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- 저자 : VERMA (검색결과 535 건)
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Gaurav Verma,Vikas Verma,Divya Sharma,Adesh Kumar,Himanshu Verma,Kartik Kalia 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.3
Unicode font is used in coding system that assign a unique code to every symbol of scripts irrespective of their platform, and language. The Greek Unicoder receives 16-bit hexadecimal code of alphabet. The device has been designed to convert Greek language into different languages that our people could understand. This Unicode reader code has been implemented on 28nm FPGA platform called Kintex-7 FPGA. In this paper we are using frequency scaling technique and Design goal. In this paper power analysis is our main concern and we have studied about the power analysis at different frequencies keeping the temperature constant at 25 degree Celsius and maintaining the constant air flow.
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Rahul K. Verma,Yuki Ogihara,Toshihiko Kuwabara,Kwansoo Chung 한국소성가공학회 2011 기타자료 Vol.2011 No.8
In this work, as non-proportional/non-monotonous deformation experiments, two-stage and tension-compression-tension uniaxial tests were performed, respectively, for a cold rolled ultra high strength dual phase steel sheet: DP780. Deformation behaviors under such deformation paths were found different than those of the ultra low carbon single phase steels observed by Verma et al. (Int. J. Plast. 2011, 82-101). To model the newly observed deformation behaviors, the combined type constitutive law previously proposed by Verma et al. (Int. J. Plast. 2011, 82-101) was successfully applied here. Permanent softening observed during reverse loading was properly characterized into the isotropic and kinematic hardening parts of the hardening law using tension-compression-tension test data. The cross effect observed in two-stage tests was also effectively incorporated into the constitutive law.
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Verma, Pradhuman,Verma, Kanika Gupta,Kumaraswam, Kikkeri Lakshminarayana,Basavaraju, Suman,Sachdeva, Suresh K.,Juneja, Suruchi Korean Academy of Oral and Maxillofacial Radiology 2014 Imaging Science in Dentistry Vol.44 No.3
Purpose: The present study was aimed to investigate the variation of soft palate morphology in different age and gender groups. The correlations of radiographic velar length (VL), velar width (VW), pharyngeal depth (PD), and Need's ratio with soft palate variants were also studied in the North Indian subpopulation. Materials and Methods: The study sample consisted of 300 subjects aged between 15 and 45 (mean: 31.32) years. The velar morphology on lateral cephalograms was examined and grouped into six types. The results obtained were subjected to a statistical analysis to find the correlation between variants of the soft palate with gender and different age groups. Results: The most frequent type of soft palate was leaf shaped (48.7%), and the least common was crook shaped (3.0%) among both the genders and various age groups, showing a significant correlation. The mean VL, VW, and PD values were significantly higher in males and significantly correlated with the types of soft palate. A significant correlation was observed between the mean VL, VW, PD, and Need's ratio with various age groups, showing an inconsistent pattern with an increase in age. The types of soft palate, gender, and Need's ratio were also significantly correlated, with an overall higher mean value of the Need's ratio among female subjects and the S-shaped soft palate. Conclusion: The knowledge of a varied spectrum of velar morphology and the variants of the soft palate help in a better understanding of the velopharyngeal closure and craniofacial anomalies.
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Pradhuman Verma,Kanika Gupta Verma,Kikkeri Lakshminarayana Kumaraswam,Suman Basavaraju,Suresh K. Sachdeva,Suruchi Juneja 대한영상치의학회 2014 Imaging Science in Dentistry Vol.44 No.3
Purpose: The present study was aimed to investigate the variation of soft palate morphology in different age and gender groups. The correlations of radiographic velar length (VL), velar width (VW), pharyngeal depth (PD), and Need’s ratio with soft palate variants were also studied in the North Indian subpopulation. Materials and Methods: The study sample consisted of 300 subjects aged between 15 and 45 (mean: 31.32) years. The velar morphology on lateral cephalograms was examined and grouped into six types. The results obtained were subjected to a statistical analysis to find the correlation between variants of the soft palate with gender and different age groups. Results: The most frequent type of soft palate was leaf shaped (48.7%), and the least common was crook shaped (3.0%) among both the genders and various age groups, showing a significant correlation. The mean VL, VW, and PD values were significantly higher in males and significantly correlated with the types of soft palate. A significant correlation was observed between the mean VL, VW, PD, and Need’s ratio with various age groups, showing an inconsistent pattern with an increase in age. The types of soft palate, gender, and Need’s ratio were also significantly correlated, with an overall higher mean value of the Need’s ratio among female subjects and the S-shaped soft palate. Conclusion: The knowledge of a varied spectrum of velar morphology and the variants of the soft palate help in a better understanding of the velopharyngeal closure and craniofacial anomalies.
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Jayeeta Verma,Sidharth Verma,Sumanthini V Margasahayam 대한치과마취과학회 2022 Journal of Dental Anesthesia and Pain Medicine Vol.22 No.5
Background: Postoperative endodontic pain is an enigma for the dentist. This study aimed to evaluate the analgesic effect of 300 mg gabapentin or 75 mg pregabalin in reducing postoperative endodontic pain compared with a placebo. Methods: Ninety patients who needed root canal treatment with an initial numerical rating scale (NRS) pain score of > 4 (T0) were randomly divided into three groups (n=30). Patients were then administered either 300 mg gabapentin (group A), 75 mg pregabalin (group B), or a placebo (group C) 30 min prior to the start of endodontic treatment. A single operator performed single-visit endodontics, and pain was evaluated immediately after endodontic treatment (T1) and at 4 h (T2), 8 h (T3), 12 h (T4), 24 h (T5), 48 h (T6), and 72 h (T7) using the NRS. Ibuprofen/paracetamol (400 mg/325 mg) was administered as a rescue dose if needed. Results: Pregabalin performed significantly better when compared with gabapentin at all time points except at 72 h after treatment (P=0.170). The placebo group showed significantly higher pain scores than the other two groups. The percentage of pain relief was maximum for pregabalin (92.1%), followed by gabapentin (87.6%) and placebo (69.1%) at 72 h after treatment completion. Conclusion: This study showed that pretreatment with a single dose of pregabalin and gabapentin both had greater analgesic effects than a placebo. They can be effectively used to reduce postoperative endodontic pain.
