• Title/Summary/Keyword: Control Rooms

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House Dust Mites and Associated Environmental Factors in Homes of Atopic Children: a Case-Control Study (아토피 아동 가정내 집먼지 진드기 농도와 환경요인: 환자 대조군 연구)

  • Kim, Sung-Ho;Park, Dong-Jin;Byun, Hyae-Jeong;Lee, Hyun-Soo;Oh, In-Bo;Sim, Chang-Sun;Kim, Yang-Ho;Yoon, Chung-Sik
    • Journal of Environmental Health Sciences
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    • v.38 no.3
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    • pp.204-212
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    • 2012
  • Objectives: The purpose of this study was to determine house dust mite concentrations in living rooms and bedding materials in atopic case-control groups. Methods: Fifty four homes with children suffering atopic diseases as cases and fifty one homes without atopic diseases as controls were selected after diagnosis at three elementary schools in Ulsan City. Dust samples were collected from the living rooms and bedding materials in each home during summer and winter with a vacuum cleaner and analyzed for house dust mites using enzyme-linked immunosorbent assay (ELISA). Environmental factors and family history were surveyed during sampling. Results: Both species of house dust mite Dermatophagoides farina (Der f 1) and Dermatophagoides pteronyssinus (Der p 1) were found in all homes. Derf1 concentrations were much higher than Der P1 concentrations, both in atopic homes (1518.9 vs. 27.0 ng/g. dust, respectively) and non-atopic homes (810.8 vs. 44.3 ng/g. dust, respectively). Der f 1 concentrations were significantly higher in the atopic group than in the non-atopic group (atopic: 1518.9 ng/g.dust, non-atopic: 810.8 ng/g.dust, p = 0.035). However, total house dust mite Der p 1 concentrations were significantly higher in the non-atopic group than in the atopic group (atopic: 27.0 ng/g.dust, non-atopic: 44.3 ng/g.dust, p = 0.035). Multiple regression implied that mothers with family history of atopic diseases (OR = 4.79, 95% CI = 1.81-12.69), Der f 1 concentrations (OR = 1.74, 95% CI = 1.07-2.81), and air freshener use (OR = 4.60, 95% CI = 1.72-12.34) had significant associations with atopic children. Conclusion: House dust mite Der f 1 concentrations were associated with atopic children. This study suggests that parents should reduce house dust mite Der f 1 concentrations through environmental controls.

Fire Modeling and Smoking Control Characteristic Analysis of Electric Room by Using FDS (FDS를 이용한 전기실의 화재모델링 및 연기제어 특성 분석)

  • Choi, Jeong-A;Lee, Min-Gu;Lee, Dae-Dong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.3
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    • pp.662-668
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    • 2018
  • Most electric rooms are located in the underground spaces of buildings. When a fire occurs in electrical equipment, the fire expands to cable insulation material, resulting in toxic smoke and combustion products. If the smoke and combustion products quickly move vertically and horizontally, the evacuation of occupants and firefighting activities will be hindered. Therefore, it is necessary to design optimal equipment for smoke control in cases of fires in electric rooms. This study analyzes the characteristics of smoke and combustion products in fires in a cubicle-type switchboard in an electric room using PyroSim, which is based on the program Fire Dynamics Simulator (FDS). The fire modeling consists of four scenarios according to the operation mode of the mechanical ventilation equipment, the amount of air supply and exhaust, and the location of the air supply slot. The analysis shows that the mechanical ventilation equipment improves the smoke density, visibility, carbon monoxide concentration, and temperature characteristics. The visibility and temperature characteristics were improved when the air flow rate and the location of the air supply slot from fire defense regulations were applied.

Guidelines for dental clinic infection prevention during COVID-19 pandemic (코로나 바이러스 대유행에 따른 치과 의료 관리 가이드라인)

