Attempt TCP ACK-Storm Based Virtual Network Attacks and Defence Solutions

The rapid development of the digital age has been pushing people to access a mobile working environment when handsets are becoming more diverse and convenient with the help of Virtualization Technology. The speed and usability of Virtualization Technology are astounding for saving initial investment costs and optimizing IT infrastructure. Such Virtualization Technology is what businesses are interested in and makes the virtual server market growing strongly, especially for businesses that have many branches. However, virtual systems (hypervisors) are more vulnerable than traditional servers according due to many network attacks from curious users. Therefore, it's necessary to prepare for the worst circumstances, understand clearly, and research for new threats that can break down the virtual system. In this paper, we attempt to demonstrate the TCP ACK storm based DoS (Denial of Service) attack on virtual and Docker networks to show the threats that easily are happen on services deploying on virtual networks. Based on such consequence, we propose some solutions to prevent our virtual system from potential risks.

The Power of Limit

This project analyses the field of current geographic political partitions offering an interdisciplinary evaluation able to describe the space in the borders as ‘narrative beginning’, as ‘contact infrastructure’ that crosses territories where inhabitants are neither citizens nor refugees but only ‘border people’. At the end, cognitive horizons able to breach the Wall, going beyond the political-territorial divisions which have always existed in a world which is a sort of more or less fortified bulwark able to suggest ‘border worlds’ that are ‘city’, ‘border land’. We observe a porous border with a rhizomatic trend that reformulates a synergistic relationship between the individual and the territory in an antinomic game of actions and reactions. Appears an idea of multiplicity in which the ‘rhizome-like’ structure becomes decentralized configurations where each part can be connected to another without go through specific points, as the infrastructure network or even the virtual system of global contacts. So, the space in the borders results in a new map of the delocalized space that increasingly requires of a design thinking that, on the basis of critiques of data, variables and statistics, sometimes becomes ‘hard’ and sometimes ‘elastic’, sometimes ‘insurmountable’ and sometimes ‘flexible’ and that finds an answer in the connivance between opposites and in the territorial synergy.

Use of Virtual Reality in Teaching Fractions at Elementary Level

The learning difficulties of the mathematical concept of fraction is a topic that has been studied by different mathematical educators, but still is a relevant topic today, because despite the proposals that have been made to improve learning, they have not been used for all teachers besides those few that are involved in the use of the technology. Besides that there is little educational software that is based on research and is validated to be taken to the classroom. This article shows a virtual system that has been created for the student to interact with it in order to connect his knowledge with his play skills, skills of discovery, reasoning, communication among others and may have a significant learning of fraction

Application in Virtual System Modelling (VSM) of Sensored Pm BLDC Motor Drive Using Two Technologies of Processors PIC16F877Aand Arduino Uno R3

This paper presents the simulation of a 3-phase Permanent Magnet Brushless DC (PM BLDC) motor drive. For the studied drive system in this paper, pulse width modulation (PWM) control has been implemented for a 60-degree six-step trapezoidal PM BLDC motor drive. The used processor is Arduino and PIC16F877A, which is a common, flash-able, and low-cost microcontroller unit (MCU) with functions to perform commutation sequence, rotating direction control, speed control and reading Hall sensor signals, and calculating RPM and duty cycle of the PWM outputs signals depending on variable speed. The controlling technique uses sensored type in order to make this design suitable for low-speed and high-speed applications plus control simplicity. In this paper, The application of Proteus Virtual System Modelling (VSM) software as a real-time simulation tool is introduced to model the performance of a 3-phase Permanent Magnet Brushless DC motor drive before hardware implementation. Expected results can be monitored and analyzed throughout the virtual simulation of all components. The usage of Proteus VSM enables shorter product development time, thus reducing development costs for industrial applications.

A Mini Review of Presence and Immersion in Virtual Reality

Virtual reality technology is constantly improving such that a virtual environment is more like a physical one. However, some research evidence suggest that certain virtual reality scenarios are less real than others to human observers (e.g., experience of falling from a high place) leading to potential limitations of using virtual reality as a research tool for certain tasks. Moreover, since the inception of VR research the terms presence and immersion have been somewhat convoluted and at times, even used interchangeably. Using a thematic content analysis based on seventeen articles, a theme for each term emerged. Presence is an experiential quality in virtual environments and immersion is associated with the technical aspects of a virtual system that aide the user in feeling a sense of presence. Several new technologies, as well as more traditional approaches are discussed as potential methods to improve of immersion, and therefore presence, in virtual reality.

Optimal Preview Controller for Linear Discrete-Time Systems: A Virtual System Method

In this paper, a new method for the design of the preview controller for a class of discrete-time systems is proposed based on the virtual system. Firstly, by taking the known future reference signal as the output, the virtual system with similar structures to the controlled system is constructed. Then, the augmented error system is received by translating the controlled system to it and by integrating the error equation. Thus, the tracking problem of the controlled system is transformed into the regulation problem of the augmented error system. Secondly, in view of the minimum principle, the optimal controller of the augmented error system is acquired, and the preview controller of the controlled system is also gained. Further, by discussing the stabilizability and detectability of the augmented error system, the conditions for the existence of the unique positive semidefinite solution to an algebraic Riccati equation are obtained. By using the method in this paper, making difference and dimension expansion for the state equation in designing the augmented error system is avoided and the output can track the reference signals better. Finally, the numerical simulation shows the effectiveness of the proposed controller.

AutoShare: Virtual community solar and storage for energy sharing

Residential solar installations are becoming increasingly popular among homeowners. However, renters and homeowners living in shared buildings cannot go solar as they do not own the shared spaces. Community-owned solar arrays and energy storage have emerged as a solution, which enables ownership even when they do not own the property or roof. However, such community-owned systems do not allow individuals to control their share for optimizing a home’s electricity bill. To overcome this limitation, inspired by the concept of virtualization in operating systems, we propose virtual community-owned solar and storage—a logical abstraction to allow individuals to independently control their share of the system. We argue that such individual control can benefit all owners and reduce their reliance on grid power. We present mechanisms and algorithms to provide a virtual solar and battery abstraction to users and understand their cost benefits. In doing so, our comparison with a traditional community-owned system shows that our AutoShare approach can achieve the same global savings of 43% while providing independent control of the virtual system. Further, we show that independent energy sharing through virtualization provides an additional 8% increase in savings to individual owners.

Adaptive Virtual Reality Design Methodology

The article provides an integrated analysis of practical application of virtual reality (VR) in healthcare. Modern VR products have been created for the diagnosis and treatment of post-traumatic syndrome, Alzheimer's disease, alcohol dependence, phobic disorders, and teenage depression. Information on such products is limited to simple scenes, without adaptation to the user. The article shows a prospect for creating a virtual system with biological feedback. The proposed system is a set of portable and stationary devices for recording physiological signals and immersion into a virtual reality environment, as well as smart nodes for registration, processing, and decision-making to correct the user's mental state. Technologies for wire/wireless transfer of audio-visual and parametric information in virtual reality systems are discussed. The analyses include the features (advantages and disadvantages) of using virtual reality in conditions of optical information transfer, wireless protocols, and wire interfaces that provide user communication with virtual reality system and technical solutions.