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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The KIPS Transactions:PartA
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Korea Information Processing Society
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Volume & Issues
Volume 18A, Issue 6 - Dec 2011
Volume 18A, Issue 5 - Oct 2011
Volume 18A, Issue 4 - Aug 2011
Volume 18A, Issue 3 - Jun 2011
Volume 18A, Issue 2 - Apr 2011
Volume 18A, Issue 1 - Feb 2011
Selecting the target year
Scalable Data Provisioning Scheme on Large-Scale Distributed Computing Environment
Kim, Byungs-Sang ; Youn, Chan-Hyun ;
The KIPS Transactions:PartA, volume 18A, issue 4, 2011, Pages 123~128
DOI : 10.3745/KIPSTA.2011.18A.4.123
As the global grid has grown in size, large-scale distributed data analysis schemes have gained momentum. Over the last few years, a number of methods have been introduced for allocating data intensive tasks across distributed and heterogeneous computing platforms. However, these approaches have a limited potential for scaling up computing nodes so that they can serve more tasks simultaneously. This paper tackles the scalability and communication delay for computing nodes. We propose a distributed data node for storing and allocating the data. This paper also provides data provisioning method based on the steady states for minimizing the communication delay between the data source and the computing nodes. The experimental results show that scalability and communication delay can be achieved in our system.
Accessibility and Improvements for Flash E-learning Contents
Hwang, Yun-Ja ; Ahn, Mi-Lee ;
The KIPS Transactions:PartA, volume 18A, issue 4, 2011, Pages 129~134
DOI : 10.3745/KIPSTA.2011.18A.4.129
E-learning in Korea supports different educational needs of diverse learners. E-learning became one of the major source of educational services for schools, higher education, lifelong learning, and for special education. Many e-learning contents offered by cyber universities use HTML, CSS, and Flash, and these are known to have limitations on accessibilities. People with disabilities or aged have problems accessing such contents. The purpose of this study is to evaluate accessibility of Flash e-learning contents offered by 9 cyber universities. AccChecker is used to assess accessibility of the contents. The result shows many errors and warning with Text Equivalents, Keyboard Navigation, Properties, Depth of Tree, and Structures that restrict access. In order to improve the quality and expansion of quality e-learning contents, we need aggressive measures to obtain accessibility of contents, and these should be designed at the planning phase rather than adjusted during the development stage. Furthermore, it is vital to train instructional designers, developers and the CEOs to realize the importance of accessibility and learn appropriate skills to increase accessibilities of e-learning contents.
A Buffer Architecture based on Dynamic Mapping table for Write Performance of Solid State Disk
Cho, In-Pyo ; Ko, So-Hyang ; Yang, Hoon-Mo ; Park, Gi-Ho ; Kim, Shin-Dug ;
The KIPS Transactions:PartA, volume 18A, issue 4, 2011, Pages 135~142
DOI : 10.3745/KIPSTA.2011.18A.4.135
This research is to design an effective buffer structure and its management for flash memory based high performance SSDs (Solid State Disks). Specifically conventional SSDs tend to show asymmetrical performance in read and /write operations, in addition to a limited number of erase operations. To minimize the number of erase operations and write latency, the degree of interleaving levels over multiple flash memory chips should be maximized. Thus, to increase the interleaving effect, an effective buffer structure is proposed for the SSD with a hybrid address mapping scheme and super-block management. The proposed buffer operation is designed to provide performance improvement and enhanced flash memory life cycle. Also its management is based on a new selection scheme to determine random and sequential accesses, depending on execution characteristics, and a method to enhance the size of sequential access unit by aggressive merging. Experiments show that a newly developed mapping table under the MBA is more efficient than the basic simple management in terms of maintenance and performance. The overall performance is increased by around 35% in comparison with the basic simple management.
An EDF Based Real-Time Scheduling Algorithm for Imprecise Computation
Choi, Hwan-Pil ; Kim, Yong-Seok ;
The KIPS Transactions:PartA, volume 18A, issue 4, 2011, Pages 143~150
DOI : 10.3745/KIPSTA.2011.18A.4.143
This paper presents an EDF based scheduling algorithm for scheduling imprecise computation model where each task consists of mandatory part and optional part. Imprecise computation is useful to manage overload condition. In overload situation, some optional parts should be removed. The proposed DOP algorithm removes optional parts of earlier deadline tasks to enhance flexibly for newly arriving tasks. A simulation result shows that DOP has better performance than other algorithms.
A Framework Design of an Active Supply Chain Risk Management System from the Perspective of Shippers
Song, Byung-Jun ; Ahn, Hye-Jeong ; Rhee, Jong-Tae ; Lee, Jong-Yun ;
The KIPS Transactions:PartA, volume 18A, issue 4, 2011, Pages 151~158
DOI : 10.3745/KIPSTA.2011.18A.4.151
For the purpose of cost saving and sales promotion, various industry companies have introduced logistics management techniques in their field. However, enterprises faced to damages because proper products can not be provided to customers in basic logistics 3S1L(speedy, safely, surely, and low) principles for environments changing rapidly and inflexible business processes. So, we need the ability in coping with risk to handle this phenomenon. In particular, the shipper of key decisions of supply chain risk management requires continuous exchange and collection of logistics information in the third-party logistics. However the current SCRMS(Supply Chain Risk Management System) is not sufficient to cover the shipper`s various needs and to recognize and respond to emergency situations. Therefore, this paper proposes an active SCRMS framework through the reconsideration about the previous research on SCRM and rearrangement of risk factors for coping with those problems. in addition, it verifies an efficiency through a stability comparison with the current system.
Design and Implementation of the Active Multi-Agent Middleware for the Sensor Network Application
Lee, Yon-Sik ; Jang, Min-Seok ;
The KIPS Transactions:PartA, volume 18A, issue 4, 2011, Pages 159~164
DOI : 10.3745/KIPSTA.2011.18A.4.159
In this paper, we suggest the active multi-agent middleware for the sensor network application. For this, firstly we design and implement the active rule based mobile agent middleware. The mobile agent in the proposed system visits the destination sensor nodes according to the migration list offered by the meta table in the name space of the naming agent, acquires and transmits sensor data according to the purpose and needs through the active rules, and directly executes the actions corresponding to the optional events(changed sensor data and/or time etc.). And then, we show the potential applicability of the active rule based mobile agent middleware in various active sensor networks through the interaction with the rule base system and context database system.