회전구조물의 진동 해석 및 실험

박정훈,유홍희,Park, Jung-Hun,Yoo, Hong-Hee 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.2

Comparative study on the analysis and experiment for the vibration of a rotating cantilever structure was made in this paper. Analysis results were obtained by using the modeling method which was developed in the previous work. The cross-section thickness variation due to the sensor attachment was additionally considered. In order to verify the accuracy of the analysis results, exerimental results were obtained. The analysis and experimental results were found to be in a good agreement. It was also shown that the aerodynamic and cross-section thickness variation effects significantly influenced the dynamic characteristics of the rotating structure.

수원시 수계에 분포하는 식물플랑크톤의 종조성 및 영양단계

박정훈,문병렬,이옥민,Park, Jung-Hun,Moon, Byeong-Ryeol,Lee, Ok-Min 한국조류학회(藻類) 2006 ALGAE Vol.21 No.2

Seasonal compositions, standing crops and trophic status of phytoplankton were investigated at 13 sites of Suwon-si, Gyeonggi-do from June, 2004 to March, 2005. Total of 304 taxa were found, and classified as 4 phylums 4 classes 13 orders 36 families 93 genera 246 species 47 varieties 8 forms and 3 unidentified species by Engler’s classification system. Judged by standing crops of phytoplakton, algal blooming was observed at every sampling sites except Pajang reservoir, Hagwanggyo reservoir, Suwon-cheon and Woncheon-cheon throughtout the whole study periods. While Hagwanggyo reservoir appeared to be in mesotrophic or oligomesotrophic status, most of the remaining sampling sites in Suwon-si were in eutrophic status according to trophic status index. In this study, the most abundant taxa revealed in eutrophic status were Anabaena circinalis, Pandorina morum, Scenedesmus acuminatus, and S. quadricauda as previously reported as the most abundant taxa in eutrophic status. But Navicula cryptocephala and Cyclotella stelligera, reported as the abundant taxa of mesotrophic and oligomesotrophic status, respectively, occurred in eutrophic status in this study.

초기 비틀림각을 갖는 회전 외팔보의 굽힘 진동

박정훈,유홍희,Park, Jung-Hun,Yoo, Hong-Hee 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.7

Equations of chordwise and flapwise bending motions of pretwisted rotatin cantilever beams are derived. The two motions are coupled to each other due to the pretwist angle of the beam cross section. As the angular speed, hub radius ratio, and pretwist angle vary, the vibration characteristics of the beam change. It is found that engenvalue loci veering phenomena and associated mode shape variations occur between two vibration modes due to the pretwist angle. The effect of the pretwist angle on the critical angular speed is also investigated.

A 4.4-8.1㎓, 1.76㎽ Low-Power and Low-Phase-Noise Ring Oscillator

Jung-Hun Park(박정훈),Deog-Kyoon Jeong(정덕균) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

고속비행체 냉각을 위한 연료의 흡열분해 반응에서 제올라이트 촉매 영향연구

박정훈(Jung Hoon Park),정병준(Byeong Jun Jeong),신민창(Min Chang Shin),정지훈(Ji Hoon Jung),정병훈(Byung Hun Jeong) 한국추진공학회 2019 한국추진공학회 학술대회논문집 Vol.2019 No.11

형사절차에서의 협상과 합의 ; 형사절차상 협상제도 도입에 관한 고찰

박정훈 ( Jung Hun Park ) 한국형사정책학회 2012 刑事政策 Vol.24 No.3

Criminal procedure h as i ts prime o bjective in f inding o ut o f the substantive truth. With the notion that the ultimate goal of criminal procedure is to realize justice through the regulation of penalty that corresponds the responsibility, the criminal must get punishments equivalent to his/her responsibility by finding out the substantive truth. Agreement, a word that has an image of making a deal or compromise, seems to be an inappropriate concept in the criminal procedure. In today`s world, despite slight differences in contents, not only the Anglo-American legal system including the United States which is based on Offizialprinzip litigation system but also the continental legal system which takes a Parteienprinzip litigation structure implement the agreement system in their criminal procedure. Moreover, agreement has already become a universal phenomenon in criminal procedure of the 21st century and it is spreading worldwide. Demand for agreement is increasing in Republic of Korea as well. Nevertheless, even if the agreement system is necessary, it should not be implemented if it does not follow the judicial principle. Here lies the reason w hy e xamining t he l egitimacy of the agreement system is necessary. Examination on legitimacy of agreement system revealed agreement system as a whole is not unfair but its legitimacy depends on how the content is composed of. Above all, agreement system should be realized within the criminal law of Rechtasstaat. For this, mediators of the negotiation should be the judges. This guarantees the rights of defendant · plaintiff in the criminal procedure while getting rid of any concern about concentration of power to prosecutors when leading roles of the negotiation are given to prosecutors. Especially, the principle of innocent until proven guilty and the right to be tried in court by judges which are specified in Constitutional law should be guaranteed. The agreement system, however, must be applied only to minor offenses (For instance, crimes punished by under one year of prison time). Further more, in cases such as organized crime, drug crime, white-collar crime and corruptions of public servants, which by nature are difficult to investigate without information from insidesources, crimes eligible for agreement should be decided according to the charges. Moreover, in order to ensure defendants` rights, Compulsory lawyer policy should be introduced. Defendants should also be given the opportunity to withdraw negotiations and hold official trials before they are sentenced. The court should nullify the binding force of negotiations when new facts are discovered or there are changes in the preconditions for negotiations. It is a prerequisite to establish guidelines for punishments which are criteria of negotiations.

