2016 ( 9 )

2015 ( 38 )

2014 ( 99 )

2013 ( 187 )


匹配条件: “Suchita Shrestha” ,找到相关结果约874条。
Monitoring and conservation of bats in the Kathmandu valley, Nepal
Sanjan Thapa,Suchita Shrestha,Sagar Dahal,B. A. Daniel
Asian Journal of Conservation Biology , 2012,
Abstract: The Kathmandu Valley has been a centre for bat study since the 19th century. Twenty five species of bats have been documented from Kathmandu Valley including two species of fruit bats until 1997. Opportunistic and sporadic survey was continued then after. There was a gap of more than a decade for monitoring. A recent preliminary survey in 2008 re-recorded only three species which revealed the need for detailed monitoring. Bats conservation is a rare practice in Nepal which lags behind neighboring countries. The negative perception of the bats and lack of awareness is the primary factor for the lack of conservation. This project is designed to redress this at twenty sites within the Kathmandu Valley where mist and scoop nettings together with roost survey were carried out. Lectures to schoolchildren were the primary conservation action along with radio-awareness programmes. Twelve species was re-recorded excluding fruit bats and two unidentified species (Pipistrellus sp. and Myotis sp.). Specific roost sites and foraging habitats were discovered and documented in the study area. A new site of occurrence of vulnerable species Mandelli’s Mouse-eared Myotis Myotis sicarius was identified. A special trend of seasonal variation in species at few study sites was observed while in few the species were found resident. Thirteen half hour radio programmes about bats were successfully broadcast throughout Nepal from Radio Kantipur. Lectures of 45 minutes were delivered to in an average 75 schoolchildren per school at twenty schools in fifteen project sites. Post project effectiveness evaluation should be carried out.
Synthesis, Characteristics and Physico-chemical Study of Some Dichloro Pyrazoles
Suchita Nimbalkar
International Journal of Chemistry , 2012, DOI: 10.5539/ijc.v4n2p108
Abstract: Some new 3,5-Diaryl-1-substituted pyrazoles have been synthesized by the action of isonicotinic acid and thio-semicarbazide on 3-iodo flavanones in pyridine medium. 3-iodo flavanones obtained from 2-hydroxy-3,5-dichloro chalcones and ICl in acetic acid. Structure of these compounds has been established by chemical and spectral analysis (NMR & IR). Purity of these heterocycles was checked by TLC. The interaction of Cu(II), Co(II) with 1-carboxamido-3-(2-hydroxy-3,5-dichloro pheyl)-5-(4-methoxy phenyl) pyrazole (L1), 1-thiocarbaxomedo-3(2-hydroxy-3,5-dichloro pheyl)-5-(4-methoxy phenyl) pyrazole (L2) have been carried out by employing Bjerrum -Calvin pH metric titration technique, at 27oC in 70 % dioxane-water medium. The data obtained can be used for the determination of proton ligand formation numbers (n). From the formation curve, the proton-ligand stability constant pK values have been evaluated using half integral method. The metal ligand formation numbers (n) are estimated by using Irving Rossotti’s expression. Metal-Ligand stability constants for 1:1 complex & 1:2 complex have been calculated which are designated by letters log K1 & log K2 respectively.
Comparative prevalence of MRSA in two Nepalese tertiary care hospitals  [PDF]
Bidya Shrestha
Open Journal of Clinical Diagnostics (OJCD) , 2013, DOI: 10.4236/ojcd.2013.32013
Abstract: This comparative study has been focused on the prevalence of MRSA types and their antibiotic resistance in two tertiary care hospitals of Nepal. During November 2007 to June 2009, clinical samples from patients with nosocomial infection from two Nepali hospitals, Kathmandu Based Hospital (KBH) and Lalitpur Based Hospital (LBH) were cultured and antibiotic susceptibility tests done following standard methodology in Microbiology laboratory, Tribhuvan University Teaching Hospital, Kathmandu, Nepal. Occurrence of MRSA (52.9% of 304 Staphylococcus aureus isolates) in KBH and that of MSSA (62% of 100 S. aureus isolates) in LBH were significant. No association of age was observed with MRSA or MSSA. Among MSSA from both hospitals, the highest resistance was found against penicillin. KBH urinary isolates were resistant to norfloxacin (51.4%), while isolates from other sites were resistant to ciprofloxacin (30.6%), erythromycin (12%), gentamicin (10.3%). LBH isolates were resistant to co-trimoxazole (22.6%), erythromycin (17.2%), ciprofloxacin (13.8%), gentamicin (12.9%). Among MRSA, most of the isolates from both hospitals were resistant to a wide array of antibiotics. A majority of the MSSA and MRSA isolates were susceptible to rifampicin and chloramphenicol. Most of KBH MRSA were homogeneous MRSA, 80.5% (significant), of which, 99.2% were multiresistant oxacillin resistant S. aureus (MORSA). And among the heterogeneous MRSA isolates from KBH, 71% were MORSA. On the other hand, among LBH MRSA isolates, 52.6% were homogeneous MRSA, cent percent of which were MORSA while 47.4% were heterogeneous MRSA of which 44.5% were MORSA. Since almost all of the homogeneous MRSA and most of the heterogeneous MRSA from both hospitals were MORSA, there is a possibility that a hospital acquired S. aureus could be MORSA. Hence, every infected patient should be considered as a potential source of MORSA.
Design of Low Power VCO using >2G Hz Technology
suchita subhash uparkar
International Journal of Advances in Engineering Sciences , 2011,
Abstract: The design challenges are increasing with the increase in demand for low power, high-frequency wireless systems. The reasons are poor phase noise performance of integrated VCO and large area taken by the loop filter. Many recent reporting show that with careful design, on-chip VCO can be made to give comparable phase noise performance with off-chip VCO. In this paper we have presented a design of a ring oscillator which is implemented in CMOS.
Use of XML to Persist and Transfer Offline Data For Personalized Profiles
Sandeep Chawla,Suchita Goyal
International Journal of Computer Science Issues , 2010,
