Simulated Environment Research Articles

What drives the tourist Daka? An empirical study based on the perspective of dual motivation

ABSTRACT Tourist Daka, a recording behaviour displaying individuals’ tourism in virtual spaces, has become a major manifestation of travel experiences in modern social media. Through a dual motivation lens, this study investigated the relationship between Daka destination features, dual Daka motivations (i.e. intrinsic motivation, extrinsic motivation), and Daka intention to develop a model that outlines the influencing mechanism driving the occurrence of tourist Daka. The results demonstrated that: (1) Daka destination features evoke different Daka motivations; (2) intrinsic motivation triggers an individual’s emotions on Daka destination and affects their Daka intention, while extrinsic motivation only evokes their emotions on Daka destination; and further (3) individual’s tourism involvement plays a moderating role in the influencing path. This study provides theoretical data regarding studies of tourist behaviour and practical guidance for the development of novel tourism models.

Effects of a visual search task in a virtual reality space with a moving background on spatial cognition and standing balance in patients with left hemiparetic stroke

ABSTRACT We examined effects of a visual search task (VST) in virtual reality (VR) with a moving background on spatial cognition and standing balance in left hemiparetic strokes. The VST with background deviation was allocated to Case A. In Case B, the VST without the deviation was performed. As a results, in Case A, the reaction time of VST was shortened in the paretic space and ability of weight-shift to the paretic side was improved. In conclusion, the VST in the VR with a spatial manipulation may improve spatial cognition and standing balance in left hemiparetic strokes.

Face-to-face and virtual mathematics enrichment for rural schools:

In this paper the authors report on the University of Southern Queensland’s (USQ) Mathematics Rural and Regional Communities (MRRC) project. This project is an extension to the Mathematics Enrichment Program (MEP), which has been running since 2007. Since the MEP’s inception, more than 500 students, 29 schools, 15 pre-service teachers (who are involved to gain practical teaching experience) and many volunteer university lecturers and other mathematics and education professionals have been involved. The MRRC project builds on USQ’s MEP to offer content in an online or virtual format. Through an interactive virtual environment, the MRRC project connects regional high schools to USQ’s two campuses to build the capacity of the teachers and students involved. The authors describe the overall aim and structure of the MRRC program, preliminary evaluations of the program, analysis of the virtual space and future plans for the program.

Developing virtual collaborative health team educational environments

In this short paper we introduce a conceptual framework that is under development to create virtual educational environments to simulate collaborative health team experiences. Building on our work of developing virtual environments for authentic Paramedicine education scenarios, we are extending the concept across the seven health disciplines at the university, beginning initially with a prototype involving three health discipline teams: Paramedicine, Nursing, and Physiotherapy. Using a design based research methodology we are developing prototypes of immersive simulated environments to simulate the real - world interaction between these three health teams for our students. We leverage a low cost mobile BYOD approach enabling rapid prototyping and development of these scenarios.

VibHead: An Authentication Scheme for Smart Headsets through Vibration

Recent years have witnessed the fast penetration of Virtual Reality (VR) and Augmented Reality (AR) systems into our daily life, the security and privacy issues of the VR/AR applications have been attracting considerable attention. Most VR/AR systems adopt head-mounted devices (i.e., smart headsets) to interact with users and the devices usually store the users’ private data. Hence, authentication schemes are desired for the head-mounted devices. Traditional knowledge-based authentication schemes for general personal devices have been proved vulnerable to shoulder-surfing attacks, especially considering the headsets may block the sight of the users. Although the robustness of the knowledge-based authentication can be improved by designing complicated secret codes in virtual space, this approach induces a compromise of usability. Another choice is to leverage the users’ biometrics; however, it either relies on highly advanced equipments which may not always be available in commercial headsets or introduce heavy cognitive load to users. In this paper, we propose a vibration-based authentication scheme, VibHead, for smart headsets. Since the propagation of vibration signals through human heads presents unique patterns for different individuals, VibHead employs a CNN-based model to classify registered legitimate users based the features extracted from the vibration signals. We also design a two-step authentication scheme where the above user classifiers are utilized to distinguish the legitimate user from illegitimate ones. We implement VibHead on a Microsoft HoloLens equipped with a linear motor and an IMU sensor which are commonly used in off-the-shelf personal smart devices. According to the results of our extensive experiments, with short vibration signals (≤ 1s ), VibHead has an outstanding authentication accuracy; both FAR and FRR are around 5%.

