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RISS 인기검색어
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- 저자 : Kashyap Yogesh (검색결과 2 건)
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Sandeep Kashyap,Yogesh Diwan,Shweta Mahajan,Deepa Diwan,Mukand Lal,Randhir Chauhan 대한고관절학회 2019 Hip and Pelvis Vol.31 No.1
Purpose: Corona mortis is an abnormal arterial or venous anastomosis between the external iliac and the obturator system of vessels and may cause significant hemorrhage during pelvi-acetabular fracture surgeries, hernia repair and laparoscopic gynecological procedures. Previous studies have estimated a prevalence of corona mortis between 34% and 70%. This cadaveric study was conducted to estimate the prevalence of corona mortis in the North Indian population. Materials and Methods: Twelve cadavers (24 hemipelvises; 11 males and 1 female) with a mean age of 68 (range, 54-82) years were included in this study. Results: Corona mortis was observed in 14 hemipelvises (58.3%). A total of 19 (79.2%) vascular anastomoses of diameter greater than 1 mm were observed; 5 hemipelvises (20.8%) had corona mortis on the right side, 9 hemipelvises (37.5%) on the left side and bilateral in 5 (41.7%) cases. Two hemipelvises (8.3%) had an arterial connection. An aberrant obturator artery was observed in 1 (4.2%) hemipelvis. A venous connection was found in 14 specimens (58.3% of hemipelvises). The average distance of the connecting vein from the symphysis pubis was 41 (35-70) mm. A vessel diameter of greater than 4 mm was observed in 4/24 (16.7%) of hemipelvises. Conclusion: The frequency of venous corona mortis was higher than arterial corona mortis and the majority (83.3%) were small calibre (<4 mm). The presentation pattern and the number of arterial or venous anastomoses were different in the majority of hemipelvises and dissimilar in both hemipelvises of the same cadaver in the majority of cases.
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A complete 3D map of Bell Glasstone spatial correction factors for BRAHMMA subcritical core
Shukla Shefali,Roy Tushar,Kashyap Yogesh,Shukla Mayank,Singh Prashant 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.9
Accelerator driven subcritical systems have long been discussed as facilities which can be used for solving the nuclear waste problem. The physics of these systems is very different from conventional reactors and new techniques had to be developed for reactivity monitoring. One such technique is the Area Ratio Method which studies the response of a subcritical system upon insertion of a large number of neutron pulses. An issue associated with this technique is the spatial dependence of measured reactivity which is intrinsic to the sub criticality of the system since the reactor does not operate on the fundamental mode and measured reactivity depends on the detector position. This is generally addressed by defining Bell-Glasstone spatial correction factor. This factor upon multiplication with measured reactivity gives the correct reactivity which is independent of detector location. Monte Carlo Methods are used for evaluating these factors. This paper presents a complete three dimensional map of spatial correction factors for BRAHMMA subcritical system. In addition, the dataset obtained also helps in identifying detector locations where the correction factor is close to unity, thereby implying no correction if the detector is used at those locations. © 2022 Korean Nuclear Society, Publish
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