Community detection in complex networks by dynamical simplex evolution
V. Gudkov, V. Montealegre, S. Nussinov, and Z. Nussinov
We benchmark the dynamical simplex evolution (DSE) method with several of the currently available algorithms to detect communities in complex networks by comparing correctly identified nodes for different levels of fuzziness of random networks composed of well-defined communities. The potential bene ... [Phys. Rev. E 78, 016113 (2008)] published Wed Jul 23, 2008.
Bosonic reaction-diffusion processes on scale-free networks
Andrea Baronchelli, Michele Catanzaro, and Romualdo Pastor-Satorras
Reaction-diffusion processes can be adopted to model a large number of dynamics on complex networks, such as transport processes or epidemic outbreaks. In most cases, however, they have been studied from a fermionic perspective, in which each vertex can be occupied by at most one particle. While sti ... [Phys. Rev. E 78, 016111 (2008)] published Wed Jul 23, 2008.
A Noncyclic Method for Plastic Shakedown Analysis
W. Reinhardt
Shakedown is a cyclic phenomenon, and for its analysis it seems natural to employ a cyclic analysis method. Two problems are associated when this direct approach is used in finite element analysis. First, the analysis typically needs to be stabilized over several cycles, and the analysis of each ind ... [J. Pressure Vessel Technol. 130, 031209 (2008)] published Wed Jul 23, 2008.
Socioeconomic networks with long-range interactions
Rui Carvalho and Giulia Iori
We study a modified version of a model previously proposed by Jackson and Wolinsky to account for communication of information and allocation of goods in socioeconomic networks. In the model, the utility function of each node is given by a weighted sum of contributions from all accessible nodes. The ... [Phys. Rev. E 78, 016110 (2008)] published Tue Jul 22, 2008.
Fatigue Response of Aluminum Aircraft Structure under Engineered Residual Stress Processing
Kristina Langer, Scott VanHoogen, and Jeffery Hoover II
Advanced surface treatment methods for imparting beneficial residual compressive stresses into fatigue-prone metallic components such as laser shock processing (LSP) and low plasticity burnishing (LPB) have proven highly effective in prolonging the life of titanium turbine engine blades. The objecti ... [J. ASTM Int. 5, 101661 (2008)] published Tue Jul 22, 2008.
The Use of the Foam Index Test to Predict Air-Entraining Admixture Dosage in Concrete Containing Fly Ash: Part III---Development of a Standard Test Method: Proportions of Materials
Nathan J. Harris, Kenneth C. Hover, Kevin J. Folliard, and M. Tyler Ley
The foam index test can be useful for predicting air-entraining admixture (AEA) dosage in concrete or for evaluating AEA interaction with other mixture ingredients. The test is sensitive to several factors including total water content, water-cementitious materials ratio, ash-cementitious materials ... [J. ASTM Int. 5, 101603 (2008)] published Tue Jul 22, 2008.
Determination of the Water Diffusivity of Concrete Using Drying/Absorption Test Results
Eric Samson, Keyvan Maleki, Jacques Marchand, and Tiewei Zhang
Experimental procedures such as ASTM C1585, Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes, and ISO12572 have been recently developed to determine the rate of moisture transmission through hydrated cement systems. However, these methods do not provi ... [J. ASTM Int. 5, 101322 (2008)] published Tue Jul 22, 2008.
The Use of the Foam Index Test to Predict Air-Entraining Admixture Dosage in Concrete Containing Fly Ash: Part II---Development of a Standard Test Method: Apparatus and Procedure
Nathan J. Harris, Kenneth C. Hover, Kevin J. Folliard, and M. Tyler Ley
The foam index test can be useful for predicting air-entraining admixture (AEA) dosage in concrete or for evaluating AEA interaction with other mixture ingredients. The test is sensitive to several factors including container type and fullness, volume of materials, agitation, pipette precision, and ... [J. ASTM Int. 5, 101602 (2008)] published Tue Jul 22, 2008.
