• 대한간호학회지
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• 제14권1호
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• pp.1-20
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• 1984

This study was attempted to evaluate and explain the correlation between stress and utilization of Dispensary, Frequency of absence, Frequency of accident as the health condition of bluecollared workers. The subjects for this study were 260 workers selected conveniently from 360 workers working at one chemical manufacturer located in Seoul. The dataas measure the Stress was collected through SRRS (The Social Readjustment Rating Scale) which is developed by Holmes ＆ Rahe (1976) from 27th July to 10th August, 1983. The data of Utilization of Dispensary and Frequency of Accident were brought out from the record of Dispensary during past 8 months. The Frequency of Abscence from January to August were collected through diligence and indolence cards of each department. All collected data were analysed based on the SPSS (Statistical Package for the Social Science) program. The results of the study are as follows: 1. The average of Utilization of Dispensary was 7.4, Frequency of abscence 14.6, frequency of Accident 0.4. 2. The average score of Stress was 134 (minimum : 0, maximum : 593, Standard deviation : 109. 3) It can be considered as a slight stressed group by the requlations of Holmes and Rahe. 3. According to the analysed results of correlation between Stress and the Utilization of Dispensary, Frequency of Absence, frequency of Accident, the Utilization of dispensary and stress were significantly related (r= .1955, p<.001), the Frequency of Absence (r=.0284, p >, 05), and the Frequency of Absence (r=.0284, p>.05), and the Frequency of Accident (r= .0831, p>.05) were not significantly related with Stress. 4. In the relation between general characters of subjects and the Utilization of Dispensary, 20 to 25 aged group, women, single, christian, lent-house dwelling, 1 to 5 years employed group used at a high ratio. 5. In the relation between general character of subjects and the Frequency of Absence, men, 51 to 55 aged group, 21 to 25 years employed group indicated high Frequency, and other char-noters were not significantly related. 6. In the relation between general characters of subjects and the Frequency of Accident, women. single, 20 to 25 aged group, catholic, lent-house dwelling, below 1 year employed group showed high frequency. 7. Stress showed a significant difference only with a religion. Catholic group represented mode-rate stressed scored 209.67, and not significantly related with other general characters.

• 한국수학교육학회지시리즈A:수학교육
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• 제51권4호
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• pp.415-427
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• 2012

This study investigated the perception and utilization about computer of beginning secondary mathematics teachers by utilization frequency of computer. To increase utilization frequency of computer in school mathematics, our finding shows that beginning secondary mathematics teachers should have an interest in computer utilization and perceive computers as an important tool for mathematics learning. In addition, they are likely to use more frequently computer under the condition that computers have sufficient class materials and supplement their shortcomings that have derived less usage in math classes. Therefore, future studies have to investigate not only how to develope textbooks and run after-school classes but also how to make creative discretional activities by computer, which makes computers more useful for teacher training. In sum, the results of case studies for computer usability should be released to motivate computer utilization and increase mathematical thinking ability.

• 디지털융복합연구
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• 제12권11호
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• pp.113-121
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• 2014

최근 주요 기업들은 쇼핑 애플리케이션을 마케팅 전략으로 개발하고, 이러한 전략을 효과적으로 실행하는데 무게를 두고 있다. 이러한 애플리케이션의 특성 중 주요한 요인을 정보제공성으로 설정하고 애플리케이션 선호도가 재구매의도에 미치는 영향과 이용빈도의 조절효과에 대해 알아보고자 한다. 그 결과 쇼핑 애플리케이션의 정보제공성은 쇼핑 애플리케이션의 선호도에 영향을 미치고, 쇼핑 애플리케이션의 선호도는 재구매의도에 긍정적인 영향을 미친다. 또한 쇼핑 애플리케이션의 특성이 재구매의도에 직접 영향을 미칠 때와, 선호도를 매개로 하여 재구매의도에 미치는 영향을 비교해본 결과 선호도를 매개로 하여 미치는 영향이 더 큰 것으로 나타났다. 그리고 이용빈도의 조절 효과를 검증한 결과 이용빈도가 낮은 경우 보다 이용빈도가 높은 경우가 더 유의하다는 결과가 나타났다.

• 한국치위생학회지
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• 제20권2호
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• pp.129-137
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• 2020

Objectives: Using the annual data from the 2016 Korean Health Panel, this study aims to identify the factors that affect the dental utilization and expenditure of patients with chronic diseases, and to provide basic data to explain the inequality gap in dental utilization. Methods: The dental utilization and expenditure of 3,557 patients with chronic diseases were analyzedfor frequency using the SPSS Windows version 23.0 (SPSS Inc. IL, USA). Analysis of the factors that affect dental utilization and expenditure were performed using a multiple regression analysis. The level of statistical significance was 0.05. Results: The frequency of dental utilization in patients with chronic diseases was high for subjects who were younger than 65 years and those whose education level was below high school. The frequency of dental utilization was relatively lower for subjects who did not have disabilities and those with healthier subjective health status. The dental expenditure of patients with chronic diseases was higher in subjects who were younger than 65 years and those with greater household income. Conclusions: The above findings suggest that a plan is needed to control dental utilization by efficiently managing chronic diseases, and that a policy-based plan is needed to devise ways to supplement the uninsured medical expenses of dental care.

