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퍼지제어에의한 로보트 매니퓰레이터의 궤도추종에 관한 연구
조민현,선양래 慶熙大學校 1994 論文集 Vol.23 No.-
Robotic system as one of the major part of dynamic system is often subject to disturbance and parameter variation causing deteriorated performance or unstable response. In this study, two input variables as error and error change rate has been adopted along with Lukasiwicz logic and nonlinear defuzzification algorithem. This algorithm has been applied to pragmatics 6-DOF robot and tracking simulation has been conducted. The fuzzy controller developed showed better performance and stability compared to PD controller despite of their similarity.
양경무,권일훈,조갑래,서중석 大韓法醫學會 1999 대한법의학회지 Vol.23 No.1
Adult polycystic kidney disease is a genetic disease characterized by bilateral multiple renal cysts and is transmitted as an autosomal dominant traits. The disease usually manifests in the fourth decade of life. The affected patients usually die with end stage renal failure, cardiovascular assaults and infection etc. Cardiovascular assaults include ruptured berry aneurysm, spontaneous intracranial hemorrhage, acute myocardial infarction, dissecting aortic aneurysm and hypertensive heart failure. Fatal intracranial hemorrhage and hypertensive heart failure occur in 15% and 2% of patients, respectively. Genetically-dater-mined structural weakness in the arterial wall have been suggested as a possible factor in the genesis of berry aneurysm. We have experienced three autopsy cases with cardiovascular causes of sudden death. Two cases have intracranial hemorrahage (1 berry aneurysm and 1 intracerebral hemorrhage) and the remaining one is dead with hypertensive cardiomyopathy. All of them are aged over 40 years and associated with polycystic liver disease. Histologically, myriad cysts of enlarged bilateral kidney are lined by single layer of cuboidal cells with focal hyperplastic epithelial configuration. Diffusely scattered liver cysts are also lined by flat to cuboidal epithelium and often associated with portal fibrosis.
Jo, Kyung Il,Yang, Na-Rae,Jeon, Pyoung,Kim, Keon Ha,Hong, Seung-Chyul,Kim, Jong Soo The Korean Neurosurgical Society 2018 Journal of Korean neurosurgical society Vol.61 No.1
Objective : The objectives of this study were to evaluate the immediate and long-term efficacy and safety of coil embolization for large or giant aneurysms. Methods : One hundred and fifty large or giant aneurysm cases treated with endovascular coil embolization between January 2005 and February 2014 at a single institute were included in this study. Medical records and imaging findings were reviewed. Statistical analysis was performed to evaluate prognostic factors associated with major recurrence (major recanalization or rupture) and delayed thromboembolism after selective coil embolization. Results : Procedure-related symptomatic complications occurred in five (3.3%) patients. The mean clinical and radiological follow-up periods were 38 months (range, 2-110) and 26 months (range, 6-108), respectively. During the follow-up period, the estimated recurrence rate was 4.6% per year. Multivariate analysis using Cox regression showed the degree of occlusion to be the only factor associated with recurrence (p=0.008, hazard ratio 3.15, 95% confidence interval 1.34-7.41). The patient's history of rupture in addition to the size and location of the aneurysm were not associated with recurrence in this study. Delayed infarction occurred in eight cases, and all were incompletely occluded. Conclusion : Although immediate postprocedural safety profiles were reasonable, longterm results showed recanalization and thromboembolic events to occur continuously, especially in patients with incomplete occlusion. In addition, incomplete occlusion was associated with delayed thromboembolic complications. Patients with incomplete occlusions should be followed carefully for delayed recurrence or delayed thromboembolic events.
독립지주 영농병행 태양광 발전 및 고부가가치 작물 재배 실증을 통한 경제성 분석 연구
조건영(Jo Geonyoung),유정학(Yu Jeonghak),박정재(Park Jung-jae),양나래(Yang Na-rae),임철현(Lim Cheol-hyun),박태식(Park Tae-sik) 한국태양에너지학회 2023 한국태양에너지학회 논문집 Vol.43 No.1
This study entailed an economic feasibility analysis for a 100 kW agrophotovoltaic model based on the empirical data of a 20 kW independent pillar type agrophotovoltaic system and crop growth evaluation data. The blueberry growth investigation indicated the absence of any significant difference in transverse diameter, longitudinal diameter, sugar content, and acidity of the experimental and control groups. However, the sugar content of the second harvested blueberries was higher than that of the first harvest. In addition, the number of fruit set in the experimental group was 663.1, and that in the control group was 767.1. This is attributable to the delayed blooming time of blueberry flowers owing to the decrease in solar radiation caused by the shading of the agrophotovoltaic modules. The average income per 20a of blueberries, a high value-added crop, was calculated to be 20,517,000 won. The average annual power generation of 100 kW agrophotovoltaic, total generation cost, and net profit were calculated to be 130,481 kWh, 22,313,000 won, and 9,872,000 won, respectively. In addition, the revenue from the high-value-added crops of the agrophotovoltaic system was 20,517,000 won, and the net profit through power generation was calculated as 9,872,000 won, thereby indicating higher profits through crops.
조영태 ( Young Tae Jo ),조래현 ( Rae Hyeon Jo ),설동화 ( Dong Hwa Seol ),양현 ( Hyeon Yang ),정지효 ( Ji Hyo Jung ),박정훈 ( Jeong Hun Park ) 한국환경분석학회 2015 환경분석과 독성보건 Vol.18 No.4
Laser Induced Breakdown Spectroscopy (LIBS) has been introduced as a type of analytical equipment to determine elements on the surface of various materials. In this study, standard and sample soils were molded to make a pellet for LIBS analysis. The soils were also digested with acids for ICP analysis. Accuracies ranging between 86.5% and 119.9%, an RSD of 12.3%, an LOD of 6.09 mg/kg, and an LOQ 19.41 mg/kg resulted from the analysis of copper in soils using LIBS. Correlations (R2) of LIBS with ICP-aqua regia digestion and with ICP-total digestion analysis concentrations were over 0.96 for 28 samples. The total analytical time for the LIBS method was 385 min, which was 43.4% shorter than for the ICP-OES method (680 min). For the analysis of copper in soils, LIBS can be used for on-site detection without chemical preparation.