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Frontiers in Optics, FiO 2005

作者： Akdemir, Kahraman D. King, Brian M. Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester MA United States

Integrating photonic crystals with MEMS/NEMS structures requires a high level of fabrication analysis in order to achieve the desired outcome. Consequently, the effects of various fabrication methods on device perform... 详细信息

ISBN: (纸本)1557527970

关键词： Photonic crystals

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MC-UWB precise positioning system - Field tests, results and effect of multipath

MC-UWB precise positioning system - Field tests, results and...

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18th International Technical Meeting of the Satellite Division of The institute of Navigation, ION GNSS 2005

作者： Parikh, Hemish K. James Duckworth, R. Michalson, William R. ION Electrical and Computer Engineering Department Worcester Polytechnic Institute Worcester Polytechnic Institute IEEE IEE BCS Engineering Council of the UK

An advanced precise position location and navigation system being developed for first responders and emergency rescuers is discussed in this paper. The paper will discuss details of the recent developments and the progress made in the design and development of a prototype wireless system which is very well suited for real-time positioning and tracking of first responders and emergency rescuers with a target of one meter accuracy in an indoor environment. The distance estimation is based on a time difference of arrival (TDOA) recovery approach and the Multicarrier-Ultrawideband (MC-UWB) signal structure being used is much easier to adapt to existing spectral assignments. The system level integration of the developed prototype receiver, transmitter and position location algorithms is described. The paper will present distance estimation results outdoors, and indoors, in the presence of multipath. Future design issues and improvements to the system to improve the position estimates will be reviewed.

关键词： Navigation systems

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PFAS Incineration: Known Unknowns, Reaction Simulation, and ML to Predict Product Properties

PFAS Incineration: Known Unknowns, Reaction Simulation, and ...

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2023 IEEE MIT Undergraduate Research Technology Conference, URTC 2023

作者： Soiffer, Duncan Pyorre, Tuomas Kenney, David Teixeira, Andrew Worcester Polytechnic Institute Department of Computer Science and Mathematical Sciences WorcesterMA United States Worcester Polytechnic Institute Department of Robotics Engineering WorcesterMA United States Worcester Polytechnic Institute Department of Chemical Engineering WorcesterMA United States

ISBN: (纸本)9798350308600

Per- and polyfluoroalkyl substances (PFAS) are a group of chemicals used for their impressive stability, a property which has also led them to be found polluting virtually every sector of the environment-including our own bodies. Presently, our ability to destroy PFAS is limited largely to incineration, whose products and side effects are poorly understood. Research on PFAS incineration is constrained by high experimental costs and difficulty in accurately measuring reaction products. This presents an opportunity for computer simulation and machine learning to provide valuable assistance. In this study, three kinds of thermal PFAS decomposition are simulated. Further, to broaden physical understanding of PFAS incineration products, a recent in-house machine learning model for predicting the octanol-water partition coefficient (LogP) of chemicals is improved and applied to simulation results. A decrease in LogP is observed in all treatments, with the most dramatic effect (-2 average LogP) observed in oxidative pyrolysis. © 2023 IEEE.

关键词： Machine learning

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An Automatic Assessment System of Diabetic Foot Ulcers Based on Wound Area Determination, Color Segmentation, and Healing Score Evaluation

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Journal of Diabetes Science and Technology 2016年第2期10卷 421-428页

作者： Wang, Lei Pedersen, Peder C. Strong, Diane M. Tulu, Bengisu Agu, Emmanuel Ignotz, Ron He, Qian Electrical and Computer Engineering Department Worcester Polytechnic Institute 100 Institute Rd Worcester 01609 MA United States School of Business Worcester Polytechnic Institute Worcester MA United States Computer Science Department Worcester Polytechnic Institute Worcester MA United States Plastic Surgery Department UMASS Medical School Worcester MA United States

Background: For individuals with type 2 diabetes, foot ulcers represent a significant health issue. The aim of this study is to design and evaluate a wound assessment system to help wound clinics assess patients with foot ulcers in a way that complements their current visual examination and manual measurements of their foot ulcers. Methods: The physical components of the system consist of an image capture box, a smartphone for wound image capture and a laptop for analyzing the wound image. The wound image assessment algorithms calculate the overall wound area, color segmented wound areas, and a healing score, to provide a quantitative assessment of the wound healing status both for a single wound image and comparisons of subsequent images to an initial wound image. Results: The system was evaluated by assessing foot ulcers for 12 patients in the Wound Clinic at University of Massachusetts Medical School. As performance measures, the Matthews correlation coefficient (MCC) value for the wound area determination algorithm tested on 32 foot ulcer images was.68. The clinical validity of our healing score algorithm relative to the experienced clinicians was measured by Krippendorff's alpha coefficient (KAC) and ranged from.42 to.81. Conclusion: Our system provides a promising real-time method for wound assessment based on image analysis. Clinical comparisons indicate that the optimized mean-shift-based algorithm is well suited for wound area determination. Clinical evaluation of our healing score algorithm shows its potential to provide clinicians with a quantitative method for evaluating wound healing status. © 2015 Diabetes Technology Society.

