• 제목/요약/키워드: National standard

검색결과 12,543건 처리시간 0.039초

국내 공작기계 재제조 기술개발 현황 및 표준공정 개선방안 연구 (A Study on Status of Domestic Machine Tools Remanufacturing Technology Development and Improvement of Standard Process)

  • 신성우;설상석;노영화;김현수;박민성;정원지
    • 한국산업융합학회 논문집
    • /
    • 제27권2_2호
    • /
    • pp.415-424
    • /
    • 2024
  • This study analyzes trends and characteristics of the machine tool remanufacturing industry and proposes a standard process that considers environmental impact assessment during the remanufacturing process. First, trends in remanufacturing and environmental regulations are reviewed. And the current status of the machine tool remanufacturing industry and cases of national R&D projects related to machine tools are analyzed. Machine tool remanufacturing has a high resource saving effect, and remanufacturing is carried out as a finished product rather than as a part. And the scope of remanufacturing work is very wide due to the performance improvement of the machine and the addition of features. In order for the machine tool remanufacturing industry to be competitive, it is necessary to create products with high added value. In addition, in order to respond to international environmental regulations, it is necessary to secure related data by conducting an environmental impact assessment together during remanufacturing.

지리교육내용의 표준설정 방법 - 지적영역을 중심으로 - (A Study on Content Standard of Geographical Education)

  • 조성욱
    • 대한지리학회지
    • /
    • 제37권3호
    • /
    • pp.276-291
    • /
    • 2002
  • 현행 교육과정의 지리교육내용은 포괄적이고 추상적으로 제시되고 있다. 또한 전체 교육의 일부분으로 설정되기 때문에, 지리교육 자체의 교육 내용 체계화를 이루기 어렵다. 본 연구에서는 현행 교육과정을 보완하고 지리교육 내용을 체계화하는 방법으로, 지리학에 기반을 둔 지리교육 내용의 표준 설정 방법을 제안한다. 지리교육의 표준 설정 방안으로 대주제, 기본 주제, 주요 표준, 표준, 상세 표준을 제시하였다. 대주제는 지리교육 전반을 통찰하는 대개념으로서 '인간과 환경의 상호작용 이해', '장소 또는 지역에 대한 이해', '인간과 장소의 상호작용 이해'의 3개를 선정하였다. 기본 주제는 '지리적 기능', '자연 환경' '인문 환경', '장소 및 지역', '인간과 장소의 상호작용'의 5개를 선정하였다. 표준은 구체적이고 측정 가능한 지리교육내용을 제시하는 단계로서 '주요 표준'표준', '상세 표준'의 3단계로 상세화했다.

비소세포폐암에 사용되는 항암화학요법의 요양급여기준 적절성 평가 (Assessment of Appropriateness of Standard for Insurance Coverage on Chemotherapy used in Non-small Cell Lung Cancer (NSCLC))

  • 김정연;박은지;배민경;윤정현
    • 한국임상약학회지
    • /
    • 제21권3호
    • /
    • pp.193-207
    • /
    • 2011
  • Purpose: The purpose of this study is to assess appropriateness of current standard for insurance coverage by Health Insurance Review & Assessment Service (HIRA) on chemotherapy used in the treatment of advanced non-small cell lung cancer (NSCLC), by reviewing a variety of clinical evidences, and thereby, if needed, to propose an updated evidence-based recommendations. Methods: We collected data from HIRA regarding on the insurance standard which includes the scope and conditions for coverage on systemic chemotherapy of NSCLC. We performed a search for clinical databases and examined the most current clinical evidence from clinical literature including various clinical practice guidelines. Based on the collected data the appropriateness of HIRA standard for insurance coverage of chemotherapy of NSCLC was assessed. Results: Collected data demonstrated that HIRA standard did not reflect the most current clinical practice and evidence. Some were inappropriately listed in HIRA formulary and accepted as a chemotherapy being covered by insurance, despite the lack of evidences of clinical efficacy or superiority over other chemotherapeutic agents or regimens. In addition, there seems to be a need for a modification on the standard for insurance coverage of certain newer chemotherapeutic agents based on the current accumulated data showing their clinical efficacy and benefits in the selected group of NSCLC patients. Therefore, we concluded that current HIRA standard for insurance coverage on chemotherapy of NSCLC needs to be revised and we proposed an updated recommendation based on these latest clinical evidences. Conclusion: The standard for insurance coverage of chemotherapy should be continually examined its appropriateness based on the most recent clinical evidences in a timely manner so as to provide the most effective and safe therapy to cancer patients.

