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Search Results: 1 - 10 of 5219 matches for " Uttara Roy "
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Crash Severity Analysis of Single Vehicle Run-off-Road Crashes  [PDF]
Sunanda Dissanayake, Uttara Roy
Journal of Transportation Technologies (JTTs) , 2014, DOI: 10.4236/jtts.2014.41001
Abstract:

Run-off-road crashes in the United States have become a major cause of serious injuries and fatalities. A significant portion of run-off-road crashes are single vehicle crashes that occur due to collisions with fixed objects and overturning. These crashes typically tend to be more severe than other types of crashes. Single vehicle run-off-road crashes that occurred between 2004 and 2008 were extracted from Kansas Accident Reporting System (KARS) database to identify the important factors that affected their severity. Different driver, vehicle, road, crash, and environment related factors that influence crash severity are identified by using binary logit models. Three models were developed to take different levels of crash severity as the response variables. The first model taking fatal or incapacitating crashes as the response variable seems to better fit the data than the other two developed models. The variables that were found to increase the probability of run-off-road crash severity are driver related factors such as driver ejection, being an older driver, alcohol involvement, license state, driver being at fault, medical condition of the driver; road related factors such as speed, asphalt road surface, dry road condition; time related factors such as crashes occurring between 6 pm and midnight; environment related factors such as daylight; vehicle related factors such as being an SUV, motorcycles, vehicle getting

Comparative Analysis of Fatal Pedestrian Crashes between Kansas and USA  [PDF]
Uttara Roy
Journal of Transportation Technologies (JTTs) , 2019, DOI: 10.4236/jtts.2019.93024
Abstract: Due to the increasing trend of population growth and urbanization, pedestrians form one of the largest single road user groups. However, they are the most neglected group among all road users. Pedestrian safety is now a growing concern in the USA. Identifying the factors associated with fatal pedestrian crashes plays a key role in developing efficient and effective strategies to enhance pedestrian safety. This study addresses safety issues by identifying contributory factors associated with fatal pedestrian crashes in Kansas and the USA. For Kansas, the study uses KARS (Kansas Accident Reporting System) database while for the USA FARS (Fatality Analysis Reporting System) database has been used. Different variables considered in this study are human variables (age, and gender), environmental variables (atmospheric condition and light condition), time (time of day, day of week, and crash month), location (intersection vs. mid-block), and roadway variables (speed limit). Different factors that are found to have an association with fatal pedestrian crashes are male pedestrians, older pedestrians, weekend, off peak hours, winter months, dark hours, non-intersection, clear atmospheric conditions, higher speed limit. The findings from Kansas have been compared with that from the USA. This study helps to implement potential countermeasures by identifying the factors that have an association with fatal pedestrian crashes.
Urinary Level of CA19-9 as a Tumor Marker in Urothelial Carcinoma of the Bladder
Keya Pal,Suparna Roy,Samim Ali Mondal,Uttara Chatterjee
Urology Journal , 2011,
Abstract: Purpose: To diagnose the urothelial carcinoma of the bladder by measuringCA19-9 level in the urine. Materials and Methods: This study was conducted on 47 patients with histopathologically confirmed urothelial cancer and 50 control subjects. Theurinary level of CA19-9 was measured in both groups by enzyme-linke dimmunosorbent assay after concentration of urine with Bio-Gel dry beads. Urine cytology was also done in both controls and patients. Results: The mean urinary level of CA19-9 was 194.59 ± 110.56 u/mL in patients and 11.67 ± 8.42 u/mL in controls (P = .0001). The mean urinary level of CA19-9 in patients with low-grade and high-grade bladder cancer was 206.56 ± 114.56 u/mL and 174.80 ± 94.06 u/mL, respectively(P = .56). Urine cytology by Papanicolaou stain was mostly negative. Conclusion: It can be concluded that CA19-9 may be a useful non-invasivetest to diagnose the urothelial carcinoma of the bladder.
