• Proceedings of the Korean Operations and Management Science Society Conference
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• 2007.11a
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• pp.273-287
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• 2007

The mobile Internet (M-Internet) service is a form of subscription-based information Systems (IS) services in which usage continuance is essential for the eventual success of the service providers. However, previous research on IS continuance has focused mainly on the technology user aspects despite the fact that the user plays a dual role of being a technology user and service consumer in many IS usage contexts. This study thus aims to examine IS continuance based on the theoretical foundation of dedication-based and constraint-based customer relationship development in the context of M-Internet service. Four customer relationship development factors (satisfaction, perceived value, familiarity, and switching costs) are identified and tested on how they affect continuance intention from a survey conducted on M-Internet service users. Then, the results of this study are discussed along with its limitations and implications.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.788-791
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• 2007

In order that An agent acts activity that makes sense corresponding to a variety of event and behavior, attention maybe occur according to perception, personality and desire. As a result contexts are switched while this attention is changed. In this paper. We propose the processing algorithm of the attention and corresponding contexts to it that are switched.

• IEMEK Journal of Embedded Systems and Applications
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• v.8 no.3
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• pp.163-169
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• 2013

This paper proposes a novel ECU (Electronic Control Units) update algorithm for AUTOSAR based automotive embedded system. The proposed algorithm provides fast and easy ECU update by extending AUTOSAR CAN Interface. The proposed system removes the update sequences from PDUR to RTE (ECU update program), and it stops other ISRs and operating system in order to reduce unnecessary context switching time. In experimental results, we can see that the proposed algorithm reduces update time.

• Journal of Communications and Networks
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• v.2 no.1
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• pp.18-34
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• 2000

The evolution of mobile communications is inducting several new issues belonging to the system engineering disciplines. this paper tires to underline some of the most important problems staring room the novel requirements and the application characteristics expected for Third Generation Mobile System. Based on these new service peculiarities. the radio resource control and the architectural solutions to be chosen for the Mobile core network are becoming key issues to be investigated for the forthcoming configurations. Particularly. the service acceptance control and the perspective of integration with the IP (internet Protocol) context are of great importance for the definition of the radio control functions and the specification of the switching and nobility control features respectively．The paper presents some basic considerations on the cellular planning issues arising in W-CDMA ( wideband -code division Multiple access) systems. by underlying the most significant innovative elements that are to be introduced in the planning process form the mobile operator viewpoint..

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.121.1-121
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• 2002

Calculation unit and peripheral units that are used to make the position controller are embedded to one chip FPGA. $\textbullet$ Feed-forward PID controller and interpolator in the calculation unit mitigate frequent context switching. $\textbullet$ The peripheral units reduce the size of the joints position control board. $\textbullet$ Because the calculation unit is designed with pipeline structure, it has the advantages to apply to the multi joints.

• 한국컴퓨터산업교육학회:학술대회논문집
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• 2003.11a
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• pp.17-22
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• 2003

The surge of Internet traffic makes the bottleneck nowadays. This problem can be reduced by substituting the media of network, routers and switches with more high-performance goods. However, we focused radically the server performance of processing the service requests. We prepose the method improving performance of server in the Linux kernel stack. This accelerator accepts the requests from many clients, and processes them using not user threads but kernel thread. To do so, we can reduce the overhead caused by frequent calling of system calls and the overhead of context switching between threads. Furthermore, we implement CPN(Coloured Petri Net) model. By using the CPN model criteria, we can analyze the characteristics of operation times in addition to the reachability of system. Benchmark of the system proves the model is valid.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11b
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• pp.1097-1100
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• 2003

UNIX/LINUX 시스템에서 로컬 파일 시스템의 파일 데이터가 네트워크를 통해서 원격지 시스템에 전송되는 경우, 사용자와 커널(Kernel) 공간 사이에서의 메모리 복사가 적어도 2 회에 걸쳐 수행된다. 이러한 사용자와 리눅스(Linux) 커널 공간 사이에서 이루어지는 메모리 복사는 데이터 전송에 소요되는 시간을 증가시키고, 잦은 시스템 호출의 호출은 응용 프로세스와 리눅스 커널 간 문맥 교환(context switching)의 발생을 빈번하게 야기한다. 본 연구에서는 이러한 문제점들을 해결하기 위하여 필요한 경우 사용자와 리눅스 커널 사이에서의 메모리 복사를 수행하지 않고, 커널 공간 내에서의 메모리 복사를 최대한 제한할 수 있는 새로운 알고리즘을 제시한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.1B
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• pp.64-70
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• 2003

In order to provide seamless wireless Internet service, the basic mobile IP protocol should be enhanced to solve packet loss problem from large registration latency because frequent handoffs occur in cellular networks. In this paper, we suggest a new micro-mobility management protocol based on MPLS while supporting Qos, and evaluate its performance using simulation. We use MPLS label switching techniuqe in cellular access networks to simplify location management and speed up packet transmission. We adopt context transfer procedure to minimize the delay needed to attain prior level of service after handoff Packet loss can be minimized during handoff by transmitting received packets from old BSLER to new BSLER using a spliced LSP between them. Simulation results show that the proposed MPLS-based micro-mobility management protocol provides a seamless handoff and supports QoS of user traffic.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.539-542
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• 2006

Personal Software Process (PSP)에서 개인 개발자들이 수행해야 되는 측정 및 분석 활동이 제시된다. 측정 및 분석 활동의 일관되고 지속적인 수행으로 개발자들은 소프트웨어 품질 향상, 보다 정확한 예측, 개인 역량의 객관적인 평가, 개인 프로세스의 정량적 관리 등의 이득을 얻을 수 있다. 측정 및 분석 활동에서 신뢰성 있는 데이터의 수집이 무엇보다 중요하다. 하지만, 데이터 수집의 높은 오버헤드(overhead)와 컨텍스트 스위칭(context switching)의 문제로 인하여 신뢰성 있는 데이터의 수집에 많은 어려움이 존재한다. 이러한 어려움을 감소시키기 위해 자동 데이터 수집 및 분석 기법이 연구되어 왔다. 본 논문에서는 기존의 자동 데이터 수집 및 분석 기법을 확장하여 웹 애플리케이션 개발에서의 개인 프로세스 데이터를 자동 수집 및 분석 하는 도구를 설명한다.

• Journal of Information Processing Systems
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• v.13 no.4
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• pp.941-950
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• 2017

The round robin algorithm is regarded as one of the most efficient and effective CPU scheduling techniques in computing. It centres on the processing time required for a CPU to execute available jobs. Although there are other CPU scheduling algorithms based on processing time which use different criteria, the round robin algorithm has gained much popularity due to its optimal time-shared environment. The effectiveness of this algorithm depends strongly on the choice of time quantum. This paper presents a new effective round robin CPU scheduling algorithm. The effectiveness here lies in the fact that the proposed algorithm depends on a dynamically allocated time quantum in each round. Its performance is compared with both traditional and enhanced round robin algorithms, and the findings demonstrate an improved performance in terms of average waiting time, average turnaround time and context switching.