DEM test, visagraph eye movement recordings, and reading ability in children

Purpose. To determine how Developmental Eye Movement (DEM) test results relate to reading eye movement patterns recorded with the Visagraph in visually normal children, and whether DEM results and recorded eye movement patterns relate to standardized reading achievement scores. Methods. Fifty-nine school-age children (age = 9.7 ± 0.6 years) completed the DEM test and had eye movements recorded with the Visagraph III test while reading for comprehension. Monocular visual acuity in each eye and random dot stereoacuity were measured and standardized scores on independently administered reading comprehension tests [reading progress test (RPT)] were obtained. Results. Children with slower DEM horizontal and vertical adjusted times tended to have slower reading rates with the Visagraph (r = -0.547 and -0.414 respectively). Although a significant correlation was also found between the DEM ratio and Visagraph reading rate (r = -0.368), the strength of the relationship was less than that between DEM horizontal adjusted time and reading rate. DEM outcome scores were not significantly associated with RPT scores. When the relative contribution of reading ability (RPT) and DEM scores was accounted for in multivariate analysis, DEM outcomes were not significantly associated with Visagraph reading rate. RPT scores were associated with Visagraph outcomes of duration of fixations (r = -0.403) and calculated reading rate (r = 0.366) but not with DEM outcomes. Conclusions.DEM outcomes can identify children whose Visagraph recorded eye movement patterns show slow reading rates. However, when reading ability is accounted for, DEM outcomes are a poor predictor of reading rate. Visagraph outcomes of duration of fixation and reading rate relate to standardized reading achievement scores; however, DEM results do not. Copyright © 2011 American Academy of Optometry.

A coupled SPH-DEM model for fluid and solid mechanics of apple parenchyma cells during drying

A coupled SPH-DEM based two-dimensional (2-D) micro-scale single cell model is developed to predict basic cell-level shrinkage effects of apple parenchyma cells during air drying. In this newly developed drying model, Smoothed Particle Hydrodynamics (SPH) is used to model the low Reynolds Number fluid motions of the cell protoplasm, and a Discrete Element Method (DEM) is employed to simulate the polymer-like cell wall. Simulations results reasonably agree with published experimental drying results on cellular shrinkage properties such as cellular area, diameter and perimeter. These preliminary results indicate that the model is effective for the modelling and simulation of apple parenchyma cells during air drying.

A coupled SPH-DEM model for micro-scale structural deformations of plant cells during drying

A single plant cell was modeled with smoothed particle hydrodynamics (SPH) and a discrete element method (DEM) to study the basic micromechanics that govern the cellular structural deformations during drying. This two-dimensional particle-based model consists of two components: a cell fluid model and a cell wall model. The cell fluid was approximated to a highly viscous Newtonian fluid and modeled with SPH. The cell wall was treated as a stiff semi-permeable solid membrane with visco-elastic properties and modeled as a neo-Hookean solid material using a DEM. Compared to existing meshfree particle-based plant cell models, we have specifically introduced cell wall–fluid attraction forces and cell wall bending stiffness effects to address the critical shrinkage characteristics of the plant cells during drying. Also, a moisture domain-based novel approach was used to simulate drying mechanisms within the particle scheme. The model performance was found to be mainly influenced by the particle resolution, initial gap between the outermost fluid particles and wall particles and number of particles in the SPH influence domain. A higher order smoothing kernel was used with adaptive smoothing length to improve the stability and accuracy of the model. Cell deformations at different states of cell dryness were qualitatively and quantitatively compared with microscopic experimental findings on apple cells and a fairly good agreement was observed with some exceptions. The wall–fluid attraction forces and cell wall bending stiffness were found to be significantly improving the model predictions. A detailed sensitivity analysis was also done to further investigate the influence of wall–fluid attraction forces, cell wall bending stiffness, cell wall stiffness and the particle resolution. This novel meshfree based modeling approach is highly applicable for cellular level deformation studies of plant food materials during drying, which characterize large deformations.

Very high resolution optical satellites for DEM generation : a review

The advent of very high resolution (VHR) optical satellites capable of producing stereo images led to a new era in extracting digital elevation model which commenced with the launch of IKONOS. The special specifications of VHR optical satellites besides, the significant economic profit stimulated other countries and companies to have their constellations such as EROS-A1 and EROS-B1 as the cooperation between Israel and ImageSat. QuickBird, WorldView-1 and WorldVew-2 were launched by DigitalGlobe. ALOS and GeoEye-1 were offered by Japan and GeoEye Respectively. In addition to aforementioned satellites, Indian and South Korea initiated their own constellation by launching CartoSat-1 and KOPOSAT-2 respectively.The availability of all so-called satellites make a huge market of stereo images for extracting of digital elevation model and other correspondent applications such as, producing orthorectifcatin images and updating maps. Therefore, there is a need for a comprehensive comparison for scientific and commercial clients to choose appropriate satellite images and methods of generating digital elevation model to obtain optimum results. This paper will thus give a review about the specifications of VHR optical satellites. Then it will discuss the automatic elaborating of digital elevation model. Finally an overview of studies and corresponding results is reported.

