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Performance Improvement of Kenaf/Glass Polymer Hybrid Composites by Effective Application of Fish Scale Powder as Filler:A Novel Approach

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Journal of Harbin Institute of Technology(New Series) 2024年第3期31卷 80-96页

作者： Chandrakanta Mishra Deepak kumar Mohapatra Chitta Ranjan deo Chetana Tripathy Kiran kumar Ekka Department of Mechanical Engineering Veer Surendra Sai University of TechnologySambalpur 768018OdishaIndia

Modern technology for developing new items made from renewable resources is becoming more and more popular as a result of rising environmental ***,contemporary polymer composites have included the hybridization of natural fibers with synthetic ones,along with the inclusion of a variety of biowaste filler for developing sustainable *** this work,the kenaf/glass hybrid polyester composites are strengthened by the addition of fish scale(FS),which is taken from the fish􀆳s outermost layer of *** different stacked-order laminates,such as KKKK,KGKG,GKKG,KGGK,and GGGG,are fabricated by using the hand lay-up method with four different weight concentrations of filler content:0%,5%,10%,and 15%.Mechanical possessions such as tensile,flexural,impact strength and micro-hardness have been evaluated through experimentation in accordance with ASTM *** experimental findings revealed that,the tensile strength and micro-hardness value of KGKG laminates with 15wt% of FS filler are found to be maximum of 118.72 MPa and 17.82 HV respectively which are 39.67%and 26.11%greater than that of KGKG laminates without FS ***,the flexural and impact strength of same laminates with 10 wt% FS filler exhibited a maximum value of 142.77 MPa and 62.08 kJ/m^(2).In order to corroborate its applicability for structural and building materials in open environment,the dimensional stability of the composite has been studied through moisture absorption *** influences of FS filler loading on dimensional stability and resistance to moisture absorption capacity of laminates are also *** experimental results reflected that the addition of FS-filler has significantly improved the dimensional stability of the laminates in moist environment by reducing the moisture absorption *** further support the mode of failures,a fractography investigation of fractured surfaces was conducted.

关键词： fish scale fiber polyester hybrid composites mechanical properties

Erosive Wear Study of PPLSF/Glass Fiber Reinforced Hybrid Laminates

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Journal of Harbin Institute of Technology(New Series) 2024年第2期31卷 68-79页

作者： Chetana Tripathy Deepak kumar Mohapatra Chitta Ranjan deo Punyapriya Mishra Department of Mechanical Engineering Veer Surendra Sai University of Technology(VSSUT)Sambalpur 768018India

This work is focused to examine the erosive performance of hybrid Palmyra palm leaf stalk fiber(PPLSF)/glass polyester laminate against solid particle bombardment.A hand lay-up method was adopted for the fabricating four piles of five distinct laminates with different stacking order glass and PPLSF *** them,one group of pure PPLSF and pure E-glass laminates were *** hybrid laminates were exposed to high speed stream of solid sand particle at three distinct impact velocities(48,70 and 82 m/s)and four different angles of impingement(30°,45°,60°and 90°).The effect of particle velocity,angle of impingement and stacking order on both wear rate and efficiency were *** experimental assessment reveals a significant improvement in erosive wear resistance properties due to hybridization of PPLSF with ***,the laminates with PPLSF layer as skin and glass as core layer exhibited better erosive wear resistance properties than other types of ***,a maximum value of erosion at lower velocity(48 m/s)is also noticed at 45°impingement ***,at high velocity of impact 70 m/s and 82 m/s,the maximum rate of erosion has been shifted from 45°impact angle to 60°impact *** alternation of this semi-ductile character to semi-brittle character is evidenced by analyzing the experimental *** to justify the mode of erosion,the eroded surface samples were inspected by scanning electron microscope(SEM).

