• 생물환경조절학회지
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• 제2권2호
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• pp.89-98
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• 1993

본 연구에서는 일반농가에서 시설내 환경이 불량한 아치형 파이프하우스를 간이시설로 이용하고 있어 시설내 환경이 개선된 간이시설을 개발하여 작물생장반응을 구명코자 톱날형과 개량아치형, 관행아치형의 시설형태와 노지로 구분, 시험을 실시하여 연구결과를 요약하면 다음과 같다. 1. 개량아치형은 관행아치형에 비해 최고 4$^{\circ}C$의 온도가 낮아졌고, 톱날형은 1$^{\circ}C$이상 낮아 시설내 환경이 개선되었다. 2. 지하부 환경에서 관행아치형에 비해 잠열냉각+배수개선 처리는 1.3$^{\circ}C$가 낮고, 배수개선 처리는 0.9$^{\circ}C$가 낮게 나타나 잠열효과를 1$^{\circ}C$이상 보았다. 3. 톱날형은 하우스파이프를 지주겸용으로 설치하여 성력화면에서 가장 우수하였으며 환기를 위한 인력이 필요치 않아 노동력을 절감할 수 있는 시설로 개발되어졌고, 개량아치형은 환기를 위한 노동력은 필요하였으나 하우스파이프를 지주겸용으로 설치하였으므로 관행아치형에 비해 성력화되었다. 4. 토마토 상품과율은 개량아치형이 4,897kg/10a로 가장 많았고 관행아치형이 그 다음 순이었으며 광합성과 직접적인 관계가 되는 엽면적은 톱날형이 다른 형태보다 가장 넓었다. 5. 수량 및 상품성을 높이기 위해서는 환기면적이 넓은 개량아치형이 간이시설로써 적당하였고, 지하부 환경개선 효과는 톱날형의 잠열냉각+배수개선 방법이 좋았으며, 개량아치형과 관행아치형은 배수개선이 효과적이었다. 6. 톱날형, 개량아치형 간이시설은 성력화되고 시설내 환경이 개선되어졌으며, 관행아치형 시설형태를 좀더 발전시켜야 할 것으로 사료된다.

• 한국의류학회지
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• 제28권8호
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• pp.1175-1185
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• 2004

This study evaluated thermo-physiological and subjective properties of improved disposable coveralls for railroad carriage maintenance through climatic chamber trials and a filed study. Subjects wore five kinds of disposable coveralls (Type A: a disposable coverall on the market, Type B: a coverall with an improved hood and size-adjustable design, Type C: a coverall with a portable hood, Type D: a coverall with small holes for ventilation, Type E: a sleeveless coverall, Type F: a separated type of coverall with half sleeves) The air temperature in the climatic chamber was set in 9$^{\circ}C$ and 30$^{\circ}C$ For each condition, subjects simulated the railroad work for 120min. and rectal temperature, skin temperatures, clothing microclimate and subjective sensations were measured. The results of chamber trials showed rectal temperature and clothing microclimate did not display significant differences by clothing type. In 30$^{\circ}C$ air temperature, mean skin temperature was higher in Type E and Type F than in Type A(p＜0.05) but between the improved coveralls(B-F), we could not find any significant difference. In the case of thermal comfort, the most preferred types were Type B and Type C in 9$^{\circ}C$ and Type F in 30$^{\circ}C$. All subjects felt more comfortable in the improved coveralls than in coveralls of the market (Type A). In field study, workers preferred Type B, Type C and Type F to Type A but the most favorite type differed by the specific type of work. Especially, workers were dissatisfied that Type D tore easily due to lots of small holes around the armpits and Type I did not protect workers＇ shoulder and arms from oil contamination. According to the climatic chamber trials and field study, the most effective coveralls were Type B and Type C for winter and Type F for summer.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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• pp.315-318
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• 1988

