LANDSAT (ERTS) used as a basis for geological volcanological mapping in the central Andes

LANDSAT images of the central Andes (N-Chile, W-Bolivia) were effectively used for volcanological mapping of an area about 160,000 km. The map shown exhibits more and better details than the older small scale geological maps of that area. Even on a scale of 1:1,000,000 details greater than 200 m in size are recognizable. The interpretation of LANDSAT images makes it possible to establish relative age sequences of strato-volcanoes. Finally, the images will also be helpful in prospecting for mineral deposits and geothermal sources

Free and open source software in computing education

Free and Open Source Software (FOSS) exemplifies the merit and successes of open content, understood broadly as creative work that explicitly allows sharing and further changes by anyone, whether an individual or organization. Although the benefits of improving computing education with open source practices are largely acknowledged, transforming teaching to create effective learning environments has many challenges. The panelists will bring different perspectives on teaching strategies and curricular content they have used in their classrooms. These perspectives will exemplify key issues with FOSS-based education and FOSS-based IT systems. The developer and user communities established around FOSS-based IT systems are of particular interest to the IT discipline because of its focus on user centeredness and advocacy for advancing professional practices in authentic environments

Enhanced thermal emittance of space radiators by ion-discharge chamber texturing

The discharge chamber of a 30-cm argon ion source was successfully used to texture potential space radiator materials for the purpose of obtaining values of thermal emittance greater than 0.85 at 700 and 900 K. Some samples were also treated in acid prior to texturing. To evaluate the durability of the textured materials to atomic oxygen, samples were exposed to an RF air plasma environment. The spectral emittance between 2.0 anf 15.0 microns was measured before and after the textured materials were exposed to the plasma asher. The results indicate that copper with extremely high values of emittance after texturing (0.978 and 0.983) at 700 and 900 K, respectively,did not change its values of emittance after ashing, whereas the emittance of stainless steel fell below 0.85 after ashing. These data, along with scanning electron photomicrographs, and the results of texturing and ashing titanium and Nb(1)Zr are presented

Ion beam treatment of potential space materials at the NASA Lewis Research Center

Ion source systems in different configurations, have been used to generate unique morphologies for several NASA space applications. The discharge chamber of a 30 cm ion source was successfully used to texture potential space radiator materials for the purpose of obtaining values of thermal emittance greater than 0.85 at 700 and 900 K. High absorptance surfaces were obtained using ion beam seed texturing, for space radiator materials that were flown on the Long Duration Exposure Facility (LDEF) for 5.8 years in space. An ion source discharge chamber was also used to develop electrode surfaces with suppressed secondary electron emission characteristics for use in collectors in microwave amplifier traveling wave tubes. This was accomplished by sputtering textured carbon onto copper as well as texturing copper using tantalum and molybdenum as sacrificial texture inducing seeding materials. In a third configuration, a dual ion beam system was used to generate high transmittance diamondlike carbon (DLC) films

Global expansion of the Physician Assistant profession: healthcare system needs, scope of practice and future directions

BACKGROUND: The World Health Organization predicts that by 2030 there will be a shortage of more than 14 million healthcare workers. Fifty years ago, to help address the growing demand for medical providers, the United States created a new medical profession, the Physician Assistant. Since 2000, several other countries including Australia, Canada, Germany, Great Britain, India, Israel, Ireland, New Zealand, Saudi Arabia, Scotland, South Africa, and The Netherlands have developed or are developing their own PA-like profession. LITERATURE REVIEW FINDINGS: This thesis contains a comprehensive literature review, composed largely of small pilot and qualitative studies, which summarizes the introduction and expansion of the PA profession in each country. The literature review highlights that around the globe the PA profession is unified by similar condensed medical education and training. However, there is presently a lack of literature on the current roles and tasks of PAs in each country. PROPOSED PROJECT: This thesis proposes a qualitative study to identify each country’s motivation for PA professional development, current scope of practice of PAs and future directions for the PA profession. CONCLUSIONS: The results will be analyzed to reveal correlations, as well as unifying themes and characteristics that are shared among all PAs globally. SIGNIFICANCE: The compiled data will illuminate an emerging profession that is helping to alleviate the healthcare workforce shortage

The emittance of space radiator materials measured at elevated temperatures

The spectral emittances of textured space radiator materials between 1.7 and 14.7 micrometer have been evaluated at room temperature and elevated temperature (630 C) in air. Heating in air caused a permanent increase in spectral emittance for all materials tested: HCl/ion beam textured 304 stainless steel, untextured Ti (6 percent Al, 4 percent V), and sandblasted Ti (6 percent Al, 4 percent V). Changes in the surface chemistry and/or surface morphology of these materials were also observed. Elevated temperature spectral emittance was measured in an argon atmosphere and compared to the measurements in air. Similarity between the room temperature and elevated temperature spectral emittance measurements was also investigated, and limited agreement was found

Think-Aloud Protocol Analysis in Translation Studies

Think-Aloud Protocol Analysis in Translation Studies: This paper reports on think-aloud protocol (TAP) research in Finland and Germany. It discusses some methodological issues: choice of subjects, TAPs in a language-learning and in a professional context, monologue and dialogue protocols, the use of models provided by psycholinguistics. Two types of processes - successful and less successful ones - are distinguished and specified as to the subjects' comprehension and reverbalisation processes, their focus of attention, decision-making, monitoring, flexibility, creative thinking and attitude toward the task. Some tentative results of the research going on in Germany and Finland are presented. The results are expected to serve as hypotheses for the teaching of translation.L'analyse par « Think-Aloud Protocol » en traductologie — Cet article rend compte d'une recherche en traduction menée en Finlande et en Allemagne selon le protocole de l'analyse « à haute voix » (TAP). Il aborde certains points de méthode : le choix des sujets, les TAP en apprentissage des langues et en contexte professionnel, les protocoles par monologue et par dialogue, l'utilisation de modèles issus de la psycholinguistique. On distingue deux types de processus - certains réussissant mieux que d'autres - du point de vue de la compréhension et de la reverbalisation des sujets, du point de vue de la focalisation de l'attention, de la prise de décision, du contrôle, de la souplesse, de la pensée créatrice et de l'attitude face au travail. Sont présentés certains résultats provisoires de la recherche menée en Allemagne et en Finlande. Ces résultats sont susceptibles de servir d'hypothèses en didactique de la traduction