• Journal of Information Processing Systems
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• 제7권1호
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• pp.63-74
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• 2011

As a powerful and flexible processor, the Graphic Processing Unit (GPU) can offer a great faculty in solving many high-performance computing applications. Sweep3D, which simulates a single group time-independent discrete ordinates (Sn) neutron transport deterministically on 3D Cartesian geometry space, represents the key part of a real ASCI application. The wavefront process for parallel computation in Sweep3D limits the concurrent threads on the GPU. In this paper, we present multi-dimensional optimization methods for Sweep3D, which can be efficiently implemented on the finegrained parallel architecture of the GPU. Our results show that the overall performance of Sweep3D on the CPU-GPU hybrid platform can be improved up to 4.38 times as compared to the CPU-based implementation.

• 한국정보처리학회논문지
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• 제7권3호
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• pp.901-908
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• 2000

Satellite communication in the 21 century's high tech information world is developing rapidly, marked by high levels of applications and functions. For example, satellite communication can process and switch the speed of the service provided by a broad and vast digital multimedia system such as a long-distance all between nations or broadcasting transfer service, which is supplied by a contemporary satellite system. So, it bring about problems which lack of satellite orbit and gibes out frequency resource by increment of satellite universally. To support this, an OBP satellite system is need, which includes an on-board IF/RF switch, baseband signal processing, multi-beam antenna technology, as well as a simple transponder system. In this paper, we have outlined the next generation of satellite communication; satellite OBP transport network architecture, which offers multimedia service and applied frequency reuse method for multi-spot beam. The satellite B-ISDN transport network architecture is also analyzed.

• Journal of Information Processing Systems
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• 제7권4호
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• pp.635-652
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• 2011

In ubiquitous environments, many applications need to process data with time and space dimensions. Because of this, there is growing attention not only on gathering spatiotemporal data in ubiquitous environments, but also on processing such data in databases. In order to obtain the full benefits from spatiotemporal data, we need a data model that naturally expresses the properties of spatiotemporal data. In this paper, we introduce three spatiotemporal data models extended from temporal data models. The main goal of this paper is to determine which data model is less complex in the spatiotemporal context. To this end, we compare their query languages in the complexity aspect because the complexity of a query language is tightly coupled with its underlying data model. Throughout our investigations, we show that it is important to intertwine space and time dimensions and keep one-to-one correspondence between an object in the real world and a tuple in a database in order to naturally express queries in ubiquitous applications.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2018년도 추계학술발표대회
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• pp.353-355
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• 2018

The aim of this paper is Although a large amount of sensor data is generated in the manufacturing process of a manufacturing company and the necessity of utilizing sensor data is felt, there is a real difficulty in collecting a large amount of sensor data and introducing analysis / service. Using W3C Web document standard format, XML based technology, it collects data to provide production status and equipment status information, and researches middleware for sensor data processing that user can analyze.

• 한국수학교육학회지시리즈A:수학교육
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• 제46권4호
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• pp.483-492
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• 2007

The purpose of this study was to investigate the relation between the cognitive processes and the mathematical achievement of the 4th grade students. And according to the several studies, there were significant relation between cognitive processes and achievement. Based on the PASS(Planning-Attention-Simultaneous-Successive Processes) Model presented by Das and Naglieri, four cognitive process variables were selected. The results of this study as follows. First, there was not significant relation between attention and mathematical achievement. Second, there was significant relation between planning and mathematical achievement. Third, there was significant relation between simultaneous/successive processes and mathematical achievement. Fourth, the students who got higher scores in the two types (simultaneous/successive)of information processing had more mathematical achievement. Specially, the students who got higher scores in the type of simultaneous information processing had higher scores in mathematical achievement. These results indicated that planning and simultaneous information processing had influence on the mathematical achievement.

