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A comparison of two global optimization algorithms with sequential niche technique for structural model updating

Faisal Shabbir, Piotr Omenzetter, H. Felix Wu, Tzu-Yang Yu, Andrew L. Gyekenyesi, Peter J. Shull
2014 Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014  
To counter this problem, a combination of GOA with sequential niche technique (SNT) has been proposed in this research which systematically searches the whole solution space.  ...  A dynamically tested full scale pedestrian bridge is taken as a case study.  ...  To alleviate this problem, a combination of sequential niche technique (SNT) with GOAs is proposed in this study.  ... 
doi:10.1117/12.2042134 fatcat:drkcg5jts5hrniynrixmtsj7ou

A Niching Memetic Algorithm for Multi-Solution Traveling Salesman Problem

Ting Huang, Yue-Jiao Gong, Sam Kwong, Hua Wang, Jun Zhang
2019 IEEE Transactions on Evolutionary Computation  
The proposed algorithm is characterized by a niche preservation technique to enable the parallel search of multiple optimal solutions; an adaptive neighborhood strategy to balance the exploration and exploitation  ...  To evaluate the performance of the proposed algorithm, we conduct comprehensive experiments on a recently published multi-solution optimization test suite.  ...  INTRODUCTION T RAVELING salesman problem (TSP) [1] , [2] is one of the most intensively studied combinational optimization problems.  ... 
doi:10.1109/tevc.2019.2936440 fatcat:txbqxvm54rflvmrozhmxyiymgi

Finding multiple global optima exploiting differential evolution's niching capability

Michael G. Epitropakis, Vassilis P. Plagianakos, Michael N. Vrahatis
2011 2011 IEEE Symposium on Differential Evolution (SDE)  
The new mutation strategies incorporate spatial information about the neighborhood of each potential solution and exhibit a niching formation, without incorporating any additional parameter.  ...  Experimental results on eight well known multimodal functions and comparisons with some state-of-the-art algorithms indicate that the proposed mutation strategies are competitive and very promising, since  ...  ACKNOWLEDGE The authors would like to thank the European Social Fund (ESF), Operational Program for EPEDVM and particularly the Program Herakleitos II, for financially supporting this work.  ... 
doi:10.1109/sde.2011.5952058 dblp:conf/sdiev/EpitropakisPV11 fatcat:vgooxpu7l5gbvegnctkdkjf65e

The Foundation for Engineering a Pancreatic Islet Niche

Smit N. Patel, Clayton E. Mathews, Rachel Chandler, Cherie L. Stabler
2022 Frontiers in Endocrinology  
While highly promising, islet-on-a-chip prototypes must evolve their utility, adaptability, and adoptability to ensure broad and reproducible use.  ...  Summarizing our contemporary understanding of the unique and critical features of the pancreatic islet can inform engineering design criteria.  ...  While this does not create a problem for 2D cell culture techniques, it does restrict the utilization of MPS for 3D organoids with sizes ranging from 50 µm to 1 mm (111, 188) .  ... 
doi:10.3389/fendo.2022.881525 fatcat:sp6ukkmojze7ba4rmpfzve55ge

A Sequential Niche Multimodal Conformation Sampling Algorithm for Protein Structure Prediction [article]

Yuhao Xia, Chunxiang Peng, Xiaogen Zhou, Guijun Zhang
2020 bioRxiv   pre-print
This study investigates whether these two problems can be alleviated by a sequential niche technique without loss of accuracy.  ...  Results: A sequential niche multimodal conformation sampling algorithm for protein structure prediction (SNfold) is proposed in this study.  ...  Funding This work has been supported by the National Nature Science Foundation of China (No. 61773346) and the Key Project of Zhejiang Provincial Natural Science Foundation of China (No.  ... 
doi:10.1101/2020.12.29.424663 fatcat:ioym7dyrpfbihkabb6546edlzu

Multimodal optimization using niching differential evolution with index-based neighborhoods

