• The Korean Journal of Pain
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• v.8 no.2
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• pp.279-285
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• 1995

Extradural block is a form of treatment described as early as the beginning of the present centuries. It has since had positive criticism from a number of authors in different countries. Epidural injections of steroids with or without local anesthetic have become an occasional method of conservative treatment in sciatica & lumbago, especially in acute case. We assess the results of continuous epidural block with steroids and local anesthetics in sciatica & lumbago. From July 1994 to June 1995, we treated 46 case of lumbago and sciatica using continuous epidural block with steroids and local anesthetics. After placement of 17-Gauge Tuohy needle in the epidural space by the technique of loss of resistance, 0.25% bupivacaine 5 cc and triamcinolone 40 mg was administered and then epidural catheter was placed and connected to multiday infusor(Paragon) using 1% lidocaine with continuous infusion rate of 1 ml/hour. Usually, the catheter was removed after 1~2 weeks and then treated with the physical therapy. At the time of patient's discharge, 69.5% of all cases showed excellent or good results. Of particular note, 26 of the 46 cases were followed up by telephone. At present, in using Of particular note, 26 of the 46 cases were followed up by telephone. At present, in using continuous epidural block procedure, a relief in symptoms showed in 65.5% of these 26 cases. Continuous epidural block provides shortening of the recovery time from pain, avoidance of long period bed rest and early physical therapy and exercise. Therefore, continuous epidural block is simple and safe in the treatment of lumbago and sciatica, especially in acute phase.

• Journal of the Korea institute for structural maintenance and inspection
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• v.15 no.1
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• pp.77-84
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• 2011

This study is to develop nonlinear analysis algorithm for transfer matrix method, which can be applied to continuous beam analysis. Gauss-Lobatto integral rule is adopted and the transfer matrix is derived from stiffness matrix. In the transfer matrix method, the system equation has a constant number of unknowns regardless of number of D.O.F. Therefore, the transfer matrix method has computational efficiencies not only in linear elastic analysis but also in nonlinear analysis. To verify the developed method, the analysis results of several examples are compared with commercial code in moment-curvature, moment-displacement and load-displacement relation.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.725-730
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• 2006

The purpose of this study is on the performance evaluation of horizontally installed GHEX(Geothermal Heat Exchanger, HGHEX) which has been operated for 5 years successfully. Followings are the results. Firstly, in summer season, on Aug. 2000, $33^{\circ}C$ water was flowing out from HGHEX with continuous operating method, and $27{\sim}29^{\circ}C$ with interval operating method on Jul. 2005. But $2.5{\sim}3.0^{\circ}C$ temperature differences are gained from HGHEX. Secondly, in winter season, on Nov. 2000, $25^{\circ}C$ water was flowing out from HGHEX with continuous operating method, and $13{\sim}15^{\circ}C$ with interval operating method on Jan. 2006. But with each operating method, only $0.1^{\circ}C$ and $0.7^{\circ}C$ temperature differences are gained from HGHEX respectively. As the conclusion of this study, at the point of continuos operating method, seasonal balance of heating and cooling loads, and at the point of interval operating method, balance for geothermal restoring time respectively must be considered for better system performances.

• Journal of the Society of Disaster Information
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• v.20 no.3
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• pp.541-548
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• 2024

Purpose: This study aims to compare the grounding methods of transformers currently used in most industrial sites in Korea to analyze the stability of power quality and the risk of electric shock. Method: The ungrounded method allows for continuous power supply even in the event of a single-phase ground fault, resulting in a lower risk of electric shock. In contrast, the solidly grounded method focuses on quickly cutting off power during incidents such as ground faults or lightning strikes to protect load equipment, as explained through literature comparison. Result and Conclusion: It is concluded that the ungrounded method is preferable in environments where continuous power supply is essential.

• Journal of Korea Foundry Society
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• v.30 no.4
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• pp.126-129
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• 2010

• Communications for Statistical Applications and Methods
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• v.3 no.1
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• pp.189-193
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• 1996

In 1992. Boullion obtained the method of the calculus of the moments of discrete probability distributions using differential operator, and he published the method of calculus of the moments. The purpose of this paper is to introduce an idea that this method can be applied to calculate the moments of continuous probability distributions.

• The Journal of the Korea Contents Association
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• v.12 no.8
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• pp.47-58
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• 2012

In this paper, we propose a continuous k-nearest neighborhood query processing method for updating the query results in real-time over mobile peer-to-peer environments. The proposed method disseminates a monitoring region to efficiently monitor the k-nearest neighbor peers. The Monitoring Region is created to assure at least k peers as the result of the query within the time range using the vector of neighbor peers. In the propose method, the monitoring region is valid for a long time because it is calculated by the vector of neighbor peers of the query peer. Therefore, the proposed method decreases the cost of re-processing by monitoring region invalidation. In order to show the superiority of the proposed method, we compare it with the previous schemes through performance evaluation.

• Journal of Korea Spatial Information System Society
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• v.11 no.2
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• pp.79-88
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• 2009

The volume of memory to store real-time data stream is varied dynamically. Continuous queries processing the data stream must manage the storage volume dynamically. In previous research, according to current volume of data a general memory manager which allocates and releases memory by a page unit is researched.However, the method frequently executes page allocation and release to store data stream. Moreover, particularly delayed queries can monopolize many of pages because the method directly allocates pages when a query has not enough memory. Focusing on the problems in memory management systems, this research proposes a memory management method which reduces the frequency of allocation and release and uniformly distributes pages for queries. The method can reduce the frequency of allocation and release through allocation based on utilization ratio of pages in each query and prevent memory monopoly through memory allocation which considers query delay.

• The Transactions of the Korea Information Processing Society
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• v.5 no.6
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• pp.1441-1456
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• 1998

The concept of a hyperpresmtation, as an extension of a hypermedia, is the presentation in which time-varying multimedia presentations are dynamically linked together and a hyperlink's context can be changed over time at any time during a continuous presentation. Problems caused by integrating the hyperpresentation into an existing multimedia system which handles a sequential presentation only are, how to describe the hyperprcsentation, how to set up a hyperlink on a continuous media, and how to check the consistency of the synchronized presentations. In this paper. a new synchronization description method for the hyperpresentation and a method for setting a hyper link on a continuous media during" presentation are proposed after havin!; SHrvey of existing methods, The proposed method deals with only the DC value in a stream ut a DCT based compressed data for checking a condition of te link. Finally, the method for checking the consistency of mixed presentations before actual play of the hnlerpresentation is described. Proposed methods are implemented on MuX(Multimedia IO Server) where a sample scenario is tested.

• Journal of the Korean Society for Precision Engineering
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• v.32 no.1
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• pp.63-68
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• 2015

Micro/nano patterns for optical concentration and diffusion have been studied in the various fields such as displays, optics, and sensors. Conventional micro patterns were continuous and linear shapes due to using linear-type light sources, however, recently non-continuous patterns have been applied as point sources are used for dot-type light sources such as LEDs and OLEDs. In this study, a hybrid machining technology combining an indentation machining method and an AAO process was developed for manufacturing the non-continuous micro patterns having nano patterns. First, mirror-like surfaces ($R_a<20nm$) of pure Aluminum substrates were obtained by optimizing cutting conditions. Then, The letter of 'K' consisting of the arrays of the micro patterns was manufactured by the indentation machining method which has a similar principle to indentation hardness testing. Finally, nano patterns were machined by AAO process on the micro patterns. Conclusively, a specific letter having nano-micro hybrid patterns was manufactured in this study.