2,345 research outputs found

    The design of systems for learning and working in librarianship.

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    The paper presents a philosophy and theory for the design of a system that would mediate between the librarian as a knowledge worker and the library as a learning organization. It does this by combining Activity Theory and Ecological Interface Design. The task to be supported is that of classification. The hypothesis is that the task of library classification can be supported by using the surrounding organization as an interactive learning environment, as the process of organizational learning depends on an appreciation of the cognitive process of classification

    Oscillatory subglacial drainage in the absence of surface melt

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    The presence of strong diurnal cycling in basal water pressure records obtained during the melt season is well established for many glaciers. The behaviour of the drainage system outside the melt season is less well understood. Here we present borehole observations from a surge-type valley glacier in the St Elias Mountains, Yukon Territory, Canada. Our data indicate the onset of strongly correlated multi-day oscillations in water pressure in multiple boreholes straddling a main drainage axis, starting several weeks after the disappearance of a dominant diurnal mode in August 2011 and persisting until at least January 2012, when multiple data loggers suffered power failure. Jökulhlaups provide a template for understanding spontaneous water pressure oscillations not driven by external supply variability. Using a subglacial drainage model, we show that water pressure oscillations can also be driven on a much smaller scale by the interaction between conduit growth and distributed water storage in smaller water pockets, basal crevasses and moulins, and that oscillations can be triggered when water supply drops below a critical value. We suggest this in combination with a steady background supply of water from ground water or englacial drainage as a possible explanation for the observed wintertime pressure oscillations

    Washington University Record, March 28, 2003

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    https://digitalcommons.wustl.edu/record/1962/thumbnail.jp

    Design and Optimization of Mefenamic acid Fast Dissolving Tablets Employing Modified Starch by 23 Factorial Design

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    Latest developments in the technology have promoted viable dosage alternatives through oral route for pediatrics, bed ridden, and nauseous patients. Patient preference is one of the most important aspects in pharmacy practice. Now a day’s pharmacy companies are coming up with innovative drug delivery systems to deliver the drugs efficiently and with less side effects. This innovation led to the introduction of the concept of fast dissolving tablets. Though, a wide range of superdisintegrant is available for formulation of fast dissolving tablets. Still there is continuous need of development of superdisintegrants. Therefore in the present investigation, starch based superdisintegrant was prepared and evaluated for its application in the design of fast dissolving dosage forms. Keywords: Fast Dissolving Tablets, Superdisintegrant, Modified Starch, Mefenamic acid

    Design, Optimization and Evaluation of Piroxicam Fast Dissolving Tablets Employing Modified Starch by 23 Factorial Design.

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    Fast dissolving tablet have potential advantages over conventional dosage forms, which has helped patient compliance, convenience, bioavailability and rapid onset of action. These are very good for drug delivery over geriatric and pediatric patients. They have significant advantages of solid and liquid dosage forms, because when they are in solid form and when transformed into liquid form and within few seconds after it is consumed. With new technologies for it formulation many commercial products are available in the market for the patients. So FDT have awful scope for being the delivery system. Therefore in the present investigation, starch based superdisintegrant was prepared and evaluated for its application in the design of fast dissolving dosage forms of piroxicam. Keywords: Fast Dissolving Tablets, Superdisintegrant, Modified Starch, Piroxicam

    Taste masking Technologies: A Boon for Oral Administration of Drugs

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    Oral administration is widely used route of administration of drugs. The drug travels from the mouth, into the esophagus, then into the intestines. Sensing the taste is the major function of the tongue. In the formulation for pediatric & geriatric, bedridden & non-Cooperative patients, the main challenge to compounding pharmacist is to mask the taste of obnoxious and bitter drugs, result in patient non-compliance. Patients now expect and demand formulations that are pleasantly, or at least tolerable, flavored. This article reviews on taste-masking technologies and approaches for taste masking and bitterness reduction of dosage forms.  Keywords: Oral Administration, Drugs, Taste making, Taste bu
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