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A comprehensive review on residual stresses in turning

Advances in Manufacturing 2022年第2期10卷 287-312页

作者： Ammar H.Elsheikh S.Shanmugan T.Muthuramalingam amrit kumar thakur F.A.Essa Ahmed Mohamed Mahmoud Ibrahim Ahmed O.Mosleh Department of Production Engineering and Mechanical Design Facultyof EngineeringTanta UniversityTanta 31527Egypt Research Centre for Solar Energy Department of PhysicsKoneru Lakshmaiah Education FoundationVaddeswaramAndhra Pradesh 522502India Department of Mechatronics Engineering SRM Institute of Science and TechnologyChennai 603203India Department of Mechanical Engineering KPR Institute Engineering and TechnologyCoimbatoreTamilnaduIndia Department of Mechanical Engineering Faculty of EngineeringKafrelsheikh UniversityKafrelsheikh 33516Egypt Production Engineering and Mechanical Design Department Faculty of EngineeringMinia UniversityMinya 61519Egypt Shoubra Faculty of Engineering Benha UniversityBenhaEgypt

Residual stresses induced during turning processes can affect thequality and performance of machined products,depending on its direction and *** stresses can be highly detrimental as they can lead to creeping,fatigue,and stress corrosion *** final state of residual stresses in a workpiece depends on its material as well as the cutting-tool configuration such as tool geometry/coating,cooling and wear conditions,and process parameters including the cutting speed,depth-ofcut and ***,there have been disagreements in some literatures regarding influences of the abovementioned factors on residual stresses due to different cutting conditions,tool parameters and workpiece materials used in the specific *** review paper categorizes different methods in experimental,numerical and analytical approaches employed for determining induced residual stresses and their relationships with cutting conditions in a turning *** is presented for the effects of different cutting conditions and parameters on the final residual stresses state.

关键词： Residual stresses Machining Turning:Process parameters

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Comparison of rare earths doping(neodymium and samarium) on structural and magnetic properties of Ni-Zn-Bi nanoferrites

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Journal of Rare Earths 2024年第3期42卷 534-542,I0004页

作者： Shilpa Taneja Preeti thakur Dinesh kumar Yassine Slimani Atul thakur NanoLatticeX Amity University HaryanaGururam122413HaryanaIndia Nanotechnology Wing Innovative Science Research SocietyShimla177002India Centre for Nanotechnology Amity University HaryanaGururam122413HaryanaIndia Department of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia School of Electronics and Information Engineering Nanjing University of Information Science&TechnologyNanjing210044China

Excellent magnetic properties in ferrites are required for high-frequency applications and for wastewater treatment. Thus, the present study shows the comparison of magnetic and structural properties of Nd and Sm substituted Ni-Zn-Bi ferrites with the series Ni_(0.5)Zn_(0.5)Bi_(0.04)Nd_(x)Fe_(1.96-x)O_4(with step size 0.002)and Ni_(0.5)Zn_(0.5)Bi_(0.04)Sm_(x)Fe_(1.96-x)O_4(with step size 0.02) prepared using citrate precursor method. The impact of the substitution of rare earth ions(Nd and Sm) on magnetic properties of the synthesized samples is observed using a vibrating sample magnetometer(VSM). The saturation magnetization values enhance considerably from 52 to 58 emu/g for Nd^(3+)ions and 39 to 57 emu/g for Sm^(3+) ions, thus, making these materials magnetically hard. Further, the higher value of coercivity is also observed ranging from133 to 167 Oe for Nd^(3+)ions and 81 to 155 Oe for Sm^(3+) ions. The shape of hysteresis loops indicates a super paramagnetic and ferromagnetic behavior in the obtained samples. The squareness ratio value is<0.5, suggesting the uniaxial anisotropy of particles and hence, these ferrites are suitable for microwaveabsorbing and in permanent magnetic materials. The X-ray diffraction(XRD) pattern shows the formation of pure cubic crystallites, where, lattice parameters range from 0.840 to 0.839 nm and from 0.838to 0.839 nm for Nd^(3+)and Sm^(3+) ions substitution, respectively. The crystallite size ranges between 28.63to 29.89 nm and 18.33 to 26.23 nm, for substitution of Nd^(3+)and Sm^(3+) ions, respectively. Field emission scanning electron microscopy(FESEM) shows the formation of homogeneous grains, whereas, energy dispersive spectrometer(EDS) counts describe the purity of the samples. The Sm concentration x = 0.10has the maximum surface area with value of 42.6 m^(2)/g which proves to be having good data storage application due to high surface area. The zero-field cooled(ZFC) and field cooled(FC) data show that Nddoped Ni-Zn-Bi nano

