• 한국측량학회:학술대회논문집
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• 한국측량학회 2010년 춘계학술발표회 논문집
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• pp.367-369
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• 2010

The purpose of this study is to develop a campus facility management system, construct 3D graphic data and attribute data of facilities on the Kumoh National Institute of Technology and then verificate the developed system's practicability. Utilized the existing campus facility data from the existing drawings, images, cadastre records and so forth, 3D position data of underground facilities surveyed with a total station and high-resolution aerial photos, 3D realistic models were produced by means of a XD2D software and a XDWORLD Builder Professional software of GIS engines. We intend to embody not only campus guide service in virtual reality space but visualization of 3D virtual campus by providing 2D and 3D data to web space using XDWORLD server soon after. It is expected that the campus facility management system is able to contribute to the integrated management of 3D facility data service, the support of prompt decision-making related to spatial affairs, the work simplification through data holding in common between the members of the staff and so forth.

• JSTS:Journal of Semiconductor Technology and Science
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• 제15권3호
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• pp.404-416
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• 2015

Small-area, low-power coarse and fine frequency detectors (FDs) are proposed for an adaptive bandwidth referenceless CDR with a wide range of input data rate. The coarse FD implemented with two flip-flops eliminates harmonic locking as long as the initial frequency of the CDR is lower than the target frequency. The fine FD samples the incoming input data by using half-rate four phase clocks, while the conventional rotational FD samples the full-rate clock signal by the incoming input data. The fine FD uses only a half number of flip-flops compared to the rotational FD by sharing the sampling and retiming circuitry with PLL. The proposed CDR chip in a 65-nm CMOS process satisfies the jitter tolerance specifications of both USB 3.0 and USB 3.1. The proposed CDR works in the range of input data rate; 2 Gb/s ~ 8 Gb/s at 1.2 V, 4 Gb/s ~ 11 Gb/s at 1.5 V. It consumes 26 mW at 5 Gb/s and 1.2 V, and 41 mW at 10 Gb/s and 1.5 V. The measured phase noise was -97.76 dBc/Hz at the 1 MHz frequency offset from the center frequency of 2.5 GHz. The measured rms jitter was 5.0 ps at 5 Gb/s and 4.5 ps at 10 Gb/s.

• 한국의상디자인학회지
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• 제25권4호
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• pp.147-161
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• 2023

This study used 3D anthropometric data from the 8th Size Korea to type and analyze whole body shapes of obese women in their 20s and 30s, and constructed dimensional data for human body items needed to create a 3D human body model for each type. The data analysis used data from 148 obese women in their 20s and 30s, and a total of 48 index values, drop values, and angle items were subjected to factor analysis and one-way variance analysis to categorize body types and verify significant differences by type. As a result of the factor analysis, 12 factors were extracted and divided into 4 body types. Type 1 is a 'standard type with a curved torso with balanced upper and lower body lengths', Type 2 is a 'bending forward type with a short, thick lower body, and an uncurved torso', Type 3 is a 'lean back type with a long and thin lower body and an H-shape torso', Type 4 is a 'sway back type with a long and thick lower body and abdominal obesity'. The representative body type of obese women in their 20s and 30s was identified as Type 1. The constructed body shape information will be used as basic data for future 3D human body modeling.

• 한국정보통신학회논문지
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• 제15권3호
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• pp.639-644
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• 2011

초고속 정보 통신망의 발달로, 현재 데이터 통신시스템은 가입자 상호간에 데이터를 빠르고, 정확하게 교환 할 수 있도록 하였다. 본 논문에서는 통신 시스템에 사용되는 여러 가지 Logic중 가장 기초가 되는 LVTTL(Low Voltage Transistor Transistor Logic)을 이용하여 데이터 전송특성 분석을 위한 시스템을 설계하고 데이터 전송속도의 변화따른 LVTTL의 특성을 측정 분석하였다. 현재 시스템에 필요한 전송 라인의 길이가 30cm이기 때문에, 우리는 현재 시스템에 필요한 전송 라인의 길이에 따라 LVTTL 데이터 전송 특성을 분석했다. LVTTL의 신호 레벨은 10Mbps일 경우 3V, 50Mbps일 경우 2.2V, 100Mbps일 경우 2V, 125Mbps일 경우 1.5V, 150Mbps일 경우 1.4V이다. 전송선로의 길이가 30cm, 데이터 전송속도 100Mbps까지 안정하게 보냄을 알 수 있었다.

• 보건의료산업학회지
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• 제6권3호
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• pp.209-218
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• 2012

The purpose of this study was to provide the effective pain management care for post operative patients through understanding patient's knowledge and attitude about pain-management. The data was collected by distributing structured questionnaires to 200 inpatients in 2 secondary hospitals located in Ulsan, beginning June 28, 2010 to August 11, 2010, and analyzed by t-test, ANOVA, Pearson correlation coefficient. The level of Knowledge about pain management postperations was $6.44{\pm}2.03$. The level of attitude about pain management postperations was $6.92{\pm}1.78$. The significant differences were founded within the inpatient's knowledge about pain management according to the inpatient's demographic data:Age(F=5.55, p=.01), Marital status(t=-2.17, p=.03). The significant differences were founded within the inpatient's attitude about pain management according to the inpatient's demographic data:Job(F=3.45, p=.03). Developing educational material and guidebooks is needed to form more positive about pain-control after operations. This study researched only inpatient's knowledge and attitude about pain-management, but researching nurses, doctors, inpatients and family member's knowledge and attitude should be included in following studies.

