• Korean Journal of Digital Imaging in Medicine
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• v.11 no.1
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• pp.21-26
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• 2009

In operation room, the use of the C-arm unit is increasing. So, the radiation dose of the person who work in operation room was even more increased than before. Thus, this study is shown the measurement of expose dose and the way for decrease of the radiation dose by using the C-arm unit. The experiment was performed with the C-arm unit and used a phantom which is similar to tissue of the human body and fluoro-glass dosimeter for dose measurement. The expose dose were measured by the tube position(over tube, under tube) of the C-arm unit, distance(50, 100$\sim$200cm), direction(I, II, III, IV), runtime(1min, 3min), wearing of the apron. The radiation dose was decreased twice and three times at under tube rather than over tube. The I direction was measured 20$\sim$30% more than the others. The biggest expose dose is 50cm from center on distance. The expose dose is decreased to far from center. In case of Wearing of the apron, the radiation dose was decreased 60$\sim$90% by the distance. But there weren't change of the radiation dose by C-arm tube position. In present, by increasing the usage of the C-arm unit, the radiation dose is inevitable. So, this study recommends us to use the under tube of the C-arm unit. Also, Wearing of the apron is required for minimum of the radiation exposure.

• Journal of Digital Convergence
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• v.20 no.1
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• pp.379-389
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• 2022

This study was aimed to identify importance and satisfaction of intensive care unit health care providers for Intensive Care Unit Clinical Nurse Expert (ICU CNE) roles. A questionnaire survey was performed with 138 intensive care unit health care providers between May 3 to 29, 2021. Data were analyzed using descriptive statistics. t-test and Importance-Performance Analysis (IPA). There were statistically significant differences in importance(t=2.33, p=.024) and satisfaction(t=5.43, p<.001) between physicians and nurses. The importance and satisfaction of intensive care unit health care providers were ranked in the order of advanced clinical practice, professional activity, coordination and cooperation, education and counseling and research. In the 'concentrate' area, it was found that 'Professional activity' and 'Education' should be improved. A strategy is needed to strengthen the expertise of ICU CNE and to enhance the competency in areas that need improvement.

• Journal of The Korean Digital Architecture Interior Association
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• v.12 no.3
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• pp.91-100
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• 2012

This paper not only reviews recent trends and characteristics of welfare facilities, but also proposes main components such as building materials and furniture applying a traditional Korean house. This paper aims to utilize interior design and construction materials of unit-care welfare facility applying the traditional Korean house. Results are as follows. 1. The rate of the private bedroom as elderly welfare facilities is 63.1%; on the contrary, the rate of the 4-person bedroom is 63.2%. The expansion of the private bedroom is an urgent need in order to improve the quality of residences. 2. According to elderly services needs and revitalization for the traditional Korean house, it is required to implementation the unit-care facilities for the elderly and interior design for the traditional Korean house. 3. The interior design for the traditional Korean house is applied to elderly living space such as a bedroom and a living room; it is not applied to care space and management space such as a nurse station and an office occupied by employees. 4. There is no problem to construct space applying the traditional Korean house using interior products currently being sold in the domestic market. 5. Standardized mass production is essential to popularize the traditional Korean house style interior.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.7B
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• pp.499-504
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• 2012

Recently, base stations composed of digital unit (DU) and radio unit (RU) have been widely used in 4G mobile networks. To connect DU and RU, CPRI (common public radio interface) is usually used as the interface standard. This CPRI link is considered as one of the application markets for WDM-PON. In this paper, we analyzed the required specification of WDM-PON for the CPRI link of the 4G LTE-Advanced base station composed of DU and RU. This analysis is important to set a target goal of the development of WDM-PON system for 4G mobile networks.

