Humans can discriminate among the hardness of objects by tapping their surfaces. The damped natural vibration caused by tapping and its frequency are known to be the cue for the perception of hardness. This study is an investigation of the characteristics of this perception of hardness, as induced by vibration stimuli including multiple frequency components. We performed a comparative experimen...

We consider the question of whether PPAD hardness can be based on standard cryptographic assumptions, such as the existence of one-way functions or public-key encryption. This question is particularly well-motivated in light of new devastating attacks on obfuscation candidates and their underlying building blocks, which are currently the only known source for PPAD hardness. Central in the study...

Quantum calculations of the physical properties (electronic and vibrational), based on density functional theory (DFT) method at B3LYP/6-31G** level of theory, were performed, by means of the Gaussian 09 set of programs, to investigate the effect of the addition of the radical CN on pyridazine molecules. The best geometry, the total energy, frontier molecular orbital energies (HOMO and HUMO), e...

A large testing programme of a strip steel grade, microalloyed by vanadium, titanium and niobium, was conducted. The experiment was based on combination of cold rolling, recrystallization annealing, mechanical testing, metallographic examinations, SEM and TEM analyses. Samples in the form of stripes with dimensions of 3.9×25×500 mm were rolled in several passes with the total height reduction o...

We provide several non-approximability results for deterministic scheduling problems whose objective is to minimize the total job completion time. Unless P = NP, none of the problems under consideration can be approximated in polynomial time within arbitrarily good precision. Most of our results are derived by APX-hardness proofs. We show that, whereas scheduling on unrelated machines with unit...

A standard cell library was developed using a commercial 0.24 μm, 2.5 V CMOS technology. Radiation tolerant design techniques have been employed on the layout of the cells to achieve the total dose hardness levels required by LHC experiments. The library consists of digital core cell elements as well as a number of I/O pad cells. Additionally, it includes a pair of differential driver and recei...

This paper deals with an anology of scheduling jobs on prarallel processors using Ant Colony Optimization where job values are given as a power function of the job execution times. We consider a scheduling problem in a machine of parallel processors with the objective of minimization of the total loss of job values is considered as criterion which reflects the minimization of waiting time of th...

The computational complexity of the \cluster minimization problem" is revisited [L. T. Wille and J. Vennik, J. Phys. A 18, L419 (1985)]. It is argued that the original NP-hardness proof does not apply to pairwise potentials of physical interest, such as those that depend on the geometric distance between the particles. A geometric analog of the original problem is formulated, and a new proof fo...

The purpose of this research was to develop mouth dissolve tablets of cinnarizine by effervescent, superdisintegrant addition and sublimation methods. All the three formulations were evaluated for disintegration time, hardness and friability, among these superdisintegrant addition method showed lowest disintegration time; hence it was selected for further studies. Further nine batches (B1-B9) w...

For any fixed parameter , a –spanner of a graph is a spanning subgraph in which the distance between every pair of vertices is at most times their distance in . A minimum –spanner is a –spanner with minimum total edge weight or, in unweighted graphs, minimum number of edges. General –spanners and their variants have multiple applications in the field of communication networks, distributed syste...