• Journal of Information Processing Systems
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• 제15권3호
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• pp.478-491
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• 2019

This work develops a monitoring system for the population with health concerns. A belt integrated with an on-body circuit and sensors measures a wearer's selected vital signals. The electrocardiogram sensors monitor heart conditions and an accelerometer assesses the level of physical activity. Sensed signals are transmitted to the circuit module through digital yarns and are forwarded to a mobile device via Bluetooth. An interactive application, installed on the mobile device, is used to process the received signals and provide users with real-time feedback about their status. Persuasive functions are designed and implemented in the interactive application to encourage users' physical activity. Two signal processing algorithms are developed to analyze the data regarding heart and activity. A user study is conducted to evaluate the performance and usability of the developed system.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 추계학술발표대회
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• pp.128-130
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• 2021

Smart cities collect data from thousands of IoT-based sensor devices for intelligent application-based services. Centralized cloud servers support application tasks with higher computation resources but introduce network latency. Fog layer-based data centers bring data processing at the edge, but fewer available computation resources and poor task allocation strategy prevent real-time data analysis. In this paper, tasks generated from devices are distributed as high resource and low resource intensity tasks. The novelty of this research lies in deploying a virtual node assigned to each cluster of IoT sensor machines serving a joint application. The node allocates tasks based on the task intensity to either cloud-computing or fog computing resources. The proposed Task Allocation Strategy provides seamless allocation of jobs based on process requirements.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.1323-1326
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• 2004

본 연구에서는 OPC(OLE for Process Control)가 마이크로소프트의 COM(Component Object Model)과 DCOM(Distributed COM) 기술을 사용함으로써 윈도우즈 플랫폼에서 클라이언트 어플리케이션이 개발되어 져야 하는 제약을 해결하기 위하여 Java2OPC Gateway를 제안한다. Java2OPC Gateway는 프로세스 컨트롤 장비와 연결된 OPC 서버쪽과 통신하는 클라이언트의 기능과 다양한 플랫폼에서 프로세스 데이터에 접근하기 위한 자바 어플리케이션과 통신하는 서버의 기능을 가진다. 클라이언트 모듈은 C로 작성되고 서버 모듈은 Java로 작성되어 클라이언트 모듈과 서버 모듈은 JNI(Java Native Interface)로 연결 된다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.249-252
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• 2009

최근 다양한 정보검색 기법의 발달로 인해 사용자는 인터넷으로부터 유용한 데이터를 쉽게 획득할 수 있다. 이러한 데이터는 스트림 데이터와 유사하게 연속적으로 발생하기 때문에 인터넷에서 발생하는 대량의 데이터 중에서 사용자의 요구에 맞는 데이터만을 추출하기 위한 기법이 필요하다. 전통적인 데이터 추출 방법에서는 데이터를 먼저 데이터베이스에 저장한 후에 사용자의 요구를 질의로 변환하여 처리하였다. 그러나 이러한 방법은 연속적으로 발생하는 대용량의 데이터에 대하여 사용자 질의를 처리하는 경우에 비효율적인 문제가 있다. 이 논문에서는 인터넷 환경에서 대용량의 연속적인 데이터 스트림으로부터 사용자의 요구에 맞는 데이터를 추출하는 질의처리 기법을 제안한다. 먼저 인터넷에서 발생하는 데이터의 변화를 이벤트로 표현하고, 사용자의 요구사항을 프로파일로 정의한 이벤트-프로파일 모델을 제안한다. 그리고 이 모델을 기반으로 이벤트와 프로파일을 효율적으로 처리하기 위한 여과방법을 제안한다.

• 한국문헌정보학회지
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• 제32권4호
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• pp.87-103
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• 1998

문헌정보학계에서 개발하여 학습도구로 사용하고 있는 정보처리모형이 왜 창의성 함양에 도움이 되는가? 창의성은 정보의 통합에서 생긴다는 전제를 가지고, 사람의 마음과 두뇌가 정보를 처리할 때와 정보처리모형을 사용할 때 정보통합이 일어나는가를 살펴본 결과 양자에서 다 같이 그 시스템 자체가 창의성을 생산해 내는 정보의 통합을 위한 장치임이 드러났다. 그러므로 정보처리모형의 사용은 사고과정의 정보통합을 도울 수 있다. 또 문자나 언어와 같은 심리적 도구의 기능이 사람의 사고과정에서 일어나는 정보의 통합을 돕는 것이라는 연구결과를 미루어 정보처리모형도 하나의 심리적 도구이므로 사고과정에서 일어나는 정보의 통합을 도와준다고 유추할 수 있다. 따라서 정보처리모형은 두 가지 이유에서 인간정보처리가 통합적이 되도록 도와준다. 즉 창의성을 돕는것이다.