Infrastructure such as tracks, catenary, rolling stock and signaling systems, and close interface with the human factors of train drivers, shunting staff and maintenance staff are required for train operations. Safety management is the most essential part for the functioning of a train. In line with the safety management, each rail operator has a safety guidance system and the Ministry of Land, Infrastructure and Transport operates Railway Safety Inspector system. Safety Inspector System is to train employees working in the field to be aware of rules and regulations, and to improve identified risk factors. Hence, it is necessary to establish systematic training and inspection methods for safety guidance staff and make clear the roles and responsibilities of safety inspectors according to the Occupational Safety and Health Act, and safety instructors for several inspections according to the Railroad Safety Act.
In the process of construction site accidents disaster a situation is finishing the direction in which most contractors are responsible. Several have way to improve the accountability of the construction participant in a construction site accident, but in particular, prices on improvements to the nakchalje, conducted at the forefront safety awareness to improve the supervision and management supervisor, maps technically allow some advice the knowledge about the technical safety of the safety officer is required and is considered to be especially made by designers and effective safety management from the design phase to improve safety awareness of the Engineer, prime Director and partner Director, hazard safety awareness to improve workers' In order to reduce the is believed necessary.
CT scan 시 X-ray tube는 환자를 중심으로 360° 회전을 하기 때문에 산란선은 모 든 방향에서 발생한다. 임상에서 환자의 피폭을 감소시키기 환자의 흉·복부 전면만을 차폐하고 환자 후면이나 측면에서 발생되는 산란선에 대한 차폐는 시행하고 있지 않 다. 두부(Brain) CT 검사 시 흉부 및 복부에 입사되는 산란선을 ion chamber로 측정 하여 그 분포를 확인하고 두부 CT 검사 시 발생되는 산란선의 분포를 통해 기존 차폐 방법의 적정성을 평가 하고자 한다. 연구결과 gantry angle이 클수록, 전면보다 후면에 서 산란선이 많이 발생했다. 두부 CT 검사 시 발생되는 산란선에 의한 피폭을 최소화 하기 위해 가급적 gantry angle을 작게 줄 수 있도록 환자 두부의 위치를 조정하여 검 사를 하거나 납치마를 이용하여 환자의 흉·복부를 차폐할 경우 전면 뿐 아니라 양 측 면과 후면을 납치마를 이용하여 차폐를 해야 할 것이다.
In the blast work inevitably exists a vacant space between drilling hole wall and explosive. So it cause an blast inefficiency called on a decoupling effect. In this study, For enhancing the detonation efficiency and reducing the environmental problem(vibration, noise, etc.), water is used to fill the vacant space. Water filling has many advantages such as efficiency, low price and workability. In the comparison analysis the field test is carried out. It result on an aspect of the effectiveness and safety. The result measured in the field is as follows; First, the water tube blast reduces the vibration by 16.5% and lessen the noise by 1% comparing to general blast. Secondly, water tube blast makes a separation distance shortened by maximum 15m. Thirdly, in the case that the same quantities of explosive are used, the amount of crushing per hole increased by about 12.8% in water blast method. The quantity of the explosive is reduced by about 11.4% comparing with general blast.
This study intended to exploratively depict both the influence of Environmental Turbulence, Market Orientation, and Learning Orientation of IT companies on Marketing Capability which is one of the organizational performance, and the moderating effects of Learning Orientation and Environmental Turbulence of IT companies on the relationship between Market Orientation and Marketing Capability as well as the relationship between Learning Orientation and Marketing Capability based on respective interactions among related variables. Through this study, several factors contributing to the enhancement of organizational performance such as competitor orientation, shared vision, and open-mindedness were highlighted as major ones, with the fact that competitive intensity, market and technological turbulence of environmental turbulence dimension make effects on organizational performance through interaction effect.
A door of radiation therapy room needs enough shielding ability. However, radiation therapy room needs quick enter for safety of patients. Therefore, To evaluate the shielding ability and stability of each room construction, door format, and control button position. Material is 8 room construction, 6 door format, and 3 control button position. It was compared time and leakage dose according to each type. The hinged door type with handle was best of patients stability, and the sliding door type was best of shielding ability. It is considered necessary, standard on the provision of door format and position of control button about each construction of radiation therapy room.
본 연구에서는 소방시설 중 화재진압에 중요한 역할을 하는 연결송수관설비 송수구 를 대상으로 하였다. 그리고 조사는 아파트에 설치된 60개의 송수구를 조사 및 분석을 실시하여 다음과 같은 결론을 얻을 수 있었다. 조사결과 소방차 전용도로 확보 및 접근성, 설 치높이, 압력범위표시 표지, 이물질방지 마개부착 등이 미흡하게 나타났다. 따라서 소방시설 설계, 시공, 감리를 개선하고 또한 주기적인 유지관리점검이 양호하게 될 수 있도록 제도적 개선이 필요 하다고 판단된다.