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Measurement and validation of tsunami Eigen values for the various water wave conditions

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Journal of Ocean Engineering and Science 2020年第1期5卷 41-54页

作者： Sudhir kumar Chaturvedi Ugur Guven Pankaj kumar srivastava Department of Aerospace Engineering University of Petroleum and Energy StudiesDehradun 248007India Department of International Affairs University of Petroleum and Energy StudiesDehradun 248007India Department of Petroleum Engineering&Earth Sciences University of Petroleum and Energy StudiesDehradun 248007India

This paper proposes the mathematical model to investigate how to compute and analyze the tsunami wave parameters and the retrieval of its early warning using remote sensing technique to improve the detection *** different methods available for the evaluation of the tsunami detection systems are also *** research work is to compute and analyze the tsunami wave parameters such as Eigen functions in deep,intermediate and shallow water *** computational and algorithmic analysis of tsunami wave parameters are achieved in three steps:the first step is to calculate the earthquake fault parameters such as length,width,area and displacement from the epicenter,which corresponds to the effect of its variation with respect to the earthquake *** variation of each fault parameters have been measured and recorded out over the certain moment of magnitudes(M).This shows smaller values as compared to the earthquake magnitude M 9.5 at which all the parameters shows very large *** second step involves the measurements of water wave angular frequency in deep,intermediate and shallower region of *** values of angular frequencies in deep water shows the lesser response as compared to other two water conditions because,in deep water the angular velocity of water particles travels with the lesser speed as compared to the shallower region as per Airy’s wave *** simulation results show the angular velocity in Deep Ocean is very less,moderate in the intermediate water and very high on the coastal *** indicates the higher impact on coastal *** third step involves the simulation study of measurement of tsunami Eigen functions such as orbital velocity,acceleration,wave potential in deep,intermediate and shallower water *** simulation result shows the resultant orbital velocity and accelerations in deep,intermediate and shallow water regions provides the similar response as angular velocity due to same proportion of the

关键词： Tsunami Eigen functions Monitoring Detection.

Role of MgF2 addition on high energy ball milled kalsilite:Implementation as dental porcelain with low temperature frit

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Journal of Advanced Ceramics 2014年第4期3卷 332-338页

作者： Pattem Hemanth kumar Abhinav srivastava Vijay kumar Nandini JAISWAL Pradeep kumar Vinay kumar SINGH Department of Ceramic Engineering Indian Institute of Technology(BHU)VaranasiIndia Department of Chemical Engineering Indian Institute of Technology(BHU)VaranasiIndia

Porcelain fused to metal(PFM)has received great attention over the last few years due to its importance in the ***(K_(2)O·Al_(2)O_(3)·SiO_(2))is a high thermal expansion porcelain,suitable for bonding to ***,kalsilite is a metastable phase which gets converted into crystalline leucite upon *** the current work feasibility of developing stable kalsilite phase,dispersion of MgF2 in it as an additive and using mechanochemical synthesis are *** fine dental material has been formulated by mixing prepared kalsilite with low temperature frit(LTF)in different *** crystalline phases evolved in fired powders are characterized by powder X-ray diffraction(XRD)*** with different ratio of LTF has been cold pressed and heat treated to examine its coefficient of thermal expansion(CTE),flexural strength,apparent porosity(AP),bulk density(BD)and *** indicate that MgF_(2) addition and high milling duration help in kalsilite *** also plays an important role in this stabilization,and at 1100℃single phase kalsilite formation is *** outcomes demonstrate that it is easily possible to synthesize a stable single phase kalsilite with desirable properties.

关键词： kalsilite porcelain fused to metal(PFM) dental ceramic mechanochemical synthesis thermal expansion X-ray diffraction(XRD)

Non-alcoholic Fatty Liver Disease:Growing Burden, Adverse Outcomes and Associations

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Journal of Clinical and Translational Hepatology 2020年第1期8卷 76-86页

作者： ramesh kumar Rajeev Nayan Priyadarshi Utpal Anand Department of Gastroenterology All India Institute of Medical SciencesPatnaIndia Department of Radiodiagnosis All India Institute of Medical SciencesPatnaIndia Department of Surgical Gastroenterology All India Institute of Medical SciencesPatnaIndia

