In this column, we take break from our ongoing discussion of the CORBA Messaging specification to cover collocation, which is an important topic for component-based application developers. Collocation is a technique for transparently optimizing communication overhead when clients and servants are configured into the same address space. For instance, Microsoft COM [1] applications frequently use...

Unix-based operating systems feature several forms of Inter-Process Communication (IPC) including pipes, Unix domain sockets, TCP/IP sockets, FIFOs, semaphores, and signals. Although these mechanisms provide similar services, each is designed differently with varying levels of performance. To better understand how these mechanisms work and why they perform the way they do, their implementations...

&AS DESIGN SIZES have grown larger and semiconductor manufacturing processes have scaled down to extremely small feature sizes, the number of test vectors needed to thoroughly test a chip has exploded. To alleviate this potentially road-blocking issue to further technology scaling, test data compression became an active research topic in the late 1990s, and has now become a standard offering wi...

Starting from a sequence regarded as a walk through some set of values, we consider the associated loop-erased walk as a sequence of directed edges, with an edge from i to j if the loop erased walk makes a step from i to j. We introduce a coloring of these edges by painting edges with a fixed color as long as the walk does not loop back on itself, then switching to a new color whenever a loop i...

Two SAR and biomass data sets of forests with different canopy architectures were examined for commonalties regarding backscatterhiomass saturation. The SAR data were collected using the NASNJPL AIRSAR at incidence angles between 40’ and 50’ for tropical broadleaf evergreen forests in Hawaii and coniferous forests in North America and Europe. Radar signal saturation L i t s with respect to biom...

Uridine is uniquely conserved at position B in elongator tRN As and binds to A 14 to form a reversed Hoogsteen base pair which folds the dihydrouridine loop back into the core of the L-shaped molecule. On the basis of IH NMR studies, Hurd and co-workers (Hurd, R. E., Robillard, G. T., and Reid, B. R. (1977) Biochemistry 16,2095-2100) concluded that the interaction between positions Band 14 is a...

The paper focuses on the two-way relay channel (TWRC) and the multi-way wireless network with three terminals, where all three want to exchange or share data and have to do that with the help of a relay. This paper shows how it is possible to significantly decrease the number of time slots required to exchange messages between terminals in networks based on time-division multiple access (TDMA),...

In this study, a Loop Back Algorithm for component connected labeling for detecting objects in a digital image is presented. The approach is using loop back connected component labeling algorithm that helps the system to distinguish the object detected according to their label. Deferent than whole window scanning technique, this technique reduces the searching time for locating the object by fo...

--Unusual strong magnetic anisotropies in CeBi and CeSb are explained based on the anisotropic mixing mechanism between the 4f states and the valence electrons, This is consistent with the fact that no such strong anisotropy isfbund in other Ce-pnictides. Ce-pnictides are interesting materials showing various unusual anomalous properties. In CeN, Ce is believed to be tetravalency and thus non-m...

We describe experimental results on large data transfers and stable control streams over a dedicated 1Gbps channel of several hundred miles length implemented over ORNLAtlanta production OC192 link. To support file transfers at 1Gbps rates, the end hosts are equipped with SCSI hard drives in a RAID 0 configuration and dedicated NICs, which are directly connected to the router. The 1Gbps channel...