• 디지털산업정보학회논문지
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• 제9권1호
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• pp.53-58
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• 2013

In this paper, we proposed low power algorithm for battery residual capacity and a task. Algorithm the mobile devices power of the battery residual capacity for the task to perform power consumption to reduce the frequency alters. Task is different in power consumption according to kinds of in time accomplishment device to use. Adjustment of power consumption analyzes kinds of given tasks from having the minimum power consumption task to having the maximum power consumption task. Control frequency so that power consumption waste to be exposed to battery residual capacity can be happened according to the results analyzed. Experiment the frequency by adjusting power consumption a method to reduce using [7] and in the same environment power of the battery residual capacity consider the task to perform frequency were controlled. Efficiency was proved compare with the experiment results [7]. The experiments results show increment in the number of processing by 45.46% comparing with that [7] algorithm.

• 대한감각통합치료학회지
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• 제3권1호
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• pp.23-35
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• 2005

Objectives : The purpose of the study is to understand the sensory processing capacity and behavioral characteristics for preschoolers without disabilities, and to investigate the relationship between sensory processing skills and the behavioral characteristics. Methods : Mothers of preschoolers without disabilities between ages of 4 and 6 who attend Y kindergarten which is located in Busan, H kindergarten in Suwon, S kindergarten in Gimhae was participated. Mothers filled out the questionnaire at home from 4th to 14th of January in 2004. We used SSP(short sensory profile) which was used by Kim, Mi-Sun in 2001 to understand the sensory processing skills. We also used Behavior During Testing Checklist find their places in Miller Assessment for preschoolers to understand behavior characteristics. The results were analyzed with SPSS 10.0. Results : 1. Total incidents in sensory processing were 157 out of 190. Among sub items of the sensory processing, the mark of lower energy/weak was highest with 4.39 point and the mark of taste/smell sensitivity was lowest with 3.60 point. Total incidents in behavioral characteristics were 20 out of 24. Among the area of behavioral characteristics, the mark of sensory responses/threshold area was highest with 2.73 point and the mark of social interaction area was lowest with 2.29 point. 2. Children's total sensory processing capacity correlates with behavioral characteristics, the more sensory processing capacity, the more behavioral characteristics. Sensory processing point correlates with behavioral characteristics points except this item, reaction to separation from caretaker. Conclusions : We hope that the children who have behavioral characteristics with difficulties in sensory processing skills can be distinguished on the basis of this studying. Also, as we find and relieve early stage of the symptoms, following study which can present based to facilitate children's social development and improve the learning ability.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.992-995
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• 1996

The major roles of Power SCADA System are continuous monitoring of electrical equipments state, real-time data processing and dispatching. Especially, SCADA system demands fast response time in heavy load condition, high reliability, fault tolerance, expansion capacity for the future. According to developing computer system technology, SCADA system is changing system configuration from centralized processing system to distributed processing system. This paper describes operational benefits, problems and improvement (which is studying in theory) in the application of Open System Architecture SCADA which has been installed since 1994, Seoul regional control center in KEPCO.

• 정보처리학회논문지C
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• 제12C권5호
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• pp.757-764
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• 2005

이동 인터넷 환경에서 보안성과 급증하는 서비스 요구를 효율적으로 제어하기 위해 AAAv6기반 Diameter 기술이 사용자 인증에 사용되고 있다. 그러나 Diameter에서 제공하는 기본적인 인증기법은 로밍 서비스나 인터넷 전송 과정에서 보안성이 떨어지는 단점을 가지고 있어 EAP-MD5와 같은 암호알고리즘과 결합하여 사용자 인증처리를 수행한다. 이러한 사용자 인증처리를 효율적으로 수행하기 위해서는 AAAv6 환경을 구성하고 있는 AAA attendent, AAAv, AAAb, AAAh, HA 서버들의 성능 충족 방안이 필요하다. 따라서, 이 논문에서는 도메인간의 이동성을 가지는 AAAv6 인증 모델중의 하나인 EAP-MD5기반의 운영 모델을 설계하고 실험을 통하여 사용자 인증 기능을 수행하는 각 서버의 최적 성능지표를 산출하고 이를 이용하여 AAAv6의 사용자 인증 처리를 최적화 시킬 수 있는 지표들을 제시한다.

