Towards a Unified and Efficient Command Selection Mechanism for Touch-Based Devices Using Soft Keyboard Hotkeys

We advocate for the usage of hotkeys on touch-based devices by capitalising on soft keyboards through four studies. First, we evaluated visual designs and recommended icons with command names for novices while letters with command names for experts. Second, we investigated the discoverability by asking crowdworkers to use our prototype, with some tasks only doable upon successfully discovering the technique. Discovery rates were high regardless of conditions that vary the familiarity and saliency of modifier keys. However, familiarity with desktop hotkeys boosted discoverability. Our third study focused on how prior knowledge of hotkeys could be leveraged and resulted in a 5% selection time improvement and identified the role of spatial memory in retention. Finally, we compared our soft keyboard layout with a grid layout similar to FastTap. The latter offered a 12–16% gain on selection speed, but at a high cost in terms of screen estate and low spatial stability.

Bringing Things Closer: Enhancing Low-Vision Interaction Experience with Office Productivity Applications

Many people with low vision rely on screen-magnifier assistive technology to interact with productivity applications such as word processors, spreadsheets, and presentation software. Despite the importance of these applications, little is known about their usability with respect to low-vision screen-magnifier users. To fill this knowledge gap, we conducted a usability study with 10 low-vision participants having different eye conditions. In this study, we observed that most usability issues were predominantly due to high spatial separation between main edit area and command ribbons on the screen, as well as the wide span grid-layout of command ribbons; these two GUI aspects did not gel with the screen-magnifier interface due to lack of instantaneous WYSIWYG (What You See Is What You Get) feedback after applying commands, given that the participants could only view a portion of the screen at any time. Informed by the study findings, we developed MagPro, an augmentation to productivity applications, which significantly improves usability by not only bringing application commands as close as possible to the user's current viewport focus, but also enabling easy and straightforward exploration of these commands using simple mouse actions. A user study with nine participants revealed that MagPro significantly reduced the time and workload to do routine command-access tasks, compared to using the state-of-the-art screen magnifier.

Simulation study on the influence of electrostatic adsorption grid on the pressure and particle concentration of flow field

Electrostatic adsorption dust removal can effectively improve the dust removal effect of inhalable particles. The grid layout in the flue gas affects the dust removal efficiency and channel pressure drop, and increases the power loss of the fan. In this paper, according to the velocity of flue gas and the concentration of particulate matter in flue gas, combined with the principle of electrostatic adsorption, a three-dimensional module including the main components of adsorption and dust removal was established. The distribution of pressure drop in the flue gas channel caused by the adsorption components with grid layout was simulated and analyzed, which provided a reference for the reasonable layout of dust adsorption components. The simulation results show that the smaller the component diameter, the smaller the pressure difference caused by the same number of components, and the smaller the longitudinal spacing of components.

SneakySnake: a fast and accurate universal genome pre-alignment filter for CPUs, GPUs and FPGAs

Motivation We introduce SneakySnake, a highly parallel and highly accurate pre-alignment filter that remarkably reduces the need for computationally costly sequence alignment. The key idea of SneakySnake is to reduce the approximate string matching (ASM) problem to the single net routing (SNR) problem in VLSI chip layout. In the SNR problem, we are interested in finding the optimal path that connects two terminals with the least routing cost on a special grid layout that contains obstacles. The SneakySnake algorithm quickly solves the SNR problem and uses the found optimal path to decide whether or not performing sequence alignment is necessary. Reducing the ASM problem into SNR also makes SneakySnake efficient to implement on CPUs, GPUs and FPGAs. Results SneakySnake significantly improves the accuracy of pre-alignment filtering by up to four orders of magnitude compared to the state-of-the-art pre-alignment filters, Shouji, GateKeeper and SHD. For short sequences, SneakySnake accelerates Edlib (state-of-the-art implementation of Myers’s bit-vector algorithm) and Parasail (state-of-the-art sequence aligner with a configurable scoring function), by up to 37.7× and 43.9× (>12× on average), respectively, with its CPU implementation, and by up to 413× and 689× (>400× on average), respectively, with FPGA and GPU acceleration. For long sequences, the CPU implementation of SneakySnake accelerates Parasail and KSW2 (sequence aligner of minimap2) by up to 979× (276.9× on average) and 91.7× (31.7× on average), respectively. As SneakySnake does not replace sequence alignment, users can still obtain all capabilities (e.g. configurable scoring functions) of the aligner of their choice, unlike existing acceleration efforts that sacrifice some aligner capabilities. Availabilityand implementation https://github.com/CMU-SAFARI/SneakySnake. Supplementary information Supplementary data are available at Bioinformatics online.

Arranging Icons on Small Displays: Do Hexagonal Layouts Improve Search Performance?

Mobile devices with small displays can use hexagonal layouts of circular icons to use space more efficiently – we test whether this design choice improves people's search performance. An experiment is reported in which 24 participants performed known-item searches of menus that varied along four dimensions: (1) whether icons were arranged using a hexagonal or a grid layout, (2) how closely icons were placed next to each other, (3) the number of icons in the display that shared the same color as the target, and (4) whether icons stayed in the same location or moved between trials. Results show that search times were faster with hexagonal layouts but only when there were many same-color distractors and icons were packed very close to each other. This work contributes new empirical findings on how icon arrangements, in interaction with other critical visual design features, affect search performance.

The Dilemma of Saudi Arabian Homes in Riyadh

The courtyard form of the traditional Arab house responded to both climate and the culture of its inhabitants. Islamic values, as well as socioeconomic factors, played crucial roles in the design. However, the mid-20th century marked the beginning of Saudi Arabia’s first rapid economic growth as a result of the discovery of oil; which dramatically increased the wealth and prosperity of the population, and resulted in new lifestyles. This period witnessed the introduction of the grid layout street pattern and the detached villa house. This type became the prevalent style in Saudi Arabia, the central province, and Riyadh in particular. While the traditional courtyard house more than satisfied cultural needs, increasingly it was viewed inappropriate for affluent 21st-century lifestyles. Yet this research confirmed that the villa style is creating fundamental problems for Saudi families. The theoretical framework is set in sustainability theory, and investigates the principles of home through human needs, place, and house. The methodology uses a survey strategy with questionnaires, interviews, and building analysis to determine which aspects of home are satisfied by each type. The dilemma is that Saudi families will not return to the courtyard type because it does not meet important requirements of status; whereas the villa type does not meet significant criteria such as privacy. The context is increasing climatic temperatures, which are making both types increasingly uncomfortable. This study highlights the need for a specific contemporary home style that would satisfy 21st-century aspirations, respect Islamic culture, and respond to changing climate.

Democratic Street: An application of Space Syntax in testing the spatial justice among women pedestrian

This research examines the quality of streets and public life among women through observation. Axial analysis models are combined into Space Syntax to hypothesize the effect of grid layout on street vitality and sociability in shopping streets by using global and local integration to measure how women use the space. The result indicated that there is a correlation among these parameters with the following spatial configurative analyses; integrated streets attract more women pedestrians and how women feel as well as they use street space.Keywords: Democratic Street; Spatial Justice; Women; Space SyntaxeISSN: 2398-4287 © 2020. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia.DOI: https://doi.org/10.21834/e-bpj.v5i13.1967