• 대한족부족관절학회지
• /
• 제19권4호
• /
• pp.161-164
• /
• 2015

Purpose: The purpose of this study is to define the geographic patterns of partial avascular necrosis (AVN) of the talar body and to determine whether there were any predictors of both the location and occurrence of partial AVN. Materials and Methods: Nineteen patients with fracture of the talar neck treated by open reduction and internal fixation and followed up for more than 1 year were analyzed. The radiographs were examined 6 to 8 weeks after the operation for Hawkins sign and if it was not observed, magnetic resonance scans were performed. The three-dimensional analysis was performed using Mimics 17.0 (Materialise). The incidence of collapse and time to operative intervention was recorded. Results: Partial AVN of the talar body was observed in six out of 19 patients. The avascular segment of the talar body was located predominantly in the anterolateral portion. The average volume of the avascular segment was $289mm^3$, and it occupied 1% of total volume of the talus, and 10% of the talar dome. Collapse occurred in one patient in the area of the avascular process. There were no observable trends with regard to Hawkins classification, incidence of collapse, or time to operative intervention to the location of the avascular segment. Conclusion: Partial AVN can occur after fracture of the talar neck. The predominant location of the avascular segment was the anterolateral portion of the talar body. This information may be helpful to understanding the process of avascular necrosis of the talar body.

• 한국조리학회지
• /
• 제23권5호
• /
• pp.109-120
• /
• 2017

This study aimed to develop Chinese restaurant set menu which was proper to tendency of market segmentation by using conjoint analysis. In order to examine tendency of market segmentation, this study investigated the important factors and effective values of whole market and segment market. First, the study found that whole market and segment market seemed to prefer seafood to meat except Cluster 3 (Gentle demand type). Second, regarding efficiency of attribute level, the study found that crap soup is favored over seafood in both whole market and segment market except Cluster 1 (strong demand type). Third, Cluster 1 (strong demand type) showed a high level of efficiency on menu which is mixed with meat and seafood. In Cluster 2 (middle demand type), there was a high level of efficiency in meat menu. In case of Cluster 3 (gentle demand type), seafood menu showed high level of efficiency. Forth, there was a high level of efficacy in rice and western dessert menu on the result of analysis on whole market and segment market. Therefore, this study suggests that the preference of seafood is more higher than the preference of meat. It means that current customers care their health more than they used to be. According to this study, people who want to develop Chinese restaurant menu should focus on seafood more than meat. What's more, marketers of chinese restaurants have to not only present new awareness and fresh atmosphere but also provide typical composition of set menu for target customers.

• 대한한방내과학회지
• /
• 제19권2호
• /
• pp.7-16
• /
• 1998

Background and Purpose The increasing evidence for neurally mediated cardiac damage and sudden death has focused attention on the central autonomic control of cardiac function. Power spectral analysis of heart rate variability(HRV) can detect autonomic consequences of stroke. We performed power spectral analysis of heart rate variability from 24-hour holter recording to identify cerebral hemispheric lateralization and gender effect in cardiac autonomic control. Methods Data were obtained from 24-hour holter recordings in 30 consecutive patients with hemispheric brain infarction in the subacute phase. We analysed the time domain and frequency domain measures of HRV and ST segment by hemispheric lateralization and Gender. Results ST segment was depressed in women compared with man. There was no statistically significant differences between right and left hemisphere stroke patients in any standard index of HRV and ST segment changes. Conclusions These data are partial consistent with evidence from the recent literature that two cerebral hemispheres and gender have a differential influence on the nature and severity of cardiac dysfunction. We think the prospective and definite study was necessary.

