• 대한전자공학회논문지TC
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• 제46권8호
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• pp.22-33
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• 2009

모바일 애드혹 네트워크는 유선 환경 기반구조의 도움없이 이동 노드에 의해 자치적으로 자가조직되는 구조이다. 이동 노드가 모바일 애드혹 네트워크를 구성하기 위해서는 라우팅 정보같이 네트워크의 관리에 필요한 정보들이 이동 노드들 간에 자치적으로 전달되는 특성으로 인해 네트워크의 보안이 중요한 주제이다. 특히 네트워크를 구성하는 이동 노드들이 서로를 신뢰 하는데 기반이 되는 인증 메커니즘은 필수적이다. 우리는 [1]에서 분산된 이동 노드들 간의 효율적인 인증을 위하여 랜덤 그룹을 이용한 인증 메커니즘을 제안하였다. 이 논문에서는 [1]에서 제안한 메커니즘의 성능을 분석하고 그 결과를 시뮬레이션 결과와 비교하였다 성능 분석 결과는 모바일 애드혹 네트워크를 구성하는 이동노드나 CA의 수에 상관없이 랜덤 CA 그룹의 크기가 10-12일 때, 최저의 비용으로 인증 메커니즘이 동작함을 보여주며, 추후 분산 인증 체계에서 공개키 방식을 적용하는 경우의 분석 모델로 활용될 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권2호
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• pp.832-854
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• 2019

Action recognition has been studied in computer vision field for years. We present an effective approach to recognize actions using a dimension reduction method, which is applied as a crucial step to reduce the dimensionality of feature descriptors after extracting features. We propose to use sparse matrix and randomized kd-tree to modify it and then propose modified Local Fisher Discriminant Analysis (mLFDA) method which greatly reduces the required memory and accelerate the standard Local Fisher Discriminant Analysis. For feature encoding, we propose a useful encoding method called mix encoding which combines Fisher vector encoding and locality-constrained linear coding to get the final video representations. In order to add more meaningful features to the process of action recognition, the convolutional neural network is utilized and combined with mix encoding to produce the deep network feature. Experimental results show that our algorithm is a competitive method on KTH dataset, HMDB51 dataset and UCF101 dataset when combining all these methods.

• 대한한의학회지
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• 제31권1호
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• pp.1-13
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• 2010

Objective: Functional dyspepsia is a prevalent disease. It impedes subjective quality of life. The purpose of this study was to examine the equivalent effect of herb medicine treatment (DA-9701) for functional dyspepsia. Methods: In this randomized, single-blinded, placebo-controlled study, we compared a herb medicine (DA-9701) with standard treatment (mosapride) and placebo for the treatment of functional dyspepsia. 42 volunteers who satisfied the requirements were enrolled in study. Severity of dyspepsia was measured by Nepean Dyspepsia Index (NDI) and Functional Dyspepsia Quality of Life (FD-QOL) before and after treatments. Results: 1. In the DA-9701 group, total key symptoms score was significantly lower and improve rate of key symptoms was higher than in the mosapride and placebo groups, but there were no statistically significant differences between three groups. 2. In the DA-9701 and mosapride groups, "nausea" and "bad breath" were significantly lower compared with the placebo group. 3. In the DA-9701 group, NDI Quality of Life scores were significantly higher, but there were no [other] statistically significant differences between the three groups. 4. In the DA-9701 and mosapride groups, FD-QOL scores were higher compared with the placebo group, but there were no statistically significant differences between the three groups. Conclusion: Herb medicine treatment (DA-9701) is effective to improve the symptoms and quality of life in patients with functional dyspepsia.

