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Sang Hyeop Lee,Man Ho Kim,이석 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.2
In 2016, the 4th industrial revolution, represented by hyper-connected and hyper-intelligent technologies, began, and the global automobile industry is now focusing on the development of smart cars, such as driverless vehicles, connected vehicles, and electric vehicles. In particular, as electric vehicles with autonomous driving features are to be manufactured and sold, the precise prediction of driving distances has become more important. If the actual driving distance is shorter than the prediction of the available driving distance, the autonomous vehicle will stop on the way to its destination. Moreover, the route for electric vehicles should be determined by considering the location of charging stations and available driving distance. Existing studies about the expected driving distance do not appropriately reflect all of the various circumstances, components, and variables, thus restricting their predictive performance. In particular, current methods do not precisely predict the running resistance of electric vehicles, or changes in driving distance caused by the use of electrical functions in such vehicles. Thus, a vehicle energy model for predicting the exact driving distance of an electric vehicle is described in this paper, considering the driving speed, road status, tire pressure, temperature, driving altitude, regenerative braking, and other factors. Finally, the proposed model for predicting the driving distance of electric vehicles was confirmed to be feasible by an in-vehicle test on real roads.
( Seung-hyeop Nam ),( Chi-heum Cho ),( Sang-hoon Kwon ),( So-jin Shin ),( Tae-kyu Jang ),( Hye-won Chung ),( Seung-mee Lee ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Objective: To compare the operative outcomes of patients undergoing either robotic (RH) or laparoscopic single-site hysterectomy (LH) in benign gynecological diseases. Methods: This is a retrospective study comparing perioperative outcomes of RH and LH in benign gynecological diseases including leiomyoma, adenomyosis, carcinoma in situ of cervix and endometrial hyperplasia. Patient demographic data and operative data were abstracted from the electronic charts. Parameters for comparison included total operation time, postoperative hospital stay, conversion and complication. Results: One hundred patients underwent LH between December 2011 and April 2013 and three hundreds patients underwent RH February 2014 to August 2017 at Keimyung University, Daegu, Korea. No significant differences were found in terms of age, body mass index (BMI) and uterus weight. Operative time was similar: 98.3 minutes in RH and 80 in LH. Estimated blood loss was also similar: 100ml in both groups. However, there were 2 cases of conversion in LH when there was no case of conversion in RH. Postoperative hospital stay was 2.8 days in RH and 3 days in LH. No intraoperative complications occurred in both groups. Postoperative complications were 0.65% in RH and 4.9% in LH. Conclusion: This single center experience presents that RH is safe and feasible surgical approach in benign gynecological diseases with comparable outcomes while RH overcomes technical limitations of LH.