• 한국의류학회지
• /
• 제16권4호
• /
• pp.471-484
• /
• 1992

The purpose of this study was 1) to find out Market segmentation possibilities according to consumer's store selection factors by analysis of Consumer's attitude and oriteria of apparel store selection, 2) to provide marketing strategies of segment marker for apparel stores Research problems were as follows. 1) To find out the important factors of consumer's store selection and to segment markets according to their factors. 2) To find out consumer characteristics (demographic variables, clothing life factors, cloth-ing purchase behaviors) according to segment markets. 3) To find out preference store types and preference factors according to segment markets. 4) To provide marketing mix strategy for retail apparel store sales. The subjects selected for the final analysis were 586 female college students, housewives, and workers living in Seoul. A questionnaire was developed in order to measure consumer's selection criteria of apparel store, consumer characteristics and preferred store types and preferential factors. The results of this study were as follows: 1. There were 8 factors of consumer's store selection such that: the high quality, convenience, store atmosphere, economy, dependency commercials, store patronage, the conformity, product assortment. the result of cluster analysis based on these 8 factors of store selection verified that market was able to be segmented as four different market, which were the store loyalty group, the aligned economical group, the assortment pursuing group, the store fame dependent group. 2. There were significant differences among four groups, for 4 variables related to consumer's characteristics such as demographic characteristics (sex, age, job, level of education, the living quarters, marrige or unmarrige), clothing life factors, clothing evaluating criteria, and favorite fashion information sources. 3. There were significant differences among four groups for 2 variable related to store preference such as preference types of store and preference factors of store.

• 한국의류학회지
• /
• 제16권2호
• /
• pp.263-275
• /
• 1992

This study intends to provide strategic positioning of brand image analysed from the view point of perceptual dimensions of clothing consumers. Consumers are segmented on the basis of the attributes of brand image, and in each segment, perceptual map is composed according to multidimensional scaling. The results are as follows; 1. According to the Benefit Segmentation, it is statistically significant that the consumers are divided into 'product-factor oriented group 'and' image-factor oriented group'. 2. From the analysis of perceptual map upon the 'similarity of brand image,'image-factor oriented group 'perceives more differently than 'product-factor oriented group' 3. From the analysis of perceptual map with the evaluation of attributes of brand image, price, promotion and design are significant determinants in 'total consumer group'. In addition, store image is significant determinant in' image-factor oriented group' and quality is significant determinant in' product-factor oriented group'. According to the evaluation of consumers on 8 brands with determining attribute-vector, ranks of brands in each segment are similar in the vector of price and promotion but different in the vector of design between segment groups. 4. From the analysis of perceptual map upon the preference of brand image, the distribution of preference and position of ideal point are different between segment groups. 5. With evaluation of purchase habit, statistically significant differences are found between groups segmented in the degree of importance of attributes, purchasing motive, purchasing time, sources of information and expenses for clothes.

• Asian Spine Journal
• /
• 제12권6호
• /
• pp.1092-1099
• /
• 2018

Study Design: In-vitro biomechanical investigation. Purpose: To evaluate the biomechanical effects of the degeneration of the biodegradable cervical plates developed for anterior cervical discectomy and fusion (ACDF) on fusion and adjacent levels. Overview of Literature: Biodegradable implants have been recently introduced for cervical spine surgery. However, their effectiveness and safety remains unclear. Methods: A linear three-dimensional finite element (FE) model of the lower cervical spine, comprising the C4-C6 vertebrae was developed using computed tomography images of a 46-year-old woman. The model was validated by comparison with previous reports. Four models of ACDF were analyzed and compared: (1) a titanium plate and bone block (Tita), (2) strong biodegradable plate and bone block (PLA-4G) that represents the early state of the biodegradable plate with full strength, (3) weak biodegradable plate and bone block (PLA-1G) that represents the late state of the biodegradable plate with decreased strength, and (4) stand-alone bone block (Bloc). FE analysis was performed to investigate the relative motion and intervertebral disc stress at the surgical (C5-C6 segment) and adjacent (C4-C5 segment) levels. Results: The Tita and PLA-4G models were superior to the other models in terms of higher segment stiffness, smaller relative motion, and lower bone stress at the surgical level. However, the maximal von Mises stress at the intervertebral disc at the adjacent level was significantly higher in the Tita and PLA-4G models than in the other models. The relative motion at the adjacent level was significantly lower in the PLA-1G and Bloc models than in the other models. Conclusions: The use of biodegradable plates will enhance spinal fusion in the initial stronger period and prevent adjacent segment degeneration in the later, weaker period.

