photoreactor using solar radiation. the effect of various parameters such as ph, initial concentration of pollutant, catalyst dose, oxidant, and time variation were studied. the determination of the best catalyst was studied amongst the four catalysts (tio2, zno, psa and ssa) .the kinetics of degradation of isooctane was also studied. the results showed that tio2 was the best catalyst with a de...

Dziembowski, Pietrzak, and Wichs (ICS–2010) introduced the notion of non-malleable codes as a relaxation of the error-correcting codes. Intuitively, a non-malleable code ensures that the tampered codeword encodes the original message or a message that is entirely independent of the original message. One of the fundamental research directions in the field of non-malleable code construction consi...

The previously published procedure for calculation of rate constants associated with the death of microbial cells is shown to be so sensitive to variation in experimental data as to render it impractical for this application. The only obvious modification to the published procedure met with only limited success. It is concluded that a fresh search should be undertaken for the solution to this f...

There is a great deal of interest in the use of nanostructured heterogeneous catalysts, particularly those based on expensive precious metals, in order to maximise the surface to volume ratio of the catalyst, potentially reducing the cost without sacrificing performance. When there is an abundance of reactants available, the effective reactivity will depend on the surface density of the catalyt...

A binary symmetric channel (BSC) is a noisy communication channel that flips each bit independently with some fixed error probability 0 < p < 1/2. Crépeau and Kilian (FOCS 1988) showed that oblivious transfer, and hence general secure two-party computation, can be unconditionally realized by communicating over a BSC. There has been a long line of works on improving the efficiency and generality...

With the initial design of WEBRC, as described in the -00 and -01 IETF RMT building block drafts [1, 2], the server output rate varies in time with period TSD (recommended to be 10 seconds). The variation is quite significant; when the recommended multiplicative decrease value P = 0.75 is used, it causes the average output rate to be at least 13.1% less than the peak rate. This document describ...

The TEN-34 network delivers today stable highspeed networking services to the European R&D community. At the same time research into more advanced backbone technologies is being carried out with the goal of making more sophisticated services such as bandwidth on demand available on the TEN-34 network. This paper describes the first phase of the experiments on advanced backbone technologies. A s...

We consider probability distributions with constant rate on partially ordered sets, generalizing distributions in the usual reliability setting 0,∞ ,≤ that have constant failure rate. In spite of the minimal algebraic structure, there is a surprisingly rich theory, including moment results and results concerning ladder variables and point processes. We concentrate mostly on discrete posets, par...

When optimizing variable dose rate VMAT (VDR) beams, the leaf positions and the MU of each control point are optimized simultaneously (Figure 1). Since the MU is not allowed to be individually optimized for each control point for a constant dose rate VMAT (CDR) beam (Figure 2), it is likely that the plan quality is reduced compared to a VDR beam with the same angle settings. To obtain a good qu...