关键词： hybrid composites erosion wear void micro-hardness SEM

Erosion Wear Behaviour of Kenaf/Glass Hybrid Polymer Composites

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Journal of Harbin Institute of Technology(New Series) 2024年第1期31卷 78-89页

作者： Chandrakanta Mishra Deepak kumar Mohapatra Chitta Ranjan deo Punyapriya Mishra Kiran kumar Ekka Department of Mechanical Engineering Veer Surendra Sai University of TechnologySambalpur 768018India

The awareness amongst the researchers to develop an environment friendly sustainable material leads to explore new class of plant-based fiber for making composites. Hybridization of such plant-based fiber with inclusion of engineered fiber is one of the promising methods to not only enhanced the mechanical performance but also suppressed the drawbacks that associate with such plant-based fiber to some extent. A usual hand lay-up method was taken-up in this work to fabricate four layered of hybrid kenaf(K)/glass(G)polyester laminates with different stacking order such as KKKK,KGKG,KGGK,GKKG and GGGG. The erosive character of the laminates was examined under three distinct particle velocities(48m/s, 70m/s,82m/s)and four different impact angles(30°, 45°, 60°, 90°). All fabricated laminates exhibited a semiductile character at lower velocities(48m/s and70m/s)as peak wear rate was observed at45° impact angle. However,they showed a semi-brittle character at high velocity(82m/s)as maximum rate of erosion was noticed at60° impact angle. Again,the influence of stacking order of piles on erosion wear was also clearly noticed. Moreover,the semi-brittle/semi-ductile characterization was also evidenced in accordance to the range of erosion efficiencies. The micro-structures of worn surfaces were inspected thoroughly from the images of scanning electron microscope(SEM)to evident the mechanism of erosion.

关键词： hybrid composites erosion wear void micro⁃hardness

Sensitivity analysis of borehole thermal energy storage: examining key factors for system optimization

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Energy Storage and Saving 2024年第3期3卷 218-230页

作者： Piyush kumar Kumawat Haiyan Zhou Kevin Kitz John McLennan Kody Powell Milind deo Palash Panja Department of Chemical Engineering University of UtahSalt Lake CityUT 84112USA Energy&Geoscience Institute University of UtahSalt Lake CityUT 84108USA RESPEC Company LLC Rapid CitySD 57703USA Kitzworks LLC BoiseID 83717USA

Borehole thermal energy storage(BTES)systems have garnered significant attention owing to their efficacy in storing thermal energy for heating and cooling *** modeling is paramount for ensuring the precise design and operation of BTES *** study conducts a sensitivity analysis of BTES modeling by employing a comparative investigation of five distinct parameters on a wedge-shaped model,with implications extendable to a cylindrical *** parameters examined included two design factors(well spacing and grout thermal conductivity),two operational variables(charging and discharging rates),and one geological attribute(soil thermal conductivity).Finite element simulations were carried out for the sensitivity analysis to evaluate the round-trip efficiency,both on a per-cycle basis and cumulatively over three years of operation,serving as performance *** results showed varying degrees of sensitivity across different models to changes in these *** particular,the round-trip efficiency exhibited a greater sensitivity to changes in spacing and volumetric flow ***,this study underscores the importance of considering the impact of the soil and grout-material thermal conductivities on the BTES-system performance over *** optimized scenario is modelled and compared with the base case,over a comparative assessment based on a 10-year *** analysis revealed that,at the end of the 10-year period,the optimized BTES model achieved a cycle efficiency of 83.4%.This sensitivity analysis provides valuable insights into the merits and constraints of diverse BTES modeling methodologies,aiding in the selection of appropriate modeling tools for BTES system design and operation.

关键词： Borehole thermal energy storage(BTES) Outlet temperature Round-trip efficiency Heating and cooling modes Well spacing Grout thermal conductivity Charging and discharging rates Soil thermal conductivity

A clinical decision support system using rough set theory and machine learning for disease prediction

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Intelligent Medicine 2024年第3期4卷 200-208页

作者： Kamakhya Narain Singh Jibendu kumar Mantri Department of Computer Application Maharaja Sriram Chandra Bhanja Deo UniversityBaripadaIndia

Objective Technological advances have led to drastic changes in daily life,and particularly healthcare,while traditional diagnosis methods are being replaced by technology-oriented models and paper-based patient health-care records with digital *** the latest technology and data mining techniques,we aimed to develop an automated clinical decision support system(CDSS),to improve patient prognoses and healthcare *** proposed approach placed a strong emphasis on improvements that meet patient,parent,and physician *** developed a flexible framework to identify hepatitis,dermatological conditions,hepatic disease,and autism in adults and provide results to patients as *** novelty of this CDSS lies in its inte-gration of rough set theory(RST)and machine learning(ML)techniques to improve clinical decision-making accuracy and *** Data were collected through various web-based *** preprocessing techniques were applied to encode categorical features,conduct min-max scaling,and remove null and duplicate *** most prevalent feature in the class and standard deviation were used to fill missing categorical and continuous feature values,respectively.A rough set approach was applied as feature selection,to remove highly redundant and irrelevant ***,various ML techniques,including K nearest neighbors(KNN),linear support vector machine(LSVM),radial basis function support vector machine(RBF SVM),decision tree(DT),random forest(RF),and Naive Bayes(NB),were employed to analyze four publicly available benchmark medical datasets of different types from the UCI repository and *** model was implemented in Python,and various validity metrics,including precision,recall,F1-score,and root mean square error(RMSE),applied to measure its *** Features were selected using an RST approach and examined by RF analysis and important features of hepatitis,dermatology conditions,hepatic dis

