Monomial Relization of Crystal Bases for Special Linear Lie Algebras

We give a new realization of crystal bases for finite dimensional irreducible modules over special linear Lie algebras using the monomials introduced by H. Nakajima. We also discuss the connection between this monomial realization and the tableau realization given by Kashiwara and Nakashima.Comment: 15 page

Motion compensated images using Rgb data

A motion compensation algorithm correcting not only for translation but also for rotation, scaling, and shearing, is investigated in this thesis. Our work also includes noise detection and noise compensation due to the variation of the light. The probability distribution of the noise is investigated. The variation of the light could occur due to the voltage variation or due to the sunlight variation in the presence of clouds, or other reasons. Practical results have also been obtained by applying our theory to moving pictures

Young Wall Realization of Crystal Bases for Classical Lie Algebras

In this paper, we give a new realization of crystal bases for finite dimensional irreducible modules over classical Lie algebras. The basis vectors are parameterized by certain Young walls lying between highest weight and lowest weight vectors.Comment: 27page

“I guess someone forgot to ask us if we wanted to be America’s diversity mascots”: The identity journey of transracial, transnational, Korean adoptees

Korean, transracial, international adoptees (TRIAs) have been given an opportunity to tell their stories in the anthologies Seeds of a Silent Tree, Voices from Another Place, and More Voices. Through an examination of twelve stories from these three anthologies, I pinpoint issues that are faced by TRIAs who were raised in white families, and the significance these issues hold. I also discuss the unique perspectives displayed in each anthology, and the overall view of racial identity that can be observed through the study of a unique community. Through their status as in-between races and cultures, Korean, transracial, international adoptees can illuminate issues of race that would otherwise be forgotten. Through choices of display, TRIAs make clear statements about their colors, bodies, and races

Characteristics of Eco-friendly Kenaf Fiber-Imbedded Nonwoven for Automotive Application

This study examined the physical properties of kenaf fiber-imbedded nonwoven for automotive pillar trim according to the blend ratio of the fibers and needle-punching process conditions. Kenaf-imbedded nonwoven specimens mixed with polypropylene (PP) and low-melt PET (LM PET) fibers were prepared via needle-punching, and their physical properties such as air permeability, water absorption, sound absorption coefficient, and porosity were investigated according to the various processing conditions. The kenaf-imbedded nonwoven treated with high needle depth in the needle-punching process and/or mixed with a large amount of LM PET exhibited the highest breaking and tearing strengths, due to the high weight of the nonwoven specimens. A high blend percentage of LM PET fibers reduced the pore size, which resulted in low air permeability and water absorption. The sound absorption coefficient of the kenaf-imbedded nonwoven specimens was highly dependent on its weight and thickness. Regarding the lamination treatment, the laminated nonwoven exhibited higher breaking and tearing strengths, thermal conductivity, and sound absorption coefficient than the non-treated one. In addition, the HDPE powder-treated nonwoven exhibited lower breaking and tearing strengths, air permeability, water absorption, and sound absorption, due to the reduced pore size

Interactions between the pathogenic bacterium Vibrio parahaemolyticus and red-tide dinoflagellates

Vibrio parahaemolyticus is a common pathogenic bacterium in marine and estuarine waters. To investigate interactions between V. parahaemolyticus and co-occurring redtide dinoflagellates, we monitored the daily abundance of 5 common red tide dinoflagellates in laboratory culture; Amphidinium carterae, Cochlodinium ploykrikoides, Gymnodinium impudicum, Prorocentrum micans, and P. minimum. Additionally, we measured the ingestion rate of each dinoflagellate on V. parahaemolyticus as a function of prey concentration. Each of the dinoflagellates responded differently to the abundance of V. parahaemolyticus. The abundances of A. carterae and P. micans were not lowered by V. parahaemolyticus, whereas that of C. polykrikodes was lowered considerably. The harmful effect depended on bacterial concentration and incubation time. Most C. polykrikoides cells died after 1 hour incubation when the V. parahaemolyticus concentration was 1.4×107 cells ml-1, while cells died within 2 days of incubation when the bacterial concentration was 1.5×106 cells ml-1. With increasing V. parahaemolyticus concentration, ingestion rates of P. micans, P. minimum, and A. carterae on the prey increased, whereas that on C. polykrikoides decreased. The maximum or highest ingestion rates of P. micans, P. minimum, and A. carterae on V. parahaemolyticus were 55, 5, and 2 cells alga-1 h-1, respectively. The results of the present study suggest that V. parahaemolyticus can be both the killer and prey for some red tide dinoflagellates. © 2011 Korea Ocean Research & Development Institute (KORDI) and the Korean Society of Oceanography (KSO) and Springer Netherlands.Y

Input-output analysis of high-speed turbulent jet noise

University of Minnesota Ph.D. dissertation. June 2018. Major: Aerospace Engineering and Mechanics. Advisor: Joseph Nichols. 1 computer file (PDF); xxi, 149 pages.We use input-output analysis to predict and understand the aeroacoustics of high-speed turbulent jets. We consider linear perturbations about Reynolds-averaged Navier-Stokes (RANS) solutions of ideally expanded, axisymmetric, compressible turbulent jets under various operating conditions. For jet noise, a key aspect of our method is the ability to spatially separate near-field input forcing (driven by nonlinear turbulence) from far-field acoustic output. Precisely the same idea, namely the separation of sources and outputs, forms the basis of traditional acoustic analogies. Different from the usual statistical descriptions of the acoustic source terms, input-output analysis provides a dynamical description based on modes correlated over significant distances within the flow. Specifically, we compute optimal and sub-optimal harmonic forcing functions and their corresponding linear responses governed either by the linearized Euler equations (LEE) or by the linearized Navier-Stokes (LNS) equations, using singular value decomposition of the resolvent operator. For supersonic jets, the optimal response closely resembles a wavepacket in both the near-field and the far-field such as those obtained by the parabolized stability equations (PSE), and this mode dominates the response. For subsonic jets, however, the singular values indicate that the contributions of sub-optimal modes to noise generation are nearly equal to that of the optimal mode, explaining why the PSE do not fully capture the far-field sound in this case. Furthermore, we utilize a high-fidelity large-eddy simulation (LES) data to assess the prevalence of sub-optimal modes in the unsteady data. By projecting the LES source term data onto input modes and the LES acoustic far-field onto output modes, respectively, we demonstrate that sub-optimal modes of both types are physically relevant. Far-field acoustics generated from turbulent jets are further modeled, using a Ffowcs Williams-Hawkings (FW-H) solver implemented directly within linear input-output analysis framework. Our hybrid input-output/FW-H method efficiently connects input fluctuations embedded in the jet turbulence to pressure outputs in the far-field, and recovers a significant portion of the LES acoustic energy. By repeating input-output analysis over a wide range of frequencies, we find that the far-field acoustic spectra broaden with increasing the radiation angles, as observed in experiments. To distill acoustically relevant sources, input forcings are further restricted by introducing a new weighting matrix, which selects forcing functions only in the region that contains high turbulent kinetic energy (TKE). We then find that input modes correspond exactly to wavepackets with asymmetric pseudo-Gaussian envelope functions. Furthermore, wavepackets obtained by input-output analysis collapse to a single shape when scaled by $St^{-0.5}$, where $St$ is the jet Strouhal number. This explains the success of recent theoretical models based on stochastic similarity wavepackets