Browsing by Subject "Electronic & Electrical Engineering"
Now showing items 21-40 of 160
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Content Controlled Image Representation for Sports Streaming
(Suvisoft, 2005)Content based analysis has traditionally been posed in the context of identifying some material in response to a user query. This paper illustrates that given a content based analysis process that can identify semantic ... -
Contribution of particle inertial effects to resonance in ferrofluids
(American Physical Society, 1995)The effect of the moment of inertia of single domain ferromagnetic particles on the frequency-dependent complex susceptibility ?(?)=??(?)-i???(?) of ferrofluids is reported. It is demonstrated that particle inertial effects ... -
Cyclostationary signatures for rendezvous in OFDM-based dynamic spectrum access networks
(IEEE, 2007)Abstract?Distributed coordination of operating frequencies and bandwidths is one of the key challenges in the development of dynamic spectrum access (DSA) technology. The spectrum efficiency of DSA networks is achieved ... -
Demonstration and analyses of collaboration, co-existence, and interoperability of cognitive radio platforms
(IEEE, 2007)The Centre for Telecommunications Value-Chain Research (CTVR) and the Center for Wireless Telecommunications (CWT) are undertaking a joint collaborative research project investigating the potential of different ... -
Detection of Illegal Dumping from CCTV at Recycling Centres
(2007)This paper describes initial work on a framework for automatic detection of illegal dumping from CCTV footage from recycle centres. Frames are seperated into foreground and background regions using a Bayesian approach that ... -
Dielectric relaxation and crystallization of nanophase separated 1-propanol-isoamylbromide mixture
(2007)The effects of liquid-liquid phase separation on molecular relaxation of an apparently homogeneous mixture of 1-propanol and isoamylbromide has been studied by dielectric spectroscopy over a broad frequency and temperature ... -
Discontinuous change in the smectic layer thickness in ferrielectric liquid crystals
(2007)The temperature dependence of the thickness of thick free-standing films is studied using a high-resolution film thickness measurement technique. A small discontinuity in the temperature dependence of the smectic layer ... -
Discrete flexoelectric polarizations and biaxial subphases with periodicities other than 3- and 4-layers in chiral smectic liquid crystals frustrated between ferroelectricity and antiferroelectricity
(2005)The subphase for the temperature range that lies in between Sm-CA* and the three-layer Sm-CA*(1 3) subphase has been confirmed to exist using the measurements of electric-field-induced birefringence, optical rotation, and ... -
Discriminitive Multi-Resolution Sub-Band and Segmental Phonetic Model Combination
(2000)A joint discriminative framework for multi-resolution sub-band HMMs and a hybrid segmental phonetic model is presented which combines independent likelihood scores using class dependent weightings trained to a minimum ... -
Dynamic Block-Edge Masks (BEMs) for Dynamic Spectrum Emission Masks (SEMs)
(2010)This paper explores the evolving role of transmitter spectrum masks in the emerging paradigm of service and technology neutral spectrum planning. We advocate the use of more dynamic approaches to spectrum mask generation ... -
Dynamic Features for Segmental Speech Recognition
(IEEE, 1996)Speech models and features that emphasise the dynamic aspects of speech can provide improved speech recognition. The cepstral time matrix has been established as a successful method of encoding dynamics. The paper extends ... -
Dynamic mechanism of the ferroelectric to antiferroelectric phase transition in chiral smectic liquid crystals
(2008)We report on the observation of V-shaped switching in a ferroelectric liquid crystal cell over a wide range of temperatures. Results of the optical transmittance in the visible region give us the helical pitch for various ... -
Dynamic spectrum access and coexistence experiences involving two independently developed cognitive radio testbeds
(IEEE, 2007)The Centre for Telecommunications Value-Chain Research (CTVR) and the Center for Wireless Telecommunications (CWT) are carrying out joint research work investigating the potential of different software-defined radio ... -
Dynamic susceptibilities of an assembly of dipolar particles in an elastic environment
(American Physical Society, 2001)Theoretical model to describe magnetodynamics of a ferrogel, i.e., an assembly of ferromagnetic nanoparticles embedded in a gel, is proposed. The reorientations of the particles are determined by the influence of the elastic ... -
Effect of a uniform bias force on the Brownian movement in double-well potentials
(American Physical Society, 1997)A general property of the Brownian motion in a bistable potential with the asymmetry arising from the imposition of a bias force is described. The property is that, at values of the bias force far less than the critical value ... -
Effect of an oblique magnetic field on the superparamagnetic relaxation time. II. Influence of the gyromagnetic term
(1998)The effect of a uniform magnetic field applied at an oblique angle to the easy axis of magnetization on the superparamagnetic (longitudinal or Neel) relaxation time is investigated by numerically solving the Fokker-Planck ... -
Effect of cell surfaces on the stability of chiral smectic- C phases
(2008)The effect of surfaces on the stability of smectic-C* (SmC*) variant phases is investigated. The results obtained using dielectric spectroscopy by varying the cell thickness show that the temperature ranges of SmC<sub>al ... -
The effect of confinement on the stability of field induced states and on supercooling in antiferro-ferroelectric phase transitions in chiral smectic liquid crystals
(2009)We investigate both the supercooling and the hysteresis phenomena of the phase transitions between the smectic C* and the smectic C *Aphases driven by temperature and electric field, respectively. These two phenomena show ... -
Effect of ZnS Shell Thickness on the Phonon Spectra in CdSe Quantum Dots
(The American Physical Society, 2003)The evolution of the optical phonon spectra of colloidal core/shell CdSe/ZnS quantum dots with an increase of the shell thickness from 0.5 to 3.4 monolayers has been studied by resonant Raman spectroscopy. The results ... -
Electric field induced biaxiality and the electro-optic effect in a bent-core nematic liquid crystal
(2010)We report the observation of a biaxial nematic phase in a bent-core molecular system using polarizing microscopy, electro-optics, and dielectric spectroscopy, where we find that the biaxiality exists on a microscopic scale. ...