On the regularity of weak solutions of partial differential equations

김정수 釜山大學校 1964 論文集 Vol.5 No.1

10대 카누 선수의 철분영양상태 조사

김정수,김선효,권용헌 한국운동과학회 2002 운동과학 Vol.11 No.2

김정수, 김선효, 권용헌. 10대 카누선수의 철분영양상태 조사. 운동과학 제11권 제2호, 535-550, 2002. 이 연구는 남녀 중·고등학교 카누선수를 preseason 중에 18명, season 중에 12명을 대상으로 식이 조사와 혈액검사를 통해 카누 선수의 스포츠 빈혈 요인을 분석하였다. Preseason과 season 중 남녀 카누 선수의 평균 연령은 15.3세, 평균신장은 173.3㎝, 평균체중은 64.9㎏이었으며, 평균체질량 지수(BMI)는 21.7로 표준 체중에 속하였다. 식이 조사는 24시간 기억법(24-hour recall method)과 CAN프로그램(computer aided nutritional analysis program; 한국영양학회개발)을 이용하여 조사된 내용을 한국인 영양 권장량(Korean RDA)과 비교하였다. 혈청 철, 혈철 페리틴, TIBC, TS, 헤마토크리트 그리고 헤모글로빈 등 철 영양상태에 대해 분석하였다. 연구결과 식이를 통한 하루 영양소 섭취량은 preseason보다 season동안에 남녀 선수 모두 높았으며, 남자선수에 비해 여자선수의 철 섭취량이 양호하였다(p<0.05). Preseason 중에 철 섭취량은 권장량의 63.7%로 낮았으며, season 중에는 권장량의 93.6%로 권장량고 거의 유사하였다(p<0.01). 끼니별 영양소 섭취 비율에서 preseason과 season 동안 아침, 점심, 저녁식사와 간식을 통한 영양소 섭취 비율은 남자선수의 경우는 양호하였으나, 여자선수의 경우 아침식사를 통한 영양소 섭취비율이 낮고 간식을 통한 영양소 섭취비율이 높아 바람직하지 못하였다. Preseason과 season 동안 동물성 식품과 식물성 식품을 통한 철의 섭취 비율은 남녀 모두 식물성 식품에서 2/3정도 섭취하고 있어, 연구대상자의 철의 주요 급원은 식물성 식품으로 나타났다. 전체 대상자의 heme 철과 nonheme 철 섭취량은 preseason 보다 season 동안이 2배정도 높았으나(p<0.05), 가상적인 철 흡수율은 season에서 낮았다. 이는 preseason에 비해 season에서 철 유용도가 낮은 식사를 하는 비율이 높았기 때문으로 생각된다. 혈청 철 농도와 transferrin 포화도는 preseason 보다 season에서 높았으나(p<0.05), ferritin을 제외한 혈청 철 영양 상태 분석 지표는 두 기간간에 차이가 없고 대부분이 정상범위에 속해 있었다. Preseason과 season에서 전체 대상자의 혈청 ferritin 농도와 혈청 중의 다른 철 영양 상태를 나타내 주는 지표들간의 상관관계는 혈청 ferritin 농도와 혈청 TS간에는 유의적인 양의 상관관계가 있었으나(p<0.05), 다른 지표간에는 유의성이 나타나지 않았다. 빈혈 발생 요인은 preseason에서 혈청 ferritin 44.4%, 철 농도 50%, TS 44.4% 그리고 Hb 13.3%, Hct 6.7%로 나타났으며, season에서는 33.3%, 25.0%, 25.0% 그리고 8.3%, 8.3%로 각각 나타났다. 연구 대상자의 식이를 통한 철 섭취량은 preseason에서는 불량하고 season에는 양호하여, 두 기간간에 차이가 있어 철 영양섭취가 평소에 고르게 이루어지지 않고 있음을 보여주었다. 그러나 season의 경우에도 철 유용도를 높일 수 있는 MPF나 비타민 C의 섭취가 적절히 이루어지지 못해, 철 흡수율을 떨어뜨릴 수 있는 등 철 섭취의 질적인 문제도 인식할 수 있었다. 따라서 preseason과 season의 구분 없이 철의 양적, 질적인 섭취를 고려한 균형 잡힌 식사와 함께, 개개인의 체력에 맞는 적절한 운동량 조절이 이루어져야 할 것이다. 또한 남녀 대상자 모두 흡수율이 낮은 nonheme 철을 주로 섭취하고 있으므로 육류의 붉은 살코기, 가금류 및 생선류 등을 주로 섭취하고 철의 흡수율을 높이는 데에 기여하는 비타민 C의 섭취도 충분히 해야할 것이다. 아울러 운동선수의 합리적인 영양관리를 위한 영양교육과 체력에 맞는 운동조절이 함께 이루어져야 카누선수들의 빈혈 발생률을 줄일 수 있을 것이다. Kim, J. S., Kim, S. H. and Kwon, Y. H. A Study on the Nutrition Status of Iron among Teenage Canoe Players in Korea Exercise Science, 11(2): 535-550, 2002. This study was carried out to compare the nutrition status of iron(Fe) among teenage canoe players in Korea between the periods of preseason and season, based upon dietary nutrient intakes and serum indices of Fe nutrition status. Subjects were composed of 18 and 12 students including male and females, in preseason and season, respectively. Blood was collected for all subjects after 15 hour fasting in preseason and in season, respectively. Serum Fe concentration, ferritin concentration, total Fe binding capacity(TIBC), transferrin saturation(TS), hematocrit(Hct) and hemoglobin(Hb) values were determined. As a result, dietary nutrient intakes were lower in preseason than in season. Daily dietary Fe intake of subjects was 63.7% during preseason, and that was 93.6% of the Korean PDA during season; thus Fe intake was significantly lower in preseason than in season (p<0.01). However, apparently absorption ratio of Fe was higher in preseason than in season as food source of iron tended to be better in preseason than did in season. Serum Fe concentration and TS were significantly lower in preseason than in season (p<0.05), other indices of serum Fe nutrition status were not different between in two periods except serum ferritin. Serum ferritin and TS had significantly positive correlation in two period (p<0.05),respectively. For the prevalence of anemia in preseason, 44.4%, 50.0%, 44.4%, 13.3% and 6.7% by determining serum ferritin concentration, Fe concentration, transferrin saturation, Hb and Hot, respectively. In case of season, the prevalence of anemia evaluated by serum ferritin, Fe concentration, transferrin saturation, Hb and Hct was 33.3%, 25.0%, 25%, 8.3% and 8.3%, respectively. As a consequence, canoe players should increase the intakes of foods containing heme-Fe such as red lean meat and also increase intake of vitamin C as an increasing factor of bioavailability of vitamin C in order to prevent the sport anemia by enhancing the nutrition status of Fe, and they should manage their meals evenly through preseason and season.

