Sec 2

Chiayi, Taiwan
Chiayi, Taiwan
Time filter
Source Type

Wang D.-C.,University Road | Chen G.-Y.,National Yunlin University of Science and Technology | Chen K.-Y.,University Road | Tsai C.-H.,Sec. 2
IET Nanobiotechnology | Year: 2011

In this study, an alkanethiol-assisted self-assembly of Au nano-particles and its size tunable technique were confirmed. To fabricate a one-dimensional (1D) template, λ-DNA was first laid on mica substrate by dropping diluted λ-DNA solution, 12.6ng/l, on freshly cleaved mica. By dropping colloidal gold solution on mica surface with the DNA templates laid on it, the λ-DNA was then pulled straight via capillary force by applying solvent absorbing tissue at outer circumference of the mica substrate. Moreover, it fixed on mica via gravity force and Van der Waals force between mica surface and the DNA. Au nano-particles would be arrayed along the straight DNA molecules to form 1D Au arrays. Then based on the synthesis of 1D nano-structure via DNA template and Au nano-particles, the simple 2D nano-structure, a ring, would also be studied. © 2011 The Institution of Engineering and Technology.

Chang E.-T.,Sec. 3 | Lin D.-B.,Sec. 3 | Tang I.-T.,Sec. 2 | Houng M.-P.,University Rd
2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010 | Year: 2010

A printed chip type antenna using monopole spiral slot structures with system ground for digital video broadcasting-handheld (DVB-H) signal reception in the UHF band is proposed. By utilizing the eight quarter-wavelength spiral slot l a radiator in configuration. In this case, the occupied area of the monopole slot chip antenna on the system circuit board can be further reduced. Antenna has a compact size of 20x20x0.8mm3. It size is minimized so that it can be easily installed to mobile handset. The simulated and measured results show that the impedance bandwidth covers the DVT (470-860 MHz) band with return loss |S11| than 5. The antenna can get omnidirectional radiation pattern in the whole frequency band. The measurement result is agree with simulation. ©2010 IEEE.

Lin W.-J.,University Rd | Houng M.-P.,University Rd | Lin D.-B.,Sec. 3 | Tang I.-T.,Sec. 2
2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010 | Year: 2010

A novel method for notch implementation in ultra-wideband (UWB) bandpass filter using open circuited metal lines embedded in a defected ground structure (DGS) is proposed. Distinct from traditional notch implementation, the proposed method uses the additional metal lines with half waveguide length embedded in defected ground structure to produce additional notch band behavior based on the DGS bandpass behavior. Furthermore, the equivalent circuit model of the proposed UWB BPF with notch implementation is established for explaining the circuit behaviors more explicitly. In this way, the proposed circuit has a very small size, only amounting to 0.41 by 0.22 guided wavelength at the center frequency of 6.85 GHz. The experimental filter has a notchband frequency of 5.5 GHz, with two observable attenuation poles at 1.65 and 11.36 GHz, respectively. The measured BPF insertion loss is less than 1.0 dB throughout the passband of 3.1 to 10.6 GHz, and the variation of group delay is less than 0.2 ns in this band, except for the notched band. ©2010 IEEE.

Chi M.,Sec 2 | Huang R.,2 Pei Ning Road | Wu T.,2 Pei Ning Road | Fou T.,2 Pei Ning Road
Key Engineering Materials | Year: 2015

Circulating fluidized bed combustion (CFBC) fly ash is a promising admixture for construction and building materials due to its pozzolanic activity and self-cementitious property. In this study, CFBC fly ash and coal-fired fly ash were used in Portland cement to investigate the pozzolanic and cementitious characteristics of CFBC fly ash and the properties of cement-based composites. Tests show that CFBC fly ash has the potential instead of cementing materials and as an alternative of pozzolan. In fresh specimens, the initial setting time of mortars increases with the increasing amount of cement replacement by CFBC fly ash and coal-fire fly ash. In harden specimens, adding CFBC fly ash to replace OPC reduces the compressive strength. Meanwhile, CFBC fly ash would results in a higher length change when adding over 30%. Based on the results, the amount of CFBC fly ash replacement cement was recommended to be limited below 20%. © (2015) Trans Tech Publications, Switzerland.

