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Journal of Materials Science & Technology 2023年第2期133卷 154-164页

作者： Seung-Yong Lee sita chettri Ritupan Sarmah Chikako Takushima Jun-ichi Hamada Nobuo Nakada Department of Materials Science and Engineering Tokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohama-shiKanagawa-ken 226-8503Japan Department of Physics Tezpur UniversityNappamTezpur 784028India Research and Development Center Nippon Steel Stainless Steel CorporationHikari 743-8550Japan

In order to further understand high-temperature deformation behavior and its-related mechanical prop-erties,the Portevin-Le Chatelier(PLC)effect in an Fe-19Cr-13Ni-0.2C austenitic stainless steel was in-vestigated using high-temperature digital image correlation(DIC)*** the tensile testing at temperatures from 473 to 623 K,different types of serrated flow appeared even at a constant applied strain rate,and the type transition took place dynamically in a certain order with deformation *** analysis revealed that the dynamic type transition of the serrated flow obeys the PLC band propagation behavior,and that the transition of the PLC band propagation behavior could be attributed to the PLC band nucleation *** modeling also proved that the nucleation manner of PLC band nu-cleation is determined by the spatial-temporal coupling effect.

关键词： Dynamic strain aging(DSA) Austenitic stainless steel(γ-STS) Portevin-Le Chatelier(PLC)effect Digital image correlation(DIC) Local strain distribution

Crimean-Congo hemorrhagic fever:Pathogenesis,transmission and public health challenges

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World Journal of Virology 2025年第1期14卷 63-72页

作者： sita Kumari Karanam Kandra Nagvishnu Praveen Kumar Uppala Sandhya Edhi Srinivasa Rao Varri Department of Pharmaceutical Biotechnology Maharajah’s College of PharmacyVizianagaram 535002Andhra PradeshIndia Department of Pharmacology Santhiram Medical College and General HospitalNandyal 518501Andhra PradeshIndia Department of Pharmacology Santhiram Medical College and General HospitalNandyal 518501Andhra PradeshIndia Department of Pharmaceutical AnalysisMaharajah's College of PharmacyVizianagaram 535002Andhra PradeshIndia

The dangerous Crimean-Congo hemorrhagic fever virus(CCHFV),an encapsulated negative-sense RNA virus of the family Nairoviridae,is transmitted from person to person via *** a case fatality rate between 10%to 40%,the most common ways that the disease may spread to humans are via tick bites or coming into touch with infected animals'blood or ***,the transfer of bodily fluids between individuals is another potential route of *** is a wide range of symptoms experienced by patients throughout each stage,from myalgia and fever to extreme bruising and excess *** management measures include minimising the spread of ticks from one species to another and from people to animals via the use of protective clothing,repellents,and proper animal *** order to prevent the spread of illness,healthcare workers must adhere to stringent *** the lack of an authorised vaccine,the main components of treatment now consist of preventative measures and supportive care,which may include the antiviral medicine *** still don't know very much about the virus's mechanisms,even though advances in molecular virology and animal models have improved our understanding of the pathogenesis of CCHFV.A critical need for vaccination that is both safe and effective,as well as for quick diagnosis and efficient treatments to lessen the disease's impact in areas where it is most *** steps towards lowering Crimean-Congo hemorrhagic fever mortality and morbidity rates were to anticipatethe future availability of immunoglobulin products.

关键词： Crimean-congo haemorrhagic fever Tick-borne illness Immunoglobulins Viral hemorrhagic fever Antiviral therapy

Liutex core line and POD analysis on hairpin vortex formation in natural flow transition

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Journal of Hydrodynamics 2020年第6期32卷 1109-1121页

作者： sita Charkrit Pushpa Shrestha Chaoqun Liu Department of Mathematics Maejo UniversityChiang MaiThailand Department of Mathematics University of Texas at ArlingtonArlingtonTexas76019USA

