WorldWideScience

Sample records for acier faiblement allie

  1. Influence des inclusions sur la rupture d'un acier faiblement allié

    Hausild, P.; Berdin, C.; Bompard, P.; Prioul, C.

    2003-03-01

    L'étude de la rupture d'un acier faiblement allié dans le domaine de la transition ductile fragile a permis de mettre en évidence la présence croissante, avec la température de sollicitation, d'amas d'inclusions de seconde phase sur les surfaces de rupture. On montre, à l'aide de modélisations par éléments finis, que ces amas jouent néanmoins un rôle mineur dans le déclenchement du clivage. En revanche, leur influence sur la propagation de la rupture ductile est importante. On peut alors expliquer l'anisotropie de la résilience en prenant en compte la géométrie des inclusions et leur répartition spatiale.

  2. DIAGRAMME TRC ET STRUCTURES DE TREMPE ET DE REVENU D'UN ACIER FAIBLEMENT ALLIE AU MANGANESE-CHROME

    Z LAROUK

    2008-06-01

    Full Text Available Cette étude concerne un acier faiblement allié au manganèse et chrome. L’utilisation principale de cet acier est la fabrication des tubes sans soudure, employés pour le forage ou le transport pétrolier. Les tubes traités thermiquement doivent supporter d’importantes contraintes de tension et de compression, sans risque de rupture. Les tubes trempés à l’eau souffrent d’une hétérogénéité structurale impliquant une diminution de dureté à la surface interne. Le but de cette étude est de déterminer les structures de l’acier après différents types de traitements, au cours de refroidissement continus dans les conditions industrielles de trempe (930°C et de revenu (670°C. Les résultats montrent que la vitesse critique de trempe est de 50°C/sec et, pour éviter la formation de la ferrite, une vitesse plus grande que 12°C/sec est nécessaire. Cet acier a une bonne trempabilité (11mm. La décroissance de la dureté de la martensite revenue est remarquable lorsque la température atteint 600°C.

  3. Corrosion of low Si-alloyed steels in aqueous solution at 90 deg. C. Inhibitive action of silicates; Corrosion d'aciers faiblement allies au silicium en solution aqueuse a 90 deg. C. Action inhibitrice des silicates

    Giordana, S

    2002-02-01

    Low-Si alloyed steels, with Si content ranging from 0.25 to 3.2 wt%, as potential candidate materials for high-level nuclear waste disposal containers, have been studied four the point of view of their corrosion behaviour at 90 deg C in an aqueous solution simulating groundwater (0.1 M NaCl borate-buffered solution with a pH of 8.5) both in reducing and in aerated conditions. The influence of silicate addition to the solution is examined so as to represent the silicon of groundwater, coming from the clay dissolution. When no silicate was added to the solution, silicon as an alloying element was proved to degrade in the first moments the steel ability to passivate. For longer immersion times, protective effects developed most efficiently on the steel containing 3.2 wt% silicon both in reducing an in aerating conditions, Infrared spectroscopy, EDSX, XRD and Raman microprobe were applied to characterise the oxide layer composition, which was found to be a mixture of magnetite and maghemite. In the presence of silicate in the solution, clay-like iron silicates appeared in the corrosion layer. Electrochemical tests results show that adding silicate into solution resulted in increasing the steel ability to passivate. In the short term, the inhibiting effect of silicate was confirmed by mass loss tests, but the tendency was inverse in the long term. Silicate iron layers were eventually less protective than the magnetite layers formed in the absence of silicate. (author)

  4. ``Global and local approaches of fracture in the ductile to brittle regime of a low alloy steel``; ``Approches globale et locale de la rupture dans le domaine de transition fragile-ductile d`un acier faiblement allie``

    Renevey, S

    1998-12-31

    The study is a contribution to the prediction of flow fracture toughness of low alloy steel and to a better knowledge of fracture behavior in the ductile to brittle transition region. Experiments were performed on a nozzle cut-off from a pressurized water reactor vessel made of steels A508C13 type steel. Axisymmetrical notched specimens were tested to study the fracture onset in a volume element while pre-cracked specimens were used to investigate cleavage fracture after stable crack growth. Systematic observations of fracture surfaces showed manganese sulfide inclusions (MnS) at cleavage sites or in the vicinity. The experimental results were used for modelling by the local approach to fracture. In a volume element the fracture is described by an original probabilistic model. This model is based on volume fraction distributions of MnS inclusions gathered in clusters and on the assumption of a competition without interaction between ductile and cleavage fracture modes. This model was applied to pre-cracked specimens (CT specimens). It is able to describe the scatter in the toughness after a small stable crack growth if a temperature effect on the cleavage stress is assumed. So, the modelling is able to give a lower bound of fracture toughness as a function of temperature. (author) 100 refs.

  5. Initiation of cleavage in a low alloy steel: effect of a ductile damage localized around inclusions; Declenchement du clivage dans un acier faiblement allie: role de l'endommagement ductile localise autour des inclusions

    Carassou, S

    2000-07-01

    The fracture mechanism in a low alloy steel, used in the pressurised water reactor vessel, has been studied in the ductile to brittle transition temperature range. We used the local approach of fracture in conjunction with both fractographic observations and numerical simulations. Previous studies suggested the onset of cleavage to be favoured by the presence of nearby manganese sulphide (MnS) clusters: the ductile damaged zone localised inside a cluster increases the stress around it, and so contribute to the triggering of cleavage due to nearby classical sites, like carbides. The experimental study of size dependence and anisotropy on the global fracture behaviour, together with fractographic observations, give here the proof of the influence of MnS clusters on the onset of cleavage in this steel. Fracture behaviour of pre-cracked specimens tested in the transition regime has then been simulated, by three dimensional finite element method computations. Ductile tearing process preceding the cleavage onset at those temperatures regime was well reproduced by the Rousselier's model. Failure probabilities, related to given stress states, has been given by post-processor calculations, using a probabilistic model based on the specific cleavage fracture process. Fracture toughness scatter of the steel, tested in the transition regime, is then well reproduced by those calculations. However, the critical cleavage stress of an elementary volume, that scales for the fracture process, is still assumed to be temperature dependant. Numerical simulations of the local fracture process suggest that this temperature effect can partly be explained by the temperature dependant decrease of the stress amplification due to the MnS clusters. (author)

  6. The use of slightly alloyed uranium as fuel: its influence on the dissolution and other stages of treatment; Emploi de l'uranium faiblement allie comme combustible: son incidence sur la dissolution et les autres phases du retraitement

    Faugeras, P.; Leroy, P.; Lheureux, C. [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1959-07-01

    This report deals chiefly with the treatment of binary alloys (UAI, UMo, UZr, UCr, USi) with a low concentration of the additional element ({<=}2 per cent). The investigation was pursued with a view to the continued utilisation, with a minimum of modification, of the existing plants for treatment of non-alloyed irradiated uranium. In the first part, the usual process for the treatment of irradiated uranium by solvent extraction is briefly recalled. The second part is devoted to a study of the selective dissolution of the canning around certain of these alloys. The third part gives the behaviour of these different alloys at various phases of the usual treatment: a) dissolution; b) extractions; c) final treatment of fission products; d) final purification of plutonium. To conclude, possible alloys are classed as a function of their repercussions on the normal treatment. (author) [French] Il s'agit surtout du traitement d'alliages binaires (UAI, UMo, UZr, UCr, USi) a faible teneur en element etranger ({<=}2 pour cent). L'etude a ete conduite en vue d'utiliser un minimum de modifications les usines de traitement d'uranium irradie non allie. Dans une premiere partie, nous rappelons brievement le procede habituel de traitement de l'uranium irradie par extraction au solvant. La deuxieme partie est consacree a l'etude de la dissolution selective de la gaine entourant certains de ces alliages. La troisieme partie donne le comportement de ces differents alliages au cours des phases du traitement habituel: a) dissolution; b) extractions; c) traitement final des produits de fission; d) purification finale du plutonium. Enfin, en conclusion, nous etablirons un classement des alliages possibles en fonction des repercussions sur le traitement normal. (auteur)

  7. Intergranular brittle fracture of a low alloy steel induced by grain boundary segregation of impurities: influence of the microstructure; Rupture intergranulaire fragile d'un acier faiblement allie induite par la segregation d'impuretes aux joints de grains: influence de la microstructure

    Raoul, St

    1999-07-01

    The study contributes to improve the comprehension of intergranular embrittlement induced by the phosphorus segregation along prior austenitic grain boundaries of low alloy steels used in pressurized power reactor vessel. A part of this study was performed using a A533 steel which contains chemical fluctuations (ghost lines) with two intensities. Axi-symmetrically notched specimens were tested and intergranular brittle de-cohesions were observed in the ghost lines. The fracture initiation sites observed on fracture surfaces were identified as MnS inclusions. A bimodal statistic obtained in a probabilistic model of the fracture is explained by the double population of ghost lines' intensities. A metallurgical study was performed on the same class of steel by studying the influence of the microstructure on the susceptibility to temper embrittlement. Brittle fracture properties of such microstructures obtained by dilatometric experiments were tested on sub-sized specimens to measure the V-notched fracture toughness. Fraction areas of brittle fracture modes were determined on surface fractures. A transition of the fracture mode with the microstructure is observed. It is shown that tempered microstructures of martensite and lower bainite are more susceptible to intergranular embrittlement than tempered upper bainitic microstructure. The intergranular fracture is the most brittle mode. The analysis of crystalline mis-orientations shows a grain boundary structure appreciably more coherent for tempered microstructures of martensite and lower bainite. The higher density of randomgrain boundaries is susceptible to drag the phosphorus in the upper bainitic matrix and to make the quantity of free phosphorus decreasing. Microstructure observations show a difference in the size and the spatial distribution of carbides, essentially cementite, between tempered martensite and upper bainite. It can explain the bigger susceptibility of this last microstructure to cleavage mode. (author)

  8. Experimental and numerical studies of the effect of plasticity mechanisms on the brittle rupture by cleavage in low alloy steels; Etudes experimentale et numerique de l'effet des mecanismes de plasticite sur la rupture fragile par clivage dans les aciers faiblement allies

    Libert, M

    2007-09-15

    It is indispensable to guarantee the integrity of PWR reactor vessels during an accidental running: in this context, the understanding and the modelling of the mechanisms of brittle rupture of steels are decisive elements of the complicated estimation of the service life of reactor vessels. The models of local approach of rupture by cleavage are one of the main tools of anticipation of the tensile strength of low alloy steels. In this work, the effect of the stresses heterogeneities in a local criteria of initiation of cleavage has been taken into account. The results of the microstructure calculations are used for proposing a statistical description of the local stresses distribution evolution. This statistical approach allows to propose a local approach model of the rupture depending both of the mechanical heterogeneities and of the sizes distributions of the defects. The behaviour of the material and its evolution are characterized at the microscopic and macroscopic scales in the temperature range [25 C, -196 C]. Simple tensile tests, velocity and temperature rises tests and toughness tests have been carried out. A micro-mechanical behaviour model describing the plastic behaviour below the transition temperature T{sub a} has been proposed. The behaviour law is based on the deformation mechanisms described in bibliography and identified by an inverse method from mechanical tests. The TEM observations and the characterization of the behaviour thermally activated allow to determine several parameters of the model. Simulations are carried out in order to model the main stress distributions {sigma}{sub 1} in two bainite microstructures corresponding to the elementary volume of the local approach of the rupture. The temperature and the triaxiality effects on the evolutions of the heterogeneities is characterized. A distribution function describing the distribution of the local values of {sigma}{sub 1} in terms of the main and equivalent mean stresses {sigma}{sub 1} and {sigma}{sub m} in the microstructure is proposed. This function is used for formulating a model of rupture local approach integrating the distribution of the critical defects sizes and the distributions of {sigma}{sub 1}. It is shown that in some cases, the dispersion of the local stresses is sufficient to explain the dispersions of the rupture stresses at the scale of the elementary volume. The dispersions of the rupture stresses are in agreement with those given by the Beremin model. The taken into account of the mechanical heterogeneities allows to introduce a dependency of the rupture probability in terms of temperature, of deformation and of triaxiality. (O.M.)

  9. Astronomy Allies

    Flewelling, Heather; Alatalo, Katherine A.

    2017-01-01

    Imagine you are a grad student, at your first conference, and a prominent senior scientist shows interest in your work, and he makes things get way too personal? What would you do? Would you report it? Or would you decide, after a few other instances of harassment, that maybe you shouldn't pursue astronomy? Harassment is under-reported, the policies can be difficult to understand or hard to find, and it can be very intimidating as a young scientist to report it to the proper individuals. The Astronomy Allies Program is designed to help you with these sorts of problems. We are a group of volunteers that will help by doing the following: provide safe walks home during the conference, someone to talk to confidentially, as an intervener, as a resource to report harassment. The Allies are a diverse group of scientists committed to acting as mentors, advocates, and liaisons. The Winter 2015 AAS meeting was the first meeting that had Astronomy Allies, and Astronomy Allies provided a website for information, as well as a twitter, email, and phone number for anyone who needs our help or would like more information. We posted about the Astronomy Allies on the Women In Astronomy blog, and this program resonates with many people: either they want to help, or they have experienced harassment in the past and don't want to see it in the future. Harassment may not happen to most conference participants, but it's wrong, it's against the AAS anti-harassment policy ( http://aas.org/policies/anti-harassment-policy ), it can be very damaging, and if it happens to even one person, that is unacceptable. We intend to improve the culture at conferences to make it so that harassers feel they can't get away with their unprofessional behavior.

  10. Les aciers inoxydables dans les fixations

    CETIM

    2010-01-01

    Cet ouvrage, qui fait la synthèse de plusieurs travaux menés par le Cetim, propose une vue d'ensemble sur les aciers inoxydables utilisés pour les fixations. Au sommaire : les normes EN, ISO et ATSM qui s'y rapportent , les désignations symboliques , les nuances et caractéristiques mécaniques , les différentes formes de corrosion, les méthodes pour les détecter , les règles du métier , les mises en oeuvre. L'ouvrage comprend plusieurs fiches matériaux et des tableaux qui présentent les équivalences entre les désignations.

  11. Comportement sous polarisation d'un acier dans des solutions simulant des bétons (sans chlorures ) : Etude 2003

    Bouteiller, Véronique

    2004-01-01

    Un acier de précontrainte a été étudié sous polarisation dans des solutions simulant des bétons (sans chlorures). L'acier a été étudié sous quatre états de surface différents (acier tel quel, acier poli, acier rouillé artificiellement et acier rouillé naturellement dans trois solutions différentes simulant des bétons "sain", légèrement carbonaté et "carbonaté". Les courbes potentiodynamiques montrent que la formation d'oxydes et/ou le dégagement d'hydrogène dépendent de la surface de l'acier ...

  12. Allies in the struggle.

    Draughn, Tricia; Elkins, Becki; Roy, Rakhi

    2002-10-01

    SUMMARY Providing a community that is committed to standards, diversity, and enhancement of the academic environment is often difficult. Offering an Allies or Safe Zone program is among of the first steps an institution can take to achieve a community that embraces diversity and creates a learning environment that is accepting of lesbian, gay, bisexual and transgendered individuals. While there are many opportunities in institutional group settings to address these issues, they often go either unnoticed or untapped. How can being an ally impact the greater institutional environment? This paper will discuss the campus environment for LGBT students, examine existing Allies and Safe Zone programs, and offer a framework to assist program coordinators and participants in establishing comprehensive programs to change the campus climate and develop institutional environments that are gay affirmative.

  13. Study of clustering point defects under irradiation in dilute iron alloys; Etude de la formation sous irradiation des amas de defauts ponctuels dans les alliages ferritiques faiblement allies

    Duong-Hardouin Duparc, T.H.A

    1998-12-31

    In low copper steels for nuclear reactor pressure vessel, point defect clustering plays an important role in hardening. These clusters are very small and invisible by transmission electron microscopy. In order to study the hardening component which results from the clustering of freely migrating point defects, we irradiated in a high voltage electron microscope Fe, the FeCu{sub 0.13%}, FeP{sub 0.015%} and FeN{sub 33ppm} alloys and the complex FeMn{sub 1.5%}Ni{sub 0.8%}Cu{sub 0.13%}P{sub 0.01%} alloy the composition of which is close to the matrix of pressure vessel steel. We studied the nucleation of dislocation loops and their growth velocity. The observations and the analyses have shown that in the complex model alloy, the interstitial dislocation loops are smaller and their density is more important than for the others alloys. The diffusion coefficients of interstitials and vacancies are obtained with the help of a simplified model. The densities of dislocation loops and their growth velocities obtained experimentally are reproduced by means of a cluster dynamics model we have developed. This is achieved self-consistently by using as a first trial the approximated coefficients obtained with the simplified model. The results of calculations have shown that the binding energy of di-interstitials must be very important in the binary iron alloys and only 0.95 eV in iron. Copper, nitrogen and phosphorus stabilize di-interstitials in iron. Finally the distribution of interstitial loops at 290 deg C and at 2.10{sup -9} dpa/s is calculated with the diffusion coefficient of point defects adjusted in FeCu. A distribution of small loops appears which gives an increase of hardening estimated to 10 Hv instead of 33 Hv experimentally observed. This low value can be improved by assuming in agreement with molecular dynamics simulations that a little fraction of di-interstitials is created at 2.5 MeV. (author) 111 refs.

  14. Soudage des aciers pour application mécanique

    Deveaux, Dominique

    2016-01-01

    Ce guide détermine les bonnes pratiques pour comprendre les risques d’une forme d’assemblage multimatériaux : celui par soudage de nuances à forte teneur en carbone avec des éléments en acier de construction. Dans un premier temps, le rapport passe en revue l’examen des avaries sur des assemblages soudés pour l’application mécanique mettant en cause les aciers. Fissuration par fatigue, rupture fragile, rupture ductile, fissuration à chaud ou à froid sont autant de causes qui seront analysées. Dans un deuxième temps, il se concentre sur la conception des joints soudés. Du choix des nuances à la tenue vis-à-vis de la rupture fragile en passant par l’analyse en fatigue des assemblages soudés, c’est l’ensemble de la problématique qui est pris en compte.

  15. Caractérisation physique et mécanique de l'acier 4140 nitruré et implanté

    Benarioua, Y.; Chicot, D.; Lesage, J.

    2005-05-01

    La nitruration est un procédé thermochimique destiné à améliorer les propriétés chimiques et mécaniques des aciers et des fontes. Les procédés les plus courant sont la nitruration gazeuse, la nitruration en bain de sels et la nitruration ionique par plasma. Cette dernière présente certains avantages par rapport aux deux précédentes, elle est moins polluante, consomme moins d'énergie et permet un traitement local. De manière générale, quel que soit le procédé utilisé, le processus de nitruration des aciers se caractérise par la diffusion d'azote à partir de la surface vers le cœur du matériau et par la formation d'une couche de combinaison superficielle après une période d'incubation. Si le temps du traitement est suffisamment long, on constate un ralentissement de la croissance de la couche de combinaison alors que la diffusion de l'azote se poursuivre vers le cœur de la pièce en formant une solution solide d'insertion dans la nitroferrite ou des précipités de nitrures ou de carbonitrures d'éléments alliés. Pour ce travail et en vue d'améliorer le comportement mécanique des échantillons, les aciers nitrurés ioniquement pour deux taux d'activation ont subi un traitement supplémentaire d'implantation d'ions d'azote. La caractérisation, tant du point de vue microstructurale que mécanique, des couches obtenues à partir de la nitruration ionique avec ou sans implantation ionique a été effectué et les moyens utilisés dans cette étude sont la microdureté, diffraction de rayons X, microscopies optique et électronique à balayage.

  16. Turning gadflies into allies.

    Yaziji, Michael

    2004-02-01

    Multinational companies are the driving force behind globalization, but they are also the source of many of its most painful consequences, including currency crises, cross-border pollution, and overfishing. These problems remain unsolved because they are beyond the scope of individual governments; transnational organizations have also proved unequal to the task. Nonprofit, nongovernmental organizations have leaped into the breach. To force policy changes, they have seized on all forms of modern persuasion to influence public sentiment toward global traders, manufacturers, and investors. By partnering with NGOs instead of opposing them, companies can avoid costly conflict and can use NGOs' assets to gain competitive advantage. So far, however, most companies have proved ill equipped to deal with NGOs. Large companies know how to compete on the basis of product attributes and price. But NGO attacks focus on production methods and their spillover effects, which are often noneconomic. Similarly, NGOs are able to convert companies' standard competitive strengths--such as size and wide market awareness of their brands--into liabilities. That's because the wealthier and better known a company is, the juicier the target it makes. Emboldened by their successes, NGOs continue to take on new causes. By partnering with NGOs instead of reflexively opposing them, companies could draw on NGOs' key strengths--legitimacy, awareness of social forces, distinct networks, and specialized technical expertise--which most companies could use more of. And with NGOs as allies and guides, companies should also be able to accelerate innovation, foresee shifts in demand, shape legislation affecting them, and, in effect, set technical and regulatory standards for their industries.

  17. Cartel de l'acier : Des sanctions surprenantes pour une méthodologie exemplaire

    Boy, Laurence

    2010-01-01

    National audience; Competition authorities and Cour de cassation bases in Iron Cartel case.; analyse détaillée de la motivation de la condamnation du Cartel de l'acier en 2010 par les autorités de concurrence.

  18. ETUDE DU COMPORTEMENT MECANIQUE DES ACIERS HYPEREUTECTOIDES DANS LE DOMAINE DE TEMPERATURE INTERCRITIQUE DYNAMIQUE

    R GHERIANI

    2001-06-01

    Full Text Available L'étude que nous présentons contribue à une meilleure compréhension de l'influence de la vitesse de déformation et de la température sur le comportement mécanique des aciers hypereutectoïdes dans le domaine de température intercritique dynamique. Les courbes expérimentales obtenues en torsion présentent un intérêt notable dans la mesure où elles permettent de caractériser le comportement mécanique de l'acier 100C6; de plus, elles fournissent  des informations précieuses sur la capacité maximale de déformation de l'alliage. Les essais de torsion, menés jusqu'à rupture des éprouvettes, permettent d'effectuer un classement des matériaux selon leur ductilité. Les résultats obtenus sur l'acier 100C6 ont permis de préciser le comportement mécanique à tiède  de cet acier. Les aciers hypoeutectoïdes présentent, dans les domaines de température compris entre Ac1 et Ac3 en condition dynamique, une capacité de déformation élevée résultant de l'évolution, en cours de déformation, des phases a et g et de leurs mécanismes d'adoucissement. Nous nous sommes alors posé la question: quel est le comportement d'un acier hypereutectoïde, donc ne présentant  pas de domaine biphasé (a + g à l'équilibre, lorsqu'il est déformé à une température supérieure à Ac1?

  19. Influence de la nuance d'acier des roues ferroviaires en Fatigue de Contact de Roulement

    Langueh Amavi

    2013-11-01

    Full Text Available Cet article propose une méthodologie de prédiction de la durée de vie des roues ferroviaires permettant de prendre en compte les sollicitations locales via la géométrie réelle du contact roue/rail, le comportement inélastique du matériau (acier et d'intégrer un critère de fatigue. Le contexte industriel, d'étudier l'influence de la nuance d'acier sur la durabilité de la roue. Les principales étapes de l'approche sont l'identification du comportement des matériaux, la détermination des champs de contrainte-déformation stabilisés et l'application d'un critère de fatigue. L'algorithme stationnaire est utilisé pour déterminer les contraintes et déformations suivant les conditions d'exploitation. Trois aciers ont été étudiés en analysant leurs réponses mécaniques, leurs limites d'adaptation et leurs durées de vie moyenne.

  20. Allied health professionals with 2020 vision.

    Miller, Thomas W; Gallicchio, Vincent S

    2007-01-01

    Allied health professionals in all disciplines must be visionary as they address education, training, and health care delivery in the next decade. Examined herein are forces of change in education, training, health care, the recognition of essential leadership styles, and the paradigm shifts facing the allied health profession in the health care arena. Some visionary directions are offered for allied health professionals to consider as health policy and clinical agendas emerge toward the year 2020.

  1. How Allies Collaborate; The NATO Training Experience.

    Vandevanter, E., Jr.

    A survey was made of North Atlantic Treaty Organization (NATO) coordination of training programs for allied military forces and its implications about collaboration among allies in peacetime. Three types of training were analyzed: (1) higher training, or the coordination of large military formations; (2) unit training of smaller teams; (3)…

  2. SOUDAGE D'ACIER Z 2 CN 18-10 PAR LASER CO2

    Petesch, B.; Sakout, A.; LAURENT M.; M. Robin

    1987-01-01

    Le soudage d'un acier Z 2 CN 18 par faisceau laser a été étudié. L'influence principaux paramètres vitesse, puissance, focalisation a été examinée. Les moyens classiques de caractérisation des soudures ont été utilisées : observations métallographiques forme de la zone fondue, quantité de porosités et énergie absorbée. Le maximum de pénétration correspond au maximum d'énergie absorbée.

  3. Men as Allies Against Sexism

    Sezgin Cihangir

    2014-06-01

    Full Text Available Sexism is often expressed in subtle and ambiguous ways, causing targets to doubt their own capabilities or to show stereotype-confirming behavior. This research examines whether the self-confidence and stereotype (dis-confirming behavior of targets of sexism can be bolstered when other male versus female sources suggest that sexism may have played a role. Both Study 1 (N = 78 and Study 2 (N = 90 show that a suggestion of sexism has more beneficial effects when it is made by male sources than when it is made by female sources. When males suggested that sexism had taken place, targets reported more self-confidence (less self-handicapping and higher personal performance state self-esteem and showed less stereotype confirmation (less self-stereotyping and better task performance than when sexism was suggested by a female source. Study 2 additionally revealed that targets are more likely to file a complaint when men suggest that sexism took place than when this same suggestion was made by women. These results indicate that men can constitute important allies against sexism if they speak out when sexist treatment takes place.

  4. Etude d'un revêtement d'acier inoxydable Z 2 CND 18-12 réalisé sur un acier doux, sous irradiation laser avec injection de poudre coaxiale au faisceau

    FOUQUET, F; Sallamand, P.; Dierickx, P.; Bonne, D.; Millet, J.

    1994-01-01

    Le présent travail traite du dépôt d'acier inoxydable austénitique de type AISI 316 L sur acier doux par projection de poudre sous faisceau laser et de la caractérisation du revêtement élaboré. Les revêtements obtenus par cette technique sont de bonne qualité, exempts de fissures, avec peu de porosités et parfaitement adhérents au substrat. Leur microstructure très fine est dendritique ou cellulaire. La structure est apparue majoritairement austénitique, mais avec présence non négligeable de ...

  5. Etude de la corrosion caverneuse d'un acier inoxydable martensitique : utilisation d'une cellule à couche mince

    Joly Marcelin, Sabrina

    2012-01-01

    Les aciers inoxydables martensitiques sont utilisés dans l'industrie aéronautique où de hautes propriétés mécaniques sont requises. Cependant, dû à leur faible teneur en chrome, ils sont relativement sensibles à la corrosion localisée et particulièrement à la corrosion caverneuse qui se développe en milieu confiné. Tout d'abord, le comportement électrochimique de l'acier inoxydable martensitique X12CrNiMoV12-3 a été étudié dans une solution neutre et chlorurée (NaCl 0,1 M + Na2SO4 0,04 M) en ...

  6. Effets du titane et du niobium sur l'oxydation à 950circC d'aciers ferritiques

    Issartel, C.; Buscail, H.; Caudron, E.; Cueff, R.; Riffard, F.; El Messki, S.; Karimi, N.; Antoni, L.

    2004-11-01

    Nous avons étudié l'effet du titane et du niobium sur l'oxydation à 950circC d'un acier Fe-Cr chrominoformeur. La DRX in situ montre que le titane semble s'oxyder en formant Cr{2}TiO{5} et TiO{2} qui contribuent à une augmentation de la prise de masse des échantillons. Une partie du titane issu de ces oxydes semble doper la couche de chromine. Sa présence augmente la concentration en lacunes cationiques dans la chromine et augmente donc la diffusion du chrome dans la couche. Nous avons aussi montré que le niobium n'a pas d'influence sur l'oxydation de ce type d'acier à 950circC.

  7. Traitement superficiel d'acier par laser excimère

    Pereira, A.; Cros, A.; Delaporte, Ph.; Marine, W.; Sentis, M.

    2003-06-01

    Motivée par des nécessités économiques et environnementales, l'industrie est amenée à développer de nouveaux procédés propres, notamment pour les applications concernant la préparation de surface (nettoyage, décapage...). Dans ce domaine, l'utilisation du laser excinière présente de nombreux avantages. En effet, en raison d'un temps d'interaction de courte durée (ns), suivi d'un échauffement et d'un refroidissement rapide de la zone irradiée sur une profondeur très fine (μm), il est possible de modifier localement les propriétés physico-chimiques d'une surface sans changer les propriétés intrinsèques du matériau. Le but de nos travaux a consisté en l'étude des effets d'un traitement par laser excimère (XeCI) sur les propriétés chimiques (XPS et AES), structurales (XRD et GIXRD) et morphologiques (MEB) de surface d'acier. Outre le nettoyage de la surface, les analyses chimiques réalisées sur de l'acier ont mis en évidence pour des densités d'énergie importantes la formation d'une couche de Fe2O3 au détriment de FeOOH. Les observations MEB ont révélé la création de structures sphériques nanométriques. Ce traitement permet notamment d'améliorer la tenue à la corrosion de la surface.

  8. Victor Legley: some notes on his thoughts and Cathédrale d’acier

    de Roeck, Ronald

    2010-12-01

    Full Text Available The article proposes to extend the knowledge of the figure and work of Victor Legley. It offers some notes about his life, studies and professional activities. It informs about his activities as a musical philosopher, and makes some of his thoughts known about contemporary composition, music’s social function, the composer’s role, and the relations between composer, interpreter, critic and management, today. The major part of the article is dedicated to his compositions. La Cathédrale d’acier, opus 52, from 1958, has been chosen for an analytical research on his intense thematic work, typical for his production, and also to establish the general characteristics of this composition, representative of much of his work. Finally, we present some conclusions on the importance of his ideas and his production as a composerEl artículo propone ampliar el conocimiento de la figura y obra de Victor Legley. Empieza con unos apuntes sobre su vida, sus estudios y actividades profesionales. Destaca sus actividades como pensador de la música, y da a conocer algunas de sus ideas sobre la composición contemporánea, la función social de la música, el papel del compositor, el nivel estético en nuestros días. Buena parte del artículo se centra en su producción compositiva. Se ha escogido La Cathédrale d’acier, opus 52, de 1958, para hacer una investigación analítica del intenso trabajo temático, que es propio de su obra, y para establecer la características generales de esta composición, representativa de buena parte de su obra. Finalmente, se presentan unas conclusiones sobre la importancia de las ideas y la producción compositiva de Legley.

  9. Lessons of Allied Interoperability: A Portent for the Future

    1978-08-10

    operating in their area of responsibility. Transportation coordination and movements control proved a major logistical headache in North Africa and Italy...Allied operations, coalition warfare, allied interoperobility, standardizatlon. rationliaaton, laisou, logistica , comand and control. doctrine, training

  10. 22 CFR 120.32 - Major non-NATO ally.

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Major non-NATO ally. 120.32 Section 120.32... § 120.32 Major non-NATO ally. Major non-NATO ally means a country that is designated in accordance with § 517 of the Foreign Assistance Act of 1961 (22 U.S.C. 2321k) as a major non-NATO ally for purposes...

  11. Predictors of Success for Allied Health Students.

    Jensen, Steven C.

    1989-01-01

    A study of 424 allied health students (259 dental hygiene, 104 radiologic technology, and 61 respiratory therapy) found that the greater predictors of their academic success were the natural science subscore on the American College Test (ACT), high school grade point average, and class rank, age, and composite ACT score. (SK)

  12. Strategies for Engaging Men as Anti-Violence Allies: Implications for Ally Movements

    Erin Casey

    2010-11-01

    Full Text Available As ally movements become an increasingly prevalent element of social justice efforts, research is needed that illuminates effective strategies to initially engage members of privileged social groups in anti-oppression work. This study presents descriptive findings regarding ally engagement strategies and barriers from a qualitative study of a particular ally movement – male anti-violence against women activism. Twenty-seven men who recently initiated involvement in an organization or event dedicated to ending sexual or domestic violence were interviewed regarding their perceptions of effective approaches to reaching and engaging other men in anti-violence work. Participants viewed tailored engagement strategies that tap into existing social networks, that allow men to see themselves reflected in anti-violence movements, and that help men make personal, emotional connections to the issue of violence as most effective. Implications for engaging men in the project of ending violence against women, and for ally movements more generally are discussed.

  13. Stress corrosion of unalloyed steels in geological storage conditions; Corrosion sous contrainte des aciers non allies dans les conditions du stockage geologique

    Didot, A.; Herms, E.; Bataillon, C.; Chene, J. [CEA Saclay, Dept. de Physico-Chimie (DEN/DANS/DPC/SCCME/LECA), 91 - Gif sur Yvette (France); Crusset, D. [Agence Nationale pour la Gestion des Dechets Radioactifs (ANDRA), 92 - Chatenay Malabry (France)

    2007-07-01

    The concept retained for high level and years living radioactive waste disposal is the underground storage. It is then necessary to know the behaviour in time (about 10000 years) of the different constituent elements of the containment. The storage site chosen is the Bures' ones, presenting a clay formation at 600 m of depth. Each compartment is separated of a sufficient distance in order to profit of the thermal dispersion effect in the rock for optimizing the cooling of the package. In this work, has been used an unalloyed steel sur-container. The aim is to understand the resistance of the material under corrosion and loading, and particularly the stress corrosion which is a particular case of cracking assisted by environment. The material studied is a weld of two unalloyed steels obtained by electron beam. Slow traction tests have been carried out in an autoclave in the following experimental conditions: interstitial water in equilibrium with a helium-CO{sub 2} mixture 5.4 per thousand under 50 bar and at a temperature of 90 C. The results show an influence of the hydrogen corrosion on the mechanical behaviour of the material and particularly a decrease of the size of the reduction in area, which is practically unexisting in the case of the melted zone. These results are explained into details. (O.M.)

  14. Hydrogen diffusion in Al-Li alloys

    Anyalebechi, P. N.

    1990-08-01

    The diffusion coefficients of hydrogen in binary Al-Li alloys containing 1,2, and 3 wt pct Li have been determined from desorption curves of samples saturated with hydrogen at 473 to 873 K. Within this temperature range, the diffusivity of hydrogen in the binary Al-Li alloys investigated has an Arrhenius-type temperature dependence and follows the equation of the general form D = DT) where D 0exp(-Q/R is the diffusion coefficient (m2/s), D 0 is the preexponential or frequency factor (m2/s), R is the gas constant (J/K mol), Q is the activation energy (J/mol), and T is absolute temperature (K). The rate of diffusion of hydrogen in aluminum decreases with increase in lithium additions. This is provisionally attributed to the stronger local binding energy between hydrogen and lithium atoms in the aluminum metal lattice.

  15. Allis Prize Lecture: Gaseous Electronics Physics Inside

    Garscadden, Alan

    2002-10-01

    I was fortunate to enjoy the advice of K. G. Emeleus during my graduate studies and for many years afterwards. He introduced me to the papers of Will Allis and later I was privileged to correspond with Professor Allis. At this time I had moved from the Queens university environment to work at a large Air Force base. There I have worked with a lot of smart people, including several who also come to the GEC each year to be refreshed and calibrated. A personal overview is presented on a few of the many roles that atomic, molecular and optical physics, including gaseous electronics, play in programs of the Air Force Research Laboratory and subsequently on AF systems and operations. While there have been misses, overall there have been many successes with impacts that provide more effective systems, as recent experiences have demonstrated. Some example studies, involving primarily electron collision physics, successful and unsuccessful in being chosen for application, are discussed.

  16. AMED: The Allied and Complementary Medicine Database.

    Vardell, Emily

    2016-01-01

    AMED: The Allied and Complementary Medicine Database is a resource from the Health Care Information Service of the British Library. AMED offers access to complementary and alternative medicine topics, such as acupuncture, chiropractic, herbalism, homeopathy, hospice care, hypnosis, palliative care, physiotherapy, podiatry, and rehabilitation. This column features a sample search to demonstrate the type of information available within AMED. AMED is available through the EBSCOhost and OVID platforms.

  17. Etude de la microstructure d'un acier 316 titane apres vieillissement et apres irradiation aux neutrons

    Brun, G.; Le Naour, J.; Vouillon, M.

    1981-10-01

    La précipitation qui se produit lors de vieillissements de longue durée entre 450 et 700°C dans un acier 316 Ti soit hypertrempé soit écroui, a été étudiée en couplant les techniques de microscopic électronique et de microanalyse X. Pour les cas expérimentaux étudiés, les résultats obtenus montrent que la composition des carbures M 23C 6 et des phases σ, Laves et χ est peu sensible aux conditions de vieillissement et dépend également peu de l'état structural initial. Leur teneur en éléments principaux de l'alliage est d'ailleurs voisine de celle des phases précipitées dans l'acier non stabilisé. Excepté les carbures de type M 6C, toutes ces phases ont une teneur en nickel inférieure à celle de la matrice. Les premiers rérultats obtenus sur des matériaux irradiés aux neutrons montrent que la précipitation sous flux est différente de celle qui se produit dans l'acier vieilli. Les phases γ' et G ainsi que les carbures riches en nickel ont été observés. L'attention a été attirée sur le fait qu'il n'y a pas de corrélation simple entre la vitesse de gonflement et la teneuer résiduelle en nickel de la matrice.

  18. Suivi in situ de l'avancement du frittage d'une poudre d'acier

    Lame, O.; Bordère, S.; Denux, D.; Bouvard, D.

    2002-12-01

    Une manière simple de caractériser l'avancement du frittage d'une poudre est de suivre ses variations de densité relative. Cependant, pour les poudres d'acier préalablement compactées en matrice, la densité initiale est grande, par conséquent évolue peu lors du frittage. Au contraire, la microstructure et les propriétés du matériau évoluent beaucoup. Dans cette étude, l'avancement du frittage est suivi in situ au cours du frittage par deux caractéristiques physiques : la résistivité électrique et la viscosité. Les techniques innovantes développées pour ces mesures expérimentales sont présentées ainsi que l'intérêt des résultats pour la compréhension et la modélisation du frittage.

  19. Etude expérimentale et numérique de la propagation d'une fissure par fatigue dans un fil d'acier tréfilé entaillé.

    CHARTIER, Cédric

    2007-01-01

    L'objectif de ce stage est d'étudier la propagation d'une fissure au sein d'un fil d'acier et a pour objectif, d'une part, d'initier des fissures les plus représentatives et reproductibles possibles sur fil d'acier non corrodé et, d'autre part, d'étudier la propagation sous l'effet de la fatigue.

  20. Fissuration en relaxation des aciers inoxydables austénitiques au voisinage des soudures

    Auzoux, Q.; Allais, L.; Gourgues, A. F.; Pineau, A.

    2003-03-01

    Des fissures intergranulaires peuvent se développer au voisinage des soudures des aciers inoxydables austénitiques lorsqu'ils sont réchauffés dans le domaine de température compris entre 500^{circ}C et 700^{circ}C. A ces températures, les contraintes résiduelles post-soudage se relaxent par déformation viscoplastique. Il peut arriver que ces zones proches de la soudure soient tellement fragiles, qu'elles ne puissent accommoder cette faible déformation. Afin de préciser quelles peuvent être les modifications microstructurales qui conduisent à une telle fragilisation, on a examiné les microstructures de ces zones et révélé ainsi un écrouissage résiduel, responsable d'une forte élévation de la dureté. On a pu reproduire par hypertrempe puis laminage entre 400^{circ}C et 600^{circ}C une microstructure similaire. Des essais mécaniques (traction, fluage, relaxation, sur éprouvettes lisses et pré-fissurées) ont été réalisés à 550^{circ}C et à 600^{circ}C sur ces zones affectées simulées et sur un état de référence hypertrempé. Ils ont montré que l'écrouissage diminuait la ductilité dans le domaine de rupture intergranulaire, sans modifier qualitativement le mécanisme d'endommagement. Pendant la pré-déformation les incompatibilités de déformation entre grains conduiraient à l'existence de contraintes locales élevées qui favoriseraient la germination des cavités intergranulaires.

  1. TRANSFORMATION ISOTHERME D'UN ACIER A HAUTE RESISTANCE 40 CDV 13

    A BOUTEFNOUCHET

    2001-06-01

    Full Text Available L'étude dilatométrique du comportement de l'austénite en condition isotherme d'un acier ternaire, à haute résistance mécanique de nuance 40 CDV 13, nous a permis de tracer son diagramme TTT. L'austénitisation a été réalisée pendant 10 minutes à  qg = 950°C (utilisée dans  l'industrie. Les températures de maintien sont comprises entre Ac1 = 810°C et Ms  = 310°C. Dans ce diagramme TTT, on distingue deux domaines de transformation isotherme de l'austénite. Le domaine I (625°C £  qiso < Ac1 = 810°C dans lequel l'austénite se transforme en ferrite et en perlite, et le domaine II (325°C  £  qiso £ 475°C où l'austénite se transforme en bainite ou en ferrite probainitique. Ces transformations sont précédées pour toutes les températures de maintien isotherme d'une précipitation de carbures. En outre, ces deux domaines de transformation de l'austénite sont séparés par une large zone de stabilité de l'austénite comprise entre 500°C et 600°C. L'analyse approfondie des courbes dilatométriques enregistrées durant le maintien isotherme et le refroidissement final jusqu'à l'ambiante, nous a permis de déterminer qualitativement et quantitativement les phase mises en jeu par ces transformations isothermes de l'austénite.

  2. Queer & Ally Youth Involvement in the Fair Wisconsin Campaign

    Stiegler, Sam

    2008-01-01

    This article discusses the role and experience of queer youth and allies in the Fair Wisconsin campaign that fought against the marriage amendment to that state's constitution. It illustrates how LGBT and ally youth involvement can be incorporated into other organizations. Following an explanation of the campaign, are narratives of two…

  3. Diffusion of a quality improvement programme among allied health professionals.

    Sluijs, E.M.; Dekker, J.

    1999-01-01

    Objective: To assess the diffusion of a quality improvement (QI) programme among allied health professions in The Netherlands. Design: Descriptive study, based on a questionnaire distributed to allied health professionals; response rate, 63%. Settings and participants: All subsectors in health care

  4. Building an Interdisciplinary Faculty Team for Allied Health Gerontology Education.

    Glista, Sandra; Petersons, Maija

    2003-01-01

    An interdisciplinary team from various college allied health departments implemented Project AGE: Alliance for Gerontology Education to develop content to infuse in courses on the themes of age and culture, assistive technology, collaboration, and consumer health education. One goal was to foster interaction among allied health students to prepare…

  5. Theatre of Presence - Antero Alli's Paratheatrical ReSearch Lab

    Isar, Nicoletta

    the oppression, decadence and corruption that has crucified and buried the poetic Imagination" (Antero Alli) This paper will try to unveil one of Antero Alli's paratheatrical experiments in overcoming the death of ritual in theatre. Orphans of Delirium is an intense, living ritual experience, "fluid" in its...

  6. Influence de la composition chimique et de la microstructure sur le dégazage de l'hydrogène des aciers inoxydables austénitiques destinés à l'ultravide

    Reinert, Marie-Pierre

    Dans les installations métalliques sous ultravide, l'hydrogène est le principal constituant de l'atmosphère résiduelle. Le flux de dégazage d'une tôle en acier inoxydable austénitique, matériau fréquemment utilisé en technologie du vide, après un étuvage sous vide, est typiquement de quelques 10-12 Torr.1/cm2.s, et est constitué principalement d'hydrogène. Dans le cadre de cette étude, un appareillage de thermodésorption sous ultravide a été conçu et mis au point pour étudier les phénomènes d'adsorption, de diffusion et de piégeage de l'hydrogène résiduel dans les aciers inoxydables austénitiques. Différents aciers ont été étudiés: l'acier 316L (avec trois modes d'élaboration différents), l'acier 316LN et d'autres aciers stabilisés au titane ou au niobium. La microstructure et la couche d'oxyde de ces aciers ont été caractérisées à l'état de réception et pendant les cycles de thermodésorption. Pendant un cycle de thermodésorption, les principales espèces désorbées...

  7. [Citizens: allies of the health system].

    Venne, Michel

    2014-03-01

    Many international declarations recognize citizen participation as an important driver of success for health policy; however, in most countries the implementation of this principle has been delayed. Yet well-known phenomena, like ageing and incurred costs, should motivate decision makers to rely more on citizens and make them allies of the system, giving them power and responsibility. Citizens can first exercise this responsibility within the areas of prevention and health promotion. This responsibility then expands to include mutual assistance between community members. It is called upon in the definition of new social norms. It is recognized by the participation of citizens in health care decision-making bodies. Lastly, this responsibility applies when the time comes to choose which health services will be covered by the public system and which will be sent on to private insurers. The reasons to create a space for citizens are many. The methods to do it exist. What is needed is political willpower and means.

  8. Research culture in allied health: a systematic review.

    Borkowski, Donna; McKinstry, Carol; Cotchett, Matthew; Williams, Cylie; Haines, Terry

    2016-06-07

    Research evidence is required to guide optimal allied health practice and inform policymakers in primary health care. Factors that influence a positive research culture are not fully understood, and nor is the impact of a positive research culture on allied health professionals. The aim of this systematic review was to identify factors that affect allied health research culture and capacity. An extensive search of 11 databases was conducted in June 2015. Studies were included if they were published in English, had full-text availability and reported research findings relating to allied health professions. Study quality was evaluated using the McMaster Critical Review Forms. Fifteen studies were eligible for inclusion. A meta-analysis was not performed because of heterogeneity between studies. Allied health professionals perceive that their individual research skills are lower in comparison to their teams and organisation. Motivators for conducting research for allied health professionals include developing skills, increasing job satisfaction and career advancement. Barriers include a lack of time, limited research skills and other work roles taking priority. Multilayered strategies, such as collaborations with external partners and developing research leadership positions, aimed at addressing barriers and enablers, are important to enhance allied health research culture and capacity.

  9. First Principles Study of Al-Li Intermetallic Compounds

    Yu, Hai-li; Duan, Xiao-hui; Ma, Yong-jun; Zeng, Min

    2012-12-01

    The structural properties, heats of formation, elastic properties, and electronic structures of four compositions of binary Al-Li intermetallics, Al3Li, AlLi, Al2Li3, and Al4Li9, are analyzed in detail by using density functional theory. The calculated formation heats indicate a strong chemical interaction between Al and Li for all the Al-Li intermetallics. In particular, in the Li-rich Al-Li compounds, the thermodynamic stability of intermetallics linearly decreases with increasing concentration of Li. According to the computational single crystal elastic constants, all the four Al-Li intermetallic compounds considered here are mechanically stable. The polycrystalline elastic modulus and Poisson's ratio have been deduced by using Voigt, Reuss, and Hill approximations, and the calculated ratios of bulk modulus to shear modulus indicate that the four compositions of binary Al-Li intermetallics are brittle materials. With the increase of Li concentration, the bulk modulus of Al-Li intermetallics decreases in a linear manner.

  10. Évolution de la surface de plasticité sous chargement biaxial dans un acier inoxydable duplex

    Aubin, V.; Quaegebeur, P.; Degallaix, S.

    2002-12-01

    Nous proposons une méthodologie de mesure automatique de la surface de plasticité pendant des chargements cycliques biaxiaux. La surface de plasticité est mesurée de manière discrète avec un faible offset de déformation plastique (2 10^{-5}) et des paramètres de mesure optimisés. La méthode est appliquée à un acier inoxydable duplex soumis à un trajet de chargement non-proportionnel. Les résultats montrent une distorsion et une translation de la surface de plasticité sans changement de taille. La méthode présentée permet également de vérifier la normalité de la vitesse d'écoulement plastique par rapport à la surface de plasticité.

  11. Faculty research productivity in allied health settings: a TQM approach.

    Paterson, M; Baker, D; Gable, C; Michael, S; Wintch, K

    1993-01-01

    Faculty research productivity in colleges of allied health has often been discussed in the literature over the last five years. Articles have focused on the problem of faculty research productivity from various viewpoints, but none have used a theoretical framework to analyze the problem. The total quality management (TQM) framework is currently being used in health care to improve quality and productivity. This article uses the TQM framework to synthesize literature concerning faculty research productivity and verifies the current relevance of synthesis findings using an allied health faculty survey. These analyses show that the TQM framework is useful in suggesting ways to increase faculty research productivity in colleges of allied health.

  12. Influencers of career choice among allied health students.

    Brown-West, A P

    1991-01-01

    This study focused on the factors that influence students' choice of an allied health profession. A survey of 153 students in three allied health programs at the University of Connecticut revealed that "the need to help others," "prestige," "professional autonomy," "opportunities for advancement," "income potential," and "the effect of the specialty on family and personal life," were the major influencers of career choice among allied health students. Only a few students regarded malpractice suits and AIDS as negative influencers. While medical laboratory science majors regarded these as important factors, dietetics and physical therapy majors did not. The article suggests further use of these findings by program directors and career counselors.

  13. Measuring heterosexual LGBT ally development: a Rasch analysis.

    Ji, Peter; Fujimoto, Ken

    2013-01-01

    An instrument was developed that measured heterosexual persons' level of lesbian, gay, bisexual, and transgender (LGBT) ally identity. Using a Rasch analysis, 2 dimensions were observed: (a) internal and interpersonal and (b) activity. Persons with high levels of LGBT ally identities endorsed items about having LGBT knowledge, attitudes, and skills; having interpersonal experiences with LGBT communities; and including LGBT ally as part of their identities. The instrument met criteria for the content, substantive, structural, generalizability, and responsiveness validity. The instrument can be used to assist persons to develop their abilities to support and advocate for equality for LGBT communities.

  14. Fatigue crack growth behaviour of Al-Li alloys

    Saravanakumar, R.; Ramakrishna, K. S.; Kanna, B. Avinash

    2013-06-01

    Al-Li alloys are being used in aircraft structures due to its low density and inherent mechanical properties. Fatigue Crack Growth (FCG) resistance is usually high compared to conventional Al-alloys attributed to increased modulus and crack closure. Extensive investigations concern about the FCG resistance and crack closure in Al-Li alloys. The present work reviews the FCG resistance in Al-Li alloys and the mechanisms associated with it. The alloy 8090 is taken for the consideration and sometimes compared with 2024.

  15. Quelques considérations sur l’évolution des normes de calcul des poteaux avec la section mixte acier-béton

    Nicolae Chira

    2010-03-01

    Full Text Available Depuis près d’un siècle, le système de construction basé sur des portiques en acier ou mixtes acier béton est devenu l’un des types les plus utilisés dans le domaine du génie civil. Plusieurs générations d’ingénieurs se sont préoccupées du développement des méthodes de calcul et des technologies de fabrication relatives à ces structures. En vue d’un dimensionnement optimal des structures, les ingénieurs sont tenus de trouver un compromis entre les exigences structurales de résistance, rigidité et ductilité d’une part, et les objectifs d’utilisation et de fonction relevant d’exigences architecturales d’autre part. Cette article fait une comparaison entre différents méthodes de dimensionnement des poteaux mixtes acier béton, en tenant compte des plusieurs paramètres.

  16. Fragilisation par le zinc liquide des aciers haute résistance pour l'automobile Liquid zinc embrittlement of high strength automotive steels

    Frappier Renaud

    2013-11-01

    Full Text Available Cette étude présente les investigations menées sur la fragilisation par le zinc liquide d'un acier électro-zingué. La caractérisation mécanique par essais de traction à haute température montre un important puits de ductilité entre environ 700 ∘C et environ 950 ∘C. L'observation au MEB des éprouvettes de traction indique que, dans la gamme de température observée pour laquelle il y a fragilisation, on a mouillage intergranulaire des joints de grains de l'acier à l'interface acier/revêtement par des films de Zn. La corrélation entre mouillage intergranulaire thermiquement activé d'une part, et propagation de fissure lors du chargement d'autre part, est discutée. This study deals with liquid zinc embrittlement for electro-galvanized steel. Mechanical characterization by high temperature tensile tests shows a drastic loss of ductility between 700 ∘C and 950 ∘C. SEM investigations show that steel grain boundaries under the steel/coating interface are penetrated by a liquid Zn channel, only in the temperature range of embrittlement. A correlation can be drawn between i thermal activated-grain boundary wetting and ii crack propagation in presence of external stress.

  17. Dynamic and kinetic properties of Al-Li melts

    Kiselev, A. I.

    2008-12-01

    The dynamic and kinetic properties of Al-Li melts are calculated. The liquid phase of this system is shown to be characterized by three states with different ion distributions and different degrees of electron localization.

  18. Allied Health Field, Tenth Grade. Introduction to Allied Health and the Health Care Team. Operation TACT [Toward an Allied Health Career Today] Curriculum [and Teachers' Handbook].

    Smith, Tracy

    The two-part set consists of a student handbook and a related teachers' handbook in allied health education for use at the tenth grade level. The student handbook consists of seven units which focus on the biology curriculum: (1) community water examination, (2) bacteriological examination of water, (3) the microscope, (4) microbes and man, (5)…

  19. Research experience and research interests of allied health professionals.

    Stephens, Delwyne; Taylor, Nicholas F; Taylor, Nicholas; Leggat, Sandra G

    2009-01-01

    Allied heath professionals are expected to utilize evidence-based practices in their workplaces, and there is an increasing expectation that clinicians will become involved in clinical research. With the aim of establishing the level of interest and experience in clinical research among allied health professionals in Australia, 132 allied health professional in Australia were surveyed to determine their level of interest and their level of experience in clinical research. The Research Spider survey tool was used to examine clinicians' level of research experience and level of research interest across ten core areas. These areas included writing a research proposal, using quantitative methods, publishing research, writing and presenting a research report, analysing and interpreting results, using qualitative research methods, critically reviewing literature, finding relevant literature, generating research ideas and applying for research funding. Overall, allied health professionals rated themselves as having "little research experience." While clinicians' level of interest in research was significantly greater than their level of research experience, clinicians as a whole only had "some interest" in research. Fifteen percent of the sample were very interested in research. The results of this study have implications for the implementation of education and support programs aimed at providing clinical research opportunities for allied health professionals.

  20. Proprietés mécaniques de surface d'un acier inoxydable traité par explosif

    Paillé, L.; Gerland, M.; Villain, J. P.; Badawi, K. F.; Presles, H. N.; Bouchet, B.

    1994-02-01

    A new surface treatment technique by primary explosive was used on a 316L type austenitic stainless steel. Two explosive compositions, inducing a pressure of 1 GPa and 4 GPa respectively, were deposited in a thin layer on plane samples. The detonation induced effects have been characterized by different techniques. The surface roughness increases with the applied pressure, but remains lower than that obtained after shot peening. The microbardness profiles along a direction perpendicular to the treated surface and the microstructural study exhibit a marked hardening on several hundred micrometers associated with a profuse twinning. Moreover, for the 4 GPa pressure a very thin surface layer of fine recrystallized grains appears. In both cases, tensile residual stresses are measured at the surface and compressive stresses beyond 10~μm. The microstructure in the surface layers results of a noticeable thermal effect. The wear resistance of this stainless steel is improved by a factor 10 to 200 depending on the treatment conditions. Une technique de traitement de surface utilisant un explosif primaire a été utilisée sur un acier inoxydable austénitique de type 316L. Deux compositions explosives délivrant des pressions respectives de 1 GPa et 4 GPa ont été déposées en couche mince sur des échantillons plans. Les effets induits par la détonation ont été caractérisés par différentes techniques. La rugosité en surface augmente avec la pression appliquée mais reste très inférieure à celle obtenue après grenaillage. Les profils de microdureté suivant un axe perpendiculaire à la surface traitée et l'étude microstructurale montrent un écrouissage marqué sur quelques centaines de micromètres associé à un maclage important auquel s'ajoute, pour la pression de 4 GPa, une fine recristallisation en surface. Dans les deux cas, les contraintes résiduelles sont de tension en surface et passent en compression au-delà de 10~μm. La microstructure des

  1. AlliedSignal solid oxide fuel cell technology

    Minh, N.; Barr, K.; Kelly, P.; Montgomery, K. [AlliedSignal Aerospace Equipment Systems, Torrance, CA (United States)

    1996-12-31

    AlliedSignal has been developing high-performance, lightweight solid oxide fuel cell (SOFC) technology for a broad spectrum of electric power generation applications. This technology is well suited for use in a variety of power systems, ranging from commercial cogeneration to military mobile power sources. The AlliedSignal SOFC is based on stacking high-performance thin-electrolyte cells with lightweight metallic interconnect assemblies to form a compact structure. The fuel cell can be operated at reduced temperatures (600{degrees} to 800{degrees}C). SOFC stacks based on this design has the potential of producing 1 kW/kg and 1 ML. This paper summarizes the technical status of the design, manufacture, and operation of AlliedSignal SOFCs.

  2. The perceptual domain: a taxonomy for allied health educators.

    Hooker, E Z

    1981-08-01

    A taxonomy of the perceptual domain was proposed over a decade ago. It is hierarchical, as are the taxonomies in the cognitive, affective, and psychomotor domains. Perception involves extraction of information from presenting stimuli, and there is progression of information extraction as the hierarchy is ascended. Perceptual performance at the higher levels of the taxonomy assumes perceptual abilities at the lower levels. A modified version of the perceptual taxonomy applicable to allied health education is presented. Methods concerning application of the taxonomy are suggested. Use of the taxonomy of the perceptual domain would help allied health educators plan instruction and evaluate teaching.

  3. Modeling-Based Processing of Al-Li Alloys for Delamination Resistance Project

    National Aeronautics and Space Administration — Al-Li alloys are of interest for use in aerospace structures due to the desirable combination of high strength and low density. However, high strength Al-Li alloys...

  4. The National Tay Sachs and Allied Diseases Association.

    Zeitlin, Paula

    1986-01-01

    The National Tay-Sachs and Allied Diseases Association is involved in education, research, and prevention of Tay-Sachs, an inherited metabolic disorder which destroys the central nervous system, and over 30 related disorders. The group features a parent peer group network and a support group for carrier couples. (CL)

  5. National Tay-Sachs and Allied Diseases Association, Inc.

    Exceptional Parent, 1977

    1977-01-01

    Reviewed are the history and organization, purpose and programs, and public services of the National Tay-Sachs and Allied Diseases Association, an organization geared toward eradicating Tay-Sachs disease (a hereditary disorder affecting primarily Jewish infants which generally leads to deterioration and death by the child's fifth year). (SBH)

  6. Allied Forces, Southwest Pacific Area Operations Instructions Number 99

    1945-03-21

    Morotai (j) "’ ’•" "’" Commander ALLIED LAND ’Forces, Leyte (5t ) ’. Commending General SIXTH "US Army...1st Aust Corps • 1st Aust Corps Staging Area MOROTAI MOROTAI MOROTAI (Note MOROTAI (Note MOROTAI (Note MOROTAI (Note MOROTAI \\ MOROTAI MOROTAI MOROTAI ... MOROTAI MOROTAI MOROTAI MOROT/.I MOROTAI MOROTAI . MOROTAI

  7. Viscosity and electrical resistivity of Al-Li melts

    Kononenko, V. I.; Razhabov, A. A.; Ryabina, A. V.

    2011-08-01

    The kinematic viscosity and electrical resistivity of Al-Li alloys in the liquid state are studied by a combined electrodeless method. Some theoretical calculations performed to determine the viscosity and electrical resistance by comparing the calculated and experimental data are estimated.

  8. Joining the Struggle: White Men as Social Justice Allies

    Bridges, Christopher Edward; Mather, Peter

    2015-01-01

    This study explored the experience of White men as they sought to support individuals from oppressed groups and participate in a community with other allies like themselves. This research was conducted from a social constructivist epistemological paradigm and informed by a constructivist grounded theory methodology. The following research…

  9. The availability of allied health care in Dutch nursing homes.

    Boer, M.E. de; Leemrijse, C.J.; Ende, C.H.M. van den; Ribbe, M.W.; Dekker, J.

    2007-01-01

    Purpose. To determine the availability of allied health care in nursing homes in the Netherlands, and its dependency on characteristics of the nursing home. Methods. Structured surveys by telephone were carried out in a sample of 100 from a country total of 286 somatic (for somatic patients only) an

  10. Safe Zones: Creating LGBT Safe Space Ally Programs

    Poynter, Kerry John; Tubbs, Nancy Jean

    2008-01-01

    This article discusses model LGBT Safe Space Ally programs. These programs, often called "Safe Zones," include self selected students, faculty, and employees who publicly show support by displaying stickers, signs, and other identifiable items. Issues covered in the article include history, development, training, membership, assessment, and…

  11. 49 CFR 583.11 - Allied suppliers of passenger motor vehicle equipment.

    2010-10-01

    ... 49 Transportation 7 2010-10-01 2010-10-01 false Allied suppliers of passenger motor vehicle... CONTENT LABELING § 583.11 Allied suppliers of passenger motor vehicle equipment. (a) For each unique type of passenger motor vehicle equipment which an allied supplier supplies to the manufacturer with...

  12. Effet de l'etat de la surface de l'acier au carbone 300W sur l'entartrage par la gibbsite dans le procede Bayer

    Gavril, Liliana

    Une etude a ete effectuee sur l'entartrage des surfaces en acier au carbone par la gibbsite dans le procede Bayer. Trois methodes ont ete utilisees afin de determiner le mecanisme de formation du tartre: mesure de la vitesse d'entartrage, etude electrochimique et protection cathodique. Cette etude demontre que le tartre de gibbsite est un tartre de cristallisation et que l'etat physico-chimique de la surface metallique a une influence marquee sur l'entartrage. Ainsi, l'oxyde en surface a ete identifie comme un facteur determinant pour l'entartrage. Les essais electrochimiques ont montre que la couche d'oxyde formee dans les solutions Bayer est un oxyde mixte de fer et d'aluminium. Les essais de protection cathodique a courant constant valident le role determinant joue par l'oxyde sur l'entartrage, puisqu'en empechant l'oxyde de se former, l'entartrage est pratiquement elimine. Le mecanisme d'adherence du tartre a l'acier implique trois etapes, soit l'oxydation du metal, la formation de la goethite/goethite alumineuse sur l'oxyde et finalement, la germination de la gibbsite sur la goethite/goethite alumineuse.

  13. EFFET DES TRAITEMENTS THERMIQUES SUR LA REACTION ENTRE DES COUCHES MINCES DE TITANE ET DES SUBSTRATS EN ACIER

    D Slimani

    2015-06-01

    Full Text Available Des couches minces du titane pur ont été déposées avec la méthode de pulvérisation cathodique sur des substrats en acier, type FF80 K-1 contenants ~1% mass. en carbone. La réaction entre les deux parties du système substrat-couche mince est activée avec des traitements thermiques sous vide dans l’intervalle de températures de 400 à900°Cpendant 30 minutes. Les Spectres de diffraction de rayons x confirment l’inter- diffusion des éléments  chimiques du système résultants la formation et la croissance des nouvelles phases en particulier le carbure binaire TiC ayant des caractéristiques thermomécaniques importantes. L’analyse morphologique des échantillons traités  avec le microscope électronique à balayage (MEB montre l’augmentation du flux de diffusion atomique avec la température de recuit, notamment la diffusion du manganèse et du fer vers la surface libre des échantillons aux températures élevées provoquant la dégradation des propriétés mécaniques des revêtements contrairement au premiers stades d’interaction où on a obtenu des bonnes valeurs de la microdureté.