PHOTO-RESIST 자체문제로인해 감소되는 최소해상력, 촛집심도여유 및 CRITICAL DIMENSION (C.D.) 조정여유도등을 연구하였다. 기존에 사용중인 PHOTO-RESIST(큰 분자량)와 PHOTO-RESIST자체내에 CONTRAST 촉진 물질(CEM)이 첨가된것(INNER CEM TYPE) 및 PHOTO-RESIST구성성분중 작은 분자량/좁은 분자량 산포가 형성된 RESIN 의 PHOTO-RESIST(LOW MOLECULAR WEIGHT CONTROL TYPE)등 세가지 PHOTO-RESIST를 사용 하여 상기의 항목을 분석하였다. INNER CEM TYPE 및 LOW MOLECULAR WEIGHT CONTROL TYPE의 PHOTO-RESIST는 기존에 사용중인 RESIST보다, 최소 RESOLUTION은 약 0.2 - 0.3 um, DEPOCUS MARGIN은 약 0.8 - 1.2 um 및 C.D. CONTROL LATITUDE 향상된 것 등이 우수하였다.

• 한국의류산업학회지
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• 제6권4호
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• pp.511-514
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• 2004

We studied on the bleaching properties of silk fabric by vapor type ozone processing using ozone's strong oxidation instead of 28% $H_2O_2$ chemical treatment. When vapor type ozone processing was directly treated to fabrics retaining water to 50~70% pick up ratio, high concentration ozone was generated 14,000ppm(168 mg/h) approximately and finally its bleaching improved. The fabric's bleaching effect was improved because vapor type ozone generated the highest decomposition to oxidation of surface and inter molecules. The experiment revealed that fabric's bleaching was improved by change of the pick-up ratio of vapor type ozone processing. However, tensile strength and elongation were reduced by increase of time, and the time that was assumed as the most optimized time to minimize the reduction of fabric's tensile strength and elongation as well as maximizing the fabric's bleaching was 30 minutes.

• 한국의류산업학회지
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• 제3권4호
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• pp.362-366
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• 2001

We studied on the softness properties of polyester fabric by vapor type ozone processing using ozone's strong oxidation instead of 25% NaOH chemical treatment. When vapor type ozone processing was directly treated to fabrics retaining water to 40% pick up ratio, high concentration ozone was generated oxidation of 3~4% approximately in polyester fabrics and finally its softness improved. The fabric's softness effect was improved because vapor type ozone generated the highest decomposition to oxidation of surface and inter molecules. The experiment revealed that fabric's softness was improved by change of the time of vapor type ozone processing. However, tensile strength and elongation were reduced by increase in time, 60 minute was assumed as the most optimized time to minimize the reduction of fabric's tensile strength and elongation as well as maximizing the fabric's softness.

• 소음진동
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• 제6권2호
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• pp.245-251
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• 1996

This study is to suggest the improved noise barrier which is harmonized with surrounding landscape and maintained the similar reduction of reflected sound and diffraction effects in comparison with the aluminum noise barrier of absorbing type which is formed a great majority in Korea. In this study the two improved models of noise barrier(Diffuse and Disperse type) were designed and compared with the noise barriers of absorbing type in the acoustics performance (the reduction of reflected sound and diffraction effects) through the field and full-scale experimental measurement. As these two models have the same acoustic performance as the noise barrier of aluminum absorbing type, it is suggested that these models can be applied to the improved noise barrier as an alteration of aluminum absorbing type barrier.

