XH₂PO₄(X = K, Rb)결정의 고온 현상

박종호,백남권 진주교육대학교 초등교육연구소 2005 科學敎育硏究 Vol.28 No.-

In order to decide the Ⅱ→Ⅰ transition of XH₂PO₄ whether due to the structural phase transition or due to thermal decomposition, we investigated the high-temperature anomaly of XH₂PO₄ (X=K, Rb) by means of x-ray diffraction, differential scanning calorimetric, thermogravimetric. From the TG, the loss in weight starts from T_(p)=196℃ and levels off 310℃ and corresponds to 13.24% of the initial KDP weight. This corresponds very closely to the removal of one molecule of water from KDP leaving a residue of KPO₃. Also, the loss in weight starts from T_(p)=96℃ and levels off 320℃ and corresponds to 9.87 % of the initial RDP weight. This corresponds very closely to the removal of one molecule of water from RDP leaving a residue of RbPO₃. From the x-ray, we believe that the XH₂PO₄ with monoclinic symmetry does not exist, and hence, the transition at T_(p) is not a structural phase transition where XH₂PO₄ transforms from tetragonal to monoclinic symmetry. These facts support that the Ⅱ→Ⅰ transition are related to the structural phase transition but related to the thermal decomposition (Condensation and polymerization of PO₄ group). Therefore, This extraction supports that around T_(p) thermal condensation commences on the surface, such as the following chemical reaction : 4XH₂PO₄ →2XH₂PO₄·X₂H₂P₂O_(7) + H₂O

土壓과 輪壓에 따른 淺層地中理設管의 變形量 分析

박종엽,상현규,류권일,김팔규 충남대학교 산업기술연구소 2002 산업기술연구논문집 Vol.17 No.1

In this paper, indoor soil tank is used to measure the deformation of flexible pipe in the soil mass on the theory of Bossinesq's stress and Marston's Ditch Conduit case. Besides, field compaction test is perfomed for compaction effect of the real construction field. In compression test of the pipe in the soil mass, the flexible pipe has 3.5% of the allowed defomation, and 220kg of the allowed compression load. With theories and soil tank test in this study, the allowed deformation ratio of the flexible pipe is determined to be safe at the depth over 40cm. Consequently, it is considered that the quality of the pipe should be maintained, and the development of the high quality pipe is needed for the safe and economical construction. Especially in compaction, inappropriate compaction could be dangerous.

대학복싱선수의 심리적 경쟁상태불안(Competitive State Anxiety)에 관한 연구

김현권,유종만 한국학교체육학회 2001 한국학교 체육학회지 Vol.11 No.2

본 연구는 복싱선수의 시합 전 제기되는 경쟁불안(competition anxiety)에 대한 연구에 그 목적을 두고 있다. 특히 경쟁불안이 높은 종목은 단체종목보다 개인종목으로서, 복싱종목은 타종목보다 이의 연구에 가장 타당하리라 사료된다. 복싱선수들의 심리적 불안정도를 분석하기 위해 생리적 측정방법인 Heart Rate, SCAT, IRT를 측정도구로 사용해 28명의 복싱선수들을 대상으로 안정시와 경기전 SCAT, IRT 그리고 Heart Rate를 측정하여 분석한 결과 본 연구자는 다음과 같은 결론을 얻었다. 1. 복싱선수들의 경기진 SCAT에 의한 불안정도는 높지도 낮지도 않은 중간정도였다. 2. 복싱선수들의 IRT에 의한 불안정도는 안정시와 경기전 IRT의 차가 심하지 않아 역시 인지적 불안정도도 낮지 않은 것으로 나타난다. 3. 복싱선수들의 심박수에 의한 심리적 불안정도는 안정시와 경기전 그 차가 심해 높게 나타났다. 4. 복싱선수들의 불안항목간 상관정도는 SCAT와 심박수간 매우 높은 상관을 보였으며 기타 항목간에는 상관이 낮았다. 이러한 결과를 종합하여 보면 선수들의 정확한 불안정도를 측정하기 위해서는 많은 측정항목과 과학적 기자재가 필요하며 선수 개인의 특성을 고려한 종단적 연구가 필요하다고 사료된다. The purpose of this study was to investigate the psycholo8ical competition anxiety tendency on Boxers(28) who were participated in the College Amateur Sexing Toumement. This test used SCAT(Sports Competition Anxiety Test) scores, IRT(Impatience Reaction Ti-me), and HR(Heart Rate) before the game as psychological tendency by using IRT and Heart Checker (108 system). IRT was measured 3 times after presented 5 seconds as basic intervals. The results were as follows: 1) Competition Anxiety levels of Boxers using SCAT scores showed middle level in comparison with Martens' Standard Index. 2) The differences of IRT between rest and before game showed nonsignificant, then, cognitive competition anxiety level on Boxers was little changes according to situations. 3) Tle differences of HR between rest and before game showed signfificant at P < .001, then, psychological competition anxiety level on Boxer was very high before game. 4) There is nonsignificant correlation between SCAT and IRT, and HR before game as competition anxiety levels.