关键词： Clinical decision support system Disease classification Machine learning classifier Medical data Recommendation Rough set

Effect of Pre-treatment of α-Ketoglutarate on Cyanide-induced Toxicity and Alterations in Various Physiological Variables in Rodents

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Biomedical and Environmental Sciences 2007年第1期20卷 56-63页

作者： RAJkumar TULSAWANI deo kumar R.BHATTACHARYA Division of Pharmacology and Toxicology Defence Research and Development Establishment Jhansi Road Gwalior 474 002 M.P. India

Objective To investigate the effects of pre-treatment of α-ketoglutarate （α-KG） on cyanide-induced lethality and changes in various physiological parameters in rodents. Methods The LD50 of potassium cyanide （KCN） given orally （po）, intraperitoneally （ip）, subcutaneously （sc） or intravenously （iv） was determined in male mice, in the presence or absence α-KG given po, ip or iv. α-KG was administered 10, 20 or 40 min prior to KCN at 0.50, 1.0 or 2.0 g/kg by po or ip route, and at 0.10, 0.20 or 0.40 g/kg by iv route. Protection index （PI） was calculated as the ratio of LD50 of KCN in the presence of α-KG （protected animals） and LD50 of KCN in the absence of α-KG （unprotected animals）. In a separate experiment, several physiological variables viz. mean arterial pressure （MAP）, heart rate （HR）, respiratory rate （RR）, neuromuscular transmission （NMT） and rectal temperature （RT） were measured in anesthetized female rats pre-treated （-10 rain） with po （2.0 g/kg） or iv （0.125 g/kg） α-KG and then administered sub-lethal （0.75 LD50） or lethal （2.0, 4.0 or 8.0 LD50） doses of KCN （po）. Results PI of 4.52, 6.40 and 7.60 at -10 min, 3.20, 5.40 and 6.40 at -20 min, and 1.40, 3.20 and 5.40 at -40 min of po administration with α-KG was observed for 0.50, 1.0 and 2.0 g/kg doses, respectively, against KCN given by po route. When KCN was given ip, a PI of 3.38, 4.79 and 5.70 was observed for 0.50, 1.0 and 2.0 g/kg α-KG given ip （-10 min）, respectively. A lower PI of 3.37, 2.83 and 2.38 was observed when KCN given sc was challenged by 2.0 g/kg α-KG given ip at -10, -20 or -40 min, respectively. Similarly, a PI of 3.37, 2.83 and 2.0 was noted when KCN given sc was antagonized by 2.0 g/kg α-KG given po at -10, -20 or -40 rain, respectively. No appreciable protection was observed when lower doses of α-KG （ip or po） challenged KCN given by sc route. Pre-treatment of iv or po administration of α-KG did not afford any protection against KCN given po or iv route. Oral treatment of 0.75 LD50 KCN

关键词： Cyanide Toxicity Physiological variables Protection α-Ketoglutarate

Age of the earliest transgressive event in the Krishna-Godavari Basin, India: evidence from dinoflagellate cysts and planktonic foraminifera biostratigraphy

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Journal of Palaeogeography 2020年第1期9卷 60-70页

作者： Ashish kumar Mishra Nallamuthu Malarkodi Arun deo Singh Dinesh Babu Vandana Prasad Birbal Sahni Institute of Palaeosciences LucknowIndia Department of Geology Jnanabharathi CampusBangalore UniversityBengaluru 560056India Department of Geology Banaras Hindu UniversityVaranasi 221005India Oil India Limited KakinadaIndia.

