Differential Difference Current Conveyor (DDCC) Based Schmitt Trigger Circuit & Its Application

A new voltage mode Schmitt trigger and its application using Differential Difference Current Conveyor (DDCC) is presented in this paper. The proposed circuit has a single DDCC block & two passive components. This circuit does not have any matching conditions. Here two passive components are used and one of them is grounded .The proposed circuit is simulated on SPICE platfor

The teaching of electronics in schools and further education: a case study in curriculum change.

This case study describes the development of Electronics within the curriculum in line with how both (Reid and Walker I975, Case Studies in Curriculum Change) and (Goodson I983, School Subjects and Curriculum Change) discussed changes in terms of theories of curriculum change. Alternative definitions of the term innovation are reviewed and for the purpose of this study a definition is adopted which includes syllabus change and major changes of scale and strategy. The study gives an outline of the major theories of innovation and implementation strategy. Features of centralisation and rationalisation are described insofar as these features led to current educational initiatives. An account Is given of how Electronics developed as a topic within ‘A’ level Physics, a subject within B.E.T.E.C. (previously O.N.C/T.E.C.) and as a separate G.C.E. subject. Data on examination entries In G.C.E. and C.S.E. Electronics are presented. These data are related to the- size of L.E.A.s, the type of centre, and also to explore the viability of G.C.E./G.C.S.E. provision in Electronics. Initiatives such as M.E.P., T.V.E.I., C.P.V.E., S.S.C.R. are described as they are expected to have a significant impact on the growth of Electronics. The position of Electronics within the curriculum and its educational value are discussed. Comment is made on the Systems and Components approaches to Electronics and on the importance of project work. Teacher difficulties with project work are noted and suggestions are made on the use and range of equipment available so that a suitable teaching style may be -developed

NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 23)

Entries for 4000 patent and patent applications citations for the period May 1969 through June 1983 are listed. Subject, invention, source, number, and accession number indexes are included

NASA patent abstracts bibliography: A continuing bibliography. Section 1: Abstracts (supplement 22)

Entries for over 4000 patents and patent applications citations for the period May 1969 through December 1982 are listed. Subject, invention, source, number, and accession number indexes are included

SUSTAINABLE ENERGY HARVESTING TECHNOLOGIES – PAST, PRESENT AND FUTURE

Chapter 8: Energy Harvesting Technologies: Thick-Film Piezoelectric Microgenerato

NASA Patent Abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 20)

Entries for approximately 4000 citations for the period May 1969 through December 1981 are listed. Subject, invention, source, number, and accession number indexes are included

NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 29)

Entries for over 4400 patents and patent applications citations for the period May 1969 through June 1986 are listed. Subject, invention, source, number, and accession number indexes are included

NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 31)

A subject index is provided for over 4600 patents and patent applications for the period May 1969 through June 1987. Additional indexes list personal authors, corporate authors, contract numbers, NASA case numbers, U.S. patent class numbers, and NASA accession numbers

NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 28)

A subject index is provided for over 4800 patents and patent applications for the period May 1969 through December 1985. Additional indexes list personal authors, corporate authors, contract numbers, NASA case numbers, U.S. patent class numbers, U.S. Patent numbers, and NASA accession numbers

NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 27)

A subject index is provided for over 4300 patents and patent applications for the period May 1969 through June 1985. Additional indexes lists personal authors, corporate authors, contract numbers, NASA case numbers, U.S. patent class numbers, U.S. Patent numbers, and NASA accession numbers