TOC 기법을 적용한 ERP 표준시간 검증 및 MES 공정실적개선 (Verification of ERP Standard Time Using TOC Technique and Improvement of MES Routing Point)

  • 김성민;안재경
    • 산업경영시스템학회지
    • /
    • 제41권4호
    • /
    • pp.22-33
    • /
    • 2018
  • Recently domestic manufacturing companies have been experiencing worsening profitability and stunted growth due to the long-term economic recession and the rapid rise of developing countries such as China and Southeast Asia. These difficulties force many companies to concentrate their core competencies on new value creation and innovation in order to gain momentum for new growth. Enterprise Resource Planning (ERP) has been considered as one of viable solutions. Among the various modules in ERP, shop floor control function in the production management module is rather limited. In order to overcome this problem, Manufacturing Execution System (MES) has been used as a subsystem which has a strong information gathering power and flexibility. Both systems interact closely with each other. In particular, ERP requires fast, accurate shop floor information at MES. This paper describes how to synchronize relevant information between ERP and MES with theory of constraints (TOC). The processing time information transmitted from the MES workplace is received at the ERP workplace. In the process, the received processing time is causing information distortion in ERP, when the information gathering standard of MES is different from the ERP information interpretation standard. The Drum-Buffer-Rope theory of TOC was applied to resolve this problem, therefore, information synchronization between both systems was made. As a precondition, the standard time of the upper ERP system was rearranged according to the capacity constraints resource. As a result, standard time restructuring has affected changes in labor costs. Standard labor costs have come close to actual ones, and information synchronization of MES transmission data has improved the reliability of standard product costs, such that it enabled various company-wide restructuring actions to be much more effective.

온실의 기간난방부하 산정을 위한 난방적산온도 비교분석 (Comparative Analysis of Accumulated Temperature for Seasonal Heating Load Calculation in Greenhouses)

  • 남상운;신현호;서동욱
    • 생물환경조절학회지
    • /
    • 제23권3호
    • /
    • pp.192-198
    • /
    • 2014
  • To establish the design criteria for seasonal heating load calculation in greenhouses, standard weather data are required. However, they are being provided only at seven regions in Korea. So, instead of using standard weather data, in order to find the method to build design weather data for seasonal heating load calculation, heating degree-hour and heating degree-day were analyzed and compared by methods of fundamental equation, Mihara's equation and modified Mihara's equation using normal and thirty years from 1981 to 2010 hourly weather data provided by KMA and standard weather data provided by KSES. Average heating degree-hours calculated by fundamental equation using thirty years hourly weather data showed a good agreement with them using standard weather data. The 24 times of heating degree-day showed relatively big differences with heating degree-hour at the low setting temperature. Therefore, the heating degree-hour was considered more appropriate method to estimate the seasonal heating load. And to conclude, in regions which are not available standard weather data, we suggest that design weather data should be analyzed using thirty years hourly weather data. Average of heating degree-hours derived from every year hourly weather data during the whole period can be established as environmental design standards, and also minimum and maximum of them can be used as reference data for energy estimation.

무연 솔더바에 대한 신뢰성 평가기준에 관한 연구 (Reliability Appraisal Standard for Lead-free Solder Bar)

  • 최재경;박재현;박화순;안용식
    • 마이크로전자및패키징학회지
    • /
    • 제14권2호
    • /
    • pp.23-33
    • /
    • 2007
  • RoHS, WEEE 등에서의 각종 환경문제에 대한 제약으로 Pb의 사용에 대한 규제가 점차 증가 하고 있다. 따라서 무연 솔더에 대한 관심이 증폭되고 있으며, 마이크로 전자공학 산업에서 무연 솔더를 사용하기 위해서는 여러 가지 새로운 신뢰성 평가기준을 요구한다. 예를 들어 높은 온도공정을 만족하는 패키지, 새로운 솔더가 야기하는 복잡한 기계적 고장, 그리고 제품 수명을 최대한 유지시켜 줄 수 있는 무연 솔더 소재의 선택을 포함한다. 본 연구에서는 국내산 솔더바 소재를 사용하여 접합부의 기계적 특성 및 젖음성, 퍼짐성 등의 품질평가 방법을 해외규격과 비교하여 시험하고 새로운 평가기준을 찾고자 하였다. 젖음성 및 퍼짐성 시험 결과 Sn-0.7Cu 무연 솔더 소재는 평가기준을 충분히 만족하였다. 또한 이 소재를 사용한 솔더 접합부의 전단시험 결과, 열충격 및 고온방치 시험 후에도 솔더링 상태의 초기강도와 비교하여 접합부의 전단강도가 크게 저하하지 않은 상태에서 기준치를 크게 상회하였다.

