Duplex ultrasound is widely used to detect vascular dysfunction after kidney transplantation. We describe musical murmurs found in renal allografts. A 29-year-old man with an increase in serum creatinine 1 month after cadaveric kidney transplantation was referred for duplex ultrasound to exclude perfusion dysfunction. Renal arterial and venous circulation was normal. However, during Doppler spe...

Johnson and Livingston have characterized peripheral structures in homomorphs of knot groups. We extend their approach to the case of links. The main result is an algebraic characterization of all possible peripheral structures in certain homomorphic images of link groups.

The response of apple cultivars to powdery mildew attack – Podosphaera leucotricha (Ell. et Everh.) Salm. – on leaves and shoots, for seven years (1990-1996), emphasised a large variability for this character existing within 75 apple varieties tested in an experimental field at the Fruit Research Station in Cluj-Napoca, Central Transylvania, Romania. The experimental results confirmed that the ...

K42 is an open-source research kernel for cache-coherent 64-bit multiprocessor systems. K42 focuses on achieving good performance and scalability, providing a customizable and maintainable system, and being accessible to a large community through an open source development model. To that end, K42 fully supports the Linux API and ABI and uses Linux libraries, device drivers, file systems, and ot...

A covariant generalization of the onedimensional cascade model for quark fragmentation functions is presented, so as to include the transverse momentum behaviour and the possibility to produce different particles at different vertices along the chain. In the scaling limit the exact solution is given, if the primordial function is of the type az ~1. T(Pr). For the more general case of factorizin...

Teaching is enjoyable and rewarding in many ways, and I am excited by the opportunity toworkwith students throughout my future career. Mymain areas of interest are computer systems, including distributed systems, operating systems, cloud systems, and computer networking. One of themost interesting parts of teaching computer systems comes in unraveling the layers and abstractions of complex syst...

We characterize the complexity of several typical problems in propositional default logics. In particular, we examine the complexity of extension membership, extension existence, and extension entailment problems. We show that the extension existence problem is X; complete, even for semi-normal theories, and that the extension membership and entailment problems are X; complete and II; complete ...