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Optimization and Validation of Microalgal Growth Condition by Response Surface Methodology (RSM)
Vivek P. Pankaj,Mamta Awasthi 보안공학연구지원센터 2015 International Journal of Bio-Science and Bio-Techn Vol.7 No.1
Microalgae biofuels may provide a viable alternative to fossil fuels which has received considerable interest now a days, but if microalgae biofuel production is to be economically viable and sustainable to mitigate the energy crises. Although there is much excitement about the potential of microalgae biofuels, much work is still required in the field. So further optimization of growth conditions are needed to make a different sources which provide cost-effective and sustainable means of native microalgae growth for biofuel production. This paper shows that the optimization of environmental condition i.e. Temperature, pH and light period for the growth of native microalgae sp. for biofuel production and validation of experimental model by using response surface methodology (RSM).
Enhancement of Spectrum Efficacy using Cognitive Radio Networks
Vivek Kukreja,Shailender Gupta,Bharat Bhushan,Poonam Mittal,C. K. Nagpal 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.2
Spectrum is the most valuable and scarce resource for every wireless application. Due to the scarcity of the spectrum other alternatives are also being searched. Cognitive Radio (CR) technology is one such alternative which has gained popularity in the recent times. It has been established from various researches that the allocated band is not in use for all the time by the licensed user or as Primary Users (PUs). The Cognitive Radio users also called as Secondary Users (SUs) communicate using unlicensed band or by using the idle licensed band of primary users opportunistically. This paper evaluates the performance of routing protocols by varying concentration level of PU and SU. We have also investigated the impact of time given by PU’s to SU’s for data transfer. For performing the above task, a simulator is designed in MATLAB-7.01. The results show that the performance of routing protocols improves significantly as the number of PUs and allowable time given by PU’s to SU’s increases.
Seroma Formation after Breast Cancer Surgery: What We Have Learned in the Last Two Decades
Vivek Srivastava,Somprakas Basu,Vijay Kumar Shukla 한국유방암학회 2012 Journal of breast cancer Vol.15 No.4
Formation of a seroma most frequently occurs after mastectomy and axillary surgery. Prolonged drainage is troublesome as it increases the risk for infection and can significantly delay adjuvant therapy. Seroma has been defined as serous fluid collection under the skin flaps or in the axillary dead space following mastectomy and/or axillary dissection. Because the true etiology of a seroma is unknown, a multifactorial-causation hypothesis has been accepted. Surgical factors include technique, extent of dissection and the surgical devices used for dissection. Obliteration of dead space with various flap fixation techniques, use of sclerosants, fibrin glue and sealants, octreotide, and pressure garments have been attempted with conflicting results and none have been consistent. Early movement of the shoulder during the postoperative period may increase the formation of seroma, although delayed physiotherapy decreases the formation of seroma. A detailed analysis of the use of drains showed that use of single or multiple drains, early or late removal, and drains with or without suction are not significantly different for the incidence of seroma. Although there is evidence for reduced seroma formation after early drain removal, very early removal within 24 hours seems to increase formation of seroma. No patient or tumor factors seem to affect seroma formation except body mass index and body weight. Consensus is lacking among studies/trials with different groups producing conflicting evidence. Besides a few established factors such as body mass index, the use of electrocautery for dissection, early drain removal, low vacuum drains, obliteration of dead space, and delayed shoulder physiotherapy, most of the hypothesized causes have not been demonstrated consistently. Thus, seroma remains a threat to both the patient and surgeon. Recurrent transcutaneous aspiration remains the only successful management.
A Novel Imaging System for Removal of Underwater Distortion using Code V
Vivek Maik,Stella Daniel,A. Chrispin Jiji 대한전자공학회 2017 IEIE Transactions on Smart Processing & Computing Vol.6 No.3
Images obtained from underwater are usually degraded due to the environmental conditions. Some of the typical degradation factors include turbidity and color degradation. These degradations can be attributed to the absorptive and scattering properties of underwater degradation in terms of optical parameters, such as modulation transfer function (MTF), optical transfer function (OTF),point spread function (PSF), and color constancy. In this paper, we use the CODE V optical simulation software to mimic underwater conditions and model the imaging platform, thereby studying various parameters, such as PSF and MTF, and we use the PSF to remove the underwater turbidity. Experimental results show increased performance with the algorithm, compared to other existing methods.
