• International journal of advanced smart convergence
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• 제10권4호
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• pp.233-240
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• 2021

The purpose of this study was to provide a 360-degree video on intensive care unit admission guidance to family members admitted to the intensive care unit, and then to identify anxiety, safety perception, and satisfaction. This study was a single-group pre-post design, and the data collection period was from October 1, 2020 to August 30, 2021. The subjects of this study were 19 people who applied 360 degree hospitalization guide video. For data analysis, SPSS WIN 24.0 program was used, and real number, percentage, mean, standard deviation, minimum value, maximum value, and Wilcoxon signed rank test were used. The subjects' anxiety before intervention was an average score of 6.21±2.30 and the anxiety after intervention was an average score of 3.95±2.46, which was statistically significant (z=4.13, p<.001). The safety consciousness of the subjects before the intervention was an average of 4.08±0.39 and the safety consciousness after the intervention was an average of 4.54±0.48, which was statistically significant (z=5.00, p=.001). The highest level of satisfaction with the 360-degree hospitalization guidance image of the subjects was 4.58±0.51 and the lowest was 4.16±0.96. In this study, when 360-degree hospitalization guide video was applied, there was a difference in anxiety and safety perception, and satisfaction was high. Based on the research results, various programs for guardian education can be developed and utilized in the future.

• 콘크리트학회논문집
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• 제19권1호
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• pp.27-37
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• 2007

이 연구의 목적은 초기재령 콘크리트가 동해를 입을 경우가 예상될 때, 동해저항성을 확보하는데 필요한 최소 양생 시간의 예측법을 제안하는 것이다. 먼저, 실험을 통하여 동해시점이 지연될수록, w/c가 낮을수록, 그리고 1종 시멘트보다 3종 시멘트를 사용한 콘크리트가 동해에 의한 압축강도 감소율이 낮으며 동해는 얼음결정의 형성과 성장을 통해 발생됨을 확인하였다. 초기재령 콘크리트가 동해를 입었을 경우, 콘크리트 내에 존재하는 모세공극의 자유수가 얼음으로 상변화를 일으키면서 압축강도의 감소를 유발하므로 동해저항성은 모세공극의 포화도에 따라 결정된다. 따라서, 모세공극의 임계포화도 개념을 근거로 초기동해의 방지를 위한 최소양생시간의 예측법을 제안하였다.

• 한국항해항만학회지
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• 제33권1호
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• pp.1-7
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• 2009

항행속력규제는 통항안전성을 확보하기 위한 중요한 요소로서, 지금까지는 최고속력규제에 대하여만 연구 검토되어지고 있다. 최근 우리나라 항만에서는 중량물 운반용 예부선 등을 포함한 저속 항행선박으로 인하여 선박운항자의 위험부담감은 점점 증가하고 있다. 본 연구에서는 이러한 저속선박에 대한 최저속력 규제의 필요여부와 교통용량별 적정 최저속력을 산출하여 제안하였다. 이 연구의 구체적인 결과는 다음과 같다. (1) 시간당 통항척수가 5척의 경우에 최저속력을 5kts 이상으로 설정하면 속력규제 효과가 높다 (2) 시간당 통항척수가 10척 이상의 경우에 최저속력을 7kts로 설정하여야 속력규제 효과가 다소 있다 (3) 반면에, 통항척수가 많은 해역에서는 상대속력차가 적은 선박이 다수 발생하여, 선박 간 좁은 이격거리로 장시간 항행하여야 하므로 최저속력규제의 효과가 없는 것으로 판단된다.

• 생물환경조절학회지
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• 제23권3호
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• pp.192-198
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• 2014

To establish the design criteria for seasonal heating load calculation in greenhouses, standard weather data are required. However, they are being provided only at seven regions in Korea. So, instead of using standard weather data, in order to find the method to build design weather data for seasonal heating load calculation, heating degree-hour and heating degree-day were analyzed and compared by methods of fundamental equation, Mihara's equation and modified Mihara's equation using normal and thirty years from 1981 to 2010 hourly weather data provided by KMA and standard weather data provided by KSES. Average heating degree-hours calculated by fundamental equation using thirty years hourly weather data showed a good agreement with them using standard weather data. The 24 times of heating degree-day showed relatively big differences with heating degree-hour at the low setting temperature. Therefore, the heating degree-hour was considered more appropriate method to estimate the seasonal heating load. And to conclude, in regions which are not available standard weather data, we suggest that design weather data should be analyzed using thirty years hourly weather data. Average of heating degree-hours derived from every year hourly weather data during the whole period can be established as environmental design standards, and also minimum and maximum of them can be used as reference data for energy estimation.

• 한국태양에너지학회 논문집
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• 제23권3호
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• pp.63-71
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• 2003

According to the recent report, the lighting energy consumption of commercial buildings reaches to $30%\sim40%$ of the total energy consumption. It is more than that of cooling & heating energy consumption and it is the major target of energy-saving policy. It is obvious that they are interested in natural lighting device such as Light-shelf for the purpose of raising the lighting energy-saving efficiency. In most of highly developed countries, a thorough study on Light-shelf makes it possible to propose a practical plan while at home there leaves much to be desired to study a guiding principle of optimum plan in spite of its efficiency based on experiments using scale4 model and analysis of simulation. Aiming at making an optimum plan of Light-shelf suitable for the domestic situation, this study is worked by experiments using light-shelf and analysis of variables using illumination program. The experiments is to analyse the efficiency of Light-shelf on condition of the sky and the analysis is to make the simulation using illumination program. This study is composed of 1) the analysis of light with some variables such as presence of light-shelf and degree of angle using 1/2 scaled model 2) making the simulation using Lightscape, illumination program, In brief, concerning presence of light-shelf, it causes little difference in its efficiency in the overcast sky, whereas it decreases an illuminance of window side and provides inner side with the light, which decreases the ratio of the maximum to the minimum inner illuminance and makes the inner of illuminance to range evenly in the clear sky. On degree of angle, as the daylight increases in proportion of degree of angle, the ratio of the maximum to the minimum inner illuminance decreases, which makes it possible to increase the proportion of inner daylight.