Abstract: As the internet proliferates a web of interlinked data wider across the globe and deeper into the remotest areas, many more users across the globe are getting access to the web. With the advent of Web 2.0 the pattern of internet usage has undergone a paradigm shift. Every user enjoys a virtual presence by creating personalized profiles at different portals like social network websites Facebook, LinkedIn etc and as in our case faculty/employees profiles at College/Organization. These profiles act as a repository of information of the user and help the employers/students to choose their prospective employees/institutions. Thus these profiles need to be regularly updated over the internet. At times , when a user wants to update his/her profile, there is a chance that net could be disconnected or very slow for images and publications etc. to upload, or there could be a chance that the user wants to have a full preview of his updates and uploads, before he actually wastes his bandwidth and hours on it. Keeping in mind these points of views we started to develop a desktop application that would aid the faculty at Delhi College of Engineering in updating their profiles at official website with ease. Through this paper we present user profile manger in the form of a desktop application. The tool is specifically engineered to facilitate the faculty members to regularly update their profiles and other auxiliary information on the college website remotely via their desktop. This tool is predominantly developed in C# programming language and relies on Microsoft.NET Framework 2.0. The application highlights the interaction of C# with a remote database server and ability of XML to persist data at client side and transfer the same also. We present a detailed look into the architecture of our application and then implement a prototype of the same.
BER Comparison of Rayleigh Fading, Rician Fading and AWGN Channel using Chaotic Communication based MIMO-OFDM System
Suchita Varade,Kishore Kulat
International Journal of Soft Computing & Engineering , 2012,
Abstract: This paper proposes, a technique which uses chaotic communication system combined with adaptive beamforming, for secure communications and to improve the system performance by mitigating interference. For secure communications, chaotic sequences are used. Many chaotic communication systems have been proposed, but most of them show a poor performance under realistic channel conditions (i.e. noise and multipath fading).This paper proposes a wireless communication structure based on two coupled chaotic systems. In order to enhance the error-rate performance of MIMO-OFDM system, adaptive beamforming is used. Evaluation and comparison of the performances of MIMO- OFDM system in the AWGN (Additive White Gaussian Noise) channel, Rician fading channel and the Rayleigh fading channel are provided. Results are verified and analyzed for two cases, one when adaptive beamforming is used in the proposed system and second when adaptive beamforming is not used in the proposed system. Computer simulations are done to verify the performance of the proposed approach. A simulation tool with a Graphical User Interface (GUI) which implements these algorithms is also developed to provide ease in the execution
Transmit Beamforming for Performance Enhancement of IEEE 802.16e Mobile WiMAX
Ekta Tiwari,Suchita Varade
International Journal of Soft Computing & Engineering , 2013,
Abstract: This paper aims at performance evaluation of mobile WiMAX system which uses multiple antenna technique such as space time block coding space time trellis coding with and without transmit beamforming for multiple transmit and multiple receive antennas. The mobile WiMAX system has been analyzed for modulation scheme such as mPSK along with different combination of multiple transmit and receive antenna. Computer simulations are done using MATLAB 7.10.The performance of the proposed system has been analyzed in terms of bit error rate (BER). Simulation results shows that the multiple antenna technique in combination with transmit beamforming improves the performance of mobile WiMAX system in terms of BER as number of transmitting antenna increases without increasing the transmit power and bandwidth.
A Comparative Study on Distance Measuring Approaches for Clustering
Shraddha Pandit,Suchita Gupta
International Journal of Research In Computer Science , 2011,
Abstract: Clustering plays a vital role in the various areas of research like Data Mining, Image Retrieval, Bio-computing and many a lot. Distance measure plays an important role in clustering data points. Choosing the right distance measure for a given dataset is a biggest challenge. In this paper, we study various distance measures and their effect on different clustering. This paper surveys existing distance measures for clustering and present a comparison between them based on application domain, efficiency, benefits and drawbacks. This comparison helps the researchers to take quick decision about which distance measure to use for clustering. We conclude this work by identifying trends and challenges of research and development towards clustering.
Correction of Severe Anemia in a Patient with End Stage Renal Disease and Myelodysplastic Syndrome  [PDF]
Ankita Patel, Suchita Mehta, Ahmad Waseef, Subodh Saggi
Open Journal of Nephrology (OJNeph) , 2014, DOI: 10.4236/ojneph.2014.43018
Abstract: Background: Anemia is a common complication of end-stage renal disease (ESRD) and is effectively managed by Erythropoietin Stimulating Agents (ESAs) and intravenous iron therapy. Management of anemia in ESRD patients with myelodysplastic syndrome (MDS) poses a unique challenge. ESAs even at extremely high doses do not result in a desired response, especially if the patients are iron-overloaded. Case: A 72-year-old man with history of ESRD and MDS on hemodialysis since September 2009 was severely anemic requiring massive doses of ESA in excess of 90,000 units/week. Iron saturation was consistently >60%; ferritin was >2500. Desferrioxamine (DFO) 125 mg IV/week was begun in November 2010. His PRBC transfusion and ESA requirements declined after the initiation of this therapy. He had 33 ER visits for PRBC transfusions (1 - 3 transfusions/visit) from September 2009 to November 2010 (average: 2.35/month), which decreased to 18 visits in 20 months (average: 0.9/month) after getting DFO. Conclusion: We report a case of MDS with ESRD on hemodialysis where anemia was managed with Desferrioxamine therapy along with ESA, after which it was noted that there was a significant reduction in the number of PRBC transfusions that the patient received along with a decrease in ESA requirements and a decrease in number of hospitalizations, which in the long term could be cost effective.
Long Lead-Time Streamflow Forecasting Using Oceanic-Atmospheric Oscillation Indices  [PDF]
Niroj Kumar Shrestha
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.66062

