금융정보시스템 품질과 흡수역량이 금융성과에 미치는 매개효과 연구

노재우(Noh, Jae-Woo),양해술(Yang, Hae-Sool) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.6

초기의 금융정보기술은 독자적인 시스템을 개발․도입하는데 높은 비용을 투자하였다. 오늘날의 금융정보기술 도입은 내부 효율성제고와 경비 절감에 있으나 장기적 전력차원을 고려 기업의 경쟁우의를 확보하는데 활용한다. 정 보시스템 품질과 성과측면에 활발한 연구가 진행되고 있으나, 최근에는 정보시스템을 사용하는 사용자 측면도 중요한 사항으로 대두되고 있다. 기존연구에서는 정보시스템 품질이 성과에 미치는 영향 관계 연구와 흡수역량이 성과에 미 치는 영향 관계연구만 살펴보고 있다. 즉, 정보시스템 품질과 흡수역량을 독립변수의 위치에서 각각 경영성과에 유의 한 영향을 미치는 요인으로 연구되어지고 있는 것이다. 반면 이 두 변수간의 관련성에 대한 연구는 부족한 실정이다. 본 연구에서는 금융정보시스템 품질과 흡수역량을 각각 독립변수와 매개변수로 금융성과에 미치는 매개효과를 연구 해 보았다. 연구결과 금융정보시스템 품질은 기업성과에 긍정적인 영향을 미치는 것으로 나타났으며, 흡수역량은 완 전매개 역할을 하는 것으로 나타났다. 그러나 흡수역량이 독립변수로써 금융성과에 긍정적인 영향을 미치고 있으나, 금융정보시스템 품질을 매개변수로 하여서는 영향을 미치지 않는 것으로 나타났다. Whereas the early financial information technology invested a large amount of investment on developing and adopting its own new systems. it is now focusing on reducing expenses and improving internal efficiency but applied for securing a company's competitive advantage considering the long term strategic level. As relevant researches, studies on information system quality and performance are actively going on. In previous research, the relations of the influence on the financial performance by information system quality or absorption capacity have been reviewed. In other words, the information system quality and absorptive capacity, respectively, in the position of the independent variables have been studied as a factor to have a significant effect on financial performance while the research on the relationship between these two variables is lacking. Thus, in this researches, quality of financial information systems and the absorptive capacity, respectively, as independent variables and parameters on the mediating effect on the financial performance were researches. As a result, quality of financial information systems showed a positive effect on the performance of company, the absorption capacity was perfect to play the role of mediating one. However, absorptive capacity as an independent variable has a positive impact on financial performance, but the quality of financial information systems as a parameter was not affected in any manner.

엔터프라이즈 프레임워크에서 닷넷 기반의 컴포넌트 워크플로우 가변성 구현 기법

노재우(Jae Woo Noh),이승훈(Seung Hun Lee),류성열(Sung Yul Rhew) 한국전자거래학회 2004 한국전자거래학회지 Vol.9 No.2