关键词： Citrate precursor X-ray diffraction Vibrating sample magnetometer Coercivity Field emission scanning electron microscopy Rare earths

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A comprehensive review of rectangular duct solar air heaters featuring artificial roughness

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Clean Energy 2024年第5期8卷 186-217页

作者： Ravi Shankar Rajeev kumar Arun kumar Pandey Deep Singh thakur Department of Mechanical Engineering Rajkiya Engineering College BandaUttar Pradesh 210201India Department of Mechanical Engineering Institute of Engineering&TechnologyLucknowUttar Pradesh 226021India Department of Mechanical Engineering Bundelkhand Institute of Engineering&TechnologyJhansiUttar Pradesh 284128India

Solar air heaters(SAHs)are widely used solar thermal systems with applications in diverse ***,its effectiveness is re-strained by low convective heat transfer(HT)coefficients at the absorber plate,leading to inefficient HT,and the elevated temperature of the absorber plate causes significant heat losses,reducing thermal *** study addresses these challenges by introducing ribs or roughness on the absorber plate creating turbulence in the airflow,resulting in significant *** research inves-tigates various rib configurations,the influence of rib parameters,performance methods,and arrangements to evaluate their HT and friction *** these rib configurations,a comparative analysis is done on various factors such as the Nusselt number ratio,thermal enhancement factor,friction factor ratio,and thermal efficiency to optimize distinct roughness parameters and rib ar-rangement *** study also provides valuable recommendations from existing literature,offering insights into the effective design,prospects,and implementation of SAH systems.

关键词： solar air heater artificial roughness low heat transfer heating solar energy

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Nano/Micro-Structural Supramolecular Biopolymers: Innovative Networks with the Boundless Potential in Sustainable Agriculture

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Nano-Micro Letters 2024年第8期16卷 79-101页

作者： Roohallah Saberi Riseh Mohadeseh Hassanisaadi Masoumeh Vatankhah Rajender S.Varma Vijay kumar thakur Department of Plant Protection Faculty of AgricultureVali-e-Asr University of RafsanjanImam Khomeini SquareRafsanjan ***Iran Centre of Excellence for Research in Sustainable Chemistry Department of ChemistryFederal University of São CarlosSão CarlosSP 13565‑905Brazil Biorefining and Advanced Materials Research Center Scotland’s Rural Collage(SRUC)Edinburgh EH93JGUK

Sustainable agriculture plays a crucial role in meeting the growing global demand for food while minimizing adverse environmental impacts from the overuse of synthetic pesticides and conventional *** this context,renewable biopolymers being more sustainable offer a viable solution to improve agricultural sustainability and ***/micro-structural supramolecular biopolymers are among these innovative biopolymers that are much sought after for their unique *** biomaterials have complex hierarchical structures,great stability,adjustable mechanical strength,stimuli-responsiveness,and self-healing *** molecules may be added to their flexible structure,for enabling novel agricultural *** overview scrutinizes how nano/micro-structural supramolecular biopolymers may radically alter farming practices and solve lingering problems in agricultural sector namely improve agricultural production,soil health,and resource *** bioactive ingredient released from biopolymers allows the tailored administration of agrochemicals,bioactive agents,and biostimulators as they enhance nutrient absorption,moisture retention,and root ***/micro-structural supramolecular biopolymers may protect crops by appending antimicrobials and biosensing entities while their eco-friendliness supports sustainable *** their potential,further studies are warranted to understand and optimize their usage in agricultural *** effort seeks to bridge the knowledge gap by investigating their applications,challenges,and future prospects in the agricultural *** experimental investigations and theoretical modeling,this overview aims to provide valuable insights into the practical implementation and optimization of supramolecular biopolymers in sustainable agriculture,ultimately contributing to the development of innovative and eco-friendly solutions to enhance agricultural productivity while minimizing envir

关键词： Supramolecular Biopolymers Sustainable agriculture Nanotechnology

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Biorenewable materials for water remediation: The central role of cellulose in achieving sustainability

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Journal of Bioresources and Bioproducts 2024年第3期9卷 253-282页

作者： Kirti Mishra Samarjeet Singh Siwal Thandiwe Sithole Nirankar Singh Phil Hart Vijay kumar thakur Department of Chemistry M.M.Engineering CollegeMaharishi Markandeshwar(Deemed to be University)Haryana 133207India Department of Chemical Engineering University of JohannesburgDoornfontein 2088South Africa Biorefining and Advanced Materials Research Center Scotland’s Rural CollegeEdinburgh EH93JGUnited Kingdom Renewable and Sustainable Energy Research Centre Technology Innovation InstituteAbu Dhabi 9639United Arab Emirates School of Engineering University of Petroleum&Energy StudiesDehradun 248007India

