EXPERIENCE has shown that the common method of “laying out” geometrical problems on the drawing board leads to a large expenditure of man‐hours and, in general, a result…
EXPERIENCE has shown that the common method of “laying out” geometrical problems on the drawing board leads to a large expenditure of man‐hours and, in general, a result of doubtful accuracy. This loss of accuracy is aggravated by scale, and results on large structures may be inaccurate by a prohibitive amount. Use of analytical geometry may be said to have two major advantages, therefore, (a) Less man‐hours required for the job, (b) Any desired standard of accuracy may be obtained.
FOLDING wings of the type employing a skew—hinge axis present a somewhat difficult lay‐out problem in way of the wing cut. The problem with which this article is concerned…
FOLDING wings of the type employing a skew—hinge axis present a somewhat difficult lay‐out problem in way of the wing cut. The problem with which this article is concerned is that of obtaining, in the form of vertical spanwise sections, the surface swept out by one cut edge of the folding portion as the wing rotates. This enables the bottom cut line to be determined when the top cut line is known, or vice versa. If the leading edge rises when the wing folds, the top cut line will be determined by the fully folded position; if the leading edge falls, it will be the bottom cut line that is thus determined. The following diagrams and calculations are made for the rising leading edge type; the same method may be applied to the falling leading edge type viewing the wing upside down. A numerical example is worked along with the theory.
A FREQUENTLY recurring problem, more particularly in the sphere of electrical engineering practice, is the determination of the equivalent rating of a machine or piece of apparatus under conditions of intermittent loading. By equivalent rating is to be understood the value of the continuous load, whether expressed in terms of current or power, which will produce the same final temperature rise as is actually produced by the given intermittent load.
AXIAL flow fans were originally developed from aircraft airscrews and therefore can be claimed as children of aeronautical science. Their use has been confined in…
AXIAL flow fans were originally developed from aircraft airscrews and therefore can be claimed as children of aeronautical science. Their use has been confined in aeronautics to wind tunnels and radial engine cooling until the advent of ‘pressurized’ cabins. In this case ventilation requirements have caused an axial flow fan to be used. These fans have been gradually developed in the ventilation industry and they are replacing centrifugal fans where these would have been used previously. Price and noise level have not been in the axial flow fans' favour in this fight but they have advantages of higher efficiency, ease of installation and non‐overloading power characteristic. Latest developments in aerodynamic design and production technique suggest that the disadvantages are being overcome. This note is intended to furnish a general introduction to the design features of axial flow fans for aircraft ventilation.
This American textbook, originally reviewed in AIRCRAFT ENGINEERING, Vol. xvi, June, 1944, p. 170, has now been made available in Great. Britain, so attention may again be called to it as it provides a practical means of applying analytical geometry to aircraft lofting. The author is head of Engineering Loft' Mathematics at North American Aviation, Inc. He thus occupies a position which has no counterpart in the average British firm, and the book is interesting as an insight into modern American methods.
To examine how vocabulary instruction can lead toward students connecting the known to the familiar with the unknown.
Theoretical advances in vocabulary acquisition and utility are discussed in relation to word reading and knowledge formation. Extending theory requires pedagogical planning and reinforcement to promote skill learning first toward preparing students to have the capacity to acquire vocabulary across the content areas and in turn, understand and apply that knowledge toward problem solving.
Students must be scaffolded toward connecting what they know with that which is familiar and eventually with the unknown; only then can we extend learning beyond our guidance and supervision. Students must be taught how and when to use vocabulary acquisition strategies so they are prepared to overcome difficulties associated with word meanings in independent reading.
It is timely for rich, varied, and complete vocabulary instruction to serve as the basis for learning across the curriculum. Words are the predecessors of tomorrow’s learning and we must consider how to best provide instruction for students who overuse sight words, text shorthand more than they write formally, and even substitute inappropriate language based upon a lack of vocabulary knowledge and ability to articulate their feelings.
The main purpose of this chapter is to investigate whether hotel hospitality mediates and/or moderates the relationships between surprise experience and customer delight…
The main purpose of this chapter is to investigate whether hotel hospitality mediates and/or moderates the relationships between surprise experience and customer delight in the context of hotel services. This study, involving 300 Malaysian and non-Malaysian hotel guests, employs questionnaire surveys as the main data collection method. The results indicate that there is a strong and positive relationship between surprise and customer delight, and hotel hospitality mediates and also moderates the abovementioned direct relationship.
In the context of increasing consolidation in the banking industry, this research examined one of the motives for bank acquisitions and the kinds of acquisitions made by…
In the context of increasing consolidation in the banking industry, this research examined one of the motives for bank acquisitions and the kinds of acquisitions made by banking firms. The effect of ownership concentration was tested on the absolute level of bank acquisitions and the average degree of geographic‐market overlap of these acquisitions. In a sample of 156 banking firms, banks featuring dispersed ownership were found to acquire other banks with less market‐overlap than did banking firms with concentrated ownership. However, ownership concentration was not a significant predictor of the absolute level of merger activity. Implications of these differences in acquisition strategies are explored.