컴포넌트 기반 개발(Component Based Development, CBD)은 미리 구현된 블록단위의 컴포넌트를 사용하여 소프트웨어 개발 비용 및 시간을 단축할 수 있다. 또한 컴포넌트는 내부의 상세 부분을 숨기고 인터페이스를 제공하여 대형 어플리케이션을 개발하는데 복잡성을 감소시킬 수 있다. 엔터프라이즈 프레임 워크환경에서의 패밀리(Family)의 공통적인 요구사항은 컴포넌트 내 업무 워크플로우 형태로 표현될 수 있으나, 다양한 패밀리 멤버(Family Member)의 요구사항에 특화된 워크플로우를 하나의 컴포넌트 내에 표현하는 것은 매우 어렵다. 따라서 패밀리 멤버(Family Member)를 위한 컴포넌트간 워크플로우 가변성 관리 및 구현 방법에 대한 필요성은 끊임없이 요구되어 왔다. 본 논문에서는 NET 기반 하에 엔터프라이즈 프레임워크에서 컴포넌트 워크플로우 가변성을 위한 구현 기법을 제시한다. 제시된 컴포넌트 워크플로우 가변성 구현 기법은 엔터프라이즈 프레임워크에서 패밀리가 사용할 수 있는 공통 업무 워크플로우가 컴포넌트 내에 이미 생성되었음을 가정하며, 다양한 패밀리 멤버에 특화된 컴포넌트간의 워크플로우 구성 및 실행을 위한 기법으로 컴포넌트간 워크플로우의 확장성을 높여주게 된다. CBD(Component Based Development) can make use of component of block unit that is implementation beforehand and shorten software development cost and time. Also, component can reduce complexity for the large application development because it can hide detail part of internal and offer interface. Common requirement of family in the enterprise framework environment can express workflow, but it is very difficult that express special workflow in single component on various family member’s requirement. Therefore, necessity about workflow variability management between component for family member and implementation method had been required constantly. This treatise presents implementation techniques for component workflow variability in enterprise framework under NET base. Presented component workflow variability implementation techniques supposes that commonness business workflow that family can use in enterprise workflow was created already in component, and improve workflow’s extensity between component by workflow composition between special component and techniques for practice to various family member.

유통·물류 적용을 위한 수동형 UHF RFID 태그의 성능 분석

노재우(Jae-Woo Noh),장리검(Li-Jian Jhang),이찬호(Chan-Ho Lee),안병철(Bierng-Chearl Ahn),채윤경(Yoon-Kyoung Chae) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.12

In this paper, the performances of passive UHF RFID tags, which are ordinarily used in distribution and logistics applications, are measured and analyzed. Major factors of the performances on the tag contain a tags sensitivity S<SUB>tag</SUB>, a backscattered power ratio ηBS, a backscattered modulation depth ΔM, and a reading range in the static state and recognition ratio in the dynamic state. The measurement procedures based on theoretical approaches of these major factors are concretely presented. 20 types of tags are chosen and 30 items are randomly selected at each tag-type for enhancing the measurement reliability. It is desirable to use tags having the sensitivity of less than ±0.5 dB in comparison with the mean value of selected samples for obtaining proper reading range. Tags show high recognition ratios in the use of dynamic state, which attached on the product box far away nearby metal structures and have the modulation depth greater than 3mV.

210m 높이 eLoran 송신 안테나 설계

최순우(Swoon-Woo Choi),노재우(Jae-Woo Noh),임주영(Ju-Young Lim),정용선(Yong-Sun Jung),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.7

This paper proposes a 210-m high eLoran transmitting antenna. The proposed antenna consists of a ground, a center post, four slant wires, four horizontal wires, a feeding post and a shorting post. Four slant wires are connected to the end of the center post for top loading and their ends are connected by four horizontal wires for structural support and connected to the ground by insulated wires. The feeding post and the shorting post are connected to a horizontal wire at suitable points. A 1/550 scale model of the optimally designed antenna is fabricated and measured. Measurements show that the fabricated antenna has reflection coefficient of less than -6dB over 4.23 MHz bandwidth centered around 57.3MHz and maximum gain of 1.1dBi.

태양 일사량 데이터 기반 지역별 녹조 발생량 예측 모델 개발

김익환(Ik Hwan Kim),노재우(Jae Woo Noh),강현욱(Hyun Wook Kang) 한국태양에너지학회 2022 한국태양에너지학회 학술대회논문집 Vol.2022 No.10

2.4-GHz ZigBee 통신용 원편파 패치 안테나 최적 설계 및 구현

홍기표(Ki-Pyo Hong),노재우(Jae-Woo Noh),서무현(Mu-Hyun Seo),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.8

A communication path between a sensor node installed underneath a railway cabin and a sensor node installed inside a cabin is a non-line-of-sight link with a high degree of polarization rotation, in which case circularly polarized antennas are advantageous. This paper presents a circularly-polarized patch antenna for a ZigBee sensor node operating inside a railway cabin. The proposed antenna consists of a rectangular patch, a patch feed circuit, and a metal case. An FR-4 circuit board is employed as a radome by using it as a lid of the metal case and by printing the patch on its backside. The patch feed circuit is realized with a power divider and a 90° phase delay line in a GCPW having low radiation and placed beneath the patch circuit board. Measurements show that the proposed antenna has a gain of 7.5dB and an axial ratio of 3dB at 2.45GHz, and a reflection coefficient of less than -10dB at 2.4-2.5GHz.

