• Title/Summary/Keyword: Equipments

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A Study on the Test of Efficiency of the Diagnostic X-ray Equipment according to Their Rectifications (진단용 X선장치의 성능 실태 조사연구)

  • Seon, Jong-Ryul
    • Journal of radiological science and technology
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    • v.20 no.2
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    • pp.44-48
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    • 1997
  • For the efficient management of the diagnostic x-ray equipment, a nation-wide inspection of hospitals was performed by an inspection institute in Taejon in the first half of 1997. Among those hospitals inspected, 28 equipments(machines) which were over 500 mA were randomly selected according to their characteristics : 7 condenser type x-ray equipments, 7 three control phase of full wave rectification of type remote control x-ray equipments, 7 single phase of full wave rectification type for general radiography equipments, and 7 single phase of full wave rectification type of R/F equipments. We obtained the following results by conducting the experiment based on the efficiency of the equipments mentioned above. 1) When the equipments are analyzed, 2 out of 7 single phase of full wave rectification type of general radiography equipments(28.6%), 3 out of 7 single phase of full wave rectification type of R/F equipments(42.9%), 5 out of 7 three phase of full wave rectification type remote of control x-ray equipments(71.4%), and 4 out of 7 condenser type of x-ray equipments(57.1%) showed suitability. It proves the superiority of the three phase of full wave rectification type of remote control x-ray equipments. 2) From the overall analysis, only about 50% of the equipments(suitability of 14 out of 28) maintain the efficient management. Therefore, maintenance management of equipments is more necessary. If the efficiency of the x-ray equipment is uniformly maintained and managed to prevent the breakdown(trouble) beforehand especially through the continuous inspection of tube voltage, tube current, exposure time, and collimator, the financial loss and exposure dose to the patient, as well as the workers engaged in radiation, can be reduced for better medical service.

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The Implementation of Communication Protocol for Semiconductor Equipments using Directed Diffusion (직접 확산 방식을 이용한 반도체 장비 통신 프로토콜 구현)

  • Kim, Doo Yong;Cho, Hyun Chan
    • Journal of the Semiconductor & Display Technology
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    • v.12 no.2
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    • pp.39-43
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    • 2013
  • The semiconductor equipments generate necessary data through communication networks for the effective manufacturing processes and automation of semiconductor equipments. For transferring data between semiconductor equipments and sending data to monitor equipments, several standards for communication protocols have been proposed. Communication networks in semiconductor manufacturing systems will transmit a lot of data traffic, which can be vulnerable in data delay and network failure. Therefore, it is required that data traffic need to be distributed. To accomplish this objective, we recommend the use of a redundant and valuable communication path which is constructed by a wireless sensor network. In this paper, the directed diffusion method for wireless sensor networking is suggested for networking semiconductor equipments. It is shown that how the directed diffusion is employed to connect semiconductor equipments. Also, we show how to implement the SECS of semiconductor equipments communication protocols based on the directed diffusion.

A Study on the Testing System for Network Equipments (네트워크장비 시험체계에 관한 연구)

  • 이준원
    • The Journal of the Korea Contents Association
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    • v.4 no.2
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    • pp.61-67
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    • 2004
  • This paper describes the importance of the network equipment markets and the necessity of the testing and the verification for the network equipments and the effective system for network equipment test. With the rapid internet service development, the demands of the network equipments(for example, router, switching equipment etc.) are expanded. The network equipments request the high love technologies, so the foreign network equipments are prevailed in the domestic market. But the development of the network equipments in korea is in the beginning stage. To deploy the network equipments into the real network the network equipments should be tested and verified by the certified test labs. To get the verification from the foreign test lab, it takes a lot of expenses and times. For the competitiveness of our products in the international markets, the technique of the test and verification on the network equipments should be level-up. This paper investigates the network equipments market condition and the network equipments test condition in Korea. For the competitiveness of our commodities in the international markets, this paper proposes the testing strategy for network equipments.

