• 한국화재소방학회논문지
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• 제33권6호
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• pp.165-172
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• 2019

본 연구는 소방대원들이 화재현장에서 진압 및 구조 업무 활동 시 필수로 착용하고 있는 SCBA 시스템에 팀원 간 의사소통이 가능하도록 다자간 동시 양방향 통신이 적용된 SCBA 면체용 무선통신 모듈을 설계·제작하여 그 성능을 확인하였다. 본 시험 조건에서 팀 통신모듈 성능평가결과 가시거리(LOS)에서 500 m 이상 통신이 가능하며, 건축물 내부 수평 통신거리는 1:1로 최소 36 m에서 최대 51 m까지 측정되었다. 또한, Ad-hoc 기능을 구현하여, 3 hoc 자동중계로 통신거리가 128 m 까지 확대되었다. 건축물 내부 수직 통신거리는 오픈된 계단실의 경우 5층까지, 구획된 계단실의 경우 3층까지 통신되었고, 2 hoc 자동중계를 통해 5층까지 모든 통신이 가능하였다. 화재상황을 가정한 통신 성능실험결과 별도의 PTT 키 조작 없이도 소방무선통신 표준약어를 5명의 팀원이 정확히 인지하는 것을 확인할 수 있었다. 추가적으로 불꽃저항성 실험결과 950 ± 50 ℃의 불꽃에 5 s간 노출 후 즉시 소화되어 내염성을 지닌 것을 확인할 수 있었다.

• 한국융합학회논문지
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• 제11권4호
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• pp.71-78
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• 2020

본 연구에서는 마네킹을 이용해서 평상시 응급처치시 입는 옷, 레벨 B, 레벨 C PPE를 착용이 고품질의 심폐소생술에 미치는 영향을 알아보고자 한다. 본 실험에 참여한 응급구조사는 C 지역 소방 소속의 5년 이상의 경력을 가진 119 구급대원 20명을 대상으로 하였다. 심폐소생술 중 가슴압박이 중지되는 손이탈 시간 및 비율의 경우 유니폼 착용그룹에서 11.9 초, 레벨 C PPE 착용 그룹에서 11.4 초, SCBA 착용 그룹에서 13.1 초인 것으로 밝혀졌다. 개인보호장비 착용은 구급대원의 움직임을 방해하고 있고 보상동작을 사용하게 되어 효율적인 응급처치의 어려움이 나타날 가능성이 많아지며, 이러한 상황이 지속될 경우 구급대원의 신체에도 피로감과 손상을 줄 수 있다. 구조 및 구급대원들은 응급상황을 대비해서 레벨별 개인보호장비를 착용하고 구조 및 심폐소생술 훈련에 임하여야 한다.

• 한국환경보건학회지
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• 제42권6호
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• pp.430-437
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• 2016

Objectives: The new Chemical Control Act from the Korean Ministry of Environment (2014-259) simply states only in basic phrases that every worker handling the listed chemicals should wear personal protective equipment (PPE) and does not consider the different hazard characteristics of particular chemicals or work types. The purpose of this study was to produce an exposure risk matrix and assign PPE to the categories of this matrix, which would be useful for revising the act to suggest PPE to suit work types or situations. Methods: An exposure risk matrix was made using hazard ranks of chemicals and workplace exposure risks in the previous study. For the 20 categories of exposure risk matrix PPE, levels A, B, C, D as classified by OSHA/EPA were assigned. After 69 hazardous chemicals were divided into 11 groups according to their physiochemical characteristics, respirators, chemical protective clothing (CPC), gloves and footwear were suggested on the basis of the assigned PPE levels. Results: PPE table sheets for the 11 groups were made on the basis of work types or situations. Full facepiece or half-mask for level C was recommended in accordance with the exposure risk matrix. Level A was, in particular, recommended for loading or unloading work. Level A PPE should be worn in an emergency involving hydrogen fluoride because of the number of recent related accidents in Korea. Conclusion: PPE assignment according to the exposure risk matrix made by chemical hazards and work type or situation was suggested for the first time. Each type of PPE was recommended for the grouped chemicals. The research will be usefully used for the revision of the Chemical Control Act in Korea.

