Variational learning for Generalized Associative Functional Networks in modeling dynamic process of plant growth

2009 ◽  
Vol 4 (3) ◽  
pp. 163-176 ◽  
Author(s):  
Han-Bing Qu ◽  
Bao-Gang Hu
2015 ◽  
Vol 58 ◽  
pp. 61-70 ◽  
Author(s):  
Paul B. Larsen

Ethylene is the simplest unsaturated hydrocarbon, yet it has profound effects on plant growth and development, including many agriculturally important phenomena. Analysis of the mechanisms underlying ethylene biosynthesis and signalling have resulted in the elucidation of multistep mechanisms which at first glance appear simple, but in fact represent several levels of control to tightly regulate the level of production and response. Ethylene biosynthesis represents a two-step process that is regulated at both the transcriptional and post-translational levels, thus enabling plants to control the amount of ethylene produced with regard to promotion of responses such as climacteric flower senescence and fruit ripening. Ethylene production subsequently results in activation of the ethylene response, as ethylene accumulation will trigger the ethylene signalling pathway to activate ethylene-dependent transcription for promotion of the response and for resetting the pathway. A more detailed knowledge of the mechanisms underlying biosynthesis and the ethylene response will ultimately enable new approaches to be developed for control of the initiation and progression of ethylene-dependent developmental processes, many of which are of horticultural significance.


2014 ◽  
Vol 24 (1) ◽  
pp. 11-18
Author(s):  
Andrea Bell ◽  
K. Todd Houston

To ensure optimal auditory development for the acquisition of spoken language, children with hearing loss require early diagnosis, effective ongoing audiological management, well fit and maintained hearing technology, and appropriate family-centered early intervention. When these elements are in place, children with hearing loss can achieve developmental and communicative outcomes that are comparable to their hearing peers. However, for these outcomes to occur, clinicians—early interventionists, speech-language pathologists, and pediatric audiologists—must participate in a dynamic process that requires careful monitoring of countless variables that could impact the child's skill acquisition. This paper addresses some of these variables or “red flags,” which often are indicators of both minor and major issues that clinicians may encounter when delivering services to young children with hearing loss and their families.


VASA ◽  
2020 ◽  
Vol 49 (4) ◽  
pp. 333-337 ◽  
Author(s):  
Francisco Leonardo Galastri ◽  
Leonardo Guedes Moreira Valle ◽  
Breno Boueri Affonso ◽  
Marcela Juliano Silva ◽  
Rodrigo Gobbo Garcia ◽  
...  

Summary: COVID-19 is a recently identified illness that is associated with thromboembolic events. We report a case of pulmonary embolism in a patient with COVID-19, treated by catheter directed thrombectomy. A 57 year old patient presented to the emergency center with severe COVID-19 symptoms and developed massive pulmonary embolism. The patient was treated with catheter directed thrombolysis (CDT) and recovered completely. Coagulopathy associated with COVID-19 is present in all severe cases and is a dynamic process. We describe a case of massive/high risk pulmonary embolism, in a patient with COVID-19 receiving full anticoagulation, who was treated by percutaneous intervention. CDT can be an additional therapeutic option in patients with COVID-19 and pulmonary embolism that present with rapid clinical collapse.


2003 ◽  
Vol 14 (3) ◽  
pp. 181-190 ◽  
Author(s):  
Walter Sturm

Abstract: Behavioral and PET/fMRI-data are presented to delineate the functional networks subserving alertness, sustained attention, and vigilance as different aspects of attention intensity. The data suggest that a mostly right-hemisphere frontal, parietal, thalamic, and brainstem network plays an important role in the regulation of attention intensity, irrespective of stimulus modality. Under conditions of phasic alertness there is less right frontal activation reflecting a diminished need for top-down regulation with phasic extrinsic stimulation. Furthermore, a high overlap between the functional networks for alerting and spatial orienting of attention is demonstrated. These findings support the hypothesis of a co-activation of the posterior attention system involved in spatial orienting by the anterior alerting network. Possible implications of these findings for the therapy of neglect are proposed.


1993 ◽  
Vol 89 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Jeff S. Kuehny ◽  
Mary C. Halbrooks

1994 ◽  
Vol 90 (4) ◽  
pp. 739-747 ◽  
Author(s):  
Diana Lee ◽  
Barbara A. Moffatt

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