213 research outputs found
Minimally segmenting performance Bangla optical character recognition using Kohonen network
No full textIncludes bibliographical references (page 5).This paper presents a method to use Kohonen
neural network based classifier in Bangla Optical Character Recognition (OCR) system, providing much higher performance than the traditional neural network based ones. It describes how Bangla characters are processed, trained and then recognized
with the use of a Kohonen network. While there have been significant efforts in using the various types of Artificial ,eural ,etworks (A,,) in optical character
recognition, this is the first published account of using a segmentation-free optical character recognition system for Bangla using a Kohonen network. The methodology presented here assumes that the OCR
pre-processor has minimally segmented the input words into easily segmentable chunks, and presenting each of these as images to the classification engine described here. The size and the font face used to
render the characters are also significant in both training and classification. The images are first converted into grayscale and then to binary images; these images are then scaled to a fit a pre-determined
area with a fixed but significant number of pixels. The feature vectors are then extracted from the rectangular pixel map, which in this case is simply a series of 0s and 1s of fixed length. Finally, a Kohonen
neural network is chosen for the training and
classification process. Although the steps are simple, and the simplest network is chosen for the training and recognition process, the resulting classifier is
accurate to better than 98%, depending on the quality of the input images.Adnan Mohammad Shoeb ShatilMumit Kha
Strong interfacial polarization in graphene/ZnO nanocomposite for high-performance miniscule permittivity materials
No full textSTUDY OF GENUS CHEIROCHELA (NAUCORIDAE) FROM DIFFERENT PART OF INDIA
No full textNaucoridae is a small family of aquatic insect of sub order Heteroptera. The member of family Naucoridae are easily distiguished due to broad, oval and flattned body. The study of Indian naucoridae is of a great importance. The genus cheirochela is previously record by two species cheirochela assamensis hope, 1841 and Cheirochela Feena, Montand 1897. A new species of the genus is being discovered for the first time in its current state. The current study is the result of a three-and-a-half-year continuous survey of these bugs in various locations of India. Several field surveys were conducted in Uttar Pradesh, Punjab, Haryana, Delhi, Assam, and Rajasthan to gather a significant number of bugs from ponds, lakes, rivers, streams, and water reservoirs in various parts of India. The genital propagation of the new species was made and examined. The insect of this study were preserved in 90% Alcohal. The study was made under binoculars, stereoscope and compound microscope, camera lucida were used for making the sketches and measurements were taken with the halp of micrometer
J Environ Health
No full textMany toxic metals are involved in the initiation and progression of DNA damage that can result in the activation of DNA damage response machinery at double- and single-stranded DNA; this response can result in global and gene-specific DNA alteration. The toxicological profiles from the Agency for Toxic Substances and Disease Registry (ATSDR) and several other studies have demonstrated the influence of metal exposure-induced genotoxic endpoints and epigenetic modifications. Our review systematically summarizes accumulating evidence from ATSDR toxicological profiles and the available literature that demonstrate a possible induction of various genotoxic endpoints and metal exposures. We include in this article studies on chromium, arsenic, nickel, lead, mercury, and zinc.CC999999/ImCDC/Intramural CDC HHSUnited States
Pharmacol Ther
No full textThe ends of chromosomes shorten at each round of cell division, and this process is thought to be affected by occupational exposures. Occupational hazards may alter telomere length homeostasis resulting in DNA damage, chromosome aberration, mutations, epigenetic alterations and inflammation. Therefore, for the protection of genetic material, nature has provided a unique nucleoprotein structure known as a telomere. Telomeres provide protection by averting an inappropriate activation of the DNA damage response (DDR) at chromosomal ends and preventing recognition of single and double strand DNA (ssDNA and dsDNA) breaks or chromosomal end-to-end fusion. Telomeres and their interacting six shelterin complex proteins in coordination act as inhibitors of DNA damage machinery by blocking DDR activation at chromosomes, thereby preventing the occurrence of genome instability, perturbed cell cycle, cellular senescence and apoptosis. However, inappropriate DNA repair may result in the inadequate distribution of genetic material during cell division, resulting in the eventual development of tumorigenesis and other pathologies. This article reviews the current literature on the association of changes in telomere length and its interacting proteins with different occupational exposures and the potential application of telomere length or changes in the regulatory proteins as potential biomarkers for exposure and health response, including recent findings and future perspectives.CC999999/ImCDC/Intramural CDC HHSUnited States
