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비트-시리얼 기반 데이터플로우 수정을 이용한 ARIA-128 하드웨어 구현
조정훈(Junghoon Cho),조중호(Joongho Jo),박종선(Jongsun Park) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
This paper proposes implementation of ARIA-128 encryption hardware using datapath serialization and algorithm modification based on bit-serial technique. After the analysis of round function and key scheduler of ARIA hardware, datapath bit reduction and architecture modification were successfully applied to the bit-serial ARIA hardware. Proposed ARIA hardware is synthesized in 65nm CMOS process, and showed Compared to previous works which implemented ARIA hardware, proposed work showed 82% and 27% area efficiency compared to completely bit-parallel and 32bit datapath ARIA hardware, respectively.
Main results of the Korea National Hospital Discharge In-depth Injury Survey, 2004-2016
Sung Ok Hong,Boae Kim,Joongho Jo,Yunhyung Kwon,Yeon-Kyeng Lee,Youngtaek Kim 한국역학회 2020 Epidemiology and Health Vol.42 No.-
OBJECTIVES: The purpose of this study was to estimate the incidence of injuries and to identify their causes by classifying injuries according to various categories including age, sex, mechanism of injury, body parts injured, and place of injury. METHODS: This study used data from the Korea National Hospital Discharge In-depth Injury Survey (KNHDIS) from 2004 to 2016. The KNHDIS is conducted annually by the Korea Centers for Disease Control and Prevention, and its survey population includes all hospitalized patients discharged from medical institutions that have 100 or more beds, such as hospitals, general hospitals, and secondary community health centers. The number of injured cases is weighted and estimated using the mid-year estimated population of each year. RESULTS: The injury discharge rate steadily increased since 2004 (1,505 per 100,000 population in 2004, 2,007 per 100,000 population in 2016) and most injuries were unintentional (annual average of 94.7%). On average, during the 13-year study period, the injury rate for males was 1.5 times as high as for females. The 2 main causes of injury were consistently traffic accidents and falls. Notably, the rate of injuries resulting from falls rose by 1.7-fold from 463 to 792 per 100,000 people, and exceeded the rate of traffic accidents in 2016. CONCLUSIONS: The incidence of injuries steadily increased after the survey was first conducted, whereas mortality resulting from injuries mostly remained unchanged. This suggests that effective strategies and interventions should be reinforced to reduce unintentional injuries.
서병연(Byoungyoun Seo),이기양(Keeyang Lee),정광기(Kwangki Jung),조중호(Joongho Jo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
최근 자동차의 성능향상에 따라 브레이크용 마찰재는 고기능 특성이 요구되는 한편, 환경문제 대두로 인하여 친환경 마찰재를 필요로 하고 있다. 본 연구의 목적은 유해물질인 안티몬 화합물, 세라믹섬유 그리고 중금속을 사용하지 않으며, 소음 및 진동특성이 우수한 NAO계 마찰재와 제동특성 및 열적 안정성이 우수한 Low Steel계 마찰재의 장점을 조합한 친환경 퓨전형 마찰재 개발을 목표로 하고 있다. 유해물질인 안티몬화합물 및 세라믹 섬유는 금속화합물 및 광물섬유로 대체개발 완료하였으며, 성능 및 NVH향상을 위해서 Steel함유 최소화, 연삭제 조절, 수지종류 변경등 실험계획법을 통해 최적 배합비 조건을 선정하였다. 개발된 마찰재 특성을 평가하기 위하여 경도, 압축 변형량등 물리적 특성, 마찰계수 및 마모특성등 제동성능 특성 그리고 소음진동과 관련된 NVH 특성을 평가하였다. 평가결과 경도, 압축 변형량등 물리적 특성은 현재 사용중인 마찰재와 동등수준이었으며, 마찰계수, Fade특성, 마모특성 등 제동 성능, NVH특성 또한 기존 사용 마찰재와 유사한 특성을 나타내었다.