An experimental and modeling study on the role of damage cascade formation in nanocrystalization of ion-irradiated Ni52.5Nb10Zr15Ti15Pt7.5 metallic glass

2010 ◽  
Vol 63 (11) ◽  
pp. 1045-1048 ◽  
Author(s):  
Michael Myers ◽  
E.G. Fu ◽  
Michelle Myers ◽  
Haiyan Wang ◽  
Guoqiang Xie ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Damage Cascade ◽  
Modeling Study

DEVELOPMENT OF FEEDFORWARD RECEPTIVE FIELD STRUCTURE OF A SIMPLE CELL AND ITS CONTRIBUTION TO THE ORIENTATION SELECTIVITY: A MODELING STUDY

2005 ◽  
Vol 15 (01n02) ◽  
pp. 55-70 ◽  
Author(s):  
AKHIL R GARG ◽  
KLAUS OBERMAYER ◽  
BASABI BHAUMIK
Keyword(s):  
Receptive Field ◽  
Field Structure ◽  
Orientation Selectivity ◽  
Simple Cell ◽  
Homogeneous State ◽  
Synaptic Efficacy ◽  
Synaptic Interactions ◽  
Experimental Findings ◽  
Modeling Study

Recent experimental studies of hetero-synaptic interactions in various systems have shown the role of signaling in the plasticity, challenging the conventional understanding of Hebb's rule. It has also been found that activity plays a major role in plasticity, with neurotrophins acting as molecular signals translating activity into structural changes. Furthermore, role of synaptic efficacy in biasing the outcome of competition has also been revealed recently. Motivated by these experimental findings we present a model for the development of simple cell receptive field structure based on the competitive hetero-synaptic interactions for neurotrophins combined with cooperative hetero-synaptic interactions in the spatial domain. We find that with proper balance in competition and cooperation, the inputs from two populations (ON/OFF) of LGN cells segregate starting from the homogeneous state. We obtain segregated ON and OFF regions in simple cell receptive field. Our modeling study supports the experimental findings, suggesting the role of synaptic efficacy and the role of spatial signaling. We find that using this model we obtain simple cell RF, even for positively correlated activity of ON/OFF cells. We also compare different mechanism of finding the response of cortical cell and study their possible role in the sharpening of orientation selectivity. We find that degree of selectivity improvement in individual cells varies from case to case depending upon the structure of RF field and type of sharpening mechanism.

Enhanced intermediate-temperature CO2splitting using nonstoichiometric ceria and ceria–zirconia

2017 ◽  
Vol 19 (37) ◽  
pp. 25774-25785 ◽  
Author(s):  
Zhenlong Zhao ◽  
Mruthunjaya Uddi ◽  
Nikolai Tsvetkov ◽  
Bilge Yildiz ◽  
Ahmed F. Ghoniem
Keyword(s):  
Critical Role ◽  
Intermediate Temperature ◽  
Modeling Study

Combined experimental and modeling study of CO2splitting on CeO2and Ce0.5Zr0.5O2reveals the critical role of CO32−adsorbate for the splitting chemistry.

Role of tensile elastostatic loading on atomic structure and mechanical properties of Zr55Cu30Ni5Al10 bulk metallic glass

2019 ◽  
Vol 753 ◽  
pp. 218-223 ◽  
Author(s):  
Majid Samavatian ◽  
Reza Gholamipour ◽  
Ahmad Ali Amadeh ◽  
Shamsoddin Mirdamadi
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Atomic Structure
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