Vivek V. Gupta,Nagesh Bhat,Kailash Asawa,Mridula Tak,Salil Bapat,Pulkit Chaturvedi 질병관리본부 2015 Osong Public Health and Research Persptectives Vol.6 No.2
Objectives: A study was conducted with the purpose to assess the knowledge and attitude towards informed consent among private dental practitioners in Bathinda City, Punjab, India. Methods: A cross-sectional survey was conducted among all private dental practitioners in Bathinda City. A self-administered structured questionnaire consisting of 14 items was used to assess their knowledge and attitude regarding informed consent. The response format was based on a 3-point Likert scale. Oneway analysis of variance, independent sample t test, and stepwise multiple linear regression analysis were utilized for statistical analysis. Confidence level and level of significance were set at 95% and 5%, respectively. Results: The mean scores for knowledge and attitude were 19.37 ± 31.82 and 9.40 ± 1.72, respectively. Analysis revealed that qualification and years of experience was statistically significant among both dependent variables (p ≤ 0.05). Conclusion: An unbalanced knowledge of informed consent among the current dentists has suggested the need for awareness programs to fill the knowledge gaps and instill positive attitudes.
Vivek Dhand,이경엽,J. Sarada Prasad,Y. Anjaneyulu 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.3
An in-house custom made high pressure adsorption/desorption unit has been designed and fabricated to study reversible hydrogen (H2) intake capacity, hysteresis, kinetics, plateau pressure of various nanomaterials, zeolites and metallic compounds, in the pressure range of 1≤P≤150 atm. The unit has been used to estimate H2 intake capacity of carbon nanofibers prepared by flame synthesis in the absence of catalyst. H2 adsorption studies have been carried out in the pressure range of 25–100 atm at 297 K. The maximum H2 intake capacity has been observed to be 3.7 wt% at 100 atm.
Vivek K. Bajpai,Sora Kang,Houjuan Xu,이순구,백광현,강선철 한국식물병리학회 2011 Plant Pathology Journal Vol.27 No.3
Diseases caused by plant pathogenic bacteria constitute an emerging threat to global food security. Xanthomonas is a large genus of Gram-negative bacteria that cause disease in several host plants leading to considerable losses in productivity and quality of harvests. Despite the ranges of controlling techniques available, the microbiological safety of economically important crops and crop plants including fruits and vegetables continues to be a major concern to the agriculture industry. On the other hand, many of the currently available antimicrobial agents for agriculture are highly toxic, non-biodegradable and cause extended environmental pollution. Besides, the use of antibiotics has provoked an increased resistance among the bacterial pathogens and their pathovars. Thus, novel efficient and safe remedies for controlling plant bacterial diseases are necessary. There has been an increasing interest worldwide on therapeutic values of natural products such as essential oils,hence the purpose of this review is to provide an overview of the published data on the antibacterial efficacy of essential oils that could be considered suitable for application in agriculture as biocontrol measures against plant pathogenic bacteria of Xanthomonas species. The current knowledge on the use of essential oils to control Xanthomonas bacteria in vitro and in vivo models has been discussed. A brief description on the legal aspects on the use of essential oils against bacterial pathogens has also been presented. Through this review, a mode of antibacterial action of essential oils along with their chemical nature and the area for future research have been thoroughly discussed.
Vivek K. Bajpai,윤정인,Seak Won Choi,강선철 한국식물병리학회 2010 Plant Pathology Journal Vol.26 No.2
This study was undertaken to isolate and to identify a fungal pathogen Monilinia sp. KV-27 associated with apple anthracnose. Rotted Fuji apples were used for the isolation of the fungus. The infected tissues were sterilized with 70% ethanol, washed with sterilized distilled water and were transferred to 50 ml containing potato dextrose broth (PDB) flasks. The peripheral hyphae of the fungal colony which developed from the infected tissues were isolated on to potato dextrose agar (PDA). On PDA plates the fungus grew well at 25oC and occupied more than half of a 9 cm petri dish within 5days. The fungal cultures on PDA were used for morphological observation and identification of the fungus. Conidiophores were produced on the gray to whitish sporodochial structures scattered on PDA plates. These conidiophores gave rise to chains of conidia, which were branched and easily detached in water. These structures were dark brown to black and consisted of hyphal masses. Conidia produced on PDA plates were hyline or light colored, lemon shaped or ellipsoidal (10-13×8.5-11μm) in size.