• 융합신호처리학회논문지
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• 제13권3호
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• pp.156-161
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• 2012

임의 접속(random access) 프로토콜은 기본적으로 센싱 기능을 가지고 있으며, 이것을 이용하여 분산형 무선 네트워크 시스템 구축에 적합한 특징을 가지고 있다. 이러한 기술적 특징은 중앙식 제어(centralized control)가 어려운 이기종 시스템들이 동작하는 인지 무선 통신 환경에 대하여 장점을 가지며, 인지 무선 통신 환경에서 임의 접속의 성능을 검증해 보아야 한다는 동기를 제공한다. 이 논문에서 우리는 인지 무선 통신 환경에서 CSMA/CA(carrier-sensing multiple access with collision avoidance)기법을 도입하고, 성능을 분석하는 기본 틀을 제공한다.

• Journal of Information Processing Systems
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• 제10권1호
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• pp.119-131
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• 2014

In recent literature on traffic scheduling, the combination of the two-dimensional discrete-time Markov chain (DTMC) and the Markov modulated Poisson process (MMPP) is used to analyze the capacity of VoIP traffic in the cognitive radio system. The performance of the cognitive radio system solely depends on the accuracy of spectrum sensing techniques, the minimization of false alarms, and the scheduling of traffic channels. In this paper, we only emphasize the scheduling of traffic channels (i.e., traffic handling techniques for the primary user [PU] and the secondary user [SU]). We consider the following three different traffic models: the cross-layer analytical model, M/G/1(m) traffic, and the IEEE 802.16e/m scheduling approach to evaluate the performance of the VoIP services of the cognitive radio system from the context of blocking probability and throughput.

• 대한인간공학회지
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• 제18권1호
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• pp.133-147
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• 1999

Traffic signs without a cognitive consideration in their design may cause information-processing problem that could result in a mental confusion among drivers often lead to a serious traffic accident. Therefore, in this study, several traffic signs currently used in Seoul Metropolitan area have been sampled and analyzed to identify design problems that usually caused by neglecting drivers cognitive ability. To classify the practical design problems, five major information-processing problems have been suggested: indistinguishable information, information conflict, missing information, sign-load mismatch, and information overload. In order to solve these cognitive problems, new traffic signs have been suggested in this study. An experiment was also performed to validate the new traffic sign. Twenty-four healthy subjects participated in the experiment. They were asked to answer the Question after observing the traffic signs continuously displayed on computer screen. The result indicated that subjects improved the accuracy in understanding the signs by 1.4 times when they used the suggested traffic sign compared to the old one. Based upon the results, a cognitive guideline was suggested for correct and speedy reading of traffic signs by improving information processing and reducing of human error. In conclusion, the traffic sign may well be applied to design an intelligent traffic sign system to increase the safety and comfort of drivers, especially in complex load condition.

• 한국실내디자인학회논문집
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• 제24권1호
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• pp.104-114
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• 2015

The library means to children a place where they find information necessary for them among a variety of knowledge and information to address their intellectual curiosity, which makes their lives wise and mature. There are not enough research materials understanding children's cognitive systems and behaviors in studies of a children's library with this necessity. This study divided and analyzed the behaviors of children, who were users into three types of reading in terms of information processing. First, it observed the types of reading depending on the stage of their cognitive development; Second, it analyzed the patterns of their behaviors through plays; and lastly, it presented the phases of their behaviors depending on the degree of an assistant's intervention. As a result of the study, the sensory system used and the space preferred differed depending on the stage of their cognition; there were differences in the patterns of their behaviors in each age group depending on the type of play; and there were differences in the children's ability of information processing depending on the assistant's ability. It is anticipated that there will be improvements of children's reading ability at the reading room in a better environment if the three types are considered in terms of information processing.

• 한국콘텐츠학회논문지
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• 제18권11호
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• pp.527-539
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• 2018

노화로 인한 인지의 변화는 정상 노인들의 통사처리에 부정적 영향을 끼치는데 작업기억용량이 중요한 인지기능을 한다고 알려져 있다. 본 연구는 명사구 연결 전치사구의 이해에 도움이 되는 문맥을 제시할 때와 그렇지 않을 때 정상 노인과 젊은 성인이 어떻게 명사구 연결 전치사구를 처리하는지 단어별 자율조절읽기 방법을 통해 알아보았다. 또한, 이 때 어떤 인지기능이 문맥 이용을 통한 명사구 연결 전치사구의 처리능력과 관련이 있는지도 살펴보았다. 정상 노인은 읽기과제에서 문맥유무에 상관없이 젊은 성인보다 읽기속도가 느렸다. 그러나 두 그룹 모두 문맥이 존재할 때 명사구 연결 전치사구의 처리 속도가 빨랐다. 즉, 노인들의 노화로 인한 인지의 저하는 처리 속도만 느리게 했을 뿐 질적인 면에서 차이는 없었다. 문맥을 이용한 명사구 연결 전치사구 처리 시 관련된 인지기능은 교대주의력으로 나타났으며 본 연구에서는 작업기억용량의 역할은 발견되지 않았다. 이를 통해 노화가 통사처리에 끼치는 영향은 반드시 부정적인 것이 아니라 통사구조에 따라 다를 수 있으며, 통사 구문의 종류에 따라 관련된 인지기능이 다를 수 있음을 시사한다.