• 대한방사선기술학회지:방사선기술과학
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• 제2권1호
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• pp.23-29
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• 1979

Roentgenographic film has to be handled with greatest care during removal from the packing, loading of the cassettes and loading of the hanger. In the case of prior to or after exposed film is handled with mechanical pressure in darkroom, the most common phenomena are desensitization or sensitization on roentgenographic film. In order to observe these defect occurring on, it, the author studied on change of the densities where the mechanical pressure reached to the roentgenographic film. 1. The optimal minimum and maximum densities in routine chest x-ray film are from 0.25 to 1.47 2. The dependence of the desensitization occurring on film upon the bent degree of film is in the portion to bent degree over $10^{\circ}$ 3. Appearances of the desensitization on film by the curved degree of film is inverse proportion to it's degree below intervals of 3cm. 4. The more unexposed film is bent with nail tip and is pressured with palm, the more desensitization it was appeared upon film size and pressure weight. 5. The most serious area of desensitization produced by many types of mechanical pressure is in the portion of lung apex and outside lung fields. 6. The tendency of desensitization due to mechanical pressure on unexposed film is more serious than sensitization on exposed film in the view of radiologic diagnosis.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.507-514
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• 2005

In this construction case study, Crushed stone under 100mm diameter was carried out a test compacted construction for subgrade in the 3rd. runway of the 2th Incheon International Airport Construction area. Conforming to specification needs a minimum rolling compacted number 10 for upper subgrade 100% compaction degree indicated in Federal Aviation Administration and $K_{30}{\geq}20kgf/cm^3$ in plate bearing test. $K_{30}$ to be acquired 100% compaction degree of upper subgrade is confirmed to about $31kgf/cm^3$ from correlation $K_{30}$ vs relative compaction degree.

• 제어로봇시스템학회논문지
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• 제4권3호
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• pp.360-371
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• 1998

In this paper, output precision characteristics of a planar 6 degree-of-freedom parallel mechanisms are investigated, where the 6 degree-of-freedom mechanism is formed by adding an additional link along with an actuated joint in each serial subchain of the planar 3 degree-of-freedom parallel mechanism. Kinematic analysis for the parallel mechanism is performed, and its first-order kinematic characteristics are examined via kinematic isotropic index, maximum and minimum input-output velocity transmission ratios of the mechanisms. Based on this analysis, two types of planar 6 degrees-of-freedom parallel manipulators are selected. Then, dynamic characteristics of the two selected planar 6 degree-of-freedom parallel mechanisms, via Frobenius norms of inertia matrix and power modeling array, are investigated to compare the magnitudes of required control efforts of both three large actuators and three small actuators when the link lengths of three additional links are changed. It can be concluded from the analysis results that each of these two planar 6 degrees-of-freedom parallel mechanisms has an excellent control-in-the-small characteristics and therefore, it can be very effectively employed as a high-precision macro-micro manipulator when both its link lengths and locations of small and large actuators are properly chosen.

• 에너지공학
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• 제8권4호
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• pp.576-582
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• 1999

과냉각수 이용 아이스슬러리 제빙시스템은 기존 제빙방식에 배히 많은 장점이 있지만, 열교환기 내 빙결정의 성장으로 인한 관내동결이 발생하기 쉽다. 이러한 관내동결조건을 알아보기 위한 기본실험으로 정지상태 증류수와 수도수의 과냉각도를 알아보고 시험관재질이 과냉각도에 미치는 영향 등에 대해 검토하였다. 또한 , 첨가한 메타알데이드 농도가 임계 과냉각 해소범위가 좁게 나타났으며, 과냉각 해소에대한 시험관별 표준편차는 파이렉스 경우 1.8 스테인레스강 2.0을 보였다. 최소 과냉각도는 파이렉스 6.2$^{\circ}C$ , 스테인레스 5.5$^{\circ}C$ 로서 파이렉스가 약 0.7$^{\circ}C$크게 나타났다. 메타알데히드는 실험횟수가 증가하여도 그 성질을 유지하면서 빙 활성화물질로써 작용하는 것으로 나타났다.

• Journal of Acupuncture Research
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• 제31권2호
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• pp.153-163
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• 2014

Objectives : To investigate the clinical results of patients who were diagnosed with grade II spondylolithesis treated with Korean medicine of relaxative Chuna and Gangchuk herbal medicine. Methods : We reviewed medical records of four patients diagnosed with grade II spondylolisthesis. Each patient has taken intensive Korean medical admission treatment at Mokhuri Hospital. All patients received treatments of Gangchuk herbal medicine, relaxative Chuna and acupuncture during admission period. Before treatment and every after 7-day treatment the patient's pain and walking distance without pain were assessed. The zero minimum to ten maximum pain numeric rating scale(NRS) was used to determine the degree of pain. Results : Average admission duration was 23 days. All the patients' NRS decreased from median figure of 7.5[the minimum 7 to the highest 8] to median figure of 1[the minimum 0 to the highest 2]. Walking distance without pain increased from a median of 55 m[the minimum 20 m to the highest 100 m] to median of 165 m[the minimum 100 m to the highest 250 m]. Conclusions : Intensive conservative korean medical treatment was effective in reducing pain and functional improvement for grade II lumbar spondylosisthesis patients.