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FBG Based High Sensitive Pressure Sensor and Its Low-Cost Interrogation System With Enhanced Resolution

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Photonic Sensors 2015年第4期5卷 321-329页

作者： Vengal Rao PACHAVA Srimannarayana KAMINENI sai Shankar MADHUVARASU kishore PUTHA Venkata Reddy MAMIDI Department of Physics National Institute of Technology Warangal 506004 lndia

A fiber Bragg grating （FBG） pressure sensor with high sensitivity and resolution has been designed and demonstrated. The sensor is configured by firmly fixing the FBG with a metal bellows structure. The sensor works by means of measuring the Bragg wavelength shift of the FBG with respect to pressure change. From the experimental results, the pressure sensitivity of the sensor is found to be 90.6proJpsi, which is approximately 4000 times as that of a bare fiber Bragg grating. A very good linearity of 99.86% is observed between the Bragg wavelength of the FBG and applied pressure. The designed sensor shows good repeatability with a negligible hysteresis error of 4-0.29 psi. A low-cost interrogation system that includes a long period grating （LPG） and a photodiode （PD） accompanied with simple electronic circuitry is demonstrated for the FBG sensor, which enables the sensor to attain high resolution of up to 0.025 psi. Thermal-strain cross sensitivity of the FBG pressure sensor is compensated using a reference FBG temperature sensor. The designed sensor can be used for liquid level, specific gravity, and static/dynamic low pressure measurement applications.

关键词： Fiber Bragg grating metal bellows pressure long period grating

Arthroscopic findings after manipulation under anesthesia in idiopathic capsulitis of the shoulder:A prospective study

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World Journal of Clinical Cases 2023年第34期11卷 8147-8152页

作者： sai Krishna Mlv ravi Mittal Nitin Chauhan Department of Orthopaedics Aayush HospitalEluru 534002Andhra PradeshIndia Department of Orthopaedics All India Institute of Medical SciencesNew Delhi 110029India

BACKGROUND Manipulation under anesthesia(MUA)of the shoulder joint is a commonly used method for the treatment of adhesive *** it has been known to be associated with a variety of complications,there is a paucity of studies describing the arthroscopic findings after *** To describe the arthroscopic findings in patients with idiopathic adhesive capsulitis of the shoulder after *** We recruited 28 patients with idiopathic adhesive capsulitis who underwent arthroscopic capsular *** of the shoulder was performed under anesthesia in all of these patients before capsular ***-articular findings were recorded during arthroscopic capsular release in these *** All patients showed the presence of ***-seven patients showed tears in the capsule on the anterior *** patient had an avulsion of the anterior rim of the glenoid and labrum following the *** patients had partial rotator cuff tears,and one patient showed a superior labrum anterior posterior lesion,which was not diagnosed preoperatively on magnetic resonance *** MUA leads to rupture of the capsule,which is the desired ***,the site of rupture of the capsule is dependent on the maneuvers of *** addition,partial tears of the rotator cuff and osteochondral fractures of the glenoid can also occur.

关键词： Frozen shoulder Arthroscopy Manipulation under anesthesia Prospective study

Ichnology and Depositional Environment of the Cambrian Nagaur Sandstone (Nagaur Group) Along the Dulmera Section, Bikaner-Nagaur Basin, Rajasthan

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Acta Geologica Sinica(English Edition) 2014年第6期88卷 1665-1680页

作者： Birendra P.SINGH O.N.BHARGAVA ravi S.CHAUBEY Naval kishore Department of Geology (CAS) Panjab University Chandigarh 160014 India 103 Sector-7 Panchkula (Haryana) 134109 India

The Lower Cambrian Nagaur Sandstone（Marwar Supergroup） has yielded trace fossils Treptichnus, Cruziana, serially repeated Rusophycus, Diplichnites, Monomorphichnus, Bergaueria,arthropod swimming traces and leap frogging marks of Cruziana ichnofacies. This ichnofossils assemblage is dominantly preserved in fine to medium grained red sandstone beds of the Mohra Member（Nagaur Sandstone）. The presence of graded rip-up clasts, current ripples, dune crossstratification with mud drapes and tidal bundles indicates a subtidal paleoenvironment for the deposition of Nagaur Sandstone Formation, which is corroborated by the Cruziana ichnofacies trace fossil assemblage.