  • Kim, Jin
    • Journal of Korean Academy of Dental Administration
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    • v.8 no.1
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    • pp.1-7
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    • 2020
  • Dental settings have unique characteristics that warrant specific infection control considerations, including (1) prioritizing the most critical dental services and provide care in a way that minimizes harm to patients due to delayed care, or harm to personnel from potential exposure to persons infected with the COVID-19 disease, and (2) proactively communicate to both personnel and patients the need for them to stay at home if sick. For health care, an interim infection prevention and control recommendation (COVID-19) is recommended for patients suspected of having coronavirus or those whose status has been confirmed. SARS-CoV-2, which is the virus that causes COVID-19, is thought to be spread primarily between people who are in close contact with one another (within 6 feet) through respiratory droplets that are produced when an infected person coughs, sneezes, or talks. Airborne transmission from person-to-person over long distances is unlikely. However, COVID-19 is a new disease, and there remain uncertainties about its mode of spreads and the severity of illness it causes. The virus has been shown to persist in aerosols for several hours, and on some surfaces for days under laboratory conditions. COVID-19 may also be spread by people who are asymptomatic. The practice of dentistry involves the use of rotary dental and surgical instruments, such as handpieces or ultrasonic scalers, and air-water syringes. These instruments create a visible spray that can contain particle droplets of water, saliva, blood, microorganisms, and other debris. While KF 94 masks protect the mucous membranes of the mouth and nose from droplet spatter, they do not provide complete protection against the inhalation of airborne infectious agents. If the patient is afebrile (temperature <100.4°F)* and otherwise without symptoms consistent with COVID-19, then dental care may be provided using appropriate engineering and administrative controls, work practices, and infection control considerations. It is necessary to provide supplies for respiratory hygiene and cough etiquette, including alcohol-based hand rub (ABHR) with 60%~95% alcohol, tissues, and no-touch receptacles for disposal, at healthcare facility entrances, waiting rooms, and patient check-ins. There is also the need to install physical barriers (e.g., glass or plastic windows) in reception areas to limit close contact between triage personnel and potentially infectious patients. Ideally, dental treatment should be provided in individual rooms whenever possible, with a spacing of at least 6 feet between the patient chairs. Further, the use of easy-to-clean floor-to-ceiling barriers will enhance the effectiveness of portable HEPA air filtration systems. Before and after all patient contact, contact with potentially infectious material, and before putting on and after removing personal protective equipment, including gloves, hand hygiene after removal is particularly important to remove any pathogens that may have been transferred to the bare hands during the removal process. ABHR with 60~95% alcohol is to be used, or hands should be washed with soap and water for at least 20 s.

The Effects of Organizational Culture for Infection Control and Self-Efficacy on Compliance with Standard Precautions of Emergency Room Nurses (응급실 간호사의 감염관리 조직문화와 자기효능감이 표준주의 지침 수행에 미치는 영향)

  • Kim, Hyunhee;Park, Hyung-Ran
    • Journal of Korean Biological Nursing Science
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    • v.21 no.1
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    • pp.46-53
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    • 2019
  • Purpose: This study was conducted to identify the effects of organizational culture for the infection control and self-efficacy on compliance with standard precautions of emergency room nurses. Methods: This cross-sectional descriptive study was conducted from 1st July to 3rd August, 2017. The participants were 200 nurses working in emergency rooms. The data was collected using structured self-report questionnaires. Results: The average scores for the organizational culture for infection control, self-efficacy and compliance with standard precautions were 5.54, 3.65, and 4.31, respectively. The organizational culture for infection control (r = .59, p< .001) and self-efficacy (r= .28, p< .001) were found to have a positive, meaningful correlation with compliance with the standard precautions. Multiple regression analysis showed that compliance with standard precautions was significantly affected by the organizational culture for infection control (${\beta}=0.55$, p< .001) and self-efficacy (${\beta}=0.13$, p= .033). Conclusion: The results for this study indicate that the organizational culture for infection control and self-efficacy were highly influential factors affecting compliance with standard precautions of emergency room nurses. Therefore, in order to improve the nurses' use of the standard precautions, it was necessary to develop and evaluate a program that considers the environmental factors and self-efficacy.

A Study on the Telelecturing/Conferencing System (원격화상강의/회의 시스템에 관한 연구)

  • Joo, Young-Ju
    • Journal of the Korean Institute of Educational Facilities
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    • v.5 no.2
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    • pp.16-29
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    • 1998
  • Bell Laboratory introduced the sound and visual system for the first time in 1927. Since then, the development of telecommunication technology made it possible for people located far away to communicate each other watching through the TV screen. Over the period different types of telelecturing systems have prospered in line with the development of telecommunication technology. Therefore, it is quite natural that telelecturing/conferending system attracts the attention of many people as a new way of educating people located in a long distance. In the industrial sector, telelecturing systems already come into wide use to save time and training and travelling expense. In this study, I examine the concept and characteristics of telelecturing/conferencing system and introduce different types telelecturing system developed in parallel with the development of communication technology. Then, I analyze how those merits of the telelecturing system can be applied to educational purpose. Finally, I propose and design ideal telelectuirng/conference facilities consisting of telelecturing rooms, bilateral movie system, seats, ceilings, color, TV screen, lighting, acoustics, humidities and temperature control, security system, projection system to maximize the educational purpose and effectiveness.

