A FRAMEWORK FOR LOW-COST MULTI-PLATFORM VR AND AR SITE EXPERIENCES

Low-cost consumer-level immersive solutions have the potential to revolutionize education and research in many fields by providing virtual experiences of sites that are either inaccessible, too dangerous, or too expensive to visit, or by augmenting in-situ experiences using augmented and mixed reality methods. We present our approach for creating low-cost multi-platform virtual and augmented reality site experiences of real world places for education and research purposes, making extensive use of Structure-from-Motion methods as well as 360° photography and videography. We discuss several example projects, for the Mayan City of Cahal Pech, Iceland’s Thrihnukar volcano, the Santa Marta informal settlement in Rio, and for the Penn State Campus, and we propose a framework for creating and maintaining such applications by combining declarative content specification methods with a central linked-data based spatio-temporal information system.

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MIRIA: A Mixed Reality Toolkit for the In-Situ Visualization and Analysis of Spatio-Temporal Interaction Data

Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems ◽

10.1145/3411764.3445651 ◽

2021 ◽

Author(s):

Wolfgang Büschel ◽

Anke Lehmann ◽

Raimund Dachselt

Keyword(s):

Mixed Reality ◽

Interaction Data ◽

In Situ Visualization ◽

Spatio Temporal ◽

Temporal Interaction

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Integration of virtual and augmented reality into art

Almanac "Culture and Contemporaneity" ◽

10.32461/2226-0285.1.2021.238532 ◽

2021 ◽

pp. 9-16

Author(s):

Viktoriia Volynets

Keyword(s):

Augmented Reality ◽

Computer Technology ◽

Mixed Reality ◽

Cultural Experience ◽

Process Art ◽

Digital Devices ◽

Use Of Technology ◽

Virtual And Augmented Reality ◽

Spatio Temporal ◽

The Difference

The purpose of the article is to explore the transformation of artistic practices under the influence of virtual and augmented reality. The methodology is based on the application of the dialectical method, which allows to reveal the specifics of virtual / augmented / mixed realities through the prism of the dialectic of interaction between technology and man. The scientific novelty of the results is the analysis of the essence of the transformation of artistic practices under the influence of virtual and augmented reality, in particular, introduced into scientific circulation data on art projects using innovative technologies of augmented and mixed reality as a clear example of integration of the latter into art. Transboundary is considered from two points of view - the convergence of art and its reconstruction. It is stated that the implementation of projects using AR and VR technology is currently impossible without the appropriate logistics and computer technology skills. The indirectness of translation and perception of cultural experience by digital devices that determine a new technological format of personality inculturation is considered. Conclusions. These changes affect all spheres of society, erasing the spatio-temporal boundaries and involving people in an interactive creative process. Art responds most dynamically and reflects all changes in society, and modern cultural institutions are forced to take into account these trends and on this basis to form strategies for development and interaction with various stakeholders based on the use of virtual (VR), augmented (AR) reality. The difference between virtual art and other forms of art using computer technology is that its basis is not representation, but communication. Thus, numerous creative projects, implemented with the help of augmented and mixed reality, demonstrate the active use of technology in art, in the process of creating a movie, virtual exhibitions, etc.

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To Eliminate Curtain Effect of FIB TEM Samples by a Combination of Sample Dicing and Backside Milling

ISTFA 2014: Conference Proceedings from the 40th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2014p0400 ◽

2014 ◽

Author(s):

Jian-Shing Luo ◽

Hsiu Ting Lee

Keyword(s):

Sample Preparation ◽

Focused Ion Beam ◽

Preparation Method ◽

Low Cost ◽

Ion Beam ◽

Sample Preparation Method ◽

Site Specific ◽

Dual Beam ◽

Transmission Electron

Abstract Several methods are used to invert samples 180 deg in a dual beam focused ion beam (FIB) system for backside milling by a specific in-situ lift out system or stages. However, most of those methods occupied too much time on FIB systems or requires a specific in-situ lift out system. This paper provides a novel transmission electron microscopy (TEM) sample preparation method to eliminate the curtain effect completely by a combination of backside milling and sample dicing with low cost and less FIB time. The procedures of the TEM pre-thinned sample preparation method using a combination of sample dicing and backside milling are described step by step. From the analysis results, the method has applied successfully to eliminate the curtain effect of dual beam FIB TEM samples for both random and site specific addresses.

