• 성인간호학회지
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• 제26권2호
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• pp.191-202
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• 2014

Purpose: This study was aimed to survey the actual caregiving conditions of family caregivers who are caring patients with rare and incurable diseases using home ventilators at home, and to clarify any factors affecting their burdens and quality of life. Methods: A questionnaire survey was performed by the 159 subjects, and the questionnaires contained the actual conditions of caregiving activities, and caregiver's burdens and quality of life. The collected data was analyzed by ANOVA, Pearson's correlation, and stepwise linear regressions. Results: The mean of burden scores was 3.55 out of 5, and influencing variables included the relationships with patient (spouse), respite (moderate), health status, and diagnosis (non ALS), with the explanatory power of 30.0%. The mean of the quality of life was 2.58 point, and the influencing variables included burdens, health status, and respite (enough), with the explanatory power of 39.0%. Conclusion: In order to improve the quality of life among family caregivers caring for patients with using a home ventilator, it is required to develop strategies for reducing caregiving burdens as well as to introduce family respite welfare systems to family caregivers.

• 생물환경조절학회지
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• 제10권4호
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• pp.225-231
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• 2001

This study was conducted to examine effect of different environment conditions in glass, PC, PET and PE greenhouses controlled by different environment control systems on the growth of green pepper. Light transmittance of 64.7% in the glass greenhouse was the highest among different green-houses. Air temperature was the highest in the glass greenhouse when ventilators were closed, and was the highest in the PE greenhouse when ventilators were open. Air relative humidity was the highest in the PE greenhouse during 24 hours. The amount of solar energy accumulated in soil was the greatest in the glass greenhouse and this energy released during the night escaped through covering materials. Latent heat and solar energy affected air temperature increased in greenhouses. The air temperature of glass greenhouse was 27.5$^{\circ}C$ at 11 O clock, which was the highest air temperature among the all greenhouse types. Clear differences were observed in leaf area and plant height at 30 days after transplanting. Days to first flowering was the shortest in the glass greenhouse with 72.7 days. Flower shedding was the greatest in the PE greenhouse with 12.6%. Days to fruit harvesting was the shortest in the glass greenhouse with 14.3 days. Fruit quality, such as fruit length, fruit diameter, fruit flesh thickness, and vitamin C content, was the best in the glass greenhouse. Percent marketable fruits was the highest with 95.3% when the pepper was grown hydroponically in the glass greenhouse.

• Journal of Advanced Marine Engineering and Technology
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• 제40권6호
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• pp.468-475
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• 2016

본 연구에서는 기존 열회수형 환기장치의 음향 문제점을 파악하고, 흡음덕트 설치위치별 열회수형 환기장치의 소음저감 방안을 강구하기 위하여 관련된 국내 외 규격을 기준으로 열회수형 환기장치의 크기, 풍량 및 흡음덕트 길이를 파라미터로 한 발생소음을 측정하여 비교하고 고찰하였다. 그 결과, 무향실에서 열회수형 환기장치에 대한 소음은 흡음덕트를 설치하지 않았을 경우에 소형 및 중형 모두 풍량에 관계없이 거의 대부분 소음기준인 50 dB(A) 보다 높게 나타났고, 흡음덕트를 설치하였을 경우에는 소음도가 감소됨을 알았다. 또한, 흡음덕트의 길이에 따른 주파수 대역별 음압수준은 소형과 중형 열회수형 환기장치에서 흡음덕트의 길이가 클수록 대체적으로 감소하였고, 풍량이 클수록 대체적으로 음압수준이 증가하였다.

• 설비공학논문집
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• 제28권6호
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• pp.232-241
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• 2016

Installing a ventilator for an apartment house composed of over 100 dwelling units was mandated in 2006 to improve indoor air quality. In the case of mechanical ventilators, the air change rate is kept stable, however 68% of dwellers do not operate their ventilator because of an increased electrical bill and noise. In the case of natural ventilators, the former problems are settled, but there are concerns about cold draught and an increase of heating/cooling cost. Authors are developing a heat recovery type natural ventilator which is a natural ventilator equipped with total heat recovery element, and it is expected that those problems of mechanical ventilator and natural ventilator are resolved by this. The combined type diffuser of this study is an under developed fit to the heat recovery type natural ventilator above. There are no standards to evaluate the performance for this type of diffuser. Due to this issue this study investigated the performance of the ventilation and maintained a thermal environment for the combined type diffuser by comparing it with existing diffusers. The results revealed that the performances of the combined type of diffusers showed different features from the existing ones, and was estimated to be high enough in the performances above.

