• 전자공학회논문지
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• 제51권2호
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• pp.148-155
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• 2014

본 논문에서는 파형 신호에서 패치를 추출하고 이를 패치 그래프로 구성한 다음, 이로부터 대표적인 다양체 임베딩 방식인 컴뮤트 타임 임베딩 기법을 구현하고, 이의 특성을 분석한다. 특히 음성 신호나 악기 음 등, 시간에 따라 스펙트럼이 가변적인 신호를 임베딩하면 스펙트럼의 변화에도 불구하고 그 신호 고유의 기하 구조를 생섬함을 실험으로 확인한다. 다양체 임베딩은 비선형 공간에 놓여 있는 고차원 데이터를 저차원 공간으로의 효율적인 맵을 가능하게 하지만 그래프 구성에 이용된 데이터에 대한 정보만 알 수 있고 그렇지 않은 데이터(out-of-sample data)에 대해서는 정보를 얻기 어렵다. 따라서 다양체 임베딩은 데이터 클러스터링에 적절히 적용 가능하지만, 훈련 과정을 통해 얻은 정보를 기초로 유추 기능이 요구되는 인식 등에는 응용하기 어려운 제약이 따른다. 이를 해결하기 위하여 본 논문에서는 다양체 임베딩이 인식 분야에도 적용 가능하도록 새로운 알고리즘을 제안하고 악기 음 분류 실험을 통하여 그 특성을 분석한다.

• 전기학회논문지
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• 제66권7호
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• pp.1083-1091
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• 2017

As big data technologies have been developed and massive data have exploded from users through various channels, CEO of global IT enterprise mentioned core importance of data in next generation business. Therefore various machine learning technologies have been necessary to apply data driven services but especially recommendation has been core technique in viewpoint of directly providing summarized information or exact choice of items to users in information flooding environment. Recently evolved recommendation techniques have been proposed by many researchers and most of service companies with big data tried to apply refined recommendation method on their online business. For example, Amazon used item to item collaborative filtering method on its sales distribution platform. In this paper, we develop a commercial web service for suggesting music contents and implement three representative collaborative filtering methods on the service. We also produce recommendation lists with three methods based on real world sample data and evaluate the usefulness of them by comparison among the produced result. This study is meaningful in terms of suggesting the right direction and practicality when companies and developers want to develop web services by applying big data based recommendation techniques in practical environment.

• 한국엔터테인먼트산업학회논문지
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• 제14권5호
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• pp.27-35
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• 2020

2020년 들어 전대미문의 '코로나-19' 사태로 대중음악계가 위축되어 다양한 활로와 대안이 모색되는 가운데 뮤지션들이 비접촉 방식의 온라인 콘서트를 속속 실시하였다. 본 연구는 이런 점에 착안하여 2020년 6월에 실시된 방탄소년단(BTS)의 '방방콘 The Live'를 대상으로 비접촉 콘서트의 대안 포맷으로 적격한지에 대한 여부를 살펴보기 위해 음악전문가들이 참여한 온라인 콘서트 영상물의 내용분석과 이를 시청한 수용자들이 참여한 평가 수집 및 대안 제시형 설문조사를 실시하였다. 연구 결과 표본 공연 영상물은 오프라인 콘서트의 요소(현장성, 대면 교감성, 호응 행동성), 체감도, 비상시 대안 콘서트 포맷으로서의 만족도, 비상시 대안 콘서트 포맷으로서 편리성이 잘 반영된 것으로 나타났다. 그러나 팬들과의 교감성과 현장성의 반영은 매우 부족한 것으로 분석되었다. 따라서 이 연구는 BTS의 '방방콘 The Live'가 비상시 비접촉 온라인 콘서트의 대안 포맷으로 기능할만한 가능성은 엿보였으나 국내는 물론 세계 음악계에 정착하는 수준으로 인정받기 위해서는 디지털 소통체계 및 기술장치 보완 등의 조치가 강구되어야 함을 암시한다.