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An Assess of Exposed Building Equipments and Improve the Designs (노출된 건축설비의 디자인 평가와 개선방향)

  • Lim, Myung-Gu
    • Journal of The Korean Digital Architecture Interior Association
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    • v.3 no.1
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    • pp.23-28
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    • 2003
  • In spite of The exterior design of buildings has a remarkably significant value in terms of public aspect some exposed architectural equipments spoil the appearance of building. The design elements of exposed architectural equipments were partially changed and assessed in the semantic differential method. Thus the aesthetically favorable impression and values of public interest were able to be increased. The reasons why those hideous exposed architectural equipments were constructed, seemed to be as follows; the builders' selfishness, the citizens' ignorance and the immature social institutions that cannot restrict undesirable design efforts. Building equipments located outside are not classified as major elements in building regulations and thus can be installed and altered without any limitations even though they have great effects on the shape and colors of a building. So we have more interest in exposed architectural equipments and more deliberation of exterior design of a building.

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Distribution Patterns of Research Equipments in Korea (한국의 연구장비 현황과 구축패턴)

  • Seol, Seong-Su;Kim, In-Ho
    • Journal of Korea Technology Innovation Society
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    • v.9 no.3
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    • pp.471-495
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    • 2006
  • This paper reviews the distribution patterns of research equipments in Korea. We start, however, discussion with the introduction to research equipments, theoretical issues and rationale for government intervention. Nation-wide distribution of research equipments is shown by region, type of institution, university, and major equipment. Old patterns are derived from the history of equipping science, and three new current patterns are introduced. Based on this discussion, we recommend policies for research equipments.

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A Feasibility Study of Safety Cetification for Finished Product of Febricated Temporary (조립식 가설기자재의 완성품에 대한 안전인증 타당성 연구)

  • Lee, Jeong-Seok;Choe, Jin-U
    • Proceedings of the Safety Management and Science Conference
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    • pp.39-48
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    • 2013
  • Recently, the using of prefabricated temporary equipments is increasing in the industrial field because it can reduce the installation and dismantling period. The various types of prefabricated temporary equipments are manufacturing with various materials in domestic and overseas countries. However, those equipments should win the safety certificate according to the "Governmental Notification about Safety Certification" which regulate the member-based safety certification. It tends to cause over performance of temporary equipments because it couldn't consider structural benefit of the prefabricated products. As the result of this study, it is concluded that the establishment of new safety certification standard for the prefabricated temporary equipments is resonable and the movable scaffold is appropriate for those prefabricated temporary equipment. The movable scaffolds are using as single structure and cannot be expands horizontally. Other types of temporary equipments are using as complex structure which can freely expand horizontally according to the main structure. From the results of the study, the standard of vertical compression performance of prefabricated movable scaffolds should be more than double the performance of single main frame. Other test items of safety certification standard should be fixed when the Notification is amended. The prefabricated temporary equipments which are adopted for the safety standard on assembled structure should be used, moved and kept in assembled state and not separated discretionally. The establishment of new standard for the assembled structure based on this study leads to the development of various types of temporary equipments using structural efficiency of prefabricated structure.

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Factors Influencing the Effectiveness of Materials Handling Equipments Supplied in Agriculture

  • Park, Sung-Ha
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.4
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    • pp.503-507
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    • 2011
  • Objective: This paper presents the factors influencing the effectiveness of materials handling equipments in agriculture. Background: Agriculture is one of the job categories where work-related musculoskeletal disorders(MSDs) are the most common. Statistics shows that majority of farm workers is exposed to repetitive and forceful body movements, lifting, lowering, pushing, pulling, or carrying heavy materials. In such a working environment, materials handling equipments are required and introduced to assist in the prevention of MSDs and other farm injuries. Method: Examples of materials handling equipments are rail carts, portable lifts, and bale handlers. Contributing factors influencing the effectiveness of materials handling equipments supplied in agriculture were identified based on the lessons learned from previous government-funded ergonomic projects. Results: Contributing factors identified include: (1) forward-looking attitude for the standardization of farming, its environments, and handling equipments, (2) participation of farm members in the process and evaluation of project, (3) leadership of project manager, (4) reinforcement of safety education and training, and (5) project selection and priority of handling equipment. Conclusion: Government-funded research planners, farmers, ergonomists, and farm machine experts are recommended to consider the factors identified when implementing materials handling equipments in agriculture. Application: Actual or potential application of this research includes recommendation for the effective implementation of material materials handling equipments in agricultural sectors.