  14. Structure-Induced Covalent Bonding in Al-Li Compounds

    Nozawa, Kazuki; Ishii, Yasushi

    2010-06-01

    Formation mechanism of a deep pseudogap in the electronic density of states of the Al-Li Bergman and Zintl compounds is discussed with an emphasis on the differences among isostructural Al-Mg compounds. Since Li scatters electrons very weakly in comparison with Al and Mg, the potential landscape for electrons in Al-Li compounds is not that of the entire close-packed structure but that of the Al sublattice, which is a rather porous network like the diamond lattice. The porous network structure realized by the chemical decoration of close-packed structures enhances the covalent nature of electronic structures, hence the deep pseudogap in the electronic density of states. A concept of structure-induced covalent bonding in a network realized by the chemical decoration of close-packed structures may provide a novel picture in the electronic structures of complex intermetallic compounds.

  15. Freeing France: The Allies, the Resistance, and the JEDBURGHs

    2008-01-01

    EMILY, Jean Kohn of Operational Group PEG, Erasmus Kloman of SPOC , Robert LeBlanc, of SF Detachment 11, Geoffrey M. T. Jones, and the irrepressible R. W...Special Operations Executive SPOC – Special Projects Operations Centre SF Det. – Special Force Detachment ULTRA – Allied program that provided...April AFHQ had agreed to take direction regarding their activities with the French Résistance and on 23 May, the Special Projects Office Command ( SPOC

  16. Allies in the Shadows: Why We Need Operational Deception

    2007-11-02

    deceivers executed elaborate campaigns throughout the rest of the war that often left Hitler puzzled about the actual size of allied forces; in fact...1941 through a complex deception system that took advantage of Stalin’s preexisting belief that Germany would not invade the Soviet Union. Hitler ... Enigma intercepts and human intelligence sources. Professional deceivers understand the capabilities and limitations of their art. At the strategic

  17. Ferns and fern allies of District Shopian, Kashmir Valley, India

    SHAKOOR A. MIR

    2015-04-01

    Full Text Available Abstract. Mir SA, Mishra AK, Pala SA, Reshi ZA, Sharma MP. Ferns and fern allies of District Shopian, Kashmir Valley, India Biodiversitas 16: 27-43. Shopian, recently created hilly district of Kashmir valley, Jammu and Kashmir is surrounded by the lofty mountains of Pir-Panjal range. More than half area of district is occupied by different forests, subalpine, alpine and mountainous zones. Great altitudinal variation, adequate rainfall, high forest cover, large number of streams, springs and topographic variations render the district worthy for supporting rich fern flora. Therefore, the current study was aimed to undertake in-depth systematic survey of different habitats of Shopian for the collection of diversity of pteridophytes. Specimens were collected during 2010, 2011 and 2012 growing seasons from June to November. A total 81 species of ferns and fern allies belonging 27 genera and 11 families were reported. The dominant families of the region are Dryopteridaceae (25 species followed by Woodsiaceae (16 species, Aspleniaceae (13 species and Pteridaceae (12 species. Similarly, the dominant genera collected from here are Dryopteris (14 species, Asplenium (13, Polystichum (11 species and Athyrium (6 species. A list of the fern and fern allies, along with update nomenclature, their selected Synonym, diagnostic features, distributional and ecological notes have been provided here.

  18. Nice White Men or Social Justice Allies?: Using Critical Race Theory to Examine How White Male Faculty and Administrators Engage in Ally Work

    Patton, Lori D.; Bondi, Stephanie

    2015-01-01

    Numerous scholars have offered definitions and perspectives for White people to be or become social justice allies. The purpose of this study was to examine the complicated realities that social justice allies in higher education face when working on campus. Using a critical interpretivist approach grounded in critical race theory, the authors…

  19. Inhibition de la corrosion d'acier au carbone en milieu H3PO4 2M par des composés organiques de type ``triazine''

    Bekkouch, K.; Aouniti, A.; Hammouti, B.; Kertit, S.

    1999-05-01

    The effect of addition of some triazine compounds on the corrosion behaviour of steel in 2M H3PO4 has been studied by weight loss and electrochemical polarisation methods. Both methods showed that the dissolution rate was dependent on the chemical properties and concentration of the product. From comparison of results, it was found that 6-azathymine (T6) is the best inhibitor and its inhibition efficiency reaches a maximum value of 86% at 10-3 M. Polarisation measurements indicated that T6 acts as cathodic inhibitor by merely blocking the reaction sites without changing the mechanism of the hydrogen evolution reaction. It was found that T6 was adsorbed on steel surface according to a Langmuir isotherm model. The effect of temperature indicated that inhibition efficiency of T6 is dependent on the temperature in the range 25-50 circC. L'effet de l'addition de certains composés organiques de type triazine sur la corrosion d'un acier en milieu H3PO4 2M a été étudié à l'aide des méthodes électrochimiques et gravimétriques. Les résultats obtenus ont montré que la vitesse de dissolution de l'acier dépend de la structure moléculaire et de la concentration du produit. La comparaison des efficacités inhibitrices montre que le 6-azathymine (T6) est le meilleur inhibiteur de la série des triazines testés. L'efficacité inhibitrice du T6 atteint une valeur maximale de 86 % à 10-3 M. L'allure des courbes de polarisation indique que le T6 agit essentiellement comme inhibiteur de type cathodique par adsorption à la surface de l'acier selon le modèle de l'isotherme de Langmuir. L'efficacité inhibitrice du T6 dépend de la température dans le domaine allant de 25 à 50 circC.

  20. Corrosion influencée par les micro-organismes : influence du biofilm sur la corrosion des aciers, techniques et résultats recents

    Feugeas, F.; Magnin, J. P.; Cornet, A.; Rameau, J. J.

    1997-03-01

    Microbiologically Influenced Corrosion (M.I.C.) studied since the beginning of this century, is responsible for the degradation of many metallic equipments. This study is a review of results dealing with M.I.C. on several types of steels as: carbon steels, stainless steels, welded steels and covered steels. M.I.C. occurs only in presence of a biofilm. The first part of this study describes chemical and physical factors involved in its development, technical methods for studying biofilms, and its contribution in the corrosion process. The second part is devoted to the study of M.I.C. cases linked with metal nature and different aqueous environments and the last part reviews the mainly mecanisms of biocorrosion. La Corrosion Influencée par les Micro-organismes (C.I.M.) ou biocorrosion, phénomène étudié depuis le début du siècle, est responsable de la dégradation d'un grand nombre d'ouvrages métalliques. Cette étude a pour but de faire le point des connaissances sur la corrosion influencée microbiologiquement de divers types d'aciers au carbone, d'aciers inoxydables, d'assemblages soudés et d'aciers revêtus. La C.I.M. n'apparaît qu'en présence d'un biofilm. La première partie de cette étude décrit les facteurs physico-chimiques impliqués dans la formation du biofilm, ces moyens d'études ainsi que son action dans le processus de biocorrosion. La seconde partie est consacrée à la description des cas de biocorrosion classés en fonction de la nature des métaux et des milieux avec lesquels ils sont en contact. La dernière partie de ce document passe en revue les principaux mécanismes de biocorrosion décrits.

  1. Évolution des contraintes résiduelles dans la couche de diffusion d’un acier modèle Fe-Cr-C nitruré

    Jegou, Sébastien; Barrallier, Laurent; Somers, Marcel A. J.

    2011-01-01

    Limiter la fatigue et la corrosion des pièces est possible grâce à une nitruration. Des contraintes résiduelles en découlent. Le rôle de la diffusion du carbone sur le développement de ces contraintes a été étudié sur un acier modèle Fe-3%m.Cr-0.35%m.C.......Limiter la fatigue et la corrosion des pièces est possible grâce à une nitruration. Des contraintes résiduelles en découlent. Le rôle de la diffusion du carbone sur le développement de ces contraintes a été étudié sur un acier modèle Fe-3%m.Cr-0.35%m.C....

  2. Evaluation of Pressurization Fatigue Life of 1441 Al-li Fuselage Panel

    Bird, R. Keith; Dicus, Dennis I.; Fridlyander, Joseph; Davydov, Valentin

    1999-01-01

    A study was conducted to evaluate the pressurization fatigue life of fuselage panels with skins fabricated from 1441 Al-Li, an attractive new Russian alloy. The study indicated that 1441 Al-Li has several advantages over conventional aluminum fuselage skin alloy with respect to fatigue behavior. Smooth 1441 Al-Li sheet specimens exhibited a fatigue endurance limit similar to that for 1163 Al (Russian version of 2024 Al) sheet. Notched 1441 Al-Li sheet specimens exhibited greater fatigue strength and longer fatigue life than 1163 Al. In addition, Tu-204 fuselage panels fabricated by Tupolev Design Bureau using Al-Li skin and ring frames with riveted 7000-series aluminum stiffeners had longer pressurization fatigue lives than did panels constructed from conventional aluminum alloys. Taking into account the lower density of this alloy, the results suggest that 1441 Al-Li has the potential to improve fuselage performance while decreasing structural weight.

  3. Analyse statistique de l'assemblage acier/aluminium réalisé par le procédé de soudage MIG-CMT

    Mezrag, Bachir; Benachour, Mustapha; Deschaux Beaume, Frédéric

    2014-01-01

    International audience; La dépendance vis-à-vis des paramètres de soudage de la géométrie de l'assemblage hétérogène acier/aluminium réalisé par le procédé MIG-CMT dans une configuration à clin est étudiée à travers un plan d'expérience. Les paramètres choisis comme facteurs d'influence sont la puissance de soudage, la distance entre la torche et la pièce ou "stick-out", le débit de gaz et la vitesse de soudage, tandis que les caractéristiques géométriques sélectionnées comme fonctions object...

  4. Électropolymérisation de l'aniline en milieu neutre : application au dépôt de polyaniline sur acier doux

    Camalet, J. L.; Lacroix, J. C.; Aeiyach, S.; Lacaze, P. C.

    1998-06-01

    The use of perchlorate ions allowed to carry out the aniline electropolymerization on Pt and mild steel in neutral aqueous medium and yield conducting, homogenoeus and adhering polyaniline films. Their structure, studied by IR, SEC and MS-MALDI, was characterized by a low degree of polymerization (DP ≈ 9) and a linear structure with chain coupling in 1,4 position of aniline rings. L'utilisation de l'ion perchlorate permet de réaliser l'électropolymé risation de l'aniline sur électrode de Pt et d'acier doux en milieu aqueux neutre (pH = 7). Des films conducteurs, homogènes et adhérents aux substrats sont obtenus. L'analyse par IR, CES et MS-MALDI, révèle un faible degré de polymérisation (DP ≈ 9) et des couplages essentiellement 1-4 des noyaux aromatiques.

  5. Experimental investigation of the residual stresses of 304L tubular welded joints; Caracterisation des contraintes residuelles sur assemblages soudes tubulaires en acier 304L

    Monin, L.; Panier, S.; Hariri, S.; Zakrzewski, D. [Ecole des Mines de Douai, 941, rue Charles Bourseul, BP 10838, 59508 DOUAI Cedex (France); Faidi, C. [EDF-SEPTEN, 12-14, avenue Dutrievoz, 69628 VILLEURBANNE (France)

    2007-07-01

    In the nuclear energy industry, the use of components made of austenitic stainless steel is widely spread, because of its specific thermal properties. The assembly of these pressure vessels and piping by welding processes often requires surface mechanical operations. These operations aim at hardening surfaces and lowering roughness. Nevertheless the main effect of these operations is the occurrence of residual stresses which can have positive or negative effects on the fatigue life. In this study, we focus on the evaluation and relaxation of residual stresses level on AISI 304L austenitic stainless steel tubular welded structures. Some of these rings are base metal rings (which stand as reference), the rest presents a longitudinal and symmetrical Y-weld joint, with or without grinding. Surface residual stresses, and their relaxation, were determined by using the X-ray diffraction method. (authors) [French] L'utilisation de composants en acier inoxydable austenitique, aux proprietes thermiques bien specifiques, est tres courante dans le domaine de la production d'energie nucleaire. Les procedes d'assemblage par soudage de ces equipements sous pression requierent des traitements de parachevement mecanique afin d'ameliorer l'etat de surface et modifier l'etat mecanique en introduisant des contraintes residuelles, qui peuvent avoir une influence sur la duree de vie de la structure. Cette etude porte sur la caracterisation et la relaxation des contraintes residuelles, determinees sur des eprouvettes annulaires specifiques en acier inoxydable austenitique de type 304L, a l'etat brut ou avec des soudures, arasees ou non. La methode de determination utilisee est la diffraction des rayons X. La relaxation de ces contraintes au cours d'essais de fatigue est egalement etudiee. (auteurs)

  6. ADEA/AAL Institute for Allied Health Educators: Program Evaluation.

    Gadbury-Amyot, Cynthia C; Overman, Pamela R; Grzesikowski, Tami; Tucker-Lively, Felicia; Weinstein, George; Haden, N Karl

    2015-05-01

    Revised accreditation standards for dental and dental hygiene education programs have increased emphasis on faculty development that can improve teaching and learning, foster curricular change including use of teaching and learning technologies, and enhance retention and satisfaction of faculty. The American Dental Education Association (ADEA) and Academy for Academic Leadership (AAL) established the Institute for Allied Health Educators (IAHE) in 2007 to address faculty development needs for allied dental and allied health educators. In 2009, it was transitioned to an online program, which resulted in increased enrollment and diversity of participants. After seven years, a comprehensive program evaluation was warranted. The authors developed an online questionnaire based on Kirkpatrick's four-level model of training evaluation; for this study, levels one (satisfaction), two (knowledge and skill acquisition), and three (behavior change) were examined. Of the 400 program participants invited to take part in the study, a 38% response rate was achieved, with the majority indicating full-time faculty status. Nearly all (95-97%) of the respondents agreed or strongly agreed the program contributed to their teaching effectiveness, and 88-96% agreed or strongly agreed it enhanced their knowledge of educational concepts and strategies. In addition, 83% agreed or strongly agreed the program helped them develop new skills and confidence with technology, with 69% agreeing or strongly agreeing that it helped them incorporate technology into their own educational setting. Nearly 90% were highly positive or positive in their overall assessment of the program; 95% indicated they would recommend it to a colleague; and 80% agreed or strongly agreed they had discussed what they learned with faculty colleagues at their home institutions who had not attended the program. Positive findings from this evaluation provide evidence that the IAHE has been able to meet its goals.

  7. A controlled vocabulary for nursing and allied health in Norway.

    Flor, P; Jakobsson, A; Mogset, I; Taylor, S; Aasen, S E

    2001-03-01

    Nursing and allied health libraries at educational institutions in Norway have generally indexed their book collections with uncontrolled terms. With the reorganization of higher education in 1994, the majority of these libraries joined BIBSYS, which is a joint library system for higher education and research in Norway. This has led to chaos when searching the joint catalogue for literature on nursing and related fields. A term such as 'behaviour problems' may have up to five synonyms. In an attempt to improve the quality of searching the health literature, BIBSYS appointed a working group in the Spring of 1999 to find a suitable controlled vocabulary for this subject area, and to see how this vocabulary could be integrated into BIBSYS. The group presented its recommendations in October 1999. The report has been well received by the BIBSYS Board and by user groups. There are no Norwegian vocabularies that are suitable for use in nursing and allied health, therefore it will be necessary to translate and combine existing thesauri. The group has looked at the Nordic Multilingual Thesaurus on Health Promotion, the Swedish Spriline Thesaurus, MeSH (Medical Subject Headings) and CINAHL Subject Heading List. Other relevant thesauri are AMED/CATS Thesaurus, Bioethics Thesaurus (Bioethicsline) and the RCN thesaurus. The group recommends the development of a Norwegian thesaurus based on a translation of parts of MeSH and CINAHL Subject Heading List.

  8. Factors associated with sense of community among allied health students.

    Haar, Mindy; Scanlan, Craig

    2012-01-01

    Over the last decade, there has been a substantial increase in online education in the health professions, as well as growing recognition that teamwork and collaboration are essential to success. While the impact of students' sense of community on factors such as course satisfaction and retention has been studied among college enrollees in general, there is little research exploring this concept among allied health students. To address this shortcoming, a convenience sample of students enrolled in a large northeastern school of health-related professions was surveyed to gather information on their demographics, curriculum and selected course attributes, perceived instructor teaching perspectives, and sense of community. Univariate analysis indicated that entry-level students experienced a greater sense of community than post-professional students. Multivariate analysis revealed that instructor-determined factors of encouraging discussion, encouraging expression of opinions, and specifying response times best predicted sense of community. With all other variables controlled, perceptions of community were significantly lower in online courses, among students for whom English was their second language, and in courses where instructors were perceived as focused primarily on content delivery. This study supports promoting selected course and instructor-related attributes associated with sense of community in allied health education, with a particular focus on both non-native English speakers and post-professional students. Enhancement of online courses with strategies that increase instructor presence, better engage students, and facilitate interaction also are warranted.

  9. Allied health care in Parkinson's disease: referral, consultation, and professional expertise.

    Nijkrake, M.J.; Keus, S.H.J.; Oostendorp, R.A.B.; Overeem, S.; Mulleners, W.; Bloem, B.R.; Munneke, M.

    2009-01-01

    There is evidence for the efficacy of allied health care in Parkinson's disease (PD). However, barriers exist that hamper implementation of evidence into daily practice. We conducted a survey to investigate: (1) to what extent PD patients currently utilize allied health care for relevant problems in

  10. The effectiveness of allied health care in patients with ataxia: a systematic review

    Fonteyn, E.M.R.; Keus, S.H.J.; Verstappen, C.C.P.; Schols, L.; Groot, I.J.M. de; Warrenburg, B.P.C. van de

    2014-01-01

    Many patients with cerebellar ataxia have serious disabilities in daily life, while pharmacological treatment options are absent. Therefore, allied health care is considered to be important in the management of these patients. The goal of this review is to evaluate scientific evidence for allied hea

  11. The Safe Space Kit: Guide to Being an Ally to LGBT Students

    Gay, Lesbian and Straight Education Network (GLSEN), 2009

    2009-01-01

    "The Safe Space Kit" is designed to help educators create a safe space for LGBT (lesbian, gay, bisexual, and transgender) students. One of the most effective ways for an educator to create a safe space is to be a supportive ally to LGBT students. The hard copy of "The Safe Space Kit" includes the "Guide to Being an Ally," ten "Safe Space" stickers…

  12. 22 CFR 123.27 - Special licensing regime for export to U.S. allies of commercial communications satellite...

    2010-04-01

    .... allies of commercial communications satellite components, systems, parts, accessories, attachments and... export to U.S. allies of commercial communications satellite components, systems, parts, accessories... associated technical data for commercial communications satellites, and who are so registered with...

  13. Organisational governance structures in allied health services: a decade of change.

    Boyce, R A

    2001-01-01

    A ten year review of developments in the organisation and management of allied health services in Australian acute care public hospitals reveals a steady transformation away from a medically managed universal model towards more complex and contested models of governance. This article revisits early observations about the reorganisation of allied health services and presents more recent research findings to guide managerial decision-making about restructuring the diverse disciplines that constitute allied health. A new organisational model "integrated decentralization" is presented as an approach to managing allied health services which accommodates multiple stakeholder demands in the context of New Public Management (NPM) related reforms. The focus on the institutional level is complemented by examining developments in the profile and activity of allied health at the regional, state and national levels to present a more comprehensive picture of change over the decade of the 1990s.

  14. Some problems on the aqueous corrosion of structural materials in nuclear engineering; Problemes de corrosion aqueuse de materiaux de structure dans les constructions nucleaires

    Coriou, H.; Grall, L. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    The purpose of this report is to give a comprehensive view of some aqueous corrosion studies which have been carried out with various materials for utilization either in nuclear reactors or in irradiated fuel treatment plants. The various subjects are listed below. Austenitic Fe-Ni-Cr alloys: the behaviour of austenitic Fe-Ni-Cr alloys in nitric medium and in the presence of hexavalent chromium; the stress corrosion of austenitic alloys in alkaline media at high temperatures; the stress corrosion of austenitic Fe-Ni-Cr alloys in 650 C steam. Ferritic steels: corrosion of low alloy steels in water at 25 and 360 C; zirconium alloys; the behaviour of ultrapure zirconium in water and steam at high temperature. (authors) [French] On presente un ensemble d'etudes de corrosion en milieu aqueux effectuees sur des materiaux utilises, soit dans la construction des reacteurs soit pour la realisation des usines de traitement des combustibles irradies. Les differents sujets etudies sont les suivants. Les alliages austenitiques Fer-Nickel-Chrome: comportement d'alliages austenitiques fer-nickel-chrome en milieu nitrique en presence de chrome hexavalent; Corrosion sous contrainte d'alliages austenitiques dans les milieux alcalins a haute temperature; Corrosion sous contrainte dans la vapeur a 650 C d'alliages austenitiques fer-nickel-chrome. Les aciers ferritiques; Corrosion d'aciers faiblement allies dans l'eau a 25 et 360 C; le zirconium et ses alliages; Comportement du zirconium tres pur dans l'eau et la vapeur a haute temperature. (auteurs)

  15. ECHAUFFEMENT ET EVOLUTION STRUCTURALE D’UN ACIER XC 42 LORS D’UN ESSAI DE TORSION A 700 °C

    R BENSAHA

    2001-12-01

    Full Text Available Ce travail a pour but de montrer qu'il est possible d’apprécier la température et de développer un modèle simple de calcul de la recrudescence de la température en cours de déformation pour un acier XC 42 à une température d'essai  de 700°C et pour deux vitesses de déformation généralisées différentes de 5s-1 et 30s-1.                 Cette étude prend en considération, d'une part l'enthalpie  du changement de phase a®g  qui se libère au cours de la déformation dans l'intervalle de température A1-A3, et d'autre part, des mécanismes thermiquement activées (restauration et recristallisation dynamique mis en jeu lors de la déformation du matériau. Comme nos essais étaient pratiqués à la température de 700°C, proche de celle du point de transformation A1, les structures obtenues après trempe rapide montrent bien que pendant la déformation le matériau a subi la transformation de phase a®g, provoquée par l'auto échauffement de l'acier XC42. Le degré d'austénitisation est donc fonction de l'auto échauffement du matériau qui, à grande vitesse de déformation (227°C, est plus important qu'à faible vitesse (142°C.

  16. Thermal Exposure Effects on Properties of Al-Li Alloy Plate Products

    Shah, Sandeep; Wells, Douglas; Wagner, John; Babel, Henry

    2003-01-01

    The objective of this viewgraph representation is to evaluate the effects of thermal exposure on the mechanical properties of both production mature and developmental Al-Li alloys. The researchers find for these alloys, the data clearly shows that there is no deficit in mechanical properties at lower exposure temperatures in some cases, and a signficant deficit in mechanical properties at higher exposure temperatures in all cases. Topics considered include: Al-Li alloys composition, key characteristics of Al-Li alloys and thermal exposure matrix.

  17. Etude analytique et numérique de la réponse en vibration à hautes fréquences d'éprouvettes de fatigue vibratoire des métaux. Application aux aciers

    Ben Aich, A.; El Kihel, B.; Kifani, A.; Sahban, F.

    1994-07-01

    In the present paper, the so-called " ultrasonic fatigue " or fatigue at very high frequency has been studied in the materials elastic behaviour case while neglecting the thermal effects that influence the mechanical fields. The determination of mechanical fields and specimen resonance length has been done both analytically and numerically. The numerical method used for this calculation is the finite element method (FEM). Martensitic steel " Soleil A2 " and austenitic steel " ICL 472 BC " have been considered in order to compare the two methods (analytical and numerical). It is shown that a perfect convergence is obtained between the two solutions. Dans le présent travail, la fatigue vibratoire a été étudiée dans le cas du comportement élastique des matériaux en négligeant les effets thermiques pouvant influencer les champs mécaniques. La détermination de ces champs et de la longueur de résonance des éprouvettes de fatigue a été faite analytiquement et numériquement. Le calcul numérique effectué se base sur la méthode des éléments finis. Dans le but d'une comparaison des solutions analytiques et numériques, deux aciers ont été considérés : un acier martensitique (Soleil A2) et un acier austénitique de type 18-10 (ICL 472 BC). Une parfaite convergence est obtenue entre les deux solutions.

  18. Effect of Impurities and Cerium on Stress Concentration Sensitivity of Al-Li Based Alloys

    孟亮; 田丽

    2002-01-01

    A notch sensitivity factor was derived in order to evaluate the stress concentration sensitivity of Al-Li based alloys. The factor values for the Al-Li alloy sheets containing various contents of impurities and cerium addition were evaluated by determining the mechanical properties. It is found that the impurities Fe, Si, Na and K significantly enhance the stress concentration sensitivity of the alloys 2090 and 8090, whereas cerium addition reduces the stress concentration sensitivity to a certain degree for the high strength alloys. However, an excess amount of cerium addition in the high ductility alloy 1420 can significantly increase the stress concentration sensitivity. As compared with conventional aluminum alloys, the Al-Li based alloys generally show high stress concentration sensitivity. Therefore, a special attention must be paid to this problem in the practical application of Al-Li based alloys.

  19. The Evolution of Al-Li Base Products for Aerospace and Space Applications

    Rioja, Roberto J.; Liu, John

    2012-09-01

    A technical review of the physical, mechanical, and metallurgical variables that have influenced performance of Al-Li based alloys over the last 50 years is presented. First, the historic evolution of different alloys is discussed. Then, the microstructural features responsible for different mechanical properties are identified and discussed. The role of alloying additions is discussed. The shortcomings of a 2nd generation Al-Li alloys are introduced and the key alloy design principles used to overcome these are discussed. Finally, the performance parameters that play a major role in sizing several aircraft and space craft components are reviewed in a chronological perspective and compared with 3rd-generation Al-Li alloys. It is concluded that significant improvements have been made to position Al-Li alloys to enable improved performance of next generation of air and space craft.

  20. MODÉLISATION DES FLUX DE CHALEUR GÉNÉRÉS PAR FROTTEMENT GLISSANT DANS UN CONTACT CUIVRE-ACIER TRAVERSÉ PAR UN COURANT ÉLECTRIQUE

    A BOUCHOUCHA

    2001-06-01

    Full Text Available Le problème de la conduction de la chaleur dans un contact électrique glissant cuivre–acier est étudié. Le couple fonctionne dans des conditions atmosphériques et est donc refroidi par convection naturelle à travers les faces latérales. En utilisant l'équation de la chaleur, un modèle de calcul de la température interfaciale a été élaboré. A l'aide de la méthode des volumes finis, les résultats de la température en fonction de la charge normale, la vitesse de glissement et le courant électrique sont donnés. Une comparaison avec la méthode d'Archard est faite. Les résultats montrent une bonne concordance. Une discussion globale du modèle élaboré et son application dans les contacts électriques glissants a été dégagée.

  1. Controle sismique d'un batiment en acier de 1 etage par amortisseurs elastomeres et contreventements en Chevron

    Girard, Olivier

    ). Bien que la demande en deplacement soit plus grande pour le systeme propose que pour un systeme contrevente traditionnel, la demande en deplacement est adequatement controlee. Finalement, il a ete possible de confirmer que le systeme propose repond elastiquement aux sollicitations sismiques et son comportement apres une sollicitation violente est adequat. Toutefois, les connaissances limitees du materiel elastomere employe causent l'obtention de dimensionnement moins performant qu'attendu. L'ensemble de l'etude a permis de mettre en relief les caracteristiques et les avantages indeniables du SRFS propose. Toutefois, certains points, necessitant davantage d'etudes, ont egalement ete souleves lors de cette recherche : le comportement de l'elastomere utilise pour un plus vaste domaine de situations que celle consideree dans cette etude (par exemple, l'impact de la temperature sur le caoutchouc et le comportement en fatigue de ce dernier) ainsi que le comportement du systeme etudie pour un domaine plus vaste d'applicabilite (par exemple, l'applicabilite du systeme a des batiments multietages). mots cles : Controle sismique, elastomere, saut de periode, amortisseur, charpente d'acier, genie parasismique, dynamique des structures.

  2. Influence of alloying elements on mechanical properties of Al-Li plates

    杨守杰; 戴圣龙; 苏彬; 颜鸣皋

    2004-01-01

    The effect of alloying elements such as Cu, Mn and Zr on the mechanical properties of the Al-Li plates was studied, and the grain structure, crystallographic texture and precipitates were also investigated. It is found that the element Zr has a two-fold effect on the anisotropy of mechanical properties; the addition of element Mn can reduce the crystalline texture and the anisotropy of Al-Li plates. However, the effect of Cu element appears less pronounced.

  3. [Determination of hydrogen in 2,091 Al-Li alloy].

    Wang, X; Yang, Y

    2000-02-01

    High volatility element Li exists in 2091 Al-Li alloy, and makes the difficulty for the determination of hydrogen. A lot of tests were done, for example, how to distinguish the body and surface hydrogen, to choice heating power, heating time and the size of sample. Then the analytical method is established and many discussions were done. The reproducibility and accuracy is satisfactory, and compared with the Russian Al-Li alloy hydrogen standard sample.

  4. Al-Li Alloy 1441 for Fuselage Applications

    Bird, R. K.; Dicus, D. L.; Fridlyander, J. N.; Sandler, V. S.

    2000-01-01

    A cooperative investigation was conducted to evaluate Al-Cu-Mg-Li alloy 1441 for long service life fuselage applications. Alloy 1441 is currently being used for fuselage applications on the Russian Be-103 amphibious aircraft, and is expected to be used for fuselage skin on a new Tupolev business class aircraft. Alloy 1441 is cold-rollable and has several attributes that make it attractive for fuselage skin applications. These attributes include lower density and higher specific modulus with similar strength as compared to conventional Al-Cu-Mg alloys. Cold-rolled 1441 Al-Li sheet specimens were tested at NASA Langley Research Center (LaRC) and at the All-Russia Institute of Aviation Materials (VIAM) in Russia to evaluate tensile properties, fracture toughness, impact resistance, fatigue life and fatigue crack growth rate. In addition, fuselage panels were fabricated by Tupolev Design Bureau (TDB) using 1441 skins and Al-Zn-Mg-Cu alloy stiffeners. The panels were subjected to cyclic pressurization fatigue tests at TDB and at LaRC to simulate fuselage pressurization/depressurization during aircraft service. This paper discusses the results from this investigation.

  5. Allied health team management of rheumatoid arthritis patients.

    Feinberg, J R; Brandt, K D

    1984-09-01

    The use of a coordinated team of allied health professionals (AHPs) to treat patients with rheumatoid arthritis assigned to experimental groups (EG) and comparison groups (CG) was assessed. The EG patients were evaluated regularly by each AHP team member, whereas CG patients were seen by AHPs only upon referral. Of the 10 EG and 13 CG patients who remained in the study for 2 years, the EG patients initially exhibited somewhat greater disease activity than CG (as reflected by erythrocyte sedimentation rate and duration of morning stiffness). After 2 years, EG patients demonstrated less disease activity than at the outset, whereas CG patients either showed little change in these parameters or deteriorated during the study. Grip strength, which was initially similar in the two groups, improved in EG patients but decreased in CG patients, so that after 2 years a significant difference was noted between the two groups (p less than .05). Tendency to lose hand range of motion was also greater in CG than in EG patients. Some EG patients showed improvement in finger flexion deformities during the study. Furthermore, EG patients showed a greater tendency to acquire positive attitudes regarding themselves and family relationships. These results suggest that ongoing "team care" may be more efficacious than episodic use of AHPs in management of patients with mild rheumatoid arthritis.

  6. Allied Health Field, Seventh Grade. Operation TACT [Toward an Allied Health Career Today] Field Test Curriculum 1973-1975 [and Teachers' Handbook].

    Connecticut Univ., Storrs. School of Allied Health Professions.

    The two-part set consists of a student handbook and a related teachers' handbook in allied health education for use at the seventh grade level. The student handbook contains four units: (1) investigating health care needs, (2) mental health--study of different types of job roles and their related activities and skills, (3) treatment--diagnosis of…

  7. Self-Medication Practice Among Allied and Non-Allied Health Students of the University of Santo Tomas

    JAY P. JAZUL

    2014-08-01

    Full Text Available – Self-medication is presumed to be widely practiced around the world. This can be defined as the use of drugs to treat self-diagnosed disorders or symptoms, or the intermittent or continued use of a prescribed drug for chronic or recurrent disease or symptoms. High level of education and professional status has also been mentioned as predictive factors for self-medication. Students from the allied and nonallied health institutions of the University of Santo Tomas were assessed for the factors of self-medication practices.A total of 66 graduating students were asked to accomplish the questionnaire. To ensure valid responses, the researchers supervised the respondents on accomplishing the questionnaires. Mean and range summarized the age while counts and percentages summarized the gender, school, practice of selfmedication, therapeutic classes, health conditions, reasons and sources of self-medication. A total of 55 reported that they practice self-medication. On the total 66 respondents practicing self-medication is antibiotics, anti-allergic and antihistamine, and decongestants. The 55 respondents documented headache to be the most self-treated health condition followed by cough and cold, toothache, muscle pain pimples, back/chest pain, dizziness, and diarrhea/constipation. Significantly greater percentage of females (p=0.038 use antibiotics. Respondents with high self-care orientation are self-medicating on antibiotics (p=0.027, anti-allergic (p<0.001, and herbal medicine (p=0.001 than respondents with low self-care orientation.

  8. Soudage hybride Laser-MAG d'un acier Hardox® Hybrid Laser Arc Welding of a Hardox® steel

    Chaussé Fabrice

    2013-11-01

    Full Text Available Le soudage hybride laser-MAG est un procédé fortement compétitif par rapport aux procédés conventionnels notamment pour le soudage de fortes épaisseurs et les grandes longueurs de soudure. Il connait de ce fait un développement important dans l'industrie. La présente étude s'est portée sur la soudabilité de l'acier Hardox® par ce procédé. Un large panel de techniques de caractérisation a été employé (mesures thermiques, radiographie X, duretés Vickers, macrographie…. L'objectif étant de déterminer l'influence des paramètres du procédé sur la qualité de la soudure et d'étendre notre compréhension des phénomènes se déroulant lors de ce type de soudage. Hybrid Laser Arc Welding (HLAW technology is a highly competitive metal joining process especially when high productivity is needed and for the welding of thick plates. It is a really new technology but its implementation in industry accelerates thanks to recent improvements of high power laser equipment and development of integrated hybrid welding heads. This study focuses on weldability of Hardox® 450 steel by HLAW. Welding tests were conducted by making critical process parameters vary. Then a large panel of characterization techniques (X-Ray radiography, macroscopic examination and hardness mapping was used to determine process parameters influence on weldability of Hardox 450® Steel.

  9. Quality improvement – rival or ally of practice development?

    Gavin Lavery

    2016-05-01

    Full Text Available The majority of nurses, doctors, allied health professionals and other healthcare staff possess a strong desire to provide the best possible care and experience for their patients. Unfortunately, this sometimes falls short of what was planned or intended (Institute of Medicine, 2001, p 23. The gap between care intended and care delivered can be explained by problems with systems and processes and/or people and culture. The narrowing of this gap is the focus of many strategies, methodologies and approaches. Practice development is described as ‘an activity focused on developing people and practice for the ultimate purpose of achieving high-quality person-centred care’ and a ‘methodology that aims to achieve effective workplace cultures that are person-centred’ (Shaw, 2012; Manley et al., 2014. Practice development undoubtedly has a strong focus on people and culture and the potential to change processes and systems. Another approach, widely referred to as quality improvement, aims to improve safety, effectiveness and person-centredness in healthcare using principles proven effective in other industries such as manufacturing – notably car manufacturing (Toyota, oil production, nuclear power and aviation. The fundamental principles of quality improvement for healthcare include making care reliable (every patient receiving care as intended every time, using well-designed processes and reducing variation (agreeing a consistent way to provide care. At first glance this may appear to be an approach suited only to systems and processes. However, better processes, designed by those who use them, resulting in fewer errors and less re-working or working around problems, can reduce stress on staff, offer greater job satisfaction with improved morale and free up time to provide person-centred care. In his report, A Promise to Learn – a Commitment to Act (2013, p 24, Professor Don Berwick says: ‘Mastery of quality and patient safety sciences and

  10. Allied health personnel's attitudes and perceptions of teamwork supporting children with developmental concerns.

    Gallagher, Peggy A; Malone, D Michael

    2005-01-01

    This report describes the attitudes and perceptions of allied health personnel toward the efficacy and performance characteristics of school-based teams supporting children with developmental concerns. Sixty-three allied health personnel were asked to complete the Attitudes About Teamwork Survey, the Team Characteristics Survey, and the Team Process Perception Survey. Respondents held a generally positive attitude about teamwork. Respondents' beliefs about the efficacy of the team process were moderately associated with critical performance characteristics. Effect sizes associated with these data suggest that the results were not only statistically significant but also noteworthy. Respondents also provided their perspectives on the benefits, limitations, supports, and recommendations of teamwork. Results were consistent with both the general teamwork literature and that focused on allied health professions. The authors describe practical implications of the results and directions for further investigation on this topic.

  11. Brandon/Hill selected list of print books and journals in allied health.

    Hill, Dorothy R; Stickell, Henry N

    2003-01-01

    This list of 434 books and 79 journals is intended as a selection guide for print literature to be used in a library supporting allied health educational programs or allied health personnel in either an academic or health care setting. Because of the impossibility of covering the large number of and wide variety of allied health professions and occupations, the recommended publications are focused primarily on the educational programs listed and recognized by the American Medical Association and other accrediting bodies. Books and journals are categorized by subject; the book list is followed by an author/editor index and the subject list of journals by an alphabetical title listing. Items suggested for initial purchase (169 books and 32 journals) are indicated by asterisks. To purchase the entire collection of books and journals (2002 subscriptions) would require an expenditure of about $36,744. The cost of only the asterisked items totals $14,465.

  12. Allied health deans' and program directors' perspectives of specialized accreditation effectiveness and reform.

    Baker, Sarah S; Morrone, Anastasia S; Gable, Karen E

    2004-01-01

    Criticisms, calls for change, and recommendations for specialized accreditation improvement have been made by individuals or groups external to the daily operations of allied health educational programs, frequently as opinion pieces or articles lacking a research foundation. While there is a great deal of concern related to specialized accreditation, little input has been provided from those within, and integral to, allied health educational programs affected by specialized accreditation standards. The purpose of this study was to explore the perspectives of selected allied health deans and program directors regarding specialized accreditation effectiveness and reform. Survey research was used to study perspectives of allied health deans and program directors located in four-year colleges and universities and in academic health centers and medical schools. Surveys were mailed to program directors offering-programs in clinical laboratory sciences and medical technology, nuclear medicine technology, occupational therapy, physical therapy, radiation therapy, and radiography. Simultaneously, allied health deans located within these institutions were surveyed. A total of 773 surveys were mailed and 424 valid responses were received, yielding a response rate of 55%. The results affirmed the role of accreditation as an effective system for assuring quality in higher education. The role of specialized accreditation in improving the quality of allied health programs was clearly articulated by the respondents. Respondents voiced strong opposition to governmental or state-level requirements for accountability and emphasized the vital role of peer evaluators. Significant differences in deans' and program directors' perspectives related to specialized accreditation were evident. Whereas deans and program directors agreed with the purposes of specialized accreditation, they expressed less support for the process and effectiveness, and critique and reform, of specialized

  13. EBSD and Nanoindentation-Correlated Study of Delamination Fracture in Al-Li Alloy 2090

    Tayon, Wesley A.; Crooks, Roy E.; Domack, Marcia S.; Wagner, John A.; Elmustafa, A. A.

    2008-01-01

    Al-Li alloys offer attractive combinations of high strength and low density. However, a tendency for delamination fracture has limited their use. A better understanding of the delamination mechanisms may identify methods to control delaminations through processing modifications. A combination of new techniques has been used to evaluate delamination fracture in Al-Li alloys. Both high quality electron backscattered diffraction (EBSD) information and valid nanoindentation measurements were obtained from fractured test specimens. Correlations were drawn between nano-scale hardness variations and local texture along delaminating boundaries. Intriguing findings were observed for delamination fracture through the combined analysis of grain orientation, Taylor factor, and kernel average misorientation.

  14. A TECHNIQUE FOR IMPROVING THE TOUGHNESS OF Al-Li POWDER METALLURGY ALLOYS

    1987-01-01

    A technique has been developed for increasing the toughness of Al-Li products made by powder metallurgy. The technique which involves the addition of unalloyed aluminum powder to Al-Li powder before compaction was evaluated with Al-Li-Cu-Mg-Zr alloys (Al 8090), and Al-Li-Zn-Cu-Mg-Zr and Al-Li-Mg-Si-Cr alloys . The addition of 15% aluminum to Al 8090 aged at 422K for 40 h produced an increase in impact toughness of 215% at the expense of a drop in yield strength of 11%. The Al-Li-Mg-Si-Cr allo...

  15. Retention in the allied health workforce: boomers, generation X, and generation Y.

    Dodd, Jenny; Saggers, Sherry; Wildy, Helen

    2009-01-01

    The recruitment and retention of allied health workers present challenges for organizations in Australia and internationally. Australia, in common with other developed countries, faces the prospect of a rapidly aging population and the high turnover of younger allied health workers (the majority of whom are female) from employing organizations. Emphases on the individual characteristics of Boomer, Generation X, and Generation Y workers may provide a useful starting base for recruitment and retention strategies, but our study shows that these need to be contextualized within broader political, social, and structural factors that take account of gender and the changing needs of workers over their life span.

  16. 40 CFR Table 1 to Subpart Ccccccc... - Applicability of General Provisions to Paints and Allied Products Manufacturing Area Sources

    2010-07-01

    ... 40 Protection of Environment 14 2010-07-01 2010-07-01 false Applicability of General Provisions to Paints and Allied Products Manufacturing Area Sources 1 Table 1 to Subpart CCCCCCC of Part 63 Protection... Hazardous Air Pollutants for Area Sources: Paints and Allied Products Manufacturing Pt. 63, Subpt....

  17. A Learner-Centered Molecular Modeling Exercise for Allied Health Majors in a Biochemistry Class

    Fletcher, Terace M.; Ershler, Jeff

    2014-01-01

    Learner-centered molecular modeling exercises in college science courses can be especially challenging for nonchemistry majors as students typically have a higher degree of anxiety and may not appreciate the relevance of the work. This article describes a learner-centered project given to allied health majors in a Biochemistry course. The project…

  18. Respiratory Therapy Discipline Advisory Group Final Report. Kentucky Allied Health Project.

    Kentucky Council on Public Higher Education, Frankfort.

    Respiratory therapy education in Kentucky and articulation within the field are examined, based on the Kentucky Allied Health Project (KAHP), which designed a statewide system to promote entry and exit of prepared personnel at a variety of educational levels. The KAHP model promotes articulation in learning, planning, and resource utilization. The…

  19. Radiological Sciences Discipline Advisory Group Final Report. Kentucky Allied Health Project.

    Kentucky Council on Public Higher Education, Frankfort.

    Radiological sciences education in Kentucky and articulation within this field are examined, based on the Kentucky Allied Health Project (KAHP), which designed an articulated statewide system to promote entry and exit of personnel at a variety of educational levels. The KAHP model promotes articulation in learning, planning, and resource…

  20. Allied Health Occupations II. Radiologic Technologist Aide Component. Student Learning Guide. Middletown Public Schools Curriculum Standards.

    Middletown Public Schools, CT.

    This volume outlines the requirements and content of a second-year course in allied health occupations education that is designed to provide students with a practical understanding of the work done by the radiologic team and to enable them to acquire some basic skills used in the X-ray department. Addressed in the individual units of the course…

  1. Occupational Analysis: Hospital Radiologic Technologist. The UCLA Allied Health Professions Project.

    Reeder, Glenn D.; And Others

    In an effort to meet the growing demand for skilled radiologic technologists and other supportive personnel educated through the associate degree level, a national survey was conducted as part of the UCLA Allied Health Professions Project to determine the tasks performed by personnel in the field and lay the groundwork for development of…

  2. A Reaction to: What about Health Educators? Nutrition Education for Allied Health Professionals

    Turner, Lori W.; Knol, Linda; Meyer, Mary Kay

    2012-01-01

    "What about Health Educators? Nutrition Education for Allied Health Professionals" describes an important issue in health care that is the provision of nutrition education. Obesity and chronic disease rates are rapidly increasing. Due to increase in the prevalence rates of obesity and nutrition-related chronic diseases, there is a growing need for…

  3. Arthritis Research and Education in Nursing and Allied Health: A Forum.

    Public Health Service (DHHS), Rockville, MD.

    A summary of proceedings of the Forum on Arthritis Research and Education in Nursing and Allied Health is presented. The keynote address, "The Burden of Arthritis," by Dorothy P. Rice, provides data collected by the National Center for Health Statistics on the prevalence of arthritis, the burden it imposes, and the volume, type, and cost…

  4. The Allied Health Care Professional's Role in Assisting Medical Decision Making at the End of Life

    Lambert, Heather

    2012-01-01

    As a patient approaches the end of life, he or she faces a number of very difficult medical decisions. Allied health care professionals, including speech-language pathologists (SLPs) and occupational therapists (OTs), can be instrumental in assisting their patients to make advance care plans, although their traditional job descriptions do not…

  5. Kuidas õpilasmalevat laiendada? / Alli Lunter, Jüri Ginter, Lembit Jakobson ... [jt.

    2012-01-01

    Küsimusele vastavad: Viljandi maagümnaasiumi õpetaja Alli Lunter, TÜ õppejõud Jüri Ginter, Unipiha kooli õpetaja Lembit Jakobson, riigikogu liige ja demokraatide ühenduse esimees Rainer Vakra ja TLÜ ajalooinstituudi teadur Ain Lavi

  6. Kuidas möödus vaheaeg? / Sulev Valdmaa, Alli Lunter, Epp-Mare Kukemelk ... [jt.

    2011-01-01

    Küsimusele vastavad Kuusalu keskkooli õpetaja-metoodik Sulev Valdmaa, Viljandi maagümnaasiumi eesti keele õpetaja Alli Lunter, Tallinna 37. keskkooli ja Tallinna Lilleküla gümnaasiumi meediaõpetaja Epp-Mare Kukemelk, haridus- ja teadusministeeriumi kommunikatsioonibüroo konsultant Rein Joamets ja Unipiha algkooli õpetaja Lembit Jakobson

  7. A National Study of Student Selection Practices in the Allied Health Professions.

    Dietrich, Marie C.; Crowley, Judeth A.

    1982-01-01

    Reports the outcomes of a 1978 national survey of candidate selection practices in 4 baccalaureate level and 7 associate degree level allied health disciplines. Found that few programs conducted evaluation of their admissions activities and that physical therapy and dental hygiene programs were the most structured in student selection. (JOW)

  8. Built-up Al-Li structures for cryogenic tank and dry bay applications

    Lisagor, W. Barry

    1993-02-01

    The objectives are: (1) to demonstrate the cost benefits of built-up cryotank and dry bay structures; (2) to study of benefits of using Al alloys; (3) to study of benefit of using Al-Li alloys; (4) to evaluate alternative low-cost stiffener and joining concepts.

  9. Self-management: challenges for allied healthcare professionals in stroke rehabilitation--a focus group study

    Satink, T.J.; Cup, E.H.; Swart, B.J.M. de; Sanden, M.W. van der

    2015-01-01

    PURPOSE: Self-management has become an important concept in stroke rehabilitation. This study explored allied healthcare professionals' (AHPs) perceptions and beliefs regarding the self-management of stroke survivors and their knowledge and skills regarding stroke self-management interventions. METH

  10. Dislocation Dynamics in Al-Li Alloys. Mean Jump Distance and Activation Length of Moving Dislocations

    Hosson, J.Th.M. De; Huis in 't Veld, A.; Tamler, H.; Kanert, O.

    1984-01-01

    Pulsed nuclear magnetic resonance proved to be a complementary new technique for the study of moving dislocations in Al-Li alloys. The NMR technique, in combination with transmission electron microscopy and strain-rate change experiments have been applied to study dislocation motion in Al-2.2 wt% Li

  11. Built-up Al-Li structures for cryogenic tank and dry bay applications

    Lisagor, W. Barry

    1993-01-01

    The objectives are: (1) to demonstrate the cost benefits of built-up cryotank and dry bay structures; (2) to study of benefits of using Al alloys; (3) to study of benefit of using Al-Li alloys; (4) to evaluate alternative low-cost stiffener and joining concepts.

  12. Developing Allies to Transgender and Gender-Nonconforming Youth: Training for Counselors and Educators

    Case, Kim A.; Meier, S. Colton

    2014-01-01

    Lack of training regarding transgender youth leaves K-12 educators unprepared to become allies to this disenfranchised community and attend to their needs. This article explores the pedagogical strategies of two professional workshop models (GLSEN Houston training and the Gender Infinity practitioner training), which provide skills and resources…

  13. The availability and use of allied health care in care homes in the Midlands, UK: commentaries.

    Leemrijse, C.; Veenhof, C.; Boer, M.E. de

    2009-01-01

    The demographic trends of continuing growth of the number of older people will lead to an increasing need for long-term services such as nursing homes. The intensive work delivered by the rehabilitative services provided in the nursing homes includes care by a variety of allied health care personnel

  14. Impairment measures in rheumatic disorders for rehabilitation medicine and allied health care: a systematic review.

    Swinkels, R.A.H.M.; Bouter, L.M.; Oostendorp, R.A.B.; Ende, C.H.M. van den

    2005-01-01

    The objective of this study is to provide a critical overview of available instruments to assess impairments in patients with rheumatic disorders, and to recommend reliable and valid instruments for use in allied health care and rehabilitation medicine. A computer-aided literature search (1982–2004)

  15. Past and future use of the ICF (former ICIDH) by nursing and allied health professionals.

    Heerkens, Y.F.; Brug, Y. van der; Napel, H.M.T.D. ten; Ravensberg, C.D. van

    2003-01-01

    PURPOSE: This study describes the use of the ICIDH by allied health professionals and the nursing professions in The Netherlands. It is an example for showing how in recent years the application of the ICIDH has developed within professions. The data elements of patient descriptors documented by nur

  16. Impairment measures in rheumatic disorders for rehabilitation medicine and allied health care: a systematic review

    Swinkels, R.A.H.M.; Bouter, L.M.; Oostendorp, R.A.B.; Ende, van den C.H.M.

    2005-01-01

    The objective of this study is to provide a critical overview of available instruments to assess impairments in patients with rheumatic disorders, and to recommend reliable and valid instruments for use in allied health care and rehabilitation medicine. A computer-aided literature search (1982-2004)

  17. Tackling racism as a "wicked" public health problem: Enabling allies in anti-racism praxis.

    Came, Heather; Griffith, Derek

    2017-03-16

    Racism is a "wicked" public health problem that fuels systemic health inequities between population groups in New Zealand, the United States and elsewhere. While literature has examined racism and its effects on health, the work describing how to intervene to address racism in public health is less developed. While the notion of raising awareness of racism through socio-political education is not new, given the way racism has morphed into new narratives in health institutional settings, it has become critical to support allies to make informing efforts to address racism as a fundamental cause of health inequities. In this paper, we make the case for anti-racism praxis as a tool to address inequities in public health, and focus on describing an anti-racism praxis framework to inform the training and support of allies. The limited work on anti-racism rarely articulates the unique challenges or needs of allies or targets of racism, but we seek to help fill that gap. Our anti-racism praxis for allies includes five core elements: reflexive relational praxis, structural power analysis, socio-political education, monitoring and evaluation and systems change approaches. We recognize that racism is a modifiable determinant of health and racial inequities can be eliminated with the necessary political will and a planned system change approach. Anti-racism praxis provides the tools to examine the interconnection and interdependence of cultural and institutional factors as a foundation for examining where and how to intervene to address racism.

  18. Modern National Historiography оn the Attitude of Russian Society to the Entente Allies

    Samokhina Galina

    2014-11-01

    Full Text Available The issues on the diplomacy in public opinion and public consciousness is becoming increasingly important in modern domestic research on the history of Russia’s foreign policy. The article analyzes the works devoted to the social perception of Russia’s relations with allies in the Entente. The attention is paid to the historiography of the foreign political ideas of liberal and conservative leaders represented in political discourse, nonfiction works and periodicals. Liberals and conservatives were not only the object of public judgements – they formed them as well. A significant range of works deals with the problem of the relationship between the Entente allies and the Russian population. The social perception of England and France is considered by researchers both at the level of direct political, economic and military contacts, and based on an abstract image of an ally in the mass consciousness. The evolution of public perceptions of the allies was determined by the situation in the country and on the fronts and by the role of foreign stereotypes. The author analyzes the interconnection of alliance issue with the national interests of Russia, reveals research approaches to the study of the development of Patriotic and revolutionary moods, traces the differences in the estimates of England and France. The present study complements the research on diplomatic history, and yet represents a separate research problem.

  19. A Proposed Curriculum on Death and Dying for the Allied Health Student.

    Dietrich, Marie C.

    1980-01-01

    This article summarizes the existing curricular models on death education for health professions students. A proposed course design for allied health professions students modified from Bloch's medical education objectives for a thanatology course is presented. The development of listening skills is given special emphasis. (Author/CT)

  20. The Impact of Word Processing on Office Administration in the Medical and Allied Health Professions.

    Platt, Naomi Dornfeld

    The effect of word processing equipment on the future medical secretarial science curriculum was studied. A literature search focused on word processing and the medical and allied health professions, word processing and business education, and futuring of and changes in the secretarial science curriculum. Questionnaires to identify various aspects…

  1. Prestige of Allied Health Professions: Perceptions of Occupational and Physical Therapists.

    Parker, Harry J.; Chan, Fong

    1986-01-01

    Fifty-six occupational therapists and 48 physical therapists were surveyed to determine how they rate various allied health occupations in terms of social status. Findings indicate that both groups rate status similarly, although they rate occupational therapy lower than physical therapy, pointing to the need for image enhancement. (CH)

  2. Plagiarism: using a collaborative approach in an online allied health professions course.

    Pence, Patricia L

    2012-01-01

    The purpose of the study was to evaluate the effectiveness of interventions to increase the awareness and understanding of plagiarism among undergraduate students enrolled in an online allied health professions course in a community college in the Midwestern United States. The results suggested that the interventions were effective in educating students about how to avoid plagiarism.

  3. Integration of Practice Experiences into the Allied Health Curriculum: Curriculum and Pedagogic Considerations Before, during and after Work-Integrated Learning Experiences

    Nagarajan, Srivalli Vilapakkam; McAllister, Lindy

    2015-01-01

    Work-integrated learning (WIL) is an essential component of all allied health university courses. In allied health, learning that occurs during WIL experiences and the relationship between academic and WIL experiences are not well understood. Good integration of WIL experiences into the allied health curriculum is key to realizing the full…

  4. Etude du revenu de l'acier z 10 CDNbV0902 (type 9% Cr, 2% Mo + Nb,V) envisage pour la realisation de certains composants des reacteurs a neutrons rapides

    Pelletier, M.; Vilar, R. M.; Cizeron, G.

    1982-02-01

    Après trempe depuis 1100°C, l'acier étudié est formé de ferrite stable à haute température et de martensite. Au cours de revenus anisothermes, la phase martensitique est le siège de la précipitation successive de carbures des types M 3C, M 7C 3 et M 2C, ces deux derniers étant responsables d'un durcissement secondaire significatif. Aux températures plus élevées, ces carbures se dissolvent tandis qu'apparaissent des carbures des types M 23C 6 et M 6C. La phase ferritique initialement sursaturée est, par ailleurs, le siège d'une précipitation de carbures des types M 2C et M 23C 6.

  5. Étude par diffraction des rayons X de la nitruration plasma d'un acier 304L Influence sur l'oxydation à 1000 ^{circ}C

    Marot, L.; Buscail, H.; Straboni, A.; Riffard, F.; Caudron, E.; Cueff, R.

    2002-07-01

    This work presents the influence of various nitridation parameters on the 304L steel oxidation at 1000 ^{circ}C, in air under atmospheric pressure. Nitridation temperatures were ranging between 300 ^{circ}C and 430 ^{circ}C with exposure times lasting from 2 to 8 hours. At 300 and 430 ^{circ}C, the nitridation treatment leads to the solid solution surface formation γ-N without any nitride formation. After oxidation at 1000 ^{circ}C of blank specimens, X ray diffraction reveals the FeCr2O4 spinel formation. This oxide does not act as a good diffusion barrier. With nitrogen treated specimens, the higher the nitridation temperature is and the longer the exposure time is, better is the oxidation behaviour at 1000 ^{circ}C. We then observe that the Cr{1,3}Fe{0,7}O3 oxide is more present in the oxide sale from the very beginning of the oxidation test which is correlated to a final lower mass gain. Cette étude porte sur l'influence des paramètres de nitruration plasma sur l'oxydation de l'acier 304L à 1000 ^{circ}C, sous air, à la pression atmosphérique. Les températures employées lors de la nitruration ont été de 300 ^{circ}C et 430 ^{circ}C pour des durées de nitruration variant entre 2 et 8 heures. A 300 et 430 ^{circ}C, la nitruration conduit à la formation d'une solution solide γ-N en surface sans provoquer la formation de nitrures. Après oxydation à 1000 ^{circ}C du 304L non nitruré, la diffraction des rayons X révèle la formation d'une couche de type spinelle FeCr2O4 qui ne semble pas jouer le rôle de barrière de diffusion. Pour les échantillons préalablement nitrurés, plus la température de nitruration est élevée et plus la durée du traitement est longue, meilleur est le comportement en oxydation. Nous observons alors l'oxyde Cr{1,3}Fe{0,7}O3 en proportion importante dès le début de l'oxydation et une prise de masse finale plus faible.

  6. Comportement des poteaux composites en profils creux en acier remplis de béton Behavior of composite columns in hollow steel section filled with concrete

    Othmani N.

    2012-09-01

    Full Text Available Le but de cet article, est la determination des rigidites flexionnelles EIx et EIy d’fune section mixte acier beton et plus precisement d’fun poteau en tube d’facier de section rectangulaire, remplie de beton, sollicitee a la flexion bi-axiale (N, Mx et My. L’festimation des rigidites sera faite a partir d’fune approche theorique par une analyse du poteau en elements finis (element barre a 4 degres de liberte, basee sur les conditions d’fequilibres a mi-portee en utilisant la relation moment-courbure (M–Φ de l’felement deforme par application de l’fequation suivante: EI=M/Φ. Le comportement des materiaux est celui comme adopte par les reglements Eurocode 2 et 3, respectivement pour le beton et l’facier. Afin de valider l’fapproche theorique utilisee dans cette etude, deux comparaisons ont ete faites : une premiere permettant de comparer les resultats des rigidites determinees par les relations moments courbures et celles calculees par l’fEurocode 4 et une deuxieme comparaison entre les charges de ruines de deux poteaux de grandeurs natures avec ceux testes au laboratoire [2]. Au vu des resultats obtenus, nous pouvons conclure que l’approche théorique utilisée dans cette étude ainsi que les modèles de comportement des matériaux sont adéquats pour ce genre de problèmes. The purpose of this paper is the determination of flexural stiffness EIx and EIy of a concrete filled rectangular cross section of a composite steel column, under biaxial bending (N, Mx and My. The rigidities will be estimated from a theoretical approach using a finite element analysis (element bar with 4 degrees of freedom, based on the equilibrium conditions at mid-span using the moment-curvature relationships (M–Φ of the deformed element by applying the following equation: EI=M/Φ. The material behavior is the one adopted by Eurocode 2 and 3, respectively, for concrete and steel. To validate the theoretical approach used, two comparisons

  7. Effects of Thermal Exposure on Properties of Al-Li Alloys

    Shah, Sandeep; Wells, Douglas; Stanton, William; Lawless, Kirby; Russell, Carolyn; Wagner, John; Domack, Marcia; Babel, Henry; Farahmand, Bahram; Schwab, David; Munafo, Paul M. (Technical Monitor)

    2002-01-01

    Aluminum-Lithium (Al-Li) alloys offer significant performance benefits for aerospace structural applications due to their higher specific properties compared with conventional Al alloys. For example, the application of Al-Li alloy 2195 to the space shuffle external cryogenic fuel tank resulted in weight savings of over 7,000 lb, enabling successful deployment of International Space Station components. The composition and heat treatment of 2195 were optimized specifically for strength-toughness considerations for an expendable cryogenic tank. Time-dependent properties related to reliability, such as thermal stability, fatigue, and corrosion, will be of significant interest when materials are evaluated for a reusable cryotank structure. Literature surveys have indicated that there is limited thermal exposure data on Al-Li alloys. The effort reported here was designed to establish the effects of thermal exposure on the mechanical properties and microstructure of Al-Li alloys C458, L277, and 2195 in plate gages. Tensile, fracture toughness, and corrosion resistance were evaluated for both parent metal and friction stir welds (FSW) after exposure to temperatures as high as 300 F for up to 1000 hrs. Microstructural changes were evaluated with thermal exposure in order to correlate with the observed data trends. The ambient temperature parent metal data showed an increase in strength and reduction in elongation after exposure at lower temperatures. Strength reached a peak with intermediate temperature exposure followed by a decrease at highest exposure temperature. Friction stir welds of all alloys showed a drop in elongation with increased length of exposure. Understanding the effect of thermal exposure on the properties and microstructure of Al-Li alloys must be considered in defining service limiting temperatures and exposure times for a reusable cryotank structure.

  8. Are gender equality institutions the policy allies of the feminist movement? A contingent "yes" in the Spanish central state

    Valiente Fernández, Celia

    2007-01-01

    This article studies the extent to which gender equality institutions are the policy allies of the feminist movement in Spain. A policy ally of the feminist movement is defined as one that adopts the demands of the movement and includes them in the policy process. This article analyses the role played by the Women’s Institute (WI) between 1983 and 2003 in 12 policy debates, in a third of which the WI was an ally of the movement. Two circumstances are identified as necessary for the WI to act ...

