Vaughn College of Aeronautics and Technology

About: Vaughn College of Aeronautics and Technology is a education organization based out in New York, New York, United States. It is known for research contribution in the topics: Gravitational microlensing & Planetary system. The organization has 727 authors who have published 708 publications receiving 14082 citations. The organization is also known as: College of Aeronautics.

Finite Difference Impulsive Response Analysis of a Frame Structure – A MATLAB Computational Project- Based Learning

Abstract: The aim is to implement a computational project-based learning methodology in engineering courses that can contribute to learning improvement and ultimately to educational success in engineering and engineering technology programs. This learning methodology is based on both computational and programming process that can enhance student’s mathematical understanding, critical thinking, and problem solving skills through the core engineering courses. A computational project based on both closed-form and numerical techniques with MATLAB programming will be implemented to study an impulsive response of a frame structure. In this investigation we will analyze the system response through a finite difference numerical technique. The technique can be implemented to investigate the impulsive response for both undamped and damped system with much less complex mathematical involvement. A MATLAB script based on finite difference technique can be developed to generate numerical results of such excitation during and after acting impulsive force.

A Fault-Tolerant Control Method for Unmanned Aerial Vehicle (UAV) Formation with Topological Faults Considered

Abstract: A fault-tolerant control method for the UAV formation that has topological fault, control surface fault, actuator fault and uncertainty is proposed. Firstly, the formation motion model and the UAV motion model are established. Then based on the topological fault detection method, the topological fault reconstruction and optimization algorithm is proposed to realize the formation topological fault reconstruction and optimization with minimum communication cost and formation reconstruction cost. In designing the backstepping fault-tolerant control method, the actuator's fault identification module and the auxiliary system module are used to estimate and compensate for the faults of the actuator and the control surface respectively so as to realize the stable flight of the UAV formation under the conditions of actuator fault, control surface fault and uncertainty. The simulation results verify the superiority of the fault-tolerant control method for the UAV formation with topological faults.

New aspects of dislocation theory

Abstract: SYNOPSIS The basic dislocation concepts are briefly reviewed. Some of the characteristics of dislocation behaviour in crystalline materials are examined, and notably their elastic interaction mobility, and network formation, together with some established features of their role in such processes as crack formation and thermal ageing. Recent evidence relating to more detailed dislocation events, such as loop-formation, is reviewed, and the extension of dislocation concepts to non-metallic crystals examined, covering both the (brittle) ceramic type, and crystalline polymers. The concept of a continuous distribution of dislocations is considered, and the possibilities opened up by this important branch of the subject are generally assessed. The aim of the review as a whole is to demonstrate the degree of correlation which has been achieved between theory and experiment (particularly with work in electron microscopy), and to give an indication of the way in which the subject is developing at the present time.

Efficient Frequency Domain Feature Extraction Model using EPS and LDA for Human Activity Recognition

Abstract: Activity identification based on machine learning for human computing aims to understand or capture the state of human behavior, its environment, and integrate user by exploiting distinct types of sensors to give adjustment to the exogenous computing system. The ascent of universal computing systems requires our environment a solid requirement for novel methodologies of Human Computer Interaction (HCI). The recognition of human activities, commonly known as HAR can play a vital task in this regard. HAR has an appealing use in the health-care system and monitoring of Daily Living Activities (DLA) of elderly people by offering the input for the development of more interactive and cognitive environments. This paper is presenting a model for the recognition of Human Activities. In this proposed model, the Enveloped Power Spectrum (EPS) is used for extracting impulse components of the signal, and the Linear Discriminant Analysis (LDA) is used as a dimensionality reduction procedure to extract the discriminant features for human daily activity recognition. After completing EPS feature extraction techniques, LDA is performed on those extracted spectra for extracting features using the dimension reduction technique. Finally, the discriminant vocabulary vector is trained by the Multiclass Support Vector Machine (MCSVM) to classify human activities. For validating the proposed scheme, UCI-HAR datasets have been implemented which demonstrates higher recognition accuracy which has been acknowledged.

Deception and Farce in Post-Soviet Russian Policy vis-à-vis NATO's Expansion

Abstract: Of all the assumptions pervading the conventional wisdom about Russian foreign policy few have been more universally accepted than Russia's supposed opposition to NATO expansion. Because Russia's principal source of profit has come from rental value of natural resources from the world market, Russia's foreign policy has largely been conducted in the interests of the exporters of those resources. Compliance with NATO expansion, Moscow's decision-makers apparently believe, can only promote the pecuniary interests of that group. Given this dynamic, and confirmed by an examination of the historical record, I conclude that Moscow's leaders have acquiesced to and even supported NATO expansion.