• 전자공학회논문지
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• 제50권3호
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• pp.9-15
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• 2013

근래 애드혹 네트워크에서 송신 노드가 하나의 안테나만을 가지고 있을 지라도 다수의 수신 안테나로 선형적인 네트워크 throughput에 근접한 값을 얻을 수 있음이 보여졌다. 본 논문에서는 수신 노드에서 채널 상태 정보 (channel state information at reciever, CSIR)가 주어지지 않았을 때, 비모수 기반 선형 평균 제곱오차 (MMSE) 수신기를 사용하여 안테나 수에 비례하는 선형 이득을 얻는 수신 기법을 제안한다. 제안하는 방법에서는 간섭과 노이즈의 공분산에 관심 있는 채널 정보를 포함하여 전송률의 손실 없이 최적의 MMSE 전송 용량에 근접한 결과를 얻는다. 네트워크 전송 용량에 대한 분석과 모의실험을 통해 제안하는 비모수 기반의 선형 MMSE 수신 기법이 기존의 알고리즘들보다 우수한 성능을 가질 수 있음을 확인할 수 있다.

• 대한물리의학회지
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• 제14권4호
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• pp.115-123
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• 2019

PURPOSE: This study compared the scores of the Mini-Mental State Examination-Korean version (MMSE-K) and Korean version Montreal Cognitive Assessment (K-MOCA), which assess cognitive function, the Fugl- Meyer Upper-Extremity Assessment (FMA), which assess the upper extremity function; and Modified Barthel Index (MBI), which that assesses activities of daily living among patients receiving inpatient treatment following a diagnosis of stroke to determine the correlations among MMSE-K, K-MOCA, FMA, and MBI. METHODS: The study assessed the cognitive function using the MMSE-K and K-MOCA, upper extremity function using FMA, and activities of daily living using MBI. The data were analyzed using Pearson's correlation analysis and multiple regression analysis. RESULTS: An analysis of the differences in the MMSE-K, K-MOCA, MBI, and FMA scores according to the affected side, revealed differences in the, K-MOCA scores according to the affected side, where patients with right hemiplegia showed better cognitive function (p <.05). Correlation analysis among MMSE-K, K-MOCA, FMA, and MBI Showed significant correlations (p <.05). The results indicate that those with higher cognitive and upper extremity functions had higher performance of activities of daily living. CONCLUSION: The cognitive and upper extremity functions were correlated with the activities of daily living in stroke patients. Accordingly, applying physical therapy with a focus on improving the cognitive function and training activities of daily living could assist in the functional recovery of stroke patients significantly.

• 재활간호학회지
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• 제11권2호
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• pp.90-98
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• 2008

Purpose: The purpose of this study was to examine the cognitive function and degree of dementia patient by doing clock drawing test and to explore the relationship among other dementia screening test. Method: The study subjects were 94 dementia in patients department. The data was collected by face to face interview by clinical psychologist from January 2007 to February 2008. The tools were Clock Drawing Test, K-MMSE, K-3MS and CDR Scale. Results: 1) The average score of CDT was 5.13 (2.54), of K-MMSE was 20.53 (4.85), of K-3MS was 61.66 (16.46), and of CDR was 1.2 (.72), those scores showed dementia. 2) There was a statistically the significant difference in CDT (F=2.83, p=.043) and CDR (F=2.00, p=.008) by age. CDT has shown the differences by gender (t=-2.42, p=.018) and education (F=7.66, p=.000). 3) There were significant relationships between CDT and K-MMSE (r=-.294. p=.004), K-3MS (r=-.335, p=.001), and CDR (r=.286, p=.008). Conclusion: It is believed that using CDT which measures the visuospatial ability of dementia patients and K-MMSE which assesses an ability of language and orientation and K-3MS at the same time helps examining the beginning and the progressive degree of dementia more easily and objectively.

• 대한물리치료과학회지
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• 제7권2호
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• pp.495-502
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• 2000

Objectives: The aim of this study was to analyze the effect assesssment and related factorson cognitive function in the Elderly. Methods: Korean version of MMSE-K was tested for 40normal in the Elderly in July 15-20 2000. Their ages were 65 or more in years. Results: Age, sex, marriage and education had significant effects on the MMSE-K scores(P<.05). MMSE-K as follow definite dementia$(\geq24)$ is 47.5%, definite non-dementia$(\leq19)$ is 40.0%, and questionable dementia(20-23) is 12.5% in distributions for cognitive function, respectively. Conclusions: Results indicated that age is increased and female at onset had high cognitive functions.

• 한국산학기술학회논문지
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• 제14권1호
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• pp.312-320
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• 2013

본 연구는 지역사회 노인을 대상으로 국내에서 사용되는 인지기능 검사인 LOTCA-G 및 MMSE-K와 MoCA-K와의 상관관계를 통해 경도인지장애를 탐지하는 데 사용되는 MoCA-K의 유용성을 알아보고자 하였다. 50명을 대상으로 한 각 평가도구들의 인지기능 점수는 MoCA-K가 30점 만점 중 $22.72{\pm}5.85$, LOTCA-G는 104점 만점 중에 $96.28{\pm}6.82$, MMSE-K는 30점 만점 중 $25.08{\pm}3.78$점이었다. 대상자들의 일반적 특성에 따른 각 평가도구들의 점수를 알아본 결과, 세 개의 평가도구 모두 남녀 간에는 유의한 차이가 없었으며, 연령과 교육수준에 따라서는 유의한 차이를 보였다. 노인들의 치매 선별검사로 널리 사용되고 있는 신뢰성과 타당성이 확보된 MMSE-K 및 LOTCA-G의 수행점수와 MoCA-K 수행점수 간에 높은 상관관계가 나타났으므로 MoCA-K는 노인들의 인지기능을 평가하는 데 있어 타당한 인지검사도구라는 것을 확인할 수 있다.

