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Search Results: 1 - 10 of 196 matches for " Mousam Halder "
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Performance Analysis of High Speed Low Power Carry Look-Ahead Adder Using Different Logic Styles
Jagannath Samanta,Mousam Halder,Bishnu Prasad De
International Journal of Soft Computing & Engineering , 2013,
Abstract: A carry look-ahead adder improves speed byreducing the amount of time required to resolve carry bits. It iswidely used in any electronic computational devices. In this papera 4 bit & 8 bit CLA has been implemented using different staticand dynamic logic styles such as Standard CMOS, DCVS PseudoNMOS, PTL & Domino logic style. The performance of the CLAhas been measured by comparing the results in terms ofpropagation delay, power dissipation and their Power DelayProduct. The simulation is done with the help of Tanner EDA toolconsidering the different feature sizes of 150nm, 200nm &250nm. Result analyses are also carried out for intrinsic andextrinsic load capacitances. This work will helpful for any circuitdesigner to build any system.
Lethal Developmental Defects: An Overview  [PDF]
Ashutosh Halder
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.416141
Abstract: About 3% of all conceptions are associated with major congenital malformations, many of them are lethal developmental defect and genetic in origin or teratogenic (adverse effects of the environment during gametogenesis or early embryogenesis). Genetics with or without adverse environment has role in virtually every developmental defect/malformation disorders in causation, predisposition, susceptibility & modulation of disease. Advances in genetics, introduction of triple marker screening, routine obstetric ultrasound examination into obstetric practice & accesses to prenatal diagnosis helped in secondary prevention (early detection & termination) of lethal developmental defects. Ultrasound detection of fetal developmental defects/malformation is common now and often decision on pregnancy solely based on ultrasonic morphological description. This practice leads to difficulty in providing accurate counseling as well as preventing disorder in subsequent pregnancy, in particular early. Hence an understanding of reproductive genetics of major developmental disorders is important for today’s perinatal care specialists. This overview will outline the various lethal developmental defects observed in an advanced reproductive genetics set up and various approaches adopted to derive diagnosis. Detailed assessment of fetus after termination of pregnancy (spontaneous/induced) for fetal anomalies was carried out in most cases. As most cases was referred after termination in formalin routine chromosomal analysis was not possible however, in selected cases targeted FISH analysis with specific chromosomal probe was carried out to confirm clinical diagnosis. Detailed evaluation of fetus is important as this practice often helped in modification of genetic counseling, as well as course of management in the next pregnancy. No molecular diagnostic or screening work was carried out due to non availability of information and facility in past. However, this is important today as many of the lethal developmental defects are yet to be categorized etiopathologically, and hence immediate need is to start clinical registry along with biorepository of developmental defects cases for future research work on informative families, in particular with multiple affected fetuses/sibs, using
Preparation and Characterization of Electrically and Thermally Conductive Polymeric Nanocomposites  [PDF]
Mousam Choudhury, Smita Mohanty, Sanjay K Nayak, Rakesh Aphale
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2012, DOI: 10.4236/jmmce.2012.117062
Abstract: The dielectric properties of composites and nanocomposites composed of epoxy resin as base matrix and AlN (Aluminum Nitride) as micro and nanofiller has been studied at variable loading of AlN. To improve the dispersion of the filler within the polymer matrix, AlN was surface modified with silane coupling agent (SCA). The thermal conductivity behavior of epoxy/AlN composites and nanocomposites has been studied at variable percentage of filler and temperatures. Test result indicated an increase of thermal conductivity of the composites at 20 wt% of AlN. Also, silane treated composites exhibited improved electrical conductivity properties wherein the electrical insulation property decreased in terms of di-electric strength and resistivity.
Verruca plana following eyebrow threading
Halder Saswati,Halder Atin
Indian Journal of Dermatology, Venereology and Leprology , 2009,
Abstract:
Amniotic band syndrome and/or limb body wall complex: split or lump
Ashutosh Halder
The Application of Clinical Genetics , 2010, DOI: http://dx.doi.org/10.2147/TACG.S8894
Abstract: mniotic band syndrome and/or limb body wall complex: split or lump Other (9492) Total Article Views Authors: Ashutosh Halder Published Date February 2010 Volume 2010:3 Pages 7 - 15 DOI: http://dx.doi.org/10.2147/TACG.S8894 Ashutosh Halder Department of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, India Abstract: Six cases of amniotic band syndrome/limb body wall complex were studied in respect to clinicopathologic characteristics. The diagnosis was based on two out of three of the following manifestations: cranio facial clefts; limb body wall defects and amniotic band attachment. Four cases were stillborn and associated with internal defects, including central nervous system. Two cases had facial and limb defects and were live born (3–5 years old at examination). Phenotypic features of the stillborn cases were craniofacial clefting, thoracoabdominoschisis, amputation, ring constriction, amniotic band adhesion, placental adhesions, and internal malformations. Histology of bands revealed fibroconnective tissue as well as flattened epithelial cells together with neuroectodermal elements. Umbilical cord section revealed an abnormal number of vessels. When analyzing the observed data in relation to their etiology, it was found that amniotic disruption, vascular disruption or genetic disruption could explain the amniotic band syndrome/limb body wall complexes, alone or in combinations. A brief review of literature in search of pathogenesis is offered along with an etiopathogenetic model.