关键词： Nagaur Sandstone Mohra Member trace fossils Cruziana ichnofacies subtidal paleoenvironment

Demographic characteristics of patients who underwent anterior cruciate ligament reconstruction at a tertiary care hospital in India

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World Journal of Clinical Cases 2023年第15期11卷 3464-3470页

作者： sai Krishna Mlv Asjad Mahmood Pulak Vatsya Siva Srivastava Garika ravi Mittal Manoj Nagar Department of Orthopaedics All India Institute of Medical SciencesNew Delhi 110029India Department of Orthopaedics All India Institute of Medical SciencesBhopal 462020India

BACKGROUND Anterior cruciate ligament(ACL)tears are common sports-related *** incidence is not the same either for all the sports or for the same sport across various *** information is maintained by many sports leagues in their ***,very few nationwide registries exist for such *** study is carried out to know the demographic characteristics of patients who underwent ACL reconstruction at our hospital in *** To know the demographic characteristics of patients who underwent ACL reconstruction at a tertiary care hospital in *** All the patients who underwent ACL reconstruction from January 2020 to December 2021 were retrospectively *** with multi-ligament injuries or a history of previous knee surgery were *** patients’history was obtained from the hospital records,they were interviewed telephonically,and online questionnaires were *** demographic data was analyzed and compared to the existing *** A total of 124 patients were operated on for ACL reconstruction during this *** mean age of the patients was 27.97 *** hundred and thirteen patients(91.1%)were male and 11(8.9%)were *** majority of the patients(47.6%)sustained this injury by road traffic accidents(RTA)followed by sportsrelated injuries(39.5%).The commonest presenting complaint was giving way of the knee in 118 patients(95.2%).The mean duration from the injury to the first hospital visit among the patients was 290.1 *** mean duration from the injury to surgery was 421.8 *** ACL patients’demography is different in developing nations as compared to the developed *** are the leading cause of ACL injuries and are followed by recreational sports as a *** is delayed access to healthcare leading to delayed diagnosis as well as even greater time to ***,in turn,leads to poorer prognosis and longer *** registries for developing nations are th

关键词： Anterior cruciate ligament Sports injury Demography Epidemiology Knee

Urine microscopy and neutrophilelymphocyte ratio are early predictors of acute kidney injury in patients with urinary tract infection

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Asian Journal of Urology 2021年第2期8卷 220-226页

作者： Sreerag Kana Rajesh Nachiappa Ganesh Deepanjali Surendran Rajendra G.Kulkarni ravi kishore Bobbili Jose Olickal Jeby Department of Pathology Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherryIndia Department of Medicine Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherryIndia Department of Immunohaematology and Transfusion Medicine Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherryIndia Department of Preventive and Social Medicine Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherryIndia

Objective:Urinary tract infection(UTI)is a common cause of morbidity and hospitalisation in the population *** UTI is indolent and causes subclinical acute kidney injury(AKI)resulting in preventable cause of scarring of renal *** explored urinary and serum levels of kidney injury molecule-1(KIM-1),haematological parameters and quantitative urine microscopy parameters to predict kidney ***:Neutrophilelymphocyte ratio(NLR)is obtained by dividing absolute neutrophil count with absolute lymphocyte *** urine sediment microscopy was performed and correlated with clinical,biochemical and haematological findings to predict AKI in patients with *** ELISA was performed for serum and urine levels of *** two adult patients with UTI were enrolled,45 of whom had AKI while 27 were in the non-AKI ***:NLR(p=0.005)and renal tubular epithelial cell-granular cast score in quantitative urine microscopy(p=0.008)are strong predictors of AKI in patients with UTI while rest of quantitative urine microscopy parameters and serum and urinary levels of KIM-1 molecule were not found to be useful in prediction of ***:NLR in haemogram is a novel and useful biomarker for predicting AKI in patients with UTI.

