http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김기흥,류근상,신영철,이형래 진주산업대학교 산업과학기술연구소 2004 산업과학기술연구소보 Vol.- No.11
In order to evaluate six formula of T_(c) presented in the facilities criterion of small basin, the water stages were observed on fifteen mountainous small basin in Sanchung county region. The results of six formula compared with the observed data to evaluate T_(c). All basin area were less than 2.25 ㎢. The average basin area was 1.19 ㎢, the average basin length was 1.65 ㎢, the average basin slope was 6.95%, average length and slope of main channel were 1.86 ㎞ and 7%. The average T_(c) was 33.77 minutes and results of six formula showed the changes in average and standard deviation widely. The conclusions obtained in this study are as follows. The time of concentration was influenced basin slope, basin length, basin slope and channel slope consequently but did not affected the shape factor of basin.
Theoretical and Experimental Analysis of Material Deformation by Microcontact
Rae-Hyeong Ryu,Si-Hyung Lim,Jay I. Jeong,Donghoon Shin,Siyoul Jang,Hong Jae Yim,Kee Sung Lee 한국정밀공학회 2009 International Journal of Precision Engineering and Vol.10 No.2
This paper reports on an investigation of contact damage induced in molds and substrate materials used in micro and nanoimprint lithography. Silicon, polydimethylsiloxane (PDMS), glass, and silicon carbide were studied. A finite element analysis using ABAQUS software was conducted to investigate the stress induced in mold and substrate materials when they come in contact with each other at a uniaxial pressure of 1 MPa. A spherical indentation experiment was conducted for a model study for various indentation loads and numbers of contact cycles. We examined the contact damage during the spherical indentation. Indentation stress-strain curves, surface views of contact damage, and mechanical properties were characterized for the mold and substrate materials.
Scalp metastasis of advanced gastric cancer
Ryu, Hyeong Rae,Lee, Da Woon,Choi, Hwan Jun,Kim, Jun Hyuk,Ahn, Hyein Korean Cleft Palate-Craniofacial Association 2021 Archives of Craniofacial Surgery Vol.22 No.3
Head and neck cutaneous metastasis of advanced gastric cancer is uncommon, and scalp metastasis is particularly rare. We present the case of a 60-year-old man who was diagnosed with cutaneous metastasis on the scalp originating from advanced gastric cancer. The patient was referred to the plastic surgery department for a scalp mass near the hairline. He had been diagnosed with advanced gastric cancer and undergone total gastrectomy and Roux esophagojejunostomy 3 years previously. The differential diagnosis for a single flesh-colored nodule on the scalp included benign tumors such as epidermal cyst or lipoma; therefore, the patient underwent excision and biopsy. In the operative field, the mass was found to be located in the frontalis muscle. The biopsy result showed that the mass was a metastatic lesion of advanced gastric cancer. Whole-body computed tomography revealed a gastric tumor with blood vessel infiltration, peritoneal carcinomatosis, liver metastasis, and multiple disseminated subcutaneous metastases. Although scalp metastasis originating from an internal organ is extremely rare, plastic surgeons should always consider a metastatic lesion in the differential diagnosis if a patient with a scalp lesion has a history of malignant cancer.
유래형(Rae-hyeong Ryu),임시형(Si-Hyung Lim),정재일(Jay I. Jeong),신동훈(Donghoon Shin),장시열(Siyeol Jang),임홍재(Hongjae Im),이기성(Kee-sung Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Contacts between mold and substrate material during a process of a nano-imprint are indispensable for manufacturing LCD. Non-uniform stress and stress concentration can cause the degradation of mold and substrate materials. The stresses increase up to high value due to decreasing size of micro and nano components. Therefore the purpose of this study is to investigate the contact damage behavior of mold and substrate materials for nano-imprint apparatus. We analyzed stress change as a function of load as the line width of substrate material changes. We also examined the contact damages of Silicon, PDMS, Glass and Silicon Carbide materials using spherical indentation. The indentation load and number of cycles of contacts are varied during indentation. Indentation stress-strain curves, surface views of contact damages and mechanical properties are characterized for the mold and the substrate materials. As a result, the mechanical properties and contact damages of the nanostructured SiC showed high damage tolerance.
Development of Multiple-disk Type MR Fluid Brake with Three Modules for Wearable Robots Driving Part
Hyeong-Rae Kim,Ihn-Sik Weon,Soon-Geul Lee,Myung-Jin Choi,Jae-Kwan Ryu 제어로봇시스템학회 2018 제어로봇시스템학회 국제학술대회 논문집 Vol.2018 No.10
The device using MR fluid provides high torque compared to the volume and fast response characteristics. This paper limits the design parameters and sets the target torque to apply the MR brake to the wearable robot driving part. The developed MR brake is designed to determine design parameters using mathematical modeling and to generate a higher torque than the volume by applying a multiple-disk in the modular structure. The design model was magnetic analysis using ANSYS Maxwell and predicted the torque that was generated from the analysis results. Two testbeds were constructed, one to verify the performance of the manufactured MR brake and the other to check the generated torque and response characteristics according to the applied voltage. The experimental results show that the MR fluid brake produced is an efficient structure for generating high torque compared to the volume. It is confirmed that a fast response of the ms (millisecond) unit and a stable torque drive are possible through the confirmation of the response characteristics.
Seung-hyong Ryu,Hyeong-rae Lee,Dong-Kyun Lee,Kyeong-woo Park 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.11
Objective In this study, we aimed to develop a model predicting individuals with suicide ideation within a general population using a machine learning algorithm. Methods Among 35,116 individuals aged over 19 years from the Korea National Health & Nutrition Examination Survey, we selected 11,628 individuals via random down-sampling. This included 5,814 suicide ideators and the same number of non-suicide ideators. We randomly assigned the subjects to a training set (n=10,466) and a test set (n=1,162). In the training set, a random forest model was trained with 15 features selected with recursive feature elimination via 10-fold cross validation. Subsequently, the fitted model was used to predict suicide ideators in the test set and among the total of 35,116 subjects. All analyses were conducted in R. Results The prediction model achieved a good performance [area under receiver operating characteristic curve (AUC)=0.85] in the test set and predicted suicide ideators among the total samples with an accuracy of 0.821, sensitivity of 0.836, and specificity of 0.807. Conclusion This study shows the possibility that a machine learning approach can enable screening for suicide risk in the general population. Further work is warranted to increase the accuracy of prediction.