DNA감정체계 개선을 통한 증거능력 확보방안

박정훈 ( Jung Hun Park ) 안암법학회 2013 안암 법학 Vol.0 No.41

DNA evidence, which can be considered the most important method of scientific evidence, is essential to solving various crimes and accidents, including sexual crimes. Also, evidence obtained from DNA examination provides the most effective and admissible evidence compared to all other types of scientific evidence. Although it has been over 20 years since Korea has started conducting DNA examinations, our country lacks the standard scientific procedures, methods, and standards of DNA examinations. And Organizations that conduct examinations must also have a serious discussion on ``Chain of Custody``, which states that DNA evidence must be collected, stored, transported, and examined without contamination or damage and must preserve its ``ntegrity`` Also, each organization has different criteria and certifications necessary for selecting its DNA examiners. Furthermore, Korea doesn`t have a systematic education program to train DNA examiners. Even if DNA examiners obtain results following scientific procedures and methods, if one considers that the examination and results are conducted and analyzed by the examiner then it will be made clear that implementing a systematic education and evaluation of DNA examiners is an urgent matter. Also, since most organizations that conduct examinations are directly or indirectly related to investigative organizations, objectivity issues can be considered a potential problem. This is why organizations that conduct examinations must be independent from investigative organizations and conduct examinations objectively.

온실 재배 환경제어 시스템에서의 의사결정 지원 모듈 설계

박정훈(Jung-Hun Park),오세종(Se-Jong Oh) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.2014 No.2

본 논문에서는 한국 온실 환경에 맞춰서 최적의 환경 제어 정보를 제공해 줄 수 있는 의사 결정 지원 모듈을 제안하였다. 온실과 복합제어기에 의사 결정 지원 모듈을 적용하여 기존에 사용되던 환경 가이드라인을 확장시켜 최적의 환경 제어 데이터를 검출한다. 온실의 환경 데이터는 우선적으로 데이터베이스에 저장되고 의사 결정 지원 모듈은 온실의 환경 데이터와 생육 정보를 비교하여 Drools의 추론엔진을 통하여 각각 농가의 시설 작물에 적합한 환경 재어 데이터를 도출한다. 따라서 의사 결정 지원 모듈을 지속적으로 이용할 경우 각 농가에 적합한 최적의 환경 데이터를 제공하여 농가의 편의성 및 생산성을 극대화 할 수 있다.

Design of 32Gb/s Ground-Referenced Signaling NRZ Transmitter

Jung-Hun Park(박정훈),Deog-Kyoon Jeong(정덕균) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6

한국 근로자에서의 물리적 인자 및 근무여건과 직업성 손상 간의 관련성

박정훈 ( Jung Hun Park ),성주현 ( Joo Hyun Sung ),심창선 ( Chang Sun Sim ),이찬부 ( Chan Boo Lee ),박상진 ( Sang Jin Park ),이지호 ( Ji Ho Lee ),이충렬 ( Choong Ryeol Lee ) 한국산업보건학회 2015 한국산업보건학회지 Vol.25 No.3

Objectives: The aim of this study is to evaluate the association between physical factors, working conditions and occupational injuries among Korean workers. Methods: We used data from the 2nd Korean Working Conditions Survey, conducted in 2010. A total of 7,114 workers over 15 years of age were selected from among 10,019 Korean workers. The participants were interviewed using questionnaires. A multiple logistic regression model was used to analyze the associations among physical factors, working conditions and occupational injuries. Results: After the adjustment of socio-demographic factors, the odds ratio of injuries through physical factors such as vibration (adjusted Odds Ratio [aOR] 4.037, 95% CI 2.30-7.09), noise (aOR 4.562, 95% CI 2.64-7.89), high temperature (aOR 3.262, 95% CI 1.86-5.73), and low temperature (aOR 3.358, 95% CI 1.76-6.41) were greater in the exposed group than in the non-exposed group. The odds ratios of occupational injury(aOR 5.272, 95% CI 3.19-8.7 for very high speed work, aOR 3.303, 95% CI 1.95-5.60 for tight deadlines, and aOR 3.641, 95% CI 1.72-7.70 for not enough time to work) increased with increased work demands. Conclusions: In this study, physical factors such as vibration, noise, and high and low temperatures were significantly correlated with occupational injuries according to the increase in exposure intensity(p for trend <0.001). Also, working conditions such as high-speed work, tight deadlines and insufficient time to work showed significant associations with occupational injuries(p for trend<0.001).