A Study on the Analysis of Errors occurred by Different Type of Automatic Bacteria Counting Equipments used in Counting Bacterial Number of Raw Milk (우유의 세균 자동측정장치의 오차범위 조사 및 오차발생 요인 분석에 관한 연구)

  • 정충일;엄양섭;김광태;강국희;이수원
    • Food Science of Animal Resources
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    • v.21 no.2
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    • pp.163-168
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    • 2001
  • This study was conducted to analyze the errors occurred between standard plate count(SPC) and Bactometer, Malthus, Bactoscan and to investigate correlation coefficient(r) between SPC and each equipments for the purpose of making new calibration curve. Correlation coefficients of three different types of equipments to SPC value were 0.71, 0.81, 0.84 respectively(n=287) and that of three types of equipments were 0.71∼0.82 relatively low. In raw milk, correlation coefficients of three types of equipments of SPC were in the range of 0.67∼0.73 below 3.0${\times}10^4$(CUF/ml) of bacterial number, and those between the three types of equipments were 0.68∼0.72. Between 3.0${\times}10^4$∼5.0${\times}10^5$(CFU/ml) of bacterial number, correlation coefficients of the three different types of equipments were 0.71∼0.81. and those between the three different types of equipments were 0.64∼0.77. Over 5.0${\times}10^5$(CFU/ml), correlation coefficient of the three types equipments were 0.66∼0.83 and those between them were 0.70∼0.85 respectively. The error of the three different types equipments to SPC value was significantly high, 37∼53% of them was under 50% of error range, and in case of raw milk less than 3.0${\times}10^4$ of bacterial number, 44∼67% of them showed over 100% of error.

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A Study on the Effects of Various Portable Wireless Communication Equipments on the Medical Equipments (각종 휴대용 무선 통신기기가 의료기기에 미치는 영향에 관한 연구)

  • 배한길;김종헌
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.10 no.3
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    • pp.392-400
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    • 1999
  • In this paper, the electromagnetic immunity of electronic medical equipments was tested by employing a standard test method for medical equipments. In addition, the electromagnetic interference to the medical equipments caused by four different types of mobile phones such as portable transceiver, analog, digital, and PCS cellular phones, have been studied. In this study, 16 medical equipments of 11 different types were investigated. There are a patient monitor, an infusion pump, a neonatal incubator and so on. In the case of the EMS test, the interferences were detected for seven medical equipments of four different types(53.3%) such as the patient monitor. For the two portable transceivers, 12 medical equipments of eight different models (75%) were affected. All medical equipments were satisfied with electromagnetic immunity by analog, digital and PCS cellular phones. The experiment results show that the malfunction of the electronic medical equipments is dependent on the frequency range and the electric field strength of the mobile phones.

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A Study on Prevention of Disasters through TPM for Loading and Unloading Equipments of Incheon Port (인천항(仁川港) 항만하역장비(港灣荷役裝備)에 대한 TPM 적용으로 재해예방에 관한 연구)

  • Park Sang-Ki;Lee Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.8 no.1
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    • pp.1-16
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    • 2006
  • We applied the TPM to loading and unloading equipments of Incheon port and compared with the current maintenance of Incheon port's equipments. Also we analyzed the death disaster causes of equipments and work tools and suggested TPM techniques as a plan of disaster prevention. Using TPM to the loading and unloading equipments we expect to obtain the breakdown zero, defective zero, and disaster zero. And then it should raise the productivity of harbor loading and unloading equipments.