1 A comparison of ABR and UBR to support TCP tra c Sam Manthorpe and Jean-Yves Le Boudec Abstract| This paper compares the performance of ABR and UBR for providing high-speed network interconnection services for TCP tra c. We test the hypothesis that UBR with adequate bu ering in the ATM switches results in better overall goodput for TCP tra c than explicit rate ABR for LAN interconnection. Thi...

This paper explores two issues on TCP performance over ATM networks: ABR parameter tuning and performance comparison of binary mode ABR with enhanced UBR services. Of the fifteen parameters defined for ABR, two parameters dominate binary mode ABR performance: Rate Increase Factor (RIF) and Rate Decrease Factor (RDF). Using simulations, we study the effects of these two parameters on TCP over AB...

Articular cartilage repair was followed for one year in skeletally mature dogs after destabilisation by anterior cruciate ligament transection of the stifle joint (CT), abrasion of the inferior medial condyle (ABR) to bleeding bone, or anterior cruciate transection followed by chondral abrasion (CT/ABR). ABR animals formed repair cartilage at the abrasion site (ABR and CT/ABR) at six months as ...

BACKGROUND The purpose of this study was to compare the effectiveness of methods for screening for retrocochlear pathologies based on auditory evoked brainstem responses (ABRs). The study compared the sensitivity, specificity, and effectiveness of these 3 techniques. MATERIAL AND METHODS The methods were: (i) standard ABR utilizing click-evoked responses, (ii) stacked ABR based on derived-band ...

Active BCR related (ABR) gene deactivates ras-related C3 botulinum toxin substrate 1 (RAC1), which plays an essential role in regulating normal hematopoiesis and in leukemia. BCR gene, closely related to ABR, acts as a tumor suppressor in chronic myeloid leukemia and has overlapping functions with ABR. Evidence for a putative tumor suppressor role of ABR has been shown in several solid tumors, ...

In this study, hydrogen production from starch wastewater using anaerobic sludge immobilized on maghemite nanoparticles (γ-Fe2O3) was investigated. Two anaerobic baffled reactors (ABR-1 and ABR-2) were operated at organic loading rate (OLR) of 3.63±0.43 g-COD/L.d and hydraulic retention time (HRT) of 10 h. The ABR-1 was inoculated with 3.5 g-VSS/L preheated sludge at 90°C for 30 minutes. The se...

The Available Bit Rate Service (ABR) has been designed to be an eecient data transport Service for ATM networks. The standardization bodies have deened the Dynamic Generic Cell Rate Algorithm (DGCRA) as the Conformance Deenition for ABR. When setting up an ABR connection, a Cell Delay Variation Tolerance (CDVT) has to be negotiated for the DGCRA. In this report we study the CDVT dimensioning fo...