• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.119-122
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• 1998

Wireless ATM(WATM) intends to provide a broad range of mobile multimedia services through wireless access by mobility extensions from the fixed ATM-based network. Recently, there have been active researches about new handover techniques to support terminal mobility in WATM. In this paper we classify path reestablishment schemes into full reestablishment, path rerouting with a static COS, path rerouting with a dynamic COS, and path extension. For a backward lossy handover procedure, we analyze and compare the performances of path reestablishment schemes in terms of delay, service disruption time and cell loss.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.226-228
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• 1998

능동 데이터베이스 시스템은 데이터베이스의 상태 변화를 스스로 감지하여 이에 대응한 적절한 조치를 취할 수 있는 데이터베이스 시스템이다. 능동 데이터베이스의 능동성은 사건, 조건, 조치로 구성된 능동규칙에 의해 수행된다. 이와 같은 능동규칙은 데이터의 시간차원 및 공간차원을 포함하지 않는 일반적인 데이터베이스를 대상으로 활발한 연구가 진행되었으나 시간지원 데이터베이스 및 시공간 데이터베이스에 대한 능동규칙의 적용방안 연구는 거의 이루어지지 않고 있다. 따라서 이 논문에서는 시공간 데이터베이스 상에서 동작할 수 있는 능동규칙 연구의 한 부분으로서 시공간 사건을 연구하고 이의 검출 방안에 대해 연구한다.

• Food Science and Preservation
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• v.13 no.3
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• pp.279-284
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• 2006

This study was carried out to investigate the qualities of Saururus chinensis Baill. rhizomes and it content of active ingredient accenting to the storage methods. As the storage period increased the rates of weight loss, rotten rhizomes and the number of sprouts increased. Refrigerator storage resulted in the lowest weight reduction and sprouts rates, while storage in soil-filled box in a store-house was most effective in reducing spoilage rate. Five lignans from rhizome were determined by HPLC Retention time ranged $18{\sim}36$ minutes and showed saucernetin sauchinone, manassantin A, saucerneol D, and manassantin B in that order. Regardless of storage methods, the lignan content was lower after 120 days than after 30 days of storage, and increased manassantin B, manassantin A, saucernetin sauchinone, and saucerneol D in that order.

• Journal of the Korean Arthroscopy Society
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• v.1 no.1
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• pp.132-138
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• 1997

The purpose of this study is to compare the results between conventional and accelerated rehabilitation program following ACL reconstruction using bone-patellar tendon-bone. Conventional rehabilitation focused on protecting the new ligament by blocking terminal extension and avoiding active quadriceps function in the terminal degrees of extension. But there is current trend toward early postoperative mobilization and intensive. so called 'accelerated', rehabilitation stressing hyperextension of the knee. The results of intraarticular ACL reconstruction with conventional and accelerated rehabilitation were prospectively compared for one year postoperatively in a series of 27 patients. Range of motion and thigh circumference were checked preoperatively, and weekly up to 8 weeks, 3 months. 6 months, and 1 year postoperatively. Stress radiologic test, KT-1000 arthrometer. Cybex II dynamometer were checked in preoperatively, and 3 months, 6 months, and 1 year postoperatively. There were no differences of objective stability and restoration of muscle power. But the accelerated group had a low incidence of extension loss. excellent range of motion, and less difference of thigh circumference. We concluded that accelerated rehabilitation program is recommendable due to superiority in terms of range of motion, especially less extension loss without increasing laxity of knee joint.

• Horticultural Science & Technology
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• v.31 no.5
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• pp.633-639
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• 2013

Fungicide applications are required to prevent the strawberry from Botrytis fruit rot and powdery mildew that infect open strawberry flowers, however, their effects of fungicides on pollen germination of strawberry have been rarely documented, particularly those from recently developed active fungicidal ingredients. In this study we have evaluated the effects of 24 commercial fungicidal formulations and 6 organic materials on pollen germination in 3 strawberry cultivars using in vitro assays. Pollens from strawberry had higher germination rates on agar with sucrose of 18% and $25^{\circ}C$ than other tested conditions. Pollen germination rates of cvs. Seolhyang, Maehyang, and Kumhyang at 18% sucrose and $25^{\circ}C$ were 15.3, 18.4 and 30.7%, respectively. Pyraclostrobin, azoxystrobin, kresoxim-methyl, dichlofluanid, iminoctadine tris, and sulfur showed the strongest inhibitory efficacy with the germination rates of more than 93.8% compared to the no-fungicide control. Germination was not significantly affected by simeconazole and procymidone. This in vitro germination study may provide information useful for selecting fungicides in flowering stage to strawberry farmers.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.2
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• pp.488-494
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• 2013

For the activeness and autonomy of a sensor network, the efficient migration method of a mobile agent and the consistent naming services are the required components of a sensor network. Accordingly, this paper presented the implementation of backward migration of an active rule mobile agent applying the naming method based on RMI that used the meta_table including the informations about the components of a sensor network. This study implemented based on the extension of the forward migration[12], and the results of the various experiments present the efficacy of mobile agent middleware system and the possibility of constructing efficient sensor network application environment. And, the results of this study are able to enhance the adaptability on dynamic changes of environment in sensor network application development.

