Project based learning in ICT transaction and teachers' preparation

Information communication technology (ICT) has a tremendous potential to make teaching learning process a dynamic one. ICT based learning does not mean replacing the teacher with computer and it's a value addition, it gives the learner freedom and learner's autonomy, and scope for constructing their own knowledge NCF (2005). PBL is an alternative strategy which is effectively used to enhance the learning capacity of student teachers. The PBL needs an in-depth investigation of the topic. In a typical PBL setup the entire class is involved on a common project or it can be assigned to a group with different PBL tasks selected by the class teacher on a theme. PBL has been adopted in Regional Institute of Education Mysore to engage the student in learning ICT knowledge and skills through extended inquiry process structured around complex authentic question or driving question and carefully designed the project and tasks. Students acquiring a range of ICT skills, like word processing, PowerPoint presentation, use of spreadsheets, e-mail, publishing news letter in web designing, handling database and use of different types of computer assisted learning materials, introduction of new concepts in a micro environment, which allows students to use their own learning capacities and to know how to use these gadgets, in different subject areas at different levels giving appropriate feedback. Simulation of science experiments, which are impractical to perform in the laboratory can be performed by virtual mode, The present paper describes the analysis of the feedbacks given by the fresh batch of students who were yet to start a project, its about project evolution by fresher on the senior batch of student teachers project done during the year 2009 - 10

Precision suture with a thread made of polyolefin compounds (prolene, polypropylene) in surgery of the biliary ducts

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Not AvailablePreliminary shelf life tests were performed to select the best gas composition and the best sodium acetate concentrations in the modified atmosphere. Bacterial quality assessment was carried out by the monitoring of total aerobic bacteria, H2S producing bacteria, lactic acid bacteria, pseudomonads, Enterobacteriaceae, Staphylococcus aureus, streptococci, sulphite reducing clostridia and botulinum toxin by mouse bioassay. Bacteria grew most quickly in seer fish stored in air, followed by those in MAP and the lowest counts were with MAP pre-treated with sodium acetate. The application of sodium acetate treatment to seer fish steaks resulted in a bacteriostatic effect, contributing to the improvement of the microbiological quality of seer fish steaks. There was less trimethylamine in the modified atmosphere packed samples pretreated with sodium acetate than in air packed samples by the factor of seven, at the end of the shelf life. Modified atmosphere packaging alone increased the shelf life from 8 (air pack) to 22 days; however, addition of sodium acetate further extended the shelf life to 28 days. The results showed that the combined effect of MAP (70 vol.% CO2:30 vol.% O2) and sodium acetate (1%, w/v) is a valuable tool to allow an effective extension of the shelf life of raw fish products.Not Availabl

Precision suture with a thread made of polyolefin compounds (prolene, polypropylene) in surgery of the biliary ducts

[No abstract available

Nonlinear I-​V characteristics and threshold switching in As-​Te-​In glasses

Nonlinear I-​V behavior and elec. switching exhibited by chalcogenide glassy semiconductors, find applications in variety of areas including information storage and power control. Semiconducting chalcogenide As40Te60-​xInx glasses were prepd. by melt quenching technique. The current-​voltage and elec. switching behavior of these glasses were studied using a custom-​built PC based system. The results obtained clearly indicate that all the glasses studied exhibit current controlled neg. resistance behavior, which leads to the low resistance state. The switching to the low resistance estate is reversible and the samples revert back to the high resistance state on reducing the current. Threshold switching over such a wide range of compns. was obsd. only in very few systems so far. The most interesting outcome of the present studies is the variation of the switching voltage with compn. There is an increase in the switching voltage Vt with the increase in In concn. in the compn. range 7.5 ≤ x ≤ 12.5. Further, the compn. dependence of switching field is found to exhibit a distinct change in slope at x is 12.5 and Vt continues to increase with x until x = 13.5. Around x = 13.5, the trend is reversed and Vt starts decreasing with x. A min. in Vt is seen around the compn. x = 14.3, which corresponds to the chem. threshold of the As-​Te-​In system. Beyond x = 14.3, switching voltage increases with compn. again. The present result are consistent with earlier observations, which indicate the compn. dependence of switching voltages of chalcogenide glasses are influenced by chem. ordering and rigidity percolation

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Not AvailableThe effect of reduced oxygen atmosphere and sodium acetate treatment on the microbial quality of seer fish steaks was determined during chilled storage. The O2 absorber reduced the oxygen content in the pack to less than 0.01% corresponding to 99.96% reduction within 24 h. The use of O2 absorber with sodium acetate dip treatment extended the sensory shelf life up to 25 days compared to only 12 days for control air packs and 20 days for untreated samples with O2 absorber. A prominent lag phase was observed for many bacterium studied, particularly for the sodium acetate treated samples with O2 absorber. On the day of sensory rejection, both the total mesophilic and psychrotrophic counts reached 7.7–8.1 and 7.1–7.9 log cfu/g, respectively. The sodium acetate treatment and reduced O2 atmosphere affected the type of major spoilers. In air packed samples, H2S-producers predominated followed by Brochothrix thermosphacta, Pseudomonas spp., where as in the untreated samples with O2 absorber, H2S-producers predominated the microbial flora followed by Lactobacillus spp. For treated samples with O2 absorber, B. thermosphacta formed the major micro-flora followed by Lactobacillus spp. The use of O2 absorber inhibited the growth of Pseudomonas spp., and total Enterobacteriaceae.Not Availabl

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Not AvailablePangasianodon hypophthalmus (sutchi catfish) is a fresh water catfish extensively being cultured in the South East Asian countries in the recent years. The present study provides the first report on the effects of gutting on the quality characteristics of aquacultured sutchi catfish stored in ice. pH of whole ungutted and gutted catfish didn’t show significant difference (p>0.05) during ice storage period. Total Volatile Base Nitrogen (TVB-N), Alpha Amino Nitrogen (AAN), Free Fatty Acids (FFA) and Thio Barbituric Acid Reactive Substance (TBARS) were lower in gutted fish compared to whole ungutted fish at any particular day during ice storage. However, gutted fish expressed higher rate of primary lipid oxidation than ungutted fish. Textural degradation of the fish muscle as indicated by hardness, cohesiveness, springiness and chewiness was lower in gutted fish. Results of sensory evaluation revealed that gutting has significantly improved the sensory quality of the fish. However, microbiological analysis revealed higher Total Plate Count (TPC) and Enterobactereaceae count in gutted fish. The shelf life of gutted and whole ungutted sutchi cat fish as determined by microbiological analysis was 16–18 days and 18–20 days respectively while storage in ice.Not Availabl