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모바일 장치를 위한 iSCSI 프로토콜 기반의 가상 USB 드라이브 설계 및 구현
최재현,남영진,김종완,Choi, Jae-Hyun,Nam, Young Jin,Kim, JongWan 대한임베디드공학회 2010 대한임베디드공학회논문지 Vol.5 No.4
This paper designs a virtual USB drive for mobile devices which gives an illusion of a traditional USB flash memory drive and provides capacity-free storage space over IP network. The virtual USB drive operating with a S3C2410 hardware platform and embedded linux consists of USB device driver, an iSCSI-enabled network stack, and a seamless USB/iSCSI tunneling module. For performance enhancement, it additionally provides a kernel-level seamless USB/iSCSI tunneling module and data sharing with symbol references among kernel modules. Experiments reveal that the kernel-level implementation can improve the I/O performance up to 8 percentage, as compared with the user-level implementation.
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Global Grain Price Transmission to Korean Agricultural and Food Prices
최재현,한두봉 한국농업경제학회 2017 農業經濟硏究 Vol.58 No.3
This study examines the price transmission of global grain prices on Korean agricultural and food markets. Furthermore, it tests the structural break points of global grain prices and analyzes whether their impact changes before and after the global financial crisis and agflation. The results are as follows. First, the structural break of global grain prices was found in May 2007. Second, causal relationships between global grain prices and domestic agricultural and food prices were also changed after the global financial crisis and agflation. Third, a significant price transmission from global soybeans price to domestic soybean price was observed only after 2007. Meanwhile, domestic wheat prices show significant price transmissions following the changes in global wheat prices in both periods. Fourth, the price transmission of global grain prices on domestic processed food prices was significant both before and after 2007. Lastly, an asymmetric price transmission between global and domestic prices was found only before 2007.
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도시 전통시장의 입체녹화 도입을 통한 활성화 방안에 대한 인식이 미치는 행동에 대한 연구
최재현 (사)한국정원디자인학회 2021 한국정원디자인학회지 Vol.7 No.3
본 연구의 목적은 실증적 분석을 통해 입체녹화 설치 시 전통시장의 활성화에 대해 입체녹화가 주는 영향에 대한 물리적 요소를 식별하기 위해 진행되었다. 대상지는 서울 도심에 위치하고 있으며, 국내 소비자뿐만 아니라, 외국인, 관광객 등의 발길이 끊이지 않고 도심 상권에 활력을 불어넣고 있는 전통시장으로 선정, 진행하였다. 본격적인 설문조사는 2019년 1월 28일부터 2월 22일까지 서울시내 전통시장을 이용자 또는 방문자를 대상으로 실시하였다. 그 결과, 총 515개의 설문지가 회수되어 본 연구의 분석에 사용되었다. 연구 결과는 다음과 같다. 첫째, 심리적 요소, 물리적 요소, 다양성, 기능적 요소, 안정성, 기대 및 활성화 인식과 같은 전통 시장의 활성화 요소는 모두 긍정적으로 나타났다. 둘째, 전통시장의 활성화 요소, 즉 물리적, 심리적, 기능적, 안정성 및 다양성 요소들은 기대와 활성화 인식에 직접적으로 영향을 미치는 것으로 나타났다. 또한, 기대 효과로는 활성화 인식에 긍정적인 영향을 미치는 것으로 드러났다. 셋째, 기대치가 물리적, 심리적, 다양성, 기능적, 안정성 요소 및 활성화 인식 사이의 관계에 미치는 간접적인 영향이 유의한 것으로 나타났으며, 소벨테스트 결과로 활성화 요소와 활성화 인식 사이의 관계가 중재 효과가 있음을 보여주었다. 이번 연구를 통해 전통시장의 활성화를 강조하면서 재래시장에서의 다차원 공원화를 통한 활성화 개념에 대한 종합적인 평가를 위한 척도를 제시했다. 본 연구의 결과는 재래시장의 기대와 활성화를 강화하기 위해 재래시장 활성화 요소의 우선순위를 결정하는 데 사용될 수 있을 것으로 예상된다. The purpose of this study is to conduct an empirical analysis to identify the elements of traditional markets containing multi-dimensional parks that have more influence on the expectations on the multi-dimensional parks and activation recognition. The target sites of this study are the traditional markets located in the heart of the city of Seoul; these places are visited by not only the ordinary consumers of South Korea but also many foreign tourists and invigorating the commercial districts in the downtown area. A survey was conducted for the consumers who used these traditional markets over the period from January 28 till February 22, 2019. As a result, a total of 515 questionnaires were recovered and used for the analyses of this study. The results of this study were as follows; First, the activation elements for traditional markets, such as the psychological element, physical element, diversity, functional element, stability, expectation, and activation recognition, were all positively related. Second, some of the activation elements for traditional markets, i.e., the physical, psychological, functional, stability, and diversity elements directly influenced the expectation and activation recognition directly. Also, the expectation turned out to have a positive influence on activation recognition. Third, it turned out that the indirect effect of expectation on the relationship between the physical, psychological, diversity, functional, stability elements and activation recognition was significant. In addition, the result of Sobel-test showed that the relationship between activation elements and activation recognition had a mediating effect. Through this study, the researcher suggested a scale for a comprehensive evaluation on the concept of activation, which is the ultimate goal, through the application of the multi-dimensional parks to traditional markets, while re-highlighting the activation of traditional markets. The findings of this study, it is expected, may be used to determine the priorities of the activation elements for traditional markets in order to enhance the expectation and activation of traditional markets.
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최재현 한국군사과학기술학회 2002 한국군사과학기술학회지 Vol.5 No.2
In this paper, a study on the design of the transmitter-receiver of fuze sensor for discriminating target position is presented. We propose the algorithm for detecting target distance/direction through investigating the operational concept and principle of fuze sensor. Based on the algorithm, We design transmitter-receiver, calculate various design variables and estimate the performance of that one. The estimated result shows that the required performance of fuze sensor is satisfied. Further research on confirming the performance of proposed algorithm through encounter simulation test with real target and resolving problem will be continued.
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Statistical Analysis of Construction Productivity for Highway Pavement Operations
최재현,류한국 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.5
Highway pavement operations were generally known as a collection of repetitive and equipment-intensive activities with lower variability in its daily productivity. However, previous research showed that the pavement operation was still vulnerable to the external factors that influenced productivity. The purpose of this study was to statistically analyze the factors that affected pavement operation in order to verify the cause-and-effect of those factors. The researchers selected four highway construction projects to collect productivity data from and evaluated the effect of various interference factors on productivity. Correlation analyses were performed to verify the effect of inclement weather conditions and prerequisite work on the pavement crews’ performance. It was verified that any type of interference lowered productivity and the effects became severe if multiple interference factors occurred on a single workday. Industry practitioners needed to make an informed decision to avoid interference by recognizing the causes and effects of the interference factors and to reduce risks associated with the factors that negatively affected productivity.
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