  9. Mathematical modeling of the socalled Allis test: a field study in orthopedic confusion

    Haneline Michael

    2007-01-01

    Full Text Available Abstract Background Chiropractors use a variety of supine and prone leg checking procedures. Some, including the Allis test, purport to distinguish anatomic from functional leg length inequality. Although the reliability and to a lesser extent the validity of some leg checking procedures has been assessed, little is known on the Allis test. The present study mathematically models the test under a variety of hypothetical clinical conditions. In our search for historical and clinical information on the Allis test, nomenclatural and procedural issues became apparent. Methods The test is performed with the subject carefully positioned in the supine position, with the head, pelvis, and feet centered on the table. After an assessment for anatomic leg length inequality, the knees are flexed to approximately 90°. The examiner then sights the short leg side knee sequentially from both the foot and side of the table, noting its relative locations: both its height from the table and Y axis position. The traditional interpretation of the Allis test is that a low knee identifies a short tibia and a cephalad knee a short femur. Assuming arbitrary lengths and a tibio/femoral ratio of 1/1.26, and a hip to foot distance that placed the knee near 90°, we trigonometrically calculated changes in the location of the right knee that would result from hypothetical reductions in tibial and femoral length. We also modeled changes in the tibio/femoral ratio that did not change overall leg length, and also a change in hip location. Results The knee altitude diminishes with either femoral or tibial length reduction. The knee shifts cephalad when the femoral length is reduced, and caudally when the tibial length is reduced. Changes in the femur/tibia ratio also influence knee position, as does cephalad shifting of the hip. Conclusion The original Allis (aka Galeazzi test was developed to identify gross hip deformity in pediatric patients. The extension of this test to

  10. Réflexions critiques sur le maintien en emploi de travailleurs vieillissants faiblement qualifiés : responsabilité sociale ou individuelle ? Critical reflection on keeping older low-skilled workers employed : a social or individual responsibility ? Reflexiones críticas sobre el mantenimiento en el empleo de trabajadores de baja calificación que envejecen : responsabilidad social o individual ?

    Thibauld Moulaert

    2009-05-01

    Full Text Available Cet article propose une réflexion pluridisciplinaire (médecins du travail et sociologue sur la nécessité de prolonger les carrières à partir du cas limite de travailleurs faiblement qualifiés de deux entreprises : une entreprise de ramassage de déchets (Cleanbel et une entreprise de distribution alimentaire (Distribel. Croisant réalité pratique et ergonomie d’un côté et enjeu de responsabilité et réflexion sociologique de l’autre, il montre les limites d’un questionnement sur l’emploi des salariés vieillissants quand est occulté le travail analysé au départ de l’activité réelle. En explorant le cas de travailleurs faiblement qualifiés, il montre aussi les marges de manœuvre étroites d’une action sociale possible ou voulue qui pose in fine la question de la responsabilité de cette action : est-elle collective (portée par l’Etat et l’entreprise ou individuelle (portée par le travailleur ?This article proposes multidisciplinary (occupational physicians and sociologist reflection on the need for prolonging careers. It is based on the limit case of low skilled workers in two companies : a waste collection company (Cleanbel, and a supermarket chain (Distribel. It intersects practical reality and ergonomics on the one hand, and aspects of responsibility and sociological reflection on the other. It shows the limitations of reflection on the employment of aging workers when the analysis of the actual work activity is not taken into account. By exploring the case of low-skilled workers, it also shows the narrow margin of manoeuvre for any possible or desired social action. In the end, we question the responsibility of this action : is it a collective one (of the State or company or an individual one (of the worker ?Este artículo propone una reflexión pluridisciplinaria (médicos laborales y sociólogo sobre la necesidad de prolongar las carreras profesionales, basada en el caso extremo de los trabajadores

  11. Effect of Rare Earth Elements on Anisotropy and Microstructure of Al-Li Alloy 2195 Sheets

    2006-01-01

    For the purpose of decreasing the applied limitation resulting from the anisotropic mechanical property of Al-Li alloy 2195, this study employed a complex heat treatment process, involving the pre-tension, thermo-infiltration of the rare earth element Ce, solution treatment, and artificial aging technology. The results indicate that the infiltration of rare earth element Ce benefits the abatement of anisotropy of Al-Li alloy 2195 sheet, in contrast with that of the normal heat treatment process. The gradient of the Vickers-hardness decreases at least 50% through the thickness, and the tensile strength in the rolling direction also increases significantly. If Ce was infiltrated into the alloy under the optimum pre-deformation, the yield strength (σ0.2) increased by 30 MPa while the tensile strength (σb) enhanced by 25 MPa compared to the rare earth free samples. Meanwhile, the fractography illustrated that the fracture surface of the sample became more desirable.

  12. Study on Damage of High Temperature Plastic Deformation for Al-Li Alloy

    2001-01-01

    The security of use for Al-Li alloy will be greatly influenced by the damage degree of plastic deformation within it at high temperature . Based on continuum damage mechanics theory, the damage evolution of Al-5.44Mg-2.15Li-0.12Zr alloy during plastic deforming at high temperature is simulated by using the damage evolution model of high temperature plastic deformation. The changing rule of its inner damage with deformation temperature, strain rate and strain is gained in this paper. The equation of damage evolution for high temperature plastic deformation is developed, providing an academic basis for the technology of plastic process of Al-Li alloys.

  13. Composition and corrosion resistance of cerium conversion films on 2195Al-Li alloy

    SONG Dong; FENG Xingguo; SUN Mingren; MA Xinxin; TANG Guangze

    2012-01-01

    The Ce conversion films on 2195Al-Li alloy without and with post-treatment were studied and the corrosion resistance was evaluated as well.The surface morphology was observed by scanning electron microscopy (SEN),and the chemical composition was characterized by X-ray photoelectron spectroscopy (XPS).The corrosion behaviors of 2195Al-Li alloy and conversion coating were assessed by means of potentiodynamic polarization curves.The experimental results indicated that after post-treatment the surface quality was improved significantly.According to XPS,the conversion coating after post-treatment was mainly composed of CeO2,Ce2O3,Ce-OH and a little MoO3 and MoO2.The results of potentiodynamic polarization curves revealed that the conversion coating with post-treatment possessed better corrosion resistance than bare alloy and Ce conversion coating without post-treatment.

  14. ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY DURING CORROSION PROCESS OF 8090 Al-Li ALLOY IN EXCO SOLUTION

    J.F. Li; Z.Q. Zheng; C.Y. Tan; S.C. Li; Z. Zhang; J.Q. Zhang

    2004-01-01

    The corrosion behavior and electrochemical impedance spectroscopy ( EIS) features of 8090 Al-Li alloys in EXCO solution were investigated, and the EIS was simulated using an equivalent circuit. At the beginning of immersion in EXCO solution, the EIS is comprised by a depressed capacitive arc at high-mediate frequency and an inductive arc at low frequency, and the inductive component decreases and disappears with immersion time. Once exfoliation or severe pitting corrosion is produced, two capacitivearcs appear in the EIS. These two capacitive arcs are originated from the two parts of the corroded alloy surface, the original flat alloy surface and the new inter-face exposed to the aggressive EXCO solution due to the exfoliation or pitting corrosion.Some corrosion development features of 8090 Al-Li alloys in EXCO solution can be obtained through simulated EIS information.

  15. Cryogenic mechanical properties of low density superplastically formable Al-Li alloys

    Verzasconi, S. L.; Morris, J. W., Jr.

    1989-01-01

    The aerospace industry is considering the use of low density, superplastically formable (SPF) materials, such as Al-Li alloys in cryogenic tankage. SPF modifications of alloys 8090, 2090, and 2090+In were tested for strength and Kahn tear toughness. The results were compared to those of similar tests of 2219-T87, an alloy currently used in cryogenic tankage, and 2090-T81, a recently studied Al-Li alloy with exceptional cryogenic properties (1-9). With decreasing temperature, all materials showed an increase in strength, while most materials showed an increase in elongation and decrease in Kahn toughness. The indium addition to 2090 increased alloy strength, but did not improve the strength-toughness combination. The fracture mode was predominantly intergranular along small, recrystallized grains, with some transgranular fracture, some ductile rupture, and some delamination on large, unrecrystallized grains.

  16. Bulk and Surface Properties of Liquid Al-Li and Li-Zn Alloys

    Trybula, Marcela; Gancarz, Tomasz; Gasior, Wladyslaw; Pasturel, Alain

    2014-11-01

    Physicochemical properties like density, surface tension, and viscosity of liquid binary Al-Li and Li-Zn alloys have been measured using draining crucible method. The experimentally measured surface-tension values have been compared to theoretical results based either on the Butler model or the compound formation model assuming the existence of the most favored A 1 B 2 and A 2 B 3 clusters. Several models for viscosity calculation have been also applied and discussed in confrontation with measured data. Finally, the clustering effects in the liquid Al-Li and Li-Zn alloys have been examined using two microscopic functions, i.e., the concentration fluctuation function in the long-wavelength limit and the Warren-Cowley short-range order parameter.

  17. Allie Abrahamson: APA/APAGS Award for Distinguished Graduate Student in Professional Psychology.

    2014-11-01

    The APA/APAGS Award for Distinguished Graduate Student in Professional Psychology is awarded on an annual basis by the APA Board of Professional Affairs (BPA) and the American Psychological Association of Graduate Students (APAGS) to a graduate student who has demonstrated outstanding practice and application of psychology. A qualified candidate must demonstrate exemplary performance in working with an underserved population in an applied setting or have developed an innovative method for delivering health services to an underserved population. This year there are joint recipients of the award, Allie Abrahamson and Rebeccah A. Bernard. Their vision, creativity, courage, and dedication led them to create the Human Rights Forum at Chestnut Hill College to promote human rights education, awareness, and community service opportunities for doctoral students. Allie Abrahamson's award citation, biography, and a selected bibliography are presented here.

  18. A new high strength and high tolerance-resistance Al-Li alloy

    YANG Shou-jie; LU Zheng; DAI Sheng-long; HAN Ya-fang; YAN Ming-gao

    2006-01-01

    In order to develop a new high strength and high tolerance-resistance Al-Li alloy which can be used in aerospace industry,the effects of microalloying elements such as Mg, Ag, Mn and Zn on the mechanical properties of Al-Cu-Li alloys were studied. The results show that the strengthening effects of Mg+Ag and Mg+Zn additions are higher than those of the individual Mg, Ag or Zn addition. The element Mn can also bring some extent strengthening effects on the alloys, but it has nothing to do with the other microalloying elements present or not. Finally, a new Al-Li alloy with Mg+Zn+Mn additions was developed, which possesses high strength and high tolerance-resistance promising properties for aerospace applications.

  19. Effect of heat treatments on 8090 AlLi alloy pitting susceptibility in sea water

    Beccaria, A.M. [CNR, Genova (Italy). Istituto per la Corrosion Marina dei Metalli; Traverso, P. [CNR, Genova (Italy). Istituto per la Corrosion Marina dei Metalli

    1996-05-01

    The pitting susceptibility of 8090 Al-Li alloy in sea water, after different heat treatments, was investigated. Free corrosion and electrochemical tests were carried out at 25 C, in quiescent sea water at pH=8.2 and dissolved oxygen =6.5 ppm. The microstructure was examined by metallographic microscopy and by X-Ray microdiffractometry, while the corrosion layer was characterized by chemical methods and by Infrared and X-ray photoelectron spectroscopies. The following was observed: . aging treatments lead to a non homogeneous microstructure which increases the average corrosion rate as well as pitting susceptibility; . heat treatments do not affect the average passive film composition; . in all examined states, Al-Li alloy 8090 is subject to localized corrosion which takes place preferentially at the grain boundaries. (orig.)

  20. A Study of Friction Stir Welded 2195 Al-Li Alloy by the Scanning Reference Electrode Technique

    Donford, M. D.; Ding, R. J.

    1998-01-01

    A study of the corrosion of friction stir welded 2195 Al-Li alloy has been carried out using the scanning reference electrode technique (SRET). The results are compared to those obtained from a study of heterogeneously welded samples.

  1. Clinical trials in allied medical fields: A cross-sectional analysis of World Health Organization International Clinical Trial Registry Platform

    S. Kannan

    2016-03-01

    Conclusion: The number of clinical trials done in allied fields of medicine other than the allopathic system has lowered down, and furthermore focus is required regarding the methodological quality of these trials and more support from various organizations.

  2. allied psy308 full course [ all discussions all homework and all modules check understandings] latest 2015

    Laynebaril1

    2017-01-01

     allied psy308 full course [ all discussions all homework and all modules check understandings] latest 2015 Click Link Below To Buy: http://hwcampus.com/shop/psy308-full-course/   module 1   Welcome everyone. As you prepare your discussion question responses throughout the course, I encourage you to interject your thoughts about how these concepts can be applied in 'real life'. Perhaps you have witnessed the application or perhaps you have a question that can fo...

  3. Radical heterosexuality: Straight teacher activism in schools : Does ally-led activism work?

    Leigh Potvin

    2016-06-01

    Here, I explore the efficacy of straight teacher allies, the importance of understanding straight privilege, and the significance of radical heterosexuality for straight people doing LGBTQ activism. Relying on queer theory and decolonizing/Indigenous queer theory, I argue that it is necessary for straight teachers to acknowledge their straight privilege in order to challenge homophobia's companions: heterosexism and heteronormativity. In addressing the latter two covert forms of oppression in schools, teachers and students could shift into deeper, more effective resistance measures.

  4. Challenges in Coalition Unconventional Warfare: The Allied Campaign in Yugoslavia, 1941-1945

    2014-01-01

    JFQ 75, 4th Quarter 2014 Duke, Phil lips, and Conover 129 Challenges in Coalition Unconventional Warfare The Allied Campaign in Yugoslavia , 1941...resistance elements in Yugoslavia . The resistance movement effectively fixed in place 35 German and Italian divisions, consisting of roughly 660,000...mountain headquarters in Yugoslavia on May 14, 1944 (Imperial War Museum) Report Documentation Page Form ApprovedOMB No. 0704-0188 Public reporting

  5. Trends in traumatic limb amputation in Allied Forces in Iraq and Afghanistan

    Duncan Wallace

    2012-01-01

    Background: Limb amputation has been a common injury occurring in the conflicts in Iraq and Afghanistan. Compared to other injuries, less attention has been given to this serious, disabling wound. Purpose: The article describes the Allied military experience of traumatic limb amputation in Iraq and Afghanistan. It intends to inform health care personnel involved in the care of serving military personnel and veterans about the scale of these casualties. Methods: A literature se...

  6. In Situ Assessment of Lattice in an Al-Li Alloy

    Beaudoin, A. J.; Obstalecki, M.; Tayon, W.; Hernquist, M.; Mudrock, R.; Kenesei, P.; Lienert, U.

    2013-01-01

    The lattice strains of individual grains are measured in an Al-Li alloy, AA 2195, using high-energy X-ray diffraction at a synchrotron source. The diffraction of individual grains in this highly textured production alloy was isolated through use of a depth-defining aperture. It is shown that hydrostatic stress, and in turn the stress triaxiality, can vary significantly from grain to grain.

  7. Extended roles for allied health professionals: an updated systematic review of the evidence

    Saxon RL

    2014-10-01

    Full Text Available Robyn L Saxon,1–3 Marion A Gray,1,2 Florin I Oprescu1,2 1School of Health and Sports Sciences, Faculty of Science, Health, Education and Engineering, 2Cluster for Health Improvement, University of the Sunshine Coast, Sippy Downs, QLD, 3Queensland Health, Brisbane, QLD, Australia Background: Internationally, health care services are under increasing pressure to provide high quality, accessible, timely interventions to an ever increasing aging population, with finite resources. Extended scope roles for allied health professionals is one strategy that could be undertaken by health care services to meet this demand. This review builds upon an earlier paper published in 2006 on the evidence relating to the impact extended scope roles have on health care services. Methods: A systematic review of the literature focused on extended scope roles in three allied health professional groups, ie, physiotherapy, occupational therapy, and speech pathology, was conducted. The search strategy mirrored an earlier systematic review methodology and was designed to include articles from 2005 onwards. All peer-reviewed published papers with evidence relating to effects on patients, other professionals, or the health service were included. All papers were critically appraised prior to data extraction. Results: A total of 1,000 articles were identified by the search strategy; 254 articles were screened for relevance and 21 progressed to data extraction for inclusion in the systematic review. Conclusion: Literature supporting extended scope roles exists; however, despite the earlier review calling for more robust evaluations regarding the impact on patient outcomes, cost-effectiveness, training requirements, niche identification, or sustainability, there appears to be limited research reported on the topic in the last 7 years. The evidence available suggests that extended scope practice allied health practitioners could be a cost-effective and consumer

  8. Corrosion Studies of 2195 Al-Li Alloy and 2219 Al Alloy with Differing Surface Treatments

    Danford, M. D.; Mendrek, M. J.

    1998-01-01

    Corrosion studies of 2195 Al-Li and 2219 Al alloys have been conducted using the scanning reference electrode technique (SRET) and the polarization resistance (PR) technique. The SRET was used to study corrosion mechanisms, while corrosion rate measurements were studied with the PR technique. Plates of Al203 blasted, soda blasted and conversion coated 2219 Al were coated with Deft primer and the corrosion rates studied with the EIS technique. Results from all of these studies are presented.

  9. COMPARATIVE STUDY OF POLLEN AND PISTIL IN CROCUS SATIVUS L. (IRIDACEAE) AND ALLIED SPECIES

    P. LAURETTI; D. DI SOMMA; M. GRILLI CAIOLA

    2000-01-01

    Crocus sativus L. is mainly known for the production of the drug saffron. Because of its sterility, it is propagated vegetatively by means of corms. To gain information on the reproductive biology of saffron and allied species, a comparative study on pollen and pistil of Crocus sativus L., C. cartwrightianus Herb., C. thomasii Ten. and C. hadriaticus Herb. was carried out. Pollen and pistils gathered at anthesis were examined by light (LM) and scanning electron microscopy (SEM). Pollen shape ...

  10. Luck Is Not a Strategy: Inefficient Coercion In Operation Allied Force

    2015-12-01

    Service.8 Germany, under the Treaty of Versailles , had no air force, but a number of German officers were busy devising airpower doctrine. These...circumstances, produced much more realistic airpower doctrine. With their military limited by the Treaty of Versailles , rather than battlefield...The North Atlantic Treaty Organization (NATO), dominated by the United States, entered Allied Force without a coherent or complete strategy. Over

  11. Recent Advances in Near-Net-Shape Fabrication of Al-Li Alloy 2195 for Launch Vehicles

    Wagner, John; Domack, Marcia; Hoffman, Eric

    2007-01-01

    Recent applications in launch vehicles use 2195 processed to Super Lightweight Tank specifications. Potential benefits exist by tailoring heat treatment and other processing parameters to the application. Assess the potential benefits and advocate application of Al-Li near-net-shape technologies for other launch vehicle structural components. Work with manufacturing and material producers to optimize Al-Li ingot shape and size for enhanced near-net-shape processing. Examine time dependent properties of 2195 critical for reusable applications.

  12. Building interdisciplinary teamwork among allied health students through live clinical case simulations.

    Buelow, Janet R; Rathsack, Christi; Downs, David; Jorgensen, Kathy; Karges, Joy R; Nelson, Debralee

    2008-01-01

    A limited, yet growing, body of research suggests that health care students educated in interdisciplinary teamwork may become more collaborative professionals in the workplace, which, in turn, may foster more productive and satisfied health care professionals. Researchers also have identified lower mortality and morbidity rates, fewer hospitalizations, decreased costs, and improved function by patients among significant health benefits of interdisciplinary teamwork, especially when it is applied to underserved and geriatric populations. Such positive outcomes have prompted medical schools and accreditation boards of many allied health professions to add interdisciplinary education into their training requirements. Meeting these requirements has challenged universities, where there are multiple allied health programs and limited time, faculty, and financial resources to coordinate interdisciplinary education. The challenges have been magnified by insufficient research on the most effective methods to educate university students about interdisciplinary teamwork. This article presents the background, evolution, and key building blocks of one such method: a simulation-based workshop designed at our university over 7 years to educate its allied health students about various health professions through shared learning, interaction, and collaboration.

  13. Unmanned Aerial Systems in Occupational Hygiene-Learning from Allied Disciplines.

    Eninger, Robert M; Johnson, Robert L

    2015-10-01

    Unmanned Aerial System (UAS) technologies are rapidly developing, lowering cost, and technology barriers for their use in numerous applications. This review and commentary summarizes relevant literature in allied fields and evaluates potential application and utility of UAS technology in the discipline of occupational hygiene. Disciplines closely related to occupational hygiene are moving to investigate potential uses--and in some cases--already employing this technology for research or commercial purposes. The literature was reviewed to formulate a cross-sectional picture of how UAS technology is being used in these closely allied disciplines which could inform or guide potential use in occupational hygiene. Discussed are UAS applications in environmental monitoring, emergency response, epidemiology, safety, and process optimization. A rapidly developing state of the art indicates that there is potential utility for this technology in occupational hygiene. Benefits may include cost savings, time savings, and averting hazardous environments via remote sensing. The occupational hygiene community can look to allied fields to garner lessons and possible applications to their own practice.

  14. Time-Temperature-Precipitation Behavior in Al-Li Alloy 2195

    Chen, P. S.; Bhat, B. N.

    2002-01-01

    Transmission electron microscopy was used to study time-temperature-precipitation (TTP) behavior in aluminum-lithium (Al-Li) 2195 alloy. Al-Li 2195 (nominally Al + 4 percent Cu + 1 percent Li + 0.3 percent Ag + 0.3 percent Mg + 0.1 percent Zr) was initially solutionized for 1 hr at 950 F and then stretched 3 percent. Heat treatments were conducted for up to 100 hr at temperatures ranging from 200 to 1,000 F. TTP diagrams were determined for both matrix and subgrain boundaries. Depending upon heat treatment conditions, precipitate phases (such as GP zone, theta'', theta', theta, delta', T1, TB, and T2) were found in the alloy. The TTP diagrams were applied as a guide to avoid T1 precipitation at subgrain boundaries, as part of an effort to improve the alloy's cryogenic fracture toughness (CFT). New understanding of TTP behavior was instrumental in the development of a two-step artificial aging treatment that significantly enhanced CFT in Al-Li 2195.

  15. Theoretical investigation of the precipitation of δ' in Al-Li

    Khachaturyan, A. G.; Lindsey, T. F.; Morris, J. W.

    1988-02-01

    This paper contains the results of a theoretical investigation of the equilibrium between a disordered fee solution and an Ll2 phase in a model binary alloy and the transformation paths that may be followed when the disordered phase is quenched into the two-phase field. The results are specifically applied to binary Al-Li alloys, in which case the ordered phase is the metastable Al3Li (δ') phase that precipitates from the disordered solid solution (α). The thermodynamic model assumes that the atoms interact in pairs with an interaction potential that is independent of the temperature and composition, and uses the “mean field approximation” for the entropy of mixing. The assumptions confine its applicability to temperatures well below the ordering temperature of the Ll2 phase. The model is used to compute the two-phase field that separates the disordered solution and the Ll2 phase. For the specific case of Al-Li, it provides results that fit the available experimental data and offer a simple explanation for the observed deviation from stoichiometry of the δ' phase. The model predicts that the disordered solution orders congruently on quenching, but is then unstable with respect to decom-position by a spinodal mechanism that leads ultimately to a state of ordered Ll2 precipitates in a disordered matrix. The results provide plausible interpretations for the transformations observed in quenched Al-Li alloys.

  16. Etude des lois de comportement a haute temperature en ``plasticite-fluage'', d'un acier inoxydable austenitique (12 17 SPH)

    Delobelle, P.; Oytana, C.

    1986-07-01

    De façon à compléter une étude antérieure portant sur le fluage à haute température d'un acier inoxydable austénitique du Type 316 (12-17 SPH) et afin de comprendre les relations de couplage qui existent entre les grandes déformations quasiment indépendantes du temps (plasticité) et les petites déformations souvent trés lentes (viscoplasticité), toujours intimement liées pour cet alliage, nous avons réalisé différents essais à vitesse imposée: traction, traction-compression, torsion-alternée., Durant ces essais nous avons estimé l'ordre de grandeur de la contrainte visqueuse σzz = σv par la méthode de la relaxation inverse. De façon à révéler clairement les effets liés intrinsèquement au temps avons réalisé différentes séquences de vieillissement après écrouissage. Pour intégrer et décrire l'ensemble des phénonèmes observés, nous proposons un modèle unifié dont les caractéristiques principales sont les suivantes: (i) Unicité de l'équation d'état viscoplastique: ɛ = f¦σ - α¦, avec f fortement non linéaire, ce qui permet de traduire les effets dépendant et quasiment indépendant du temps. (ii) La distinction entre grande et petite déformations s'effectue à l'aide d'un critére de charge, active ou passive, portant sur la variable α. (iii) Dans l'état de microviscoplasticé, on a α = α1, tel que α 1 présente un fort coefficient d'écrouissage h0. Dans le cas inverse, on décompose α selon α = α1 = α2 + Y et tel que les coefficients d'écrouissage vérifient: H1 + Hα2 ≪ hα1 . (iv) L'effet du temps, permettant d'atteindre l'écoulement stationnaire, indifférent à l'état du système, est pris en compte par les termes de restauration dans les lois d'évolution des variables internes. On présente quelques simulations, réalisées avec le modèle développé, pour différents types de sollicitations.

  17. Improving health services in developing countries with new types of public and allied health personnel.

    Blayney, K D; Trulove, J W

    1982-10-01

    Allied health manpower in developing countries should be able to serve the specific needs of these countries in solving malnutrition, diarrheal disease, and other health problems. Disease patterns tend to evolve in stages with each stage requiring a special type of health manpower: 1) the 1st stage where infectious diseases are linked to poverty, malnutrition, and poor personal hygiene for which personnel trained to improve health through providing safe water supplies, improving sanitation, and immunizing the population are needed; 2) in the 2nd stages, diseases such as cancer, arthritis, and cardiac diseases exist, requiring extensive technology such as is available in the US; and 3) the 3rd stage relates to an awareness of health hazards (caused by the environment, by the lifestyle dysfunctions of the society, and an emphasis on health promotion) and implies a responsibility for one's own health by the individual; this is a difficult stage to apply to developing countries since the ability to bring about change assumes literacy on the part of the population which is not always the case. Since most developing countries need to cause change in the 1st stage, more public health personnel such as sanitarians and generalist workers are needed. Training of these personnel should include on-the-job education; traditionally trained US allied health professionals are not always equipped to deal with health problems in developing countries. Health educators should look to the lessons learned by the US in the allied health movement: 1) the system of control that national membership organizations have over schooling and the job environment has contributed to an increased cost of health care delivery, unnecessary prolonged curricula, overspecialization, extreme protectionism for membership, and inappropriate fractionalization of health care delivery; 2) the emphasis on prolonged curricula sometimes causes the student to lose sight of the supposed direct relationship between

  18. Do structured arrangements for multidisciplinary peer group supervision make a difference for allied health professional outcomes?

    Kuipers P

    2013-10-01

    Full Text Available Pim Kuipers,1,2 Susan Pager,1 Karen Bell,3 Fiona Hall,4 Melissa Kendall2,5,6 1Centre for Functioning and Health Research, Metro South Health, Brisbane, Queensland, Australia; 2Centre for Community Science, School of Human Services, Griffith University, Queensland, Australia; 3Darling Downs Hospital and Health Service, Queensland, Australia; 4Allied Health Professions Office of Queensland, Health Service and Innovation Division, Queensland, Australia; 5Acquired Brain Injury Outreach Service, Metro South Health, Brisbane, Queensland, Australia; 6Transitional Rehabilitation Programme, Metro South Health, Brisbane, Queensland, Australia Abstract: Peer group supervision, particularly in multidisciplinary formats, presents a potential means of providing professional support, and specifically clinical supervision, for allied health professionals. Debate exists regarding the extent to which the activities of these groups should be formalized. Results drawn from an evaluation of a large-scale peer group supervision initiative are described. Analysis of 192 responses from professionals involved in peer groups indicates that participants in groups that used formal documentation – which adopted the tools provided in training, and particularly those that used formal evaluation of their groups – rated their groups as having better processes and greater impact. Interestingly, multidisciplinary peer groups were rated as having similar impacts, processes, and purposes as the more homogenous single-discipline groups. It is concluded that the implementation of formal arrangements enhances the processes and outcomes of peer groups implemented for professional support and clinical supervision. Multidisciplinary membership of such groups is perceived as equally beneficial as single-discipline groups. Keywords: allied health, professional supervision, clinical supervision, professional support, multidisciplinary

  19. Thermal Exposure Effects on Properties of Al-Li Alloy Plate Products

    Shah, Sandeep; Wells, Douglas; Wagner, John; Babel, Henry

    2002-01-01

    Aluminum-Lithium (AL-Li) alloys offer significant performance benefits for aerospace structural applications due to their higher specific properties compared with conventional aluminum alloys. For example, the application of an Al-Li alloy to the space shuttle external cryogenic fuel tank contributed to the weight savings that enabled successful deployment of International Space Station components. The composition and heat treatment of this alloy were optimized specifically for strength-toughness considerations for an expendable cryogenic tank. Time dependent properties related to reliability, such as thermal stability, fatigue, and corrosion, will be of significant interest when materials are evaluated for a reusable cryotank structure. As most aerospace structural hardware is weight sensitive, a reusable cryotank will be designed to the limits of the materials mechanical properties. Therefore, this effort was designed to establish the effects of thermal exposure on the mechanical properties and microstructure of one relatively production mature alloy and two developmental alloys C458 and L277. Tensile and fracture toughness behavior was evaluated after exposure to temperatures as high as 3oooF for up to IO00 hrs. Microstructural changes were also evaluated to correlate with the observed data trends. The ambient temperature parent metal data showed an increase in strength and reduction in elongation after exposure at lower temperatures. Strength reached a peak with intermediate temperature exposure followed by a decrease at highest exposure temperature. Characterizing the effect of thermal exposure on the properties of Al-Li alloys is important to defining a service limiting temperature, exposure time, and end-of-life properties.

  20. Age and gender as predictors of allied health quality stroke care

    Luker JA

    2011-07-01

    Full Text Available Julie A Luker1, Julie Bernhardt2, Karen A Grimmer-Somers11International Centre for Allied Health Evidence, University of South Australia Adelaide, South Australia, Australia; 2School of Physiotherapy, La Trobe University Melbourne, Victoria, Australia and Stroke Division, Florey Neurosciences Institutes Heidelberg Heights, Melbourne, Victoria, AustraliaBackground: Improvement in acute stroke care requires the identification of variables which may influence care quality. The nature and impact of demographic and stroke-related variables on care quality provided by allied health (AH professionals is unknown.Aims: Our research explores the association of age and gender on an index of acute stroke care quality provided by AH professionals.Methods: A retrospective clinical audit of 300 acute stroke patients extracted data on AH care, patients' age and gender. AH care quality was determined by the summed compliance with 20 predetermined process indicators. Our analysis explored relationships between this index of quality, age, and gender. Age was considered in different ways (as a continuous variable, and in different categories. It was correlated with care quality, using gender-specific linear and logistic regression models. Gender was then considered as a confounder in an overall model.Results: No significant association was found for any treatment of age and the index of AH care quality. There were no differences in gender-specific models, and gender did not significantly adjust the age association with care quality.Conclusion: Age and gender were not predictors of the quality of care provided to acute stroke patients by AH professionals.Keywords: acute stroke, allied health, quality of care, age, gender

  1. Improving fatigue property of Al-Li alloy by thermo-mechanical treatment

    丁剑; 张荻; 范同祥; 吕维洁; 覃继宁

    2003-01-01

    Tension-compression fatigue test was performed to study the effect of the cold working + ageing treatment on the fatigue property of Al-Li alloy under stress-controlled condition. The main results show that: fatigue strength of specimen is improved obviously after cold working + ageing treatment; compared to the simple ageing treatment, the necessary ageing time can be reduced apparently to reach the peak-ageing strengthening effect; the fatigue strength of specimen cut from the vertical direction to cold working direction is higher than that cut from the parallel direction.

  2. Guiding principles in a merger of allied health and nursing schools.

    Siler, William L; Royeen, Charlotte Brasic

    2007-01-01

    Mergers have long been a reality in higher education during periods of financial challenge. More recently, academic mergers have evolved to become a strategy for achieving academic excellence, broadening institutional vision, and solidifying the competitive position of the merged entities. This report summarizes literature focused on critical considerations when evaluating and implementing mergers in an academic environment using a conceptual model adapted from Kotter. In addition, this paper reports on the planning and initial 9 months of the merger between the Edward and Margaret Doisy School of Allied Health Professions and the School of Nursing to form the Edward and Margaret Doisy College of Health Sciences at Saint Louis University.

  3. A systematic review of the individual determinants of research evidence use in allied health

    Lizarondo L

    2011-07-01

    Full Text Available L Lizarondo, K Grimmer-Somers, S KumarInternational Centre for Allied Health Evidence, University of South Australia, Adelaide, South Australia, AustraliaBackground: The use of evidence-based practice (EBP is often not reflected in allied health (AH practitioners’ day-to-day practice (the research-practice gap. Research suggests that considerable differences between and within AH disciplines exist, which require different approaches in order to influence practice behavior. It is therefore important to develop a better understanding of what influences individual AH practitioners’ adoption of evidence into daily practice.Objective: This systematic review aims to examine the individual characteristics of AH practitioners which determine their uptake of evidence into practice.Methods: Studies which examined individual factors or variables that influence research evidence use by any AH practitioner were included in the review. The methodological quality of the included papers was assessed using the Quality Assessment and Validity Tool for Cross-sectional Studies. A narrative summary of the findings was presented.Results: Six studies were included and the methodological quality scores indicated that two were weak and the remainder had moderate–weak quality. The review demonstrated that factors such as educational degree or academic qualification, involvement in research or EBP-related activities, and practitioners’ perceptions, attitudes and beliefs about research and EBP are significant predictors of self-reported research evidence use in AH. The effect of other factors such as professional characteristics, clinical setting/work environment, information-seeking behavior and sociodemographic variables are less clear. Whether there is an interaction effect between evidence-uptake factors has not been tested.Conclusion: Improving the research knowledge of clinicians and overcoming negative attitudes toward EBP have the potential to move AH

  4. Effects of Magnetic Field on Fracture of Al-Li Alloy Containing Cerium

    刘兵; 王西宁; 陈铮

    2003-01-01

    The effects of magnetic field on fracture feature and microstructure of Al-Li alloys containing Ce were investigated. Experiment results show that the fracture features and the microstructures are changed with the magnetic field. The fracture surface of the alloys is mainly quasi-cleavage without applying magnetic field. With a magnetic field, the fracture of quasi-cleavage changes to more secondary cracks and less quasi-cleavage plates on fracture surface. Grains become thinner and uniform with applying magnetic field. The influence of magnetic field on atom diffusion was discussed.

  5. Effect of Electric Field on Conductivity and Vickers Hardness of an Al-Li Alloy

    Liu, Bing; Chen, Da-Rong; Chen, Zheng; Wang, Yong-Xin; Li, Xiao-Ling

    2003-11-01

    Static electric fields were applied on an aluminium-lithium alloy during solution treatment. The conductivity and Vickers hardness of the quenched Al-Li alloy is changed with the effect of electric field. The Vickers hardness increases with the applied electric field for a certain solutionizing time but decreases with the time under an electric field. In the absence of the electric field, the Vickers hardness and the conductivity increase synchronously, while reversed after electric field treatment. Positive and negative electric fields had the similar effect. The change of the local electron density in alloy caused by electric field is presented to explain the effect.

  6. Computer Simulation of Ordering and Atom Clustering in Aging Binary Al-Li Alloy

    LI Xiao-ling; CHEN Zheng; WANG Yong-xin; HU Ming-juan

    2004-01-01

    Ordering and atom clustering in aging binary Al-Li alloy has been investigated by computer simulation through calculating the long range order (lro.) parameter and composition deviation order parameter from single-site occupation probabilities of Li atom. The results show that when the alloy lies in metastable region in the phase diagram ordering and atom clustering occur simultaneously. As the composition of the alloy increases ordering occurs earlier than atom clustering gradually. When the alloy lies in instable region atom clustering takes place after the congruent ordering completes. It has also been found that the incubation period of the phase transformation is shortened as the composition increases.

  7. AlliedSignal driver's viewer enhancement (DVE) for paramilitary and commercial applications

    Emanuel, Michael; Caron, Hubert; Kovacevic, Branislav; Faina-Cherkaoui, Marcela; Wrobel, Leslie; Turcotte, Gilles

    1999-07-01

    AlliedSignal Driver's Viewer Enhancement (DVE) system is a thermal imager using a 320 X 240 uncooled microbolometer array. This high performance system was initially developed for military combat and tactical wheeled vehicles. It features a very small sensor head remotely mounted from the display, control and processing module. The sensor head has a modular design and is being adapted to various commercial applications such as truck and car-driving aid, using specifically designed low cost optics. Tradeoffs in the system design, system features and test results are discussed in this paper. A short video shows footage of the DVE system while driving at night.

  8. The photosynthetic capacity in 35 ferns and fern allies: mesophyll CO2 diffusion as a key trait.

    Tosens, Tiina; Nishida, Keisuke; Gago, Jorge; Coopman, Rafael Eduardo; Cabrera, Hernán Marino; Carriquí, Marc; Laanisto, Lauri; Morales, Loreto; Nadal, Miquel; Rojas, Roke; Talts, Eero; Tomas, Magdalena; Hanba, Yuko; Niinemets, Ülo; Flexas, Jaume

    2016-03-01

    Ferns and fern allies have low photosynthetic rates compared with seed plants. Their photosynthesis is thought to be limited principally by physical CO2 diffusion from the atmosphere to chloroplasts. The aim of this study was to understand the reasons for low photosynthesis in species of ferns and fern allies (Lycopodiopsida and Polypodiopsida). We performed a comprehensive assessment of the foliar gas-exchange and mesophyll structural traits involved in photosynthetic function for 35 species of ferns and fern allies. Additionally, the leaf economics spectrum (the interrelationships between photosynthetic capacity and leaf/frond traits such as leaf dry mass per unit area or nitrogen content) was tested. Low mesophyll conductance to CO2 was the main cause for low photosynthesis in ferns and fern allies, which, in turn, was associated with thick cell walls and reduced chloroplast distribution towards intercellular mesophyll air spaces. Generally, the leaf economics spectrum in ferns follows a trend similar to that in seed plants. Nevertheless, ferns and allies had less nitrogen per unit DW than seed plants (i.e. the same slope but a different intercept) and lower photosynthesis rates per leaf mass area and per unit of nitrogen.

  9. On the intergranular fracture behavior of high-temperature plastic deformation of 1420 Al-Li alloy

    2002-01-01

    The tensile deformation hot simulation test of as-cast 1420 Al-Li alloy was performed on Gleeble-1500 Thermal Simulator in the deformation temperature range from 350 to 450 ℃, and the strain rate range from 0.01 to 10.0 s-1.The tensile fracture behavior of the 1420 Al-Li alloy at high temperature was studied experimently. The results show that the tensile fracture mode of the 1420 Al-Li alloy at high temperature is changed from typical transgranular ductile fracture to intergranular brittle fracture with the increase of the deformation temperature and the strain rate. It is made out that the precipitation of LiH is the fundamental reason for the intergranular brittle fracture of the 1420 Al-Li alloy at high temperature. The mechanism of hydrogen embrittlement of the 1420 Al-Li alloy at high temperature was discussed, and it was proposed that the hydrogen embrittlement at high temperature is an integrated function of the dynamic and the static force, which enrichs the theories of hydrogen embrittlement.

  10. A positron study on the microstructural evolution of Al-Li based alloys in the early stages of plastic deformation

    Diego, N. de; Rio, J. del [Univ. Complutense, Madrid (Spain). Dept. de Fisica de Materiales; Romero, R.; Somoza, A. [Univ. Nacional del Centro de la Provincia de Buenos Aires, Tandil (Argentina). Inst. de Fisica de Materiales]|[Comision de Investigaciones Cientificas de la Provincia de Buenos Aires (Argentina)

    1997-11-01

    The formation of voids by coalescence of microvoids initiated at precipitates has been proposed to explain the fracture mechanisms in alloys containing a large number of second phase particles whereas in binary Al-Li alloys with shearable particles the brittleness could be linked with the grain boundary fracture. Most of the microstructure studies of Al-Li alloys have been performed by deforming to fracture; however, little is known about the processes and mechanisms involved in the early stages of plastic deformation. Butler et al. have studied a quaternary Al-Li alloy and have found that there is a critical effective strain to cause voiding, which is about 0.06 and 0.1% for the aged and for the solution treated material respectively. It is very well established that positrons are very sensitive to vacancy-like defects. With the aim of clarifying the behavior of Al-Li based alloys in the very early stages of deformation, and detecting the eventual formation of microvoids, the authors have studied the response of the positron lifetime parameters to the degrees of deformation in age-hardenable Al-Li based alloys plastically deformed under tensile stress.

  11. The electrochemical aspect of the corrosion of austenitic stainless steels, in nitric acid and in the presence of hexavalent chromium (1961); Aspect electrochimique de la corrosion d'aciers inoxydables austenitiques en milieu nitrique et en presence de chrome hexavalent (1961)

    Coriou, H.; Hure, J.; Plante, G. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1961-07-01

    The corrosion of austenitic stainless steels in boiling nitric acid markedly increases when the medium contains hexavalent chromium ions. Because of several redox phenomena, the potential of the steel generally changes in course of time. Measurements show a relation between the weight loss and the potential of specimens. Additions of Mn(VII) and Ce(IV) are compared with that of Cr(VI), and show that the relation is a general one. The attack cf the metal in oxidizing media is largely intergranular, leading to exfoliation of the grains, although the steel studied is not sensitive to the classical Huey and Strauss tests. Also even in the absence of any other oxidizing reaction, the current density observed when the steel is anodically polarized under potentiostatic conditions does not correspond to the actual weight loss of the metal. (authors) [French] La corrosion d'aciers inoxydables austenitiques en milieu nitrique bouillant augmente notablement quand le milieu contient des ions chrome a l'etat hexavalent. Par suite de divers phenomenes d'oxydo-reduction, le potentiel de l'acier evolue generalement au cours du temps. Les mesures effectuees permettent d'etablir une relation entre les pertes de poids et le potentiel des echantillons. L'addition de Mn(VI) et Ce(IV) est compare a celle de Cr(VI) et montre que la relation precedente s'applique de facon generale. L'attaque du metal en milieu oxydant est en grande, partie due a une corrosion intergranulaire conduisant a un dechaussement des grains bien que l'acier etudie ne soit pas sensible aux tests classiques de Huey et de Strauss. Aussi, meme en l'absence de toute autre reaction d'oxydation l'intensite qu l'on observerait en soumettant l'acier a un potentiel anodique dans un montage potentiostatique ne correspondrait pas a la perte de poids reelle du metal. (auteurs)

  12. Variations de résistivité électrique associées aux transformations martensitiques dans l'acier à mémoire de forme FM30

    Bouraoui, Tarak; Tamarat, Karim; Dubois, Bernard

    1996-07-01

    The Fe-31.6wt% Mn-6.45wt% Si (FM30) steel showed forward, reverse and isothermal martensitic transformations. These phenomena were detected by electrical resistance measurements as a function of temperature. The forward transformation failed at the appearance of the antiferromagnetism of the austenitic phase. However, a M_f^{prime} temperature can be considered as a end of evolution. By studying the reverse transformation \\varepsilon to γ, it was shown that the fcc high temperature phase was unstable at 298 K when the quenching temperature was equal or higher than 1073 K. L'acier Fe-31,6Mn-6,45Si (FM30) présente des transformations martensitiques (directe, inverse et isotherme) qui sont mises en évidence par mesure de résistence électrique en température. La transformation directe γ to \\varepsilon est inhibée par l'apparition de l'antiferromagnétisme de la phase γ. Cependant nous avons envisagé une température de fin d'évolution M_f^{prime}. L'étude de la transformation inverse \\varepsilon to γ montre que la phase cfc de haute température est instable à 298 K après trempe depuis des températures égales ou supérieures à 1073 K.

  13. [Educational program in the Medical Science Course, Kitasato University School of Allied Health Sciences].

    Kitasato, Hidero; Takahashi, Shinichiro; Ohbu, Makoto; Obata, Fumiya; Ogawa, Zensuke; Sato, Yuichi; Hattori, Manabu; Saito-Taki, Tatsuo; Hara, Kazuya; Okano, Tetsuroh; Kubo, Makoto; Maruyama, Hiroko; Tsuchiya, Benio; Okazaki, Toshio; Ishii, Naohito; Nishimura, Yukari; Takada, Nobukazu; Abe, Michiko; Hachimura, Kazuo; Tanigawa, Kozo; Katagiri, Masato

    2008-07-01

    The aim of education in the Medical Laboratory Science course, Kitasato University School of Allied Health Sciences, is to bring up train students who have Kitasato spirit, for careers in laboratory medicine of hospital or scientific staff of medical companies or as researchers. General and enlightening education concerning "Kitasato spirit" and professional education composed of major subjects was carried out in the first and during the 2nd and two third of 3rd grade, respectively. Medical practice and research training were alternatively carried out for 6 months between November of the 3rd year and November of the 4th year, in order to gain practical experience. Two problem-based learning (PBL) tutorial courses, "Infectious Diseases Course" and "Team Medical Care--Interprofessional Collaborations" were also carried out at the end of the 3rd and beginning of the 4th years, respectively, in order to convert a memory to knowledge. Team medical care course enrolls 1000 students at the School of Allied Health Sciences, Medicine, Nursing, Pharmacy and Kitasato College Applied Clinical Dietetics Course, is now one of special courses available at our university. This attempt is thought to result in a way of thinking that recognizes the importance of co-operation as a team member and personal contributions to actual team medical care.

  14. Patterns of waste generation, treatment and disposal in the chemical and allied industries in Ghana

    Osei-Wusu Achaw

    2012-09-01

    Full Text Available Environmental pollution and degradation in urban Ghana has been on the increase as a result of the nations drive towards industrialization, a generally weak regulatory regime, and a lack of capacity to manage the environment. This situation is affecting the well-being and livelihood of affected communities. As part of an effort to address the issue, a thirteen (13 item questionnaire was designed and distributed to seventy (70 companies in the chemical and allied industry to solicit and analyze data and information on the their waste management situation. Forty-seven, representing 67.1%, of the distributed questionnaires were completed and returned. The responses were analyzed using tables, percentages and bar charts. The results revealed that while 80.9% of the respondents generate waste as a result of the operation of the plants, 23.3% directly dump their waste into the environment without any prior treatment. Only one company was found that incinerate its waste, and only four (8.5% had comprehensive waste water treatment plants. The low numbers of companies treating the waste they generate prior to disposal means that the chemical and allied industry is contributing to the environmental pollution and degradation in the country.

  15. Trends in traumatic limb amputation in Allied Forces in Iraq and Afghanistan

    Duncan Wallace

    2012-04-01

    Full Text Available Background: Limb amputation has been a common injury occurring in the conflicts in Iraq and Afghanistan. Compared to other injuries, less attention has been given to this serious, disabling wound. Purpose: The article describes the Allied military experience of traumatic limb amputation in Iraq and Afghanistan. It intends to inform health care personnel involved in the care of serving military personnel and veterans about the scale of these casualties. Methods: A literature search of both civilian and military academic databases was conducted. Results: Both the US and UK have incurred very significant numbers of casualties involving traumatic limb amputation, many of whom have suffered multiple limb loss. The rate of blast injuries causing traumatic limb amputation among US forces has increased since the surge of troops in Afghanistan. Dismounted Complex Blast Injury (DCBI consisting of multiple limb amputations with pelvic, abdominal or genito-urinary injuries has been reported as increasing in frequency among US troops in Afghanistan since 2010. Australian Defence Force casualties suffering traumatic limb amputation remain low. Conclusions: Significant casualties involving traumatic limb amputation are likely to continue among Allied troops while current counter-insurgency tactics are continued. Planned troop withdrawals should eventually result in fewer casualties, including reduced numbers of traumatic limb amputation.

  16. Microstructure and low-temperature plastic deformation of Al-Li alloy

    Isaev, N. V.; Zabrodin, P. A.; Spuskanyuk, V. Z.; Davydenko, A. A.; Pustovalov, V. V.; Fomenko, V. S.; Braude, I. S.

    2012-01-01

    Features of the plastic deformation of solid Al-Li solutions with microstructures formed by direct and angular hydroextrusion are studied under tension at temperatures of 4.2-350 K. It is found that the grain size reductions, increases in the average density of defects, and changes in the orientational textures during combined hydroextrusion lead to increased strength and reduced plasticity of the microcrystalline alloy relative to initially large-grained samples. The high yield stress of the microcrystalline alloy is explained by a higher grain density and the evolution of an orientational texture. The strong temperature dependence of the yield stress is typical of thermally activated interactions between dislocations and local obstacles in the form of deformation defects produced during hydroextrusion. The low plasticity of the microcrystalline alloy, which already shows up as a localization of plastic deformation with small deformations, is caused by a low rate of work hardening owing to enhanced dynamic recovery of fine grains even at low temperatures. The rate of dynamic recovery decreases, while uniform deformation increases, at temperatures of 77 K and below. Based on data on the high stress rate sensitivity at temperatures above 77 K and the low activation volume for plastic deformation of microcrystalline Al-Li, it is proposed that high-angle grain boundaries may serve as highly efficient sources and sinks of mobile dislocations.

  17. Mechanistic Study of Delamination Fracture in Al-Li Alloy C458 (2099)

    Tayon, W. A.; Crooks, R. E.; Domack, M. S.; Wagner, J. A.; Beaudoin, A. J.; McDonald, R. J.

    2009-01-01

    Delamination fracture has limited the use of lightweight Al-Li alloys. In the present study, electron backscattered diffraction (EBSD) methods were used to characterize crack paths in Al-Li alloy C458 (2099). Secondary delamination cracks in fracture toughness samples showed a pronounced tendency for fracture between grain variants of the same deformation texture component. These results were analyzed by EBSD mapping methods and simulated with finite element analyses. Simulation procedures include a description of material anisotropy, local grain orientations, and fracture utilizing crystal plasticity and cohesive zone elements. Taylor factors computed for each grain orientation subjected to normal and shear stresses indicated that grain pairs with the largest Taylor factor differences were adjacent to boundaries that failed by delamination. Examination of matching delamination fracture surface pairs revealed pronounced slip bands in only one of the grains bordering the delamination. These results, along with EBSD studies, plasticity simulations, and Auger electron spectroscopy observations support a hypothesis that delamination fracture occurs due to poor slip accommodation along boundaries between grains with greatly differing plastic response.

  18. The effects of zinc addition on the environmental stability of Al-Li alloys

    Kilmer, Raymond J.; Stoner, Glenn E.

    1990-01-01

    It was found that relatively small addition of Zn can improve the stress corrosion cracking (SCC) resistance of Al-Li alloys. However, the mechanism by which this is accomplished is unclear. The role that Zn plays in altering the behavior of Alloy 8090 is investigated. Early results suggest that Zn additions increase the volume fraction of delta(Al3Li) precipitation and differential scanning calorimetry (DSC) on these alloys confirms this. The four alloys studied each had initial compositions lying in the 8090 window and had varying amounts of Zn added to them. Alloy 8090, like other Al-Li alloys, displays a delta' precipitate free zone (PFZ) upon artificial aging along the grain and subgrain boundaries. However Zn additions greatly decreased or eliminated a delta' PFZ after 100 hours at 160 C. This implies that the subgrain boundary precipitation kinetics are being altered and suppressed. Furthermore, there appears to be a window of Zn concentration above which a delta ' PFZ can reappear with the nucleation and growth of a currently unidentified precipitate on the boundaries. Polarization experiments were performed and the results presented. The experiments were performed in deaerated 3.5 w/o NaCl in both as received (T3) condition and at peak aging of 100 hours at 160 C. The aging profile was determined via Vickers Hardness tests.

  19. Working Capital Management Practices In Agricultural/Agro-Allied Quoted Firms

    E. Chuke Nwude

    2016-09-01

    Full Text Available This study investigated the working capital practices of quoted agricultural/Agro-allied firms listed on the Nigerian Stock Exchange (NSE from 2000-2014. Quantitative approach was used to find the working capital practices of the firms. The study discovered that in days-period the sector as a whole was a net credit receiver in time but some of the individual firm ended up in some years as net extenders of credit in time. On monetary value terms the Livestock feeds was the most receiver of net credit with most conservative credit policy, Presco was the most extender of net credit thereby operating the most liberal credit policy. While FTN could be said to have being operating matching credit policy on the average to smoothen the policy over the years, Okomu operated a moderate policy interspersed with aggressive policy. The agricultural/agro-allied sector firms operated a mixture of net credit extenders and receivers in time and value. In all the firms except in Livestock feeds the aggressive working capital investment practices were followed by aggressive working capital financing policy. That is the lower the investment in working capital the lower the amount of current liabilities.

  20. Implementing an ally development model to promote safer schools for LGB youth: a trans-disciplinary approach.

    Zammitt, Kimberly A; Pepperell, Jennifer; Coe, Megan

    2015-01-01

    Lesbian, gay, and bisexual (LGB) students experience ongoing bullying, harassment, and lack of safety in school. Specialized instructional support personnel (SISPs), such as school counselors, school social workers, and school psychologists, are in a unique position to advocate for LGB students and to implement an ally development model. The purpose of this article is to describe the current climate for LGB students, to discuss the current barriers facing SISPs in advocating for change, and to provide a model of ally development for use at each level of the K-12 system.

  1. The Predictive Value of Selected Extrinsic and Intrinsic Indicators of Overall Job Satisfaction in Diagnostic Radiological Technology, Radiation Therapy, and Nuclear Medicine Technology Allied Health Faculty

    Beavers, Gregory S.

    2010-01-01

    Healthcare is the largest industry in the United States and 60 percent of its 14 million workers are in allied health jobs. The need to attract and retain allied health faculty is critical to preparing a competent workforce in healthcare. This study reports the results of a survey of 259 faculty members working in diagnostic radiologic technology,…

  2. Systematic review of knowledge translation strategies in the allied health professions

    Scott Shannon D

    2012-07-01

    Full Text Available Abstract Background Knowledge translation (KT aims to close the research-practice gap in order to realize and maximize the benefits of research within the practice setting. Previous studies have investigated KT strategies in nursing and medicine; however, the present study is the first systematic review of the effectiveness of a variety of KT interventions in five allied health disciplines: dietetics, occupational therapy, pharmacy, physiotherapy, and speech-language pathology. Methods A health research librarian developed and implemented search strategies in eight electronic databases (MEDLINE, CINAHL, ERIC, PASCAL, EMBASE, IPA, Scopus, CENTRAL using language (English and date restrictions (1985 to March 2010. Other relevant sources were manually searched. Two reviewers independently screened the titles and abstracts, reviewed full-text articles, performed data extraction, and performed quality assessment. Within each profession, evidence tables were created, grouping and analyzing data by research design, KT strategy, targeted behaviour, and primary outcome. The published descriptions of the KT interventions were compared to the Workgroup for Intervention Development and Evaluation Research (WIDER Recommendations to Improve the Reporting of the Content of Behaviour Change Interventions. Results A total of 2,638 articles were located and the titles and abstracts were screened. Of those, 1,172 full-text articles were reviewed and subsequently 32 studies were included in the systematic review. A variety of single (n = 15 and multiple (n = 17 KT interventions were identified, with educational meetings being the predominant KT strategy (n = 11. The majority of primary outcomes were identified as professional/process outcomes (n = 25; however, patient outcomes (n = 4, economic outcomes (n = 2, and multiple primary outcomes (n = 1 were also represented. Generally, the studies were of low methodological quality. Outcome

  3. Etude métallurgique du soudage par friction malaxage sur un acier à haute limite élastique destiné à la construction navale : le 80 HLES Metallurgical study of friction stir welding on a steel high yield for shipbuilding: The 80 HLES

    Allart Marion

    2013-11-01

    Full Text Available Le soudage par friction malaxage est un procédé de soudage relativement récent (début des années 90. Il est aujourd'hui utilisé couramment sur des alliages légers mais ne l'est que depuis peu sur les aciers. L'objectif de nos travaux est de chercher à caractériser la microstructure métallurgique et l'état de déformation et de contrainte après soudage par friction malaxage sur des échantillons d'aciers à haute limite élastique utilisés dans l'industrie navale. Nous chercherons à comprendre les phénomènes métallurgiques qui interviennent en cours de soudage. The friction stir welding is a welding process relatively recent (early 90s. It is now commonly used on light alloys but is only recently on steels. The objective of our work is to try to characterize the metallurgical microstructure and state of stress and strain after friction stir welding on samples of high strength steels used in the shipbuilding industry. We seek to understand the metallurgical phenomena that occur during welding.

  4. The South Australian Allied Health Workforce survey: helping to fill the evidence gap in primary health workforce planning.

    Whitford, Deirdre; Smith, Tony; Newbury, Jonathan

    2012-01-01

    There is a lack of detailed evidence about the allied health workforce to inform proposed health care reforms. The South Australian Allied Health Workforce (SAAHW) survey collected data about the demographic characteristics, employment, education and recruitment and retention of allied health professionals in South Australia. The SAAHW questionnaire was widely distributed and 1539 responses were received. The average age of the sample was 40 years; males were significantly older than females, the latter making up 82% of respondents. Three-quarters of the sample worked in the city; 60% worked full time and the remainder in part-time, casual or locum positions. 'Work-life balance' was the most common attraction to respondents' current jobs and 'Better career prospects' the most common reason for intending to leave. Practice in a rural location was influenced by rural background and rural experience during training. A greater proportion of Generation Y (1982-2000) respondents intended to leave within 2 years than Generation X (1961-81) or Baby Boomers (1943-60). Most respondents were satisfied with their job, although some reported lack of recognition of their knowledge and skills. Systematic, robust allied health workforce data are required for integrated and sustainable primary health care delivery.

  5. A Catskill Flora and Economic Botany, I: Pteridophyta. The Ferns and Fern Allies. Bulletin No. 438, New York State Museum.

    Brooks, Karl L.

    The information contained within this guide about flora of the ferns and fern allies of the Catskill Mountains of New York State covers medical and food uses of the plants, as well as the more typical floristic data of keys, drawings, and plant descriptions. (CS)

  6. Kuidas te lapsi kooli olete toonud? / Tõnu Mändveer, Alli Lunter, Anne Änilane .. [jt.

    2011-01-01

    Küsimusele vastasid: Loo keskkooli õpetaja Tõnu Mändveer, Viljandi maagümnaasiumi õpetaja Alli Lunter, Kodila põhikooli direktor Anne Änilane, Jaan Tõnissoni instituudi kodanikuhariduse keskuse juhataja Sulev Valdmaa ja Viljandi Carl Robert Jakobsoni gümnaasiumi õppealajuhataja Kaie Lõhmus

  7. Mida arvate elektroonilistest testidest ja e-hindamisest? / Alli Lunter, Katrin Pihl, Enn Pärtel, Külliki Kask

    2010-01-01

    Küsimustele vastavad Viljandi maagümnaasiumi eesti keele ja kirjanduse õpetaja Alli Lunter, Audentese erakooli õpetaja, inglise keele ainesektsiooni juht Katrin Pihl, TÜ füüsika didaktika lektor Enn Pärtel, Tartu Karlova gümnaasiumi eesti keele ja kirjanduse õpetaja Külliki Kask

  8. Methodological Orientations of Articles Appearing in Allied Health's Top Journals: Who Publishes What and Where

    Alderman, Pamela Lea McCloud

    2012-01-01

    This study examined articles published in the major peer-reviewed journals, either hard copy, web, or both formats, in five allied health professions from January 2006 to December 2010. Research journals used in this study include: "Journal of Dental Hygiene," "Journal of the American Dietetic Association," "Journal of…

  9. Developing eLearning Technologies to Implement Competency Based Medical Education: Experiences from Muhimbili University of Health and Allied Sciences

    Nagunwa, Thomas; Lwoga, Edda

    2012-01-01

    This paper provides the practical experience of developing an eLearning technology as a tool to implement Competency-based Medical Education (CBME) in Tanzania medical universities, with a specific focus on Muhimbili University of Health and Allied Sciences. The paper provides a background to eLearning and the early attempt to adopt it in 2006 at…

  10. The Use of Technical Skill Standards in the Admissions Process for Florida Allied Dental Health Education Programs.

    Hallock, Rita H.

    2001-01-01

    Among 47 respondents from 26 Florida institutions offering allied dental health education programs, 66% have no established technical skill standards for admissions; a sizeable number felt the need for uniform published standards. Although a majority had some knowledge of the Americans with Disabilities Act, 96% responded negatively regarding its…

  11. Attitudes on Barriers and Benefits of Distance Education among Mississippi Delta Allied Health Community College Faculty, Staff, and Students

    Mayfield-Johnson, Susan; Mohn, Richard S.; Mitra, Amal K.; Young, Rebekah; McCullers, Elizabeth M.

    2014-01-01

    Online distance education creates increased opportunities for continuing education and advanced training for allied health professionals living in underserved and geographically isolated areas. The purpose of this article was to explore attitudes on barriers and benefits of distance education technology among underrepresented minority allied…

  12. Comparative Analysis of Al-Li Alloy and Aluminum Honeycomb Panel for Aerospace Application by Structural Optimization

    Naihui Yu

    2015-01-01

    Full Text Available Al-Li alloy and aluminum honeycomb panel (AHP are both excellent materials for aeronautical structures. In this paper, a plate-type aeronautical structure (PAS, which is a base mounting structure for 172 kg functional devices, is selected for comparative analysis with different materials. To compare system-level performance under multidisciplinary constraints, mathematical models for optimization are established and then structural optimization is carried out using Altair OptiStruct. For AHP, its honeycomb core is regarded as orthotropic material and its mechanical properties are calculated by Allen’s model in order to establish finite element model (FEM. The heights of facing sheet and honeycomb core are selected as design variables for size optimization. For Al-Li alloy plate, topology optimization is carried out to obtain its most efficient load path; and then a reconstruction process is executed for practical manufacturing consideration; to obtain its final configuration, accurate size optimization is also used for reconstructed model of Al-Li alloy plate. Finally, the optimized mass and performance of two PASs are compared. Results show that AHP is slightly superior to Al-Li alloy.

  13. Evaluation of Engineering Properties of AL-Li Alloy X2096-T8A3 Extrusion Products

    Flom, Y.; Viens, M.; Wang, L.

    1999-01-01

    Mechanical, thermal fatigue and stress corrosion properties were determined for the two lots of Al-Li X2096-T8A3 extruded beams. Based on the test results, the beams were accepted as the construction material for fabrication of the Hubble Space Telescope new Solar Array Support Structure.

  14. Al-Li alloy AA2198's very high cycle fatigue crack initiation mechanism and its fatigue thermal effect

    Xu, Luopeng; Cao, Xiaojian; Chen, Yu; Wang, Qingyuan

    2015-10-01

    AA2198 alloy is one of the third generation Al-Li alloys which have low density, high elastic modulus, high specific strength and specific stiffness. Compared With the previous two generation Al-Li alloys, the third generation alloys have much improved in alloys strength, corrosion resistance and weldable characteristic. For these advantages, the third generation Al-Li alloys are used as aircraft structures, such as C919 aviation airplane manufactured by China and Russia next generation aviation airplane--MS-21. As we know, the aircraft structures are usually subjected to more than 108 cycles fatigue life during 20-30 years of service, however, there is few reported paper about the third generation Al-Li alloys' very high cycle fatigue(VHCF) which is more than 108 cycles fatigue. The VHCF experiment of AA2198 have been carried out. The two different initiation mechanisms of fatigue fracture have been found in VHCF. The cracks can initiate from the interior of the testing material with lower stress amplitude and more than 108 cycles fatigue life, or from the surface or subsurface of material which is the dominant reason of fatigue failures. During the experiment, the infrared technology is used to monitor the VHCF thermal effect. With the increase of the stress, the temperature of sample is also rising up, increasing about 15 °C for every 10Mpa. The theoretical thermal analysis is also carried out.

