• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2006년도 추계학술대회 학술발표 논문집 제16권 제2호
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• pp.293-296
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• 2006

This paper presents new sufficient conditions to an intelligent digital redesign (IDR). The purpose of the IDR is to effectively convert an existing continuous-time fuzzy controller to an equivalent sampled-data fuzzy controller in the sense of the state-matching. The state-matching error between the closed-loop trajectories is carefully analyzed using the integral quadratic functional approach. The problem of designing the sampled-data fuzzy controller to minimize the state-matching error as well as to guarantee the stability is formulated and solved as the convex optimization problem with linear matrix inequality (LMI) constraints.

• 한국BIM학회 논문집
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• 제10권4호
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• pp.40-49
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• 2020

This report describes the development of a program that can be linked to an alignment and extracts related information using a prefab structured digital engineering model. The subject bridge was set as a straight alignment, the Superstructure type as Precast girder and the Substructure type as Precast pier and Cast-in-situ Abutment. We identified the variables required to create a digital engineering model and reviewed them to create the digital engineering model by entering them as numerical values in the program. In addition, it is configured so that the variables linked to the alignment can be entered numerically. The quantity takeoff can be calculated when the design is complete. The purpose of the program development presented in this report is to enable the designers to select the optimal alternative by designing a bridge that best fits their current situation, extracting the relevant information and then by providing it to the manufacturer and construction company.

• 한국안전학회지
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• 제37권5호
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• pp.14-21
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• 2022

The purpose of this study was to apply the signal pattern recognition technique to the digital wireless fire-alarm system and to reduce unwanted fire alarms. In this study, the fire alarms of the K Institute, which operates the largest digital wireless fire-alarm system in Korea, were classified into normal operations and unwanted fire alarms, and these were analyzed and compared with actual fire signals. In addition, by designing a non-fire signal filter and applying it to the K Institute, we confirmed that the monthly unwanted fire alarm rate of all 5,713 detectors decreased sharply. In particular, the unwanted fire alarm rate for flame decreased from 1.09% to 0.11% and the unwanted fire alarm rate for smoke decreased from 0.65% to 0.035%.

• International Journal of Advanced Culture Technology
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• 제12권3호
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• pp.278-283
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• 2024

As the introductory content of televison series, the opening titles are crucial for helping the audience quickly grasp the tone of the narrative. With the continuous integration of the televison production industry and digital computer technology, motion graphics, featuring its unique dynamic graphic design, offers new avenues for title sequence creation. This paper dives into the application of motion graphics in the title sequences of noir genre television series, analyzing aspects such as visual style, content presentation, and narrative expression. By comparing early static text title sequences with motion graphics ones, this paper reveals the advantages of motion graphics in designing opening titles for noir genre television series and examines how it enhances visual impact and improves audience experience. This study not only enriches the creative techniques for title sequence design, but also provides valuable insights for future creations.

• 한국정밀공학회지
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• 제31권7호
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• pp.569-576
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• 2014

Sensor node means a device to include sensor, amplifier, and data acquisition (DAQ) equipment. The sensor converts physical signals to electric signals and weak signals from the sensor can be amplified through the amplifier. DAQ equipment converts analog signal to digital signal and collects converted digital signal. Since the sensor node is sensitive to the environment so that selection of mounting position and fixture design of sensor are applied differently depending on the characteristics of a target. This study is about designing and manufacturing sensor node to be used in a machine tool. The environment of machine tool is very severe due to noise, temperature fluctuation, and dust, etc. Hence, the sensor and amplifier must be designed and manufactured by considering the environmental issues. The designed and manufactured sensor node was tested for the reliability and effectiveness of the developed sensor nodes in the study.

• 디지털콘텐츠학회 논문지
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• 제9권4호
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• pp.751-758
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• 2008

본 논문은 3D 그래픽 기술을 활용하여 사용자의 실제 모습과 같은 3D 얼굴 모델을 구현하고, 구현된 얼굴 모델을 활용하여 성형 시술 전과 후를 가상으로 비교함으로 성형수혜자의 만족도를 높이는 응용프로그램인 3D 가상 얼굴 성형 시스템에 대한 연구 및 구현이다. 사용자의 실물과 최대한 유사한 원형 3D 얼굴 모델링 제작을 위한 3D 모델링 기법과 피부를 표현하는 맵핑 기법, 그리고 데이터베이스 시스템을 사용한 얼굴 데이터의 저장 및 사용자 맞춤 가이드 시스템을 구현한다. 또한, 세부적인 미세 조정을 위한 변형 Controller를 구현하여 얼굴의 미세한 변화를 나타낼 수 있다. 본 논문에서 구현한 3D 얼굴 성형 시스템은 성형외과 등에서 사용되고 있는 이미지를 활용한 시스템에 비하여 정확성, 편리성, 만족도가 높은 결과를 보여주고 있다.

