Various Ca(2+) antagonists used in animal research, many of them known to be Ca(2+) channel blockers, inhibited Escherichia coli chemotaxis (measured as entry of cells into a capillary containing attractant). The most effective of these, acting in the nanomolar range, was omega-conotoxin GVIA. The next most effective were gallopamil and verapamil. At concentrations around 100-fold higher than t...

Falling parallelograms exhibit coupled motion of autogyration and tumbling, similar to the motion of falling tulip seeds, unlike maple seeds which autogyrate but do not tumble, or rectangular cards which tumble but do not gyrate. This coupled tumbling and autogyrating motion are robust, when card parameters, such as aspect ratio, internal angle, and mass density, are varied. We measure the thre...

E-learning provides a convenient and efficient way for learning. Formative assessment not only guides student in instruction and learning, diagnose skill or knowledge gaps, but also measures progress and evaluation. An efficient and convenient e-learning formative assessment system is the key character for e-learning. However, most e-learning systems didn’t provide methods for assessing learner...

Statistical graphics are important both in exploratory data analysis and in presenting results to non-professionals. Pie charts are often used to show a partition, but are hard to compare with each other. A spie chart is a combination of two pie charts: one sets the angles of the slices, and the other sets their areas, by manipulating the radius of each slice individually. This enables an easy ...

Linear array CCD based panoramic cameras are being used for measurement applications. The elegant image acquisition mode and the high information content of those images make them suitable candidates for quantitative image analysis. For accurate measurements a sophisticated camera calibration is an important prerequisite. In our previous investigations we designed a sensor model for linear arra...

Blogging in the classroom is not a new idea, but my students have tended to view the blogging assignment negatively, as a homework assignment that simply needed to be done each week and then forgotten until the next time they were required to visit the blog. With that in mind, I decided to employ a very different method of educational blogging—using the Tumblr platform—in which each student wou...

'Indian' numerals, which are popular among the Arab population, were used to devise a new Snellen's visual acuity chart. The new chart has the advantages of a reading chart. It keeps the patient's interest, does not miss alexic patients, and is quicker to perform. It is also devoid of the many disadvantages of a kinetic response chart (the capital E letter or Landolt's broken rings), especially...

The aim of this study was to determine the effects tumbling at different post-mortem times on proteolytic features and quality attributes beef loins (M. longissimus lumborum). Loins (n = 12) were cut into 4 sections assigned 1, 6 or 11 days non-tumbled control. Upon tumbling, additional ageing applied a common time 16 days. In general, had no considerable impacts water-holding ability samples. ...

the most well-known uni-arribute control chart used to monitor the number of nonconformities per unit is the shewhart type c-chart. in this paper, a new method is proposed in an attempt to reduce the false alarm rate in the c-chart. to do this, the decision on beliefs (dob) concept is first uti [1] corresponding author e-mail: [email protected]   lized to design an iterat...