• International Journal of Computer Science & Network Security
• /
• v.22 no.3
• /
• pp.292-302
• /
• 2022

The radar tomographic imaging is based on the Radar Cross-Section "RCS" of the materials of a shape under examination and investigation. The RCS varies as the conductivity and permittivity of a target, where the target has a different material profile than other background objects in a scene. In this research paper, we use Hierarchical Performance Modeling "HPM" and a framework developed earlier to determine/spot bottleneck(s) for pattern recognition of materials using a combination of the Single Layer Perceptron (SLP) technique and tomographic images in radar systems. HPM provides mathematical equations which create Objective Functions "OFs" to find an average performance metric such as throughput or response time. Herein, response time is used as the performance metric and during the estimation of it, bottlenecks are found with the help of OFs. The obtained results indicate that processing images consumes around 90% of the execution time.

• Journal of KIISE:Computing Practices and Letters
• /
• v.16 no.7
• /
• pp.799-803
• /
• 2010

The KDB-tree is a traditional indexing scheme for retrieving multidimensional data. Much research for KDB-tree family frequently addresses the low storage utilization and insufficient retrieval performance as their two bottlenecks. The bottlenecks occur due to a number of unnecessary splits caused by data insertion orders and data skewness. In this paper, we propose a novel index structure, called as $KDB_{CS}^+$-tree, to process skewed data efficiently and improve the retrieval performance. The $KDB_{CS}^+$-tree increases the number of fan-outs by exploiting bit-vectors for representing splitting information and pointer elimination. It also improves the storage utilization by representing entries as a hierarchical structure in each internal node.

• Korea Journal of Hospital Management
• /
• v.5 no.1
• /
• pp.62-83
• /
• 2000

Client satisfaction(CS) has played an important role in the assessment of health service quality. Thus client satisfaction management(CSM) has been highlighted as one of strategic management. Specifically, the client satisfaction approach by moment of truth(MOT) makes significant contributions to the settlement of bottlenecks on client satisfaction. This research deals with the two issues of client satisfaction in large, small and medium sized hospitals. With regard to CS, one issue is to examine the difference of patient satisfaction through MOT between them and the other derives a strategy for improving client satisfaction from the viewpoint of small and medium sized hospitals. We use the survey data for 4 large and 14 small and medium sized hospitals in 1998. Major findings of this research can be summarized as follows: first, in case of outpatients, small and medium sized hospitals have a comparative advantage on contact-points of preparation and accounts over large ones. Second, while inpatients in small and medium sized hospitals are very satisfied with the contact-point of accounts, they are dissatisfied with the contact-points of facilities and hospital rooms. Under the given budget and time constraints, the settlement of these bottlenecks could be effective strategies for improving their patients' satisfaction.

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 2000.11b
• /
• pp.378-387
• /
• 2000

A rice mill plant with a capacity of 2.5 ton/hr was constructed with automated facilities at Chonnam National University. A simulation model was developed with SLAM SYSTEM for evaluating and improving the rice mill plant. The developed model was validated in the views of hulling efficiency, milling efficiency, milled rice recovery, other materials produced, and bottlenecks in the processes. The results of hulling efficiency, milling efficiency, milled rice recovery in the simulation were, respectively, 81.1%, 89.5%, and 73.1%, while those of the actual mill plant were 81.5%, 90.2%, and 73.5%. The simulation results including the productivity of other materials(chaff, bran, broken rice, stone, etc) produced in the processes were almost similar with those of the actual process. In the simulation the bottlenecks were found out in the processes of separating brown rice and of sorting colored rice. These phenomenon also appeared in the actual process. It needed to increase the hourly capacity of the brown rice separator and the rice color sorter. As the developed model could well express the automated rice mill plant, it could be used for designing and improving rice mill plants. In addition, an alternative model needed to be developed for the system control more accurately and for increasing the rice quality.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.19 no.3
• /
• pp.53-58
• /
• 2019

This paper proposes a class-based FQ-CoDel(Flow Queue-Control Delay) algorithm. A variety of application system services create bottlenecks in tactical communication network and the bottlenecks cause some problems such as traffic loss and delay. Therefore, more research on effective traffic processing is needed. The proposed class-based FQ-CoDel algorithm, suggests dynamic buffer management and scheduling, classifies specific packets in each queue according to service attribute and criticality and checks periodically latency of the packets in each queue. Also, it abandons the packets if some packets stay in queue above schedule time and manages the total amount of traffic stored in queue with certain level.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 1998.10a
• /
• pp.47-50
• /
• 1998

In this study, I investigated a domestic situation of Internet Shopping Mall, its elements and steps for construction. A domestic Internet Shopping Mall have some faults that a consumer cannot look at or touch directly a goods and have some bottlenecks such as a decisive way of a large amount of money, and so forth. On the other hand, it is consisted of 7 elements and its construction is consisted of 5 steps. Accordingly, I investigated the above statements.

• Proceedings of the IEEK Conference
• /
• 2003.07a
• /
• pp.161-164
• /
• 2003

The sharing of caches among Web proxies is an important technique to reduce Web Traffic and alleviate network bottlenecks. Additionally, due to emerging network technologies cooperative Web caching among proxies shows great promise to become an effective approach for reducing Web document access latencies. Nevertheless it is not widely deployed due to the overhead of existing protocols such as ICP. We propose iSCSI-based hierarchical web caching scheme which provides more improved performance than existing web caching scheme.

• Proceedings of the KSR Conference
• /
• 2000.11a
• /
• pp.60-67
• /
• 2000

The success of road haulage, in dominating the surface movement of freight, is now threatened by increased traffic congestion, falling average motorway speeds and rising in logistic costs. As a result, Government as well as companies, which use or operate logistics service, is now looking to rail to provide an alternative. First, we surveyed the bottlenecks and desired betterments to rail transport, which were indicated by rail and road transport users. Through the analysis of customers' needs survey. this paper is focused in the basic framework fur the rail freight transport, which could be helped to promote the efficiency associated with moving freight by rail.

• Electronics and Telecommunications Trends
• /
• v.17 no.4 s.76
• /
• pp.113-122
• /
• 2002

급속한 기술혁신과 변화 속에서 IT 벤처기업은 국가의 경제성장과 발전을 이끄는 원동력으로 작용하고 있다. 정부의 정책적 지원 하에서 벤처기업은 양적으로도 엄청난 규모로 성장하였다. 그럼에도 창업초기에 있는 벤처기업들은 예전과 마찬가지로 그들이 직면한 시장의 비효율성으로 인해 쉽게 어려움에서 벗어나지 못하고 있다. 본 연구는 창업초기 IT 벤처기업들이 겪고 있는 애로요인들을 시장 효율성과 시스템적 관점에서 접근함으로써 IT 벤처기업의 질적 성장을 위한 정책적 해결점을 찾아 보고자 한다.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.28 no.1
• /
• pp.114-120
• /
• 2005

This paper studies procedures for bottleneck detection in closed queueing networks(CQN's) with multiple job classes. Bottlenecks refer to servers operating at $100\%$ utilization. For CQN's, this can occur as the population sizes approach infinity. Bottleneck detection reduces to a non-linear complementary problem which in important special cases may be interpreted as a Kuhn-Tucker set. Efficient computational procedures are provided.