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stability of three-dimensional printable foam concrete as function of surfactant characteristics

Frontiers of structural and Civil Engineering 2023年第6期17卷 935-947页

作者： Uday BODDEPALLI Indu siva Ranjani GANDHI Biranchi panda Department of Civil Engineering Indian Institute of TechnologyGuwahatiAssam781039India sustainable Resources for Additive Manufacturing(sReAM)Laboratory Department of Mechanical EngineeringIndian Institute of TechnologyGuwahatiAssam781039India

Extrudability is one of the most critical factors when designing three-dimensional printable foam *** extrusion process likely affects the foam stability which necessitates the investigation into surfactant properties particularly for concrete mixes with high foam *** many studies have been conducted on traditional foam concrete in this context,studies on three-dimensional printed foam concrete are *** address this research gap,the effects of surfactant characteristics on the stability,extrudability,and buildability of three-dimensional printed foam concrete mixes with two design densities(1000 and 1300 kg/m^(3))using two different surfactants and stabilizers(synthetic-based sodium lauryl sulfate stabilized with carboxymethyl cellulose sodium salt,and natural-based hingot surfactant stabilized with xanthan gum)were investigated in this *** density tests were conducted before and after the extrusion to determine stability of the foam *** results were then correlated with surfactant qualities,such as viscosity and surface tension,to understand the importance of key parameters in three-dimensional printing of foam *** on the experimental results,surfactant solu1tion with viscosity exceeding 5 m Pa·s and surface tension lower than 31 mN/m was recommended to yield stable three-dimensional printable foam concrete ***,the volume of foam in the mix significantly affected the printability *** traditional foam concrete,the variation in the stabilizer concentration and density of concrete were found to have insignificant effect on the fresh-state-characteristics(slump,slump flow,and static yield stress)and air void microstructure of the stable mixes.

关键词： foam concrete 3D printable concrete stability rheology air void microstructure

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synthesis and characterization of manganese tetroxide(Mn_(3)O_(4))nanofibers by electrospinning technique

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Journal of Advanced Ceramics 2013年第1期2卷 26-30页

作者： Benudhar sAHOO Prasanta kumar panda Materials science Division CSIR-National Aerospace LaboratoriesKodihalliP.B.No.1779Bangalore 560017India

Manganese tetroxide(Mn_(3)O_(4))nanofibers were prepared by electrospinning homogeneous viscous solution of 20 wt%,28 wt%and 36 wt%manganese acetate in poly vinyl alcohol(PVA)and calcining the nanofibers at 1000℃for 2 *** was carried out at 9 kV DC with tip to collector distance(TCD)of 7 *** gravimetric analysis(TGA)of the fibers indicates the pure phase of manganese oxide above 500℃.XRD analysis of calcined(at 1000℃)nanofibers indicates the formation of phase-pure tetragonal Mn_(3)O_(4).scanning electron microscopy(sEM)studies show the fibers cylindrical with the diameters in the range of 100-600 nm and aspect ratio>*** general,the average diameter of the green fibers decreases with the increase in manganese acetate *** diameter of calcined nanofibers is reduced by 34%.

关键词： electrospinning manganese tetroxide poly vinyl alcohol nanofiber

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Molecular characterization and expression patterns of Nanog gene validating its involvement in the embryonic development and maintenance of spermatogonial stem cells of farmed carp,Labeo rohita

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Journal of Animal science and Biotechnology 2018年第4期9卷 824-840页

作者： swagat k.Patra Chakrpani Vemulawada Meenati M.soren Jitendra k.sundaray Manoj k.panda Hirak k.Barman Fish Genetics and Biotechnology Division ICAR-Central Institute of Freshwater Aquaculture Center of Biotechnology Siksha 'O' Anusandhan University

Background: The homeobox containing transcription factor Nanog plays crucial roles in embryonic development/proliferation and/or maintenance of spermatogonial stem cells(ssCs) via interacting with transcription factors such as Oct4 and sox2 in mammals. However, knowledge of its exact mechanistic pathways remains unexploited. Very little is known about teleost Nanog. Information on the Nanog gene of farmed rohu carp(Labeo rohita) is lacking. We cloned and characterized the Nanog gene of rohu carp to understand the expression pattern in early developmental stages and also deduced the genomic organization including promoter ***: Rohu Nanog(LrNanog) cDNA comprised an open reading frame of 1,161 nucleotides bearing a structural homeodomain; whereas, the genomic structure contained four exons and three introns suggesting that it is homologous to mammalian counterparts. Phylogenetical y, it was closely related to freshwater counterparts. Protein sequence(386 AA of42.65 kDa) comparison revealed its low similarity with other vertebrate counterparts except that of the conserved homeodomain. Tissue distribution analysis revealed the existence of LrNanog transcripts only in adult gonads. The heightened abundances in the ovary and proliferating spermatogonia suggested its participations in maternal inheritance and male germ cell development. The potentiating abundances from fertilized egg onwards peaking at blastula stage vis-à-vis decreasing levels from gastrula stage onwards demonstrated its role in embryonic stem cell development. We also provided evidence of its presence in ssCs by western blotting analysis. Further, the promoter region was characterized, predicting a basal core promoter and other consensus ***: The molecular characterization of LrNanog and its documented expression profiling at transcript and protein levels are indicative of its functional linkage with embryonic/spermatogonial stem cell maintenance. This is the first report of L