In this study,the new method of the vortex core line based on Liutex definition,also known as Liutex core line,is applied to support the hypothesis that the vortex ring is not a part of theΛ-vortex and the formation of the ring-like vortex is formed separately from theΛ-*** proper orthogonal decomposition(POD)is also applied to analyze the Kelvin-VHelmholtz(K-H)instability happening in hairpin ring areas of the flow transition on the flat plate to understand the mechanism of the ring-like vortex *** new vortex identification method named modified Liutex-Omega method is efficiently used to visualize and observe the shapes of vortex structures in *** streamwise vortex structure characteristics can be found in POD mode one as the mean *** other POD modes are in stremwise and spanwise structures and have the fluctuation motions,which are induced by K-H ***,the result shows that POD modes are in pairs and share the same characteristics such as amplitudes,mode shapes,and time *** vortex core and POD results confirm that theΛ-vortex is not self-deformed to a hairpin vortex,but the hairpin vortex is formed by the K-H instability during the development of Lambda vortex to hairpin vortex in the boundary layer flow transition.

关键词： Liutex vector Liutex core line proper orthogonal decomposition(POD)analysis K-H instability Lambda vortex Hairpin vort

Mathematical foundation of turbulence generation-From symmetric to asymmetric Liutex

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Journal of Hydrodynamics 2019年第3期31卷 632-636页

作者： Jian-ming Liu Yue Deng Yi-sheng Gao sita Charkrit Chaoqun Liu School of Mathematics and Statistics Jiangsu Normal University Xuzhou 221116 China Department of Mathematics University of Texas at Arlington Arlington 76019 Texas USA Department of Physics University of Texas at Arlington Arlington 76019 Texas USA

Vortices have been regarded as the building blocks and muscles of turbulence for a long time. To better describe and analyze vortices or vortical structures, recently a new physical quantity called Liutex (previously named Rortex) is introduced to present the rigid rotation part of fluid motion (Liu et al. 2018). Since turbulence is closely related to the vortex, it can be postulated that there exists no turbulence without Liutex. According to direct numerical simulations (DNS) and experiments, forest of hairpin vortices has been found in transitional and low Reynolds number turbulent flows, while one-leg vortices are predominant in full developed turbulent flows. This paper demonstrates that the hairpin vortex is unstable. The hairpin vortex will be weakened or lose one leg by the shear and Liutex interaction, based on the Liutex definition and mathematical analysis without any physical assumptions. The asymmetry of the vortex is caused by the interaction of symmetric shear and symmetric Liutex since the smaller element of a pair of vorticity elements determines the rotational strength. For a 2-D fluid rotation, if a disturbance shear effects the larger element, the rotation strength will not be changed, but if the disturbance shear effects the smaller element, the rotation strength will be immediately changed due to the definition of the Liutex strength. For a rigid rotation, if the shearing part of the vorticity and Liutex present the same directions, e.g., clockwise, the Liutex strength will not be changed. If the shearing part of the vorticity and Liutex present different directions, e.g., one clockwise and another counterclockwise, the Liutex strength will be ***, the hairpin vortex could lose the symmetry and even deform to a one-leg vortex. The one-leg vortex cannot keep balance, and the chaotic motion and flow fluctuation are doomed. This is considered as the mathematical foundation of turbulence formation. The DNS results of boundary laye

关键词： Turbulence generation mathematical principle Liutex/Rortex asymmetry

Forensic Science and its Limitations in Rape and Murder Cases in India

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Journal of Forensic Science and Medicine 2023年第1期9卷 91-97页

作者： J Lakshmi Charan K sita Manikyam Dr.B.R.Ambedkar College of Law Andhra UniversityVisakhapatnamAndhra PradeshIndia

Forensic science plays a significant role in crime scene analysis and other evidence collection(such as clothes,cigarette butts,blood,semen,hair,etc.,)to scientifically establish the accused’s *** rape and murder cases,DNA tests confirm the victim’s *** provides certain evidence that is helpful in the speedy investigation and conclusion of a ***,it is not a foolproof science and it has certain ***,the first responders,such as the Crime Laboratory Ultimate Evidence System team and the forensic experts,must keep these limitations in mind during sample collection and examination,otherwise,it may lead to incorrect *** incorrect results may be obtained due to insufficient sample quantity,improper collection methods,or delay in an *** is highly recommended to implement standard operating procedure guidelines,failing which the admissibility of such forensic evidence to prove beyond all reasonable doubts is at ***,the court shall acquit the accused giving him the benefit of *** article focuses on the applicability and limitations of forensic science in the Indian Criminal Justice System and the need to adopt due protocols to yield viable results.