  15. 40 CFR 63.11601 - What are the standards for new and existing paints and allied products manufacturing facilities?

    2010-07-01

    ... products manufacturing facilities? (a) For each new and existing affected source, you must comply with the... 40 Protection of Environment 14 2010-07-01 2010-07-01 false What are the standards for new and existing paints and allied products manufacturing facilities? 63.11601 Section 63.11601 Protection...

  16. Student Perceptions and Learning Outcomes of Blended Learning in a Massive First-Year Core Physiology for Allied Health Subjects

    Page, Janelle; Meehan-Andrews, Terri; Weerakkody, Nivan; Hughes, Diane L.; Rathner, Joseph A.

    2017-01-01

    Evidence shows that factors contributing to success in physiology education for allied health students at universities include not only their high school achievement and background but also factors such as confidence with their teachers and quality of their learning experience, justifying intensive and continued survey of students' perceptions of…

  17. Species of lichenized and allied fungi new to Białowieża Large Forest (NE Poland

    Krystyna Czyżewska

    2014-08-01

    Full Text Available The paper presents 38 species of lichenized and allied fungi new to Białowieża Large Forest. 24 taxa of lichenized Ascomycota and 14 taxa of lichenicolous and saprobic fungi are the result of the analysis of collected materials as well as additional field studies.

  18. Becoming an Academic: The Reconstruction of Identity by Recently Appointed Lecturers in Nursing, Midwifery and the Allied Health Professions

    Smith, Caroline; Boyd, Pete

    2012-01-01

    This study investigates the workplace learning experiences of recently appointed lecturers in UK higher education in nursing, midwifery and the allied health professions. Health care practitioners, appointed to academic posts in Universities, are experts in their respective clinical fields and hold strong practitioner identities developed through…

  19. Evaluation of a supplementary retention program for black allied health sciences students.

    Hesser, A; Lewis, L; Abbott, B; Vericella, B

    1993-01-01

    The Medical College of Georgia's (MCG's) Minority Academic Advising Program (MAAP), which began in 1984, is a supplementary retention program for Black students. This paper describes an evaluation study of the effectiveness of MAAP within the MCG School of Allied Health Sciences (SAHS). The study sample consisted of 89 Black students who enrolled in the SAHS from fall 1978 to fall 1982 (preMAAP period) plus 129 Black students who entered the SAHS from fall 1984 through fall 1988 (MAAP period). The comparison group consisted of all other students who entered the SAHS (n = 1,884) within those same time periods. Using an evaluation design produced by merging a quasi-experimental and a time-series design, the authors found that the MAAP succeeded in increasing both the Black student retention-to-graduation rate and the time-persisted-in-program, to the extent that Black students achieved parity with other SAHS students.

  20. Pedagogy of the Privileged: Review of Deconstructing Privilege: Teaching and Learning as Allies in the Classroom.

    Toporek, Rebecca L

    2014-08-11

    As scholarship and research in multicultural psychology evolves to a multilayered and complex discipline, increased attention to the role of larger structural forces of privilege has come to the forefront. Intersectionality of sociopolitical identities and the role those with privilege have in confronting oppression becomes a critical component of multicultural education. The edited volume, Deconstructing Privilege: Teaching and Learning as Allies in the Classroom (Case, 2013) provides concrete guidance and examples for educators seeking to enhance their approach to teaching privilege as a necessary mirror of oppression. This review highlights strengths of the book for educators in psychology and suggests recommendations for more complex discussion of the integration of privilege within the framework of structural oppression. (PsycINFO Database Record (c) 2014 APA, all rights reserved).

  1. Effect of current pulses on fracture morphology in superplastic deformation of 2091 Al-Li alloy

    1999-01-01

    The effect of current pulses on the fracture morphology in the superplastic deformation of 2091 AlLi alloy at two kinds of initial strain rate ((ε)1 = 3.33 × 10 -3 s-1;(ε)2= 3.33 × 10-2 s- 1 ) was investigated. Experimental results show that current pulse turns fracture of superplastic deformation at low strain rate from local interior fracture morphology to typical fracture by growth and interlinkage of cavities, and at high strain rate from rough grain boundary surface to smooth grain boundary surface. It is indicated that the characteristic, that current pulse promotes atomic diffusion, maintains an equiaxial grain microstructure at low strain rate, and accelerates the development of diffusional type of cavity and relaxes stress concentration at triple junction of grain boundaries at high strain rate, and makes the superplastic deformation at two kinds of strain rate show a normal superplastic fracture morphology.

  2. A review of Luxiaria Walker and its allied genus Calletaera Warren (Lepidoptera, Geometridae, Ennominae) from China.

    Jiang, Nan; Xue, Dayong; Han, Hongxiang

    2014-08-21

    The genus Luxiaria Walker and its allied genus Calletaera Warren in China, including 16 species in all, are reviewed. Five new species are described: C. obvia sp. nov., C. acuticornuta sp. nov., C. rotundicornuta sp. nov., C. dentata sp. nov., C. trigonoprocessus sp. nov. The species L. acutaria (Snellen, 1877) and L. tephrosaria (Moore, 1868) are newly recorded for China. Two new combinations are established: C. obliquata (Moore, 1888) comb. nov. and C. consimilaria (Leech, 1897) comb. nov. Four new synonyms are established: Eutoea Walker, 1860 (= Bithiodes Warren, 1894 syn. nov.); Calletaera Warren, 1895 (=Bithiodes Warren, 1899 syn. nov.), based on the fixation of nominal type Acidalia inexactata Walker, 1861, for the genus name Bithiodes Warren, 1894; L. emphatica Prout, 1925 (= L. costinota Inoue, 1978 syn. nov.); C. subexpressa (Walker, 1861) (= C. digrammata Wehrli, 1925 syn. nov.). Diagnoses for all Chinese species are provided. Illustrations of external features and genitalia are presented. 

  3. Allied fractal - Signal 731-40 engines to HE. Mr. Dr-HC Jakob OETAMA''

    Maksoed, Wh-

    2016-10-01

    Firstly :*) Boeing 85% probability wind 4 Pax-ISA conditions NBAA for `highly efficient AlliedSignal 731-40 engines of SpX, herewith adopts Beeckman -D to Beechjet 400A usually used by HE. Mr. Prof. Dr-Ing B.J. HABIBIE by ``per se''. For ``Fractal signals & Space-time Cartoons'' planned to be presented April 17, 2016 in SouthFoyer Room , Salt Lake City- UTAH, the US ever retrieved M. Riebe, et al.: Deterministic Quantum Teleportation with Atoms'', NPG-2004. Further, for poetic `fractal Heart' in an coincidences are ``the hardest thing in the World to understand is the income TAX'' notion from Albert Einstein to ``TinTin'' through Gilles Holst & ``dimer Holstein'' as well as took a terms of reference of Liu & Zhang: Adiabatic Limits & Foliations'' to relates infinite Hund coupling to suji leafs of dracaena angustifolia courtesies of Willybrordus Surendra Rendra. Heartfelt Gratitudes to HE. Mr. Prof. Ir. HANDOJO.

  4. Building competency in the novice allied health professional through peer coaching.

    Ladyshewsky, Richard K

    2010-01-01

    The development of competence is an ongoing journey, and one that is particularly punctuated in the early part of a health professional's career. These novice practitioners need to recognize that the challenges inherent in building competency might be resolved more readily by engaging with peers. This paper outlines what it means to be a novice practitioner, and how peer coaching can be used to support professional development in the allied health sciences. An overview of the reasoning process and how peer coaching and experiential learning can be used to build competence is described. A structured and formal approach to peer coaching is outlined in this paper. Novices who embrace this professional development strategy will find the model of coaching practice and underlying strategies described in this paper beneficial to their experience. The importance of formalizing the process and the underlying communication skills needed for coaching are described in detail with accompanying examples to illustrate the model in practice.

  5. Characterization of the precipitates in Al-Li(8090) alloy using thermal measurements and TEM examinations

    Gaber, A.; Afify, N.

    2002-04-01

    Variation of thermophysical properties of Al-Li (8090) quenched from the solid solution state (803 K) during heating (10 K/min) has been used to determine the temperatures at which the phase transformations take place. Transmission electron microscopic examinations were used to characterize the developed precipitates. It has been shown that the thermal properties can be used as a powerful tool for detecting phase transformations. Microstructural examinations after aging at 373, 438, 563 and 673 K revealed the formation of GP zones, δ‧-(Al 3Li), T B-(Al 7Cu 4Li) and T 2-(Al 6CuLi 3) precipitates, respectively. δ‧-particles and T B-(Al 7Cu 4Li) were observed to be nucleated intragranularly, whereas T 2-particles were observed to grow on the grain boundaries.

  6. Influence of grain orientations on the initiation of fatigue damage in an Al-Li alloy.

    Taylor; Zhai; Wilkinson; Martin

    1999-09-01

    The variation in microstructure and texture in a rectangular bar extruded from a billet of spray-cast 8090 Al-Li alloy has been examined. The fine grain size of the as sprayed billet and the moderate extrusion ratio ( approximately 25 : 1) were seen to cause geometric dynamic recrystallization (GDR) in regions of higher strain towards the edge of the bar. The grain morphology varied from the expected elongated grains at the centre of the bar to equiaxed grains where GDR occurred at the bar edges. A + double fibre texture, significantly distorted towards rolling components and varying through the bar thickness, was found using electron backscatter diffraction. Fatigue resulted in a high density of short secondary cracks, many of which had arrested at grain boundaries. The cracks preferentially nucleated in grains from the fibre texture corresponding to high Schmid factors.

  7. Effect of two-stage aging on superplasticity of Al-Li alloy

    LUO Zhi-hui; ZHANG Xin-ming; DU Yu-xuan; YE Ling-ying

    2006-01-01

    The effect of two-stage aging on the microstructures and superplasticity of 01420 Al-Li alloy was investigated by means of OM, TEM analysis and stretching experiment. The results demonstrate that the second phase particles distributed more uniformly with a larger volume fraction can be observed after the two-stage aging (120 ℃, 12 h+300 ℃, 36 h) compared with the single-aging(300 ℃, 48 h). After rolling and recrystallization annealing, fine grains with size of 8-10 μm are obtained, and the superplastic elongation of the specimens reaches 560% at strain rate of 8×10-4 s-1 and 480 ℃. Uniformly distributed fine particles precipitate both on grain boundaries and in grains at lower temperature. When the sheet is aged at high temperature, the particles become coarser with a large volume fraction.

  8. Strength and microstructure of 2091 Al-Li alloy TIG welded joint

    2000-01-01

    The microstructure and tensile properties of TIG welding joints of 2091 Al-Li alloy were investigated both in as-welded and different postweld heat treatment condition. The results show that solution strengthening played an important role in the as-welded condition, though the precipitation strengthening δ' phase formed already in the as-welded weld metal, but its effect was not apparent due to the lower volume fraction of δ' phase. So the strength coefficient (φ) of the welded joint/base metal was 64%. After artificially aging heat treatment, the precipitation strengthening effect increased much due to the formation of more δ' phase and s' phase. Its φ value was increased up to 89%. The highest strength of the welded joints was obtained after solid solution and then artificially aged heat treatment. Due to the proper size of precipitation strengthening phases and their well distribution, the φ value was increased up to 98%.

  9. Investigation of exfoliation corrosion of rolled AA8090 Al-Li alloy using electrochemical impedance spectroscopy

    李劲风; 张昭; 曹发和; 程英亮; 张鉴清; 曹楚南

    2003-01-01

    The exfoliation morphologies and electrochemical impedance spectroscopy (EIS) features of as-received rolled AA8090 Al-Li alloy in EXCO solution were studied. The EIS was simulated using an equivalent circuit. The results show that once the exfoliation occurs, the EIS is composed of two capacitive arcs at high frequency and mediate-low frequency; among them, the capacitance corresponding to high frequency (C1) is originated from original flat alloy surface, while the capacitance corresponding to mediate-low frequency (C2) from new interface exposed to EXCO solution due to the exfoliation and the ratio of C2 to C1 increases with exfoliation degree. It is advanced that the exfoliation degree can be quantitatively judged through this ratio.

  10. Contribution of archaeological analogs to the estimation of average corrosion rates and long term corrosion mechanisms of low carbon steel in soil; Apport des analogues archeologiques a l'estimation des vitesses moyennes et a l'etude des mecanismes de corrosion a tres long terme des aciers non allies dans les sols

    Neff, D

    2003-11-15

    In the context of the French nuclear waste storage, a multi-barriers disposal is envisaged. Wastes could be put in metallic overpacks disposed in a clay soil. As these overpacks could be made of low carbon steel, it is important to understand the corrosion behaviour of this material in soil during period of several centuries. Indeed, it is necessary to consolidate the empirical data by a phenomenological approach. This includes laboratory experiments and modelling of the phenomenon which have to be validated and completed by the study of archaeological artefacts. This was the aim of this PhD-work. To this purpose, an analytical protocol has been elaborated: about forty archaeological artefacts coming from five dated sites (2. to 16. centuries) have been studied on cross section in order to observe on the same sample all the constituents of the system: metallic substrate/corrosion products/environment. The corrosion products are divided into two zones: the Dense Product Layer (DPL) in contact with the metal, and the Transformed Medium (TM) which are the corrosion products formed around soil minerals (quartz grains). The metallic substrate has been studied by the classical methods of materials science (optical and scanning electron microscope, energy and wavelength dispersive spectroscopies). It has been verified that despite their heterogeneity of structure and composition, they are all hypo-eutectoids steels that can contain phosphorous until 0.5 wt%. The corrosion products have been analysed by local structural analytical methods as micro-diffraction under synchrotron radiation ({mu}XRD) and Raman micro-spectroscopy. These two complementary techniques and also the elemental composition analysis conducted to the characterisation of the corrosion forms. On the majority of the samples coming from four sites, the DPL are constituted by goethite including marbles of magnetite/maghemite. On the artefacts from the fifth site, a particular corrosion form has been identified. This corrosion form, constituted among others by a siderite layer is due to a particular environment: waterlogged soil containing wood. In the whole, analyses conducted in the TM show that it is composed of goethite badly crystallized in comparison with those of the DPL. Moreover, in this zone, the average elemental iron amount decreases progressively from the metal to the soil in which it stabilizes. In order to know the behaviour of the identified phases in soil water, some thermodynamic data have been involved to calculate their solubility in function of pH, potential and various water composition. The first conclusion concerns the influence of the composition and the structure of the material which is not important for the corrosion behaviour. From the results, some hypothesis have been formulated on the long term corrosion mechanisms of hypo-eutectoids steels in the considered environment. The role of the cracks formed in the DPL during the burial was evidenced. Moreover, these corrosion products undertake a dissolution in the soil water and a reprecipitation, explaining the progressive decrease of the iron amount in the TM. Lastly, some average corrosion rates have been measured with the help of the analytical and thermodynamic results: they do not exceed 4 {mu}m/year. (author)

  11. A new checklist of lichenised, lichenicolous and allied fungi reported from South Africa

    Alan M. Fryday

    2015-03-01

    Full Text Available Background: The last comprehensive list of lichenised, lichenicolous and allied fungi reported from South Africa was published in 1950. A checklist is important to provide basic information on the extent of the diversity, and to provide the most recent name and classification.Objective: To present a list of all the lichenised, lichenicolous and allied fungi reported from South Africa.Methods: The list presented is entirely literature based and no attempt has been made to check the report of any taxa or their status by checking the specimens upon which they are based. Firstly, all taxa that were not reported from within the modern boundaries of South Africa were excluded. Next, the Recent literature on lichens database was searched for literature on South African lichens since 1945 and all references checked for new species or new reports, which were then added to the list. These names were then checked against Index Fungorum to ensure that the most current name was being used. Finally, the list was rationalised by excluding all synonyms and dubious infraspecific taxa.Results: The current list includes 1750 taxa in 260 genera from mainland South Africa, with an additional 100 species and 23 genera from the sub-Antarctic Prince Edward Islands, which are treated separately. The replacement name Verrucaria dagolavii Fryday is proposed for Verrucaria umbilicata Øvstedal.Conclusion: It is estimated that, when fully explored, the lichen biota of South Africa will consist of somewhere between 2500 and 3000 taxa.

  12. Economic efficiency in fish farming: hope for agro-allied industries in Niagara

    Kareem, R. O.; Dipeolu, A. O.; Aromolaran, A. B.; Williams, S. B.

    2008-02-01

    The challenge to increase the efficiency in food production level in Nigeria appears to be more urgent now than it has ever been in the history of the country. This is in view of the rapidly increasing population, the imminent decline in international economic and food aid and the need to conserve foreign exchange earnings through the production of raw materials to feed the growing industrial sector calls for urgent attention. The study was carried out in Ogun State. The descriptive statistics was used to determine the socio-economic characteristics of the respondents. The stochastic frontiers production analysis was applied to estimate the technical, allocative efficiency and economic efficiency among the fish farmers in the state. The results of economic efficiency revealed that fish farming is economically efficient with a range of between 55% and 84% efficiency level suggesting a favourable hope for the agro-allied industry such as poultry and cottage industries etc in the state. The result of hypothesis of inefficiency sources models showed that years of experience of fish farmers is significant at 1% probability level indicating the factor contributing to the fish farming experience in the state. Thus, the efficiency is due to the fact that farmers are experienced and fairly educated. On the basis of findings, policy is suggested to be directed towards the encouragement of entrepreneurs in fish farming in the state by providing enabling environment like credit facilities, public enlightenment programme and provision of social amenities like feeder roads, pipe-born water etc and given the fact that an increase in the level of formal education variable leads to less inefficiency, government policy should be focused on adopting the best technology (e.g. fast growing species and equipment) so as to improve the level of efficiency and investment which shall eventually lead to growth in output of fish farming and a lead to the establishment of agro-allied

  13. Argentina as an Extra Ally of the United States in NATO

    Ezequiel Reficco

    1998-09-01

    Full Text Available Few months ago, the United States of America and Argentina signed the agreements to become official allies. Although every alliance is a bilateral fact, it is obvious in this case that it was Argentina that approached the U.S. first and not vice-versa. How can it be explained that a peripheral country, with a long tradition of isolationism, and even confrontation with the Washington, came to be this northern neighbor’s ally? Such a decision was not improvised, rather it was the result of a prolonged process of readjustment in Argentina’s foreign policy. To begin to explain this readjustment, three distinct levels of analysis should be undertaken.The first, the broadest, refers to changes in the international system that affected the way Argentina conceived of its foreign policy. The end of bipolarity altered the equation of costs and benefits of Argentinean diplomacy, raising the costs of isolationism and increasing the incentives for a new bilateral relation with Washington. The second level is more demarcated and refers to the events which influenced Argentinean society and its leadership: the profound transformation of this country’s political culture. A series of values that were absolutely unpopular when the transition to democracy began had become, by the end of the decade, mute points in the process leading to a democratic consensus. The change in the political culture was decisive in the construction of the new foreign policy. The third level of analysis is the most specific: the ideas and leadership style of President Carlos Menem. Though the vision and ideas of this Peronist leader have been fundamental in the decision to establish closer relations with Washington, his decisions are not explicable without reference to the other variables mentioned above.

  14. Effects of Annealing Process on the Formability of Friction Stir Welded Al-Li Alloy 2195 Plates

    Chen, Po-Shou; Bradford, Vann; Russell, Carolyn

    2011-01-01

    Large rocket cryogenic tank domes have typically been fabricated using Al-Cu based alloys like Al-Cu alloy 2219. The use of aluminum-lithium based alloys for rocket fuel tank domes can reduce weight because aluminum-lithium alloys have lower density and higher strength than Al-Cu alloy 2219. However, Al-Li alloys have rarely been used to fabricate rocket fuel tank domes because of the inherent low formability characteristic that make them susceptible to cracking during the forming operations. The ability to form metal by stretch forming or spin forming without excessive thinning or necking depends on the strain hardening exponent "n". The stain hardening exponent is a measure of how rapidly a metal becomes stronger and harder. A high strain hardening exponent is beneficial to a material's ability to uniformly distribute the imposed strain. Marshall Space Flight Center has developed a novel annealing process that can achieve a work hardening exponent on the order of 0.27 to 0.29, which is approximately 50% higher than what is typically obtained for Al-Li alloys using the conventional method. The strain hardening exponent of the Al-Li alloy plates or blanks heat treated using the conventional method is typically on the order of 0.17 to 0.19. The effects of this novel annealing process on the formability of friction stir welded Al-Li alloy blanks are being studied at Marshall Space Flight Center. The formability ratings will be generated using the strain hardening exponent, strain rate sensitivity and forming range. The effects of forming temperature on the formability will also be studied. The objective of this work is to study the deformation behavior of the friction stir welded Al-Li alloy 2195 blank and determine the formability enhancement by the new annealing process.

  15. Behaviour comparison of various flux cored wires in FCAW on austenitic stainless steel; Comparaison du comportement de differents fils fourres en soudage MIG/MAG sur acier inoxydable austenitique

    Legoeuil, N. [Stagiaire/AREVA NP Tour AREVA, 92084 - Paris La Defense cedex, (France)

    2007-07-01

    This study deals with the GMAW process evaluation for the orbital butt welding of strong thickness pipings, in order to increase the productivity of these operations (higher deposition rate than in GTAW, process currently used). The main goal of this project is to evaluate the operational feasibility of mechanized orbital welding under gas protection in narrow gap with stainless flux cored wire 308L on stainless steel 304L. The study was composed of two parts with firstly a bibliographical research which has allowed to underline this operation practice, as good with rutile flux cored wire in smooth mode as with metal cored wire in pulsed mode. In the second part, flat and in position welding tests, by unit cords and filling of narrow grooves, made possible to define preliminary welding parameters. (author) [French] Cette etude s'inscrit dans le cadre de l'evaluation du procede MIG/MAG pour le soudage orbital bout a bout de tuyauteries de forte epaisseur, afin d'augmenter la productivite de ces operations (taux de depot plus eleve qu'en TIG, procede utilise actuellement). L'objectif du projet est d'evaluer la faisabilite operatoire du soudage orbital sous protection gazeuse en chanfrein etroit en mode mecanise avec fil fourre inoxydable 308L sur acier inoxydable 304L. L'etude s'est deroulee en deux parties avec dans un premier temps une recherche bibliographique qui a permis de mettre en evidence la pratique de cette operation, aussi bien avec des fils fourres rutiles en regime lisse qu'avec des fils fourres a poudre metallique en regime pulse. Dans un second temps, des essais de soudage a plat et en position, en cordons unitaires et en remplissage de chanfreins etroits, ont permis de definir des parametres preliminaires de soudage. (auteur)

  16. Application de la diffraction des rayons X in situ à haute température pour l'identification d'une nouvelle phase lors de l'oxydation à 900circC de l'acier 304

    Riffard, F.; Buscail, H.; Caudron, E.; Cueff, R.; Issartel, C.; El Messki, S.; Perrier, S.

    2004-11-01

    Une nouvelle interprétation du comportement atypique couramment appelé "breakaway" observé lors de l'oxydation à haute température d'alliages chromino-formeurs est proposée grâce à l'utilisation de la diffraction des rayons X in situ à haute température. L'acier chromino-formeur AISI 304 doit établir une couche d'oxyde superficielle généralement dense et majoritairement, constituée de chromine, dont la vitesse de croissance est lente, afin d'assurer sa protection contre la corrosion à haute température. Cette faible vitesse de croissance de la couche d'oxyde est effectivement observée à 1000circC. Elle serait favorisée par l'établissement d'une couche de chromine induite par la présence d'une sous-couche continue de silice à l'interface interne. Cette dernière limiterait la diffusion du fer. Le phénomène du "breakaway" est observé à la température de 900circC après 40 heures d'oxydation. Ce phénomène serait lié à la croissance initiale d'oxydes contenant du fer. L'oxyde Fe{7}SiO{10, }a été identifié{ }pour la première fois grâce à la technique de diffraction des rayons X in situ à haute température. Cet oxyde semble piéger le silicium dans la couche d'oxyde, empêchant son accumulation à l'interface interne et la formation d'une couche continue de silice.

  17. Economic efficiency in fish farming:hope for agro-allied industries in Niagara

    R.O.KAREEM; A.O.DIPEOLU; A.B.AROMOLARAN; S.B.WILLIAMS

    2008-01-01

    The challenge to increase the efficiency in food production level in Nigeria appears to be more urgent now than it has ever been in the history of the country.This is in view of the rapidly increasing population,the imminent decline in international economic and food aid and the need to conserve foreign exchange earnings through the production of raw materials to feed the growing industrial sector calls for urgent attention.The study was carried out in Ogun State.The descriptive statistics was used to determine the socio-economic characteristics of the respondents.The stochastic frontiers production analysis was applied to estimate the technical,allocative efficiency and economic efficiency among the fish farmers in the state.The results of economic efficiency revealed that fish farming is economically efficient with a range of between 55% and 84% efficiency level suggesting a favourable hope for the agro-allied industry such as poultry and cottage industries etc in the state.The result of hypothesis of inefficiency sources models showed that years of experience of fish farmers is significant at 1% probability level indicating the factor contributing to the fish fanning experience in the state.Thus,the efficiency is due to the fact that farmers are experienced and fairly educated.On the basis of findings,policy is suggested to be directed towards the encouragement of entrepreneurs in fish farming in the state by providing enabling environment like credit facilities,public enlightenment programme and provision of social amenities like feeder roads,prpe-born water etc and given the fact that an increase in the level of formal education variable leads to less inefficiency,government policy should be focused on adopting the best technology (e.g.fast growing species and equipment)so as to improve the level of efficiency and investment which shall eventually lead to growth in output of fish farming and a lead to the establishment of agro-allied industries in the state.

  18. Applications of Latent Growth Mixture Modeling and allied methods to posttraumatic stress response data

    Isaac R. Galatzer-Levy

    2015-03-01

    Full Text Available Background: Scientific research into mental health outcomes following trauma is undergoing a revolution as scientists refocus their efforts to identify underlying dimensions of health and psychopathology. This effort is in stark contrast to the previous focus which was to characterize individuals based on Diagnostic and Statistical Manual of Mental Disorders (DSM diagnostic status (Insel et al., 2010. A significant unresolved issue underlying this shift is how to characterize clinically relevant populations without reliance on the categorical definitions provided by the DSM. Classifying individuals based on their pattern of stress adaptation over time holds significant promise for capturing inherent inter-individual heterogeneity as responses including chronicity, recovery, delayed onset, and resilience can only be determined longitudinally (Galatzer-Levy & Bryant, 2013 and then characterizing these patterns for future research (Depaoli, Van de Schoot, Van Loey, & Sijbrandij, 2015. Such an approach allows for the identification of phenominologically similar patterns of response to diverse extreme environmental stressors (Bonanno, Kennedy, Galatzer-Levy, Lude, & Elfstom, 2012; Galatzer-Levy & Bonanno, 2012; Galatzer-Levy, Brown, et al., 2013; Galatzer-Levy, Burton, & Bonanno, 2012 including translational animal models of stress adaptation (Galatzer-Levy, Bonanno, Bush, & LeDoux, 2013; Galatzer-Levy, Moscarello, et al., 2014. The empirical identification of heterogeneous stress response patterns can increase the identification of mechanisms (Galatzer-Levy, Steenkamp, et al., 2014, consequences (Galatzer-Levy & Bonanno, 2014, treatment effects (Galatzer-Levy, Ankri, et al., 2013, and prediction (Galatzer-Levy, Karstoft, Statnikov, & Shalev, 2014 of individual differences in response to trauma. Method: Methodological and theoretical considerations for the application of Latent Growth Mixture Modeling (LGMM and allied methods such as Latent Class

  19. Taxonomic studies of Phlebotomus sergenti(parrot)(dip-tera:psychodidae)and its evolutionary relationship with its closest allies

    Juma Khan Kakarsulemankhel

    2008-01-01

    In the survey,the work was done to develop taxonomic record of sand fly Phlebotomus (paaphlebotomus)ser-genti (Parrot)collected for the first time from new epidemic localities of cutaneous leishmaniasis in Dera Ghazi Khan (Pakistan).In view of the published reports about the detection of Leishmania major,the causative a-gent of cutaneous leishmaniasis from this species in many countries,the correct identification of this species becomes of significant value in the study of epidemiology of leishmaniasis.Therefore,in order to facilitate zool-ogists and medical researchers in its correct identification,taxonomic characters of P.sergenti (parrot)is studied in details with special reference to its mouth parts,male and female genitalia.A key is also given to P. sergentii (parrot)and its closest allies.In this light its relationships with its closest allies is also briefly dis-cussed.

  20. Electronic Grey Literature in Accelerator Science and Its Allied Subjects : Selected Web Resources for Scientists and Engineers

    Rajendiran, P

    2006-01-01

    Grey literature Web resources in the field of accelerator science and its allied subjects are collected for the scientists and engineers of RRCAT (Raja Ramanna Centre for Advanced Technology). For definition purposes the different types of grey literature are described. The Web resources collected and compiled in this article (with an overview and link for each) specifically focus on technical reports, preprints or e-prints, which meet the main information needs of RRCAT users.

  1. Influence of Electric Field on Mechanical Properties of Al-Li Alloy Containing Cerium and Electronic Mechanism

    刘兵; 陈铮; 王永欣; 王西宁

    2001-01-01

    The effect of electric field on the mechanical properties and microstructure of Al-Li alloy containing Ce was investigated, and mechanism was discussed. The experimental results show that the ductility of the alloy is enhanced by the electric field. The fracture features are changed and the precipitates are dispersed under the effect of the electric field. The mechanism discussion reveals that the effects of the electric field on the alloy are due to the change of the electron density in the alloy.

  2. Five Years of Acute Stroke Unit Care: Comparing ASU and Non-ASU Admissions and Allied Health Involvement

    Isobel J. Hubbard

    2014-01-01

    Full Text Available Background. Evidence indicates that Stroke Units decrease mortality and morbidity. An Acute Stroke Unit (ASU provides specialised, hyperacute care and thrombolysis. John Hunter Hospital, Australia, admits 500 stroke patients each year and has a 4-bed ASU. Aims. This study investigated hospital admissions over a 5-year period of all strokes patients and of all patients admitted to the 4-bed ASU and the involvement of allied health professionals. Methods. The study retrospectively audited 5-year data from all stroke patients admitted to John Hunter Hospital (n=2525 and from nonstroke patients admitted to the ASU (n=826. The study’s primary outcomes were admission rates, length of stay (days, and allied health involvement. Results. Over 5 years, 47% of stroke patients were admitted to the ASU. More male stroke patients were admitted to the ASU (chi2=5.81; P=0.016. There was a trend over time towards parity between the number of stroke and nonstroke patients admitted to the ASU. When compared to those admitted elsewhere, ASU stroke patients had a longer length of stay (z=−8.233; P=0.0000 and were more likely to receive allied healthcare. Conclusion. This is the first study to report 5 years of ASU admissions. Acute Stroke Units may benefit from a review of the healthcare provided to all stroke patients. The trends over time with respect to the utilisation of the John Hunter Hospitall’s ASU have resulted in a review of the hospitall’s Stroke Unit and allied healthcare.

  3. The Balance Sheet of the Battle of Crete: How Allied Indecision, Bureaucracy, and Pretentiousness Lost the Battle

    2008-04-01

    Dictator Benito Mussolini viewed the Mediterranean "as his private Italian lake,’.23 an illusion Hitler willingly encouraged because the Kriegsmarine had...the Mediterranean 3 The Axis Position and Mussolini 4 STRATEGIC CONFUSION Defending Greece : 7 OPERATIONAL INDECISION 8 PREPARATIONS Retreat from...to solidify control of the Middle East and northern Africa. Neither Germany nor the Allies had designs for the eastern Mediterranean. Enter Benito

  4. The Invasion of Iran by the Allies during World War II

    Süleyman Erkan

    2010-12-01

    Full Text Available When the Nazi Germany attacked the Soviets at the beginning of World War II, the USA, the UK and the Soviet Union took part on the same side and were called the Allies. In order to convey the military aid to the Soviets through Iran, the USA and the UK invaded Iran with the Soviets and dethroned Ahmad Reza Shah, who felt sympathy for Germany. By signing a treaty in 1942, they pledged to evacuate their troops from Iran six months after the war ended. They published a declaration that they would protect Iran’s territorial integrity as well as they repeated these decisions during the conference they made in Tehran in 1943. However; despite these decisions, a hidden rivalry began between the USSR and the West in Iran. The rivalry became very clear towards the end of the war. The Soviets wouldn’t withdraw from Iran. Additionally, they endeavored to divide Iran. The Iran crisis of 1946 between the West and the Soviets formed the start of the Cold War according to some people. As a country, Iran was highly affected by this process.

  5. What constitutes an excellent allied health care professional? A multidisciplinary focus group study

    Paans, Wolter; Wijkamp, Inge; Wiltens, Egbert; Wolfensberger, Marca V

    2013-01-01

    Background Determining what constitutes an excellent allied health care professional (AHCP) is important, since this is what will guide the development of curricula for training future physical therapists, oral hygienists, speech therapists, diagnostic radiographers, and dietitians. This also determines the quality of care. Aim To describe perspectives of AHCPs on which characteristics are commonly associated with an excellent AHCP. Methods AHCPs’ perspectives were derived from three focus group discussions. Twenty-one health care professionals participated. The final analysis of the focus group discussions produced eight domains, in which content validity was obtained through a Delphi panel survey of 27 contributing experts. Results According to the survey, a combination of the following characteristics defines an excellent AHCP: (1) cognizance, to obtain and to apply knowledge in a broad multidisciplinary health care field; (2) cooperativity, to effectively work with others in a multidisciplinary context; (3) communicative, to communicate effectively at different levels in complex situations; (4) initiative, to initiate new ideas, to act proactively, and to follow them through; (5) innovative, to devise new ideas and to implement alternatives beyond current practices; (6) introspective, to self-examine and to reflect; (7) broad perspective, to capture the big picture; and (8) evidence-driven, to find and to use scientific evidence to guide one’s decisions. Conclusion The AHCPs perspectives can be used as a reference for personal improvement for supervisors and professionals in clinical practice and for educational purposes. These perspectives may serve as a guide against which talented students can evaluate themselves. PMID:24049449

  6. 18S rDNA phylogeny of lamproderma and allied genera (Stemonitales, Myxomycetes, Amoebozoa).

    Fiore-Donno, Anna Maria; Kamono, Akiko; Meyer, Marianne; Schnittler, Martin; Fukui, Manabu; Cavalier-Smith, Thomas

    2012-01-01

    The phylogenetic position of the slime-mould genus Lamproderma (Myxomycetes, Amoebozoa) challenges traditional taxonomy: although it displays the typical characters of the order Stemonitales, it appears to be sister to Physarales. This study provides a small subunit (18S or SSU) ribosomal RNA gene-based phylogeny of Lamproderma and its allies, with new sequences from 49 specimens in 12 genera. We found that the order Stemonitales and Lamproderma were both ancestral to Physarales and that Lamproderma constitutes several clades intermingled with species of Diacheopsis, Colloderma and Elaeomyxa. We suggest that these genera may have evolved from Lamproderma by multiple losses of fruiting body stalks and that many taxonomic revisions are needed. We found such high genetic diversity within three Lamproderma species that they probably consist of clusters of sibling species. We discuss the contrasts between genetic and morphological divergence and implications for the morphospecies concept, highlighting the phylogenetically most reliable morphological characters and pointing to others that have been overestimated. In addition, we showed that the first part (~600 bases) of the SSU rDNA gene is a valuable tool for phylogeny in Myxomycetes, since it displayed sufficient variability to distinguish closely related taxa and never failed to cluster together specimens considered of the same species.

  7. 18S rDNA phylogeny of lamproderma and allied genera (Stemonitales, Myxomycetes, Amoebozoa.

    Anna Maria Fiore-Donno

    Full Text Available The phylogenetic position of the slime-mould genus Lamproderma (Myxomycetes, Amoebozoa challenges traditional taxonomy: although it displays the typical characters of the order Stemonitales, it appears to be sister to Physarales. This study provides a small subunit (18S or SSU ribosomal RNA gene-based phylogeny of Lamproderma and its allies, with new sequences from 49 specimens in 12 genera. We found that the order Stemonitales and Lamproderma were both ancestral to Physarales and that Lamproderma constitutes several clades intermingled with species of Diacheopsis, Colloderma and Elaeomyxa. We suggest that these genera may have evolved from Lamproderma by multiple losses of fruiting body stalks and that many taxonomic revisions are needed. We found such high genetic diversity within three Lamproderma species that they probably consist of clusters of sibling species. We discuss the contrasts between genetic and morphological divergence and implications for the morphospecies concept, highlighting the phylogenetically most reliable morphological characters and pointing to others that have been overestimated. In addition, we showed that the first part (~600 bases of the SSU rDNA gene is a valuable tool for phylogeny in Myxomycetes, since it displayed sufficient variability to distinguish closely related taxa and never failed to cluster together specimens considered of the same species.

  8. A national survey of admissions criteria and processes in selected allied health professions.

    Scott, A H; Chase, L M; Lefkowitz, R; Morton-Rias, D; Chambers, C; Joe, J; Holmes, G; Bloomberg, S

    1995-01-01

    A national survey of admissions criteria and procedures was conducted for allied health programs in diagnostic medical imaging, health information management, nurse-midwifery, occupational therapy, physical therapy, and physician assistant education. From a sample of 462, 63.2% responded. The survey canvassed general program information, prerequisites, admissions procedures, and demographic trends. Respondents were primarily from public institutions with faculty actively involved in admissions. The most common prerequisites were anatomy/physiology, physics, biology, chemistry, and psychology; and the most frequently required admissions criteria were GPA, references, interviews, science GPA, and writing sample. Standardized tests were rarely utilized. The following were the major prerequisite characteristics and skills considered: academic skills, communication skills, problem-solving abilities, maturity/confidence, motivation, and work/study habits. Changing demographics were reported, including an increase in second-career, older, and ethnically diverse applicants. Also discussed were nontraditional and minority applicant admissions issues. Future research suggestions include use of noncognitive variables, and academic and clinical outcome studies. The utility of this information for validation/revision of admissions criteria are presented.

  9. Weight Management Advice for Clients with Overweight or Obesity: Allied Health Professional Survey

    Suzanne J. Snodgrass

    2016-11-01

    Full Text Available The prevalence of obesity is increasing. The potential for allied health professionals to intervene through the provision of lifestyle advice is unknown. This study aimed to determine the knowledge, attitudes and practices of health professionals in the provision of dietary and physical activity advice for clients with overweight or obesity. Dietitians, exercise physiologists, nurses, occupational therapists, physiotherapists and psychologists (n = 296 working in New South Wales were surveyed using paper-based and online methods. The majority of health professionals (71% believed that providing weight management advice was within their scope of practice; 81% provided physical activity advice but only 57% provided dietary advice. Other than dietitians, few had received training in client weight management during their professional qualification (14% or continuing education (16%. Providing dietary advice was associated with: believing it was within their scope of practice (OR 3.9, 95% CI 1.9–7.9, p < 0.01, training during their entry-level qualification (OR 7.2, 3.2–16.4, p < 0.01 and having departmental guidelines (OR 4.7, 2.1–10.9, p < 0.01. Most health professionals are willing to provide lifestyle advice to clients with overweight or obesity but few have received required training. Developing guidelines and training for in client weight management may potentially impact on rising obesity levels.

  10. Leadership in athletic training: implications for practice and education in allied health care.

    Kutz, Matthew R

    2010-01-01

    Leadership behaviors are an important aspect of athletic training and are needed within all allied health care disciples. A two-phase, exploratory, non-experimental research study using a Delphi technique and a randomly selected sample of athletic trainers (n = 161) was conducted to determine leadership competencies perceived to be important for athletic training practice and education. The Delphi technique (phase one) resulted in the Leadership Development in Athletic Training instrument (LDAT). In the national survey (phase two), respondents used the LDAT to rate the importance of leadership competencies for athletic training practice and for athletic training education. Coefficient alphas ranged from α = 0.83 to 0.97 and provided satisfactory estimates of internal consistency. Concurrent, construct, and convergent validity were established. Forty-nine leadership competencies were rated important for practice and 48 for education (M = 1.5, p ≤ 0.001). Exploratory factor analysis revealed that leadership competencies were organized by four constructs (with six emphases): 1) personality characteristics, 2) diagnosing context and people skills, 3) communication and initiative, and 4) strategic thinking. Repeated measures ANOVA with Sidak post-hoc adjustments indicated each leadership construct significantly increased in importance as the level of the ATEP progressed.

  11. Female Genital Mutilation in Kenya: are young men allies in social change programmes?

    Brown, Eleanor; Mwangi-Powell, Faith; Jerotich, Miriam; le May, Victoria

    2016-05-01

    The Girl Summit held in 2014 aimed to mobilise greater effort to end Female Genital Mutilation (FGM) within a generation, building on a global movement which viewed the practice as a severe form of violence against women and girls and a violation of their rights. The UN, among others, endorse "comprehensive" strategies to end FGM, including legalistic measures, social protection and social communications. FGM is a sensitive issue and difficult to research, and rapid ethnographic methods can use existing relations of trust within social networks to explore attitudes towards predominant social norms which posit FGM as a social necessity. This study used Participatory Ethnographic Evaluation Research (PEER) to understand young men's (18-25 years) perceptions of FGM, demand for FGM among future spouses, and perceptions of efforts to end FGM in a small town in West Pokot, Kenya, where FGM is reported to be high (between 85% to 96%). Twelve PEER researchers were recruited, who conducted two interviews with their friends, generating a total of 72 narrative interviews. The majority of young men who viewed themselves as having a "modern" outlook and with aspirations to marry "educated" women were more likely not to support FGM. Our findings show that young men viewed themselves as valuable allies in ending FGM, but that voicing their opposition to the practice was often difficult. More efforts are needed by multi-stakeholders - campaigners, government and local leaders - to create an enabling environment to voice that opposition.

  12. Achievements and challenges on policies for allied health professionals who use telehealth in the Canadian Arctic.

    Hailey, D; Foerster, V; Nakagawa, B; Wapshall, T M; Murtagh, J A; Smitten, J; Steblecki, J A; Wong, G

    2005-01-01

    We formulated policies and procedures for allied health professionals (AHPs) who provide services using telehealth in Nunavut, Canada's newest Arctic territory. These are a supplement to the clinical policies and procedures already established for Nunavut physicians and nurses. The services were in the areas of audiology, dietetics/nutrition, midwifery, occupational therapy, ophthalmic services, pharmacy, physiotherapy, psychology, respiratory therapy, social work and speech therapy. Documents specific to each of the services were developed, drawing on information from Government of Nunavut data, Nunavut healthcare providers and links made through the Internet. Topics included the scope and limitations of telehealth services, staff responsibilities, training and reporting, professional standards and cultural considerations. We also considered generic policies covering common issues such as jurisdiction, licensing and liability. The policies and procedures for AHPs will enhance and expand the successes already achieved with telehealth in Nunavut. The challenges are to balance the preferred approaches to service provision with the realities of health care and communications in an Arctic setting.

  13. Dengue therapeutics, chemoprophylaxis, and allied tools: state of the art and future directions.

    James Whitehorn

    2014-08-01

    Full Text Available Dengue is the most common arboviral disease of humans. There is an unmet need for a therapeutic intervention that reduces the duration and severity of dengue symptoms and diminishes the likelihood of severe complications. To this end, there are active discovery efforts in industry and academia to develop interventions, with a focus on small molecule inhibitors of dengue virus replication that are suitable for therapy or chemoprophylaxis. Advancements in animal models of dengue virus infection together with the possibility of a dengue human infection model have further enhanced the platform for dengue drug discovery. Whilst drug discovery efforts gestate, there are ongoing clinical research designed to benefit today's patients, including trials of supportive care interventions, and descriptive studies that should improve the ability of clinicians to make an accurate diagnosis early in the illness course and to identify patients most at risk of progression to severe disease. This review provides a state of the art summary of dengue drug discovery, clinical trials, and supportive allied research and reflects discussions at the 2nd International Dengue Therapeutics Workshop held in Ho Chi Minh City, Vietnam, in December 2013.

  14. Did the Allies Know in 1942 About Nazi Germany's Poor Prospects for an Atomic Bomb?

    Lustig, Harry

    2008-04-01

    According to official accounts, the U.S. knew nothing about Nazi Germany's efforts to get an atomic bomb until the end of the World War II, but had feared the worst. As it turned out, the Germans had made little progress. But did someone in the Allied camp know in 1942? In his 1986 book, The Griffin, Arnold Kramish relates how Paul Rosbaud, a spy for MI6, the British secret intelligence service, kept his handlers informed during the War about the German atomic project and reported the decision to give up on a bomb. Kramish's revelations are, understandably, thinly documented and Rosbaud's name can hardly be found independenly anywhere else. But as Samuel Goudsmit's papers in the Bohr Library show, he knew and communicated with Rosbaud from August 1945 on. In 1986, 15 letters exchanged by Goudsmit and Rosbaud were removed by the Government from the Library and eventually placed in the National Archives under classification review. Renewed interest in the Rosbaud story was engendered last year when his family sued MI6 in an English court for the release of the Rosbaud file. So far the spy agency has refused to reveal even that there is such a file. Discovering authoritatively what Rosbaud told the British and what they did with the information is clearly of historical interest.

  15. Piezoelectric motor development at AlliedSignal Inc., Kansas City Division

    Pressly, R.B.; Mentesana, C.P.

    1994-11-01

    The Kansas City Division of AlliedSignal Inc. has been investigating the fabrication and use of piezoelectric motors in mechanisms for United States Department of Energy (DOE) weapons applications for about four years. These motors exhibit advantages over solenoids and other electromagnetic actuators. Prototype processes have been developed for complete fabrication of motors from stock materials, including abrasive machining of piezoelectric ceramics and more traditional machining of other motor components, electrode plating and sputtering, electric poling, cleaning, bonding and assembly. Drive circuits have been fabricated and motor controls are being developed. Laboratory facilities have been established for electrical/mechanical testing and evaluation of piezo materials and completed motors. Recent project efforts have focused on the potential of piezoelectric devices for commercial and industrial use. A broad range of various motor types and application areas has been identified, primarily in Japan. The Japanese have been developing piezo motors for many years and have more recently begun commercialization. Piezoelectric motor and actuator technology is emerging in the United States and quickly gaining in commercial interest. The Kansas City Division is continuing development of piezoelectric motors and actuators for defense applications while supporting and participating in the commercialization of piezoelectric devices with private industry through various technology transfer and cooperative development initiatives.

  16. Exfoliation corrosion susceptibility of 8090 Al-Li alloy examined by electrochemical impedance spectroscopy

    蔡超; 李劲风; 郑子樵; 张昭

    2004-01-01

    The exfoliation corrosion susceptibility and electrochemical impedance spectroscopy(EIS) of rolled and peak-aged 8090 Al-Li alloys in EXCO solution were studied, and the EIS after exfoliation was simulated. Once exfoliation occurs, two capacitive arcs appear in the EIS at high-mediate frequency and mediate-low frequency respective ly. The exfoliation-attacked alloy surface consists of two parts, an original flat alloy surface and a new inter-face exposed to EXCO solution due to the exfoliation. The capacitance corresponding to the new exfoliation inter-face in creases approximately linearly with time at early exfoliation stage, due to the enlargement of the new inter-face. Then it maintains stable, due to the corrosion product covering on the new inter-face. The exfoliation susceptibility can be judged through the average slope of the capacitance vs time curve of the early exfoliation stage. This average slope of the rolled 8090 alloy is much higher than that of the peak-aged 8090 alloy, accordingly the rolled 8090 alloy is more susceptible to exfoliation than the peak-aged 8090 alloy.

  17. The Complicate Observations and Multi-Parameter Land Information Constructions on Allied Telemetry Experiment (COMPLICATE.

    Xin Tian

    Full Text Available The Complicate Observations and Multi-Parameter Land Information Constructions on Allied Telemetry Experiment (COMPLICATE comprises a network of remote sensing experiments designed to enhance the dynamic analysis and modeling of remotely sensed information for complex land surfaces. Two types of experimental campaigns were established under the framework of COMPLICATE. The first was designed for continuous and elaborate experiments. The experimental strategy helps enhance our understanding of the radiative and scattering mechanisms of soil and vegetation and modeling of remotely sensed information for complex land surfaces. To validate the methodologies and models for dynamic analyses of remote sensing for complex land surfaces, the second campaign consisted of simultaneous satellite-borne, airborne, and ground-based experiments. During field campaigns, several continuous and intensive observations were obtained. Measurements were undertaken to answer key scientific issues, as follows: 1 Determine the characteristics of spatial heterogeneity and the radiative and scattering mechanisms of remote sensing on complex land surfaces. 2 Determine the mechanisms of spatial and temporal scale extensions for remote sensing on complex land surfaces. 3 Determine synergist inversion mechanisms for soil and vegetation parameters using multi-mode remote sensing on complex land surfaces. Here, we introduce the background, the objectives, the experimental designs, the observations and measurements, and the overall advances of COMPLICATE. As a result of the implementation of COMLICATE and for the next several years, we expect to contribute to quantitative remote sensing science and Earth observation techniques.

  18. The Complicate Observations and Multi-Parameter Land Information Constructions on Allied Telemetry Experiment (COMPLICATE)

    Tian, Xin; Li, Zengyuan; Chen, Erxue; Liu, Qinhuo; Yan, Guangjian; Wang, Jindi; Niu, Zheng; Zhao, Shaojie; Li, Xin; Pang, Yong; Su, Zhongbo; van der Tol, Christiaan; Liu, Qingwang; Wu, Chaoyang; Xiao, Qing; Yang, Le; Mu, Xihan; Bo, Yanchen; Qu, Yonghua; Zhou, Hongmin; Gao, Shuai; Chai, Linna; Huang, Huaguo; Fan, Wenjie; Li, Shihua; Bai, Junhua; Jiang, Lingmei; Zhou, Ji

    2015-01-01

    The Complicate Observations and Multi-Parameter Land Information Constructions on Allied Telemetry Experiment (COMPLICATE) comprises a network of remote sensing experiments designed to enhance the dynamic analysis and modeling of remotely sensed information for complex land surfaces. Two types of experimental campaigns were established under the framework of COMPLICATE. The first was designed for continuous and elaborate experiments. The experimental strategy helps enhance our understanding of the radiative and scattering mechanisms of soil and vegetation and modeling of remotely sensed information for complex land surfaces. To validate the methodologies and models for dynamic analyses of remote sensing for complex land surfaces, the second campaign consisted of simultaneous satellite-borne, airborne, and ground-based experiments. During field campaigns, several continuous and intensive observations were obtained. Measurements were undertaken to answer key scientific issues, as follows: 1) Determine the characteristics of spatial heterogeneity and the radiative and scattering mechanisms of remote sensing on complex land surfaces. 2) Determine the mechanisms of spatial and temporal scale extensions for remote sensing on complex land surfaces. 3) Determine synergist inversion mechanisms for soil and vegetation parameters using multi-mode remote sensing on complex land surfaces. Here, we introduce the background, the objectives, the experimental designs, the observations and measurements, and the overall advances of COMPLICATE. As a result of the implementation of COMLICATE and for the next several years, we expect to contribute to quantitative remote sensing science and Earth observation techniques. PMID:26332035

  19. Structure-Property Correlations in Al-Li Alloy Integrally Stiffened Extrusions

    Hales, Stephen J.; Hafley, Robert A.

    2001-01-01

    The objective of this investigation was to establish the relationship between mechanical property anisotropy, microstructure and crystallographic texture in integrally 'T'-stiffened extruded panels fabricated from the Al-Li alloys 2195, 2098 and 2096. In-plane properties were measured as a function of orientation at two locations in the panels, namely mid-way between (Skin), and directly beneath (Base), the integral 'T' stiffeners. The 2195 extrusion exhibited the best combination of strength and toughness, but was the most anisotropic. The 2098 extrusion exhibited lower strength and comparable toughness, but was more isotropic than 2195. The 2096 extrusion exhibited the lowest strength and poor toughness, but was the most isotropic. All three alloys exhibited highly elongated grain structures and similar location-dependent variations in grain morphology. The textural characteristics comprised a beta + fiber texture, similar to rolled product, in the Skin regions and alpha + fiber texture, comparable to axisymmetric extruded product, in the Base regions. In an attempt to quantitatively correlate texture with yield strength anisotropy, the original 'full constraint' Taylor model and a variant of the 'relaxed constraint' model, explored by Wert et al., were applied to the data. A comparison of the results revealed that the Wert model was consistently more accurate than the Taylor model.

  20. Hot Deformation Behavior and Processing Maps of 2099 Al-Li Alloy

    Chen, Bin; Tian, Xiao-lin; Li, Xiao-ling; Lu, Chen

    2014-06-01

    Hot deformation behavior and processing maps of the 2099 Al-Li alloy are investigated by tensile test at the temperature range from 250 to 450 °C and the strain rate range from 0.001 to 5.0 s-1. The typical true stress-true strain curves show that the flow stress increases with increasing the strain rate and decreasing the deforming temperature. All curves exhibit rapid work hardening at an initial stage of strain followed by remarkable dynamic softening. Based on the flow stress behavior, the processing maps are calculated and analyzed according to the dynamic materials model (DMM). The processing maps exhibit an instability domain in the temperature and strain rate ranges: T = 250-260 °C and = 0.1-0.5 s-1. The maps also exhibit an optimum hot working condition in the stability domain that occurs in the temperature of 400 °C for a strain rate of 0.001 s-1 and having a maximum efficiency of 60%. The microstructural examinations exhibit the occurrence of dynamic recovery (DRV) during hot deformation of the 2099 alloy which is the dominant softening mechanism in the alloy. The fracture behavior changes from a brittle fracture to a ductile fracture as strain rate decreases and temperature increases.

  1. Stress Concentration and Fracture at Inter-variant Boundaries in an Al-Li Alloy

    Crooks, Roy; Tayon, Wes; Domack, Marcia; Wagner, John; Beaudoin, Armand

    2009-01-01

    Delamination fracture has limited the use of lightweight Al-Li alloys. Studies of secondary, delamination cracks in alloy 2090, L-T fracture toughness samples showed grain boundary failure between variants of the brass texture component. Although the adjacent texture variants, designated B(sub s1) and B(sub s2), behave similarly during rolling, their plastic responses to mechanical tests can be quite different. EBSD data from through-thickness scans were used to generate Taylor factor maps. When a combined boundary normal and shear tensor was used in the calculation, the delaminating grains showed the greatest Taylor Factor differences of any grain pairs. Kernel Average Misorientation (KAM) maps also showed damage accumulation on one side of the interface. Both of these are consistent with poor slip accommodation from a crystallographically softer grain to a harder one. Transmission electron microscopy was used to confirm the EBSD observations and to show the role of slip bands in the development of large, interfacial stress concentrations. A viewgraph presentation accompanies the provided abstract.

  2. Science as an ally of religion: a Muslim appropriation of 'the conflict thesis'.

    Yalcinkaya, M Alper

    2011-06-01

    John W. Draper's History of the Conflict between Religion and Science (1874) is commonly regarded as the manifesto of the 'conflict thesis'. The superficiality of this thesis has been demonstrated in recent studies, but to read Draper's work only as a text on 'science versus religion' is to miss half of its significance, as it also involved evaluations of individual religions with respect to their attitudes towards science. Due to Draper's favourable remarks on Islam, the Ottoman author Ahmed Midhat translated his work into Turkish, and published it along with his own comments on Draper's arguments. Midhat interpreted Islam using the cues provided by Draper, and portrayed it as the only religion compatible with science. While his Christian readers condemned Draper for his approach to Islam, Midhat transformed the 'conflict thesis' into a proclamation that Islam and science were allies in opposition to Christian encroachment on the Ottoman Empire. This paper analyses Midhat's appropriation of Draper's work and compares it to the reaction of Draper's Christian readers. It discusses the context that made an alliance between Islam and science so desirable for Midhat, and emphasizes the impact of the historico-geographical context on the encounters between and representations of science and religion.

  3. COMPARATIVE STUDY OF POLLEN AND PISTIL IN CROCUS SATIVUS L. (IRIDACEAE AND ALLIED SPECIES

    M. GRILLI CAIOLA

    2000-04-01

    Full Text Available Crocus sativus L. is mainly known for the production of the drug saffron. Because of its sterility, it is propagated vegetatively by means of corms. To gain information on the reproductive biology of saffron and allied species, a comparative study on pollen and pistil of Crocus sativus L., C. cartwrightianus Herb., C. thomasii Ten. and C. hadriaticus Herb. was carried out. Pollen and pistils gathered at anthesis were examined by light (LM and scanning electron microscopy (SEM. Pollen shape and size, anomalous pollen grain percentage, pollen viability, pollen germination in vitro and on self-, and cross-pollinated stigmas were examined. Pistils at different developmental stages were examined by light microscopy. C. hadriaticus had the smallest pollen; C. sativus showed a higher percentage of anomalous and aborted grains and a lower percentage of viable grains. Pollen germination in vitro as well as on differently pollinated stigmas was lowest in C. sativus. Pistil organization was similar in all the species, but ovule number and integuments varied. Embryo sacs mature early, and female gametophyte development is regular for some days after flower anthesis. Capsules with seeds were obtained from all diploid species as well as in saffron after free- and cross-pollination. Results confirm that sterility in C. sativus is mainly confined to pollen.

  4. COMPARATIVE STUDY OF POLLEN AND PISTIL IN CROCUS SATIVUS L. (IRIDACEAE AND ALLIED SPECIES

    P. LAURETTI

    2000-01-01

    Full Text Available Crocus sativus L. is mainly known for the production of the drug saffron. Because of its sterility, it is propagated vegetatively by means of corms. To gain information on the reproductive biology of saffron and allied species, a comparative study on pollen and pistil of Crocus sativus L., C. cartwrightianus Herb., C. thomasii Ten. and C. hadriaticus Herb. was carried out. Pollen and pistils gathered at anthesis were examined by light (LM and scanning electron microscopy (SEM. Pollen shape and size, anomalous pollen grain percentage, pollen viability, pollen germination in vitro and on self-, and cross-pollinated stigmas were examined. Pistils at different developmental stages were examined by light microscopy. C. hadriaticus had the smallest pollen; C. sativus showed a higher percentage of anomalous and aborted grains and a lower percentage of viable grains. Pollen germination in vitro as well as on differently pollinated stigmas was lowest in C. sativus. Pistil organization was similar in all the species, but ovule number and integuments varied. Embryo sacs mature early, and female gametophyte development is regular for some days after flower anthesis. Capsules with seeds were obtained from all diploid species as well as in saffron after free- and cross-pollination. Results confirm that sterility in C. sativus is mainly confined to pollen.

  5. Evolution of grain structure in AA2195 Al-Li alloy plate during recrystallization

    DU Yu-xuan; ZHANG Xin-ming; YE Ling-ying; LIU Sheng-dan

    2006-01-01

    The evolution of the grain structures in AA2195 Al-Li alloy plate warm-rolled by 80% reduction during recrystallization annealing at 500 ℃ was investigated by electron backscatter diffraction, scanning electron microscopy and transmission electron microscopy. It is found that the elongated grain structures are caused by the lamellar distribution of recrystallization nucleation sites,being lack of large second phase particles (> 1 μm), and dispersive coherent particles (such as δ'andβ) concentrated in planar bands.The recrystallization process may be separated into three stages: firstly, recrystallization nucleation occurs heterogeneously, and the nuclei are concentrated in some planar zones parallel to rolling plane. Secondly, the grain boundaries interacted with small particles concentrate in planar bands, which is able to result in the elongated grain structures. The rate of the grain growth is controlled by the dissolution of these small particles. Thirdly, after most of small particles are dissolved, their hindrance to migration of the grain boundaries fades away, and the unrecrystallized zones are consumed by adjacent recrystallized grains. The migration of high angle grain boundaries along normal direction leads a gradual transformation from the elongated grains to the nearly equiaxed, which is driven by the tension of the grain boundaries.

  6. Successfully living with chronic arthritis. The role of the allied health professionals.

    Taal, Erik; Bobietinska, Elzbieta; Lloyd, Jill; Veehof, Martine; Rasker, Wietske Jm; Oosterveld, F G J Frits; Rasker, J J Hans

    2006-03-01

    The treatment and care of patients with rheumatoid arthritis (RA) is complex and various health professionals with different areas of expertise may be involved. The objective of this article is to review the treatments and their efficacy as provided by health care professionals in RA care. The requirements for further research in this area are formulated. To achieve better effects of treatment it is necessary to improve the coordination of services as provided by the different specialists. The important roles of the patients themselves in the care and management of the disease are emphasized, as well as the roles of the informal caregivers such as a spouse or other family members and friends and the role of patient societies. The possible role of the International Classification of Functioning, Disability and Health (ICF) to improve the communication and facilitate the coordination among health professionals and between patients and health professionals is mentioned. The topics presented in this article may encourage further discussion and research, particularly concerning the effects of the treatments as provided by allied health professionals. Health professionals play an important role in the life of patients with rheumatic disorders, in all the domains of the ICF: body functions and structure, activities (action by an individual) and participation (involvement in a life situation). Health professionals in rheumatology can make the difference in the lives of RA patients and their families.

  7. Process Optimization of Dual-Laser Beam Welding of Advanced Al-Li Alloys Through Hot Cracking Susceptibility Modeling

    Tian, Yingtao; Robson, Joseph D.; Riekehr, Stefan; Kashaev, Nikolai; Wang, Li; Lowe, Tristan; Karanika, Alexandra

    2016-07-01

    Laser welding of advanced Al-Li alloys has been developed to meet the increasing demand for light-weight and high-strength aerospace structures. However, welding of high-strength Al-Li alloys can be problematic due to the tendency for hot cracking. Finding suitable welding parameters and filler material for this combination currently requires extensive and costly trial and error experimentation. The present work describes a novel coupled model to predict hot crack susceptibility (HCS) in Al-Li welds. Such a model can be used to shortcut the weld development process. The coupled model combines finite element process simulation with a two-level HCS model. The finite element process model predicts thermal field data for the subsequent HCS hot cracking prediction. The model can be used to predict the influences of filler wire composition and welding parameters on HCS. The modeling results have been validated by comparing predictions with results from fully instrumented laser welds performed under a range of process parameters and analyzed using high-resolution X-ray tomography to identify weld defects. It is shown that the model is capable of accurately predicting the thermal field around the weld and the trend of HCS as a function of process parameters.

