5,144 research outputs found
ELECTROCHEMICAL STUDIES OF COPOLYMERS OF 3- PHENYL[5]FERROCENOPHANE-1,5-DIMETHYLENE AND VARIOUS PARA-SUBSTITUTED N-PHENYLMALEIMIDES
Ferrocene is an organometallic compound that consists of an iron atom sandwiched between two cyclopentadienyl rings. It has well understood redox properties and has been extensively studied making it useful in electrical systems. In this research alternating copolymers were synthesized via free radical polymerization from 3-phenyl[5]ferrocenophane-1,5-dimethylene and various para-substituted N-phenylmaleimides. Copolymers between this ferrocenophane and N-substituted maleimides have shown interesting electrical properties and the potential for charge transfer interactions between ferrocene and maleimide moieties. In this work, four new polymers were synthesized with differing electron withdrawing or donating groups on the para-position of the N-phenylmaleimide in order to influence potential for charge transfer complex formation. These polymers were characterized using 1H-NMR, 13C-NMR and FTIR spectroscopy. Thermogravimetric analysis of polymers showed them to be thermostable to approximately 380⁰C. Cyclic voltammetry of polymer solutions and thin films revealed electrochemical reversibility of the materials. UV-vis spectroscopy was used to study charge transfer complex formation. Weak absorbencies in the visible spectrum by polymer thin films suggest electrostatic interactions between ferrocenyl and maleimide moieties
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'The Devil to Pay' and its influence on eighteenth-century German Singspiel
The premiere of Christian Felix Weisse's Singspiel Der Teufel ist los, oder die verwandelten Weiber was presented at the theatre in Quandts Hof, Leipzig, on the 5th May 1766. There it won immediate success which soon spread throughout the German speaking world. The . ensuing craze for similar entertainments played an important part in the development of the genre.
This was not an original piece, however, and its success was dependent upon the skill with which Weisse had contrived to combine two quite different styles. This he achieved by means of Charles Coffey's The Devil to Pay, or the Wives metamorphosed, an English ballad-opera, and Michel Jean Sedaine's Le diable a quatre, written in the form of a French opera comique.
The purpose of this study is to examine Coffey's ballad-opera together with those adaptations that enabled Weisse to develop the Singspiel into a form which stood as a model for many years afterwards
Utilization of Expert Systems in the Work Place: Performing Project Software Cost Estimation on Training Systems
This research report investigates the use of an expert system to aid project engineers at the Naval Training Systems Center in making decisions concerning the requirements of the computer systems used in simulators. For a prototype system domain, the author chose an expert system that would generate a software development cost estimate. This system questions the user about the features and options required on the training system. The expert system then analyzes the information to generate a “lines of code” estimate. A selected model will combine various factors to generate s value answer for the user. The capabilities and features of current expert system development tools are reviewed as to what features would best address this problem domain. EXSYS, a rule-based expert system shell that runs on both Zenith and IBM PCs, was selected to develop the prototype because of its capability to meet the requirements of the software cost estimation domain. The COCOMO estimation model was selected to generate the user answers. The technique of using a rule-based system in combination with other management decision tools, such as spreadsheets, holds a potential of being an excellent approach for providing a tool for storing and utilizing estimation data and heuristics
Dinah
1. Dinah! the golden summertime is comin\u27, honey, DInah! the busy bumble bees are hummin\u27, honey; Please pack your duds and come back, Don\u27t wait and if the train\u27s late Jump out and run ahead, hon\u27, Beat that old train to me! REFRAIN: Dinah! come on back to Carolina I\u27m kind a lonely, For you my heart is pinin\u27 While the silv\u27ry moon is shinin\u27. Dinah! never saw the weather finer In Carolina, Come back to Carolina, Dinah Lee! 2. Dinah! the honeymoon in June will soon be shinin\u27, Dinah! the honeysuckle down the lane is twining; I\u27ve got a wedding ring, dear, I\u27ve got the preacher right here; I\u27ve got a cottage too, dear, Fixed up for me and you
I Never Knew What Eyes Could Do : Till Yours Looked Into Mine
https://digitalcommons.library.umaine.edu/mmb-vp/1455/thumbnail.jp
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