• Geomechanics and Engineering
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• 제37권3호
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• pp.279-291
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• 2024

The "Korea Institute of Geoscience and Mineral (KIGAM) Quake" is a web-based open platform developed for publicly serving seismological data from 61 stations operated by KIGAM in Korea. The service provides meta-information related to observatory sites, sensors, and recorders necessary for utilizing the seismological data, as well as mainly observed continuous and strong-motion waveforms. The data is available through both the web and International Federation of Digital Seismograph Networks (FDSN) web services (open API), a unified data-providing interface in seismology. The platform aims to strengthen its open nature by offering a signal processing function for strong ground motions that can be controlled by user requests. The processed results can be downloaded in ASCII format, designed to meet the increased demands and accessibility in the earthquake engineering field. The platform also offers earthquake research information produced by KIGAM, such as recent major earthquake source information and academic annual report of earthquakes. Additionally, a site flat file was constructed for the geotechnical characteristics of 61 KIGAM station (KGNET) sites based on direct investigations and estimations.

• 로봇학회논문지
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• 제16권4호
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• pp.319-326
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• 2021

To improve the driving performance and work efficiency of the multi-purpose agricultural robot, this paper conducted a study on the turning and steering characteristics of the robot platform according to the characteristics of the working machine coupled to the multi-purpose agricultural robot considering the agricultural environment. First, the size and characteristics of the developed multi-purpose agricultural robot platform and working machine, and the targeted field farming work environment are analyzed. And based on this analysis, the problems that arise in multi-purpose robots with conventional turning methods are quantitatively presented. And to overcome this problem, an improved turning and steering method for multi-purpose agricultural robots is proposed considering the characteristics of various workstations and the agricultural working environment. Finally, by applying the proposed method, the turning characteristics of the multi-purpose agricultural robot according to the working machine are analyzed and the effectiveness of the proposed method is verified.

• 대한인간공학회지
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• 제19권2호
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• pp.47-61
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• 2000

To study the characteristic of the weight center control of humans, the tracking control capability of circular and wave motion by weight center movement was conducted by using the force platform. The control performance(the integrated value of the $|Object\;value(X)-Control\;Value(Y)|^{2}$) and control trace record was used to evaluate the individual performance characteristics. The size of the population for this study was 73, which consisted of engineering students, students majoring in taekwondo, students majoring in dance, all of which were in their twenties, and also people in their sixties. The results of this study indicate that the weight center control characteristics of humans can be represented by the evaluation method and values. People who were capable of tracking the object did not stop nor overshot the objective. In addition, habits or training characteristics and aging seemed to influence the performance of the subjects. In the future, development of different objectives for weight center control could be used to determine the severity of the disease of the subject and the effects of the treatment.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.896-899
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• 2005

In this research, we investigated the acoustical characteristics of the front yard of Injeongjeon hall at Changdeokgung Palace, a Korean traditional building which is on record as the world curtural inheritance of UNESCO. Acoustical measurements and computer simulation were fitted in order to judge the appropriateness of musical performances in the space. The front part of the stage area, where musicians will perform, is made of a stone platform. The eaves of Injeongjeon hall is located behind the platform.

• 전기학회논문지
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• 제61권10호
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• pp.1518-1523
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• 2012

In this study, the novel digital filtering algorithms are implemented to suppress the noisy characteristics embedded in ambulatory electrocardiogram signals by an android smartphone platform. With this aim, Graphical User Interface (GUI) is designed and implemented by utilizing multithread-Java programming to realize Finite Impulse Response and Infinite Impulse Response filter. With simulating our implemented digital filters built in an android smartphone, we can find the fact that we can efficiently suppresses the noisy characteristics due to baseline wandering and 60 Hz powerline source fluctuations especially in electrocardiograms.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 I
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• pp.318-321
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• 2003

In this paper, path loss and delay profile characteristics are measured in the subway platform. To evaluate the fading characteristics of the measured signals, the standard deviations are computed. The standard deviation is bigger for shorter distance. The shorter the distance, the bigger the phase difference between direct wave and reflected waves according the distance, which results in heavy fading. To compute the path loss according to distance, the average values of path loss exponent(n) is evaluated. The path loss exponents measured in the subway environment for Omni-VP(omni-directional vertical polarization) antenna and CP(circular polarization) antenna are 1.418 and 1.680, respectively, which are considerably less than 2.0, the free space path loss exponent.

• 디지털산업정보학회논문지
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• 제14권3호
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• pp.145-153
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• 2018

The purpose of this study is to seek ways how you can apply social responsibility requirements in accordance with the organizational characteristics of 'Dong' community service centers which are administrative service platform organizations, by applying the ISO 26000 to these centers. The ISO 26000, which is an international standard for social responsibility, defines the requirements for social responsibility which all organizations, regardless of their sizes or characteristics, can apply. This does not mean that all organizations must apply all the requirements regardless of their sizes or characteristics, but means that each organization can redefine the requirements applicable to its size and characteristics and apply them. Hence, this study defined 'Dong' community service centers' organizational characteristics and stakeholders and assessed the suitability of 251 categories in the ISO 26000 requirements by using the Delphi technique. Through this assessment process, 135 categories were selected. Then, after conducting an importance test by experts, 83 social responsibility assessment indicators applicable to 'Dong' community service centers were developed.