Das Übersetzen von Texten der Musikgattung Lied : am Beispiel von zehn Liedern aus dem Zyklus Winterreise von Franz Schubert und deren Übersetzungen

Tämän pro gradu -tutkielman tarkoituksena on edistää ja kehittää saksalaisen liedmusiikin suomennosten tutkimusta. Tutkimusaineistona on käytetty kymmentä laulua Franz Schubertin säveltämästä laulusarjasta Winterreise (1827), joka pohjautuu Wilhelm Müllerin runoihin, ja Kyllikki Solanterän suomennoksia (1960) kyseisistä lauluista. Lähtökohtana oli lähtökielinen teksti, johon suomennosta verrattiin. Hypoteesina oli, että tavulukujen merkitys liedmusiikin kääntämisessä on suurempi kuin muiden lingvististen tai semanttisten ominaisuuksien, koska musiikki ja nuotit asettavat tiukat rajat käännökselle, eikä kääntäjä voi muuttaa kappaleen musiikillista rakennetta. Sanatarkan käännöksen sijaan kääntäjän tulee pyrkiä säilyttämään kappaleen semanttinen sisältö ja tunnelma riimejä unohtamatta. Aluksi kerrotaan taustatietoja säveltäjästä, sanoittajasta, teoksesta, liedmusiikista ja kääntäjästä. Teoriaosiossa kartoitetaan, mihin kategorioihin liedtekstien kääntäminen voidaan luokitella kuuluvaksi. Analyysi pohjautuu Wittbrodtin luokitteluun (1995). Teoriaosiossa käsitellään myös ekvivalenssia, adekvaattisuutta, näennäiskäännöksiä, tyyliä, uskollisuutta alkuperäisteokselle, vapaan kääntämisen rajoja ja käännösvirheitä tutkittavasta materiaalista valikoitujen esimerkkien pohjalta. Esimerkkejä edeltää aina teoriaosuus. Varsinainen vertailuosio, jossa vertaillaan lähtö- ja kohdetekstejä, on jaettu kuuteen osioon: säe- ja säkeistöluvut, sanaluvut, tavuluvut, kirjaimien poisjättö, suorat ja epäsuorat kysymykset sekä kappaleiden nimet. Sana- ja tavulukujen eroavaisuuksista esitetään myös taulukot. Sana- ja tavulukujen kohdalla pohditaan, mistä erot johtuvat. Kaiken kaikkiaan pohditaan myös, ovatko käännösratkaisut onnistuneita, ja miten kääntäjä on niihin päätynyt. Laulettavuutta käsittelevässä osiossa esitetään ensin aikaisempia pohdintoja ja tutkimustuloksia kyseisestä aiheesta. Lopuksi teen Mannilan Blueprint-metodin (2005) mukaiset testit. Metriikkatestin teen esimerkinomaisesti yhdelle säkeistölle ja musikaalisen testin teen kaikille kymmenelle laululle. Musikaalisessa testissä analysoidaan tarkemmin lähtökielisiä säkeitä ja niiden suomenkielisiä vastineita, joiden tavuluvut eroavat toisistaan. Loppupäätelmiä edeltävässä luvussa esitetään vielä suomalaisen lauluntekijän ajatuksia sanoittamisesta. Hypoteesi tavuluvuista osoittautui oikeaksi. 146 säkeestä vain viidessä eivät lähtö- ja kohdetekstin tavuluvut olleet identtiset, mikä todistaa sen, että kääntäjä pyrkii säilyttämään kappaleen rytmin. Kääntäjä on myös säilyttänyt kappaleiden riimit, mikä vaikuttaa osaltaan rytmin säilymiseen. Sanalukujen kohdalla taas vain 16 säkeellä oli identtiset sanaluvut, mikä kertoo siitä, että niitä tärkeämpää on säilyttää kappaleen semanttinen sisältö ja tunnelma. Käännösten voidaan katsoa kuuluvan useaan kategoriaan. Kappaleiden käännökset ovat suurimmalta osin ekvivalentteja, mutta osittain ne voidaan luokitella näennäiskäännöksiksi. Tyyli ei ole säilynyt virheettömänä aivan jokaisessa käännöksessä, mutta yhtään kääntäjän puutteellisesta kieli- tai kääntämistaidosta johtuvaa käännösvirhettä kappaleissa ei ole. Suomentaja ei ole tuottanut yhtään täydellisen sanatarkkaa käännöstä, vaikka leksikaalinen ero on osittain vain hiuksenhieno. Tämä osoittaa sen, että vapaan kääntämisen aste on liedmusiikin suomennoksissa suhteellisen korkea. Kaiken kaikkiaan Solanterän käännöksiä voi pitää suhteellisen onnistuneina.

