한국인의 연, 망간, 알루미늄 및 실리콘의 혈중 농도

김정만,안정모,김원술,김정일,신해림,정갑열,김준연 동아대학교 산업의학연구소 2000 산업의학연구소 논총 Vol.- No.5

Blood Lead, Manganese, Aluminium and Silicon Concentrations in Korean Adults Jung Man Kim, Jung Mo Ahn, Won Sul Kim1), Jung Il Kim2), Hai Rim Shin, Kap Yeol Jung2), Joon Youn Kim Department of Preventive Medicine, College of Medicine and Industrial Medicine Research Institute. Dong-A University Department of Health Care, Handong University Sunlin Presbyterian Hotpital1) Department of Occupational Medicine, College of Medicine, Dong-A University2) 0bjectives : This study was performed to determine the reference values of blood lead, manganese, aluminium, and silicon in healthy adults. Methods : The subjects were 132 (67 male and 65 female), and classified to three age groups (≤39,40∼49, and 50≤). Hood lead, manganese and aluminium were analyzed by atomic absorption spectrophotometer, and blood silicon was analyzed by direct current plasma optical omission spectrometer. Results : Blood lead levels(geometric mean, S.D) were (3.49, 1.70) ㎍/dL in male auld (3.04, 1.65) ㎍/dL in female, but the difference is not significant, and there was no significant difference between age groups. Mean blood manganese level was 0.99±0.41㎍/dL, and there was no significant difference between sex or age groups. Mean blood aluminium level was 0.59±0.35㎍/dL and there was no significant difference between sex or age groups. Mean blood silicon level was 54.41±27.64㎍/dL in male and 43.34±23.51㎍/dL in female, and the level in male was significantly higher than that in female (p〈0.05). There was significant difference between age groups, and the oldest showed the highest level in male (p〈0.05), but no significant difference between age groups in female. Conclusions : Authors hope that this study would provide basic data for determininig reference values and evaluating health effects.

A Study on the Mythological Figures in the Poetry of W. B. Yeats

Lee, Jung-Won 국립7개대학공동논문집간행위원회 2003 人文學論叢 Vol.3 No.-

긴 작품활동 동안 예이츠의 관심의 초점은 항상 사람들에게 맞춰져 있었다. 이는 희곡이나 산문 작품에만 해당하는 말이 아니라 그의 시에도 마찬가지로 적용된다. 그의 시에 등장하는 인물 중에는 신화적 인물들이 상당수 있는데 예이츠가 정의하는 신화는 단지 신들의 이야기만이 아닌 보다 넓은 의미의 정의, 여러 세대를 두고 전해 내려온 전설적 인물들도 포함한다. 릴리안 페더는 예이츠에게 신화의 주인공들은 한 문명의 발단단계를 나타내며 그 소산물이라고 말한 바 있다. 한 시대의 특징들이 신화를 통해 전달되며 현대에 도전하는 시금석이 된다는 것이다. 예이츠의 신화적 인물들은 신화라는 단어가 일반적으로 연상시키는 그리스, 로마 신화보다도 그의 조국 아일랜드의 신화에서 나온 인물이 더 많다는 특성을 지니고 있다. 예이츠는 물론 아일랜드 인들만을 자신의 독자로 생각하고 글을 쓴 것은 아니지만 이들 인물들을 시에서 묘사함으로써 잘 알려지지 않았던 아일랜드의 문화적 유산을 성공적으로 보편화, 세계화하는 본보기를 보여주고 있다. 예이츠는 시에서 기존 신화를 단순히 인용하는 것이 아니라 자신의 필요에 맞게 한, 두 양상을 선택해 확대하고 증보하는 자유로운 상상력의 구사로 새로운 인물로 창조하는 면모를 보여준다. 또한 그에게 신화적 인물은 사라진 고대세계의 인물로만 존재하는 것이 아니라 현대사회에 재현될 수 있는 인물상으로 그려진다. 그리하여 신화적 영웅 쿠훌린은 1916년 혁명의 현장에 되살아나며 트로이의 헬렌은 그의 평생의 연인 모드 곤의 모습에 투영되어있다. 예이츠가 한 편의 시에서는 한가지 양상을 중점적으로 묘사했기 때문에 예이츠 시의 신화적 인물들은 여러 편의 시를 종합하여 고찰할 때 그 인물의 유형적 특성이 잘 드러난다. 본고에서는 사랑의 신 엥거스, 은둔현자 퍼거스, 시인 어쉰, 전사 쿠훌린, 절세미녀 트로이 헬렌의 다섯 인물의 분석을 통해 예이츠가 이들 신화적 인물들을 통해 구현하고자 했던 인간관을 살펴본다.