• Journal of Hospice and Palliative Care
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• 제22권4호
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• pp.198-206
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• 2019

목적: 호스피스 및 완화치료 환자 또는 임종단계 환자를 위한 연명 치료 결정에 관한 법안은 2016년에 제정되어 2018년 2월부터 시행 되었다. 이 법안의 취지와 내용은 미국의 POLST에 근거한다. 이 연구의 목적은 미국의 POLST를 변형하여 만든 MK-POLST를 호스피스 병동 환자들에게 적용을 한 뒤 각 항목에 대한 선호도 및 시행 일치율을 조사하는 것이다. 방법: 2017년 2월 1일부터 2019년 4월 30일까지 경상대학교병원의 부속 호스피스 병동의 모든 입원 환자의 MK-POLST에 대한 의무기록을 후향적으로 분석하였다. 결과: 총 387명의 연구대상자 중 295명의 환자가 MK-POLST를 작성했다. MK-POLST는 환자 자신이 133건(44.1%), 배우자가 84건(28.5 %), 자녀가 75건(25.4%) 작성했다. MK-POLST가 작성된 295 명의 환자 중 단 13명(4.4%)이 주사 영양제를 거부하였으며, 5명(1.7%)은 완화적 진정을 거부하였지만, 대다수인 288명(97.6%)이 심폐소생술 및 인공호흡기 치료를 원하지 않았고, 226명(76.9%)이 승압제 사용을 원하지 않았다. 인공호흡기, 심폐소생술 및 완화적 진정을 제외한 모든 MK-POLST 항목의 시행 일치율에 대한 Kappa 값은 낮았다. 결론: 호스피스 환자들은 심폐소생술, 인공호흡기 및 승압제 사용은 거부 했지만, 대조적으로 항생제, 주사 영양제 및 완화적 진정은 대다수 또는 절대적인 경우에 선호했다.

• 대한치과기공학회지
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• 제33권1호
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• pp.93-102
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• 2011

Purpose: The study aimed to evaluate working environment for dental technician by measuring dust level, ventilation conditions and the use of personal protective equipment and to provide basic information required to improve working environment and develop health education programs for dental technician. Methods: A total of 240 dental technician who are registered with the Daegu Association of Dental technician and working at 34 dental laboratories participated in the study. And the dust level was measured at 21 different spots in 16 dental laboratories out of 34. Results: Of 34 dental laboratories, 31 (91.2%) were equipped with a ventilator, but the remaining 3 (8.8%) did not have a ventilator. By the number of ventilator, 1 to 3 ventilators were found in 22 dental laboratories (71.0%), 4 to 6 ventilators were in 7 laboratories (22.5%) and more than 7 ventilators in 2 laboratories(6.5%). According to the frequence of changing filters in dust collector, 20 dental laboratories (58.9%) changed filters every four weeks, 10 laboratories (29.4%) changed them every six weeks and 4 laboratories (11.7%) changed them every eight weeks. Of total respondents, 114 (61.3%) said they wore a mask all the time while working, 56 (29.6%) said they frequently wore a mask, 19 (10.1%) said they did not wear a mask. As for the type of masks, 159 (84.1%) used a disposable mask, 25 (13.2%) used a cotton mask and 5 (2.7%) used an anti-dust mask. For dust sat on their outfits while working, 102 (54.0%) shook their uniforms inside workplace to keep dust off the uniforms, 64 (33.9%) did not anything until they wash their uniforms and 23 (12.1%) shook their uniforms outside workplace to keep dust off the uniforms. Of total respondents, 182 (96.3%) had a particle in their eyes while carrying out grinding work. Based on the measurement of floating dust at workplace, 3 dental laboratories showed dust concentration exceeding the minimum level of 10 mg/$m^3$ allowed under the permit for environment. Of those, 1 laboratory had the dust concentration that was more than 1.5 times higher than the minimum level. Dust concentration was higher in laboratories that used a dust collector with 0.5 horse power and changed filters more than 3 weeks ago. Dust comprised of nickel (more than 70%), chrome (9%) and others. The mean chrome concentration was more than twice higher than the minimum permissible level of 0.5 mg/$m^3$. There were two laboratories that showed chrome concentration exceeding the level of 0.4 mg/$m^3$. Like dust concentration, chrome level was higher in laboratories that used a dust collector with 0.5 horse power and changed filters more than 3 weeks ago. There were six laboratories that had nickel concentration exceeding the minimum permissible level of 1 mg/$m^3$. Of those, one laboratory had nickel concentration that was more than three times higher than the minimum permissible level. Nickel concentration was also higher in laboratories that used a dust collector with 0.5 horse power and changed filters more than 3 weeks ago. Conclusion: It is not likely that heavy metal concentrations found in the study constitute respiratory dust. It is however necessary for health of dental technician to apply the Industrial Safety and Healthy Law to dental laboratories and make recommendations for the use of personal protective equipment, installation of a proper number of ventilators, more frequent change of filters in dust collector and improved ventilation for polishing work. At the same time, dental technician need education on how to use personal protective equipment and how to efficiently remove dust from their uniforms.