• Smart Structures and Systems
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• v.4 no.5
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• pp.667-684
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• 2008

Numerous devices exist for reducing or eliminating seismic damage to structures. These include passive dampers, semi-active dampers, and active control devices. The performance of structural systems with these devices has often been evaluated using numerical simulations. Experiments on structural systems with these devices, particularly at large-scale, are lacking. This paper describes a real-time hybrid testing facility that has been developed at the Lehigh University NEES Equipment Site. The facility enables real-time large-scale experiments to be performed on structural systems with rate-dependent devices, thereby permitting a more complete evaluation of the seismic performance of the devices and their effectiveness in seismic hazard reduction. The hardware and integrated control architecture for hybrid testing developed at the facility are presented. An application involving the use of passive elastomeric dampers in a three story moment resisting frame subjected to earthquake ground motions is presented. The experiment focused on a test structure consisting of the damper and diagonal bracing, which was coupled to a nonlinear analytical model of the remaining part of the structure (i.e., the moment resisting frame). A tracking indictor is used to track the actuator ability to achieve the command displacement during a test, enabling the quality of the test results to be assessed. An extension of the testbed to the real-time hybrid testing of smart structures with semi-active dampers is described.

• Journal of Biomedical Engineering Research
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• v.18 no.4
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• pp.413-420
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• 1997

In this paper, we analyzed the contraction patterns of active elbow muscles during isometric, concentric and eccentric contraction. The analysis parameters consist of frequency domain parameters (mean frequency, median frequency, peak frequency, peak power, skewness, kurtosis) and time domain paraseters (zero crossing, positive maxima, integrated EMG). The results of this study were as follows; The BR/BB of isometric contraction appeared to be Venter as the elbow joint was more extended. The BR /BB during concentric and eccentric contraction tended to increase with more extension of the elbow joint angle, but there was no significant difference between concentric and eccentric contraction. Further, the EMG power spectrum due to the type of contraction were different betwen eccentric and concentric contraction. According to the results, it was found that the activation pattern in elbow flexor muscles was different during three different muscle contraction pattern. Therefore, elbow flexor muscles should not be considered a single functioning unit. Especially, at the time domain analysis, IEMG is a dominant parameter for analysis of activation patterns, and the skewness kurtosis can be useful parameters in functional recognition for prosthesis control purpose.

• Physical Therapy Korea
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• v.22 no.4
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• pp.1-7
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• 2015

This case report describes the effectiveness of cervical corrective exercises in a patient with cervical radiculopathy (CR) who experienced radicular pain, upper limb paresis, and limited functional activity. A 39-year-old male with cervical radiculopathy performed the cervical corrective exercises for reducing pain. Pain intensity, cervical posture, and active range of motion of cervical intersegmental spine motion were measured baseline, after 4 weeks, and after 8 weeks with self-reported questionnaire and radiographs. After 8 weeks of intervention, the patient demonstrated alleviated radicular symptoms, improved neck posture and active range of flexion and extension of the cervical intersegmental spine. Especially in the angle between the cervical vertebra 6 and 7, the angle was changed from $-4.69^{\circ}$ to $3.30^{\circ}$ during resting position after intervention. The present case indicates that the cervical corrective exercises might be a possible treatment to effectively reduce radicular symptoms, improve neck posture, and active cervical intersegmental motion for patient with CR.

• PNF and Movement
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• v.6 no.1
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• pp.13-20
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• 2008

Purpose : The purpose of this study was to compare the effectiveness of passive stretching, active stretching, and proprioceptive neuromuscular facilitation(PNF) for hamstring flexibility. Methods : Fifty-two college students volunteered for this study. Subjects were randomly devided into three groups : passive stretching, active stretching, PNF. Range of knee extension was measured with the subjects in the 90-90 straight leg raising at before and 1, 2, 3, 4 weeks after intervention. Results : In ROM changes 1st week, 3 groups were significant difference(p<.05). In ROM changes 3rd week, PNF group was significant difference(p<.05). ROM changes 1st week were significantly decreased from ROM changes 2nd week and 3rd week in all 3 groups(p<.05). Conclusions : The results of this study suggest that PNF is more effective method on hamstring flexibility than passive stretching or active stretching.