• 한국지능시스템학회논문지
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• 제20권1호
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• pp.153-158
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• 2010

본 논문에서는 선행 연구를 통해 제안하였던 새로운 분류 알고리즘인 Variance Considered Machines (VCM)을 통해 EEG 신호의 분류 에러율을 감소시킴으로 Brain-Computer Interface (BCI)의 성능향상 가능성을 보였다. BCI란 뇌파를 통해 컴퓨터와 같은 시스템을 제어하는 것으로 BCI의 인식률에 영향을 미치는 것에는 많은 요소가 있지만 본 논문에서는 그 중에서도 가장 중요한 분류 알고리즘을 제안된 알고리즘을 통해 인식률을 향상하는 것을 보였다. 이를 위해 피험자가 가상으로 왼쪽 손과 다리를 움직이는 상상을 한 데이터를 기존에 가장 많이 사용되고 있는 분류 알고리즘인 SVM과 제안된 VCM으로 분류하여 인식률을 비교하였다. 기존 연구를 통해 VCM의 우수성을 이론적 결과와 시뮬레이션 결과로 보였다면 본 논문에서는 실제 데이터를 통한 실험을 통해 인식률 향상을 보였다.

• 한국농공학회논문집
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• 제59권5호
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• pp.25-30
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• 2017

Hydrologic soil group is one of the important factors to determine runoff potential and curve number. This study was conducted to classify the hydrologic soil groups of Korean soils by considering saturated hydraulic conductivity and depth of impermeable layer. Saturated hydraulic conductivity of Korean soils was estimated by pedotransfer functions developed in the previous studies. Most of paddy soils were classified as D type due to shallow impermeable layer and low saturated hydraulic conductivity in B soil horizon. For upland and forest, soils classified to A and D types increased compared with former classification method because underestimated permeabilities and overestimated drainages were corrected and rock horizon in shallow depth was regarded as impermeable layer. Soils in mountainous land showed the highest distribution in A type, followed by D type. More than 60 % of soils in mountain foot-slope, fan and valley, alluvial plains, and fluvio-marine deposits were classified to D type because of land use such as paddy and upland.

• 한국컴퓨터정보학회논문지
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• 제26권4호
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• pp.21-28
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• 2021

본 연구는 기존 편평발 측정을 위해 사용되던 다양한 방법의 한계를 보완할 수 있는 새로운 측정 방법으로 전이학습을 적용한 딥러닝 기반 편평발 분류 방법론을 제안한다. 편평발 88장, 정상발 88장으로 이루어진 총 176장의 이미지 데이터를 활용하여, 적은 데이터로도 우수한 예측 모델을 생성할 수 있는 데이터 증폭 기술과 사전학습 모델인 VGG16 구조를 활용하는 전이학습 기술을 적용하여 제안 모델의 학습을 진행하였다. 제안 모델의 우수성을 확인하기 위하여 기본 CNN 기반 모델과 제안 방법론의 예측 정확도를 비교하는 실험을 수행하였다. 기본 CNN 모델의 경우 훈련 정확도는 77.27%, 검증 정확도는 61.36%, 그리고 시험 정확도는 59.09%로 나타났으며, 제안 모델의 경우 훈련 정확도는 94.32%, 검증 정확도는 86.36%, 그리고 시험 정확도는 84.09%로 나타나 기본 CNN 모델에 비해 제안 모델의 정확도가 큰 폭으로 향상된 것을 확인하였다.

