Browsing Engineering by Issue Date
Now showing items 120 of 1305

Analytical and experimental thermal analysis of multiple heat sources in integrated semiconductor chips
(IEEE, 197205)Because of the complexity and interconnection density of today's integrated circuit chips, experimental measurement of individual transistor or diode junction temperatures under typical powered conditions has become ... 
On Schwarz canonical form for large system simplification
(IEEE, 19750401)Recently a new technique for the reduction of a largeorder dynamical system, using Schwarz canonical form, has been proposed [1]. It is presently shown that the above is essentially a frequency domain technique for which ... 
Identification of nonlinear systems in frequency domain
(IEEE, 19751101)A frequency domain technique for identifying a class of nonlinear systems is presented. The class of nonlinear systems we consider in this paper consists of a power series nonlinearity sandwiched between two linear systems ... 
Experimental results of the remote sensing of seasurface salinity at 21cm wavelength
(IEEE, 19760701)The complex dielectric constant of sea water is a function of salinity at 21cm wavelength, and seawater salinity can be determined by a measurement of radiometric temperature at 21 cm along with a measurement of thermodynamic ... 
Authors' reply
(IEEE, 19760801) 
Custom programming/analysis in the small business environment
(IEEE, 197609)As has often been stated, a business of any size can be considered as a general system,8,11,13,28,29,20,31with identifiable external inputs and outputs typically consisting of goods, services, energy, money, and information. ... 
An experimental validation of mathematical simulation of human thermoregulation
(Elsevier, 1977)An experimental validation of Stolwijk's mathematical model of thermoregulation is presented. Although the model seems to be accepted widely, very little experimental data for validation exists in the open literature. ... 
WER1: Two dimensional tests of GA(W)1 and GA(W)2 airfoils at angles ofattack from 0 to 360 degrees
(Wichita State University.Wind Energy Laboratory, 197701)Tests of the GA(W)  l and GA(W)2 airfoils were conducted in the 2 D test section of the Wichita State University 7' x 10' low speed wind tunnel to determine the lift , drag, and pitching moment coefficients of the ... 
WER2: Wichita, Kansas wind characteristics estimated from 19681973 NWS data : performance of the NASA 100 kw prototype wind generator in the Wichita wind regime
(Wichita State University. Center for Energy Studies, 197702)At the present time there ex ists a capabi lity to manufacture wind turbines for generati ng el ectric power to be fed into the utility grid. These turbines would not be l arge by conventi onal power plant standards; individual ... 
An algorithm for the two dimensional FFT
(IEEE, 19770501)Conventional two dimensional fast Fourier transforms become very slow if the size of the matrix becomes too large to be contained in memory. This is due to the transposition of the matrix that is required. This new algorithm ... 
The zoom FFT using complex modulation
(IEEE, 19770501)A recent paper by Yip discussed the zoom transform as derived from the defining equation of the FFT. This paper simplifies the concepts and removes some of the restrictions assumed by Yip; ie., the total number of points ... 
WER4: Wind characteristics for the western part of Kansas
(Wichita State University. Wind Energy Laboratory, 197802)The Kansas stations show power densities of from 175 to 200 W/m2 at a height of 25 ft. Using the 3/7 power law, a 200 W/m2 power density would increase to 360 W/m2 at a height of 100 ft and to 490 W/mZ at 200 ft. There ... 
On combinational networks with restricted fanout
(IEEE, 197804)Fanoutfree networks of AND, OR, NOT, EXOR, and MAJORITY gates are considered. Boolean functions for which such networks exist are defined to be fanout free. The paper solves the following problems regarding the fanoutfree ... 
Twodimensional zoom FFT
(IEEE, 19780401)The concept of the zoom FFT (a more efficient algorithm which allows zooming in on a narrow segment of the spectrum while preserving its frequency content) is extended to the twodimensional case. The technique is further ... 
WER5: Wind power estimation in the Great Plains
(Wichita State University. Wind Energy Laboratory, 197811)Some aspects of wind power estimation are examined. Confidence intervals for wind power density are calculated from existing National Weather Service wind data for the Great Plains area. Correlation of yearly mean wind ... 
A cellular array for multivalued logic functions
(IEEE, 197811)An algebraic generalization of the wellknown binary qfunction array to a multivalued qfunction array is presented. It is possible to associate treestructure realizations for binary qfunctions and multivalued qfunctions. ... 
An optimal frequency domain filter for edge detection in digital pictures
(IEEE, 19790101)Edge detection and enhancement are widely used in image processing applications. In this paper we consider the problem of optimizing spatial frequency domain filters for detecting edges in digital pictures. The filter is ... 
WER6: Comparison of performance of Darrieus wind turbines having 12% and 21% thick sections
(Wichita State University. Center for Energy Studies, 197905)A series of wind tunnel tests of a onemeter Darrieus wind turbine has been conducted to determine some effects of blade section on turbine performance. The tests confirm Fukuda's prediction that increasing section c'max ... 
WER7: The use of water source heat pumps in south central Kansas
(Wichita State University. Center for Energy Studies, 197908)A water source heat pump (WSHP) operates similarly to a conventional airtoair heat pump except that instead of using the air as a heat source or sink, a water reservoir, such as ground water, is used. The conventional ... 
WER10: Feasibility study of aileron and spoiler control systems for large horizontal axis wind turbines
(Wichita State University. Center for Energy Studies, 197911)Studies have been conducted to determine the feasibility of using aileron or spoi ler controls as alternates to pitch control for large horizontal axis wind turbines. The NASA MDOO machine was used as the basis for this ...