• Publications of The Korean Astronomical Society
• /
• v.11 no.1
• /
• pp.231-242
• /
• 1996

We made 250 kHz filter bank based on FBS250 model designed by Millitech. It consists of 256 channels centered at 1391 MHz. The minimum detectable input level is -56 dBm/channel, and the maximum continuous integration time is about 1.3 seconds. This spectrometer can be operated in parallel or series mode with other spectrometers.

• Journal of information and communication convergence engineering
• /
• v.1 no.1
• /
• pp.39-43
• /
• 2003

The technology required to advance the state of the art of ultra-high-intensity excimer amplifier construction to the 100 J/100fs output pulse level is identified. The preliminary design work for very large final amplifier pumped by electron beam module is described, and key design problems and approaches are presented and discussed in detail based on the recent experimental and theoretical results.

• Journal of information and communication convergence engineering
• /
• v.3 no.1
• /
• pp.9-12
• /
• 2005

In this research, we developed a ubiquitous computing platform that can analyze the vibration and noise in wireless environment by wireless LAN and sensors. In order to utilize the COTS(Commercial Off The Shelf) concept, we used a PDA that supports wireless LAN and serial communication as a main board. Following platform is used to measure the noise level of heavy construction equipments in a remote area.

• Communications for Statistical Applications and Methods
• /
• v.17 no.3
• /
• pp.309-318
• /
• 2010

The construction of asymptotic confidence intervals is considered for the difference of binomial proportions in two doubly sampled data subject to false-positive error. The coverage behaviors of several likelihood based confidence intervals and a Bayesian confidence interval are examined. It is shown that a hierarchical Bayesian approach gives a confidence interval with good frequentist properties. Confidence interval based on the Rao score is also shown to have good performance in terms of coverage probability. However, the Wald confidence interval covers true value less often than nominal level.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2000.11a
• /
• pp.170-175
• /
• 2000

Vibration and vibration-induced noise, major sources of occupant complaint, are increasing in modern buildings, Lighter weight construction and equipment located in penthouses or intermediate level mechanical rooms increase structure-bone vibration and noise transmission. In this paper discusses about testing vibration isolation systems and about the effectness of floor flexibility for vibration transmission.

• Proceedings of the KSR Conference
• /
• 1998.11a
• /
• pp.353-360
• /
• 1998

SONICS is the software developed by authors. The program provides the noise level in outdoors due to various noise source types : construction machines including blast sources, railroad vehicles and automobiles. It operates in the Windows system. Since the software is compiled by using Visual C++ 4.0, users can un the program interactively. Also SONICS uses Windows dialog-box and choice-button so that a novice user can easily implement the program for the enviromental noise planning.

• Educational Technology International
• /
• v.6 no.1
• /
• pp.121-137
• /
• 2005

In today's information-rich society, the need for information literacy has urgency. Three tasks of information processing are filtering, meaning-matching, meaning-construction that could be strengthened through inquiry-based learning. The cycles of reflection and practice develop the habit of mind, or conscious information processing that allow the learners to acquire higher level of information literacy. An on-line inquiry-based learning environment designed for information literacy may help learners to perform their lifelong learning better with the ability to appreciate, locate, evaluate, and use information effectively.

• Proceedings of the Korean Society of Disaster Information Conference
• /
• 2022.10a
• /
• pp.241-242
• /
• 2022

산업안전보건 관계법령의 강화와 중대재해처벌법의 시행으로 기존의 안전보건기준의 준수 개념에서 안전보건관리체계 구축으로 대한민국의 안전보건 패러다임이 바뀌었지만 안전보건경영시스템에 대한 접근은 인증항목별 구축의 관점에서만 접근이 이루어지고 실질적으로 시스템을 운영하는 사람을 중심으로한 접근은 미약하여 안전보건경영시스템 인증항목을 세부지표로 개발하여 본사와 현장 조직구성원들에게 설문을 통한 성과측정으로 건설관리자들의 안전보건경영시스템에 대한 인식수준을 파악하고자 함.

• Korean Institute of Interior Design Journal
• /
• v.20 no.6
• /
• pp.244-253
• /
• 2011

Due to the development of modern society, desire for residence is not merely for the purpose of habitation. It's also used to represent the joy of living, the resident's emotional expressions, and social status. In order to express such desires, one of the most important factors used to portray them visually is the usage of color. When apartments are constructed, model houses are created to show potential tenants a sample house. The color scheme of those sample houses have been changed in accordance to the transition in the eras. Since 2000, construction companies have created their own apartment brand in order to create their own signature image. To achieve this signature image, one can alter the surface level and use other materials, and colors. I have researched the usage of colors out of the above. The criteria that need to be fulfilled to be a subject for my research are in the top 5 construction companies of the year 2010, within the metropolitan area, and open after 2009. As the result, all construction companies used colors Y and YR. An as accent colors on props such furniture and curtains, they used colors P, PB, and R. They were differences in color tones in each construction company and as the square footage increase, they used color contrasts. Hillstate and Raemian used darker shades in the larger houses. But the color tones YR and Y were used in all houses regardless of their size. E-world, Xi, and Prugio showed differences in shade and tone of colors regardless of size but rather depending on the locations of the apartments.

• Journal of The Korean Society of Agricultural Engineers
• /
• v.58 no.4
• /
• pp.47-55
• /
• 2016

This study is on the stability re-evaluation of armor stones in saemangum seadike according to recently increased sea-level and frequent high wave incoming and the results are in the following. The field inspection of armor stones in the seadike revealed that damages of armor stones have been caused by higher waves than designed waves and that the reconstruction of armor stones and concrete grouting method have been used as the reinforcement work. The result of numerical simulation of wave channel conducted to estimate the safety weight of armor stones influenced by flows revealed that the safety weight of armor stones in the seadike No.4 was estimated as 5.47 tons by using the Isbash method, which is about 122 % more than 4.49 tons estimated by using Van der Meer method. Therefore, in designing armor stones which can be influenced by high waves such as the case of Saemangum seadike, it is necessary to apply the safety weight method of armor stones, based on the Isbash method, which produced the significant figures among the safety weight methods using flows as well as the safety weight method using high waves based on the Hudson method.