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선형 등가정하중을 이용한 비선형 거동 구조물의 최적설계(Ⅱ) - 구조예제 -
박기종(Ki-Jong Park),박경진(Gyung-Jin Park) 대한기계학회 2005 大韓機械學會論文集A Vol.29 No.8
In part I of this paper Nonlinear Response Optimization using Equivalent Static Loads (NROESL) method/algorithm is developed to conduct optimization for nonlinear behavior structures. The method/algorithm is also verified to show its convergency and optimality. In this present paper, the NROESL algorithm is applied to several structural problems with geometric and/or material nonlinearity. Conventional optimization with sensitivity analysis using the finite difference method is also applied to the same examples. The results of the optimizations are compared. The proposed method is very efficient and derives good solutions.
마찰면압 및 온도 특성을 고려한 수동변속기 싱크로나이저 링의 개발
박기종(Ki-Jong Park),임채홍(Chaehong Lim),김정준(Jungjune Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The frictional surface pressure and temperature on a synchronizer ring are the most important factors in the manual transmission synchronizer system in terms of its functionality and durability aspect. In initial design stage, a practical analysis procedure is developed to predict the effects of the surface temperature or pressure on the synchronizer ring. The stress analysis. thermal analysis and their coupled analysis are involved in the process. According to the procedure. the analyses are performed and the results are discussed. PV value of the theory about energy loss rate is introduced to understand the frictional surface pressure. Shape optimization of the synchronizer ring is also carried out to minimize the PV value on the contact surface between a synchronizer ring and cone. The optimization results are discussed.
이기종 ( Ki Jong Lee ),서지현 ( Ji Hyun Suh ),안영 ( Young Ahn ),하승혜 ( Sung Hae Ha ),박주상 ( Ju Sang Park ),장은정 ( Eun Jeong Jang ),박상종 ( Sang Jong Park ),김상중 ( Sang Jung Kim ),박상운 ( Sang Woon Park ),백현욱 ( Hyun 한국정맥경장영양학회 2011 한국정맥경장영양학회지 Vol.4 No.1
Purpose: In Korea, the prevalence of metabolic syndrome has increased. The relationship between metabolic syndrome, adiponectin, and dietary components is widely known. However, the relation between cytokine and dietary components is not yet well studied in Korea. Methods: Five hundred and ninety-six Korean adults between 30 and 59 years of age were recruited by advertisement to the Bundang Jesaeng General Hospital (BJGH), and those not taking regular medications and without diagnoses of fulminant disease were included. Data was collected on anthropometric measurements, diagnostic parameters for metabolic syndrome (MetS), and 3-day dietary intakes from individuals in the study. Results: Serum adiponectin level was positively correlated with serum HDL-cholesterol level and was negatively correlated with BMI, waist circumference, and systolic and diastolic blood pressure. Intake of dietary fiber was high in the high-adiponectin group. Conclusion: High-fiber diet and adiponectin can be helpful for improving metabolic syndrome. (JKSPEN 2011; 4(1):16-20)