• 한국수산과학회지
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• 제26권6호
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• pp.557-566
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• 1993

한국연안해역 표층퇴적물중의 유기물함량 분포특성을 밝히기 위하여 1993년 2월에 총117개 정점에서 중력식 corer로 채취한 표층퇴적물 시료에 대해서 유기탄소와 질소함량, 강열감량, 화학적산소요구량, phaeopigment 및 총황화물량을 측정하였다. 표층퇴적물중 유기 탄소 및 질소함량은 각각 $0.03{\sim}5.41\%$(평균 $1.08\%$), $0.01{\sim}0.44\%$(평균 $0.18\%$) 범위였는데 진주만에서 부산항사이의 남해동부연안역에서 각각 평균 $2.18\%$와 $0.23\%$로서 한반도 주변해역중 가장 높았고 금강에서 동진강에 이르는 군산연안 해역이 각각 평균 $0.17\%$와 $0.03\%$로 가장 낮은 분포였다. 주요인 분석의 결과는 조사해역의 표층퇴적물중 유기물함량 분포특징을 잘 나타냈는데 유기물 함량 즉 부영양화의 정도에 따라 서해와 남해동부해역이 뚜렷이 구분되며 부산항과 마산만 입구에서의 높은 C/N비는 이 수역이 인근 도시의 생활하수나 산업폐수의 영향을 크게 받고 있음을 보여준다. 또한 마산만내의 표층퇴적물은 높은 황화물량을 보여 다른 해역과 뚜렷이 구분된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제41권
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• pp.4.1-4.10
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• 2019

Background: The mandibular third molar (M3) is typically the last permanent tooth to erupt because of insufficient space and thick soft tissues covering its surface. Problems such as alveolar bone loss, development of a periodontal pocket, exposure of cementum, gingival recession, and dental caries can be found in the adjacent second molars (M2) following M3 extraction. The specific aims of the study were to assess the amount and rate of bone regeneration on the distal surface of M2 and to evaluate the aspects of bone regeneration in terms of varying degree of impaction. Methods: Four series of panoramic radiographic images were obtained from the selected cases, including images from the first visit, immediately after extraction, 6 weeks, and 6 months after extraction. ImageJ software^® (NIH, USA) was used to measure linear distance from the region of interest to the distal root of the adjacent M2. Radiographic infrabony defect (RID) values were calculated from the measured radiographic bone height and cementoenamel junction with distortion compensation. Repeated measures of analysis of variance and one-way analysis of variance were conducted to analyze the statistical significant difference between RID and time, and a Spearman correlation test was conducted to assess the relationship between Pederson's difficulty index (DI) and RID. Results: A large RID (> 6 mm) can be reduced gradually and consistently over time. More than half of the samples recovered nearly to their normal healthy condition (RID ≤ 3 mm) by the 6-month follow-up. DI affected the first 6 weeks of post-extraction period and only showed a significant positive correlation with respect to the difference between baseline and final RID. Conclusions: Additional treatments on M2 for a minimum of 6 months after an M3 extraction could be recommended. Although DI may affect bone regeneration during the early healing period, further study is required to elucidate any possible factors associated with the healing process. The DI does not cause any long-term adverse effects on bone regeneration after surgical extraction.

• Journal of Preventive Medicine and Public Health
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• 제18권1호
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• pp.1-11
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• 1985

A decade ago a survey on the population-base incidence rate of anthracite coal gas (mainly carbon monoxide) poisonig in Seoul area was investigated, resulting in the incidence rate of 306/10,000 risk population and 1 death/10,000. Another survey on the carbon monoxide poisoning was investigated during 1 year period from Apr. 1983 to Mar. 1984. Total subjects of risk population were 67,740 households covering 353,287 persons. The major findings of this survey are as follows: 1. Household-base incidence rate was 8.4% spell-base 10.4%. 2. The incidence rate was the highest in houses having each of slate roof, cement wall, vinyl floor of bedroom and direct 'ondol' heating system. 3. Average 2.1 person was attacked from one incidence of the poisoning; severity-wise person-base incidence rates per 10,000 were 352 in mild poisoning, 54 in severe poisoning and 1.4 in death-overall incidence rate 407. Several facts were identified which supported that this figure was moderately underestimated. As the incidence of the poisoning is affected by socioeconomic and environmental factors, it is natural that one expects the incidence will decrease in proportion to genernal improvement of the above factors. Thus the results of these two surveys seemed preposterous. But further study suggested that the incidence rate (306/10,000) decade before had been significantly underestimated and corrected-rate should have been 478/10,000 level. 4. Age and sex distribution by the degree of the poisoning was uniform with little statistical difference; overall incidence rates by sex were 339/10,000 in male and 475/10,000 in female with significant statistical difference(p<.01). 5. 5.3% of the patients were treated at hospital or local clinic; 3.0% of the patients were hospitalized. Admission rate in comatose patient(severe poisoning) was 14.2%. In conclusion, carbon monoxide poisoning remains a major health problem by now.

