Indonesia is a tropical area and located under the equator line with more than six hours of sunlight a day or about 2400 hours a year. Solar energy has an intensity between 0.6-0.7 kW/m2 and has a potential of 207.8 G...
Indonesia is a tropical area and located under the equator line with more than six hours of sunlight a day or about 2400 hours a year. Solar energy has an intensity between 0.6-0.7 kW/m2 and has a potential of 207.8 GWe (electric). This potential can be utilized to reduce the use of fossil energy by harvesting solar energy and transferring it in a helical coil heat exchanger (HCHE) type. This study aims to develop a special proposed heat exchanger design to collect solar thermal energy. As the energy supply is intermittent, a thermal energy storage system is installed. The design of HCHE has coil diameter of 10 mm with thickness of the tube 0.5 mm. HCHE performance test was performed by feeding water to the heat exchanger at a flow rate of 0.006 kg/s where the inlet water temperatures was 27.2˚C. At the outlet, the average temperature was 32.3˚C. During the test, the maximum temperature can be reached by the system was 269.4˚C. This indicates that the solar thermal collector design is working and potentially can be scale-up for energy generating system.
Wind energy is one of popular sources of renewable energy that massively used to generate electric power nowadays. Among wind generator technologies, Doubly Fed Induction Generator (DFIG) is placed as the first domina...
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This paper proposes a hand exoskeleton system for evaluating hand functions. To evaluate hand functions, the hand exoskeleton system must be able to pull each finger joint, measure the finger joint angle and exerted f...
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This paper proposes a hand exoskeleton system for evaluating hand functions. To evaluate hand functions, the hand exoskeleton system must be able to pull each finger joint, measure the finger joint angle and exerted force on the finger simultaneously. The proposed device uses serially connected 4-bar linkage structures, which have two embedded actuators with encoders and two loadcells per finger, to move each phalanx independently and measure the finger joint angles. A modular design was used for the exoskeleton, to facilitate the removal of unnecessary modules in different experiments and improve convenience. Silicon was used on the surface of the worn part to reduce the skin irritation that results from prolonged usage. This part was also designed to be compatible with various finger thicknesses. Using the proposed hand exoskeleton system, finger independence, multi-finger synergy, and finger joint stiffness were determined in five healthy subjects. The finger movement and force data collected in the experiments were used for analyzing three hand functions based on the physical and physiological phenomena.
Collaborative robots are expected to physically interact with humans in daily living and workplace, including industrial and healthcare settings. A related key enabling technology is tactile sensing, which currently r...
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Radar shows great potential for autonomous driving by accomplishing long-range sensing under diverse weather conditions. But radar is also a particularly challenging sensing modality due to the radar noises. Recent wo...
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Invited for this month's cover is the group of Nano Horizons Lab hosted by Prof. Yu-Ze Chen. The cover picture shows the lateral deposition of Zn guided by zincophilic Cu2Te flakes, resulting in the suppression of...
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Invited for this month's cover is the group of Nano Horizons Lab hosted by Prof. Yu-Ze Chen. The cover picture shows the lateral deposition of Zn guided by zincophilic Cu2Te flakes, resulting in the suppression of dendrite growth. Read the full text of the Research Article at 10.1002/batt.202300107.
The article deals with changes in the density of pulsating water and air flow generated in pulsating flow ejector. Transformation of the fluid motion equation to Lighthill's equation describing density change and ...
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Networked robotic systems, such as connected vehicle platoons, can improve the safety and efficiency of transportation networks by allowing for high-speed coordination. To enable such coordination, these systems rely ...
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