End-effector with winding and scooping functions for folding and transporting various cloth parts after cutting

AbstractIn this study, we propose a novel end-effector that combines the characteristics of winding and scooping fabrics to grasp and categorically place various cloth parts cut by a cutting machine. In addition, we introduce a method for folding the fabric front and back into smaller dimensions, thereby reducing the space required for categorizing, placing, and packaging various clothes, which, to the best of our knowledge, is unique. Subsequently, we develop a method that autonomously determines folding strategies based on the different dimensions of cloth parts, allowing targeted processing of various cloth parts. This approach reduces the height demands of the robot and improves its capability to simultaneously handle multiple types of clothes. Finally, we evaluate the proposed end-effector and folding method in a simulated factory environment using T-shirt parts made of different materials.

Screening of Lactic Acid Bacteria Strains for Potential Sourdough and Bread Applications: Enzyme Expression and Exopolysaccharide Production.

Twenty-eight strains of lactic acid bacteria (LAB) were characterized for the ability to express enzymes of interest (including protease, xylanase, α-amylase, laccase, and glucose oxidase) as well as the ability to produce exopolysaccharide (EPS). The screening of enzyme capability for all LAB strains proceeded in a progressive 3-stage manner that helps to profile the efficiency of LAB strains in expressing chosen enzymes (Stage 1), highlights the strains with affinity for flour as the substrate (Stage 2), and discerns strains that can adapt well in a simulated starter environment (Stage 3). The theoretical ability of LAB to express these enzymes was also assessed using Basic Local Alignment Search Tool (BLAST) analysis to identify the underlying genes in the whole genome sequence. By consolidating both experimental data and information obtained from BLAST, three LAB strains were deemed optimal in expressing enzymes, namely, Lb. delbrueckii subsp. bulgaricus (RBL 52), Lb. rhamnosus (RBL 102), and Lb. plantarum (ATCC 10241). Meanwhile, EPS-producing capabilities were observed for 10 out of 28 LAB strains, among which, Lactococcus lactis subsp. diacetylactis (RBL 37) had the highest total EPS yield (274.15mg polysaccharide/L culture) and produced 46.2% polysaccharide with a molecular mass of more than 100kDa.

Interviewing in the metaverse: The renewed importance of location and embodiment

In this paper, we explore the methodological implications of conducting online qualitative interviews in the metaverse through virtual reality (VR). Technology companies have invested heavily in creating metaverse platforms for bringing people together in digital worlds, yet there is a significant absence of geographical research examining the implications of these spaces. Twenty-six undergraduate students participated in a remote interviewing exercise using the platform AltSpaceVR. Face-to-face interviews were subsequently conducted to gather their reflections about the experience of research interviews in a metaverse. The study highlights the significance of immersion and presence in virtual environments. Participants noted that, in contrast to video interviewing, the immersive nature of the virtual space resembled conventional face-to-face interviews. A sense of immersion and presence enhances the authenticity of the interview experience. There were, however, challenges in interface management and the role of avatars altering the embodied connection with the research subjects. The avatars provided personal representation but introduce complexities in establishing genuine connections and rapport. In our discussion of the implications for VR qualitative research, we emphasise the interplay of immersion, presence and embodiment which can add real value to remote interviewing experience, while reflecting on the technical and physiological limitations.