• 한국운동역학회지
• /
• 제18권2호
• /
• pp.95-104
• /
• 2008

본 연구는 남자 중학교 초보피험자들을 대상으로 태권도 돌려차기 동작의 숙련정도에 따른 운동학적 협응과 제어과정을 살펴보는 데 목적을 두었다. 이용된 변인은 최대합성직선속도와 각도 대 각도 도면이었다. 분석결과, 연습후기로 갈수록 인접한 분절간의 운동량 전이가 잘 이루어져 각 분절의 최대합성직선속도가 증가하였으며 무릎관절 최대굴곡 시까지는 엉덩관절과 무릎관절이 동형동조 협응형태로 변해갔으며, 최대굴곡 후 타격 시까지는 모든 숙련 단계에 있어서 이형동조 협응패턴을 나타내었다. 발목관절은 무릎관절 최대굴곡 시까지 배측굴곡 상태에서 저측굴곡으로 변했으며, 최대굴곡 후 타격시점까지는 발목관절은 고정시키고, 무릎관절은 신전시키는 자유도 고정 제어기전을 나타내었다.

• 한국콘텐츠학회논문지
• /
• 제12권12호
• /
• pp.779-786
• /
• 2012

본 연구는 승마 산업의 활성화를 위해 라이프스타일을 이용한 시장세분화전략을 제시하고자 수행되었다. 자료는 유의표집법에 의한 설문조사를 통해 수집되었고 총 397 명의 유효표본이 분석에 이용되었다. 라이프스타일의 요인분석 결과 세 개의 요인으로 분류되었고, 요인점수를 이용하여 군집분석을 실시하였다. 군집분석결과 총 두 개의 세분시장이 도출되었다. 첫 번째 시장은 '스포츠활동추구형'으로 스포츠활동을 선호하고 중요하게 생각하며, 총 397명 중 175명이 이 집단에 포함되었다. 남 녀가 골고루 분포되어 있고 20대와 30대가 주를 이루고 있으며 특히 미혼자가 많은 분포를 보이고 있다. 또한 10만원 이상 30만원 미만의 월평균 여가지출을 나타내고 있는 집단이기도 하다. 이들은 승마에 대해 상대적으로 더 호감을 가지고 있는 것으로 나타났으나 승마에 대한 관심이나 승마 참여의도는 타 시장에 비해 차이가 있다고 보기 어려우며, 그 수준도 낮은 것으로 나타났다. 두 번째 세분시장은 '소극적활동추구형'으로 여가시간에 주로 혼자 지내는 것을 선호하는 집단이다. 397명 중 222명이 이에 해당하는 것으로 나타났으며, 20대에서 40대의 연령에 30만원 미만의 월평균 여가지출을 하고 있는 세분시장이다. 이들은 '스포츠활동추구형'에 비해 승마에 대한 호감도가 낮은 것으로 나타났다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 하계학술대회 논문집 B
• /
• pp.920-922
• /
• 2002

This paper investigates the cogging torque reduction in a brushless DC(BLDC) motor having an inner-rotor with surface-mounted segment-type permanent magnets. The kind of magnets for the BLDC motor could have different waveforms of magnetization such as square, trapezoidal and sinusoidal form. This paper discusses the effect of the unsymmetrical magnetization distribution in the segment-type permanent magnet, which is able to obtain through a segment structure that the number of poles per segments is 2 ($N_p/N_s$), on the cogging torque and EMF waveform. Where the existing magnetizer fixture for the square-type magnetization is used to magnetize the magnets in two segment structures of $N_p/N_s$ = 1 and 2. The effectiveness of the proposed designs had been confirmed by comparing cogging torque, and EMF waveform between conventional and new models which are analyzed by Finite Element Method (FEM).

• 전기학회논문지
• /
• 제63권8호
• /
• pp.1128-1133
• /
• 2014

Most of the statistical signal analysis processed in the time domain and the frequency domain are based on the assumption that the signal is weakly stationary(wide sense stationary). Therefore, it is necessary to know whether the surface EMG signals processed in the statistical basis satisfy the condition of the weak stationarity. The purpose of this study is to find optimal segment length of surface EMG signal for assessing stationarity with the modified Run-test and RA-test. Ten stationary surface EMG signals were simulated by AR(autoregressive) modeling, and ten real surface EMG signals were recorded from biceps brachii muscle and then modified to have non-stationary structures. In condition of varying segment length from 20ms to 100ms, stationarity of the signals was tested by using six different methods of modified Run-test and RA-test. The results indicate that the optimal segment length for the surface EMG is 30ms~35ms, and the best way for assessing surface EMG signal stationarity is the modified Run-test (Run2) method using this optimal length.