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Search Results: 1 - 10 of 3382 matches for " Sanjay Tiwari "
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Aperture Coupled Microstrip Antenna for Dual-Band  [PDF]
Rajesh Kumar Vishwakarma, Sanjay Tiwari
Wireless Engineering and Technology (WET) , 2011, DOI: 10.4236/wet.2011.22013
Abstract: This paper presents air gap aperture coupled microstrip antenna for dual-band operation over the frequency range of (2.9 to 6.0 GHz). This antenna differs from any other microstrip antenna with their feeding structure of the radiating patch element. Input signal couples to the radiating patch trough the aperture that exists on the ground plane of microstrip feed line. The dual-band achieved by variation of air gap [2 mm to 6 mm] between single patch antenna and aper-ture coupled microstrip antenna. The main advantage of this type antenna is increased the bandwidth of the antenna as compared to a single layered patch antenna. The two resonant frequencies can vary over a wide frequency range and the input impedance is easily matched for both frequencies. The obtain ratios of resonance frequencies are variable from 2.1 GHz to 1.1 GHz with increasing the air gap between single patch and aperture coupled microstrip antenna. The measured return loss [–14 dB] exhibits an impedance bandwidth of 35%. The input impedance and VSWR return loss have been measured with the help of Network analyzer.
Fingertip injuries
Saraf Sanjay,Tiwari V
Indian Journal of Orthopaedics , 2007,
Abstract: Background: Fingertip injuries are extremely common. Out of the various available reconstructive options, one needs to select an option which achieves a painless fingertip with durable and sensate skin cover. The present analysis was conducted to evaluate the management and outcome of fingertip injuries. Materials and Methods: This is a retrospective study of 150 cases of fingertip Injuries of patients aged six to 65 years managed over a period of two years. Various reconstructive options were considered for the fingertip lesions greater than or equal to 1 cm 2 . The total duration of treatment varied from two to six weeks with follow-up from two months to one year. Results: The results showed preservation of finger length and contour, retention of sensation and healing without significant complication. Conclusion: The treatment needs to be individualized and all possible techniques of reconstruction must be known to achieve optimal recovery.
Neeraj Tiwari,Sanjay Kumar
Journal of Reliability and Statistical Studies , 2008,
Abstract: The problem of minimum risk point estimation under squared-error loss function (SELF) for the parameter associated with the generalized life distributions, is considered. The failure of fixed sample size procedure is established. Sequential procedure using uniformly minimum variance unbiased estimator (UMVUE) at both the stopping and estimation stages is developed and the second-order approximations are derived. The regret of the sequential procedure is obtained and the condition under which the regret may be negative is discussed. Finally, an improved estimator is proposed and its dominance over the UMVUE (in terms of having smaller risk) is also established.
The investigation of medical and psychosocial problems of geriatric population in the urban area of Madhya Pradesh in India  [PDF]
Sanjay Kumar Gupta, Atul Varshney, Sharad Chandra Tiwari, Mohan Shinde
Open Journal of Internal Medicine (OJIM) , 2012, DOI: 10.4236/ojim.2012.23026
Abstract: Globally, there are an estimated 605 million people aged 60 years and above. Improvements in health care facilities have brought longevity, which is considered to be one of the greatest achievements of the 20th century. Objectives: To assess the morbidity pattern in geriatric people. Methodology: A community based cross sectional study. Results: Out of 208 aged 91 (43.7%) were males, 117 (56.25%) were females. Maximum number of males and females were from the age group 60 - 64 years. 117 (56.25%) had chronic problems and 15 (7.2%) acute. Musculo skeleton problem was the commonest (63%) complaint both in males and females, followed by cardio vascular problem (44%). Diabetes mellitus was more common in males than females and hypertension was more common in females than males. Chronic bronchitis was the commonest respiratory disorder in males (8.7%). Total 20 (9.6%) had psychological problems (depression), psychological problems more common in males 11 (12%) than females 9 (7.7%) Conclusion: The present study showed that chronic morbidity in elderly was significantly higher (56.3%) than acute (7.2%), most commonly affected system by chronic morbidity was musculo-skeletal followed by cardio vascular (CVS) and gastrointestinal (GIT). Psychological problems were more common in males (12%) than in females (7.7%). Psychological problems were more in lower socio-economic class-(V) than higher Class [1].
Aperture coupled stacked patch antenna for dual band
Rajesh Kumar Vishwakarma,Sanjay Tiwari
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: -Microstrip antennas (MAS) are very useful antenna where low profile antennas are required. They are most popular due to their small size, low cost, light weight. The first aperture coupled microstrip antenna was introduced in 1985 by D M Pozar. Aperture coupled antenna is a particular antenna with high gain and wide bandwidth. This paper presents aperture coupled stacked patch antenna using air gap variation. The variation of air gap [2mm to 6mm] has been done between single patch antenna and an aperture coupled antenna. The main advantage of this antenna to increase the band width of the antenna as compared with single layered patch antenna. The resonant frequencies changes with air gap variations. The feed can be done either a conventional coaxial probe or through a coupling aperture in the ground plane as we done. This antenna works well in the frequency range (2.9 GHz to 6.0 GHz). The measured return loss exhibit an impedance bandwidth of 35%.The input impedance and VSWR return loss have been measured with the help of Network analyzer. [Agilent E8363B A.04.06] From the measured result it is found that the value of VSWR corresponding lower resonance frequencies increases from 14 to 2.2 with increasing air gap variation where as at the upper resonance frequencies is also increased from 1.8 to 2.3.
