In this research, heat transfer enhancement and simultaneous effect of that on pressure drop inside condensers with twisted tape inserts are investigated. A refrigeration system is designed for attaining to maximum level of heat transfer with minimum pressure drop. The test condenser is a double pipe heat transformer with inner and outer diameter of 10.7mm and 12.7mm for internal pipe, respecti...

T cell receptor interactions with peptide/major histocompatibility complex (pMHC) ligands control the selection of T cells in the thymus as well as their homeostasis in peripheral lymphoid organs. Here we show that pMHC contact modulates the expression of CD5 by naive CD4 T cells in a process that requires the continued expression of p56(lck). Reduced CD5 levels in T cells deprived of pMHC cont...

Performing complex assembly tasks with robots requires fine-motion planners able to cope with uncertainty and contact motions, which is a difficult issue. This report proposes a method to predict the behavior of motions under contact uncertainty in order to check the feasibility of paths generated by gross-motion planning algorithms from a nominal model of the environment. This pragmatical appr...

The goal of this study was to evaluate contact area and surface pressure as a result of different suture patterns in the treatment of anterior shoulder instability caused by a Bankart lesion. Loads were applied through the humeral head to the glenoid surface in the intact shoulder and after simple suture labral repair (n=10) and vertical mattress labral repair (n=9). Peak contact pressure, mean...

We report the resultsof experimentsto study ion effects at the Advanced Light Source (ALS) in two pressure regimes. At the nominal pressure of 0.25 nTorr, we observe small vertical coherent beam oscillations for the nominal filling pattern (2.5~0 gap) that correlate with the expected ion frequency for nitrogen or carbon monoxide. The signals disappear for larger gaps in the filling pattern. We ...