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AKTYWNOŚCI STYMULUJĄCE REFLEKSJĘ W NAUCZANIU JĘZYKA PISANEGO W WIRTUALNEJ KLASIE

100%

Mokwa-Tarnowska I.

Neofilolog

2014

nr 42/2

201-214

The paper aims to show how to engage students attending an online language course in various activities which by stimulating reflection enhance the learning process and result in better learning outcomes. By blending cognitivist, constructivist, constructionist and behavioural ideas, course developers and tutors can produce materials and use methods which satisfy the varied needs of adults who want to improve their writing skills. Such a blend leads to a unique design, which can be achieved by tools available in a virtual learning environment. Course participants will be more adequately prepared for writing genuine texts in the future through use of such activities as working with authentic resources integrated with different tasks and assignments to stimulate reflection; studying under the supervision and guidance of the tutor; participating in collaborative projects to promote learner autonomy; developing new knowledge through meaning-making discussions; doing peer review as well as summative, formative assessment, and self-assessment. Experience of these ways of working will help the participants to eventually become self-regulated, lifelong learners.

Theoretical Evaluation of Ultrasonic Velocity in Binary Liquid Mixtures of Alcohols [S] + Benzene

89%

Santhi N. , Sabarathinam P. L. , Madhumitha J. , Alamelumangai G. , Emayavaramban M.

International Letters of Chemistry, Physics and Astronomy

2013

tom Vol. 2

18-35

Ultrasonic velocities and densities of the binary liquid mixtures of benzene with 1-propanol, 2-propanol, 1-butanol, 2-butanol and 3-butanol at 303.15 to 318.15 K, over the entire composition range were measured. The theoretical values of ultrasonic velocity were evaluated using the Nomoto’s Relation (NR), Ideal Mixture Relation (IMR), Free Length Theory (FLT) and Collision Factor Theory (CFT). The validity of these relations and theories were tested by comparing the computed sound velocities with experimental values. Further, the molecular interaction parameter (á) was computed by using the experimental and the theoretical ultrasonic velocity values. The variation of this parameter with composition of the mixtures has been discussed in terms of molecular interaction in these mixtures.