• 구강회복응용과학지
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• 제26권4호
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• pp.477-482
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• 2010

다수 구치부 상실을 가진 환자의 경우 상실 공간으로 대합치의 정출 및 잔존 전치부 저작으로 인한 교합 외상이 발생한다. 대합치의 정출로 인해 교합 평면이 붕괴되고 구치부 지지 상실로 잔존 치아의 심한 마모를 보이게 된다. 이 경우 보철 수복 공간을 확보하고 교합 평면을 바로잡기 위해서 최소한의 수직 고경을 높여 잔존 치아와 상실된 치아 부위의 수복치료가 필요하게 된다. 본 증례의 환자는 다수 구치 상실로 인한 저작 곤란 및 마모된 전치로 인한 심미적 문제로 내원한 환자이다. 보철 수복을 위한 치아 삭제 전 가역적인 거상 장치를 2개월간 사용한 뒤, 비가역적인 치아 삭제 후 임시 수복물을 3개월간 사용하여 총 5개월간 최종 수복물에 대한 적응 여부를 관찰하였다. 수직 고경 거상량은 3mm로 비교적 작은 양이었고 저작계가 증가된 수직 고경에 대해 특별한 병적 변화 없이 적응하였다. 최종 수복물은 중심 교합시 전체 치아가 균등하게 접촉하고 측방운동시 견치에 의해 즉각적으로 이개되도록 하였으며 금속 교합면를 부여하여 장기적으로 과도한 근육 활성 및 교합 외상, 도재의 파절을 방지하고자 하였다. 이상의 치료를 통해 교합 붕괴 환자를 안정적인 보철 수복물로 재건한 치험예를 보고하고자 한다.

• 복식문화연구
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• 제11권2호
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• pp.275-292
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• 2003

The purpose of this study is to recognize the aesthetic characteristics of the Maximalism depicted in contemporary costumes of new millennium. This is done by analyzing and examining the social and cultural background of fashion in the few years of 21st century. The fashion trend of the beginning of 21st century was coexisted conflicting factors with ultramodern factor and past recurrent factor. For that reason, new millennium is to be existence background of Maximalism style in contemporary costumes. The social and cultural background of Maximalism was regarded as characteristics of the Glocalism, fusion style, bobos. Glocalism means a compound word of Globalism and Localism, and used various fields of policy, economics, society etc. Consequently, the aesthetic formativeness of Maximalism of the contemporary costumes was investigated as the 'Romantic Hippie Look' and 'Romantic Sports Look' 1) Romantic Hippie Look New millennium fashion trend is affected by hippie style of 1970's. That is major reason that the antiwar consciousness of 9.11 terror, USA-Afganistan war and the economic depression is similar to 1970's situation. Accordingly, fashion trend is developed into bright, light, romantic style and fashion designers chose materials with flowers, butterflies, dragonflies pattern. Because the clothing of these material reflects well modern people's feeling to escape misgivings, unrest of political terror, war etc. The characteristics of hippie style expressed freedom as the greatest merit was raised new trend, so called 'Romantic Hippie Look' on new millennium. That is, the romantic hippie look of the contemporary costumes is depicted as the formative beauty of the multiculturalism and nationalism. 2) Romantic Sports Look : The beginning of new millennium, many fashion designers intend to graft the details of sports wear on order made or ready made clothing and try to show luxury and cheerful fashion design with combination of sporty and romantic factors. Accordingly, theses fashion trends expressed 'Romantic Sports Look' with a harmony or disharmony of unusual factors. The fashion trend of new millennium centering around special cities like New York, Paris, Milan moved to various regional culture. Accordingly, the features of fashion depicted not unique theme but multiplicity of the clothing of dissimilar style or material by the mixture of 2 or 3 factors like the fusion of femininity and masculinity and the combination of past and present of details. That is, the romantic sports look of the contemporary costumes is depicted as the formative beauty of the multi-functional and crossover.

• Restorative Dentistry and Endodontics
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• 제27권1호
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• pp.16-23
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• 2002

