Abstract: A method for accurately simulating the timing and power behavior of digital MOS circuits is provided. The method includes piece-wise linear modeling of transistors, dynamic and static construction of channel connected components, event driven simulation and current measuring capabilities for power supplies, grounds, and individual resistors and transistors.

Abstract: A fiber optic laser pumped via its cladding has a liquid component in the cladding and an index of refraction sufficient to promote total internal reflection of light carried by the cladding for pumping the laser. In one embodiment, the liquid component is provided by immersing the fiber clad with a curable polymer and a protective coating in a fluorinated organic compound.

Abstract: Vitreous solid compositions of formula I:Te.sub.w Se.sub.y X.sub.x Z.sub.z (I)whereinX represents at least one halogen selected from chlorine, bromine and iodine,Z represents at least one element selected from As, Sb and Bi,w, x, y and z represent the molar percentages respectively of elements Te, X, Se and Z,w being a number varying from 5 to 50,x being a number varying from 5 to x.sub.1,y being a number varying from 5 to 80,z being a number varying from 5 to z.sub.1,the numbers w, x, y and z being such that the sum (w+x+y+z) is equal to 100,the numbers x.sub.1 and z.sub.1 being such that:when X represents mostly iodine, x.sub.1 =50 and z.sub.1 =60,when X represents mostly bromine, x.sub.1 =60 and z.sub.1 =50, andwhen X represents mostly chlorine, x.sub.1 =60 and z.sub.

Abstract: The pressure balanced torsion system is for use in a backrest and the like. The system has a plurality of torsion action assemblies. Each assembly consists of a pair of pressure bearing plates mounted at the free ends of a torsion spring. The torsion spring is pivotally mounted to a rigid support plate which forms the back plate of the backrest. When a body rests against the backrest, the counter reactive force generated by the assembly causes both pressure bearing plates to push back against the body until the torsion is balanced, thus providing a uniform support to the body.

Abstract: The water filtration system according to the present invention includes a containment vessel(s) in which a filtration matrix is contained. The filtration matrix comprises a plurality of particles on which a regenerative membrane is formed directly on the surface. Through extensive experimentation, it has been found that the conditions suitable for reducing iron and manganese from water entering the vessel can be performed simply by controlling the amount of Fe.sup.3+ and pH in raw water entering the containment vessel. This is true even though the chemical characteristics of the underground water are changing.In one embodiment, the matrix comprises a plurality of polymeric particles selected from particles having specific gravity ranging from about 1.4 to about 2.7. Further, the particles have a nonuniformity coefficient no greater than about 2, and an average particle diameter ranging from about 1.0 mm to about 1.6 mm.

Abstract: The water filtration system according to the present invention includes a containment vessel(s) in which a filtration matrix is contained. The filtration matrix comprises a plurality of particles on which a regenerative membrane is formed directly on the surface. Through extensive experimentation, it has been found that the conditions suitable for reducing iron and manganese from water entering the vessel can be performed simply by controlling the amount of Fe.sup.3+ and pH in raw water entering the containment vessel. This is true even though the chemical characteristics of the underground water are changing.In one embodiment, the matrix comprises a plurality of polymeric particles selected from particles having specific gravity ranging from about 1.4 to about 2.7. Further, the particles have a nonuniformity coefficient no greater than about 2, and an average particle diameter ranging from about 1.0 mm to about 1.6 mm.

Abstract: The invention is particularly useful for multi-element solutions wherein successive pairs of X-ray beams are generated and passed through the solution sample corresponding to each of the successive various elements the concentrations of which is to be measured, enabling the on-line concentration measurement of, for example, rare earth elements. Microprocessor control is provided of the presentation of successive X-ray emitting irradiated metal targets to the solution sample and with programming enabling on-line successive measurement of the concentration of each successive element, calibration and storage of such measurements and calculation to eliminate the contribution of other interfering elements from the successive elements to be measured, and display of the successive element concentrations. Applications of the invention may be found, also, in the fields of wet metallurgy for precious metals and less common metals, in the field of petrochemical industry and other chemical engineering applications.

Abstract: An improved brief which provides an internal pocket in the front of the brief with an opening at the top. The pocket is positioned to hold the shaft portion of the penis as it extends downward, with the scrotum being separated by the cloth of the pocket piece from the shaft. Thus, any drippings from the tip of the shaft will not come in contact with the scrotum or any other portion of a man's body, since they will fall into the pocket and be separated thereby. In addition, by separating the skin of the shaft from the scrotum, the formation of sweat in the area that would normally be contacting there-between is prevented.

Abstract: A solid vitreous composition has the formula: Te.sub.100-x-z X.sub.x Z.sub.z wherein x represents chlorine, bromine or iodine, Z represents sulfur and/or selenium; x represents the molar percentage of X and ranges from 5 to 67; z represents the molar percentage of Z and ranged from 0 to 60; it being understood that the sum (x+z) ranges from 33 to 85. A method for the preparation of this composition is disclosed as is its use in the field of optoelectronics and infra-red transmission.