• International Journal of Internet, Broadcasting and Communication
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• 제8권2호
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• pp.23-30
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• 2016

In this paper, for the pratical building envoronments, the propagation properties of the electromagnetic waves of the sub-1GHz bands, including the 447MHz, 868MHz, and 715MHz, and the 2.4GHz band are experimentally observed in therms of the received signal strength indicator (RSSI) value. The compasion of the frequency bands can be utilized to efficiently construct the wireless sensor networks (WSN) for the building automation control. In order to measure the RSSI values in the building, an RSSI measurement system is first designed, in which the master part can transmit data packets and measure the corresponding RSSI values, and the slave part can respond the received data packets. Using the measurement system, the RSSI values are then experimentally measured at four types of building enviroments. From the experimental result analysis, we could notice that the sub-1GHz, especially the 447MHz band, showd a good communication performance for the building environment and could provide an efficient WSN construction when the data rate is relatively low.

• BMB Reports
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• 제46권12호
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• pp.600-605
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• 2013

Interplay between calcium ions ($Ca^{2+}$) and reactive oxygen species (ROS) delicately controls diverse pathophysiological functions of vascular smooth muscle cells (VSMCs). However, details of the $Ca^{2+}$ and ROS signaling network have been hindered by the absence of a method for dual measurement of $Ca^{2+}$ and ROS. Here, a real-time monitoring system for $Ca^{2+}$ and ROS was established using a genetically encoded hydrogen peroxide indicator, HyPer, and a ratiometric $Ca^{2+}$ indicator, fura-2. For the simultaneous detection of fura-2 and HyPer signals, 540 nm emission filter and 500 nm~ dichroic beamsplitter were combined with conventional exciters. The wide excitation spectrum of HyPer resulted in marginal cross-contamination with fura-2 signal. However, physiological $Ca^{2+}$ transient and hydrogen peroxide were practically measurable in HyPer-expressing, fura-2-loaded VSMCs. Indeed, distinct $Ca^{2+}$ and ROS signals could be successfully detected in serotonin-stimulated VSMCs. The system established in this study is applicable to studies of crosstalk between $Ca^{2+}$ and ROS.

• 보건행정학회지
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• 제15권4호
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• pp.26-45
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• 2005

The purposes of this study were to Identify the .level of measurement on quality Indicators and evaluate the existing indicators in order to determine the priority of quality indicators' application in Korean general hospitals. A survey was conducted using a questionnaire. The subjects were quality managers working at general hospital having over 300 beds. The criteria were relevance, reliability, precision, impact, application, and preference to evaluate quality indicators. According to these six criteria, each indicator was evaluated on a five point scale(5: excellent, 1: poor). The response rate was $40.4\%$. The hospitals have monitored the average of 3.8 indicators(median 4). The indicators such as return to operating room, unplanned readmission, cancellation of booked operations, death, hospital infection, cesarean section rate, volume per disease or procedure, readmission, re-operation, blood transfusion, and post-procedural complications were frequently measured. The top ten quality indicators in the evaluation by its relevance, validity, reliability, impact, preference and application were decubitus ulcer, clean wound infection, fall, unplanned return to operation room, transfusion reactions, foreign body left In during procedure, unplanned readmission, wound infection after contaminated surgery, postoperative hemorrhage/hematoma, and cesarean section rate in order. The high priority quality indicators frequently measured could be used as primary national indicators. Standardized guidelines about monitoring indicators and the utilization will preliminarily be needed to compare and reuse the data for various purposes and improve the quality of care continuously.

• Journal of Ginseng Research
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• 제9권2호
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• pp.154-162
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• 1985

We report a newassay method on the measurement of the catalase activity, whose utilzation value is considered to be remarkable in the field of plant biochemistry. We named this method as a De-Coupling method. The essence of de-coupling method is the separation between the enzyme reaction and the indicator reaction. The optimum condition of the enzyme reaction was found to be following: on addition of 1 ml of substrate (H2O2: 20mM) to the fixture of the crude extract of enzyme (volume: 0.2 ml) and the ammonium phosphate buffer (volume: 1.8 ml; 0.93 M phosphate, 1.6M NHB, 2.5 M methanol, pH 7.0). After 30, 60 and 90 seconds of the enzyme reactions are proceeded, the reactions are terminated by 25% of tai-chloro-acetate (final concentration of 5%), respectively. The precipitated materials by tai-chloro-acetate was removed by the centrifugation (2000g, 10minutes). Formaldehyde produced in the enzymatic reaction was reacted with 2ml of acetylacetone (60mM). The indicator reaction -(HANTSCH REAKT10N)- in which lutidine is formed, was proceeded for 60 minutes at $25^{\circ}C$.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.947-952
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• 2007

건설 프로젝트는 개별공종으로 구성되며 개별공종은 개별작업으로 이루어지므로 개별작업의 성과는 프로젝트 성과에 영향을 주는 최소단위이다. 그러므로 개별 작업에 대한 체계적인 성과측정 및 평가가 이루어져야 한다. 그러나 기존 성과측정은 기업 또는 프로젝트 단위에서 성과측정만 주로 이루어지고 있고 개별 작업을 측정하는 국내 ${\cdot}$ 외 공사관리체계에서는 지표에 대한 분석 및 활용이 미흡하다. 따라서 본 연구에서는 개별 작업을 측정하기 위해 PPC(Percent Plan Complete)를 성과지표로 선정하였고 통계적 분석 방법을 통해 목표지향적인 작업관리와 지속적인 개선이 이루어 질 수 있도록 지표의 분석 방법을 제안하였다.

