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http://hdl.handle.net/2289/3862
2024-03-19T22:36:21ZBiological cell monolayer shearing apparatus for diagnostic purposes
http://hdl.handle.net/2289/7693
Title: Biological cell monolayer shearing apparatus for diagnostic purposes
Authors: Pullarkat, Pramod; Ott, Albrecht; Aksel, Nuri; Traenkle, Benjamin; Fernandez, N.; Heymann, B
Abstract: The present invention is directed to a method for determining the mechanical properties of biological cells wherein a cell sample containing microbeads having a diameter about the average diameter of the cell's nucleus is introduced into a gap formed by two essentially parallel and horizontal plates, a cell and microbead monolayer is formed, shear stress is applied to said monolayer and the mechanical responses of said monolayer is measured. The present invention is further directed to a device for performing the method.
Description: Open Access2009-02-19T00:00:00ZAn optical fiber-based force transducer for microscale samples
http://hdl.handle.net/2289/7692
Title: An optical fiber-based force transducer for microscale samples
Authors: Chirag Deepak, Kalelkar; Pullarkat, Pramod A.; Rao, Seshagiri; Lele, Ashish Kishore
Abstract: The present invention relates to an etched optical fiber as force transducer with feedback control, with a force range of 1-108 pN and a displacement range of 10-105 nm with a spatial resolution of the order of tens of nanometers are accessible with the instrument. The sample deformation (evolution) can be imaged simultaneously with rheological measurements. The device is used to perform extension rheology of polymer melts, silk, or other bio-fluids at microscales, measure mechanical responses of living cells such as neurons, muscle cells, etc. It is also used as a passive probe for microscale force measurements and to investigate properties of active suspensions such as bacterial baths.
Description: Open Access2014-07-17T00:00:00ZAn improved liquid crystal display device
http://hdl.handle.net/2289/7062
Title: An improved liquid crystal display device
Authors: Chandrasekhar, S.; Prasad, S.K.; Nair, Geetha G.; Rao, D.S.S.; Kumar, Sandeep; Manickam, M.
Abstract: The present invention relates to an improved Liquid Crystal Display Device comprising, a pair of transparent substrates, each substrate having on one of its surfaces a coating of a transparent electrically conducting material which serves as an electrode. A nematic discotic material is sandwiched between the coated surfaces of the said substrates thereby forming a cell. The cell may be placed between a pair of cross polarizers.
Description: Open Access2000-04-05T00:00:00ZDriving method of liquid crystal display element and driving circuit
http://hdl.handle.net/2289/6203
Title: Driving method of liquid crystal display element and driving circuit
Authors: Kuwata, Takeshi; Ruckmongathan, T.N.; Nagano, Hideyuki; Yamashita, Takashi; Hasebe, Hiroshi; Ko, Hidemasa; Kakagawa, Yutaka; Onishi, Takanori
Abstract: PROBLEM TO BE SOLVED: To drive liquid crystal display elements, that utilize high speed responding liquid crystals, with high speed switching. ;SOLUTION: L row electrodes are batch selected in plurality. The selection voltage is set to a voltage level of either +V<SB>r</SB>or -V<SB>r</SB>. Column vector elements of a K-th orthogonal matrix (where K is a power of two and is equal to or greater than L) having +V<SB>r</SB>and -V<SB>r</SB>as elements are made corresponding to the selection voltages to be applied to respective row electrodes. On the other hand, a voltage having a level corresponding to the total sum of exclusive OR of corresponding elements of a data vector and a selection voltage vector is applied to column electrodes.
Description: Open Access2003-06-06T00:00:00Z