84 research outputs found

    Mississippi State University Libraries Diversity Policy

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    The MSU Libraries are committed to promoting a working and learning environment free of discrimination on the basis of race, color, religion, national origin, sexual orientation or group affiliation, age, gender, disability, genetic information, marital status, or veteran status. The Libraries are committed to building and maintaining a diverse workforce which is representative of the availability of individuals with requisite skills in each component of the organization: management, faculty, staff, and student assistants. The Libraries are also committed to specific actions in recruiting, training, and mentoring which will contribute to this objective, and to fostering a work environment which will insure tolerance and respect for all. To this end, the MSU Libraries support and comply with MSU’s Diversity Strategic Plan and with the American Library Association’s Association of College and Research Libraries’ (ALA ACRL) Diversity Standards: Cultural Competency for Academic Libraries (2012)

    Older Adults Attitudes Towards New Communication Technologies

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    As the amount of New Communication Technologies (NCTs) being created increases at an exponential rate it is important to better understand how all portions of our population take advantage of newer NCTs, including older adults. This study sought to better understand older adult’s attitudes towards NCTs as a means of learning and adaption as well as maintaining independence. The researchers argued that older adult’s attitudes toward NCTs have an effect on older adult’s perceived and therefore actual usability. This study was conducted by a communication research methods course at an Ohio public university and it included surveys and interviews of 525 older adults living in the Midwestern United States. The researchers divided the participants into four age groups, Builders, Boomers, Generation Xers and Millennials, and focused primarily on web literacy, performance expectancy, and effort expectancy. The researchers found that there were significant generational differences in attitudes towards NCTs and younger generations were more likely to positively respond to newer NCTs than older generations. The researchers also found that older adults do not experience an immediate attraction to NCT’s unlike younger generations. The researchers posit that these results indicate that must be a greater focus on reducing the deficit between younger and older generations and their respective levels of NCT literacy

    Water stress during reproductive stages affects seed quality and yield of pea (Pisum sativum L)

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    International audiencePhysiological quality of pea (Pisum sativum L.) seed depends on various factors affecting the plant, including water supply, the effect of which has not been fully characterized. The effects of different periods of water stress during reproductive stages on the seed yield and seed physiological quality were investigated in field studies for 3 yr (1991, 1992, and 1993) at Brain-sur-l'Authion, France, on a Mollisol, Rendoll, eutrochreptic soil. Irrigation during seed filling (IDSF) and irrigation during the period from the start of flowering to the start of seed filling were compared with a non-irrigated (NI) and a season-long, irrigated-as-needed (WI) treatment. The physiological quality of pea seeds was assessed by germination percentage and the conductivity and cold tests. The germination percentage averaged 98% and was not modified by water stress. In 1993, rainfall during the reproductive stages was high, and there were no differences in seed yield or quality between treatments. In 1991 and 1992, the rainfall was much lower, and the NI treatment showed the lowest seed yield and quality as far as the conductivity test and cold test were concerned. The WI treatment showed the best yields. Water stress during the flowering period did not reduce seed quality more than WI, and reduced seed yield only slightly. Water stress during seed filling decreased seed yield but the effect on seed quality was not significant. Individual seed weight was higher and less variable in IDSF treatments than in WI treatments. Changing irrigation strategies for pea seed production by irrigating during seed filling may improve the physiological quality of the seedlots without decreasing the seed yield

    Modélisation du procédé de perçage assisté par vibrations

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    Les exigences de performance de l’industrie aéronautique demandent d’améliorer sans cesse les procédés d’usinage pour respecter la qualité, le coût et le délai de fabrication. Un des freins à l’amélioration de la productivité en perçage est l’évacuation des copeaux. Pour répondre à cette problématique, de nouveaux procédés ont vu le jour, tels que le perçage assisté par vibrations. En ajoutant des oscillations aux mouvements conventionnels de l’outil, il est possible de fractionner les copeaux générés pour favoriser leur évacuation. Cette technologie introduit deux nouveaux paramètres opératoires supplémentaires, l’amplitude et la fréquence des oscillations, qu’il est nécessaire de déterminer judicieusement pour optimiser le procédé. Cette optimisation nécessite la modélisation fine du perçage assisté par vibrations. Cet article présente la mise en place d’un modèle d’efforts de coupe adapté au perçage vibratoire qui tient compte en particulier du phénomène important de talonnage

    Modeling of the vibrations assisted drilling process : taking into account the Workpiece-Tool-Machine environment.

