cleft hand deformity is a rare congenital anomaly of the hand with an incidence rate about 1/90,000. it has two clinical types typical and atypical. in this paper we are representing ten cases of this anomaly admitted during seven years from 1992 in emam khomeini hospital. some of the patients especially those with typical cleft hand deformity achieved good functional results after surgical cor...

spine surgery began its evolution in the beginning of the 19th century in order to reach nowadays the point of being considered an important subspecialty of neurosurgery and orthopaedics. the purpose of this historical review is the search and evaluation of the progress in spine surgery until the middle of the 20th century. this review concerns the inauguration and evolution of this field in gr...

background: to determine the most important preoperative factors that affect postoperative coronal parameters of scoliotic curves.   methods: all adolescent idiopathic scoliosis (ais) patients included in the study were classified according to lenke and king classification. the fusion levels were selected according to the rigidity of the existing curves (correction less than 50%), tilt of t1 an...

This masonry research investigated the differences in the static and dynamic stiffness for the seismic range of loads and frequencies for a pressed clay masonry wythe. The effective stiffness has been defined in Newtonian physics and Damage Mechanics. This research used the concept of measured stiffness defined as the measured stress field divided by the measured strain field. A two-part test r...

Hybrid subdomain analysis is utilized to optimize the design of a high-speed compressor motor. Permanent magnets (PMs) are arranged in Halbach array and bounded by carbon fiber sleeve. The stator core does not have slot structure, so that it advantageous reducing iron loss. Since saturation takes place, magnetic equivalent circuit (MEC) used find permeability depending on flux density yoke. Fur...

So far, the scope of computer algebra has been needlessly restricted to exact algebraic methods. Its possible extension to approximate analytical methods is discussed. The entangled roles of functional analysis and symbolic programming, especially the functional and transfor-mational paradigms, are put forward. In the future, algebraic algorithms could constitute the core of extended symbolic m...

The shallow estuaries and bayous of the Gulf Coast are used extensively as nursery grounds by several species of commercially important shrimp. In our studies on the estuarine phase of the life cycles of Penaeus setiferus and Penaeus u&ecus, sampling for post-larval and juvenile shrimp in the nursery areas presents a problem. The young shrimp tend to concentrate in areas of stiff salt-cord gras...