  8. Micro-, meso- and macro-texture and fatigue crack roughness in Al-Li 2090 T8E41

    Haase, J.D.; Guvenilir, A.; Witt, J.R.; Stock, S.R. [Georgia Inst. of Tech., Atlanta, GA (United States)

    1998-12-31

    The use of synchrotron polychromatic x-ray microbeams in the transmission geometry is described for mapping grain orientation as a function of position and for relating this microtexture to the formation of large asperities on fatigue crack surfaces in Al-Li 2090 T8E41. In common with the centers of rolled plates of many aluminum alloys, Al-Li 2090 T8E41 has a sharp average texture or macrotexture different from that in the outer portions of the plate. The geometry of large asperities in Al-Li 2090 has been related to this macrotexture, and the resulting roughness-induced crack closure is recognized to be responsible for the very low crack propagation rates in certain plate orientations. This report focuses on why asperities form at certain positions and why the crack remains relatively planar elsewhere. The microtexture (i.e., the grain-to-grain orientation variation) seems to be organized into a specific type of mesotexture: multiple adjacent grains have nearly identical orientations and form substantial volumes of near-single-crystal material. Transitions between differently oriented near-single-crystal volumes or between a near-single-crystal region and more randomly oriented grains appear to bound asperities.

  9. Public/private sector cooperation to promote industrial energy efficiency: Allied partners and the US Department of Energy

    McKane, Aimee; Cockrill, Chris; Tutterow, Vestal; Radspieler, Anthony

    2003-05-18

    Since 1996, the US Department of Energy's Office of Industrial Technologies (USDOE) has been involved in a unique voluntary collaboration with industry called the Allied Partner program. Initially developed under the Motor Challenge program, the partnership concept continues as a central element of USDOE's BestPractices, which in 2001 integrated all of USDOE's near-term industrial program offerings including those in motors, compressed air, pump, fan, process heating and steam systems. Partnerships are sought with end use industrial companies as well as equipment suppliers and manufacturers, utilities, consultants, and state agencies that have extensive existing relationships with industrial customers. Partners are neither paid nor charged a fee for participation. Since the inception of Allied Partners, the assumption has been that these relationships could serve as the foundation for conveying a system energy-efficiency message to many more industrial facilities than could be reached through a typical government-to-end-user program model. An independent evaluation of the Motor Challenge program, reported at the last EEMODS conference, attributed US $16.9 million or nearly 67 percent of the total annual program energy savings to the efforts of Allied Partners in the first three years of operation. A recent evaluation of the Compressed Air Challenger, which grew out of the former Motor Challenger program, attribute additional energy savings from compressed air training alone at US $12.1 million per year. Since the reorganization under BestPractices, the Allied Partner program has been reshaped to extend the impact of all BestPractices program activities. This new model is more ambitious than the former Motor Challenge program concerning the level of collaborative activities negotiated with Allied Partners. This paper describes in detail two new types of program initiatives involving Allied Partners: Qualified Specialist Training and Energy Events. The

  10. Design, synthesis and biological evaluation of chalconyl blended triazole allied organosilatranes as giardicidal and trichomonacidal agents.

    Singh, Gurjaspreet; Arora, Aanchal; Mangat, Satinderpal Singh; Rani, Sunita; Kaur, Hargobinder; Goyal, Kapil; Sehgal, Rakesh; Maurya, Indresh Kumar; Tewari, Rupinder; Choquesillo-Lazarte, Duane; Sahoo, Subash; Kaur, Navneet

    2016-01-27

    A series of chalconyl blended triazole allied silatranes (7a-g/8a-g/9a-g) were synthesized in good yields using a simple, economical and biocompatible synthetic route. The blend of three different pharmacologically active moieties into a single scaffold resulted into synergistic effect in their bio-activity. Various substitutions were tried to study the structure activity relationship (SAR) of the synthesized compounds on the basis of biological results. All the newly synthesized compounds were well characterized by IR, (1)H and (13)C NMR, low resolution mass spectroscopy and elemental analysis. The structures of 7a and 7c were authenticated by single crystal X-ray crystallography. These compounds were screened by using Molinspiration software for their physicochemical properties and all the compounds showed good oral bioavailability. The antiparasitic activity of the newly synthesized compounds was evaluated against unicellular parasites (Giardia lamblia and Trichomonas vaginalis) in comparison to standard drug (metronidazole) by 3-(4,5-dimethylthiazol-yl)-diphenyl tetrazolium bromide (MTT) assay. All the compounds displayed significant activity against G. lamblia and T. vaginalis with IC50 values ranging from 19.58-131.2 μM to 18.24-101.26 μM respectively. The entire library of compounds was found to be more active than metronidazole except 9a, 9f and 9g. Notably, 9e and 7e were found to be most significant against G. lamblia and T. vaginalis respectively.

  11. What constitutes an excellent allied health care professional? A multidisciplinary focus group study

    Paans W

    2013-09-01

    Full Text Available Wolter Paans, Inge Wijkamp, Egbert Wiltens, Marca V Wolfensberger Research and Innovation Group Talent Development in Higher Education and Society, Hanze University of Applied Sciences, Groningen, The Netherlands. Background: Determining what constitutes an excellent allied health care professional (AHCP is important, since this is what will guide the development of curricula for training future physical therapists, oral hygienists, speech therapists, diagnostic radiographers, and dietitians. This also determines the quality of care. Aim: To describe perspectives of AHCPs on which characteristics are commonly associated with an excellent AHCP. Methods: AHCPs' perspectives were derived from three focus group discussions. Twenty-one health care professionals participated. The final analysis of the focus group discussions produced eight domains, in which content validity was obtained through a Delphi panel survey of 27 contributing experts. Results: According to the survey, a combination of the following characteristics defines an excellent AHCP: (1 cognizance, to obtain and to apply knowledge in a broad multidisciplinary health care field; (2 cooperativity, to effectively work with others in a multidisciplinary context; (3 communicative, to communicate effectively at different levels in complex situations; (4 initiative, to initiate new ideas, to act proactively, and to follow them through; (5 innovative, to devise new ideas and to implement alternatives beyond current practices; (6 introspective, to self-examine and to reflect; (7 broad perspective, to capture the big picture; and (8 evidence-driven, to find and to use scientific evidence to guide one's decisions. Conclusion: The AHCPs perspectives can be used as a reference for personal improvement for supervisors and professionals in clinical practice and for educational purposes. These perspectives may serve as a guide against which talented students can evaluate themselves. Keywords: clinical

  12. Strength distribution of fatigue crack initiation sites in an Al-Li alloy

    Zhai, T.

    2006-10-01

    The stress-number of cycles to failure (S-N) curves were measured along the short-transverse (S) and rolling (L) directions of a hot-cross-rolled AA 8090 Al-Li alloy plate (45-mm thick). The alloy was solution heat treated, quenched in water, strained by 6 pct, and peak aged. Fatigue tests were carried out in four-point bend at room temperature, 20 Hz, R=0.1, in air. It was found that the fatigue limits in the S and L directions were 147 and 197 MPa, respectively. The crack population on the surface of a sample at failure increased with the applied stress level and was found to be a Weibull function of the applied maximum stress in this alloy. The strength distribution of fatigue weakest links, where cracks were initiated, was derived from the Weibull function determined by the experimental data. The fatigue weakest-link density was defined as the crack population per unit area at a stress level close to the ultimate tensile stress and can be regarded as a materials property. The density and strength distribution of fatigue weakest links were found to be markedly different between the L and S directions, accounting for the difference in fatigue limit between the directions in this alloy. They were also found to be different between S-L and S-T samples, and between L-T and L-S samples of this alloy, which could not be revealed by the corresponding S-N curves measured. These differences were due to the anisotropy of the microstructures in different directions in this alloy.

  13. Evolution of the internal friction in SIC particle reinforced 8090 Al-Li metal matrix composite; Evolucion de la friccion interna del material compuesto de matriz Al-Li 8090 reforzado con particulas de SiC

    Gutierrez-Urrutia, I.; Gallego, I.; No, M. L.; San Juan, J. M.

    2001-07-01

    The present study has been undertaken to investigate the mechanisms of thermal stress relief at the range of temperatures below room temperature for the metal matrix composite Al-Li 8090/SiC. For this aim the experimental technique of internal friction has been used which has been showed up very effective. Several thermal cycles from 453 K to 100 K were used in order to measures the internal friction as well as the elastic modules of the material concluding that thermal stresses are relaxed by microplastic deformation around the reinforcements. It has been also related the variation in the elastic modules with the different levels of precipitation. (Author) 18 refs.

  14. A systematic review of professional supervision experiences and effects for allied health practitioners working in non-metropolitan health care settings

    Ducat WH

    2015-08-01

    Full Text Available Wendy H Ducat,1,3 Saravana Kumar2 1Cunningham Centre, Darling Downs Hospital and Health Service, Australia; 2School of Health Sciences, International Centre for Allied Health Evidence, Sansom Institute, University of South Australia, Adelaide, SA, Australia; 3Rural Clinical School, School of Medicine, University of Queensland, Brisbane, QLD, Australia Introduction: In regional, rural, and remote settings, allied health professional supervision is one organizational mechanism designed to support and retain the workforce, provide clinical governance, and enhance service delivery. A systematic approach to evaluating the evidence of the experience and effects of professional supervision for non-metropolitan allied health practitioners and their service delivery is needed. Methods: Studies investigating the experience and effects of professional supervision across 17 allied health disciplines in non-metropolitan health services were systematically searched for using standardized keywords across seven databases. The initial search identified 1,574 references. Of these studies, five met inclusion criteria and were subject to full methodological appraisal by both reviewers. Two studies were primarily qualitative with three studies primarily quantitative in their approach. Studies were appraised using McMaster critical appraisal tools and data were extracted and synthesized. Results: Studies reported the context specific benefits and challenges of supervision in non-metropolitan areas and the importance of supervision in enhancing satisfaction and support in these areas. Comparison of findings between metropolitan and non-metropolitan settings within one study suggested that allied health in non-metropolitan settings were more satisfied with supervision though less likely to access it and preferred supervision with other non-metropolitan practitioners over access to more experienced supervisors. One study in a regional health service identified the lack

  15. Allies of a Kind: Canadian Army-US Army Relations and the Korean War, 1950-1953

    2015-01-01

    be hard on the Koreans, whom they blamed for the war . Caught in a gang rape , four Patricias killed three and wounded four men of the victim’s family...Korean War , 1950-1953 Allan R. Millett COVER IMAGE. Brigadier J.M. Rockingham meets with US Gen- eral Matthew Ridgway. (Courtesy of Canadian Department of...National Defence.) ALLIES OF A KIND Canadian Army-US Army Relations and the Korean War , 1950-1953 Allan R. Millett Combat Studies Institute Press US

  16. A study of student perceptions of learning transfer from a human anatomy and physiology course in an allied health program

    Harrell, Leigh S.

    The purpose of this study was two-fold. First the study was designed to determine student perceptions regarding the perceived degree of original learning from a human anatomy and physiology course, and the student perception of the use of the knowledge in an allied health program. Second, the intention of the study was to establish student beliefs on the characteristics of the transfer of learning including those factors which enhance learning transfer and those that serve as barriers to learning transfer. The study participants were those students enrolled in any allied health program at a community college in a Midwest state, including: nursing, radiology, surgical technology, health information technology, and paramedic. Both quantitative and qualitative data were collected and analyzed from the responses to the survey. A sub-group of participants were chosen to participate in semi-structured formal interviews. From the interviews, additional qualitative data were gathered. The data collected through the study demonstrated student perception of successful transfer experiences. The students in the study were able to provide specific examples of learning transfer experienced from the human anatomy and physiology course in their allied health program. Findings also suggested students who earned higher grades in the human anatomy and physiology course perceived greater understanding and greater use of the course's learning objectives in their allied health program. The study found the students believed the following learning activities enhances the transfer of learning: (1) Providing application of the information or skills being learned during the instruction of the course content enhances the transfer of learning. (2) Providing resource materials and activities which allow the students to practice the content being taught facilitates the transfer of learning. The students made the following recommendations to remove barriers to the transfer of learning: (1

  17. allied Bio330 full course [ all discussions homework  all check understanding and mod 6 progress test

    Laynebaril1

    2017-01-01

     allied Bio330 full course [ all discussions homework  all check understanding and mod 6 progress test Click Link Below To Buy: http://hwcampus.com/shop/bio330-full-course/   mod 1 Hello! Please respond to the following questions (minimum of 150 words). What biome do you live in? Describe its climate including seasonal temperatures and precipitation. List 3 ways that humans have impacted the local environment. List 2 common animals and 2 common plants. List one adaptat...

  18. Influence of the Local Chemical Composition on the Mechanical Properties of Laser Beam Welded Al-Li Alloys

    Enz, Josephin; Riekehr, Stefan; Ventzke, Volker; Kashaev, Nikolai

    The increasing interest of the aircraft industry in reduction of structural weight of aircrafts has resulted in the development of lightweight and high-strength Al-Li alloys as well as in the introduction of laser beam welding to the manufacturing process. The objective of this study is the investigation of the influence of variations in the chemical composition on local mechanical properties, like micro-hardness and micro-tensile strength, of CO 2 laser beam welded skin-stringer joints made from AA2196 and AA2198. Additionally the influence of the welding process on weld chemistry is studied in view of the improvement of the weld quality.

  19. A protocol for literature triage in online learning for the net-generation nursing and allied health care students

    Maryam Ateya

    2015-04-01

    Full Text Available Nursing and allied health care students use online learning resources with their own perspective of learning, often combined with curiosity. Although, students are overwhelmed with access to an enormous pool of information, we hypothesized that students may not possess the skills to appraise the merits of all online resources. Our pilot survey results have shown that students’ knowledge of literature appraisal is inadequate. Circumventing this barrier requires adopting a three-phase protocol for literature triage such as: selection, appraisal, and critical reading. These skills would facilitate assessing all aspects of the literature, and identifying the best learning material.

  20. When Care and Concern Are Not Enough: School Personnel’s Development as Allies for Trans and Gender Non-Conforming Students

    Robert A. Marx

    2017-01-01

    Full Text Available Trans people—and particularly trans youth—have come to the forefront of political and educational discussions, especially as legislation has aimed to ensure that school personnel act as enforcers of state-level policies targeting trans youth. For this reason, and because research demonstrates that youth in schools form attachments to and receive support from school personnel, our research looks at school personnel’s development as allies. By analyzing focus group data following a training workshop, we explore how participants understand their roles as allies to trans and gender non-conforming youth. We found that trans issues were salient and participants expressed new knowledge about and openness towards transgender youth, as well as care and concern for their wellbeing. Nonetheless, many participants retained frames of understanding that relied on trans people as Other and that situated their roles as allies through the frameworks of protection and care. We argue that these understandings of trans youth and the role of allies reinforces cisnormativity, and we push for a more nuanced understanding of allyship that moves beyond knowledge, beliefs, attitudes and intended behaviors as markers of allyship to ensure that allies do not reproduce cisnormativity even in their support of trans and gender non-conforming youth.

  1. Corrosion behavior of 2195 and 1420 Al-Li alloys in neutral 3.5% NaCl solution under tensile stress

    LI Jin-feng; CHEN Wen-jing; ZHAO Xu-shan; REN Wen-da; ZHENG Zi-qiao

    2006-01-01

    The corrosion behaviors of 1420 and 2195 Al-Li alloys under 308 and 490 MPa tensile stress respectively in neutral 3.5% NaCl solution were investigated using electrochemical impedance spectroscopy(EIS) and scanning electron microscope(SEM). It is found that the unstressed 1420 alloy is featured with large and discrete pits, while general corrosion and localized corrosion including intergranular corrosion and pitting corrosion occur on the unstressed 2195 alloy. As stress is applied to 1420 alloy, the pit becomes denser and its size is decreased. While, for the stressed 2195 alloy, intergranular corrosion is greatly aggravated and severe general corrosion is developed from connected pits. The EIS analysis shows that more severe general corrosion and localized corrosion occur on the stressed 2195 Al-Li alloy than on 1420 Al-Li alloy. It is suggested that tensile stress has greater effect on the corrosion of 2195 Al-Li alloy than on 1420 Al-Li alloy.

  2. Measuring the quality of allied health services in Australia: is it a case of “the more we learn, the less we know?”

    Milanese S

    2012-07-01

    Full Text Available Karen Grimmer-Somers, Steve Milanese, Saravana KumarInternational Centre for Allied Health Evidence (iCAHE, University of South Australia, North Terrace, Adelaide, AustraliaBackground: Sensitive and reliable measurement of allied health (AH service quality is in its infancy. This is largely related to the complexity of the AH discipline-mix, the services these disciplines provide, and the locations in which services are provided. AH is variably described, with up to 49 disciplines being listed in the literature. These disciplines often undertake a range of interlinked activities such as assessment and diagnosis, counseling, therapy and rehabilitation, manufacture, education, and service organization. AH disciplines work in a range of roles in a range of public and private sector organizations, and often consult with their patients/clients a number of times for the management of one condition. They operate under a variety of funding models, and often within service delivery constraints. This evidence-informed analytical review outlines factors which should be considered by allied health leaders, reflecting clinicians, policy-makers, managers, and academics, in regards to making an informed choice of sensitive and reliable measures of AH service quality. Strong, visionary, and collaborative leadership is required to ensure that allied health activities and outcomes are measured and reported effectively and efficiently.Keywords: allied health (AH, sensitive, reliable measures, health service quality

  3. Implementation of a patient safety incident management system as viewed by doctors, nurses and allied health professionals.

    Travaglia, Joanne F; Westbrook, Mary T; Braithwaite, Jeffrey

    2009-05-01

    Incident reporting systems have become a central mechanism of most health services patient safety strategies. In this article we compare health professionals' anonymous, free text responses in an evaluation of a newly implemented electronic incident management system. The professions' answers were compared using classic content analysis and Leximancer, a computer assisted text analysis package. The classic analysis identified issues which differentiated the professions. More doctors commented on lack of feedback following incidents and evaluated the system negatively. More allied health staff found that the system lacked fields necessary to report incidents. More nurses complained incident reporting was time consuming. The Leximancer analysis revealed that while the professions all used the more frequently employed concepts (which described basic components of the reporting system), nurses and allied health shared many additional concepts concerned with actual reporting. Doctors applied fewer and more unique (used only by one profession) concepts when writing about the system. Doctors' unique concepts centred on criticism of the incident management system and the broader implications of safety issues, while the other professions' unique concepts focused on more practical issues. The classic analysis identified specific problems needing to be targeted in ongoing modifications of the system. The Leximancer findings, while complementing the classical analysis results, gave greater insight into professional groups' attitudes that relate to use of the system, e.g. doctors' relatively limited conceptual vocabulary regarding the system was consistent with their lower incident reporting rates. Such professional differences in reaction to healthcare innovations may constrain inter-disciplinary communication and cooperation.

  4. An exploration of issues of management and intention to stay: allied health professionals in South West Victoria, Australia.

    Stagnitti, Karen; Schoo, Adrian; Dunbar, James; Reid, Catherine

    2006-01-01

    Management of allied health staff and services often has implications for staff stability and retention. A survey of allied health staff in South West Victoria was conducted in 2003 to explore issues relating to recruitment and retention. Findings relating to management and retention of staff in their current job are addressed in this report. A total of 138 staff returned their questionnaires. Results were related to Maslow's hierarchy of needs, level of belonging, with professional needs identified as feeling supported, orientation to the position, clear job description, and able to recommend the position to others. Qualitative data showed that recommending the position was associated with job satisfaction, autonomy, flexibility, and variety of work. The immediate management structure was significantly related to retention. Reasons given for intending to leave were related to management categories. These were management structure, lack of career structure, and lack of professional support. Reasons given by respondents for not recommending their current position were as follows: not for long-term career, risk of deskilling if staying too long, and financially unrewarding. These reasons were also related to management. Positive reasons for staying, which were related to management, included flexible work conditions, variety of clinical and management experience, good working environment, good support, and autonomy. Recommendations are given for organizational development and training for managers.

  5. Knowledge and beliefs concerning evidence-based practice amongst complementary and alternative medicine health care practitioners and allied health care professionals: A questionnaire survey

    Khan Khalid S

    2008-07-01

    Full Text Available Abstract Background Evidence-based practice (EBP has become an important competency in many allied and complementary and alternative medicine (CAM health care practitioners' professional standards of proficiency. Methods To compliment an EBP course for allied health care professionals and CAM practitioners, we undertook a questionnaire survey to assess learning needs. We developed a questionnaire to measure allied health care professionals and CAM practitioners' basic knowledge, skills and beliefs concerning the main principles of EBP. The questionnaires were administered to all attendees of one-day EBP workshops. Results During 2004–5 we surveyed 193 allied health care professionals and CAM practitioners who attended one-day EBP courses prior to commencement of teaching. Of the respondents 121 (62.7% were allied health care professionals and 65 (33.7% practitioners stated that they work in the CAM field Our survey found that the majority of the respondents had not previously attended a literature appraisal skills workshop (87.3% or received formal training in research methods (69.9%, epidemiology (91.2% or statistics (80.8%. Furthermore, 67.1% of practitioners specified that they felt that they had not had adequate training in EBM and they identified that they needed more training and education in the principles of EBM (86.7%. Differences in knowledge and beliefs concerning EBP amongst allied and CAM practitioners were found and length of time since qualification was also found to be an important factor in practitioner's beliefs. More CAM practitioners compared to allied health professionals accessed educational literature via the Internet (95.3% v 68.1%, p = 0.008. Whilst, practitioners with more than 11 years experience felt that original research papers were far more confusing (p = 0.02 than their less experienced colleagues. Conclusion The results demonstrate that practitioner's learning needs do vary according to the type of profession

  6. Prévision de l'épaisseur du film passif d'un acier inoxydable 316L soumis au fretting corrosion grâce au Point Defect Model, PDM Predicting the steady state thickness of passive films with the Point Defect Model in fretting corrosion experiments

    Geringer Jean

    2013-11-01

    Full Text Available Les implants orthopédiques de hanche ont une durée de vie d'environ 15 ans. Par exemple, la tige fémorale d'un tel implant peut être réalisée en acier inoxydable 316L ou 316LN. Le fretting corrosion, frottement sous petits déplacements, peut se produire pendant la marche humaine en raison des chargements répétés entre le métal de la prothèse et l'os. Plusieurs investigations expérimentales du fretting corrosion ont été entreprises. Cette couche passive de quelques nanomètres, à température ambiante, est le point clef sur lequel repose le développement de notre civilisation, selon certains auteurs. Ce travail vise à prédire les épaisseurs de cette couche passive de l'acier inoxydable soumis au fretting corrosion, avec une attention spécifique sur le rôle des protéines. Le modèle utilisé est basé sur le Point Defect Model, PDM (à une échelle microscopique et une amélioration de ce modèle en prenant en compte le processus de frottement sous petits débattements. L'algorithme génétique a été utilisé pour optimiser la convergence du problème. Les résultats les plus importants sont, comme démontré avec les essais expérimentaux, que l'albumine, la protéine étudiée, empêche les dégradations de l'acier inoxydable aux plus faibles concentrations d'ions chlorure ; ensuite, aux plus fortes concentrations de chlorures, un temps d'incubation est nécessaire pour détruire le film passif. Some implants have approximately a lifetime of 15 years. The femoral stem, for example, should be made of 316L/316LN stainless steel. Fretting corrosion, friction under small displacements, should occur during human gait, due to repeated loadings and un-loadings, between stainless steel and bone for instance. Some experimental investigations of fretting corrosion have been practiced. As well known, metallic alloys and especially stainless steels are covered with a passive film that prevents from the corrosion and degradation

  7. Étude expérimentale de l'interaction laser-matière dans le cas du soudage d'un acier inoxydable austénitique par laser Nd:YAG continu de 2 kW

    Dumord, E.; Jouvard, J. M.; Grevey, D.; Druetta, M.; Ottavi, P.

    1997-05-01

    The laser-matter interaction acting during cw 2 kW Nd:YAG laser welding of an austenitic stainless steel is studied and particulary the effects linked to the presence of a keyhole in the liquid bath. This is done in order to define parameters useful to the process modelling. The absorption factor of target has been measured in order to better understand the Nd:YAG laser/stainless steel 304 interaction. Then an experimental approach of the keyhole angle value determination is proposed. Values are presented showing the important keyhole angle at the bottom of the bead. Finally a study relative to the plume above the keyhole shows that it is responsible for the formation of the nail-head part, observed on the experimental melting zone, by laser beam scattering. L'interaction laser-matière se produisant lors du soudage par laser Nd:YAG continu de 2kW d'un acier inoxydable austénitique est étudiée, et notamment les effets liés à la présence du capillaire dans le bain liquide, de façon à définir les paramètres utiles à la modélisation du processus. Le facteur d'absorption des cibles utilisées a été mesuré afin de mieux appréhender l'interaction laser Nd:YAG/acier inoxydable austénitique 304. Puis une approche expérimentale de détermination de l'angle d'inclinaison du capillaire est proposée. Des valeurs sont présentées montrant la forte inclinaison du capillaire en fond de cordon. Finalement une étude relative au panache présent audessus du capillaire met en évidence qu'il est responsable de la formation de la partie en tête de clou observée sur les zones fondues expérimentales par diffusion du faisceau laser

  8. Mida teha Tarmo Looduse olukorras? / Lukas, Tõnis; Ginter, Jüri; Raba, Rannar; Välis, Meelis; Lunter, Alli; Otepalu, Olavi

    2008-01-01

    Küsimusele vastavad haridusminister Tõnis Lukas, Tartu ülikooli haridusteaduskonna prodekaan Jüri Ginter, "Sakala" arvamustoimetaja Rannar Raba, Kullamaa keskkooli direktor Meelis Välis, Viljandi maagümnaasiumi õpetaja Alli Lunter ja Audentese gümnaasiumi õppealajuhataja Olavi Otepalu

  9. Orthomolecular Approach to the Treatment of Schizophrenia, Childhood Psychoses, and Allied Disorders Such as: Hyperactivity, Autism, Hypoglycemia, and Sub Clinical Pellagra.

    Lall, Geeta Rani

    Presented is research to support the orthomolecular rather than the psychodynamic approach to treating schizophrenia, psychoses, and allied disorders in children. The orthomolecular approach, also known as orthomolecular psychiatry, is reported to involve the administration of megavitamins (following a study to determine biochemical needs),…

  10. Electrochemical Formation of Al-Li Alloys by Codeposition of Al and Li from LiCl-KCl-AlF3 Melts at 853 K

    SUN Yi; ZHANG Mi-lin; HAN Wei; LI Mei; YANG Yu-sheng

    2013-01-01

    The electrochemical behavior of Al(Ⅲ) ions was studied in molten LiCl-KCl melts on a molybdenum electrode.Cyclic voltammetry,chronopotentiometry and chronoamperometry were used to explore the deposition mechanism of Al and Li.Cyclic voltammetry expriment indicates that under potential deposition(UPD) of lithium on pre-deposited aluminium led to the formation of liquid Al-Li alloys at 853 K.The diffusion coefficient of Al(Ⅲ) ions at 853 K in LiCl-KCl-AlF3(1%,mass fraction) melts was determined to be (2.79±0.05)× 10-5 cm2/s.Chronopotentiograms and chronoamperograms demonstrate that the codeposition of Al(Ⅲ) and Li(Ⅰ) ions formed Al-Li alloys at cathodic current densities higher than-0.28 A/cm2 or cathodic potentials more negative than-2.20 V.X-Ray diffraction(XRD) pattern indicates that Al-Li alloys with different phases formed via galvanostatic electrolysis.Inductively coupled plasma(ICP) analyses of the samples obtained by electrolysis show that lithium and aluminium contents of Al-Li alloys could be controlled by AlF3 concentration and current intensity.

  11. Differences between African-American and Caucasian students on enrollment influences and barriers in kinesiology-based allied health education programs.

    Barfield, J P; Cobler, D C; Lam, Eddie T C; Zhang, James; Chitiyo, George

    2012-06-01

    Kinesiology departments have recently started to offer allied health education programs to attract additional students to teacher education units (9). Although allied health professions offer increased work opportunities, insufficient enrollment and training of minority students in these academic fields contribute to underrepresentation in the workforce (3). To improve workforce diversity, kinesiology departments must understand how enrollment influences and barriers differ by race among prospective students. Therefore, the purpose of this study was to identify differences in allied health education enrollment influences and enrollment barriers between minority and Caucasian students. Participants (n = 601) consisted of students enrolled in kinesiology-based allied health education programs. Multivariate ANOVA was used to compare group differences in enrollment decision making. "Personal influence," "career opportunity," and "physical self-efficacy" were all significantly stronger enrollment influences among African-American students than among Caucasian students, and "social influence," "experiential opportunity," "academic preparation," and "physical self-efficacy" were all perceived as significantly greater barriers compared with Caucasian students. Findings support the need to recruit African-American students through sport and physical education settings and to market program-based experiential opportunities.

  12. Knowledge and Attitudes of Allied Health Professional Students regarding the Stroke Rehabilitation Team and the Role of the Speech and Language Therapist

    Byrne, Aine; Pettigrew, Catharine M.

    2010-01-01

    Background: One of the major barriers to effective team working among healthcare professionals is a lack of knowledge of each other's roles. The importance of understanding Irish healthcare students' attitudes towards team working and each other's roles led to the development of this study. Aims: The aims were to investigate allied health…

  13. Cost Effective Analysis of New Markets: First Steps of Enrollment Management for Nursing and Allied Health Programs. AIR 1997 Annual Forum Paper.

    Coyne, Thomas J.; Nordone, Ronald; Donovan, Joseph W.; Thygeson, William

    This paper describes the initial analyses needed to help institutions of higher education plan majors in nursing and allied health as institutions look for new markets based on demographic and employment factors. Twelve variables were identified and weighted to describe an ideal recruitment market. Using a three-phase process, potential U.S.…

  14. Statistical near-real-time accountancy procedures applied to AGNS (Allied General Nuclear Services) minirun data using PROSA

    Beedgen, R.

    1988-03-01

    The computer program PROSA (PROgram for Statistical Analysis of near-real-time accountancy data) was developed as a tool to apply statistical test procedures to a sequence of materials balance results for detecting losses of material. First applications of PROSA to model facility data and real plant data showed that PROSA is also usable as a tool for process or measurement control. To deepen the experience for the application of PROSA to real data of bulk-handling facilities, we applied it to uranium data of the Allied General Nuclear Services miniruns, where accountancy data were collected on a near-real-time basis. Minirun 6 especially was considered, and the pulsed columns were chosen as materials balance area. The structure of the measurement models for flow sheet data and actual operation data are compared, and methods are studied to reduce the error for inventory measurements of the columns.

  15. Study on the characteristics and thermal stability of nanostructures in adiabatic shear band of 2195 Al-Li alloy

    Yang, Yang; Chen, Yadong; Jiang, Lihong; Li, Meng; Zhang, Qingming; Tang, Tiegang

    2015-11-01

    Adiabatic shear bands (ASB) were obtained by dynamic shearing with a split Hopkinson pressure bar in the hat-shaped specimens of 2195-T6 Al-Li alloy. TEM observations reveal that grains in ASB are mainly equiaxed with the grain size from 50 to 100 nm. The kinetics possibility of instant refinement of grains can well be explained with the rotation dynamic recrystallization mechanism. EBSD is used to investigate microstructure evolution in ASB after annealed at 100-400 °C for 1 h. Results show that grain size increases rapidly at higher annealing temperature, and grains grow from 0.22 μm at 300 °C to 1.77 μm at 400 °C. Microhardness measurement indicated that the microhardness value rises slowly with temperature increases and then drops quickly at 300 °C. The study indicates that the nanostructure in ASB is thermally stable below 300 °C.

  16. Structural properties and relative stability of (meta)stable ordered, partially ordered, and disordered Al-Li alloy phases

    Alam, Aftab; Johnson, D. D.

    2012-04-01

    We resolve issues that have plagued reliable prediction of relative phase stability for solid solutions and compounds. Due to its commercially important phase diagram, we showcase the Al-Li system because historically density-functional theory (DFT) results show large scatter and limited success in predicting the structural properties and stability of solid solutions relative to ordered compounds. Using recent advances in an optimal basis-set representation of the topology of electronic charge density (and, hence, atomic size), we present DFT results that agree reasonably well with all known experimental data for the structural properties and formation energies of ordered, off-stoichiometric partially ordered, and disordered alloys, opening the way for reliable study in complex alloys.

  17. Mechanical effects induced by shock waves generated by high energy laser pulses

    Fournier, J.; Ballard, P.; Merrien, P.; Barralis, J.; Castex, L.; Fabbro, R.

    1991-09-01

    Specimens made of low alloy and non alloyed medium carbon steels were subjected to high energy laser pulses. Direct ablation and confined plasma procedures were both investigated. An optimum impulse momentum transfer to the material is attained with a pulse duration of 30 ns and a power density of 10 GW .cm^2. Fatigue testing shows that the fatigue strengths of the selected materials are significantly increased. This can be related to the fact that laser shock processing generates an appropriate residual compressive stress field in a sufficiently thick layer and does not alter the initial surface roughness. In addition, the use of cumulative laser impacts and of dual treatment combining thermal and mechanical effects of the laser beam have been investigated and shown to result in an enhanced fatigue strength. Des échantillons d'acier éventuellement faiblement allié sont irradiés par un ou plusieurs pulses laser ayant une intensité comprise entre 1 et 100 GW/cm^2 et une durée d'émission laser de 3 ou 30 ns, les deux configurations d'ablation directe ou de plasma confiné étant utilisées. Les contraintes résiduelles résultant du passage de l'onde de choc sont analysées à l'aide de la technique de diffraction de rayons X. D'après cette étude, il apparaît clairement que les valeurs d'intensité et de durée d'émission laser les plus appropriées sont respectivement 10 GW/cm^2 et 30 ns. Ces valeurs correspondent à l'optimum de transfert d'impulsion. De plus, l'influence du nombre d'impacts laser utilisés est discuté et un essai de fatigue montre que ce traitement mécanique de surface augmente de manière significative la limite d'endurance du matériau étudié.

  18. Étude expérimentale du comportement cyclique d'un acier du type 316 L sous chargement multiaxial complexe en traction-torsion-pressions interne et externe

    Bocher, L.; Delobelle, P.

    1997-09-01

    are very rich in informations and lead to classify the different types of loading, with two or three cyclic components, with respect to the observed supplementary hardening. This classification was established as follows: i) The in-phase tests with two or three components (δ = \\varphi = 0^circ); no supplementary hardening is observed. ii) The tension-pressure tests such as r_1 = 1, \\varphi = 90^circ and r_1 = - 1, \\varphi = 60^circ, the hardening is slightly inferior to that of tension-torsion tests. iii) The tension-torsion tests such as r_2 = 1 and δ = 90^circ, where a substantial additionnal hardening takes place. iv) The tension-torsion-pressure tests where the three components are strongly shifted, namely: r_1 = r_2 = 1, δ = 90^circ and \\varphi = 60^circ, and r_2 = 1, r_1 = -1, δ = 41.4^circ and \\varphi = 82.8^circ. The hardening is slightly superior to the one recorded in tension-torsion. A more thorough study is in preparation which considers all the possible combinations in tension-torsion-pressures, and will be performed on the same material. The early results tend to validate the observations presented in this article. Cette étude réside dans la détermination expérimentale du comportement à la température ambiante de l'acier inoxydable 316 L sous chargement cyclique non proportionnel en traction-torsion-pressions interne et externe. Les deux ou trois déformations sinusoïdales appliquées sont soit en phase, soit hors-phase et l'on étudie l'amplitude du durcissement supplémentaire en fonction du degré de multiaxialité. On présente quelques boucles stabilisées typiques. Par rapport au durcissement supplémentaire maximal, les différents essais peuvent être classés comme suit: essais en phase (pas de durcissement supplémentaire), essais de traction-pressions hors-phase, essais de traction-torsion hors phase et essais de traction-torsion-pressions avec déphasages conséquents.

  19. A thematic analysis of the role of the organisation in building allied health research capacity: a senior managers’ perspective

    Golenko Xanthe

    2012-08-01

    Full Text Available Abstract Background Evidence-based practice aims to achieve better health outcomes in the community. It relies on high quality research to inform policy and practice; however research in primary health care continues to lag behind that of other medical professions. The literature suggests that research capacity building (RCB functions across four levels; individual, team, organisation and external environment. Many RCB interventions are aimed at an individual or team level, yet evidence indicates that many barriers to RCB occur at an organisational or external environment level. This study asks senior managers from a large healthcare organisation to identify the barriers and enablers to RCB. The paper then describes strategies for building allied health (AH research capacity at an organisational level from a senior managers’ perspective. Methods This qualitative study is part of a larger collaborative RCB project. Semi-structured in-depth interviews were conducted with nine allied health senior managers. Recorded interviews were transcribed and NVivo was used to analyse findings and emergent themes were defined. Results The dominant themes indicate that the organisation plays an integral role in building AH research capacity and is the critical link in creating synergy across the four levels of RCB. The organisation can achieve this by incorporating research into its core business with a whole of organisation approach including its mission, vision and strategic planning. Critical success factors include: developing a co-ordinated and multidisciplinary approach to attain critical mass of research-active AH and enhance learning and development; support from senior managers demonstrated through structures, processes and systems designed to facilitate research; forming partnerships to increase collaboration and sharing of resources and knowledge; and establishing in internal framework to promote recognition for research and career path

  20. Assessing the contribution of prescribing in primary care by nurses and professionals allied to medicine: a systematic review of literature

    Bhanbhro Sadiq

    2011-12-01

    Full Text Available Abstract Background Safe and timely access to effective and appropriate medication through primary care settings is a major concern for all countries addressing both acute and chronic disease burdens. Legislation for nurses and other professionals allied to medicine to prescribe exists in a minority of countries, with more considering introducing legislation. Although there is variation in the range of medicines permitted to be prescribed, questions remain as to the contribution prescribing by nurses and professionals allied to medicine makes to the care of patients in primary care and what is the evidence on which clinicians, commissioners of services and policy makers can consider this innovation. Methods A integrative review of literature on non-medical prescribing in primary care was undertaken guided by dimensions of health care quality: effectiveness, acceptability, efficiency and access. Results 19 papers of 17 empirical studies were identified which provided evidence of patient outcome of non medical prescribing in primary care settings. The majority were undertaken in the UK with only one each from the USA, Canada, Botswana and Zimbabwe. Only two studies investigated clinical outcomes of non-medical prescribing. Seven papers reported on qualitative designs and four of these had fewer than ten participants. Most studies reported that non medical prescribing was widely accepted and viewed positively by patients and professionals. Conclusions Primary health care is the setting where timely access to safe and appropriate medicines is most critical for the well-being of any population. The gradual growth over time of legislative authority and in the numbers of non-medical prescribers, particularly nurses, in some countries suggests that the acceptability of non-medical prescribing is based on the perceived value to the health care system as a whole. Our review suggests that there are substantial gaps in the knowledge base to help evidence

  1. Laser-induced reversion of $\\delta^{'}$ precipitates in an Al-Li alloy: Study on temperature rise in pulsed laser atom probe

    Khushaim, Muna; Al-Kassab, Talaat

    2015-01-01

    The influence of tuning the laser energy during the analyses on the resulting microstructure in a specimen utilizing an ultra-fast laser assisted atom probe was demonstrated by a case study of a binary Al-Li alloy. The decomposition parameters, such as the size, number density, volume fraction and composition of $\\delta^{'}$ precipitates, were carefully monitored after each analysis. A simple model was employed to estimate the corresponding specimen temperature for each value of the laser energy. The results indicated that the corresponding temperatures for the laser energy in the range of 10 to 80 pJ are located inside the miscibility gap of the binary Al-Li phase diagram and fall into the metastable equilibrium field. In addition, the corresponding temperature for a laser energy of 100 pJ was in fairly good agreement with reported range of $\\delta^{'}$ solvus temperature, suggesting a result of reversion upon heating due to laser pulsing.

  2. Fatigue Crack Growth Rate Test Results for Al-Li 2195 Parent Metal, Variable Polarity Plasma Arc Welds and Friction Stir Welds

    Hafley, Robert A.; Wagner, John A.; Domack, Marcia S.

    2000-01-01

    The fatigue crack growth rate of aluminum-lithium (Al-Li) alloy 2195 plate and weldments was determined at 200-F, ambient temperature and -320-F. The effects of stress ratio (R), welding process, orientation and thickness were studied. Results are compared with plate data from the Space Shuttle Super Lightweight Tank (SLWT) allowables program. Data from the current series of tests, both plate and weldment, falls within the range of data generated during the SLWT allowables program.

  3. Involvement of practice nurses and allied health professionals in the development and management of care planning processes for patients with chronic disease – A pilot study

    Jones, KM; Adaji, A; Schattner, PS

    2014-01-01

    Introduction: Medicare items were introduced in 2005 to encourage general practitioners (GPs) to involve other healthcare providers in the management of patients with chronic disease. However, there appears to be barriers to converting financial incentives and the use of information technology as a communication tool to better patient outcomes. The aim of this study was to explore these barriers from the perspectives of practice nurses and allied health practitioners.

  4. Lessons from U.S. Allies in Security Cooperation with Third Countries: The Cases of Australia, France, and the United Kingdom

    2011-01-01

    also Lieutenant-Colonel Jérôme de Lespinois, “Qu’est-ce que la Diplomatie Aérienne?” DSI Magazine, June 4, 2010. 36 Lessons from U.S. Allies in... Diplomatie Aérienne?,” DSI Magazine, June 4, 2010. As of September 30, 2010: http://www.dsi-presse.com/?p=674 Lewis, J. A. C., “France Reports Rise

  5. From “allies without alliance” to concerted action: Romania and Finland in the aftermath of the Operation Barbarossa (1941

    Silviu Miloiu

    2010-11-01

    Full Text Available This study describes the relationship between two small and lesser states joining the German attack against Soviet Union in an attempt to recapture the territories lost to Soviet Union in 1940. It is conceived as an in-depth analysis of the Romanian-Finnish relations based on the criticism of archival sources discovered in the Romanian, Finnish and British archives. Becoming “allies without alliance” almost overnight, the relations between the two countries acknowledged a quick shift from low profile bonds to an agreement based on a combination of balance of power and joint action. The aim was to remove the threat Russia was posing to the two countries and to increase their influence at a peace conference to be open following the expected defeat of their big neighbour. Romania was the advocate of closer ties between the two countries keeping in line with its search for influence rather than autonomy in its foreign relations, while Finland was more prudent consistent with its choice for autonomy rather than influence.

  6. [The experience in organizing the medical support of allied convoys during the Great Patriotic War on the northern maritime theater].

    Chernikov, O G; Chernyĭ, V S; Mishin, Iu A; Soshkin, P A; Fisun, A V

    2014-05-01

    The medical support of allied convoys during the Great Patriotic War had a number of features. The Intensity of power of the fighting, the meteorological conditions, the composition of convoy's forces, the kind of enemy's weapon - had a significant impact on the structure of losses in personnel. The main type of medical care on the ships of 2-3rd rank was predoctor care. On the large and small antisubmarine ships and torpedo boats - it was first aid. The factor which has been affecting the amount of assistance - was a one-time inflow of a significant number of victims. Medical-evacuation provision of the convoys was carried out by the ships medical service without the use of amplification and sanitary ships. The most part of the wounded were taken to the coastal fleet hospitals later than 12 hours after the wound. The war experience has shown that in the distant convoys qualified surgical assistance may be provided in case of organizing it in this convoy and in case of using high-speed vehicles.

  7. IN SEARCH OF ALLIES. THE USSR AND THE WESTERN POWERS ON THE EVE OF THE SECOND WORLD WAR

    A. G. IVANOV

    2016-01-01

    Full Text Available The article analyses the problems which emerged on the eve of the Second World War: the European crisis of 1939, Anglo-French guarantees to countries of Eastern Europe, talks between the USSR, Great Britain and France and the Soviet-German non-aggression Pact. In conditions of the acutest crisis a question of general security acquired a key meaning. To stop the aggressor and to prevent global catastrophe was only possible by collective efforts of the great powers and their allies. Great Britain and France guaranteed independence of several countries of Eastern Europe, but they could not compensate the absence of a grand anti-German alliance. The USSR was striving to erect a system of collective security, but its possibilities were limited. More than that Great Britain and France did not refuse the idea of appeasing Germany at the expense of Poland, and this actually excluded their participation in anti-German coalition. The unwillingness of the Western powers to cooperate with the USSR closely showed itself at the AngloFrench-Soviet talks in spring and summer 1939. As a result of this the USSR, having no alternative, agreed to sign the non-aggression Pact with Germany.

  8. Prediction of forming limit curve (FLC) for Al-Li alloy 2198-T3 sheet using different yield functions

    Li Xiaoqiang; Song Nan; Guo Guiqiang; Sun Zhonggang

    2013-01-01

    The Forming Limit Curve (FLC) of the third generation aluminum-lithium (Al-Li) alloy 2198-T3 is measured by conducting a hemispherical dome test with specimens of different widths. The theoretical prediction of the FLC of 2198-T3 is based on the M-K theory utilizing respectively the von Mises, Hill’48, Hosford and Barlat 89 yield functions, and the different predicted curves due to different yield functions are compared with the experimentally measured FLC of 2198-T3. The results show that though there are differences among the four predicted curves, yet they all agree well with the experimentally measured curve. In the area near the planar strain state, the predicted curves and experimentally measured curve are very close. The predicted curve based on the Hosford yield function is more accurate under the tension-compression strain states described in the left part of the FLC, while the accuracy is better for the predicted curve based on Hill’48 yield function under the tension-tension strain states shown in the right part.

  9. Nigella sativa Fixed and Essential Oil Supplementation Modulates Hyperglycemia and Allied Complications in Streptozotocin-Induced Diabetes Mellitus

    Muhammad Tauseef Sultan

    2014-01-01

    Full Text Available In the recent era, diabetes mellitus has emerged as one of the significant threats to public health and this situation demands the attention of the researchers and allied stakeholders. Dietary regimens using functional and nutraceutical foods are gaining wide range of acceptance and some traditional medicinal plants are of considerable importance. The main objective of this instant study was to explore the antidiabetic potential of Nigella sativa fixed oil (NSFO and essential oil (NSEO. Three experimental groups of rats received diets during the entire study duration, that is, D1 (control, D2 (NSFO: 4.0%, and D3 (NSEO: 0.30%. Experimental diets (NSFO & NSEO modulated the lipid profile, while decreasing the antioxidant damage. However, production of free radicals, that is, MDA, and conjugated dienes increased by 59.00 and 33.63%, respectively, in control. On the contrary, NSFO and NSEO reduced the MDA levels by 11.54 and 26.86% and the conjugated dienes levels by 32.53 and 38.39%, respectively. N. sativa oils improved the health and showed some promising anti-diabetic results.

  10. Three-dimensional effects of microstructures on short fatigue crack growth in an Al-Li 8090 alloy

    Wen, Wei; Zhai, Tongguang

    2011-09-01

    Al-Li 8090 alloy specimens were fatigued using a self-aligning four-point bend rig at R = 0.1 and room temperature, in air, under constant maximum stress control. The crystallographic characteristics of fatigue crack initiation and early growth were studied using EBSD. It was found that the growth behaviour of a short crack were controlled by the twist (α) and tilt (β) components of crack plane deflection across each of the first 20 grain boundaries along the crack path, and that the α angle at the first grain boundary encountered by a micro-crack was critical in determining whether the crack could become propagating or non-propagating. In addition to the orientations of the two neighbouring grains, the tilt of their boundary could also affect α across the boundary. A minimum α-map for a vertical micro-crack was calculated to evaluate the resistance to crack growth into a neighbouring grain with a random orientation. Such an α-map is of value in alloy design against fatigue damage by optimising texture components in the alloys.

  11. Segregation Study of the β phase on the Al-Li Alloy Surface using Auger Electron Spectroscopy

    Belkhiat, S.; Keraghel, F.

    2009-11-01

    Auger Electron spectroscopy (AES) has been used to study lithium segregation on Al-3.49wt%-Li alloy surface. In this work, the surface atomic composition as a function of temperature was followed. In our previous works, the activation energy of Li segregation has been determined experimentally being in agreement with the resulted theoretical value. In this paper, one showed that the segregation energy of Li on the surface depends of the crystalline structure and of the Li content in the Al-Li alloy matrix. β-AlLi phase on the alloy surface, used in the power sources for the propulsion of electrical vehicles and for stocking energy, is obtained by progressive heating. We showed that the segregated lithium on the alloy surface is reversible as a function of decreasing temperature and consequently β-AlLi phase is converted in α-AlLi phase. On the other hand, the brutal heating of the sample drives to the conversion of the α-AlLi phase to β-AlLi phase and stabilizes the surface towards other segregation; therefore the conversion of β-AlLi phase to α-AlLi phase is irreversible.

  12. Strain hardening and jump-like deformation of ultrafine polycrystalline Al-Li solid solutions at 0.5 K

    Isaev, N. V.; Shumilin, S. E.; Zabrodin, P. A.; Geidarov, V. G.; Grigorova, T. V.; Fomenko, V. S.; Braude, I. S.; Pustovalov, V. V.

    2013-07-01

    This is a study of the effect of microstructure created by severe plastic deformation (SPD) and annealing on strain hardening and jump-like deformation in Al-Li alloys. It is shown that under tension at 0.5 K, SPD processed polycrystals retain a significant strain hardening rate and have high strength and ductility. SPD also simulates unstable (jump-like) flow of the polycrystals owing to dislocation dynamics that shows up as stress jumps in the tension curve. The average amplitude of the jumps increases with strain, while the dislocation amplitude distribution corresponds to collective motion of dislocation avalanches with a distinctive scale. Jump-like deformation is partially suppressed by high-temperature annealing, while the distribution of the jump amplitudes is described by a power law. The relationship established between the coefficient of strain hardening and the average stress jump amplitude suggests a common dislocation dynamic for strain hardening and jump-like deformation at low temperatures. The observed features of low-temperature plastic deformation are treated as a consequence of changes in the grain sizes and density of dislocations owing to SPD and annealing.

  13. Student perceptions and learning outcomes of blended learning in a massive first-year core physiology for allied health subjects.

    Page, Janelle; Meehan-Andrews, Terri; Weerakkody, Nivan; Hughes, Diane L; Rathner, Joseph A

    2017-03-01

    Evidence shows that factors contributing to success in physiology education for allied health students at universities include not only their high school achievement and background but also factors such as confidence with their teachers and quality of their learning experience, justifying intensive and continued survey of students' perceptions of their learning experience. Here we report data covering a 3-yr period in a physiology subject that has been redesigned for blended and online presentation. Consistent with previous reports, we show that when we undertook a blended mode of delivery, students demonstrated better grades than traditional modes of teaching; however the absence of didactic teaching in this subject resulted in lower grades overall. Students have very strong positive attitudes to weekly quizzes (80% positive approval) but report ambivalent attitudes to online self-directed learning (61% negative perception), even though they had 2-h weekly facilitated workshops. Overwhelmingly, students who undertook the subject in a self-directed online learning mode requested more face-to-face-teaching (70% of comments). From these data, we suggest that there is a quantifiable benefit to didactic teaching in the blended teaching mode that is not reproduced in online self-directed learning, even when face-to-face guided inquiry-based learning is embedded in the subject.

  14. The Community Based Rehabilitation Programme of the University of the Philippines Manila, College of Allied Medical Professions

    Jeffrey Pe-Benito Datangel

    2012-02-01

    Full Text Available Purpose: This paper reports the process of development of a CBR programme by UP Manila College of Allied Medical Professions, and its impact on the stakeholders: persons with disabilities, students and alumni, CBR workers, local leaders and the agencies involved in the programme.Method: The impact of the programme was assessed through interviews, questionnaires, focus group discussions and review of secondary data and records.Results: The programme results show that the condition of persons with disabilities has improved and there has been a remarkable change in their knowledge, attitudes and skills. The positive attitudes, skills and values of students were enhanced, and the CBR programme was a “character builder” for them as rehabilitation professionals. The CBR workers who participated in the programme learnt to appreciate the potential of persons with disabilities and to accept their limitations. Another key result was the pledge by local leaders to sustain CBR in their own villages.Conclusions: The students and alumni reported that the CBR programme should be replicated for nation-building. The different stakeholders reported that it helped improve the quality of life of people with disabilities and contributed to community development.DOI: 10.5463/dcid.v22i3.110

  15. Using a Team Structure for Student-Assisted Facilitation of Laboratories in an Introductory Allied Health Microbiology Course

    David Jesse Sanchez

    2012-02-01

    Full Text Available As many instructors have noted, it is challenging to lead a successful microbiology laboratory, especially for students without sufficient prerequisite training such as in pre-allied health/nursing classes. In the community college setting, this is compounded by the lack of adequate resources, especially teaching assistants or others, to help individual students during a laboratory experience. In addition, there is much transition in the student population of the college so asking students who have completed a class to help in this setting is often impractical. To modify our system to allow students to more easily ask questions and get feedback, we designed a student facilitator system. This system allowed each student to be a leader of the team for a particular laboratory experience. Each student was individually trained to be supportive of the team as a whole. This program is useful in that it can be applied to any class-based laboratory setting to provide better student team interactions than if there were no facilitator.

  16. Effect of Rare Earth Cerium on Yield Strength Anisotropy of Al-Li Alloy Sheet and Its Theoretical Prediction

    赵志龙; 刘林; 陈铮

    2004-01-01

    The variation of yield strength along rolling direction, transverse direction and 45° to transverse direction of 2090 Al-Li alloy and 2090+Ce alloy sheet containing rare earth cerium was comparatively investigated. The difference of deformation texture in these two alloy sheets was analyzed by means of X-ray orientation distribution function (ODF). The results show that cerium has the effects of enhancing the Brass and S rolling texture components and reducing the recrystallized texture components of Cube and Goss. This is the reason that the anisotropic degree of yield strength in 2090+Ce sheet is higher than that of 2090 alloy sheet. The prediction of yield strength along various orientations in two alloy sheets was done based on Taylor/Bishop-Hill model, and the strengthening effect of grain boundary was evaluated using Hall-Petch relationship. A modified plastic inclusion model was proposed using the concept of grain-orientation factor and T1 phase orientation factor by fitting with tensile test results.

  17. Computer simulation of Al-Li alloy retrogression%Al-Li合金回归过程的数值模拟

    徐国栋; 沈智

    2012-01-01

    基于离散格点形式的Langevin方程,以Al-12%Li合金为对象,模拟合金完全回归的过程。结果表明,Al-Li合金完全回归过程经过Li的固溶,δ'相的回归,δ'相的无序化;Al-Li合金完全回归,其温度需要达到一定条件才可以发生,否则即使延长回归时间,有序相也只发生部分回归;温度越高,Al-Li合金完全回归时间越短,Li含量越低,发生完全回归的温度越低。%Based on Langevin equation of the discrete format,the evolution of retrogression of Al-12%Li alloy is investigated using computer simulation.The results show that the complete retrogression process of Al-Li alloy as solution of lithium,retrogression of δ′ and disorder of δ′.Al-Li alloy could retrogress completely when the temperature was reached certain conditions,otherwise even prolonged heat treatment time,the ordered phase could partially retrogress.The higher the temperature,the shorter time of Al-Li alloy completely retrogress.The less Li content,the lower temperature of Al-Li alloy completely retrogress.

  18. Development and early experience from an intervention to facilitate teamwork between general practices and allied health providers: the Team-link study

    Zwar Nick

    2010-04-01

    Full Text Available Abstract Background This paper describes the development and implementation of an intervention to facilitate teamwork between general practice and outside allied and community health services and providers. Methods A review of organizational theory and a qualitative study of 9 practices was used to design an intervention which was applied in four Divisions of General Practice and 26 urban practices. Clinical record review and qualitative interviews with participants were used to determine the key lessons from its implementation. Results Facilitating teamwork across organizational boundaries was very challenging. The quality of the relationship between professionals was of key importance. This was enabled by joint education and direct communication between providers. Practice nurses were key links between general practices and allied and community health services. Conclusions Current arrangements for Team Care planning provide increased opportunities for access to allied health. However the current paper based system is insufficient to build relationships or effectively share roles as part of a patient care team. Facilitation is feasible but constrained by barriers to communication and trust.

  19. A success of a genetics educational intervention for nursing and dietetic students: A model for incorporating genetics into nursing and allied health curricula.

    Cragun, Deborah L; Couch, Sarah C; Prows, Cynthia A; Warren, Nancy S; Christianson, Carol A

    2005-01-01

    Allied health care professionals and nurses provide genetic-related client services, such as eliciting family medical history information and discussing the genetic component of health conditions. However, these professionals report a lack of confidence in their ability to perform genetic services and have little formal education in genetics. A barrier to incorporating genetics into allied health curricula includes the limited flexibility to expand curricula. This barrier was addressed by incorporating a Web-based tutorial on basic genetics and a lecture on the genetics of diabetes into preexisting undergraduate nutrition courses for nursing and dietetic students. The vast majority of students enrolled in these required courses participated in the intervention. Most participants agreed that genetics is important to their future career. Following the intervention, students' knowledge of genetics and confidence in their ability to provide genetic-related services increased significantly. Despite the short-term success and positive student evaluations, a single educational intervention does not appear to be sufficient for students to become proficient in performing the recommended genetic competencies for all health care professionals. Recommendations and resources for incorporating genetics into allied health curricula are included.

  20. Liquid oxygen LOX compatibility evaluations of aluminum lithium (Al-Li) alloys: Investigation of the Alcoa 2090 and MMC weldalite 049 alloys

    Diwan, Ravinder M.

    1989-01-01

    The behavior of liquid oxygen (LOX) compatibility of aluminum lithium (Al-Li) alloys is investigated. Alloy systems of Alcoa 2090, vintages 1 to 3, and of Martin Marietta Corporation (MMC) Weldalite 049 were evaluated for their behavior related to the LOX compatibility employing liquid oxygen impact test conditions under ambient pressures and up to 1000 psi. The developments of these aluminum lithium alloys are of critical and significant interest because of their lower densities and higher specific strengths and improved mechanical properties at cryogenic temperatures. Of the different LOX impact tests carried out at the Marshall Space Flight Center (MSFC), it is seen that in certain test conditions at higher pressures, not all Al-Li alloys are LOX compatible. In case of any reactivity, it appears that lithium makes the material more sensitive at grain boundaries due to microstructural inhomogeneities and associated precipitate free zones (PFZ). The objectives were to identify and rationalize the microstructural mechanisms that could be relaxed to LOX compatibility behavior of the alloy system in consideration. The LOX compatibility behavior of Al-Li 2090 and Weldalite 049 is analyzed in detail using microstructural characterization techniques with light optical metallography, scanning electron microscopy (SEM), electron microprobe analysis, and surface studies using secondary ion mass spectrometry (SIMS), electron spectroscopy in chemical analysis (ESCA) and Auger electron spectroscopy (AES). Differences in the behavior of these aluminum lithium alloys are assessed and related to their chemistry, heat treatment conditions, and microstructural effects.

  1. Modélisation du procédé de soudage hybride Arc / Laser par une approche level set application aux toles d'aciers de fortes épaisseurs A level-set approach for the modelling of hybrid arc/laser welding process application for high thickness steel sheets joining

    Desmaison Olivier

    2013-11-01

    Full Text Available Le procédé de soudage hybride Arc/Laser est une solution aux assemblages difficiles de tôles de fortes épaisseurs. Ce procédé innovant associe deux sources de chaleur : un arc électrique produit par une torche MIG et une source laser placée en amont. Ce couplage améliore le rendement du procédé, la qualité du cordon et les déformations finales. La modélisation de ce procédé par une approche Level Set permet une prédiction du développement du cordon et du champ de température associé. La simulation du soudage multi-passes d'une nuance d'acier 18MnNiMo5 est présentée ici et les résultats sont comparés aux observations expérimentales. The hybrid arc/laser welding process has been developed in order to overcome the difficulties encountered for joining high thickness steel sheets. This innovative process gathers two heat sources: an arc source developed by a MIG torch and a pre-located laser source. This coupling improves the efficiency of the process, the weld bead quality and the final deformations. The Level-Set approach for the modelling of this process enables the prediction of the weld bead development and the temperature field evolution. The simulation of the multi-passes welding of a 18MnNiMo5 steel grade is detailed and the results are compared to the experimental observations.

  2. Contribution à la modélisation du soudage TIG des tôles minces d'acier austénitique 304L par un modèle source bi-elliptique, avec confrontation expérimentale

    Aissani, M.; Maza, H.; Belkessa, B.; Maamache, B.

    2005-05-01

    Ce travail contribue dans la modélisation du phénomène du soudage de l'acier inoxydable Austénitique 304L, afin d'étudier le comportement thermique d'un joint de soudure, obtenu par le procédé de soudage à l'arc électrique TIG (Tungsten-Inert-Gas). Le modèle simulant la source d'énergie de soudage, utilise une distribution surfacique Gaussienne du flux de chaleur provenant de l'arc électrique. La forme de cette source est supposée circulaire pour un premier cas et de forme bi-elliptique pour un second cas, tout en procédant à l'évaluation des champs et cycles thermiques à chaque instant, pour déterminer l'étendu des zones à risque, et l'effet de la vitesse de soudage sur ces dernières. Permettant ainsi de remonter par la suite, aux problèmes de contraintes résiduelles et déformations générées dans l'assemblage soudé. L'équation de chaleur régissant le problème est discrétisée par la méthode des volumes finis. Les calculs sont effectués en considérant que les propriétés physiques et thermiques ainsi que les conditions aux limites de convection et rayonnement, sont dépendante de la température. Pour évaluer la précision du modèle, une comparaison avec des mesures expérimentales de température d'un essai de soudage a été effectuée, les résultats indiquent un bon accord.

  3. Georgia Maternal and Infant Health Research Group (GMIHRG): Mobilizing Allied Health Students and Community Partners to Put Data into Action.

    Zertuche, Adrienne D; Spelke, Bridget; Julian, Zoë; Pinto, Meredith; Rochat, Roger

    2016-07-01

    Purpose Despite having an obstetrician/gynecologist (ob/gyn) workforce comparable to the national average, Georgia is ranked 50th in maternal mortality and 40th in infant mortality. The Georgia Maternal and Infant Health Research Group (GMIHRG) was founded in 2010 to evaluate and address this paradox. Description In the several years since GMIHRG's inception, its graduate allied health student researchers and advisors have collaborated with community partners to complete several requisite research initiatives. Their initial work demonstrated that over half the Georgia areas outside metropolitan Atlanta lack adequate access to obstetric services, and their subsequent research evaluated the reasons for and the consequences of this maldistribution of obstetric providers. Assessment In order to translate their workforce and outcomes data for use in policymaking and programming, GMIHRG created reader-friendly reports for distribution to a wide variety of stakeholders and prepared concise, compelling presentations with targeted recommendations for change. This commitment to advocacy ultimately enabled them to: (a) inspire the Georgia Study Committees on Medicaid Reform and Medical Education, (b) influence Georgia General Assembly abortion bills, medical scholarship/loan legislation, and appropriations, and (c) motivate programming initiatives to improve midwifery education and perinatal regionalization in Georgia. Conclusion GMIHRG members have employed inventive research methods and maximized collaborative partnerships to enable their data on Georgia's maternal and infant outcomes and obstetric workforce to effectively inform state organizations and policymakers. With this unique approach, GMIHRG serves as a cost-efficient and valuable model for student engagement in the translation of research into advocacy efforts, policy change, and innovative programming.