关键词： Acute kidney injury kidney injury molecule-1 Neutrophil elymphocyte ratio Quantitative urine microscopy score Urinary tract infection

Prevalence of advanced liver fibrosis and steatosis in type-2 diabetics with normal transaminases:A prospective cohort study

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World Journal of Gastroenterology 2021年第6期27卷 523-533页

作者： Jasbir Makker Hassan Tariq kishore Kumar Madhavi ravi Danial Haris Shaikh Vivien Leung Umar Hayat Muhammad T Hassan Harish Patel Suresh Nayudu Sridhar Chilimuri Division of Gastroenterology Department of MedicineBronxCare Health SystemBronxNY 10457United States KU School of Medicine-Wichita University of KansasWichitaKS 67214United States Department of Medicine BronxCare Health SystemBronxNY 10457United States

BACKGROUND Nonalcoholic fatty liver disease(NAFLD)and type-2 diabetes mellitus(T2DM)have an intricate bidirectional *** with T2DM,not only have a higher prevalence of non-alcoholic steatosis,but also carry a higher risk of progression to nonalcoholic *** still differ in their recommendations of screening for NAFLD among patients with *** To study the prevalence of NAFLD and advanced fibrosis among our patient population with *** During the study period(November 2018 to January 2020),59 adult patients with T2DM and 26 non-diabetic control group individuals were recruited *** with known significant liver disease and alcohol use were *** data and lab parameters were *** elastography was performed in all *** In the study group comprised of patients with T2DM and normal alanine aminotransferase levels(mean 17.8±7 U/L),81%had hepatic steatosis as diagnosed by *** hepatic fibrosis(stage F3 or F4)was present in 12%of patients with T2DM as compared to none in the control *** with T2DM also had higher number of individuals with grade 3 steatosis[45.8%vs 11.5%,(P<0.00001)and metabolic syndrome(84.7%vs 11.5%,P<0.00001)].CONCLUSION A significant number of patients with T2DM,despite having normal transaminase levels,have NAFLD,grade 3 steatosis and advanced hepatic fibrosis as measured by liver elastography.

关键词： Advanced liver fibrosis Diabetes Steatosis Normal transaminases Fatty liver disease Metabolic syndrome

Contemporary nationwide trends in major adverse cardiovascular events in young cannabis users without concomitant tobacco,alcohol,cocaine use

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World Journal of Cardiology 2024年第9期16卷 512-521页

作者： Rupak Desai Priyatham Gurram Adil S Mohammed Rishabh B Salian Shanmukh sai Pavan Lingamsetty Sandeep Guntuku ravi Venkata sai Krishna Medarametla Rawnak Jahan Zainab Muslehuddin Paritharsh Ghantasala Department of Outcomes Research Independent ResearcherAtlantaGA 30033United States Department of Internal Medicine Central Michigan University College of MedicineSaginawMI 48602United States Department of Medicine Kasturba Medical CollegeMangalore 575001India Department of Medicine Mamata Medical CollegeKhammam 507002India Department of Medicine Bangladesh Medical CollegeDhaka 110015Bangladesh Department of Internal Medicine Wayne State UniversitySinai Grace HospitalDetroit Medical CenterDetroitMI 48201United States

BACKGROUND Cannabis use has increased among young individuals in recent *** dependent cannabis use disorder(CUD)has been associated with various cardiac events,its effects on young adults without concurrent substance use remain *** To examine trends in hospitalizations for major adverse cardiac and cerebrovascular events(MACCE)in this *** used the National Inpatient Sample(2016-2019)to identify hospitalized young individuals(18-44 years),excluding those with concurrent substance usage(tobacco,alcohol,and cocaine).They were divided into CUD+and CUD-.Using International Classification of Diseases-10 codes,we examined the trends in MACCE hospitalizations,including all-cause mortality(ACM),acute myocardial infarction(AMI),cardiac arrest(CA),and acuteischemic stroke(AIS).RESULTSOf 27.4 million hospitalizations among young adults without concurrent substance abuse,4.2%(1.1 million)hadco-existent *** CUD+group,hospitalization rates for MACCE(1.71%vs 1.35%),AMI(0.86%vs 0.54%),CA(0.27%vs 0.24%),and AIS(0.49%vs 0.35%)were higher than in CUD-group(P<0.001).However,rate of ACMhospitalizations was lower in CUD+group(0.30%vs 0.44%).From 2016 to 2019,CUD+group experienced arelative rise of 5%in MACCE and 20%in AMI hospitalizations,compared to 22%and 36%increases in CUDgroup(P<0.05).The CUD+group had a 13%relative decrease in ACM hospitalizations,compared to a 10%relative rise in CUD-group(P<0.05).However,when adjusted for confounders,MACCE odds among CUD+cohort remain comparable between 2016 and *** CUD+group had higher rates of MACCE,but the rising trends were more apparent in the CUD-group ***,the CUD+group had lower ACM rates than the CUD-group.

