• 제목/요약/키워드: grades 3-4

검색결과 1,107건 처리시간 0.031초

화절층내 석회질 단괴(團塊)의 스카른화와 심부잠두(深部潛頭) 광체와의 관계 (Relation of the Skarnized Calcareous Nodules in the Hwajeol Formation and the Deep Concealed Orebody)

  • 문건주
    • 자원환경지질
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    • 제24권4호
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    • pp.335-346
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    • 1991
  • It is observed that calcareous nodules of the Hwajeol Formation are locally skarnized in the Sangdong district, in which the skarn mineralization extends 5 Km westward from the Sangdong mine area to the Hwajeolchi area. After a hidden granite beneath the Sangdong mine was discovered by exploration drillings, the exploration teams of the Sangdong mine and the Korean Mining Promotion Corporation have assumed that the skarn nodule of the Hwajeol Formation was derived from emplacement of a granite in deep place and the occurrence of hidden ore bodies below the skarn, and they have discovered high grades of tungsten orebody in the same horizon of the Sangdong ore body. Mutual genetic relatioships between epidote and garnet may be explained by following chemical reactions $Ca_2FeA_{12}$ $Si_3O_{12}(OH)+CaCO_3=Ca_3(Fe,\;Al)_2$ $SiO_{12}+1/2CO_2+1/2H^+Ca_3FeSi_3O_{12}+SiO_2+CO_2=2CaFeSi_{12}O_6+CaCO_3+1/2O_3$. It is concluded that epidote and garnet are useful as target minerals indicating a potential occurrence of deep seated hidden ore body. Since the epidote may inform the emplacement of the granite, while the garnet in the skarn nodule of the Hwajeol Formation may reflect a strong hydrothermal mineralization taking place from the depth.

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목포항의 수질 및 부영양도의 계절 변화 (Seasonal Variations of Marine Water Quality and Eutorphication Index in Mokpo Harbour)

  • 김광수
    • 한국해양환경ㆍ에너지학회지
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    • 제4권3호
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    • pp.3-15
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    • 2001
  • 목포항의 수질과 영양상태의 계절 변화를 구명하고 평가하기 위하여 1996년 8원부터 1999년 8월까지 3년간 현장 관측과 수질 분석을 실시하였다. 첫째, 투명도, 용존무기질소, 인산인 및 클로로필 a와 같은 수질 항목에 대하여 OECD 영양분류기준을 적용한 결과, 목포항 해수의 영양수준은 4계절 내내 중영양 내지 부영양 상태로 평가되었고, 특히 하계에는 부영양 상태로 나타났다. 둘째, 비록 목포항 수질은 화학적 산소요구량에 의하면 해역수질 환경기준의 2급수 내지 3급수로 평가되지만, 부영양화에 의한 오염지수를 산정한 결과에 의하면, 목포항은 수질이 악화되어 4계절 내내 3급수에도 미치지 못하는 것으로 나타났다. 셋째, 부영양도를 산정한 결과, 특히 하계 또는 추계에 목포항에서 적조 발생 잠재력이 높은 것으로 나타났다. 넷째, 해수중에 존재하는 인에 대한 질소의 평균원자비(N/P)를 살펴보면, 목포항에서 식물플랑크톤의 성장에 대한 제한 영양 인자는 질소라기보다는 인으로 나타났다

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환자 개인정보보호에 대한 치위생 전공 학생의 인식도 (Awareness of Dental Hygiene Department Students regarding the Protection of Patients' Personal Information)