Nonalcoholic fatty liver disease(NAFLD)is a systemic disor-der with a complex multifactorial pathogenesis and hetero-genous clinical ***,once believed to be an innocuous condition,has now become the most common cause of chronic liver disease in many countries *** is already highly prevalent in the general population,and owing to a rising incidence of obesity and diabetes mellitus,the incidence of NAFLD and its impact on global healthcare are expected to increase in the future.A subset of patients with NAFLD develops progressive liver disease lead-ing to cirrhosis,hepatocellular carcinoma,and liver *** has emerged as one of the leading causes of cirrhosis and hepatocellular carcinoma in recent ***,HCC can occur in NAFLD even in absence of *** with the general population,NAFLD increases the risk of liver-related,cardiovascular and all-cause *** is bidirectionally associated with metabolic *** increases the risk and contributes to aggravation of the pathophysiology of atherosclerosis,cardiovascular diseases,diabetes mellitus,and chronic kidney *** addition,NAFLD is linked to colorectal polyps,polycystic ovarian syndrome,osteoporosis,obstructive sleep apnea,stroke,and various extrahepatic *** resection of steatotic liver is associated with increased risk of liver failure and *** is an increasing trend of NAFLD-related cirrhosis requiring liver transplantation,and the recurrence of NAFLD in such patients is almost *** review discusses the growing burden of NAFLD,its outcomes,and adverse associations with various diseases.

关键词： NAFLD NASH Metabolic Outcome Association

In-Situ Hydrothermal Synthesis of Bi–Bi2O2CO3 Heterojunction Photocatalyst with Enhanced Visible Light Photocatalytic Activity

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Nano-Micro Letters 2017年第2期9卷 58-67页

作者： Prasenjit Kar Tuhin kumar Maji ramesh Nandi Peter Lemmens Samir kumar Pal Department of Chemical Biological and Macromolecular Sciences S.N.Bose National Centre for Basic SciencesBlock JDSector ⅢSaltLakeKolkata 700106India Institute for Condensed Matter Physics TU BraunschweigMendelssohnstraße 338106 BrunswickGermany Laboratory for Emerging Nanometrology TU BraunschweigBrunswickGermany

Bismuth containing nanomaterials recently received increasing attention with respect to environmental applications because of their low cost, high stability and nontoxicity. In this work, Bi–Bi_2O_2CO_3 heterojunctions were fabricated by in-situ decoration of Bi nanoparticles on Bi_2O_2CO_3 nanosheets via a simple hydrothermal synthesis approach. X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM) and high-resolution TEM(HRTEM) were used to confirm the morphology of the nanosheet-like heterostructure of the Bi–Bi_2O_2CO_3 composite. Detailed ultrafast electronic spectroscopy reveals that the in-situ decoration of Bi nanoparticles on Bi_2O_2CO_3 nanosheets exhibit a dramatically enhanced electron-hole pair separation rate, which results in an extraordinarily high photocatalytic activity for the degradation of a model organic dye, methylene blue(MB) under visible light illumination. Cycling experiments revealed a good photochemical stability of the Bi–Bi_2O_2CO_3 heterojunction under repeated irradiation. Photocurrent measurements further indicated that the heterojunction incredibly enhanced the charge generation and suppressed the charge recombination of photogenerated electron-hole pairs.

关键词： Bi nanoparticles Bi–Bi2O2CO3 nanosheets Heterojunction Hydrothermal method Charge separation Visible light photocatalytic activity

pharmacognostical study and establishment of quality parameters of aerial parts of Costus speciosus-a well known tropical folklore medicine

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Asian Pacific Journal of Tropical Biomedicine 2014年第6期4卷 486-491页

作者： Pradeep Singh Ratan Lal Khosa Shruti srivastava Garima Mishra Keshri Kishor Jha Sourabh srivastava Sangeeta ramesh kumar Verma Mohd Adil Tahseen Department of Pharmacognosy Teerthanker Mahaveer College of PharmacyTeerthanker Mahaveer University Department of Pharmacy Bharat Institute of TechnologyPartapur BypassDelhi Road MeerutUttar PradeshIndia