한국형 출혈열 환자에서 분리한 한타 바이러스의 핵산 분석

조종태,윤성철,안규리,한진석,김성권,이정상 단국대학교 1998 論文集 Vol.33 No.-

Hemorrhagic fever with renal syndrome(HFRS)is an infectious disease showing diverse clinical manifestations according to different serotypes of hantavirus. On the assumption that the antigenicity, nucleotide and amino acid sequence diversity of hantaviruses, as well as immune response diversity of individual KHF patients may be present, this study was performed to analyse the genetic diversity of hantaviruses isolated from patients with KHF. In the 13 samples hantaviral RNAs were extracted, cDNAs of partial M segment were amplified by RT-PCR using genus-reactive primer, amplified cNNAs were analyzed by direct sequencing method, and then the nucleotide and deduced amino acid sequences were compared with previously known sequences of four serotypes of hantavirus isolated from rodent hosts and each other by the computer assistance. The results were as follows. The nucleotide and amino acid sequences of 11 samples among the 13 human isolates showed 90.3∼95.5%, 86.7∼97.9% the other 1 samples 82.7%, 71.9% homology respectively to those of Hantaan virus 76-118 strain, and another 1 sample showed 83.7%, 75.3% homology respectively to those of Seoul virus B1 strain isolated from rodent host. The nucleotide and amino acid sequences of 7 among 12 Hantaan samples showed differences within 5%, 10% respectively each other and high genetic similarities, but those of the oehr 5 among 12 Hantaan samples showed low genetic similarities each other. In conclusion, hantaviruese isolated from KHF patients showed genetic diversity compared with previously known hantaviruses isolated from rodent hosts.

Microsporum gypseum 감염 1례

김성권,시차자,김의종,석종성 대한임상병리사협회 1993 대한임상병리사회지 Vol.25 No.1

도덕 교육의 방법론 : 가치명료화 도덕교육의 이론과 수업적용 The Theory of Value Clarifying Moral Education & Its Classroom Application

정보주,권종규 晋州敎育大學校 初等敎育硏究所 1993 初等敎育硏究 Vol.3 No.-

안정적 전력공급을 위한 154kV 변전소 배전선로간 연계운영에 관한 연구

김광호,손명권,정종찬 江原大學校 産業技術硏究所 2009 産業技術硏究 Vol.29 No.B

For a stable supply of electric power, periodical inspection of the electric facilities and repair of the distribution lines are required. In case of any unexpected accidents, looped operation among distribution lines may be necessary in order to supply electricity through the sound lines, separating the faulted lines. As a result of this study, it was found that normal looped operation became impossible when phase difference of the looped distribution lines is more than 3 degrees compared with the voltage supply of the distribution lines. Therefore, for a stable supply of electric power to Chuncheon, it is judged to be desirable that looped operation of the distribution lines coming from the same substation M. Tr Bank shall be performed in principle and in case of looped operation with the substation of different system, looped operation among the lines shall be performed after voltage regulation of the substation M. Tr Bank, maintaining similar voltages and load supply volume in order to avoid phase difference through checking the operation conditions of each substation M. Tr Banks. And when looped operation among the distribution lines is scheduled, voltage regulation schedule has been established so far by calculating maximum supply volume through the transformer of the substation and the maximum load volume through the distribution lines but in the future, looped operation of the distribution lines shall be carried out by removing voltage difference with regulating tap or load of the surrounding transformers, with giving prior notice to the substation operators.

메틸렌 클로라이드에 의한 폐장염

장규진,박종태,,김은경,김병권,김해준 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Objectives: The authors report a case of pneumonitis caused by methylene chloride (MC). Methods: The patient was examined and diagnosed by clinical, radiologic, laboratorial and medical evaluation. The concentration of MC in the factory was measured to determine the exposure level. Results: The patient had an infiltration in chest X-ray, which underwent rapid relief of radiological finding, respiratory acidosis and hypoxemia in arterial blood gas analysis, and a ground-glass opacity in high resolution computerized tomography. MC was the only exposed chemical compound in this case. The concentration of MC was 39.9 ppm in the factory. Conclusions: We diagnosed this to be a case of pneumonitis by MC based on clinical laboratory findings, exposure history to MC and MC concentration in the factory.