방사상 운전 전력계통에 대한 정전복구 시스템

정정원,이기원 경성대학교 공학기술연구소 1999 공학기술연구지 Vol.6 No.-

In this paper the hardware and algorithm of APRS(Automatic Power Reconfiguration System) are represented. These days power systems are often operated in the radial operation manner. This is due to the increase of fault current capacities as power flow go higher and loop figures of power systems become more complex. Fundamentally radial operation of power systems result in loss of reliability. So, the need to develop automatic restoration system to recover supply reliability. We develop APRS for practical application.

Enhanced Densification and Hardness of Titanium Bodies Sintered by Advanced Hydrogen Sintering Process

Jung‑Min Oh,Ja‑Geon Koo,Jae‑Won Lim 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6

A new sintering technique for enhancing a densification and hardness of sintered titanium body by supplying hydrogen wasdeveloped (Hydrogen Sintering Process, HSP). The HSP was developed by only injecting hydrogen into an argon atmosphereduring the core time. As a result, sound titanium sintered bodies with high density and hardness were obtained by the HSP. In addition, a pore size and number of the HSP specimens were smaller than those of the argon atmosphere specimen. It wasfound that the injecting hydrogen into the argon atmosphere by HSP can prevent the formation of oxide layers, resulting inenhanced densification and hardness.

On the Strengthening Effects Affecting Tensile and Low Cycle Fatigue Properties of Low-Alloyed Seismic/Fire-Resistant Structural Steels

Jung‑Ho Sim,Tae‑Yeong Kim,Jun‑Yeon Kim,Chi‑Won Kim,Jun‑Ho Chung,Joonoh Moon,Chang‑Hoon Lee,Hyun‑Uk Hong 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.2

In the present study, low carbon ferritic and bainitic steels with different contents of Mo, Ti, and Nb were designed for bothseismic and fire-resistant applications. The microstructure of steels containing 0.3 wt% Mo–0.02 wt% Nb (‘A’ hereinafter)was mainly composed of bainite. By contrast, the microstructure of steels with 0.2 wt% Mo–0.13 wt% Ti (‘B’ hereinafter)consisted of ferrite with a high density of nano-sized (Ti,Mo)-rich MX precipitates. The results showed that the bainiticmicrostructure (‘A’ steel) was quite favorable to high-temperature strength and thermal stability. The yield strength of ‘A’ steelat both room and 600 °C temperatures increased consistently with increasing thermal exposure time (600 °C/200–1000 h),since the precipitation of NbC particles occurred while maintaining bainitic ferrite platelets with a high density of dislocationsduring exposure. In the ‘B’ steel, the formation of nano-sized (Ti,Mo)-rich MX particles was effective to impededislocation movement, leading to excellent plasticity (lower yield ratio) at room temperature. However, their contributionto precipitation hardening was not so much at 600 °C, as compared to the bainitic strengthening. During low cycle fatiguetests at room temperature, the main different feature between the two steels is that the ‘A’ steel showed cyclic softeningwhile cyclic hardening was evident in the ‘B’ steel. The bainitic microstructure showed a better fatigue life due to increasedductility manifested by cyclic softening, by which dislocation cell was developed.

공동주택내 이산화질소(NO2) 및 휘발성유기화합물(VOCs) 노출에 따른 건강 위해성 평가

Jung,Soon-Won,Yang,Won-Ho,Son,Bu-Soon 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.4

Indoor air quality has become a topic of interest and concern. Especially changes in construction design and the increased use of synthetic products may result in an increasing of complaints and health effects about the quality of indoor air at home. In this study, nitrogen dioxide(NO2) and volatile organic compounds(VOCs) within new and established apartments on the basis of 4 years of building year were measured every 3 days consecutively during 60 days. We selected each 10 house in Seoul, Asan and Daegu, respectively, and produced risk numbers for hazard quotients, and predicted increases in incidence of cancer. The calculations were made for the adult with default exposure values and also made for a worst case scenario using Monte-Carlo simulation as describing the reasonable exposure(RME). Mean of Monte carlo analysis by benzene, in the construction under 4 years (male: 9.2105, female: 1.0×104) and over 4years (male: 6.8×105, female: 8.3×105) exceeded 106 of permitted standards in US EPA, RME of Monte carlo analysis. In construction under 4 years (male: 9.9×103, female: 9.6×103) and over 4years (male: 9.8×103, female: 7.8×103) exceeded 104 of maximum permitted standards in US EPA. The hazard index of non-carcinogenic pollutants by nitrogen dioxide, toluene, m,p-xylene and o-xylene, both male and female in apartment constructed under 4 years and over 4 years was found less than the permitted standards of hazardous health effects in CTE. Significant cancer risks and non-cancer hazard quotients were predicted in under 4 years of building year.