Rhetorical Strategies and Appraisal Markers in Online Civic Engagement of the Yoruba Nation Secessionist Agitation on Nairaland

This study examines rhetorical strategies and appraisal markers in the engagement of the Yoruba Nation (YN) secessionist agitation in Nairaland. Adopting the appraisal framework and Fairclough’s notions of intertextuality and interdiscursivity as a theoretical anchorage, analysis unveils historical and biblical allusion, proverbs and adages, rhetorical questions, code alternation and pidgin as prominent rhetorical practices and intertextual and interdiscursive resources that index cognitive positioning and ideological evaluations of the agitation and related social actors. While the anti-YN participants express negativity and ideological dissociation from the secessionist course, the pro-YN participants express positivity, solidarity and ideological alignment with the separatist agitation. As the secessionist movement generates concerns about ethnic synergy and national integration, participants take advantage of a heterogeneous virtual space to influence other online participants’ ideological positions on whether to sustain patriotic spirit to strive continually towards Nigeria’s nationhood or to join the vociferous call for the nation’s geo-ethnic dismemberment and ultimately secession.

AI-Driven Dim-Light Adaptive Camera (DimCam) for Lunar Robots

Abstract. The past decade has been a boom in lunar exploration. China, India, Japan and other countries have successfully landed landers or rovers on the lunar surface (Wu et al., 2014, 2018, 2020; Prasad et al., 2023). Future missions to explore the Moon are focusing on the lunar south pole (Peña-Asensio et al., 2024). The solar altitude angle at the lunar south pole is extremely low, resulting in low solar irradiance and large areas often in dim light or shadows. The permanently shadowed regions (PSRs) at the lunar south pole are also likely containing substantial amounts of water ice (Li et al., 2018). Future lunar robots exploring the lunar south pole will need to operate in low light or shadowed regions, making camera sensors sensitive to the dim-light environments necessary for these robots. Common night vision sensors usually use near-infrared cameras. However, sensors based on passive infrared technology have image resolution limited by several factors, including the intensity of infrared radiation emitted by the object, the sensitivity of the camera, and the performance of the optical system. For instance, thermal imagers typically have a resolution of 388*284 pixels only. We have developed a dim-light adaptive camera (DimCam) that is ultra-sensitive to the varying illumination conditions driven by AI to achieve high-definition imaging of 1080P or above, for future lunar robots operating in shadows or dim-light regions. The DimCam integrates two starlight-level ultra-sensitive imaging sensors connected by a rigid base to provide stereo vision in low illumination environment. An AI edge computing unit is embedded inside the DimCam to adaptively denoise and enhance image quality. The AI module uses an end-to-end image denoising network to identify and remove noises in the images more accurately by utilizing depth information from the stereo sensors. Compared with traditional monocular denoising algorithms, the denoising network based on stereo vision can significantly improve denoising effects and efficiency by enhancing the signal-to-noise ratio of the data input in the front end. The superposition of overlapping scenes can be regarded as a delayed exposure. Concurrently, the residual analysis of the aligned images aids in noise identification. In addition, for pixels obscured by noise, more accurate pixel values can be restored through interpolation or replacement using depth information obtained from the stereo sensors. Subsequently, a pre-trained lightweight deep network modified from Zero-DCE (Guo et al., 2020) is used for image quality enhancement in terms of brightness and contrast, providing high-quality images even in low-light environments for subsequent applications, such as positioning and navigation of robots, 3D mapping of the surrounding environment, and autonomous driven. We have tested the DimCam in a simulated environment in the laboratory, and the results show that the DimCam has promising performances and great potential for various applications.