Amniotic band syndrome and/or limb body wall complex: split or lump
Ashutosh Halder
The Application of Clinical Genetics , 2010,
Abstract: Ashutosh HalderDepartment of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, IndiaAbstract: Six cases of amniotic band syndrome/limb body wall complex were studied in respect to clinicopathologic characteristics. The diagnosis was based on two out of three of the following manifestations: cranio facial clefts; limb body wall defects and amniotic band attachment. Four cases were stillborn and associated with internal defects, including central nervous system. Two cases had facial and limb defects and were live born (3–5 years old at examination). Phenotypic features of the stillborn cases were craniofacial clefting, thoracoabdominoschisis, amputation, ring constriction, amniotic band adhesion, placental adhesions, and internal malformations. Histology of bands revealed fibroconnective tissue as well as flattened epithelial cells together with neuroectodermal elements. Umbilical cord section revealed an abnormal number of vessels. When analyzing the observed data in relation to their etiology, it was found that amniotic disruption, vascular disruption or genetic disruption could explain the amniotic band syndrome/limb body wall complexes, alone or in combinations. A brief review of literature in search of pathogenesis is offered along with an etiopathogenetic model.Keywords: amniotic band syndrome, limb body wall complex and pathogenesis
Die Generation 60+ in 8 Rheumaambulanzen in sterreich
Halder W
Journal für Mineralstoffwechsel , 2008,
Abstract: Epidemiologische Untersuchungen zeigen, dass degenerative, aber auch entzündliche rheumatische Erkrankungen mit zunehmendem Lebensalter geh uft auftreten. Ziel der vorliegenden Untersuchung ist es, den Anteil von Patienten von 60 Jahren oder lter in 8 sterreichischen Rheumaambulanzen zu erfassen. Die erhobenen Ergebnisse werden diskutiert.
Alternative method of generation of Cerenkov radiation or shock wave
Amit Halder
Physics , 1997,
Abstract: An alternative method of generation of Cerenkev radiation is proposed over here with the help of a rotating source and a reflector. The principle is that, if we focus a narrow beam of light on to source of light is rotated with certain angular velocity then the light spot on the surface will move with very high velocity which may exceed the velocity of light. As a consequence of this we shall observe an effect very similar to Cerknov radiation.
Rotational Doppler Effect
Amit Halder
Physics , 2002,
Abstract: A monochromatic linear source of light is rotated with certain angular frequency and when such light is analysed after reflection then a change of frequency or wavelength may be observed depending on the location of the observer. This change of frequency or wavelength is different from the classical Doppler effect [1] or relativistic Doppler effect [2]. The reason behind this shift in wavelength is that a certain time interval observed by an observer in the rotating frame is different from that of a stationary observer.
Study of the microphysical properties associated with the Monsoon Intraseasonal Oscillation as seen from the TRMM observations
M. Halder, P. Mukhopadhyay,S. Halder
Annales Geophysicae (ANGEO) , 2012,
Abstract: The spatio-temporal variability of Indian Summer Monsoon is well studied based on different types of rainfall data. However, very few attempts have been made to study the underlying role of clouds and its hydrometeors on Monsoon Intraseasonal Oscillations. The northward propagating Monsoon Intraseasonal Oscillations and its characteristics remain a challenge for the numerical modelers even today. In view of this, we have set out to analyze the role of cloud hydrometeors and their linkage with northward propagating Monsoon Intraseasonal Oscillations. The science question that we intend to address here is whether the different phases of the cloud hydrometeors show similar propagation characteristics as that of rainfall, and what are the relations of their phases with the convection centre using Tropical Rainfall Measuring Mission data. In answering the question, we have analyzed ten years of Tropical Rainfall Measuring Mission 2A12 hydrometeor data over Indian region. Our analyses show that the cloud water and cloud ice do show a large scale organization during the Indian Summer Monsoon regime of June–September, and systematically progress northward getting initiated over equatorial Indian Ocean. On further analyses, we found that cloud water actually leads the rainfall and cloud ice lags the rainfall. We have further demonstrated the process by analyzing dynamical parameters from Modern Era-Retrospective Analysis for Research and Applications. The presence of cloud water in the lower troposphere in the leading edge of rainfall indicates the lower level moistening and preconditioning of the convective instability due to enhanced moisture convergence. Subsequently, deep convection is triggered, which generates hydrometeor above freezing level and cloud ice in the upper troposphere. To quantify objectively the relation among cloud liquid water, cloud ice and rainfall, the lag correlation is computed with respect to convection center, where the above hypothesis is established that cloud liquid water leads the rainfall and cloud ice lag. This relation among hydrometeors may help the numerical modelers to incorporate such processes for capturing the characteristics of Monsoon Intraseasonal Oscillations.
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