  • PDF

학원교실의 냉방시 실내공기질 실태와 영향요인 분석 (Analysis on Influencing factors and Actual State of Indoor Air Quality by Cooling in Private Institute Classrooms)

  • 최윤정;이혜진;이지연
    • 한국생활과학회지
    • /
    • 제17권5호
    • /
    • pp.1001-1013
    • /
    • 2008
  • The purpose of this study were to make clear the actual state of indoor air quality by cooling in private institute classrooms and to analyze influencing factors on indoor air quality. The measurements of physical elements and observations of architectural characteristics and living conditions were carried out in each 1 classroom of 5 private institutes. Measuring elements were indoor temperature, relative humidity, $PM_{10}$, HCHO, CO, and $CO_2$ concentration. As results, the averages of indoor temperature each classroom were $21.7\sim28.1^{\circ}C$. 3 classrooms were lower than the Maintenance standard($26\sim28^{\circ}C$) of School Health Law. The means of relative humidity were 48$\sim$63%, all classrooms were ranged within the standard(30$\sim$80%). The means of $PM_{10}$ concentration were 2.1 $\sim$ 17 $\mu g/m^3$, all classrooms were kept within the standard(100 $\mu g/m^3$). The means of HCHO concentration were 0.02$\sim$0.16 ppm, 2 classrooms were exceed the standard(0.1 ppm). The means of CO concentration were 1.4$\sim$3.6 ppm, all classrooms were kept within the standard(10ppm). The means of $CO_2$ concentration were 1,593$\sim$3,819 ppm, all classrooms were exceed the standard(1,000ppm). The results of analysis on influencing factors of the physical elements are as follow; the air conditioner set of temperature, personal necessities like hair spray, teacher's smoking in corridor, windows and doors opening time, the number of students, and volume of classroom.

교사환경기준에 관한 연구 (A Study on Environmental Standards of School Building)

  • 홍석표;박영수
    • 한국학교ㆍ지역보건교육학회지
    • /
    • 제1권1호
    • /
    • pp.11-43
    • /
    • 2000
  • The purpose of this study was, through analyzing the previous researches, to grasp the present status of environment of school building(ESB), research the sundry records of each element and, through comparative analysis of the standard of ESB in Korea, the United States, and Japan, select the normative standard of ESB, to clarify the point at issue presented in Regulation of Construction & facility Management for Elementary and and Secondary School in Korea, and to suggest an alternative preliminary standard of ESB. To carry out a research for this purpose, these were required: 1. to investigate the existing present status of ESB, 2. to make a comparative analysis of the standard of ESB in each country, 3. to suggest the normative standard of preliminary standard of ESB, 4. to analyze the controversial points of the standard of ESB in Korea, 5. to suggest an alternative preliminary standard of ESB. The conclusions were as follows: 1. Putting, through analyzing the previous researches, the existing present status of ESB together, it seemed that lighting environment, indoor air environment and noise environment were all in poor conditions. 2. In the result of a comparative analysis of the standard of ESB in Korea, Japan and the United States, in Korea the factors of each lighting and indoor air environment were not presented properly, in Japan, in lighting environment aspect, the standard on natural lighting and the factors on brightness were not presented., and in the USA the essential factors of each environment were throughly presented. In the comparison of the standards on each factor, Korea showed that the standard level presented was less properly prescribed than those of the USA and Japan but it also showed that the standard levels prescribed in the USA and in Japan were mostly similar to the standard levels in records investigated. 3. With the result of the normative standard selection on School Builiding environment factor of prescribed in this study, the controversial points of the standard of ESB in Korea were analyzed and the result was utilized to suggest new preliminary standard of ESB. 4. As the result of the analysis of the controversial points of the standard of ESB in Korea, it was found that the standard of ESB in Korea should be established on a basis of School Health Act and be concretely presented in School Health Regulation and School Health Rule. The factors of each environment was improperly presented in the existing standard of ESB in Korea. Moreover the standard of them was inferior to that of the records investigated and those of in the USA and in Japan and it also showed that the standard of it in Korea was improper to maintain Comfortable Learning Environment. 5. A suggested preliminary standard of ESB acquired through above study as follows: 1) In this study a new kind of preliminary standard of ESB is divided into lighting environment, indoor air environment, noise environment, odor environment and for above classification, reasonable factor and standard should be established and the controling way on each standard and countermeasures against it should be considered. 2) In lighting environment, the factors of natural lighting are divided into daylight rate, brightness, glare. In the standard on each factor, daylight rate should secure 5% of a mean daylight rate and 2% of a minimum daylight rate, brightness ratio of maximum illumination to minimum illumination should be under 10:1, and in glare there should not be an occurrence factor from a reflector outside of the classroom. And the factors of unnatural lighting are illumination, brightness, and glare. In the standard on each factor, illumination should be 750 lux or more, brightness ratio should be under 3 to 1, and glare should not occur. And Optimal reflection rate(%) of Colors and Facilities of Classroom which influences lighting environment should be considered. 3) In indoor air environment factors, thermal factors are divided into (1) room temperature, (2) relative humidity, (3) room air movement, (4) radiation heat, and harmful gases (5) CO, (6) $CO_2$ that are proceeded from using the heating fuel such as oval briquettes, firewood, charcoal being used in most of the classroom, and finally (7) dust. In the standard on each factor, the next are necessary; room temperature: $16^{\circ}C{\sim}26^{\circ}C$(summer : $E.T18.9{\sim}23.8^{\circ}C$, winter: $E.T16.7{\sim}21.7^{\circ}C$), relative humidity: $30{\sim}80%$, room air movement: under 0.5m/sec, radiation heat: under $5^{\circ}C$ gap between dry-bulb temperature and wet-bulb temperature, below 1000 ppm of ca and below 10ppm of $CO_2$, dust: below 0.10 $mg/m^3$ of Volume of dust in indoor air, and ventilation standard($CO_2$) for purification of indoor air : once/6 min.(about 7 times/40 min.) in an airtight classroom. 4) In the standard on noise environment, noise level should be under 40 dB(A) and the noise measuring way and the countermeasures against it should be considered. 5) In the standard on odor environment, odor level under Physical Method should be under 2 degrees, and the inspecting way and the countermeasures against it should be considered.