[가상인터뷰 : 박두진을 만나다] 어떻게 당신은 이길 수가 있었는가?

김정수,김정수 새가정사 2016 새가정 Vol.685 No.-

우리시대 사진의 상황 : 무제 8 ( 김정수 )

김정수 현대사진영상학회 1998 우리시대 사진의 상황 Vol.- No.-

무선전력 전송효율 음영영역 제거와 최대효율 전송을 위한 3D 스캐닝 MR-WPT 시스템

김정수,이규식,김남윤,김창우 한국전자파학회 2020 한국전자파학회논문지 Vol.31 No.1

본 논문에서는 송신부 코일을 Pan-Tilt 모터를 사용한 3D 스캐닝을 통하여 전송효율 음영영역(dead-zone)이 제거된 최대수신 전압을 갖는 영역(zone)을 짧은 시간 내에 정확하게 찾는 3D 스캐닝 MR-WPT(magnetic resonance wireless power transfer) 시스템을 제안한다. 이 시스템은 발진기, 전력 증폭기, MCU, PC, Pan-Tilt 모터, 송수신 코일, 정류기 그리고 송수신통신부 회로로 구성된다. 이 시스템은 존기반 최대전송효율 탐색(zone-based maximal transmission efficiency searching process) 알고리즘을 적용하여 최대전송효율을 찾으며, 이때 찾은 전송효율 최대점은 Pan, Tilt 각도를 5°씩 나눠서 스캔하여 찾는전체스캔(full scan)의 전송효율 최대점과 비교하여 측정시간은 11배 빠르고, 오차 또한 작은 것을 측정을 통해 확인되었다.

