Mixed reality system for industrial environment: an evaluation study

Abate, Andrea F.; Nappi, Michele; Narducci, Fabio; Ricciardi, Stefano

doi:10.1049/trit.2017.0017

Cited by 6 publications

(7 citation statements)

References 55 publications

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“…• Several AR applications offer two distinct modes: editing (to link digital information with physical objects) and exploring (to locate the POIs) [1,6]. While the editing mode requires in-situ positioning of POIs and therefore the need for pointing at any position on screen, the exploring mode, as in the two uses cases above, involves selecting POIs.…”

Section: Poi Expansion: Designmentioning

confidence: 99%

“…(2) Relative touch pointing: Fix the cursor in the physical world (Relative Pointing technique [24]), and control it with left thumb strokes on screen (Figure 5f2), namely Voronoi Jumping-Relative technique. When coupling these two techniques with the POI expansion technique, users are able to (1) select/open a POI without aligning the cursor with the POI, (2) place the cursor into the menu without additional movement, and (3) perform either a Physical or Relative pointing to select an item in the menu.…”

Section: Implemented Jumping Cursor Techniquesmentioning

confidence: 99%

“…The experimental task was designed to replicate our industrial use case: participants were asked to (1) select/open POIs located on a machine, and (2) to select an item of the opened menu for the given POIs. A 2D static target selection task, based on standard ISO 9241-9 was used for this experiment.…”

Section: Experimental Task and Environmentmentioning

confidence: 99%

“…a screen-centered crosshair technique. This contribution goes beyond previous work (1) by applying a target expansion technique for the case of handheld AR pointing and quantifying the benefits 2) by studying the next interaction step after optimizing POI pointing (i.e. selecting an item in the menu of the selected POI).…”

Section: Introductionmentioning

confidence: 99%

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Target Expansion in Context

Perea

Morand

Nigay

2020

Proceedings of the International Conference on Advanced Visual Interfaces

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Target expansion techniques facilitate pointing by enlarging the effective sizes of targets. As opposed to the numerous studies on target expansion solely focusing on optimizing pointing, we study the compound task of pointing at a Point of Interest (POI) and then interacting with the POI menu in handheld Augmented Reality (AR). A POI menu in AR has a fixed position because it contains relevant information about its location in the real world. We present two techniques that make the cursor jump to the closest opened POI menu after pointing at a POI. Our experimental results show that 1) for selecting a POI the expansion techniques are 31 % faster than the baseline screencentered crosshair pointing technique, 2) the expansion techniques with/without a jumping cursor to the closest opened POI menu offer similar performances and 3) Touch relative pointing is preferred by participants because it minimizes physical movements.

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Section: Poi Expansion: Designmentioning

confidence: 99%

Section: Implemented Jumping Cursor Techniquesmentioning

confidence: 99%

Section: Experimental Task and Environmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Target Expansion in Context

Perea

Morand

Nigay

2020

Proceedings of the International Conference on Advanced Visual Interfaces

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“…Ulery and Hyman [8] proposed a modified determination method (MDM) based on the measurement of various gas pressures, then the ideal gas law is used to calculate the desorption of gases under standard temperature and pressure conditions (STP). Mavor et al [9,10] established a process for the estimation of gas content based on the USBM direct assay. Saghafi et al [11] showed that the initial desorption of coal gas has an exponential relation with time.…”

Section: Introductionmentioning

confidence: 99%

Calculation Model and Rapid Estimation Method for Coal Seam Gas Content

Wang

Zhao

et al. 2018

Processes

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Coalbed gas content is the most important parameter for forecasting and preventing the occurrence of coal and gas outburst. However, existing methods have difficulty obtaining the coalbed gas content accurately. In this study, a numerical calculation model for the rapid estimation of coal seam gas content was established based on the characteristic values of gas desorption at specific exposure times. Combined with technical verification, a new method which avoids the calculation of gas loss for the rapid estimation of gas content in the coal seam was investigated. Study results show that the balanced adsorption gas pressure and coal gas desorption characteristic coefficient (Kt) satisfy the exponential equation, and the gas content and Kt are linear equations. The correlation coefficient of the fitting equation gradually decreases as the exposure time of the coal sample increases. Using the new method to measure and calculate the gas content of coal samples at two different working faces of the Lubanshan North mine (LBS), the deviation of the calculated coal sample gas content ranged from 0.32% to 8.84%, with an average of only 4.49%. Therefore, the new method meets the needs of field engineering technology.

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Study on the change of permeability of gas‐containing coal under many factors

Wang

et al. 2019

Energy Science & Engineering

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The permeability characteristics of gas‐containing coal under different radial stress, different axial stress, and gas pressure were studied by orthogonal experiments, using a self‐developed three‐axis servo fluid infiltration system with a gas‐solid coupling of gas‐containing coal, on the basis of a single‐factor influence on the permeability of gas‐containing coal. By considering the effective stress, three kinds of relationships between permeability and radial stress, permeability and axial stress, as well as permeability and gas pressure were established. The results show that radial stress, axial stress, and gas pressure have a great influence on the permeability characteristics of gas‐containing coal: (a) The influence of radial stress on gas permeability is significant, whereas the influence of axial stress is negligible. The degree of influence of radial stress, gas pressure, and axial stress on the permeability decreases in turn; (b) The permeability decreases following a power function with the increase of the radial stress; (c) The permeability gradually increases with the increase of axial stress. With the increase of axial stress, the permeability increases following a power function; (d) The increase in gas pressure will reduce the effective stress on the coal, and the number of pores and cracks inside the coal body will decrease. This will increase the effective seepage flow and gas flow rate of the gas and eventually lead to the increase of coal permeability. There is a quadratic function relationship between the permeability and gas pressure.

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Mixed reality system for industrial environment: an evaluation study

Cited by 6 publications

References 55 publications

Target Expansion in Context

Target Expansion in Context

Calculation Model and Rapid Estimation Method for Coal Seam Gas Content

Study on the change of permeability of gas‐containing coal under many factors

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