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In 2005 the Department of the Interior, through the Minerals Management Service (MMS), issued a Notice to Lessees (NTL No. 2005-G05) requiring collection of ocean current speed and direction profiles in active oil and gas exploration and production sites. The NTL stipulates that ocean current profiles be collected down to 1000 meters (from ∼ 30 meters) at a minimum of 20 minute intervals and be delivered...
Shell Exploration & Production Company is working with academic, non-profit, and federal stakeholders in the Gulf of Mexico to develop and implement long term environmental offshore monitoring programs. One such program, started in 2008 between Shell and the National Oceanic and Atmospheric Administration, has expanded to include new collaborators working together to operate multiple underwater...
It is usual for a consumer to search a product based on its category and go to related kind of shop to buy a product, e.g. food in supermarket, a pencil from a stationary shop and etc. While it is not uncommon nowadays for a shop to sell various categories of goods at the same time, like a newspaper stand do sell toys, an accessory shop has stationary. However, consumer may not easily notice and purchase...
With the popularization of mobile smart devices (e.g., smartphones, tablets), the number of mobile game players increases significantly. This makes mobile gaming industry rise and take up a large piece of global game market. Different from the traditional players playing games on their personal computers with wired local area network or Wi-Fi access, mobile game players nowadays play online games...
Decomposed cloud gaming is a novel paradigm to deliver gaming as a service to mobile terminals. In such a system, video games are decomposed into software components that are cognitive to players' behavior and execution environments in both cloud and mobile devices. However, in order to balance the workload distribution between cloud and mobile terminals in a real system, there are still a number...
Granger causality is proposed to fuse stock prices and social media sentiment information for stock market prediction. Sentiment extraction is performed on the Twitter data from major stock companies. Analysis shows that authoritative user's sentiment affects the other users after an event with the lag of 3 days. The prediction is performed for Twitter and stock data from four companies. The sentiment...
This paper proposes a distributed controller placement problem that finds out the pareto optimal solutions minimizing the switch-to-controller delay, controller-to-controller delay, and controller load imbalance for wide area software defined networks. We introduce a general model that not only considers the controller placements but also the switch assignments, so that this model can further be used...
As the world's aging population grows, fall is becoming a major problem in public health. It is one of the most vital risk to the elderly. Many technology based fall detection systems have been developed in recent years with hardware ranging from wearable devices to ambience sensors and video cameras. Several machine learning based fall detection classifiers have been developed to process sensor data...
This paper proposes a geometric feature-based method to solve the Simultaneous Localization and Mapping (SLAM) problem in an unknown structured environment using a short range and low Field of View (FoV) measurement unit such as Kinect sensor. A RANdom SAmple Consensus (RANSAC) based algorithm is used for feature detection, and a grid-based point cloud segmentation method has been introduced to improve...
Possible drug side-effects (SEs) are usually verified by many years of repeated clinical trials. Despite the effort, some drugs are still expected to cause adverse reactions in some patients. To better predict drug SEs without having to go through the laborious processes of testing and re-testing, machine learning (ML) techniques are more and more used to uncovered patterns in drug data for such purpose...
A new training scheme for neural-network-based controller for power electronics systems is proposed. It utilizes the circuit model of the power conversion stage (PCS) in the training process. The training algorithm is a distributed form of evolutionary computation, being able to run on a computer cluster equipped with multiple graphics processing units (GPUs). As a design example, a boost converter...
Matrix power repeaters (MPRs) have been used in high frequency radio systems for enhancing the signal propagation, as well as wireless power transfer systems for extending the power transfer range. However, their effect on the magnetic field distribution of inductive power transfer (IPT) systems is still not clear. This paper presents both the positive and negative effects of MPRs for enhancing or...
Interference alignment (IA) is a prospective method to manage interference between users in multi-user networks. On the other hand, jamming can be an effective way to combat adversarial eavesdropping for legitimate networks. In this paper, a beneficial jamming scheme is proposed for interference alignment networks. In the scheme, the jammer utilizes its precoding vector to constrain the jamming signal...
Here, an approach for synthesizing large-area and high-quality MoS2 flakes was developed. In addition, we made up the MoS2 photoelectric detector and studied the photocurrent response of the detector. We firstly used the ceramic pieces to control MoO3 evaporation for obtaining large-area MoS2. Our CVD reaction is hydrogen free, very simple operation, high repetition rate and cost saving. The obtained...
Feasibility of the novel utilization of a pressure switch mechanism for re-calibrating drifted implanted pressure sensors in-situ is demonstrated. We have designed and characterized the pressure response of a system, which can quantify the offset of a sensor after it has been implanted. The benchtop device is constructed of a 25 pm thick titanium diaphragm with 10 mm working diameter. An optimization...
We present Parsimony, a programming-by-example development environment for synthesizing lexers and parsers by example. Parsimony provides a graphical interface in which the user presents examples simply by selecting and labeling sample text in a text editor. An underlying synthesis engine then constructs syntactic rules to solve the system of constraints induced by the supplied examples. Parsimony...
In this paper, we consider how to achieve optimum throughput when LTE with listen before talk (LBT) shares the unlicensed spectrum with WiFi. Basically, we aim to address two problems: 1) How can WiFi access point (AP) and WiFi station (STN) configure the access parameters to maximize the throughput of their own networks when they have knowledge of the access parameter of LTE? 2) How to jointly tune...
A design of switched-inductor solar energy harvesting circuits for wireless microsensors is proposed. To track the maximum power point (MPP) for the photovoltaic (PV) array, a Boost harvester is designed. A Buck converter working in the discontinuous conduction mode (DCM) is utilized to provide the stable output voltage and improve efficiency.
A modified structure of operational transconductance amplifier (OTA) in CMOS 65-nm technology with signal-current enhancer and slew-rate (SR) helper is presented in this paper. The bias current is chosen to be lower than 0.1 μA to reduce the overdrive voltage requirement and thus make the amplifier survive under 0.7 V supply. An SR helper is also introduced to improve the transient performance. As...
A full-load low-dropout regulator (LDO) based on proposed hybrid compensation structure is proposed. The proposed LDO makes use of an NMOSFET power transistor. The LDO is able to be stabilized for 0 to 1-μF capacitive load. Experimental results prove the LDO stability and fast recovery speed.
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