사업장(事業場) 근로자(勤勞者)의 사상체질(四象體質)에 따른 생활습관(生活習慣), 자각증상(自覺症狀), 건강인식(健康認識)에 관(關)한 연구(硏究)

서명효,강홍구,장두섭,왕명자,차남현,김삼태,권소희,정해경,송용선,이기남,Seo Muoung-Hoy,Kang Hong-Goo,Jahng Doo-Sub,Wang Myoung-Ja,Cha Nam-Hyun,Kim Sam-Tae,Kwon So-Hee,Jung Hae-Kyoung,Song Yung-Sun,Lee Ki-Nam 대한예방한의학회 2003 대한예방한의학회지 Vol.7 No.2

The study was conducted to evaluate the difference of life style, subjective symptoms and health cognition depending on the Sasang Constitution in the industrial workers. The results were as follows ; Constitutional distribution among exposed group were Tae-eum In(38.4%), So-eum In(35.2%), and So-yang In(26.4%) and it was turned out that Tae-eum In took a higher portion of Sasang constitution than other constitutions in technician workers. 'Exercise' and 'Obesity' were found most in Tae-eum In, In So-eum In there were many 'Normal' weight and 'Having digestive disorders' were found most in So-eum In. There were no significant difference in the health cognition among the constitutions. The closer to 'normal' weight, the higher prevalence in 'having' concern about health condition and the more 'normal' condition in sleeping, the higher prevalence of 'having' self-confident in present health.

오존공정을 이용한 염색폐수의 처리특성에 관한 연구

강용태,원태준,한상윤,고영발,박경덕 東亞大學校 建設技術硏究所 2008 硏究論文集 Vol.32 No.1

The wastewater from textile industry typically containing high alkalify, salts, organic matter, and high color. Textile wastewater is usually treated by anaerobic-aerobic activated-sludge process. The activated-sludge process is effective the reduction of organic matter, but generally does not remove color. Ozone process is one of the most effective process in removal of color for the textile wastewater. Ozone has a strong oxidized dissolution of organism, deceleration, deodorization, fumigation, etc., regarding to water. This study focused on the color removal of textile wastewater. In this study, textile wastewater was treated strongly with ozone at 650mg/hr and the flow rate through ozone contact tank was adjusted to 5L/min. In an application Ozone treatment, Color was generally decreased with time, however, COD removal effect was not that good. In this study, the removal efficiencies of CODcr and Color were 23.5%, 80.4% respectively.

JIT에서 준비작업(set up)시간의 단축방법

강경식,김태호,나승훈 명지대학교 공학기술연구소 1993 공학기술연구소 논문집 Vol.8 No.-

This study presents the application of a method in just In Time by the singleminute exchange of die(SMED) system and real example. JIT calls for small lots and frequent production runs. So, the setup time are more required in normal operating environment. Set up reduction is a key aspect of Just In Time since it supports reductions in manufacturing lead times and inventories. The SMED system in a technique used to reduce machine set up time. The SMED system is to increase the productivity of machines by reducing their idle time and to reduce machine set up time.

양이온교환수지에 대한 Co(Ⅱ), Ni(Ⅱ), Cr(Ⅲ) 및 Fe(Ⅲ) 이온의 흡착 특성 : 원자로 일차 냉각재 계통내 탈염공정에의 적용 Application to the Demineralizing Process in a Primary Coolant System of PWR

