http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Suman,C.S.Pundir 한국물리학회 2003 Current Applied Physics Vol.3 No.2, 3
Commercially available cholesterol esterase, cholesterol oxidase and peroxidase have been co-immobilized onto alkylamine glassinitial activity. The co-immobilized enzyme system showed maximum activity at pH 7.0, when incubated at 37.C for 12 min. Amethod was developed for total serum cholesterol determination employing co-immobilized enzymes. There was a linear rela-tionship betweenA520 and cholesteryl acetate concentration ranging from 5mg to 50 mg/dl reaction mixture. The minimum de-tection limit of the method is 50 mg/dl. Within day and between day coecient of variation were< 1.0% and < 6%, respectively. Ar¼ 0:83) was found between the total serum cholesterol obtained by the present method and commercial Enzo-kitmethod employing free enzymes. Among the various serum substances tested at their physiological concentrations; Testosterone, vitD and progesterone caused 59%, 41% and 39% inhibition, while NaCl, KCl, CuSO4, creatinine, NaHCO3, albumin and estrogenhad practically no eect.. 2002 Elsevier Science B.V. All rights reserved.
Suman Laxmi Narayan,De Souvik,Sharma Gaurav,Mandal Udita,Bhattacherjee Rashmi,Banerjee Dhriti,Suman Devi Shankar 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.3
Biological control of larval mosquitoes is in great demand due to the development of resistance against synthetic insecticides, environmental toxicity and the inability to protect habitats from further oviposition. In the present study, three botanical essential oils (BEOs) – citronella, eucalyptus, and pine oils – were formulated for the assessment of larvicidal and oviposition repellent efficacies against Culex quinquefasciatus Say, the filaria vector. The GC–MS profiling of BEOs showed the presence of 16 – 19 compounds covering 87.7–93% of oil composition. The resistance status of Culex quinquefasciatus population was evaluated with temephos (LC 50 = 0.001 ppm, LC 90 = 0.01 ppm). Larval bioassay of emulsifiable concentrate (EC) formulations prepared from eucalyptus and pine oils showed promising efficacy (LC 50 = 22.7 and 23.2 ppm) and LC 90 (63.8 and 62.4 ppm) compared to citronella oil EC (LC 50 = 43.4 ppm and LC 90 = 199.0 ppm). The field trials of eucalyptus + pine (1:1 ratio) EC showed 100% larval mortality for 3 weeks at 300 ppm compared to 2 weeks of individual oils. Further, the oviposition attraction index (OAI) for ECs of eucalyptus, pine, and their combination showed complete protection of breeding habitats from oviposition at 1st week and − 0.9 to − 1.0 OAI at 2nd week with slight reduction to − 0.5 at 3rd week. Citronella EC provided shortest larvicidal and oviposition repellent efficacy under the field con ditions. The promising mosquitocidal activities of EC formulations of eucalyptus and pine or their combination suggest them as potential biocontrol vector control candidates over citronella oil.
Suman Tripathi,Maheshwar Sharon,N.N. Maldar,Jayashri Shukla,Madhuri Sharon 한국탄소학회 2013 Carbon Letters Vol.14 No.4
The synthesis of carbon nanomaterials (CNMs) by a chemical vapor deposition method using three different plant oils as precursors is presented. Because there are four param-eters involved in the synthesis of CNM (i.e., the precursor, reaction temperature of the furnace, catalysts, and the carrier gas), each having three variables, it was decided to use the Taguchi optimization method with the ‘the larger the better’ concept. The best parameter regarding the yield of carbon varied for each type of precursor oil. It was a temperature of 900°C + Ni as a catalyst for neem oil; 700°C + Co for karanja oil and 500°C + Zn as a catalyst for castor oil. The morphology of the nanocarbon produced was also impacted by different parameters. Neem oil and castor oil produced carbon nanotube (CNT) at 900°C; at lower temperatures, sphere-like structures developed. In contrast, karanja oil produced CNTs at all the assessed temperatures. X-ray diffraction and Raman diffraction analyses confirmedthat the nanocarbon (both carbon nano beads and CNTs) produced were graphitic in nature.
Netflix, Amazon Prime, and YouTube: Comparative Study of Streaming Infrastructure and Strategy
Suman Pandey,문양세,최미정 한국정보처리학회 2022 Journal of information processing systems Vol.18 No.6
Netflix, Amazon Prime, and YouTube are the most popular and fastest-growing streaming services globally. Itis a matter of great interest for the streaming service providers to preview their service infrastructure andstreaming strategy in order to provide new streaming services. Hence, the first part of the paper presents adetailed survey of the Content Distribution Network (CDN) and cloud infrastructure of these service providers. To understand the streaming strategy of these service providers, the second part of the paper deduces a commonquality-of-service (QoS) model based on rebuffering time, bitrate, progressive download ratio, and standarddeviation of the On-Off cycle. This model is then used to analyze and compare the streaming behaviors of theseservices. This study concluded that the streaming behaviors of all these services are similar as they all useDynamic Adaptive Streaming over HTTP (DASH) on top of TCP. However, the amount of data that theydownload in the buffering state and steady-state vary, resulting in different progressive download ratios,rebuffering levels, and bitrates. The characteristics of their On-Off cycle are also different resulting in differentQoS. Hence a thorough adaptive bit rate (ABR) analysis is presented in this paper. The streaming behaviors ofthese services are tested on different access network bandwidths, ranging from 75 kbps to 30 Mbps. The surveyresults indicate that Netflix QoS and streaming behavior are significantly consistent followed by Amazon Primeand YouTube. Our approach can be used to compare and contrast the streaming services’ strategies and finetunetheir ABR and flow control mechanisms.