ROS-responsive carboxymethyl chitosan nanoparticles loaded with astaxanthin for alleviating oxidative damage in intestinal cells

The controlled release of antioxidant substances at the intestinal oxidative damage site is crucial for alleviating intestine-related diseases. Herein, the novel ROS-responsive carrier was synthesized through simple amidation reaction between carboxymethyl chitosan (CMC) and methionine (Met), a natural organic compound containing ROS-responsive linkages (thioether). Initially, astaxanthin (AXT) nanoparticles (AXT2@CMT) with excellent stability and drug loading capacity (39.68 ± 0.23 μg/mL) were prepared by optimizing various reaction conditions. In the simulated high-concentration ROS environment of the intestine, CMT achieved a transition from hydrophobic groups (thioether) into hydrophilic groups (sulfone), which was conducive to the controlled release of AXT. In vitro cell experiments revealed that AXT2@CMT could effectively alleviate the oxidative damage in intestinal epithelioid cell line No. 6 (IEC-6 cell) caused by H2O2. This study achieved a straightforward preparation of ROS-responsive nanocarrier through food ingredients, offering a theoretical foundation for the controlled release of AXT at the intestinal oxidative damage site.

Power Hardware-in-the-Loop Smart Inverter Testing with Distributed Energy Resource Management Systems

The increasing integration of grid-connected photovoltaic (PV) inverters and inverter-based resource (IBR) systems into the power grid emphasizes the critical need for standardized procedures to ensure their reliability and effective grid support functions. This research is driven by the gap in standardized testing methodologies for smart inverters, which are pivotal for the stability and quality of power in distributed energy systems. We used a Power Hardware-in-the-Loop (PHIL) laboratory setup to conduct a comprehensive analysis of smart inverters within a simulated real-world grid environment. Our approach integrates a Distributed Energy Resource Management System (DERMS) with PHIL testing to evaluate the smart inverter’s performance across various operational modes. The detailed test protocols mimic real-world grid conditions, enabling the examination of the inverter’s dynamic response to grid disturbances, control strategies, and communication protocols. The primary aim of this study is to rigorously test and validate the primary functions of smart inverters, focusing on their impact on overall grid stability and power quality management. This includes advanced features like Volt–VAR, Volt–Watt, dynamic power factor control, and the seamless integration of smart inverters into DERMSs and Advanced Distribution Management Systems (ADMSs). Furthermore, we aim to bridge the current gap in standardized testing procedures, contributing to the establishment of robust standards and operating protocols for smart inverter integration into the grid.

A TRACER STUDY ON BACHELOR OF SCIENCE IN BUSINESS ADMINISTRATION - FINANCIAL MANAGEMENT GRADUATES FROM ACADEMIC YEAR 2019 TO 2023

This study aimed to assess the employment rates and employability status of graduates from the Bachelor of Science in Business Administration-Financial Management program at Kapalong College of Agriculture, Sciences, and Technology from 2019 to 2023. It also examined graduates attitudes towards work, the quality of education provided by the institution, and their skills development. Using a descriptive research method, a total of 587 respondents participated in an online survey conducted through Google Forms. Findings revealed that 88.17% of financial management graduates were employed, with 52.07% working in job-related professions such as credit & collection assistant, entrepreneur, cashier, auditor, bookkeeper, inventory personnel, accounting staff, and account officer. Additionally, 30.77% were employed in non-related fields including office-based clerk, government employee, sales agent/specialist/representative, call center agent, marketing specialist, technical staff, and photographer. Among the employed graduates, 37% held regular positions, 33% were on job order, 16% worked on a contractual basis, 8% were casual employees, and 6% were self-employed. Furthermore, only 0.85% pursued a Master in Business Administration, while 4.26% became teacher education unit earners. The study found that graduates consistently exhibited very high levels of attitude towards work, quality education provisions, and skills development. However, computer and ICT skills received the lowest mean score, suggesting a need for the program to offer practical training sessions, workshops, or laboratory sessions to enhance students proficiency in these areas. Providing opportunities for students to practice using computer software and applications in simulated business environments or real-world projects is recommended.