• Journal of Animal Science and Technology
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• 제51권2호
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• pp.97-104
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• 2009

교류와 경쟁력 향상을 위해서는 검정기준, 평가방법과 모델 등에 많은 보완이 필요하다. 따라서, 본 연구는 현재 국내의 50단계의 심사점수를 낙농선진국에서 채택하고 있는 9점제로의 변환을 통해 국제기준을 국내 현실에 맞게 적용하기 위해 실시했다. 분석에는 한국 종축개량협회(KAIA)의 젖소에 대한 혈통기록 및 2001에서 2006년도 사이에 실시된 체형 측정 기록 중 최종점수와 15개 체형형질에 대해 초산차의 기록을 갖는 32,487두의 암소집단의 선형심사기록 자료가 이용되었다. 9점제로 변경한 집단이 더욱 정규성을 띄는 분포 특성을 나타내었다. 상관분석결과에서도 모든 형질에서 50점제와 9점제 심사 점수간에 0.98 이상의 상관계수를 나타내었다. 따라서, 50 점제에서 9점제로의 변경이 가능할 것으로 판단된다. 하지만, 9점제로의 변환 후 모든 형질에서 심사자에 따라 고도의 유의성을 보였고(P<0.001), 점수제간 F값은 발굽기울기와 앞유방의 붙음성은 심사자간 변이가 비교적 높게 나타났다. 이것은 9점제로의 변환 후에도 심사자의 주관적인 요소가 점수에 영향을 미치는 것을 의미한다. 따라서, 선형형질 점수제 변환은 환경효과에 대한 다양한 분석을 통하여 적합성 여부를 결정해야 할 것이다.

• 농촌의학ㆍ지역보건
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• 제21권2호
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• pp.173-193
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• 1996

This study was carried out to elucidate the causes of farmer's disease and greenhouse disease in the rural area of Kyungnam province during 1996. 2,171 (69.1%) of the 3,140 adults above 20 years old who had lived in the selected 20 villages in Uiryong County of Kyungnam Province were selected in order to over both residents who live in the green house distracts and conventional rural area. The results were as follows: 1. Among the subjects, the male was 42.2% and female was 57.6%. The average age for the male was 52.3, 55.6 for the female. 2. The proportion of the farmers in the subjects was 81.5%. Among these 78.0% were engaged in the greenhouse farming. 3. Among the eight symptoms of Nofusho(japanese farmer's comples), lumbago was the most frequently complained and followed by shoulder stiffness and parenthesis of hand or foot. 4. The total score of farmer's disease was evidently higher in the female and the older the score was clearly bigger. 5. The prevalence of Nofusho(Japanese farmer's comples)was 26.8% and 43.15% was for the suspected Nofusho. In the male, the prevalence of Nofusho was 13.6% and 40.9% for the suspected Nofusho and in the female 36.5% and 44.7% were shown, comparatively. 6. According to the multiple classification analysis, sex, age, and occupation were selected as significant variables to explain the total score of Nofusho. 7. The correlations between the total score of Nofusho and the number of sick day, working years, and age were significant, comparatively. 8. According to the multiple classification analysis corolling interaction between independent variables, age was the only variable which was significant in the male and age, pesticide work in the female. 9. The score of greenhouse disease was highest in the group who engaged in greenhouse farming and conventional farming(2.76 for male, 3.77 for female) followed by the group who engaged only in greening house farming(2.66 for male, 3.49 for female) and by the group who engaged only in conventional farming(2.27 for male, 3.05 for female) 10. According to the multiple classification analysis with the total score of greenhouse disease as dependent variable, corolling interaction between independent variables, age and pesticide work were revealed as significant variables in the male, while, pesticide work and farming type were significant in the female. According to the above results, the following could be suggested. Because lumbago, shoulder stiffness, paresthesia of hand and foot were the most frequently complained symptoms in the respondent, the development of farming tool to reduce the body burden and periodical physical exercise and rest is highly recommended. It is revealed that both in the farmer' disease and greenhouse disease the score was higher in the female than in the male. So the reasonables measures is recommended to reduce the working hours of the female. Pesticide work was revealed as the significant variable in the female in farmer's disease and both in the male and the female in greenhouse disease. So the development of the safe method of pesticide spraying including safety education should be introduced. Particularly the female should be excluded in pesticide spraying.

