Search results for "descriptive"
showing 10 items of 494 documents
Dehydration of Fructose to 5-HMF over Acidic TiO2 Catalysts
2020
Different solid sulfonic titania-based catalysts were investigated for the hydrothermal dehydration of fructose to 5-hydroxymethylfurfural (5-HMF). The catalytic behavior of the materials was evaluated in terms of fructose conversion and selectivity to 5-HMF. The surface and structural properties of the catalysts were investigated by means of X-ray diffraction (XRD), N2 adsorption isotherms, thermo-gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and acid capacity measurements. Special attention was focused on the reaction conditions, both in terms of 5-HMF selectivity and the sustainability of the process, choosing water as the solvent. Among the various process condition…
Robust existence of nonhyperbolic ergodic measures with positive entropy and full support
2021
We prove that for some manifolds $M$ the set of robustly transitive partially hyperbolic diffeomorphisms of $M$ with one-dimensional nonhyperbolic centre direction contains a $C^1$-open and dense subset of diffeomorphisms with nonhyperbolic measures which are ergodic, fully supported and have positive entropy. To do so, we formulate abstract conditions sufficient for the construction of an ergodic, fully supported measure $\mu$ which has positive entropy and is such that for a continuous function $\phi\colon X\to\mathbb{R}$ the integral $\int\phi\,d\mu$ vanishes. The criterion is an extended version of the control at any scale with a long and sparse tail technique coming from the previous w…
KARAKTERISTIK MORFOLOGI KANGURU POHON CENDERAWASIH (Dendrolagus ursinus) DI KAWASAN PEGUNUNGAN ARFAK MANOKWARI
2008
<em>This research was carried out to study the morphological charachteristics of the tree kanguroo in the Arfak Mountains, especially in the village of Mokwam and Umbui. Observation was done on the qualitative and quantitative charachters. Four kanguroo tree was observed during the study</em>
Incidencia de factores personales y contextuales sobre el uso de los recursos tecnológicos por el alumnado en América Latina
2021
El uso de las tecnologías de la información y de la comunicación (TIC) por parte de alumnado refleja si el proceso de integración es apropiado. No obstante, la tipología de uso de las TIC en el alumnado no se ha establecido de forma empírica en función de su uso en casa y el centro educativo. Así, el propósito del artículo es determinar la estructura del uso de las TIC por parte del alumnado, junto con la influencia de factores personales y contextuales. Se ha empleado un diseño correlacional, siendo la muestra el alumnado de sexto curso de América Latina que ha respondido al cuestionario sobre uso de las TIC en el Tercer Estudio Regional Comparativo y Explicativo (TERCE). El análisis de da…
Conocimiento acerca de las estrategias de práctica instrumental al inicio del Grado Superior de Música
2017
Cabe pensar que un estudiante de instrumento que accede al Grado Superior de Música, tras aproximadamente 10 años de formación, debería tener una práctica efectiva y, por lo tanto, un manejo adecuado de numerosas estrategias. En este sentido, el estudio se planteó con objeto de corroborar el estado de conocimientos previos de los estudiantes que ingresan al Conservatorio Superior de Música de Aragón con respecto a diversas estrategias de práctica instrumental de eficacia avalada por investigaciones previas y/o la experiencia profesional de grandes intérpretes. La investigación de carácter descriptivo presenta una metodología de carácter cualitativo en la que las técnicas de recogida de dato…
Carnaval y música: una breve semblanza de la Tuna Compostelana de 1888
2021
At the end of the 19th century, Spanish carnivals have been marked by the participation of the different tunas or also known as, estudiantinas. These groups achieved significant relevance in Galicia, especially in the city of Compostela, which, year after year, encouraged and supported the formation of groups of this nature to liven up the carnivals in the different Spanish cities. Although, different from its predecessors, the Santiago Tuna of 1888 ventured and made its mark in history, thanks to its intrepidity in having been the first Galician group that crossed the borders and enlivened the carnivals in the cities of the neighboring country, Portugal. This research, approached from a hi…
IANUS - Comparative analysis - Appendix A: UST analysis
2002
UST dimension concerns data different from already analyzed data of ABA, ENQ, and ECO for their own nature: UST data are individual/subjective data while ABA, ENQ, and ECO are aggregate/objective data. So, the analysis criterion used for UST data will be different from that used previously. Our aim, in this section, is an evaluation of the users’ opinions on facilities through a descriptive analysis of our sample results.
Ciešamās kārtas lietojums zinātnisko rakstu un bakalaura darbu anotācijās
2019
Pētījuma tēma ir ciešamās kārtas lietojums anotācijās. Ciešamā kārta dzimtās un svešvalodas akadēmiskajos rakstos ir pētīta pirms (Hinkele, 2004); taču to lietojums anotācijās netiek pētīts. Šis pētījums attiecas uz ciešamās kārtas analīzi angļu kā svešvalodas studentu bakalaura darbu anotācijās un pētnieku zinātnisko rakstu anotācijās. Teorētiskais pamatojums ir balstīts uz Kvirka (Quirk et al., 1985), Baibera (Biber et al.,1999), Hadlestona un Pulluma (Huddleston un Pullum 2005), Kollinas un Hollo (Collins un Hollo 2010) un citu autoru darbiem. Pētījums ietver aprakstošās un secinošās statistikas rīkus un specializētā korpusa piemēru kvalitatīvās analīzes aspektus. Rezultātu aprakstā ir a…
Īpašības vārdu lietojums produktu aprakstos pārtikas uzņēmumu interneta mājas lapās
2019
Šajā bakalaura darbā ir aplūkoti aprakstoši, novērtējoši īpašības vārdi, kā arī to salīdzinājuma pakāpes, kuras izmantotas produktu aprakstos pārtikas rūpniecības uzņēmumu tīmekļa vietnēs. Pētījuma mērķa sasniegšanai un lai atbildētu uz pētījuma jautājumiem, pētniecības metodes ietvēra literatūras apskatu un diskursa analīzi. Bakalaura darba mērķis bija izpētīt īpašības vārdu lietošanas biežumu un nolūku mērķi astoņdesmit produktu aprakstos. Galvenie secinājumi ir, ka novērtēšanas īpašības vārdu biežums ir lielāks, salīdzinot ar visiem analizētajiem īpašības vārdiem. Lielākā daļa uzņēmumu balstās uz novērtēšanas īpašības vārda izmantošanu, lai uzsvērtu labākās produktu aprakstu daļas lai pi…
El legado de las voces y los escritos: su valor como testimonio de la cultura escolar
2020
ABSTRACT The article analyzes the ways by which the voices and writings from the past, both those that have reached us as those that we still can obtain from living people, may contribute in a special way to the knowledge and interpretation of school culture from the past. We argue they make a very important and valuable historical and educational heritage, which must be saved and availed. The potentialities and values of these resources, "egodocuments", are indicated through it, and also their problems, as well as the limitations and cautions to be considerated by the researcher. Several aspects are reviewed and analyzed through the entire work: the “testimonies”' value as an object of int…