http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
홍동균,천미현,이동화 한국산업정보학회 2019 한국산업정보학회논문지 Vol.24 No.5
정보 기술의 발전에 따라 유비쿼터스 컴퓨팅 기술이 대두되고 있다. 이에 맞춰 디바이스의 소형화와 사용자의 편리성을 증대시키기 위한 여러 연구가 진행되고 있다. 그중 몇몇의 제안된 디바이스들은 사용자가 착용해야 한다는 점과 손에 들고 동작시켜야 한다는 불편함이 있다. 본 논문에서는 이러한 불편함을 해결하기 위해 텔레비전 시청 시 사용할 수 있는 가상 버튼을 제안하였다. 텔레비전을 통해 영상 시청 시 전방에서 사용자가 영상을 시청한다는 점을 이용해 카메라를 TV 상단에 설치하여 카메라가 머리 위쪽을 촬영하게 한다. 촬영된 영상에서 배경과 손 영역을 분리하여 검출하고, 검출된 손 영역에 외곽선을 검출한 후 손가락의 끝점을 검출한다. 손가락의 끝점을 검출하면 전방을 촬영하고 있는 영상 상단에 가상 버튼 인터페이스가 출력되며 검출된 손가락의 끝점이 포인터가 되어 위치정보를 갖고 버튼 안쪽에 위치할 경우 버튼이 동작한다.
홍동균,박혜경,김용진 한국물환경학회 2023 한국물환경학회지 Vol.39 No.1
This study analyzed the relationship between harmful cyanobacterial abundance and environmental factors in order to figure out the causes of the recent increase of cyanobacteria in Lake Dukdong from 2019 to 2021. Lake Dukdong, which is used as a drinking water source for Gyeongju City, has an algae alert system in place. Lake Dukdong has maintained good water quality, but algae alert level 1 (over 1,000 cells/mL) has been issued in recent years. As a result of Pearson correlation analysis (from May to Oct.), the cell density of Microcystis and Aphanizomenon, which form part of the most harmful cyanobacteria genus, were significantly positively correlated with the water temperature and water storage volume. T-test was performed to compare the data from 2016-2018 and 2019-2021 (from May to Oct.). The average density of harmful cyanobacteria cells increased about six-fold from 54 to 344 cells/mL. There were significant differences in water temperature, pH, total nitrogen (TN), total phosphorus (TP), TN/TP ratio, water storage volume, and cyanobacterial biomass. Water temperature increased from 19.2 to 22.8 ℃. TP concentration increased from 0.017 to 0.028 mg/L. The main cause of the recent increase of harmful cyanobacteria in Lake Dukdong is thought t o be t he i ncrease in w ater t emperature, TP c oncentration, a nd w ater s torage v olume from 2 019 and 2021, resulting in more favorable conditions for cyanobacterial growth.
홍동균,이동화 대한임베디드공학회 2019 대한임베디드공학회논문지 Vol.14 No.6
The smart product market is growing year by year and is being used in many areas. There are various ways of interacting with smart products and users by inputting voice recognition, touch and finger movements. It is most important to detect an accurate hand region as a whole step to recognize hand movement. In this paper, we propose a method to detect accurate hand region in real time in various environments. A conventional method of detecting a hand region includes a method using depth information of a multi-sensor camera, a method of detecting a hand through machine learning, and a method of detecting a hand region using a color model. Among these methods, a method using a multi-sensor camera or a method using a machine learning requires a large amount of calculation and a high-performance PC is essential. Many computations are not suitable for embedded systems, and high-end PCs increase or decrease the price of smart products. The algorithm proposed in this paper detects the hand region using the color model, corrects the problems of the existing hand detection algorithm, and detects the accurate hand region based on various experimental environments.
홍동균,김경래,이형석,박찬금,박용욱,장세진,태경 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.6
Background and Objectives:Angiogenesis is a necessary process for solid tumor to grow in human body, and thought to play an important role in metastasis. In some solid tumor such as the breast cancer and prostatic cancer, the angiogenesis is thought to be one of the most significant prognostic factors that predict the patient survival rate and metastasis. The purpose of this study is to define the significance of angiogenesis in the head and neck squamous cell carcinoma (HNSCC). Subjects and Method:We measured the microvascular density (MVD)HNSCC. The maximal and average MVD was compared with the clinical parameters such as stage, cervical lymph node metastasis, recurrence, and survival rate, obtained through the retrospective review of the medical records. Results:1) The maximal and average MVD correlated with overall stage, T stage and N stage statistically. The MVD were increased accor-ding to the increasement of the T and N stage. 2) The maximal and average MVD showed a significant relationship with 3 year survival rate. 3)Conclusion:The maximal and average MVD may be a significant prognostic factors which can predict the survival rate of the patients with HNSCC. (Korean J Otolaryngol 2002;45:601-7)
홍동균 ( Dong Kyun Hong ),정남지 ( Nam Ji Jeong ),임명 ( Myung Im ),이영 ( Young Lee ),서영준 ( Young Joon Seo ),이증훈 ( Jeung Hoon Lee ) 대한피부과학회 2011 大韓皮膚科學會誌 Vol.49 No.12
Chronic graft-versus-host disease (GVHD) usually presents 100 days after allogenic bone marrow transplantation. Chronic GVHD cutaneous lesions are characterized by lichenoid or sclerodermoid variants. Vesicles, a common presentation in patients with acute GVHD, rarely appear in chronic GVHD. We report a case of a 49-year-old man who presented with bilateral vesicles on lower extremities. He was diagnosed with myelodysplastic syndrome 2 years before and was taking oral cyclosporine after the allogenic bone marrow transplantation. Six months post-transplantation, lichenoid and sclerodermoid lesions developed on his entire body and he was diagnosed with chronic GVHD and eosinophilic fasciitis. A biopsy of the vesicles revealed detached lower margins of the epidermis, necrotized keratinocytes, and infiltration of lymphocytic inflammatory cells. Administration of oral prednisolone alleviated the patient`s symptoms. This is an interesting case showing a new pattern of vesicle appearance after development of typical chronic GVHD lesions. (Korean J Dermatol 2011;49(12):1125~1127)