• 정보과학회 컴퓨팅의 실제 논문지
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• 제21권10호
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• pp.631-638
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• 2015

최근 모바일 환경에서 작동 가능한 음성 인식 시스템에 대한 수요가 급격히 증대되고 있다. 본 논문은 음소 기반 한국어 음성 인식 시스템에 적용하기 위한 새로운 한국어 음소 경계 검출 방안을 제안한다. 먼저 입력 신호는 동일한 크기의 블록들을 구성한다. 제안하는 방식은 입력 음성 신호의 각 블록에 대해 계산되는 변동성 지표와, 부호가 동일한 인접 샘플들의 집합인, 블록 내의 각 벌크에 대해 계산되는 벌크 지표를 음소 경계 검출의 기반 지표로 사용한다. 두 가지 기반 지표를 결합하여 활용하는 세 개의 전용 인식 알고리즘을 사용하여, 모음, 유성 자음, 그리고 무성 자음을 차례로 인식하여 음소 간 경계를 검출한다. 실험 결과를 통해, 제안하는 방식을 사용함으로써 기존의 경계 검출 방식에 비해 오류율을 현저히 감소시킬 수 있음을 확인하였다.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제4권5호
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• pp.161-170
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• 2015

스마트 단말기가 확산되면서 사용자에게 최적의 서비스 또는 지능화된 서비스를 제공해주는 스마트 환경이 연구되고 있다. 스마트 환경에서 다수의 단말기들은 상호작용을 통해 사용자에게 최적의 서비스를 제공하고 생산성을 높이는 필요성이 요구된다. 즉, 스마트 환경은 단말기 간의 자원 활용을 극대화할 수 있고 작업의 효율을 증대할 수 있는 스마트 단말기 협업을 지원할 수 있어야 한다. 본 연구에서는 저사양 단말기의 재사용성을 높여 단말기 효율성 증대와 개인의 스마트 공간 구현에 도움이 되고자 데이터 콘텐츠 자원뿐만 아니라 단말기의 기능 및 소프트웨어 등과 같은 기능적 지원까지 가능한 새로운 단말기 협업 서비스 모델을 제안하였다. 이를 스마트 단말기 협업 서비스라고 정의하였으며, 전체적인 서비스 모델 구성을 설계하였다. 제안한 새로운 단말기 협업 서비스 모델을 증명하기 위하여 연락처 교환 및 카메라 기능 지원이 가능한 스마트 협업 애플리케이션을 개발하였다. 본 연구 결과는 새로운 단말기 협업 서비스 모델이 등장할 것을 기대하며, 이러한 서비스의 활용을 통해 사용자들은 자신의 사용하지 않았던 단말기까지 재사용할 수 있어 자원 낭비를 막고, 개인 스마트 공간 구성에 도움을 줄 것이라 예상한다.

• 한국운동역학회지
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• 제17권3호
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• pp.81-94
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• 2007

The purpose of this study was to critically review biomechanical studies on foot orthoses (FO) in normal and diseased foot and provide beneficial information obtained from researches until now and future researching focus. The search was performed by Medline and Embase database including studies published in English from January 1980 to April 2007. The searching terms were foot orthoses, foot orthotics, insoles and shoe insert. 57 studies including 54 journal articles and 3 abstracts were finally selected under the conditions of having clinical trials, FO, control condition, movement, scientific measuring system. The reviewed studies were divided into 10 categories according to subject characteristics; healthy normal, excessive pronation or flexible flat foot, rheumatoid arthritis, diabetes, medial knee osteoarthritis, forefoot varus, plantar fasciitis, patellofemoral syndrome, cavus foot and finite element model. In summary, first, soft and semirigid FOs with some degree of cushioning showed much higher comfort and efficacy than rigid FO. Second, no big differences between prefabricated and custom FO were shown. Third, the full length's FO was preferable to the half length's FO or simple arch supports. Fourth, the wearing of FO combining medial arch supports and metatarsal dome made positive roles to enhance comfort and functionality and redistribute plantar pressure under the foot. Fifth, for patients with knee-related diseases lateral wedges were preferable. Sixth, measuring systems were properly applied according to the types of foot diseases.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.754-758
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• 2005