A coupled SPH-DEM approach to model the interactions between multiple red blood cells in motion in capillaries

Red blood cells (RBCs) are the most common type of blood cells in the blood and 99% of the blood cells are RBCs. During the circulation of blood in the cardiovascular network, RBCs squeeze through the tiny blood vessels (capillaries). They exhibit various types of motions and deformed shapes, when flowing through these capillaries with diameters varying between 5 10 µm. RBCs occupy about 45 % of the whole blood volume and the interaction between the RBCs directly influences on the motion and the deformation of the RBCs. However, most of the previous numerical studies have explored the motion and deformation of a single RBC when the interaction between RBCs has been neglected. In this study, motion and deformation of two 2D (two-dimensional) RBCs in capillaries are comprehensively explored using a coupled smoothed particle hydrodynamics (SPH) and discrete element method (DEM) model. In order to clearly model the interactions between RBCs, only two RBCs are considered in this study even though blood with RBCs is continuously flowing through the blood vessels. A spring network based on the DEM is employed to model the viscoelastic membrane of the RBC while the inside and outside fluid of RBC is modelled by SPH. The effect of the initial distance between two RBCs, membrane bending stiffness (Kb) of one RBC and undeformed diameter of one RBC on the motion and deformation of both RBCs in a uniform capillary is studied. Finally, the deformation behavior of two RBCs in a stenosed capillary is also examined. Simulation results reveal that the interaction between RBCs has significant influence on their motion and deformation.

Numerical modelling of deformation behaviour of red blood cells in microvessels using the coupled SPH-DEM method

This thesis developed an advanced computational model to investigate the motion and deformation properties of red blood cells in capillaries. The novel model is based on the meshfree particle methods and is capable of modelling the large deformation of red blood cells moving through blood vessels. The developed model was employed to simulate the deformation behaviour of healthy and malaria infected red blood cells as well as the motion of red blood cells in stenosed capillaries.

Gedichte Gesammelt in Nord-Afrika zwischen dem 10. Dezember 1940 und dem 1. April 1942

Poems by Vera LaRouche compiled in North Africa between December 10, 1940 and April 1, 1942. (6p/typed)

K. u. K. Landsturm : Erinnerungen aus dem Weltkriege in vier Bildern /

Manuscript: "K. u. K. Landsturm. Erinnerungen aus dem Weltkriege in vier Bildern". Autobiographical play, in four acts, recalling life in the Imperial Austrian Army in a Hungarian village in 1916.

Der Weg in den Holocaust : Mit Bildern aus dem Leben der juedischen Gemeinde in Schmallenberg.

Photocopies of a catalogue for an exhibition in Schmallenberg on occasion of the town’s 750th anniversary in November 1994.

Post-liquefaction undrained monotonic behaviour of sands: experiments and DEM simulations

This paper presents the results of a series of servo-controlled cyclic triaxial tests and numerical simulations using the three- dimensional discrete element method (DEM) on post-liquefaction undrained monotonic strength of granular materials. In a first test series,undrained monotonic tests were carried out after dissipating the excess pore water pressure developed during liquefaction. The influence of different parameters such as amplitude of axial strain,relative density and confining pressure prior to liquefaction on the post-liquefaction undrained response have been investigated.The results obtained highlight an insignificant influence of amplitude of axial strain, confining pressure and a significant influence of relative density on the post-liquefaction undrained monotonic stress-strain response.In the second series, undrained monotonic tests were carried out on similar triaxial samples without dissipating the excess pore water pressure developed during liquefaction. The results highlight that the amplitude of axial strain prior to liquefaction has a significant influence on the post-liquefaction undrained monotonic response.In addition,DEM simulations have been carried out on an assembly of spheres to simulate post-liquefaction behaviour.The simulations were very similar to the experiments with an objective to understand the behaviour of monotonic strength of liquefied samples from the grain scale. The numerical simulations using DEM have captured qualitatively all the features of the post-liquefaction undrained monotonic response in a manner similar to that of the experiments.In addition,a detailed study on the evolution of micromechanical parameters such as the average coordination number and induced anisotropic coefficients has been reported during the post-liquefaction undrained monotonic loading.

Study of gas cavity size hysteresis in a packed bed using DEM

When a high velocity gas jet is introduced into a packed bed a cavity is formed. The size of the cavity shows hysteresis on increasing and decreasing gas flow rates. This hysteresis leads to different cavity sizes at same gas flow rate depending on the bed history. The size of cavity affects the gas flow profiles in the packed bed. In this study the cavity size hysteresis phenomenon has been modeled using discrete element method along with turbulent gas flow. A reasonable agreement has been found between computed and experimental results on cavity size ysteresis. The effect of various parameters, such as nozzle height from the bed bottom and packing height, on the cavity size hysteresis has been studied. It is found that inter-particle interaction forces along with gas drag and bed porosity play an important role in describing the cavity size hysteresis. The injection of gas flow allows the particles to go to an unconstrained state than they were previously in, and their ability to remain in that state, even under decreased gas drag force, leads to the phenomenon of cavity size hysteresis. (c) 2007 Elsevier Ltd. All rights reserved.