A histopathological study of liver and biliary remnants with clinical outcome in cases of extrahepatic biliary atresia
Roy Paromita,Chatterjee Uttara,Ganguli M,Banerjee Sugato
Indian Journal of Pathology and Microbiology , 2010,
Abstract: Context: The indicators of poor prognosis in cases of extrahepatic biliary atresia (EHBA) continue to remain controversial. Aims: To correlate the histopathological findings of wedge biopsy from liver and tissue obtained from the shaving at the porta hepatis, during hepatic portoenterostomy, with the clinical outcome. Materials and Methods: All cases of EHBA surgically treated in our hospital from 1995 to 2006 have been reviewed. Wedge biopsies of the liver and biopsies from the porta hepatis were analyzed with hemotoxylin-eosin stains and immunohistochemistry. The parameters correlated with clinical outcomes were - presence of large bile ducts ( > 150μm diameter) in the portal tissue plaque, degree of fibrosis (semi-quantitative; graded as mild, moderate and severe), presence of ductal plate malformation (DPM) and age at operation. Results: The proportions of patients with small or large ductal diameter who remained clinically controlled (serum bilirubin < 1.5mg/dl with no evidence of end stage liver failure) were 39% and 66.6% respectively (P=0.44). There was a highly significant correlation between the extent of fibrosis and clinical outcome. Mild, moderate and severe fibrosis resulted in clinical control rates of 78.5%, 34.4% and 24% respectively (P=0.001). Ductal plate malformation was seen in 15% of our cases and was uniformly associated with poor outcome. A non-significant trend towards poorer outcome was seen with increasing age at surgery. Conclusions: Histopathological correl ations with clinical outcome in EHBA have been rarely reported from the Indian subcontinent. A greater degree of fibrosis at the time of hepatic portoenterostomy and presence of ductal plate malformation is associated with a significantly poorer clinical outcome.
Standardization and evaluation of safety of a herbomineral formulation Articulin forte tablets
Joshi Uttara,Mhasakar Vandana
Research in Pharmacy , 2012,
Abstract: In the earlier days physicians used to be the formulator and all the processes rightfrom collection to dispensing were controlled by them. In last few decades, there hasbeen tremendous growth in the field of herbal medicines. It has become necessary to laydown stringent parameters to ensure batch to batch consistency and reproducibility.Therefore, standardization of herbal formulations has become extremely essential inorder to assess the quality, purity, safety and efficacy of drugs based on the amounts oftheir active principles. Heavy metal toxicity being a major safety issue in Ayurvedicformulations, it is essential to evaluate them for heavy metal content. Articulin ForteTablet is a well-known herbomineral formulation used for rheumatoid arthritis. Inpresent studies, Articulin Forte Tablets were evaluated for heavy metal contents.
Performance Analysis of Mimo Radar Waveform Using Accelerated Particle Swarm Optimization Algorithm
B. Roja Reddy,Uttara Kumari
Signal & Image Processing , 2012,
Abstract: The Accelerated Particle Swarm Optimization Algorithm is promoted to numerically design orthogonal Discrete Frequency Waveforms and Modified Discrete Frequency Waveforms (DFCWs) with good correlation properties for MIMO radar. We employ Accelerated Particle Swarm Optimization algorithm (ACC_PSO), Particles of a swarm communicate good positions, velocity and accelerations to each other as well as dynamically adjust their own position, velocity and acceleration derived from the best of all particles. The simulation results show that the proposed algorithm is effective for the design of DFCWs signal used in MIMO radar.
STANDARDIZATION AND EVALUATION OF ARTICULIN FORTE TABLETS
Joshi Uttara,JagtapMeenakshi,Diwakar Arohi
International Journal of Research in Ayurveda and Pharmacy , 2012,
Abstract: Herbal medicines have a long therapeutic history and are still serving the needy. However, the quality control of herbal medicines still remains a challenge because of the complex nature of the phytoconstituents and therefore it is difficult to establish standards for raw materials and finished products. The objective of the present study is to evaluate Articulin Forte tablets which is a well-known herbomineral formulation used for rheumatoid arthritis. The tablets were evaluated for physical parameters, fluorescence analysis and identification by TLC analysis.
