70 research outputs found

    Earth and environmental science in the 1980's: Part 1: Environmental data systems, supercomputer facilities and networks

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    Overview descriptions of on-line environmental data systems, supercomputer facilities, and networks are presented. Each description addresses the concepts of content, capability, and user access relevant to the point of view of potential utilization by the Earth and environmental science community. The information on similar systems or facilities is presented in parallel fashion to encourage and facilitate intercomparison. In addition, summary sheets are given for each description, and a summary table precedes each section

    Integrating legacy mainframe systems: architectural issues and solutions

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    For more than 30 years, mainframe computers have been the backbone of computing systems throughout the world. Even today it is estimated that some 80% of the worlds' data is held on such machines. However, new business requirements and pressure from evolving technologies, such as the Internet is pushing these existing systems to their limits and they are reaching breaking point. The Banking and Financial Sectors in particular have been relying on mainframes for the longest time to do their business and as a result it is they that feel these pressures the most. In recent years there have been various solutions for enabling a re-engineering of these legacy systems. It quickly became clear that to completely rewrite them was not possible so various integration strategies emerged. Out of these new integration strategies, the CORBA standard by the Object Management Group emerged as the strongest, providing a standards based solution that enabled the mainframe applications become a peer in a distributed computing environment. However, the requirements did not stop there. The mainframe systems were reliable, secure, scalable and fast, so any integration strategy had to ensure that the new distributed systems did not lose any of these benefits. Various patterns or general solutions to the problem of meeting these requirements have arisen and this research looks at applying some of these patterns to mainframe based CORBA applications. The purpose of this research is to examine some of the issues involved with making mainframebased legacy applications inter-operate with newer Object Oriented Technologies

    Drones and the Creative Industry

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    This open access, interdisciplinary book presents innovative strategies in the use of civil drones in the cultural and creative industry. Specially aimed at small and medium-sized enterprises (SMEs), the book offers valuable insights from the fields of marketing, engineering, arts and management. With contributions from experts representing varied interests throughout the creative industry, including academic researchers, software developers and engineers, it analyzes the needs of the creative industry when using civil drones both outdoors and indoors. The book also provides timely recommendations to the industry, as well as guidance for academics and policymakers

    UMSL Bulletin 2019-2020

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    The University Bulletin/Course Catalog 2019-2020 Edition.https://irl.umsl.edu/bulletin/1083/thumbnail.jp

    UMSL Bulletin 2020-2021

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    The 2020-2021 Bulletin and Course Catalog for the University of Missouri St. Louis.https://irl.umsl.edu/bulletin/1084/thumbnail.jp

    UMSL Bulletin 2018-2019

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    The University Bulletin/Course Catalog 2018-2019 Edition.https://irl.umsl.edu/bulletin/1082/thumbnail.jp

    Утицај површинских процеса на струјно-напонску карактеристику органских соларних ћелија

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    Organic solar cells (OSCs) are emerging low-cost, easy production photovoltaics. Their efficiency is strongly affected by the interface physics that needs to be researched. In this thesis, the interface physics of metal/inorganic semiconductor and metal/organic semiconductor contacts is considered. The basic structures and operation principles of OSCs are reviewed and a detailed description of the drift-diffusion model (DDM) used for modeling the OSCs is included. An extensive and detailed literature review of different physical effects that can cause the S-kink appearance in the current density-voltage (J-V) characteristics of OSCs is presented. The original research results on ITO/(poly(3,4‒ethilenedioxythiophene):poly (styrenesulfonate))PEDOT:PSS/(poly(3‒hexylthiophene))P3HT:(1‒(3‒methoxycarbonyl)propyl‒1‒phenyl‒[6,6]‒methanofullerene) PCBM/Al and ITO/PEDOT:PSS/P3HT:(indene‒C60 bisadduct) ICBA/Al solar cells are presented and discussed. The influence of the surface processes on the shape of OSCs’ J-V characteristics has been investigated by DDM. The surface recombination and thermal injection of charge carriers on the anode and cathode are taken into account through boundary conditions. It is deduced that there are two different types of S-shape deviations in OSCs' J-V characteristics, one arises from the reduced surface recombination velocities (SRVs), and the other is attributed to the large (>0.2eV) injection barrier height for electrons. The measured J-V characteristics of ITO/PEDOT:PSS/P3HT:PCBM/Al and ITO/PEDOT:PSS/P3HT:ICBA/Al solar cells are reproduced well by the DDM. It is anticipated that the S-shaped J-V curves of ITO/PEDOT:PSS/P3HT:ICBA/Al solar cells originate from the large electron barrier height on the cathode, rather than by the reduction of the SRVs.Органске соларне ћелије су јефтине фотоволтаичне направе лаке производње. Њихова ефикасност јако зависи од контактне физике на електродним спојевима коју треба истражити. У овој тези, у уводном делу, разматрана је физика на споју метала и неорганског полупроводника, као и на споју метала и органског полупроводника. Представљене су основне структуре и описан је принцип рада органских соларних ћелија (ОСЋ), а дрифт-дифузиони модел (ДДМ) који се користи за моделовање ОСЋ је детаљно размотрен. Саставни део дисертације је и опсежан преглед литературе на тему различитих физичких ефеката који могу проузроковати појаву S-девијације струјно-напонске (I-V) карактеристике ОСЋ. Спроведено је оригнално истраживање на ITO/(poly(3,4‒ethilenedioxythiophene):poly (styrenesulfonate))PEDOT:PSS/(poly(3‒hexylthiophene))P3HT:(1‒(3‒methoxycarbonyl)propyl‒1‒phenyl‒[6,6]‒methanofullerene) PCBM/Al and ITO/PEDOT:PSS/P3HT:(indene‒C60 bisadduct) ICBA/Al соларним ћелијама и добијени резултати су представљени и продискутовани. Утицај површинских процеса на облик I-V карактеристике ОСЋ је испитан помоћу ДДМ. Површинска рекомбинација и термичка инјекција носилаца наелектрисања на аноди и катоди узете су у обзир кроз граничне услове. Закључено је да постоје две различите врсте S-девијације I-V криве ОСЋ. Прва врста потиче од редукованих брзина површинске рекомбинације (БПР) док се друга врста може приписати великој висини инјекционе баријере (>0,2eV) за електроне. Измерене I-V карактеристике ITO/PEDOT:PSS/P3HT:PCBM/Al и ITO/PEDOT:PSS/P3HT:ICBA/Al соларних ћелија су добро репродуковане помоћу ДДМ. Утврђено је да S-девијација I-V кривих ITO/PEDOT:PSS/P3HT:ICBA/Al соларних ћелија потиче од велике висине инјекционе баријере за електроне на катоди, а не од редукованих БПР

    UMSL Bulletin 2021-2022

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    The 2021-2022 Bulletin and Course Catalog for the University of Missouri St. Louis. This is the July 1, 2021 pdf snapshot version of the University Bulletin and Course Catalog.https://irl.umsl.edu/bulletin/1086/thumbnail.jp
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