• 대한치과보철학회지
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• 제41권5호
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• pp.674-688
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• 2003

Statement of Problem : With increasing demand of the implant-supported prosthesis, it is advantageous to use the different platform width of the fixture according to bone quantity and quality of the patients. Purpose : The purpose of this study was to assess the loading distributing characteristics of two implant designs according to each platform width of fixture, under vertical and inclined loading using finite element analysis. Material and method : The two kinds of finite element models were designed according to each platform width of future (4.1mm restorative component x 11.5mm length, 5.0mm wide-diameter restorative component x 11.5mm length). The crown for mandibular first molar was made using UCLA abutment. Each three-dimensional finite element model was created with the physical properties of the implant and surrounding bone. This study simulated loads of 200N at the central fossa in a vertical direction, 200N at the outside point of the central fossa with resin filling into screw hole in a vertical direction and 200N at the buccal cusp in a 300 transverse direction individually Von Mises stresses were recorded and compared in the supporting bone, fixture, and abutment screw. Results : The stresses were concentrated mainly at the cortex in both vertical and oblique load ing but the stresses in the cancellous bone were low in both vertical and oblique loading. Bending moments resulting from non-axial loading of dental implants caused stress concentrations on cortical bone. The magnitude of the stress was greater with the oblique loading. Increasing the platform width of the implant fixture decreased the stress in the supporting bone, future and abutment screw. Increased the platform width of fixture decreased the stress in the crown and platform. Conclusion : Conclusively, this investigation provides evidence that the platform width of the implant fixture directly affects periimplant stress. By increasing the platform width of the implant fixture, it showed tendency to decreased the supporting bone, future and screw. But, further clinical studies are necessary to determine the ideal protocol for the successful placement of wide platform implants.

• 전기학회논문지P
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• 제62권2호
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• pp.57-64
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• 2013

Many accidents are being occurred due to many missteps, etc. at the railway platform. Recently in Korea, efforts to prevent casualties fundamentally are being made by installing and operating the PSD(Platform Screen Door) with underground station building as its center to prevent these casualties of passengers. Although this PSD can solve the problem of public casualties at platform fundamentally, it is impossible to install it at whole station buildings since its installation cost is high, and in case of the ground station building of general railway whose operation speed is higher, installation of PSD is impossible due to the characteristics of railway system. This paper proposes the novel safety equipment using Laser radar sensors for the prevention against casualties of passengers at station buildings where the PSDs are not installed like this. The safety equipment using Laser radar sensors is the safety equipment making an approaching train stopped if the falling object is a person by detecting the obstacle at platform through, and it has the merit possible to apply it to station buildings not only in the underground section but also in the ground section since it may detect accurately under ambient environmental elements such as the snow, rain and yellow dust, etc. also. We developed the prototype of the safety equipment to reduce public casualties at platform by using Laser radar sensors and carried out its performance test, and the result is presented in this paper.

• 한국언론정보학보
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• 제65권
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• pp.76-92
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• 2014

이 논문에서는 인터넷 서비스 플랫폼을 '장치'개념을 통해 접근한다. 현대정보자본주의는 수많은 장치의 증식과 축적을 통해 발전한다. 반대로 현대정보자본주의의 서비스 플랫폼은 가치를 증식하고 축적하는 장치이기도하다. 특히 구글, 페이스북, 네이버 등 거대 서비스 업체의 플랫폼 장치들은 인지자본주의의 증식과 축적을 담당한다. 서비스 플랫폼 제공자들은 이용자 활동 결과물을 수집 흡수하는 동시에 추적 포획한다. 이 논문에서는 인터넷 서비스 플랫폼을 하나의 장치(dispositif)로 볼 수 있는가에 대해 푸코, 들뢰즈, 아감벤의 '장치' 개념을 통해 검토해보고, 이를 활용하여 인터넷 서비스 플랫폼의 성격과 기제를 해명할 수 있는가를 살펴볼 것이다. 이를 위하여 이 논문에서는 푸코, 들뢰즈와 아감벤의 장치론을 살펴보고, 인터넷 서비스 플랫폼을 이용자서비스 장치와 이용자 활동의 수집포획장치가 하나로 통일된 장치로 보는 시각을 제시하였다. 이러한 연구의 목적은 인지자본주의의 축적이 이루어지는 사회적 공장으로서의 SNS 서비스 플랫폼 분석을 위한 개념을 도출해내고, 이를 구글이나 페이스북 등 구체적인 서비스 플랫폼에 적용함으로써 향후 이에 대한 비판적인 논의의 출발점을 마련하는 데 있다.