• 한국전산유체공학회지
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• 제11권2호
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• pp.56-61
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• 2006

As the size and dimension of target problems in the field of computational engineering including CFD gets bigger and higher, it is needed to have more efficient and flexible data visualization environment in terms of software and hardware. Even though it is still manageable to use a mouse in controlling 3-dimensional data visualization, it would be beneficial to use 3-D input device for 3-D visualization. 'Data Glove' is one of the best 3-D input devices, because human hands are best tools for understanding 3-D space and manipulating 3-D objects. Signals coming from 'Data Glove' are analog and very sensitive to finger motions, therefore signal filtering using a digital filter is applied. This paper describes our experience and benefits of using data gloves in controlling 3-dimensional postprocessing softwares.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.148-151
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• 2005

This paper proposes a high speed interface using redundant multi-valued logic for high speed communication ICs. This circuit is composed of encoding circuit that serial binary data are received and converted into parallel redundant multi-valued data, and decoding circuit that convert redundant multi-valued data to parallel binary data. Because of the multi-valued data conversion, this circuit makes it possible to achieve higher operating speeds than that of a conventional binary logic. Using this logic, a 1:4 demultiplexer (DEMUX, serial-parallel converter) IC was designed using a 0.35${\mu}m$ standard CMOS Process. Proposed demultiplexer is achieved an operating speed of 3Gb/s with a supply voltage of 3.3V and with power consumption of 48mW. Designed circuit is limited by maximum operating frequency of process. Therefore, this circuit is to achieve CMOS communication ICs with an operating speed greater than 3Gb/s in submicron process of high of operating frequency.

• 한국IT서비스학회지
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• 제10권1호
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• pp.65-72
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• 2011

In this paper, we consist of three dimensional acceleration sensor as a small-sized sensor module to acquire base technologies that need to estimate exhibition audience' moving distance. and that we developed algorism and device that can calculate acceleration in gravity direction with attaching it to people's body part without regard to three dimensional direction. By making use of the sensor module, we have to process the data that let it quantitatively process possible to measure people's walk and movement by computer system. We normalized sensor output data in the process of change from sensor module to acquisition of data, rectangular coordinates and single scalar acceleration value in gravity direction. Printed out sensor data attaching sensor module to people's body part is used for motion pattern detection after normalization, Motion sensor devised mode change algorism because it print data of other pattern according to attached position of body. For algorism design, we collected data occurring during walking about subject and we also defined occurring problem domain after analyzing the data. We settle defined problem domain and that we simulated the walking number measuring instrument with highly efficient in restricted environment.

• 대한공간정보학회지
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• 제22권3호
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• pp.137-143
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• 2014

최근 정부는 정부3.0이라는 새로운 정부운영의 패러다임으로 공공데이터를 적극적으로 개방하고 공유하는 정책을 펼치고 있다. 이와 함께 국토교통부에서는 국가공간정보 및 3차원건물, 영상지도를 포함한 다양한 콘텐츠를 일반인에게 제공하는 공간정보 오픈플랫폼 통합지도서비스(이하 브이월드)를 운영하고 있다. W3C재단의 오픈데이터 현황 보고서(2013)의 평가결과 우리나라는 정부의 정책적 지원 및 계획 부분에서는 긍정적인 결과를 나타낸 반면 데이터 관리 분야에서 취약하여 이에 대한 품질개선이 필요한 실정이다. 또한, 3차원 공간정보 객체 데이터(이하 3차원 모델)의 경우 데이터 구축에 활용한 디지털항공사진영상의 최신성이 부족하여 데이터의 현행화가 필요하다. 이에 본 논문에서는 3차원 모델의 품질요소인 수직위치 정확도에 대해 공공데이터이며, 실측 데이터인 건축물 대장의 높이 데이터를 기준으로 국내표준 품질평가 기법을 적용하여 데이터 품질을 측정하고, 측정오차에 대한 원인을 분석하여 공공데이터를 활용한 3차원 모델의 수직위치 정확도 향상 및 최신성의 유지 가능성을 제시하고자 한다. 연구 수행 결과 건축물대장의 높이 값을 품질평가 기준으로 적용하였을 경우 수직위치 정확도가 향상되는 것을 확인하였으며, 건축물 대장의 재건축, 증축 정보를 활용할 경우 3차원 모델의 최신성의 유지를 할 수 있음을 확인하였다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2001년도 가을 학술발표논문집 Vol.28 No.2 (1)
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• pp.166-168
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• 2001

3D GIS(Geographical Information System)은 2D GIS를 고도값을 고려한 3D 공간으로 확장한 GIS System이다. 3D GIS는 기존의 2D와는 다른 Data Format을 기반으로 훨씬 다양한 기능을 지원하는 Operation들을 제공한다. 본문에서는 각 노드들의 상관 관계를 묘사하는 데 장점을 가진 Topological Data Model에 대해 알아보고, 이 모델에서 지원이 가능한 여러 가지의 3D Operation들을 알아보고 도시내의 다양한 상황하에서 기능을 지원 할 수 있도록 한다.