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Material Modeling and Springback Prediction of Ultra Thin Austenitic Stainless Steel Sheet
Rahul K. Verma,Satoko Murakoso,Kwansoo Chung,Toshihiko Kuwabara 한국소성가공학회 2010 기타자료 Vol.2010 No.6
The constitutive model with combined isotropic-kinematic hardening along with hardening stagnation (or permanent softening) [Verma, Kuwabara, Chung, Haldar: Int. J. Plasticity (submitted)] was used here for modeling the tension-compression behaviors of a 0.1 mm thick austenitic stainless steel sheet (SUS304), which was observed in a recent work [Kuwabara and Murakoso: Proc. CIRP 2010 Conf. (submitted)]. Springback was also experimentally measured for a shallow drawn rectangular cup here and it was verified using the above model. It was found that this model can successfully predict the Bauschinger effect and hardening stagnation. As for springback, it was found that in this particular case it depends on, other than the material model, factors like boundary conditions, in the finite element analysis (FEA), during unloading. It was also observed that incorporation of the Bauschinger effect and permanent softening is a key for accurate springback prediction and, therefore, the present model performs better than the one which is based only on isotropic hardening without any hardening stagnation.
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DEVELOPMENT OF A HIGH SPEED CCD CAMERA SYSTEM FOR THE OBSERVATION OF SOLAR Ha FLARES
VERMA V. K.,UDDIN WAHAB,GAUR V. P. The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1
We have developed and tested a CCD camera (100 $\times$ 100 pixels) system for observing Ha images of the solar flares with time resolution> 25 msec. The 512 $\times$ 512 pixels image of CCD camera at 2 Mpixels/sec can be recorded at the rate of more than 5 frame/sec while 100 $\times$ 100 pixels area image can be obtained 40 frames/sec. The 100 $\times$ 100 pixels image of CCD camera corresponds to 130 $\times$ 130 arc - $sec^2$ of the solar disk.
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SnP<sub>3</sub>/Carbon Nanocomposite as an Anode Material for Potassium-Ion Batteries
Verma, Rakesh,Didwal, Pravin N.,Ki, Hyeong-Seo,Cao, Guozhong,Park, Chan-Jin American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.30
<P>New anode materials with large capacity and long cyclability for next-generation potassium-ion batteries (PIBs) are required. PIBs are in the initial stage of investigation and only a few anode materials have been explored. In this study, for the first time, an SnP<SUB>3</SUB>/C nanocomposite with superior cyclability and rate performance was evaluated as an anode for PIBs. The SnP<SUB>3</SUB>/C nanocomposite was synthesized by a facile and cost-effective high-energy ball-milling technique. The SnP<SUB>3</SUB>/C electrode delivered a first reversible capacity of 410 mAh g<SUP>-1</SUP> and maintained 408 mAh g<SUP>-1</SUP> after 50 cycles at a specific current of 50 mA g<SUP>-1</SUP>. After 80 cycles at a high specific current of 500 mA g<SUP>-1</SUP>, a high capacity of 225 mAh g<SUP>-1</SUP> remained. From a crystallographic analysis, it was suggested that the SnP<SUB>3</SUB>/C nanocomposite underwent a sequential and reversible conversion and alloying reactions. The excellent cycling stability and rate capability of the SnP<SUB>3</SUB>/C electrode were attributed to the nanosized SnP<SUB>3</SUB> particles and carbon buffer layer, which supplied channels for the migration of K-ions and mitigated the stress induced by a large volume change during potassiation/depotassiation. In addition, a full cell composed of the SnP<SUB>3</SUB>/C nanocomposite anode and potassium Prussian blue cathode exhibited a reversible capacity of 305 mAh g<SUP>-1</SUP> at a specific current of 30 mA g<SUP>-1</SUP> and retained 71.7% of the original capacity after 30 cycles. These results are important for understanding the electrochemical process of the SnP<SUB>3</SUB>/C nanocomposite and using the SnP<SUB>3</SUB>/C as an anode for PIBs.</P> [FIG OMISSION]</BR>
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Two stage deformation modeling for DP 780 steel sheet using crystal plasticity
Verma, R. K.,Biswas, P.,Kuwabara, T.,Chung, K. Elsevier Science B.V., Amsterdam. 2014 Materials science & engineering. properties, micro Vol.604 No.-
Proper analysis of non-proportional plastic deformation is important for the successful prediction of failure and springback in sheet metal forming of ultra-high strength steels. In this work, a crystal plasticity finite element was applied to analyze the two-stage deformation behavior of a dual phase (DP 780) steel. It was found to be possible to predict the cross-effect observed during the two-stage deformation fairly accurately using the model. It was further felt that accounting for the path dependency of dislocation evolution would still improve the simulation accuracy. (C) 2014 Elsevier B.V. All rights reserved.
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