Wheat growing in Missouri

Caption title.Digitized 2006 AES MoU

Factors influencing the yield of oats

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The reinforced concrete silo

Caption title.Digitized 2006 AES MoU

Politiewerking in multiculturele buurten: de beeldvorming bij burgers en agenten over de gemeenschapsgerichte politiezorg

In deze bijdrage wordt een antwoord geformuleerd op de vraag hoe politiemensen omgaan met etnisch-culturele minderheden op basis van data verzameld in het kader van een 34 maand durend beleidsgericht onderzoek naar de toepassing van de gemeenschapsgerichte politiezorg in multiculturele buurten (in opdracht van Federaal Wetenschapsbeleid). Daarbij werden in vijf Belgische politiezones observaties uitgevoerd bij wijk- en interventieagenten die in multiculturele buurten werkzaam zijn. Het onderzoek beoogt inzicht te verwerven in de manier waarop interacties tussen politie en etnisch-culturele minderheden verlopen en de elementen die deze interacties beïnvloeden. Percepties, betekenisverlening en verwachtingen werden in kaart gebracht. Concreet zal de bijdrage ingaan op de beeldvorming over etnische culturele minderheden bij wijk- en interventieagenten met aandacht voor de inhoud ervan, de totstandkoming en de factoren die erop van invloed zijn. Vervolgens wordt de vraag beantwoord in welke mate en op welke manier beelden en attitudes ook het gedrag van de politiemensen op het terrein beïnvloeden met aandacht voor de situationele, contextuele, persoonlijke en organisatorische factoren die daarop van invloed zijn

Study of the phenomenon of barrenness in corn

TypescriptM.S. University of Missouri 1911Barrenness in corn is one of the most commonly observed phenomena exhibited by this prominent cereal, and one of the least understood. Why various, seemingly growthy and hardy stalks of corn fail to produce grain has been a source of wonder and comment to both practical farmers and agricultural investigators as well. Strange as it may seem, however, there has been practically no work done to discover why the maize plant, or any other grain normally bisexual, should be sterile. Many theories have been advanced to explain the phenomenon such as lack of food, lack of constitutional vigor, thickness of planting, and inbreeding. It has also been suggested that the condition might be hereditary, but this has in the main been generally rejected as unsound, thinking that since a barren stalk produces no seed it must surely breed itself out. Whether or not any or all of these theories will stand the test of accurate experimentation remains to be seen. On the other hand it is an undoubted fact that the barren tendency still persists in all sub-species and varieties of corn. Farmers realize their detrimental effect and are continually asking for a method whereby they may be eliminated from their fields. Nearly all attempts to eliminate them have failed so far because it is very hard to say a stalk will be barren at tasseling time and once past that time the damage is done and any interference is more than useless. Seeing then that the subject has an economic bearing as well as a purely scientific interest, what are the factors that influence barrenness in corn? The object of this work was to make a study of barren stalks of corn to discover the causes of barrenness, if possible, and to find out the factors which influence barrenness in any way.Includes bibliographical reference

Reading faces: differential lateral gaze bias in processing canine and human facial expressions in dogs and 4-year-old children

Sensitivity to the emotions of others provides clear biological advantages. However, in the case of heterospecific relationships, such as that existing between dogs and humans, there are additional challenges since some elements of the expression of emotions are species-specific. Given that faces provide important visual cues for communicating emotional state in both humans and dogs, and that processing of emotions is subject to brain lateralisation, we investigated lateral gaze bias in adult dogs when presented with pictures of expressive human and dog faces. Our analysis revealed clear differences in laterality of eye movements in dogs towards conspecific faces according to the emotional valence of the expressions. Differences were also found towards human faces, but to a lesser extent. For comparative purpose, a similar experiment was also run with 4-year-old children and it was observed that they showed differential processing of facial expressions compared to dogs, suggesting a species-dependent engagement of the right or left hemisphere in processing emotions

Recent changes of water discharge and sediment load in the Yellow River basin, China

The Yellow River basin contributes approximately 6% of the sediment load from all river systems globally, and the annual runoff directly supports 12% of the Chinese population. As a result, describing and understanding recent variations of water discharge and sediment load under global change scenarios are of considerable importance. The present study considers the annual hydrologic series of the water discharge and sediment load of the Yellow River basin obtained from 15 gauging stations (10 mainstream, 5 tributaries). The Mann-Kendall test method was adopted to detect both gradual and abrupt change of hydrological series since the 1950s. With the exception of the area draining to the Upper Tangnaihai station, results indicate that both water discharge and sediment load have decreased significantly (p<0.05). The declining trend is greater with distance downstream, and drainage area has a significant positive effect on the rate of decline. It is suggested that the abrupt change of the water discharge from the late 1980s to the early 1990s arose from human extraction, and that the abrupt change in sediment load was linked to disturbance from reservoir construction.Geography, PhysicalGeosciences, MultidisciplinarySCI(E)43ARTICLE4541-5613

Brain correlates of pro-social personality traits: a voxel-based morphometry study

Of the five personality dimensions described by the Big Five Personality Model (Costa and McCrae 1992), Extraversion and Agreeableness are the traits most commonly associated with a pro-social orientation. In this study we tested whether a pro-social orientation, as expressed in terms of Extraversion and Agreeableness, is associated with a specific grey matter phenotype. Fifty-two healthy participants underwent magnetic resonance imaging (MRI) and completed the NEO-Five Factor Inventory (NEO-FFI), a self-report measure of the Big Five personality traits. Voxel-based morphometry (VBM) was used to investigate the correlation between brain structure and the personality traits of Agreeableness and Extraversion. We found that Extraversion was negatively correlated with grey matter density in the middle frontal and orbitofrontal gyri while Agreeableness was negatively correlated with grey matter density in the inferior parietal, middle occipital and posterior cingulate gyri. No positive correlations were found. These results suggest that pro-social personality traits seem to be associated with decreases in grey matter density in more frontal regions for Extraversion, and more posterior regions for Agreeableness.This research was funded by the Portuguese Foundation for Science and Technology (FCT): PIC/IC/83290/2007, which is supported by FEDER (POFC - COMPETE), and postdoctoral grant number: SFRH/BPD/75014/2010

Corrosion and mechanical behavior of ion implanted bearing steels for improved fretting behavior

Ion implantation of AISI 52100 and 1070 steels was conducted in order to improve the corrosion, wear and ultimately the fretting behavior of the steels. Implantations consisted of 1 x 1017 Ta+ cm-2, 3 x 1017 Ti+ cm-2 + 1.5 x 1017 C+ cm-2, and 3.1 x 1017 Ti+ cm-2 + 1.55 x 1017 N+2 cm-2. All implantations were successful in improving the corrosion resistance. On average, the peak anodic current was reduced by over 300 mV, the passivation potential was reduced, and the pitting potential was increased by over 1000 mV in 0.01 M NaCl. Ti + C and Ti + N implantations increased the load-carrying capacity in lubricated scuffing tests by 60% and 40% respectively. Ta produced no improvement in scuffing resistance. Ti + N implantation increased the hardness by 25% over the unimplanted steel and both Ti + C and Ta implantation reduced the surface hardness. Fretting wear was reduced only slightly in the Ta implanted sample and increased in both the Ti + C and Ti + N implanted samples with the latter showing 4-5 times the weight loss as the unimplanted sample. The correlation between fretting and hardness supports a mechanism in which the hard surface layer breaks into fine particles which act as an abrasive under the intense load of the balls.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/31416/1/0000333.pd