Michael G. Epitropakis, Vassilis P. Plagianakos, Michael N. Vrahatis
2012 2012 IEEE Congress on Evolutionary Computation  
The new mutation strategies are evaluated on eight well-known and widely used multimodal problems and their performance is compared against five state-of-the-art algorithms.  ...  To alleviate this problem, instead of computing the real nearest neighbor, we incorporate an indexbased neighborhood into the mutation strategies.  ...  ACKNOWLEDGE The authors would like to thank the European Union (European Social Fund ESF) and Greek national funds through the Operational Program "Education and Lifelong Learning" of the National Strategic  ... 
doi:10.1109/cec.2012.6256480 dblp:conf/cec/EpitropakisPV12 fatcat:s6mdascz5zhnjplqy2u7az5po4

Cell-Biomaterial Interactions Reproducing a Niche [chapter]

Silvia Scaglione, Paolo Giannoni, Rodolfo Quarto
2011 Advances in Regenerative Medicine  
The phase-separation technique is based on thermodynamic demixing of a homogeneous polymer-solvent solution into a polymer-rich phase and a polymer-poor phase, usually by either exposure of the solution  ...  However, a number of practical problems still persist, such as the difficulty in controlling the in vivo degradation of bio-resorbable polymers, low efficiency of cell seeding, cytotoxicity of the breakdown  ... 
doi:10.5772/26631 fatcat:72nlbhxq55ei3ot5gqjqgz7eh4

Trophic niche-space imaging, using resource and consumer traits

Leopold A. J. Nagelkerke, Axel G. Rossberg
2014 Theoretical Ecology  
Results further suggest that trophic niche space has a pseudo-Euclidean geometry, meaning that link strength decays with distance in some dimensions of trophic niche space, while it increases with distance  ...  The strength of trophic (feeding) links between two species depends on the traits of both the consumer and the resource.  ...  To support the conclusions of the present study, however, our conservative choices were sufficient.  ... 
doi:10.1007/s12080-014-0229-5 fatcat:d45xzpvqivgj5d55u32pdk5b6q

Remodeling the Human Adult Stem Cell Niche for Regenerative Medicine Applications

Silvana Bardelli, Marco Moccetti
2017 Stem Cells International  
Thus, translational medicine aims at optimizing in vitro or in vivo the various components and complex architecture of the niche to exploit its therapeutic potential.  ...  Comprehensive studies over the last decades helped to clarify the critical components of stem cell niches that include cellular, extracellular, biochemical, molecular, and physical regulators.  ...  Conflicts of Interest The authors declare that there is no conflict of interest regarding the publication of this paper.  ... 
doi:10.1155/2017/6406025 pmid:29090011 pmcid:PMC5635271 fatcat:3rnxe6efknebphwqomp2grpaiu

Elements of the niche for adult stem cell expansion

Patricia A Redondo, Marina Pavlou, Marilena Loizidou, Umber Cheema
2017 Journal of Tissue Engineering  
In this review, we overview specific elements of the biomimetic niche and how recreating such elements can help in vitro propagation of adult stem cells.  ...  However, it is technically challenging, since adult stem cell removal from their native microenvironment has negative repercussions on their sustainability.  ...  studied in SaCs. 175 Further studies on mechanical regulation of stemness will allow a deeper understanding on the molecular mechanisms of geometry and stiffness translation to cells.  ... 
doi:10.1177/2041731417725464 pmid:28890779 pmcid:PMC5574483 fatcat:cfbnnc2ubrfvfljiuqteotvqhe

