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      • RISS 인기논문

        수면량과 집중력의 상관관계

        김병우,류지근,박우진,박계원,김미정,임지은,백대현,최재덕,최윤호,이가현,이관,김덕수 東國大學校醫學硏究所 2002 東國醫學 Vol.9 No.1

        수면, 기억 그리고 학습의 연관성은 실제 매우 복잡하다. 많은 연구에도 불구하고 명확한 연구결과는 아직 없다. 우리는 이 연구에서 평소와는 달리 시험 전날 수면 변화 양상이 집중력에 어느 정도 영향력을 미치는지 알아보고자 하였고, 이를 이용해 효율적인 수면 관리를 할 수 있는 기초자료로 삼고자 하였다. 동국대 의대 본과 1학년생 중 지원자 30명과 본과 2학년생 10명을 대상으로 평상시 상태와 시험 직후 수면이 부족한 상태에서 각각 K-PES TEST를 실시하여 총 8항목에 걸쳐 암기력, 판단력, 단순반응의 변화정도를 검사하였다. 또 설문조사를 병행하여 결과에 영향을 미칠 수 있는 다른 인자들도 파악하였다. 수면량에 대한 부호 숫자 짝짓기(순간 판단력)을 검사한 결과, 인간의 최대 생리학적 기능은 꼭 수면부족에 의해 좌우되는 것은 아니다. 그러나, 수면감소는 피로를 증가시키고, 동기부여를 감소시키나 단, 새로운 사실을 학습하는 데에는 큰 영향을 끼치지 않는다. 즉, 수면부족으로 장시간 깨어있는 것은 정확성과 반응성을 떨어뜨린다. 흡연에 대한 부호 숫자 짝짓기(순간 판단력)을 검사한 결과, 니코틴의 수면에 대한 상호관계는 알려지지 않았고, 인간의 감정이나 의식, 인식에 영향을 주는 것으로 알고있지만, 장기적은 측면에서 흡연이나 알코올은 인식능력과 무관한 것 같다. 카페인에 대한 숫자 외우기(암기력)검사 결과, 카페인은 spacial selective attention에는 특별한 영향을 주지 않지만 지각과정이나 주의 집중에 큰 효과를 주며, 인간의 의식 수행에 긍정적인 효과를 준다. 즉 카페인은 활력, 혼란, 피로상태를 변화시키고 visual analog scales에서 휴식상태에 가까운 양상을 나타낸다. 또 48시간 동안 수면을 취하지 않은 사람에게 카페인은 집중력과 장시간의 좋은 기분을 유지하게 하였다. 그러나 규칙적, 비규칙적으로 먹는 사람간에는 인지수행력의 차이를 보이지 않으며 상용자에서는 상당한 내성이 보인다. 수면패턴에 대한 숫자 더하기(순간 판단력)검사 결과, 집중력은 수면패턴에 의해서도 영향을 받고, 수면패턴이 바뀌게 되면 순간판단력을 저하시킨다. This study was performed to evaluate relationship of sleep and attention, and to control sleep effectively. We conducted a K-PES test of 40 medical students. K-PES contains eight elements, for example, simple response, selective response, color pairing, OddEven discrimination, number addition, number-symbol matching, memory, right-tapping, left tapping. Through these, we tested changes of memory, judgement, simple response. And we conducted a questionnaire survey to exclude bias. Results are as follows. As a results of number-symbol matching test, we know that sleeplessness is not complete responsible for physiologic function for humans. But, decreased sleep increases fatigue and decreases motivation, but no influence on learning new materials. So, long term sleeplessness decreases precision and responsibility. As a results of number-symbol matching test on smoking, a relationship of nicotine and sleep is not certain. A point of view in long term period, smoking and drinking is not related cognition, even if we know that those influence mood, consciousness and cognition. As a results of memory work test on caffeine, caffeine does not influence spacial selective attention, but mainly does perception, attention and consiousness process. Namely caffeine changes energetic activities, chaos, fatigue states and shows resting state in visual analog scales In sleeplessness for 48 hours, caffeine produced attention and good mood for a long time. But, in case of cognitive process no significance shows in regular or irregular diet. Regular diet shows high resistance. As a results of number addition test on sleep patterns, seep patterns influence attention, changes of sleep patterns decrease a moment judgement.