关键词： clinical validation of wound assessment diabetic foot ulcer healing score tele-medicine wound image analysis

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Effects of Interference on Beamforming-Enabled Vehicular Networks in Multipath Propagation Environments 91

Effects of Interference on Beamforming-Enabled Vehicular Net...

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91st IEEE Vehicular Technology Conference, VTC Spring 2020

作者： Kanthasamy, Nivetha Wyglinski, Alexander M. Cowlagi, Raghvendra Worcester Polytechnic Institute Department of Electrical and Computer Engineering WorcesterMA United States

ISBN: (纸本)9781728152073

This paper characterizes the impact of interference on vehicular communications employing beamforming links between transmitters and receivers operating within a multipath propagation environment. Different road scenarios, such as an intersection and a roundabout are considered to determine the performance characteristics of the vehicle communication link. By employing the results for different antenna array elements and by varying distance, we analyse the bit error rate (BER) of vehicles operating in multipath propagation environments with an interferer within the vicinity of an communication link. © 2020 IEEE.

关键词： Multipath propagation

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A GPU accelerated virtual scanning confocal microscope

A GPU accelerated virtual scanning confocal microscope

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2014 IEEE High Performance Extreme Computing Conference, HPEC 2014

作者： Kingsley, James Chen, Zhilu Bibeau, Jeffrey Vidali, Luis Huang, Xinming Tuzel, Erkan Department of Physics Worcester Polytechnic Institute United States Department of Electrical and Computer Engineering Worcester Polytechnic Institute United States Department of Biology and Biotechnology Worcester Polytechnic Institute United States

ISBN: (纸本)9781479962334

Fluorescence Recovery After Photobleaching (FRAP) is a commonly used technique for quantifying the movement of small biological systems. To aid in the evaluation of experimentally produced data, we used the parallel processing power offered by Graphics Processing Units (GPUs) to accelerate a computational simulation of the process. We find that the parallel process is significantly faster when implemented on the GPU, and that further speed increases can be accomplished via various optimizations, bringing the speed increase up to a factor of one hundred in some cases. © 2014 IEEE.

关键词： Graphics processing unit

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Windows streaming media performance analysis on a IEEE 802.11g residential network

Windows streaming media performance analysis on a IEEE 802.1...

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7th IASTED International Conferences on Wireless and Optical Communications, WOC 2007

作者： Grant, Travis Gupta, Saurabh Pandya, Harshal Kinicki, Robert Computer Science Department Worcester Polytechnic Institute Worcester MA 01609 United States Electrical and Computer Engineering Department Worcester Polytechnic Institute 100 Institute Road Worcester MA 01609 United States

ISBN: (纸本)9780889866591

This paper presents a performance evaluation of Microsoft Windows Media Streaming (WMS) on an IEEE 802.11g home network. Empirical measurements are used to determine the viability of streaming High Definition (HD) and high quality video over a wireless residential network using currently available multimedia streaming software. User experience is evaluated using visual testbed observations and performance criteria that include playback time, transmission data rate, playout buffer fill percentages and wireless frame losses. While the experiments show that 8.1 Mbps HD content is not currently playable with acceptable quality using a WMS server over a wireless LAN (WLAN), this investigation demonstrates that WMS services can provide high quality streaming services over a residential WLAN.

关键词： Media streaming

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Experimental Test-Bed for Bumblebee-Inspired Channel Selection in an Ad-Hoc Network 88

Experimental Test-Bed for Bumblebee-Inspired Channel Selecti...

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88th IEEE Vehicular Technology Conference, VTC-Fall 2018

作者： Gill, Kuldeep S. McClintick, Kyle Kanthasamy, Nivetha Tolbert, Jefferey Nguyen, Duong Nguyen, Son Wernsing, Galahad Moore, Valerie Gelman, Ian O'Neil, Alexander Schubert, Nicholas Coogan, Corey Murdy, Krysta Mahan, Brian Halama, Sylvester Heath, Kevin N. Ryder, Elizabeth F. Gegear, Robert J. Wyglinski, Alexander M. Department of Electrical and Computer Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Biology Biotechnology Worcester Polytechnic Institute WorcesterMA United States