• 전자공학회논문지CI
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• 제44권5호
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• pp.20-27
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• 2007

본 논문에서는 RFID 시스템에 사용되는 무선 접속 프로토콜 중 UHF 대역 프로토콜인 ISO 18000-6의 Type A와 B 의 에어인터페이스를 분석하고, 프로토콜에서 규정된 충돌방지 알고리즘을 구현하였다. 또한 표준 프로토콜의 성능을 개선한 ISO 18000-6의 Type A와 B 충돌방지 알고리즘을 제안하고, 그 성능을 비교하였다. 개선된 알고리즘과 표준 알고리즘의 성능을 시뮬레이션을 통하여 비교한 결과, 개선된 ISO 18000-6 Type A 알고리즘의 총 인식시간 감소율은 태그 수가 100개 일 때 35.2%, 태그 수 1000개 일 때 24.3 % 감소하였다. 그리고 개선된 ISO 18000-6 Type B 알고리즘의 총 인식시간 감소율은 태그 수 100개 일 때 6.0 %, 태그 수 1000개 일 때 6.6 % 감소하였다. 따라서 본 논문에서 제안한 개선된 충돌방지 알고리즘은 RFID 시스템의 태그 인식성능을 개선하는 방안으로 적용될 수 있다.

• Archives of Plastic Surgery
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• 제37권4호
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• pp.433-442
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• 2010

Purpose: Many authors reported about the posttraumatic nasal aesthetic complications. However, the studies for functional or intranasal complications are not enough yet. We identified relatively high prevalence of nasal obstruction and olfactory dysfunction in nasal synechiae, and the synechiae formation was a frequently occurred after the nasal bone reduction. And then, the aim of this study is to identify the usefulness of the treatment of intranasal synechiae. Methods: We reviewed the data from 10 patients with symptomatic intranasal synechiae from June 2007 to June 2009. We enforced evaluation with preoperative CT in all patients but postoperative CT within complicated patients. We studied 10 patients with intranasal synechiae who had persistence postoperative symptoms. We studied the patients who were operated by removal of synechiae and ancillary surgical treatments in the last two years. Results: In the previous report, the incidence of intranasal synechiae was 15% (n=62) and symptomatic synechiae was 16% (10/62). We classified the nasal bone fracture according to Stranc classification. In this paper, the incidence of treated intranasal synechiae was 13% (2/15) in Frontal Impact (FI) Type I, 11% (2/18) in FI Type II, 100% (2/2) in FI Type III, 0% (0/2) in Lateral Impact (LI) Type I, 25% (3/12) in LI Type II, and 33% (1/3) in LI Type III, respectively. After removal of synechiae, all patients improved nasal obstruction and little improved olfactory disturbance. Conclusion: Simple removal of synechiae by scissors improved postoperative symptoms and complications such as nasal obstruction and olfactory dysfunction. After removal of synechiae, all patients improved nasal obstruction, however, little improved anosmia. So, we thought that olfactory dysfunction may result in many intranasal factors. First of all, education of delicate procedure regarding this subject should be empathized accordingly.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 춘계 학술논문 발표대회
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• pp.295-297
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• 2013

Reinforcing bar coupling method has a variety of ways including lap-splice method. However, there are problems that need to be improved in terms of constructability, economics analysis. We should be improved about the problems of the existing methods. Accordingly, this study were developed a new type of staggered grip type reinforcing bar coupling. The proposed method show the following effects than existing methods. First, this method can be reduce time through improved workability. Second, increasing safety through the slip removal. Third, improving economic efficiency by reduce the manufacturing costs.

• 반도체디스플레이기술학회지
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• 제16권2호
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• pp.75-78
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• 2017

We reports improved monitoring performance of Self plasma-optical emission spectroscopy (SP-OES) by augmenting a by-pass tube to a conventional straight (or single) tube type self plasma reactor. SP-OES has been used as a tool for the monitoring of plasma chemistry indirectly in plasma process system. The benefits of SP-OES are low cost and easy installation, but some semiconductor industries who adopted commercialized SP-OES product experiencing less sensitivity and slow sensor response. OH out-gas chemistry monitoring was performed to have a direct comparison of a conventional single type tube and a by-pass type tube, and fluid dynamic simulation on the improved hardware design was also followed. It is observed faster pumping out of OH from the chamber in the by-pass type SP-OES.