  • 조명숙;이성숙
    • 대한치위생과학회지
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    • 제4권1호
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    • pp.89-98
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    • 2021
  • Background: The purpose of the present study was to gather basic data necessary for developing an educational program regarding the protection of patients' personal information. Such a program would stress the importance of the protection of patients' personal information for dental hygiene students obtaining clinical practice. Methods: A self-reported questionnaire-based survey was conducted targeting dental hygiene undergraduates who were obtaining clinical practice in the capital region. A total of 543 questionnaires were included in the analysis. Results: The results of this study were as follows: 1) the average score for awareness of the Patient Privacy Act was 2.93 on a 4-point scale; 2) the average score for the recognition of the protection of patients' personal information was 3.22 on a 4-point scale; 3) the area-based perception of the protection of patient's personal information was 3.37 points for communication, which scored highest, followed-by the linked-work area at 3.27 points, the patient's information management at 3.22 points, and the direct dental hygiene work at 3.18 points; 4) with regard to awareness of the protection of patients' personal information according to general characteristics, the perception was higher in the advanced academic year (p < 0.01), in those who had education regarding the protection of patients' personal information at both the university and the clinical practice institution (p < .05), and in those with higher grades (p < 0.01). Conclusions: Based on the above findings, the development and application of an educational program to improve awareness of the protection of patients' personal information are considered to be necessary by both universities and clinical practice institutions.

보리 파성 Near-isogenic Line 간의 출수 및 주요 형질비교 (Comparison among Traits Related to Heading of Barley Near-isogenic Lines for Growth Habit)

  • 천종은;박문웅;이은섭
    • 한국작물학회지
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    • 제35권1호
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    • pp.16-22
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    • 1990
  • 5월 보리와 조강 Near-isogenic line을 선발, 계통화하여 파성정도, 일장반응성 및 포장에서 출수관련형질을 조사하였다. 1. 5월보리는 밀장 006에서 조강보리는 Hiproly나 상주백과쪽에서 파성유전자가 각각 유래된 것으로 추측되었다. 2. 5월보리 #1과 #2, 조강보리 #1과 #2은 파성 I로, 5월보리 #3과 #4, 조강보리 #3과 #4은 파성III으로 각각 분류되었으며, 5월보리 #1과 #2은 1쌍의 파성 열성유전자(sh)에 의해 파성이 발현된 것으로 생각된다. 3. 동일한 유전적 배경을 가진 isogenic line의 일장반응성, 협의의 조만성 및 출수지연율은 계통간 통계적 유의성이 인정되지 않았다. 4. 실외 추파시 isogenic line간에 출수기와 성숙기의 차이가 인정되었으며, 3월 11일 이후 춘파시 춘파성정도의 강ㆍ약에 따라서 같은 계통내 출수개체와 좌지된 개체가 함께 관찰되었다.

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일부(一部) 대학생(大學生) 신체발육(身體發育) 및 건강상태(健康狀態)에 관(關)한 조사(調査) (A Study on the Physical Growth and Health Status in University Students)

  • 권이혁;차철환
    • Journal of Preventive Medicine and Public Health
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    • 제1권1호
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    • pp.67-78
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    • 1968
  • For the purpose of ascertaining the status of physical growth and health status of the University students, a intensive survey was conducted by the authors towards a total of 2,638(male; 2,228, female; 410) who passed the written entrance examination at the Seoul National University. The items included the measurements on physical growth, various physical indixes, visual acuity, tuberculosis and dental status. The findings and results can be summarized as follows: 1. Physical Growth No significant difference was found in the physical growth between classes(literature and science) and by ages. In males, the means of body height, body weight, chest-girth and sittingheight were $168.0{\pm}5.07cm,\;55.7{\pm}5.71kg,\;85.8{\pm}4.4cm\;and\;91.5{\pm}2.21cm$, respectively. In females, these were $157.4{\pm}4.57\;cm,\;00.4{\pm}5.75kg,\;80.3{\pm}4.51cm\;and\;86.1{\pm}3.30cm$, respectively. Basing on the above measurements several physical indixes were calculated as follows ; Relative body weight 33.15 in males and 32.02 in females. Relative chest-girth 51.07 and 51.01, relative sitting-height 54.46 and 54.70 $R\ddot{o}hrer$ index 1.00 and 1.02, Kaup index 1.97 and 2.04, Vervaeck index 83.63 and 83.03, and Pelidisi index 89.94 and 92.45. 2. Visual Acuity Among the students of science classes those of 0.8 and below in vision on left and right occupied 46.4% and 45.0%, those of 0.6 and below 39.1% and 41.2%, respectively. Among the students of literature classes those of 0.8 and below occupied 46.3% and 42.9%, and those of 0.6 and below occupied 41.4% and 39.0, respectively. In males those of 0.8 and below occupied 46.8% and 44.5% and 0.6 and below occupied 41.9% and 39.7%, while in females 0.8 and below occupied 43.9%, and 42.4%, and 0.6 and below occupied 38.3% and 37.3%, respectively. In males those of 0.8 and below in corrected vision occupied 12.1% and 10.3%, while in females 12.9% and 12.2%, respectively. More students of abnormal vision were found among science classes and the proportions of corrected vision were 38.9% and 37.4% in males, and 33.9% and 33.2% in females, respectively. 3. Tuberculosis Among the total, 55 students were diagnosed as tuberculosis, of whom 50 were minimal cases, 2 were moderately advanced cases and 3 were far advanced cases. 4. Dental Status Among the total, 81.2% were of decayed teeth, 20.8% filled, 9.5% missed, 5.0% extraction needed, 9.1% sunplatinum bridges, 3.3% golden bridges and 5.5% golden inlay. Regarding tartar on teeth moderate, heavy and light grades occupied 49.5%, 29.7% and 20.3%, respectively and 0.8% had none. 5. Comprehensive evaluation According to criteria 4 grades were applied to comprehensive evaluation as follows : A...excellent in physical status B...with some physical defects but no difficulties in study C...need treatment D...need treatiment and rest Out of the total, A grade occupied 21.6%, B 76.2% and C. and D 2.2.

