• The Journal of the Acoustical Society of Korea
• /
• v.19 no.1E
• /
• pp.13-21
• /
• 2000

In this paper, we present the description and results of experimental study of the sound power measurements based on International Standards ISO 3741 and 3745. The sound power emitted by a calibrated reference sound source was measured in a reverberation room and a free field over a reflecting plane, using the precision methods of International Standards ISO 3741 direct method and ISO 3745, respectively. The sound power measurements carried out in this study give accurate estimation and also show that both methods for determining the sound power levels of a sound source in a reverberation room and a free field over a reflecting plane, according to the ISO 3741 and 3745, respectively, have proved equally good.

• Proceedings of the KIEE Conference
• /
• 2007.04a
• /
• pp.70-72
• /
• 2007

In this study, electromagnetic fields emitted from the various environment in the hospital were measured. Measurement spot was patients' head. To monitor how much magnetic fields are emitting from operation room, monitoring device was attached to 19 anesthesiologist and monitoring lasted 8 hours. We also took a measurement from various medical devices. Devices include ESWL, PET, MRI, CT, Gamma knife, X-ray, Angiogram, Echocardiogram, Upper GI and Linear Accelerator. Electromagnetic fields were measured from 10 spots from each of 5 patient waiting room. As a results, there were no places showing risk of high exposure. All the measurement values were below the reference levels for general public exposure to time varying electric and magnetic fields which is issued by ICNIRP.

• 한국전산유체공학회:학술대회논문집
• /
• 2008.03b
• /
• pp.526-529
• /
• 2008

Air Conditioner has become a popular comfort providing device since two decades, whether in an office or home especially for warm and wet climate countries. The RAC (Room Air Conditioner) is widely used in various working spaces and residences. It composed of heat exchager, cross-flow fan, stabilizer, rearguider and blade of diffuser region, etc. In this study, numerical analyses based on the prediction of transient phenomena were carried out to investigate the flow characteristics in the RAC, including the impeller, the rearguider, the stabilizer and the blade of the diffuser region. Using a commercial code, FLUENT, the velocity, pressure and streamlines were obtained with unsteady, turbulent flow and no-slip condition. The angular velocities of impeller are located in the 900 rpm. Turbulent closure was achieved using a standard k-${\varepsilon}$ model. A moving reference frame (MRF) approach was adopted to simulate the flow field generated by impeller in the RAC. Results were graphically depicted with various geometrical configurations and operating conditions.

• Journal of Powder Materials
• /
• v.13 no.6 s.59
• /
• pp.455-461
• /
• 2006

High temperature dielectric constants of the various ceramic materials have been measured using cavity perturbation method. The measurements were applied to refractory, traditional and fine ceramic powder compacts from room temperature to $1200^{\circ}C$. Calibration constant in the equation suggested by Hutcheon et al., was determined from the dielectric constants of reference specimen (teflon and alumina) at room temperature. From these results, informations on the refectory materials were obtained for the microwave kiln design and understanding of the microwave heating effects of ceramics have been improved.

• Culinary science and hospitality research
• /
• v.4
• /
• pp.295-315
• /
• 1998

This paper attempts to examine the degree of chef's satisfaction on food purchasing in 5-star hotel in Seoul. Nowadays, hotel industry in Korea is becoming more and more competitive and the hotel products higher education. Among a range of divisions in deluxe hotel in Seoul, in particular, a F&B division has been more profitable than the others. It is widely accepted that the proportion of revenue obtained from F&B sales is higher than that of revenue from room sales. However, under the IMF intervention, hotels in Korea trend to depend on room sales rather than F&B sales in terms of profit. In such a environment, it is essential that F&B division should carefully seek for an appropriate purchasing procedure which will affect an organizational structure and allow the company to fulfill its goals. Moreover, it is timely their performance and quality of services through ideal food purchasing procedure. In this paper, the author uses a survey technique distributed to approximately 200 chefs who work at 5-stars hotel in Seoul. The author expects that this paper will contribute to the researchers or practitioners who might need a reference on the food purchasing system.

• Journal of the Korean housing association
• /
• v.15 no.1
• /
• pp.25-32
• /
• 2004

The purpose of this study is to understand the indoor thermal environment in the earth brick wall building what is called a ecological Architecture. To investigate thermal performances of the earth brick walls, it measured indoor and outdoor air temperature, relative humidity, globe temperature and PMV in reference house. The result of this study were summarized as the followings; 1) When the outdoor average air temperature was $21.8^{\circ}$, livingroom was $24.9^{\circ}$, kitchen was $25.1^{\circ}$ and 2nd floor room was $25.6^{\circ}$ at 150 cm height from the floor. 2) Although the average outdoor relative humidity was 78%, the livingroom was 67.5%. 3) As the air temperature difference between at the top and bottom was $0.6^{\circ}$ in living room, this value was below 1 % of PPD by ASHRAE Handbook. 4) Predicted Mean Vote(PMV) by ISO-7730 was +0.41.

