• 한국수산과학회지
• /
• 제54권6호
• /
• pp.1052-1057
• /
• 2021

The diet composition of common flying squid Todarodes pacificus was studied using 1,084 specimens collected through trawl and jigging from June 2018 to June 2020 in the East Sea of Korea. The mantle length (ML) of the collected individuals ranged from 13.6 to 31.1 cm. Todarodes pacificus is a carnivore. In the study area, T. pacificus was observed feeding mainly on fish and cephalopods, in addition to small quantities of crustaceans. The calculated trophic level value for T. pacificus was 4.10. Small individuals (ML, <18.0 cm) mainly fed on cephalopods, while intermediate (ML, 18.0-23.0 cm) and large (ML, ≥23.0 cm) individuals fed mainly on fish and occasionally on cephalopods. Overall, as the body size of T. pacificus increased, the mean weight of the consumed prey increased (one-way ANOVA, P<0.05).

• 복식문화연구
• /
• 제14권5호
• /
• pp.699-714
• /
• 2006

The purpose of this study is to suggest a methodology to grasp the design method of industrial slacks pattern for women in their early twenties. The result of this study is as follows: 1. The result of the questionnaire showed that the design of rear center gradient was most important and the rear center gradient was designed by shifting waist line and hip line to a suitable degree.; below the waist by 4cm, the girth was measured and the ease of $0{\sim}1cm$ was applied to it, and the ease of hip girth was $3.2{\pm}1.2cm$, and rear center gradient was $2.2{\pm}1cm$, and front crotch extension was $2.8{\pm}0.5cm$, while rear crotch extension was $6.3{\pm}0.5cm$. 2. By comparing rear center gradient which was selected as an important design item with total crotch length and hip girth, I selected industrial pattern and educational pattern, and evaluated them on human bodies. In the result of ANOVA analysis, there were meaningful differences in 8 items: the ease of front waist girth, the ease of front abdomen, the ease of front hip girth, rumples in the side lines, the location of rear waist line, etc. 3. The design method of slacks pattern suitable for women in their early twenties was suggested as follows: the location of waist girth is below waist by $2.5{\sim}3cm$; the ease of waist girth is $0{\sim}1cm$; the ease of hip girth is $2{\sim}3cm$; total crotch length is body size - 5cm; rear center gradient is $2.5{\pm}0.5cm$; rear crotch extension is $7{\pm}0.5cm$; front crotch extension is 3cm.

• 한국건축시공학회지
• /
• 제11권2호
• /
• pp.108-115
• /
• 2011

본 연구는 건설사업관리 시장의 공정한 경쟁을 위하여 국내 CM 시장현황, 2010년 CM 공시업체현황 및 평가기준 분석을 통하여 CM 선정방식을 고찰하였다. 또한 건설사업관리의 평가기준의 적정성을 고찰하기 위하여 2009년도 CM 상위업체 현황과 2002년부터 2010년까지 120개 CM 용역의 참가자수와 평균 투찰율을 분석하고, 2010년 평가 결과를 공개한 6개 CM용역을 분석하였다. 이러한 고찰결과 현행 CM용역의 평가기준이 용역금액으로 결정되고 기술제안서 평가에 따른 기술력과 가격이 연계되지 못하는 등 CM 산업의 발전과 CM회사의 기술발전을 저해하는 결과들이 도출되었으므로 사업특성과 기술력 요구조건에 따른 CM자 선정방식의 개선을 제시하였다. 따라서 향후에는 사업특성별로 기술력 요구조건을 구분하는 방식과 CM 사후평가를 위한 추가의 연구 노력이 필요할 것으로 판단한다.

