• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.569-581
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• 1996

A microcomputer -based data acquistion system was designed and developed at Michigan State University , USA to conduct field data studies. The system designed for the research carried out used an Apple IIe microcomputer for collecting data on-board the tractor. An AII3 Analog to Digital (A/D_ convertor was chosen to interface each analog signal to the microcomputer. A commercially available Dj TPM II was employed to display information such as an engine speed, ground speed, percent drive wheel slip , distance travelled and area covered per hour. The frequency output from the radar unit was channeled through a frequency to voltage (F/V) convertor , so that AII3 Analog to Digital (A/D) convertor could read it. The fuel consumption was measured using on EMCO pdp-1 fuel flow meter attached to the engine fuel line. The draft of the tillage and other drag equipment was determined using strain gages attached to the drawbar of the tractor. The system was developed to collect the draft and fuel requirements for various farm equipment different kind of soils.

• Industrial Engineering and Management Systems
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• 제12권4호
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• pp.351-358
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• 2013

This paper proposes a multiobjective model describing the trade-offs involved in selecting the locations of drop-off boxes for collecting used products and transporting these products to designated locations. We assume the following reverse flow of used products. Owners of used products (cellular phones, digital cameras, ink cartridges, etc.) take them to the nearest drop-off box when the distance is reasonably short. We also assume that owners living closer to drop-off boxes dispose of more used products than do owners living farther from drop-off boxes. Different types of used products are collected, with each type requiring its own drop-off box. A transportation destination for each product is specified. Three objectives are considered: maximizing the volume of used products collected at drop-off boxes; minimizing the cost of transporting collected products to designated locations; and minimizing the cost of allocating space for drop-off boxes. We formulate the above model as a multiobjective integer programming problem and generate the corresponding set of Pareto optimal solutions. We apply the model to an area using population data for Chofu City, Tokyo, Japan, and analyze the trade-offs between the objectives.

• 한국농공학회지
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• 제32권4호
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• pp.53-59
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• 1990

To suggest the fundamental data for development of the soil improvement method which increases the permeability in aquifer by jet water, laboratory tests were performed. The results obtained are as follows : 1. The diameter of the improved section was maximum value when the time of water jetting was about 4 minutes, and it was not increased according as the time of water jetting was longer than 4 minutes. 2. It appeared that 2.78 mm in diameter of the nozzle was the most optimum size in the condition of using the 1/8 HP - pump and the diameter of improved section in that case was 15.9cm 3. According to removing fine - soil particles, the original soil was improved, suitable to the purpose of improving, and then the permeability of the improved soil was 100 times of that of the original soil. 4. As the improved soil was satisfied to the design criteria of filter materials, the improvement method in this study will be useful for constructing underground collecting channels or underground collecting drainage canals.

• 정보관리학회지
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• 제29권2호
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• pp.7-25
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• 2012

전자저널의 활용이 급속히 증가하면서 도서관에서는 자관에서 구입되는 전자저널이 얼마나, 어떻게 활용되고 있는지에 대한 관심이 증가하였다. 또한 전자정보 컨소시엄 주관기관에서도 컨소시엄 내에서 유통되는 학술자원의 이용통계에 대한 분석을 통해 국가 차원의 전자학술저널의 유통 현황 파악 및 수요자 중심의 정보수집 정책 개발이 필수적이다. 그러나 기존의 수작업에 의존한 이용통계 수집과 출판사에서 제공하는 저널 이용통계 보고서만으로는 이용에 대한 포괄적이고 심층적인 분석이 불가능하다. 이에 본 연구에서는 대용량 이용통계 수집 및 분석의 기반 마련을 위해 스크린 스크래핑과 SUSHI 프로토콜을 적용한 전자저널 이용통계 자동수집 시스템을 구현하였다. 또 저널 서지정보 및 컨소시엄 계약 데이터베이스를 연동하여 심층적인 이용통계 분석정보를 생성할 수 있는 방안을 제안하였다.

• 대한인간공학회지
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• 제17권1호
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• pp.47-54
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• 1998

Product design and development is very important process in enterprise activities. Reducing development time and reflecting consumer's needs is required to product design and development for increasing benefit and decreasing cost. Human sensibility ergonomics is one of the important technology of R&D in product development. However, the subjective method of human sensibility ergonomics has several problems to analyze and to Quantify experimental data and objective method of human sensibility ergonomics is still in process on study. In this research, new analyzing method is proposed for the subjective human sensibility ergonomics applied with fuzzy set theory. What is the useful theory for controlling uncertain type of information like human mind? This approach is more effective method for analyzing consumer's needs for product design and development process. At collecting needs, certainty scale is added for adapting hedge of fuzzy function. Using a kind of union operator, synthesize each item to analyze identification of each item with fuzzy hamming distance. Identification of analysis is classified with the relational weight using Relationship Chart Method, and is drawn the relationship diagram for clustering each item. A case study with sample test is conducted and demonstrated with this suggested method for more effective way.

