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Singh Rakesh,Deshmukh Narayan,Lalla Rakesh,Khadilkar Satish 대한신경중재치료의학회 2020 Neurointervention Vol.15 No.3
Spinal dural arteriovenous fistulae (AVF) are rare and can result in spinal cord dysfunction. We present one such case wherein the patient presented with a venous congestive myelopathy. Magnetic resonance imaging showed a syrinx formation, spinal cord edema, and flow voids. Digital subtraction angiography confirmed the dural AVF, which was treated with embolization. The syrinx disappeared, other spinal cord changes improved, and the patient had remarkable clinical improvement. The case is presented to draw attention to the rare formation of a syrinx in a spinal dural arteriovenous fistula and its disappearance after successful embolization.
INTEGRABILITY OF DISTRIBUTIONS IN GCR-LIGHTLIKE SUBMANIFOLDS OF INDEFINITE KAEHLER MANIFOLDS
Kumar, Rakesh,Kumar, Sangeet,Nagaich, Rakesh Kumar Korean Mathematical Society 2012 대한수학회논문집 Vol.27 No.3
In present paper we establish conditions for the integrability of various distributions of GCR-lightlike submanifolds and obtain conditions for the distributions to define totally geodesic foliations in GCR-lightlike submanifolds.
Vaccine adjuvants: smart components to boost the immune system
Rakesh Bastola,Gyubin Noh,금태광,Santosh Bashyal,서조은,최재웅,오연수,조영식,이상길 대한약학회 2017 Archives of Pharmacal Research Vol.40 No.11
Vaccination is an effective approach to preventthe consequences of infectious diseases. Vaccinesstrengthen immunity and make individuals resistant toinfections with pathogens. Although conventional vaccinesare highly immunogenic, they are associated with somesafety issues. Subunit vaccines are safe, but they requireadjuvants to stimulate the immune system because of theirweaker immunogenicity. Adjuvants are entities incorporatedinto vaccines to increase the immunogenic responsesof antigens. They play a crucial role in increasing thepotency and efficacy of vaccines. Different adjuvants havedifferent modes of action; therefore, a better understandingof their immunology could provide guidance for thedevelopment of novel adjuvants. Numerous studies havebeen conducted using different types of adjuvants tocharacterize their potency and safety; however, in practice,only few are used in human or animal vaccines. Thisreview aims to introduce the different modes of action ofadjuvants and give insight into the types of adjuvants thatpossess the greatest potential for adjuvanticity.
Analysis of Various COVID-19 Prediction Techniques
Rakesh Kumar Arora,Manoj Kumar Gupta,Bhoopesh Singh Bhati 대한전자공학회 2021 IEIE Transactions on Smart Processing & Computing Vol.10 No.4
There is no precise treatment available for COVID-19, but treatment of a number of signs/symptoms is possible. This treatment is provided in accordance with the clinical position of the patient. Furthermore, supplementary care is proven as efficient for infected people. COVID-19 prediction techniques follow various steps, which include dataset collection, pre-processing, feature extraction, and classification. Numerous COVID-19 prediction techniques have been proposed in the literature. In this paper, various techniques are systematically reviewed on the basis outcomes, advantages, and disadvantages.
Rakesh K. Jha,김성완,Sunghwan Kim 한국잠사학회 2024 International Journal of Industrial Entomology Vol.48 No.1
For over five millennia, humans have benefited from the valuable byproducts of Bombyx mori silkworms nourished on mulberry leaves and a multitude of potential applications remains available due to the diverse array of silkworm varieties. In this work, we discuss the utilization of Daehwangjam (DHJ), golden silk (GS), and Juhwangjam (JHJ), distinctive colored silks found in Korea, as chemosensors. These novel silks emit fluorescence under external stimuli and show a diminishing fluorescence intensity when exposed to HCl vapor. The considerable surface-to-volume ratio of these cocoons allows for the identification of 5 ppm, 300 ppm, and 3000 ppm HCl vapors through decreased fluorescence intensity. The results show the suitability of natural DHJ, GS, and JHJ for applications in biosensing applications.