• 동서간호학연구지
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• 제15권1호
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• pp.43-53
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• 2009

Purpose: This study is to summarize of Western-Eastern books and articles on sleep disturbances and to analyze the trends of nursing research in Korea. Methods: The Western-Eastern books and articles on sleep disturbances were comprehensively reviewed. The 70 articles published from 1981-2008 of Korean nursing research about sleep disturbances were reviewed using a structured form. Results: In Oriental medicine, the main cause of sleep disorder is unbalance of Yin and Yang, the treatments are herb therapy, acupuncture, moxibustion, psychotherapy, sleep hygiene, etc. In Western medicine, the International Classification of Sleep disorder is dyssomnia, parasomnia, mental/neurologic or other medical disorders, proposed sleep disorder and the treatments are pharmacotherapy, cure treatment of sleep hygiene, cause, behavior and perception. The number of nursing research and experimental study about sleep disorder in Korea is increasing. The most common subjects were hospitalized patients and the elderly, Of the 34 experimental studies, foot reflexology was the most commonly used as a nursing intervention. Conclusions: Nurses should concern more on patients' or clients' sleep disturbances to increase their quality of life. This literature study is useful for the access to effective nursing intervention for sleep disturbances.

• International journal of advanced smart convergence
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• 제13권1호
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• pp.37-47
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• 2024

This study presents the results of designing a system that determines the location of a person in an indoor environment based on a single IMU sensor attached to the tip of a person's shoe in an area where GPS signals are inaccessible. By adjusting for human footfall, it is possible to accurately determine human location and trajectory by correcting errors originating from the Inertial Measurement Unit (IMU) combined with advanced machine learning algorithms. Although there are various techniques to identify stepping, our study successfully recognized stepping with 98.7% accuracy using an artificial intelligence model known as Long Short-Term Memory (LSTM). Drawing upon the enhancements in our methodology, this article demonstrates a novel technique for generating a 200-meter trajectory, achieving a level of precision marked by a 2.1% error margin. Indoor pedestrian navigation systems, relying on inertial measurement units attached to the feet, have shown encouraging outcomes.

• 대한족부족관절학회지
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• 제12권1호
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• pp.26-30
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• 2008

Purpose: The authors evaluated the differences between K-wires and Bold screw for fixing the proximal metatarsal chevron osteotomy of moderate and severe hallux valgus. Materials and Methods: There were 59 patients (81 feet) who were moderate and severe degree hallux valgus according to the classification of Mann. They all got the proximal chevron osteotomy when correcting the deformity. All patients were followed up at least 6 months. We divided the patients into 2 groups, K-wires fixed group as A, Bold screw fixed group as B. Group A were 42 patients (63 feet) and Group B were 18 patients (19 feet). Among the Group B, 2 feet who were failed to fix the oetotomy site with Bold screw, were fixed with K-wires during operation. We measured the AOFAS score preoperatively, postoperatively and at final follow-up, VAS score at 2 weeks after the operation. Also preoperative, postoperative and follow-up hallux valgus angle (HVA) and intermetatarsal angle (IMA) were measured for each patients. Results: Mean follow up period was 1.34 year (range: 6 months-6.16 years). Mean VAS score of group A was $3.21{\pm}1.7$ and group B $1.76{\pm}1.0$. Preoperative mean AOFAS score of group A was $45.61{\pm}8.3$, group B $44.41{\pm}8.9$, the final mean score of group A was $88.87{\pm}8.3$ and group B $92.47{\pm}4.4$. Preoperative mean HVA was $30.82{\pm}6.6$ degrees in group A and $32.88{\pm}14.5$ degrees in group B, the final mean angle of group A was $14.89{\pm}8.3$ degrees and group B $17{\pm}4.4$ degrees. The preoperative mean IMA of group A was $13.69{\pm}3.6 $degrees and group B $12.35{\pm}5.2$, the final mean angle of group A was $9.26{\pm}3.6$ degrees and group B $12.35{\pm}5.8$ degrees. Conclusion: There were no statistical differences in radiologic and clinical results (p>0.05) but, group B exceeded group A in VAS score (p=0.0007) and had no statistical significance in terms of reduction angle loss (p=0.06). Early returning to normal life activity may be possible for patients using Bold screws.