• 수산해양기술연구
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• 제52권3호
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• pp.263-270
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• 2016

This study is aimed to design the mechanical gascyclone precipitator with an outstanding collection efficiency as one of ways to reduce exhaust gas of small-scale vessels. It estimated fine particles generated from diesel engines which has become one of the biggest environmental issues currently. Specifically, it quantitatively analyzed the flowing process from the cyclone gas exit; a duct via part to the collecting part of Cylindrical lower using DPIV (Digital Particle Image Velocimetry). Since the gas inlet height part became wider the previous theoretical dimensions, internal fluid characteristics of cyclone where the speed of internal swirl had been slow were investigated by temporary streamline of fine particles at $14-20{\mu}m$. The results showed that collecting efficiency was three times higher than the conical type utilized previously. In addition, this study supplemented imprecision problems from the previous theoretical equation and CFD interpretation with an experimental method. It also provided a basic data to design the cyclone precipitator by size of diesel engines for vessels.

• 한국해양공학회지
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• 제32권5호
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• pp.361-366
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• 2018

The present study analyzed the variation factors in inducing a salinity change using the existing observation network in the section between the Nakdong River Estuary Barrage and Changnyeong-Haman Weir, and also examined the seasonal changes in precipitation, salinity, and discharge. Furthermore, this study analyzed the causes of a salinity increase by collecting observational data during a period when abnormal salinity occurred, and further investigated the salinity transfer time in a section of approximately 5.3 km from the Nakdong River Estuary Barrage to Nakdong River Bridge to understand the behavioral characteristics of the salinity moving upstream. The study results would make it possible to control the increase in salinity and block salt water from moving upstream by understanding the salinity variation characteristics according to the discharge amount. This will provide stability in collecting water from various residential, agricultural, and industrial sources through water intake facilities scattered near the Nakdong River Estuary Barrage.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.1015-1018
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• 2005

본 논문에서는 인터넷을 기반으로 원격으로 기기의 상태에 대한 정보를 접속된 시스템 관리자에게 제공하고, 관리자의 지시를 받아들이기 위한 임베디드 웹 서버를 구축하였다. 이를 통하여 인터넷을 통한 빌딩이나 장비 등의 원격제어를 할 수 있는 Web-Server 개발의 기반이 되었으며, 가전제품, 사무기기, 건물 경비 등의 모니터링용으로 사용 될 수 있을 것으로 기대된다.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.583-593
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• 2021

The purpose of this study was to examine the relationship between transformational leadership and organizational performance with readiness to change and empower knowledge sharing quality as mediating variables. The survey was conducted by collecting the respondents' data by filling up forms which were designed using the google form application and collecting it using WhatsApp. This was performed on 400 respondents, encompassing employees from the National Agency of Drug and Food Control in Indonesia. The research model adopted was validated using Structural Equation Modeling technique with AMOS tool. The findings showed transformational leadership as a significant predictor of readiness to change and it proved relevant in empowering knowledge sharing quality, which in turn affects organizational performance. Furthermore, the effects of both two mediating variables was also examined, and only readiness to change significantly influenced the relationship between predictors of transformational leadership and organizational performance. The findings of this study showed the need for transformational leaders as the research focused on understanding the differences in employee character. This is required to encourage better performance by empowering quality knowledge dissemination mechanisms, with continuous in-house training activities. Therefore, the model adopted in this research and the hypotheses prove the direct effect of transformational leadership on organizational performance, achievable through the mediating role of readiness to change.

• 정보보호학회논문지
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• 제28권1호
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• pp.111-122
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• 2018

안드로이드 운영체제의 서드파티 애플리케이션들은 사용자의 계정 및 개인정보에 대한 접근 권한을 획득하기 위해 OAuth 프로토콜을 이용하여 계정 정보 제공자들로부터 사용자의 크리덴셜 및 사용자의 자원에 접근할 수 있는 권한을 내포하는 접근 토큰을 전달받는다. 이러한 크리덴셜 및 토큰 정보는 안드로이드 운영체제가 제공하는 OAuth 관련 데이터 관리 방식에 의해 기기 내부에 저장되는데, 이 정보가 유출될 경우 공격자는 유출된 크리덴셜 및 토큰 정보를 이용하여 사용자의 계정에 대한 자유로운 로그인 및 데이터 접근이 가능하다. 이러한 특징은 디지털 포렌식 수사관이 증거 데이터를 수집하는 관점에서 피압수자가 사용하는 서비스의 원격지 서버로부터 직접 데이터를 수집하는 것을 가능하게 한다. 원격지에서 수집되는 증거 데이터는 2차적인 영장발부의 토대로 작용함으로써 수집한 디지털 증거의 증거능력을 확보할 수 있기 때문에 피압수자가 안드로이드 기기에서 애플리케이션 삭제 등의 증거 인멸을 시도한 경우 매우 중요한 증거가 될 수 있다. 본 논문에서는 다양한 안드로이드 운영체제 및 기기 환경에서 OAuth 토큰의 관리 현황을 분석하고, 이를 이용하여 다양한 서드파티 애플리케이션의 데이터를 수집하는 방법을 소개한다. 이를 통해 디지털 포렌식 관점에서 피압수자가 사용하는 서비스의 원격지 데이터를 수집함으로써 증거 수집의 영역을 확장할 수 있는 방안을 제안한다.