We fabricated coplanar homojunction a-IGZO TFTs that are highly stable under AC and DC bias-temperature-stress. For TFTs of the size W/L = 60μm/10μm, the stress-induced threshold voltage shifts are all within -0.35 V. A comprehensive investigation of AC BTS stress polarity, pulse width, and duty cycle dependence is presented. We find that higher frequency of bipolar AC pulses increases the devi...

At first sight, recent studies investigating the temporal limits of attentive tracking show contradictory outcomes. Attentively tracking an object in an ambiguous apparent motion display can have an upper limit of around 0.4 revolutions per second (rps) [Horowitz, T. S., Holcombe, A. O., Wolfe, J. M., Arsenio, H. C., & DiMase, J. S. (2004). Attentional pursuit is faster than attentional saccade...

The Neighbor Discovery is a process by which a node identifies its neighbor nodes in its vicinity. We are particular interested in Neighbor Discovery problem in duty-cycle mobile sensor networks in this paper, where a mobile sensor needs to detect its neighbor nodes during its wake-up states. We proposed an algorithm which utilizes the boundary nodes in the communication range of the node to pr...

We report the theory and experiment for an amplitude modulator and wavelength converter based on an electrodecoated asymmetric-duty-cycle periodically poled lithium niobate (PPLN). In a 56%/44% domain-duty-cycle PPLN crystal, we modulated the amplitude of the 532-nm second-harmonic output and measured a normalized half-wave voltage of 1:1 V d ðlmÞ=leff (cm), where d is the separation of the ele...

Energy conversation is one of the primary objectives of duty cycle MAC protocols. Different synchronous and asynchronous duty cycle MAC protocols have been proposed in recent years. These protocols perform well under low traffic loads, but efficiency of these protocols degrade under high traffic loads. We present an asynchronous hybrid duty cycle MAC protocol called Hybrid MAC (H-MAC), which us...

Intelligibility of sentences gated with a single primary rate (0.5-8 Hz, 25-75% duty cycle) or gated with an additional concurrent rate of 24 Hz and a 50% duty cycle was examined in older normal-hearing and hearing-impaired listeners. With a stronger effect of age than hearing loss, intelligibility tended to increase with primary rate and duty cycle, but varied for dual-rate gating. Reduction i...

The integration of ion mobility spectrometry (IMS) with a trap-based mass spectrometer (MS) such as Orbitrap using the dual gate approach suffers from low duty cycle. Efforts to improve the duty cycle involve the utilization of Hadamard transform-based double multiplexing which significantly improves the signal-to-noise ratio and duty cycle of the ion mobility-Orbitrap mass spectrometry (IM-Orb...

Research on data routing strategies for wireless sensor networks (WSNs) has largely focused on energy efficiency. However rapid advances in WSNs require routing protocols which can accommodate new types of energy source and data of requiring short end-to-end delay. In this paper, we describe a duty-cycle-based low-latency geographic routing for asynchronous energy-harvesting WSNs. It uses an al...

Energy constraints in wireless sensor nodes necessitate the design and development of energy-efficient MAC protocols to arbitrate access to the shared communication medium. While there exists a plethora of sensor MAC protocols, these protocols do not individually vary the duty-cycle of each sensor according to local connectivity status, to maximize energy savings. In this paper, we propose A-MA...

Energy efficiency is an important design paradigm in Wireless Sensor Networks (WSNs) and its consumption in dynamic environment is even more critical. Duty cycling of sensor nodes is used to address the energy consumption problem. However, along with advantages, duty cycle aware networks introduce some complexities like synchronization and latency. Due to their inherent characteristics, many tr...