Brief report: private pleasures and the damage done: asking the unasked question about consumption of online pornography

The domestication of the Internet has invigorated debate about the harms of pornography. The difference between pre-Internet and online pornography is not in any straightforward sense only one of degree. Compared to pre-Internet pornography, speed, and ease of access to an extensive range of pornographic content, along with the consumption of pornography in a virtual context, have introduced new prudential risks. In this Brief Report I restrict my focus to the impact on sexual health and on personal relationships and summarise the relevant research. Drawing on a psychoanalytically informed conceptual framework, I argue that the online medium changes, in prudentially significant ways, the consumer’s relationship to the sexual materials by providing a virtual space within which sexual desire is gratified quickly and non-reflectively, undermining the consumer’s capacity a) to mentalise their sexual desire and that of the other and b) to evaluate the prudential risks associated with the consumption of online pornography. The risks are especially significant for the digital generation whose sexual development is now more likely to be shaped by online pornography. I conclude by outlining one key practice implication arising from the research.

Utilization of Learning Space as a Learning Resource Center

A conducive learning situation is related to the quality of student learning. The creation of a conducive class will prevent students from feeling bored, physical fatigue and also the creation of a conducive class will provide motivation and comfort for students' learning. Learning space is the place where the teaching and learning process takes place, the place in question can be indoors, outdoors, or virtual space. Learning space is a facility that creates a learning atmosphere and supports the creation of an innovative learning ecosystem. There are four ideas that form the basis for developing future learning spaces, namely: learning by doing, context-based, interaction, and learning locations. To realize this design, a space-technology-cognitive concept was designed that combines aspects of knowledge, aspects of space or the learning environment and the use of technology as one of the smart learning designs in the future. Utilization of learning space as a learning resource center can be carried out by referring to five functions, namely: the function of developing instructional systems; learning media service function; learning media development function; training function and administrative function.

At the Heart of the Mothercrystal: Final Fantasy XIV’s Approach to Localization and Lore as a Virtual Contact Zone

<p>Virtual worlds by nature of their persistence and ability to have multiple simultaneous users in the same space can act as contact zones, defined by Mary Louse Pratt as a "social space where disparate cultures meet, clash, and grapple with each other, often in highly asymmetrical relations of domination and subordination," (1991, p. 34). One affordance of virtual worlds in constructing the contact zone is the ability for the developer to use localization to bridge language gaps between a user and the virtual world and, to some extent, between players who have a shared understanding of the virtual world. This understanding extends to the properties of objects and locations and any narrative lore or background in the world. However, localization can be a double-edged sword, with choices in translation and localization leading to confusion among virtual world users and conflict between users and developers. </p><p>Language impacts two aspects of the virtual contact zone. For one, players communicate using languages they are proficient in, using whatever affordances are available in the interface and paratextual platforms, such as the official forums and social mediaplatforms like Reddit and Tumblr. For another, the world itself is awash in language. That text manifests itself in gameplay elements from user abilities and item names to more narrative elements such as character names, dialogue, and written story and worldbuilding elements. These textual and narrative components, called "lore," are essential in contextualizing virtual spaces. Lore helps build the virtual world beyond the actual mechanics and interactions within a virtual space. Lore gives users a sense of not just place but of geography, not just time, but of history, and not just context for players but their place within the story of the virtual world. Lore offers players motivation for playing in addition to traditional gameplay motivators such as exploration, achieving, socializing, and defeating enemies or other players (Yee, 2006; Bartle, 1996) to interact with the world. </p><p>This paper focuses on the case of Final Fantasy XIV: A Realm Reborn (FFXIV), an MMORPG initially released in 2013, its production, approaches to localization,and how it contributes to building a "virtual contact zone." In looking at specific instances where controversies in translation and localization led to confusion and conflict among the participants and developers of the game, this case study illustrates the role of localization in games beyond translation and acculturation. Localization not only serves as the linguistic bridge among members of the contact zone but, in the case of online games where world-building and narrative are important aspects for immersion and play, creates shared experiences and understandings of that virtual world among all members of the virtual contact zone.</p>

Corrosion Behavior of Al2O3-40TiO2 Coating Deposited on 20MnNiMo Steel via Atmospheric Plasma Spraying in Hydrogen Sulfide Seawater Stress Environments