Physical properties of composite resins such as strength, resistance to wear, discoloration, etc depend on the degree of conversion of the resin components. The purpose of this study was to evaluate the degree of conversion of the composite resins according to the thickness of tooth structure penetrated by light and applied light curing time. The coronal portions of extracted human teeth (one anterior tooth, three posterior tooth) was embedded by pink denture material. the mounted teeth were cut into three illumination sections (1mm thickness enamel section, 1mm thickness dentin section, 2mm thicknes dentin section) and one backing section with cutting wheel. Thin resin films were made by using 6kg pressure between slide glass during 5 minutes Thin resin film was light cured on coupled illumination section during 40sec, 80sec and 120sec. each illumination section was coupled as follows; no tooth structure(X), ename section(E), enamel section + 1mm dentin section(ED1), enamel section + 2mm dentin section(ED2), enamel section + 1mm dentin section + 2mm dentin section(EDD). To simulate the clinical situation more closely, thin resin films was cured against a backing section of tooth structure. The degree of conversion of carbon double bonds to single bonds in the resin films were examined by means of Fourier Transform Infrared Spectrometer. The results were obtained as follows ; 1 As curing time was increased, conversion rate was increased and as tooth thickness which was penetrated by curing light was increased, conversion rate was decreased. 2. At all tooth thickness groups, conversion rate between 80sec and 120sec was not significantly increased(P＞0.05). 3. At 40sec group and 80sec, conversion rate between no tooth structure(X) group and 1mm enamel section(E) group was not significantly decreased(P＞0.05). 4. At 80sec group and 120sec, conversion rate between 1mm enamel section(E) group and 1mm enamel section + 1mm dentin section(ED1) group was not significantly decreased(P＞0.05).

• 한국의상디자인학회지
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• 제21권4호
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• pp.43-54
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• 2019

This study analyzed the casula wearing by Catholic priests. By understanding various applications of the priests' wearing of casula, we can understand the meaning of wearing casula, situational judgment, and the role and status of priests. Ultimately, the Catholic symbol and meaning of the casula can be found. The purpose of this study is to examine the basic setting of the casula, the setting according to the status of the priest, and the origin of the casula. Second, this study to understand the design of the pattern shown in the casula. The patterns containing the symbol and the liturgical period were examined, and the method of making the pattern design was considered. Third, various symbols appearing in examples of priests' rituals were considered and analyzed. The method of this study was to utilize various pictures acquired during interviews with priests and nuns and to perform content verification. As a result of this study, the aspects of form, color, and pattern were shown through the wearing of casula during various situations. First, the morphological symbols appearing in the rituals are the simplified casula that hangs on the stola on the top of the alb and the symbols of the form according to the priest's status. In the liturgy, the casula is put on the outermost side as for basic wearing, but in the case of celebration or the attendance at celebrations other than the liturgy, it is the same as simplified wearing. Second, in terms of the symbol and color, the basic colored casulas were worn to match the time and character of the liturgy, and in addition, on the priests' ordination ceremony and celebration day the priests wore white casulas. Third, the symbol of the pattern used in the casula was a Cathoric pattern according to the period in the basic casula wearing of the liturgy. In addition, the patterns were produced by combining the patterns and meaning of the priests that were used in the casulas of the priests' ordination ceremony. The design of the pattern used in the beatification mass casula and the Mass of Peace casula during the Pope's visit to Korea in 2014 used the same motif as the Pope's design, but the simplified pattern was produced for the casula of the Cardinal and bishops. Through this, it is possible to understand the situation where a morphological symbol appears due to a distinction according to the role and status of the priest. This shows that the symbols that appear are the cross and should also consider the complexly, shape, color, and pattern.

• 대한치과보철학회지
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• 제41권2호
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• pp.128-135
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• 2003

Statement of problem : Implant screw loosening remains a problem in implant prosthodontics. Some abutment screws with treated surfaces were introduced to prevent screw loosening and to increase preload. DLC(Diamond Like Carbon) film has similar properties on hardness, wear resistance, chemical stability, biocompatibility as real diamond materials. Purpose : The purpose of this study was to investigate the effect of lubricant layer on abutment screw and to discriminate more effective method between soft lubricant and hard lubricant to prevent screw loosening. Material and method : In this study, $1{\mu}m$ thickness DLC was used as protective, lubricating layer of titanium screws and 3 times removal torque was measured on the abutment screws to investigate the difference in 10 coated and 10 non-coated abutment screws. Results : The results indicated that the implants with DLC coating group were not more resistant to the applied force in screw loosening. At 32Ncm, the 3 times removal torque in DLC group were $27.75{\pm}2.89,\;25.85{\pm}2.35$ and $26.2{\pm}2.57$. The removal torque in no-coated abutment screws were $27.85{\pm}4.23,\;27.35{\pm}2.81$ and $27.9{\pm}2.31$, respectively. Conclusion : The lubricant layer used in this study was Diamond Like Carbon(DLC) and it have a properties of hard and stable layer. The DLC coating layer was hard enough to prevent distortion of screws in the repeated unscrewing procedure in clinical situation. The reduced friction coefficient in hard DLC layer was not effective to prevent screw loosening.

