摘要:
An elastomeric urethane composition includes the reaction product of a resin composition, including a polyol, and an isocyanate. The resin composition and the isocyanate are reacted, in the presence of a first and a second catalyst, to form a polyurethane elastomer. The first catalyst includes a metal selected from the group of iron, titanium, zirconium and hafnium. The second catalyst includes an amine. The elastomeric urethane composition may be used in a method of making an article. The method includes reacting the resin composition and the isocyanate to form the elastomeric urethane composition, applying the elastomeric urethane composition to a mold cavity, and allowing the elastomeric urethane composition to cure to form a first layer. The method also includes applying a urethane composition, different from the elastomeric urethane composition, to the mold to form a second layer, curing the article in the mold, and de-molding the article from the mold.
摘要:
A proppant comprises a particle and a polycarbodiimide coating disposed on the particle. The polycarbodiimide coating comprises the reaction product of a polymeric isocyanate and a monomeric isocyanate, in the presence of a catalyst. A method of forming the proppant comprises the steps of providing the particle, providing the polymeric isocyanate, providing the monomeric isocyanate, providing the catalyst, reacting the polymeric isocyanate and the monomeric isocyanate in the presence of the catalyst to form the polycarbodiimide coating, and coating the particle with the polycarbodiimide coating.
摘要:
An implantable, substantially isodiametric, low resistance implantable lead having at least one electrode positioned in a stimulation/sensing portion of the lead as well as a method of manufacturing the same. At least the stimulation/sensing portion is unitized through partially surrounding and supporting insulation and conductive element(s) of the stimulation/sensing portion with a fused matrix of material having mechanical properties consistent with a body of the lead.
摘要:
In one embodiment, a method electrically stimulates an area in a spinal disc. The method comprises: implanting at least one steerable lead at a placement site for stimulating a spinal disc such that the lead is disposed exterior and immediately adjacent to and circumferentially along an annulus of the spinal disc, the at least one lead including a plurality of electrodes distributed along a majority of a circumference of the annulus; connecting the lead to a signal generator; and generating electrical stimulation pulses using the generator to stimulate targeted portions of the spinal disc, wherein the stimulation of the targeted portion of the spinal disc sufficiently stimulates nerve tissue within the spinal disc to prevent communication of pain signals originating in the spinal disc without damaging tissue of the spinal disc.
摘要:
A IP telephony service allows customers to form user groups. A user group is established by collecting a plurality of identifiers that are associated with members of a group, and associating the member identifiers with a group identifier. The member identifiers could be telephone numbers of telephony devices for each of the members, or device IDs of IP telephony devices for members of the group. The group identifier could be any type of identifier, and in some instances, the group identifier could be a telephone number.
摘要:
A IP telephony service allows customers to form user groups. Each user group can include multiple members, each of whom have their own telephony device. When a member of a user group sends a messages to another member of the user group, the message is posted to a group message board so that all members of the group can view the message. This could include sending information to each of the telephony devices for all members of the group so that each telephony device could display the message on a display screen. The displayed messages could also indicate who sent each message and to whom each message was directed. As a result, each member of the group can view messages passing back and forth between all members of the group.
摘要:
Described are techniques for detecting data collisions between a first portion and a second portion of an application executing on a computer, the first portion and the second portions executing concurrently with respect to each other. While the first portion and second portion are executing, before the first portion accesses a memory location shared by the first portion and the second portion, a value stored in the memory location is captured and the first portion is delayed. While the second portion continues to execute the first portion is delayed. After a period of the first portion having been paused or slowed, the current content of the memory location is compared with the captured content to determine if there is a data collision. The first and second portions may be threads, and the capturing, delaying, and determining may be performed by code inserted to the application after it has been compiled.
摘要:
In one embodiment, a method electrically stimulates an area in a spinal disc. The method comprises: implanting at least one steerable lead at a placement site for stimulating a spinal disc such that the lead is disposed exterior and immediately adjacent to and circumferentially along an annulus of the spinal disc, the at least one lead including a plurality of electrodes distributed along a majority of a circumference of the annulus; connecting the lead to a signal generator; and generating electrical stimulation pulses using the generator to stimulate targeted portions of the spinal disc, wherein the stimulation of the targeted portion of the spinal disc sufficiently stimulates nerve tissue within the spinal disc to prevent communication of pain signals originating in the spinal disc without damaging tissue of the spinal disc.
摘要:
In one embodiment, a method electrically stimulates an area in a spinal disc. The method comprises: implanting at least one steerable lead at a placement site for stimulating a spinal disc such that the lead is disposed exterior and immediately adjacent to and circumferentially along an annulus of the spinal disc, the at least one lead including a plurality of electrodes distributed along a majority of a circumference of the annulus; connecting the lead to a signal generator; and generating electrical stimulation pulses using the generator to stimulate targeted portions of the spinal disc, wherein the stimulation of the targeted portion of the spinal disc sufficiently stimulates nerve tissue within the spinal disc to prevent communication of pain signals originating in the spinal disc without damaging tissue of the spinal disc.
摘要:
In some embodiments, a paddle lead is implanted within a patient such that the electrodes are positioned within the cervical or thoracic spinal levels. An electrode combination on a first row of electrodes can be determined that is effective for a first pain location with minimal effects on other regions of the body. The first pain location can be addressed by stimulating a first dorsal column fiber due to the relatively fine electrical field resolution achievable by the multiple columns. Then, another electrode combination on a second row of electrodes can be determined for a second pain location with minimal effects on other regions. The second pain location could be addressed by stimulating a second dorsal column fiber. After the determination of the appropriate electrodes for stimulation, the patient's IPG can be programmed to deliver pulses using the first and second rows according to the determined electrode combinations.