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Feasibility study of technology-enabled prevention intervention for children and families (Preprint)

10.2196/preprints.14029 ◽

2019 ◽

Author(s):

Nikki Theofanopoulou ◽

Katherine Isbister ◽

Julian Edbrooke-Childs ◽

Petr Slovák

Keyword(s):

Emotion Regulation ◽

Pilot Study ◽

Low Cost ◽

Digital Camera ◽

Well Being ◽

Structured Interview ◽

Object A ◽

Intervention Delivery ◽

Parents And Children

BACKGROUND A common challenge within psychiatry and prevention science more broadly is the lack of effective, engaging, and scale-able mechanisms to deliver psycho-social interventions for children, especially beyond in-person therapeutic or school-based contexts. Although digital technology has the potential to address these issues, existing research on technology-enabled interventions for families remains limited. OBJECTIVE The aim of this pilot study was to examine the feasibility of in-situ deployments of a low-cost, bespoke prototype, which has been designed to support children’s in-the-moment emotion regulation efforts. This prototype instantiates a novel intervention model that aims to address the existing limitations by delivering the intervention through an interactive object (a ‘smart toy’) sent home with the child, without any prior training necessary for either the child or their carer. This pilot study examined (i) engagement and acceptability of the device in the homes during 1 week deployments; and (ii) qualitative indicators of emotion regulation effects, as reported by parents and children. METHODS In this qualitative study, ten families (altogether 11 children aged 6-10 years) were recruited from three under-privileged communities in the UK. The RA visited participants in their homes to give children the ‘smart toy’ and conduct a semi-structured interview with at least one parent from each family. Children were given the prototype, a discovery book, and a simple digital camera to keep at home for 7-8 days, after which we interviewed each child and their parent about their experience. Thematic analysis guided the identification and organisation of common themes and patterns across the dataset. In addition, the prototypes automatically logged every interaction with the toy throughout the week-long deployments. RESULTS Across all 10 families, parents and children reported that the ‘smart toy’ was incorporated into children’s emotion regulation practices and engaged with naturally in moments children wanted to relax or calm down. Data suggests that children interacted with the toy throughout the duration of the deployment, found the experience enjoyable, and all requested to keep the toy longer. Child emotional connection to the toy—caring for its ‘well-being’—appears to have driven this strong engagement. Parents reported satisfaction with and acceptability of the toy. CONCLUSIONS This is the first known study investigation of the use of object-enabled intervention delivery to support emotion regulation in-situ. The strong engagement and qualitative indications of effects are promising – children were able to use the prototype without any training and incorporated it into their emotion regulation practices during daily challenges. Future work is needed to extend this indicative data with efficacy studies examining the psychological efficacy of the proposed intervention. More broadly, our findings suggest the potential of a technology-enabled shift in how prevention interventions are designed and delivered: empowering children and parents through ‘child-led, situated interventions’, where participants learn through actionable support directly within family life, as opposed to didactic in-person workshops and a subsequent skills application.

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USING LOW-COST, IN SITU MEASUREMENTS OF OPTICAL BRIGHTENERS TO IDENTIFY WASTEWATER INPUTS TO STREAMS

10.1130/abs/2020am-352046 ◽

2020 ◽

Author(s):

Carly Finegan ◽

◽

Elizabeth Hasenmueller

Keyword(s):

Low Cost ◽

In Situ Measurements ◽

Optical Brighteners

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Biomechanics of Trail Running Performance: Quantification of Spatio-Temporal Parameters by Using Low Cost Sensors in Ecological Conditions

Applied Sciences ◽

10.3390/app11052093 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2093

Author(s):

Noé Perrotin ◽

Nicolas Gardan ◽

Arnaud Lesprillier ◽

Clément Le Goff ◽

Jean-Marc Seigneur ◽

...

Keyword(s):

Heart Rate ◽

Low Cost ◽

Step Length ◽

Measurement Unit ◽

Ecological Conditions ◽

Sports Science ◽

Ground Contact Time ◽

Spatio Temporal ◽

Performance Results ◽

Trail Running

The recent popularity of trail running and the use of portable sensors capable of measuring many performance results have led to the growth of new fields in sports science experimentation. Trail running is a challenging sport; it usually involves running uphill, which is physically demanding and therefore requires adaptation to the running style. The main objectives of this study were initially to use three “low-cost” sensors. These low-cost sensors can be acquired by most sports practitioners or trainers. In the second step, measurements were taken in ecological conditions orderly to expose the runners to a real trail course. Furthermore, to combine the collected data to analyze the most efficient running techniques according to the typology of the terrain were taken, as well on the whole trail circuit of less than 10km. The three sensors used were (i) a Stryd sensor (Stryd Inc. Boulder CO, USA) based on an inertial measurement unit (IMU), 6 axes (3-axis gyroscope, 3-axis accelerometer) fixed on the top of the runner’s shoe, (ii) a Global Positioning System (GPS) watch and (iii) a heart belt. Twenty-eight trail runners (25 men, 3 women: average age 36 ± 8 years; height: 175.4 ± 7.2 cm; weight: 68.7 ± 8.7 kg) of different levels completed in a single race over a 8.5 km course with 490 m of positive elevation gain. This was performed with different types of terrain uphill (UH), downhill (DH), and road sections (R) at their competitive race pace. On these sections of the course, cadence (SF), step length (SL), ground contact time (GCT), flight time (FT), vertical oscillation (VO), leg stiffness (Kleg), and power (P) were measured with the Stryd. Heart rate, speed, ascent, and descent speed were measured by the heart rate belt and the GPS watch. This study showed that on a ≤10 km trail course the criteria for obtaining a better time on the loop, determined in the test, was consistency in the effort. In a high percentage of climbs (>30%), two running techniques stand out: (i) maintaining a high SF and a short SL and (ii) decreasing the SF but increasing the SL. In addition, it has been shown that in steep (>28%) and technical descents, the average SF of the runners was higher. This happened when their SL was shorter in lower steep and technically challenging descents.