• 한방재활의학과학회지
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• 제21권2호
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• pp.203-210
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• 2011

Objectives : The aim of this study is to establish evidence-based guideline on infrared therapy on acupoints. Methods : We investigated all the articles in websites including Pubmed, China national knowledge Infrastructure(CNKI) and medical journals authorized by national research foundation of Korea. The key words are acupoints and infrared. For the first time, we withdrew some papers no relationship to key words by reading titles and abstracts. In the second, we only selected randomized clinical trials(RCT) published from 2000 to 2010. Results : Out of 62 papers, only 2 RCT were analyzed. One (RCT 1) was about depression patients with insomnia(jadad score: 1). The other(RCT 2) was about urimic pruritus patients(jadad score: 5). In RCT 1, experimental group was significantly better than control group. In RCT 2, there was not statistical signification between two groups. Conclusions : In reality, there were not many papers on infrared therapy applications. Further study just like RCTs may be needed to establish evidenced-based guideline on infrared.

• Physical Therapy Rehabilitation Science
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• 제1권1호
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• pp.1-5
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• 2012

Objective: Dual-task walking deficits impact functional daily life, which often requires walking while performing simultaneous tasks such as talking, thinking or carrying an object. This study is to find out the latest trend of dual-task training's influence on ambulatory abilities of a stroke patient. Design: Systematic review of randomized controlled trials. Methods: This literature review was conducted in Pubmed and Sciencedirect with the follwing key words:stroke, cerebro-vascular accident, hemiplegia, gait, rehabilitation, exercise. 7 studies were chosen in findings by search tool. 3 studies were case study, 3 studies were cross sectional observational study and 1 study was randomized controlled trial. Results: It was found that stroke patients have difficulties in doing 2 motor tasks simultaneously and when they do 2 tasks, one is done in a naturally preferred activity areas. Moreover, when simply applying dual-tasks, the walking speed decreased. Meanwhile, when applying them through training, the speed increased. This showed the improvement of effective task-implementation abilities after dual-task training using task-integration models. Conclusions: In the beginning of the 2000s, dual-tasks were implemented by simply combining walking and cognition or exercise task, and the results of this study suggest that subjects with stroke have difficulty performing dual task. However, the latest trend is to let patients do the dual-task training by combining it with virtual reality. Therefore, dual task training could be performed in a safe in the environment such as virtual reality or augment reality.

• 대한한방소아과학회지
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• 제29권4호
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• pp.119-126
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• 2015

Objectives The purpose of this study is to investigate recent clinical studies on effect of acupuncture for Autism Spectrum Disorder in other countries. We have analyzed the studies on effect of acupuncture for Autism Spectrum Disorder within randomized controlled trail (RCT) for 6years (from 2010 to 2015). Methods The search database includes Medline, Embase, Cochrane library and CNKI (China National Knowledge Infrastructure). To narrow the search, the following key search terms were used: 'autism or ASD or Asperger's Syndrome or pervasive developmental disorder, acupuncture'. The search was limited to the publication date from 2010 to 2015. 7 control studies in Medlin, Embase, Cochrane library and 5 control studies in CNKI were selected for analysis. Results and Conclusions 1. The acupuncture and rehabiliation treatment is more effective than only acupuncture treatment. Especially, Retention of needling is helpful. 2. It is necessary to set up standard scale in assessment of ASD patients and serum arginine-vasopressin (AVP) can be substitution. 3. Head acupuncture and tongue acupuncture is effective for ASD.

• Korean Journal of Acupuncture
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• 제25권2호
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• pp.57-69
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• 2008

Objectives : To review the controlling methods used in RCTs (randomized controlled trials) of auricular acupuncture. Methods : To investigate the controlling methods used in clinical trials of auricular acupuncture, 46 articles were retrieved from PUBMED (from August 1976 to August 2007, with limits: english, clinical trial) using the key words of "ear acupuncture", "auricular acupuncture", "auriculo-medicine", and sorted out according to the types of control treatments. Among them, 10 articles were selected based on STRICTA (Standards for Reporting Intervention in Controlled Trials of Acupuncture), and the controlling methods used in those articles were reviewed. Results : In clinical trials of auricular acupuncture, 'sham acupoints (non-acupoints and non-treatment acupoints included)', 'minimal acupuncture', 'pseudo-intervention', and 'placebo devices' have been used as controlling methods, but their 'inactivity' have been in question. To compensate the disadvantages of 'minimal acupuncture', and 'pseudo-intervention' control, placebo auricular acupuncture needles have been developed, although these needles didn't satisfy the conditions of 'blinding' and 'physical inactivity' simultaneously. Conclusions : Further researches on 'sham acupoints' and new development of 'placebo auricular acupuncture needles' are needed.

