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Search Results: 1 - 10 of 6987 matches for " Mr. Avisankar Roy "
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Compact and Broadband Monopole Triangular Microstrip Patch Antenna with Shorting Pin
Mr. Avisankar Roy,Dr. P. P. Sarkar,Dr. Sunandan Bhunia
International Journal of Soft Computing & Engineering , 2013,
Abstract: A monopole triangular shaped, broadband, compact microstrip patch antenna with shorting pin is presented in this paper. By defecting the ground plane bandwidth of 38.7% with respect to center frequency of a Microstrip patch antenna has been achieved which can be used for WLAN application. 82.4% size reduction has also been achieved by using shorting pin of a microstrip patch antenna with inset feed. The simulation is done by using the Method of Moment based commercially available standard software.
Compact Broad Band Dual Frequency Slot Loaded Microstrip Patch Antenna with Defecting Ground Plane for Wi-MAX and WLAN
Avisankar Roy,Sunandan Bhunia
International Journal of Soft Computing & Engineering , 2012,
Abstract: A dual frequency, compact microstrip patch antenna with enhanced bandwidth is presented in this paper. Microstrip antenna with bandwidth of 31% is also been designed for Wi-MAX application by defecting the ground plane The single layered antenna has been designed to resonate in dual frequencies for Wi-MAX and WLAN with enhanced bandwidth of more than 12%. Microstrip patch antenna with inset feed is simulated with the method of Moment based standard software.
Effects of Array Parameters on FSS Structure of Dipole Array
Raj Kumar Maity,Avisankar Roy,Surajit Mukherjee,Dr. Tarun Kumar Barik
International Journal of Soft Computing & Engineering , 2013,
Abstract: This paper focuses on the study of the effects of thearray parameters such as array spacing, length and width of thearray element on the characteristics such as transmissioncoefficient, bandwidth of a Frequency Selective Surface (FSS)structure formed by uniform dipole array used in microwavefrequency for communication. In this paper FSS structure of20X20 half-wave dipole elements has been studied.Electromagnetic wave equations are solved by Method of Moment(MoM) and mathematical formulation has been programmedusing MATLAB.
Survey of WiMAX Networks
Mr. Ajay Roy,Dr. A K Jain
International Journal of Research in Management, Science & Technology , 2013,
Abstract: IEEE 802.16(Broadband Wireless MAN) is fastgrowing wireless broadband networks of the world. WiMAX isone of the key technology cof IEEE 802.16 standard .In thispaper we provide an overview of WiMAX.
Fluoroquinolones : An Overview
Mr.Sandesh R Lodha,Dr. Akhiles Roy,Dr Shailesh Shah,Dr. Dinesh Shah
Pharmaceutical Reviews , 2008,
Abstract: A vast array of fluoroquinolones having excellent broad-spectrum activity forms an invaluable part of the present anti-infective armoury of the clinicians. A number of these compounds are today's blockbusters of the antibacterial market due to their therapeutic efficacy having tolerable side-effects and thus, challenging the predominance of well- established β-lactam antibiotics which are becoming more prone to the resistant pathogenic bacteria. The fluoroquinolones are the fastest growing antibacterial class in terms of global revenue, increasingly being used in both the hospital and community sectors to treat a broad range of infections1. Report Highlights: Of the 20 antibacterials lately introduced into the clinic seven are fluoroquinolones and of which four are expected to dominate the market by 2010.However, the US patent expiry of Bayer's blockbuster Cipro, is set to change the dynamics of this sector while novel compounds are increasingly favoured in the light of drug resistance. The fluoroquinolone market is heavily dominated by ciprofloxacin and levofloxacin, which together command 65% ($3.3 billion) of global sales2. The broad spectrum of pathogen activity exhibited by these compounds, alongside their wide range of available formulations, creates significant challenges for companies looking to introduce novel products.
Probabilistic Prediction for Earthquake in Bangladesh: Just How Big Does the Earthquake Have to Be Next Years?  [PDF]
Shongkour Roy
Open Journal of Earthquake Research (OJER) , 2014, DOI: 10.4236/ojer.2014.32011
Abstract: Earthquakes are more deadly than any other form of natural hazard. Because of this, scientists have been searching for accurate ways to predict earthquakes so that lives can be saved. Statistical analysis is useful methods of predicting earthquakes. They provide additional insights to the seismic hazard. In this work, the statistical analysis has been described through the study of “Region of Bangladesh”. A sample result from the statistical analysis which gives intermediate term prediction of earthquakes is given. At the end of the study, the prediction of near future earth-quakes is also investigated through the pictorial and tabular behaviors.
The “Glocal” Dynamics of Construction Labor and Digital Architecture: Preston Scott Cohen’s Addition to the Tel Aviv Museum as Case Study  [PDF]
Roy Kozlovsky
Journal of Building Construction and Planning Research (JBCPR) , 2015, DOI: 10.4236/jbcpr.2015.32009
Abstract: Globalization and technological change are transforming the ways in which buildings are being designed and built. An overlooked aspect of this development is its impact on construction labor, and the significance of labor for assessing the work of architecture. The paper draws upon the sociological concept of the “glocal” to analyse the construction site as the product of the tension between global and local conditions of architectural production and consumption. The construction of Preston Scott Cohen’s 2010 Tel Aviv Museum Addition serves as its case study for theorizing the “glocal” dynamics of digital architecture, building technology and construction labor. This methodological approach highlights the role of migrant guest workers and technological transfer in contemporary construction culture. To realize with precision the complex design under local constraints, the contractor developed a hybrid work process that interspersed labor saving automated manufacturing techniques with artisanal, skilled construction work. In addition, workers and contractors exercised a high level of control over the pace and method of construction, and devised building solutions which improved upon the architect’s design. In conclusion, the paper argues that construction activity differs from broader trends in manufacturing due to the self-reflexivity of architectural design to its condition of production, but that at the same time, this critical capacity is enabled by the globalization of construction labor.
