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As the access to materials increased, competition to design the most beautiful patterns rose, with an estimate of over 300 different kogin-zashi patterns being created. In the 20th century, the craft of kogin-zashi was streamlined, establishing the three general types that are seen today: nishi-kogin , higashi-kogin , and mishima-kogin . [ 2 ]
Many sashiko patterns were derived from Chinese designs, but just as many were developed by native Japanese embroiderers; for example, the style known as kogin-zashi, which generally consists of diamond-shaped patterns in horizontal rows, is a distinctive variety of sashiko that was developed in Aomori Prefecture.
Consequently, two different versions of the method have been proposed: one by Elnagar et al., [2] and another by Fahroo and Ross. [3] The two versions differ in their quadrature techniques. The Fahroo–Ross method is more commonly used today due to the ease in implementation of the Clenshaw–Curtis quadrature technique (in contrast to Elnagar ...
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The technique of optimal instruments can be used to show that, in a conditional moment linear regression model with iid data, the optimal GMM estimator is generalized least squares.
Hikeshi banten is a reversible hanten coat worn by hikeshi, Japanese firefighters of the Edo period, often decorated with symbolic images.Firefighter brigades consisted either of samurai (buke hikeshi) or commoners (machi hikeshi).
The Sargan–Hansen test or Sargan's test is a statistical test used for testing over-identifying restrictions in a statistical model. It was proposed by John Denis Sargan in 1958, [ 1 ] and several variants were derived by him in 1975. [ 2 ]
Hansen's father William G Hansen, who was a son of immigrants from Denmark, was a hardware store owner in Fresno, California. He encouraged his son's early talent in mathematics and enthusiasm for electronics. He entered Stanford University at the age of 16, earning his B.A. in 1929 and his Ph.D. in 1933. [2] [3]