关键词： Embryonic stages Gene expression Nanog Promoter analysis Rohu(Labeo rohita) spermatogonial cell

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Administration of Fenugreek seed Extract Produces Better Effects in Glibenclamide-Induced Inhibition in Hepatic Lipid Peroxidation: An in vitro study

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Chinese Journal of Integrative Medicine 2019年第4期25卷 278-284页

作者： sharma Neha kar Anand panda sunanda school of Life sciences Devi Ahilya UniversityTakshashila CampusIndore452017India

Objective: To evaluate the comparative effects of fenugreek(Trigonel a foenum graecum) seed extract(FsE) alone and in combination with an antidiabetic conventional medicine,glibenclamide(GLB),on the inhibition of in vitro lipid peroxidation(LPO) in liver,the major target organ of a ***: LPO was induced by ferrous sulphate(Fe so4),hydrogen peroxide(H2 O2) and carbon tetrachloride(CCl4) and the effects of test seed extract and/or GLB were ***: While Fe so4,H2 O2 and CCl4 markedly enhanced the hepatic LPO,simultaneous administration of FsE reduced it in a concentration dependent ***,when both FsE and GLB were added to the incubation mixture,chemical y induced hepatic LPO was further *** test extract also exhibited high antioxidative activity in 1,1-diphenyl-2-picrylhydrazyl radical and in 2,2'-azino-bis,3-ethylbenzothiazoline-6-sulphonic acid radical scavenging ***: FsE therapy in moderate concentration along with a hypoglycemic drug may prove to be advantageous in ameliorating diabetes mel itus and other diseases that are LPO mediated.

关键词： fenugreek glibenclamide antioxidant activity lipid peroxidation

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synthesis and microwave dielectric behavior of (Bi_(1-x)Pb_(x))NbO_(4) ceramics

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Journal of Advanced Dielectrics 2016年第1期6卷 61-68页

作者： s.P.Butee k.R.kambale shaishav Upadhyay s.Bashaiah k.C.James Raju Himanshu panda Department of Metallurgy and Materials science College of Engineering Pune(An Autonomous Institute of Government of Maharashtra)Maharashtra 411005 India school of Physics University of HyderabadTelungana 500046India Department of Materials Engineering Defence Institute of Advanced Technology PuneMaharashtra 411025India

Ceramic samples of(Bi_(1-x)Pb_(x))NbO_(4)(x=0,0.025,0.05,0.10,0.15,0.20)with 0.75 wt.%V2O5 addition sintered at 920℃,940℃ and 960℃ are *** is selected as a substitute for Bi^(3+)in BiNbO_(4) ceramics as it exists in two stable valence states of+2 and+4 and the average valency matches to that of Bi^(3+).The average shannon radius(for octahedral coordination)of Pb^(2+)(1.19Å)and Pb^(4+)(0.775Å)cations is 0.9825Å,which is similar to that of Bi^(3+)ion(1.03Å).The dense(>94%)polycrystalline(Bi_(1-x)Pb_(x))NbO_(4) samples fabricated mostly reveal orthorhombic(Pnna)phase(α-BiNbO_(4),***.52)by powder *** of satellite Pb2Nb2O7 phase,the amount of which is increasing with increase in Pb content,is also *** microwave dielectric constant(ε'r)values of the niobates are found to increase from 42 to 71,whereas the quality factor(Qu.f)values are found to decrease from 5400 to 550 GHz with increasing substitution of *** compositions so synthesized are important as hardly there are any microwave dielectric ceramics available with 45<ε'r<75.

关键词： Ceramics sintering BiNbO_(4) microwave dielectric properties quality factor

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Controlling Remote Robots Based on Zidan’s Quantum Computing Model

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Computers, Materials & Continua 2022年第12期73卷 6225-6236页

作者： Biswaranjan panda Nitin kumar Tripathy shibashankar sahu Bikash k.Behera Walaa E.Elhady Indian Institute of science Education and Research Berhampur760005India Bikash’s Quantum(OPC)Private Limited BalindiMohanpur741246West BengalIndia Faculty of Computers and Information Technology The National Egyptian E-Learning UniversityCairoEgypt

In this paper,we propose a novel algorithm based on Zidan’s quantum computing model for remotely controlling the direction of a quantumcontrolledmobile robot equippedwith *** proposed algorithm is based on the measurement of concurrence value for the different movements of the *** a faraway robot that moves in the deep space(e.g.,moves toward a galaxy),and it is required to control the direction of this robot from a ground station by some person *** sends an unknown qubitα|0)+β|1)via the teleportation protocol to the ***,the proposed algorithm decodes the received unknown qubit into an angleθ,that determines the motion direction of the robot,based on the concurrence *** proposed algorithm has been tested for four and eight *** simulators have been tested;IBM Quantum composer and IBM’s system,The two simulators achieved the same result *** motion of any part of the robot is considered,if it has a pre-existing sensor system and a locomotive system,.We can use this technique in many places like in space robots(16 directions).The results show that the proposed technique can be easily used for a huge number of ***,increasing the number of movements of the robot will increase the number of qubits.

