The present study investigated whether spatial ability is correlated with the ability to accurately recognize faces. A samp~e pf 36 undergraduates were recruited for this study. Participants completed two measures of spatial ability: The Purdue Visualization of Rotations Test as a measure of mental rotation and the Object Location Memory Test as a measure of memory for the location of objects in relation to one another. Facial recognition was measured usipg the Cambridge Face Metnory Test, which measures the recognition of faces in both upright and inverted positions. As predicted, a significant relationship was found between mental rotation and inverted facial recognition, r = .33,p < .05. There was not a significant relationship between object location memory and upright facial recognition, r=.07,p > .05. Interestingly, upright facial recognition was more closely associated with mental rotation, though the relationship did not reach statistical significance r = .24,p > .05. There was not a significant relationship between overall spatial ability and overall facial recognition, r = .17,p > .05. The traditional gender differences were found oh spatial ability such that males outperformed females on mental rotation (Males: M= 12.73, SD= 3.93; Females: M= 9.32, SD= 4.11) and females outperformed males on object location memory (Females: M= 18.80, SD= 5.53; Males: M= 14.09,_ SD= 8.19). A significant gender difference on facial recognition such that females outperform males was not found, which contradicts findings from past J research (McBain, Norton, & Chen, 2009). These results suggest that mental rotation is an important factor in human facial recognition.

Locked-in planar rotational motion for satellites moving in a gravity gradient field is examined using both analytical and numerical techniques. It is shown that rotational locks at spin rates of n/2 (where n is an integer) satellite rotations per orbit revolution exist for specific combinations of satellite inertia properties and orbital eccentricity. For nearly axial symmetric satellites, the maximum and minimum instantaneous rates which permit the satellite to remain in a particular rotational lock are found analytically by applying the averaging techniques of Kryloff and Bogolinboff and that of Symon. For these cases, it is found that the strength of the higher rotational locks (n > 3) are greater than the strength of the n = 2 or 1/1 rotational lock for proper combinations of lock number, n, and orbital eccentricity. Comparison of the results for the case of the planet Mercury are shown to be in good agreement with both observations of the planet and the 2 numerical calculations of Liu. Numerical results were obtained for representative values throughout the range of satellite inertia properties. Periodic solutions of periods 2π and 4 π are found and their variational stability investigated by Floquet analysis. The results which are presented on stability charts show that for satellites that deviate appreciably from axial symmetry, the stable periodic solutions occur at eccentricities which tend to increase as the absolute value of the lock number |n| increases. Estimates of the strength of these rotational locks are found by applying the phase space technique of Brereton and Modi. For nearly axially symmetric satellites, the results of this technique agreed favorably with the analytical results. Rotational locks for satellites that are not nearly axial symmetric were found in general to be considerably weaker than the more frequently investigated 1/1 lock. / Ph. D.

The effects of two forms of mid-rotation release on thinned, fertilized loblolly pine (Pinus taeda L.) plantations in Virginia were examined: aerial imazapyr and basal triclopyr application. Imazapyr measurement plots were installed in nine Piedmont and twelve Coastal Plain plantations operationally released with imazapyr, and triclopyr measurement plots were installed within a controlled fertilization/release study spanning both regions. No differences in volume were detected following triclopyr release. All release dates combined, Piedmont released areas averaged 0.06 m3/tree (18%) greater than the control and Coastal Plain released areas averaged 0.05 m3/tree (14%) greater than the control. Reductions in hardwood basal area, stem density, and shrub stratum cover were observed for both forms of release. Reductions in shrub stratum richness and diversity were also documented for imazapyr release; however, trends indicate that richness and diversity, as well as stem density and shrub stratum cover, may recover to pre-treatment levels. Herbaceous vegetation was increased on triclopyr sites, which was reflected in an elevated turkey (Meleagris gallopavo sylvestris L.) food/brood index. Following imazapyr release, habitat suitability index (HSI) values for pine warblers (Dendroica pinus L.) and black-capped chickadees (Parus atricapillus L.) increased due to reductions in canopy hardwoods and increases in snags. Reduced shrub stratum density resulted in a lower bobwhite quail (Colinus virginianus L.) cover index on imazapyr-released areas. / Master of Science