• 한국터널지하공간학회 논문집
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• 제21권4호
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• pp.545-560
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• 2019

EPB TBM 굴진 중 다양한 지반 조건에서 적절한 양의 폼(Foam), 폴리머(Polymer) 등 첨가제의 주입은 TBM 공사의 안정성은 물론 굴진 성능을 결정하는 중요한 요소이다. 국외에서는 90년대부터 최근까지 EPB TBM 공법을 토사 지반에 적용할 때 최적의 첨가제 주입에 대한 연구가 활발하게 이루어졌으나 국내에서는 이와 관련된 연구가 매우 부족한 실정이다. 따라서 본 연구에서는 굴착토 컨디셔닝에 가장 널리 사용되는 폼을 첨가제로 선정하고 폼 주입에 따른 토사 지반에서의 TBM 굴진 성능 변화를 일련의 실내 굴진 시험을 통해 파악하였다. 굴진 시험은 인공 사질토 지반을 동일 다짐 조건으로 조성하고 폼의 주입량과 상태를 나타내는 변수인 FIR (Foam Injection Ratio), FER (Foam Expansion Ratio), $C_f$ (Surfactant Concentration) 값을 변화시켜가며 수행되었으며, 각 시험에서 굴진 중 측정된 토크 값을 측정하였다. 또한 굴진 시험 후, 배토된 흙의 슬럼프 값을 비교하여 컨디셔닝 된 시료의 워커빌리티(workability)를 평가하였으며, 블레이드에 설치된 알루미늄 커터의 무게 변화를 측정하여 컨디셔닝 조건에 따른 동일 위치에서의 커터 마모량을 비교하였다. 최종적으로 측정된 토크, 슬럼프 값, 마모량 결과의 비교를 통해 본 연구에서 적용된 인공 사질토 지반에서 최적 TBM 굴진을 위한 폼 주입비를 도출하였다. 연구 결과를 통해 지반 조건에 따라 다른 최적의 TBM 굴진 성능을 확보하기 위해서는 장비 부하, 기계 마모, 워커빌리티 확보에 대하여 적정 수준을 만족하는 폼 주입 조건이 존재하고 이에 대응하기 위한 사전 폼 주입 설계가 필요한 것으로 나타났다.

• 헤리티지:역사와 과학
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• 제47권3호
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• pp.160-171
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• 2014

국가에서는 수작업에 따른 높은 가격과 수요가 없어 작품판매가 부진한 중요무형문화재 종목의 전통공예품 제작 활성화와 활용정책을 펼치고 있다. 전승자들의 작품을 구입하고, 전통공예품관리 시스템 마련과 전통공예품은행 설치, 국내활용을 활성화하기 위한 상설 전시관 운영 등 전통공예품 활용과 관리체계 구축 등이 그것이다. 전통공예품 지원책은 전통공예품의 체계적 관리, 무형문화재에 관심제고, 해외에 한국의 전통적 아름다움을 전파하는 기대효과를 가져온 반면, '전승단절 위기에 처한 무형문화재에 대한 관심확대를 통하여 이수자 확보, 보유자 지원, 종목 활성화 등 협력적 관계망 구성'이라는 성과에는 별다른 영향을 주지 못하고 있는 현실이다. 이것은 지역사회와 전승자가 자부심을 가지고 지역자원으로서 문화적 전통을 확보하는 것이 중요무형문화재의 전승을 활성화할 수 있는 근본적인 토대임에도 불구하고, 전통공예가 처한 지역적 상황에 대한 고려와 전승현장, 그리고 전승자를 포함한 전승집단과 공동체에서 찾지 않았기 때문이다. 이 글에서는 생활과 유리되어 사회적 수요부족 등으로 인해 제작기술의 단절이 우려되는 중요무형문화재 전승취약 종목인 '갓일', '탕건장', '망건장' 등 말총공예분야의 전통의 지속과 변화를 국가의 보호정책을 통해 살폈다. 아울러 무형문화유산으로서 말총공예의 전승활성화를 위해서는 말총공예 제작기술의 전수, 원재료 수급과 수요창출은 물론, 지역사회와 전승자가 자부심을 가지고 자원을 활용하여 지역의 문화적 전통을 확보하고 이를 창조적으로 계승하는 것을 방안으로 제시하였다.