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ON A RECURRENCE RELATION OF K-MITTAG-LEFFLER FUNCTION
Dhakar, Virendra Singh,Sharma, Kishan Korean Mathematical Society 2013 대한수학회논문집 Vol.28 No.4
The principal aim of this paper is to investigate a recurrence relation and an integral representation of k-Mittag-Leffler function introduced earlier by Dorrego and Cerutti [2] and several special cases have also been discussed.
Experimental investigation on effects of dielectric mediums in near-dry electric discharge machining
Krishnakant Dhakar,Akshay Dvivedi,Amit Dhiman 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.5
A dielectric fluid plays a significant role on the machining efficiency of Electric discharge machining (EDM). Two phase (liquid-air) dielectric medium was utilized in near-dry (EDM). It is an environmentally friendly process. The present article reports the effect of different dielectric mediums on responses of near-dry EDM. Dielectric mediums used for experimentation were water-air, EDM oil-air and glycerin-air mixtures. The process parameters selected for experimentation were current, duty factor, flushing pressure and lift. Material removal mechanism of near-dry EDM is investigated using imaging techniques. Dielectric fluid with higher viscosity and higher Prandtl number provided better results than fluids with lower viscosity. The results reveal that the Material removal rate (MRR) with glycerin-air dielectric medium is about three-times higher than other dielectric medium used with negligible recast layer. The tool wear rate is negligible in near-dry EDM in relation to all the dielectric mediums.
Filtered Clustering Based on Local Outlier Factor in Data Mining
Vishal Bhatt,Mradul Dhakar,Brijesh Kumar Chaurasia 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.5
In this paper, the impact of k-means and local outliner factor on data set is studied. Outlier is the observation which is different from or inconsistent with the rest of the data. However, the main challenges of outlier detection are increasing complexity due to variety of datasets and size of dataset. To evaluate the outlierness and catch similar outliers as a group are also issues of this technique. The concept of LOF(Local Outlier Factor) is presented in this work. The paper describes comparative study of five different methodologies using K-means as the base algorithm along with the various distances method used in finding the dissimilarities between the objects hence to analyze the effects of the outliers on the cluster analysis of dataset in data mining.
Standardization of grafting technique in Kusum [Schleichera oleosa (Lour.) Oken]
Sarkar Pradip Kumar,Sinha Animesh,Dhakar M. K.,Das Bikash,Bhatt B. P. 한국산림과학회 2023 Forest Science And Technology Vol.19 No.1
The species, Schleichera oleosa (Kusum), holds an important place in the livelihood of tribal farmers in eastern region of India. It is getting popular due to its ethnobotanical values and its potential use as host plant for lac production. Its natural population and genetic variability is declining at faster rate due to deforestation and human interventions. Mass production of Kusum seedlings is a major challenge and moreover, auto-generation of heterozygous nature in plants calls for long term experiments for its genetic improvement which require huge monetary investments. Moreover, the factors like low quality and quantity planting materials and the problem of restricted growth in plants raised from seeds hinder the interest of the farmers. Hence, clonal propagation through grafting could be an option. The scientific knowledge on application and standardization of various approaches like girdling of scionstick branches, age of mother plant, rootstocks, etc. of Kusum are extremely limited. Keeping these in view, an experiment was conducted during 2018–2021 to standardize grafting technique in Kusum. The result revealed that grafting methods affected the graft’s success significantly. Cleft grafting was found to be the most successful (72.38% graft) than veneer grafting (64.46%). Moreover, the scions collected from tree aged <15 years showed maximum success in grafting (upto 86.23%). This study revealed the importance of girdling of scionstick branches, girdling age (3months), girdling-ring thickness (6–8mm), and selection of two years old rootstock to maximize graft success upto 86.25% in Kusum. Furthermore, season also play an important role in successful grafting. The period from April to June was the best time for grafting with 73.31% success.