Climatic variability influences the hydrological cycle that subsequently affects the discharge in the stream. The variability in the climate can be represented by the ocean-atmospheric oscillations which provide the forecast opportunity for the streamflow. Prediction of future water availability accurately and reliably is a key step for successful water resource management in the arid regions. Four popular ocean-atmospheric indices were used in this study for annual streamflow volume prediction. They were Pacific Decadal Oscillation (PDO), El-Nino Southern Oscillation (ENSO), Atlantic Multidecadal Oscillation (AMO), and North Atlantic Oscillation (NAO). Multivariate Relevance Vector Machine (MVRVM), a data driven model based on Bayesian learning approach was used as a prediction model. The model was applied to four unimpaired stream gages in Utah that spatially covers the state from north to south. Different models were developed based on the combinations of oscillation indices in the input. A total of 60 years (1950-2009) of data were used for the analysis. The model was trained on 50 years of data (1950-1999) and tested on 10 years of data (2000-2009). The best combination of oscillation indices and the lead-time were identified for each gage which was used to develop the prediction model. The predicted flow had reasonable agreement with the actual annual flow volume. The sensitivity analysis shows that the PDO and ENSO have relatively stronger effect compared to other oscillation indices in Utah. The prediction results from the MVRVM were compared with the Support Vector Machine (SVM) and the Artificial Neural Network (ANN) where MVRVM performed relatively better.


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