Host Parasite Interaction of Apicomplexan Parasites (Sporozoa: Haemosporida) in Columba livia
No full textABSTRACT: During thirty nine months of sampling, the prevalence was studies in C. livia of Rohilkhand region of Uttar Pradesh, India, according to the sex of the host, different seasons and localities where the pigeons were obtained. Data on the occurrence of Haemoproteus and Plasmodium showed the maximum percentage of infection (55.63%) in C. livia during the entire period of study. Out of 266 pigeons sampled, 148 pigeons were positive for Haemoproteus at a prevalence of 55.63%. Only 18 pigeons (2.67%) had a mixed infection with  Haemoproteus and Plasmodium and 130 pigeons (48.87%) had Haemoproteus infection alone and no pigeons were positive for Plasmodium alone. Parasite incidence in relation to the sex of the host indicated a higher infestation in females (62.79%) than males (57.65%). The overall highest infectivity of parasites was recorded during the summer season (82.85%) followed by spring season (59.37%) and least in the winter season (42.30%). It was also observed that Haemoproteus occurred at diverse infectivity in C. livia from different localities (Badaun-51.35%, Bareilly- 11.18% and Shajahanpur-58.06%) whereas Plasmodium was recorded 11.18% only from Bareilly. This parasite was completely absent from the other two sites. Key words: Haemoproteus, Plasmodium, pigeons, prevalence, seasons, sex 1Department of Life Science, R.K.S. Degree College, Sahawar Kanshiramnagar 207245 (U.P.) India; 2Department of Zoology, Sir M.U.Degree College, Sahawar Kanshiramnagar 207245 (U.P.) India Please Cite This Article As:Nasim Jahan and Mohammad Shoeb. 2010. Host Parasite Interaction of Apicomplexan Parasites (Sporozoa: Haemosporida) in Columba livia. J. Exp. Sci. 1(5):6-10. Â
Effect of thermal annealing upon residual stress and mechanical properties of nanostructured TiSiN coatings on steel substrates
No full textNanostructured TiSiN coatings were deposited onto a tool steel substrate. The coated samples were then annealed under vacuum at temperatures ranging from 4001 to 9001C. Both mechanical properties and residual stresses in the coatings were determined using nanoindentation methods, assisted by finite element analysis. Intrinsic residual stress was found to be dominant in the as-deposited coatings, but decreased with the increased annealing temperature. In contrast, thermal annealing has little impact on either the Young’s modulus or hardness of the coatings at temperatures up to 8001C. Grazing incidence X-ray diffraction analysis indicated that stress relaxation occurred in nanocrystalline TiN grains during thermal annealing. Direct subsurface observation, enabled by focused ion beam microscopy, revealed that microstructural characteristics, responsible for both the Young’s modulus and hardness of the coatings remained unaffected during thermal annealing. The degradation of mechanical properties for the coatings annealed at 9001C resulted primarily from the formation of a thin, soft titanium oxide layer at the outer surface.Ahmed, Mohammad Shoeb ; Zhao, Xiaoli ; Zhou, Zhi - Feng ; Munroe, Paul ; Chen - Tan, Nigel ; Li, Lawrence Kwok Yan ; Xie, Zongha
QDB, QU & QC launch MA’AN to promote entrepreneurs
No full textQatar Development Bank (QDB), Qatar University (QU) and Qatar Chamber (QC) launched a joint initiative MA’AN to support and promote entrepreneurship, especially students. The initiative aims to achieve objective of economic diversification of the Qatari economy
Cytotoxic compounds from the genus Centaurea
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
Anticancer agents from medicinal plants
No full textCancer is a major public health burden in both developed and developing countries. Plant derived agents are being used for the treatment of cancer. Several anticancer agents including taxol, vinblas-tine, vincristine, the camptothecin derivatives, topotecan and irinotecan, and etoposide derived from epipodophyllotoxin are in clinical use all over the world. A number of promising agents such as flavopiridol, roscovitine, combretastatin A-4, betulinic acid and silvestrol are in clinical or preclinical development
- …
