Load testing of IT applications is fraught with the challenges of time to market, quality of results, high cost of commercial tools, and accurately representing production like scenarios. It would help IT projects to be able to test with a small number of users and extrapolate to scenarios with much larger number of users. This in turn will cut down cycle times and costs and allow for a variety...

background: fracture load of implant-supported restorations is an important factor in clinical success. this study evaluated the effect of two techniques for screw access hole preparation on the fracture load of cement-screw retained implant-supported zirconia-based crowns. methods: thirty similar cement-screw retained implant-supported zirconia-based maxillary central incisor crowns were evalu...

the load transfer mechanisms of cable bolts differ from those for normal rebar bolts. the cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way they are laid. tendon bolts (rebar and cable) are normally evaluated for their strength and load transfer properties. the tendon strength can be evaluated by the tensi...

Power quality test facilities developed at the University of Wollongong include a 10kVA waveform generator (WG) of which the detailed design and operation has been described previously. The WG is essentially a programmable IGBT voltage source inverter controlled by a micro-controller. The original intention of this generator was to test electrical equipment under the influence of harmonic disto...

The purpose of interoperability testing is to ensure that protocol implementations communicate correctly while providing the expected services. To perform interoperability testing, conventional approaches rely on the active testing method, which stimulates the network components and observing their reactions. However, the stimuli disturb inevitably their normal operation. On the contrary, passi...

Four-ball tester is a device which is used to evaluate the resistance of extreme pressure grease performance and wear resistance with simple structure, less fuel consumption and low cost. It has been widely used in Lubricants research. In this paper, the principle and testing equipment of four-ball tester are introduced. At the same time, some shortcomings such as inconvenient load mechanism an...

BACKGROUND Routine viral load monitoring of patients on antiretroviral therapy (ART) is not affordable in most resource-limited settings. METHODS A cross-sectional study of 496 Ugandans established on ART was performed at the Infectious Diseases Institute, Kampala, Uganda. Adherence, clinical and laboratory parameters were assessed for their relationship with viral failure by multivariate log...

Starting with the burst of social media, online encyclopedias and sharing resources online, performance testing is more important than ever before. Every venture knows that it should have a fast and a reliable system. Furthermore the business needs to optimize and prepare the system to meet a higher number of users as it grows. A poor performing system can face financial losses and it could als...

The characteristics of photovoltaic (PV) panels in the field conditions are to be obtained using a fast varying load. The paper presents a simple electronic load for testing a set of PV panels using linear metal oxide field effect transistors (MOSFETs). The proposed test set up gives the current versus voltage and power versus voltage characteristics of PV panels by quickly scanning the load. D...