      • KCI등재

        수출입 컨테이너 장치장 배정을 위한 소프트웨어의 개발

        김갑환,김홍배,홍봉희,김기영,배종욱,최진오,김두열,이영기,박영만,박강태,손행대 한국경영과학회 1995 經營 科學 Vol.12 No.3

        The Pusan Container Terminal faces a rapid increase in berthing time of container ships as well as in waiting time of external trucks, which is due to an absolute lack of yard space. This research is focused on the development of a decision support system for the planning of the container terminal yard assignment so that the yard space would be utilized most effectively. Efforts should be given to the reasonable assignment of the yard storage and the dynamic adaptation to the ever changing environment. The software introduced here is based o the know-how of the field exports and its framework takes the approach of the hierarchical decision making.

      • 게우젓 製造에 關한 硏究(II) : 熱成중 呈味成分 및 組織學的 變化 Changes in Teste Compunds and Histological Properties during Fermentation

        金成洙,河璡桓,姜永周,金洙賢,金永東,宋大鎭 제주대학교 1990 논문집 Vol.30 No.-

        To evaluate the composition of Gae-Woo Jeot which is one of important traditional salted and fermented sea foods in Cheju Do, changes of nucleotides and their related compounds, free amino acids, TMAO(trimethylamine oxide), TMA(trimethylamine) contents and histological properties during fermentation was examined. AMP was as high as 3.6?mole/?? in raw small abalone but IMP content was only trace while hypoxanthine and IMP was dominant in raw topshell-4.5 mole/?? and 4.3??mole/?? respectively. Hypoxanthine was predominant in 65 days fermented Gae-Woo Jeot. Main amino acid in Gae-Woo Jeot were glycine, arginine, glutamic acid, alanine, valine and histidine in order. These were consisted 50~60% of the total free amino acid while phenylalanine, tyrosine, methionine and isoleucine were poor in content. During fermentation TMAO decreased slowly and eventually disappeard within 85 days while TMA was increased until 65 days and started to decrease down to 6~9mg%. Muscle texture showed the disappearance of elasticity soon after the adding of 10% salt while no change of texture was oberved until 50 days of fermentation in 20% salt group.

      • 복발효 감식초의 품질

        김미경,김미정,김소연,정대성,정용진,김순동 대구효성가톨릭대학교 식품과학연구소 1994 식품과학지 Vol.6 No.-

        고품질의 감식초를 농가에서 자가생산하기 위한 기초적 자료를 마련할 목적으로 자연발효시킨 경우와 복발효시킨 경우의 품질을 비교하였다. 그 결과 복발효시킨 식초는 자연발효 식초에 비하여 초산농도가 1/2인 3%정도였다. 그리고 HPLC 법으로 측정한 유리당의 총함량은 자연발효 식초는 6%, 복발효시킨 것은 5%였다. 감식초내에 함유된 유기산류로는 oxalic acid, malic acid, lactic acid, citric acid, succinic acid, glutaric acid 등 이었으며 자연발효시킨 경우가 전반적으로 함량이 높았다. 특히 자연 발효시킨 경우 lactic acid함량이 높았다. 그러나 감과실의 flavour와 과실의 고유색상과 맛은 복발효시킨 경우가 강하게 나타났다. To prepare the basic information for the fermentation of high quality persimmon vinegar in the farm, the quality of the complex fermented persimmon vinegar(CFPV) was compared to that of naturally fermented persimmon vinegar(NFPV). The titratable acidity of the CFPV was 3% which was the half concentration of the NFPV. The content of total free sugar by HPLC was 6% in CFPV and NFPV was 5%. Organic acid compositions in persimmon vinegar were oxalic acid, malic acid, lactic acid, citric acid, succinic acid and glutaric acid in addition to acetic acid. Total content of the organic acids in NFPV was higer than that in CFPV. Especially, the content of latic acid in NFPV was very higher than that of CFPV. The flavour, color and taste of persimmon fruit itself in CFPV were stronger than those in NFPV.