关键词： Cannabis Major adverse cardiac and cerebrovascular events Myocardial infarction Cardiac arrest Stroke Allcause mortality Young adults Trends

Petrography of Bethampudi Anorthosites Layered Complex from the Khammam Schist Belt, Telangana, India

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Open Journal of Geology 2016年第11期6卷 1434-1456页

作者： Thallapalli Brahmaiah Chinthala ravi Kandukuri sai Krishna Gugulothu Papanna Katta Satya sai Prasad Department of Geology Sri Venkateswara University Tirupathi India University PG College Kakatiya University Jangoan India Department of Geology Kakatiya University Warangal India

The Bethampudi layered anorthosite complex at the border zone of Archaean supracrustal rocks of Khammam district, Eastern Ghats shows normal stratification predominantly in the form of rhythmic layering and often exhibits of zebra layering. Graded bedding and cumulate structures are also noticed. The rocks of the study area are classified based on petrography into anorthositic rocks, gabbroic rocks and ultramafic rocks and amphibolites. The field relations and major element composition suggest that these anorthosite rocks are of calc-alkaline in nature and petrogenitically related to the gabbroic rocks by the fractional crystallization at ℃.

关键词： Bethampudi Layered Anorthosite Complex Petrographic Classification Calc Alkaline Nature Fractional Crystallization of Gabbroic Rocks

Predicting the presence of adenomatous polyps during colonoscopy with National Cancer Institute Colorectal Cancer Risk-Assessment Tool

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World Journal of Gastroenterology 2018年第34期24卷 3919-3926页

作者： Hassan Tariq Muhammad Umar Kamal Harish Patel ravi Patel Muhammad Ameen Shehi Elona Maram Khalifa Sara Azam Aiyi Zhang kishore Kumar Ahmed Baiomi Danial Shaikh Jasbir Makker Division of Gastroenterology Department of Medicine BronxC are Health system Department of Medicine Bronx Care Health system

AIM To evaluate the National Cancer Institute(NCI)Colorectal Cancer(CRC)Risk Assessment Tool as a predictor for the presence of adenomatous polyps(AP) found during screening or surveillance *** This is a retrospective single center observational *** collected data of adenomatous polyps in each colonoscopy and then evaluated the lifetime CRC *** calculated the AP prevalence across risk score quintiles,odds ratios of the prevalence of AP across risk score quintiles,area under curves(AUCs)and Youden’s indexes to assess the optimal risk score cut off value for AP prevalence *** The prevalence of AP gradually increased throughout the five risk score quintiles:i.e.,27.63%in the first and 51.35%in the fifth *** odd ratios of AP prevalence in the fifth quintile compared to the first and second quintile were 2.76[confidence interval(CI):1.71-4.47]and 2.09(CI:1.32-3.30).The AUC for all patients was 0.62(CI:0.58-0.66).Youden’s Index indicated the optimal risk score cutoff value discriminating AP prevalence status was *** Patients with the higher NCI risk score have higher risk of AP and subsequent CRC;therefore,measures to increase the effectiveness of CRC detection in these patients include longer withdrawal time,early surveillance colonoscopy,and choosing flexible colonoscopy over other CRC screening modalities.

关键词： National Cancer Institute Colorectal Cancer Risk-Assessment Tool Colorectal cancer Predictors of colorectal cancer Adenomatous polyps Colonoscopy