Florida Polytechnic University

About: Florida Polytechnic University is a education organization based out in Lakeland, Florida, United States. It is known for research contribution in the topics: Computer science & Catalysis. The organization has 302 authors who have published 538 publications receiving 6549 citations. The organization is also known as: Florida Poly.

Detection and Mitigation of Cyberattacks Against Power Measurement Channels Using LSTM Neural Networks

Abstract: In this paper a long short-term memory (LSTM) neural network (NN) is used to detect cyberattacks against power measurement channels. The detection scheme can also mitigate the attack damaging effect on the operation of the receiving energy management system. This can secure more time to finalize the detection decision, which can potentially reduce the false positive detection rate. LSTM NNs have the ability to learn the temporal behavior of a time series through correlating the distinct features in the measurement time series, i.e. the input sequence. The output of the proposed LSTM NN scheme is used to adjust the input sequence in real-time to neutralize the corrupted measurements, while allowing the detection algorithm to continue to examine the next incoming measurements. Hence, the receiving energy management system only sees the corrected signal, which improves the system performance. In contrast to other techniques in the literature that mainly exploit the spatial correlation between the measurement channels, a single series measurement channel is used to examine the LSTM NN detection capability using only the temporal features of the measurement series. Unlike most of the techniques in the literature, this technique does not need labeled data during training. The detection scheme is simulated in the MATLAB software package and tested using five different attack patterns.

Autonomic Cross-Layer Management of Cloud Systems

Abstract: The current management techniques of large scale cloud systems are inefficient, and lead to high operational costs. In this paper, we present a cross-layer management framework that overcomes the current IT management challenges of cloud systems and their applications. The proposed framework monitors and performs holistic analysis of the cloud system resource utilization from the physical layer, the hypervisor layer, and the virtual machine (VM) layer. For a given set of constraints (such as low power, cost minimization, etc.), policies are generated based on the Service Level Agreements (SLAs) that will be maintained at runtime by our cross-layer management system. We have evaluated our framework using a bidding application on a private cloud system. By autonomously scaling up/down the VM resources at runtime, the cross-layer management framework can effectively improve resource utilization and reduce the operational costs.

Design of Notched Turbine Energy Harvesting System

Abstract: This research presents the design, simulations and test of a new miniature power generator. The research incorporates a new turbine model, which includes notched blades, and a special turbine casing, designed to work in immersed micro flow fluid systems. In addition, an electromagnetic system is attached inside of the turbine, to finally convert the variable magnetic field to electricity, which is produced from permanent magnets (attached on a rotor) that rotate and induce currents into coils that are fixed inside the turbine casing. The shape and number of components of this miniature-generator system allows adaptability and flexibility to a variety of applications which require power. Also, the simplicity in the design and the use of commercial parts reduces cost and make it very suitable for small power development. The broad challenge being addressed is energy generation using a battery-free system capable of being used in bio/medical, environmental, aquatic/marine, and many other applications where micro-fluidic systems are present. The knowledge of this research is aimed at applications such as self-powered micro and nano-devices, rechargeable micro batteries, or an integrated power supply for artificial organs, valves, sensors, micro motors, home appliances, and micro robots.

Environmental Nanotechnology: Its Applications, Effects and Management

Abstract: Environmental nanotechnology is holding an immense position in modern days’ science and engineering. These advanced ‘nanomaterials’ are being utilized for diverse range of applications but with the ideology of saving environment. Environmental sector is being tackled with the aim of developing sensors for detecting, monitoring and analysing the toxic contaminants so as to protect and remediate environment. In the presented chapter we have tried to illustrate applications of nanofields, and resulting impacts on the four spheres of the earth. Many efforts are being taken to have a check on the negative impacts of the nanotechnology but still there are many prevailing discrepancies that need to be confronted.

Linearity and Nonlinearity in Hollow-Core Antiresonant Fiber Sensors in the Terahertz Regime

Abstract: In nonlinear optics, a major challenge is to maximize the interaction between the light from laser sources and low-density media such as gases. An ultrafast laser beam can be focused to form a highly intense spot over a small concentrated area. The ultrafast laser beam has a short pulse width of less than one picosecond and high peak power in the beam profile (Fig. 1). The beam profile of the laser source describes the energy density and distribution of light, and the beam profile of a laser source is usually affected during the propagation and collimation of the beam. An efficient nonlinear optical sensor also requires high peak power at low energy (low average power) over short duration of laser pulse, a high beam profile and long interaction length. These requirements of a nonlinear optical sensor with low attenuation constant can be achieved in hollow-core photonic crystal fiber (HC-PCF). Gas-filled HC-PCF exhibits optical nonlinearity for an ultrashort temporal and spectral broadening of NIR pulses [1], [2]. The nonlinearity in HC-PCF can be achieved by tuning the gas pressure. Gas-filled HC-PCF nonlinear media are low-cost, replenishable, reconfigurable and exhibit sharp spectral lines [3]. Linear and nonlinear responses are also found in other types of optical fibers.