Algebraic reconstruction techniques (ART) are iterative procedures for reconstructing objects from their projections. It is proven that ART can be computationally efficient by carefully arranging the order in which the collected data are accessed during the reconstruction procedure and adaptively adjusting the relaxation parameters. In this paper, an adaptive algebraic reconstruction technique ...

In this note, we revisit the relaxation and rounding technique employed several times in algorithmic mechanism design. We try to introduce a general framework which covers the most significant algorithms in mechanism design that use the relaxation and rounding technique. We believe that this framework is not only a generalization of the existing algorithms but also can be leveraged for further ...

The analytic center cutting plane method (ACCPM) is one of successful methods to solve nondifferentiable optimization problems. In this paper, ACCPM is used to accelerate Lagrangian relaxation procedure for solving a vehicle routing problem with time windows (VRPTW). First, a basic cutting plane algorithm and its relationship with a column generation technique is clarified. Then, the proposed m...

background & aim: pain is a major problem after burn injury. therapeutic practices do not provide suffi-cient pain relief for patients with burn. therefore, non-pharmacological interventions such as muscle relaxa-tion and mental imagery can be effective in reducing pain. this study aimed to compare the effects of mus-cle relaxation and mental imagery techniques on pain intensity in patients wit...

background: fatigue is one of the important factors in nursing performance because it affects the quality of care provided to the patients. in this regard, some complementary interventions such as benson relaxation techniques may relieve fatigue. this study aimed to evaluate the effect of benson relaxation on fatigue of nurses working in intensive care units. methods: this is an experimental st...

Image segmentation by energy{minimizing active contour models (snakes) su ers from the fact that classic numerical optimization algorithms nd only local energy minima, which makes the approach very sensible to noise and initialization. This paper presents a robust adaptive snake model using a stochastic relaxation technique, Simulated Annealing (SA), to nd a global energy minimum in noisy cine ...

We introduce a modified phase field crystal (MPFC) technique that self-consistently incorporates rapid strain relaxation alongside the usual plastic deformation and multiple crystal orientations featured by the traditional phase field crystal (PFC) technique. Our MPFC formalism can be used to study a host of important phase transformation phenomena in material processing that require rapid stra...

objective behavioral interventions such as relaxation training and biofeedback are some of the most effective interventions for management of migraine headaches. in this study we evaluated the utility of biofeedback-assisted progressive muscle relaxation training (prt) in the treatment of migraine. materials and methods in this prospective study, twenty patients (12-18 years old) with a confirm...

abstract background: fatigue is the most common and highly disabling symptom of multiple sclerosis (ms) that has negative effects on employment, the process of socialization, compliance with the disease, and other factors effective on activities of daily living. the usage of complementary and alternative medicine methods in ms patients is higher than in the general population. however, there is...