• Journal of The Korean Digital Architecture Interior Association
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• v.12 no.2
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• pp.67-76
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• 2012

BIM and its quantity take-off widely apply to the construction projects and LCCO2 Assessment using the BIM's quantity take-off function can be tried recently. Because BIM modeling programs such as Revit and ArchiCAD do not provide adequate library for LCCO2 Assessment, quantity take-off data should be conversed and applied to Carbon Emission Coefficient using Excel program or manual work. Therefore, the purpose of this research is 1) to propose the Unit Conversion Systems for Carbon Emission Coefficient, 2) to provide basic library sets for BIM based LCCO2 Assessment method, and 3) to apply 11 material library sets on a apartment unit plan modeling to pursue the CO2 emission evaluation of the material production in the process of LCCO2 Assessment. Research results showed CO2 emission amount of 458.64kgCO2/m2 from the apartment unit plan modeling.

• Journal of Convergence for Information Technology
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• v.9 no.1
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• pp.136-141
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• 2019

In this paper, we describe the design of a small size data acquisition system with STM32 processor based on Cortex-M4. The system is used for the sensor devices to collect raw data on production lines at factory and send them to the server computer in real time. Also the system is designed to easily acquisite various kinds of data collected from various sensors with the digital signal input unit, the analog signal input unit, the digital signal output unit and the analog signal output unit This small data acquisition system will contribute to the improvement of the quality of precision products in the industrial field by collecting various data in real time and transmitting data at high speed.

• Proceedings of the IEEK Conference
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• 2001.06b
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• pp.97-100
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• 2001

A 3-way VLIW multimedia signal processor capable of efficient repeated operations as well as both load/store and type transformations for various data types is presented. It is composed of a 32-bit execution unit that can execute two instructions in parallel, an independent load/store unit and a control unit. The processor is implemented with 0.6${\mu}{\textrm}{m}$ gate array and the results are discussed.

• Transactions of the Korean Society of Automotive Engineers
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• v.11 no.6
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• pp.118-126
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• 2003

Digital Manufacturing is a technology facilitating effective developments and agile productions of the product via digital computer models representing physical and logical schema and the behavior of the real manufacturing systems including manufacturing resources, environments and products. For the successful application of this technology, a digital factory as a well-designed and an integrated environment is essential. In this paper, we constructed the sophisticated digital factory of a Korean automotive company's body shop, and conducted precise simulations of unit cell, lines and the whole factory for the collision check, the production flow analysis and the off-line programming. We expect that this digital factory of the body shop helps us achieve great savings in time and cost for many manufacturing preparation activities of the new car development.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.8
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• pp.915-919
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• 2014

Since smart phones are widely used globally, the demand for high-speed mobile communications are increasing. To accommodate the increased communication demand, the next-generation mobile communication services such as LTE-Advanced are deployed. In the LTE-Advanced base stations, the base station schemes of Digital Unit (DU) and Radio Unit (RU) are widely used. Here, the link between DU and RU is called fronthaul link. In the current fronthaul link, a digital optical communication interface is used, which is called Common Public Radio Interface (CPRI). However, the CPRI link cannot support the increased mobile traffic efficiently. Therefore, in this paper, we investigate an alternative technology based on the Radio over Fiber (RoF) to accommodate the increased mobile traffic economically.

• Journal of Biomedical Engineering Research
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• v.21 no.3 s.61
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• pp.255-260
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• 2000

This paper presents a radio-telemetry patient monitor. which is used for intensive cal?e units. emergency and surgical operation rooms to monitor continuously patients' vital signs. The radio-telemetry patient monitor consists of a vital sign acquisition unit. wireless data transmission units and a vital sign-monitoring unit. The vital sign acquisition unit amplifies biological signals, performs analog signal to serial digital data conversion using the one chip micro-controller. The converted digital data is modulated FSK in UHF band using low output power and transmitted to a remote site in door. In comparison with analog modulation. FSK has major advantages to improve performance with respect to noise resistance with fower error and the potential ability to process and Improve quality of the received data. The vital sign-monitoring unit consists of the receiver to demodulate the modulated digital data, the LCD monitor to display vital signs continuously and the thermal head printer to record a signal.