Medication prescribing errors in a public teaching hospital in India: A prospective study
Pote,Sayali; Tiwari,Pramil; D'Cruz,Sanjay;
Pharmacy Practice (Internet) , 2007, DOI: 10.4321/S1886-36552007000100003
Abstract: background: to prevent medication errors in prescribing, one needs to know their types and relative occurrence. such errors are a great cause of concern as they have the potential to cause patient harm. the aim of this study was to determine the nature and types of medication prescribing errors in an indian setting. methods: the medication errors were analyzed in a prospective observational study conducted in 3 medical wards of a public teaching hospital in india. the medication errors were analyzed by means of micromedex drug-reax database. results: out of 312 patients, only 304 were included in the study. of the 304 cases, 103 (34%) cases had at least one error. the total number of errors found was 157. the drug-drug interactions were the most frequently (68.2%) occurring type of error, which was followed by incorrect dosing interval (12%) and dosing errors (9.5%). the medication classes involved most were antimicrobial agents (29.4%), cardiovascular agents (15.4%), gi agents (8.6%) and cns agents (8.2%). the moderate errors contributed maximum (61.8%) to the total errors when compared to the major (25.5%) and minor (12.7%) errors. the results showed that the number of errors increases with age and number of medicines prescribed. conclusion: the results point to the establishment of medication error reporting at each hospital and to share the data with other hospitals. the role of clinical pharmacist in this situation appears to be a strong intervention; and the clinical pharmacist, initially, could confine to identification of the medication errors.
A Replication Protocol for Real Time database System
Ashish Srivastava,Udai Shankar,Sanjay Kumar Tiwari
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: Database replication protocols for real time system based on a certification approach are usually the best ones for achieving good performance. The weak voting approach achieves a slightly longer transaction completion time, but with a lower abortion rate. So, both techniques can be considered as the best ones for replication when performance is a must, and both of them take advantage of the properties provided by atomic broadcast. We propose a new database replication strategy that shares many characteristics with such previous strategies. It is also based on totally ordering the application of writesets, using only an unordered reliable broadcast, instead of an atomic broadcast. Additionally, the writesets of transactions that are aborted in the final validation phase along with verification phase incorporated in the new system are not broadcast in our strategy rather than only validation phase. Thus, this new approach certainly reducesc the communication traffic and also achieves a good transaction response time (even shorter than those previous strategies associated with only validation phase in some system configurations).
Comparison of face Recognition Algorithms on Dummy Faces
Aruni Singh,Sanjay Kumar Singh,Shrikant Tiwari
International Journal of Multimedia & Its Applications , 2012,
Abstract: In the age of rising crime face recognition is enormously important in the contexts of computer vision, psychology, surveillance, fraud detection, pattern recognition, neural network, content based video processing, etc. Face is a non intrusive strong biometrics for identification and hence criminals always try to hide their facial organs by different artificial means such as plastic surgery, disguise and dummy. The availability of a comprehensive face database is crucial to test the performance of these face recognition algorithms. However, while existing publicly-available face databases contain face images with a wide variety of poses, illumination, gestures and face occlusions but there is no dummy face database is available in public domain. The contributions of this research paper are: i) Preparation of dummy face database of 110 subjects ii) Comparison of some texture based, feature based and holistic face recognition algorithms on that dummy face database, iii) Critical analysis of these types of algorithms on dummy face database.
Low Back Pain among Textile Workers
Tiwari Rajnarayan,Pathak Mrinalini,Zodpey Sanjay
Indian Journal of Occupational and Environmental Medicine , 2003,
Exigent Vulnerability in Mobile Ad-hoc Network and Solutions in Context of Energy Optimization with Clustering Technique
Keshav Kumar Tiwari,Prof. Sanjay Agrawal?
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: Mobile ad-hoc network is collection of mobile nodes that are physically located at various locationand there interconnections between nodes are capable of changing on a continual basis. Energy is a limitingfactor in success of any mobile ad-hoc network. In Mobile ad-hoc network, mobile devices are mainlyoperated by battery so energy optimization is an important issues in MANET. Both minimization of powerand other QoS requirements like delay, throughputs are have to be take care properly. Without affecting theQoS we should conserve the energy of mobile nodes but it is very complex to overcome from this. Powerconsumption can be reduced at device level, at transmission level or may be by using optimized power awarerouting protocol. In this paper we have given a brief description of basic aspects of mobile ad hoc networkand studied various power saving techniques in mobile ad hoc network & given a comparative analysis ofthese techniques. In this paper we also suggest an approach for energy conservation by CBIR.
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