Electronic & Electrical Eng (Scholarly Publications): Recent submissions
Now showing items 581-600 of 610
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Interlayer interactions and the dependence of biaxiality of the chiral smectic- C* phase on electric field in the helical unwinding process
(2007)We investigate the unwinding process of pure and racemized mixtures of 1-methylheptyloxycarbonyl phenyl-4 -carboctyloxy-biphenyl-4-carboxylate MHPOOCBC in homeotropic cells by studying i the optical texture under ... -
Conformational distribution of a ferroelectric liquid crystal revealed using fingerprint vibrational spectroscopy and the density functional theory
(2007)The authors have investigated the conformational structure of the ferroelectric liquid crystal compound 4-3-methyl-2-chloropentanoyloxy- 4? -hexyloxy-biphenyl also known under the abbreviations 3M2CPHOB and C6 using ... -
Temperature-induced sign reversal of biaxiality observed by conoscopy in some ferroelectric Sm- C* liquid crystals
(2007)We have studied various ferroelectric liquid crystals to find the average molecular direction of the shortest axis in the perfectly unwound state by using tilted conoscopic measurements. We find that there exist two types ... -
Molecular orientational properties of a high-tilt chiral smectic liquid crystal determined from its infrared dichroism
(2007)The orientational characterisitics and the temperature dependencies of the molecular apparent tilt angle of a partly fluorinated chiral smectic liquid crystal (/S/)-4-(1-methylheptyloxycarbonyl)phenyl 4-[6-(3,4,4,4-tetra ... -
Electro-optic and dielectric study of the de Vries-type smectic- A phase exhibiting transitions to smectic- CA and smectic- C phases
(2008)Mixtures of different compositions of an antiferroelectric liquid crystal compound that exhibits direct smectic-A Sm-A -smectic-CA Sm-CA transition with a ferroelectric liquid crystal compound that exhibits Sm-A -smectic-C ... -
Solitary wave propagation in antiferroelectric liquid crystal cells and the quadrupolar term in the interlayer interaction
(American Physics Society, 2007)Planar antiferroelectric liquid crystal (AFLC) cells exhibit propagating solitary waves. By measuring the retardation and the apparent tilt angle, we find that the conventional model for the solitary wave propagation in ... -
Automated processing of shoeprint images based on the Fourier transform for use in forensic science
(IEEE, 2005)The development of a system for automatically sorting a database of shoeprint images based on the outsole pattern in response to a reference shoeprint image is presented. The database images are sorted so that those from ... -
Adaptive noncontact gesture-based system for augmentative communication
(IEEE, 1999)An adaptive noncontact gesture-based system for augmentative communication is described. The system detects movement of any anatomical site through the analysis of reflected speckle. This movement is converted into ... -
A model for human skin impedance during surface functional neuromuscular stimulation
(IEEE, 1999)A new mathematical model for the bulk electrical impedance of human skin is presented. In particular this model describes the impedance of skin during surface functional neuromuscular stimulation (FNS) with square stimulation ... -
Automatic classification of heartbeats using ECG morphology and heartbeat interval features
(IEEE, 2004)A method for the automatic processing of the electrocardiogram (ECG) for the classification of heartbeats is presented. The method allocates manually detected heartbeats to one of the five beat classes recommended by ... -
A parametric feature extraction and classification strategy for brain-computer interfacing
(IEEE, 2005)Parametric modeling strategies are explored in conjunction with linear discriminant analysis for use in an electroencephalogram (EEG)-based brain-computer interface (BCI). A left/right self-paced typing exercise is analyzed ... -
Telephony-based voice pathology assessment using automated speech analysis
(IEEE, 2006)A system for remotely detecting vocal fold pathologies using telephone-quality speech is presented. The system uses a linear classifier, processing measurements of pitch perturbation, amplitude perturbation and harmonic-to-noise ... -
A patient adapting heartbeat classifier using ECG morphology and heart-beat interval features
(IEEE, 2006)An adaptive system for the automatic processing of the electrocardiogram (ECG) for the classification of heartbeats into one of the five beat classes recommended by ANSI/AAMI EC57:1998 standard is presented. The heartbeat ... -
Robust biometric person identification using automatic classifier fusion of speech, mouth, and face experts
(IEEE, 2007)Information about person identity is multimodal. Yet, most person-recognition systems limit themselves to only a single modality, such as facial appearance. With a view to exploiting the complementary nature of different ... -
Electrocardiogram based neonatal seizure detection
(IEEE, 2007)A method for the detection of seizures in the newborn using the electrocardiogram (ECG) signal is presented. Using a database of eight recordings, a method was developed for automatically annotating each 1-min epoch as ... -
Using broad phonetic group experts for improved speech recognition
(IEEE, 2007)In phoneme recognition experiments, it was found that approximately 75% of misclassified frames were assigned labels within the same broad phonetic group (BPG). While the phoneme can be described as the smallest ... -
Tip-enhanced secondary emission of a semiconductor quantum dot
(American Institute of Physics, 2008)The interaction between interface plasmons within a doped substrate and quantum dot electrons or holes has been theoretically studied in double heterostructures based on covalent semiconductors. The interface plasmon modes, ... -
Tunable photonic structures based on silicon and liquid crystals
(2008)This paper is focused on the design, fabrication and characterization of the conventional and tunable photonic devices based on grooved silicon, serving as one-dimensional (1D) photonic crystal. The advantages of these ... -
Whispering gallery mode emission from photonic microtubes
(IEEE, 2006)We have found cylindrical glass microtubes can be formed by vacuum assisted filtration using a micro-channel glass matrix followed by thermal treatment of the material. The microtubes are strongly luminescent and exhibit ... -
Automated Segmentation of Torn Frames using the Graph Cuts Technique
(2007)Film Tear is a form of degradation in archived film and is the physical ripping of the film material. Tear causes displacement of a region of the degraded frame and the loss of image data along the boundary of tear. In ...