  4. A multilocus coalescent analysis of the speciational history of the Australo-Papuan butcherbirds and their allies.

    Kearns, Anna M; Joseph, Leo; Cook, Lyn G

    2013-03-01

    Changes in geology, sea-level and climate are hypothesised to have been major driving processes of evolutionary diversification (speciation and extinction) in the Australo-Papuan region. Here we use complete species-level sampling and multilocus (one mitochondrial gene, five nuclear loci) coalescent analyses to estimate evolutionary relationships and test hypotheses about the role of changes in climate and landscape in the diversification of the Australo-Papuan butcherbirds and allies (Cracticinae: Cracticus, Strepera, Peltops). Multilocus species trees supported the current classification of the morphologically, ecologically and behaviourally divergent Australian Magpie (Cracticus tibicen (previously Gymnorhina tibicen)) as a member of an expanded genus Cracticus, which includes seven other species with 'butcherbird' morphology and behaviour. Non-monophyly of currently recognised species within Peltops and the white-throated butcherbird species-group (C.argenteus, C.mentalis, C. torquatus) at both mtDNA and nuclear loci suggest that a comprehensive taxonomic revision is warranted for both of these groups. The time-calibrated multilocus species tree revealed an early divergence between the New Guinean rainforest-restricted Peltops lineage and the largely open-habitat inhabiting Cracticus (butcherbirds and magpies) plus Strepera (currawongs) lineage around 17-28Ma, as well as a relatively recent radiation of lineages within Cracticus over the past 8Ma. Overall, patterns and timings of speciation were consistent with the hypothesis that both the expansion of open sclerophyllous woodlands 25-30Ma and the formation of extensive grassland-dominated woodlands 6-8Ma allowed the radiation of lineages adapted to open woodland habitats.

  5. Antimicrobial use and resistance in aquaculture: findings of a globally administered survey of aquaculture-allied professionals.

    Tuševljak, N; Dutil, L; Rajić, A; Uhland, F C; McClure, C; St-Hilaire, S; Reid-Smith, R J; McEwen, S A

    2013-09-01

    There is limited published information regarding antimicrobial use (AMU) and antimicrobial resistance (AMR) in aquaculture. Our objective was to determine the opinions of aquaculture-allied professionals around the world on the frequency of AMU and AMR in common aquatic species. The study questionnaire included five sections: respondent demographics, extent of AMU in aquaculture, frequency of observations of AMR in aquaculture, AMR monitoring and surveillance and antimicrobial susceptibility testing in various jurisdictions. It was administered in English and Spanish to 604 professionals in 25 countries and with varying expertise in aquaculture. The response rate was 33% (199/604). Over half of the participants had >10 years of experience in aquaculture: 70% (140/199) were involved in fish health/clinical work and their primary experience was with salmon, tilapia, trout, shrimp (including prawn) and/or catfish. Tetracycline use was reported by 28%, 46%, 18%, 37% and 9% of respondents working with catfish, salmon, tilapia, trout and shrimp, respectively. Resistance to tetracycline in one or more species of bacteria was reported as 'frequent-to-almost always' for the same aquaculture species by 39%, 28%, 17%, 52% and 36% of respondents, respectively. 'Frequent-to-almost always' use of quinolone was reported by 70% (32/46) and 67% (8/12) of respondents from the United States and Canada, respectively, where quinolone products are not approved for aquaculture, and extra-label fluoroquinolone use is either prohibited (United States) or discouraged (Canada). Similar frequencies of quinolone use were also reported by the majority of respondents from Europe [70% (7/10)] and Asia [90% (9/10)] where labelled indications exist. This baseline information can be used to prioritize research or surveillance for AMU and AMR in aquaculture.

  6. Organochlorinated pesticides, PCBs, dioxins, and PBDEs in grey mullets (Liza ramada) and allis shads (Alosa alosa) from the Vilaine estuary (France).

    Bocquené, Gilles; Abarnou, Alain

    2013-02-01

    This study aimed to compare the contamination levels of various organohalogenated compounds in two migratory fish species in the Vilaine River in western France. Organochlorinated pesticides, polychlorinated biphenyls (PCBs), dioxins (polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDDs/Fs)), and polybrominated diphenyl ethers (PBDEs) were analyzed in two diadromous species from the Vilaine estuary, the grey mullet (Liza ramada)-an amphihaline species, and the allis shad (Alosa alosa)-an anadromous species. Fish were collected in spring 2004 and spring 2005, upstream and downstream of the Arzal Dam. PCB contamination varied from 27 to 200 ng g(-1) dry weight (d.w.). PCDDs/Fs, expressed in toxicity equivalent quantity (TEQ) varied from 0.4 to 2.8 pg g(-1) d.w. Dioxins and dioxin-like PCBs expressed in total TEQ varied from 1.4 to 18.8 pg g(-1) d.w. PBDE47 was present at around 2-10 ng g(-1) d.w. and concentrations of the insecticide dichlorodiphenyltrichloroethane breakdown product p,p'-dichlorodiphenylchloroethylene varied from 1 to 14 ng g(-1) d.w. For both species, specimens collected upstream were more contaminated. The grey mullet specimens were less contaminated than the allis shad when taken downstream of the dam but were more contaminated upstream. The allis shads presented intermediate contaminant concentrations with a less pronounced difference between upstream and downstream specimens. However, it is thought that shads do not feed when they spawn in the upstream parts of rivers, which should modify the contaminant concentrations. However, measurements in upstream shad samples show an unexpected increase of the contamination, which remains unexplained.

  7. Types of social media (Web 2.0) used by Australian allied health professionals to deliver early twenty-first-century practice promotion and health care.

    Usher, Wayne

    2011-01-01

    Types of social media (Web 2.0) usage associated with eight of Australia's major allied health professions (AHPs, n = 935) were examined. Australian AHPs are interacting with Web 2.0 technologies for personal use but are failing to implement such technologies throughout their health professions to deliver health care. Australian AHPs are willing to undertake online educational courses designed to up skill them about how Web 2.0 may be used for practice promotion and health care delivery in the early twenty-first century. Participants in this study indicated that educational courses that were offered online would be the preferred mode of delivery.

  8. Attitudes toward the elderly with CNS trauma: a cross-sectional study of neuroscientists, clinicians, and allied-health professionals.

    Furlan, Julio C; Fehlings, Michael G

    2009-02-11

    Despite the potential impact of ageist attitudes on outcomes of central nervous system (CNS)-injured patients, little has been reported on this issue. Given this, we sought to conduct a questionnaire-based survey to assess the attitudes toward the elderly among basic and clinical neuroscientists, clinicians, and allied-health professionals whose research or medical practice is focused on neurotrauma. We also reviewed all abstracts presented in the National Neurotrauma Symposia from 1984 to 2007 and identified previous studies on the potential effects of age/aging on outcomes. The Kogan's Old People (KOP) scale was used to assess attitudes toward elderly individuals among all members of the National Neurotrauma Society (NNS). Of the 504 registered members, 137 subjects completed the survey that was re-mailed for non-respondents 4 weeks apart. There were no significant differences between respondents of the first and second mailings regarding their demographic and professional profiles or regarding their responses. These results support the validity of our findings in spite of the relatively low mail survey response rate (27.2%). Female gender was significantly associated with more positive attitudes toward old people compared to males. Clinicians showed significantly fewer negative attitudes toward old people in comparison with basic and clinical neuroscientists. Of the 4,194 abstracts reviewed, we identified only 44 studies (1.05%) that were explicitly focused on the effects of aging/old age on neurotrauma. In conclusion, our questionnaire-based survey, which appears to be representative of the population of interest, recognized significant differences in the attitudes toward old people among various professional groups and between male and female professionals. These findings may reflect a lack of knowledge and misconceptions regarding the impact of aging and old age on outcomes after CNS trauma. Further research on the impact of aging on outcomes after

  9. Heihe Watershed Allied Telemetry Experimental Research (HiWATER): An Integrated Remote Sensing Experiment on Hydrological and Ecological Processes

    Li, X.; Liu, S.; Xiao, Q.; Ma, M.; Jin, R.; Che, T.

    2012-12-01

    A major research plan entitled "Integrated research on the eco-hydrological process of the Heihe River Basin" was launched by the National Natural Science Foundation of China in 2010. One of the key aims of this research plan is to establish a research platform that integrates observation, data management, and model simulation to foster 21st-century watershed science in China. Based on the diverse needs of interdisciplinary studies within this research plan, a program called the Heihe Watershed Allied Telemetry Experimental Research (HiWATER) is implemented. The overall objective of HiWATER is to improve the observability of hydrological and ecological processes, to build a world-class watershed observing system and to enhance the application ability of remote sensing in integrated eco-hydrological study and water recourse management at basin scale. We introduce the background, scientific objectives and experimental design of the HiWATER. The highlights are using flux observing matrix and eco-hydrological wireless sensor network to capture multi-scale heterogeneities, in order to challenge the complex issues such as heterogeneity, scaling, uncertainty, and closing water cycle at watershed scale. HiWATER has formally kicked off in May 2012 and will last four years till 2015. HiWATER encompasses fundamental experiments, thematic experiments, application experiments, remote sensing methods development and products generation, and an integrated information system. (1) Fundamental experiments: a) Microwave radiometer, imaging spectrometer, thermal imaging camera, light detection and ranging (LiDAR) and other sensors are used in the airborne missions to observe key eco-hydrological parameters. b) A comprehensive hydrometeorological observation network has been established in the entire Heihe River Basin, in order to provide more representative model parameters and forcing data. c) An eco-hydrological wireless sensor network (WSN) has been installed to capture the spatial

  10. Allying Our Markets

    2007-01-01

    The Hong Kong and Shanghai stock markets look for synergies Shanghai and Hong Kong, the two cities striving to be China’s financial center, are setting aside their competitive differ ences to discuss

  11. Laser-induced reversion of δ′ precipitates in an Al-Li alloy: Study on temperature rise in pulsed laser atom probe

    Khushaim, Muna Saeed Amin

    2016-06-14

    The influence of tuning the laser pulse energy during the analyses on the resulting microstructure in a specimen utilizing an ultra-fast laser assisted atom probe was demonstrated by a case study of a binary Al-Li alloy. The decomposition parameters, such as the size, number density, volume fraction, and composition of δ\\' precipitates, were carefully monitored after each analysis. A simple model was employed to estimate the corresponding specimen temperature for each value of the laser energy. The results indicated that the corresponding temperatures for the laser pulse energy in the range of 10 to 80 pJ are located inside the miscibility gap of the binary Al-Li phase diagram and fall into the metastable equilibrium field. In addition, the corresponding temperature for a laser pulse energy of 100 pJ was in fairly good agreement with reported range of δ\\' solvus temperature, suggesting a result of reversion upon heating due to laser pulsing. © 2016 Wiley Periodicals, Inc.

  12. Curricular transformation of health professions education in Tanzania: the process at Muhimbili University of Health and Allied Sciences (2008-2011).

    Ngassapa, Olipa D; Kaaya, Ephata E; Fyfe, Molly V; Lyamuya, Eligius F; Kakoko, Deodatus C; Kayombo, Edmund J; Kisenge, Rodrick R; Loeser, Helen; Mwakigonja, Amos R; Outwater, Anne H; Martin-Holland, Judy; Mwambete, Kennedy D; Kida, Irene; Macfarlane, Sarah B

    2012-01-01

    Tanzania requires more health professionals equipped to tackle its serious health challenges. When it became an independent university in 2007, Muhimbili University of Health and Allied Sciences (MUHAS) decided to transform its educational offerings to ensure its students practice competently and contribute to improving population health. In 2008, in collaboration with the University of California San Francisco (UCSF), all MUHAS's schools (dentistry, medicine, nursing, pharmacy, and public health and social sciences) and institutes (traditional medicine and allied health sciences) began a university-wide process to revise curricula. Adopting university-wide committee structures, procedures, and a common schedule, MUHAS faculty set out to: (i) identify specific competencies for students to achieve by graduation (in eight domains, six that are inter-professional, hence consistent across schools); (ii) engage stakeholders to understand adequacies and inadequacies of current curricula; and (iii) restructure and revise curricula introducing competencies. The Tanzania Commission for Universities accredited the curricula in September 2011, and faculty started implementation with first-year students in October 2011. We learned that curricular revision of this magnitude requires: a compelling directive for change, designated leadership, resource mobilization inclusion of all stakeholders, clear guiding principles, an iterative plan linking flexible timetables to phases for curriculum development, engagement in skills training for the cultivation of future leaders, and extensive communication.

  13. First principle calculation of Al, Li and intermetallic compounds for Al-Li system%Al-Li系统性质的第一原理计算

    陈红梅; 范常有; 方杰; 刘奕新; 欧阳义芳; 杜勇; 贺跃辉

    2009-01-01

    用第一原理方法对铝、锂及铝锂二元系统金属间化合物的稳定和亚稳相的原子体积、弹性性质及形成焓等热力学性质进行了计算,结果表明:计算的平均原子体积略大于实验值,计算的体积模量与已有的实验值符合得比较好,对铝锂系统来说,计算的体积模量随锂的浓度的增加单调下降.对铝锂系统的稳定和亚稳定相的形成焓的计算表明,最稳定相为B32结构的Al-Li金属间化合物.%The lattice constants, elastic properties and thermodynamic properties of aluminum, lithium and intermetallic compound for Al-Li system were calculated with density function theo-ry. The calculated lattice constants, elastic constants, isothermal bulk modulus and properties of dimer for aluminum and lithium agree very well with the experimental data. The calculated for-mation enthalpies and isothermal bulk moduli of Al-Li intermetallic compounds are in good agree-ment with the experimental data and the results of other theoretical results available.

  14. Investigation of Abnormal Grain Growth in a Friction Stir Welded and Spin-Formed Al-Li Alloy 2195 Crew Module

    Tayon, Wesley A.; Domack, Marcia S.; Hoffman, Eric K.; Hales, Stephen J.

    2013-01-01

    In order to improve manufacturing efficiency and reduce structural mass and costs in the production of launch vehicle structures, NASA is pursuing a wide-range of innovative, near-net shape manufacturing technologies. A technology that combines friction stir welding (FSW) and spin-forming has been applied to manufacture a single-piece crew module using Aluminum-Lithium (AL-Li) Alloy 2195. Plate size limitations for Al-Li alloy 2195 require that two plates be FSW together to produce a spin-forming blank of sufficient size to form the crew module. Subsequent forming of the FSW results in abnormal grain growth (AGG) within the weld region upon solution heat treatment (SHT), which detrimentally impacts strength, ductility, and fracture toughness. The current study seeks to identify microstructural factors that contribute to the development of AGG. Electron backscatter diffraction (EBSD) was used to correlate driving forces for AGG, such as stored energy, texture, and grain size distributions, with the propensity for AGG. Additionally, developmental annealing treatments prior to SHT are examined to reduce or eliminate the occurrence of AGG by promoting continuous, or uniform, grain growth

  15. Laser-induced reversion of δ' precipitates in an Al-Li alloy: Study on temperature rise in pulsed laser atom probe.

    Khushaim, Muna; Gemma, Ryota; Al-Kassab, Talaat

    2016-08-01

    The influence of tuning the laser pulse energy during the analyses on the resulting microstructure in a specimen utilizing an ultra-fast laser assisted atom probe was demonstrated by a case study of a binary Al-Li alloy. The decomposition parameters, such as the size, number density, volume fraction, and composition of δ' precipitates, were carefully monitored after each analysis. A simple model was employed to estimate the corresponding specimen temperature for each value of the laser energy. The results indicated that the corresponding temperatures for the laser pulse energy in the range of 10 to 80 pJ are located inside the miscibility gap of the binary Al-Li phase diagram and fall into the metastable equilibrium field. In addition, the corresponding temperature for a laser pulse energy of 100 pJ was in fairly good agreement with reported range of  δ' solvus temperature, suggesting a result of reversion upon heating due to laser pulsing. Microsc. Res. Tech. 79:727-737, 2016. © 2016 Wiley Periodicals, Inc.

  16. 医学技术一级学科建设基础理论研究%Basic Theory Research on Allied Health Professions as A Primary Discipline

    贺庆军; 万学红

    2013-01-01

    Allied Health Professions is a new primary discipline of medicine in China. This paper studies the evolution, disciplinary connotation, research object, academic domains and nature, disciplinary framework, and significance and influence of the construction and development of Allied Health Professions, and points out that the disciplinary construction process still needs to enrich a theoretical system, branch disciplines to be differentiated, high-end talents in lack, and multi-level talent cultivation and degree systems to be constructed.%医学技术是我国医学门类下的新兴一级学科,通过分析医学技术一级学科的发展历程、学科内涵、研究对象、学科性质、学科体系、学科建设的意义和作用等方面,指出该学科发展建设过程中仍存在理论体系尚待丰富、分支学科尚需分化、高端人才缺乏、多层次人才培养和学位体系需要构建等问题.

  17. Soudage par explosion thermique sous charge de cermets poreux à base de TiC-Ni sur substrat en acier-comportement tribologique Welding of porous TiC–Ni based cermets on substrate steel by thermal explosion under load-tribological behaviour

    Lemboub Samia

    2013-11-01

    Full Text Available Dans ce travail, nous nous intéressons à l'élaboration de cermets à base de TiC-Ni par dispersion de particules de carbures, oxydes ou borures dans une matrice de nickel, grâce à la technique de l'explosion thermique sous une charge de 20 MPa. La combustion de mélanges actifs (Ti-C-Ni-An où An = Al2O3, MgO, SiC, TiB2, WC, basée sur la réaction de synthèse de TiC (ΔHf298K = −184 kJ/mole, génère des cermets complexes. Un court maintien sous charge du cermet à 1373 K, après l'explosion thermique, permet son soudage sur un substrat en acier XC55. Les cermets obtenus dans ces conditions demeurent poreux et conservent une porosité de l'ordre de 25–35 %. La densité relative du cermet, sa dureté et son comportement tribologique, dépendront de la nature de l'addition dans les mélanges de départ. Porous TiC-Ni based cermets were obtained by dispersion of carbides, oxides or borides particles in a nickel matrix thanks to the thermal explosion technique realized under a load of 20 MPa. The combustion of active mixtures (Ti-C-Ni-An where An = Al2O3, MgO, SiC, TiB2 or WC based on the titanium carbide reaction synthesis (ΔHf = −184 kJ/mol, generates porous complex cermets. After the thermal explosion, a short maintenance under load at 1373 K of the combustion product, allows at the same time the cermets welding on a carbon steel substrate. The obtained cermets under these conditions preserve a porosity of about 25–35%. The relative density, hardness and tribological behaviour of the complex cermets depend on the additions nature (An in the starting mixtures.

  18. The Mental Vitality @ Work study: design of a randomized controlled trial on the effect of a workers' health surveillance mental module for nurses and allied health professionals

    van Dijk Frank JH

    2011-05-01

    Full Text Available Abstract Background Employees in health care service are at high risk for developing mental health complaints. The effects of mental health complaints on work can have serious consequences for the quality of care provided by these workers. To help health service workers remain healthy and productive, preventive actions are necessary. A Workers' Health Surveillance (WHS mental module may be an effective strategy to monitor and promote good (mental health and work performance. The objective of this paper is to describe the design of a three arm cluster randomized controlled trial on the effectiveness of a WHS mental module for nurses and allied health professionals. Two strategies for this WHS mental module will be compared along with data from a control group. Additionally, the cost effectiveness of the approaches will be evaluated from a societal perspective. Methods The study is designed as a cluster randomized controlled trial consisting of three arms (two intervention groups, 1 control group with randomization at ward level. The study population consists of 86 departments in one Dutch academic medical center with a total of 1731 nurses and allied health professionals. At baseline, after three months and after six months of follow-up, outcomes will be assessed by online questionnaires. In both intervention arms, participants will complete a screening to detect problems in mental health and work functioning and receive feedback on their screening results. In cases of impairments in mental health or work functioning in the first intervention arm, a consultation with an occupational physician will be offered. The second intervention arm offers a choice of self-help e-mental health interventions, which will be tailored based on each individual's mental health state and work functioning. The primary outcomes will be help-seeking behavior and work functioning. Secondary outcomes will be mental health and wellbeing. Furthermore, cost-effectiveness in

  19. Contribution to the study of physico-chemical properties of surfaces modified by laser treatment. Application to the enhancement of localized corrosion resistance of stainless steels; Contribution a l'etude des proprietes physico-chimiques des surfaces modifiees par traitement laser. Application a l'amelioration de la resistance a la corrosion localisee des aciers inoxydables

    Pacquentin, W.

    2011-11-25

    integrite sur des periodes de plus en plus longues. L'objectif de ce travail de these est d'evaluer le potentiel d'un traitement de refusion laser pour ameliorer la resistance a la corrosion d'un acier inoxydable de type 304L; l'utilisation du laser dans le domaine des traitements de surface constituant un procede en pleine evolution a cause des changements recents dans la technologie des lasers. Dans le cadre de ce travail, le choix du laser s'est porte sur un laser nano-impulsionnel a fibre dopee ytterbium dont les caracteristiques permettent la fusion quasiinstantanee sur quelques microns de la surface traitee, immediatement suivie d'une solidification ultra-rapide avec des vitesses de refroidissement pouvant atteindre 1011 K/s. La combinaison de ces processus favorise l'elimination des defauts surfaciques, la formation de phases hors equilibre, la segregation d'elements chimiques et la formation d'une nouvelle couche d'oxyde dont les proprietes sont gouvernees par les parametres laser. Afin de les correler avec la reactivite electrochimique de la surface, l'influence de deux parametres laser sur les proprietes physicochimiques de la surface a ete etudiee: la puissance du laser et le taux de recouvrement des impacts laser. Pour clarifier ces relations, la resistance a la corrosion par piquration des surfaces traitees a ete determinee par des tests electrochimiques. Pour des parametres laser specifiques, le potentiel de piquration d'un acier inoxydable de type 304L augmente de plus de 500 mV traduisant ainsi une meilleure tenue a la corrosion localisee en milieu chlorure. L'interdependance des differents phenomenes resultant du traitement laser a rendu complexe la hierarchisation de leur effet sur la sensibilite de l'alliage teste. Cependant, il a ete montre que la nature de l'oxyde thermique forme au cours de la refusion laser et ses defauts sont du premier ordre pour l'amorcage des

  20. Zoonotic bacteria, antimicrobial use and antimicrobial resistance in ornamental fish: a systematic review of the existing research and survey of aquaculture-allied professionals.

    Weir, M; Rajić, A; Dutil, L; Cernicchiaro, N; Uhland, F C; Mercier, B; Tuševljak, N

    2012-02-01

    Using systematic review methodology, global research reporting the frequency of zoonotic bacterial pathogens, antimicrobial use (AMU) and antimicrobial resistance (AMR) in ornamental fish, and human illness due to exposure to ornamental fish, was examined. A survey was performed to elicit opinions of aquaculture-allied personnel on the frequency of AMU and AMR in ornamental fish. The most commonly reported sporadic human infections were associated with Mycobacterium marinum, while Salmonella Paratyphi B var. Java was implicated in all reported outbreaks. Aeromonas spp. were most frequently investigated (n=10 studies) in 25 studies surveying ornamental fish from various sources. High levels of resistance were reported to amoxicillin, penicillin, tetracycline and oxytetracycline, which was also in agreement with the survey respondents' views. Studies on AMU were not found in our review. Survey respondents reported frequent use of quinolones, followed by tetracyclines, nitrofurans, and aminoglycosides. Recommendations for future surveillance and public education efforts are presented.

  1. Compression Buckling Behavior of Large-Scale Friction Stir Welded and Riveted 2090-T83 Al-Li Alloy Skin-Stiffener Panels

    Hoffman, Eric K.; Hafley, Robert A.; Wagner, John A.; Jegley, Dawn C.; Pecquet, Robert W.; Blum, Celia M.; Arbegast, William J.

    2002-01-01

    To evaluate the potential of friction stir welding (FSW) as a replacement for traditional rivet fastening for launch vehicle dry bay construction, a large-scale friction stir welded 2090-T83 aluminum-lithium (Al-Li) alloy skin-stiffener panel was designed and fabricated by Lockheed-Martin Space Systems Company - Michoud Operations (LMSS) as part of NASA Space Act Agreement (SAA) 446. The friction stir welded panel and a conventional riveted panel were tested to failure in compression at the NASA Langley Research Center (LaRC). The present paper describes the compression test results, stress analysis, and associated failure behavior of these panels. The test results provide useful data to support future optimization of FSW processes and structural design configurations for launch vehicle dry bay structures.

  2. In Defense of the Southern Borders of Russia and Allied Countries (the Russian Foreign Military Bases on the Black Sea-Caspian Arc of Tension

    Vladimir I. Afanasenko

    2016-12-01

    Full Text Available December 25, 2014, President Vladimir Putin approved a new version of the military doctrine of the Russian Federation, which reflects manifested threat to Russia and its allies because the situation in Ukraine, especially in its south-east, in the Donets Basin; the events in Syria, Iraq, and Afghanistan; issues of interaction and cooperation with Abkhazia, South Ossetia, with the CSTO member countries, the BRICS. An important role in the strengthening of the southern borders of the security operate military bases and facilities of the Ministry of Defense of the Russian Federation, located in Transnistria, the Caucasus, Syria and Central Asia. Characteristics of these bases and their value in the Black Sea-Caspian arc of tension given in this article.

  3. Li overlayer formation, oxidation and sputtering characteristics of Al-Li alloys and W/Al-Li composites for fusion applications

    Krauss, A.R. (Argonne National Lab., IL (USA)); DeWald, A.B.; Scott, P.; Savage, H. (Corium Industries, Inc., Atlanta, GA (USA))

    1990-01-01

    The next generation of long pulse fusion devices will impose severe requirements on the properties of plasma-facing materials. In devices such as ITER, a divertor design is being considered, using a divertor plate which would be either tungsten or a low-Z material such as graphite or beryllium. Strongly segregating lithium alloys have been proposed as a means of producing a self-sustaining low-Z overlayer which lowers plasma Z{sub eff} and resists self-sputtering. Aluminum-lithium alloys are among the better-characterized lithium-bearing alloys, and it has been demonstrated that lithium segregates strongly in aluminum. However, aluminum has a relatively low melting point, and for low lithium concentrations, the lithium diffusion rate is too slow to replenish lithium at the rate at which it is eroded by the incoming plasma. It has been suggested previously that the superionic {beta} phase Al-Li alloy (48--54 at. % Li) should have high enough diffusivity to be able to replenish surface lithium, and that incorporation of the {beta}-phase AlLi in a composite with tungsten would provide high temperature strength and melt layer stability, along with significantly better thermal conductivity than pure tungsten. Such a composite has been fabricated, as well as a variation containing titanium as a means of controlling oxidation at grain boundaries. The Li overlayer formation, erosion, and replenishment are characterized for the {beta}-phase LiAl alloy, and W-AlLi and W-Ti-AlLi composites. It is found that if there is no oxide layer to inhibit the Li segregation, Li diffusion is extremely rapid, and an oxygen-free Li overlayer is formed which is stable under continuous ion beam sputtering. 21 refs., 7 figs.

  4. Important, misunderstood, and challenging: a qualitative study of nurses’ and allied health professionals’ perceptions of implementing self-management for patients with COPD

    Young HML

    2015-06-01

    Full Text Available Hannah ML Young,1 Lindsay D Apps,1 Samantha L Harrison,1 Vicki L Johnson-Warrington,1 Nicky Hudson,2 Sally J Singh1,3 1National Institute of Health Research CLAHRC-LNR Pulmonary Rehabilitation Research Group, University Hospitals of Leicester NHS Trust, 2School of Applied Social Sciences, De Montfort University, Leicester, 3Applied Research Centre in Health and Lifestyle Interventions, Coventry University, Coventry, UK Background: In light of the growing burden of COPD, there is increasing focus on the role of self-management for this population. Currently, self-management varies widely. Little is known either about nurses’ and allied health professionals’ (AHPs’ understanding and provision of self-management in clinical practice. This study explores nurses’ and AHPs’ understanding and implementation of supported COPD self-management within routine clinical practice. Materials and methods: Nurses and AHPs participated in face-to-face semistructured interviews to explore their understanding and provision of COPD self-management, as well as their perceptions of the challenges to providing such care. Purposive sampling was used to select participants from a range of professions working within primary, community, and secondary care settings. Three researchers independently analyzed each transcript using a thematic approach. Results: A total of 14 participants were interviewed. Nurses and AHPs viewed self-management as an important aspect of COPD care, but often misunderstood what it involved, leading to variation in practice. A number of challenges to supporting self-management were identified, which related to lack of time, lack of insight regarding training needs, and assumptions regarding patients’ perceived self-management abilities. Conclusion: Nurses and AHPs delivering self-management require clear guidance, training in the use of effective self-management skills, and education that challenges their preconceptions regarding

  5. 2013. aasta keeleteolised peavad pidu : Millised muutused meie keeleruumis rõõmu teevad ja millised mitte nii väga? / Reili Argus, Alli Laande, Teele Jakobson, Kristi Pettai ; intervjueerinud Aili Künstler

    2014-01-01

    Keeletegu 2013 kandidaadid vastavad küsimusele oma tegemiste ja meie keeleruumi olukorra kohta. Kandidaadiks on seatud TLÜ eesti keele professor Reili Argus lapse keelelist arengut toetavate mängude eest, Alli Laande "Mulgi sõnastiku" projektijuhina, lapsi teise Eesti kooli ja teise emakeelega peresse eesti keelt õppima viiva programmi VeniVidiVici looja ja eestvedaja Teele Jakobson ning Vastseliina gümnaasiumi direktor, Võrumaa noorte keelelaagri "Keelevarjud kirjanduses" korraldaja Kristi Pettai

  6. Effect of T6I6 and its modified processes on mechanical properties of novel high strength Al-Li alloy-2A97

    YUAN Zhi-shan; LU Zheng; XIE You-hua; WU Xiu-liang; DAI Sheng-long; LIU Chang-sheng

    2006-01-01

    Based on a novel high strength Al-Cu-Li-X alloy-2A97, the effect of T6I6 and its modified processes on the properties investigated by SEM and tensile test. The results show that when the alloy is heat treated by triple ageing, with secondary low temperature ageing at 80 ℃ after initial ageing at 155 and 150 ℃, and final re-ageing at 135 and 165 ℃, the tensile properties are close to the peak level of aged alloy in T6 temper. The addition of plastic deformation after and prior to secondary ageing favor the T1(Al2CuLi) and δ'(Al3Li) precipitation during final re-ageing at 135 and 165 ℃ corresponding to triple ageing, so the Al-Li alloy displays higher strength for the modified processes of T6I6. The microstructures consist of δ', T1 and θ"/θ' (Al2Cu) phase for single and triple aged alloy, the number density and volume fraction of δ' phase increase for T6I6 and its modified processes correspond to single ageing.

  7. Romance of the three kingdoms: RORgammat allies with HIF1alpha against FoxP3 in regulating T cell metabolism and differentiation.

    Tsun, Andy; Chen, Zuojia; Li, Bin

    2011-10-01

    Regulatory T (Treg) cells play an essential role in immune homeostasis by controlling the function of various immune effector cells, including RAR-related orphan receptor gammat(+) (RORγt(+)) T helper 17 (Th17) cells. Foekhead box P(3) (FoxP(3)) is the master regulator of Treg cell function, while RORγt is the key transcription factor for the induction of the interleukin (IL)-17 family of cytokines during Th17 cell differentiation. FoxP3 can directly interact with and negatively regulate the function of RORγt, to determine the balance between induced Treg (iTreg) and Th17 cell polarization. Two recent independent studies from the Pan and Chi Labs have shown how hypoxia-inducible factor 1 alpha (HIF1α) is able to tip the balance of T cell differentiation toward the Th17 lineage by responding to the local changes in metabolic shift or an increase in proinflammatory mediators in the microenvironment. By allying with HIF1α, RORγt wins the fight against FoxP3 and Treg cell commitment.

  8. The Use of Personal Narrative in Classroom Case Study Analysis to Improve Long-term Knowledge Retention and Cultivate Professional Qualities in Allied Health Students

    Linda M. Young

    2010-11-01

    Full Text Available This study evaluated the use of two different case study formats (clinically-oriented cases versus personally-oriented cases to determine which was most effective in promoting long-term retention of clinically significant microbiology concepts, developing patient empathy, improving comprehension of patient compliance problems, and facilitating student understanding of transcultural health care concerns. The analysis was conducted in multiple sections of three different introductory microbiology classes targeting specific cohorts: nursing students, pharmacy students and other allied health students (pre-med, pre-PA, CLS, etc.. Retention of course content was determined by evaluation of multiple-choice and short answer examinations at least three weeks after completing case studies. Evaluation of patient empathy, understanding of patient compliance issues and transcultural health care concerns were determined via student surveys. The results of the study indicated that personalized cases significantly improved long-term retention of course content. In addition, student responses indicated that personalized case studies were more effective in developing patient empathy and aiding students in understanding issues patients have with complying with treatment recommendations. Finally, personalized case studies were effective tools for introducing students to the challenges of transcultural health care.

  9. The effect of vibrational entropy on the solubility and stability of ordered Al3Li phases in Al-Li alloys

    Mao, Zugang; Seidman, David N.; Wolverton, C.

    2013-10-01

    The solubility and stability of three possible ordered Al3Li structures in Al-Li alloys are studied using first-principles calculations: δ'-Al3Li(L12), δ-Al3Li(DO22), and β-Al3Li(DO3). We find that δ'-Al3Li(L12) is the most stable phase and β-Al3Li(DO3) is energetically unfavorable. The vibrational formation entropy makes a significant contribution to the solubility for all three ordered Al3Li structures and yields a 1.6-fold increase in the calculated solubility of δ'-Al3Li(L12), a 1.8-fold increase for δ-Al3Li(DO22), and a 2.5-fold increase for β-Al3Li(DO3). The solubility of δ'-Al3Li(L12) is greater than those of δ-Al3Li(DO22) and β-Al3Li(DO3), and the δ'-Al3Li(L12) solvus curve is in good agreement with the experimental one.

  10. Localization of plastic deformation in ultra-fine grained Al and Al-Li at temperatures of 4.2-350 K

    Isaev, N. V.; Zabrodin, P. A.; Rusakova, A. V.

    2012-10-01

    This is a study of the plasticity of coarse-grained and ultrafine-grained Al and Al-Li obtained by severe plastic deformation. The temperature dependences of the uniform deformation ɛu(T) before it is localized as necking are examined in the light of the evolution of the density of dislocations and the effect of grain boundaries. The reduction in ɛu with rising temperature is caused by an increase in the rate of annihilation of screw dislocations, which is determined by the Seeger transverse shear stress. The sharp drop in ɛu for ultrafine-grained materials compared to coarse-grained materials is explained by an increase in their yield stress and a lower rate of work hardening owing to the enhanced role of grain boundaries as obstacles, sources, and sinks for dislocations. In this case, the deformation and microhardness distributions along the sample become highly nonuniform, and, as a measure of plasticity, ɛu no longer characterizes the high local plasticity of these materials.

  11. Knowledge of zoonoses among those affiliated with the ontario Swine industry: a questionnaire administered to selected producers, allied personnel, and veterinarians.

    Marvin, Dawn M; Dewey, Catherine E; Rajić, Andrijana; Poljak, Zvonimir; Young, Beth

    2010-02-01

    Zoonoses are diseases caused by infectious agents that are transmitted from animals to humans. Some zoonoses have been associated with the pig and pork industry. To ensure the safety of pigs and pork and to improve public health it is essential to understand the level of knowledge of those affiliated with the swine industry. The purpose of our study was to assess the knowledge of and attitude toward zoonotic and other microbial hazards among targeted groups of stakeholders associated with the Ontario swine industry. A postal questionnaire was sent to 409 individuals representing producers, veterinarians, and allied industry personnel. The questionnaire included seven dichotomous and Likert-scale type questions on microbial hazards, addressing topics on familiarity, concern, presence, antimicrobial resistance, and knowledge transfer. The overall response rate was 53% (218/409). More respondents were concerned about the zoonotic potential of Salmonella spp. (53-94%) and swine influenza virus (64-75%) than other hazards. The group of veterinarians were more familiar (>89%) with all microbial hazards than other occupation groups. Additionally, antimicrobial resistance was reported as a problem by more (60%) veterinarians than producers (20%). Educational efforts should focus on preferred methods of knowledge transfer (e.g., producer meetings, magazine) to update swine industry personnel about zoonoses in an attempt to improve food safety and public health.

  12. 安徽的虫草及其相关真菌I.%THE GENUS CORDYCEPS AND I0TS ALLIES FROM ANHUI I.

    李春如; 樊美珍; 黄勃; 王四宝; 李增智

    2002-01-01

    报道疣孢虫草Cordyceps phymatospora为新种;球孢虫草C. bassiana 及其无性型Beauveria bassiana, 长座虫草C. longissima 及其无性型 Hirsutella longissima, 台湾虫草C. formosana 及其无性型 Hirsutella sp., 拟细虫草C. gracilioides和丝虫草C. filiformis 等19种虫草及其部分相关真菌.模式标本保存在安徽农业大学虫生菌研究中心(RCEFAAU).%19 species of Cordyceps and its allies from some nature preserves in Anhui Province, southeastern China are reported. They are Cordyceps phymatospora sp. nov., C. bassiana and its anamorph Beauveria bassiana, C. longissima and its anamorph Hirsutella longissima, C. formosana and its anamorph Hirsutella sp., C. gracilioides, C. filiformis and so on. Specimens examined are deposited in Research Center on Entomogenous Fungi, Anhui Agricultural University (RCEFAAU).

  13. Behaviour and Analysis of Mechanically Fastened Joints in Composite Structures

    1988-03-01

    faiblement alli6 25CD4, lea via utilis6es devant dana ce cas 6tre elles-m~mes prot6gfies par vernis. Tous ces dcrous mont A chazubrage profond af in de...FOR IVAU52C DOUBLE-LAP JOINT 21-12 SPECIMN No0. Is" -16 0 5It 1 -16RE UREII 32 4.1 7 6 7t 1 Ii It31 ilk CYCLE I t6 IŚ LEW 6.61 ;EQ66 46.66 WEB WEB

  14. Antiresorptive agent-related osteonecrosis of the jaw: Position Paper 2017 of the Japanese Allied Committee on Osteonecrosis of the Jaw.

    Yoneda, Toshiyuki; Hagino, Hiroshi; Sugimoto, Toshitsugu; Ohta, Hiroaki; Takahashi, Shunji; Soen, Satoshi; Taguchi, Akira; Nagata, Toshihiko; Urade, Masahiro; Shibahara, Takahiko; Toyosawa, Satoru

    2017-01-01

    Antiresorptive agent-related osteonecrosis of the jaw (ARONJ) is an intractable, though rare, complication in cancer patients with bone metastases and patients with osteoporosis who are treated with antiresorptive agents, including bisphosphonates and denosumab. Despite the more than 10 years that have passed since the first cases of bisphosphonate-related osteonecrosis of the jaw (BRONJ) were reported, our understanding of the epidemiology and pathophysiology of ARONJ remains limited, and data supported by evidence-based medicine are still sparse. However, the diagnosis and staging of ARONJ, identification of risk factors, and development of preventive and therapeutic approaches have advanced significantly over the past decade. The Position Paper 2017 is an updated version of the Position Paper 2010 of the Japanese Allied Committee on Osteonecrosis of the Jaw, which now comprises six Japanese academic societies. The Position Paper 2017 describes a new diagnostic definition for ARONJ, as proposed by the American Association of Oral and Maxillofacial Surgeons (AAOMS), summarizes our current understanding of the pathophysiology of ARONJ based on a literature search, and suggests methods for physicians and dentists/oral surgeons to manage the disease. In addition, the appropriateness of discontinuing antiresorptive medications (drug holiday) before, during, and after invasive dental treatments is discussed extensively. More importantly, the manuscript also proposes, for the first time, the importance of interactive communication and cooperation between physicians and dentists/oral surgeons for the successful treatment of ARONJ. The Position Paper 2017 is intended to serve as a guide for improving the management of ARONJ patients in Japan.

  15. 安徽的虫草及其相关真菌Ⅱ%The genus Cordyceps and its allies from Anhui Ⅱ

    仇飞; 张琪; 李春如; Spatafora Joey; 樊美珍; 李增智

    2012-01-01

    In this paper, 20 species of Cordyceps and its allies from some nature preserves in Anhui Province were reported as follows: Cordyceps brongniartii and its anamorph Beauveria brongniartii, C. cylindrica and its anamorph Nomuraea atypicola, Metacordyceps guniujiangensis and its anamorph Metarhizium aff. cylindro-sporum, Ophiocordyceps heteropoda var. langyashanensis and its anamorph Hirsutella heteropoda, O. mel-olonthae, O. odonatae, O. gryllotalpae, C, kusanagiensis and so on. Among them, O. melolonthae is a new record to China mainland and a minor error in original description of O. odonatae was revised. Specimens examined are deposited in Research Center on Entomogenous Fungi, Anhui Agricultural University (RCEFAAU).%对安徽省分布的布氏虫草Cordyceps brongniartii及其无性型布氏白僵菌Beauveria brongniartii、柱形虫草Cordyceps cylindrica及其无性型紫色野村菌Nomuraea atypicola、牯牛降异虫草Metacordyceps guniujiangensis及其无性型柱孢绿僵菌近似种Metarhizium aff.cylindrosporum、根足线虫草琅琊山变种Ophiocordyceps heteropoda var.langyashanensis及其无性型根足被毛孢Hirsutella heteropoda、腮金龟线虫草O.melolonthae、蜻蜓线虫草O.odonatae、蝼蛄线虫草(朝鲜虫草)O.gryllotalpae和草剃虫草Cordyceps kusanagiensis等20个虫草及其相关真菌种类重新整理发表,其中腮金龟虫草为中国大陆首次报道;同时,纠正了蜻蜓线虫草原始描述中的错误.鉴定标本保存在安徽农业大学虫生真菌研究中心(RCEFAAU).

  16. Coarsening kinetics, thermodynamic properties, and interfacial characteristics of δ' precipitates in Al-Li alloys taking into account the Gibbs-Thomson effect

    Tsao, C.-S.; Chen, C.-Y.; Huang, J.-Y.

    2004-11-01

    The structure factor model of small-angle x-ray scattering (SAXS) analysis is validated herein by transmission electron microscopy (TEM) result regarding the volume fraction and size of δ' precipitates. The kinetic behaviors of the number density and volume fraction of δ' precipitates in Al-Li alloys during the coarsening stage are quantitatively investigated by SAXS. The results indicate that the conventional kinetic law must be replaced by a more general equation that incorporates the Gibbs-Thomson effect and the time-dependence of the volume fraction during Ostwald ripening. This work also proposes new methods that combine the Gibbs-Thomson effect and the traditional SAXS equation to resolve more reliably and model independently the interfacial energy, the concentration of solute Li in the α matrix in equilibrium with δ' particles of a nanoscale radius Cαr , the equilibrium solubility of the α phase Ceα and the equilibrium concentration of δ' particles. The Gibbs-Thomson effect considers the effects of the interfacial energy and particle size on the equilibrium concentration. This effect quantitatively clarifies that the Cαr value is size-dependent and is related to the Ceα value and the interfacial energy. The traditional SAXS equation determines the Li concentrations in the δ' particles and the matrix from the measured scattering contrast. The traditionally determined solubility is in fact the Cαr value and is mistakenly regarded as the equilibrium concentration Ceα (corresponding to the radius is infinite). These results are compared to other results obtained by SAXS, TEM, and calculation. The time evolution of the transition interfacial layers between δ' particles and the matrix is extensively investigated using SAXS.

  17. A survey of adulterants used to cut cocaine in samples seized in the Espírito Santo State by GC-MS allied to chemometric tools.

    de Souza, Lindamara M; Rodrigues, Rayza R T; Santos, Heloá; Costa, Helber B; Merlo, Bianca B; Filgueiras, Paulo R; Poppi, Ronei J; Vaz, Boniek G; Romão, Wanderson

    2016-03-01

    Cocaine is a stimulant drug of the central nervous system (CNS) extracted from the leaves of Erytroxylum coca. It is defined as a tropane alkaloid containing 1R-(exo,exo)-3-(benzoyloxy)-8-methyl-8-azabicyclo[3.2.1]octane-2-carboxylic acid methyl esther. However, despite its defined composition, a wide variety of chemical additives are present in cocaine found in the illicit market, such as benzocaine, lidocaine, caffeine, procaine and phenacetin. In this work, 512 cocaine samples seized by the Civil Police of Espirito Santo state (PC-ES, Brazil) were analyzed by gas chromatography mass spectrometry (GC-MS) allied to principal component analysis (PCA) in order to classify the samples as a function of seizure year (2008, 2009, 2010, 2011 and 2012) and location (metropolitan, north, south and central). The cocaine content (wt.%) and its adulterants were also estimated. Analyzing the samples seized between 2008 and 2011, three sample sets are clearly grouped according to the degree of adulteration with caffeine and lidocaine: 100-50 wt.% of cocaine; 50-20 wt.% of cocaine; and 20-80 wt.% of lidocaine and 60-80 wt.% of caffeine, simultaneously. The last group is formed by samples seized between 2008 and 2009, which proves the higher degree of adulteration during this period. In 2012, higher cocaine content was observed for the 191 analyzed samples than in samples from previous years. The PCA data also suggests that the metropolitan region samples had a higher degree of adulteration than the state countryside samples.

  18. The Enhanced Effect of Optical Emission from Laser Induced Breakdown Spectroscopy of an Al-Li Alloy in the Presence of Magnetic Field Confinement

    Liu, Ping; Hai, Ran; Wu, Ding; Xiao, Qingmei; Sun, Liying; Ding, Hongbin

    2015-08-01

    In this paper, the influence of magnetic field strength on laser-induced breakdown spectroscopy (LIBS) has been investigated for various pressures. The plasma plume was produced by employing Q-switch Nd:YAG laser ablation of an Al-Li alloy operating at a 1064 nm wavelength. The results indicated that the LIBS intensity of the Al and Li emission lines is boosted with an increase of magnetic strength. Typically, the intensity of the Al I and Li I spectral emissions can be magnified by 1.5-3 times in a steady magnetic field of 1.1 T compared with the field-free case. Also, in this investigation we recorded time-resolved images of the laser-produced plume by employing a fast ICCD camera. The results show that the luminance of the plasma is enhanced and the time of persistence is increased significantly, and the plasma plume splits into two lobes in the presence of a magnetic field. The probable reason for the enhancement is the magnetic confinement effect which increases the number density of excited atoms and the population of species in a high energy state. In addition, the electron temperature and density are also augmented by the magnetic field compared to the field-free case. supported by the National Magnetic Confinement Fusion Science Program of China (No. 2013GB109005) and National Natural Science Foundation of China (No. 11175035), Chinesisch-Deutsches Forschungs Project (GZ768), the Fundamental Research Funds for the Central Universities, China (Nos. DUT12ZD(G)01, (DUT14ZD(G)04), MMLab Research Project (DP1051208)

  19. Key to steel. 22. ed.; Stahlschluessel. La cle des aciers

    Wegst, C.; Wegst, M.

    2010-07-01

    This trilingual ''Key to Steel'' in German, French and English is a cross reference book for decoding or deciphering steel designations and finding equivalent materials worldwide. This book contains the following informations: 1. Standard number arrangement in numerical order. 2. Who supplies which steel. 3. Table of suppliers. 4. Table of shape and condition of product. 5. Index of brand names in alphabetical order (Germany and foreign countries). 6. Categories containing several type of steels and welding filler materials. 7. Detailed compositions and cross referenced standards and designations. 8. Standards and designations from 24 countries.

  20. Påvirkningen fra et brætspil - En trianguleret analyse af Axis & Allies påvirkning af dets spilleres holdninger til 2. verdenskrig og International Politik.

    Præstegaard, Mads Christian

    2015-01-01

    This master’s thesis is a product of 6½ years of study at Roskilde University, Denmark. The thesis researches popular culture within the subjects of History and Politics & Administration through a board game called Axis & Allies, made in the USA in the late 80’s. The master thesis’ main thesis is whether this board game in particular, can inflict changes in opinion regarding the players’ view of the history of the WWII and International Relations as a whole. The game itself is described as a ...

  1. Desarrollo psicomotor y su relación con el estado nutricional en los niños de 6 a 24 meses del proyecto Ally Micuy De ADRA en Huari, Ancash, 2009

    Beltrán Huayta, Jeaneth

    2015-01-01

    Objetivo: El objetivo del presente trabajo de investigación fue determinar la relación que existe entre el desarrollo psicomotor y el estado nutricional en los niños de 6 a 24 meses del Proyecto Ally Micuy de ADRA en Huari, Ancash; 2009. Metodología: La metodología corresponde al diseño no experimental, tipo descriptivo correlacional y corte transversal. La población de estudio estuvo conformada por 170 niños de 6 a 24 meses del distrito de Huari, de los cuales se seleccionó a 80 niños a trav...

  2. An Expressive Bodily Movement Repertoire for Marimba Performance, Revealed through Observers' Laban Effort-Shape Analyses, and Allied Musical Features: Two Case Studies

    Broughton, Mary C.; Davidson, Jane W.

    2016-01-01

    Musicians' expressive bodily movements can influence observers' perception of performance. Furthermore, individual differences in observers' music and motor expertise can shape how they perceive and respond to music performance. However, few studies have investigated the bodily movements that different observers of music performance perceive as expressive, in order to understand how they might relate to the music being produced, and the particular instrument type. In this paper, we focus on marimba performance through two case studies—one solo and one collaborative context. This study aims to investigate the existence of a core repertoire of marimba performance expressive bodily movements, identify key music-related features associated with the core repertoire, and explore how observers' perception of expressive bodily movements might vary according to individual differences in their music and motor expertise. Of the six professional musicians who observed and analyzed the marimba performances, three were percussionists and experienced marimba players. Following training, observers implemented the Laban effort-shape movement analysis system to analyze marimba players' bodily movements that they perceived as expressive in audio-visual recordings of performance. Observations that were agreed by all participants as being the same type of action at the same location in the performance recording were examined in each case study, then across the two studies. A small repertoire of bodily movements emerged that the observers perceived as being expressive. Movements were primarily allied to elements of the music structure, technique, and expressive interpretation, however, these elements appeared to be interactive. A type of body sway movement and more localized sound generating actions were perceived as expressive. These movements co-occurred and also appeared separately. Individual participant data revealed slightly more variety in the types and locations of actions

  3. An Expressive Bodily Movement Repertoire for Marimba Performance, Revealed through Observers' Laban Effort-Shape Analyses, and Allied Musical Features: Two Case Studies.

    Broughton, Mary C; Davidson, Jane W

    2016-01-01

    Musicians' expressive bodily movements can influence observers' perception of performance. Furthermore, individual differences in observers' music and motor expertise can shape how they perceive and respond to music performance. However, few studies have investigated the bodily movements that different observers of music performance perceive as expressive, in order to understand how they might relate to the music being produced, and the particular instrument type. In this paper, we focus on marimba performance through two case studies-one solo and one collaborative context. This study aims to investigate the existence of a core repertoire of marimba performance expressive bodily movements, identify key music-related features associated with the core repertoire, and explore how observers' perception of expressive bodily movements might vary according to individual differences in their music and motor expertise. Of the six professional musicians who observed and analyzed the marimba performances, three were percussionists and experienced marimba players. Following training, observers implemented the Laban effort-shape movement analysis system to analyze marimba players' bodily movements that they perceived as expressive in audio-visual recordings of performance. Observations that were agreed by all participants as being the same type of action at the same location in the performance recording were examined in each case study, then across the two studies. A small repertoire of bodily movements emerged that the observers perceived as being expressive. Movements were primarily allied to elements of the music structure, technique, and expressive interpretation, however, these elements appeared to be interactive. A type of body sway movement and more localized sound generating actions were perceived as expressive. These movements co-occurred and also appeared separately. Individual participant data revealed slightly more variety in the types and locations of actions

  4. An expressive bodily movement repertoire for marimba performance, revealed through observers’ Laban effort-shape analyses, and allied musical features: two case studies

    Mary C Broughton

    2016-08-01

    Full Text Available Musicians’ expressive bodily movements can influence observers’ perception of performance. Furthermore, individual differences in observers’ music and motor expertise can shape how they perceive and respond to music performance. However, few studies have investigated the bodily movements that different observers of music performance perceive as expressive, in order to understand how they might relate to the music being produced, and the particular instrument type. In this paper, we focus on marimba performance through two case studies – one solo and one collaborative context. This study aims to investigate the existence of a core repertoire of marimba performance expressive bodily movements, identify key music-related features associated with the core repertoire, and explore how observers’ perception of expressive bodily movements might vary according to individual differences in their music and motor expertise. Of the six professional musicians who observed and analyzed the marimba performances, three were percussionists and experienced marimba players. Following training, observers implemented the Laban effort-shape movement analysis system to analyze marimba players’ bodily movements that they perceived as expressive in audio-visual recordings of performance. Observations that were agreed by all participants as being the same type of action at the same location in the performance recording were examined in each case study, then across the two studies. A small repertoire of bodily movements emerged that the observers perceived as being expressive. Movements were primarily allied to elements of the music structure, technique, and expressive interpretation, however, these elements appeared to be interactive. A type of body sway movement and more localized sound generating actions were perceived as expressive. These movements co-occurred and also appeared separately. Individual participant data revealed slightly more variety in the

  5. Centrifugal pumps and allied machinery

    Anderson, HH

    1994-01-01

    This book will be of vital interest to all engineers and designers concerned with centrifugal pumps and turbines. Including statistical information derived from 20000 pumps and 700 turbines with capacities of 5gpm to 5000000gpm, this book offers the widest range and scope of information currently available. Statistical analyses suggest practical methods of increasing pump performance and provide valuable data for new design aspects.

  6. Arms or Allies? / Imants Liegis

    Liegis, Imants

    2011-01-01

    Läti endine kaitseminister ei ole rahul sellega, et Euroopa Liitu ja NATO-sse kuuluv Prantsusmaa müüb Mistral-tüüpi laevu Venemaale ja leiab, et selliste otsuste tegemisel võiks arvestada teiste liikmesriikidega

  7. Citizen Participation: Antagonists or Allies

    Cunningham, William G.

    1976-01-01

    If participation does not include an openness to the issues that are of real concern to the community and an opportunity to influence policy relating to those issues, it becomes an empty public relations gesture fostering apathy, disinterest, resistance, or counter-organization. (MB)

  8. Make your enemies your allies.

    Uzzi, Brian; Dunlap, Shannon

    2012-05-01

    Rivalries in the workplace can be destructive to both personal career growth and group success. Many attempts to reverse rivalries fail because of the complex way emotion and reason operate in the building of trust. Using a method called the 3Rs, an effective leader can turn a rival into a collaborator, setting the stage for a healthy work life while driving fresh thinking within an organization. Step 1 of the method is redirection, shifting a rival's negative emotions away from the adversarial relationship. This creates an opening for Step 2, reciprocity, through which a relationship can be established. Here, the essential principle is to give before you ask--offering a rival something of clear benefit and "priming the pump" for a future return that requires little effort on the rival's part. Step 3, rationality, sets expectations of the new relationship so that efforts made using the previous steps don't come off as disingenuous. A rival is encouraged to see collaborative opportunities from a reasoned standpoint. A key advantage of the 3Rs is that the method can work to reverse all kinds of rivalries, including those with subordinates, peers, and superiors.

  9. Aerospace Avionics and Allied Technologies

    Jitendra R. Raol

    2011-07-01

    Full Text Available Avionics is a very crucial and important technology, not only for civil/military aircraft but also for missiles, spacecraft, micro air vehicles (MAVs and unmanned aerial vehicles (UAVs. Even for ground-based vehicles and underwater vehicles (UWVs, avionics is a very important segment of their successful operation and mission accomplishment. The advances in many related and supporting technologies, especially digital electronics, embedded systems, embedded algorithms/software, mobile technology, sensors and instrumentation, computer (network-communication, and realtime operations and simulation, have given a great impetus to the field of avionics. Here, for the sake of encompassing many other applications as mentioned above, the term is used in an expanded sense: Aerospace Avionics (AA, although it is popularly known as Aviation Electronics (or Avionics. However, use of this technology is not limited to aircraft, and hence, we  can incorporate all the three types-ground, land, and underwater vehicles-under the term avionics.Defence Science Journal, 2011, 61(4, pp.287-288, DOI:http://dx.doi.org/10.14429/dsj.61.1122

  10. The Dilemma of an Ally.

    1987-03-01

    role in crushing the "Huk" movement in Central Luzon during the 1950s. Using P-51 Mustangs, they bombed and strafed the dissidents hideouts in... Central Luzaon which finally broke the bone of the rebels. In a similar fashion, the Air Force saw action again in the early 70s at the height of rebel...be vtry effective against motorized boats used by the rebels plying river routes. This earned them the dreaded title of " banca busters" ( banca is the

  11. Having Allies Makes a Difference

    Pardini, Priscilla

    2013-01-01

    Milwaukee's gay-friendly Alliance High School was conceived to be a welcoming and confirming school for kids who have been teased and bullied and had their interests marginalized in traditional schools. The result is a group of teens who feel they have found a safe place as they explore who they will be and how they will live the rest of their…

  12. Trojan Horses or Local Allies

    Müllner, Jakob; Klopf, Patricia; Nell, Phillip Christopher

    . On the negative side, we argue that these characteristics of HCNs can potentially be used to the harm of a foreign MNC. We analyze how formal and informal institutions affect the trade-off between positive effects and the potential costs associated with HCN managers (“Local allies” vs. “Trojan horses”). We find...

  13. Mécanismes de dégradation et moyens de protection des câbles du génie civil : Exemple des câbles de haubanage

    Dieng, Lamine; Perier, Virginie; Gaillet, Laurent; TESSIER, Christian

    2009-01-01

    Les câbles actuellement utilisés en génie civil, notamment sur les ponts à haubans ou suspendus, sont constitués de fils d'acier cylindriques de diamètre compris entre 3 et 7 mm. Ils sont en acier non ou peu allié de composition proche de l'eutectoïde et sont obtenus par tréfilage à froid. Ils ont une résistance à la traction élevée (supérieure à 1900 MPa) et une faible ductilité. De par leur constitution, les câbles présentent une bonne robustesse en traction et une faible rigidité à la flex...

  14. Effect of the composition of Al-Li alloys on the quantitative relation between the δ'(Al3Li), S1(Al2MgLi), and T1(Al2CuLi) phases

    Betsofen, S. Ya.; Antipov, V. V.; Grushin, I. A.; Knyazev, M. I.; Khokhlatova, L. B.; Alekseev, A. A.

    2015-01-01

    Al-Li alloys are considered. A quantitative approach to the determination of the ratio of the fractions of the binary and ternary intermetallic phases in Al-Mg(Cu)-Li alloys is developed on the basis of chemical and phase composition balance equations and the experimentally measured lattice parameter of the α solid solution. The ratio of the fractions of the δ'(Al3Li) and S1(T1) phases in Al-Mg(Cu)-Li alloys is shown to be determined by the ratio of the mole fractions of Li and Mg(Cu). Equations are proposed for calculating the weight fractions of the S1(Al2MgLi), T1(Al2CuLi) and δ'(Al3Li) phases in domestic and foreign Al-Mg-Li alloys 1420, 1424, 5090 and Al-Cu-Li alloys 1440, 1460, 1461, 1441, 1469, 2090, 2095, 8090, and Weldalite 049.

  15. Evolución de la fricción interna del material compuesto de matriz Al-Li 8090 reforzado con partículas de SiC

    Gutiérrez-Urrutia, I.

    2001-04-01

    Full Text Available The present study has been undertaken to investigate the mechanism of thermal stress relief at the range of temperatures below room temperature for the metal matrix composite Al-Li 8090/SiC. For this aim the experimental technique of internal friction has been used which has been showed up very effective. Several thermal cycles from 453 K to 100 K were used in order to measure the internal friction as well as the elastic modulus of the material concluding that thermal stresses are relaxed by microplastic deformation around the reinforcements. It has been also related the variation in the elastic modulus with the different levels of precipitation.

    El presente trabajo investiga el mecanismo de relajación de tensiones térmicas a temperaturas por debajo de la de ambiente en el material compuesto Al-Li 8090/SiC. Para ello se ha empleado la técnica experimental de fricción interna que se ha mostrado la más eficaz para tal fin. Aplicando diferentes ciclos térmicos de 453 K a 100 K se midió tanto la fricción interna como el módulo elástico del material concluyendo que el mecanismo de relajación de tensiones térmicas es el de microdeformación plástica alrededor del reforzamiento. También se relaciona la variación del módulo elástico con los diferentes estadios de precipitación.

  16. Evaluation on the effect of allied health intervention on the elderly in nursing home%养老机构实施团队健康干预的效果评价

    蒲艺文; 沈军

    2014-01-01

    目的:探讨实施团队健康干预在提升养老机构老人生活质量的作用.方法:运用方便抽样对2所养老机构82位老人实施团队健康干预,分别在老人入住1周内与入住3个月后运用SF-36健康调查问卷(the Mos 36-item short form health survey,SF-36)和微型营养评估问卷(mini nutritional assessment,MNA)对养老机构老人进行生活质量评价.结果:养老机构老人实施3个月团队健康干预后老人SF-36总均分和个维度得分显著提高,较入住1周内比较,差异有统计学意义(P=0.000).MNA得分差异比较无统计学意义(P>0.05),但MNA得分与SF-36总均值和其8个维度呈正相关性,其干预后相关系数分别为:总均分r5=0.684、生理机能(physical functioning,PF)rs=0.643、生理职能(role physical,RP)rs=0.439、躯体疼痛(bodily pain,BP)rs=0.551、一般健康状况(general health,GH)rs=0.602、精力(vitality,VT)rs=0.532、社会功能(social functioning,SF)rs=0.478、情感职能(role-emotional,RE)rs=0.333、精神健康(mental health,MH)rs=0.396.结论:对养老机构老人实施团队健康干预,能有效提高老人生活质量.%Objective:To explore the role of allied health intervention in improving the life quality of the elderly in nursing home.Methods:The 82 elderly were selected through convenience sampling from two nursing homes and allied health intervention was implemented.The Mos 36-item short form health survey(SF-36) and the mini nutritional assessment(MNA) were applied to evaluate the life quality at one week and three months after the check in.Results:After three months,the total mean score and eight dimensional scores of SF-36 were improved significantly and there were statistical differences in the scores of the SF-36(P=0.000) but no statistical difference in the scores of MNA between one week and three months(P>0.05).There were positive correlation between the total mean score and eight dimensional scores of SF-36 and MNA score(the total mean

  17. 时效处理对Al-Li二元合金力学性能的影响%Influence of aging treatment on mechanical properties of Al-Li binary alloys

    梁宇; 王赫男; 刘春忠

    2015-01-01

    Al-1Li,Al-2Li and Al-3Li binary alloys were prepared by using vacuum induction melting fur-nace. The as-cast microstructure was observed with an optical microscopy and the phase transition tempera-tures of the three alloys were determined by differential scanning calorimetry( DSC). After solution and ag-ing treatment,the hardness of the three alloy samples were measured by using Vickers hardness tester. The Al-Li alloy samples were selected with different aging time and tensile test was conducted. The fracture mor-phologies of the samples were observed by scanning electron microscope( SEM ). The results indicate that both Al-2 Li alloy and Al-3 Li alloy have aging hardening and strengthening effects but Al-1 Li alloy does not. The maximum tensile strength of Al-1Li,Al-2Li and Al-3Li binary alloys are 63MPa,162MPa and 298MPa respectively. The tensile strength is increased and the toughness of Al-Li alloys is decreased with the growth of Li element. The fracture mechanism of alloys is changed to the brittle fracture from the ductile fracture due to Li addition.%采用真空感应熔炼炉制备Al-1Li、Al-2Li和Al-3Li二元合金,用金相显微镜观察其铸态组织,并用DSC确定其相转变温度。对3种合金进行固溶和时效处理,用维氏硬度计测量试样的硬度。选择具有不同时效时间的Al-Li合金进行拉伸实验,并用SEM观察断口形貌。结果表明:除Al-1Li合金外,Al-2Li和Al-3Li合金具有明显时效硬化和强化效应;Al-1Li、Al-2Li和Al-3Li合金的最大抗拉强度分别为63 MPa、162 MPa和298 MPa;合金元素Li在提高Al-Li合金强度的同时,导致其韧性降低,断裂由韧性向脆性转变。

  18. Anisakis infection in allis shad, Alosa alosa (Linnaeus, 1758), and twaite shad, Alosa fallax (Lacépède, 1803), from Western Iberian Peninsula Rivers: zoonotic and ecological implications.