• 한국정보통신학회논문지
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• 제19권9호
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• pp.2213-2221
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• 2015

안드로이드 기반 스마트폰 플랫폼에서 사용하는 온디맨드 거버너 (Ondemand Governor)는 CPU 사용률(Utilization)에 따라 CPU 동작 주파수를 조절한다. CPU 사용률의 변화량은 작업 스케줄링에 의해 영향을 받으며, CPU 동작 주파수 증감에 따라 스마트 폰의 전력 소비량도 증감한다. 따라서 작업 스케줄링 방식에 따라 변하는 CPU 사용률 및 동작 주파수는 스마트폰의 전력 소비에 영향을 미친다. 이에 온디맨드 거버너 정책을 작업 스케줄링 기법에 적용시켜 CPU 사용률 및 전력 소비, 그리고 작업 마감시한 측면에서 비교 분석하였다.

• 한국산학기술학회논문지
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• 제16권8호
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• pp.5673-5682
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• 2015

본 연구의 목적은 최근 고층아파트 단지 내에서 주요 계획요소로 자주 채택되고 있는 저층부 필로티 공간의 이용실태를 관찰조사하고 공간구문론 축선도 분석(axial analysis)을 통한 동선관련 지표값들(연결도, 통제도, 전체통합도, 국부통합도)과 비교하여 단지내 필로티 공간의 배치와 공간 이용 빈도와의 상관관계를 밝혀 향후 아파트 단지내 필로티 공간 배치 계획 시 기초자료로 삼고자 한다. 본 연구의 결론은 첫째, 필로티 공간은 '단순 이동' 공간으로만 주로 이용되고 있어 주민커뮤니티 의식을 향상시킬 수 있는 공간으로 활용되지 못하고 있는 실정이다. 둘째, 주동별 필로티 공간의 이용 빈도 격차는 '돌출형 출입+필로티 부가형' 단지가 '필로티 출입형' 단지 보다 더 심하게 나타나고 있고, 환경파괴(vandalism) 현상도 더 관찰되고 있다. 셋째, 필로티 공간의 이용도는 공간구문론의 동선관련 지표값인 연결도, 통제도, 전체통합도, 국부통합도와 관련이 있으며, 최소 2가지 이상의 지표값이 높은 필로티 공간은 이용빈도가 높은 경향이 있고, 최소 2가지 이상의 지표값이 낮은 필로티 공간은 이용빈도가 낮은 경향이 있음을 알 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권4호
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• pp.475-490
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• 2010

Cognitive Radio is an advanced enabling technology for the efficient utilization of vacant spectrum due to its ability to sense the spectrum environment. It is important to determine accurate spectrum utilization of the primary system in a cognitive radio environment. In order to define the spectrum utilization state, many CR systems use what is known as the quiet period (QP) method. However, even when using a QP, interference can occur. This causes reduced system throughput and contrary to the basic condition of cognitive radio. In order to reduce the interference time, a frequency-hopping algorithm is proposed here. Additionally, to complement the loss of throughput in the FH, a HMM-based channel prediction algorithm and a channel allocation algorithm is proposed. Simulations were conducted while varying several parameters. The findings show that the proposed algorithm outperforms conventional channel allocation algorithms.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권10호
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• pp.2883-2902
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• 2023

Since the existing anti-jamming methods, including intelligent methods, have difficulty against high-speed reactive jamming, we studied a new methodology for jamming utilization instead of avoiding jamming. Different from the existing jamming utilization techniques that harvest energy from the jamming signal as a power supply, our proposed method can take the jamming signal as a favorable factor for frequency detection. Specifically, we design an intelligent differential frequency hopping communication framework (IDFH), which contains two stages of training and communication. We first adopt supervised learning to get the jamming rule during the training stage when the synchronizing sequence is sent. And then, we utilize the jamming rule to improve the frequency detection during the communication stage when the real payload is sent. Simulation results show that the proposed method successfully combated high-speed reactive jamming with different parameters. And the communication performance increases as the power of the jamming signal increase, hence the jamming signal can help users communicate in a low signal-to-noise ratio (SNR) environment.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권3호
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• pp.941-955
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• 2015

In dual-channel networks (DCNs), all frequency hopping (FH) sequences used for data channels are chosen from the original FH sequence used for the control channel by shifting different initial phases. As the number of data channels increases, the hitting frequency point problem becomes considerably serious because DCNs is non-orthogonal synchronization network and FH sequences are non-orthogonal. The increasing severity of the hitting frequency point problem consequently reduces the resource utilization efficiency. To solve this problem, we propose a novel hitting frequency point collision avoidance method, which consists of a sequence-selection strategy called sliding correlation (SC) and a collision avoidance strategy called keeping silent on hitting frequency point (KSHF). SC is used to find the optimal phase-shifted FH sequence with the minimum number of hitting frequency points for a new data channel. The hitting frequency points and their locations in this optimal sequence are also derived for KSHF according to SC strategy. In KSHF, the transceivers transmit or receive symbol information not on the hitting frequency point, but on the next frequency point during the next FH period. Analytical and simulation results demonstrate that unlike the traditional method, the proposed method can effectively reduce the number of hitting frequency points and improve the efficiency of the code resource utilization.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 1999년도 추계종합학술대회
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• pp.76-81
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• 1999

최근에 ISM대역과 기존의 주파수대역을 용도에 관계없이 또는 몇 종류의 용도를 포괄적으로 지정하여 허가·신고 없이 사용할 수 있는 개방용 주파수에 대한 움직임이 나타나고 있다. 따라서, 본 논문에서는 비허가 주파수대역 및 개방용 주파수에 대한 세계 각국의 동향, 주파수대역, ISM대역의 개방용 주파수 적용에 대한 세계의 움직임을 검토하였다.