• 한국수산과학회지
• /
• 제29권1호
• /
• pp.92-96
• /
• 1996

CM-chitin의 고유특성 및 유동특성을 밝혀 효과적으로 식품산업에 이용하기 위하여 CM-chitin 수용액의 유동특성 중 임계농도와 유동방정식을 조사하였다. 물에서 CM-chitin의 환원농도는 2.5이었으며, 이 때의 임계농도는 $0.8\%(w/v)$이었다. 즉 $0.8\%$ 이하의 농도에서는 분자사슬간 상호작용이 일어나지 않았으며, $0.8\%$ 이상에서 상호작용이 일어나는 것으로 나타났다. $0.5\%$ CM-chitin 용액은 전단속도가 증가하여도 점도는 일정하게 유지되는 뉴우튼 유체의 특성을 보였으며, $1.0\%$ 용액은 전단속도가 증가하면 점도가 낮아지는 의가소성 유체의 특성을 보였다. $3.0\%$ CM-chitin 수용액의 유동상수 $\eta_\infty,\;\eta_0,\;\beta$, n은 각각 $0.0908(\fallingdotseq0.1)cp$, 770cp, 0.81, 0.36이었다. 따라서 $3.0\%$ CM-chitin 수용액의 유동방정식은 $\eta=0.1+\{{770/(1+0.81D^{0.36})\}$으로 나타낼 수 있다.

• 콘크리트학회지
• /
• 제13권5호
• /
• pp.117-120
• /
• 2001

• 기술사
• /
• 제36권2호
• /
• pp.50-55
• /
• 2003

• 과학과기술
• /
• 제15권1호통권152호
• /
• pp.42-45
• /
• 1982

• 한국산업보건학회지
• /
• 제15권1호
• /
• pp.1-7
• /
• 2005

Although the Fourier Transform Infra-Red spectrophotometric Direct on Filter(FTIR-DOF) method is a useful analytical technique for quantifying quartz content in respirable dust samples, a number of analytical problems must be taken into consideration such as, to name only a few, inhomogeneous deposition of particles, level of environmental humidity, uneven surface of the filter, and interfering minerals in the sample. This study was designed to select the most suitable wavelength and proper filter material for the method, and to investigate effects of humidity and inhomogeneous deposition of particles on the filter. Samples of respirable dust, created in a dust chamber containing standard material of quartz, were collected using a cyclone equipped with a 25mm filter as a collection medium. The results were as follows; 1. Among seven (7) commercially available filters tested for the FTIR-DOF method, the DM 800 filter showed the best analytical performance having the lowest background absorbance bands and no overlapping peaks at 799, 779, and $695cm^{-1}$. 2. The variations of absorbance due to humidity ranged from 1.0% to 3.3% for $799cm^{-1}$, 1.0% to 3.3% for $779cm^{-1}$, and 8.9%~20.9% for $695cm^{-1}$ peaks, respectively. The $699cm^{-1}$ peak was proved to be most vulnerble to environmental humidity for quantitative analysis of quartz. 3. As for effects of inhomogeneous deposition of samples, the highest variation of absorbance of 10.9% ($13.5{\mu}g$) was observed when using the 695cm-1. The variations of absorbance from the other two peaks, 799 and $779cm^{-1}$, ranged from 1.2 to 3.2%, and 1.4 to 4.1%, respectively. Therefore, the $799cm^{-1}$ peak was considered to be most reliable for quantitative analysis of quartz. The results of this study suggest that, for quantitative analysis of quartz in the respirable dust samples, use of the $799cm^{-1}$ peak can minimize the influence of environmental humidity and inhomogeneous deposition of particles on the filter. The FTIR-DOF method, if adopted for routine analysis of quartz in the respirable dust samples, could save sample preparation time and efforts substantially and also could increase analytical throughputs. Since use of the $799cm^{-1}$ peak is prone to be affected by interferences in the sample, further research on minimizing the effects is needed.

