Search results for "Diss"

Indagini teoriche e sperimentali su dissipatori ad attrito per edifici in acciaio in zona sismica

2017

The present paper presents the results of experimental analyses carried out to study the behaviour of slotted bolted connections (SBC) as friction steel dampers. The devices consist of bolted joints with slotted holes, which can be used in both steel and RC framed structures or, alternatively, into beam-column and column-foundation joints. The most suitable configurations to increase friction are investigated utilizing steel S355J0 plates and class 10.9HV high-strength bolts, under controlled pre-load and considering different types of surface treatment. Experimental tests are carried out making use of a universal testing machine, which allows mak-ing displacement-controlled tests. Once the…

Molecular phylogenetics of the Dissochaeta alliance (Melastomataceae): Redefining tribe Dissochaeteae

2021

A NEW SPECIES OF DISSOCHAETA BLUME (MELASTOMATACEAE) FROM KALIMANTAN (BORNEO, INDONESIA)

2006

Dissochaeta atrobrunnea (Melastomataceae–Dissochaeteae) from Kalimantan (Borneo, Indonesia) is described and illustrated. The species can be assigned to Dissochaeta sect. Dissochaeta and is easily recognized by its dense cover of light brown, sessile, stellate hairs and dark brown, 4–6 mm long bristles on branches, leaf undersurfaces, petioles, inflorescences, bracts and hypanthia. Like all other species of Dissochaeta sect. Dissochaeta, D. atrobrunnea shows heterantherous flowers.

A diffusion model account of normal and impaired readers.

2004

Acquired aphasics and dyslexics with even very profound word reading impairments have been shown to perform relatively well on the lexical decision task (e.g., Buchanan, Hildebrandt, & MacKinnon, 1999), but direct contrasts with unimpaired participants data is often complicated by extremely long reaction times for patient data. The dissociation between lexical decision and word naming performance shown by these patients is of theoretical importance, and here we present an analysis of processing underlying the lexical decision task. We are able to determine what aspects of performance are affected by acquired aphasics in the lexical decision task. We fit lexical decision data from aphasic pa…

Cognitive Processing dissociation by mental effort manipulation in long demanding tasks

2020

AbstractIndividuals uses cognitive resources to modulate performance in demanding tasks and a non-invasive and reliable way of measuring mental effort is pupillometry. This study aimed to test the mental effort related to different processing systems in long tasks with controlled and automatic demands. We conducted two experiments with healthy subjects: in Experiment 1 (n=15), using a metronome to ensure control on task pace, participants performed a serial number generation task (Counting; little to no effort tasks), a random number generation (RNG; effortful tasks), and no task (Unfilled interval; no effort at all). In experiment 2, (n=15) participants performed counting tasks with or wit…

The effect of explicit knowledge on sequence learning: A graded account

2004

In this paper, we study the effect of conscious knowledge on implicit sequence learning. To do so, in three sequence learning experiments, we manipulated (1) the extent to which instructions were intentional vs. incidental - intentional participants were informed of the existence of sequential regularities, and (2) the amount of explicit knowledge given to participants about the stimulus material. Results indicated that explicit knowledge improves sequence learning, as indexed by an increase in reaction times when the training sequence is unexpectedly replaced by another one. To enable us to differentiate between implicit and explicit learning, we applied the process dissociation procedure …

2019

Objective. Several studies have reported that people with Parkinson’s disease (PD) perform poorly on tests of ‘Theory of Mind’ (ToM), suggesting impairment in the ability to understand and infer other people’s thoughts and feelings. However, few studies have sought to separate the processes involved in social reasoning from those involved in managing the inhibitory demands on these tests. In this study, we investigated the contribution of inhibition to ToM performance in PD. Methods. 18 PD patients and 22 age-matched healthy controls performed a ToM test that separates the ability to infer someone else’s perspective from the ability to inhibit one’s own. Participants also completed a batter…

Avoidant coping style and verbal-cardiovascular response dissociation

1996

Abstract This study explored the relationship between an avoidant coping style and three responses during three experimental periods (i.e., speech preparation, speech delivery, and recovery). One response was cardiovascular reactivity, the two other responses were subjective in nature: self-reports of anxiety and self-estimations of blood pressure. Subjects were 20 male and 20 female students who scored either in the upper third (i.e., high-avoiders) or lower third (i.e., low-avoiders) on cognitive avoidance (Krohne, 1989). When compared to subjects scoring low on avoidance, those high on avoidance showed greater systolic blood pressure (SBP) reactivity and evidenced verbal-autonomic respon…

Letter Position Coding Across Modalities: The Case of Braille Readers

2012

BackgroundThe question of how the brain encodes letter position in written words has attracted increasing attention in recent years. A number of models have recently been proposed to accommodate the fact that transposed-letter stimuli like jugde or caniso are perceptually very close to their base words.MethodologyHere we examined how letter position coding is attained in the tactile modality via Braille reading. The idea is that Braille word recognition may provide more serial processing than the visual modality, and this may produce differences in the input coding schemes employed to encode letters in written words. To that end, we conducted a lexical decision experiment with adult Braille…

Rupture Force of Single Small Drug Molecule Binding a Split Aptamer

2012

Aptamers are specific oligonucleotides (DNA or RNA) which bind small inorganic or organic molecules, large proteins or cells. In particular, the high affinity of aptamers is expected to lead to a new class of therapeutic reagents. Thus the detection and characterization of binding strength of small molecules is important for drug and medical research. Atomic force spectroscopy (AFS) with a force resolution in the piconewton range is a valuable tool for studying interactions on a single molecular level. The detection of very small target molecules less than 500 Dalton is characterized by only a few hydrogen interactions between the aptamer and the target molecules. Thus tiny rupture forces w…