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Converting copper sulfide to copper with surface sulfur for electrocatalytic alkyne semi-hydrogenation with water

Nature Communications ◽

10.1038/s41467-021-24059-y ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Yongmeng Wu ◽

Cuibo Liu ◽

Changhong Wang ◽

Yifu Yu ◽

Yanmei Shi ◽

...

Keyword(s):

Binding Energy ◽

Noble Metal ◽

Atomic Hydrogen ◽

Copper Sulfide ◽

Low Cost ◽

Water Electrolysis ◽

Metal Free ◽

Copper Nanowire

AbstractElectrocatalytic alkyne semi-hydrogenation to alkenes with water as the hydrogen source using a low-cost noble-metal-free catalyst is highly desirable but challenging because of their over-hydrogenation to undesired alkanes. Here, we propose that an ideal catalyst should have the appropriate binding energy with active atomic hydrogen (H*) from water electrolysis and a weaker adsorption with an alkene, thus promoting alkyne semi-hydrogenation and avoiding over-hydrogenation. So, surface sulfur-doped and -adsorbed low-coordinated copper nanowire sponges are designedly synthesized via in situ electroreduction of copper sulfide and enable electrocatalytic alkyne semi-hydrogenation with over 99% selectivity using water as the hydrogen source, outperforming a copper counterpart without surface sulfur. Sulfur anion-hydrated cation (S2−-K+(H2O)n) networks between the surface adsorbed S2− and K+ in the KOH electrolyte boost the production of active H* from water electrolysis. And the trace doping of sulfur weakens the alkene adsorption, avoiding over-hydrogenation. Our catalyst also shows wide substrate scopes, up to 99% alkenes selectivity, good reducible groups compatibility, and easily synthesized deuterated alkenes, highlighting the promising potential of this method.

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MOF-derived M-OOH with rich oxygen defects by in-situ electro-oxidation reconstitution for highly efficient oxygen evolution reaction

Journal of Materials Chemistry A ◽

10.1039/d1ta01638e ◽

2021 ◽

Author(s):

Zhikai Shi ◽

Zebin Yu ◽

Ronghua Jiang ◽

Jun Huang ◽

Yanping Hou ◽

...

Keyword(s):

Oxygen Evolution ◽

Oxygen Evolution Reaction ◽

Energy Production ◽

Low Cost ◽

Highly Efficient ◽

Oxygen Defects ◽

Electro Oxidation

The oxygen evolution reaction (OER) is an important half-reaction in the field of energy production. However, how effectively, simply, and greenly to prepare low-cost OER electrocatalysts remains a problem. Herein,...

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MixAR

Journal of Information Technology Research ◽

10.4018/jitr.2019100101 ◽

2019 ◽

Vol 12 (4) ◽

pp. 1-33 ◽

Cited By ~ 1

Author(s):

Telmo Adão ◽

Luís Pádua ◽

David Narciso ◽

Joaquim João Sousa ◽

Luís Agrellos ◽

...

Keyword(s):

Environmental Conditions ◽

Mixed Reality ◽

The Real ◽

Points Of Interest ◽

Real Scene ◽

The Future

MixAR, a full-stack system capable of providing visualization of virtual reconstructions seamlessly integrated in the real scene (e.g. upon ruins), with the possibility of being freely explored by visitors, in situ, is presented in this article. In addition to its ability to operate with several tracking approaches to be able to deal with a wide variety of environmental conditions, MixAR system also implements an extended environment feature that provides visitors with an insight on surrounding points-of-interest for visitation during mixed reality experiences (positional rough tracking). A procedural modelling tool mainstreams augmentation models production. Tests carried out with participants to ascertain comfort, satisfaction and presence/immersion based on an in-field MR experience and respective results are also presented. Ease to adapt to the experience, desire to see the system in museums and a raised curiosity and motivation contributed as positive points for evaluation. In what regards to sickness and comfort, the lowest number of complaints seems to be satisfactory. Models' illumination/re-lightning must be addressed in the future to improve the user's engagement with the experiences provided by the MixAR system.

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