• 한국화재소방학회논문지
• /
• 제5권3호
• /
• pp.5-14
• /
• 1991

본 논문에서는 산업안전 공학의 중요부분의 하나인 산업안전모와 화재진압시 소방관들이 쓰는 방수모의 안전도가 어느 정도인가를 각종 실험장치를 50cm. 100cm, 120cm, 높이의 변화를 주어 가면서 같은 중량으로 낙하시켜 물체에 의한 낙하시 충격에 견디는 힘의 상태. 주파수 분석기에 의한 강도 및 bend의 응답신호 등을 연구하였다. 그 결과 안전모와 스프링상수와 관계, 두뇌부분과 지면사이에서의 충격흡수력. 탄성력 등이 어느 정도인가를 수식 및 실험을 통해 알아봤을 때 산업현장에서 사용하는 안전모보다는 방수모의 탄성력과 강도력이 컸으며 또한 충격흡수력도 양호하다는 것을 알 수 있었다. 그러나 Goldsmith, W.의 “Response of a realistic human head-neck model to impact” Vol.100. 1978. pp.25-52의 실험연구결과 기준치를 보면 인간두뇌에 충격물체로 부터 전달되는 충격파의 흡수력은 뇌파의 신경을 파손시키지 않으려면 최소한도의 주파수범위가 400Hz, 증폭화 0.00310 이하 이여야 된다고 역설하였다. 그러나 우리나라의 방수모 강도의 안전성 및 bend의 충격흡수력은 410-810Hz의 주파수치가 나타났다. 고층에서 일정중량의 물체로 충격을 받았을 때 어느 정도로 흡수력을 방수모 bend에서 받아들어야만 두뇌신경에 충격적인 영향을 끼치지 않나 하는 우리 실정에 맞는 기준치가 설정되어야만 할 것으로 안다. Goldsmith ,W. 박사의 연구결과에 의한다면 국내에서 생산되는 산업안전모보다는 강도 및 충격흡수력이 양호하나 국제수준에는 못미치고 있었다. 이제 우리 방수모도 강도뿐만 아니라 방수모 내부의 bend 즉, 방수모와 두부 사이에 충격흡수력 장치를 좀더 과학적인 실험방법으로 개선되어 화재 진압시 물체낙하로 인한 두부보호에 좀더 노력을 기울일 필요가 있어야 될 것이다. 한편 방열복을 입은 상태에서 불길에 뛰어 들었을시 내부의 온도변화, 인체에 미치는 영향 등은 실험장치 불족으로 많은 문제점이 발생, 보다 심층의 연구가 필요할 것을 인식하였으나 뒤로 미룬채 마무리 지었다.

• 한국의류산업학회지
• /
• 제9권6호
• /
• pp.581-588
• /
• 2007

The purposes of this study are to look into the formative characteristics of the miniskirt and to evaluate the visual effects and images according to changes in the silhouette and length of the miniskirt from analyzing the mini skirt style shown in 2007 S/S domestic fashion. The miniskirt style shown in 2007 S/S domestic fashion was analyzed with pictures from a fashion website "Interfashion Planning" from Feb. to May of 2007. As a result, the basic lines of the miniskirt are classified into two types according to the side line. The lengths of miniskirts are classified into five steps of 25 cm, 27.5 cm, 30 cm, 32.5 cm, and 35 cm from the natural waistline. The stimuli were produced with imaginative sewing system 3D CAD of i-design series. For the visual evaluation according to changes in the silhouettes and length of the miniskirt, we used 13 pairs of items to find the visual effects, and 23 pairs of adjectives to measure the visual images. The stimuli and adjectives were randomly given to the evaluators and were evaluated by the 7-point likert type scale. Data we got from this experiment was analyzed statistically by using the SPSS 12.0 and practiced the Factor Analysis and Correlation Analysis. Formative characteristics of miniskirts can be found in the lines, colors, and materials that are the elements of fashion designs, colors and materials are the characteristics of the cloth that is the medium of the expression of designs. The result of factor analysis of visual effects and visual images according to changes in the silhouettes and lengths of miniskirts, the visual effect was composed of the three factors of the length of the lower body, the thickness of the lower body, and the shape abdomen and it was showed that these three factors occupied 63.6% of the total variance. The visual image was composed of four factors of elegance, personality, attraction, maturity and these four factors got 67.6% of the total variance.