• 융합신호처리학회논문지
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• 제10권1호
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• pp.49-59
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• 2009

본 논문은 웨이블릿 영역에서 인간지각시스템 특성, 적응 스케일(Scale) 개수와 가중치 함수를 이용하고 실험적 임계값을 적용하여 디지털 워터마크의 삽입용량 최적화를 위한 디지털 워터마킹 알고리즘을 제안하였다. 실험적 임계값을 기초로 하여 웨이블릿 영역에서 중요 계수를 찾아 디지털 워터마크의 삽입용량 최적화를 위한 워터마크를 삽입하였다. 원본영상을 3-레벨(Level)로 웨이블릿 변환하여, 저주파에 해당하는 기저대역을 제외한 나머지 모든 부대역을 워터마크 정보를 삽입하였다. 디지털 워터마크의 삽입용량 최적화를 위하여 인간시각시스템 특성을 근거로 한 적응 스케일 계수와 가중치 함수는 고려되었으며, 이 적응 스케일 계수와 가중치 함수는 강인성과 비가시성의 향상을 도모하였다. 워터마크는 가우시안 랜덤 시퀀스로 구성되어 있고 워터마크의 검출은 상관도를 이용하여 워터마크의 삽입 여부를 판단한다. 본 논문에서 제안한 방법으로 모의 실험한 결과 비교적 우수한 화질에서 JPEG 손실 압축, 잡음 첨가, 잘라내기, 흐림, 예리화, 그리고 선형 및 비선형 필터링 등의 공격에 강인함을 알 수 있었다.

• 한국수소및신에너지학회논문집
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• 제17권2호
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• pp.125-132
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• 2006

The alloys which compositions were represented by the formula, $Ti_{(0.22+X)}Cr_{(0.28+1.5X)}V_{(0.5-2.5X)}$ ($0{\leq}X{\leq}0.12$), had the total hydrogen storage capacity higher than 3 wt% and the effective hydrogen storage capacity higher than 1.4 wt%. Particularly, among all the tested alloys, the $Ti_{0.32}Cr_{0.43}V_{0.25}$ alloy exhibited the best effective hydrogen storage capacity of 1.65 wt%. Furthermore, the reversible bcc${\leftrightarrow}$fcc structural transition was observed with hydrogenation and dehydrogenation, which predicted the possibility of pressure cycling. EDS analysis revealed micro-segregation, which suggested the necessity of microstructure homogenization by heat treatment. The $Ti_{0.32}Cr_{0.43}V_{0.25}$ alloy was selected for heat treatment and for other related studies. The results showed that the total and the effective hydrogen storage capacity increased to 3.7 wt% and 2.3 wt%, respectively. The flatness of the plateau region was also greatly improved and heat of hydride formation was determined to be approximately -36 kJ/mol $H_2$.

• 대한의용생체공학회:의공학회지
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• 제6권2호
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• pp.29-32
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• 1985

We have developed a real time digital subtraction a giographic system(RTDSA) and specified it's performance characteristics. Our RTDSA has large-capacity frame memories and a post-processing computer which enables various advanced digital image processing techniques.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.126-129
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• 1999

In this paper, it is assumed that a mobile radio channel is a Rayleigh distributed multipath fading channel and Erlang capacity and equivalent channel numbers are calculated for the reverse link of a imperfect power controlled DS/CDMA cellular system considering both shadowing and multipath fading. The DS/CDMA blocking probability is calculated based on a new analysis method that considers Erlang capacity and ICF(interference correction factor) using the median value of $E_{b(i)}$/ $I_{o}$ corresponding to each reverse link user. It is showed that the effect of multipath fading must not be ignored in Erlang capacity of the IS-95 DS/CDMA cellular system and the Erlang capacity is decreased according to the increase of the deviation of the imperfect power control, to the decrease of the processing gain, to the increase of the voice activity.y.

• 한국시뮬레이션학회논문지
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• 제10권3호
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• pp.71-82
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• 2001

Considering material handling delay which occurs between storage and processing stations, we propose an algorithm to estimate the required storage capacity, i.e., number of aisles and number of openings in vertical and horizontal directions in each aisle, of an automated storage/retrieval(AS/R) system. Due to the random nature of storage and retrieval requests, proportion of single and dual commands is not known in advance. Two design criteria, maximum permissible overflow probability and maximum allowable storage/retrieval(S/R) machine utilization, are used to compute the storage capacity. Most of studies assume that storage capacity of AS/R systems is given, although it is a very important decision variable in the design phase. Therefore, the proposed model can be effectively used in the design phase of new AS/R systems.

• 말소리와 음성과학
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• 제11권4호
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• pp.63-70
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• 2019

This study investigated individual variability of L2 learners' categorical judgments of L2 stops by exploring English learners' perceptual processing of two acoustic cues (voice onset time [VOT] and f0) and working memory capacity as sources of variation. As prior research has reported that English speakers' greater use of the redundant cue f0 was responsible for gradient processing of native stops, we examined whether the same processing characteristics would be observed in L2 learners' perception of Korean stops (/t/-/t^h/). 22 English learners of L2 Korean with a range of L2 proficiency participated in a visual analogue scaling task and demonstrated variable manners of judging the L2 Korean stops: Some were more gradient than others in performing the task. Correlation analysis revealed that L2 learners' categorical responses were modestly related to individuals' utilizations of a primary cue for the stop contrast (VOT for L1 English stops and f0 for L2 Korean stops), and were also related to better working memory capacity. Together, the current experimental evidence demonstrates adult L2 learners' top-down processing of stop consonants where linguistic and cognitive resources are devoted to a process of determining abstract phonemic identity.