ISBN: (纸本)9781538663585

In this paper, we design a test-bed for a bumblebee inspired channel selection algorithm employed on a wireless ad-hoc network. Vehicles in connected ad-hoc networks are routinely challenged with the complex decision-making problem of either staying with the same channel or moving to a different channel under highly time-varying channel quality conditions. In order to enable vehicles to adapt to these time-varying channel conditions, we designed a bumblebee-inspired decision-making algorithm. The proposed algorithm uses temporal channel quality information for optimal channel selection. Channel energy values are used for making switching decisions by taking switching costs into consideration. We implemented a test-bed inside a controlled laboratory environment using ADALM-Pluto Software-defined radios (SDRs) to evaluate the proposed approach. The test-bed can be configured to emulate a vehicular network environment. Furthermore, in this work we show the novelty of our bumblebee algorithm for optimal channel selection in a steady environment. We compared the performance of our Bumblebee algorithm with a random channel selection algorithm, and noticed an increase of 158.33% in the throughput of the network with our algorithm. © 2018 IEEE.

关键词： Decision making

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Bumblebee-Inspired C-V2X Dynamic Spectrum Access Testbed Using OpenAirInterface 91

Bumblebee-Inspired C-V2X Dynamic Spectrum Access Testbed Usi...

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91st IEEE Vehicular Technology Conference, VTC Spring 2020

作者： Gill, Kuldeep S. Heath, Kevin N. Chuke, Sreeshti Haider, Aneela Gegear, Robert J. Ryder, Elizabeth F. Wyglinski, Alexander M. Worcester Polytechnic Institute Department of Electrical and Computer Engineering WorcesterMA United States Worcester Polytechnic Institute Department of Biology Biotechnology WorcesterMA United States

ISBN: (纸本)9781728152073

Cellular Vehicle-to-everything (C-V2X) was introduced by 3GPP in Release 14, which supports direct vehicle-to-vehicle (V2V) communication using sidelink channels. There are two modes in C-V2X for supporting V2V communication: Mode 3 and Mode 4. Both modes support V2V communications but differ on their spectrum allocation methodology. In out-of-coverage scenario defined under Mode 4, vehicles reserve spectrum resources using semi-persistent scheduling to enable direct communication. Currently, Intelligent Transportation System (ITS) spectrum at 5.9 GHz is emerging as an immediate resource to facilitate vehicular communication which has already been assigned for IEEE 802.11p. However, these dedicated channels will not be sufficient to support the connected vehicles in densely populated cities. Leveraging the existing underutilized wireless spectrum elsewhere, such as in digital television spectrum band is a likely solution. An intelligent scheme is required which can make adaptive decisions based on channel environment to efficiently use the secondary spectrum. Bumblebee behavioral model possess evolved decision-making mechanisms to adaptively solve similar problems while foraging in environments containing multiple floral resources (channels). Simulation results using bumblebee-based algorithm have shown that a memory system based on the averaging of stored channel energy information dramatically increased VDSA performance over a memoryless system in both urban and highway scenarios by 52% and 20%, respectively. In this paper, we propose a vehicular dynamic spectrum access (VDSA) solution based on bumblebee behavioral model for C-V2X and evaluate its performance using OpenAirInterface (OAI) LTE-Sidelink platform. © 2020 IEEE.

关键词： Vehicle to Everything

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A robotics engineering M.S. degree

A robotics engineering M.S. degree

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2010 ASEE Annual Conference and Exposition

作者： Gennert, Michael Michalson, William Demetriou, Michael Computer Science Department Robotics Engineering Program Worcester Polytechnic Institute United States Worcester Polytechnic Institute United States

There is an increasing demand for creative scientific, engineering, and management talent to meet national needs. We believe that the best way to educate professionals for leadership roles is in a unified multi-disciplinary curriculum. This paper describes one such program, a Master of Science degree in Robotics engineering at worcester polytechnic institute, whose goal is to prepare men and women for technical leadership in the robotics industry and research in robotics. The program, launched in fall 2009, develops competence in electro-mechanical-computational systems and an awareness of management systems. It constitutes a multi-disciplinary effort by faculty in Arts & Sciences (Mathematics and computer Science), engineering (Electrical & computer engineering and Mechanical engineering), and Management. The program is organized around a technical coursework core with select science and engineering electives. Technical strength is supplemented by organizational and management principles embodied in context courses in Systems engineering and Management. The program culminates in individual capstone projects that take the form of a thesis, directed research, or practicum with written report. In all cases, a public oral presentation is required. A B.S./M.S. option allows the program to be completed in a single additional year of work past the Bachelor's degree. By using existing courses where appropriate, we were able to start the program by developing only two new courses, Foundations of Robotics and Robot Dynamics, supplemented by special topics, independent study, and other project work. We anticipate adding new courses as the program grows, additional faculty join the program, and as we introduce a Ph.D. in Robotics engineering. Initial response to the program by students and industry has been very positive, and the program shows great promise to contribute significantly to meeting future engineering workforce needs. © American Society for engineering Education,

关键词： Curricula

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