A combined biostratigraphic study of dinoflagellate cysts and foraminifera was carried out on Early Cretaceous subsurface well cutting sediments from well A(DNG)(2800–2746 m depth)from the Krishna-Godavari Basin,*** last appearance datum of marker species of dinoflagellate cysts and planktonic foraminifera was considered for the construction of the biostratigraphic *** study shows dominance of Early Cretaceous marker dinoflagellate cysts Cassiculosphaeridia magna,Cribroperidinium perforans,Hystrichodinium voigtii,Kleithriasphaeridium eoinodes,and planktonic foraminifera Hedbergella aptiana,Hedbergella mitra,Hedbergella praelippa,Hedbergella tardita,Microhedbergella miniglobularis and Hedbergella mitra *** addition to this,the dinoflagellate cyst data were compared with the dinoflagellate biozones of Austral and Tethyan *** on earlier micropalaeontological records from the Krishna-Godavari Basin and the present study,a latest Barremian-early Aptian age has been determined for the earliest marine transgression in the Krishna-Godavari *** early marine incursion during late Barremian-earliest Aptian in the Krishna-Godavari Basin compared to Albian age in Cauvery Basin suggests the opening of east coast from north to south.

关键词： Biostratigraphy Krishna-Godavari Basin Palaeoenvironment

Sorghum germplasm from West and Gentral Africa maintained in the ICRISAT genebank: Status,gaps,and diversity

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The Crop Journal 2017年第6期5卷 518-532页

作者： Hari deo Upadhyaya Kothapally Narsimha Reddy Mani Vetriventhan Mohammed Irshad Ahmed Gumma Murali Krishna Mulinti Thimma Reddy Shailesh kumar Singh Genebank International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Patancheru 502324 Telangana India Department of Agronomy Kansas State University Manhattan KS 66506 USA The UWA Institute of Agriculture The University of Western Australia Crawley WA 6009 Australia Remote Sensing and GIS Unit International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Patancheru 502324Telangana India

The genebank at ICRISAT maintains 8020 accessions of sorghum from 16 West and Central African countries. Geographical gaps and diversity were assessed in the collection. Using the passport data of 3991 accessions for which georeferenced data were available, a total of386 districts(gaps) located in 11 West and Central African countries were identified as geographical gaps. Burkina Faso with 140 and Nigeria with 118 districts were identified as countries with major geographical gaps. The collection of 43 accessions of wild species represented only three species belonging to Sorghum bicolor ssp. drummondii and ***, S. hevisonii, and S. macrochaeta, highlighting the need for collection missions aimed exclusively at enriching the collection of wild relatives. Accessions having characterization data(7630) were used to assess diversity. The first three principal components contributed to >60% of variation. Maximum diversity was observed in the collection from Nigeria for both qualitative and quantitative traits. Mean values indicated significant differences between basic and intermediate races for the traits studied. Among the races, accessions of guinea-caudatum for qualitative traits and those of caudatum for quantitative traits were highly diverse. The low intensity of the sorghum collection and the many geographical gaps in the collection underline the importance of launching collection missions to fill the gaps, particularly in regions of predominantly guinea *** of possible duplicate accessions is needed to identify duplicates in the collection. It is suggested that all passport information including georeferenced data of collection sites should be collected when samples are collected in gaps.

关键词： Collection Diversity Gaps Germplasm Landraces Sorghum

Microbiological Treatment of Effluent for Zinc Hydrometallurgical Plant

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Journal of Chemistry and Chemical Engineering 2014年第4期8卷 400-407页

作者： Ashish kumar Krishna deo Sharma Sunil Duggal Central R&D Laboratory Hindustan Zinc Limited Udaipur 313024 India

Sulfate reducing bacteria were isolated from the soil sample of Roaster-Acid unit of Debari Zinc Smelter of Hindustan Zinc Ltd., India and were adapted for effluent water of Zinc hydrometallurgy plant to sustain zinc concentration of about 500 ppm and iron concentration of about 160 ppm with high acidity （pH 〈 1.0）. Nutrient broth, whey, ethanol and sucrose were tested as carbon source for SRB （sulfate reducing bacteria） out of which whey was found as the best electron donor to expedite the rate of biological treatment with SRB. A two stage anaerobic bioreactor was developed with a treatment capacity of 30 L effluent water in 4 days. The concentration of heavy metals in the treated water was within the permissible limits. The suggested methodology generates no solid waste, is environment friendly and may be commercially implemented for treatment of zinc plant effluent.

关键词： Sulfate reducing bacteria anaerobic treatment isolation hydrometallurgy effluent.