5153 research outputs found
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Fortified Anonymous Communication Protocol for Location Privacy in WSN: A Modular Approach
No full textWireless sensor network (WSN) consists of many hosts called sensors. These sensors can sense a phenomenon (motion, temperature, humidity, average, max, min, etc.) and represent what they sense in a form of data. There are many applications for WSNs including object tracking and monitoring where in most of the cases these objects need protection. In these applications, data privacy itself might not be as important as the privacy of source location. In addition to the source location privacy, sink location privacy should also be provided. Providing an efficient end-to-end privacy solution would be a challenging task to achieve due to the open nature of the WSN. The key schemes needed for end-to-end location privacy are anonymity, observability, capture likelihood, and safety period. We extend this work to allow for countermeasures against multi-local and global adversaries. We present a network model protected against a sophisticated threat model: passive /active and local/multi-local/global attacks. This work provides a solution for end-to-end anonymity and location privacy as well. We will introduce a framework called fortified anonymous communication (FAC) protocol for WSN.http://dx.doi.org/10.3390/s15030582
Real-Time QoS Routing Protocols in Wireless Multimedia Sensor Networks: Study and Analysis
No full textMany routing protocols have been proposed for wireless sensor networks. These routing protocols are almost always based on energy efficiency. However, recent advances in complementary metal-oxide semiconductor (CMOS) cameras and small microphones have led to the development of Wireless Multimedia Sensor Networks (WMSN) as a class of wireless sensor networks which pose additional challenges. The transmission of imaging and video data needs routing protocols with both energy efficiency and Quality of Service (QoS) characteristics in order to guarantee the efficient use of the sensor nodes and effective access to the collected data. Also, with integration of real time applications in Wireless Senor Networks (WSNs), the use of QoS routing protocols is not only becoming a significant topic, but is also gaining the attention of researchers. In designing an efficient QoS routing protocol, the reliability and guarantee of end-to-end delay are critical events while conserving energy. Thus, considerable research has been focused on designing energy efficient and robust QoS routing protocols. In this paper, we present a state of the art research work based on real-time QoS routing protocols for WMSNs that have already been proposed. This paper categorizes the real-time QoS routing protocols into probabilistic and deterministic protocols. In addition, both categories are classified into soft and hard real time protocols by highlighting the QoS issues including the limitations and features of each protocol. Furthermore, we have compared the performance of mobility-aware query based real-time QoS routing protocols from each category using Network Simulator-2 (NS2). This paper also focuses on the design challenges and future research directions as well as highlights the characteristics of each QoS routing protocol.https://doi.org/10.3390/s15092220
A Portable Real-Time Noninvasive Skin Lesion Analysis System to Assist in the Melanoma Prevetion and Early Detection
No full textThe author wished this thesis only accessible to current students and faculty, so we cannot provide it open access.Melanoma spreads through metastasis, and therefore it has been proved to be very fatal. Statistical evidence has pointed out that the majority of deaths resulting from skin cancer are as a result of melanoma. Further investigations have shown that the survival rates in patients depend on the stage of the infection. In other words, early detection and intervention of melanoma implicates higher chances of curing the disease. Clinical diagnosis and prognosis of melanoma is a challenging task since the processes are prone to misdiagnosis and inaccuracies due to doctors' subjectivity. It's important to note that one in five Americans will develop skin cancer in their lifetime, and on average, one American dies from skin cancer every hour. A system to prevent this type of skin cancer is being awaited and is highly in-demand. It is important to highlight that excess exposure to radiations from the sun gradually erode melanin in the skin. Moreover, such radiations penetrate into the skin thereby destroying the melanocyte cells. Melanomas are asymmetrical and have irregular borders, notched edges, and color variations, so analyzing the shape, color, and texture of the skin lesion is important for melanoma early detection and prevention. In this work, the components of a portable real-time noninvasive skin lesion analysis system to assist in the melanoma prevention and early detection are proposed. The first component is a real-time alert to help users to prevent skin burn caused by sunlight; a novel equation to compute the time for skin to burn is thereby introduced. The second component is an automated image analysis including image acquisition, hair detection and exclusion, lesion segmentation, feature extraction, and classification. The framework has been developed in a smart-phone application. The experimental results show that the proposed system is efficient, achieving high classification accuracies
Bigger Is Always Better, What About Heavier? Analysis On Heavier Cars Creating Opportunities and Benefits
No full textShon Phillip's poster discussing the benefits of larger cars vs. smaller cars
Emulating the Functionality of Rodents’ Neurobiological Navigation and Spatial Cognition Cells in a Mobile Robot