• 대한임베디드공학회논문지
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• 제15권3호
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• pp.111-118
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• 2020

We investigate the optimization problem of transmit power control and MMSE Receiver filter for multi access points environment. Previous work showed that increasing the number of access points decreases the transmit power consumption. Accordingly, transmit power control algorithm was developed in such a way that the transmit power is minimized, while each terminal meets Signal to Interference and Noise Ratio Requirement. In this work, we further reduce the transmit power consumption by optimizing the transmit power level and the MMSE receiver filter together. We showed that the proposed joint optimization algorithm satisfies the necessary and sufficient conditions to be standard interference function, which guarantees convergence and minimum transmit power consumption. We observed that the proposed algorithm outperforms the algorithm which only optimizes the transmit power.

• 대한약침학회지
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• 제11권4호
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• pp.59-64
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• 2008

Objectives The aim of study was to evaluate the effect of Herbal medicine on post stroke cognitive deficit. Methods All groups were treated with acupunture treatment, moxa treatment, herbal medicines, physical and occupational therapy for 4 weeks, additionally cardiotonic pills(CP) were taken in the cardiotonic pills group. The effect of treatment was assessed using Verval fluency, MMSE-KC, Word List Immediate Recall test. Statistical significance was achived if the probability was less than 5%(p,0.05). Results Verval fluency, MMSE-KC, Word List Immediate Recall test scores increased in both group. MMSE-KC, Word List Immediate Recall test scores were significantly increased in the CP group. Verval fluency, MMSE-KC, Word List Immediate Recall test scores were significantly increased in the control group. In the Verval fluency, MMSE-KC, Word List Immediate Recall test of the CP group more increased compared to the control group. There were no significant differences between two groups. In the CP group, the scores of the infarction group more increased compared to the hemorrhage group. Conclusions According to the these results, herbal medicines are effective to improve post stroke cognitive-deficit. Futher studies are needed to know cardiotonic pills in the ischemic stroke.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2010년도 추계학술대회
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• pp.219-222
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• 2010

OFDM시스템의 대안으로, SC-FDE시스템은 주파수 선택적 페이딩 환경에서 구현상의 복잡도가 크지 않으면서 낮은 PAPR로 다중 경로 지연에 의한 영향을 완화시키기 위한 기술로 연구되어 왔다. SC-FDE시스템에서 보호 구간으로 PN신호를 훈련 심볼(Training Sequence)로 둠으로써 CP에 비해 빠른 동기화와 채널 추정에 사용될 수 있는 장점이 있으며, 채널 추정을 위해 Correlation과 LMS기법을 동시에 적용함으로써 에러가 최소가 되기까지 수렴 시간을 줄일 수 있다. 본 논문에서는 PN시퀀스를 기반으로 추정한 채널 값으로, ISI를 효과적으로 제거할 수 있는 MMSE-FDE 등화 기법을 제안한다. SFN 채널 환경과 같이 스펙트럼 널이 강한 다중 경로 페이딩환경에서 ISI를 선 제거 하는 ISI cancellation 기법을 통해 정확한 SNR추정을 할 수 있고, 이를 통해 MMSE-FDE 등화 성능을 향상 시킬 수 있다.

• 한국음향학회:학술대회논문집
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• 한국음향학회 2001년도 추계학술발표대회 논문집 제20권 2호
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• pp.125-128
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• 2001

본 연구에서는 음성신호의 왜곡에 대해 음성 부재 확률을 고려한 MMSE(Minimum Mean Square Error) STSA(Short-Time Spectral Amplitude Estimator)를 전처리기로 도입하여 HMM(Hidden Markov Model)에 기반 한 음성인식시스템의 인식성능을 평가하였다. 음성인식 시스템의 실시간 구현을 고려하여, MMSE STSA 기법을 음성개선을 위한 전처리기로 사용할 때 MMSE STSA의 이득계산 과정에서 많은 계산량이 요구되는 modified Bessel 함수를 근사 화하여 사용하였다.

• The Journal of Korean Physical Therapy
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• 제12권2호
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• pp.83-93
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• 2000

29 dementia patients over 60 years of no in the nursing home were assigned to execute rehabilitation program a month for 3 months. 1 evaluated MBI scores and MMSE scores and analyzed correlation between both scores. Analyses of results were as follows : 1. In the experimental group with rehabilitation program. ADL and cognitive function were improved significantly(p<0.05). 2. In the control group with no rehabilitation program. ADL was decreased significantly(p<0.05), cognition was not changed (pgt;0.05). 3. There were significant rises in MBI scores and MMSE scores in the experimental group(p<0.05). 4. There was a significant fall in MBI scores in the control group(p<0.05). a no change in MMSE scores in the control group(p>0.05). 5. There was strong correlation between ADL and cognition in the experimental group and the control group. 6. Inverse correlation revealed between the experimental group and the control group in ADL. 7. Inverse correlation revealed between the experimental group and the control group in cognition.