• 대한간호학회지
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• 제46권4호
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• pp.475-489
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• 2016

Purpose: This study was a systematic review and meta-analysis designed to investigate the effects of stimulation-oriented interventions for behavioral problems among people with dementia. Methods: Based on the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA), a literature search was conducted using seven electronic databases, gray literature, and other sources. Methodological quality was assessed using the Scottish Intercollegiate Guidelines Network (SIGN) for randomized controlled trials (RCTs). Data were analyzed using R with the 'meta' package and the Comprehensive Meta-Analysis (CMA 2.0) program. Results: Sixteen studies were included for meta-analysis to investigate the effect of stimulation-oriented interventions. The quality of individual studies was rated as '++' for eight studies and '+' for the rest. The effect sizes were analyzed according to three subgroups of interventions (light, music, and others); Hedges' g=0.04 (95% CI: -0.38~0.46), -0.23 (95% CI: -0.56~0.10), -0.34 (95% CI: -0.34~0.00), respectively. To explore the possible causes of heterogeneity ($I^2=62.8%$), meta-regression was conducted with covariates of sample size, number of sessions, and length of session (time). No moderating effects were found for sample size or number of sessions, but session time showed a significant effect (Z=1.96, 95% CI: 0.00~0.01). Finally, a funnel plot along with Egger's regression test was performed to check for publication bias, but no significant bias was detected. Conclusion: Based on these findings, stimulation-oriented interventions seem to have a small effect for behavioral problems among people with dementia. Further research is needed to identify optimum time of the interventions for behavioral problems among dementia pateints.

• 지역사회간호학회지
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• 제19권2호
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• pp.300-309
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• 2008

Purpose: The purpose of this study was to review research trends and show the developmental direction of studies on dementia and nursing interventions for demented elders. Methods: This study analyzed 104 articles on dementia and 23 on nursing interventions for demented elders published until 2007. Results: These dementia studies increased in quantity after 1996, mainly in studies on demented elders and their families and in quantitative studies, Nursing intervention methods were music, light, horticultural therapy, reminiscence and complex therapeutic program, etc. There were experimental studies after 1996, but non-equivalent control group pretest-posttest design was 8(34.8%) of 23(100,0%). The medium sample size was 16.6 for experimental groups, 13 for control groups. The experimental time range was 10-120 minutes a day, frequency was 1-18 a week, and the total frequency was 4-72. The result variables were cognitive function, dementia behavior, emotion, depression, ADL, social behavior, etc. Conclusion: The findings of this review suggest that studies on dementia have been improved in quantity since 1996, but various and effective research methods should be developed as a way to further improve the quality of studies.

• 한국의류학회지
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• 제32권2호
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• pp.223-234
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• 2008

This Study is designed to identify the appropriate fields of culture and art supporting activities in fashion business and to propose an effective culture and art strategy on establishment of positive fashion brand attitude. Subjects of this study were 242 young male and female consumers interested in fashion and culture marketing activities. Data were analyzed by using SPSS 12.0 with Independent-Sample T-Test, ANOVA, Duncan test. Also, we suggested the FBFit(Fashion Brand-Mecenat Fit) model by using Prefmap3. The results are as follows: First, it was revealed that culture art marketing activities such as a film, a popular music, a musical of the art and culture fields were important for maintaining the positive fashion brand image. Second, the consumer with recognition of culture and art supporting activities had a positive attitude on culture and art marketing of fashion brand. Third, FBFit model was revealed that there was a significant difference an appropriate culture and art fields for each fashion brand image. Therefore, each fashion brand has to select appropriate fields of culture and art marketing activities by considering their fashion brand image with a long term perspective.

• 지능정보연구
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• 제17권2호
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• pp.97-107
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• 2011

본 논문에서는 2차원 바코드를 이용한 오디오 워터마킹 알고리즘을 제안하였다. 삽입되는 워터마크 정보로는 2차원 바코드인 QR 코드를 변형하여 이용하였다. 2차원 바코드가 1차원 바코드에 비하여 많은 정보를 표현할 수 있고, 코드자체가 에러 보정능력을 내재하고 있는 장점을 이용하여 워터마킹 알고리즘의 견고성을 높였다. 또한 부분적인 워터마크 정보의 손실에 대응하기 위하여 직교코드를 이용하여 삽입대역을 확산했으며, 삽입강도 0.7에서 50dB 이상의 우수한 품질을 확보할 수 있었다.

• 대한후두음성언어의학회지
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• 제15권2호
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• pp.122-127
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• 2004

