Jumper

Abstract: A fiber optic distribution system provides a frame having several bays for receiving connector modules, associated jumper organizers, and upper and lower troughs for conveying jumper fibers between adjacent bays. The jumper organizers are constructed such that interbay jumpers need not undergo more than two continuous bends of 90°, and further easily store excess jumper slack, such as is required to avoid modal noise, even when both ends of the jumper are terminated in the same tray or cabinet. Each connector module has a plurality of connector trays pivotally attached to a cabinet using a swivel bracket which is located adjacent a gap in the tray sidewall; this allows placement of the incoming fibers into the tray without the need for threading the fibers through a hole, and also minimizes fiber stress during pivoting movement of the trays. Front and back plane storage areas are provided for receiving excess slack from both incoming and jumper fibers, and a passageway may join these areas to allow customized fiber circuit paths on the tray. Boot biasing ribs are provided on the tray, along with radius limiting ribs, to maintain a proper bend radius of the jumper fibers as they exit the tray. A novel coupling adapter is also provided which flips one end of the interconnection device upward to allow easier installation of a connector plug.

Abstract: Training volume and body composition have been suggested as risk factors for jumper’s knee among athletic youth, but research is lacking. The aim of this 4-year prospective cohort study was to examine the relationship between training and competition load, body composition, and risk for developing jumper’s knee. Participants are elite volleyball players, aged 16–18 years. Training and competition load was recorded continuously and body composition semiannually. Jumper’s knee was diagnosed on a standardized clinical examination. We recruited 141 healthy students (69 males and 72 females), and 28 developed jumper’s knee (22 boys and six girls). In a multivariate analyses, boys had three to four times higher risk compared with girls. Volleyball training had an odds ratio (OR) 1.72 (1.18–2.53) for every extra hour trained, and match exposure was the strongest sportsrelated predictor for developing jumper’s knee with an OR of 3.88 (1.80–8.40) for every extra set played per week. We did not detect any significant differences between the groups in body composition at the time of inclusion or in the change of body composition during the study period. Conclusion, male gender, a high volume of volleyball training and match exposure were risk factors for developing jumper’s knee.

Abstract: A multilayer rigid-flex circuit board having two or more conductive layers, with at least one rigid circuit board (70,80) electrically connected to at least one flexible jumper connector (75) or intercircuit connector circuit board, is disclosed. A conductive layer (71,82) of each of the rigid circuit boards (70,80) is connected electrically and mechanically to a conductive layer (76) of the flexible jumper connector (75) by an interconnecting adhesive layer (85,90). The interconnecting adhesive layer (85,90) comprises a conductive adhesive material having a plurality of deformable, electrically conductive particles (87,92) dispersed substantially throughout a non-conductive adhesive (86,91). The fabricated multilayer circuit boards have interconnections which are reliable, heat resistant, and capable of withstanding the mechanical strain of the interconnection and the thermal cycling and typical circuit board fabrication, finishing and assembly processes. Such a rigid-flex circuit is typically used in an environment where space is limited. During installation, the flexible connector (75) is generally bent to adapt to the dimensional constraint of the surroundings.

Abstract: A computer program permits a user to simulate configuring add-in boards for a computer system. A board may be "pulled" from an inventory list for inspection, and may be "inserted" into any legal slot in the computer system. The program can automatically generate any permissible configurations for the board, i.e., configuration of the board's address resource allocations that avoid conflicts with the address resource allocations of other, already-installed boards. The user may select from among permissible configurations; for a selected configuration, the user may display to screen or printer a drawing of the switch- and jumper settings on the board that are needed to implement the selected configuration.