• 한국지능시스템학회논문지
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• 제20권5호
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• pp.701-709
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• 2010

본 논문에서는 영상간의 거리에 반비례하고 상관성에 비례하는 조합형 유사성 척도에 의한 효율적인 서명인식 방법을 제안하였다. 여기서 거리는 영상의 공간적 속성을 반영하기 위함이고, 상관성은 통계적 속성을 반영하기 위함이다. 이렇게 하면 서명의 위치, 크기, 회전과 같은 기하학적 변화와 모양변화에 강건한 인식이 가능하다. 상관성의 척도로 이진영상의 히스토그램에 기반을 둔 4 방향의 위치를 고려한 정규상호상관계수를 이용함으로써 서명사이의 유사성을 좀 더 빠르고 정확하게 반영하였다. 제안된 방법을 20개의 288$\times$288 픽셀 트럭영상과 105개의 256$\times$256 픽셀의 서명영상을 대상으로 각각 실험한 결과, 영상의 속성을 잘 반영한 우수한 인식성능이 있음을 확인하였다. 특히 정규상호상관계수와 순서값의 거리를 조합한 척도가 city-block이나 Euclidean 거리를 각각 조합한 척도보다 우수한 인식성능이 있음도 알 수 있었다.

• 대한물리치료과학회지
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• 제30권3호
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• pp.14-22
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• 2023

Background: This study was to investigate the relationship between scapular downward rotation ratio (SDRR), lower trapezius (LT) muscle, and rounded shoulder angle (RSA) on each side in subjects with scapular downward rotation syndrome (SDRS). Design: Cross-sectional Study Methods: Fifteen subjects have participated in this study. The RSA and SDRR were assessed using a tape measure in standing posture. The RSA was computed by the angle made by two lines: one was the distance between the root of the scapula and the acromion, and the other was the distance between the acromion and the horizontal line in the root of the scapula. The SDRR was computed by two horizontal lines: one was the distance between the mid-line and root of the scapula, and the other was the distance between the mid-line and inferior angle of the scapula. LT muscle strength was performed in a prone position by the hand-held dynamometer. Results: There was a positive correlation between SDRR and LT strength in the less affected sides (r=.59; p=.02), however, there was no correlation between RSA and LT strength in the more affected sides (p>.05).

• 한국지능시스템학회논문지
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• 제22권4호
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• pp.414-424
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• 2012

문제 인스턴스 탐색 혹은 자동 생성은 알고리즘 분석 및 테스트에 적용될 수 있으며, 하드웨어, 소프트웨어 프로그램, 계산 이론 등 다양한 수준에서 연구되어온 주제이다. 본 연구에서는 해(解) 공간에 사용된 목적값-거리 상관관계 분석을 문제 인스턴스 공간에 적용하였다. 문제 인스턴스의 목적값은 문제에 따라 알고리즘의 수행 시간과 최적해를 잘 구하는 정도로 정의하였다. 이러한 정의는 문제 인스턴스의 난이도로 해석할 수 있다. 상관관계는 3가지 측면에서 분석하였다: 첫째, 알고리즘과 거리 함수에 따른 상관관계 차이, 둘째, 알고리즘의 개선 전/후의 상관관계 변화, 셋째, 문제 인스턴스 공간과 해당 문제의 해 공간 사이의 연관성. 본 논문은 문제 인스턴스 공간에 상관계수 분석이 어떻게 적용될 수 있는지 보여주며, 문제 인스턴스 공간 분석을 본격적으로 다루는 첫번째 시도이다.

• 한국지리정보학회지
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• 제8권4호
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• pp.52-60
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• 2005

본 연구에서는 부산시의 대표적인 주거지역이면서 워터프런트지역을 포함하고 발전해 온 수영구와 해운대구를 중심으로 지가와 주거환경요소의 상관성 및 주거환경요소가 지가에 미치는 영향을 고찰해 보고자 했다. 이를 위해 지가를 종속변수로 하고 주거환경요소를 설명변수로 하여 상관분석 및 회귀분석을 실시하였다. 먼저 지가와 각 변수간의 상관성을 보면 모든 대상지역에서 토지이용과 간선도로와의 거리, 지하철역까지의 거리가 공통적으로 지가와 상관성이 높은 변수로 밝혀졌고, 회귀분석을 통해 각 변수별 설명력을 알아본 후 지가에 대한 변수의 설명력이 높은 순으로 누적 설명력을 살펴본 결과 7개의 변수로 수영구는 67%, 해운대구는 50.5%의 설명력이 있는 것으로 드러났다. 또한 본 연구에서 특히 관심을 가지고 설정해 본 해안까지의 거리변수는 지가와 상관분석 결과 모든 대상지역에서 그다지 상관성이 높지 않았으며, 회귀분석 결과에서도 각 지역별로 6.4%~7.6%의 설명력을 갖는 것으로 밝혀져 지가를 설명하는 변수로서 중요도도 높지 않은 것으로 나타났다.