• 디지털산업정보학회논문지
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• 제16권3호
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• pp.83-94
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• 2020

The threat of COVID-19 pandemic put many universities in Korea to develop and implement various types of untact online classes. Online education has been recognized as one of the effective educational methods because of its ubiquitous and flexible educational environments. However quick move to online education caused by the sudden attack of the COVID-19 led to many problems such as faculty's burden and stress from the planning and designing suitable for online classes, technology system problems for both students and faculty and students' complaints of the low quality of education. The primary purpose of this study is to investigate the effects of learner, contents, and instructor factors on college student satisfaction with untact online classes during the first attack of COVID-19 pandemic. The data were collected from 605 undergraduate students of S women's university based in Seoul, who took the untact online classes in the spring semester 2020. The results of empirical analysis reveal that only contents factor are likely to predict learner satisfaction. These findings provide insights that the effective planning and designing classes are key to enhancing learner satisfaction with online education. This study suggests that instructors need various contents developed and educational strategies for students.

• 디지털산업정보학회논문지
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• 제7권3호
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• pp.97-105
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• 2011

With the advancement of network, privacy information as well as confidential information that belongs to government and company are exposed to security incident like spreading viruses or DDoS attack. To prevent these security incident and protect information that belongs to government and company, Security system has developed such as antivirus, firewall, IPS, VPN, and other network security system. Network security systems should be selected based on purpose, usage and cost. Verification for network security product's basic features performed in a variety of ways at home and abroad, but consumers who buy these network security product, just rely on the information presented at companies. Therefore, common user doing self performance evaluation for perform Verification before buying network security product but these verification depends on inaccurate data which based on some user's criteria. On this paper, we designing methodology of network security system performance evaluation focused on Korean using other cases of performance evaluation.

• Journal of electromagnetic engineering and science
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• 제14권4호
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• pp.411-414
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• 2014

A switch is one of the most useful circuits for controlling the path of signal transmission. It can be added to digital circuits to create a kind of gate-level device and it can also save information into memory. In RF subsystems, a switch is used in a different way than its general role in digital circuits. The most important characteristic to consider when designing an RF switch is keeping the isolation as high as possible while also keeping insertion loss as low as possible. For high isolation, we propose leakage signal cancellation and inductive switching for designing a singlepole double-throw (SPDT) RF switch. By using the proposed method, an isolation level of more than 23 dB can be achieved. Furthermore, the heterojunction bipolar transistor (HBT) process is used in the RF switch design to keep the insertion loss low. It is demonstrated that the proposed RF switch has an insertion loss of less than 2 dB. The RF switch operates from 1 to 8 GHz based on the $0.18-{\mu}m$ SiGe HBT process, taking up an area of $0.3mm^2$.

• 디지털산업정보학회논문지
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• 제19권2호
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• pp.47-55
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• 2023

Recently, Sensor technologies are emerging to prevent traffic accidents and support safe driving in complex environments where human perception may be limited. The UWS is a technology that uses an ultrasonic sensor to detect objects at short distances. While it has the advantage of being simple to use, it also has the disadvantage of having a limited detection distance. The LDWS, on the other hand, is a technology that uses front image processing to detect lane departure and ensure the safety of the driving path. However, it may not be sufficient for determining the driving environment around the vehicle. To overcome these limitations, a system that utilizes FMCW radar is being used. The BSD radar system using FMCW continuously emits signals while driving, and the emitted signals bounce off nearby objects and return to the radar. The key technologies involved in designing the BSD radar system are tracking algorithms for detecting the surrounding situation of the vehicle. This paper presents a tracking algorithm for designing a BSD radar system, while explaining the principles of FMCW radar technology and signal types. Additionally, this paper presents the target tracking procedure and target filter to design an accurate tracking system and performance is verified through simulation.