    Bao, M; Mota, M; Nachón, D J; Antunes, C; Cobo, F; Garci, M E; Pierce, G J; Pascual, S

    2015-06-01

    Spawning individuals of allis shad, Alosa alosa (Linnaeus, 1758), and twaite shad, Alosa fallax (Lacépède, 1803), were sampled from three rivers on the Atlantic coast of the Iberian Peninsula (Ulla, Minho, Mondego) during 2008 to 2013 to assess the presence of the zoonotic marine parasite Anisakis spp. larvae. The results revealed that both shad species were infected by third-larval stage Anisakis simplex s.s. and Anisakis pegreffii. The latter is reported in mixed infections in both shad species of Western Iberian Peninsula for the first time. In A. alosa, the prevalence of Anisakis infection can reach 100%, while in A. fallax, prevalence was up to 83%. Infected individuals of the former species also often contain much higher number of parasites in theirs internal organs and flesh: from 1 to 1138 Anisakis spp. larvae as compared to 1 to 121 larvae, respectively. In general, numbers of A. pegreffii were higher than those of A. simplex s.s. Our results suggest that in the marine environment of the Western Iberian Peninsula, both anadromous shad species act as paratenic hosts for A. simplex s.s. and A. pegreffii, thus widening the distribution of the infective nematode larvae from the marine to the freshwater ecosystem. This finding is of great epidemiological relevance for wildlife managers and consumers, considering the zoonotic and gastroallergic threats posed of these parasites.

  19. 铝锂合金中原子簇聚和有序化的计算机模拟研究%Investigations on Ordering and Atom Clustering in Al-Li Alloy by Computer Simulation

    李晓玲; 陈铮; 王永欣; 胡明娟

    2006-01-01

    通过计算机模拟对铝锂合金时效过程中的有序化和原子簇聚进行了研究.长程序参数和成分偏离序参数通过锂原子格点占位几率计算得出.结果表明:随合金成分由相图上的亚稳区向失稳区转变,有序化与原子簇聚过程相比逐渐加快,而相变孕育期逐渐缩短.%Investigations on the ordering and atom clustering in aged binary Al-Li alloy have been carried out by computer simulation. The long range order parameter (lro.) and composition deviation order parameter were calculated from single-site occupation probabilities of Li atom. The results show that as the composition of the alloy increases from metastable region to instable region in the phase diagram ordering occurs faster than atom clustering gradually and the incubation period of the phase transformation is shortened.

  20. From vision to reality--managing change in the provision of library and information services to nurses, midwives, health visitors and PAMs: (professions allied to medicine) a case study of the North Thames experience with the Inner London Consortium.

    Godbolt, S; Williamson, J; Wilson, A

    1997-06-01

    One of the North Thames' pioneering consortia, the Inner London Consortium (ILC) is a complex body which includes NHS Trusts with teaching hospital university connections, community-based Trusts and general hospital acute Trusts. Within the consortium there are 12,000 trained nurses, midwives, health visitors and other professional staff working in the professions allied to medicine (PAMs), all of whom require access to and provision of appropriate library information services. In 1994, taking into account experiences elsewhere in the Region and nationally, it became clear that library issues were complex and would become acute with the move of nursing libraries from ILC Trust sites over a very short timescale. A report on the issues commissioned by the Consortium recommended that a library project, which built on existing NHS Trust PGMDE funded library resources and moved these to a multidisciplinary base to serve the consortium membership, be implemented. The objective of providing access to library information services for nurses and PAMs was achieved. Successes that emerged from the implementation included: The registration in Trust libraries of almost 12 000 new members within the initial 6-month monitoring period. The development of service level agreements and standards for the delivery of services to these new user groups. This paper describes the processes behind these significant and complex changes.

  1. Covert Operation ``Sun God'' - History of German Solar Research in the Third Reich and Under Allied Occupation (German Title: Kommandosache ``Sonnengott'' - Geschichte der deutschen Sonnenforschung im Dritten Reich und unter alliierter Besatzung)

    Seiler, Michael P.

    Between 1939 and 1945 the Luftwaffe of the Third Reich invested large sums in solar research and the establishment of a chain of solar observatories under the code word “Sun God”. Observations of the different phenomena of solar activity were intended to allow a dependable daily prediction of the best frequency bands for long-range military radio. For the development of these research activities the Luftwaffe used a young astrophysicist, who - being the son of a well-known leftist publisher of the Weimar Republic - did appear not well suited to perform “war decisive research” for the Nazi regime: Karl-Otto Kiepenheuer (1910-1975). Circumventing the usual academic tenure, Hitler's war turned the barely thirty-year-old and up to then rather unsuccessful Kiepenheuer into an influential director of a research institution, which he was to remain for the next three decades as well. This book recounts the history of German solar research in the period 1939-1949, her entanglement with the crimes of the Nazi regime as well as her use by the Western Allies until the founding of the German Federal Republic.

  2. Résultants de polynômes de Ore et Cryptosystèmes de McEliece sur des Codes Rang faiblement structurés

    Murat, Gaétan; Murat, Gaetan

    2014-01-01

    The most commonly used encryption techniques in cryptography are based on problems in number theory. Despite their efficiency, they are vulnerable to post-quantum cryptographic attack. Therefore it is relevant to study other types of cryptosystems. In this work we study error-corrector codes based cryptosystmems, introduced by McEliece in 1978 ; being based on hard problems in coding theory, these cryptosystems do not have this weakness. However these cryptosystems are almost not used in prac...

  3. NSE和S-100在先天性巨结肠及其同源病诊断中的应用%Application of NSE and S-100 in diagnosing Hirschsprung′s disease and its allied disorders

    姜磊; 刘弋

    2012-01-01

    目的 探讨神经元和神经胶质细胞标志物神经元特异性烯醇化酶(neuron-specific enolase,NSE) 与S-100(soluble-protein 100,S-100) 在先天性巨结肠(Hirschsprung′s disease,HD)及其同源病(Hirschsprung′s disease allied disorders,HAD)诊断中的作用.方法 对45例临床诊断为HD的手术切除标本进行常规HE染色,观察肠神经元及神经节细胞形态和数量的变化,并选择成人结肠肿瘤标本切缘正常组织作对照组进行比较.对HE染色光镜下可疑HD(即HAD)的21例标本进行NSE、S-100蛋白免疫组化测定.结果 对照组结肠壁神经丛中可见染色深浅不一的NSE免疫反应性神经节细胞,神经纤维均匀分布在肠壁各层;神经节细胞胞体对S-100蛋白则表现为细胞状"空白区".HAD组结肠壁分化异常,狭窄段结肠壁神经丛内NSE神经节细胞中NSE呈明显阳性反应,S-100染色可见数量较少的细胞状"空白区".结论 HD的诊断主要根据病理特征而定,在HE染色基础上结合NSE及S-100蛋白免疫组织化学染色能提高确诊率,为HD和HAD鉴别诊断提供依据.%Objective:To explore the values of neuron-specific enolase(NSE) and soluble-protein 100(S-100) of the markers of neuron and neuroglial in the diagnosis of Hirschsprung's disease( HD) and Hirschsprung's disease allied disorders( HAD). Methods: The morphological and quantity change of the neuron and ganglion cells of surgical resection specimens from 45 cases with HD were observed by HE staining, which were compared with normal tissues which located the margin of tumor. The expressions of NSE and S-100 of 21 cases with HAD were analysed by IHC. Results: The heterogeneous NSE immunoreactivities of gangliocytes in knot bowel wall plexus and the evenly distributing of nerve fiber in each layer of the bowel of the control group were observed. The S-100 expression of ganglion cells body showed cell shape " blank area". The differentiation abnormalities bowel, the postive NSE

  4. D’allié à ennemi. Stéréotypes et représentations du combattant russe dans les magazines illustrés français durant la Grande Guerre

    Joceline Chabot

    2011-05-01

    Full Text Available Les recherches récentes en histoire sociale et culturelle sur la Grande Guerre s’intéressent notamment à l’étude de la production littéraire, médiatique et iconographique comme pratique signifiante et représentative de l’expérience individuelle et collective de la guerre, ce que les historiens identifient comme les « cultures de guerres ». Ces « cultures de guerre » sont analysées, entre autres, à partir de la presse, dont la situation privilégiée au carrefour de l’opinion publique et de la propagande gouvernementale, en fait un objet d’étude significatif pour mieux comprendre la mobilisation des populations dans le cadre d’une guerre totale. À partir d’une approche interdisciplinaire, notre article a pour principal objectif de dégager et d’analyser les stéréotypes qui règlent les représentations de l’allié russe dans la presse illustrée française durant la Grande Guerre. Plus précisément, nous voulons interroger l’évolution des représentations de la figure du combattant russe afin de dégager dans quelle mesure il y a eu rupture ou permanence des représentations, en fonction de l’évolution du contexte historique entre 1914 et 1920.Recent research in the social and cultural history of the Great War views literary, media, and iconographic productions as a significant aspect of the individual and collective war experience, and scholars see these productions as forming « war cultures ». Historians analyze these « war cultures » partly through the press, which position at the crossroads of government propaganda and public opinion makes it an effective tool for understanding popular mobilization in the context of a total war. Through an interdisciplinary approach, this article aims to identify the stereotypes that governed representations of the Russian ally in the French illustrated press during the Great War. Specifically, we examine the evolution the representations of the Russian

  5. 先天性巨结肠及其类缘病的临床病理学分析%Hirschsprung's disease and its allied diseases: a clinicopathologic analysis

    杨军; 刘妮; 康安静; 陈晓黎; 靳耀锋; 苏宝山; 黄莺

    2012-01-01

    目的 回顾性分析先天性巨结肠症(HD)及其类缘病(HAD)的组织病理学特征.方法 按照HD和HAD病理诊断标准,回顾性分析217例临床诊断为巨结肠患者的病理切片.进行病理学诊断.结果 217例临床诊断为巨结肠的病例中,典型HD仅占41.47% (90/217),男女比例为8∶1;HAD占58.53%(127/217),男女比例为2.85∶1.结论 按照HD和HAD病理学诊断标准,临床上表现为巨结肠的患儿中58.53%的病例为HAD,HAD与HD患儿男女比例明显不同,提示两者可能具有不同的发病机制.%Objective To investigate clinical and histopathological characteristics of Hirschsprung's disease (HD) and HD allied disease (HAD) by a retrospective analysis.Methods Records of 217 cases clinical diagnosed as megacolon were retrospectively analyzed according to the standard for HD and HAD pathologic diagnosis.Results Among the 217 cases, 90 (41. 47% ) cases were typical HD, and the sex ratio was 8: 1 ;. 127 (58. 53% ) cases were HAD, and the sex ratio was of 2. 85: 1. Conclusion Totally 58. 53% of cases are HAD in the cases clinically diagnosed as megacolon. At the same time, HAD cases have a different sex ratio from typical HD case, suggesting that they may have a different pathogenesis.

  6. Statin myalgia is not associated with reduced muscle strength, mass or protein turnover in older male volunteers, but is allied with a slowing of time to peak power output, insulin resistance and differential muscle mRNA expression.

    Mallinson, Joanne E; Marimuthu, Kanagaraj; Murton, Andrew; Selby, Anna; Smith, Kenneth; Constantin-Teodosiu, Dumitru; Rennie, Michael J; Greenhaff, Paul L

    2015-03-01

    Statins are associated with muscle myalgia and myopathy, which probably reduce habitual physical activity. This is particularly relevant to older people who are less active, sarcopaenic and at increased risk of statin myalgia. We hypothesised that statin myalgia would be allied to impaired strength and work capacity in older people, and determined whether differences aligned with divergences in lean mass, protein turnover, insulin sensitivity and the molecular regulation of these processes. Knee extensor strength and work output during 30 maximal isokinetic contractions were assessed in healthy male volunteers, nine with no statin use (control 70.4 ± 0.7 years) and nine with statin myalgia (71.5 ± 0.9 years). Whole body and leg glucose disposal, muscle myofibrillar protein synthesis (MPS) and leg protein breakdown (LPB) were measured during fasting (≈5 mU l(-1) insulin) and fed (≈40 mU l(-1) insulin + hyperaminoacidaemia) euglyceamic clamps. Muscle biopsies were taken before and after each clamp. Lean mass, MPS, LPB and strength were not different but work output during the initial three isokinetic contractions was 19% lower (P < 0.05) in statin myalgic subjects due to a delay in time to reach peak power output. Statin myalgic subjects had reduced whole body (P = 0.05) and leg (P < 0.01) glucose disposal, greater abdominal adiposity (P < 0.05) and differential expression of 33 muscle mRNAs (5% false discovery rate (FDR)), six of which, linked to mitochondrial dysfunction and apoptosis, increased at 1% FDR. Statin myalgia was associated with impaired muscle function, increased abdominal adiposity, whole body and leg insulin resistance, and evidence of mitochondrial dysfunction and apoptosis.

  7. The Clinical Experience of Thalidomide and Radiotherapy ally Themotherapy in Treating Non-small-cell Lung Carcinoma%沙利度胺联合放化疗治疗中晚期非小细胞肺癌的临床观察

    徐彬; 李智强; 王小龙; 徐玉春

    2012-01-01

    Objective To evaluated the curative effects of thalidomide and radiotherapy ally themotherapy in treating non-small-cell lung carcinoma. Methods The treatment group use thalidomide and radiotherapy ally themotherapy. The control group only use radiotherapy and themotherapy. Diagnosis the curative effects and adversal reaction of the two team. Results Use thalidomide and radiotherapy ally themotherapy in the same times not only can improve the short-term curative effects of the treatment group than the control team, but also have little adversal reaction. Conclusion Do by not only radiotherapy and themotherapy, but also use thalidomide in treating non-small-cell lung carcinoma, can improve the short-term curative effects, also the side effects have not obviously increase.%目的 探讨沙利度胺联合放化疗治疗中晚期非小细胞肺癌的疗效.方法 治疗组给予沙利度胺联合放化疗治疗;对照组仅行放化疗,分析2组患者生存率的差异.结果 沙利度胺联合放化疗治疗组的近期疗效(43.3%)明显高于单纯放化疗对照组(36.7%).结论 采用沙利度胺联合放化疗治疗中晚期非小细胞肺癌,近期疗效良好,毒副作用无明显增加.

  8. Measurement of the in-pile core temperature of an EL-4 pencil element, first charge (can of type-347 stainless steel, 0.4 mm thick, UO{sub 2} fuel, 11 mm diameter). Determination of the apparent thermal conductivity integral of in-pile UO{sub 2}; Mesure de la temperature a coeur en pile d'un crayon EL-4 1er jeu (gaine acier inoxydable, nuance 347 - epaisseur 0,4 mm - combustible UO{sub 2} - diametre 11 mm). Determination de l'integrale de conductibilite thermique apparente de l'UO{sub 2} en pile

    Lavaud, B.; Ringot, C.; Vignesoult, N. [Commissariat a l' Energie Atomique, Centre d' Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)

    1966-11-01

    temperature a coeur d'un element combustible EL-4, type premier jeu, a gaine en acier inoxydable. On mesure cette temperature au coeur du crayon en pile a l'aide d'un thermocouple pour haute temperature: tungstene-rhenium a gaine tantale. Le crayon est place dans des conditions de fonctionnement analogues a celles de EL-4, tant en ce qui concerne la puissance specifique et la temperature sur gaine que la pression externe sur la gaine. La puissance specifique est obtenue dans le reacteur EL-3 avec un enrichissement de l'UO{sub 2} legerement superieur a celui normalement prevu pour EL-4. La temperature de gaine et la pression visees sont realisees a l'aide d'un conteneur d'irradiation en zircaloy-2 et a remplissage NaK, adapte, aux conditions du reacteur EL-3. - Les temperatures de l'UO{sub 2} a coeur, et de la surface de la gaine etant mesurees; - La puissance etant calculee a partir des echanges thermiques dans le conteneur etalonne en laboratoire; - La chute de temperature au contact UO{sub 2}-gaine etant deduite de mesures faites en laboratoire dans des conditions de flux calorifique comparables et sous une atmosphere de gaz correspondant au debut de la vie de l'element combustible; on peut tracer la courbe integrale de conductibilite. Les examens micro-graphiques de la structure de l'oxyde permettent de verifier la repartition des temperatures dans l'oxyde, deduite de l'integrale de conductibilite thermique. (auteurs)

  9. Expression of ret and ednrb in intestinal wall of Hirschsprung's disease and Hirschsprung's allied disease patients%ret和ednrb在先天性巨结肠症及巨结肠类源病肠壁表达的研究

    张怡先; 张利兵; 闫焕; 钟麟

    2015-01-01

    目的:通过探讨ret、ednrb基因在先天性巨结肠症(Hirschsprung disease,HD)及巨结肠类缘病(Hirschsprung allied disease,HAD)患者肠壁的表达分布情况,旨在进一步了解HD与HAD发病机制的异同,为HD与HAD的诊断及治疗提供新的研究方向.同时通过常规HE染色与免疫组化标记时HD与HAD诊断的比较,深入了解免疫组化标记技术在HD和HAD诊断中的临床价值.方法:复习巨结肠术后病例HE切片,结合先镜下肠壁的形态特征,初步诊断分组.应用蛋白基因产物9.5(Protein gene product 9.5,PGP9.5)和神经元特异性烯醇化酶(Neuron specific enolase,NSE)免疫组化技术对经HE染色病理初步诊断为HD,HAD和不明确组的病变肠段再次诊断分组.HD肠段分别取狭窄段和扩张段与10例正常结肠行RET抗体、EDNRB抗体免疫组化染色,比较RET和EDNRB的染色结果和分布特点.结果:HE染色8例诊断不明确者,经免疫组化标记后诊断明确;RET在HD狭窄段中表达较HAD和正常对照组减少(P<0.05);EDNRB在HD狭窄段中表达较HAD和正常对照组减少(P<0.05);HD和HAD扩张段与正常组的RET与EDNRB表达差异无统计学意义(P>0.05).结论:免疫组化染色有助于HD和HAD的诊断;RET和EDNRB在HD狭窄段中表达有异常,提示RET和EDNRB与HD的发生可能有关.

  10. Korean Defense Industry: Threat or Ally?

    1994-02-22

    framework for defense industrial cooperation with Korea . While Senator Dixon eventually dropped his opposition and the Korean Fighter Program is now...US defense firms to transfer technology to Korean firms, the US Government must recognize two realities: first, Korea will develop indigenous...serious Korean competition in the foreseeable future. 8 It does not appear that the Korea defense industry is poised to take away significant market

  11. Brazil - An Allied Country? (A Brazilian Approach).

    1988-03-30

    h ~A - Atacalu /rcab U Ia S y Iwrs A,~ aSao SBOLIVIA Vita so’T La Paz r n - SarntaPln Y Poi Sucre S \\ Br Dour SO aadll 01 I5 - PARAGUAY c -Rnd u1r... Cultura , Fundagdo Nacional de Material Escolar, Rio de Janeiro, 1980. 17. Modernizacdo dg Exritg, 3a. Reunido de Intercdmbio Doutrin~rio entre os Ex

  12. Carotenoids: potential allies of cardiovascular health?

    Maria Alessandra Gammone

    2015-02-01

    Full Text Available Carotenoids are a class of natural, fat-soluble pigments found principally in plants. They have potential antioxidant biological properties because of their chemical structure and interaction with biological membranes. Epidemiologic studies supported the hypothesis that antioxidants could be used as an inexpensive means of both primary and secondary cardiovascular disease (CVD prevention. In fact, the oxidation of low-density lipoproteins (LDL in the vessels plays a key role in the development of atherosclerotic lesions. The resistance of LDL to oxidation is increased by high dietary antioxidant intake, so that carotenoids, as part of food patterns such as the Mediterranean diet, may have beneficial effects on cardiovascular health too. Further properties of carotenoids leading to a potential reduction of cardiovascular risk are represented by lowering of blood pressure, reduction of pro-inflammatory cytokines and markers of inflammation (such as C-reactive protein, and improvement of insulin sensitivity in muscle, liver, and adipose tissues. In addition, recent nutrigenomics studies have focused on the exceptional ability of carotenoids in modulating the expression of specific genes involved in cell metabolism. The aim of this review is to focus attention to this effect of some carotenoids to prevent CVD.

  13. ZnO nanocrystals and allied materials

    Okada, Tatsuo

    2014-01-01

    ZnO has been the central theme of research in the past decade due to its various applications in band gap engineering, and textile and biomedical industries. In nanostructured form, it offers ample opportunities to realize tunable optical and optoelectronic properties and it was also termed as a potential material to realize room temperature ferromagnetism. This book presents 17 high-quality contributory chapters on ZnO related systems written by experts in this field. These chapters will help researchers to understand and explore the varied physical properties to envisage device applications of ZnO in thin film, heterostructure and nanostructure forms.

  14. IPodcasting: An Ally in Curriculum Design

    Hay, H. R.

    2008-01-01

    One of the major challenges facing South African higher education institutions is to deal with the learning preferences and styles of an increasing diverse student population. Although much research has been conducted on the identification of learning styles theories for classroom application, little attention has been devoted to the investigation…

  15. Justified Humanitarian Intervention: Operation ALLIED FORCE

    2013-04-25

    Intervention” in J.L. Holzgrefe and Robert O. Keohane , eds. Humanitarian Intervention: Ethical, Legal and Political Dilemmas (Cambridge: Cambridge...Gamble. Annapolis, MD: Naval Institute Press, 2007. Holzgrefe, J.L. and Robert O. Keohane . eds. Humanitarian Intervention: Ethical, Legal and

  16. Great wits and madness: more near allied?

    Jamison, Kay Redfield

    2011-11-01

    A purported association between creativity and psychopathology is ancient, persistent and controversial. Biographical research, studies of living artists and writers, and investigations into the cognitive and temperamental factors linked to both creativity and mood disorders suggest a more specific link to bipolar illness. A new, large and well-designed population-based study adds further support to this connection.

  17. Didymocarpus corchorifolius and its allies (Gesneriaceae)

    Weber, A.; Burtt, B.L.

    1983-01-01

    Didymocarpus sect. Elati Ridley, later reduced by its author to sect. Didymocarpus, is redefined and reinstated for the accommodation of 4 or 5 morphologically distinctive Malayan species: D. corchorifolius DC. (Pulau Penang, S. Thailand), D. antirrhinoides A. Weber, sp. nov. (confused under the for

  18. Allied Command Structures in the New NATO

    1997-01-01

    Aircraft Carriers Other Surface Combatants* Attack Submarines Amphibious Ready Groups Command Ship Mobile Logistics Support** Sub Tender Maritime...29% of file enlisted personnel for the ACE Mobility Coordination Center (SHAPE). From the Regional Air Movement Coordination Center h~ Vicenza...Bosnia primarily to stop air attacks by the Serbian Air Force. 58 T H E U . S . R O L E IN A F S O U T H Advanced U.S. techonology employed

  19. Mast cells and cancer: enemies or allies?

    Dyduch, Grzegorz; Kaczmarczyk, Karolina; Okoń, Krzysztof

    2012-03-01

    Mast cells are a component of cancer microenvironment the role of which is complex and poorly understood. Mast cells promote cancer growth by stimulation of neoangiogenesis, tissue remodeling and by modulation of the host immune response. The mediators of cancer promotion include protease-activated receptors, mitogen activated protein kinases, prostaglandins and histamine. Histamine may induce tumor proliferation and immunosuppression through H1 and H2 receptors, respectively. The mast cell-derived modulators of immune response include also interleukin 10 (IL-10), tumor necrosis factor α (TNF-α) and CD30L. Possibly stimulation of angiogenesis is the most important. Mast cells release potent proangiogenic factors such as vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), transforming growth factor β (TGF-β), TNF- α and IL-8, and mast cells' enzymes, like metaloproteinases (MMPs), tryptase and chymase participate in vessels' formation. The anti-cancer actions of mast cells include direct growth inhibition, immunologic stimulation, inhibition of apoptosis and decreased cell mobility; the mediators of these processes include chymase, tryptase, TNF-α, IL-1 and IL-6. The very same mediators may exert both pro- or anti-cancer effects depending on concentration, presence of cofactors or location of secreting cells. In fact, peri- and intra-tumoral mast cells may have dissimilar effects. Understanding of the role of mast cells in cancer could lead to improved prognostication and development of therapeutic methods targeting the mast cells.

  20. Worms,Your Unlikely Allies etc

    2012-01-01

    Back in the Stone Age,humans had to put up with all sorts of creepy crawlies.Parasites - organisms that live on or in another organism - lingered inside our bodies,living off of our blood.Because internal parasites go mostly unnoticed,they were able to keep living with humans.People can survive a long time with tiny parasitic worms in their intestines.

  1. On Phasianus ignitus and its nearest allies

    Büttikofer, J.

    1896-01-01

    While working out the ornithological results of the Dutch expedition to Central Borneo, I had to decide which name to bestow upon the Bornean Crested Fire-back, generally known as Euplocamus nobilis Scl., but afterwards united with E. ignitus Lath. by Elliot (Ibis 1878, p. 414), and lately also by O

  2. Effects of visitation among allied health professionals.

    Hofhuis, H.; Ende, C.H.M. van den; Bakker, D. de

    2006-01-01

    OBJECTIVE: Visitation is a method for external peer review. The goal is to improve the quality of patient care by giving feedback on quality of competence and performance of a professional during a practice visit. Feedback is offered as recommendations for improvement. This study aims to evaluate th

  3. Robotics and allied technologies in endoscopic surgery.

    Buess, G F; Schurr, M O; Fischer, S C

    2000-02-01

    Endoscopic surgery was developed in the 1970s and 1980s, with initial work conducted by pioneering surgeons. After the development of laparoscopic cholecystectomy, the breakthrough of endoscopic surgery had a great effect on all surgical specialties. Starting with rather simple procedures, such as cholecystectomy, a rapid progression toward more complex procedures, such as reflux or colonic surgery, took place. It was realized at this time that the existing endoscopic instruments allowed only a limited preciseness when performing the procedures, and part of the information from inside the abdominal cavity was not available to the surgeon. This prompted a discussion with engineers concerning the development of more advanced technologies to give those performing endoscopic surgery the same quality of information and manipulation that surgeons have when performing open surgery. These qualities include (1) instruments and manipulators that allow surgical action under endoscopic control with all degrees of freedom; (2) devices that provide surgeons with tactile feedback; and (3) vision systems that provide surgeons with the same quality of visual information as with open surgery, namely, high resolution, excellent color quality, precise spatial information, and a constant clear view for optimal surgical action. At the end of 1999, some of the aforementioned quality concepts found their way into the surgical routine, but most of the concepts are still being developed. Another decade will pass before endoscopic surgery procedures will be closer to the technological goals.

  4. Innovative Allies: Spatial and Creative Abilities

    Coxon, Steve V.

    2012-01-01

    Spatial and creative abilities are important for innovations in science, technology, engineering, and math (STEM) fields, but talents are rarely developed from these abilities by schools, including among gifted children and adolescents who have a high potential to become STEM innovators. This article provides an overview of each ability and makes…

  5. When to ally & when to acquire.

    Dyer, Jeffrey H; Kale, Prashant; Singh, Harbir

    2004-01-01

    Acquisitions and alliances are two pillars of growth strategy. But most businesses don't treat the two as alternative mechanisms for attaining goals. Consequently, companies take over firms they should have collaborated with, and vice versa, and make a mess of both acquisitions and alliances. It's easy to see why companies don't weigh the relative merits and demerits of acquisitions and alliances before choosing horses for courses. The two strategies differ in many ways: Acquisition deals are competitive, based on market prices, and risky; alliances are cooperative, negotiated, and not so risky. Companies habitually deploy acquisitions to increase scale or cut costs and use partnerships to enter new markets, customer segments, and regions. Moreover, a company's initial experiences often turn into blinders. If the firm pulls off an alliance or two, it tends to enter into alliances even when circumstances demand acquisitions. Organizational barriers also stand in the way. In many companies, an M&A group, which reports to the finance head, handles acquisitions, while a separate business development unit looks after alliances. The two teams work out of different locations, jealously guard turf, and, in effect, prevent companies from comparing the advantages and disadvantages of the strategies. But companies could improve their results, the authors argue, if they compared the two strategies to determine which is best suited to the situation at hand. Firms such as Cisco that use acquisitions and alliances appropriately grow faster than rivals do. The authors provide a framework to help organizations systematically decide between acquisition and alliance by analyzing three sets of factors: the resources and synergies they desire, the marketplace they compete in, and their competencies at collaborating.

  6. 渝鄂湘黔交界民族地区经济联动机制探讨%A Probe into the District Allied Economic Mechanism in Ethnic Minority Areas at the Common Border of Chongqing, Hubei, Hunan and Guizhou

    邓正琦

    2012-01-01

    Wuling Mountain economic coordination region is designed for the sound and coordinated eco- nomic development in the vast national poverty - stricken areas. However, due to the restrictions of systems and mechanisms, there exist many deep -seated problems in this district allied economic region in ethnic mi- nority areas at the common border of Chongqing, Hubei, Hunan and Guizhou. Only careful consideration of the specific regional conditions is taken a probe into the construct a scientific district allied economic mecha- nism in these areas, can the sound and coordinated economic development here be guaranteed.%为促进国家级连片贫困地区经济协调健康发展,武陵山经济协作区产生,但受体制机制约束,渝鄂湘黔交界民族地区经济联动存在一些深层次问题。只有从特殊区情出发,构建渝鄂湘黔交界民族地区经济联动机制,才能促进该地区经济协调健康发展。

  7. Expresion of 5 - Hydroxytryptamine 4 Receptor in Congenital Hirschsprung's Disease and Hirschsprung's Allied Disease%5-羟色胺4受体在先天性巨结肠和同源病中的表达

    朱旭; 魏明发; 卞红强; 段栩飞

    2012-01-01

    目的 探讨5-羟色胺4(5-HT4)受体在先天性巨结肠(HD)和先天性巨结肠同源病(HAD)中的表达,并研究能否将此检测应用于HD和HAD的术前鉴别诊断.方法 共收集HD标本25例(HD组)、HAD标本20例(HAD组)和正常结肠标本15例(正常对照组).应用免疫组织化学SP法染色,分析5-HT4受体表达的部位及肠管不同部位5-HT4受体表达水平强度的差异.采用t检验比较其表达是否存在差异性.结果 HD组5-HT4受体阳性指数在远端黏膜层较近端表达下降,肌间神经丛无表达;HAD组远端5 -HT4受体阳性指数在黏膜层和肌间神经丛中均显著低于近端.与正常对照组比较,HD组和HAD组5-HT4受体阳性指数在黏膜及肌间神经从表达均下降.结论 5 -HT4受体在HD及HAD中的表达水平可作为术前鉴别诊断的参考指标之一,也为临床治疗提供新的参考指标.%Objective To explore the role of 5 - hydroxytryptamine 4(5 - HT4) receptor in the pathogenesis of Hirschsprung disease (HD)and Hirschsprung's allied disorder (HAD) .and to research whether the study could be used for preoperative diagnosis of HD and HAD. Methods Twenty -five cases of HD specimens( HD group) .20 cases of HAD specimens( HAD group) and 15 normal colon specimens (normal control group) were collected. SP irnmunorustochemical staining was used to analyze 5 - HT4 receptor sites and the differences of 5 - HT4 receptor sites expression levels in different parts of intestines. T - test was adopted to compare the expression differences. Results In HD group, 5 - HT4 receptors in the distal end of mucosa decreased compared with the proximal end, while 5 - HT4 receptors were not expressed in the mye-nteric plexus of the proximal end. In HAD group, the number of 5 - HT4 receptors also decreased in the distal mucosa and myenteric plexus. Compared with the normal control group ,5 - HT4 receptor expression decreased in HD group and HAD group. Conclusion 5 - HT4 receptors in HD/HAD can

  8. 发展健康相关专业高等教育应成为我国医学教育现代化的重要任务%The development of high educatiou of allied health profession should play a principal role in medical modernization chinese education

    周同甫; 梁宗安; 李甘地; 贺庆军

    2002-01-01

    健康相关专业(Allied Health Profession,AHP)教育的任务是培养与现代医学相关的各类高级技师.尽快弥补我国在高等教育层次上缺乏相应的专业设置的缺陷,开展有关的本科和高等职业教育,是关系到实现我国医学和医疗服务现代化的重要任务.通过介绍四川大学华西临床医学院的初步实践,并就我国开展AHP教育的理念、方向、策略和存在的问题进行了讨论.

  9. Thermal fatigue cracking of austenitic stainless steels; Fissuration en fatigue thermique des aciers inoxydables austenitiques

    Fissolo, A

    2001-07-01

    This report deals with the thermal fatigue cracking of austenitic stainless steels as AISI 316 LN and 304 L. Such damage has been clearly observed for some components used in Fast Breeder reactors (FBR) and Pressure Water Reactor (PWR). In order to investigate thermal fatigue, quasi-structural specimen have been used. In this frame, facilities enforcing temperature variations similar to those found under the operation conditions have been progressively developed. As for components, loading results from impeded dilatation. In the SPLASH facility, the purpose was to establish accurate crack initiation conditions in order to check the relevance of the usual component design methodology. The tested specimen is continuously heated by the passage of an electrical DC current, and submitted to cyclic thermal down shock (up to 1000 deg C/s) by means of periodical spraying of water on two opposite specimen faces. The number of cycles to crack initiation N{sub i} is deduced from periodic examinations of the quenched surfaces, by means of optical microscopy. It is considered that initiation occurs when at least one 50{mu}m to 150{open_square}m long crack is observed. Additional SPLASH tests were performed for N >> N{sub i}, with a view to investigate the evolution of a surface multiple cracking network with the number of cycles N. The CYTHIA test was mainly developed for the purpose of assessing crack growth dynamics of one isolated crack in thermal fatigue conditions. Specimens consist of thick walled tubes with a 1 mm circular groove is spark-machined at the specimen centre. During the test, the external wall of the tube is periodically heated by using a HF induction coil (1 MHz), while its internal wall is permanently cooled by flowing water. Total crack growth is derived from post-mortem examinations, whereby the thermal fatigue final rupture surface is oxidized at the end of the test. The specimen is broken afterwards under mechanical fatigue at room temperature. All the tests confirm that usual approaches are adapted in used conditions ( 280 {<=} T{sub max} {<=} 550 deg C, 100 {<=} {open_square}T {<=} 300 deg C): they are simply based on thermal loading mechanical loading equivalence. However, they appear not to be well adapted when additional factors exist such as roughness, residual stresses... Furthermore, Scanning Electron Microscopy observations show that damage is initiated well before the 'engineer initiation', as previously detected using optical microscopy on SPLASH specimen. First stage damage evolutions are thus a new task. Strain and stress fields generated during test are estimated thanks to finite element method computations (FEM), using CASTEM-2000 CEA software. Information coming from these FEM computations monitor lower-scale modelling: Discrete dislocation Dynamics (MICROMEGAS software). In order to continue that task, a new specimen has been adapted to the CYTHIA facility. Specimens consist of removable disks in which different and well-controlled conditions may be enforced. In order to estimate propagation of long crack, conventional fracture mechanic approach seems to be well adapted. The effective Stress Intensity Factor calculation takes into account of plastic strain. Furthermore, it is assumed that crack is opened during 60 % of cyclic loading. Shielding effect is clearly underlined by all the observations: on surface, on cross side section, and after sub-surface step-by-step removal. Multiple crack propagation (in the depth direction) is simulated using the previous single crack modelling. An auto-adaptative meshing allows simulating growth of 10 cracks up to 35,000 cycles. Two-development tasks are now in progress. The first task is oriented on the multiple crack growth and stability after an additional mechanical loading. The second task deals with the first damage stage up to the 'engineer crack initiation'. (author)

  10. Mod\\'elisation multidomaine du comportement magn\\'eto-m\\'ecanique des aciers dual-phases

    Mballa, Frederick Mballa; Lazreg, Said; Meilland, Philip

    2011-01-01

    The microstructure and mechanical behavior of dual-phase steels are highly sensitive to the variation of the process (heat treatments). Online control by magnetic method is relevant. A measurement under applied stress must be considered. The dual-phase is a two-phase medium (ferrite / martensite). Each phase can be considered as a sphere embedded in a homogeneous equivalent medium. The model used for each phase is based on a magneto-mechanical coupled model. This is an explicit single crystalline model representative of the behavior of the corresponding phase. Localization rules allow the simulation of the two-phases medium. Experiments and modeling are compared.

  11. Going to War with the Allies You Have: Allies, Counterinsurgency, and the War on Terrorism

    2005-11-01

    illegal political organizations. Insurgent activity -including guerrilla warfare, terrorism, and political mobilization, for example, propaganda ...requires massive resources to tackle. 26 Repressive Bad intelligence Political Syatem Officer contempt for NCOs, soldiers, Politica Syatem and low-level

  12. In situ and glancing angle X-ray diffraction of the structure change during and after the high temperature oxidation at 1000 ^{circ}C in air of an yttrium-implanted 304 steel

    Riffard, F.; Buscail, H.; Caudron, E.; Cueff, R.; Rabaste, F.; Issartel, C.

    2002-07-01

    A study has been made of the initial stages of oxidation of yttrium ion implanted 304 steel in an attempt to shed some light on the so-called `reactive element effect' observed on chromia forming alloys. In situ XRD was used in order to observe the initial local structural changes during the high temperature oxidation process, while glancing angle XRD was used to monitor the longer range structural transformations taking place near the surface after cooling of oxidised samples. The treatment by ion implantation promotes the intensive establishment of the chromic layer, which leads to the inhibition of the formation of iron rich oxides, by preventing the diffusion of iron through the more compact and more uniform layer initially formed than it would be in the absence of yttrium. However, the identification of yttried phases could not be established. L'effet bénéfique d'un traitement par implantation ionique d'yttrium sur un acier 304 a été mis en évidence par le suivi d'analyses in situ développées par diffraction des rayons X au cours de son oxydation isotherme à 1000^{circ}C sous air. Malgré l'altération superficielle du substrat, le traitement par implantation ionique favorise l'établissement accéléré de la couche de chromine et inhibe la formation au cours du processus d'oxydation des oxydes contenant du fer, réputés peu protecteurs, car faiblement adhérents. Des analyses conduites après refroidissement des échantillons oxydés par diffraction des rayons X sous incidence rasante révèlent la localisation de la structure spinelle au manganèse à l'interface le plus externe. L'identification de phases yttriées n'a cependant pu être établie.

  13. Cinetique de precipitation de la phase γ' et son influence sur la limite d'elasticite d'un alliage Fe-Ni-Cr

    Tavassoli, A. A.; Pozarnik, F.

    1984-04-01

    La cinétique de précipitation et coalescence de la phase γ' dans l'alliage 800 — acier austénique contenant 33% de nickel, 20% de chrome et des faibles quantités de titane et d'aluminium — a été étudiée. Les résultats obtenus permettent d'établir une loi globale donnant la variation de la taille des particules de γ' en fonction de la température, de la durée de vieillissement et de la composition chimique de l'alliage. Cette loi est utilisée pour calculer la variation de la limite d'élasticité de l'alliage provoquée par la formation de la phase γ'. Les calculs sont basés sur les théories d'interaction de paires de dislocations (faiblement ou fortement couplées) avec des particules cohérentes, ordonnées dépourvues de contrainte: l'anisotropie de tension de ligne des dislocations est prise en compte ainsi que l'influence de la déformation induite par le 'défaut de compatibilité' (misfit). La variation de la limite d'élasticité ainsi calculée est comparée à celle obtenue expérimentalement et il est démontré que le survieillissement n'interviendra pas avant 2×10 5 h aux températures de service inférieures à 550°C.

  14. Effets des transferts radiatifs sur les écoulements de convection naturelle dans une cavité différentiellement chauffée en régimes transitionnel et faiblement turbulent

    Soucasse, Laurent

    2013-01-01

    Radiative transfer effects on natural convection flows are investigated in transitional and turbulent regimes. Air/H2O/CO2 mixtures contained in cubical differentially heated cavities are considered. Benchmark numerical simulations are carried out up to Ra=3x108 by coupling a spectral collocation method for the flow and a ray tracing method, associated with an ADF model, for radiation. In order to study the turbulent regime, a radiative transfer model based on spatial filtering is proposed: f...

  15. Contrôle de la température durant le processus de dégradation d'un acier Z12CNS20 en frottement avec un acier Z200C13

    Khanafi-Benghalem, N.; Loucif, K.; Benghalem, K.; Boudoukha, H.; Louahdi, R.

    2005-05-01

    La température de contact lors des essais d'usure varie d'une manière spontanée et aléatoire. Cette température de contact dépend essentiellement de la nature du couple des matériaux en contact de la charge et de la vitesse. Cependant la mesure de la température est très difficile à effectuer compte tenu du choix de l'endroit de prise de la température et des phénomènes d'évacuation de la chaleur et de la dissipation de l'énergie. Dans ce travail nous exposons une méthode très simple de mesure de la température et nous étudions par conséquent la variation de la température du Z12CNS20 / Z200C13. Au cours des essais d'usure pour différentes vitesses de glissement, nous montrons en effet que la température augmente d'une manière progressive en fonction de la vitesse puis elle s'élève brutalement au fur et à mesure qu'on se rapproche du point de contact, et enfin nous prouvons par observation métallographique que l'échantillon subit un écoulement plastique provoqué par l'élévation de la température en fonction de la vitesse.

  16. Investigation of Solidification of High Strength Steel Castings

    1961-12-01

    2U9-259. 23. A. Kohn: "Etude de I’homogeneisation des segregations dendritiques de phosphore et ’ rsenic dans les aciers ...de la structure en bandes dans 1’ acier forge", Memoires Scientifiques de la Revue de Metallurgie, v. «j£, 6, I96I, pp. 423-^3...dans les aciers ". Revue de Metallurgie, February i960, pp. 117-134. 35. R. Castro and A. Gueussier: "La fragilite des aciers speciaux

  17. Chemotaxonomy of Veroniceae and its allies in the Plantaginaceae

    Taskova, Rilka Mladenova; Gotfredsen, Charlotte Held; Jensen, Søren Rosendal

    2006-01-01

    studied, 28 different iridoid glucosides and ten caffeoyl phenylethanoid glucosides (CPGs), as well as salidroside and arbutin were isolated and characterized by NMR; of these, five compounds were previously unknown. It was found that the representatives of Veroniceae, as well as Globularia, were...

  18. Trusted Allies with New Benefits: Repositioning Existing Drugs

    Gao, Xin

    2016-01-25

    The classical assumption that one drug cures a single disease by binding to a single drug-target has been shown to be inaccurate. Recent studies estimate that each drug on average binds to at least six known and several unknown targets. Identifying the “off-targets” can help understand the side effects and toxicity of the drug. Moreover, off-targets for a given drug may inspire “drug repositioning”, where a drug already approved for one condition is redirected to treat another condition, thereby overcoming delays and costs associated with clinical trials and drug approval. In this talk, I will introduce our work along this direction. We have developed a structural alignment method that can precisely identify structural similarities between arbitrary types of interaction interfaces, such as the drug-target interaction. We have further developed a novel computational framework, iDTP that constructs the structural signatures of approved and experimental drugs, based on which we predict new targets for these drugs. Our method combines information from several sources including sequence independent structural alignment, sequence similarity, drug-target tissue expression data, and text mining. In a cross-validation study, we used iDTP to predict the known targets of 11 drugs, with 63% sensitivity and 81% specificity. We then predicted novel targets for these drugs—two that are of high pharmacological interest, the peroxisome proliferator-activated receptor gamma and the oncogene B-cell lymphoma 2, were successfully validated through in vitro binding experiments.

  19. The Supreme Allied Commander’s Operational Approach

    2014-05-22

    Strategy in Europe, 1944–45,” War & Society, vol. 30, no. 2 (August 1, 2011): 117, http://openurl.ingenta.com c/content/xref? genre =article&issn...Operations, 4–9; John A. Bonin and Mark H. Gerner, Continuous Concentric Pressure ( Institute of Land 12 CASE STUDIES Operations Goodwood and...Have Won World War II. 1st ed. New York: Morrow, 1993. Bonin, John A., and Mark H. Gerner. Continuous Concentric Pressure. Institute of Land Warfare

  20. Alumina Producers in Shandong Province Allied to Win Negotiation

    2008-01-01

    <正>Faced with the soaring bauxite price,five alu- mina producers in Shandong Province jointly established Shangdong Bauxite Import Compa- nies Club to gain a better position in price ne- gotiation with foreign counterparts by getting

  1. Kas Viljandi ikka vajab oma Treffnerit? / Alli Lunter

    Lunter, Alli

    2010-01-01

    Viljandi linnavalitsuse soovunelm on teha oma Treffner. Minister Lukas võttis haridusrahva survel gümnaasiumi ja põhikooli lahutamise mõtte tagasi, aga Viljandi linnavolikogu on võtnud endale ikkagi voli rajada Viljandisse ühendgümnaasium

  2. Huvi Interneti andmebaaside vastu on tõusuteel / Ally Renter

    Renter, Ally

    2002-01-01

    Elektroonilise äri hetkeseisust: hästi ei lähe eraisikuile suunatud e-kaubamajadel, kuid firmade koduleheküljed ja link-süsteemid ostjate ja müüjate vahel (näiteks andmebaas www.kompass.com) on arvestatavad reklaami- ja turunduskanalid

  3. History Textbook Reform in Allied Occupation Japan, 1945-52.

    Thakur, Yoko H.

    1995-01-01

    Observes that, although textbook reform in occupied Japan originally supported democratic principles of openness and competition, it later became a mechanism for anticommunist censorship. Maintains that interpretations of Japan's military conduct remain highly politicized and controversial. (MJP)

  4. Immobilization of Lipase by Covalent Binding on Crosslinked Ally Dextran

    WangChen; SongGuoqiang; 等

    1998-01-01

    Lipase was immobilized by covalent binding on crosslinked allyl dextran using SESA as coupling agent.It is shown that this immobilization approach is an efficient one for lipase.The activity of the immobilized lipase can reach to 300-450U/g(dry weight).It exhibits good temperature stability,can retain 88% activity after being incubated at 70℃ for 2h.Special effects will be expected from our immobilized lipase in its applications in organic media due to the nature of the support.

  5. Plectranthus (Labiatae and allied genera in Southern Africa

    L. E. Codd

    1975-12-01

    Full Text Available A revision is presented of the 40 species of Plectranthus, 1 species of Rabdosia and 3 species of Solenostemon which are indigenous, semi-naturalized or widely cultivated in Southern Africa. Descriptions, illustrations, keys and distribution data are provided. The following new names are published:  P. mutabilis Codd,  P. psammophilus Codd,  P. rubropunctatus Codd,  P. unguentarius Codd,  P. ornatus Codd (nom. nov. for Coleus comosus Hochst. ex Guerke, P. zatarhendi (Forsk. E. A. Bruce var.  tomentosus (Benth. Codd, —var.  woodii  (Guerke Codd,  P. madagascariensis (Pers. Benth. var.  aliciae  Codd,  Solenostemon scutellarioides (L. Codd and  S. shirensis (Guerke Codd.

  6. Tin - an unlikely ally for silicon field effect transistors?

    Hussain, Aftab M.

    2014-01-13

    We explore the effectiveness of tin (Sn), by alloying it with silicon, to use SiSn as a channel material to extend the performance of silicon based complementary metal oxide semiconductors. Our density functional theory based simulation shows that incorporation of tin reduces the band gap of Si(Sn). We fabricated our device with SiSn channel material using a low cost and scalable thermal diffusion process of tin into silicon. Our high-κ/metal gate based multi-gate-field-effect-transistors using SiSn as channel material show performance enhancement, which is in accordance with the theoretical analysis. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  7. The media and the military: Allies or adversaries?

    Leopold Scholtz

    2012-02-01

    Full Text Available Military commanders like Alexander the Great or Richard the Lionheart did not have to take public opinion greatly into account when they planned their campaigns in their day. Today it is a very different situation. In the light of the above this article starts with two somewhat startling quotes by the futurologists Alvin and Heidi Toffler: "The people thinking hardest about warfare in the future know that some of the most important combat of tomorrow will take place on the media battlefield." They also state: “[T]he media, including channels and technologies unimagined today, will be a prime weapon for Third Wave combatants in both the wars and anti-wars of the future, a key component of knowledge strategy.” In recent years, much has been made of the adversarial relations between journalists and the military. The media have, for instance, been blamed for the US defeat in Vietnam, for unthinkingly blabbing about tactical decisions in advance in the Falklands, etc. From their side, journalists have been blaming the military for not trying to understand the nature of their job, of covering up a number of bad things, etc.

  8. Will Allis Prize Talk: Electron Collisions - Experiment, Theory and Applications

    Bartschat, Klaus

    2016-05-01

    Electron collisions with atoms, ions, and molecules represent one of the very early topics of quantum mechanics. In spite of the field's maturity, a number of recent developments in detector technology (e.g., the ``reaction microscope'' or the ``magnetic-angle changer'') and the rapid increase in computational resources have resulted in significant progress in the measurement, understanding, and theoretical/computational description of few-body Coulomb problems. Close collaborations between experimentalists and theorists worldwide continue to produce high-quality benchmark data, which allow for thoroughly testing and further developing a variety of theoretical approaches. As a result, it has now become possible to reliably calculate the vast amount of atomic data needed for detailed modelling of the physics and chemistry of planetary atmospheres, the interpretation of astrophysical data, optimizing the energy transport in reactive plasmas, and many other topics - including light-driven processes, in which electrons are produced by continuous or short-pulse ultra-intense electromagnetic radiation. In this talk, I will highlight some of the recent developments that have had a major impact on the field. This will be followed by showcasing examples, in which accurate electron collision data enabled applications in fields beyond traditional AMO physics. Finally, open problems and challenges for the future will be outlined. I am very grateful for fruitful scientific collaborations with many colleagues, and the long-term financial support by the NSF through the Theoretical AMO and Computational Physics programs, as well as supercomputer resources through TeraGrid and XSEDE.

  9. Service-Learning and Social Entrepreneurship: From Strangers to Allies

    Angela Lewellyn Jones

    2012-04-01

    Full Text Available Service-learning and social entrepreneurship share a common goal of engaging students in work to achieve the public good, and a desire to link education to addressing social problems and needs. Yet an examination of the two initiatives reveals that they generally co-exist on college and university campuses with little or no collaboration or communication between the two programs. This paper examines the definitions and core identities of service-learning and social entrepreneurship, exploring the potential for how the two initiatives might complement and support one another’s work in higher education. This examination includes identifying the values, philosophies, and practices that might provide common ground as well as those that might present points of conflict and tension. KEYWORDSService-learning; Social Entrepreneurship; Civic Engagement

  10. Nutrition economics - food as an ally of public health.

    Lenoir-Wijnkoop, I; Jones, P J; Uauy, R; Segal, L; Milner, J

    2013-03-14

    Non-communicable diseases (NCD) are a major and increasing contributor to morbidity and mortality in developed and developing countries. Much of the chronic disease burden is preventable through modification of lifestyle behaviours, and increased attention is being focused on identifying and implementing effective preventative health strategies. Nutrition has been identified as a major modifiable determinant of NCD. The recent merging of health economics and nutritional sciences to form the nascent discipline of nutrition economics aims to assess the impact of diet on health and disease prevention, and to evaluate options for changing dietary choices, while incorporating an understanding of the immediate impacts and downstream consequences. In short, nutrition economics allows for generation of policy-relevant evidence, and as such the discipline is a crucial partner in achieving better population nutritional status and improvements in public health and wellness. The objective of the present paper is to summarise presentations made at a satellite symposium held during the 11th European Nutrition Conference, 28 October 2011, where the role of nutrition and its potential to reduce the public health burden through alleviating undernutrition and nutrition deficiencies, promoting better-quality diets and incorporating a role for functional foods were discussed.

  11. The Eastern Dimension of America’s New European Allies

    2007-10-01

    President Vacldv Klaus has been one of the most consistent critics of Visegrdd, at one point viewing it as a Western reconstruction of Eastern Europe that...People in Need. Former President Vaclav Havel used his global stature to campaign internationally against oppressive regimes, but the government itself...was underpinned by the moral authority of President Vaclav Havel. Havel was a strong proponent of NATO enlargement and the inclusion of all post

  12. STATIC RECRYSTALLIZATION AFTER HOT WORKING OF Al-Li ALLOYS

    Gonçalves, M.; Sellars, C

    1987-01-01

    Small slabs of DC cast and homogenised 8090 and 8091 have been hot rolled in an experimental mill at temperatures in the range 300-500°C and subsequently solution treated at 550°C for times up to 48 hrs. Increase in rolling temperature leads to slower recrystallization, but the effect diminishes at long solution treatment times when the rolling temperature is above 400°C. Recrystallized grains are nearly equiaxed after rolling at temperatures below 400°C but are elongated after rolling at hig...

  13. Insects and allies associated with bromeliads: a review.

    Frank, J H; Lounibos, L P

    2009-01-01

    Bromeliads are a Neotropical plant family (Bromeliaceae) with about 2,900 described species. They vary considerably in architecture. Many impound water in their inner leaf axils to form phytotelmata (plant pools), providing habitat for terrestrial arthropods with aquatic larvae, while their outer axils provide terraria for an assemblage of fully terrestrial arthropods. Many bromeliads are epiphytic.Dominant terrestrial arthropods with aquatic larvae inhabiting bromeliad phytotelmata are typically larvae of Diptera, of which at least 16 families have been reported, but in some circumstances are Coleoptera, of which only three families have been reported. Other groups include crabs and the insect orders Odonata, Plecoptera, and Trichoptera, plus Hemiptera with adults active on the water surface. The hundreds of arthropod species are detritivores or predators and do not harm their host plants. Many of them are specialists to this habitat.Terrestrial arthropods with terrestrial larvae inhabiting bromeliad terraria include many more arachnid and insect orders, but relatively few specialists to this habitat. They, too, are detritivores or predators.Arthropod herbivores, especially Curculionidae (Coleoptera) and Lepidoptera, consume leaves, stems, flowers, pollen, and roots of bromeliads. Some herbivores consume nectar, and some of these and other arthropods provide pollination and even seed-dispersal.Ants have complex relationships with bromeliads, a few being herbivores, some guarding the plants from herbivory, and some merely nesting in bromeliad terraria. A few serve as food for carnivorous bromeliads, which also consume other terrestrial insects.Bromeliads are visited by far more species of arthropods than breed in them. This is especially notable during dry seasons, when bromeliads provide moist refugia.

  14. Solid-solution thermodynamics in Al-Li alloys

    Alekseev, A. A.; Lukina, E. A.

    2016-05-01

    The relative equilibrium concentrations of lithium atoms distributed over different electron-structural states has been estimated. The possibility of the existence of various nonequilibrium electron-structural states of Li atoms in the solid solution in Al has been substantiated thermodynamically. Upon the decomposition of the supersaturated solid solution, the supersaturation on three electron-structural states of Li atoms that arises upon the quenching of the alloy can lead to the formation of lithium-containing phases in which the lithium atoms enter in one electron-structural state.

  15. Assessment of Al-Li Alloys for Cryotanks

    Babel, Henry W.; Bozich, William; Farahmand, Bob; DeJesus, Ron; Sankaran, K. K.; Schwab, Dave; Tarkanian, Mike; Funk, Joan G. (Technical Monitor)

    2002-01-01

    This viewgraph presentation provides information on steps undertaken to determine the suitability of Aluminum and Lithium alloys in cryogenic tank construction. Major characteristics are offered for several different candidate alloys including reliability, weldability, flammability, and required thicknesses.

  16. An Update on C458 Al-Li

    Babel, Hank; Rioja, Robert

    2003-01-01

    The 1.8 Li content and consequently the 0.0945 lb.cu in density of C458 along with its higher modulus and good strength and toughness at ambient and cryogenic temperatures made it an attractive alloy for single and multiple use cryogenic tankage and unpressurized structure for space launch and operational vehicles. A major effort during the past year was directed towards establishing a production capability for C458 plate. Alcoa established a production ingot casting capability under Air Force Research Laboratory and NASA's Space Launch Initiative (SLI) sponsorship. Three heat lots of material were rolled so that the criterion for S-basis allowables could be met for AMS specifications. Lot acceptance testing showed that the strength and toughness values equaled and exceeded those obtained under the earlier Air Force Program when the alloy was developed. The details of this effort and the results achieved will be described. During the testing of compact tension specimens, particularly at cryogenic temperatures, delaminations were noted on the fractured surface. An investigation was initiated to better understand this condition. The results of this investigation will be presented which includes some of the successful production application of alloys with and without Li that exhibit this type of behavior.

  17. The sagging rope sign in Perthes' disease and allied disorders.

    Apley, A G; Wientroub, S

    1981-02-01

    The sagging rope sign is the term used to describe the radiographic appearances which sometimes occur after Perthes' disease. It is severe examples of that disease and indicates damage to the growth plate with a marked metaphysial reaction. The same appearance follows severe epiphysitis after forcible reduction of a congenitally dislocated hip, and certain rare epiphysial dysplasias. The origin and significance of the sign are discussed.

  18. India China Encounters-Allies and Competitors. A global perspective

    Schmidt, Johannes Dragsbæk

    alignments in the global context where both countries share similar interests when it comes to op-posing the US and European Union (EU) in climate change policy, world trade and to a certain ex-tent in security and energy matters. However disagreement persists on unresolved problems in terms of attracting...... FDI and other economic issues such as access to energy. When it comes to the regional Asian setting, the global alignment and foreign policy convergence appears to be replaced by a much more competitive relation in strategic terms and the two entities act more as rivals for regional hegemony than...

  19. Applied statistics for agriculture, veterinary, fishery, dairy and allied fields

    Sahu, Pradip Kumar

    2016-01-01

    This book is aimed at a wide range of readers who lack confidence in the mathematical and statistical sciences, particularly in the fields of Agriculture, Veterinary, Fishery, Dairy and other related areas. Its goal is to present the subject of statistics and its useful tools in various disciplines in such a manner that, after reading the book, readers will be equipped to apply the statistical tools to extract otherwise hidden information from their data sets with confidence. Starting with the meaning of statistics, the book introduces measures of central tendency, dispersion, association, sampling methods, probability, inference, designs of experiments and many other subjects of interest in a step-by-step and lucid manner. The relevant theories are described in detail, followed by a broad range of real-world worked-out examples, solved either manually or with the help of statistical packages. In closing, the book also includes a chapter on which statistical packages to use, depending on the user’s respecti...

  20. Turning symptoms into allies: utilization approaches with posttraumatic symptoms.

    Phillips, M

    1993-01-01

    Adult patients with symptoms connected to the trauma of childhood sexual abuse often present in therapy with multiple symptoms and life difficulties and offer a challenge to even the most experienced clinician. In this paper, I describe my work with three such patients who were crippled in different ways by symptoms that had proved resistant to years of various therapeutic interventions. In every case, I accepted and utilized these symptoms as positive resources for successful and rapid change. Patients were then taught self-utilization approaches which allowed them to sustain and extend initial improvements. I conclude that the indirect utilization principle introduced by Milton Erickson provides an effective method to use in approaching some of the more persistent patterns of posttraumatic symptomatology related to childhood sexual abuse.

  1. The Security Concerns of the Baltic States as NATO Allies

    2013-08-01

    national cyber attack on Estonia, apparently mounted from Russia, is another point of friction. In the Baltic States, there are large Russian...results when it is presented as an attrac- tive proposition to the local populations and govern- ments. Soft power backed up by lies, bullying , and...All the 35 Estonians noted that national cyber protection was an important security concern. This is understandable, because in April and May 2007

  2. Fromm and Habermas: Allies for Adult Education and Democracy

    Fleming, Ted

    2012-01-01

    The legacy of the Frankfurt Institute for Social Research has been a powerful force for critically understanding social reality. Erich Fromm was one of the early and best known members of the Institute. Fromm emphasised the centrality of culture and interpersonal relations in the construction of the psyche. The unconscious was not only the…

  3. I. The metabolic properties of plutonium and allied materials

    Hamilton, J.G.

    1948-05-24

    This report on the metabolic properties of plutonium and related radioactive materials presents experimental information in the following areas: radioautographic studies; tracer studies (with tables of accumulation in tissues) of actinium, radio-zirconium, technetium, radio-rubidium, radio-germanium, beryllium, and cadmium; decontamination and bone metabolism studies; and radio-chemical isolation.

  4. LHC Report: stoat-ally back on track!

    Stefano Bertolasi and Mike Lamont for the LHC team

    2016-01-01

    Electrical equipment that was damaged by the beech marten has been repaired. The LHC is back on track with ever higher beam intensity.    Technicians at work on the transformer that was damaged by the beech marten. (Image: Stefano Bertolasi/CERN) Early in the morning of Friday, 29 April, the LHC was running with Stable Beams with 49 bunches per beam. Earlier that week, the scrubbing run had been cut short after a vacuum leak had developed in the SPS beam dump. Following this, the LHC had started its planned intensity ramp-up, albeit with a limited number of bunches per injection from the SPS to avoid overstressing the compromised beam dump. At 05:32:16 on Friday, the beams were dumped. The logbook entry reads “Foreign object (weasel) found on the 66kV transformer in P8, causing severe electrical disturbance throughout the complex”. The weasel, later more accurately identified as a beech marten, had taken out a 66 to 18 kV transformer at Point 8 of th...