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Differences in Career Decision Self-Efficacy according to the Motives for Major Selection among Dental Hygiene Students

  • Mi-Sook Yoon;Bo-Young Park
    • 치위생과학회지
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    • 제22권4호
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    • pp.256-263
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    • 2022
  • Background: The purpose of this study was to confirm the major motivation for and self-efficacy of career decisions among dental hygiene students and to analyze differences in career decision self-efficacy according to the major motivation. Methods: An online survey was conducted among 194 dental hygiene students. To investigate career decision self-efficacy, 18 questions were posed, including 5 questions on future planning, 4 questions on self-evaluation, 4 questions on job information collection, 3 questions on goal setting, and 2 questions on problem solving. The survey was conducted using a 5-point scale. Results: The motives for choosing a major were a high employment rate (68.6%), a desire to become a professional (36.1%), according to aptitude (27.8%), recommendations by others (26.3%), and according to grades (12.9%). The career decision self-efficacy of the study participants was in the order of self-evaluation factors (3.75 points), problem solving factors a (3.62 points), job information collection factors (3.59 points), future planning factors (3.46 points), goal setting factors (3.44 points) score was high. The career decision self-efficacy scores were higher when the major motivation was "because I want to become a professional" and "because I think I have an aptitude for it." Conclusion: It is necessary to give students who wish to major in dental hygiene an opportunity to consider whether they have an aptitude for it by providing information on not only major subjects but also the duties and roles of dental hygienists. In addition, it is necessary to develop a career education program to help dental hygiene students set their career goals.

비신호교차로의 교통사고 분석 (청주시를 사례로) (Analysis of Traffic Accidents at Unsignalized Intersections in case of Cheongju)

  • 박병호;김희식;임민희;박상혁
    • 대한교통학회지
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    • 제25권5호
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    • pp.67-77
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    • 2007
  • 본 연구는 청주시 비신호교차로의 교통사고를 다루고 있다. 연구의 목적은 비신호교차로의 도로환경요인이 교통사고에 미치는 영향과 사고특성을 분석하는 것이다. 청주시의 3지와 4지 비신호교차로를 대상으로 상관분석을 시행한 결과, 3지의 경우에는 교통량과 시거요인, 그리고 4지는 교차각, 최대종단경사와 시거요인이 교통사고와의 상관관계가 높게 나타나고 있다. 또한 다중선형과 다중비선형 회귀분석 결과, 3지의 경우 교통량과 이중정지선의 수가 증가할수록 사고가 증가하며, 4지의 경우 교차각이 $90^{\circ}$에 가까워질수록 사고가 감소하고, 최대종단경사가 높을수록 사고가 많이 발생한다. 이와 같은 분석결과는 청주시의 장래 교차로 개선사업에 중요한 단서를 제공하게 될 것으로 기대된다.

