• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
• /
• 제26권2호
• /
• pp.19-30
• /
• 2020

Purpose: The ratio of the visually impaired is gradually increasing due to various causes such as natural aging, accidents, and environmental changes. Therefore, this study has two folds. Firstly, it aims to analyze the current satisfaction level with information facilities for the visually impaired. Secondly, it aims to examine the factors affecting the satisfaction with indoor information facilities. Through this study, it helps to identify problems of information facilities for the visually impaired and it works as a practical data for further improvements. Methods: For 50 visually impaired people, a telephone survey was conducted on the satisfaction with the braille blocks, braille signboards, braille information boards with tactile map, audio guide devices, and safety egress devices. Microsoft Excel and SPSS 26.0 were used for the analysis. Results: It was confirmed that the overall satisfaction with the indoor information facilities was very low. The more the visually impaired people recognized the installation standards, and the better the maintenance was, the higher the satisfaction. In the case of braille blocks and braille signboards, the effect of information transfer on satisfaction was relatively high. In the case of audio guide device and safety egress device, the standard suitability influenced satisfaction. Implications: The low level of satisfaction with the overall information facilities can impede visually impaired people from receiving practical help through the information facilities. Factors influencing the satisfaction level of each facility were identified, which makes it possible to prepare effective improvement measures.

• 대한기계학회논문집A
• /
• 제39권4호
• /
• pp.391-396
• /
• 2015

논문은 가장 보편화 되어있는 양문형 냉장고의 플랜지에서 이슬 맺힘 현상을 방지하기 위한 연구에 대한 논문이다. 양문형 냉장고는 냉동실과 냉장실을 분리하는 벽의 전면부를 플랜지라하고 여기에 양문의 개스킷이 밀착하여 냉기를 차단하는 역할을 한다. 플랜지의 철판에 맺히는 이슬을 방지하기 위해서 $35^{\circ}C$의 고온의 냉매가 흐르는 열선이 삽입된다. 하지만 열선을 삽입함에도 이슬 맺힘 현상이 계속되고 있는데 이것은 열선이 철판 하부에 밀착되지 않아 열선의 열이 철판 하부에 충분히 전달되지 않기 때문이다. 본 논문에서는 열선의 영향을 평가하고 열선과 철판 하부가 충분한 열전달을 할 수 있는 구조를 제안하고 그 타당한지 확인하였다.

• 한국강구조학회 논문집
• /
• 제9권2호통권31호
• /
• pp.181-191
• /
• 1997

케이블이 가설되기 전까지 외팔보 형태로 지지되는 현수교의 주탑에 불규칙적인 변동 공기력이 작용할 때 발생하는 버페팅은 구조물의 기본 고유진동수와 일치하는 풍속이 존재하고 이에 따른 주탑의 공진에 의해 큰 응답을 유발할 수 있다. 버페팅 하중에 의한 동적 응답을 감소시키기 위해서 제진장치의 일종인 TMD(Tuned Mass Damper)를 부착한 주탑의 거동특성에 관한 연구를 유한요소법에 의하여 시간영역에서 수행하였다. 버페팅 하중을 구하기 위하여 주파수 영역의 속도스펙트럼을 시간영역의 무작위변량으로 변환시켰으며, peak factor를 이용하여 일정기간동안 일어날 수 있는 구조물의 최대 변위의 기대치를 구하였다. 최적의 TMD 부착위치와 제원을 변수별 수치해석을 통하여 결정하였으며, 최적의 제원을 갖는 TMD에 의한 풍속별 진동제어 효과를 검토하였다.

