There exist several accessibility evaluation tools for websites. However, no formal framework is available to evaluate the performance of assistive tools that are used by blind users to use internet. In this paper, we present a hierarchical model for quantitative evaluation of assistive tools for blinds. Identifying various performance attributes and Design metrics, we establish relationship am...

The authors investigated the metrics of spatial distance represented in situation models of narratives. In 3 experiments, a spatial gradient of accessibility in situation models was observed: The accessibility of objects contained in the situation model decreased with increasing spatial distance between the object and the reader's focus of attention. The first 2 experiments demonstrated that th...

We present a preliminary investigation of state partition and high-level dynamics for the hierarchical supervisory control of an automaton with disableable and undisableable events. Conditions are determined on partitions ensuring that state-feedback control of transitions between aggregated blocks, combined with local control, will yield target state (non-blocking) accessibility .

This paper presents fabrication and characterization of bio-nanotextured hierarchical nickel oxide (NiO) supercapacitor electrodes. The hierarchical electrode structure is created through self-assembly of Tobacco mosaic viruses (TMVs) on high aspect-ratio micropillar arrays. Enhanced assembly of the bio-nanoparticles was achieved by increasing TMV solution accessibility into the deep microcavit...

54 to the infrastructure itself. However, many studies on HSR have highlighted the importance of the provision of services (timetables, frequencies, fares, etc). A high performance infrastructure such as HST may not be so useful in terms of accessibility and reducing travel times unless adequate services are provided. Considering this service approach, the paper develops a utility indicator for...

In the past a number of I/O-efficient algorithms were designed to solve a problem on a static data set. However, many data sets like social networks or web graphs change their shape frequently. We provide experimental results of the first external-memory dynamic breadth-first search (BFS) implementation based on earlier theoretical work [13] that crucially relies on a randomized clustering. We ...

Standard Discourse Representation Theory (DRT) was designed mainly to explain the so-called donkey-sentences. The pronouns plaYing such a prominent role in all these sentences belong, however, exclusively to one (partlculaPly simple) type of pronoun. We try to extend DRT in order to cover an equally Important type of pronoun, the so-called etdes0rIptlonal,* pronoun. Discourse referents ape now ...

To achieve sustainability in the area of transport we need to view the decision-making process as a whole and consider all the most important socio-economic and environmental aspects involved. Improvements in transport infrastructures have a positive impact on regional development and significant repercussions on the economy, as well as affecting a large number of ecological processes. This art...

Hierarchical porous catalysts have recently attracted increasing interest because of the enhanced accessibility to active sites on such materials. In this context, previously reported hierarchically mesoporous ASN and ASPN materials are evaluated by applying them to the dehydration of glycerol, and demonstrate excellent catalytic performance. In addition, a comprehensive understanding of the ef...