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Utilizing an integrated optical-tunable-delay-line, reversely-modulated single sideband modulation, and Nyquist subcarrier modulation, we demonstrate an 8 Gbps mm-wave beam steered link with a spatial-spectral efficiency of 16 bits/s/Hz.
A conventional bull's eye antenna has a great potential to terahertz technologies, while its narrow band nature limits its ability for multi-frequency applications. Here we proposed an split-joint bull's eye (SJBE) structure with optimized aperture, which can achieve multi-frequency transmission and high concentration.
We present the first installation and characterization of a phased array feed (PAF) on the 64 m Parkes radio telescope. The combined system operates best between 0.8 GHz and 1.74 GHz where the beamformed noise temperature is between 45 K and 60 K, the aperture efficiency ranges from 70% to 80%, and the effective field of view is 1.4 deg2 at 1310 MHz. After a 6-month trial observing program at Parkes,...
This paper for the first time successfully demonstrates a Logic-compatible, highly reliable, automotive-grade 16Mb flash macro with self- aligned, split-gate FG-based flash cell embedded into a 40nm Low Power CMOS with copper low-K interconnects. Key Features of the flash macro: Dual power supply with operation temperature from -40 to 150ºC; Random Read access 10ns @ worst case condition; Low active...
In practical power converter based circuits, voltage and current limits of power converters are inevitable. However, there is a lack of comprehensive investigation of steady state operating boundaries of HVDC systems with converter voltage and current limits. This paper proposes a modified algorithm based on current injection Newton-Raphson method. It is capable of solving the power flow of multi-infeed...
NdFeB magnets have a wide range of applications in various electronic devices and driving motors [1]. Anisotropic NdFeB magnets are more attractive for their ability to provide high energy product and high heat resistant [2]. One approach to fabricate anisotropic nanocrystalline NdFeB magnets is hot press and hot-deformation of quenched ribbons [3, 4]. This traditional way, however, will lead to excessive...
In this study, we apply the concept of lean system and the logic of Theory of Constraint to Machine tool industry which is one of the most competitive industries in Taiwan. The main objective of this study is to improve the due-date performance by using process of lean thinking and Strategy & Tactic Tree of TOC. After the lean thinking and TOC had been implemented, the efficiencies are improved...
We report the field-induced surface deformation of Si nano-apex and the achieving of highly reliable gated Si nanoemitters. It was found that the crystalline Si nano-apex deformed to amorphous structure at a low macroscopic field (∼0.6 V/nm) with an extremely low emission current (∼1 pA). First-principle calculations showed that the arsenic donor would increase the electric polarization on the Si...
In this work, silver nanocomposite films have been deposited using an atmospheric pressure plasma jet system. The plasma jet was characterized using optical emission spectroscopy. The methods of SEM, XPS and GD-OES were implemented for the morphology and stoichiometry of the composite films. The result reveals the morphology and stoichiometry of the films can be tailored during the process. Antibacterial...
A physical based analytic model of metal oxide based RRAM cell under DC and pulse operation modes is presented. In this model, the transport behaviors of oxygen vacancies and oxygen ions, metal conductivity, electron hopping and heat conduction and the parasitic capacitance and resistance effects are covered. The developed analytic model is verified and calibrated by measured data. Furthermore, we...
A novel phase change memory (PCM) cell with Additional Top Electrode (ATE) is introduced to investigate the scaling behavior of the off-state with the dimension of amorphous state region. The electrical conduction in ultra-thin amorphous state layer is investigated. The trap spacing is one of the key parameters that govern the conduction mechanism and threshold voltage in the sub-threshold region...
Co-verification technologies are characterized by two inherently conflicting issues: signal observability and simulation performance. To overcome these limitations, we proposed a run-time RTL debugging methodology for FPGA-based co-simulation as well as debugging methodology for a FPGA emulator with testbench synthesis engine. The first method provides internal nodes probing on an event-driven co-simulation...
The feasibility of using spectral analysis as an image feedback modality for histotripsy tissue fractionation was investigated in this study. Spectral analysis analyzes the frequency domain of the backscattered ultrasound RF signal, and its corresponding spectral parameters have been shown to have relationships with scatterer diameter and concentration. Ex vivo canine liver was dissected and embedded...
The Northeast shelterbelt project is a part of the Shelter Forest System Program in Three-North Regions of China. By far, the third phase project has been completed, and the fourth phase project is on the point of completion. This paper chose the Yushu, Nong'an, Dehui and Fuyu in midwestern Jilin province as the research areas, selected three phase shelterbelt data and land use data at Sep. 25, 1988,...
Three advanced direct contact via processes with Ta/TaN/Ta tri-layer barrier and the electromigration of their structures were comparatively investigated. The process of Ar+ resputtering with median removal of tri-layer barrier shows the lowest defective die percentage. It also shows the highest activation energy and longest downstream electromigration lifetime.
We report the effect of a Ta/TaN/SiCN tri-layer barrier on the electrical properties and thermal stability of single damascene (SD) lines for Cu-ultra low k (2.3) integration. It was found that by incorporating a thin SiCN layer between the Ta/TaN barrier and ultra low k material, the leakage current can be significantly reduced and the breakdown voltage can be enhanced. A thermal treatment at 200°C...
InSbN alloys are the new narrow bandgap semiconductors capable of broadband and long wavelength infrared photodetection. This paper reports the annealing conditions on the properties and quality of InSbN alloys, fabricated by multi-step ion implantation. The InSbN samples were annealed at different annealing methods, temperatures, and periods of time. They were characterized by various techniques,...
The wind load and wind field environment of far-ocean tall building second period construction are analyzed under 24 different wind directions using CFD method. It shows that the absolute value of body coefficient of tall buildings is bigger at bottom than on top as a whole. And the body coefficient of most vertical surfaces of the building is minus, however the positive value only appears on the...
This paper describes an automatic algorithm to extract the knee frame of reference from 3D MR isotropic scans. The method ultimately seeks to determine two lines that are tangent to the bottom of the condyles in an axial and a coronal plane. It consists of three major parts, initial detection of the knee joint using Hidden Markov Models, femur segmentation using Random Walker segmentation, and finally...
In this paper, we present a mathematical model of near-hover attitude dynamics and control in flapping flight. Then we apply this model to fruit fly (Drosophila) as an example. The attitude dynamics are derived from the complete 6-DOF equations of motion. Stability derivatives are estimated based on quasi-steady aerodynamic models of Flapping counter-torques (FCTs). Control derivatives are derived...
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