• Journal of the Korean Dietetic Association
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• v.26 no.3
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• pp.208-220
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• 2020

In modern society, the online to offline (O2O) market has become an emerging market. Based on social and cultural phenomena, the importance of "FOODTECH" linked with mobile applications is growing in the food and restaurant industry. This study examined subjective food application service quality, perceived value, and post-purchase behavior intentions. According to this study, of foodtech service quality attributes, only information, mobility, and reliability had positive (+) relationships with perceived value. However, foodtech service quality attributes did not have a direct impact on behavior intentions. Perceived values had a positive (+) relationship with behavior intentions and showed full mediation effects between foodtech service quality attributes and behavior intentions. Based on these results, future research on the relationship among food application service quality, perceived value, and post-purchase behavior intentions is needed.

• The Journal of the Convergence on Culture Technology
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• v.3 no.1
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• pp.29-33
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• 2017

As more than 80% of the entire Korean population uses smartphone, an increasing number of applications are being developed to increase the convenience in daily life. Users are also looking for applications associated with health, such as those that help them confirm their health status. While users are use most frequently a health care application, this study was conducted to review an application that can be used in real time to access hospital services. Namely, to manage the health status of users and patients, book online or offline appointments and go through the appointments. The study was conducted using the application of Baeksok University Hospital.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.38 no.2
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• pp.8-16
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• 2015

How to measure and evaluate the performance of managing a store? Although it is important for a retailer to execute good management in a store, there are few efficient measurement tools and methods for In-store management. Also few people are trying to deal with variety of goods (number of categories), depth of a catagory (number of stock-keeping units within a category), and stock level (the number of individual items of a particular SKU) in a store. To solve the problem, this paper suggests the Customer-Retailer Collaboration (CRC) model that utilizes Gamification. By embedding gaming elements, the store management activities can be viewed as more game-like processes. Customers find some problems they encountered in the store and send the related signals via mobile APP, and the relevant store personnel copes with the signals. As the return for their collaboration, they both will obtain points and badge. This paper designs the CRC model and shows the flow of the model briefly.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.11
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• pp.1255-1266
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• 2014

This thesis presents MPU module, Base board and sensor module which are efficient industrial control through design and manufacture as developing S5PV210 CPU of SAMSUNG used by ARM Cortex-A8 based on Android which is Open mobile platform is installed to embedded system. Data for temperature and humidity which are received by sensor module proved the suitability and validity for the real time framework design as implementing application program employed the smart phone App with hybrid application based on DB of web server.

• Journal of Internet of Things and Convergence
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• v.2 no.2
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• pp.27-36
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• 2016

These days, many people are interested in healthy eating. They want to buy organic fruits and organic vegetables for their wellbeing life or to grow the plants themselves. However, if you buy the organic fruits or vegetables carrying costs a lot of money, it would be difficult to bring the plants directly. In this paper, we propose the Smart Plant Growth Chamber to grow plants directly at home. Through proposed the Smart Plant Growth Chamber, users can grow the plants with minimum effort in optimized environment without need to know detailed information about to grow the plants. Also, users can feel fun of growing plants through online activities of the smart plant growth chamber, it is believed to contribute to a health eating.

• Journal of Internet of Things and Convergence
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• v.2 no.2
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• pp.7-13
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• 2016

They produces the products using conveyer belts in many factories. However, so many accidents are occurred in the conveyer belts at the factories. It needs to prevent the any kinds of accidents in the conveyer belts. In this paper, we designed the smart conveyer belt and developed the smart conveyer control mechanism that provides more safe operation. Particularly, We proposed the methodologies to control conveyer belt using smart phone to prevent the accidents. Through this study, we expect the smart conveyer will be adapt to not only factories but also various kind of conveyer such as escalator in the subway.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.346-348
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• 2014

