Site Libre Savoirs: Cristallographie, diffraction et symétries
Domaine: Chimie, physico-chimie et génie chimique
1) Cristallographie géométrique La symétrie des cristaux s'appuie sur un empilement périodique (réseaux) et des opérations de symétries d'orientation. La combinaison des deux types de symétrie (translation- orientation) permet de définir des symétries de positions et des groupes d'espace - la métrique du cristal : plans et distances réticulaires - Le réseau direct la maille, le réseau réciproque et les normales - Propri

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Преглед на технологични решения за управление на знан
The present paper focuses on a new managerial discipline emerging in the last few years of the 20th century. At the beginning are introduced some basic concepts used in the theory and practice of Knowledge Management, and are presented the benefits for utilization of Knowledge management. The main emphasis of the paper is on the technological solutions applied in the organizations at different stages of the knowledge management life cycle, whereas a summary is made of the types of technologies d
Author(s): Antonova Albena,Gourova Elissaveta,Nikolov Roumen

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Do students ideas about the antigen-antibody reaction change when they are gathered to design an exp
This study is a preliminary work before the development of the CoPEX software that helps students and teachers to design experimental procedure. To this date, there are no other intelligent learning environments for this task. An experiment was done in two high schools during an immunology course (a lecture and a practical work). It is done in ecological conditions during a laboratory session with students majoring in science (ISCED level 3A-16/18 years old). Students designed (imagined, wrote a
Author(s): Chapel Gwendaël,Marzin Patricia,Ney Muriel

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Mixed Reality Environment for Web-Based Laboratory Interactive Learning
This paper presents a web-based laboratory for distance learners by incorporating simulation and hardware implementation into web-based e-learning systems. It presents a development consisting of laboratory course through internet based on mixed reality technique to setup, run and manipulate set of experiments. Each experiment has been designed in a way that allows the learner to manipulate the components and check if it works properly in order to achieve the experiment objective. The proposed l
Author(s): Saleem Ashraf,Al-Aubidy Kasim

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Facilitating Knowledge Convergence in Videoconferencing Environments: The Role of External Represent
The study analyzed how two types of graphical representation tools influence the way in which dyads use shared and unshared knowledge resources in different collaboration scenarios, and how learners represent and transfer shared knowledge under these different conditions. We varied the type of graphical representation (content-specific vs. contentunspecific) and the collaboration scenario (videoconferencing vs. face-to-face). 64 university students participated. Results show that learning partne
Author(s): Fischer Frank,Mandl Heinz

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Computer literacy and inquiry learning: when geeks learn less
A low level of computer literacy has often been hypothesized as constituting a disadvantage in knowledge acquisition. However, within the field of computer-supported inquiry learning systematic investigations of these purported relations have not been conducted. This classroom study investigates the role of computer literacy (procedural computer-related knowledge, self-confidence in using the computer, and familiarity with computers) as a learning prerequisite for knowledge acquisition, and anal
Author(s): Wecker Christof,Kohnle Carmen,Fischer Frank

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“Graphical” Jogthrough: expert based methodology for user interface evaluation, applied in the cas
“Walkthrough” and “Jogthrough” techniques are well known expert based methodologies for the evaluation of user interface design. In this paper we describe the use of “Graphical” Jogthrough method for evaluating the interface design of the Network Simulator, an educational simulation program that enables users to virtually build a computer network, install hardware and software components, make the necessary settings and test the functionality of the network. Graphical Jogthrough is a furth
Author(s): Demetriadis Stavros,Karoulis Athanasios,Pombortsis

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A Didactic-based Model of Scenarios for Designing an Adaptive and Context-Aware Learning System
Nowadays, technology-enhanced learning systems must have the ability to take into account the context and to allow dynamic adaptation to different learners based on substantial advances in pedagogical theories and knowledge models. The main issue is to design a generic scenario which can deal with the broadest range of learning situations. From a generic scenario, the learning system will compute on the fly a particular scenario dedicated to the current learner and its learning situation. The ma
Author(s): Tetchueng Jean Louis,Garlatti Serge,Laubé Sylvain