• 한국토양비료학회지
• /
• 제47권1호
• /
• pp.16-22
• /
• 2014

This study was conducted to determine the changes in soil chemical properties and the growth of seedling according to the different dredged soil improving methods at slope of Saemangeum sea dike. Undersea dredged soil was improved by five different methods. Seedlings of Ulmus davidiana var. japonica, Chionanthus retusa, Celtis sinensis, and Pinus thunbergii were planted after 9 month of experience site installation, then soil pH, NaCl concentration in soil, soil organic matter (SOM), and survival rate and height of seedling was measured. Initial soil pH was highest in the control plot but it decreased to the similar level with other soil improving plots after 35 months. There were no differences in NaCl concentration between the control and soil improving plots, and it showed decreasing tendency during the study period. In the control plot, initial SOM was lowest among that of other plots during the study period. The survival rate of 36 months after planting of P. thunbergii was highest among the species. The gap of the tree growth of P. thunbergii between the control plot and the soil improving plots was small, however, other species showed relatively higher tree height in the soil improving plots than the control plots. Creation forest with P. thunbergii might be a cost effective afforestation in coastal reclaimed land since it rarely needs additional improvement of dredged soil.

• 한국압력기기공학회 논문집
• /
• 제9권1호
• /
• pp.15-19
• /
• 2013

The auxiliary feedwater is an important to remove the heat from the reactor core when the main feedwater system is unavailable. In most initiating events in Probabilistic Safety Assessment(PSA), the operaton of this system is required to mitigate the accidents. For one of domestic nuclear power plants, a design change of a turbine-driven auxiliary feedwater pump(TD-AFWP), pipe, and valves in the auxiliary system is implemented due to the aging related deterioration by long time operation. This change includes the replacement of the TD-AFWP, the relocation of some valves for improving the system availability, a new cross-tie line, and the installation of manual valves for maintenance. The design modification affects the PSA because the system is critical to mitigate the accidents. In this paper, the safety effect of the change of the auxiliary feedwater system is assessed with regard to the PSA view point. The results demonstrate that this change can supply the auxiliary feedwater from the TD-AFWP in the accident with the motor-driven auxiliary feedwater pump(MD-AFWP) unavailable due to test or maintenance. In addition, the change of MOV's normal position from "close" to "open" can deliver the water to steam generator in the loss of offsite power(LOOP) event. Therefore, it is confirmed that the design change of the auxiliary feedwater system reduces the total core damage frequency(CDF).

• 한국실내디자인학회논문집
• /
• 제19권5호
• /
• pp.11-20
• /
• 2010

User-oriented Design is necessary in planning the interior design of Metropolitan Railroads trains, since this is a typical means of transportation in this modem society and all ages people with different body scale use this facility. However, there are little studies about facility panning and zoning of Metropolitan Railroads train considering users. Therefore, in this study, after completing the checklist based on the current legal standards of facility installation of South Korea and Japan, we examined user's facility and suggest several improvement of the opening 14 metropolitan railroad lines in Seoul. Then, we evaluated this facilities according to 41 standards; general facility(24 standards), safety facility(4 standards), guide facility(11 standards), other facility(4 standards). The result of this study may be summarized as follows. 1) General facility has to be designed to obtain lots of room for storage and this facility should be fixed up tightly with secure system. 2) Safety facility should be designed to minimize a difference of floor-level between threshold of train and ground. Also, using various color and material could help passengers to distinguish different space and facility. 3) Guide facility should be designed to guide passengers to the accurate direction with proper sign design in the pathway of Metropolitan railroad train. Also, more various color, which based on the research about physiological and psychological effect, should be used to guide people. 4) Other facility should equip more visual system using common good and informative contents. Through this study, we try to understand the current interior physical condition of Metropolitan Railroads trains. However, for future studies, it is expected to supplement evaluation standards considering aesthetic design, environmental improvement of indoor air quality and the satisfaction and demand of Metropolitan Railroads trains.

• 한국산학기술학회논문지
• /
• 제13권12호
• /
• pp.5950-5957
• /
• 2012

흉부압박의 중단을 최소화하는 심폐소생술은 환자의 생존율 향상을 위한 중요한 요소이다. 본 연구의 목적은 이동 중 주들것에서 보조발판(C-step) 장착 여부에 따른 심폐소생술 정확도 및 오류를 파악하는 데 있다. 연구대상자는 C도 10개 소방서에 근무하고 있는 1급 응급구조사 70명(대조군 35명, 실험군 35명)으로 주들것에서 심폐소생술 정확도가 측정되었다. 연구결과 C-step을 적용한 주들것에서 심폐소생술은 적절한 흉부압박 높이와 안정된 자세를 제공해 흉부압박 정확도를 높이고(t=65.104, p=.000), 인공호흡 시 적절한 환기량을 공급하여 인공호흡 정확도를 높이며(t=5.207, p=.000) 심폐소생술 자신감 또한 향상시키는 것으로 나타났다(t=-10.612, p=.000). 결론적으로 주들것에 C-step 장착은 고품질의 심폐소생술(high quality CPR)을 충실히 수행해 심정지 환자의 생존율을 높이는데 도움이 될 것으로 사료된다.