• 천문학회보
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• 제42권1호
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• pp.40.1-40.1
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• 2017

The NISS (Near-infrared Imaging Spectrometer for Star formation history) is the near-infrared spectro-photometric instrument optimized to the Next Generation of small satellite series (NEXTSat). To achieve the major scientific objectives for the study of the cosmic star formation in local and distant universe, the spectro-photometric survey covering more than 100 square degree will be performed. The main observational targets will be nearby galaxies, galaxy clusters, star-forming regions and low background regions. The off-axis optics was developed to cover a wide field of view ($2deg.{\times}2deg.$) as well as the wide wavelength range from 0.95 to $2.5{\mu}m$, which were revised based upon the recent test and evaluation of the NISS instrument. The mechanical structure were tested under the launching condition as well as the space environment. The signal processing from infrared sensor and the communication with the satellite were evaluated after the integration into the satellite. The flight model of the NSS was assembled and integrated into the satellite. To verify operations of the satellite in space, the space environment tests such as the vibration, shock and thermal-vacuum test were performed. The accurate calibration data were obtained in our test facilities. Here, we report the test results of the flight model of the NISS.

• 대한공업교육학회지
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• 제34권1호
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• pp.44-86
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• 2009

이 연구의 목적은 공업 입문 4종 교과서의 내용 요소별 특징을 비교하여 각 교과서의 장점과 단점을 분석해보고, 그 분석된 데이터가 새로운 공업입문 교과서 개발에 활용될 수 있도록 하기 위함이었다. 궁극적으로는 현직교사는 물론 예비교사와 교육연구자들이 (ㄱ) 교과서 관련 교안 연구의 기초자료로서 사용할 수 있도록 하며, (ㄷ) 대학수학능력시험 직업탐구영역의 문제 출제와 (ㄷ) 전공과 연계성을 갖는 차기 공업입문 교과서 편찬에 있어서 좋은 시사점을 제공하는 것이었다. 주로 사용된 연구 방법은 문헌 연구로서 현행4 종의 공업입문 교과서를 비롯하여 관련 문헌을 비교 분석하는 것이었다. 연구 결과, 비교된 모든 교과서는 대체적으로 교과서 집필 안을 준수하고 있었다. 교과서의 내용 면에서는 집필 안에서 제시하고 있는 단원이 균형 있게 배분이 잘 되어 있는 교과서가 있는 반면에, 단원의 비중이 너무 편중되어 있는 교과서가 있기도 하였다. 또한 보충적 자료, 평가적 자료, 시각적 자료 등에 대한 배분에 있어서도 교과서에 따라 상당한 차이를 보이고 있었다. 교과서와 관련하여 대학수학능력시험 출제 경향은 각 교과서가 비슷한 정도의 연계성을 가지고 있으나 수험생의 입장에서는 한 가지의 교과서만으로는 대학수학능력시험을 대비하여 공부하는데 충분하지 않으므로 교사는 모든 종류의 교과서를 이해하고 학생들에게 가르치는 교과서 외의 다른 교과서 내용도 추가적으로 가르칠 필요가 있는 것으로 나타났다.

• 한국의류학회지
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• 제14권3호
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• pp.183-195
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• 1990