关键词： Quantum neural network competitive learning swap test quantum robots

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Effect of lanthanum,neodymium on piezoelectric,dielectric and ferroelectric properties of PZT

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Journal of Advanced Ceramics 2013年第1期2卷 37-41页

作者： Benudhar sAHOO Prasanta kumar panda Materials science Division CSIR-National Aerospace LaboratoriesKodihalliP.B.No.1779Bangalore 560017India

The effect of La^(3+)and Nd^(3+)on piezoelectric,dielectric and ferroelectric properties of PZT(Pb(Zr_(0.53)Ti_(0.47))O_(3))was *** powders were prepared by“wet-chemical”route followed by calcination at 800℃for 4 *** analysis of the calcined powders confirms the tetragonal phase in the undoped PZT,which gradually decreases with the dopant concentration and the appearance of rhombohedral phase *** study of sintered pellets reveals the decrease in grain size with the increase in dopant concentration beyond 0.02 mol Nd^(3+)and 0.03 mol La^(3+)*** piezoelectric constant(d_(33))and dielectric properties were maximum for 0.02 mol Nd^(3+)and 0.03 mol La^(3+)*** remnant polarization of La^(3+)-doped sample was higher than Nd^(3+)-doped sample,and the sample with combined dopants shows intermediate remnant polarization(P_(r)).Based on the above study,it is concluded that La^(3+)is more effective than Nd^(3+),including in a mixture of La^(3+)and Nd^(3+)dopants.

关键词： lead zirconate titanate wet-chemical piezoelectric dielectric ferroelectric

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Two-Phase-sQP Method with Higher-Order Convergence Property

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Journal of the Operations Research society of China 2016年第3期4卷 385-396页

作者： suvra kanti Chakraborty Geetanjali panda Department of Mathematics Indian Institute of Technology KharagpurKharagpur 761302India

We propose a two-phase-sQP(sequential Quadratic Programming)algorithm for equality-constrained optimization *** this paper,an iteration process is developed,and at each iteration,two quadratic sub-problems are *** is proved that,under some suitable assumptions and without computing further higher-order derivatives,this iteration process achieves higher-order local convergence property in comparison to Newton-sQP *** advantage and a note on l1 merit function associated to the method are provided.

关键词： Constrained optimization Newton-sQP method Cubic-order convergence

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s-transformation based integrated approach for spectrum estimation, storage, and sensing in cognitive radio

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Digital Communications and Networks 2019年第3期5卷 160-169页

作者： Pyari Mohan Pradhan Ganapati panda Department of Electronics and Communication Engineering Indian Institute of Technology Roorkee Uttarakhand 247667 India Electronics and Telecom Engineering Department C. V. Raman Colledge of Engineering Bhubaneswar Odisha 752054 India

Cognitive Radio (CR) uses the principle of dynamic spectrum allocation to improve the utilization of spectrum bands. The estimation of missing data is essential for maintaining an uninterrupted quality of service in the CR. However, the existing methods are not suitable for interpolating missing data in high frequency signals. The storage of spectrum occupancy information is crucial for learning the spectrum usage and prediction. The existing techniques for wideband spectrum sensing suffer from poor edge detection capabilities. This paper proposes an sTransformation (sT) based approach to solve these problems. For missing samples, the proposed method improves the accuracy of estimation. The sT can also be used to store the spectrum occupancy information. The simulation results show that the proposed scheme outperforms others by improving the accuracy of edge detection. Further, the simple implementation of the sT in the frequency domain is an advantage for the real time application.

关键词： Cognitive radio s-transformation Missing data estimation Wideband sensing spectrum occupancy

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small-signal model parameter extraction of E-mode N-polar GaN MOs-HEMT using optimization algorithms and its comparison

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Journal of semiconductors 2018年第7期39卷 59-66页

作者： d.k.panda g.amarnath t.r.lenka microelectronics and vlsi design group department of electronics and communication engineeringnational institute of technology silcharAssam788010India

An improved small-signal parameter extraction technique for short channel enhancement-mode N-polar GaN MOs-HEMT is proposed, which is a combination of a conventional analytical method and optimization techniques. The extrinsic parameters such as parasitic capacitance, inductance and resistance are extracted under the pinch-off condition. The intrinsic parameters of the small-signal equivalent circuit（ssEC） have been extracted including gate forward and backward conductance. Different optimization algorithms such as PsO, Quasi Newton and Firefly optimization algorithm is applied to the extracted parameters to minimize the error between modeled and measured s-parameters. The different optimized ssEC models have been validated by comparing the s-parameters and unity current-gain with TCAD simulations and available experimental data from the literature. It is observed that the Firefly algorithm based optimization approach accurately extracts the small-signal model parameters as compared to other optimization algorithm techniques with a minimum error percentage of 1.3%.

关键词： Firefly GaN MOs-HEMT PsO ssEC TCAD

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