关键词： Crime scene forensic science Indian criminal justice system rape standard operating procedure

Magnetic separation studies for a low grade siliceous iron ore sample

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International Journal of Mining Science and Technology 2013年第1期23卷 1-5页

作者： Dwari Ranjan Kumar Rao Danda Srinivas Reddy Palli sita Ram CSIR-Institute of Minerals and Materials Technology Council of Scientific and Industrial Research Bhubaneswar 751 013 India

Investigations were carried out, on a low grade siliceous iron ore sample by magnetic separation, to establish its amenability for physical beneficiation. Mineralogical studies revealed that the sample consists of magnetite, hematite and goethite as major opaque oxide minerals where as silicates as well as carbonates form the gangue minerals in the sample. Processes involving combination of classification, dry magnetic separation and wet magnetic separation were carried out to upgrade the low grade siliceous iron ore sample to make it suitable as a marketable product. The sample was first ground and each closed size sieve fractions were subjected to dry magnetic separation and it was observed that limited upgradation is possible. The ground sample was subjected to different finer sizes and separated by wet low intensity magnetic separator. It was possible to obtain a magnetic concentrate of 67% Fe by recovering 90% of iron values at below 200 lm size.

关键词： Iron ore Magnetite Characterization Dry and wet magnetic separation

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Rock excavation using surface miners: An overview of some design and operational aspects

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International Journal of Mining Science and Technology 2013年第1期23卷 33-40页

作者： Prakash Amar Murthy Vemavarapu Mallika sita Ramachandra Singh Kalendra Bahadur Central Institute of Mining & Fuel Research Dhanbad 826015 India Indian School of Mines Dhanbad 826004 India

Surface miner, a continuous mining machine, is being manufactured in India and abroad owing to enhanced demand of production in various mining industries like coal, limestone, gypsum, bauxite etc. Different types of surface miners are manufactured today based on cutting drum placement and design specifications. Selective mining without drilling and blasting, high production and small size products are some of the prominent attractive features obtained with these moving marvels. This machine can be used with good efficiency in soft to medium hard rock (100-120 MPa). This paper synthesizes the different applications, equipment models, features offered, operating methods, cutting performance assessment models as well as typical production performance of surface miner in coal and limestone mines of India. Engine hour metre reading, diesel and pick consumptions are linearly influenced by production. The emphasis for future research is also brought out.

关键词： Surface miner Cutting performance Compressive strength Operating methods

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The use of metal hydrides in fuel cell applications

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Progress in Natural Science:Materials International 2017年第1期27卷 3-20页

作者： Mykhaylo V.Lototskyy Ivan Tolj Lydia Pickering Cordellia sita Frano Barbir Volodymyr Yartys HySA Systems Competence Centre South African Institute for Advanced Materials Chemistry (SAIAMC) University of the Western Cape University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Department of Thermodynamics and Heat Engines Institute for Energy Technology Kjeller

This paper reviews state-of-the-art developments in hydrogen energy systems which integrate fuel cells with metal hydride-based hydrogen storage. The 187 reference papers included in this review provide an overview of all major publications in the field, as well as recent work by several of the authors of the review. The review contains four parts. The first part gives an overview of the existing types of fuel cells and outlines the potential of using metal hydride stores as a source of hydrogen fuel. The second part of the review considers the suitability and optimisation of different metal hydrides based on their energy efficient thermal integration with fuel *** performances of metal hydrides are considered from the viewpoint of the reversible heat driven interaction of the metal hydrides with gaseous H;. Efficiencies of hydrogen and heat exchange in hydrogen stores to control H;charge/discharge flow rates are the focus of the third section of the review and are considered together with metal hydride – fuel cell system integration issues and the corresponding engineering solutions. Finally, the last section of the review describes specific hydrogen-fuelled systems presented in the available reference data.