• International Journal of Computer Science & Network Security
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• 제22권10호
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• pp.91-96
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• 2022

Article materials reflect the results of scientific research and generalization of experience concerning quality measurement of student's educational activities in the context of innovative development of the educational process, which is ensured by introducing educational innovations. The main point of monitoring of higher education students' activities and also phenomenon of education quality, particularly its results, are determined in the research. Guided by the scientific theory and personal experience of scientific and pedagogical activities, the attempt to single out the key components, important indicators and to introduce component indicator model of quality of higher education students' activities on the qualimetry base has been performed. Methodical solutions concerning the application of the developed model to determine the dynamics of pedagogical students' educational achievements by particular educational components in the process of innovative development of educational process are proposed. The advanced studies that relate to the development of methods for monitoring the quality of pedagogical higher education students' activities on the basis of systemic, competence and qualimetry approaches taking into account the levels of education and chosen specialties have been decided.

• 대한기계학회논문집B
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• 제24권4호
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• pp.599-607
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• 2000

In this study, experiments have been performed to examine the effects of background gray-level on the depth-of-field and on the in-focus criteria. The normalized value of contrast(VC) and the gradient indicator(GI) were used as the in-focus criteria for the small and the large size-ranges of particles, respectively. The slightly larger number of pixels were detected with the brighter background. The maximum of the normalized value of contrast(VCmax) is decreased with the brighter background and its deviation from that with the background gray-level of 160 turned out to be about $pm$15% when the background gray-level changes from 100 to 200. However, the maximum gradient indicator(GImax) changes with the background gray-level within only $pm$5%. The depth-of-field for the VC-applicable particle-size range is largely dependent on the background gray-level. On the other hand, the depth-of-field for the GI-applicable particle-size range changes only slightly with the background gray-level. To keep the normalized standard deviation of the particle size within 0.1, the background gray-level should be set 160$pm$20 for both the VC-applicable and GI-applicable ranges which cover the particle size between $10{\mu}m$ and $300{\mu}m$.

• 한국정밀공학회지
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• 제11권1호
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• pp.63-70
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• 1994

This paper presents manufacturing and evaluation of a non-contact rotational torque measurement system which consists of torque cell, telemeter system, transmitter and receiver coil, transmitter, receiver and telemeter indicator. Static calibration test results show that the system has a maximum uncertaintry of 05% or less. A standar calibration system for rotational torque is used to evaluate the measurement system, As a result, the maximum uncertainty for measuring rotational torque by this system is 2% or less. We may conclude that the measurement system is sufficient to measure rotational torque of shaft in industry.

• Journal of Advanced Marine Engineering and Technology
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• 제39권2호
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• pp.179-186
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• 2015

In the indoor location estimation system, which has recently been actively studied, the received signal strength indicator contains a high level of noise when measuring the signal strength in the range between two nodes consisting of a receiver and a transceiver. To minimize the noise level, this paper proposes an improved adaptive smoothing filter that provides different exponential weights to the current value and previous averaged one of the data that were obtained from the nodes, because the characteristic signal attenuation of the received signal strength indicator generally has a log distribution. The proposed method can effectively decrease the noise level by using a feedback filter that can provide different weights according to the noise level of the obtained data and thus increase the accuracy in the distance and location without an additional filter such as the link quality indicator, which can verify the communication quality state to decrease the range errors in the indoor location recognition using ZigBee based on IEEE 802.15.4. For verifying the performance of the proposed improved adaptive smoothing filter, actual experiments are conducted in three indoor locations of different spatial sections. From the experimental results, it is verified that the proposed technique is superior to other techniques in range measurement.

• 한국산학기술학회논문지
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• 제13권4호
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• pp.1863-1871
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• 2012

기존의 OSS의 활용은 운영체제나 DBMS와 같은 시스템 애플리케이션의 사용이 주를 이루었다. 그러나 현재 많은 기업에서 시스템 소프트웨어가 아닌 응용 애플리케이션 중심으로 OSS를 활용하려고 한다. 그러나 OSS를 활용한 응용 애플리케이션 개발을 위해서는 기반이 되는 OSS의 선정이 무엇보다 중요하다. 기존의 OSS 평가 연구의 범위는 전체 OSS 품질을 포함하고 있다. 그러므로 OSS 선정에 대한 평가 연구는 미흡하다. 또한 평가의 결과는 정량적인 측정보다 정성적인 측정에 기반하고 있다. 본 연구에서는 기존의 OSS 평가지표들 중 선정을 위한 지표들만을 도출하고 이를 기반으로 프로젝트 특징에 따라 정량적인 평가가 가능한 평가지표를 제안한다. 제안하는 평가지표는 OSS 커뮤니티 내의 정보만을 가지고 평가할 수 있는 초기평가지표와 정량적인 측정이 가능한 상세평가지표로 구분하여 제안한다. 이를 통해 OSS 선정 시 정량적인 점수와 지표를 통해 객관적인 근거를 제공한다.