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RISS 인기검색어
- 검색키워드
- 저자 : Vijay Shankar S. (검색결과 2 건)
- 무료
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Benign Triton Tumor: A Rare Entity in Head and Neck Region
Krishnappa Amita,S. Vijay Shankar,Kuchangi C. Nischal,Haleuoor B. Basavaraj 대한병리학회 2013 Journal of Pathology and Translational Medicine Vol.47 No.1
Benign triton tumors (BTT) are very rare lesions composed of mature skeletal muscle and neural tissue. We report a case of a 14-year-old boy who presented with asymptomatic swelling of the chin over an 18-month duration which increased gradually to involve the left side of the lower lip. Clinically, a diagnosis of neurofibroma was made. Excisional biopsy confirmed the diagnosis of a BTT. Having an affinity for large nerve trunks like the brachial and sciatic, these tumors rarely occur in the head and neck region. When they do, they may involve the large central cranial nerve trunk and present as intracranial masses or involve the smaller peripheral nerve twigs and present as asymptomatic skin nodules, of which only four cases involving peripheral nerves are reported in the English literature. Here, we report the fifth documented case of a BTT involving the mental branch of the trigeminal nerve. A brief review of the literature is also provided.
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Design and Implementation of Comprehensive Converter
Sathyaseelan B.,Vijay Shankar S.,Suresh K.,Saravanan R. 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6
This novel Comprehensive Converter (CC) proposes multiple power conversion approach for step-up and step-down processes in AC-DC, DC-DC, AC-AC and DC-AC conversions. This versatile converter is designed by using power electronics switches, for AC-DC & AC-AC conversions thyristors are preferred, whereas DC-DC & DC-AC operations require both turn-On and turn-Off control so transistors (IGBT) is the most suitable switch. Conversion in all the stages can be controlled by a digital controller according to the requirement. All four conversions can perform step-up as well as step-down process, so design of inductor and capacitor values are very much important. All four modes of operations 4 thyristor based transistors and two diode based transistors are used to ensure switching operations. Novelty of the research work is conversion of power in all the modes can be bidirectional and also in single stage process, but in the existing systems of power conversions is an unidirectional process. Proposed single stage power conversion has more effi ciency because of low switching losses. This proposed converter was designed by using mathematical analysis, tested at simulation level and verifi ed in the real time experiment
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