxygen is introduced). Example simulation results demonstrate the ability of themodel to qualitatively capture the fundamental features of the poisoning process and the extent of poisoning with respect to channel temperatureand concentration. Further examples show how the multi-step kinetics can interact with other physical phenomena such as liquid-water flooding,particularly in the anode. Carbon monoxide pulsing is simulated to demonstrate that the complicated reaction kinetics of oxygen bleeding canbe captured and even predicted. It is shown that variations in the channel temperature have a convoluted effect on bleeding, and that trends inperformance on relatively short time scales can be the precise opposite of the trends observed at steady state. We incorporate a bi-functionalmechanism for carbon monoxide oxidation on platinum–ruthenium catalysts, demonstrating the marked reduction in the extent of poisoning, theeffect of variations in the platinum–ruthenium ratio and the influence of temperature. Finally, we discuss the implications of the results, extensionsto the model and possible avenues for experimental work

Opening Up OpenStack’s Identity Service

OpenStack is a relatively new open source cloud computing project. It has rapidly become very popular since its first release on 21st October 2010. It has thousands of members, comprising technologists, developers, researchers, and cloud computing experts from 87 countries and more than 140 organisations. Despite is openness until the University of Kent started to work with OpenStack, its Keystone identity service had no federated identity management capabilities, and all user accounts and passwords had to be stored in Keystone, usually in a backend LDAP directory. This talk will describe the way that protocol independent federated access has been integrated into the core release of Keystone

Perancangan Sistem Informasi Pengaduan Pelanggan Bagian Cater PT Pln Cabang Upj Bekasi Kota

Article discusses the design of user complaint information system on Cater PLN Company Branch UPJ CityBekasi. The design systems consist of complaint acceptance module, scheduled module, field team determinationmodule, and complaint report module. This information system application program testing of user complaint isusing black-box testing method. Black-box testing method was done by giving a number of inputs to the applicationprogram that later processed suitable with the functional needs to produce the needed output. The research resultis the program able to give information about the complaint faster, accurate, and up to date compared to the use ofmanual document

INDUSTRY-ACADEMIA COLLABORATION: MEETING UNDERGRADUATE ENGINEERS’ EMPLOYMENT NEEDS

Purpose of the study: The aim of this study is to investigate undergraduate engineers’ perceptions on the industrial collaboration program. Methodology: This study used both quantitative and qualitative methods of analysis. Based on purposive sampling, 150 undergraduate engineers were selected and were required to complete a questionnaire and participate in focus group interviews. Numerical data obtained using the questionnaire were tabulated based on frequencies and percentages. Thematic analysis was performed to identify patterns that emerged from the focus group interview transcripts. Main findings: Study findings indicate a positive trend in students’ perceptions on the benefits of the program besides indicating a gap in their ability and competency. Thematic analysis based on the focus group interviews reveal three emerging themes which indicate that the respondents found the program to have boosted their confidence, besides being useful and meaningful. Applications of this study: This study contributes to the design of English for Specific Purposes (ESP) curriculum, specifically for engineers. ESP curriculum design as well as teaching and learning should include industry leaders’ intervention. Novelty/Originality of this study: This study will be the entry point for employer engagement in teaching and learning as well as in ESP curriculum development for engineers in the context of a technical university