Impact of the concentration of multiwall carbon nanotubes on polyaniline
Suman Lal,S.K. Tripathi,Nitin Sood,Samriti Khosla 한국정보디스플레이학회 2014 Journal of information display Vol.15 No.3
In this paper, pure polyaniline (PANI) and its composites were synthesized with different concentrations of multiwall carbonnanotubes (MWCNTs), and their formation was characterized using different characterizing tools. The XRD pattern andscanning electron microscope images showed a homogeneous coating of the PANI on the MWCNTs, which indicated thedispersion of the carbon nanotubes into a polymer matrix. The Fourier transform infrared confirmed the interaction betweenthe MWCNTs and the PANI through a quinoid ring, which caused the PANI chains to be adsorbed on the surface of theMWCNT and formed a tubular core surrounded by MWCNTs. The UV spectroscopy data accounted for the lower opticalband gap of the PANI/MWCNT composites. The electrical transport properties of the different PANI/MWCNT compositeswere investigated using two-probe method techniques, which showed that the conductivity of the PANI/MWCNTcompositesincreased with increases in the concentration of the MWCNTs and the temperature. This enhancement in conductivity wasexplained on the basis of the band gap and charge transfer effect.
Application of Cavity Expansion Theory for Evaluating Skin Friction of Tapered Piles in Sands
Suman Manandhar,Noriyuki Yasufuku,Kiyoshi Omine 한국지반공학회 2012 international journal of geo-engineering Vol.4 No.3
This paper discusses the effects of tapered pile penetration in sandy soils after having obtained evidence of its merits over straight-sided cylindrical piles in evaluating skin friction. Experimental model tests confirmed that a slight increase in the angle of tapering also led to a major increase in skin friction. Based on this evidence, the authors adopted an analytical solution to evaluate the skin friction of tapered piles, The cylindrical cavity expansion theory is an appropriate analytical closed-form solution in determining the skin friction of tapered piles at different phases of soils at different relative densities, A new arrangement was inserted by introducing a stress-dilatancy relationship in the ideal elastic-plastic model of cavity expansion application, n general. for easy computation, he angle of internal friction or dilatancy angle is assumed to he constant to compute the skin friction. This drawback was improved upon and both properties considered in evaluating skin friction at each depth iteratively. This paper assesses the results of paranietric studies on different types of model tests, prototype tests and real type pile tests in order to predict the proposed model. The proposed extended model validates the determination of skin friction using a stress-dilatancy relationship.
Suman Gahlyan,Sweety Verma,Manju Rani,Sanjeev Maken 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.5
The deviation in viscosity was coupled with respective excess molar volume data to study the molecular interaction in binary mixtures with one associated component. This approach was applied to the experimentally measured viscosity and excess molar volume data of the 2-propanol+hydrocarbons at 298.15 K and 308.15 K. It was suggested that depolymerization power of aromatic hydrocarbon toward 2-propanol as well as strength of intermolecular interactions (electron-donor-acceptor type) between monomer of 2-propanol and aromatics depend on -electron density of the aromatic hydrocarbon. These interactions were further confirmed by FTIR spectroscopy. The viscosity of these binary mixtures was best predicted by Gruenberg-Nissan correlation among the four correlations applied.
Review of State-of-the-Art Sensor Applications Using Mechanoluminescence Microparticles
Suman Timilsina,김지식,김재환,김기우 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.9
The term mechanoluminescence (ML) refers to the light emission from various organic and inorganic materials in response to mechanical stimuli such as friction, tension, fracture, and compression. Recently, this interesting luminescence phenomenon has enabled us to explore various advanced sensor applications. In this review article, the overall ML mechanism that arises under different experimental conditions is discussed thoroughly. The recent research achievements of state-of-the-art sensors based on ML microparticles such as SrAl2O4:Eu,Dy (SAO), ZnS:Cu, and ZnS:Mn are then reviewed. As a new functional smart material, SAO ML microparticles can be used in possible substitutive and substantial methods for structural health monitoring (SHM) systems, owing to their relative simplicity but effectiveness in detecting arrested or propagating crack tips, and in assessing the in-situ structural state by means of fracture parameters such as stress intensity factors. The applicability of ML paint and thin films on various types of ceramics and concretes as fracture sensors is reviewed. The research on sensors based on different ML microparticles such as noncontact torque sensors based on ZnS:Cu, flexible pressure sensors and impact sensors using ZnS:Mn is also reviewed in this article. Potential applications using ML microparticles are also briefly discussed.