Ocular Injuries Occurring in Motor Vehicular Accident Victims, Yazd Province.
MR Besharati,MR Shoja
Journal of Shahid Sadoughi University of Medical Sciences , 2006,
Abstract: Introduction: Motor vehicular accidents are one of the leading causes of death in young men and severe complications in all age groups. This study was carried out to evaluate eye injuries secondary to motor vehicular accidents that have a high rate of occurrence in Yazd province. Methods: This descriptive, cross- sectional study was conducted through case series method. Simple sampling, i.e. census from the under study population was performed to complete the sample number. The study was carried out in 1383 on 126 motorcycle accident cases with eye injuries referred to the Kalantari Emergency Department. Data collected from questionnaires was analyzed by SPSS software using chi-square, Fisher and Variance analysis statistical tests. Results: Of the 126 cases, 124 (98.4%) were male and 2 (1.6%) were female. The mean age of the patients was 27.4 (SD=13.7) ranging between 5 months and 81 years. The highest rate of accidents was between cars and motor cycles; 83 cases (65.9%) and most of them (76.2%) were in the city. The most frequent eye injury was sub conjunctival hemorrhage in 112 cases (44.4%) followed by eyelids injury [Right side 64 cases (50.8%) and left side in 55 cases (43.6%)], orbital injury in 57 cases (22.6%) of which 39 cases (68.4%) had periorbital hematoma and 18 cases (31.6%) had an orbital fracture, 20 cases (7.9%) had ocular movement limitation and lacrimal drainage system injury was seen in 13 cases (5.2%). Those with helmets had more mandibular fractures (p=0.0001). Conclusion: The victims of motor vehicular accidents in our study were young men. The most frequent eye injuries were sub conjunctival hemorrhage, eyelid, orbital and lacrimal system injuries.
Comparison of efficacy and safety of topical Ketotifen (Zaditen) with Cromolyn sodium in the treatment of Vernal keratoconjunctivitis
MR Shoja,MR Besharaty
Journal of Research in Medical Sciences , 2005,
Abstract: Background: This study compared the efficacy of Ketotifen fumarate .025% (Zaditen) with Cromolyn sodium 4% (Opticrom) eye drops in prevention of itching, tearing, and redness in Vernal Keratoconjunctivitis (VKC). Methods: This double blind randomized single center clinical trial conducted between April and August 2004 in Yazd. One hundred eligible patients with clinical diagnosis of moderate VKC were randomly prescribed Zaditen (group A: n=50) and Cromolyn sodium (group B: n=50) eye drops for a 4 weeks period. Itching, lacrimation, redness, and photophobia were scored on a 4-points severity scale. Results: After 7 days of treatment, the response rates based on subjects assessment of global efficacy was significantly greater in Ketotifen group (61.5%) than in Cromolyn group(53%).A clear response to treatment occurred in 94.4 of Zaditen and 81.2% of Sodium Cromoglycate treated patients. The investigator,s assessment of response rates also showed that Ketotifen was superior to Cromolyn sodium (P=0.001). Ketotifen produced a significantly better outcome than Cromolyn for relief of signs and symptoms of VKC (P<0.05). Ketotifen fumarate treatment significantly reduced the total signs and symptoms score for each patients, in compare with day 0. Conclusion: Ketotifen had a faster onset of action and provided better symptom relief than Cromolyn. The rapid onset of action and symptom control, make Zaditen a valuable treatment for VKC. Keywords : VKC , allergic conjuctivitis , zaditen
Evaluation of keratoconus by videokeratography in subjects with vernal keratoconjunctivitis (VKC)
MR Shoja,MR Besharati
Journal of Research in Medical Sciences , 2006,
Abstract: BACKGROUND: To assess demographic variables and the incidence of keratoconus in patients with VKC and to evaluate the characteristics of Vernal Keratoconjunctivitis (VKC) associated with keratoconus. METHODS: One hundred and fifty patients with VKC were studied at Ophthalmology Department of Shaheed Sadoughi medical center between October 2004 and June 2005. Both eyes of VKC patients were evaluated by Orbscan topography for the diagnosis of keratoconus. Corneal topography maps were examined with modified Robinowitz-McDonnell test. The characteristics of VKC were recorded in keratoconus patients. RESULTS: The study included 93 male and 57 female subjects. The patients mean age was 13.07 ± 4.71 (range 8-24) years. The clinical forms of VKC were as follows: 45.2% mixed, 38% palpebral and 16.7% limbal types. Fifty four (36%) of 150 subjects with VKC had complications of pseudogerontoxon, punctate keratitis and shield ulcer. Eighty-four eyes (42 subjects) of 150 patients with VKC were detected as having keratoconus by videokeratography maps (28%). There were 27 males and 15 females in keratoconus group. 16.7% of the eyes had mild, 33.3% had moderate and 50% had severe keratoconus. Eyes with severe keratoconus presented at younger age (12.7 ± 3.35 years) than moderate keratoconus (18.3 ± 2.15 years). Keratoconus was more common in male gender, long-standing disease, mixed and palpebral VKC. CONCLUSION: Screening of keratoconus subjects with corneal topography allows early detection and management of keratoconus. The higher incidence of keratoconus in our study is due to videokeratography study of early keratoconus. KEYWORDS: VKC, videokeratography, keratoconus.
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