Search and Selection of Learning Objects in Repositories: A Review

Author(s):  
German A. Osorio-Zuluaga ◽  
Nestor Dario Duque-Mendez
Author(s):  
David Lake ◽  
Kate Lowe ◽  
Rob Phillips ◽  
Rick Cummings ◽  
Renato Schibeci

This chapter provides a model to analyse the effectiveness and efficiency of Learning Objects being used in primary and secondary schools by considering their place within that educational environment, paying particular attention to the manner in which they, like any resource, can aid or occlude productive interactions between teachers and students. It draws from a study of Australian and New Zealand schools that piloted the first release of Learning Objects from the Le@rning Federation. The chapter considers the place of Learning Objects within the overall systemic school environment, and in this environment, examines the individual classroom as the combination of tensions between the teacher’s needs, the students’ needs, and the potential available within the existing infrastructure. Within this framework, the chapter discusses the ways in which these three components interact during teacher selection of Learning Objects, students’ accession of Learning Objects in the classroom, and the use of the Learning Objects by students. It concludes by suggesting how students’ construction of knowledge can be enhanced through merging the capabilities of the resource with the needs of students and teachers.


2006 ◽  
Vol 43 (2) ◽  
pp. 121-135 ◽  
Author(s):  
Pythagoras Karampiperis ◽  
Taiyu Lin ◽  
Demetrios G. Sampson ◽  
Kinshuk

ScientiaTec ◽  
2020 ◽  
Vol 7 (03) ◽  
Author(s):  
Giandra Volpato ◽  
Victória Furtado Migliavacca ◽  
Bruna Coelho de Andrade ◽  
Júlio Xandro Heck ◽  
Marco Antônio Záchia Ayub

The industrial application of lipolytic enzymes has been studied mainly due to the ability of these enzymes in catalyze reactions of synthesis and their stability in various organic solvents. One possibility is the use of lipase the organic synthesis, taking advantage as the generation of waste and difficult recovery of sub bioproducts. In this work, we carried out a selection of eighty-four isolates of Bacillus amazonian for lipase production, of which 30 strains showed lipolytic activity. The study of the culture conditions was performed through a Plackett-Burman experimental design using the strain that presented the highest lipolytic activity in a culture medium using glycerol as substrate.  The studied conditions were: concentration of soybean oil, olive oil, triton X-100, gum arabic, glycerol, and (NH4)2SO4, pH, temperature and concentration of inoculums. The best result obtained were 27 U/L in 48 h of cultivation by Bacillus circulans BL53. This work shows that the search and selection of microorganism with lipolytic activities can facilitate the discovery of new lipases, with potential use as by-product surplus.


Nutrients ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 401
Author(s):  
José Antonio Picó-Monllor ◽  
José Manuel Mingot-Ascencao

In the article, “Search and Selection of Probiotics That Improve Mucositis Symptoms in Oncologic Patients [...]


Author(s):  
Tobias Feldhoff ◽  
Falk Radisch

AbstractIn the recent years, awareness has risen by an increasing number of researchers that we need studies that appropriately model the complexity of school improvement if we want to increase our knowledge about school improvement substantially and to close the identified research gaps within this field (Feldhoff T, Radisch F, Klieme E, J Educ Admin 52(5):565–736, 2014; Hallinger P, Heck RH, School Effect School Improv 22(2):149–173, 2011; Sammons P, Davis S, Day C, Gu Q, J Educ Admin 52(5):565–589, 2014). So far, respective quantitative studies, that appropriately consider those complexities, have hardly been realized because of the high efforts of current methods and costs involved (Feldhoff T, Radisch F, Bischof LM, J Educ Admin 2(54):209–240, 2016). It is, therefore, apparent to look for new, innovative methods that can adequately take into account the complexity of school improvement. For a reasonable search and selection of innovative methods, it is necessary to describe the systematic complexity of school improvement and the resulting requirements for the methods in more detail. This is a central goal in this chapter. For this reason, we present our framework of complexity. We then formulate questions that will prompt the reader to reflect critically upon the methods in general and especially in this volume.


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