Angiotensin Concerting Enzyme 유전자의 유전적 다형성(Genetic Polymorphism)이 관상동맥 질환 위험인자에 따른 혈중 Plasminogen Activator Inhibitor-1의 농도에 미치는 영향

김덕경,김종원,권현절,류재춘,박승우,김준수,이상훈,홍경표,박정의,이원로 대한고혈압학회 1996 대한고혈압학회지 Vol.2 No.2

근로자 건강증진 실천에 영향을 미치는 요인

김은경,김병권,박종태,김형렬,구정완 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.1

목적: 본 연구에서는 사업장 근로자들의 건강증진 실천 현황을 알아보고, 실천에 있어서 장애요인이 되는 것이 무엇인지 파악하여 효율성과 실효성이 있는 사업장 건강 증진 사업의 발전방향을 모색하는데 그 목적을 두었다. 방법: 경기도 K대학병원, 서울시의 C대학병원에서 보건관리대행사업 또는 국고지원사업을 받고 있는 사업장 중 서울경기지역의 사업장 규모별 비율을 고려하여 사업장 규모별로 사업장 근로자수의 20%를 대상으로 사업장 건강증진사업 현황에 대한 설문조사를 시행하였다. 결과: 대상자 중 건강증진 활동을 하고 있는 비율은 51.3%로 나타났으며 건강증진을 실천하고 있는 경우, 금연을 하고 있다는 응답이 가장 많았고 실천의 계기로는 TV 또는 언론매체의 자극에 의한 경우가 33.4%, 건강진단에서 이상 소견 및 건강이상을 느껴서 시작한 경우가 22.1%였다. 근로자들이 가장 필요로 하는 사업장내 건강증진프로그램은 운동이 41.9%로 가장 높았고, 스트레스 관리가 그 뒤를 이었다. 건강증진사업에 대한 기대 정도는 상당히 효과가 있다고 응답하거나 어느 정도 효과가 있을 것이라고 응답한 경우가 84.8%로 건강증진사업에 대하여 근로자들이 긍정적으로 평가하고 있으며 기대도가 높은 것을 확인할 수 있었다. 건강증진 실천 여부에 영향을 주는 요인은 근로자의 건강상태, 직무자율성 등으로 나타났다. 결과: 개인의 의지 부족이나 시간, 비용 등이 건강증진 활동의 장애요인으로 작용하고, 근로자의 건강상태나 직무자율성 등이 건강증진 실천에 영향을 주고 있는 것으로 나타났다. 장애요인은 개인의 건강증진 실천 의지를 북돋아 주기 위한 사업장 단위의 근로자의 건강증진 활동의 유지 및 지지를 위한 프로그램 강화를 통해 극복할 수 있다. 또한 사업주의 시간적 배려, 사업주와 국가의 경제적 지원책, 지역사회 공공 체육시설 이용 개방 등을 고려할 필요가 있다. 건강증진 활동 실천집단과 비실천집단에 연령, 학력, 결혼여부, 연봉, 근무 일정 등의 차이가 있었는데 이를 통해 건강관리에 있어 시간, 경제, 개인의 생활환경이나 지식수준이 관여한다고 볼 수 있다. 결론: 이상의 결과를 통해 볼 때 건강증진 활동의 효과에 대해서 84.8%가 긍정적으로 평가하고 있다는 것을 알 수 있다. 현재 사업장 건강증진 활동은 금연이나 운동을 중심으로 이루어지고 있으나 본 연구 결과 운동이나 스트레스 관리에 대한 요구도가 높은 것을 확인할 수 있었다. 이에 따라 근로자들의 운동을 위해 사용이 용이한 운동 시설을 마련해야 하며 본 연구에서 긍정적으로 평가 되었던 바와 같이 사업장 밖에 공공 건강증진시설의 확대 방안을 강구하고, 스트레스 관리를 위한 구체적인 방안을 마련해야 할 것이다. Objective: The aim of this paper was to develop efficient and practical health promotion strategies in the workplace by investigating both the present status of health promotion and the barriers to its practice. Methods: A questionnaire was administered to 20% of industrial workers in the workplaces which receives the health care agency enterprise or are supported by a grant from the national treasury, K University Hospital in Gyeong-Gi province, and C University Hospital in Seoul. Results: According to the questionnaire survey, 51.3% workers were practicing health promotion activities and smoking cessation was the most common method among them. Regarding the factors that prompt workers to commence health promotion activities, TV or the mass media had a 33.4% effect, followed by a 22.1% effect for an abnormal finding at regular health screening. The most necessary health promotion activity in the workplace was exercise (41.9%), followed by stress management. When asked about their expectations of the health promotion program, 84.8% of the respondents answered that they expected it to be significantly or somewhat effective. Factors affecting the health promotion activities of workers were worker' s health status and job control. Conclusions: This study demonstrated that workers evaluate health promotion activities positively and that some workers are unable to participate in these activities despite their willingness to do so due to the barrier of circumstances. To encourage worker' s participation, the government and employers should remove barriers.