      • 생체분해성 망막압정을 이용한 망막고정에 대한 실험적 연구

        김용백,민병무,김창식,박근성,김승영,길숙종,조항진,이성복,노승무,송규상,강대영,조준식,양준묵,정경수,최선웅,이진호,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

        Biodegradable retinal fixation devices obtain mechnical fixation of the retina with desirable chorioretinal scarring and with the potential for local, sustained release of antimetabolites and steroids to inhibit proliferative vitreoretinopathy. We manufactured a biodegradable retinal tack with barb that was designed in order to prevent intrusion from implantation of retinal tacks. This study was carried to evaluate the efficacy for retinal fixation and the capability for sustained release of drugs with a newly designed biodegradable retinal tack Biodegradable retinal tacks were made of polymers of glycolic acids and were designed with barbs in a shape to prevent the disinsertion. Biodegradale retinal tacks are divided into 3 parts, a conical portion that is inserted into the sclera, a cylinder portion that remains in the vitreous, and a neck portion between the pin and the cylinder. The tapered conical end was manufactured to allow easy insertion through the retina and choroid into the sclera. A cylinder portion was manufactured with a tapered angle that fixes firmly into the orifice of 19 gauge spinal needle. A neck portion, 0.4 mm in diameter, was designed to prevent disinsertion from following implantation of retinal tack. The applicator was a 19 gauge spinal needle and its orifice was prepared to 15°angle to accept the tapered cylinder portion of the retinal tack. The retinal tacks, secured in the needles, were passed through the formed vitreous and inserted into the retina, choroid, and sclera and were released by pushing the internal needle, usually within 2-3mm of the medullary ray of the posterior rabbit retina A retinal tack was placed in each of 8 pigmented rabbit eyes. Slit-lamp biomicroscopy, indirect ophthalmoscopy and fundus photography were performed periodically from 1 day to 8 weeks after surgery. Eight eyes were enucleated and studied by light microscopy at 8 weeks. Biomicroscopic evaluation of the animals revealed edemas adjacent to the retinal surfaces immediately after insertion of the biodegradable retinal tacks in all the animals. These edemas disappeared after 1 week. The first noticeable change in the size of retinal tacks was shown after 2weeks. The size of the retinal tacks gradually got smaller, decreasing to about one-half at 4 weeks and about one-third at 8 weeks. All retinal tacks remained in inserted places without any movement for an 8 week period. On light microscopy, epiretinal proliferations were seen to extend into the vitreous cavity. Cellular capsules that lined the inner aspect of the scleral defect caused by tack insertion were found. However the adjacent retina had a normal cytologic appearance and architecture in all specimens. We manufactured a biodegradable retinal tack that is designed to prevent intrusion from implantation of retinal tacks. All biodegradable retinal tacks reduce in size with time, but no retinal tacks extruded from the inserted place. The newly designed biodegradable retinal tack can be used for retinal fixation and may be used as a vehicle for the introduction of pharmacologic agents to prevent the cellular events that promote proliferative vitreoretinopathy.