E-band Bøifot 직교모드변환기 설계

이주(Li-Shu),노재우(Jae-Woo Noh),바양뭉흐 엥흐바야르(Bayanmunkh Enkhbayar),방재훈(Jae-Hoon Bang),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.8

In this paper, a wideband Bøifot ortho-mode transducer operating at the E-band is designed and fabricated. The proposed ortho-mode transducer consists of a polarization separation section having dual ridges and a T-shaped divider, 6 E-plane bends and an Y-shaped junction. A common port of the ortho-mode transducer is employed with the square waveguide having dimensions of 3.1×3.1mm and its side/straight ports are implemented with the WR-12 rectangular standard waveguide. In designing the ortho-mode transducer, each component is individually optimized and then the overall configuration is assembled. The effects on the major parameters are analyzed with the parametric-sweep methods for the combined structure. The optimally designed ortho-mode transducer is fabricated with 2 split blocks. The fabricated ortho-mode transducer has a reflection coefficient of less than -15dB, a transmission coefficient of less than 0.4dB and an isolation between ports of greater than 32dB over the frequency range 60-95GHz.

모노펄스 안테나용 카세그레인 반사경 설계

이준문(Jun-Moon Lee),노재우(Jae-Woo Noh),김동현(Dong-Hyun Kim),최용태(Yong-Tae Choi),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.11

This paper presents a design guide for a monopulse cassegrain reflector antenna operating at 35GHz. The Cassegrain antenna consists of main/sub reflectors, a multi-mode feed horn and a monopulse comparator. In the initial optic design of the cassegrain antenna, the blocking areas formed by the sub-reflector and the feed horn and the edge taper at the reflector aperture are carefully considered. The gain patterns of the cassgrain antenna are calculated by employing the ray-tracing method. A monopulse cassegrain antenna is fabricated to verify the proposed method. The measured far-field gain patterns are fairly agreed with the calculated results based on the ray-tracing method. The fabricated antenna has a sum-channel gain of 36.6dB, a 3dB beamwidth of 2.47°, a sidelobe level of less than -20.2dB and a null depth of less than -30.5dB over the difference channel at 35GHz.

70/80GHz 광대역 직교모드 변환기 설계

김영민(Young-Min Kim),정용선(Yong-Sun Jung),노재우(Jae-Woo Noh),장리검(Li-Jian Zhang),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.7

This paper presents a broadband orthomode transducer (OMT) operating at 70-87GHz. The proposed OMT consists of a T-shaped bifurcation structure, a polarization divider section and three input/output ports. In the initial design step, the dimensions for the T-shaped bifurcation and the polarization divider section are derived from the theoretical approach method. Next, the optimized dimensions of the OMT are acquired by using the parametric-sweep methods. The final model of the OMT is finally designed by adapting low-loss waveguide transitions at each input/output port. The optimally designed OMT is fabricated by three split blocks and measured by using the WR-12 waveguide calibration kits. The fabricated OMT shows that it has a reflection coefficient of less than -17dB, a transmission coefficient of larger than -0.5dB and an isolation of less than -33dB over 70-87GHz.

헬리컬 모노폴을 이용한 T-DMB 안테나 설계

노재우,안병철 충북대학교 컴퓨터정보통신연구소 2014 컴퓨터정보통신연구 Vol.22 No.2

This paper presents a T-DMB band(174-216MHz) antenna employing a helical monopole. The antenna is realized by placing strip-type helical conductor on a dielectric cylinder of 11-mm diameter and 22.5-cm length. The proposed antenna is designed using commercial software and then fabricated and optimized by experimental tuning. Measurements show that the proposed antenna has a reflection coefficient of less than -3dB and a gain of -3.3dB at 180-220MHz.