Optimization of process variables such as arc current, welding voltage and welding speed in terms of the weld characteristics desired is the key step in achieving high quality and improving performance characteristics without increasing the cost. Consequently, incorrect settings of those process variables give rise to deviations in the welding characteristics from the desired bead geometry. Therefore, trainee welders are referred to the tabulated information relating different metal types and thickness as to recommend the desired values of process variables. Basically, the bead geometry plays an important role in determining the mechanical properties of the weld. So that it is very important to select the process variables for obtaining optimal bead geometry. However, it is difficult for the traditional identification methods to provide an accurate model because the optimized welding process is non-linear and time-dependent. In this paper, the possibilities of the Infra-red sensor in sensing and control of the bead geometry in the automated welding process are presented. Infra-red sensor is a well-known method to deal with the problems with a high degree of fuzziness so that the sensor is employed to build the relationship between process variables and the quality characteristic the proposed above respectively. Based on several neural networks, the mathematical models are derived from extensive experiments with different welding parameters and complex geometrical features. The developed system enables to select the optimal welding parameters and control the desired weld dimensions during arc welding process.

• 한국터널지하공간학회 논문집
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• 제3권3호
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• pp.31-43
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• 2001

본 연구에서는 안전진단에 관한 기본적 정보를 제공하고 유사한 변상의 발생을 최소화하기 위한 목적으로 터널의 변상사례들에 대한 조사와 분석을 수행하였다. 국내외 터널의 44개 변상사례에 대하여 4개 항목 즉, 내용수명, 변상유형 및 원인, 지질상태 등에 관한 빈도 수를 분석하였다. 이와 더불어 국내 터널분야의 전문가들로부터 안전진단 평가에 관련하여 총 28개 항목에 대한 설문조사를 수행하였다. 본 연구의 결과는 터널의 변상항목 중에는 균열에 의한 변상이 42~58% 정도로 가장 높은 비율을 나타났다. 변상 원인으로는 시공불량에 의한 영향이 높은 비율을 나타내고 있으므로 시공품질의 확보가 중요한 요인으로 사료된다. 설문조사 결과로부터 경직된 평가기준의 완화를 지적하였다. 그리고 각 항목별 중요도를 제시함으로써 인공지능기법 등을 안전진단분야에 적용하기 위한 기초자료로 활용될 수 있을 것이다.

• 대한한방부인과학회지
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• 제29권1호
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• pp.102-115
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• 2016

Objectives: The purpose of this study is to find out the characteristics of dysmenorrhea patients with the Inbody test results by Sasang constitutions. Methods: The data from the 541 participants were collected using a structured measurement of menstrual pain. Based on the survey responses, we had 329 women with dysmenorrhea as the test group and 212 women without dysmenorrhea as the control group. The clinical trials subjects were asked to respond to another questionnaire for identifying their constitutional types and undergo Inbody test. Results: The result of a comparison of the test and control groups showed that the DSOM test showed that the scores of blood deficiency, qi stagnation, blood stasis and phlegm were significantly higher in dysmenorrhea. The result of the taeumin's test groups showed that the DSOM test showed that the scores of heat were significantly higher. For the Sasang constitution, there is a difference on the cause of the outbreak. Taeumin from blood deficiency, blood stasis, dampness, heart, kidney, phlegm and lung is associated with dysmenorrhea. Soeumin from blood deficiency, qi stagnation, blood stasis, liver, heart, spleen and phlegm is associated with dysmenorrhea. The ratio of overweight of taeumin was low in blood deficiency and yin deficiency. The ratio of lowweight of soeumin was high in heat. Conclusions: The DSOM test showed that the scores of blood deficiency, qi stagnation, blood stasis and phlegm were significantly higher in dysmenorrhea.

• Journal of Microbiology and Biotechnology
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• 제29권3호
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• pp.429-440
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• 2019

Several studies have attempted to identify factors associated with longevity and maintenance of health in centenarians. In this study, we analyzed and compared the gut microbiota of centenarians in longevity villages with the elderly and adults in the same region and urbanized towns. Fecal samples were collected from centenarians, elderly, and young adults in longevity villages, and the gut microbiota sequences of elderly and young adults in urbanized towns of Korea were obtained from public databases. The relative abundance of Firmicutes was found to be considerably higher in subjects from longevity villages than those from urbanized towns, whereas Bacteroidetes was lower. Age-related rearrangement of gut microbiota was observed in centenarians, such as reduced proportions of Faecalibacterium and Prevotella, and increased proportion of Escherichia, along with higher abundances of Akkermansia, Clostridium, Collinsella, and uncultured Christensenellaceae. Gut microbiota of centenarians in rehabilitation hospitals were also different to those residing at home. These differences could be due to differences in diet patterns and living environments. In addition, phosphatidylinositol signaling system, glycosphingolipid biosynthesis, and various types of N-glycan biosynthesis were predicted to be higher in the gut microbiota of centenarians (corrected p < 0.05). These three metabolic pathways of gut microbiota can be associated with the immune status and healthy gut environment of centenarians. Although further studies are necessary to validate the function of microbiota between groups, this study provides valuable information on centenarians' gut microbiota.

