The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents the final results of a study on supercapacitor lifetime. As long component lifetime is a requirement for many applications, a computer-controlled test rig has been built to validate supercapacitor lifetimes to manufacturer's specifications. The test rig is also utilized to determine the effect of temperature on supercapacitor parameters and investigate application lifetime. Cycle...
The first volume of an annual series entitled Progress in Dielectrics edited by Birks and Schulman1 appeared this year. Although this review is primarily concerned with dielectric theory and properties of materials, attention is also given to new experimental measurement techniques. Molecular Science and Molecular Engineering by von Hippel2 includes general sections on “Dielectrics and Waves” and...
A very comprehensive volume of “what every physicist should know” is now available in the Handbook of Physics edited by Condon and Odishaw (1). The handbook is divided into nine parts, each devoted to a different basic area of physics. In Part 4, Electricity and Magnetism, dielectrics are treated very thoroughly, starting from the basic theory of dielectrics. The basic theory of magnetic materials...
Small variable three-terminal air capacitors are becoming of increasing importance. Bowdler1 has constructed such a capacitor whose capacitance is known to 1% over the range from 0.01 to 10µ µf. This wide range is obtained by retracting the guarded electrode into a hole in the guard electrode. This produces an exponential relation between capacitance and motion of the electrode. It is similar to a...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.