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Lorem ipsum logos
The phrase Lorem Ipsum came from the classical Latin literature and was used by Cicero more than 2000 years ago. Since 1500’s Lorem Ipsum was used as a dummy text in order to visualize the graphical layout through a meaningless text. The goal was to let readers concentrate on the visual representation only. The current paper focuses on the Lorem Ipsum problem in modern Logo implementations. Most of them seem to focus on the semantics of the Logo language paying less attention to the quality of
Author(s): Boytchev Pavel

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Internet Scout Project
The past few years have seen many changes in the field of genetics, including the ability to genetically clone mammals, first achieved in 1997 with a sheep named Dolly. Still a relatively new phenomenon, news stories are continually detailing new advances in cloning, reasons why cloning is important, and concerns about the safety and ethics of cloning. This week's Topic In Depth highlights some recent news articles and Web sites that address the topic of animal cloning. The first site is a recen
Author(s): Lee, Amy.

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Supporting peer interaction in online learning environments
This paper reports two studies into the efficacy of sentence openers to foster online peer-to-peer interaction. Sentence openers are pre-defined ways to start an utterance that are implemented in communication facilities as menu’s or buttons. In the first study, typical opening phrases were derived from naturally occurring online dialogues. The resulting set of sentence openers was implemented in a semi-structured chat tool that allowed students to compose messages in a free-text area or via se
Author(s): Lazonder Ard

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Assignment and State
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Artful Boomerangs
Students will review three different types of boomerang shapes, use stencils to draw and cut out these, shapes and use various art materials and mediums to design their surfaces.
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Urinary Catheterization - Male
This video demonstrates the urinary catheterization procedure in a 67 year old male patient admitted to hospital with a complaint of urinary retention. The specific procedure shown is the two-way, indwelling Foley catheter. The video covers the patient interview, preparing oneself for the procedure following all universal precautions, preparation of the equipment tray, insertion of the catheter using and maintaining sterile technique, catheter removal and appropriate disposal of all used equipme
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Caves and Karst
This interactive resource adapted from the National Park Service presents the key concepts of cave and karst systems, including how and where they form, different types, and various cave environments.
Author(s): WGBH Educational Foundation

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Teaching and Learning: Research Briefing
An important aspect of schooling is to enable students to enter new knowledge worlds, such as the world of history, of English, of foreign languages, of science, of music, or of mathematics. In the InterActive Education project we have worked in partnership with primary and secondary school teachers, to investigate ways in which information and communications technology can be used to enhance learning, with a particular focus on improving subject knowledge.,Research briefing
Author(s): Sutherland Rosamund,John Peter,Robertson Susan

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Red Light, Green Light
Building upon their understanding of forces and Newton's laws of motion, students learn about the force of friction, specifically with respect to cars. They explore the friction between tires and the road to learn how it affects the movement of cars while driving. In an associated literacy activity, students explore the theme of conflict in literature, and the difference between internal and external conflict, and various types of conflicts. Stories are used to discuss methods of managing and re
Author(s): Integrated Teaching and Learning Program,

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Copyright 2011 - Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder,http://www.teachengineering.org/policy_ipp.php

Adapting to When Students Game an Intelligent Tutoring System
It has been found in recent years that many students who use intelligent tutoring systems game the system, attempting to succeed in the educational environment by exploiting properties of the system rather than by learning the material and trying to use that knowledge to answer correctly. In this paper, we introduce a system which gives a gaming student supplementary exercises focused on exactly the material the student bypassed by gaming, and which also expresses negative emotion to gaming stud
Author(s): Baker Ryan,Koedinger Kenneth R.,Corbett Albert T.,

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Developing Questions for Gallery Walk to Engage Higher Order Thinking
This site from SERC's Starting Point explains best practices for developing Gallery Walk questions which involves preparing questions based on a lecture's central concept, issue, or debate. A variety of questions can be used but the technique seems to work best with higher order questions relating to analysis, evaluation, and synthesis; using Bloom's Hierarchy provides a guide for wording questions at various levels of abstraction. Examples of various types of questions including comprehension,
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Developing a Local Stratigraphy
In this lab activity students describe rock types in a variety of exposures to construct a regional stratigraphy. Learning goals, teaching notes and materials, equipment lists, and assessment recommendations are all provided on this website. Additionally, there are links to useful references and resources, including related field labs.
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