Flupyrazofos 원제 및 정제품의 불순물 조성과 Acetylcholinesterase에 대한 저해 비교 (Inhibition of acetylcholinesterase activity by impurities in technical grades and purified flupyrazofos)

  • 유경렬;조부연;박동식;허장현
    • 농약과학회지
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    • 제9권1호
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    • pp.97-101
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    • 2005
  • 피라졸 계통의 유기인계 살충제인 flupyrazofos(O,O-diethyl O-1-phenyl-3-trifluoromethylpyrazo-5-yl phosphorothioate)의 합성공정에서 생산된 원제 1(95.4%), 원제 2(97.6%) 그리고 정제품(99.2%)에 대한 불순물 조성과 함량을 조사하였으며, 이들 원제 및 정제품을 이용하여 in vitro와 in vivo 상에서 acetylcholinesterase (AChE) 활성 저해 정도를 비교 검정하였다. 실험결과 불순물의 조성은 O,O,O-triethylthio-phosphoric acid (TEA), 1-phenyl-3-trifluoromethyl-5-ethoxy pyrazole(PTMEP), O,O-diethyl O-1-phenyl-3-trifluoromethylpyrazo-5-yl phosphoric acid ester(flupyrazofos oxon), O,S-diethyl O-1-phenyl-3-trifluoromethylpyrazo-5-yl phosphorothionate (S-ethyl flupyrazofos)이었으며, 이들 불순물들의 함량이 원제 중에서 전반적으로 높았다. In vitro 상에서 AChE 저해는 불순물들이 많은 원제 1에서 가장 빠르게 저해되었으며, 생쥐 뇌 AChE (in vivo)에 대한 $I_{50}$ 값은 원제 1과 2가 정제품 보다 40% 이상 높았다. 이는 정제품에 비하여 원제 중에 더 많이 함유된 flupyrazofos oxen과 S-methyl flupyrazofos에 의한 영향일 것으로 판단되었다.

다변하천평가기법의 적용을 통한 부산시 도시하천 평가연구 (A Study on Urban Streams in Busan through Application of Multilateral Stream Assessment)

  • 신현석;신동수;손태석;강두기
    • 한국물환경학회지
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    • 제25권2호
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    • pp.235-244
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    • 2009
  • The purpose of this study is to offer information about the current river conditions and basic data of streams in Busan city, by selecting 20 underground streams and evaluating their multilateral stream assessment. Concerning the evaluation of streams, 4 sections including the general index, the bank index, the river characteristic index, and the ecological environment characteristic index were evaluated. Ahead of the evaluation, the study divided Busan city into 4 zone for a systematic river investigation. Then, the study allocated code names to each river, and conducted literature research and a field survey of streams. Based on this, the study applied the evaluation of multilateral stream assessment. As a result, out of 4 entire grades, there was no grade 1 or grade 2. Instead, 35% were grade 3, 60% were grade 4, and 5% were grade 5. When looking into the evaluation results by Zone, the Dongbusan Zone showed the highest index, and the Suyeonggang Zone, the Jungbusan Zone, and the Nakdonggang Zone followed, in order.

공항 수.배전설비 제어시스템 표준화 (The Control System Standardization for Airport Electric Power Receiving and Distribution Facility)

  • 송영주;최홍규
    • 조명전기설비학회논문지
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    • 제20권4호
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    • pp.123-130
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    • 2006
  • 국내공항의 경우 전기설비의 중요도에 비해 이에 대한 설계기준이나 표준지침이 제대로 갖추어지지 않아 오늘날 공항의 건설, 공항시설의 확충, 증설시에 체계적이고 표준화된 수 배전설비를 갖추기 어려운 실정이다. 따라서, 본 논문에서는 국내공항을 Code화에 의한 4등급으로 분류하고 수 배전설비에 대한 정의 및 적용범위를 설정한 후 기존 공항의 수 배전설비에 대한 문제점을 분석하고 공항 수 배전설비 제어시스템 기준과 공항 등급별 3단계 방안을 제시하여 공항등급별 표준 단선 결선도를 작성한 다음 단선 결선도에 따른 공항 수 배전설비 시설기준을 제시한다.