• 한국소음진동공학회논문집
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• 제26권5호
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• pp.609-615
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• 2016

Measuring similarity between two signals is a key element of the location template matching (LTM) method which is one of impact source localization technique. As a measure of similarity, the correlation coefficient is most widely used, and the group delay based method is recently proposed to improve the accuracy of finding the impact source. In practice, the LTM method assumes that the similarity between two signals decreases as the distance between two corresponding impact points increases, where the distance between two neighboring impact points defines the grid spacing. In this paper, it is shown that this assumption is not always true but the correlation coefficients fluctuate forming a main robe and many side robes as the distance between two neighboring impact points increases. On the other hand, the standard deviation of group delay sharply increases with a small increase of the grid spacing. These are demonstrated by using a simple cantilever beam. Based on these findings, an optimal way of implementing the LTM method may be suggested by combining the correlation coefficient and the group delay based approaches.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제32권2호
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• pp.161-167
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• 2006

Objectives: Pericoronitis was the most common indication for mandibular third molar surgery and there are no universally acceptable predictive criteria for pericoronitis occurrence. This study was designed to analyze the correlation of the pericoronitis and the eruption state of the mandibular third molar using panoramic radiographs statistically. Materials and Methods: 218 patients whose chief complaint was the extraction of the mandibular third molar were examined. The presence and absence of pericoronitis, age, sex, position of extraction site, angulation, impaction degree, position to the anterior border of mandibular ramus, distance between distal cementoenamel junction of second molar and mesial cementoenamel junction of the mandibular third molar were assessed. Then the correlation of pericoronitis and the eruption state of the mandibular third molar were analyzed by Student's t-test and chi-square test. Results: There was no correlation between Pericoronitis and age, sex, position of the mandibular third molar. The angulation(P=0.005), impaction degree(P=0.043), relation with anterior border of mandibular ramus(P=0.003), distance between distal cementoenamel junction of second molar and mesial cementoenamel junction of the mandibular third molar(P<0.05) were correlated with pericoronitis. Conclusions: The occurrence of the pericoronitis can be predicted by the eruption state of the mandibular third molar such as angulation, impaction degree, relation with anterior border of mandibular ramus, distance between distal cementoenamel junction of second molar and mesial cementoenamel junction of third molar.

• PNF and Movement
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• 제8권1호
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• pp.67-77
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• 2010

Purpose : The purpose of this study was to investigate the usefulness of clinical balance tests through the correlation of balance evaluation using by forceplate in elderly. Methods : Thirty nine healthy elderly subjects (14 males, 25 females) participated in the study. The subjects were evaluated with clinical balance tests [(Berg balance scale (BBS), Functional reach test (FRT), Tinetti's performance oriented mobility assessment (POMA), and one leg standing (OLS)]. Static balance evaluation was assessed by using forceplate. Center of pressure (COP) parameters were obtained using it as total path distance, total sway area, X mean frequency and Y mean frequency for 20 seconds in the following conditions: (1) comfortable standing with eyes opened and closed, (2) uncomfortable standing with eyes opened and closed. After static balance evaluation tested, dynamic balance evaluation was assessed. COP parameters were error distance and area during sine curve trace. COP parameters were movement time, error distance, and maintained time in the circle during COP movement task. Results : Clinical balance tests showed statistically significant correlation between static and dynamic balance evaluations. Among the clinical balance tests, the BBS, POMA, and OLS showed significant correlation with to assess the balance ability of elderly in clinical setting both evaluations. Conclusion : Clinical balance tests can be recommended in clinical setting because of low costs and simplicity.