• 대한족부족관절학회지
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• 제17권2호
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• pp.130-135
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• 2013

Purpose: Preshaped Locking compression plate(LCP) has holes with fixed angle between screw and plate and have advantage firm fixation because it has stability of angular and axial deformity. We evaluated usefulness of LCP after open reduction and internal fixation in distal fibular fracture. Materials and Methods: Between December 2011 and May 2012, 23 patients with fracture of distal fibula were followed up at least 12 months underwent open reduction and internal fixation with LCP. There were 15 males and 8 females with a mean age 39.8(20~69) years. According to Danis-Weber classification, there were 20 cases of type B and 3 cases of type C. There were 13 cases of isolated lateral malleolus fractures, 1 case of bimalleolar fracture, 6 cases of trimalleolar fractures and 3 cases of distal tibia fractures with proximal fibula fracture. Intraoperatively, we assessed whether preshaped LCP fit lateral margin of distal fibula or not and evaluated quality of reduction and postoperative complications. The cases were analyzed by radiological bone union time and clinical results according to the criteria of Meyer Results: Of all cases, complete bone union was achieved and average radiological bone union time was 7.3(6~12) weeks. The clinical results were excellent in 18 cases(78%), good in 5 cases(22%). There were 5 cases of plate with 3 holes, 13 cases of plate with 4 holes, 2 cases of plate with 5 holes, 1 case of plate with 6 holes and 2 cases of plate with 7 holes. The average number of screws at proximal fragement was 2.5 and at distal fragment was 3.5. In 14 cases (60.8 %), we needed re-bending of plate because the distance between plate and lateral cortical margin of distal fibula was more than 5 mm at anteroposterior X-ray after reduction. All cases have anatomical reduction and there were no complications of wound infections. There were no complaint about hardware irritation. Conclusion: At fractures of distal fibula,preshaped LCP had a excellent stability although far cortex was not fixed with screw and bending of plate. And there are less complications of hardware irritation and wound problems. But, Some complement would be needed because there were no complete fitting between precontour of LCP and lateral cortical margin of distal fibula.

• 구강회복응용과학지
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• 제19권2호
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• pp.57-67
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• 2003

Suppose that dental occlusion is related to body posture. We want to find out that improving occlusal balance may affect vibration and distribution of C.O.P. in which way, by measuring change of posture and center of gravity (center of pressure, C.O.P.) which plays important role in measuring balance sensation. Total 11 students at Kyung Hee dental college students, 4 females and 9 males (age: 23-30) participated in this test, who have normal occlusion (Angle's classification I), no TMJ problems. All of the participants have no tooth loss except 3rd molar, no prosthesis over single tooth restoration, no orthopedic problems which affect balance sensation, and no otorhinolaryngological problems. First, we registrated bite by centric relation, and then fabricated stabilization splint that is increased 3.5mm vertical dimension around premolar region. By F-scan (Tekscan Inc., Boston, Mass), we measured discrepancy of average contact pressure of left and right foot. And we also measured discrepancy of vibration of C.O.P(center of pressure). before setting stabilization splint and after wearing stabilization splint at intervals of 1 week, 2 weeks, 3 weeks after. In normal human beings, improved occlusal balance by stabilization splint leads to decrease of vibration of C.O.P. (P<0.05). One week after wearing stabilization splint, vibration of C.O.P. decreased reliably (P<0.05), two weeks after wearing stabilization splint, vibration of C.O.P. decreased similarly comparing to before wearing and one week after wearing. (P<0.05) After two weeks and three weeks, however, it was hard to find reliability. (P>0.05) Difference between average contact pressure of right and left foot also decreased. (P<0.05) We could find decrease after one week of wearing stabilization splint (P<0.05) and two weeks after, the decrease was more reliable than one week after. (P<0.05) After two weeks and three weeks, however, it was hard to find reliability. Improvement of occlusal balance leads to decrease of vibration of C.O.P. and decrease of difference between right and left average contact pressure.