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Natural levees are common features in river, delta and tidal landscapes. They are elevated near-channel morphological features that determine the connection between channel and floodbasin, and consequently affect long-term evolution up to delta-scales. Despite their relevance in shaping fluvial-tidal systems, research on levees is sparse and often limited to fluvial or non-tidal case studies. There is also a general lack of understanding of the role of vegetation in shaping these geomorphic units, and how levee morphology and dimensions vary in the transition from fluvial to coastal environments, where tides are increasingly important. https://www.selleckchem.com/products/e7449.html Our goal is to unravel the effects of fluvial-tidal boundary conditions, sediment supply and vegetation on levee characteristics and floodbasin evolution. These conditions were systematically explored by 60 large-scale idealized morphodynamic simulations in Delft3D which self-developed levees over the course of one century. We compared our results to a global levee dataset compution. This brings new insights for geological reconstructions as well as for the future management of deltas and estuaries under sea-level rise. © 2020 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.
This study examined how custodial grandmothers navigated the process of their grandchildren being reunified with a biological parent.
Prior research has focused on factors associated with unsuccessful reunification instead of resilient family processes that may support successful reunification. How custodial grandfamilies navigate reunification has not been examined, despite their unique relational configuration and grandparents' frequent involvement in raising their grandchildren.
Guided by Walsh's model of family resilience, semistructured, in-depth qualitative interviews were conducted with a convenience sample of 17 grandmothers whose custodial grandchildren had been reunified with a biological parent. Data analysis was guided by grounded theory methodology.
Grandmothers believed in parents fulfilling their obligations, prioritizing grandchildren's needs, and coping via their faith. Grandmothers supported reunified parents and children by providing emotional support and instrumental assistance, while maintaining clear role boundaries. Accessing resources and engaging in open family communication were helpful to the reunification, although there were still challenges in navigating family relationships.
Within custodial grandfamilies, not all reunifications were a positive outcome for the grandchildren. Grandmothers remained heavily involved in supporting and monitoring the reunifications, with the quality of the grandmother-parent relationship being paramount.
Practitioners should address family dynamics when working with custodial grandfamilies before, during, and after a reunification.
Practitioners should address family dynamics when working with custodial grandfamilies before, during, and after a reunification.
We examined how married custodial grandparents from the same household appraise the impact of caring for a grandchild on their sense of self, and how these appraisals are related to their psychological well-being.
This study is important because there is scant information on how custodial grandmothers and grandfathers both experience their caregiver role, even though 70% of these grandparents are married.
Four competing measurement and structural models from the combined perspectives of the stress process model and the two-factor model of caregivers' psychological well-being were tested with 193 married grandmothers and grandfathers.
The best fitting model was one in which two positive (personal gain and satisfaction) and two negative (loss of self and role captivity) appraisals emerged as distinct first-order constructs. Both negative appraisals correlated highest with negative affect, and both positive appraisals correlated highest with positive affect. The measurement and structural components of this model were largely invariant by grandparent gender. Mean comparisons showed that grandmothers reported significantly higher negative appraisals than grandfathers, with the latter reporting significantly greater perceived gain in the caregiving role. Bivariate correlations between grandmothers' and grandfathers' appraisals were nonsignificant for perceived gain and loss of self and of only moderate magnitude for caregiver satisfaction and role captivity.
Given that appraisals are a core component of coping with stressors, our findings have important practice implications and point to meaningful directions for future research regarding custodial grandparent families.
Given that appraisals are a core component of coping with stressors, our findings have important practice implications and point to meaningful directions for future research regarding custodial grandparent families.Convolutional neural networks were used for multiclass segmentation in thermal infrared face analysis. The principle is based on existing image-to-image translation approaches, where each pixel in an image is assigned to a class label. We show that established networks architectures can be trained for the task of multiclass face analysis in thermal infrared. Created class annotations consisted of pixel-accurate locations of different face classes. Subsequently, the trained network can segment an acquired unknown infrared face image into the defined classes. Furthermore, face classification in live image acquisition is shown, in order to be able to display the relative temperature in real-time from the learned areas. This allows a pixel-accurate temperature face analysis e.g. for infection detection like Covid-19. At the same time our approach offers the advantage of concentrating on the relevant areas of the face. Areas of the face irrelevant for the relative temperature calculation or accessories such as glasses, masks and jewelry are not considered. A custom database was created to train the network. The results were quantitatively evaluated with the intersection over union (IoU) metric. The methodology shown can be transferred to similar problems for more quantitative thermography tasks like in materials characterization or quality control in production.
Here's my website: https://www.selleckchem.com/products/e7449.html
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