A Novel Method for Obtaining a Better Quality Speech Signal for Cochlear Implants using Kalman with DRNL and SSB Technique
Rohini S. Hallikar,Uttara Kumari,K Padmaraju
Advanced Computing : an International Journal , 2012,
Abstract: Cochlear implant devices are known to exist since a long time. The purpose of the present work is to develop a speech algorithm for obtaining robust speech. In this paper, the technique of cochlearimplant is first introduced, followed by discussions of some of the existing techniques available for obtaining speech. The next section introduces a new technique for obtaining robust speech. The key feature of this technique lies in the use of the advantages of an integrated approach involving the use of an estimation technique such as a kalman filter with non linear filter bank strategy, using Dual Resonance Non Linear(DRNL) and Single Side Band(SSB) Encoding method. A comparative study of the proposed method with the existing method indicates that the proposed method performs well compared to the existing method.
Pulmonary Edema in Myasthenic Crisis
Uttara Swati Anand,Stalin Viswanathan,Jayanthi Arulneyam
Case Reports in Critical Care , 2013, DOI: 10.1155/2013/863620
Abstract: We report a previously asymptomatic 50-year-old lady who came with myasthenic crisis as initial presentation of myasthenia gravis. She developed pulmonary edema following intravenous immunoglobulin administration and had ischemic changes in ECG and left ventricular dysfunction on echocardiography. She improved with diuretics, dobutamine, and fluid restriction alone. This is the first report in English-language medical literature describing the association between myasthenic crisis and likely takotsubo cardiomyopathy-related pulmonary edema following intravenous immunoglobulin administration. 1. Introduction Myasthenia gravis (MG) is an antibody-mediated neurological disorder that affects the neuromuscular junction [1]. Myasthenic crisis is characterized by respiratory failure that requires mechanical ventilation [2]. Takotsubo cardiomyopathy is defined as a profound but reversible left ventricular dysfunction in the absence of coronary artery disease [3]. We present a 50-year-old lady with myasthenic crisis (MC), who developed pulmonary oedema following intravenous immunoglobulin (IVIG) and was found to have features suggestive of takotsubo cardiomyopathy (TC). 2. Case She had had cough, rhinorrhoea, headache, myalgias, and fever for 10 days and presented to another hospital with fatigue of a week’s duration, breathlessness, slurring of speech, and nasal regurgitation of liquids for two days. She was intubated and then transferred to our institution. On admission, she was conscious and afebrile with tachycardia (110/min), tachypnoea (22/min), and normal blood pressure. Cardiovascular and respiratory system examination was otherwise normal. Neurologically, she had flaccid quadriparesis (2/5), floppy neck, and bilateral facial nerve paralysis without ocular weakness or bladder incontinence. Chest radiograph (CXR), electrocardiogram (ECG), renal and liver function tests, and haemogram were normal. An initial diagnosis of Guillain-Barre syndrome was made and intravenous immunoglobulin (IVIG) was initiated at a dose of 0.4?g/kg/day. On the second day she had asymmetrical ptosis; 1?mg neostigmine administration led to improvement in ptosis and muscle power (4-/5) and neostigmine 30?mg every 4th hour was continued thereafter. Later during the day, tachycardia, tachypnoea, hypotension (96/60?mmHg), and left-sided infra-axillary crackles were observed. Chest radiograph revealed infiltrates in the left mid-zones (Figure 1(a)); ECG showed occasional VPCs (Figure 2(a)), and her total leukocyte counts were 20 × 109/L. Respiratory alkalosis was seen on arterial blood
A novel method for obtaining a better quality speech signal for cochlear Implants using kalman with drnl and ssb technique
Rohini S. Hallikar,Uttara Kumari,K Padmaraju
Computer Science , 2012,
Abstract: Cochlear implant devices are known to exist since a long time. The purpose of the present work is to develop a speech algorithm for obtaining robust speech. In this paper, the technique of cochlear implant is first introduced, followed by discussions of some of the existing techniques available for obtaining speech. The next section introduces a new technique for obtaining robust speech. The key feature of this technique lies in the use of the advantages of an integrated approach involving the use of an estimation technique such as a kalman filter with non linear filter bank strategy, using Dual Resonance Non Linear(DRNL) and Single Side Band(SSB) Encoding method. A comparative study of the proposed method with the existing method indicates that the proposed method performs well compared to the existing method.
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