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    Le perçage assisté par vibrations est un procédé assurant la maîtrise dimensionnelle des copeaux pour gagner en fiabilité sur les opérations de perçage. L’ajout d’une oscillation axiale pilotée en amplitude et en fréquence introduit deux nouveaux paramètres à déterminer en adéquation avec les paramètres conventionnels que sont l’avance et la vitesse de coupe. Le paramétrage d’une telle opération n’est donc pas trivial. Afin de fournir un outil d’optimisation du paramétrage du procédé, une nouvelle modélisation prenant en compte l’environnement « Pièce-Outil-Machine » est proposée. L’intégration de la géométrie de l’outil, des spécificités des interactions entre l’Outil et la Matière, et du comportement dynamique de la Machine permet s’adapter aux conditions de mise en oeuvre du procédé. Une méthode d’identification dissociée des éléments de l’environnement « Pièce-Outil-Machine » permet de caractériser les spécificités de chacun de ces éléments. Cette modélisation est validée par une campagne d’essai. La modèle développé dans ces travaux permet donc de prédire le comportement du procédé en vue d’une optimisation des paramètres opératoires.Vibrations assisted drilling is a process which ensures chip shape control in order to increase reliability during drilling operations. The adding of axial oscillation, controlled with amplitude and frequency, introduce two new parameters which must determinate according to the conventional parameters (feed and speed rotation). The optimal setting of vibrations assisted drilling is not obvious. To provide an optimization-tool of the process, a new model which take into account the “Tool-Workpiece-Machine” environment, is proposed. Drill geometry, Tool-Workpiece interactions and dynamic behavior of the Machine are incorporated in the model. Tis specificity allows adjusting behavior of the process with the case of application. An identification methodology is presented to characterize the environment. Simulation’s results and experimental results are compared to validate the model. This model thus allows predicting process behavior in order to optimize the operational parameters

    Modeling of the vibrations assisted drilling process : taking into account the Workpiece-Tool-Machine environment.

    No full text
    Le perçage assisté par vibrations est un procédé assurant la maîtrise dimensionnelle des copeaux pour gagner en fiabilité sur les opérations de perçage. L’ajout d’une oscillation axiale pilotée en amplitude et en fréquence introduit deux nouveaux paramètres à déterminer en adéquation avec les paramètres conventionnels que sont l’avance et la vitesse de coupe. Le paramétrage d’une telle opération n’est donc pas trivial. Afin de fournir un outil d’optimisation du paramétrage du procédé, une nouvelle modélisation prenant en compte l’environnement « Pièce-Outil-Machine » est proposée. L’intégration de la géométrie de l’outil, des spécificités des interactions entre l’Outil et la Matière, et du comportement dynamique de la Machine permet s’adapter aux conditions de mise en oeuvre du procédé. Une méthode d’identification dissociée des éléments de l’environnement « Pièce-Outil-Machine » permet de caractériser les spécificités de chacun de ces éléments. Cette modélisation est validée par une campagne d’essai. La modèle développé dans ces travaux permet donc de prédire le comportement du procédé en vue d’une optimisation des paramètres opératoires.Vibrations assisted drilling is a process which ensures chip shape control in order to increase reliability during drilling operations. The adding of axial oscillation, controlled with amplitude and frequency, introduce two new parameters which must determinate according to the conventional parameters (feed and speed rotation). The optimal setting of vibrations assisted drilling is not obvious. To provide an optimization-tool of the process, a new model which take into account the “Tool-Workpiece-Machine” environment, is proposed. Drill geometry, Tool-Workpiece interactions and dynamic behavior of the Machine are incorporated in the model. Tis specificity allows adjusting behavior of the process with the case of application. An identification methodology is presented to characterize the environment. Simulation’s results and experimental results are compared to validate the model. This model thus allows predicting process behavior in order to optimize the operational parameters

    Production de gluonia dans les collisios de haute energie

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    SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : T 82745 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
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