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Several studies showed that shifting of visuospatial attention modulates sensory processing at multiple levels of the visual pathways and beyond, including the occipital striate cortices level. However, inconsistent findings have been reported thus leaving these issues still disputed. 21 participants took part to the present study (the EEG signals of 4 of them were discarded due to artifacts). We used ERPs and their neural sources to investigate whether shifting spatial attention in space across the horizontal meridian of the visual field affected striate cortices activation at the earliest latency. Time-series of scalp topographical maps indicated that, unlike ERPs to attentional-neutral central cues, ERPs to attention-directing local cues showed earliest polarity inversions as a function of stimulated field and processing latency range considered, at occipital-parietal electrodes. In between 60-75 ms, attentional shifting cues elicited a positivity for both visual fields, whereas at a later latency (75-90 ms) they elicited a positivity and a negativity for the upper and lower visual hemifields, respectively. Computed neural sources included striate, besides extrastriate, cortices for both visual hemifields and latency ranges. Conjointly, behavioral responses to targets were faster when they were preceded by local than by neutral cues, and when presented in the upper than the lower hemifield. Our findings support the hypothesis that attention shifts may affect early sensory processing in visual cortices.
While parenting a child with special needs is burdensome, some parents do overcome through protective resources. selleck inhibitor Social support has been widely linked to this unique ability to overcome the challenges of raising a child with special needs. In spite of this, there is still paucity of research about the influence of the sources of perceived social support on this ability, known as resilience.
This study examined three sources of perceived social support-family, friends and significant other-on the resilience of Ghanaian parents raising children with special needs while adjusting for covariates (parental gender, marital status and educational level).
One hundred and seven (107) biological parents were recruited from special schools and parents support groups in Accra, Ghana. They completed paper-and-pencil or online questionnaires on resilience and perceived social support.
Output from hierarchical multiple regression after adjusting for covariates showed that only support from significant others predicted resilience. Additionally, being married was positively and holding a higher education was inversely associated with resilience.
These findings indicate the importance of support from significant others in the resiliency of parents but underscore the need to fully integrate and emphasize support from the other sources in resilience enhancing interventions.
These findings indicate the importance of support from significant others in the resiliency of parents but underscore the need to fully integrate and emphasize support from the other sources in resilience enhancing interventions.This paper employed the autoregressive distributed lag (ARDL) methodology to examine the effect of electricity transmission and distribution losses (ETL) on the economic growth of South Africa over the period 1971-2014. After controlling for foreign direct investment (FDI) and financial development, the results of the study show long-run negative relationship between ETL and economic growth. For robustness checks, we account for non-linearities/asymmetries in our model and find that a percentage increase in ETL decreases economic growth from 3.786% to 2.245%. The correction of the distortions of the convergence to long-run equilibrium by temporary shocks is reduced from 30.4% to 25.1%. Additionally, financial development and gross fixed capital formation promote growth while FDI and trade have insignificant effect.In this paper, we establish some fixed point results of a mapping satisfying certain rational type contractive conditions in the frame work of a metric space endowed with partial order. Our results generalize and extend the result of Singh and Chatterjee (1988) [7] in partially ordered metric spaces and some existing results in the literature. Few illustrative examples are given to support our results.A graph G is called super edge-magic if there exists a bijection f V ( G ) ∪ E ( G ) ⟶ E ( G ) , where f ( V ( G ) ) = V ( G ) , such that f ( u ) + f ( u v ) + f ( v ) is a constant for every edge u v ∈ E ( G ) . Such a case, f is called a super edge magic labeling of G. A bipartite graph G with partite sets A and B is called consecutively super edge-magic if there exists a super edge-magic labeling f with the property that f ( A ) = 1 , 2 , ⋯ , and f ( B ) = A . The super edge-magic deficiency of a graph G, denoted by μ s ( G ) , is either the minimum nonnegative integer n such that G ∪ n K 1 is super edge-magic or +∞ if there exists no such n. The consecutively super edge-magic deficiency of a bipartite graph G, denoted by μ c ( G ) , is either the minimum nonnegative integer n such that G ∪ n K 1 is consecutively super edge-magic or +∞ if there exists no such n. In this paper, we study the super edge-magic deficiency of some graphs. We investigate the (consecutively) super edge-magic deficiency of forests with two components. We also investigate the super edge-magic deficiency of a 2-regular graph 2 C 3 ∪ C n and join product of K 1 , n ∪ P m with an isolated vertex.Effective inhibition of metallic corrosion to prevent its consequent loss is one of the serious apprehensions for industries in the modern world. This paper analyses the application of poly(2-ethyl-2-oxazoline) (PEOX) as an effective inhibitor of corrosion, when it is made to be in contact with the surfaces of mild steel (MS). The sustainability of MS against corrosion in 0.1 M Hydrochloric acid solution in the presence of known concentration of PEOX is assessed by potentiodynamic polarization (PDP) measurements, linear polarization studies (LPR), and electrochemical impedance spectroscopy (EIS). It was observed that PEOX behaves as better inhibitor for mild steel corrosion in 0.1 M HCl solution and it show enhanced inhibition efficiency (IE%) 79% at a concentration of 50 ppm. The polarization experiments indicated that addition of PEOX in concentrations varies from 25 ppm to 50 ppm induces a decrease of both cathodic and anodic currents densities. Also, the micrographs recorded by the Scanning Electron Microscopy confirm that molecules of PEOX act as corrosion inhibitors for the surfaces of MS in 0.
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