Rating-transition-probability models and Comprehensive Capital Analysis and Review stress testing: methodologies and implementation

2016 ◽  
Author(s):  
Bill Huajian Yang ◽  
Zunwei Du
Keyword(s):  
Stress Testing ◽  
Transition Probability ◽  
Probability Models

scholarly journals Validation of default probability models: A stress testing approach

2016 ◽  
Vol 47 ◽  
pp. 70-85 ◽  
Author(s):  
Fábio Yasuhiro Tsukahara ◽  
Herbert Kimura ◽  
Vinicius Amorim Sobreiro ◽  
Juan Carlos Arismendi Zambrano
Keyword(s):  
Stress Testing ◽  
Default Probability ◽  
Probability Models ◽  
Testing Approach

scholarly journals Cell Cycle Commitment and the Origins of Cell Cycle Variability

2021 ◽  
Vol 9 ◽  
Author(s):  
Robert F. Brooks
Keyword(s):  
Cell Cycle ◽  
Dynamic Behavior ◽  
Transition Probability ◽  
Molecular Networks ◽  
Probability Models ◽  
Clonal Population ◽  
Restriction Point ◽  
The Relationship ◽  
Mitogenic Signal

Exit of cells from quiescence following mitogenic stimulation is highly asynchronous, and there is a great deal of heterogeneity in the response. Even in a single, clonal population, some cells re-enter the cell cycle after a sub-optimal mitogenic signal while other, seemingly identical cells, do not, though they remain capable of responding to a higher level of stimulus. This review will consider the origins of this variability and heterogeneity, both in cells re-entering the cycle from quiescence and in the context of commitment decisions in continuously cycling populations. Particular attention will be paid to the role of two interacting molecular networks, namely the RB-E2F and APC/CCDH1 “switches.” These networks have the property of bistability and it seems likely that they are responsible for dynamic behavior previously described kinetically by Transition Probability models of the cell cycle. The relationship between these switches and the so-called Restriction Point of the cell cycle will also be considered.

Modeling of vehicle driving conditions using transition probability models

2011 ◽  
Author(s):  
Kevin McDonough ◽  
Ilya Kolmanovsky ◽  
Dimitar Filev ◽  
Diana Yanakiev ◽  
Steve Szwabowski ◽  
...  
Keyword(s):  
Transition Probability ◽  
Probability Models ◽  
Driving Conditions

scholarly journals Biological integrity enhances the qualitative effectiveness of conditional mice-oak mutualisms

2021 ◽  
Author(s):  
Mario Díaz ◽  
Teresa Morán-López ◽  
Jesús Sánchez-Dávila ◽  
Ignasi Torre ◽  
Alvaro Navarro-Castilla ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Predation Risk ◽  
Large Scale ◽  
Transition Probability ◽  
Joint Effect ◽  
Tree Regeneration ◽  
Probability Models ◽  
Scatter Hoarding ◽  
Extrinsic Factors ◽  
Dispersal Effectiveness

Scatter-hoarding decisions by rodents are key for the long-term maintenance of scattered tree populations. Decisions are determined by seed value, competition and predation risk, so that they can be influenced by the integrity of the biological system composed by trees, rodents, ungulate competitors, and rodent predators. We manipulate and model the oak-mice interaction in a Spanish dehesa, an anthropogenic savanna system suffering chronic tree regeneration failure, and quantify the joint effect of intrinsic and extrinsic factors on acorn dispersal effectiveness. First, we conducted a large-scale cafeteria field experiment, where we modified ungulate presence and predation risk, and followed mouse scatter-hoarding decisions under contrasting levels of moonlight and acorn availability. Then, we estimated the net effects of competition and risk by means of transition probability models that simulated mouse scatter-hoarding decisions according to the environmental context.  Our results show that suboptimal conditions for mice balance the interaction towards the mutualism as they force mice to forage less efficiently. Under stressful conditions (predation risks and presence of ungulates), lack of antipredatory cover around dehesa trees limited transportation of acorns, but also precluded mice activities outside tree canopies. As a result, post-dispersal predation rates were reduced and large acorns had a higher probability to survive. Our work shows that inter-specific interactions preventing efficient foraging by scatter-hoarders benefitted seed dispersal. Therefore, the maintenance of the full set of producers, consumers, dispersers and predators in ecosystems is key for promoting seed dispersal effectiveness in conditional mutualisms.

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