In 2003 eight peanut and cotton crop rotations were established in southeastern Virginia, 4 of which included 2 or 3 years of tall fescue or orchardgrass grown as high-value hay crops. Each crop rotation was evaluated for changes in soil quality indicators including soil carbon and nitrogen, water stable soil aggregates, plant available water content, bulk density, cone index values, and soil moisture. Cotton and peanut growth and yield were also observed to evaluate changes in crop growth associated with differences in soil quality. Soilborne plant pathogens including root-knot nematode, stubby root nematode, ring nematode, stunt nematode, and Cylindrocladium parasiticum microsclerotia were measured in the spring and fall of each year to determine differences associated with crop rotations. Water stable soil aggregates in 2007 were higher in rotations with 3 years of either perennial grass. Soil moisture tended to be the highest at depths 30 - 60 cm in the 3-year tall fescue rotation in August and September 2007. Cotton in 2006 and peanut in 2007 had higher growth and yield where the annual crop directly followed a perennial grass. Root-knot nematode tended to decrease in all rotations over time. Stubby root nematode populations tended to increase in rotations with either duration of orchardgrass. Including perennial grasses in cotton and peanut rotations has the potential to increase growth and yield as demonstrated in this research. / Master of Science

No

No / Chest radiography is one of the most commonly performed radiographic examinations worldwide. Routinely acquired in the erect posteroanterior (PA) position, a chest radiograph displays substantial amounts of medical information when accurate patient positioning is achieved. However, a rotated PA chest radiograph has reduced diagnostic quality and appearances may mask or mimic chest pathology. Radiographic assessment of patient rotation around the sagittal plane has traditionally been undertaken by assessing the distance between the medial end of the clavicles and a line drawn through the spinous processes at the level of the clavicles. This approach continues to be advocated in radiographic technique textbooks internationally although no identified author has provided criteria to determine when a rotated PA chest radiograph should be repeated; determined the relationship between perceived clavicle to spinous process distance and actual degree of patient rotation; or considered the impact of body morphology, in particular the anteroposterior thoracic diameter, on radiographic appearances of rotation. Objectives To determine the impact of anteroposterior chest diameter on radiographic appearances of sagittal rotation on PA chest radiographs. Design Experimental study. Methods and Settings Sixty computed tomography thorax examinations, stratified for gender, were reviewed and data aggregated to determine average anteroposterior (AP) thoracic dimensions. A bespoke experimental unit was constructed specifically to enable testing of the impact of sagittal rotation on radiographic appearances. The experimental unit was situated within a calibrated circular frame enabling 360° rotation at 1° intervals around a central rotational point. The experimental unit components were varied in 1 cm intervals from 9 cm to 15 cm around the central rotation point to reflect varying AP chest diameters. At each interval, images were acquired at 0, 2, 5, 7, 10, and 15° sagittal rotation using a horizontal central ray, consistent centring point, and a source-image distance of 180 cm. Results A clear linear relationship between AP thoracic diameter and the radiographic appearances of sagittal rotation was noted. Considering significant rotation to be when the medial end of clavicle overlaps the spinous process on the radiographic image, this appearance occurred at a much smaller degree of rotation on wide AP thoracic diameters (15 cm, 5°) than narrower AP thoracic diameters (9 cm, 10°). Conclusions The routine application of the distance between the medial end of the clavicles and a line drawn through the spinous processes at the level of the clavicles as a method of assessing degree of sagittal rotation, diagnostic image quality, and need for repeat is flawed. Persistence in the application of this approach without cognisance of the impact of body morphology on radiographic appearances will result in persons with large AP thoracic diameters being more likely to have a PA chest radiograph repeated for a specified degree of rotation than persons with smaller AP thoracic diameters.

Beethoven's early sonatas have already revealed a complex and varied technique that can present significant difficulties for intermediate piano students. In particular, the absence of systematic methodological guidance, as well as the lack of suitable and high-quality repertoire, can result in students struggling to learn Beethoven's piano technique and not being satisfied with the results. By examining and analyzing the theories of great educators, pedagogues, and performers, some of the standard technical patterns are identified and methods of mastering them are summarized. A sampling of related late-elementary level and intermediate level repertoire is identified, providing study material for students starting to learn the Beethoven sonatas, and serving as a guide for their teachers.

