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Human mobility has been studied extensively in various biomedical contexts with applications in clinical rehabilitation, disease diagnosis, health risk prognosis, and general performance assessments. In this paper, we present ATOMHP (Analytical Technologies to Objectively Measure Human Performance) Kinect: a system to objectively quantify human performance using the Microsoft Kinect as a single camera...
We developed a fiber-integrated plasmonic probe, which can transport light in subwavelength scale. The probe provides a new method to collect fluorescence of quantum emitters efficiently and can transport quantum entangled states beyond the diffraction limit.
We introduce the transverse waveguide-mode degree of freedom to quantum photonic integrated circuits, and demonstrate the coherent conversion of a photonic quantum state between path, polarization and transverse waveguide-mode degrees of freedom on a single chip.
Crowdsensing is a sensing method which involves participants from general public to collect sensed data from their mobile devices, and also contribute and utilize a common database. To ensure a crowdsensing system to operate properly, there must be certain effective and efficient incentive mechanism to attract users and stimulate them to submit sensing data with high quality. Intuitively, the agreement...
Due to the open access nature of wireless communication environment, physical layer security has brought increasingly high attention in recent years, attempting to protect the confidential communication away from eavesdroppers. In contrast to the current secrecy designs, which generally exploit the spatial Degree-of-Freedom (DoF) (e.g. MIMO and cooperative relay approaches) or the temporal DoF (e...
A photonic method for microwave signal generation by utilizing the optoelectronic oscillator (OEO) is presented. The OEO is mainly composed of the polarization multiplexed double loops to suppress the side modes, and the phase-shifted fiber Bragg grating (PS-FBG) to select the oscillation frequency. The experimental results show that the generated microwave signal can be tuned from 1 to 4 GHz by changing...
The database-driven CRN has emerged as a promising solution for the spectrum scarcity issue. However, it also raises severe privacy concerns. Although there are some existing works on this topic, they are far from practical due to their restrict on particular database structures or extremely heavy computation and communication overhead. To address these issues, in this paper we develop two practical...
Future automated vehicles will rely on V2V communication to exchange information about their motion states and take corresponding control actions, to enhance road safety and efficiency. Evaluating the trustworthiness of such data in a VANET is critical as malicious vehicles may inject false data which will undermine the benefits of V2V communication and lead to severe consequences, such as collisions...
Unmanned aerial vehicles (UAVs) have been applied for both civilian and military applications; scientific research involving UAVs has encompassed a wide range of scientific study. However, communication with unmanned vehicles are subject to attack and compromise. Such attacks have been reported as early as 2009, when a Predator UAV's video stream was compromised. Since UAVs extensively utilize autonomous...
An integrated optoelectronic Oscillator (IOEO) which combines the integrated technologies of photonics and electronics has been developed. All of the necessary elements (for example, laser, photo-detector, electrical amplifier, electrical filter, etc.) have been assembled on a print circuit board (PCB) within size of 5∗6 cm. To the best of our knowledge, it is the first time to integrate both the...
We presented a novel technique of generating arbitrary waveforms based on wavelength-to-time mapping (WTTM) without any dispersion. A variety of waveforms has been generated, including Gaussian, square, and other specific waveforms, is demonstrated experimentally. The arbitrary waveform generator feathers superior advantages such as low power loss, simple structure, and high reconfiguration.
This paper focuses on addressing the decentralized data fusion (DDF) problem in dynamic sensor networks based on Chernoff rule. Generally, the Chernoff rule is challenging to implement since the fused probability density functions (pdfs) that cannot be obtained in closed form. Besides, the existing works for implementing Chernoff rule are mostly confined to iterative fusion of two sensors. To address...
Increasing demand has led to wireless spectrum shortages, with many parts of the existing spectrum being heavily used. Dynamic spectrum access (DSA) has been proposed to allow cognitive radio networks to use existing spectrum more efficiently. It will allow secondary users to transmit on already allocated spectrum on a non-interference basis. Cognitive radios are able to change bandwidth and other...
Chemical mechanical polishing (CMP) performance influence the reliability of TSV process, because the wafer chip-to-chip vertical interconnections for the next process request the TSV wafer a flat surface without defects after CMP. The influence of ECD process to the CMP defects, further to the via-filling effect, was investigated. Thickness uniformity, top surface morphology and the grain orientation...
Since solder joints may work in corrosion media, corrosion products can be easily formed and then enhance current transport resistance in practice. It is of great importance to study the corrosion behavior of SAC305 solders added with different nanoparticles. The electrochemical corrosion behaviour of Sn-3Ag-0.5Cu alloys with the addition of nano-Ag3Sn and nano-Cu3Sn was investigated in 3.5 wt. %...
The HFSS electromagnetic simulation model of a complete transmission path structure was established, analyzed the signal integrity of complete transmission path in high frequency and acquired the return loss of complete transmission path based on the model. The effect of external diameter of via, inner diameter of via and height of via to signal integrity of complete transmission path were studied...
O2 plasma treatment was performed on the JSR THB-430N negative UV photoresist to modify the surface wettability for micro-bumps electrodepositing. Wettability of photoresist was enhanced after O2 plasma treatment. The samples were placed for different time at room temperature. Micro-FTIR indicated that the hydroxyl groups were introduced on the surface of photoresist after O2 plasma surface treatment,...
In the past few years, organic film prepared on the silicon (Si) surface has become attractive owing to the wide range of potential application, low cost and good performance. In this paper, perfluorinated organic film was prepared on the Si surface in aqueous solution using one-step dipping method. On the Si surface, 4-nitrobenzene diazonium (NBD) tetrafluoroborate was firstly reduced with the presence...
A hierarchically structured Cu-Ni-P film fabricated via one-step route of electroless plating is reported. The morphology of deposits can be controlled by adjusting the additive in electrolyte. Due to the synergistic crystalline modification of polyethylene glycol (PEG), Janus Green B (JGB) and Cl−, the as-prepared Cu-Ni-P film exhibits pine-like architecture, about 2 µm in height and 1.5µm in root...
Insulated gate bipolar transistor (IGBT) modules are essential in power electronic application. Due to the improvement in chips and packaging, the maximum operation junction temperature Tvj,op of the latest IGBT module has been increased up to 175°C, comparing to 150°C of the previous generation. With the enhancement of power density, its application at high temperature gives rise to more concerns...
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