The author has studied the effect of clothes design to mask the dorsal curvature that is one of the commonest changes in elderly women. Body measurements including the body type and the status of dorsal curvature were perfor-med on 153 women of over 60 years of age, and then a body form to fit to the mean measure-ments was made to evaluate the effects of various designs to it. With 31 pattern designs modified by changing in their slash lines and gathers using darts, the diminishing effect of the rounded back were evaluated by means of sensory test. The results of this study can be summarized as follows: I . Results from the body measurements 1) The mean body type in elderly women was that of obesity. 2) With the advancement of age, the angle to indicate the degree of dorsal curvature as well as the angle to indicate the posture are increased. II . Concerning to the clothes design to diminish the shape of dorsal curvature 1) Among the designs by the position of darts, the basic pattern (Fig. 5-1-(1)) showed the best effect to mask the shape of dorsal curvature. 2) Out of the applied designs of princess lines, that in which the slash line is pointing toward the shoulder point (Fig. 5-2-(1)) seemed to be most effective. 3) What has angled princess line (Fig. 5-3-(1)) had the most diminishing effect among the waist darts and armhole princess lines. 4) Among the V-shaped designs, the slashed at the shoulder point (Fig. 5-4-(1)) had the best effect to lessen the shape of the dorsal cuuature. 5) Wider angle yoke had better effect to the narrow angle one among the designs with straight yoke, and that with downward direction (Fig. 5-5-(1)) showed the best effect. 6) Between straight wide angle yoke and curved yoke, that of curved one with downward direction (Fig. 5-6-(1)) had better effect as far as the masking effect of dorsal curvature is concerned. 7) Gathers around the neck showed better effect to those around the shoulder, and the more amount of gathers (Fig. 5-7-(1)), there was better effect. 8) The design with midline gathers at the level of horizontal slash line of armhole (Fig. 5-8-(1)) showed better effect to that with seperated gathers. 9) In case of design with gathers at the horizontal line of armhole, it showed the better effect with less amount of gathers in midline ones, but with more amount in the side ones. 10) Considering all 7 different designs with better effect in covering the shape of dorsal curvature, it was evident that the design with gathers was far better than the design with application of slash lines.

• 한국지반신소재학회논문집
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• 제13권3호
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• pp.1-10
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• 2014

하천제방 누수측정 방법은 전기비저항탐사 및 GPR탐사 등이 사용되고 있으며, 하천설계기준에 의하면 제방의 누수 시 시추를 통한 제체재료의 투수계수를 측정하는 방법을 사용하고 있지만 전자의 경우 정확한 누수위치와 제체의 포화정도를 알 수 없으며, 후자의 경우 누수가 발생한 뒤 시추를 통한 조사방법으로 사전에 예측할 수 없다는 단점이 있다. 한편, 이동식 TDR센서는 2000년 이후 개발된 첨단화된 TDR기법으로서 관측공을 따라 측정센서를 연속적으로 유전상수를 측정함으로써, 기존 TDR기법과 달리 제방 깊이별 유전상수를 측정할 수 있는 효율적인 기법이다. 본 논문에서는 이동식 TDR(Time Domain Reflectometry)센서를 이용하여 제방누수 모니터링시스템의 성능을 평가하고자, 하상재료(모래) 및 제체재료(화강풍화토)의 다양한 비교실험을 수행하였다. 그 결과, 이동식 TDR시스템은 건조단위중량에 비해 함수비가 3배 이상 민감하게 반응하며, 이동식 TDR 센서를 사용하여 측정된 유전상수값은 지반의 함수비, 밀도와 일정한 상관관계를 나타내고 있음을 확인하였으며, 제방 누수탐사에 관한 기초자료로서 활용 할 수 있을 것으로 판단된다.

• 패션비즈니스
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• 제2권4호
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• pp.93-101
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• 1998