Ant-mediated seed dispersal does not facilitate niche expansion

Robert J. Warren, Itamar Giladi, Mark A. Bradford
2010 Journal of Ecology  
Whereas classic niche theory is based on the contraction of the niche via negative interactions, facilitative niche theory suggests that mutualisms can expand the niche via positive interactions.  ...  Blackwell Science, Oxford Bestelmeyer, B.T., Agosti, D., Alonso, L.E., Brandao, C.R.F., Brown, W.L., Delabie, J.H.C. & Silvestre, R. (2000) Field techniques for the study of ground-dwelling ants.  ... 
doi:10.1111/j.1365-2745.2010.01694.x fatcat:h3keandl35c5poooiikjitnhty

Generation of multiple pharmacophore hypotheses using multiobjective optimisation techniques

Simon J. Cottrell, Valerie J. Gillet, Robin Taylor, David J. Wilton
2004 Journal of Computer-Aided Molecular Design  
The ensemble methods tend to produce a large number of hypotheses and require considerable effort to analyse the results, whereas methods that vary conformation on-the-fly typically generate a single solution  ...  The method is based on multiobjective evolutionary algorithm techniques and is designed to search for an ; Fax +44 1142 780 300 2 ensemble of diverse yet plausible overlays which can then be presented  ...  The globally optimal tradeoff surface of a multiobjective problem can contain a potentially infinite number of Pareto optimal solutions, and the task is usually to provide an accurate and useful representation  ... 
doi:10.1007/s10822-004-5523-7 pmid:15865060 fatcat:kvnhdysh4rdanphh7tgaekelbu

Integrating Geographic Information Systems and Ecological Niche Modeling into Disease Ecology: A Case Study of Bacillus anthracis in the United States and Mexico [chapter]

Jason K. Blackburn
2010 Emerging and Endemic Pathogens  
I then provide a primer on ecological niche theory and apply ecological niche modeling to estimate the potential geographic distribution of B. anthracis on the landscape of the contiguous United States  ...  Spatial clustering statistics are reviewed in the context of outbreak epidemiology and potential mechanical vector transmission.  ...  Black arrows indicate areas in which significant clusters of outbreaks disappeared during the study period; the red arrow indicates an area in which a cluster developed in the latter decades of the study  ... 
doi:10.1007/978-90-481-9637-1_7 fatcat:ldl7s7dn6zhcvdb2vtobllsqk4

Building an Artificial Stem Cell Niche: Prerequisites for Future 3D-Formation of Inner Ear Structures-Toward 3D Inner Ear Biotechnology

Simon C. de Groot, Karen Sliedregt, Peter Paul G. van Benthem, Marcelo N. Rivolta, Margriet A. Huisman
2019 The Anatomical Record  
However, two-dimensional cultures of stem cells are of limited use when studying the mechanism of pathogenesis of diseases and the feasibility of a treatment.  ...  Recent work suggests that although other factors play a role, the extracellular matrix (ECM), including its topography, is crucial to mimic a stem cell niche in vitro and to drive stem cells toward the  ...  ACKNOWLEDGMENTS The authors would like to thank Mr Clemens Ressenaar and Ms G.E. Hoogendoorn MSc, for creating Fig  ... 
doi:10.1002/ar.24067 pmid:30635991 pmcid:PMC7065153 fatcat:3nhinmbdnva7vndggyiz2goxd4

Cytometry by Time-of-Flight Shows Combinatorial Cytokine Expression and Virus-Specific Cell Niches within a Continuum of CD8+ T Cell Phenotypes

Evan W. Newell, Natalia Sigal, Sean C. Bendall, Garry P. Nolan, Mark M. Davis
2012 Immunity  
These data also showed much greater complexity in the CD8 + T cell compartment than previously appreciated, including a nearly combinatorial pattern of cytokine expression, with distinct niches occupied  ...  This large degree of functional diversity even between cells with the same specificity gives CD8 + T cells a remarkable degree of flexibility in responding to pathogens.  ...  ACKNOWLEDGMENTS The authors would like to thank D. Parks  ... 
doi:10.1016/j.immuni.2012.01.002 pmid:22265676 pmcid:PMC3752833 fatcat:oa46o5bparfwxntxoij6oxwc4m
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