Get PDFA unique roving robot navigational system is presented here, which is inspired by the rat’s navigational and spatial awareness brain cells. The rat, as well as all mammalians, are capable of exploring their surroundings when foraging or avoiding predators, and remembering their way home or to the closest known shelter. The robot built in this study, named ratbot, uses characteristics and interpreted functionalities of the specialized navigational and spatial cognition brain cells, which are primarily found in the hippocampus and entorhinal cortex. These cells are the: place cells, head direction cells, boundary cells, and grid cells, as well as memory used for the storage and access of salient distal cues. To navigate from one waypoint to another, the ratbot uses inspiration from place cells and head direction cells, known as path integration. This is accomplished through use of vectors and vector mathematics. Additionally, the ratbot uses a field programmable gate array (FPGA) to emulate grid cell inspired functionality for environment mapping and spatial cognition
Design and Simulation of aMEMS Thermal Actuated Micropump
No full textIn recently years, micromachining technology and biomedical are integrating with each other has provided us great convenient on many applications such as gene chip, drug delivery, nucleic acid synthesis etc. How to efficient and rapid transportation of microfluids has been a challenging for biomedical technology; follow by the rapid development of Micro-Electro-Mechanical – Systems and biomedical engineering. . United States of America has become one of the most potential technologies due to the demand of the medical examination and test increase step by step. But In nowadays, some of countries still used large traditional machine for medical tests, it may be a hindrance for obtain bio-information. If BioMEMS technology used more widely, have very positive consequences as a whole. And less required sample for diagnostics, as well as lower reagents costs. Faster response times and process control due to short diffusion distances. It also can be safer platform for biological studies because of integration of functionality, smaller fluid volumes and energies. Another advantage is that lower fabrication costs, easier mass production and allowing cheap disposable chips. Thus, develop low costs devices with stable performance and portability and was able to meet the need of medical detection is the most urgent task. How fast and effective delivery fluid can be challenging in MEMS technology. Many research of micropump micropump have been published one after another. Such like Electro osmotic micropumps, piezoelectric micropumps, Pneumatic micropumps, Magnetic micropumps…etc. Pneumatic is the one of surest and quickest method. In this poster, the design and simulation of a MEMS thermal actuated micropump is reported. The micropump consists of a microfludic chamber on top of a thermal actuation chamber. The PDMS (Polydimethysioxane) membranes are activated pneumatically by air pressure which generates a rapid transporting of microfluids to target. The working principle of the micropump is analyzed in detail. Based on the theoretical analysis, a set of optimized design parameters of the micropump are suggested. Simulation is used to verify the function of the micropump. Compared to traditional methods, this MEMS thermal actuated micropump has some advantages, like low costs, more easy mass production. If integrate with testing chip...etc. It could provide a useful tool for biomedical field and be crucial for micro total analysis system. Bio-chip is kinds of modern high-tech chip. It integrate laboratory’s functions on miniature chip that usually made by silicon chips and glass. It can be divided into two groups. That are “lab on a chip” and” Micro array”. Microfluidics technology is a very important part of bio-chip. In micro scale, surface area volume ratio and forces within the Atom increase because tiny size and geometry. In this situation, fluid resistances also increase in micro channel. Thus, driving force is necessary for fluid acting in micro channel. It is one of the motivations. Another goal is formulate a micro pump that has the advantages of convenient arrangement and usage, time saving, and material saving; in order to reduce the cost and consider the possibility of disposable chip. This paper used the Polydimethylsiloxane for basic materials. They have some advantages like high biocompatibility, high light transmission and producing simple
Choices, Expectations, and Experiences of UB International Students
No full textThis study examines the choices, expectations, and experiences of the international students who currently study at the University of Bridgeport. The paper can serve as the background for future research and may provide some references to improve internationalization at the University of Bridgeport. The research also intends to examine the role of policies and regional socio-economy in international student mobility from the perspective of UB and to have an in-depth understanding on the sheer trend of international students mobility
Real Projects, Virtual Worlds Coworkers, Their Avatars and the Trust Conundrum
No full textThis qualitative study informs project managers of the impact that the authentic projection of coworker identity via avatars has on trust and potential project management success when teams use virtual worlds to collaborate. By exploring the common experiences and reactions of potential virtual team participants to a demonstration that showed how to customize avatars and use them to communicate with others, it facilitated the development of a grounded theory that confirms whether the projection of authenticity via avatars is an antecedent of team trust and real project management success. Real management success was the main objective, since it is vital for the enterprise to use all means possible for competitive advantage in an ever-expanding technological society
I have my MBA – Now What?
No full textAlthough it is assumed that gaining an advanced degree should make a student more attractive to a potential employer little current data is available on the value that employers may place on such credentials. The UB Business School graduate population is an equal mix of domestic and international students. Historically it has been assumed that the international student wants to return to his or her native country. The goal of this research will be to inform the faculty at the Business School as to the employment objectives of international MBA students