Knit products which had been limited only to underwear, recently became popularized, fashionized and highly classified covering even outer garments such as sportswear like golfwear, woman's dress, and man' s suit. As fashion cycle is getting shorter and the more a nation advanced prefers knit to woven fabrics knit industry has a very bright prospect, particularly woman's knit which is sensitive to fashion can be said as a fashion product with high value added. This study is to grasp the physical properties of stitch which are fundamental to the development of knit products. For this purpose, 2/20s of 100% wool were woven by the author of this study to basic plain stitch, rib stitch, varied transfer stitch, and float stitch on a SEMASEIKI cross knitter 7G to test the physical properties, and the result was as follows; 1. As for the relation between knit stitch and rate of extension recovery, rate of extension recovery was higher in the course direction than in the wale direction of three stitches except transfer stitch; rib stitch showed the highest rate of extension recovery in the course direction while float stitch showed the highest rate of extension recovery in the wale direction. 2. As for the relation between knit stitch and bursting strength elastic rib stitch showed higher bursting strength to indicate elasticity is an important factor of bursting strength and float stitch showed higher bursting strength too to indicate that the floating yarn on the surface plays a role of support. 3. As for the relation between knit stitch and air permeability perforated transfer stitch showed the lowest air permeability to prove that the size of perforation affects on the air permeability a great deal. 4. As for the relation between knit stitch and warmth retaining rib stitch through two lined needle bar showed the highest degree. The reason the warmth of perforated transfer stitch didn't decrease much was because the perforation wasn't big enough and content of air increased from the unevenness of the perforated parts through stitch variation. Based upon this result, each stitch can be characteristically summarized as follows; plain stitch showed a stable condition of knit cloth in four kinds of physical property test. And rib stitch is proper to tighten the edge of sleeve or clothe making use of its excellent extension recovery and to make socks for the highest bursting strength and warmth retaining. In the case of transfer stitch, seasonable designs can be taken by controlling the size of loop. Considering the pleasantness, underwear should be made of stitches with good air permeability float stitch was revealed to have color and pattern effects and a great bursting strength. This study has limitations in the aspect that it dealed with a small part of various knit stitches and the items of physical property test were not enough. The author of this study hopes that further studies would make deeper understandings about knit stitch based on more varied stitches and physical property tests ultimately to contribute to the development of fashionable designs proper to maximize the usage, function and originality.

• 한국환경생태학회지
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• 제21권2호
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• pp.134-140
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• 2007

본 연구는 자연성 정도를 달리한 산악조망경관에 있어 각 공간별 형태적 특성이 지니고 있는 이미지 및 시각 선호도를 구명하여 차후 공원관리 및 설계시 기초자료를 제공하기 위해 한라산 성판악 등산로 상에서 촬영한 사진자료를 평가매체로 하여 자연도에 따른 이미지와 선호도를 조사분석 하였으며 그 결과는 다음과 같다. 선호도 평가치는 자연성 정도 및 포장의 재료특성 등의 영향으로 정상부로 향할수록 크게 상승한 것으로 나타났다. 등산로 변 이미지 평가는 아름답고 매력 있으며, 깨끗한 이미지가 주류를 이루고 있었다. 인자분석 결과 4개의 인자군은 각각 ${\ulcorner}$경관매력도인자${\lrcorner}$, ${\ulcorner}$공간스케일인자${\lrcorner}$, ${\ulcorner}$자연성인자${\lrcorner}$, ${\ulcorner}$지형지세 인자${\lrcorner}$라고 명명 분류되었으며 전체 변량중 이들 인자군의 설명력은 57.6%이었다. 자연도와 명명 인자별 관계에서 각 공간별 인자점수의 평균치 변화 결과 자연도가 증가하면 할수록 경관매력도차원의 인자점수 값이 낮아지는 경향을 보여 미적 인 감각과 시설물의 수에 상관성이 있을 것이란 판단이 가능할 수 있을 것으로 생각된다. 또한 시각선호도 모형 분석 결과 경관매력도차원의 인자가 시각 선호도에 가장 큰 영향을 미친 것으로 나타났다.

• 한국산림과학회지
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• 제85권2호
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• pp.195-209
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• 1996

본 연구는 우리 나라 대표적인 산악형 국립공원이라 할 수 있는 덕유산 국립공원의 개발지역을 대상으로 하여 개발전과 개발후로 나누어 S.D Scale 측정에 의한 공간의 이미지 구조를 인자분석, 알고리즘을 통하여 밝히며, 시각적 선호요인 분석을 실시하여 공간의 선호도 결정요인 추출과 각 요인 상호간의 상대적 중요성을 설명한다. 이 결과를 요약하면 다음과 같다. 덕유산 국립공원의 공간 이미지를 함축하는 변인(變因)은 종합평가차원, 공간적차원, 친근감차원, 자연성차원, 호감성차원, 물리적차원 등 6개의 인자군(因子群)으로 분석되었다. 이러한 변인들은 덕유산 국립공원의 공간 이미지를 나타내고 있으며, 인자수 제어방법에 의하여 전체변량은 45.46%와 45.45%로 나타났다. 국립공원 개발에 따른 경관관리를 위한 계량적 접근의 기능적차원에 반영되어야 할 주요 척도적 요소라고 생각된다. 각 지점별 공간 이미지의 차이에 따라 시각적 선호도를 결정짓는 변수가 달라지며 동일지점에서도 공간이미지의 주된 변수적 기능을 수행하는 변인의 차이에 의하여 선호도 결정 요인의 차이가 인정된다 할 수 있다.