As the population increases and manufacturing grows,greenhouse gas and other harmful emissions *** with chemicals such as dyes,pesticides,pharmaceuticals,oil,heavy metals or radionuclides,wastewater purification has become an urgent *** technologies exist that can remove these contaminants from wastewater sources,but they often demand high energy and/or high cost,and in some cases produce contaminant laden sludge that requires safe *** need for methods which are less capital intensive,less operationally costly and more environmentally friendly is ***-based materials have emerged as promising candidates for wastewater treatment due to their renewability,low cost,biodegradability,hydrophilicity,and antimicrobial *** this review article,we focussed on developing sustainable and biodegradable cellulose-based materials for wastewater *** article deals with cellulose-based materials’scope and their conversion into valuable products like hydrogel,aerogel,cellulose composites,and *** cellulose-based materials have no harmful environmental impact and are *** modified cellulose-based materials applying as membrane,adsorbent,sorbent,and beads to purify the wastewater were ***,the challenges and future prospects of cellulose-based materials for wastewater treatment were considered,emphasizing their potential to be sustainable and eco-friendly alternatives to traditional materials used in wastewater treatment.

关键词： Cellulose Wastewater treatment Hydrogel Nanocrystal Cellulose membrane

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A perspective review on the biosynthesis of plant-based secondary metabolites and their application as potent drugs

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BIOCELL 2024年第4期48卷 541-557页

作者： JHILAM PRAMANIK AKASH kumar SARVESH RUSTAGI MEHAK KATYAL SHEETAL thakur JUTISHNA BORA SUMIRA MALIK ANCHAL TREHAN NAYAN TALUKDAR PETR SLAMA Department of Food Technology ITM UniversityGwaliorIndia Department of Food Technology SRM UniversitySonipatIndia Department of Food Technology Uttaranchal UniversityDehradunIndia Department of Nutrition and Dietetics Manav Rachna International Institute of Research&Studies(MRIIRS)FaridabadIndia University Centre for Research and Development UIBTChandigarh UniversityMohaliIndia Amity institute of Biotechnology Amity UniversityJharkhandRanchiIndia Department of Biotechnology University Center for Research&Development(UCRD)Chandigarh UniversityMohaliPunjabIndia Department of Science Guru Nanak College of Pharmaceutical SciencesDehradunIndia Program of Biotechnology Faculty of ScienceAssam down town UniversityGuwahatiIndia Department of Animal Morphology Physiology and GeneticsMendel University in BrnoBrnoCzech Republic

Many phytochemicals and their derived metabolites produced by plants are extensively employed in commercial goods,pharmaceutical products as well as in the environmental and medicalﬁ***,these secondary metabolites obtained from plants are in low amounts,and it is difﬁcult to synthesize them at the industrial *** these challenges,they may be utilized for a variety of medicinal products that are either available in the market or are being researched and *** metabolites are complex compounds that exhibit ***,under controlled conditions with elicitors,desired secondary metabolites may be produced from plant cell *** review emphasizes the various aspects of secondary metabolites including their types,synthesis,and applications as medicinal *** article aims to promote the use of plant secondary metabolites in the management and treatment of various diseases.

关键词： Secondary metabolites Medicinal plant Synthesis Health benefits

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Climate-driven dengue fever outbreaks in Nepal:Trends,challenges,and strategies

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World Journal of Virology 2024年第4期13卷 135-138页

作者： Chandan kumar thakur Samita Adhikari Meghnath Dhimal Clinical Microbiology Karnali Academy of Health SciencesJumla 21200KarnaliNepal Hospital Infection Control Nepal Mediciti HospitalLalitpur 44700BagmatiNepal Research Section Nepal Health Research CouncilKathmandu 44600BagmatiNepal

Dengue fever(DF)has become a major public health concern in Nepal,with increasing outbreaks in recent *** by Aedes mosquitoes,this climate-sensitive viral disease presents a significant challenge for healthcare providers and *** 2004,Nepal has experienced a sharp increase in DF cases,peaking in 2022 with 54784 cases and 88 *** surge,driven mainly by serotypes 1,2,and 3,is exacerbated by climate change,which prolongs mosquito breeding seasons due to warmer temperatures and increased *** trend has even impacted previously unaffected hilly *** dengue control strategies must focus on climate change adaptation,strengthening healthcare system reinforcement,raising public awareness,and enhancing vector control *** initiatives,like the national dengue control program,play a critical role,but research and community engagement are also vital for prevention and early *** climate resilience into public health efforts is essential to reducing the dengue burden in Nepal.