Objective:To evaluate the diagnostic pharmacognostical characters of Costus speciosus(aerial parts)along with their physico-chemical parameters and fluorosence ***:The pharmacognostical characters were determined in terms of macroscopy,microscopy,powder microscopy,leaf constant,fluorescence analysis and preliminary phytochemical ***:The findings of macroscopy revealed that leaves elliptic to oblong or oblong-lancoelate,thick,spirally arranged,with stem clasping sheaths up to 4 cm,flowers large,white,conelike terminal spikes,with bright red *** section of leaflet showed the presence of cuticularised epidermis with polygonal cells on adaxial surface and bluntly angled cells on abaxial surface of lamina,mesophyll cells differentiated in to single layered palisade cells on each surface and 2-3 layered spongy parenchyma,unicellular and uniseriate multicellular covering trichomes,paracytic stomata and vascular bundles surrounded by sclerenchymatous multicellular *** phytochemical screening exhibited the presence of various phytochemical groups like alkaloids,glycosides,steroids,phenolic ***,the leaf constants,powder microscopy and fluorescence characteristics indicated outstanding results from this investigation Conclusions:Various pharmacognostical and physico-chemical parameters have pivotal roles in identification,authentication and establishment of quality parameters of the species.

关键词： Costus speciosus Quality control Physico-chemical parameters Microscopy Fluorescence analysis

Chronic renal dysfunction in cirrhosis:A new frontier in hepatology

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World Journal of Gastroenterology 2021年第11期27卷 990-1005页

作者： ramesh kumar Rajeev Nayan Priyadarshi Utpal Anand Department of Gastroenterology All India Institute of Medical SciencesPatna 801507BiharIndia Department of Radiodiagnosis All India Institute of Medical SciencesPatna 801507BiharIndia Department of Surgical Gastroenterology All India Institute of Medical SciencesPatna 801507BiharIndia

Chronic kidney disease(CKD)in patients with liver cirrhosis has become a new frontier in *** recent years,a sharp increase in the diagnosis of CKD has been observed among patients with *** rising prevalence of risk factors,such as diabetes,hypertension and nonalcoholic fatty liver disease,appears to have contributed significantly to the high prevalence of ***,the diagnosis of CKD in cirrhosis is now based on a reduction in the estimated glomerular filtration rate of<60 mL/min over more than 3 *** definition has resulted in a better differentiation of CKD from acute kidney injury(AKI),leading to its greater *** has also been noted that a significant proportion of AKI transforms into CKD in patients with decompensated *** in cirrhosis can be structural CKD due to kidney injury or functional CKD secondary to circulatory and neurohormonal *** available literature on combined cirrhosis-CKD is extremely limited,as most attempts to assess renal dysfunction in cirrhosis have so far concentrated on *** to problems related to glomerular filtration rate estimation in cirrhosis,the absence of reliable biomarkers of CKD and technical difficulties in performing renal biopsy in advanced cirrhosis,CKD in cirrhosis can present many challenges for *** combined hepatorenal dysfunctions,fluid mobilization becomes problematic,and there may be difficulties with drug tolerance,hemodialysis and decision-making regarding the need for liver vs simultaneous liver and kidney *** paper offers a thorough overview of the increasingly known CKD in patients with cirrhosis,with clinical consequences and difficulties occurring in the diagnosis and treatment of such patients.

关键词： Acute kidney injury Cirrhosis Chronic kidney disease Renal failure Hepatorenal syndrome Renal function

Implementation of High-Q Embedded Band Pass Filter in Wireless Communication

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Intelligent Automation & Soft Computing 2023年第5期36卷 2191-2200页

作者： V.Satheesh kumar S.ramesh Department of Electronics and Communication Engineering T.J.S Engineering CollegeChennaiTamilNadu601206India Valliammai Engineering College ChennaiTamil Nadu603203India

At 12.8 MHz center frequency,the advanced miniaturized polymer-based planar high quality factor(Q)passive elements embedded bandpassﬁlter works in the *** most of the demands operate inside the spectrum,the wideband or high-speed operation necessary to enhance must be acquired in microwave frequency *** channel has a quiet,high-performance micro-ﬁlter with wideband *** and inductors are used in the high quality factor(Q)passive components,and related networks are incorporated in theﬁ*** layers are concatenated using Three-Dimensional Integrated Circuit(3D-IC)integration,parasitics are removed,and interconnection losses are negotiated using de-embedding methods.A wireless application-based Liquid Crystalline Polymer(LCP)viewpoint is employed as a substrate material in this *** polymer processes,their properties,and the incorporated high-Q Band Pass Filter *** suggestedﬁlter model is computed and manufactured utilizing the L-band frequency spectrum,decreasing total physical length by 31%while increasing bandwidth by 45%.