조직내 갈등 원천과 관리적 접근에 관한 연구

김정수 慶南專門大學 1996 論文集 Vol.24 No.1

都市河川 生態復元 을 위한 河川邊 植生의 기초적 연구

김정수,김진선 淸州大學校 都市·地域開發硏究所 1998 都市·地域開發硏究 Vol.6 No.-

The urban environment has been changed artificially by urban developing. Especially, urban stream is very important resource for urban circulatory system. However, urban stream has been changed such as channelization of stream, streamed road, or streamed parking area by artificial development. To solve these problems, the ecological restoration was suggested. The ecological restoration plan, that without consideration of established vegetable ecosystem, will cause to another problem. The urban stream has a typical ecosystem. For example, urban stream becomes a naturalized center for flourishing naturalized plants. Among those naturalized plants, unfavorable plants for people must be removed or inhibited for growing. Therefore, fundamental and systematical studies about established vegetation and naturalized plants are necessary for urban stream ecological restoration.

신갈천의 조류분포

김정수,구태회 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

This is a report on the birds recorded from May 1995 to April 1996 in Shingal stream and reservoir. During the investigation period was observed a total 41 species and 7,932 individuals. The most dominant species was Anas poecilorhyncha 59.20%(4,696 individuals), followed by Passer montanus 14.12%(1,120 individuals), Anas platyrhynchos 5.50%(436 individuals) and Pica pica 5.02%(398 individuals). The index of species diversity and no. of equally common species were each 1.608, 4.991. Monthly of the most species and individuals were investigated at February that were 18 species and 2,475 individuals. The highest species diversity and no. of equally common species were 1.827, 6.215 respectively at June 1995. Seasonally the most species and individuals were watched in winter that were 28 species and 4,760 individuals. The highest species diversity and no. of equally common species were each 1.671, 5.322 at spring.

농구수행에 관련된 개인의 심리적 변인이 팀응집력에 미치는 영향

김정수,이용현 세명대학교 2000 世明論叢 Vol.8 No.-

The purpose of this study was to examine the effect on the team cohesion in psychological factors with basketball which required team cohesion. subject(N=226) were consist of middle and high school athletes(male) which were located in S and K area. The questionnaire designed for this study included: 1) competitive state anxiety-18items, 2) motivation climate-13items, 3) state self-confidence-13items, 4) team cohesion-22items. The statistical methodologies to analyze the data were descriptive statistics, one way ANOVA, correlation analysis and regression analysis. The result of this study by the process and the data mentioned above shows the followings: First, there are significant difference between exercise career and the team cohesion. Second, there are significant relationships between exercise career and the team cohesion. Third, there are effect on team cohesion and task cohesion with competitive state anxiety, cognitive state anxiety and somatic state anxiety. Fourth, there are effect on team cohesion with motivation climate. Fifth, there are effect on team cohesion with state self-confidence. Sixth, there are effect on team cohesion with competitive state anxiety, motivation climate and state self-confidence. This thesis shoes that the competitive state anxiety affects, especially, the task cohesion negatively, and that the motivation climate and the state self-confidence are important in maximizing the team cohesion. In conclusion, I suggest that coaches should establish the effective strategies in order to overcome athletes' anxieties, to stimulate their motivation and to increase their self-confidence.

급성 신우신염의 임상 양상과 항생제 내성에 대한 고찰

김정수,조영일,송종오 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

Acute pyelonephritis(APN) is defined as a symptomatic bacterial infection of the upper urinary tract. The diagnosis of APN may be difficult due to the lack of symptoms or to a atypical manifestations and its delayed treatment may lead to sepsis. Therapy of APN needs empirical antibiotic treatment and it is very important to choose appropriate sensitive antibiotic. The authors thereby studied clinical features and diagnostic criteria of APN and compared the relationship between the result of culture positive and several clinical parameters. And also studied sensitivity rate of various antibiotics to cultured bacteria. APN was a disease of female. The 161 cases of total 175 cases were female. Most common clinical manifestation was fever and chills(89%). Costovertebral angle tenderness(69%), flank pain(60%), nausea(39%), vomiting(35%), dysuria(31%) were frequently observed clinical manifestations. Positive results of urine culture was statistically related to urine nitrite(p=0.001), systemic leukocytosis(p=0.023) and positive urine leukocytes(p=0.001). High positive rate(70%) and strong relation with culture positive made urine leukocytes as a reliable diagnostic parameter. Most commonly cultured bacteria was Escherichia coli(78.9%). Sensitive antibiotics to Gram negative bacteria were amikacin(98%), cefoxitin(93%), cefuroxime(92%), ceftriaxone(93%), timentin(93%), ciprofloxacine(92%), ofloxacine(93%). Ampicillin sensitivity to Gram negative bacteria was only 39%. Most effective antibiotic combinations for treatment of APN seemed intravenous second generation cephalosporine and aminoglycoside and following oral quinolone.