• 대한의용생체공학회:의공학회지
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• 제18권2호
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• pp.121-126
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• 1997

Endoscopy has become a crucial diagnostic and therapeutic procedure in clinical areas. Over the past three years, we have developed a computerized system to record and store clinical data pertaining to endoscopic surgery of laparascopic cholecystectomy, pelviscopic endometriosis, and surgical arthroscopy. In this study, we developed a computer system, which is composed of a frame yabber, a sound board, a VCR control board, a LAN card and EDMS(endoscopic data management software. Also, computer system has controled peripheral instruments such as a color video printer, a video cassette recorder, and endoscopic input/output signals(image and doctor's comment). Digital endoscopic data management system is based on open architecture and a set of widely available industry standards, namely: windows 3.1 as a operating system, TCP/IP as a network protocol and a time sequence based database that handles both images and doctor's cotnments. For the purpose of data storage, we used MOD and CD-R. Digital endoscopic system was designed to be able to store, recreate, change, and compress signals and medical images.

• 정보관리학회지
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• 제37권1호
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• pp.179-195
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• 2020

데이터의 중요성이 높아짐에 따라 최근 데이터 리터러시가 중요한 개념으로 등장하였다. 본 연구는 인문학 기반 데이터 리터러시 모형을 설계하는 것을 목적으로 한다. 이를 위해 데이터 리터러시 관련 연구를 분석하여 도출한 데이터 리터러시 세부 역량과 디지털 인문학 교육 프로그램의 주요 내용을 분석하여 인문학의 주요한 교육 내용을 결합하여 데이터 리터러시 모형을 설계하였다. 본 연구의 결과인 데이터 리터러시 모형을 적용하여 대학에서 데이터 리터러시 교과 운영시 적용이 가능할 것이며, 향후 데이터 리터러시의 효과성을 평가하는 후속연구를 제안하고자 한다.

• 한국지리정보학회지
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• 제8권3호
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• pp.55-64
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• 2005

본 연구는 사면의 모니터링을 위한 데이터 획득을 위하여 수치사진측량기법을 이용한 실험결과를 제시한 것이다. 근거리 디지털 영상을 도로 암반사변의 모니터링에 적용하기 위하여 수치사진 측량 워크스테이션 상에서 수치고도모형(DEM) 및 정사영상을 작성하고, 3차원 모델링 등 실제적인 사변의 형태를 시각화하였다. 이러한 수치사진측량 생성자료들은 기존 사면의 형태와 특성을 정확하게 조사, 분석하여 각종 공학적 데이터를 추출하고 사변의 DB화 및 사변의 진단과 평가를 위한 객관적이며 과학적인 자료로 활용될 수 있을 것이다.

• 디지털산업정보학회논문지
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• 제15권4호
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• pp.111-116
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• 2019

The digital forensic analysis ensures the integrity of confiscated data by calculating hash values for seizure and search of digital evidence and receiving confirmation and signature from participants. However, evidence that is irrelevant to the alleged offense needs to be deleted even after seizure from the point of view of privacy. But the hash value is altered by deleting the irrelevant data from the image file, one will not be able to prove that the file is in the initial state when it was seized. Therefore, in this paper, a study was conducted to support the integrity of the digital evidence, even if some of the seized digital evidence was deleted or damaged during the seizure search. The hash value of each data is calculated and hash value of the combination of hash values are also calculated. Even if the unrelated evidence is deleted from the seized evidence regardless of file system such as FAT or NTFS, the suggested method presented a way to provide the integrity that proves there is no change in the evidence file.

• 한국측량학회지
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• 제17권3호
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• pp.213-223
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• 1999

부가가치가 큰 대규모 공공자료인 국가기본도 수치지도 자료기반의 고품질을 확보하고, 수치지도제작에서 발생할 수 있는 각종 오류들을 효율적으로 탐색할 수 있는 개선된 수치지도제작 모형을 구현하였다. 이를 위해 기존에 제작된 수치지도를 분석하고 수치지도 상에 포함될 수 있는 각종 오류를 대분류 자료층으로 구분하여 유형화하고, 유형화된 오류들을 탐색하기 위해 자동오류탐색 프로그램과 전산부호검사 프로그램을 개발하였으며, 순수육안탐색방법을 체계화하여 오류탐색방법에 따라 탐색 가능한 오류들을 범주화하였다. 수치지도제작 개선모형을 구현하기 위해 연구한 결과, 수치지도 제작과정에서 발생할 수 있는 각종 오류들이 체계적으로 탐색됨으로써, 수치지도 제작 공정별로 오류가 감소된 수치지도 자료기반의 구축이 가능하게 되었으며, 수치지도 자료기반의 오류가 최소화되어 품질이 향상됨을 확인할 수 있었다.

