The conditions under which plants grow greatly fluctuate and require that plants continuously monitor their environment and adjust their developmental program accordingly. Recent advances have indicated a clear and distinct role for reactive oxygen species (ROS) in both environmental stress sensing and guiding plant development. Leaf growth is a flexible process in which the final shape and siz...

The conditions under which plants grow greatly fluctuate and require that plants continuously monitor their environment and adjust their developmental program accordingly. Recent advances have indicated a clear and distinct role for reactive oxygen species (ROS) in both environmental stress sensing and guiding plant development. Leaf growth is a flexible process in which the final shape and siz...

The flexibility and power of the human memory system are exemplified by its ability to create associations between temporally discontiguous events. Retrieved-context theory proposes that these associations are mediated by indirect associations binding the neural representation of each study event to a temporally sensitive contextual representation, which is used as a retrieval cue during memory...

Bilinear cellular aut omata (CA) are those whose next sta te may be expressed as a bilinear form (inner product) of the neighboring st ates. In this paper it is shown that, unlike linear CA , the bilinear CA over Z~ are 1r-univers al , that is, capable of simula ting any CA of the sam e dimension, and hence also capable of simula t ing any (universal) TUring machin e. Evidence is given that the...

Memory impairments are among the most troubling aspects of cognitive aging. Can older adults change how they encode events to compensate for impairments? We reveal a novel compensatory effect by examining how neural activity changes across protracted study periods. We examined oscillatory power in electroencephalographic recordings obtained while younger (18-30 years) and older (60+ years) adul...

Two experiments utilized a think/no-think paradigm to examine whether cognitive control of memories differs depending on whether they contain information with negative or neutral emotional content. During a training phase, participants learned face-word pairs (Experiment 1) or face-picture pairs (Experiment 2). In a subsequent experimental phase, participants were shown faces and told to think ...

representation of number in the parietal lobes.Cereb. Cortex, 11, 966-974.Ng, K. K., Tobin, S., & Penney, T. B. (2011). Temporalaccumulation and decision processes in the durationbisection task revealed by contingent negative variation.Front. Integr. Neurosci., 5:77.Noguchi, Y., & Kakigi, R. (2006). Time representations canbe made from nontemporal information in the ...

In episodic memory tasks, associations are formed between items presented close together in time. The temporal context model (TCM) hypothesizes that this contiguity effect is a consequence of shared temporal context rather than temporal proximity per se. Using double function lists of paired associates (e.g. A-B, B-C) presented in a random order, we examined associations between items that were...

In the temporal context model (TCM), the current state of context is used as a cue for episodic recall. Farrell & Lewandowsky (in press) argue that the lag-CRP should be examined over a much wider range of lags than have previously been considered. Farrell and Lewandowsky (in press) show that TCM predicts a characteristic change in the shape of the conditional response probability as a function...

Seed dorm'lncy. n hlch 1s thought to h a \ e e \ o l \ e d In response to unpredictable environmental hariability. has led to the existence of seed banks-populations of dormant, viable seeds in the soil. Seed banks are theoretically important to both the demography and genetic structure of plant populations. The presence of seed dormancy can also affect the evolution of traits not directly asso...