• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
• /
• pp.440-445
• /
• 2007

This paper deals with assessment of risk component for electrical safety and investigation on the spot of computer room in elementary middle high school. The investigation was carried out side by side for floor, outlet, panel board, earth leakage circuit breaker at computer room In order to assess electrical safety at computer room, grounding simulator and power quality monitor have been used. Potential rise has been measured and analyzed for ground rod and grounding grid by using the simulator. Phase and neutral-line current have been monitored in real time. As a consequence, it is desirable for us to install conductive tile at floor of computer room Grounding grid had better than ground rod for electrical safety. Neutral-line current was produced by unbalanced phase current.

• 대한안전경영과학회지
• /
• 제10권3호
• /
• pp.63-71
• /
• 2008

This study was conducted with respect to the causal factors revealed through the investigation of the recent airlines aircraft crash accident which occurred while aircraft was on the climb-out or on the final approach. This study also highlighted the importance of flight deviation and exceedance occurrences in consideration of Flight Operational Quality Assurance Program(FOQA). Twenty airline pilots participated in the flight experiment to perform ten(10) sets of simulated approaches and landings. As a result, Twelve(12) kinds of deviation events were discovered. In this respect, The FOQA program must be fully implemented to prevent any flight safety incident under the auspices of the Korea domestic aviation community as well.

• 한국컴퓨터정보학회논문지
• /
• 제22권1호
• /
• pp.99-106
• /
• 2017

In this paper, the first to identify in detail the direct and indirect causes of trade claims and to provide a way to prevent the causes and measures specific claims. Trade claims is not the best way to prevent in advance, measures to prevent future trade claims is as follows. First, it should be the credit investigation of the counterparts. Second, the contract must determine the rights and obligations of each other through sufficient consultation with contract and faithfully perform its contractual obligations. Third, the explicit trade arbitration clause of arbitration in the contract, and shall be a sufficient review of the procedure such as import and export, international business practices, norms and partners of economic policy, foreign exchange regulations, the trade system transactions. Finally, for it is to be treated as a one-stop strengthening the organization and function, and the Ministry of Commerce and Trade Association, and KOTRA and Trade Insurance Corporation strategic support systems, such as done by covering the work on trade claims prevention and resolution in the Korean Commercial Arbitration Board.

• 한국측량학회지
• /
• 제37권6호
• /
• pp.507-516
• /
• 2019

토지특성조사는 토지가격비준표 작성 및 표준지와 개별지의 특성차이 비교를 통한 지가 산정 과정에서 매우 중요한 과정이다. 따라서 토지특성조사는 최대한 객관적이고 합리적이며 일관성 있게 이루어져야 한다. 그러나 현재 토지특성조사는 지자체 공무원과 감정평가사의 경험이 상당수 반영되고 있기 때문에 객관성과 일관성을 보장하기 어렵다. 본 연구에서는 현행 토지특성조사 항목 중 고저의 조사방식을 분석하여 문제를 정의하고, 고저 분류를 위해 토지의 고저 정보를 공간정보 기술 기반으로 수치화하여 이를 데이터 마이닝 기법 중 하나인 C4.5을 적용하여 고저를 분류하는 방법을 제시하였다. 서울시의 표준지 고저 조사 결과와 필지의 공간정보를 C4.5 모델에 적용한 결과에서는 기존 감정평가사의 조사 결과 약 93.5% 일치 하는 것으로 나타났다.

• The Journal of Korean Physical Therapy
• /
• 제14권4호
• /
• pp.224-233
• /
• 2002

General massage and sports massage techniques are kneading, petrisage and tappotment. These will be improve physiological reaction. Connective tissue massage is a reflex zone massage in the subcutaneous tissues. These are superficial and deeper fascia, intermuscular septa, blood vessel, perinerve tissue. It is frame work on organs in human-being, Therefore, abnormality of there tissues are a pathologic change of the organs. The pathologic changes are fined with visible investigation, manual investigation and stroking investigation on the reflex zone. The stroking on the reflex zone is the treatment also. Stroking methods are depend upon tissues and area. Short strokings are directed at approximately right angles against bone, muscular or facial board. Long strokings are very often follow the original cleavage lines. The back is divided for treatment purposes into sections. There are basic section, thoracic section and cervical section.

• 복식문화연구
• /
• 제11권5호
• /
• pp.721-736
• /
• 2003

As for the purposes of the research: First, on the wearers of snowboard wear on the market, I intend to investigate contents related with purchase, price, brand, style, etc., and grasp requirements and complaints. Second, I intend to know the evaluations of users according to itemized questions on the snowboard wear on the market. Third, I like to provide basic materials by investigating itemized requirements for the development of snowboard wear. On the male & female snowboarders on a skiing ground, I carried out a preliminary investigation in December, 2001, and a main investigation from January to February, 2002. The results are as follows: 1. Many of them purchased imported quality goods, and the rate purchase was high between 20～25 year. Loose two-piece suits of different colors were preferred. The most uncomfortable part proved to be a neck part. 2. The degree of general satisfaction with the snowboard wear on the market was 4.60. And in terms of itemized evaluation, dissatisfaction was found in Clothing construction, facility of laundry and handling, price and brand rather than in style, fiber composition and tactile sensation. 3. In the investigation of the requirements in case of snowboard wear development, the most common requirement was the facility of action. I believe this should be met by study on the choice of pertinent margin and the pattern development.

