Archive for November, 2011

Computer Simulators

November 30th, 2011
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Therefore, in addition to traditional exercises to determine the price scale values apply computer simulator (multimedia application. Physics, 7klass. Presentation of the 04 'measurement of physical quantities'), then lead students to study computer science, computer lab where I spend working "definition of fluid with beakers. "(Laboratory work, Grade 7) and then spend only laboratory work itself. In ninth-great difficulties arise in assembling the circuit on a given schema. Therefore, in while learning the front of the laboratory work in phases I spend a demo computer laboratory work, "Building an electrical circuit and measuring the strength of the current" where children can see clearly how the instrument with which to connect and what order (Labs, Grade 8) difficulties in setting up the experiments and the lack of exact data values, measured during the operation, make it impossible to reach the goal, right interpret the results of experiments to make comparisons and conclusions. That is, ultimately, prevents the development of mental activity and creative abilities of students. In this respect, difficult to perform laboratory work in grade 10 with a conical pendulum.

Pendulum very quickly decay, the value of the oscillation period and the subsequent calculations of velocity and acceleration can only be approximate. Computer Lab allows you to measure with sufficient accuracy (laboratory work, grade 10). Using the lessons of physics elements of this educational technology provides each student to create a positive motivation to the process of teaching, the development of thinking and cognitive autonomy, intellectual and practical skills, development of skills in working with individuals equipment, development of ICT – the competence of trainees; efficient use of time in the classroom, the skills of self, group and team learning. I especially want to note The modeling of various phenomena in any case not a substitute for real, 'live' experiments, but in combination with them allows for a higher level to explain what was going on. Our experience shows that such lessons arouse students' interest in this, leave the work of even the weaker kids. The quality of knowledge at the same time considerably increases. Of education today requires more than yesterday. And it is using in the classroom information technology will help the teacher to build the learning process more efficient.


Clinical Laboratory Diagnostics

November 15th, 2011
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Clinical laboratory diagnostics (laboratory diagnosis) is a diagnostic medical specialty, consisting of a combination of in vitro studies of biological material of human body. Progress in basic research and the introduction of their results in practice determines the content of deepening and expanding the boundaries of clinical laboratory diagnosis in the future. The main task and the development of an specialty is to obtain objective data on health and illness of a single patient, or a specific group of people in the region as a whole. Obtaining reliable laboratory information, including monitor the effectiveness of treatment can be implemented on the basis of modern laboratory technology and the subsequent efficient clinical use of the results. The basis of the clinical laboratory diagnostics are medical technology, each of which, having been tested and scientific procedure, allowing the use, require specific guidelines: workplace health regulations, technical supervision, training, feasibility study and other clinical laboratory diagnosis is not without modern equipment, accelerating the work. Such equipment, for example, is an electronic dispenser. Electronic Dispenser – electronically controlled pipette.

Unlimited possibilities of dosing at the highest level. Large selection of modes for working with liquids. Works on the principle of air displacement. One species: a series of electronic dispenser e-Line. This ergonomic design combined with a fully automatic electronic upravleniem.Dozator has a convenient display with keypad. Also, the proposed dosing there is a unique system of relief tips. Easy programming highlights dispensers e-Line of equipment for the analytical work. Standard solutions are simpler operations of modern medicine. Together with use for preparation of solutions of pure drugs and solvents in pharmaceutical practice widely used by various concentrated solutions. Pharmacopoeial standard solution (liquid) are aqueous solutions of certain medicinal substances (acids, alkalis, salts, formaldehyde, etc.) in a strictly defined concentration specified in the relevant articles of the GF (State Pharmacopoeia – fundamental regulatory document, a collection of standards and regulations, defining quality, manufactured in Russia of drug substances and products made from them).

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Fluorescent Lamps

November 4th, 2011
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Development of high-intensity fluorescent lamps serious drawback of standard fluorescent tubular shape are their large size (especially length) at low power and, consequently, low brightness. Because it requires a large amount of material for the production of lamps and fixtures and virtually impossible to create high levels of illumination required for accurate visual works. So long (from 50s) made attempts to increase the brightness of the fluorescent lamp while maintaining high light output and durability. Obviously, the increase in brightness is inevitably associated with an increase in w = k 1EI/nd. Ways of increasing the light output at higher values of w. A simple increase in the power of the standard types of lamps above a certain limit by increasing the current strength leads to a significant drop in light output. When you overload a 40-watt lamp to 200 watts, the temperature rises to 90-95 C and luminous efficiency drops to 34%.

When the artificial maintenance of the mercury vapor pressure at an optimum level (GAD = 44, L-50 ) for the same increase in light output power drops to 45-48%. Therefore, the task of creating fluorescent lamps with high light output at higher values of w was primarily to find the conditions for discharge, providing for increased power densities higher yield of resonance radiation than conventional bulbs. Experimental and theoretical studies in this regard, both abroad and in our country, led to a deeper understanding of physical processes in the tubes and the creation of the theory of the discharge. As a result, there have been ways to a partial solution to this problem and the development of fluorescent lamps with higher light output at higher values of w. Based on analysis of the theoretical relations, it was shown that the necessary conditions of discharge reduced to maintain the optimum mercury vapor pressure corresponding to the maximum output of the resonant radiation, regardless of the specific power to raise the electron temperature, to reduce the concentration electrons to reduce the number of quenching collisions and to reduce heat loss.

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