119 research outputs found
Explaining varieties of corruption in the Afghan justice sector
© 2015 Taylor & Francis. Judicial reform in Afghanistan is seriously undermined by systemic corruption that has resulted in low legitimacy of the state and weak rule of law. This article reviews the main shortcomings in the Afghan justice system with reference to 70 interviews conducted in Kabul. Building on legal pluralism and a political economic approach, the shortcomings and causes and consequences of corruption in the Afghan justice sector are highlighted. These range from low pay, resulting in bribery; criminal and political intrusion into the judiciary; non-adherence to meritocracy, with poorly educated judges and prosecutors; and low funding in the judicial sector resulting in weak case tracking and human rights abuses in the countryside. This is followed by sociological approaches: understanding corruption from a non-Western approach and emphasis on religion, morality and ethics in order to curb it
Saccade Generation by the Frontal Eye Fields in Rhesus Monkeys Is Separable from Visual Detection and Bottom-Up Attention Shift
The frontal eye fields (FEF), originally identified as an oculomotor cortex, have also been implicated in perceptual functions, such as constructing a visual saliency map and shifting visual attention. Further dissecting the area’s role in the transformation from visual input to oculomotor command has been difficult because of spatial confounding between stimuli and responses and consequently between intermediate cognitive processes, such as attention shift and saccade preparation. Here we developed two tasks in which the visual stimulus and the saccade response were dissociated in space (the extended memory-guided saccade task), and bottom-up attention shift and saccade target selection were independent (the four-alternative delayed saccade task). Reversible inactivation of the FEF in rhesus monkeys disrupted, as expected, contralateral memory-guided saccades, but visual detection was demonstrated to be intact at the same field. Moreover, saccade behavior was impaired when a bottom-up shift of attention was not a prerequisite for saccade target selection, indicating that the inactivation effect was independent of the previously reported dysfunctions in bottom-up attention control. These findings underscore the motor aspect of the area’s functions, especially in situations where saccades are generated by internal cognitive processes, including visual short-term memory and long-term associative memory
New approaches to the study of human brain networks underlying spatial attention and related processes
Cognitive processes, such as spatial attention, are thought to rely on extended networks in the human brain. Both clinical data from lesioned patients and fMRI data acquired when healthy subjects perform particular cognitive tasks typically implicate a wide expanse of potentially contributing areas, rather than just a single brain area. Conversely, evidence from more targeted interventions, such as transcranial magnetic stimulation (TMS) or invasive microstimulation of the brain, or selective study of patients with highly focal brain damage, can sometimes indicate that a single brain area may make a key contribution to a particular cognitive process. But this in turn raises questions about how such a brain area may interface with other interconnected areas within a more extended network to support cognitive processes. Here, we provide a brief overview of new approaches that seek to characterise the causal role of particular brain areas within networks of several interacting areas, by measuring the effects of manipulations for a targeted area on function in remote interconnected areas. In human participants, these approaches include concurrent TMS-fMRI and TMS-EEG, as well as combination of the focal lesion method in selected patients with fMRI and/or EEG measures of the functional impact from the lesion on interconnected intact brain areas. Such approaches shed new light on how frontal cortex and parietal cortex modulate sensory areas in the service of attention and cognition, for the normal and damaged human brain
Compartment modeling of dynamic brain PET-The impact of scatter corrections on parameter errors
Percepção viso-motora de escolares com Transtorno do Déficit de Atenção com Hiperatividade
Visuospatial Integration: Paleoanthropological and Archaeological Perspectives
The visuospatial system integrates inner and outer functional processes, organizing spatial, temporal, and social interactions between the brain, body, and environment. These processes involve sensorimotor networks like the eye–hand circuit, which is especially important to primates, given their reliance on vision and touch as primary sensory modalities and the use of the hands in social and environmental interactions. At the same time, visuospatial cognition is intimately connected with memory, self-awareness, and simulation capacity. In the present article, we review issues associated with investigating visuospatial integration in extinct human groups through the use of anatomical and behavioral data gleaned from the paleontological and archaeological records. In modern humans, paleoneurological analyses have demonstrated noticeable and unique morphological changes in the parietal cortex, a region crucial to visuospatial management. Archaeological data provides information on hand–tool interaction, the spatial behavior of past populations, and their interaction with the environment. Visuospatial integration may represent a critical bridge between extended cognition, self-awareness, and social perception. As such, visuospatial functions are relevant to the hypothesis that human evolution is characterized by changes in brain–body–environment interactions and relations, which enhance integration between internal and external cognitive components through neural plasticity and the development of a specialized embodiment capacity. We therefore advocate the investigation of visuospatial functions in past populations through the paleoneurological study of anatomical elements and archaeological analysis of visuospatial behaviors
Technology as a disruptive agent: Intergenerational perspectives
YesThis study explores how British South Asian parents perceive their children’s technology consumption through their collectivist lenses and interdependent values. The findings for this qualitative study indicate that second and third generation South Asian parents acknowledge the benefits of children’s technology use; but largely perceive technology as a disruptive agent, whereby children are becoming isolated and increasingly independent within the household. The analysis aims to understand how parents view their children’s relationship with others as a result of technology consumption. Accordingly, this paper proposes an extension of the Construal of self conceptualisation and contributes a Techno-construal matrix that establishes a dyadic connection between technology consumption and cultural values. Overall, the study reveals that children display less inter-reliance and conformance typically associated with collectivist cultures, resulting from their technology use. Consequently, parents interpret their children’s shift from interdependence to more independence as a disruptive and unsettling phenomenon within the household
Elektrody jonoselektywne ze stałym kontaktem do oznaczania niskich stężeń ołowiu, kadmu, miedzi i cynku
W niniejszej pracy przedstawiono wyniki badań dotyczące opracowania elektrod jonoselektywnych czułych na jony ołowiu, kadmu, miedzi i cynku charakteryzujących się niską granicą wykrywalności. Opracowano nowy typ elektrod ze stałym kontaktem na bazie elektrody chlorosrebrowej zawierających w polimerowej membranie nowy jonowy składnik - ciecz jonową. Wzbogacenie jonoczułej membrany cieczą jonową pozwoliło na obniżenie oporności membrany, obniżenie granicy wykrywalności i poprawę selektywności. Zastosowano ciecze z anionem chlorkowym dzięki czemu zdefiniowany został potencjał elektrody wewnętrznej Ag/AgCl, co z kolei zaowocowało poprawą stabilności i odtwarzalności potencjału uzyskanych czujników
Characteristic of a New Sensor for Indomethacin Determination
AbstractIndomethacin membrane sensors based on different plasticizers and quaternary ammonium salt tetraoctylammonium 1-(p-chlorobenzoyl)5-methoxy-2-methyl-3-indolylacetate (INDO–TOA) were prepared. The electrode (with PVC membrane plasticized with dibutylphthalate) response to indomethacin has the sensitivity near Nernstian (-59.8±1.5mV decade-1) over the linear range of 1x10-5 Ö 1x10-2mol L-1 and limit of detection 3.16x10-6mol L-1. The present electrodes show clear discrimination of indomethacin ions from several inorganic, organic and some common drug excipients. This electrode has a response time 12 s and can be used in the pH range 6.0Ö10.0. The notably property and attractive quality of the indomethacin sensor is low cost, comfortable application
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