We propose a new approach for practical secure two-party computation (2PC) achieving security in the presence of malicious adversaries. Given a program to compute, the idea is to identify subcomputations that depend on only one or neither of the parties’ private inputs. Such computations can be secured at significantly lower cost, using different protocol paradigms for each case. We then show h...

the basis of the ohmic heating process is the transmission of alternating electric current through multi-phase solutions that is followed by heat generation due to particle resistance to the transmitted electric current. throughout the present study, simultaneous transfer of heat and electricity was modeled in a two-phase system of solid-liquid food to investigate the critical factors affecting...

Concurrent transactions during their execution life acquire a number of attributes. We call them dynamic attributes of transactions. We have used them to develop a concurrency control mechanism, called KRISHNA, using two-phase locking policy. To establish the usefulness of dynamic attributes in developing concurrency control mechanisms and to investigate the behavior of KRISHNA, we have studied...

Using simulation, we compare the performance of the Basic Timestamp, the Multiple Version Time&amp, and the Two-Phase Locking concurrency control algorithms. We find that in every system configuration ve have simulated the Multiple Version Timestamp algorithm performs only marginally better than the Basic Timestamp algorithm. In addition, we find that when the average transaction size is small,...

The steady state and dynamic behavior of two-phase systems in physical equilibrium is investigated. The autonomous and non-autonomous systems are considered. The pseudo-arclength bifurcation technique reveals steady state multiplicity patterns not previously observed, including isola and mushroom patterns. It is shown that degenerate singular points of codimension 2, which violate the non-singu...

Multiversion two-phase locking (MV2PL) has been incorporated in some commercial transaction processing systems to support the serializable execution of queries. A drawback to this algorithm is the potentially high cost that it adds to maintain and access prior versions of data. In this paper, we present a new multiversion locking algorithm, multiversion query locking (MVQL), that reduces the co...

Database systems for real-time applications must satisfy timing constraints associated with transactions, in addition to maintaining data consistency. In addition to real-time requirements, security is usually required in many applications. Multilevel security requirements introduce a new dimension to transaction processing in real-time database systems. In this paper , we argue that due to the...

A hybrid of evolutionary programming (EP) and a deterministic optimization procedure is applied to a series of nonlinear and quadratic optimization problems. The hybrid scheme is compared with other existing schemes such as EP alone, two-phase (TP) optimization, and EP with a non-stationary Penalty function (NS-EP). The results indicate that the hybrid method can outperform the other methods wh...

We present a new version of the sequential discontinuous Galerkin method introduced in [25] for two-phase immiscible incompressible flows in heterogeneous porous media with a discontinuous capillary field. Here, a new implementation of the extended interface condition, that does not use the threshold saturation value at the interface and permits treatment of different residual saturations in di...