关键词： Fuel cells Hydrogen storage Metal hydrides Thermal integration System development

Direct injection HILIC-MS/MS analysis of darunavir in rat plasma applying supported liquid extraction

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Journal of Pharmaceutical Analysis 2015年第1期5卷 43-50页

作者： Bokka Ramesh Nemali Manjula Sistla Ramakrishna Potturi sita Devi Natural Products Chemistry Division Indian Institute of Chemical TechnologyTarnakaHyderabad 500607India Medicinal Chemistry & Pharmacology Division Indian Institute of Chemical TechnologyTarnakaHyderabad 500607India

A novel bioanalytical method was developed and validated for the quantitative determination of darunavir（DRV） in rat plasma by employing hydrophilic interaction chromatography and tandem mass spectrometry（HILIC-MS/MS） with supported liquid extraction（SLE）.lrbesartan（IRB） was used as an internal standard（IS）.The analyte in rat plasma（200 μL） was isolated through SLE using ethyl acetate as the eluting *** chromatographic separation was achieved on Luna-HILIC（250 mm × 4.6 mm,5 μm）column with a mobile phase of 0.1% of formic acid in water：acetonitrile（5：95,v/v）,at a constant flow rate of 1.0mL/*** MS/MS ion transitions for DRV（548.1→392.0） and IS（429.2→207.1） were monitored on an ion trap mass spectrometer,operating in the multiple reaction monitoring（MRM） *** lower limit of quantitation（LLOQ） was 0.2 ng/mL and quantitation range was 0.2-5000 ng/*** method was validated for its selectivity,sensitivity,carryover,linearity,precision,accuracy,recovery,matrix effect and *** method was successfully applied to pharmacokinetic study in rats.

关键词： Darunavir HILIC-MS/MS Rat plasma Supported liquid extraction

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Molecular characterization of basidiomycetes associated with the decayed mangrove tree Xylocarpus granatum in Thailand

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Fungal Diversity 2012年第5期56卷 145-156页

作者： Jariya Sakayaroj sita Preedanon Satinee Suetrong Anupong Klaysuban E.B.Gareth Jones Tsutomu Hattori National Center for Genetic Engineering and Biotechnology(BIOTEC) 113 Thailand Science ParkPhahonyothin RoadKhlong NuengKhlong LuangPathum Thani 12120Thailand Kansai Research Center Forestry and Forest Products Research InstituteNagai-Kyutaro 68MomoyamaFushimi-kuKyoto 612-0855Japan

This study reports the frequency of decay(stem/butt rot)of Xylocarpus granatum trees at Hat Khanom-Mu Ko Thale Tai National Park,Nakhonsithammarat province,and other locations in Thailand,and the identification of purported causal basidiomycetes based on morphological and molecular *** survey plots at Hat KhanomMu Ko Thale Tai National Park were established and the incidence of butt rot *** stem/butt rot incidence of *** trees varied from 40.9 to 94.4%with an average of 85.5%along all four *** in Plot 2 supported the heaviest incidence rate(94.4%),with the lowest rate in Plot 3(40.9%).Ninety-two basidiomes were collected,and 46 fungal strains(50%)isolated into axenic culture,the majority associated with tree roots(68.5%of all collections)with 31.5%from the tree *** results,based on LSU and ITS1,2,5.8 S rDNA analyses,confirmed that all samples belonged to the poroid genus Fulvifomes in the Hymenochaetaceae within the Hymenochaetales,*** 43 specimens sequenced grouped into three clades;one clade comprised specimens isolated from only the trunks and branches(14 strains),while the remainders were from roots(29 strains)and shown to be salt *** stem/butt rot strains formed unique phylotypes which did not group with other known Fulvifomes species.

关键词： Butt rot Fulvifomes Mangrove Phellinus Stem rot Xylocarpus