강소영,이병태,이종운,문승현,김경웅 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.1

가압경수로 일차냉각수내 탈염공정의 효과적 운용을 위하여 Amberlite IRN-77 양이온 교환수지의 특성 및 Co(II), Ni(II), Cr(III), Fe(III) 이온의 흡착거동을 연구하였다. 용존 금속이온 농도가 약 200 mgL^-1 인 용액 100 mL에 대하여 이온교환수지 투입량은 약 0.6g이 가장 적절하였으며, 이온교환 반응 속도 측정 결과 대부분의 흡착은 반응 1 시간 이내에 신속히 발생하였다. 수지에서의 양이온 교환은 Langmuir 흡착등온선을 잘 따르는 것으로 나타났으나, Fe(III)의 경우, 다른 금속과는 달리 쉽게 평형에 이르지 못하였으며 이는 공기와 오래 접촉한 결과 철산화물 또는 수산화물을 형성하며 용액 중으로부터 침전되기 때문인 것으로 관찰되었다. 전자가가 동일한 Co(II)와 Ni(II)가 동시에 포함된 모의 조제용액에 대하여 흡착실험을 한 결과, 각 이온은 거의 동일한 흡착 거동을 보였다. 그러나 전자가가 큰 Cr(III)이 첨가된 경우, 이들은 기존에 수지에 흡착되어 있던 전자가가 낮은 금속들을 탈착시키고 대신 흡착하는 경향을 보였다. 따라서 이온교환수지를 이용한 효과적인 탈염 공정을 위해서는 용존 금속 상호간의 경쟁적 흡착관계의 규명이 필요한 것으로 여겨진다. Characteristics of Amberlite IRN-77, a cation exchange resin, and the mechanisms of its adsorption equilibria with Co(II), Ni(II), Cr(III) and Fe(III) and Fe(III) ions were investigated for the application of the demineralizing process in the primary coolant system of a pressurized water reactor (PWR). The optimum dosage of the resin for removal of the dissolved metal ions at 200 mgL^-1 was 0.6 g for 100 mL solution. Most of each metal ion was absorbed onto the resin in an hour from the start of the reaction. Each metal adsorption onto the resin could be well represented by Langmuir isotherms. However, in the case of Fe(III) adsorption, continuous formation of Fe-oxide or -hydroxide and its subsequent precipitation inhibited the completion of the equilibrium between the metal and the adsorbent. Cobalt(II) and Ni(II), which have an equivalent electrovalence, were adsorbed to the resin with a similar adsorption amount when they coexisted in the solution. However, Cr(III) added to the solution competitively replaced Co(II) and Ni(II) which were already adsorbed onto the resin, resulting in desorption of these metals into the solution. The result was likely due to a higher adsorption affinity of Cr(III) than Co(II) and Ni(II). This implies that the interactively competitive adsorption of multi-cations onto the resin should be fully considered for an efficient operation of the demineralizing ion exchange process in the primary coolant system.

교정치료와 관련된 치조골 높이 변화에 대한 연구

강경화,이흥수,태기출,김상철 원광대학교 생체재료·매식연구소 1997 원광생체재료·매식 Vol.6 No.2

근관 전색재의 방사선 불투과성에 관한 비교연구

김태민,김서경,황인남,황윤찬,강병철,윤숙자,이재서,오원만 대한치과보존학회 2009 Restorative Dentistry & Endodontics Vol.34 No.1