      • ZnO:In 가스 감지막의 특성 및 응용

        김영범,박종아,김진해,김권태,김정규,마대영,박기철 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-

        The microsensors to detect NH3 gas were fabricated by continous deposition of In film by evaporation and ZnO film by rf magnetron sputtering onto the Si3N4 diaphragm that was prepared by MEMS technology. The sensors were heat-treated to dope In into the ZnO thin film. The electrical characteristics of sensitive films were studied as a function of heat-temperature by 4-point probing method and electrometer. The dependence of the sensitivity, selectivity and time response of sensor on heat-treatment temperature was investigated. The microsensor heat-treated at 400℃ that 3000 A ZnO:In film was chosen as gas sensitive film, showed the highest sensitivity 23% at 350ppm NH3 under 366mW heater power. The time response was 90sec. The sensitivity for CO and NOx was not observed.

      • KCI등재
      • SCIESCOPUSKCI등재
      • KCI등재

        농촌지도공무원의 역량수준 진단

        김진모,주대진,길대환 한국농업교육학회 2008 농업교육과 인적자원개발 Vol.40 No.1

        이 연구의 목적은 농촌지도공무원들의 역량을 진단하는데 있었다. 이를 위해 김진모(2006)가 제시한 농촌지도공무원의 역량모델을 바탕으로 개별 역량의 정의문을 질문문항으로 개발하였고,이를 전체 농촌지도공무원이 역량에 대한 숙련도 수준을 참고하여 각 문항별로 자신의 수준을 자기평가하도록 하였다. 이 연구의 주요 결과는 다음과 같다. 첫째,우리나라 농촌지도공무원의 역량수준은 개발목표 대비 그리 높은 수준은 아니었다. 따라서 현재의 역량수준을 획기적으로 제고할 수 있는 노력이 조직 및 개인 차원에서 시급히 이루어져야 한다. 오늘 날 농촌지도사업의 성패는 농촌지도공무원의 역량에 따라 좌우된다고 해도 과언이 아니기 때문이다. 둘째,연령과 근무기간이 많아질수록 역량지수는 상대적으로 낮았다. 이는 신규지도사의 선발 이후 전문성을 체계적으로 개발할 수 있는 조직적 차원의 지원이 필요함을 보여준다. 조직적 차원의 지원으로는 계층별로 맞춤화된 다양한 역량강화 방안 등을 고려할 수 있을 것이다. 셋째,역량진단을 통해 우선적으로 강화시켜야 할 역량들은 기초직무 역량군에 속하는 여러 역량들과 전문직무 역량군의 기술/주제 전문성 등이었다. 이러한 역량들을 효과적으로 개발하기 위해서는 정규교육만으로는 한계가 많기 때문에 다양한 형태의 육성방안을 모색해야 한다. 이상의 연구결과가 실제적으로 활용되기 위해서는,우선 농촌지도 공무원의 역량 중심 계충 교육과정을 개발하여 실시해야 한다. 또한,농촌지도공무원의 경력개발 체계를 수립하여 실시하고,이들의 부족한 역량을 강화시켜 줄 수 있는 다양한 방법들을 개발하여 실천하려는 노력이 수반되어야 한다. The purpose of this study was to evaluate the competency levels of rural extension workers in Korea. A survey questionnaire was developed using a Competency Model by Dr. Kim(2006), and a self-test was conducted for all of the extension workers in Korea. Based on the findings of this study, the major conclusions were as follows. First, the competency levels of rural extension workers in Korea were not so high for their development goal. The organizational and personal efforts were urgently made for dramatically raising the present competency level. Second, the higher the age and the working period were, the lower their competency index were. It shows that the organizational support is needed for systematically developing the expertise of rural extension workers after being employed as new rural extension workers. Third, the main competencies that should be first strengthened through competency assessment were several competencies in foundational competency cluster and a subject-matter expertise in technical competency cluster. Various forms of strategies for developing these competencies should be sought because the only formal training is not enough to effectively develop these competencies. To practically utilize the result of this study, the following measures should be taken. First, a competency-based curriculum by position level for rural extension workers was developed and implemented, In addition, career development systems for rural extension workers were set up and carried out, and the efforts to develop and apply the various approaches for their insufficient competencies should be made.

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