http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Artificial Muscle Actuator Based on the Synthetic Elastomer
Nguyen Huu Chuc,Ja Choon Koo,Young Kwan Lee,Jae Do Nam,Hyouk Ryeol Choi 대한전기학회 2008 International Journal of Control, Automation, and Vol.6 No.6
In this paper, we present an artificial muscle actuator producing rectilinear motion, called the Tube-Spring-Actuator (TSA). The TSA is supposed to be a prospective substitute in areas requiring macro forces such as robotics. It is simply configured from a synthetic elastomer tube with an inserted spring. The design of the TSA is described in detail and its analysis is conducted to investigate the characteristics of the actuator based on the derived model. In addition, the performance of the proposed actuator is tested via experiments.
Synthesis of Carbon Nanotubes on Steel Foils
Nguyen Van Chuc,Nguyen Duc Dung,Phan Ngoc Hong,Le Dinh Quang,Phan Hong Khoi,Phan Ngoc Minh 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5
Carbon nanotubes (CNTs) were synthesized by using a thermal chemical vapor deposition (CVD) at 800 ℃ in a mixture of C₂H₂, H₂ and N₂ gases with steel foils as both catalysts and substrates. More than 2 grams of CNTs were grown on approximately 7 grams of steel foil with a 0.5 cm² surface area after 30 minutes of growth. The effects of CVD parameters, such as the growth temperature and the deposition time, on the size and the morphology of the CNTs were studied using scanning electron microscopy (SEM). We found that the optimized temperature and growth time for having high quality CNTs were 800 ℃ and 30 minutes, respectively. The purity of the CNTs was evaluated by using thermogravimetric analysis (TGA) and the result showed that the carbon content was approximately 93 wt.%. The graphite crystallinity of the CNTs was analyzed by using Raman spectroscopy. The steel foil was found to maintain its catalytic behavior after several growths. The technique holds great promise for use in mass production (approximately 120 grams CNTs per day) with signicantly reduced cost. Carbon nanotubes (CNTs) were synthesized by using a thermal chemical vapor deposition (CVD) at 800 ℃ in a mixture of C₂H₂, H₂ and N₂ gases with steel foils as both catalysts and substrates. More than 2 grams of CNTs were grown on approximately 7 grams of steel foil with a 0.5 cm² surface area after 30 minutes of growth. The effects of CVD parameters, such as the growth temperature and the deposition time, on the size and the morphology of the CNTs were studied using scanning electron microscopy (SEM). We found that the optimized temperature and growth time for having high quality CNTs were 800 ℃ and 30 minutes, respectively. The purity of the CNTs was evaluated by using thermogravimetric analysis (TGA) and the result showed that the carbon content was approximately 93 wt.%. The graphite crystallinity of the CNTs was analyzed by using Raman spectroscopy. The steel foil was found to maintain its catalytic behavior after several growths. The technique holds great promise for use in mass production (approximately 120 grams CNTs per day) with signicantly reduced cost.
Highly efficient adsorption of arsenite from aqueous by zirconia modified activated carbon
Pham Ngoc Chuc,Nguyen Quang Bac,Dao Thi Phuong Thao,Nguyen Trung Kien,Nguyen Thi Ha Chi,Nguyen Van Noi,Vo Thang Nguyen,Nguyen Thi Hong Bich,Dao Ngoc Nhiem,Dinh Quang Khieu 대한환경공학회 2024 Environmental Engineering Research Vol.29 No.2
Fabrication and Control of Rectilinear Artificial Muscle Actuator
Nguyen Huu Chuc,Nguyen Huu Lam Vuong,Duk Sang Kim,Hyung Pil Moon,Ja Choon Koo,Young Kwan Lee,Jae-Do Nam,Hyouk Ryeol Choi IEEE 2011 IEEE/ASME transactions on mechatronics Vol.16 No.1
<P>In this paper, we present an artificial muscle actuator based on a dielectric elastomer called the “multistacked actuator.” The actuator is made from a new material, the synthetic elastomer, developed by the authors. The proposed actuator is configured with multiple stacked synthetic elastomer films coated with compliant electrodes on both sides. This design enables the actuator to generate rectilinear motion with high force density. In addition, the actuators can be fabricated in various geometries to meet the requirements of the applications. We develop a pulsewidth-modulated proportional-integral-derivative (PWM-PID) feedback controller based on the high-voltage switching circuit and implemented it to drive the proposed actuator. Finally, the performance of the actuator is evaluated via experiments.</P>
Anatomic characteristics and novel transplantation model of the canine uterus
Xuan-Hai Do,Thanh-Hai Tong,Trung-Chuc Nguyen,Tuan-Anh Ngo,Minh-Trang Thi Tran 대한이식학회 2023 Korean Journal of Transplantation Vol.37 No.2
Background: In Vietnam, the rate of absolute uterine factor infertility is increasing, but no study has been published on uterine transplantation. The present study was designed to comprehensively observe the canine uterine anatomy and to examine the possibility of using a living canine donor for uterine transplantation training and further research. Methods: Ten female Vietnamese mixed-breed dogs were sacrificed for anatomical research, and 15 additional pairs were used to evaluate the novel uterine transplant model. Results: The anatomic features of the canine uterus differed considerably from those of the human uterus, with the uterine vessels originating from branches of the pudendal vessels (also known as the vaginal vessels). The uterine vascular pedicle had a small diameter (1 to 1.5 mm for arteries and 1.2 to 2.0 mm for veins) and required manipulation under a microscope. To perform uterine transplantation, the donor specimen’s artery and vein lengths were successfully reconstructed by anastomosis between both sides of the vasculature using autologous Y-shaped subcutaneous veins. The living-donor uterine transplantation model constructed in this study was feasible, with the transplanted uterus surviving in 86.7% of cases (13/15). Conclusions: Uterine transplantation was successfully performed in a Vietnamese canine living donor model. This model could be helpful in uterine transplantation training and improve the transplantation success rate in humans.
김덕상,진성문,김백철,Nguyen Huu Chuc,Ngyuen Huu Lam Vuong,안광준,Vuong Hong Phuc,구자춘,문형필,이영관,남재도,최혁렬 제어로봇시스템학회 2009 제어로봇시스템학회 합동학술대회 논문집 Vol.2009 No.12
In this paper, we have proposed the novel tactile sensor using dielectric elastomer. Our sensor can be considered as a capacitive tactile sensor. A capacitive tactile sensor is based on a capacitor, where the dielectric is made of a compliant material so that the capacitance changes due to the strain exerted on the sensor. In the proposed design, capacitive tactile sensor is implemented using commercially available capacitance to digital converter integrated circuits(CDC), commonly used for example in cell phones. When we touch the sensor surface, the CDC detects the variation of a capacitance and we can know the position of touch through the array of electrodes on the surface. In this paper, we describe the structure of the sensor, material, fabrication process, system configuration and experimental results.