한국어판 정신증상평가척도의 신뢰도와 타당도

정순민,김미경,이정빈,최진환,정봉주,변원탄 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.3

Objectives : Psychotic Symptom Rating Scale (PSYRATS) is an assessment tool to measure the seventy of different dimen-sions of auditory hallucinations and delusions. The reliability and validity of the Korean version of PSYRATS (K-PSYRATS)were examined in Korean patients with major psychosis. Methods : The inter-rater reliability of the K-PSYRATS was determined from the videotaped interviews of the five Schizoph-renic patients. To measure validity and internal consistency reliability, the 109 patients with auditory hallucinations or delusions were assessed using the K-PSYRATS, Positive and Negative Syndrome Scale (PANSS) and Clinical Global Impression-Se-verity (CGI-S) scale. Results : K-PSYRATS was found to have excellent inter-rater reliability (intra-class correlation coefficient of auditory haliu-cination=0.81, P<.001, intm-class correlation coefficient ofde1usion=0.97, P<.001) and internal consistency reliability (Cron-bach's a of auditory hallucination =0.77, Cronbach's α of delusion =0.76). Significant correlation was found between K-PSY-RATS and positive syndrome subscale of PANSS and CGI. Conclusion : K-PSYRATS is a useful assessment instrument for psychotic symptoms in Korea.

Reliability and validity of the short‐version instrument to measure health promotion for Korean cancer survivors

Jung‐won Lim 한국사회복지학회 2019 Asian Social Work and Policy Review Vol.13 No.1

Purpose: The current study tests the validity and reliability of the short version of the Health Promoting Lifestyle Profile II (HPLP‐II) when used to measure health promotion for Korean cancer survivors. Methods: The survey data were collected from 175 Korean cancer survivors who were diagnosed with breast or colorectal cancer in South Korea. The confirmatory factor analysis (CFA) and structural equation modeling were conducted to examine the construct and criterion validity of the Korean version of the HPLP‐II. Results: Findings demonstrated that excluding nutrition and stress management, four subscales showed good internal consistency. The three competing models of the HPLP‐II were tested to determine the factor structure of the HPLP‐II for Korean cancer survivors: (a) the original 6‐factor, (b) the modified 4‐factor, and (c) the modified 5‐factor. The five‐factor solution with 23 items was selected for the final model. The criterion‐related validity based on the relationships between health promotion and HRQOL was demonstrated. Discussion: This study makes an important contribution to understanding the health promotion measure used by Korean cancer survivors. Specifically, this study provides a rationale to investigate the validity of a measure before such measures are used in the different language and cultural groups.

Combining Timber Production and Wood Processing for Increasing Forestry Income: A Case Study of 6th Industrialization in Korean Forestry

Won, Hyun Kyu,Jeon, Hyon Sun,Han, Hee,Lee, Seung Jung,Jung, Byung Heon Institute of Forest Science 2017 Journal of Forest Science Vol.33 No.4

This study was aimed to analyze the increased forestry incomes by combining timber production and wood processing, which is one of 6th industrialization types in Korean forestry. The selected household has been engaged in forestry for two generations and they produce timber and associated wood products in their own facility. The wood products include dimension lumber, interior wood material, cutting board, and cube chips, the household also utilize logging and sawmill residues as well as seed and seedlings as by-products. Incomes and expenses that have been incurred on individual processes of the sequential timber production and wood processing were surveyed, and we analyzed the economic outcomes of entire business. The results of this study indicate that the gross income of the household is 122.3 million Korean won and the net income is 93.6 million Korean won. The net income of the household is approximately 2.8 times higher than the average net income of whole households in the forestry of Korea in 2016, which is approximately 4.3 times higher than that of households that have been particularly engaged in timber production over the country. We found that the 6th industrialization by combining the two sequential processes creates approximately 3.2 times as much added value compared to the case relying on timber production only.

Method for Protection of Single‑Line‑Ground Fault of Distribution System with DG Using Distance Relay and Directional Relay

Jung‑Hun Lee,Min‑Su Park,Hong‑Seon Ahn,Kyung‑Won Park,Jun‑Seok Oh,Seung‑Gyu Jeon,Dong‑Kyu Kim,Jae‑Eon Kim 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4

When large scales DG are connected to the distribution system of unidirectional power currents, bi-directional power currents are formed, making it impossible to use conventional overcurrent protection methods alone to detect and isolate fault sections for ground and short-circuit faults. To solve these problems, this study proposed the method of protection against single-line-ground fault of common neutral line multi-contact local power distribution system using distance relay and directional relay. The proposed protection method was applied to the common neutral multi-ground distribution system to validate the protection against single-line-ground fault through the PSCAD/EMTDC software package and efectively detect and isolate only the zone of single-line-ground fault without malfunctions.