• 가정과삶의질연구
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• 제8권1호
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• pp.31-47
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• 1990

The purpose of this study were to investigate: 1) The level of information-processing competencies of children consumers. 2) The differences of information-processing competencises of children consumers according to the cognitive development stage, the variables related to social learning and the socio-ecomonic variables. 3) The independent influences of variables related to information-processing competencies of children consumers. 4) The independent influences of variables related to information-processing competencies of children consumers according to the cognitive development stage. For these purposes, a survey was conducted using questionaires. The questionaires consisted of mother's and child's were distributed to children of second and 6th grade and their mothers of 5 elementary schools in Seoul 634 cases were selected for data analysis. Then, these data were analyzed with statistical methods such as Frequency Distribution, Percentile, Mean, One-way Anova, Scheff -Test, T-Test, Pearson's Correlation and Multiple Regression Analysis. From these finding, the follawing suggestions are made. First, to improve information processing competencies of children consumers, children consumers should be offered the consumer information that is suitable to child's cognitive development stage. Second, the consumer education and learning practical discriminatory competencies on TV ads. should be conducted for children consumers and his mothers. Third, children consumers should have the opportunities to practice as a consumer. The last, children consumers in low-income should be offered the specially educational program.

• Asia pacific journal of information systems
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• 제26권2호
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• pp.268-289
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• 2016

While most of studies have paid attention to the initial adoption of a specific application, research on applications has not focused on an individual's update decision process. This study draws upon both dual information processing and status quo bias perspectives as a comprehensive theoretical lens to explain why individuals do not update their applications. This study assumes that individuals' inertia could be the main reason for their reluctance to update the applications. Based on a survey of 186 smartphone users, this study demonstrated that both habit as an affective trigger of system 1 thinking and sunk cost as a cognitive trigger of system 2 thinking promoted the two types of inertia (i.e., affective and cognitive based inertia) in individuals, which have a negative effect on their willingness to update their applications. By grounding the research model in a theoretical view, such as dual information processing and status quo bias, this study provides a unique theoretical lens from which to view individuals' behaviors, thereby gaining a better understanding of their decision not to update to the current version of applications. This study also investigates the moderating effect of the types of applications on the relationships between affective/cognitive-based inertia and willingness to update. Results show that both habit and sunk cost decrease the willingness to update because they increase both affective and cognitive-based inertia. This study also found that the effects of affective/cognitive based inertia differed depending on the type of applications.

• 인지과학
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• 제4권2호
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• pp.5-28
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• 1994

본 연구의 목적은 한국 현대시 텍스트가 독자에게 전달하는 시적 효과를 담화,텍스트 언어학및 인지적 화용론의 관점에서 분석하는 것이다.담화-텍스트 언어학은 텍스트의 언어 자료자체보다는 이를 생산하고 수용하는 인지과정에 주목하는 인지과학의 한 분야이며,적합성 원리로 요약되는 인지적 화용론은 텍스트 언어학에서 규명하는 바 여러 인지적 조작 절차드의 심리학적 근거가 된다.많은 인지적 책략 및 조작 절차들이 집약되어 있는 한국 현대시 텍스트를 인지-화용론적 관점에서 분석한 결과,이제까지 모호하게 개진되어 오던 많은 시적 효과가 텍스트 언어학 및 인지적 화용론의 분석한 장치에 의해서 명코ㅔ하게 설명될수 있음이 밝혀졌다.즉 정보성의 격상및 격하,각별한 결속구조의 사용및 그 수용과정, 작가의 상황 점검과 상황관리 과정에 의한 전국적 인지 패턴의 활성화및 수정등의 인지적 절차를 통해서 독자의 맥락이 수정, 확장되는 효과가 일어나고 바로 이것이 궁극적 으로는 시적 효과를 낳는다는 점을 설명할 수 있다.

• 전기학회논문지
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• 제65권1호
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• pp.122-127
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• 2016

In this paper, new spectrum sensing schemes based on analog/RF front-end processing are introduced for IoT wireless sensor networks. While the conventional approaches for wireless channel cognition have been issued in signal processing area, the RF spectrum cognition concept makes it feasible to achieve cognitive wireless sensor networks (C-WSNs). The spectrum cognition at RF processing is categorized as four kinds of sensing mechanisms. Two recent reseaches are described as promising candidates for the C-WSN. One senses spectrum by the frequency discriminating receiver, the other senses and detects from the frequency selective super-regenerative receiver. The introduced systems with simple and low-power RF architectures play dual roles of channel sensing and demodulation. simultaneously. Therefore, introduced spectrum sensing receivers can be one of the best candidates for IoT wireless sensor devices in C-WSN environments.

• Journal of Information Processing Systems
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• 제13권1호
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• pp.8-25
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• 2017

This survey paper explores the application of multimodal feedback in automated systems for motor learning. In this paper, we review the findings shown in recent studies in this field using rehabilitation and various motor training scenarios as context. We discuss popular feedback delivery and sensing mechanisms for motion capture and processing in terms of requirements, benefits, and limitations. The selection of modalities is presented via our having reviewed the best-practice approaches for each modality relative to motor task complexity with example implementations in recent work. We summarize the advantages and disadvantages of several approaches for integrating modalities in terms of fusion and frequency of feedback during motor tasks. Finally, we review the limitations of perceptual bandwidth and provide an evaluation of the information transfer for each modality.