This study was performed to assess the radiopacity of a variety of root canal sealers according to the Specification concerning root canal sealers. Ten materials including Tubli-Seal™, Kerr Pulp Canal Sealer™, AH 26^(R), AH plus^(R), AH plus jet™, Ad seal™, Sealapex™, NOGENOU™, ZOB seal™, Epiphany™, and dentin were evaluated in this study. In the first part. densitometric reading of an each step of aluminum step wedge on occlusal film was performed at different voltage and exposure time. In the second part, ten specimens were radiographed simultaneously with an aluminum step wedges on the occlusal films under decided condition. The mean radiographic density values of the materials were transformed into radiopacity expressed equivalent thickness of aluminum (mm Al). The following results were obtained 1 Among the various conditions, the appropriate voltage and exposure time that meet the requirement density was 60 kVp at 0.2 s 2 All of the materials had greater radiopacity than 3 mm Al requirement of ANSI/ADA specification No. 57 (2000) and ISO No. 6876 (2001) standards. 3 The radiopacity of materials increased as thickness of materials increased. 4 The mm Al value of each specimen at 1mm in thickness has a significant difference in the statistics. It suggests that root canal sealers have a sufficient radiopacity that meet the requirement. 다양한 근관전색제는 방사선 사진상 주위 해부학적 구조와 구별될 만한 방사선 불투과성을 나타내야 한다 따라서 이런 물질들이 근관에 충전될 때의 방사선 불투과성 정도를 평가해야 할 필요성이 대두되고 있다. 본 실험에서는 다양한 근관전색제들의 방사선 불투과성을 평가하고자, 방사선 노출조건에 따른 aluminium step wedge에 대한 광학 밀도를 알아보고, 그 중 적절한 노출조건을 선택하여 수종의 근관 전색재의 방사선 불투과성 정도를 알루미늄 두께로 환산하여 비교해 보고자 한다. 방사선 불투과성의 기준을 위해 11개의 step으로 구성된 aluminum step wedge을 사용하여, 60kVP, 70kVp관전압 상태에서 각각 0.2, 0.3, 0.4초 그리고 0.2, 0.3, 0.33초의 꼭 노출시간으로 교합필름상에서 방사선 촬영후 적절한 노출 조건을 구하였다. 직경 5mm 각각의 두께 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mm인 10종 (Tubli-Seal™, Kerr pulp Canal Sealer™, AH26^(R), AHplus^(R), AH plus jet starter kit™, Ad seal™, Sealapex™, Nogenol root canal sealer™, ZOB seal™, Epiphany™)의 근관전색재 시편을 각 재료와 두께당 10개씩 제작한 후, 동일한 두께의 상아질 시편, aluminum step wedge와 함께 정해진 노출시간에 따라 방사선 촬영을 하였다. 모든 필름은 자동현상기로 현상하였다. 시편의 방사선 흑화도를 densitometer로 5회 반복 측정 후, 평균값을 구하여 알루미눔 두께로 환산하였다.얻어진 정보를 분석하여 다음의 결과를 얻었다. 1 관전압 60 kVp에서 노출시간 0.2, 0.3, 0.4초, 70 kVp에서 0.2, 0.3, 0.33초로 변화를 주어 방사선 촬영을 하였을 때 흑화도가 ISO No. 6876 규격에 가장 적합한 것은 60 kVP, 0.2초 일 경우였다. 2 측정된 근관 전색제의 방사선 불투과성은 2.29 mm Al (N0GEN0L)로부터 13.69 mm Al (AH Plus jet)까지 다양하게 나타났으나, 모두 ANSI/ADA specification (2000) 또는 ISO No. 6876 (2001) 규격이 제시한 최소한 3mm Al 이상의 방사선 불투과성을 지녀야 한다는 기준에 적합하였다. 3 재료의 두께가 증가할수록 방사선 불투과성은 증가하지만, 정비례하지는 않았다. 4 각 실험재료의 1 mm 두께의 시편에 대한 mm Al값들은 통계적으로 유의한 차이가 있었다. 이상의 결과는 본 실험에 사용된 수종의 근관 전색재는 모든 규격에 적합한 방사선 불투과성을 가지고 있음을 시사한다.

만성정신질환자의 직업재활 사례

황태연,한은선,이영문,강순정,정경선 용인정신의학연구소 1995 용인정신의학보 Vol.2 No.1

장치 및 미디어 관리를 통한 네트워크 기방 백업 및 복구

복경수,강태호,윤종현,유재수 충북대학교 컴퓨터정보통신 연구소 2005 컴퓨터정보통신연구 Vol.13 No.1

저장 매체의 대용량화가 가속화되면서 대용량의 데이터를 효과적으로 백업하기 위한 요구가 증가되고 있다. 본 논문에서는 네트워크 장치 및 미디어 관리를 통해 네트워크 기반 백업 및 복구를 지원하는 백업 소프트웨어를 설계하고 구현한다. 제안하는 백업 소프트웨어는 디스크 기반 백업을 지원하기 위해 NDMP 프로토콜을 확장한다. 제안하는 백업 소프트웨어는 전체 또는 부분 백업, 수동 또는 자동백업 기능을 제공한다. 또한, 사용자에 의해 요청되는 부가적인 작업을 처리하기 위해 pre/post 스크립트 기능을 제공한다. 제안하는 백업 소프트웨어는 백업 장치 및 미디어를 효과적으로 관리하고 이를 풀(pool)이라는 논리적인 단위로 관리하는 장치 및 미디어 관리 기능을 제공한다. As the size of storage media is growing, the efficient backup for the huge capacity data are required. In this paper, we design and implement the backup software that supports network based backup and restore with management of network devices and media. The proposed backup software extends NDMP protocol for the disk to disk backup. In addition, the proposed backup software has various features such as partial or full backup, immediate or automatic backup, and so on. It supports pre/post script to process additional actions for users. It also provides devices and medium management features that efficiently manages a large number of backup devices and media, and groups devices and media management functions that are managed by logical units called pools.