  5. Dynamical recrystallization of high purity austenitic stainless steels; Recristallisation dynamique d'aciers inoxydables austenitiques de haute purete

    Gavard, L

    2001-01-01

    The aim of this work is to optimize the performance of structural materials. The elementary mechanisms (strain hardening and dynamical regeneration, germination and growth of new grains) occurring during the hot working of metals and low pile defect energy alloys have been studied for austenitic stainless steels. In particular, the influence of the main experimental parameters (temperature, deformation velocity, initial grain size, impurities amount, deformation way) on the process of discontinuous dynamical recrystallization has been studied. Alloys with composition equal to those of the industrial stainless steel-304L have been fabricated from ultra-pure iron, chromium and nickel. Tests carried out in hot compression and torsion in order to cover a wide range of deformations, deformation velocities and temperatures for two very different deformation ways have allowed to determine the rheological characteristics (sensitivity to the deformation velocity, apparent activation energy) of materials as well as to characterize their microstructural deformations by optical metallography and electron back-scattered diffraction. The influence of the initial grain size and the influence of the purity of the material on the dynamical recrystallization kinetics have been determined. An analytical model for the determination of the apparent mobility of grain boundaries, a semi-analytical model for the dynamical recrystallization and at last an analytical model for the stationary state of dynamical recrystallization are proposed as well as a new criteria for the transition between the refinement state and the state of grain growth. (O.M.)

  6. Welding hot cracking in an austenitic stainless steel; Fissuration a chaud en soudage d'un acier inoxydable austenitique

    Kerrouault, N

    2001-07-01

    The occurrence of hot cracking is linked to several conditions, in particular, the composition of the material and the local strains due to clambering. The aim of this study is to better analyse the implied mechanisms and to lead to a local thermomechanical criterion for hot cracking. The example studied is an AISI 321-type stainless steel (X10CrNiTi18-12) strongly prone to cracking. Two weldability tests are studied: - the first one consists in carrying out a fusion line by the TIG process on a thin sheet. In the case of the defect occurrence, the crack is longitudinal and follows the back of the molten bath. The influence of the operating conditions welding (speed, welding heat input, width test sample) is studied. - the second one is the Varestraint test. It is widely used to evaluate the sensitivity of a material to hot cracking. It consists in loading the material by bending during a fusion line by the TIG process and in characterising the defects quantity (length, number). Various thermal and mechanical instrumentation methods were used. The possibilities of a local instrumentation instrumentation being limited because of the melting, the experimental results were complemented by a numerical modelling whose aim is to simulate the thermomechanical evolution of the loading thanks to the finite element analysis code ABAQUS. First, the heat input for thermal simulation is set by the use of an inverse method in order to optimise the energy deposit mode during welding in the calculation. Then, the mechanical simulation needs the input of a constitutive law that fits the mechanical behaviour over a wide temperature range from ambient to melting temperature. Thus, a mechanical characterization is performed by selecting strain values and strain rates representative of what the material undergoes during the tests. The results come from tensile and compressive tests and allow to settle an elasto-visco-plastic constitutive law over temperatures up to liquidus. Once validated, the thermomechanical simulation brings new interpretations of the tests observations and instrumentation results. The comparison of experimental and numerical results make it possible to determine a thermomechanical welding hot cracking criterion during solidification. This criterion simultaneously considers mechanical (strain and strain rates threshold) and thermal (temperature range, thermal gradient) parameters which give the position and orientation of the first crack initiation. The criterion precision are in good agreement with the observations on the two considered weldability tests. (author)

  7. Numerical modelling of steel arc welding; Modelisation numerique du soudage a l'arc des aciers

    Hamide, M

    2008-07-15

    Welding is a highly used assembly technique. Welding simulation software would give access to residual stresses and information about the weld's microstructure, in order to evaluate the mechanical resistance of a weld. It would also permit to evaluate the process feasibility when complex geometrical components are to be made, and to optimize the welding sequences in order to minimize defects. This work deals with the numerical modelling of arc welding process of steels. After describing the industrial context and the state of art, the models implemented in TransWeld (software developed at CEMEF) are presented. The set of macroscopic equations is followed by a discussion on their numerical implementation. Then, the theory of re-meshing and our adaptive anisotropic re-meshing strategy are explained. Two welding metal addition techniques are investigated and are compared in terms of the joint size and transient temperature and stresses. The accuracy of the finite element model is evaluated based on experimental results and the results of the analytical solution. Comparative analysis between experimental and numerical results allows the assessment of the ability of the numerical code to predict the thermomechanical and metallurgical response of the welded structure. The models limitations and the phenomena identified during this study are finally discussed and permit to define interesting orientations for future developments. (author)

  8. New possibilities of surface treatments for stainless steels;Nouvelles possibilites de traitements superficiels des aciers inoxydables

    Lebrun, J.P. [Lebrun Consulting, 78 - Bougival (France)

    2010-05-15

    How to improve the wear and friction resistances of stainless steels while keeping them their corrosion resistance properties? The cold plasmas technology is a solution. With this technology, it is possible to make the treatment parameters vary independently each other (temperature, gas mixture, pressure...). (O.M.)

  9. Advanced joining techniques for modern lightweight steel construction; Techniques d`assemblage des aciers a haute resistance pour vehicule leger

    Stegemann, T. [Thyssen Stahl AG, Duisburg (Germany); Hahn, O.; Schulte, A. [Paderborn Univ. (Gesamthochschule) (Germany)

    1998-01-01

    New high-strength steel grades in combination with modern joining techniques contribute to optimize properties of the joints. Specially heatless joining techniques improve the fatigue properties of the joints as well as the crash behaviour. Such mechanical joining techniques are clinching and self piercing riveting. But the combined joining techniques e.g., weld bonding, clinching combined with bonding are also effective in the case of high-strength steel sheets. The minor heat input of laser-beam welds can also be used to join high strength steels to stiffer light weight structures. (authors)

  10. Relation microstructure-propriétés mécaniques d'un acier martensitique inoxydable

    Badinier Guillaume

    2013-11-01

    Full Text Available The relationship between microstructure and mechanical properties of MaX (1.4006 martensitic stainless steel has been studied. Optical microscopy was used to characterize the microstructure and the volume fraction of retained ferrite was measured by image analysis. Mechanical properties were measured in uni-axial tensile testing and a composite model has been developed to capture the effect of both the retained ferrite and the carbon content of the martensitic phase. First results show a reasonable correlation between the experimental stress-strain curves and the model. Results are discussed in view of a previous study on plain martensitic carbon steels.

  11. Etude des proprietes mecaniques statiques et dynamiques de pieces d'acier elaborees par metallurgie des poudres

    Bernier, Fabrice

    The main objective of this thesis ais to gain a better understanding of the effects of processing variables on the porosity and microstructure of powder metallurgy (P/M) steel and their effect on mechanical properties, both static and dynamic. The effects of processing variables on porosity and microstructure were evaluated by advanced microstructural characterization using both optical and electron microscopies. Then the impacts of porosity and microstructure on both static and dynamic properties were measured. Static mechanical properties were characterized by hardness measurements and by tensile tests while fatigue testing was used for evaluating dynamic properties. Fractographic observations were made on tensile and fatigue fracture samples to correlate the microstructural features to the mechanical performance of P/M steels. The experimental work covered in this Ph.D. thesis enables to further understand the mechanisms by which process variables affect the microstructure and the mechanical properties of samples. In the first paper, the effect of prealloying MnS up to 1.0 wt pct on the microstructural features of non-metallic inclusions and their impact on tensile and fatigue properties of a 7.0 g/cm3 P/M steel (Fe-2.0Cu-0.7C) have been investigated. As the MnS content increases, larger, more irregular and more closely spaced inclusions are obtained. Whilst no significant impact on both static and dynamic properties was observed when prealloying up to 0.65 wt pct MnS, a decrease of more than 15 pct of the ultimate tensile strength and of the endurance limit was found when the MnS content reaches 1.0 wt pct. The decrease in the ultimate tensile strength is attributed to a lower ductility of the sinternecks, as void initiation and void growth were promoted at lower stress levels by larger inclusions. The larger size of the MnS particles and the lower mean free path between non-metallic inclusions also favor microcrack initiation and their coalescence into cracks, leading to premature fatigue fracture. In the second paper, the improvement of performance that can be achieved by copper infiltration was quantified. Tensile and fatigue properties of a Fe-2.0Cu-0.7C PM steel were compared to the same alloy infiltrated with 8 wt-% copper. Microstructural characterization, using optical and electron microscopies, was carried out to understand the effect of copper infiltration on mechanical properties. Copper infiltration improves the ultimate tensile strength by 40% by increasing the load bearing section, decreasing the stress concentrations associated to open porosity and increasing the hardness of the steel matrix. Fractographic observations show the evidence of stress transmission from the sinternecks to the steel particles due to infiltrated copper. The beneficial effect of copper infiltration is less pronounced for fatigue properties as the endurance limit is increased by only 10%. This lower improvement is explained by crack initiation at the copper/steel matrix interface. In the last paper, the microstructural characterization of nickel rich areas and their influence on the endurance limit of a P/M steel was investigated. The addition of nickel powder to a P/M steel increases hardenability, enabling the formation of martensite directly after the sintering process. However, the slow diffusion rate of nickel into iron leads to the formation of nickel rich areas (NRA). Two steel alloys were studied, the first one is a Fe-6.4Ni-0.7Mo-0.7C with standard size nickel powder additions and the second one is a Fe-2.4-0.7Mo-0.7C where a finer size nickel powder was added. The influence of the size of the nickel powder used on hardenability and on the presence of NRA has been investigated by optical microscopy. A complete identification of the microstructural constituents and the effect of nickel concentration on their presence were achieved using X-ray energy dispersive spectrometry and electron diffraction in the transmission electron microscope. Results obtained by these techniques show the presence of austenite and martensite. Fatigue tests were carried out on P/M steel parts with and without austenitic areas to study their impact on the endurance limit. The analysis of the results showed that these areas are not a governing factor for the endurance limit of sintered steels. (Abstract shortened by UMI.)

  12. Usure d'un acier inoxydable dans l'eau pressurisée à haute température

    Kaczorowski, Damien; Georges, Jean-Mary; Bec, Sandrine; Tonck, André; Vannes, André Bernard; Vernot, Jean-Philippe

    2001-07-01

    The wear behaviour of an austenitic stainless steel is analysed using a tribometer working in pressurised high temperature water (PHTW). The precise contact conditions, low pressure impact and sliding contacts, play an important role on the surface wear in this corrosive medium. The tests which include both impact and sliding are the most severe. The friction films formed during these tests are compared with those obtained with pure oxidation. It is shown that these films participate in the formation of elongated 'indents' observed on the surfaces. Nano-indentation measurements consolidate this hypothesis.

  13. Steels in interaction with liquid metals: a review; L'influence des metaux liquides sur les aciers inoxydables

    Auger, T. [ECP/MSSMAT, UMR CNRS 8579, Grande voie des vignes, 92290 Chatenay-Malabry, (France)

    2011-07-01

    Liquid metals are envisaged for various nuclear applications ranging from spallation neutron sources to future fission and fusion reactors. A fair amount of current research is dedicated to the investigation of the interaction of steels, the only structural materials compatible at long term with liquid metals such as the eutectic lead-bismuth or sodium. The aging problems for these materials are corrosion, wettability and liquid metal induced embrittlement. This review recalls some of the key factors in the understanding of these problems. (authors)

  14. Corrosion des aciers à long terme : propriétés physico-chimiques des hydroxysels ferreux

    Azoulay, Ilanith,

    2013-01-01

    This study deals with various ferrous hydroxysalts formed in carbonated or sulphated environments. These compounds are known to play an important role during the long term corrosion processes of carbon steel in natural media (soils, seawater). Chukanovite, the Fe(II) hydroxycarbonate with composition Fe2(OH)2CO3, was studied more particularly. Its standard Gibbs free energy of formation could be determined via the detailed study of the equilibrium conditions with Fe(II) hydroxide, performed w...

  15. Evaluation of Inhibitors for Corrosion Control of Canadian Forces Ships’ Air Conditioning Hydronic Water Systems.

    1986-10-01

    de fer hydrat6, ce qui causait une perte de rendement, on a d~couvert que certaines pi~ces 6taient en acier doux. La corrosion des pieces en acier ...moyens de limiter la corrosion de pieces en acier dans de l’eau soit riche, soit pauvre en oxyg~ne. ii TABLE OF CONTENTS PAGE ABSTRACT ii LIST OF TABLES

  16. Cajal 间质细胞凋亡在先天性巨结肠症及其同源病发病中的作用%The role of the apoptosis of interstitial cells of cajal in the pathogenesis of hirschsprung’s disease and its allied disorders

    杨晓锋; 李索林; 徐伟立; 李英超; 孙驰

    2016-01-01

    目的:探讨 Cajal 间质细胞(interstitial cells of Cajal,ICCs)凋亡在先天性巨结肠症(Hir-schsprung’s disease,HD)及其同源病(Hirschsprung’s allied disease,HAD)结肠肌层中的表达及作用。方法2014年2月至2015年2月我们采取腹腔镜手术治疗15例 HD 和13例 HAD,切取 HD 痉挛段、移行段及扩张段和 HAD 近端与远端全层肠壁作检验组。另选取10例正常儿结肠标本作对照组。应用免疫荧光双标记技术检测不同病变肠管肌层中 ICCs 分布密度以及 caspase —3、bcl —2表达情况。应用透射电镜观察不同病变肠管肌层中 ICCs 超微结构改变。结果结肠肌层中 ICCs 分布密度(个/视野)在HD 组痉挛段(5.8±1.1)、移行段(10.0±1.8)及扩张段(13.1±2.1)和 HAD 组近端(16.5±2.4)与远端肠段(8.6±1.6),除 HAD 组近端与对照组(17.8±1.5)相比差异无统计学意义(P >0.05)外,其余各组两两比较均存在明显差异(P <0.05);各组中 caspase —3阳性 ICCs 表达率分别为(77.6±13.8)%、(53.6±10.2)%、(31.9±8.0)%、(23.6±6.8)%、(57.2±12.1)%,均明显高于对照组的(6.3±4.3)%(P <0.05);同时各组中 bcl —2阳性 ICCs 表达率分别为(18.3±9.3)%、(31.5±7.3)%、(42.3±7.9)%、(48.7±6.5)%、(38.5±6.7)%,与对照组的(60.3±5.4)%相比均明显降低(P <0.05)。ICCs分布密度与 caspase —3表达呈负相关(r =-0.915,P <0.01)、与 bcl —2表达呈正相关(r =0.754,P <0.01)。电镜观察 HD 组、HAD 组病变肠管均发现 ICCs 凋亡样改变。结论HD、HAD 病变结肠肌层ICCs 分布密度及 caspase —3、bcl —2表达异常,表明 ICCs 细胞凋亡可能在 HD、HAD 的发病中发挥重要作用。%Objetive To explore the expression and role of apoptosis of ICCs in the colon of Hirschs-prung’s Disease(HD)and its

  17. 杏丁联合吡拉西坦注射液改善血管性痴呆患者认知功能的效应%Effect of the xingding allied piracetam injection on improvement of cognitive function in patients with vascular dementia

    陈文武; 田爱兰; 翟蕾; 翟秀玲; 张永利

    2005-01-01

    著改善其认知功能.%BACKGROUND: At present, there are many drugs and therapeutic methods for dementia at home and abroad. Both xingding and piracetam are the kind of improver for circulatory obstruction and protector for nerve cells and can slow down the functional decline of brain tissue and provide improvement for cognitive deficit.OBJECTIVE: To observe the improvement of allied application of xingding and piracetam on cognitive function in treatment of vascular dementia.DESIGNS: Case-controlled study based on patients.SETTING: Neurological Department in Affiliated Hospital of Henan University. PARTICIPANTS: Totally 91 cases of vascular dementia hospitalized in Neurological Department of First Affiliated Hospital of Henan University from October 2000 to March 2002, which were randomized into treatment group of 48 cases and the control of 43 cases.INTERVENTIONS: In treatment group, xingding injection of 20 mL and piracetam of 8 g were administrated and 50 g/L glucose injection 250 mL was added respectively for intravenous injection, once daily and 14 days made one session. In the control, piracetam of 8 g was prescribed with 50 g/L glucose injection 250 mL added for intravenous injection, once daily and 14 days made one session. There was no any difference in other medication treatment. One month later after treatment of two groups, he patients were re-examined with mini-mental state examination(MMSE) and Hasegawa dementia scale(HDS) was used to assess the cogitative improvement and neurological defect scale(NDF) was used to analysis the improvement of neurological functional symptoms.MAIN OUTCOME MEASURES: ① Scores of MMSE, HDS and NDF in two groups. ② Analysis on therapeutic effects.RESULTS: Totally 91 cases entered the analysis on the results. There was no significant difference in MMSE and HDS before treatment in two groups. In treatment group, after treatment, MMSE and HDS scores were (23.26±5.12) and(2.78±3.46) respectively, indicating significant difference(t=4.79, 15.44, P<0

  18. 黑河综合遥感联合试验研究进展:水文与生态参量遥感反演与估算%The Progresses on the Watershed Allied Telemetry Experimental Research (WATER) :Remote Sensing of Key Hydrological and Ecological Parameters

    李新; 刘强; 柳钦火; 王建; 马明国; 肖青; 车涛; 晋锐; 冉有华

    2012-01-01

    This paper reviewed and summarized the progresses on the remote sensing-based inversion and es-timation of hydrological and ecological variables/parameters, within the framework of the Watershed Allied Telemetry Experimental Research (WATER) project. We make progresses in remote sensing of hydrologi- cal variables as follows:The basin-scale precipitation observation with high accuracy are carried out with a truck-mounted dual polarized Doppler radar in the upstream and midstream of the Heihe River basin, ai- ming to obtain the quantitative relationship between the precipitation rate,radar reflectivity and its polari- zation information. The substantial developments and improvements of remote sensing estimation models of evapotranspiration are achieved with the aid of multi-source observations. A retrieval algorithm of snow depth in the mountainous area is developed by using the K and Ka band airborne microwave radiometry. The method to eliminate the influence of surface roughness on soil moisture remote sensing is proposed by using the multi-angles SAR data. We also succeed in the remote sensing estimation of ecological-process variables/parameters as follows.Fine land surface classification method is developed by combining informa- tion from airborne laser radar and high-resolution optical images. The C3/C4 vegetation functional type classification is realized by integrating the vegetation fluorescence under solar light condition extracted from the hyper-spectral airborne remote sensing images,and NDVI information. The methods using multi- angles and multi- spectrums remote sensing information to retrieve the LAI are improved,especially exploi- ting the potential of LiDAR to obtain the vegetation vertical structure, and the scale conversion of remote sensing based LAI is also explored. Other progresses include developing a new method to retrieve light-use efficiency using fluorescence information from hyperspectral data, proposing an inversion model of FPAR taking

  19. Clinical significance of microRNA-21 in gastric cancer patients treated with chemotherapy of allied two medicines containing oxaliplatin%微小RNA-21在含奥沙利铂的二药联合方案治疗晚期胃癌患者中的意义

    周颀; 蒋敬庭; 吴昌平

    2013-01-01

    Objective To investigate the significance of microRNA-21 (miRNA-21,miR-21) expression in gastric cancer and assess the correlation between miRNA-21 and clinical outcome of the latestage gastric cancer patients treated with chemotherapy of allied two medicines containing Oxaliplatin.Methods Metastatic gastric cancer patients who are not candidates for curative surgery or recurred after operation were recruited for the trial.The patients were treated with S-1 plus i.v.with Oxaliplatin or Doxifluridine plus i.v.with Oxaliplatin.The expression of candidate miRNAs was quantified from fifty-two late stage gastric cancer formalin fixed paraffin-embedded (FFPE) specimens.Total RNAs were extracted from normal and gastric tumor specimens.The levels of miRNAs (including let-7g,miR-200c,miR-140,miR-21,miR-192 and miR-181b) were quantified using real time fluorescent quantitative polymerase chain reaction (FQ-PCR) expression analysis.In addition,we will further analyze its clnical significance in gastric cancer.Results The expression of miR-21 was significantly overexpressed in gastric tumors compared to normal gastric tissues (5.43 ± 7.95 vs 1.00).Kaplan-Meier survival analysis revealed that high level of miR-21 expression was closely associated with poor overall survival (OS) for Oxaliplatin based regimens.The median OS of miR-21 low expression patient subgroup was 8.74(6.58-10.89) months,while was only 5.03(2.67-7.40) months for the high expression subgroup,patients with high miR-21 expression showed a significant increase in hazard ratio (HR) for death [HR =8.11,95 % confidence interval (CI):2.47-26.59,P < 0.01].The efficacy after two cycles was also found to be significant variable in predicting OS,the median OS for patients with patial response (PR),stable disease (SD) and progressive diease (PD) were 8.41(5.29-11.52),10.57 (5.68-15.47) and 5.10(3.11-7.08) months respectively.Compared to patients with PR,the HR for death were 0.96 (95% CI:0.36-2.54,P > 0.05) and

  20. Investigation into the Origin of Magnetic Properties of Amorphous Metallic Alloys.

    1981-10-01

    alloys investigated. Rksums-Nous avons trouve que certains verres metalliques etaient fragilises par un recuit a basse temperature, comme certains aciers ...article, nous pr sentons les effets de I’addition de Sb, Sc and Te, qui sont des elements fragilisant des aciers , sur des verres metalliques dont les...les aciers . On augmente l’effect d’un element fragilisant en remplaqant du Ni par du Fe. Nous n’avons pas vu de changement notable du DSC ou des

  1. Handbook of International alloy Compositions and Designations. Volume II. Superalloys

    1978-12-01

    Metallurgie, Paris, France (June 1977) 17 pp. 24. Conditions Generales de Recette et d’emploi des Aciers et Alliages Corroyes Resistant a Chaud Utilises...Company Name and City U C-0193 Uddeholmstahl GmbH, 4010 Hilden, West Germany 0-0020 Ugine, Aciers Electriques de Ugine, (Div. of PUG)13’, Savole...Republic Steel Corporation, Special Metals Div., Massillon, Ohio 44646 C-0020 Ugine, Aciers Electriques de Ugine, (Div. of PUG), Savoie, France (See

  2. Embrittlement of steels for hydrogen transport and storage under high pressure; Fragilisation des aciers destines au transport et au stockage de l'hydrogene sous haute pression

    Jouinot, P.; Gantchenko, V.; Katundi, D. [Institut Superieur de Mecanique de Paris (ISMEP-Sumeca), 93 - Saint-Ouen (France)

    2007-07-01

    This work deals with gaseous hydrogen embrittlement of steels for pipelines having a relatively high mechanical resistance (elasticity limit: 550 MPa, Grade 80). The studied materials come from 5 tube steels batch already used for hydrocarbons transport. Plates have been obtained by continuous casting followed by a hot controlled rolling: the rolling temperature is adjusted for obtaining a strain hardening in order to increase the mechanical resistance of the steel. These materials have been tested under hydrogen pressure and the resistance to hydrogen has been measured for each of them. The results show that the hydrogen embrittlement decreases when the mechanical resistance of the plate (or its hardness) increases. The inclusion state of the different steels has been quantified by images analysis at different depths in the plates. These steels contain only globular oxides or aligned aluminates. The hydrogen embrittlement increases with the amount of the globular oxides (or with the length of the aligned aluminates). Micrographic and fractographic analyses show that even small globular inclusions ({phi}=1 {mu}m) concentrate enough hydrogen to induce a crack in the material or to lead to a crack propagation. In order to estimate the homogeneity of the ferrito-perlitic structure, the thickness of ferrite bands have been measured. The hydrogen embrittlement increases as the thickness of the ferrite bands, that is to say, as the heterogeneity of the structure. Micrographs have shown that the hydrogen cracking is initiated on perlite aggregates; the crack propagates then in ferrite and joins then others perlitic areas. This study shows that relatively resistant steels (Grade 80, elasticity limit: 550 MPa) can be used for manufacturing pipelines submitted to high hydrogen pressure. (O.M.)

  3. Elaboration de revêtements sur acier inoxydable: simulation de la fusion par irradiation laser, caractérisation structurale, mécanique et tribologique.

    Avril, Ludovic

    2003-01-01

    A pulsed Nd-YAG laser is used to irradiate and alloy X30Cr13 stainless steel by surface melting, with incorporation of boron or hexagonal boron nitride (h-BN), and to obtain thick coatings: multiphase borided alloys or metal-ceramic composites. The metallographic analyses allow to determine the thickness for each coating (melting zone) and reveal characteristic solidification microstructures: planar front and cellular dendrites. Optical characteristics of the laser beam are measured: divergen...

  4. Physical and mechanical properties of iron-aluminium (Mn, Si) lightweight steels; Proprietes physiques et mecaniques des aciers alleges fer-aluminium (au Mn-Si)

    Frommeyer, G. [Max-Planck-Institut fuer Eisenforschung GmbH, Duesseldorf (Germany); Drewes, E.J.; Bernhard, E. [Thyssen Krupp Stahl (Germany)

    1999-11-01

    Complete text of publication follows: iron-aluminium alloys containing up to 9 wt-% (18 at-%) Al exhibit promising physical and mechanical properties for the development of high performance light-weight steels for automotive applications and for building constructions, specifically facades. The Fe-Al phase diagram shows on the iron rich side three type of b.c.c. lattices. These are the non ordered A2 and the ordered DO{sub 3} and B2 lattices, which influence strongly the physical and mechanical properties of these alloys. Macro alloying with manganese favours the formation of the austenite phase and decreases the stacking fault energy in combination with additions of silicon. Micro alloying and thermomechanical processing including texture development will improve the plastic anisotropy properties (r-values, {epsilon}{sub 1}/{epsilon}{sub 2}-curves) and the strain hardening exponents. The reduced density, the higher flow stresses and tensile strength combined with extended ductility, and the considerably improved impact strength of these light-weight steels reveal great potential application for stretch and deep drawing operations as well. Regarding these advantages, the newly developed materials will enable further improvements in light-weight constructions with steel. (authors)

  5. Modelling of the plasticity and brittle failure of the irradiated bainitic steels; Modelisation du comportement en plasticite et a rupture des aciers bainitiques irradies

    Nguyen, C.N.

    2010-02-15

    Low alloy steels are used in various equipments of nuclear reactors. Subjected to neutron irradiation produced during the operation of reactors, these materials exhibit significant changes in their microstructure, especially with the formation of radiation defects as interstitial loops, void clusters and precipitates. These defects in interactions with dislocations lead to a hardening and embrittlement which are directly related to the received dose and neutron flux. The plastic behaviour of non-irradiated low alloy bainitic steels has been the object of several modelling based on observations from experiments and atomistic simulations. Some of them result from thesis supported by EDF and CEA, which describe different strategies for the micro-mechanical modelling of brittle failure. Improvements in this work come from the integration of new physical characteristics and the attention paid to the representativeness of the microstructure: whereas realistic microstructures in terms of morphology and crystal orientations have been adopted, a dislocation density based constitutive model in the large deformation framework is used to describe crystal plasticity. This choice is justified by the need to take into account, in the constitutive modelling, the interactions between dislocations and irradiation defects under severe loading conditions. The plasticity laws have been implemented in the finite elements code ZeBuLoN in order to perform computations of polycrystalline aggregates. Such aggregates are representative volume elements. They thus provide the database required for the application of brittle failure models to structures. This multi-scale character confers to the modelling the status of 'micro-mechanical local approach of failure'. (author)

  6. Crack growth in an austenitic stainless steel at high temperature; Propagation de fissure a haute temperature dans un acier inoxydable austenitique

    Polvora, J.P

    1998-12-31

    This study deals with crack propagation at 650 deg C on an austenitic stainless steel referenced by Z2 CND 17-12 (316L(NN)). It is based on an experimental work concerning two different cracked specimens: CT specimens tested at 650 deg C in fatigue, creep and creep-fatigue with load controlled conditions (27 tests), tube specimens containing an internal circumferential crack tested in four points bending with displacement controlled conditions (10 tests). Using the fracture mechanics tools (K, J and C* parameters), the purpose here is to construct a methodology of calculation in order to predict the evolution of a crack with time for each loading condition using a fracture mechanics global approach. For both specimen types, crack growth is monitored by using a specific potential drop technique. In continuous fatigue, a material Paris law at 650 deg C is used to correlate crack growth rate with the stress intensity factor range corrected with a factor U(R) in order to take into account the effects of crack closure and loading ratio R. In pure creep on CT specimens, crack growth rate is correlated to the evolution of the C* parameter (evaluated experimentally) which can be estimated numerically with FEM calculations and analytically by using a simplified method based on a reference stress approach. A modeling of creep fatigue growth rate is obtained from a simple summation of the fatigue contribution and the creep contribution to the total crack growth. Good results are obtained when C* parameter is evaluated from the simplified expression C*{sub s}. Concerning the tube specimens tested in 4 point bending conditions, a simulation based on the actual A 16 French guide procedure proposed at CEA. (authors) 104 refs.

  7. Crack initiation at high temperature on an austenitic stainless steel; Amorcage de fissure a haute temperature dans un acier inoxydable austenitique

    Laiarinandrasana, L.

    1994-11-25

    The study deals with crack initiation at 600 and 650 degrees Celsius, on an austenitic stainless steel referenced by Z2 CND 17 12. The behaviour laws of the studied plate were update in comparison with existing data. Forty tests were carried out on CT specimens, with continuous fatigue with load or displacement controlled, pure creep, pure relaxation, creep-fatigue and creep-relaxation loadings. The practical initiation definition corresponds to a small crack growth of about the grain size. The time necessary for the crack to initiate is predicted with fracture mechanics global and local approaches, with the helps of microstructural observations and finite elements results. An identification of a `Paris`law` for continuous cyclic loading and of a unique correlation between the initiation time and C{sup *}{sub k} for creep tests was established. For the local approach, crack initiation by creep can be interpreted as the reaching of a critical damage level, by using a damage incremental rule. For creep-fatigue tests, crack growth rates at initiation are greater than those of Paris`law for continuous fatigue. A calculation of a transition time between elastic-plastic and creep domains shows that crack initiation can be interpreted whether by providing Paris`law with an acceleration term when the dwell period is less than the transition time, or by calculating a creep contribution which relies on C{sup *}{sub k} parameter when the dwell period and/or the initiation times are greater than the transition time. Creep relaxation tests present crack growth rates at initiation which are less than those for `equivalent` creep-fatigue tests. These crack growth rates when increasing hold time, but also when temperature decreases. Though, for hold times which are important enough and at lower temperature, there is no effect of the dwell period insofar as crack growth rate is equal to continuous fatigue Paris law predicted ones. (Abstract Truncated)

  8. Crystalline plasticity constitutive equations for BCC steel at low temperature; Loi de comportement en plasticite cristalline pour acier a basse temperature

    Monnet, G. [EDF RD, MMC, Avenue des Renardieres, Ecuelles, 77818 Moret-sur-Loing Cedex (France); Vincent, L. [CEA Saclay, DEN, SRMA, 91191 Gif-sur-Yvette Cedex (France)

    2011-07-01

    The prediction of the irradiation-induced evolution of the ductile-fragile transition curve of pressure vessel steels is a major research topic in the nuclear industry. Multi-scale approaches starting from ab initio scale up to macroscopic continuum mechanics are currently investigated through the European project PERFORM60. At the intermediate level of crystal plasticity, several effects need to be described accurately before considering the introduction of irradiation hardening mechanisms, such as the thermal activity of dislocations slip, the different mobilities between screw and edge dislocations at low temperature. These effects should be introduced in a crystal plasticity law used in finite-element simulations of polycrystalline aggregates. Accordingly, a new crystal plasticity law is proposed in this paper based on a critical analysis of previous numerical results obtained with a discrete dislocations dynamics code. (authors)

  9. Contributions a la caracterisation et a l'amelioration de l'usinabilite de pieces d'acier elaborees par metallurgie des poudres

    Boilard, Patrick

    Even though powder metallurgy (P/M) is a near net shape process, a large number of parts still require one or more machining operations during the course of their elaboration and/or their finishing. The main objectives of the work presented in this thesis are centered on the elaboration of blends with enhanced machinability, as well as helping with the definition and in the characterization of the machinability of P/M parts. Enhancing machinability can be done in various ways, through the use of machinability additives and by decreasing the amount of porosity of the parts. These different ways of enhancing machinability have been investigated thoroughly, by systematically planning and preparing series of samples in order to obtain valid and repeatable results leading to meaningful conclusions relevant to the P/M domain. Results obtained during the course of the work are divided into three main chapters: (1) the effect of machining parameters on machinability, (2) the effect of additives on machinability, and (3) the development and the characterization of high density parts obtained by liquid phase sintering. Regarding the effect of machining parameters on machinability, studies were performed on parameters such as rotating speed, feed, tool position and diameter of the tool. Optimal cutting parameters are found for drilling operations performed on a standard FC-0208 blend, for different machinability criteria. Moreover, study of material removal rates shows the sensitivity of the machinability criteria for different machining parameters and indicates that thrust force is more regular than tool wear and slope of the drillability curve in the characterization of machinability. The chapter discussing the effect of various additives on machinability reveals many interesting results. First, work carried out on MoS2 additions reveals the dissociation of this additive and the creation of metallic sulphides (namely CuxS sulphides) when copper is present. Results also show that it is possible to reduce the amount of MoS2 in the blend so as to lower the dimensional change and the cost (blend Mo8A), while enhancing machinability and keeping hardness values within the same range (70 HRB). Second, adding enstatite (MgO·SiO2) permits the observation of the mechanisms occurring with the use of this additive. It is found that the stability of enstatite limits the diffusion of graphite during sintering, leading to the presence of free graphite in the pores, thus enhancing machinability. Furthermore, a lower amount of graphite in the matrix leads to a lower hardness, which is also beneficial to machinability. It is also found that the presence of copper enhances the diffusion of graphite, through the formation of a liquid phase during sintering. With the objective of improving machinability by reaching higher densities, blends were developed for densification through liquid phase sintering. High density samples are obtained (>7.5 g/cm3) for blends prepared with Fe-C-P constituents, namely with 0.5%P and 2.4%C. By systematically studying the effect of different parameters, the importance of the chemical composition (mainly the carbon content) and the importance of the sintering cycle (particularly the cooling rate) are demonstrated. Moreover, various heat treatments studied illustrate the different microstructures achievable for this system, showing various amounts of cementite, pearlite and free graphite. Although the machinability is limited for samples containing large amounts of cementite, it can be greatly improved with very slow cooling, leading to graphitization of the carbon in presence of phosphorus. Adequate control of the sintering cycle on samples made from FGS1625 powder leads to the obtention of high density (≥7.0 g/cm 3) microstructures containing various amounts of pearlite, ferrite and free graphite. Obtaining ferritic microstructures with free graphite designed for very high machinability (tool wear 1600 MPa) is therefore possible. These results show that improvement of machinability through higher densities is limited by microstructure. Indeed, for the studied samples, microstructure is dominant in the determination of machinability, far more important than density, judging by the influence of cementite or of the volume fraction of free graphite on machinability for example. (Abstract shortened by UMI.)

  10. Comportement des poteaux mixtes acier-béton soumis aux sollicitations de type monotone. Étude expérimentale

    Cristina Câmpian

    2006-01-01

    Full Text Available For more than one hundred years the construction system based on steel or composite steel -- concrete frames became one of the more utilized types of building in civil engineering domain. For an optimal dimensioning of the structure, the engineers had to found a compromise between the structural exigency for the resistance, stiffness and ductility, on one side, and architectural exigency on the other side. Three monotonic tests and nine cyclic tests according to ECCS loading procedure were carried out in Cluj Laboratory of Concrete. The tested composite columns of fully encased type were subject to a variable transverse load at one end while keeping a constant value of the axial compression force into them. An analytical interpretation is given for the calculus of column stiffness for the monotonic tests, making a comparation with the latest versions of the Eurocode 4 stiffness formula.

  11. Etude et modelisation du frittage de pieces moulees par injection de poudres metalliques d'acier inoxydable et de superalliage de nickel

    Ste-Marie, Michael

    Stainless Steel and Superalloy parts have been obtained by Maetta metal injection molding process to understand the sintering and to build a model of the shrinkage and the density by DOE after sintering. Maetta process consists of low pressure injection molding; this technology is competitive for medium series and complex geometries. The experimental procedure shows how to reduce the dimensions variability and to optimise the cost and the mechanical properties for the chosen alloys on Maetta equipments. The parts have been injected with a Maetta mixer and pneumatic presses. After that, the binder removal was done by capillary debinding. All sintering have been managed following a design of experiment (DOE) plan. The results of density measured by the Archimede's method and shrinkage were obtained by a regression model as a function of final heating ramp, soaking temperature and time. The simulation predicts experimental results with a relative error of 0,25% on the density and 2,2% for the shrinkage. The model is a good way to begin a complete simulation that regroups all effects on the dimensions of sintered parts for the Maetta process. The effects of the geometry, powder characteristics and debinding step on density and dimensions after sintering are not added in this study. Other studies would be necessary to build a global simulation.

  12. Fatigue-creep of martensitic steels containing 9-12% Cr: behaviour and damage; Fatigue-fluage des aciers martensitiques a 9-12% Cr: comportement et endommagement

    Fournier, B

    2007-09-15

    It is in the framework of the research programs on nuclear reactors (generation IV) that the martensitic steels containing 9-12% Cr are studied by the CEA. Most of the structures for which they are considered will be solicited in fatigue-creep at high temperature (550 C). The aim of this work is to understand and model the cyclic behaviour and the damage of these materials. The proposed modelling are based on detailed observations studies (SEM, TEM, EBSD...). The cyclic softening is attributed to the growth of the microstructure. A micro-mechanical model based on the physical parameters is proposed and leads to encouraging results. The damage results of interactions between fatigue, creep and oxidation. Two main types of damage are revealed. A model of anticipation of service time is proposed and gives very satisfying results. The possible extrapolations are discussed. (O.M.)

  13. Ultrasonic testing of canning tubes in stainless steel of the EL 4 reactor; Controle par ultrasons des tubes de gaine en acier inoxydable du reacteur EL 4

    Prot, A.; Monnier, P. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    From all the methods possible for controlling thin cans the one chosen, for numerous reasons, vas that making use of ultrasonic techniques. A method has been developed which should make it possible to carry out a rapid and efficient industrial control of canning tubes, The reasons for the choice of the ultrasonic method are given in detail, together with the principles of the method and the actual control parameters. In the present state of our research, it should be possible to control at least 50 000 tubes a year. Improvements brought about in the details of the control technique itself should make it possible to increase this rate considerably. (authors) [French] Parmi toutes les methodes possibles de controle des gaines minces, le procede retenu pour de multiples raisons a ete celui faisant appel a la technique des ultrasons. Une methode a ete mise au point qui doit permettre un controle industriel rapide et efficace des tubes de gaine. Sont exposes en detail, les raisons du choix de la methode par ultrasons, les principes de cette methode et les parametres du controle proprement dit. Dans l'etat actuel de nos etudes la cadence devrait permettre le controle de 50000 tubes par an au minimum. Des ameliorations de detail portant sur la technique de controle elle-meme, doivent permettre d'accelerer tres notablement cette cadence. (auteurs)

  14. Microstructural study of thermally aged duplex stainless steel deformation and fracture modes; Etude microstructurale des modes de deformation et de rupture d`un acier austenoferritique vieilli thermiquement

    Verhaeghe, B. [Institut national polytechnique, 38 - Grenoble (France)

    1996-12-31

    The aim of this work is to study the micro mechanisms of deformation and rupture of an austeno ferritic stainless steel (Z 3 CND 22-10 M) with 33 % of ferrite. It is studied after ageing 1 000 h at 400 deg. C and 8 000 h at 350 deg. C and compared to the `as received` state. During ageing the ferritic phase undergoes microstructural evolutions which affects its properties. The two ageing treatments lead to roughly the same level of embrittlement. Microstructural characterisation shows that both phases percolate and exhibit orientation relationships close to Kurdjumov-Sachs ones. Mechanical properties of the steel were characterised for different ageing treatments at room temperature and at 320 deg. C. The interface is particularly strong and ensures the load transfer to ferrite even if this phase contains cleavage cracks. Moreover the interface does not oppose slip transmission which is instead controlled by localised glide in the ferritic phase. If activated slip systems of austenite are common with ferrite, slip transmission from austenite to ferrite indeed occurs through the=e interface. If they are not common, dislocations cross-slip back into the austenite. At 320 deg. C cross-slip occurs even far from the interface. Damage starts by nucleation in ferrite of cleavage cracks which propagate between austenite islands. Crack propagation is controlled by stretching of austenite ligaments. The material breaks by ductile tearing of austenite islands when the crack eventually percolates in the ferritic phase. The ductility of the material can be correctly describer using a simple model that takes into account the tearing-off the ductile-phase. (author). 153 refs.

  15. Study of structural modifications induced by ion implantation in austenitic stainless steel; Etude des modifications structurales induites par implantation ionique dans les aciers austenitiques

    Dudognon, J

    2006-12-15

    Ion implantation in steels, although largely used to improve the properties of use, involves structural modifications of the surface layer, which remain still prone to controversies. Within this context, various elements (N, Ar, Cr, Mo, Ag, Xe and Pb) were implanted (with energies varying from 28 to 280 keV) in a 316LVM austenitic stainless steel. The implanted layer has a thickness limited to 80 nm and a maximum implanted element concentration lower than 10 % at. The analysis of the implanted layer by grazing incidence X ray diffraction highlights deformations of austenite lines, appearance of ferrite and amorphization of the layer. Ferritic phase which appears at the grain boundaries, whatever the implanted element, is formed above a given 'threshold' of energy (produced of fluency by the energy of an ion). The formation of ferrite as well as the amorphization of the implanted layer depends only on energy. In order to understand the deformations of austenite diffraction lines, a simulation model of these lines was elaborated. The model correctly describes the observed deformations (broadening, shift, splitting) with the assumption that the expansion of the austenitic lattice is due to the presence of implanted element and is proportional to the element concentration through a coefficient k'. This coefficient only depends on the element and varies linearly with its radius. (author)

  16. ``Simulation of the testing of cladded steel pieces by focussed ultrasonic transducers``; ``Simulation d`un controle par ultrasons focalises d`une piece d`acier revetue``

    Nadal, J.

    1996-12-31

    The inner surface of vessels of pressurized water reactor is protected from corrosion by a stainless steel cladding hot-layer in many cuts. Therefore, the surface irregularities generate spurious echoes that can either mask or be misinterpreted for echoes from possible defects. Probes are calibrated on a specific reflector (side drilled holes in a steel block). The echo arising from it is used as a reference to quantify echoes measured during an examination. The study aims at simulating echographs of the vessel inspection so as to help the analysis of actual measurements. Three models are developed to compute echoes from cladding surface irregularities, echoes from planar defects and the reference echo, respectively. The radiated field is modelled using the Rayleigh integral, the integration of the incident beam with the cladded surface is treated under Kirchhoffs approximation and the reception of reflected waves involves reciprocity between radiation and reception. An extra physical hypothesis allows a fast algorithm to be developed for simulating the Bscan image obtained by transducer scan. The reference echo is also computed under Kirchhoffs approximation. The field refracted inside the material is modelled by an extension of the Rayleigh integral using the geometrical optics approximation. The model for computing diffracted echoes from crack tips is based upon the Geometric Theory of Diffraction. The model for predicting echoes from cladded surface irregularities has been validated by comparing theoretical predictions with experimental measurements. (author). 48 refs.

  17. Study of stress relief cracking in titanium stabilized austenitic stainless steel; Etude de la fissuration differee par relaxation d'un acier inoxydable austenitique stabilise au titane

    Chabaud-Reytier, M

    1999-07-01

    The heat affected zone (HAZ) of titanium stabilised austenitic stainless steel welds (AISI 321) may exhibit a serious form of intercrystalline cracking during service at high temperature. This type of cracking, called 'stress relief cracking', is known to be due to work hardening but also to ageing: a fine and abundant intragranular Ti(C,N) precipitation appears near the fusion line and modifies the mechanical behaviour of the HAZ. This study aims to better know the accused mechanism and to succeed in estimating the risk of such cracking in welded junctions of 321 stainless steel. To analyse this embrittlement mechanism, and to assess the lifetime of real components, different HAZ are simulated by heat treatments applied to the base material which is submitted to various cold rolling and ageing conditions in order to reproduce the HAZ microstructure. Then, we study the effects of work hardening and ageing on the titanium carbide precipitation, on the mechanical (tensile and creep) behaviour of the resulting material and on its stress relief cracking sensitivity. It is shown that work hardening is the main parameter of the mechanism and that ageing do not favour crack initiation although it leads to titanium carbide precipitation. The role of this precipitation is also discussed. Moreover, a creep damage model is identified by a local approach to fracture. Materials sensitive to stress relief cracking are selected. Then, creep tests are carried out on notched bars in order to quantify the intergranular damage of these different materials; afterwards, these measurements are combined with calculated mechanical fields. Finally, it is shown that the model gives good results to assess crack initiation for a compact tension (CT) specimen during relaxation tests, as well as for a notched tubular specimen tested at 600 deg. C under a steady torque. (author)

  18. Controle sismique d'un batiment en acier de 3 etages a l'echelle 1/3 par amortisseurs elastomeres et contreventements en chevron

    Gauron, Olivier

    This study develops an innovative configuration of seismic natural rubber dampers for multistory low- and medium-rise steel braced frames. The dampers are directly integrated in an horizontal position in the seismic force resisting system of the structure. They are connected in a series with typical chevron brace systems. This control system provides not only additional structural damping to the structure but also a period shift, acting in the same way as a base isolation system. First, the fiber reinforced natural rubber used in the application was tested. It exhibited strong non linear dependance of its equivalent viscoelastic properties related to the shear strain. Then, a 1/3-scale 3-story chevron braced steel frame with and without dampers was considered. The structure was build and placed on the shaking table of the University of Sherbrooke Structures Laboratory. Numerical studies show that the efficiency of the control system reduces strongly the seismic induced forces of the undamped structure without any amplification of displacement or drift. Obtained seismic response reduction levels represent significant safety and economical benefits for the proposed application. Finally, the control system viability is experimentally demonstrated by shaking table tests at different reduced seismic intensities. Non linear behavior of the structure due to non linear behavior of the damping material is highlighted, and the dependance of seismic control performances is shown to be related to seismic intensities. Results allow an extrapolation of the experimental control peformances tending to the numerical results at higher intensities. Key-words : chevron braces, damper, multistory building, natural rubber, seismic control, shaking table.

  19. Behaviour and damage of aged austenitic-ferritic steels: a micro-mechanical approach; Comportement et endommagement des aciers austeno-ferritiques vieillis: une approche micromecanique

    Bugat, St

    2000-12-15

    The austenitic-ferritic steels are used in the PWR primary cooling system. At the running temperature (320 C), they are submitted to a slow aging, which leads to the embrittlement of the ferritic phase. This embrittlement leads to a decrease of the mechanical properties, in particular of the crack resistance of the austenitic-ferritic steels. The damage and rupture of the austenitic-ferritic steels have been approached at the ENSMP by the works of P. Joly (1992) and of L. Devilliers-Guerville (1998). These works have allowed to reveal a damage heterogeneity which induces a strong dispersion on the ductilities and the toughnesses as well as on the scale effects. Modeling including the damage growth kinetics measured experimentally, have allowed to verify these effects. Nevertheless, they do not consider the two-phase character of the material and do not include a physical model of the cleavage cracks growth which appear in the embrittled ferrite. In this study, is proposed a description of the material allowing to treat these aspects while authorizing the structure calculation. In a first part, the material is studied. The use of the ESBD allows to specify the complex morphology of these steels and crystal orientation relations between the two phases. Moreover, it is shown that the two phases keep the same crystal orientation in the zones, called bicrystals, whose size varies between 500 {mu}m and 1 mm. The study of the sliding lines, coupled to the ESBD, allows to specify too the deformation modes of the two phases. At last, tensile and tensile-compression tests at various deformation range are carried out to characterize the macroscopic mechanical behaviour of these materials. Then, a micro-mechanical modeling of the material behaviour is proposed. This one takes into account the three scales identified at the preceding chapter. The first scale, corresponding to the laths is described as a monocrystal whose behaviour includes both an isotropic and a kinematic strain hardening. In the second one, the bicrystal is represented either by a finite element method on a representative pattern or by a phenomenological mean fields model adjusted on the finite element method. The third one, the poly-crystal represents the aggregate of bicrystals, and is modelled by polycrystals classical models. The different parameters of the model are identified on monotonous tensile tests and on tensile-compression tests. The damage is then approached. The experiments show that the cleavage cracks appear preferentially at the intersection of the two gliding bands of the ferrite. These observations lead to propose a Cottrell model to represent the cleavage initiation. This model is then extrapolated in order to take into account the growth kinetics. Then is defined a density of the cleavage cracks for each of the three ferrite cleavage plans. The damage is by consequence anisotropic and can be represented by a damage tensor of the fourth order. An easy coupling model taking into account the damage tensor is proposed. At last, the rupture is represented by the Thomasen criteria. The damage model on the whole is introduced too into the calculation code. (O.M.)

  20. Application of high-strength steel sheets for automobiles in Japan; Utilisation des aciers a haute resistance dans l'industrie automobile au Japon

    Takita, M.; Ohashi, H. [Nippon Steel Corporation (United Kingdom)

    2001-10-01

    In Japan, automobile and steel engineers are working together for automotive body weight reduction. They are focusing on weight reduction from the point of view of both body structure and material. In order to meet the increasingly severe requirements for weight reduction, aiming at the limitation of the fuel consumption, an expansion in the range of application of HSS is vital. To realize further reduction, joint research by steelmakers and automobile manufacturers will become increasingly important. (authors)

  1. Microstructure and embrittlement of VVER 440 reactor pressure vessel steels; Microstructure et fragilisation des aciers de cuve des reacteurs nucleaires VVER 440

    Hennion, A

    1999-03-15

    27 VVER 440 pressurised water reactors operate in former Soviet Union and in Eastern Europe. The pressure vessel, is made of Cr-Mo-V steel. It contains a circumferential arc weld in front of the nuclear core. This weld undergoes a high neutron flux and contains large amounts of copper and phosphorus, elements well known for their embrittlement potency under irradiation. The embrittlement kinetic of the steel is accelerated, reducing the lifetime of the reactor. In order to get informations on the microstructure and mechanical properties of these steels, base metals, HAZ, and weld metals have been characterized. The high amount of phosphorus in weld metals promotes the reverse temper embrittlement that occurs during post-weld heat treatment. The radiation damage structure has been identified by small angle neutron scattering, atomic probe, and transmission electron microscopy. Nanometer-sized clusters of solute atoms, rich in copper with almost the same characteristics as in western pressure vessels steels, and an evolution of the size distribution of vanadium carbides, which are present on dislocation structure, are observed. These defects disappear during post-irradiation tempering. As in western steels, the embrittlement is due to both hardening and reduction of interphase cohesion. The radiation damage specificity of VVER steels arises from their high amount of phosphorus and from their significant density of fine vanadium carbides. (author)

  2. NATO Allied Joint Medical Publication 7: Allied Joint Medical Doctrine for Support to Chemical, Biological, Radiological, and Nuclear (CBRN) Defensive Operations, Final Draft

    2014-07-31

    electronic, mechanical , photo-copying, recording or otherwise, without the prior permission of the publisher. With the exception of commercial sales, this...would potentially require a large and readily accessible antidote supply. Procedures for obtaining these antidotes must be well established. For...prophylaxis/pre-treatment medications as needed, emergency antidotes , an individual decontamination kit, and a first aid kit. 2. IPE commonly used by

  3. Radio-oxidation of an EPDM elastomer under weak or strong ionising radiations: measurement and modelling of dioxygen consumption; Radio-oxydation d'un elastomere de type EPDM lors d'irradiations faiblement ou fortement ionisantes: mesure et modelisation de la consommation de dioxygene

    Dely, N

    2005-10-15

    Usually, the irradiation of polymers under ionising radiations occurs in air that is in the presence of oxygen. This leads to a radio oxidation process and to oxygen consumption. Our material is an EPDM elastomer (ethylene propylene 1,4 hexadiene) used as insulator in control-command cables in nuclear plants (Pressurised Water Reactor). A specific device has been conceived and built up during this PhD work for measuring very small oxygen consumptions with an accuracy of around 10%. Ionising radiations used are electrons at 1 MeV and carbon ions at 11 MeV per nucleon. Under both electron and ion irradiations, the influence of oxygen pressure on oxygen consumption has been studied in a very large range: between 1 and 200 mbar. In both cases, the yield of oxygen consumption is constant in-between 200 and 5 mbar. Then, at lower pressures, it decreases appreciably. On the other hand, the oxygen consumption during ion irradiation is four times smaller than during electron irradiation. This emphasizes the role of the heterogeneity of the energy deposition at a nano-metric scale. The adjustment of the experimental results obtained during electron irradiation with the general homogeneous steady-state kinetic model has allowed extracting all the values of the kinetic parameters for the chosen mechanism of radio oxidation. The knowledge of these numbers will allow us to face our results obtained during ion irradiation with a heterogeneous kinetic model under development. (author)

  4. Nuclear structure of weakly bound radioactive nuclei through elastic and and inelastic scattering on proton. Impacts of the couplings induced by these exotic nuclei on direct reactions; Structure de noyaux radioactifs faiblement lies par diffusions elastiques et inelastiques sur proton. Effets des couplages induits par ces noyaux exotiques sur les reactions directes

    Lapoux, V

    2005-09-15

    Information on the structure, spectroscopy and target interaction potentials of exotic nuclei can be inferred by interpreting measured data from direct reactions on proton such as elastic or inelastic scattering of proton (p,p') or one-nucleon transfer reaction (p,d). A series of experimental results has been obtained at the GANIL facilities on the setting composed of the MUST telescope array used for the detection of light charged-particles and of CATS beam detectors. This setting aims at measuring reactions on light proton or deuteron targets through reverse kinematics. Particularly, results on C{sup 10}, C{sup 11} and on direct reactions with the He{sup 8} beam of Spiral are presented. The first chapter is dedicated to the description of the most important theories concerning the nucleus. The experimental tools used to probe the nucleus are reported in the second chapter. The third and fourth chapters present the framework that has allowed us to analyse results from (p,p') and (p,d) reactions on weakly bound exotic nuclei. The last chapter is dedicated to the description of future experimental programs. (A.C.)

  5. Spectroscopie photoassociative des états moléculaires faiblement liés du rubidium :
    Analyse par la méthode de Lu-Fano.
    Étude de la réalisation d'une lentille à atomes.

    2007-01-01

    This thesis is composed of two parts. The first part presents the study of the realization of a lens for atoms using the dipolar interaction. A theoretical study suggests several possible experimental sequences allowing the realization of an achromatic lens with a controllable magnification. Attempts at realizing the sequence highlighted atom losses induced by the laser. The process of photoassociation, strongly probable under the experimental conditions, is responsible of these losses. The s...

  6. The Trends in Admission Variables through the Class of 1990.

    1987-03-31

    College Board scores and High School Rank (CEER) or American College Test program scores and HSR ( ACIER ). If both are available, the higher of the two...and cadets evaluated using ACIER scores. Table 3 shows the distribution, at 50 point intervals, of Whole Candidate Score components for cadets in the

  7. Manual on the Fatigue of Structures. II. Causes and Prevention of Damage. 7. Mechanical Surface Damage,

    1981-06-01

    conjuguee du frottement et de la corrosion sur les aciers inoxydables. Corrosion, Vol.19, N°4, pp. 159-170, June July 1971. Archiv. Eisenhüttenwesen, Vol...24, (1/2), p.43. 1953. Contribution ä l’etude de (’Influence de la deformation plastiquc sur la corrosion des aciers dans des solutions sulfurique

  8. Cultur(ally) Jammed: Culture Jams as a Form of Culturally Responsive Teaching

    Martinez, Ulyssa

    2012-01-01

    Does the person become the name or does the name become the person? This question was asked by a participant of my culture jam entitled, "What's my name?" In this culture jam, I asked people to discern the name of a person based solely on their appearance and a list of possible names below their picture. This article aims to show how culture jams…

  9. Oxytocin-Motivated Ally Selection is Moderated by Fetal Testosterone Exposure and Empathic Concern

    Mariska Esther Kret

    2013-01-01

    Full Text Available In humans, the hypothalamic neuropeptide oxytocin shifts the individual’s focus on self-interest towards group-serving cognitions and decision making. Here we examine this general tendency in the context of group formation, where individuals included into their group (or not 18 targets morphed as having low or high-threat potential (with high-threat targets being beneficial to group-interests but potentially hurting the recruiter’s self-interest. Ninety healthy males self-administered oxytocin or placebo in a randomized double-blind, placebo-controlled study design, had their hands scanned to derive fetal testosterone vs. estradiol exposure from their 2D:4D ratio, and self-reported on their chronic empathic concern. Multilevel regression models revealed that when given oxytocin rather than placebo, individuals with low fetal testosterone priming included low-threat targets more and high-threat targets (somewhat less. Individuals with high fetal testosterone (i.e., low estradiol exposure, however, included high-threat targets more, and low-threat targets less when given oxytocin rather than placebo. Second, when given oxytocin rather than placebo, individuals with low empathic concern included low-threat targets more and high-threat targets less. Individuals with high empathic concern, however, included high-threat targets more, and low-threat targets less when given oxytocin rather than placebo. We conclude that oxytocin shifts the individual’s focus from self to group-serving cognition and decision making, and that these tendencies are stronger for males with high rather than low fetal testosterone exposure, and high rather than low empathic concern. Implications and avenues for future research are discussed.

  10. Allied against reform: pharmaceutical industry-academic physician relations in the United States, 1945-1970.

    Tobbell, Dominique A

    2008-01-01

    During the 1960s, the drug industry was the subject of two congressional investigations into its business practices and pricing policies, and in 1962, passage of the Drug Amendments mandated greater Food and Drug Administration authority over pharmaceutical development. In this article, I examine the industry's efforts to circumvent these political challenges by drawing on its longstanding relationship with academic physicians and the American Medical Association. Using the medical profession's shared concern about expanding government oversight over therapeutic practice, the industry called on academic physicians to join forces with it and establish an expert advisory body to guide government officials on pharmaceutical policy. Drawing on research in the archives of the University of Pennsylvania and the National Academy of Sciences and a careful reading of the trade and biomedical literature and congressional documents, I argue that by positioning themselves as pharmaceutical experts, the members of this industry-academic alliance gave industry a seat at the policy table and enabled it to challenge the efforts of pharmaceutical reformers to further increase the government's role in drug development.

  11. Use of Shadowing-Based Learning in an Allied Health Microbiology Course

    Alex A. Lowrey

    2016-05-01

    Full Text Available Students in an undergraduate microbiology course for health professions majors perform a shadowing-based learning exercise for their course project. Students accomplish this by shadowing a health care professional of their choice, specifically incorporating basic microbiological concept themes into their observations. These concept themes include the biological nature, health effects, detection, and control of microorganisms. Upon completion of the shadowing experience, students present a concise report, which is graded on how well the students connect course scientific concepts with actual clinical practice.

  12. Activists, Allies, and Racists: Helping Teachers Address Racism through Picture Books

    Lazar, Althier M.; Offenberg, Robert M.

    2011-01-01

    Teachers often resist discussions about racism in the classroom, yet it is a topic that is frequently addressed in multicultural literature. This study examines teachers in a graduate reading program (N = 58) who used picture books reflecting African American heritage with elementary school children in a summer reading practicum. Prior to teaching…

  13. Representing Lithuania's strongest ally / Anne E. Derse ; interviewed by Rokas M. Tracevskis

    Derse, Anne E., 1954-

    2011-01-01

    USA suursaadik Leedus räägib, et USA kavatseb kontrollida Mihhail Golovatovi juhtumiga tegeleva komisjoni tööd, rõhutab, et president Barack Obama tahab investeerida haridusse ja et USA-Leedu suhetes on julgeolekul tähtis osa. Leedu kogukonnast Ameerika Ühendriikides

  14. ALLIED MILITARY CURRENCY OF THE SECOND WORLD WAR; A STUDY IN EMERGENCY PAPER MONEY

    Ian Van der Waag

    2012-02-01

    Full Text Available Paper money originated in times when gold and silver coinage were in short supply and therefore, in a sense, all paper money is a substitute for specie. However, there have been circumstances when even the supply of paper money was inadequate. On such occasions various forms of emergency money have made their appearance.

  15. Preparing LGBTQ-Allies and Combating Homophobia in a U. S. Teacher Education Program

    Clark, Caroline T.

    2010-01-01

    Interns in a US teacher education program were surveyed regarding their attitudes towards diversity, particularly issues of sexuality, their feelings of "cultural competence" around diversity, and the repertoires of practices and resources they feel prepared to draw on in their work with middle and high schools students (11-18 year olds). Analysis…

  16. 78 FR 77597 - Safety Zone; Allied PRA-Solid Works, San Diego Bay; San Diego, CA

    2013-12-24

    ... authority under section 4(a) of the Administrative Procedure Act (APA) (5 U.S.C. 553(b)). This provision... follows: PART 165--REGULATED NAVIGATION AREAS AND LIMITED ACCESS AREAS 0 1. The authority citation...

  17. Thermal Stress Analysis of Welded Joint in 1420 Al-Li Alloy Induced by Thermal Cycling

    Hongbin GENG; Song HE; Dezhuang YANG

    2003-01-01

    A model of double grains under plane stress state has been established. According to the double grain model, thermal stress induced by thermal cycling in welding fusion zone is numerically simulated by finite element method, and the microstructures before

  18. Tin (Sn) - An Unlikely Ally to Extend Moore's Law for Silicon CMOS?

    Hussain, Aftab M.

    2012-12-01

    There has been an exponential increase in the performance of silicon based semiconductor devices in the past few decades. This improvement has mainly been due to dimensional scaling of the MOSFET. However, physical constraints limit the continued growth in device performance. To overcome this problem, novel channel materials are being developed to enhance carrier mobility and hence increase device performance. This work explores a novel semiconducting alloy - Silicon-tin (SiSn) as a channel material for CMOS applications. For the first time ever, MOS devices using SiSn as channel material have been demonstrated. A low cost, scalable and manufacturable process for obtaining SiSn by diffusion of Sn into silicon has also been explored. The channel material thus obtained is electrically characterized by fabricating MOSCAPs and Mesa-shaped MOSFETs. The SiSn devices have been compared to similar devices fabricated using silicon as channel material.

  19. Engaging Allied-Health Students with Virtual Learning Environment Using Course Management System Tutorial Site

    Andrew Nguyen; Mangala Tawde

    2013-01-01

    Human Anatomy and Physiology I and II are major gateway courses into nursing and other health related sciences careers.  Being a New York City community college, the students at Queensborough Community College are highly diverse not only in their ethnic and cultural background, but also in the levels of preparedness. When they take Human Anatomy-Physiology I as the first pre-requisite class, many are either freshman or returning students after a hiatus. Many students lack formal training in S...

  20. LIFE CYCLE DESIGN FRAMEWORK AND DEMONSTRATION PROJECTS - PROFILES OF AT&T AND ALLIED SIGNAL

    This document offers guidance and practical experience for integrating environmental considerations into product system development. Life cycle design seeks to minimize the environmental burden associated with a product's life cycle from raw materials acquisition through manufact...