Montréal Trigonix inc. 2018

<p>Syftet med detta examensarbete är att ta reda på hur elevers uppfattningar om de rörelser som sker i vårt solsystem stämmer överens med de vetenskapliga fakta som finns. I våra vardagliga situationer refererar vi till det vi med ögats hjälp kan uppfatta i fråga om vad som rör sig eller ej. Hur påverkas eleverna av de dagliga uttryck som de får höra sedan de är mycket små, och har de en möjlighet att med skolans hjälp förändra dessa tankesätt?</p><p>Undersökningen genomfördes med hjälp av kvalitativa intervjuer av elever i skolår 1 respektive 5. Detta för att se hur stor skillnaden är mellan de elever som inte har erhållit någon undervisning om solsystemet och de elever som ska ha uppnått de mål för fysik som skolverket har ställt upp.</p><p>Eleverna som deltog i studien valdes slumpmässigt ur respektive klasser. De fick besvara 14 frågor, var och en för sig. De besvarade frågorna olika utförligt, vissa var mycket fåordiga. Ibland var jag tvungen att ställa följdfrågor, eftersom jag ville förstå eleverna på ett bra sätt.</p><p>Resultatet av undersökningen visar att elevernas kunskaper inom området har en stor variation, även inom samma åldrar. Detta kan härledas till elevernas eget intresse av vårt solsystem. Den slutsats som jag har dragit av undersökningen är att det är viktigt att ta reda på vilka föreställningar som eleverna har inför arbetet med arbetsområdet.</p> / <p>The purpose of this degree project is to find pupils´ understanding about the movements which occur in our solar system and compare them with the scientific facts we know about. In our daily life we refer to what we can see with the help from our eyes whether something moves or not. How do the pupils´ get affected by these daily expressions they hear from early ages, and do they have an opportunity with the help from the school to change these ways of thinking?</p><p>The survey was carried out with help of qualitative interviews of pupils´ in class 1 and 5. This because to see how large the difference is between pupils´ who hasn’t received any education about the solar system and the pupils´ who are supposed to have reached the goals compiled by The National Agency for Education.</p><p>The pupils´ who took part in this study were chosen by random from both classes. They answered to 14 questions, each and everyone on their own. They answered the questions with various details, some were very taciturn. Sometimes I had to ask resulting questions, since I wanted to understand the pupils´ properly.</p><p>The result of the survey shows that the pupils´ knowledge within the area have a large variation, even within the same ages. This can be deduced to the interest of the pupils´ in our solar system. The conclusion I have maid from this survey are that it is important to find out which understandings the pupils´ have before the work with the subject area.</p>

Réalisé en co-direction avec Antoine Strugarek. / La tachocline solaire est encore aujourd’hui un important sujet de débat dans la communauté. La compréhension de cette mince couche, à l’interface entre les zones radiative et convective, est très importante à la compréhension globale du fonctionnement du Soleil. En effet, l’inclusion d’une tachocline a un impact majeur dans les modèles de dynamo générant le champ magnétique du Soleil. De plus, la rotation différentielle observée dans la zone de convection devrait se propager dans la zone de radiation, où la rotation est uniforme, de sorte que la tachocline devrait être beaucoup plus épaisse que ce que les observations indiquent. Le processus menant au confinement de la tachocline est encore incertain, bien que de nombreuses hypothèses furent apportées pour tenter de l’expliquer. Un des ces scénarios propose que la pénétration du champ magnétique dynamo sous la zone convective mène à la suppression de la rotation différentielle dans la tachocline. Nous présentons ici un modèle MHD simplifié en une dimension afin de tester ce scénario de tachocline rapide. Nous nous intéressons à deux cas particuliers : une tachocline où le transport de moment cinétique est dû à la viscosité, puis une tachocline où l’épaississement radiatif domine la viscosité. Nous avons analysé plusieurs simulations dans le but de déterminer dans quelles conditions physiques le confinement de la tachocline est possible via ce scénario. L’amplitude du champ magnétique pénétrant sous la zone convective, la diffusivité magnétique, la viscosité et la diffusivité thermique ont un impact majeur sur les résultats et nous concluons en déterminant selon quels régimes de paramètres la tachocline pourrait être confinée par un tel champ dynamo. / The solar tachocline remains the subject of vigorous ongoing research efforts. Understanding the dynamics of this thin layer at the interface between the radiative and convective zones is important to the overall understanding the Sun’s inner workings. Indeed, the presence of a tachocline plays a major role in most dynamo models that describe the generation of the solar magnetic field. Moreover, the differential rotation observed in the convection zone should spread in the radiation zone, where the rotation is uniform, so the tachocline should be much thicker than inferred from helioseismic inversions. The physical mechanism(s) responsible for confining the tachocline has not yet been identified with confidence, although many promising hypotheses have been put forth. One of these invokes the penetration of a dynamo magnetic field below the convective zone, leading to the suppression of the differential rotation in the tachocline through the action of magnetic stresses. We present here a simplified MHD model formulated in one spatial dimension, in order to test this fast tachocline scenario. We focus on two specific physical cases : one where the angular momentum transport is due to the viscosity and the other where radiative spreading dominates over viscosity. We carry out and analyze several simulations to determine under which physical conditions the confinement of the tachocline is possible via this scenario. The amplitude of the magnetic field penetrating the convective zone, the magnetic diffusivity, the viscosity and the thermal diffusivity all have a major impact on the results, and we conclude by determining under which parameters the tachocline could be confined by such a dynamo field.