• 농업과학연구
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• 제46권2호
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• pp.395-404
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• 2019

This paper investigated the changes in Hanwoo breeding farms and herds according to their farm size and farm types based on traceability data in the Hanwoo industry. The major results are summarized as follows. First, the notion that small sized farms are breeding farms and middle or large sized farms are fattening farms is wrong. The results show that middle or large farms are not only fattening cattle but also breeding female cattle. Based on cattle data for over 6 months and under the criteria of a female cow ratio of 10 and 90% using the 2/4 quarter of 2018, the results show that the ratio of fattening only farms is 5.7%, that of breeding only farms is 59.0%, and that of fattening and breeding farms is 36.1%. The ratios of fattening, breeding, and both are 13.3, 13.5, and 73.2%, respectively, for a farm size with over 100 cattle. Second, this study found that the ratio of breeding farms over total farms has been increasing continuously over the last 5 years. This trend is apparent in the middle or large sized farms. However, the birth rate of cows is relatively lower in the middle and large sized farms than in the small sized farms. Hence, we can infer that the demand for a detection system for standing estrus in female cattle will increase. Additionally, the government should prepare relevant policies to stabilize the managerial conditions of middle or large sized farms.

• 감성과학
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• 제23권4호
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• pp.73-92
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• 2020

본 논문은 시각장애인의 문화향유권 확대를 위하여 현재 비중 있게 다루어지지 않고 있는 감각인 후각을 사용한 새로운 미술작품 감상법 개발의 가능성에 대하여 다루고 있다. 인간의 후각은 현대사회에서는 크게 중요시되지 않는 감각이지만 이는 문화적인 요인에 의한 것이며, 생물학적인 관점에서 후각은 실용적 활용 가능성을 충분히 지닌 감각이다. 본 연구에서는 여러 종류의 향이 후각을 통하여 인지될 때 각각 고유의 색상 및 개념과 무의식적인 연관 관계를 지니고 있음을 가정하였고, 이를 향의 색 지향성과 개념 지향성이라는 용어로 나타내었다. 연구자들은 실험을 통하여 특정한 일부 향에 색 지향성과 개념 지향성이 존재함을 확인하였고 이러한 향을 활용하여 시각장애인들에게 미술작품에 사용된 색상에 대한 정보를 전달하는데 성공하였다. 본 연구를 기반으로 색채가 지닌 명도와 채도 및 더 다양한 색상을 전달할 수 있는 색-개념 지향성 향의 활용에 관한 연구를 지속할 수 있기를 희망한다.

• Animal Bioscience
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• 제34권1호
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• pp.134-142
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• 2021

Objective: To understand the athletic characteristics of Thoroughbreds, high-throughput analysis has been conducted using horse muscle tissue. However, an in vitro system has been lacking for studying and validating genes from in silico data. The aim of this study is to validate genes from differentially expressed genes (DEGs) of our previous RNA-sequencing data in vitro. Also, we investigated the effects of exercise-induced stress including heat, oxidative, hypoxic and cortisol stress on horse skeletal muscle derived cells with the top six upregulated genes of DEGs. Methods: Enriched pathway analysis was conducted using the Database for Annotation, Visualization, and Integrated Discovery (DAVID) tool with upregulated genes in horse skeletal muscle tissue after exercise. Among the candidates, the top six genes were analysed through geneMANIA to investigate gene networks. Muscle cells derived from neonatal horse skeletal tissue were maintained and subjected to exercise-related stressors. Transcriptional changes in the top six genes followed by stressors were investigated using quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Results: The inflammation response pathway was the most commonly upregulated pathway after horse exercise. Under non-cytotoxic conditions of exercise-related stressors, the transcriptional response of the top six genes was different among types of stress. Oxidative stress yielded the most similar expression pattern to DEGs. Conclusion: Our results indicate that transcriptional change after horse exercise in skeletal muscle tissue strongly relates to stress response. The qRT-PCR results showed that stressors contribute differently to the transcriptional regulation. These results would be valuable information to understand horse exercise in the stress aspect.