Background: Visual impairment due to colour blindness is an unusual suffering of the school children. It may be associated with erythrocyte G6PD enzyme deficiency. Objective: To find out defective vision due to colour blindness in apparently healthy school children and to measure erythrocyte G6PD enzyme level among them. Methods: This cross sectional study was carried out in the Department of Physiology, SSMC from 1 st July 2007 to 31 st June 2008. Five hundred (500) apparently healthy school children of old Dhaka, age ranged from 6 to 12 years irrespective of gender and race was selected as study population. Colour vision test was done by Ishihara's test. Erythrocyte G6PD enzyme was measured among the colour blind children. All the results were compared to that of children with normal colour vision. Results: Five male children were detected to have partial red-green type of colour blindness. The percentage of colour blindness was statistically not significant (p>0.05) when compared to that of children with normal colour vision. Mean erythrocyte G6PD enzyme level of colour blind children was significantly lower (p<0.05) compared to that of children with normal colour vision. Presence of G6PD enzyme deficiency among the colour blind children did not show any clinical abnormalities might be due to different non symptomatic G6PD variants. Conclusion: Visual defect due to colour which blindness particularly red-green type might be present in apparently healthy school children associated with erythrocyte G6PD enzyme deficiency.

Background: The academic activities of the 1st and 2nd year MBBS students are running according to the new curriculum (Curriculum 2002). Curriculum is a series of planned activities to which the learner may be exposed in order to achieve the learning goals. But due to ongoing modifications of society, disease demography, medical science, concepts of teaching and availability of newer technique; curriculum may need to be changed. Assessment is the process of testing a student's ability. A good assessment should be valid, reliable, practicable and objective. Without assessment the purpose of effective teaching will not fulfill. To change curricula, examination system or assessment system also needs to be changed. Though evaluation of students is an integral part of all educational processes, a suitable evaluation procedure is said to be lacking. So opinions of teachers as well as students are immensely important to develop an ideal evaluation procedure. Methodology: This cross-sectional prospective study was done in Dhaka Medical college over a period of 1 months.2nd year MBBS students( 100) and teachers of Physiology, Anatomy and Biochemistry (22) gave their opinion in this study in a mixed pattern of questionnaire ( both open-ended and closed) . Results: Majority of students( 84%) but minority of teachers opined that there was need of card completion examination as in course assessment system .Other teachers and students suggested for alternate examination instead of card completion examination like only MCQ (18%), both MCQ and SAQ (82%). Choice of venue of the examination were - tutorial class (58%), lecture class (21%), practical and tutorial class (21%). Discussion: Though present MBBS curriculum is a problem oriented scientific curriculum with modern concepts like MCQ, OSPE, SAQ and SOE; the teachers are facing a lot of problems in implementing the curriculum due to lack of orientation and shortage of manpower. Conclusion: In spite of criticisms Curriculum 2002 is a positive change in an academic field. In order to improve and update the curriculum; its planning should be constantly reviewed.   DOI = 10.3329/jom.v8i2.1404 J MEDICINE 2007; 8 : 39-43

Ten lines of eggplant (F3 to F7) derived from the crossing BAU Begun-1(resistant variety) with Dohazari G and Laffa S (susceptible cultivars) were evaluated for disease resistance and genotypic performances. Two lines of different characters from each generation were selected and inoculated with Phomopsis vexans under confined field condition at fruiting stage. The inoculated genotypes exhibited differential disease reaction. Percent fruit infection ranged from 2.77% to 4.1%. All the lines were found to be resistant to phomopsis fruit rot indicating the inheritance of resistance trait of donor parent BAU begun-1 to the offspring. Random Amplified Polymorphic DNA (RAPD) technique was used as a tool for assessing genetic variation and relationships among the genotypes. Amplification with three decamer primers generated 13 bands of which 11 (84.62%) were polymorphic. The highest intra-variety similarity indices (Si) value was found for Laffa purple globose of F7 plants and Dohazari green long of F4. The coefficient of gene differentiation (Gst) was 1.00 reflecting the existence of high level of genetic variations among the genotypes. Comparatively higher genetic distance (0.7466) was observed between Dohazari green long of F6 vs Laffa green globose of F6 and the higher genetic identity (0.9870) was found in Dohazari green long of F6 vs Laffa green globose of F5. The dendrogram (UPGMA) constructed from Nei's genetic distance produced two main clusters of the ten genotypes. The advanced lines can be released as variety after yield trial and also the genetic variation and relatedness to disease reaction as assessed using RAPD marker could be potential sources for further development of P. vexans resistant variety in terms of fruit color and shape.

Evaluating untrusted computer programs online by executing and testing them real-time has a challenging task of protecting the system integrity and the data confidentiality of the computer host. For the web based services on one of the most popular computer platforms, Linux, we propose three security protection tiers of different complexity and resource cost to incorporate the potentially unsafe application service via a web server. By utilizing a single regular Linux account of a corporate computer, or dual accounts as a combination, or multi-accounts of a dedicated computer, these three protection tiers can offer a trade-off between the simplicity in design and maintenance at the expense of a somewhat reduced security strength, and the more costly implementation and maintenance with a relatively better security strength. The need for such different tiers is especially true for our implemented in-house applications that aim to evaluate programming work automatically by executing the pertinent but untrusted client programs. 

Studies for assessing the suitability of Hoop-pine (Araucaria cunninghamii) wood for plywood and particleboard manufacture. It was found that 1.5 mm thick smooth and figured veneer can be made and dried easily. Three-ply plywood were made using veneer of this species bonded with liquid urea formaldehyde glue of 50% solid content, extended with wheat flour and catalyzed (ammonium chloride) with 2% hardener under the specific pressures, viz, 1.05 N/mm2, 1.40 N/mm2, 1.76 N/mm2 in three replications at 6 minutes press time and 120°C press temperature. Dry and wet shear test were conducted on the sample and their shear load at failure per unit area and percentage of wood failure were determined. 1.40 N/mm2 pressure was found best for the manufacture of plywood. The physical and mechanical properties of hoop-pine particleboard were studied. The particleboards were tested for determining the strength and dimensional stability. The tensile strength passed the German and British standard specifications, bending strength found to nearest the Indian Standard but did not pass the German and British standard specifications.