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In the transportation systems engineering field, there is a fast growing interest to use small unmanned aerial systems (UAS) for structural inspections. An application of particular importance is the inspection of bridges and high mast luminaires (HML). This paper describes an ongoing research effort- and results obtained — to evaluate small unmanned aerial vehicles (sUAV) for various environmental...
The inspection of high mast luminaire (HML) structures depends heavily on visual assessments from experienced field inspectors. State agencies rely on these visual inspections to make key decisions about the health of structures-such as allocation of human resources and funds to maintain\repair structures — that significantly affect public safety and costs. This paper describes an ongoing research...
In this paper, we study a networked control system with similar linear time-invariant plants. Using the master stability function method. We propose a network optimization method to minimize the feedback network order in the sense of the Frobenius norm. Then we verify our results with a numerical example. Additionally, we show that this method outperforms the known feedback network optimization methods...
Traditional systems engineering methods and theories are not sufficient for analyzing and explaining the dynamics of the resource allocation for Systems of Systems (SoS) with autonomous parts. This paper introduces a framework, using complex network models, for studying the interaction of autonomous components and the design of the system connectivity structure in SoS as well as their impact on resource...
In this paper, we implement an application-aware scheduler that differentiates users running real-time applications and delay-tolerant applications while allocating resources. This approach ensures that the priority is given to real-time applications over delay-tolerant applications. In our system model, we include realistic channel effects of Long Term Evolution (LTE) system. Our application-aware...
The following case study describes how a series of operational concept demonstrations provided significant benefits for the OCX program and how the lessons learned from that experience can be applied to other large, complex programs with multiple stakeholders.
Brain-machine interface (BMI) systems collect and classify electroencephalogram (EEG) data to predict the desired command of the user. The P300 EEG signal is passively produced when a user observes or hears a desired stimulus. The P300 can be used with a visual display to allow a BMI user to select commands from an array of selections. The visual stimuli are often repeated and averaged to increase...
Predicting mortality of Middle East respiratory syndrome (MERS) patients with identified outcomes is a core goal for hospitals in deciding whether a new patient should be hospitalized or not in the presence of limited resources of the hospitals. We present an oversampling approach that we call Greedy-Based Oversampling Approach (GBOA). We evaluate our approach and compare it against the standard oversampling...
Tire road noise is considered as the major noise source in traffic noise and as a health problem today. Existing methods to measure the tire road noise suffer from several disadvantages which led to the development of an alternative method, namely the tire cavity sound measurement method. Due to the high costs of existing prototypes, this method is not applicable for field operational tests and to...
In this paper we introduce a novel approach to study emerging organizational relations and coordination structures in crisis response operations. We use dynamic modeling methods to analyze operations in conjunction with network analysis to study relationships among coordinating teams. The goal of the research is to produce a model describing evolution of crisis response operation as network based...
Governance is one of the key differentiating elements between traditional systems and systems of systems. While systems are governed by a single authority, systems within a system of systems are often independently governed or governed by fully empowered entities. Such independence is a necessary condition for the autonomy of each constituent system and for enabling the concept of belonging. At the...
Monte Carlo simulation is a practical and flexible method in power system risk assessment. However, when assessing a large system, the Monte Carlo simulation needs more time for convergence. High accuracy of risk indices demands large-scale sampling calculations and lots of time. This paper proposes a new acceleration algorithm based on scattered sampling and heuristic local load shedding while guaranteeing...
This paper addressed two main challenges in trace detection: a) dimensionality disparity, i.e., the unfavorable ratio between the high dimensionality of the hyperspectral cube and the small size of the training data set, and b) mixed spectral signatures, i.e., the presence of several material substances embedded in one single pixel due to an insufficient resolution. Under these circumstances, traditional...
In this paper an RFID-based localization algorithm for Internet of Things (IoT) is proposed. The responses of RFID tags to different readers are employed to determine the location of the IoT devices. The proposed algorithm does not rely on the on the unreliable power level reading and the sophisticated direction-of-arrival-based methods. First, we assume that the location of the RFID readers are known...
Objective: To develop an Airport SMS tool which could effectively support the work flow of airport safety management. Methods: The tool was developed based on B/S structure, and mobile application and smart device were also adopted for its accessibility. At the same time, both internet and mobile network were used in this tool, and multimedia technology, e.g. images, videos and geographic information...
Orthogonal frequency division multiplexing (OFDM) systems require orthogonality among subcarriers. Unfortunately, the conditions, such as, residual carrier frequency offset, time variations because of Doppler shift or phase noise, which thus destroys the orthogonality at the receiver, hence results in intercarrier interference (ICI) and degrades the bit error rate (BER) performance. In this paper,...
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