• 한국BIM학회 논문집
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• 제9권3호
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• pp.1-7
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• 2019

Digital twin technology has been actively developed to monitor and assess the current state of actual structures. The digital twin changes the traditional observation method performed in the field to the real-time observation and detection system using virtual online model. Thus, this study designed a digital twin model for a beam and examined the feasibility of the digital twin for bridges. To reflect the current state of the bridge, model updating was performed according to the field test data to construct an analysis model. Based on the constructed bridge analysis model, the relationship between strain and displacement was used to represent a virtual model that behaves in the same way as the actual structure. The strain and displacement relationship was expressed as a matrix derived using an approximate analytical theory. Then, displacements can be obtained using the measured data obtained from strain sensors installed on the bridge. The coordinates of the obtained displacements are used to construct a virtual digital model for the bridge. For verification, a beam was fabricated and tested to evaluate the digital twin model constructed in this study. The displacements obtained from the strain and displacement relationship agrees well with the actual displacements of the beam. In addition, the displacements obtained from the virtual model was visualized at the locations of the strain sensor.

• 정보보호학회논문지
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• 제20권6호
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• pp.23-32
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• 2010

IT 환경의 발전으로 일상생활에서의 임베디드 기기의 사용빈도가 증가하고 있다. 이러한 임베디드 기기중 대표적인 사무자동화기기인 디지털복합기는 복사기, 스캐너, 팩스, 파일서버 기능 등 다양한 용도로 사용되고 있다. 이러한 디지털복합기내에 스캔 등을 통하여 저장되어 있을 수 있는 데이터의 존재여부와 추출방법, 이를 이용한 증거자료로서의 활용방안에 대하여 논하여 보고자 한다.

• Current Optics and Photonics
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• 제4권6호
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• pp.483-499
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• 2020

In this paper, a novel analog signature scheme is proposed by modifying an RSA-based digital signature scheme with optical phase-shifting digital holography. The purpose of the proposed method is generating an analog signature to provide data confidentiality and security during the data transfer, compared to the digital signature. The holographic encryption technique applied to a hash value reveals an analog-type of pseudo-random pattern in the analog signature scheme. The public key and secret key needed to verify the analog signature are computed from public key ciphers which are generated by the same holographic encryption. The proposed analog signature scheme contains a kind of double encryption in the process of generating signature and key, which enhances security level more than the digital signature. The results of performance simulations show the feasibility of the highly secure signature scheme, and security analysis shows high robustness against known-message attacks and chosen-message attacks. In addition, the proposed method can apply to one-time signature schemes which can be used to sign only one message and it can also apply to authentication, e-mails, electronic banking and electronic data interchange.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권6호
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• pp.1935-1952
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• 2022

Consumer innovativeness plays a vital role in explaining consumer dynamics, such as adoption, usage, and behavioral intention, in the new world of disruptive online media. This empirical study aimed to examine the importance of consumer innovativeness and digital literacy in the adoption and expansion of new technology-based media services, focusing on OTT services. Extending the theory of adoption of new technologies by innovators to new media environment centered on OTT services, it examines the influence of the four dimensions of motivated consumer innovativeness on OTT service usage. The Korea Media Panel Data of 2019, where overall ICT usage and media consumption of a broad panel of respondents was collected, was used for the analysis. From the data of 10,864 respondents, 4,031 (37.1%) were found to have experience in using OTT services. To clarify the mediating effect of digital literacy on the correlations between cognitive innovativeness of consumers and their use of OTT services, Process Macro Model 4 was used. The bootstrap method was applied to reveal that all four dimensions of consumer innovativeness have a significant indirect effect on new media usage through digital literacy, thus indicating how digital literacy plays an important role in the spread of new digital services in addition to consumer innovativeness. The findings are important in that they can help in the efforts to introduce new technologies to the public and educate them to improve their digital literacy so that they can enjoy the complete experience of using these new digital products.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2001년도 춘계학술대회 논문집
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• pp.166-171
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• 2001

A digital seismic data acquisition and processing system using a PC has been developed in order to replace the analog data acquisition system of shallow marine seismic survey. An A/D converter that has 12bits of resolution and 225KHz of conversion rate was ued to acquire data, and a data acquisition software was developed as a Windows program which provides convenience of use. Raw data acquired at field has been saved to the hard-disk simultaneously. The signal to noise ratio, vertical and horizontal resolution could be improved by a digital data processing of the raw data. The digital processing of the raw data includss gain recovery, filtering, deconvolution, and muting. With the prediction deconvolution algorithm multiple reflections appearing on the shallow marine seismic section could be removed successfully.