关键词： Bandpassﬁlter wireless communication frequency spectrum embedded technology

Delayed information induces oscillations in a dynamical model for infectious disease

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International Journal of Biomathematics 2019年第2期12卷 163-196页

作者： Anuj kumar Prashant K srivastava Anuradha Yadav School of Mathematics Thapar Institute of Engineering and Technology Patiala 147004 India Department of Mathematics Indian Institute of Technology Patna Patna 801103India

During disease outbreak,it has been observed that information about the disease prevalence induces the individuafs behavioral *** information is usually assumed to be generated by the density of infective individuals and active mass *** delay in reporting of these infective individuals may have its impact on generated ***,to study the impact of delay on information generation,and therefore on the disease dynamics,a delay differential equation model is proposed and *** dynamics of information with delay effect is also modeled by a separate rate *** analysis is performed and a unique infected equilibrium is obtained when the basic reproduction number(R0)is greater than one,whereas the disease free equilibrium always *** R0<1,the disease free equilibrium is found to be locally stable independent of delay *** unique infected equilibrium is found to be locally stable till delay reaches a threshold *** global stability of the unique infected equilibrium is also established under some parametric conditions by constructing a suitable Lyapunov *** occurrence of Hopf bifurcation is observed when the delay in information crosses the threshold ***,the direction and stability of bifurcating periodic solutions is ***,we observed the occurrence of Hopf-Hopf bifurcation at two different *** first delay threshold,the endemic equilibrium loses its st ability and produces periodic oscillations via Hopf *** further regains its stability at second delay threshold via another Hopf ***,the delay effect on information shows possibility of stability *** experiments are carried out to support the obtained analytical *** study infers that the disease will show persistent oscillations if there is a significant time lag in reporting of infective after the disease ***,the delay in dissemination of information shows rich and

关键词： Information behavioral response delay Hopf bifurcation Hopf-Hopf bifurcation

Structural,Wettability and Optical Investigation of Titanium Oxynitride Coatings:Effect of Various Sputtering Parameters

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Journal of Materials Science & Technology 2012年第6期28卷 512-523页

作者： Sushant K Rawal Amit kumar Chawla R.Jayaganthan ramesh Chandra Centre of Nanotechnology Indian Institute of Technology RoorkeeRoorkee-247667India Nano Science Laboratory Institute Instrumentation CentreIndian Institute of Technology RoorkeeRoorkee-247667India Department of Mechanical Engineering Charotar University of Science and TechnologyChanga 388421India Department of Physics University of Petroleum and Energy StudiesDehradun-48007India Department of Metallurgical and Materials Engineering Indian Institute of Technology RoorkeeRoorkee-247667India

The objective of the present work is to investigate the effect of various sputtering parameters such as nitrogen flow rate, deposition time and sputtering pressure on structural, wettability and optical properties of titanium oxynitride films deposited on glass substrate by reactive magnetron sputtering. The X-ray diffraction graphs of titanium oxynitride films show evolution of various textures of TiO=N and TiN phases with increasing nitrogen flow rate and deposition time, but an increase in sputtering pressure from 4.0 to 8.0 Pa results in decline of various textures observed for TiO=Ny and TiN phases. The stress and strain calculated by sin2~ method are compressive, which decrease with increasing nitrogen flow rate from 55 to I00 sccm （standard cubic centimeter per minute） and increase with increasing deposition time from 80 to I40 min due to atomic penning effect and increasing thickness of the deposited films. The titanium oxynitride films have contact angle values above 90 deg., indicating that films are hydrophobic. The maximum contact angle of I09.1 deg. is observed at deposition time of 140 min. This water repellent property can add value to potential protective, wear and corrosion resistant application of titanium oxynitride films. The band gap decreases from 1.98 to 1.83 eV as nitrogen flow rate is increased from 55 to 100 sccm; it decreases from 1.93 to 1.79 eV as deposition time is increased from 80 to 140 min as more nitrogen incorporation results in higher negative potential of valence band N2p orbital. But it increases from 2.26 to 2.34 eV for titanium oxynitride films as sputtering pressure increases from 4.0 to 8.0 Pa.

关键词： Titanium oxynitride Sputtering parameters Contact angle Optical properties