关键词： Climate change Dengue fever Dengue outbreaks Dengue control Nepal Public health Vector-borne diseases

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Cellulose-based smart materials:Novel synthesis techniques,properties,and applications in energy storage and conversion devices

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Electron 2024年第2期2卷 159-195页

作者： Pariksha Bishnoi Samarjeet Singh Siwal Vijay kumar thakur Department of Chemistry M.M.Engineering CollegeMaharishi Markandeshwar(Deemed to be University)Mullana-AmbalaHaryanaIndia Biorefining and Advanced Materials Research Center Scotland's Rural College(SRUC)EdinburghUK 3School of WaterEnergy and EnvironmentCranfield UniversityCranfieldUK

There has been a significant scope toward the cutting-edge in-vestigations in hierarchical carbon nanostructured electrodes originating from cellulosic materials,such as cellulose nanofibers,available from natural cellulose and bacterial *** of energy storage systems(ESSs)are typically established upon inorganic/metal mixtures,carbonaceous implications,and petroleum-derived hydrocarbon ***,these conventional substances may need help fulfilling the ever-increasing needs of *** has grown significantly as an impressive 1D element due to its natural availability,eco-friend-liness,recyclability,structural identity,simple transformation,and dimensional ***,in this review article,we have discussed the role and overview of cellulose-based hydrogels in ***,the extraction sources and solvents used for dissolution have been dis-cussed in ***,the properties(such as self-healing,trans-parency,strength and swelling behavior),and applications(such as flexible batteries,fuel cells,solar cells,flexible supercapacitors and carbon-based derived from cellulose)in energy storage devices and conclusion with existing challenges have been updated with recent findings.

关键词： batteries cellulose-based materials energy storage devices fuel cells hydrogels supercapacitors

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Influence of rooftop telecommunication tower on set back-step back building resting on different ground slopes

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Earthquake Engineering and Engineering Vibration 2019年第2期18卷 351-362页

作者： Amit thakur Deepankar kumar Ashish Surender kumar Verma Civil Engineering Department Kurukshetra University Civil Engineering Department Maharaja Agrasen Institute of Technology Maharaja Agrasen University Civil Engineering Department Punjab Engineering College (Deemed to be University)

In the hilly region due to scarcity of the plain area, buildings like set back-step back are more often used and also as a big surge in the telecommunication industries, rooftop tower adaptation is very common story nowadays. In the present study an analogy has been drawn to find out the influence of the rooftop telecommunication tower on the setback-step back building resting on ground at 20° and 30° slopes. A dynamic analysis has been performed and compared on the 4 legged angled section telecommunication tower which is located on the roof top of set back-step back building by varying positions of tower with the existing host structure built up on ground slope of 20° and 30° in both directions(X and Y).

关键词： rooftop telecommunication tower set back-step back building response spectrum analysis steel, RC frame, earthquake SAP2000

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An Approach Using Fuzzy Sets and Boosting Techniques to Predict Liver Disease

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Computers, Materials & Continua 2021年第9期68卷 3513-3529页

作者： Pushpendra kumar Ramjeevan Singh thakur Maulana Azad National Institute of Technology BhopalIndia Central University of Jharkhand RanchiIndia

The aim of this research is to develop a mechanism to help medical practitioners predict and diagnose liver *** systems have been proposed to help medical experts by diminishing error and increasing accuracy in diagnosing and predicting *** many existing methods,a few have considered the class imbalance issues of liver disorder *** all the samples of liver disorder datasets are not useful,they do not contribute to learning about classifiers.A few samples might be redundant,which can increase the computational cost and affect the performance of the *** this paper,a model has been proposed that combines noise filter,fuzzy sets,and boosting techniques(NFFBTs)for liver disease ***,the noise filter(NF)eliminates the outliers from the minority class and removes the outlier and redundant pair from the majority ***,the fuzzy set concept is applied to handle uncertainty in ***,the AdaBoost boosting algorithm is trained with several learners viz,random forest(RF),support vector machine(SVM),logistic regression(LR),and naive Bayes(NB).The proposed NFFBT prediction system was applied to two datasets(i.e.,ILPD and MPRLPD)and found that AdaBoost with RF yielded 90.65%and 98.95%accuracy and F1 scores of 92.09%and 99.24%over ILPD and MPRLPD datasets,respectively.

关键词： Fuzzy set imbalanced data liver disease prediction machine learning noise filter

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