• Korean Institute of Interior Design Journal
• /
• no.3
• /
• pp.85-90
• /
• 1994

The purpose of this study was to present design direction of a unit plan in elderly housing. In order to perform the above purpose, this study was organized into two sections. First, literature review to understand the relationship between late adulthood development and housing environment, unit plan of elderly housing and design needs. Second, questionnaire and field survey research to seek a design direction of unit plan. Statistics were frequency, percentage, mean and crosstabulated analysis. The major findings were summerized as follows ; 1) The size of ideal single room was 20.4$m^2$-28.5$m^2$, and the minimum size for the couple was 28.5$m^2$. 2) The entrance of each room must not be faced each other, in case of the corridor type building like YooDang village. 3) Spare heater which can be turned on anytime was requested in bathroom especially for wintertime or whenever elderly need more heat. 4) The minimum size of closet was 1.5m per single room and the ideal size of it is over 1.8m. 5) The platform ondol type bed was ideal type bed was ideal for Korean elderly.

• KIEAE Journal
• /
• v.17 no.1
• /
• pp.55-61
• /
• 2017

Purpose : As the necessity of reinforcement of infections management in medical facilities after MERS increased, Ministry of Health and Welfare promulgated the enforcement regulations of medical law on February 3, 2017. Its main objective is to improve patients' safety and medical-care quality through the establishment of isolation facilities from infectious diseases and the set-up of standards for In-patient and ICU facilities. The purpose of this study is necessarily to propose a standardized spatial composition model for ward modules by analyzing changing environments of in-patient facilities according to the strengthened medical law. Method: Theoretical studies will be undergone of Evidence-based Designs to improve patients' safety, medical quality, and domestic/overseas in-patient room guidelines. With reference to the status of 24 general hospitals over 500 beds, the spatial compositions of the in-patient rooms and the types of multi/single bed room modules will be analyzed. The directions of future in-patient room module changes through the study of the minimum ward module types and various ward types will be presented. Result: This paper will hopefully provide guidelines for hospitalization rooms that can be applied to the revised rules of medical law enforcement and provide a basis for a comprehensive study of patients' safety and efficient infection control as well.

• Journal of Korean Library and Information Science Society
• /
• v.23
• /
• pp.109-145
• /
• 1995

This study is to find out general problems a n.0, ppeared in the management and utilization of these and dissertation and to suggest some recommendations, through the survey and analysis on the Korean university libraries. Questionnaires were sent to 109 university libraries which offer master's and doctoral degrees, during the period between March 7 and March 27, 1995. Responded questionnaires of 91 libraries (about 83%) were processed using SAS. The results of this survey can be summarized as follows: 1. Most of Korean university libraries have the collections of theses and dissertations ranging from less than 10,000 volumes (27 libraries ; 32.1%) ; 10,000 to 30,000 volumes (20 libraries ; 25.0%) ; to more than 80,000 volumes (16 libraries ; 19.0%). The largest collection was around 200,000 volumes. 2. In the management of them, 35 libraries (38.5%) were active in collecting them, but 56 libraries (61.5%) were not active, mainly for the shortage of manpower and the space problems. In 62.6% of libraries, they are arranged with the books. And 51.3% of libraries process them in less than one month. 46 libraries (52.9%) computerize their system, and among them 40 libraries (87%) establish their own databases. 3. The collections of theses and dissertations are called by various name, including periodical room, theses room, reference reading room etc. reaching to 15 kinds. 71 libraries (78.0%) adopt open system, and 17 libraries closed system ; and 2 libraries (3.2%) partial open system. 62 libraries (68.1%) arrange them in the order of call number, while 20 libraries (31.9%) by other criteria.

• Journal of Korean Clinical Nursing Research
• /
• v.14 no.1
• /
• pp.71-84
• /
• 2008

Purpose: The purpose of this study was to develop a performance tool to evaluate operating room nurses. Method: In the first stage, 59 preliminary items were selected after two focus group meetings were carried out using as background a reference review. At this stage 59 items were developed. Next, the selected preliminary items were modified by an expert group of nurses with over 10 years experience, nurses holding doctoral degrees and professors in nursing. In the third and fourth stage, these items were analyzed by the expert group to determine validity and tested by hospital nurses with over 10 years experience to determine reliability Results: For the final tool, the 59 items, 47 items for the performance evaluation dimension and 12 items for the competence evaluation dimension were found to be valid and reliable. Cronbach's $\alpha$ was .9622, a promising alpha value for the total instrument. Conclusion: This tool is an efficient performance evaluation instrument providing meaningful feedback for operating room nurses.