Chi M.,Sec 2 | Huang R.,2 Pei Ning Road | Lu W.,Sec 2
Applied Mechanics and Materials | Year: 2012

This study presents an investigation into high-temperature resistance of alkali-activated slag concrete (AASC). Sodium oxide (Na2O) concentrations of 4%, 5% and 6% of slag weight and liquid sodium silicate (SiO2) with modulus ratio of 0.8 (mass ratio of SiO2 to Na2O) were used as activators to activate granulated blast furnace slag (GBFS). All cylindrical specimens with the same binder content and liquid/binder ratio of 0.5 were cast and cured in the air, under the saturated limewater and in a curing room at relative humidity of 80% RH and temperature of 60 °C, respectively. Test results demonstrate that the high-temperature resistance of AASC decreased with an increase of temperature. The compressive strength and high-temperature resistance of AASC improved with an increase dosage of Na2O and AASC cured at relative humidity of 80% RH and temperature of 60 °C has the superior performance, followed the AASC by air curing and saturated limewater curing. The higher compressive strength and superior high-temperature resistance have been obtained in AASC than comparable OPC. © (2012) Trans Tech Publications, Switzerland.

Huang C.-N.,Sec. 2 | Yu Z.-Z.,Sec. 2 | Lan C.-K.,Sec. 2
Applied Mechanics and Materials | Year: 2014

Most of days, the summer temperature in Taiwan is higher than 30 degree Celsius. Where, heat dissipation for devices becomes more difficult and needs more electric power. In addition, devices discharging waste heat via traditional ways that accelerates global warming. In order to serve above problems, a self-balanced cooling system is developed. Based on Stirling engine, waste heat is recycled and transformed into a kinetic power. In this paper, this power is used to relieve heat via a fan by devices themselves. Besides, for higher heat input yields larger power to drive a fan and vice versa to Stirling engine, a self-cooling cycle naturally forms under above autonomous control. The feasibility assessment will be confirmed via simulation studies. © (2014) Trans Tech Publications, Switzerland.

Huang C.N.,Sec. 2 | Chen K.H.,Sec. 2 | Lin D.T.W.,Sec. 2
Applied Mechanics and Materials | Year: 2014

For the passive and semi-active suspensions are characterized as with constant parameters which cannot cope with time-variant road conditions, the suspension results are difficult to be satisfied. Although, the active ones are better than previous two on suspension performance, until now which are still far from real application for the drawbacks of complicated structure, large volume, costly, and difficult maintenance. Here, Ball Screw (BS) is with the characteristics of smaller volume, precise positioning, and well handling high-speed forward and backward transmissions. Instead of hydraulic or pneumatic mechanisms used for vehicle suspension, BS is adopted to be the main body of the proposed New Adaptive Suspension System (NASS). Besides, in order to overcome the unavoidable time-delay resulted from mechanical or computational operations, the Kalman filter, integrated with suspension controller, is used to estimate the road conditions. The effectiveness and feasibility of this proposal are confirmed through simulation studies. © (2014) Trans Tech Publications, Switzerland.

Hsu J.C.,Sec.2 | Gong J.,Sec. 3 | Huang C.F.,Sec. 2
Applied Mechanics and Materials | Year: 2014

A new automated-switching precision decade capacitor for applications in industries was designed and tested. By using coaxial microwave switches, the automated-switching precision decade capacitor can be automatically set by electrical TTL signals controlled by a computer. To prevent capacitance from drifting caused by variations of ambient temperature, the internal temperature of the automated-switching precision decade capacitor was effectively kept constant using a temperature-controlled oven with sufficiently thermal isolation. Furthermore, to fulfil the compact-size requirement for using at a high frequency, SMD capacitors with NP0 dielectric were used. The temperature stabilities and linearity of the automated-switching precision decade capacitor are presented in this paper. © (2014) Trans Tech Publications, Switzerland.

Loading Sec 2 collaborators
Loading Sec 2 collaborators