The use of social network analysis by school librarians to evaluate and improve collaborative networks in their secondary schools: a pilot study

Thesis (Ph.D.) University of Alaska Fairbanks, 2018Social capital, in the form of relationships among teachers, results in sharing information and resources, which leads to improved student academic achievement. As schools continue to seek out ways to improve performance, social capital is often overlooked in favor of development of human capital in the form of professional development and training. Schools that have implemented collaborative groups have the potential to increase social capital, but often fail to structure the groups intentionally or evaluate their outcomes. School librarians in secondary schools often face challenges when it comes to collaboration. The job of a school librarian is inherently collaborative. To effectively serve the school's population, school librarians must understand the needs of their community. To teach information literacy skills, they must have access to students, typically via classroom teachers. Not surprisingly, collaboration between teachers and librarians is a major focus of both professional and research literature, yet librarians report it is one of their biggest challenges. Librarians are urged to start small, work with the teachers who are willing, and hope that others in the school will see the value of collaboration; in other words, build it and they will come. This research sought to determine if school librarians could use social network analysis as an evaluative and strategic planning tool. This study used a mixed-methods approach in a three-phase process to collect social network survey data in two secondary schools, develop the Social Network Analysis for School Librarians (SNASL) Process, and pilot test the process with the school librarians in the pilot schools using participatory analysis. Analysis revealed that the SNASL Process has the potential to enable school librarians to evaluate and improve upon the collaborative network of their school by identifying individuals in specific role positions and producing generative insight regarding the structure of the school network

Aprender la ciudad: relacionar sus espacios, conectar sus usuarios

1 archivo PDF (Tipo: Presentación) : principalmente ilustraciones en color ; 44 diapositivas. DUODECI

"El agua urbana, protagonista del futuro de las ciudades"

1 archivo PDF (Tipo: Presentación) : principalmente ilustraciones en color ; 75 diapositivas. SUIUNDECIMA lo largo de la historia de la ciudad, y en particular de la ciudad europea, por muchos siglos, la presencia de los elementos naturales dentro el contexto urbano siempre ha sido muy importante, consiguiendo tener un protagonismo que se explicaba tan por sus valores concretos, funcionales, como por sus sentidos emblematicos, simbolicos, representativos

Bilbao-Zorrotzaurre: Una isla creativa para consolidar e innovar la política de centralidad de la intervención cultural en Bilbao [presentación]

La presentación se desarrolla en los siguientes contenidos: Bilbao: un marco urbano de intensa vitalidad; La capacidad de una ciudad de recuperarse y crear inéditos escenarios; El “caso Guggenheim” después de 20 años de actividad (1997-2017); El desafío de Zorrotzaurre, como “isla creativa”; La crisis de las áreas industriales metropolitanas en los años setenta afecta tanto a las ciudades europeas como a las norteamericanas. El factor desencadenante de este declive es la crisis en los sectores industriales tradicionales (acero, construcción naval, textiles, automóviles, etc.), junto con un desarrollo insuficiente del sector de servicios

Untersuchung der prozessabhängigen Ladungsträgerrekombination an Versetzungen in Siliziumsolarzellen

Die Dissertation demonstriert ein Verfahren zur Messung der normalisierten Rekombinationsstärke (Gamma) von Versetzungen in blockerstarrten Siliziumsolarzellen. Es basiert auf der topografischen Messung der internen Quanteneffizienz IQE und der Versetzungsdichte. Unter Verwendung des theoretischen Modells von Donolato und Simulationen mit dem Programm PC1D werden für einzelne Versetzungscluster aus dem gemessenen Zusammenhang zwischen der IQE und der Versetzungsdichte die Gamma-Werte bestimmt. Zur Messung der Versetzungsdichte wurden neue Methoden der automatischen Bildanalyse zur Erkennung von angeätzten Kristalldefekten mit dem Computer entwickelt. Die in den Solarzellen gemessenen Gamma-Werte variieren über ca. eine Größenordnung innerhalb weniger Millimeter. Regelmäßig angeordnete Versetzungen haben kleinere Gamma-Werte gegenüber ungeordneteren Verteilungen. Der Gamma-Wert korreliert signifikant mit den Prozesstemperaturen bei der Solarzellherstellung. Es wird gezeigt, in welcher Weise eine Remote-Plasma-Wasserstoffpassivierung die lokale IQE und die Gamma-Werte beeinflusst

Toward a balanced relationship city-port : a strategic choice for the economy of the port and the quality of environment and urban life

1 archivo PDF (Tipo: Presentación) : principalmente ilustraciones en color ; 87 diapositivas.Se expone la importancia de la relación puerto y ciudad en escalas: global, regional y urbano, en las fases: integración, separación, conflicto y nueva integración los desafíos y recomendaciones. SUINOVE

Dissolution and gettering of iron during contact co-firing

The dissolution and gettering of iron is studied during the final fabrication step of multicrystalline silicon solar cells, the co-firing step, through simulations and experiments. The post-processed interstitial iron concentration is simulated according to the as-grown concentration and distribution of iron within a silicon wafer, both in the presence and absence of the phosphorus emitter, and applying different time-temperature profiles for the firing step. The competing effects of dissolution and gettering during the short annealing process are found to be strongly dependant on the as-grown material quality. Furthermore, increasing the temperature of the firing process leads to a higher dissolution of iron, hardly compensated by the higher diffusivity of impurities. A new defect engineering tool is introduced, the extended co-firing, which could allow an enhanced gettering effect within a small additional tim

Low-temperature saw damage gettering to improve minority carrier lifetime in multicrystalline silicon

The minority carrier lifetime in multicrystalline silicon − a material used in the majority of today's manufactured solar cells − is limited by defects within the material, including metallic impurities which are relatively mobile at low temperatures (≤700 °C). Addition of an optimised thermal process which can facilitate impurity diffusion to the saw damage at the wafer surfaces can result in permanent removal of the impurities when the saw damage is etched away. We demonstrate that this saw damage gettering is effective at 500 to 700 °C and, when combined with subsequent low-temperature processing, lifetimes are improved by a factor of more than four relative to the as-grown state. The simple method has the potential to be a low thermal budget process for the improvement of low-lifetime “red zone” wafers

Minority carrier lifetime in silicon photovoltaics : the effect of oxygen precipitation

Single-crystal Czochralski silicon used for photovoltaics is typically supersaturated with interstitial oxygen at temperatures just below the melting point. Oxide precipitates therefore can form during ingot cooling and cell processing, and nucleation sites are typically vacancy-rich regions. Oxygen precipitation gives rise to recombination centres, which can reduce cell efficiencies by as much as 4% (absolute). We have studied the recombination behaviour in p-type and n-type monocrystalline silicon with a range of doping levels intentionally processed to contain oxide precipitates with a range of densities, sizes and morphologies. We analyse injection-dependent minority carrier lifetime measurements to give a full parameterisation of the recombination activity in terms of Shockley–Read–Hall statistics. We intentionally contaminate specimens with iron, and show recombination activity arises from iron segregated to oxide precipitates and surrounding defects. We find that phosphorus diffusion gettering reduces the recombination activity of the precipitates to some extent. We also find that bulk iron is preferentially gettered to the phosphorus diffused layer rather than to oxide precipitates