Nano-micro structured superhydrophobic zinc coating on steel for prevention of corrosion and ice adhesion

Thin films of zinc have been deposited on steel substrates by electrodeposition process and further functionalized with ultra-thin films of commercial silicone rubber, in order to obtain superhydrophobic properties. Morphological feature, by scanning electron microscope (SEM), shows that the electrodeposited zinc films are composed of micro-nano rough patterns. Furthermore, chemical compositions of these films have been analyzed by X-ray diffraction (XRD) and infra-red (IRRAS). An optimum electrodeposition condition, based on electrical potential and deposition time, has been obtained which provides superhydrophobic properties with a water contact angle of 155 ± 1°. The corrosion resistance properties, in artificial seawater, of the superhydrophobic zinc coated steel are found to be superior to bare steel. Similarly, the measured ice adhesion strength on superhydrophobic surfaces, using the centrifugal adhesion test (CAT), is found to be 6.3 times lower as compared to bare steel. This coating has promising applications in offshore environment, to mitigate corrosion and reduce ice adhesion

Bibliothèque : faire société (La)

Rencontre organisée à l\u27enssib les 25 et 26 juin 2012 dans le cadre des Estivales. Thématiques du 25 juin : Bibliothèque, création et mémoire Thématiques du 26 juin : Bibliothèque, éducation et politique Comme l’école, après l’école, la bibliothèque peut être un instrument de connaissance du passé, d’analyse du présent et de construction de l’avenir. Qu’est-ce qui rend ce projet possible, légitime, nécessaire ? En quoi la bibliothèque et, plus généralement, les instances de partage du savoir et les institutions culturelles permettent d’être « parmi les hommes » ? Comment, inscrites dans l’épaisseur du temps, elles se nourrissent nécessairement de mémoire et d’histoire ? En quoi elles peuvent/doivent contribuer à la reconstruction d’un espace public, d’un débat public ? Quelle ambition politique, quel projet démocratique peuvent trouver un ancrage une assise, dans ces institutions et fonder leur raison d’être ? A travers ce colloque et ses intervenants, l’enssib a souhaité interroger quelques-unes de ses convictions et de ses exigences : la curiosité intellectuelle, la liberté de l’esprit, la mémoire partagée, la passion de la chose publique, le rôle politique de la bibliothèque. Une éthique de la bibliothèque

Mobilites moleculaires et plasticite dans les reseaux polyesters insatures

SIGLEINIST T 71531 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Mémorisation intentionnelle : différents types d'organisation des conduites observées entre 3 et 7 ans

128 children (from 3 to 7 year -old) served as subjects in two experiments designed to describe the gradual emergency of deliberate memorisation strategies. A set of pictures was presented and the children, knowing that only a definite subset was to be recalled later, freely studied the items. Four types of behavior were observed : 1 1 Children wait for the recall test, without looking at the pictures. 21 Children display the whole set on the table and look at all pictures, whether they belong to the subset or not. 31 Children share the pictures in two subsets but look at both. 41 Children pay attention only to the to-be- remembered items, watching them carefully, naming them etc., while quickly discarding the irrelevant. Only 3 year olds use the first one, 4 to 6 year olds use mostly the intermediate strategies and only at age 7 does the 4th strategy noticeably appear. These results are discussed and related to the task analysis we proposed in terms of goal and sub -goals coordination.Nous avons étudié l'émergence de stratégies de mémorisation intentionnelle auprès de 128 enfants âgés de 3 à 7 ans. Un ensemble d'images est présenté et les enfants, sachant que seul un sous-ensemble devra être rappelé plus tard, étudient librement le matériel. Quatre types de conduite ont été observés : II Les enfants se bornent à attendre le test de rappel sans étudier les images ; 21 Toutes les images sont étalées sur la table, et l'enfant les regarde sans faire de distinction entre les items à rappeler et les autres ; 31 Les images sont réparties en deux sous- ensembles (les images à rappeler, et les autres) que l'enfant regarde tous deux ; 41 Seules les images à rappeler sont regardées, dénommées... Les autres sont mises de côté. Seuls les enfants de 3 ans utilisent la première stratégie, ceux de 4 à 6 ans utilisent les deux stratégies intermédiaires et c'est seulement à l'âge de 7 ans que la quatrième stratégie apparaît assez fréquemment. Ces résultats swu discutés et mis en relation avec l'analyse de la tâche en termes de coordination de but et de sous-buts que nous proposons.Melot Anne-Marie, Corroyer O. Mémorisation intentionnelle : différents types d'organisation des conduites observées entre 3 et 7 ans. In: Enfance, tome 35, n°1-2, 1982. Stratégies de l'enfant et activités finalisées, sous la direction de Gaby Netchine-Grynberg. pp. 49-60

Use of the International Consultation on Incontinence Questionnaire-Urinary Incontinence-Short Form (ICIQ-UI-SF) for an objective assessment of disability determination according to the Modified Katz Scale: a prospective longitudinal study.

The aim of this study was to demonstrate that the International Consultation on Incontinence Questionnaire-Urinary Incontinence-Short Form (ICIQ-UI-SF) tool can be applied for a factual score determining urinary incontinence in the Katz-6 Scale, and it is effective to identify score 2 from score 3.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Prolonged antihypertensive effect of amlodipine: a prospective double-blind randomized study.

Amlodipine is a calcium antagonist with a long elimination half-life (35 to 50 h) allowing a once daily dosing in the treatment of hypertension. This randomized, double-blind study was performed to assess the residual antihypertensive effect of amlodipine 5 mg O.D. 3 days after discontinuing therapy in previously well-controlled mild to moderate hypertensive patients. Blood pressure (BP) was evaluated by conventional (OBP) and by ambulatory blood pressure monitoring (ABPM). Amlodipine 5 mg OD administered during a 6-week period, significantly reduced both OBP and ABPM mean values (p < 0.05), whereas no change in heart rate was observed. At the end of the active treatment period, adequately controlled patients were randomized either to amlodipine 5 mg OD (group A) or amlodipine for 12 days followed by a 3-day period on placebo. After this double-blind treatment phase, group P exhibited no significant increase in BP (assessed by OBP or ABPM) when compared to group A. In conclusion, the duration of action of amlodipine extends largely beyond the 24-h span, and when patients omit their treatment for 3 days BP does not significantly increase.Clinical TrialJournal ArticleMulticenter StudyRandomized Controlled TrialSCOPUS: ar.jinfo:eu-repo/semantics/publishe

Acute pulmonary embolism: Relationships between ground-glass opacification at thin-section CT and hemodynamics in pigs

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Hydrostatic strength of hollow glass microspheres composites: influencing factors and modeling

This study deals with the hydrostatic strength of hollow glass microspheres composites, commonly known as syntactic foams, using model materials made of 0.15 g/cm3 microspheres with 3 types of matrix, two epoxies and one paraffin. More than 100 model material samples are characterized for that work. The hydrostatic strength of these composite materials is determined in a pressure vessel, which can go up to 100 MPa. Two major parameters are studied: stiffness of the matrix and microsphere volume content within the composite material. The results clearly show that the hydrostatic strength of the syntactic foam can be improved by an increase in matrix stiffness or a reduction in microspheres content. Based on experimental data an empirical model with two parameters is proposed to describe the hydrostatic strength of syntactic foam. The relevance of the model is discussed