  • PDF

WHO/WPRO 표준 경혈 위치의 이해 : 일반기준을 중심으로 (Understanding of the WHO Standard Acupuncture Point Locations in the Western Pacific Region : General Guidelines)

  • 구성태;김용석;임윤경;최선미;강성길
    • Korean Journal of Acupuncture
    • /
    • 제27권2호
    • /
    • pp.1-11
    • /
    • 2010
  • Objectives : The aim of the study is to explain the general guidelines of the WHO standard acupuncture point locations (APLs). Understanding the general guidelines will enable experts to make the clear use of the standard APL for education, research and practice. Methods : In the beginning of development of the standard APL, experts made general guidelines to draw mutual agreements of the three nations (Korea, China, and Japan) on the standard APL. The guidelines include point locating methods, syntax of descriptive sentences, landmarks on body surface, reference acupuncture points, usage of anatomical terminology, and proportional bone measurements. Results : We found that there are some considerable problems in practical use of the APLs due to the strict application of anatomical terms, even on accessory phrases such as region of body in the sentence of each description. Conclusions : We hope that the study helps readers expand the understanding of the newly developed standard APLs resulting from increased application of acupuncture points. Also, it would be a reference to revise the WHO standard APLs in the future.

임상실습 학생을 대상으로 한 위전도검사와 Nepean Dyspepsia Index(NDI) 설문검사와의 연관성 연구 (Correlation Study between Electrogastrography and Nepean Dyspepsia Index (NDI) in Clinical Practice Students)

  • 최진용;배고은;심소현;서희정;서형범;최준용;권정남;이인;홍진우;윤영주;박성하;한창우;김소연
    • 대한한방내과학회지
    • /
    • 제39권4호
    • /
    • pp.732-740
    • /
    • 2018
  • Objective: The aim of this study was to find a correlation between the Nepean Dyspepsia Index (NDI) and electrogastrography (EGG) in clinical practice students. Methods: In total, 28 students were enrolled. NDI and EGG were measured in all students. NDI was classified as abnormal when the score was 11 or more. In EGG, standard 1 was classified as abnormal if the preprandial or postprandial percentage of normal gastric slow waves of Ch3 was less than 70% or if power ratio of Ch3 was less than 1. Standard 2 was classified as abnormal if standard 1 was met or if the percentage of normal gastric slow waves of Ch3 decreased after meals. Results: NDI and EGG had no statistically meaningful correlation when standard 1 was used, but NDI and EGG had statistically meaningful correlation when standard 2 was used. Conclusions: These findings suggest that NDI and EGG are correlated and that EGG can be used to evaluate the degree of dyspepsia.