• Geomechanics and Engineering
• /
• 제8권1호
• /
• pp.113-132
• /
• 2015

In this study, lime (L), silica fume (SF), and lime-silica fume (L-SF) mix have been used for stabilizing and considering their effects on the soft clay soil. The improvement technique adopted in this study includes improving the behaviour, of a square footing over soft clay through grouting the clay with a slurry of lime-silica fume before and after installation of the footing. A grey-colored densified silica fume is used. Three percentages are used for lime (2%, 4% and 6%) and three percentages are used for silica fume (2.5%, 5%, 10%) and the optimum percentage of silica fume is mixed with the percentages of lime. Several tests are made to investigate the soil behaviour after adding the limeand silica fume. For grouting the soft clay underneath and around the footing, a 60 ml needle was used as a liquid tank of the lime-silica fume mix. Slurried silica fume typically contains 40 to 60% silica fume by mass. Four categories were studied to stabilize soft clay before and after footing construction and for each category, the effectiveness of grouting was investigated; the effect of injection hole spacing and depth of grout was investigated too. It was found that when the soft clay underneath or around a footing is injected by a slurry of lime-silica fume, an increase in the bearing capacity in the range of (6.58-88)% is obtained. The footing bearing capacity increases with increase of depth of grouting holes around the footing area due to increase in L-SF grout. The grouting near the footing to a distance of 0.5 B is more effective than grouting at a distance of 1.0 B due to shape of shear failure of soft clay around the footing.

• Journal of Astronomy and Space Sciences
• /
• 제33권2호
• /
• pp.137-146
• /
• 2016

The correlation between meteorological data collected at the optical wide-field patrol network (OWL-Net) Station No. 1 and the seeing of satellite optical observation data was analyzed. Meteorological data and satellite optical observation data from June 2014 to November 2015 were analyzed. The analyzed meteorological data were the outdoor air temperature, relative humidity, wind speed, and cloud index data, and the analyzed satellite optical observation data were the seeing full-width at half-maximum (FWHM) data. The annual meteorological pattern for Mongolia was analyzed by collecting meteorological data over four seasons, with data collection beginning after the installation and initial set-up of the OWL-Net Station No. 1 in Mongolia. A comparison of the meteorological data and the seeing of the satellite optical observation data showed that the seeing degrades as the wind strength increases and as the cloud cover decreases. This finding is explained by the bias effect, which is caused by the fact that the number of images taken on the less cloudy days was relatively small. The seeing FWHM showed no clear correlation with either temperature or relative humidity.

• 한국항해항만학회지
• /
• 제36권10호
• /
• pp.911-916
• /
• 2012

본 연구는 상용화를 앞두고 있는 위그선의 국내 연안여객운송시장 도입시 문제점을 사전 검토하고 효과적인 상용화를 위한 정책을 제시함에 있다. 차세대 해상운송수단으로 개발중인 위그선은 현재 연안여객시장에서 활동중인 초고속 선박보다 매우 빠른 속도로 운항하면서도 비행기보다 저렴하고 연비가 매우 우수해서 경제적인 운송수단으로 기대받고 있다. 위그선의 상용화는 국내 연안여객 운송시장에서 시작될 것으로 예상되며, 따라서 본 연구에서는 효과적인 위그선의 연안여객운송시장 도입 방안을 도출하기위해 AHP기법을 이용했다. 그 결과 위그선 관련법 정비, 계류장 설치 및 운영, 위그선 관제 및 통제, 조종사 고용 및 훈련, 위그선 유지보수, 위그선 선급인증 순으로 우선순위가 나타났다.