Pt. Schwartz University of Texas, Austin, Texas 78712 (Received 22 August 1977; revision received 30 January 1978) The formation of the anthelion is discussed. Previous theories by Bravais, Humphreys, and others are shown to be imcompatible with observation, or highly improbable. An explanation is set forth in which the anthelion is formed in common hexagonal columns with the c axis horizontal ...

, e outer side, the outer edge of the conjoint tendon on the mesial side, and the pubic one below. The transversalis fascia is bulged through this space, and even when the yide-mouthed sac has been ligatured and removed, it is impossible to suture the conJoint tendon to the inner part of the inguinal ligament in such a way as to form a strong oor to this part of the inguinal canal; for there is...

Raked linear dunes keep a constant orientation for considerable distances with a marked asymmetry between a periodic pattern of semi-crescentic structures on one side and a continuous slope on the other. Here we show that this shape is associated with a steady-state dune type arising from the coexistence of two dune growth mechanisms. Primary ridges elongate in the direction of the resultant sa...

Abstract—This study was conducted to evaluate the seismic performance of weir structures using two different approaches: i) design response spectrum with respect to KBC 2009 in Korea and ii) acceleration of time history (PGA, 0.3011 g) obtained from 1994 Northridge earthquake. This paper provided the simple linear elastic 2D plane strain FE model with the material nonlinearity including soil-fo...

BACKGROUND Prone, supine, and side position exercises are employed to enhance core stability. HYPOTHESIS Overall core muscle activity would be greater in prone position exercises compared with supine and side position exercises. STUDY DESIGN Controlled laboratory study. METHODS Eighteen men and women between 23 and 45 years of age served as subjects. Surface electrodes were positioned ove...

Weirs, as overflow structures, are extensively used for the measurement of flow, its diversion and control in the open canals. Labyrinth weir due to more effective length than conventional weirs, allows passing more discharge in narrow canals. Determination the design criteria for the practical application of these weirs need more investigation. Weir angle and its position relative to the flow ...

In the scope of dam rehabilitation to manage floods increase or storage, Piano Key Weir is a good solution for concrete dams. The efficiency Weirs now well demonstrated through various experimental studies. Until most prototypes close Type A using symmetrical up- and downstream overhangs structural reasons. position influences inlet outlet key slopes cross section as side crest length influence...

abstract weirs are the most common structures for discharge measurement in engineering research. streamline curvature, non hydrostatic pressure distribution on weir and nappe adherence to the weir lead to differences between calculated and measured discharges. thus discharge coefficient, which is the ratio of real and theoretic discharges, is usually less than unity. in circular weirs the press...

The diffraction problem of a three-dimensional elliptic Gaussian beam on a aperture array of rectangular holes is solved. The both normal and oblique incidences of the beam are considered and the results are presented in the form of the three-dimensional patterns. The pattern lobe distortion and conditions at which the side lobes appear are studied. The conditions under which the shift of the r...

PURPOSE The repair of groin hernias with local anesthesia has gained popularity. Two main methods have been described for local anesthesia. This study was aimed at comparing percutaneous truncular ilioinguinal-iliohypogastric block and step-by-step infiltration technique by using cadaver dissections. METHODS The study was performed on an adult male cadaver by using blue dye injection. A percu...