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Microbial Contamination in the Atmosphere in Seoul Metropolitan Area and its Control (서울지역에 있어서 거주공간의 미생물의 오염 및 이들에 대한 제어에 관하여)

  • 이배함;유관희;김영자;이복권;전영미;오재욱
    • Korean Journal of Microbiology
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    • v.17 no.2
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    • pp.65-71
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    • 1979
  • On studying of microbes and appearance frequency which are floating around dwelling space and life environments in Seoul area, the results are summarized as follows ; 1. 1931 strains of 29 bacteria are isolated in dwelling spaces, Among them, there are Staphylococcus aureus, S. anthracis which are pathogenic to human beings. 2. In fungi, 76 strains of 13 species are isolated. That of highest frequency is confirmed to be Aspergillus which is pathogens of Aspergillosis (one of a group of diseases of animals and human being caused by various species of Aspergillus). The places, where the number of kinds and the frequency of appearances have been observed highest, are coffee shops, lunch counters and office rooms, while factory districts are of far lower level than expected. 3. 0.1% $HgCl_2$, Leasking oil, and Telephone disinfectant were better than any other in fungicidal effect.

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Suggested Temperature Monitoring System for Distribution Transformers by Using Microcontroller Scheme

  • El-Gawad, Amal F. Abd
    • Journal of Electrical Engineering and Technology
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    • v.10 no.5
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    • pp.2099-2104
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    • 2015
  • The paper presents a monitoring system for the cooling of distribution transformers. The suggested system is controlled by a microcontroller scheme. The system is designed to control the oil temperature. It gives a solution to improve the cooling system by adding a number of fans especially for indoor transformers that are placed in badly-ventilated rooms. Also, the paper includes an alarm system with the possibility of tripping the transformer if it is necessary. The monitoring system consists of acquisition temperature sensor, and on-site unit. The hardware and software of the on-site unit are demonstrated with sufficient illustrations. Small prototype is constructed in the laboratory. Some laboratory experiments are carried out for examining the designed circuit by using Proteus Virtual System Modeling as well as for testing the prototype monitoring system. Concerning this research point, a study is carried out to evaluate the economic feasibility. The results are recorded and associated with many recommendations that may be valuable to electrical distribution (utility) companies.

A Study on System of Local TV Broadcasting Station - Focusing on the Program Production System of the Local Terrestrial TV Broadcasters - (TV프로그램 제작관련 소요공간의 배치계획에 대한 연구 - 지상파TV 지방방송사의 자체TV프로그램 제작 운영체계를 중심으로 -)

  • Hwang, Dae-Young;Lee, Sang-Ho
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2007.05a
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    • pp.114-118
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    • 2007
  • The space for production, such as studios and control rooms, is a space for TV program production, which is the main function of broadcast. A block planning for such space should be carefully designed, because it can significantly affect the efficiency of production, as well as future productivity and the development and expandability of production. From the results of comparative analysis of 7 local terrestrial broadcasters built since the late 1990s, this study will. propose an ideal block planning for the future construction of local terrestrial broadcasters. Also, the results can be used a basic data when constructing new buildings for local broadcasters.

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The Study for Evaluation of thermal comfort in office on offshore (해양플랜트 사무공간의 공조 쾌적성 평가에 관한 연구)

  • Lim, Hongseok;Kim, Panjung
    • Special Issue of the Society of Naval Architects of Korea
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    • 2017.10a
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    • pp.67-72
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    • 2017
  • This paper presents on the evaluation of thermal comfort in office on offshore. In living quarter of offshore, strict air conditioning performance is required to office on offshore and displacement ventilation is applied to office space which rooms are required to confirm the thermal environment. The computational fluid dynamics (CFD) is performed to calculate the temperature, air velocity in office and thermal comfort such as PPM & PPD is evaluated by the CFD result.

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Image Processing Technique for an Automatic Inspection of the Surface Outlook of High Speed Moving Plate. (고속 이동 판재의 자동 외관 검사를 위한 영상처리)

  • 부광석;임성현;조현춘
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.219-219
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    • 2000
  • A Plate type pipe is used for heat exchange in radiator of a vehicle. The pipe has several rooms through which water flows and heat is dissipated into outside . In the case that there are small holes, cracks or some scratches on the plate, the radiators lost their functions due to Leakage. This may result in overheating of engine in a car. Thus, we need to perform the entire inspection of the plate type pipe in advance before assembling the radiator. In manufacturing process of the plate type pipe, the productive speed is very high and that may be performed continuously. So, there is no room to perform the outlook inspection by typical image processing techniques. This paper proposes a new method to inspect the outlook surface of the plate type pipe automatically with high speed. Especially, the sequential processing technique of an algorithm which detects defects on the surfaces of the plate type pipe is proposed for line scan camera which captures line image. To evaluate the inspection performance, a series of experiments is performed.

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