Background and Objectives : Many studies have described and analyzed singer's formant and it has been shown that the epilaryngeal tube in the human airway is responsible for vocal ring, or the singer's formant. A similar phenomenon produced by trained singers in their speech led some authors to examine the speaker's ring. This study was designed to analyze the speaking voice of the singers and speaker's ring. Baterials and Methods : Ten tenors, fifteen baritones, fifteen sopranos and ten mezzo sopranos attending the music college, department of vocal music were chosen for this study. Fifteen male and fifteen female untrained normal speakers were chosen for control group. Each subject was asked to produce a sample of a sustained spoken vowel /ah/ sound for at least five seconds and read sentence 'Kaeul'. The sound data was analyzed using the Fast Fourier Transform(FFT) - based power spectrum, Long term average(LTA) power spectrum using the FFT algorithm of the Computerized Speech Lab(CSL, Kay elemetrics, Model 4300B, USA). Statistical analysis was performed using the Mann-Whitney test of the Statistical Package for Social Sciences(SPSS). Results : For LTA Power spectrum of/ah/ sound, a significant increase was seen in the 2,500-3,500Hz region(p<0.01) in four trained singer group compared with untrained speaker group, and a significant increase in the 9,000-10,000Hz region(p<0.01) in soparano group. Similarly, in sentence 'Kaeul', there was a significant increase in energy in the tenor, baritone, mezzo soprano group compared with the untrained speaker group in the 2,500-3,500Hz region(p<0.01), and a significant increase in all frequency region(p<0.01) in the soprano group. Conclusions : The LTA power spectrum suggests that trained singers group show more energy concentration in the 'singer's formant' region in the speaking voice, and authors believe this region to be the 'speaker's ring'. Further research is needed on the effect of singing training on the resonance of the speaking voice.

• 부모자녀건강학회지
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• 제7권2호
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• pp.144-159
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• 2004

Purpose: The purpose of this study is to explore mother's perception and practice of Taegyo. In addition, belief factors toward Taegyo oriented Korean mother-fetus interaction are identified in order to obtain baseline data for the development of Taegyo oriented program enhancing mother-fetus interaction. Method: The sample consisted to 186 pregnant women who visited public health center or hospital for prenatal care. Self-reporting questionnaire devised by investigator was used. Data were analyzed by SPSS win program and contents analysis was used. Result: Although mothers intended to a pregnancy, many of them were perceived negatively toward pregnancy. The study revealed that most of pregnant women continued cultural practices related to Taegyo, they focused on mother-fetus interaction behavior-such as listen to the music, reading a book, talk to fetus, stroke the fetus- with being altered traditional beliefs toward Taegyo or Taemong. Most of pregnant women had Taemong and believed a it's predictive functions. Beliefs toward mother-fetus interaction were classified to 6 factors, pregnancy, Taemong. fetus, practice behavior, infant's abilities and mother-fetus interaction behavior. The scores of belief toward mother-fetus interaction and each factors of pregnancy, fetus, practice behavior, infant's ability were statistically significant different depending upon husbands education. Also pregnancy factor in belief toward mother-fetus interaction was statistically significant different depending upon the number of children, child birth, experience of abortion, premature birth. Conclusion: Developing Taegyo oriented program enhancing the mother-fetus interaction need to include the elements of being facilitated maternal identity formation and maternal confidence for the pregnant women. In addition, it should be developed the program concerning with the characteristics of the pregnant women.

• 산경연구논집
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• 제9권2호
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• pp.73-80
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• 2018

Purpose - The purpose of this study is to clarify the difference of store attributes of Korean consumers and to analyze it's influence on consumer satisfaction in duty free stores which gain ground inch by inch in the distribution chanel. And it is to find discriminative result as compared with foreign consumer. Research design, data, and methodology - Subjects for the quantitative study, quota sampling was adopted in the Lotte, Shilla downtown and airport duty free stores from the first to 15^th December 2016 and 177 questionnaires from Koreans who had purchasing experience in off line duty free store were analyzed. The data was analyzed by using factor and reliability analysis, descriptive statistics analysis, the independent sample t-test and multiple regression analysis. To test consistency, Cronbach's alpha was used. Results - The result were as follows; 1. Korean consumers consider the importance of store attributes in duty free stores in order Product, Economic Feasibility, Convenience, Promotion, and Accessibility. 2. The meaningful impactive factors of duty free store attributes on consumer satisfaction turned out Product and Promotion. 3. These results show meaningful distinction between Koreans and foreigners in terms of consumer satisfaction in duty free stores. Conclusions - A marketer who is working for duty free store consider now that price benefit can not give strong impact to Korean consumers more and should concentrate on various brand assortment even including private brand. In terms of promotion, most duty free shops put special stress on foreign consumer's wants now as highly increasing of Chinese travelers but Korean consumer's sales portion and number of visitor also are steadily increasing. Therefore, a duty free marketer should prepare the Korean-oriented services with more enhanced promotion strategies for individual and group travellers, for example, a mileage service, VIP room and social network system to satisfy Korean consumers. In order to get satisfaction from Korean consumers, it makes effort on product and promotion than accessibility, price and convenience. Due to high level influence, further study is needed to enlarge to on-line market and to develop private brands for duty free stores.