• 간호행정학회지
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• 제20권5호
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• pp.505-513
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• 2014

Purpose: The purpose of this study was to identify factors affecting the social distance between minority groups and nursing cadets. Methods: A cross-sectional survey design was used. A questionnaire was distributed to the entire Armed Forces Nursing Academy cadets. Data from 273 nursing cadets were analyzed using t-test, ANOVA, Pearson correlation coefficients and Stepwise multiple regression. Results: Social distance had positive correlations with collective identity (r=.28) and multiculturalism (r=.37). A negative correlation was found between social distance and perceived threat (r=-.38). Perceived threat, multiculturalism, collective identity, and frequency of contact with minorities were identified as factors affecting the social distance. The model explained 24% of the variables. Conclusion: To effectively respond to the minority groups' nursing needs in the army, educational programs which help to reduce the perceived threat, to strengthen multiculturalism, and to establish a healthy collective identity of nursing cadets need to be developed.

• Journal of Oral Medicine and Pain
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• 제23권4호
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• pp.457-473
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• 1998

This study was performed to investigate the morophological and positional correlation between the upper cervical vertebra, the oral structures and the pharyngeal tissues, and the correlation of these anatomical structures with dental features, such as teeth wear area nad tooth contact status, etc. Seventy patients with temporamandibular disorders and sixty three dental students without any signs and symptoms in head and neck region were selected for this study. All they had natural dentition without any fixed and removable protheses. Teeth wear area and arch width wre measured from the upper dental cast, tooth contact status were observed by T-Scan system$^\textregistered$ and four cephaloradiograpohs were taken from four head postures, namely, natural(NHP), forward(FHP), upward(UHP), and downward head postiure(DHP). 22 cephalometric items were measured on the films and the data were processed with SAS statistical program. The result of this study were as follows : 1. In normal group, angle of cervical vertebra tangent and of between hard and soft palate were broader in female subjects than those in male subjacets, but distance from subocciput to axis, size of soft palate, and pharyngeal space width were larger in male subjects. 2. In normal group with natural head posture, the items correlated each others from the three anatomical regions were distance between first nad second vertebra in posterior part, distance from the lingual surface of lower anterior teeth to anterior surface of soft palate, and distance from the hyoid bone to third vertebra. 3. Three set of items showed significant correlation each other in the four head postures in normal group. First set was the angle between hard and soft palate and the idstance from subocciput to posterior arch of first vertebra, second set was the distance between first and second vertebra in posterior part and the teeth wear area, third set was number and force of tooth contact and length of soft palate and distance from anterior tip of hyoid bone to mandibular plane.

• The Journal of Korean Physical Therapy
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• 제29권5호
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• pp.281-286
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• 2017

Purpose: The purpose of this study was to examine the correlations among the resting physical factors related to a six-minute walk test (6MWT) and to determine the effects of the resting physical factors on the distance and intensity related to the 6MWT in healthy female subjects. Methods: A total of 43 healthy female subjects ($22.84{\pm}3.90yrs$) participated in this study. They performed the 6MWT, and the physical factors related to the 6MWT were assessed. SPSS 20.0 was used to analyze the data, and the mean and standard deviation were calculated, and the collected data were analyzed by the Pearson's correlation coefficient (among physical factors related to 6MWT) and independent t-test (between six-minute walk distance [6MWD] groups and six-minute walk intensity [6MWI] groups). Results: The 6MWD had a significant negative correlation with the resting HR (beat/min) in healthy female subjects (r=-0.49, p<0.05). The 6MWI had a significant negative correlation with the resting systolic blood pressure (SBP) (r=-0.45, p<0.01). A comparison of the 6MWD revealed the long distance group (LDG, 700-799 m) to be significantly higher than the middle distance group (MDG, 600-699 m) in the 6MWI (%), %predicted distance (%), predicted VO2max (mL/kg/min), resting HR (beat/min), and resting SBP (mmHg)(p<0.05). In the comparison of 6MWI, the moderate intensity group (MIG, 64-75%HRmax) was significantly lower than the low intensity group (LIG, 50-63%HRmax) in the resting SBP (mmHg) (p<0.05). Conclusion: These results suggest that the resting physical factors are related to the 6MWD and 6MWI of the 6MWT in healthy females. In particular, SBP is associated with not only the 6MWD but also the 6MWI in 6MWT.