개선된 사람 혈장중 세파클러 농도 정량법을 이용한 세파클러 캡슐의 생체이용률 측정

김태완,송옥경,한선영,Cao, Qing-Ri,박미진,강성화,신관석,Cui, Jing-Hao,이범진 한국약제학회 2005 Journal of Pharmaceutical Investigation Vol.35 No.2

After establishing improved HPLC analytical method ofcefaclor in human plasma samples, a bioavailability study of cefaclor capsules was conducted according to the guidelines of Korea Food and Drug Administration (KFDA). The standard calibration curve using an HPLC with UV detector was constructed in a range of 0.0324--16 μg/m1. The 6% perchloric acid instead of 6% trichloroacetic acid was used to precipitate plasma protein. The HPLC chromatograms were precisely and accurately resolved when spiked with human plasma spiked with cefaclor and cephalexin (internal standard). Twenty healthy male Korean volunteers received two commercial cefaclor capsules, Neocef ' capsule (Jinyang Pharm. Co., Ltd) or Ceclor" capsule {Lilly Korea. Co., Ltd.) at the 250 mg cefaclor in a 2 x 2 crossover study. There was a one-week washout period between the doses. Plasma concentrations of cefaclor were monitored for 8 hours after oral drug administration. AUC, the area under the plasma concentration-time curve from time zero to 8 hr (13 points), was calculated by the linear trapezoidal rule method. C,,,a" (maximum plasma drug concentration) and Tmax (time to reach Cma,) were compiled from the plasma concentration-time data. Analysis of variance was carried out using logarithmically transformed AUC, and Cmax. No significant sequence effect was found for all of the bioavailability parameters indicating that the cross-over design was properly performed. The 90% confidence intervals of the AUC, ratio and the Cmax ratio for Neocer/Ceclor" were 0.9049 S S < 1.0304 and 0.9776 5 S 1.226, respectively. These values were within the acceptable bioequivalence intervals of 0.80-1.25. Thus, our study demonstrated the bioequivalence of Neocef"/Ceclor" with respect to the extent of absorption.

Apolipoprotein E 다형성에 따른 사업장 근로자의 혈중 지질농도, 영양소 섭취 및 건강관련 생활습관

박유경,조상운,강지연,백윤미,성숙희,최태인 대한지역사회영양학회 2008 대한지역사회영양학회지 Vol.13 No.5

The purpose of this study was to investigate the association among nutrient intakes and health-related lifestyles with cardiovascular disease risk assessed by blood lipid profile according to Apolipoprotein E genotypes. Middle-aged industrial male workers who had completed their annual medical examination were recruited and data of 675 subjects who finished the nutrient survey were used in the analysis. Anthropometric parameters, dietary assessment (FFQ), health-related lifestyles and blood profiles were used for statistical analyses. Apo E genotype groups were classified into the following three genotypes: Apo E2 group (including E2/E2, E2/E3, E2/E4), Apo E3 group (including E3/E3), Apo E4 group (including E3/E4, E4/E4). The frequency of Apo E2, E3, and E4 allele were 13.3%, 75.0% and 11.7% respectively. There were no significant differences in the anthropometric parameters depending on different Apo E genotypes. Also, no significant differences in the nutrient intakes were found according to the genotype groups. The nutrient intakes of all subjects were similar to or higher than the level of KDRIs (Dietary Reference Intakes For Koreans) except for intakes of calcium (67.44% of KDRIs), vitamin A (73.83% of KDRIs) and vitamin B2 (78.02% of KDRIs). Also, there were no significant differences of health-related lifestyles according to Apo E genotype groups. As for the lipid profiles, Apo E4 group had significantly higher total and LDL-cholesterol concentrations than the Apo E2 group (p < 0.05). We confirmed that plasma total and LDL-cholesterol concentrations were greatly influenced by Apo E genotypes. However, nutrient intakes and health-related lifestyles were not associated with Apo E genotypes.