This study analyzed the evacuation time in indoor stadiums when exits that automatically open/close when the fire sensor is triggered are installed as a means to improve the problem of closing certain exits. Firstly, when spectators on the 2nd floor stands exit through the 1st floor exits, the RSET of all inhabitants was 529.8 seconds when the automatic opening/closing exits are broken and employees are not present. Secondly, when spectators on the 2nd floor stands exit through the 1st floor exits, the RSET of all inhabitants was 445 seconds when the automatic opening/closing exits with 750mm width are working but employees are not present. Lastly, when spectators on the 2nd floor stands exit through the 1st floor exits, the RSET of all spectators was 337 seconds when the automatic opening/closing exits with 1,500mm width are working and employees are present. As a result, it was revealed that the evacuation time is shortened when the automatic opening/closing exits are working. Additional comparative studies with actual simulations of people evacuating an indoor stadium and firefighting simulations considering smoke flow are necessary.

This paper presents the design and automatic control methods employed to implement a open-close mechanism for a food compression processor. The automatic open-close mechanism is intended as a robust approach in compressing incoming food that posses a wide range of physical properties. The method is based on the estimation of compression pressure through current measurement. Test results show that the proposed mechanism effectively controls the compression pressure of the processed food which results in enhanced overall system robustness.

곤충생태 조사 및 학습관찰효과를 접목한 자동개폐식 곤충 야간채집트랩과 지하부 서식곤충 사육용기를 개발하였다. 곤충트랩은 자동개폐식으로 원하는 시간대별로 채집이 가능하며, 안전채집방식으로 곤충을 살아있는 채로 채집 및 관찰할 수 있는 것이 가장 큰 특징이다. 세부적으로는 관찰부가 설치되고, 타이머의 설정된 시간에 의해 동력전달수단의 작동에 따라 개폐기가 하부 방향으로 이송되면서 개방부가 열리게되는 것과 동시에 관찰부에 구비된 유인등이 발광(빛)되면서 수납부에 놓여 있는 유인물질의 냄새를 맡은 딱정벌레류 등을 유인하여 채집율을 향상시킬 수 있는 학습관찰용 야간채집트랩이다. 학습용 사육용기는 비단길앞잡이 등과 같이 지하부에 은닉하면서 먹이곤충을 포식하는 곤충들에 대하여 학습 및 사육이 가능한 것이 가장 큰 특징이다. 세부적으로는 하우징, 방수용 필름, 덮개로 구성되며 하단부 서식부를 흙으로 서식처를 형성함으로써, 일반적으로 흙속에서 은닉하여 생활하는 곤충의 생태적 특성을 최대한 고려함은 물론, 곤충이 지하 공간까지 자연스럽게 굴을 파고 들어가 생활할 수 있는 공간을 제공하며, 또한 서식처는 흙 외에도 젤(Gel)과 같은 투명하면서 고정된 물질을 이용하면 곤충이 굴을 파고들어가거나 먹이를 갱도속에서 포식하는 장면 등을 직접 관찰할 수 있어 먹이사슬에 대한 학습효과를 높일 수 있는 이점이 있다. 또한 사육용기의 안을 소비자가 직접 꾸미는 등 실내 장식이 가능하도록 고려한 이점도 있다.

The purpose of this paper is to solve the problem that is occuring in assembly process and to progress the productivity by process analysis methods for manu-open and closed model(DWV-20/25DRG), and auto-open and cloesd model(DWV-20/25/DRA)-ventilation fan. Also, this paper is studied by data of ＇D＇ company's product.

The objective of this study was to analyze the determinant factors in the new agricultural technology acceptance targeted to the automatic switchgear for heat-retaining mulching used on the oriental melons farms. The probit and the logit models were estimated using survey data. The result indicated that the level of income, innovativeness, and reliability are important factors of the new agricultural technology acceptance. Therefore, it is considered the level of income, innovativeness, and reliability in advance to extend the new agricultural technology quickly.