• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.11
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• pp.1217-1224
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• 2015

The doorlock using buttons has been widely used since it does not exploit the physical key and has much functions though it is cheap. However, the doorlock has problems where it is easy to forget the secret number since the user has to remember the number and difficult to keep secure when the one secret number has been used for a long time. In this paper, we propose the doorlock system using the near field communication. The proposed system controls the open and close of the doorlock using user data acquired by the near field communication tag, The implemented doorlock system has the benefit to control the doorlock without a secret number.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.106-107
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• 2021

This paper implements a door lock using PIR sensor based on Arduino. When the PIR sensor detects movement, the door lock device is activated and RFID tags can be used. This door rock can prevent lonely death by detecting whether the resident is in or out, and it also has hygienic advantage because it unlocks without contact by using RFID. In addition, as door locks are frequently used in everyday life, the above-mentioned implementation can also increase participation in hands-on lectures.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.133-134
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• 2023

In general, all buildings are equipped with various types of handles for opening and closing the door, and unlike wooden doors, steel doors such as fire doors are equipped with a box-shaped door lock box frame surrounding the outside of the door lock to protect the door lock, which is called a cylinder protection cover. These cylinder protection covers have various types and types of fastening structures, and the cylinder protection covers on the market are molded in factories and standardized according to the size and shape of the door lock, requiring various types of cylinder protection covers. Accordingly, a variable cylinder protection cover with a simple prefabricated structure that can fundamentally solve these problems can be used as one cylinder protection cover regardless of the type, shape, and size of the door lock.

• Journal of Science and Technology Studies
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• v.10 no.2
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• pp.77-105
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• 2010

This essay aims to look into the possibility and limit of a technological fix with the PSD (platform screen door), which was proposed as the solution of subway risk problems. Subway risk problems may be classified into five categories-on-rail accidents, in-station accidents, platform accidents, spatial risks in underground, and risks due to a crime or terror-, and the platform accidents, which happens at the interface between the rail and the station, is the most serious and prominent. The PSD is considered as an effective technical means to prevent platform accidents. However, there remains a possibility of aggravating unexpected and invisible risks. When a fire breaks out in platforms, especially at exchange stations during the rush hour, the PSD can become a "wall of outcrying", since it may act as the "safety shutter" which killed many people in the 2003 Daegu subway disaster. This is why we need to look into the limit of a technological fix with the PSD.

• Analytical Science and Technology
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• v.24 no.4
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• pp.290-297
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• 2011

In present, evaluation method for car cabin air quality has been developed in ISO, China, Japan. Also The management standard for new produced car has been applied since 1, July, 2010. To manage car cabin air quality, It is important to evaluate VOC emitted from interior material. In this study, complete component of door trim armrest was evaluated in accordance with ISO 12219-5, cut component was evaluated in accordance with ISO 12219-3. The vapour gas was collected with stainless tube packed with Tenax TA and analyzed with TD-GC/MS. It was confirmed that emission rate of each compounds was difficult in each evaluation method. As a result, to evaluating each components composing door trim armrest, main sources of emitting VOCs in door trim armrest were PP substrate and adhesive.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.831-834
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• 2011

This paper is intended as performance verification of efficient container door Open/Closed detection mechanism for Container Security Device(ConTracer) to container cargo transportation. Container door Open/Closed detection mechanism using Reed sensor is important to satisfies the US Department of homeland security customs and border protections requirements to many types of container door. Also, Verify that the container door is configured correctly and that you can check the illegal opening. In this article, Performance valuation of this Contacer on reed sensor has been verified through field test for each other 30 containers. Once the improvement has been made, we are suggest that propose skills will meet the highest standards for container security safety.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.547-560
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• 2015

The outdoor recreation fever that is drastically increasing in Korea could be the result of the interaction between mass media and popular culture as well as increase of leisure time and disposable income. Thus, the purpose of this study is to specify how the exposure of outdoor recreation through mass media influences potential outdoor recreationists. In order to specify this decision-making process, playfulness, which is the intrinsic characteristic of adults' fun and play, was added to the theory of planned behavior, which has high explanation power regarding human behavior. As a result of the study, it turned out that playfulness significantly influences attitude, subjective norm, and perceived behavioral control, and that attitude, subjective norm, and perceived behavioral control also significantly influence behavioral intention. These results specify that playfulness is a factor that has a great effect on outdoor recreation that seeks deviant behavior.

• Science of Emotion and Sensibility
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• v.7 no.1
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• pp.1-7
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• 2004

This study aims to validate the effectiveness of CAVE system with an Arm-Master in the evaluation of virtual prototypes. A virtual kitchen with a refrigerator was presented in the CAVE system. Subjects put in and pull out virtual objects by using the Arm-Master. Twelve subjects, six males and six females, participated in the six experimental conditions : three types of refrigerator door grips and two reaction forces. After each trial, subjects evaluated a door grip of the virtual refrigerator in terms of easiness of operation, similarity in force, presence etc. The results show the mean values of vortical-type door grips are greater than the horizontal pocket-type door grip. Also the subjects preferred 5N in the reaction force of the Arm-Master rather than 15 N when they open and close virtual door. Unexpectedly, female subjects significantly marked low scores in the evaluation terms compared ruth mali subjects. It explains the Arm-Master should be modified much more if it works effectively in design evaluation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.5
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• pp.1027-1034
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• 2017

Recently, OTP (One-time-Password) log-in methods have been used in many areas to prevent leakage of personal information and enhance security. The OTP method is primarily used for security of bank personal account, this is one of the sophisticated security ways in which one time password is generated and checked to enhance security. Digital door locks frequently used in everyday life require convenience and safety simultaneously. Meanwhile, related technologies for digital door locks are evolving, but methods for enhancement of security are still unsatisfactory. Generally, the digital door lock using password input type has been most commonly used and especially it provides more convenience, but it has some problems such as password exposure and password oblivion. Therefore, in this study, we propose and implement the OTP-based digital door lock system with enhanced security and convenience features but without the risk of password exposure and oblivion.

• KIPS Transactions on Software and Data Engineering
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• v.3 no.6
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• pp.237-242
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• 2014

Current digital door lock systems are mainly designed for users' convenience, so they have weakness in security. Thus, this paper suggests a video digital doorlock system grouped with a relay device, a server, and a digital doorlock with a camera, sensors, and communication modules, which is detecting or recognizing objects approaching to the front of the door lock system and sending images and door-opening information to users' smart devices. Experiments showed that the suggested system has 96~98% recognition rate of approaching objects and requires 17.1~23.9 seconds for transmission on average, depending on network systems. Therefore, the system is thought to have enough capability for real time security response by monitoring the front area of the doorlock system.