본 시스템은 스마트폰 어플리케이션과 아두이노 보드, 웹서버로 구성된 시스템으로서, 학생들이 보다 편리하게 교내 건물에 출입 할 수 있게 하기 위해서 개발하였다. 학생들이 플라스틱 카드로 만들어진 학생증 없이도 스마트폰 어플리케이션으로, 교내 건물에 출입 할 수 있는 기능을 제공함으로써 많은 플라스틱 카드를 대체할 것으로 생각된다. 이를 통해 플라스틱 카드를 따로 가지고 다니지 않아도 되는 편의성을 제공하며 학생증 분실 위험도 막을 수 있다. 또한 플라스틱 카드 제작을 줄여 친환경의 Green IT를 실현할 수 있다. 학생인증 방법은 스마트폰 어플리케이션에서 종합정보시스템 상의 학번과 비밀번호를 입력하면 서버에서 일치 여부를 확인하여 로그인 승인을 해준다. 이후 블루투스 통신을 통해 아두이노 보드에 출입 요청을 보내면 아두이노 보드에 연결된 모터로 문을 개폐한다. 이외에 학생증의 본래 기능인 학생 증명 기능과 학생증으로 이용할 수 있는 제휴업체의 정보도 제공한다.

• Nuclear Engineering and Technology
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• v.50 no.5
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• pp.801-805
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• 2018

In this study, an underwater radiation detector was built using a GAGG(Ce) scintillator and silicon photomultiplier to establish an underwater radiation exposure monitoring system. The GAGG(Ce) scintillator is suitable for small radiation detectors as it strongly absorbs gamma rays and has a high light emission rate with no deliquescent properties. Additionally, the silicon photomultiplier is a light sensor with characteristics such as small size and low applied voltage. Further, a program and mobile app were developed to monitor the radiation coefficient values generated from the detector. According to the results of the evaluation of the characteristics of the underwater radiation monitoring system, when tested for its responsiveness to radiation intensity and reactivity, the system exhibited a coefficient of determination of at least 0.99 with respect to the radiation source distance. Additionally, when tested for its underwater environmental temperature dependence, the monitoring system exhibited an increase in the count rate up to a certain temperature because of the increasing dark current and a decrease in the count rate because of decreasing overvoltage. Extended studies based on the results of this study are expected to greatly contribute to immediate and continuing evaluation of the degree of radioactive contamination in underwater environments.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.325-327
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• 2014

애플의 iOS가 처음 출시되고 앱 마켓이 공급자와 소비자 모두에게 각광을 받으며 성공하자 구글에서도 Android를 내세워 구글 마켓을 오픈하였고 결국 다양한 종류, 높은 품질의 애플리케이션들이 사용자들에게 공급되게 되었다. 언제 어디서나 스마트 폰을 통해 고품질의 다양한 앱을 이용할 수 있다는 점이 부각되어 각 마켓의 다운로드 횟수가 급증하는 등 폭발적인 앱 시장을 이룩하게 되었다. 하지만 개발자의 입장에서는 같은 솔루션을 개발할 때 모든 플랫폼을 지원하기 위해 각각의 OS에 맞게 따로 개발하기 때문에 오히려 전체 개발기간이 늦어지는 요소가 되었다. 이런 비효율적인 개발 기간을 단축하기 위해 상용엔진을 구매하여 적용하는 경우가 있지만 영세한 규모의 프로젝트 팀에서 적용하기에는 무리가 있으며 엔진 자체를 배우거나 개발하려는 앱을 위한 커스터마이징하는 기간 역시 짧지 않아 좋은 선택이 될 수 없다. 이에 본 논문에서는 모바일 OS 크로스 플랫폼 지원이 가능한 게임 엔진을 구축하기 위한 방법을 설명하고 이를 활용하여 개발된 프로젝트를 테스트하여 초당 54~61frame 이라는 그래픽 출력 속도를 보임으로써 해당 엔진의 활용 가능성을 증명하였다.

• KIPS Transactions on Computer and Communication Systems
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• v.8 no.1
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• pp.9-16
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• 2019

Smartphones are becoming a portable computer. As a result, even the most sensitive financial application services are now available anywhere on the smartphone. Compared to general PCs, smartphones communicate with external devices through various channels such as wireless internet, mobile communication network, Bluetooth, and NFC, and a wide variety of applications are provided. Therefore, if vulnerabilities exist, the possibility of attack damage increases. In this paper, we analyze the vulnerabilities of dynamic virtual keyboards used in login of banking apps of smartphones with various physical constraints and propose countermeasures.