• 한국산업융합학회 논문집
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• 제21권3호
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• pp.133-139
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• 2018

Precipitator is the most widespread device used to separate dust particles from the exhaust gas. In the shipyard, welding umbrellas, spark protection covers, and ventilators are not purchased and used for the work place to capture the flames and high temperature metal dust generated during the gardening process. In particular, a thorough analysis of design factors, such as capture rate, collection capacity calculation, filter speed, and materials selection, is required since spatial constraints are followed by structures, etc. In this study, conceived to address problems such as this cyclone and filtration filter system that combines all-in-one gausing collector prototype. Assessed through interpretation through the validity of the design and reliability.

• 설비공학논문집
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• 제29권2호
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• pp.68-73
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• 2017

Recently, energy recovery ventilators (ERVs) have been installed for energy saving in many multi-residential buildings in Korea. The performance of the heat exchanger of an ERV is analyzed in this study under specific indoor and outdoor conditions in a test-cell measurement. However, the performance of the heat exchanger varies according to the indoor and outdoor condition. In this study, the performance of energy recovery of the ventilation system was therefore analyzed in actual weather conditions using field measurement. Experiments were conducted under winter conditions in a multi-residential building for 20 days. Based on the measurement results, the characteristics of sensible heat and latent heat exchange rates were analyzed.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 추계 학술논문 발표대회
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• pp.54-55
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• 2017

The High-rise building has a problem the ventilation performance of natural ventilator by stack effect that it occurs by pressure difference. For that reason the study about natural smoke ventilator of High-rise building consistently needs. Therefore on this study does analysis of difference with abroad through investigate of Natrual smoke ventilator's law, it conducts of natural smoke ventilator's research on the actual condition. As a result on this study, in the case of abroad that it states more specific standards than domestic. Also the result of a field study, it shows that the natural smoke ventilator is installed same size and the number regardless of building's pressure difference.

• 터널과지하공간
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• 제20권2호
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• pp.92-96
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• 2010

본 연구에서는 지하공간에서 화재 발생시 배연장비의 연기배출 성능을 평가하기 위하여 실험을 실시하였다. 배연장비로는 이동식 송풍기를 사용하였으며 가연물질로는 에탄올을 사용하였다. 한 변의 길이가 80cm의 정사각형 화원을 사용하였으며 최대 열방출률은 약 460 kW이다. 급기방식 배연의 영향을 평가하였다. 급기방식의 경우 실내의 가시도 향상 및 온도감소 효과를 확인할 수 있었다.