The Use of the Foam Index Test to Predict AEA Dosage in Concrete Containing Fly Ash: Part I---Evaluation of the State of Practice
Nathan J. Harris, Kenneth C. Hover, Kevin J. Folliard, and M. Tyler Ley
Foam index tests can be used to predict the air-entraining admixtures dosages for concrete containing fly ash. No industry-accepted foam index test standard exists and widely different methods have been used in research and industry. Four foam index test variants were compared to determine if variat ... [J. ASTM Int. 5, 101601 (2008)] published Tue Jul 22, 2008.
Biclique communities
Sune Lehmann, Martin Schwartz, and Lars Kai Hansen
We present a method for detecting communities in bipartite networks. Based on an extension of the k-clique community detection algorithm, we demonstrate how modular structure in bipartite networks presents itself as overlapping bicliques. If bipartite information is available, the biclique community ... [Phys. Rev. E 78, 016108 (2008)] published Mon Jul 21, 2008.
Variable Speed Control of Wind Turbines Via Memory-Based Firing Angle Sequence Adjustment
X. H. Liao, Z. Sun, Y. D. Song, Bin Li, and X. Y. Mei
Maximum electric power extraction out of available wind power is directly linked to advanced variable speed wind turbine control. The paper presents a memory-based method for variable speed adjustment of wind energy conversion systems. The fundamental idea behind the method is to use certain memoriz ... [J. Sol. Energy Eng. 130, 031019 (2008)] published Fri Jul 18, 2008.
Optimal Static Characteristics of Amphibious PAR Vehicles
Konstantin I. Matveev
Power augmented ram platform vehicle is a high-performance air-assisted amphibious transport of the new generation. The objective of this study is to determine the optimal position of the platform flap for low-speed operations on water and solid ground. The static friction of vehicle hulls on solid ... [J. Offshore Mech. Arct. Eng. 130, 034502 (2008)] published Fri Jul 18, 2008.
Nonlinear Effects on Fatigue Analysis for Fixed Offshore Structures
Oleg Gaidai and Arvid Naess
Fatigue analysis for fixed offshore structures is an important practical issue. These structures are often drag dominated, which makes the deck response a non-Gaussian process when it is assumed that the irregular waves are Gaussian. Incorporating nonlinear and non-Gaussian modeling in the fatigue a ... [J. Offshore Mech. Arct. Eng. 130, 031009 (2008)] published Fri Jul 18, 2008.
Segmentation and classification of anomalies in periodic structures
Yannick Caulier, Klaus Spinnler, Thomas Wittenberg, and Salah Bourennane
An alternative solution for surface inspection is being presented. It is based on a concerted combination of an adapted stripe-illumination principle together with an image processing approach specialized on the analysis of the obtained stripe images. This approach is capable of detecting, segmentin ... [J. Electron. Imaging 17, 033014 (2008)] published Fri Jul 18, 2008.
Evolving complex networks with conserved clique distributions
Gregor Kaczor and Claudius Gros
We propose and study a hierarchical algorithm to generate graphs having a predetermined distribution of cliques, the fully connected subgraphs. The construction mechanism may be either random or incorporate preferential attachment. We evaluate the statistical properties of the graphs generated, such ... [Phys. Rev. E 78, 016107 (2008)] published Thu Jul 17, 2008.
Partial Pore Blocking in Microfiltration Recycling of a Semisynthetic Metalworking Fluid
John E. Wentz, Shiv G. Kapoor, Richard E. DeVor, and N. Rajagopalan
In this paper, the fouling of sintered alpha-alumina membranes by an uncontaminated semisynthetic metalworking fluid (MWF) is addressed. Experimental evidence of the form of flux reduction curves, scanning electron microscope images of the membranes, and MWF particle size measurements is used to ide ... [J. Manuf. Sci. Eng. 130, 041014 (2008)] published Thu Jul 17, 2008.
A Localization Algorithm for Improving Fabrication of Curved Hull Plates in Shipbuilding
Jung Seo Park, Jong Gye Shin, Chung Min Hyun, Young Chil Doh, and Kwang Hee Ko
In this paper, a localization method is proposed for improving the curved plate fabrication process. In the curved plate forming, checking the similarity of a manufactured plate to a CAD model is a critical step, which can be done by aligning the manufactured plate to the CAD model. Although there e ... [J. Manuf. Sci. Eng. 130, 041013 (2008)] published Thu Jul 17, 2008.