• 천문학회보
• /
• 제43권1호
• /
• pp.53.1-53.1
• /
• 2018

During a major solar eruption, the erupting plasma is possibly out of the equilibrium ionization state because of its rapid heating or cooling. The non-equilibrium ionization process is important in a rapidly evolving system where the thermodynamical time scale is shorter than the ionization or recombination time scales. We investigate the effects of non-equilibrium ionization on EUV and X-ray observations by the Atmospheric Imaging Assembly (AIA) on board Solar Dynamic Observatory and X-ray Telescope (XRT) on board Hinode. For the investigation, first, we find the emissivities for all the lines of ions of elements using CHIANTI 8.07, and then we find the temperature responses multiplying the emissivities by the effective area for each AIA and XRT passband. Second, we obtain the ion fractions using a time-dependent ionization model (Shen et al. 2015), which uses an eigenvalue method, for all the lines of ion, as a function of temperature, and a characteristic time scale, $n_et$, where $n_e$ and t are density and time, respectively. Lastly, the ion fractions are multiplied to the temperature response for each passband, which results in a 2D grid for each combination of temperature and the characteristic time scale. This is the set of passband responses for plasma that is rapidly ionized in a current sheet or a shock. We investigate an observed event which has a relatively large uncertainty in an analysis using a differential emission measure method assuming equilibrium ionization state. We verify whether the observed coronal plasmas are in non-equilibrium or equilibrium ionization state using the passband responses.

• 조명전기설비학회논문지
• /
• 제19권1호
• /
• pp.101-108
• /
• 2005

도로에 설치된 가로등설비는 감전위험성에 노출된 취약한 구조로 급격한 호우로 인한 침수발생으로 매년 감전사고자가 다수 발생하고 있는 실정이다. 이에 가로등설비에서의 감전사고를 방지하기 위해, 실제 주요간선 도로 현장에서의 조사가 수행되었다. 가로등 분전함의 회로구성, 배선방법, 접지도체, 등주 등에 대해 실태조사가 실시되었고 관련 규정의 분석 및 문제점이 제시되었다. 또한 국내${\cdot}$외 가로등설비의 실태조사를 통해 비교 및 분석되었고, 이를 토대로 관련 규격이 개정되었다. 현장실태조사 및 관련규정의 분석을 통해, 주요간선 도로에 설치된 가로등설비에서의 감전사고에 대한 효과적인 예방대책을 확립하는데 실질적 자료를 제시하고자 한다. 향후 분석 자료는 가로등설비 뿐만 아니라 도로상의 다른 전기설비의 안정화 및 전기재해를 감소시키는데 활용될 수 있다.

• 보존과학회지
• /
• 제38권4호
• /
• pp.265-276
• /
• 2022

A long-term monitoring investigation at Sarushima Battery (Kanagawa, Japan), which is one of the modernization heritages was conducted from 2017.06 to 2020.12. The investigation of the temperature and relative humidity (RH), measurement of the amount of brick decay, and X-ray diffraction analysis of the brick decay was conducted to understand in detail the environment in which the historical brick structure, the state of deterioration, identify the factors of deterioration. Furthermore, it was discussed whether the suitability of these investigation methods for assessing the status, identifying the level of deterioration and the factors that led to deterioration at the historical brick heritages. It was found that the brick deterioration at the site progressed especially in two periods: in April, and from June to August. These periods coincided with the period when the RH inside the structure decreased, and the Toyo-gumi bricks were in the process of absorbing moisture. Several different types of salts were detected in brick decay, especially thenardite, which is considered highly hazardous and destructive during periods when the amount of brick decay increased. Therefore, the RH in the structure and the salts present in the bricks were identified as one of the factors in the deterioration of the bricks at the site. The methods used in this study are appropriate as the initial survey methods for investigating the current conditions and identifying the causes of deterioration because it is possible to understand the environment within the modernization heritages, grasp the details of deterioration progression, and identify the characteristics of deterioration progression and its factors through long-term investigation using the simple methods.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2007년도 추계학술대회논문집
• /
• pp.174-177
• /
• 2007

In this paper the noise characteristics of metro train is investigated experimentally. It is primarily aimed at observing the squealing noise radiation of each wheel when the vehicle pass the curve sections. This will be used to understand the noise excitation mechanism at the contact area between squealing wheels and rails which induce squeal noise at curve sections. To identify the related key parameters and boundary conditions on-board monitorings of the noise, vibration of the wheel and bogie and displacement behaviour of the wheels and rails have been done. In this paper only noise measurement and results are discussed. From spectrogramms squeal noise due to creepage and noise due to flange contact of the wheels could be identified. At the moment of the curve passing the highest squeal levels are found on the front inner wheel. However since curve noise depends on variable factors more analyses will be followed to identify the squealing wheels and the noise excitation.