Adaptive identification and control of structural dynamics systems using recursive lattice filters

A new approach for adaptive identification and control of structural dynamic systems by using least squares lattice filters thar are widely used in the signal processing area is presented. Testing procedures for interfacing the lattice filter identification methods and modal control method for stable closed loop adaptive control are presented. The methods are illustrated for a free-free beam and for a complex flexible grid, with the basic control objective being vibration suppression. The approach is validated by using both simulations and experimental facilities available at the Langley Research Center

Impact of Information Parameters of Online Auto Dealership Website Towards Consumer Purchase Intention

Purpose: Information plays a significant role in the online business space where consumers perform information search before making the final purchase decision. Information is the source for the word of mouth marketing which becomes critical in achieving the marketing goals of the organization. The study aims to understand the role of information presented to the customers in determining the purchase intention.     Theoretical Framework: Consumers make their purchase decision in various stages and the role of information search plays a vital role in making the decision. Theory of planned behavior and theory of reasoned action are the base theories in studying consumer behavior. However the theories take into account the usage behavior  and present lesser relevance to the information presented. This study focus on the nature of the information based on the existing literature.   Methodology: The scale to measure the Purchase Intention based on the intention attributes weretaken from (Javier A. Sánchez Torres et al,2018).Data were analysed using the MS Excel and structural equation modelling is carried out using SmartPLS3. Purposive sampling was adopted and the respondents who have used at least one Online auto dealership website were considered for the study   Findings: Credibility of the information has a higher influence towards the Purchase intention among consumers. The second highest factor that influence the purchase intention of consumers is found to be the need for the information.   Research Implications: Affordable and ease of access towards internet has opened the path towards information overload through various mobile and social media applications. In this era. Online autodealership business owners have to create methods to emphasize on authenticity of the information presented in their website. The need analysis of the consumers based using the online tools and algorithms have to be improved to suggest the type of cars.   Originality/Value: The research is one among the few studies in understanding the information parameters for an online auto dealership website and it would play a vital role in designing the content and marketing campaigns

Understanding International and Domestic Student Expectations of Peers, Faculty, and University: Implications for Professional Communication Pedagogy

Increasing populations of international students are entering Canadian universities, and instructors of Professional Communication must rapidly adapt to a changing student population. At the studied Maritime Canadian university, numbers of international students increased by 300% between 2009 and 2013. These numbers necessitate a review of our pedagogical approach to ensure student learning, success, and satisfaction in Professional Communication classrooms. Student expectations are linked to their satisfaction and, therefore, retention. We know little about the expectations incoming international students have of the university, their Canadian peers, and their instructors. We also know little about the reciprocal expectations held by domestic students and faculty of these incoming students. By surveying both domestic and international students, we sought to understand their expectations and determine if international student expectations differ from those of their domestic peers and from those of faculty. Understanding student expectations will contribute substantially to our ability to adapt pedagogy, to manage the gap between expectation and satisfaction, to develop appropriate intervention strategies, and to improve retention

Assessing the Horizontal Homogeneity of the Atmospheric Boundary Layer (HHABL) Profile Using Different CFD Software

One of the main factors affecting the reliability of computational fluid dynamics (CFD) simulations for the urban environment is the Horizontal Homogeneity of the Atmospheric Boundary Layer (HHABL) profile—meaning the vertical profiles of the mean streamwise velocity, the turbulent kinetic energy, and dissipation rate are maintained throughout the streamwise direction of the computational domain. This paper investigates the preservation of the HHABL profile using three different commercial CFD codes—the ANSYS Fluent, the ANSYS CFD, and the Siemens STAR-CCM+ software. Three different cases were considered, identified by their different inlet conditions for the inlet velocity, turbulent kinetic energy, and dissipation rate profiles. Simulations were carried out using the RANS k-ε turbulence model. Slight variations in the eddy viscosity models, as well as in the wall boundary conditions, were identified in the different software, with the standard wall function with roughness being implemented in the Fluent applications, the scalable wall function with roughness in the CFX applications, and the blended wall function option in the STAR-CCM+ simulations. There was a slight difference in the meshing approach in the three different software, with a prism-layer option in the STAR-CCM+ software, which allowed a finer mesh near the wall/ground boundary. The results show all three software are able to preserve the horizontal homogeneity of the ABL—less than 0.5% difference between the software—indicating very similar degrees of accuracy

Electric Field Analysis of Breast Tumor Cells

An attractive alternative treatment for malignant tumors that are refractive to conventional therapies, such as surgery, radiation, and chemotherapy, is electrical-pulse-mediated drug delivery. Electric field distribution of tissue/tumor is important for effective treatment of tissues. This paper deals with the electric field distribution study of a tissue model using MAXWELL 3D Simulator. Our results indicate that tumor tissue had lower electric field strength compared to normal cells, which makes them susceptible to electrical-pulse-mediated drug delivery. This difference could be due to the altered properties of tumor cells compared to normal cells, and our results corroborate this

Accurate time-domain gravitational waveforms for extreme-mass-ratio binaries

The accuracy of time-domain solutions of the inhomogeneous Teukolsky equation is improved significantly. Comparing energy fluxes in gravitational waves with highly accurate frequency-domain results for circular equatorial orbits in Schwarzschild and Kerr, we find agreement to within 1% or better, which we believe can be even further improved. We apply our method to orbits for which frequency-domain calculations have a relative disadvantage, specifically high-eccentricity (elliptical and parabolic) "zoom-whirl" orbits, and find the energy fluxes, waveforms, and characteristic strain in gravitational waves.Comment: 6 pages, 9 figures, 2 tables; Changes: some errors corrected. Comparison with Frequency-domain now done in stronger fiel

Clinical and operative study of otogenic intracranial complications

Background: Chronic otitis media is chronic inflammation of the mucoperiostial lining of the middle ear cleft. The prevalence of chronic otitis media and its intracranial complications poses a major public health problem in developing countries like India. By this study; we authors have attempted to highlight the significance of various etiological factors in the occurrence of intracranial complications due to chronic otitis media.Methods: The study was done prospectively in the department of otorhinolaryngology, J.A. group of hospitals, G. R. medical college, Gwalior during the period October 2007-2008. Thirty patients presenting to ear, nose and throat unit, diagnosed as having intracranial complications due to chronic otitis media were included in this study.Results: Most intracranial complications cases were that of meningitis. One third of the cases had past surgical history like mastoid exploration and incision & drainage of post aural abscess, and one fourth of the cases had associated extracranial complications like post aural abscess, lower motor neuron palsy, labrynthitis.Conclusion: The present study and the reference studies, both reveal that the intracranial complications of chronic otitis media are still common till date, and their signs and symptoms are often subtle until late in the course of the disease. Hence, clinicians need to maintain high index of suspicion to avoid delay in diagnosis as morbidity and mortality rates are still high, even with the advent of modern antimicrobials and aggressive surgical intervention.