Development of a Cajanus cajanifolius-based CMS Hybrid Technology in Pigeonpea
Rakesh Kumar Srivastava,Kul Bhushan Saxena,Ravikoti Vijaya Kumar 한국작물학회 2018 Journal of crop science and biotechnology Vol.21 No.5
Pigeonpea is an important food legume of the semi-arid tropics grown mainly under subsistence agriculture. As a first step to address the five decades-long yield stagnation, a proof-of-concept for a commercially viable CMS-based hybrid technology with high standard heterosis and fertility restoration has been demonstrated. Six generations of backcrossing and selection for male sterility, and agronomic superiority using a Cajanus cajanifolius- (A4 cytoplasm) based CMS donor (ICPA 2039) and a medium-maturity group recurrent parent ICPL 20176 (ICPB 2043) which resulted in a stable male sterile line (ICPA 2043) with near-perfect male sterility and superior agronomic traits. Following backcrossing and selections, the A-line (ICPA 2043) appeared to be morphologically similar in terms of various qualitative and quantitative traits compared to the B-line (ICPB 2043). However, differences between ICPA 2043 and ICPB 2043 were observed for days to maturity, 100-seed weight, pods plant-1, and seed weight plant-1. These differences may not be genetic but physiological. The best heterotic restorer line selected in a cross (ICPH 2671) combination restored a mean of 96.49% male fertility in 36 environments (12 locations, 3 years). Present investigation did not reveal significant G×E interaction for fertility restoration, indicating the possibility of obtaining high and stable grain yields in the pigeonpea growing areas of South and Central India.
Rakesh K. Sonker,Rajkamal Shastri,B.C. Yadav 장전수학회 2019 Proceedings of the Jangjeon mathematical society Vol.22 No.1
Conducting polymers have been concerned the ample interest of scientific community due to its special physical and chemical properties. Among this group of materials, the Polyaniline (PANI) merits special attention due to its high thermal and chemical stability under normal conditions, simple process of polymerization low cost and well-studied electrochemical characteristics. In the present work, Density functional theory (DFT) method has been applied for geometry optimization using B3LYP/6-31G** basis set, implemented on Gaussian 09 software package. The well-known model, time-dependent DFT (TDDFT) calculations at the UB3LYP/6-31G(d) level have been performed to investigate the tunable nature, i.e., doping processes, of polyaniline (PANI). The calculated theoretical data show strong correlation with the recent experimental reports, which validates our computational protocol. The calculated properties are extrapolated to the polymer (PANI) through a second-order polynomial fit. Changes in band gap, conductivity, and resistance of (PANI_n) and (PANI_n) (where n = 1-4 and) were studied. Further we have also synthesized and characterized the Polyaniline. The deviations in the obtained results have clearly shown the promising of Polyaniline as a quantity sensitive material that may be useful for the sensing application.
Impact of Back Gate Bias on Analog Performance of Dopingless Transistor
Rakesh Kumar,Meena Panchore 한국전기전자재료학회 2023 Transactions on Electrical and Electronic Material Vol.24 No.1
In this brief, the impact of back gate bias (Vgb) , on analog performance of silicon on insulator dopingless transistor (SOIDLT) is investigated. It is observed that SOI-DLTs are more immune to Vgb in contrast to its conventional counterpart SOI junctionless transistor (SOI-JLT). When Vgb is increased from -1.5 V to 1.5 V, the variation in transconductance (gm) and intrinsic gain ( gmrO ) of SOI-JLT is 1.3 and 21.4 times higher than SOI-DLT. The insignifi cant variation is observed in gm and gmrO of SOI-DLT against V gb than SOI-JLT due to the use of lightly doped channel. Further, the device reliability of SOI-DLT against impact ionization is evaluated by measuring the electron concentration and electric field near the drain side. We have found that the SOI-DLT is less sensitive to impact ionization in comparison to conventional SOI-JLT. Hence, the simulation results shown in this paper offer an opportunity for future analog integrated circuits designing with SOI-DLT structure under the influence of Vgb .
Flexural-Torsional Coupled Vibration of Slewing Beams Using Various Types of Orthogonal Polynomials
Rakesh K. Kapania,Yong-Yook Kim 대한기계학회 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.11
Dynamic behavior of flexural-torsional coupled vibration of rotating beams using the Rayleigh-Ritz method with orthogonal polynomials as basis functions is studied. Performance of various orthogonal polynomials is compared to each other in terms of their efficiency and accuracy in determining the required natural frequencies. Orthogonal polynomials and functions studied in the present work are; Legendre, Chebyshev, integrated Legendre, modified Duncan polynomials, the special trigonometric functions used in conjunction with Hermite cubics, and beam characteristic orthogonal polynomials. A total of 5 cases of beam boundary conditions and rotation are studied for their natural frequencies. The obtained natural frequencies and mode shapes are compared to those available in various references and the results for coupled flexural-torsional vibrations are especially compared to both previously available references and with those obtained using NASTRAN finite element package. Among all the examined orthogonal functions, Legendre orthogonal polynomials are the most efficient in overall CPU time, mainly because of ease in performing the integration required for determining the stiffness and mass matrices.