• 대한한방소아과학회지
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• 제26권1호
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• pp.46-59
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• 2012

Objectives The purpose of this study is to investigate recent clinical studies on effect of acupuncture for rhinitis in other countries. We have analyzed the studies on effect of acupuncture for rhinitis within randomized controlled trial(RCT), reviewed for 11 years (from 2001 to 2011). Methods The search database includes PubMed. To narrow the search, the following key search terms were used: 'rhinitis, acupuncture'. The search was limited to the publication date from 2001 to 2011. Results Total 20 studies were selected: RCT(13), review(5), case report(1), and cost effectiveness study(1). In RCT, 9 studies used acupuncture only, and 8 studies of them have revealed that acupuncture is effective on rhinitis. In review, 3 studies are systematic review, 2 studies are no systematic review. Among systematic review, 2 studies have revealed partial effectiveness of acupuncture for rhinitis, but they suggested the necessity of further studies. Conclusions Domestic studies on effect of acupuncture for rhinitis are necessary. For more accurate results, controlled, large scale and well designed studies are recommended.

• 대한한방소아과학회지
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• 제30권2호
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• pp.23-30
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• 2016

Objectives The purpose of this study is to investigate recent clinical studies on effect of acupuncture for strabismus in Korea and other countries. We have analyzed 10 years (from 2006 to 2015) of case studies and randomized controlled trials (RCT) on effect of acupuncture for strabismus. Methods The search database includes Oasis, KTKP (Korean Traditional Knowledge Portal), Medline, Embase, and Cochrane library. To narrow the search, the following key search terms were used: 'strabismus, acupuncture'. The search was limited to the publication date from 2006 to 2015. 7 case studies and 5 control studies were selected for analysis. Results and Conclusions 1. The acupuncture treatment is effective for paralytic strabismus 2. The studies used BL1, GB1, ST2, TE23, GB15, EX-HN5, ST1, and LI4 acupoints and also an electroacupuncture treatment, which is 15 minutes of extraocular muscle stimulation, was used. 3. Degree of strasbismus was tested by Ocular motor range test, Corneal light reflex test, Ocular abducent scale test (Scott and Kraft, Diploptic range test).

• Physical Therapy Rehabilitation Science
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• 제2권1호
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• pp.1-6
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• 2013

Objective: The aim of this review is to explore the latest intervention trends and effects of EMG-triggered functional electrical stimulation on the upper extremity functions in stroke patients. Design: Systematic review on clinical trials. Methods: A systematic literature search was performed to identify clinical trials evaluating the effects of EMG-triggered functional electrical stimulation (EMG-FES) and task-oriented EMG-triggered FES on the hand functions in stroke patients. Literature review was conducted with the following key words: hand function, functional electrical stimulation, task-oriented, stroke. Results: Ten clinical trials were included; 8 of them were randomized controlled trial, 1 was block-randomized, and 1 was a pre-post comparison study. A positive effect of electrical stimulation was reported in the patient groups that were treated with functional electrical stimulation combined with specific tasks, and volitional muscle contraction-triggered stimulation that was synchronized with tasks. Motor capabilities of the hand and arm were improved after the rehabilitation. Conclusions: EMG-triggered electrical stimulation may be more effective than non-triggered electrical stimulation in facilitating the hand functions in stroke patients in terms of muscle strength and voluntary muscle contraction of the paretic hand and arm. Triggered electrical stimulation can be even more effective when it is combined with specific tasks.