In this study, an Al2O3-40TiO2 coating was deposited on 20MnNiMo steel via atmospheric plasma spraying. The corrosion behavior of the coating was investigated in both artificial seawater and a simulated environment with hydrogen sulfide and high pressure. Additionally, ion dissolution experiments were conducted to evaluate the coating’s bio-friendliness. In artificial seawater, the corrosion rate (based on the corrosion current) of the Al2O3-40TiO2 coating initially decreased before increasing. It was speculated that the blocking of corrosion products in the defect channels was helpful in delaying the progress of corrosion in the early stage. The coating had a corrosion current on the order of 10−6 A/cm2 in artificial seawater, suggesting good protection in conventional seawater environments. In the simulated environment, the corrosion rate (based on the weight loss) of the Al2O3-40TiO2 coating showed a continuously declining trend. It was deduced that, unlike corrosion products in artificial seawater, the corrosion products in the simulated environment (e.g., metal sulfide) might be more chemically stable, leading to a longer blocking effect. Therefore, a minimal corrosion rate of 0.0030 mm/a was obtained after the coating was immersed for 30 days. The amount of dissolved coated elements was negligible and there were only small amounts of dissolved non-coated elements such as Ni and Mo. The developed coating can be considered to be highly biofriendly if the non-coated area of the specimen is well sealed.

Is elderspeak communication in simulated hospital dementia care congruent to communication in actual patient care? A mixed-methods pilot study.

Simulation offers a feasible modality to prepare nurses for challenges communicating with patients with dementia. Elderspeak communication is speech that sounds like baby talk and can lead to rejection of care by patients with dementia. However, it is unknown if simulation can be used to capture elderspeak communication in dementia care. The purpose of this mixed-methods study was to determine if simulation accurately captures elderspeak communication by nursing staff in hospital dementia care. A 3-part mixed-methods design in which (1) three dementia care simulations were designed and validated by a panel of experts, (2) communication by nursing staff completing each simulation was quantitatively compared to communication during actual patient care, and (3) views on the realism were explored using within- and across-case coding. Three simulations using different modalities (manikin, role-play, and standardised patient) were designed and validated with eight experts using the Lynn Method. Ten nursing staff were audio-recorded and their communication was coded for elderspeak communication. Results for each simulation were compared using Wilcoxon signed-rank test to recordings taken during actual dementia care encounters. Debriefings were coded for realism and results were converged. The average time using elderspeak during naturalistic care was 29.9% (SD = 20.9%) which did not differ from the average amount of elderspeak used across the three simulations modalities which ranged from 29.1% to 30.4%. Qualitative results suggested a lack of realism with the manikin condition and the nursing staff indicated preference for the simulation with the standardised patient. Communication elicited in the dementia care simulations was congruent to communication produced in actual dementia care but preference was for the standardised patient. Elderspeak communication can be accurately produced in the simulated environment which indicates that simulation is a valid method for person-centred communication training in nursing staff. Simulation offers a feasible modality to prepare nurses for challenges communicating with patients with dementia. Elderspeak communication is speech that sounds like baby talk and can lead to rejection of care by patients with dementia. However, it is unknown if simulation can be used to capture elderspeak communication in dementia care. Elderspeak communication captured in the simulated environment was congruent to communication nursing staff use during actual patient care to hospitalised persons living with dementia. This study empirically identifies that communication is elicited in similar patterns by nursing staff in the simulated environment compared to the naturalistic care environment which demonstrates that simulation can be used as a valid tool for education and research on person-centred communication. STROBE. No Patient or Public Contribution.

Preparation of large-area superhydrophobic and anti-icing 3D micro-nano-structures using femtosecond Bessel beams with fluorination treatment

This study proposes a simple strategy for overcoming the adverse effects of icing on material surfaces and improving the anti-icing performance of these surfaces. First, a femtosecond Gaussian beam is transformed into a femtosecond Bessel beam through spatial shaping to improve its energy distribution in the propagation direction while avoiding the adverse effects of defocusing during processing, thereby achieving large-area, consistent micro-nano-fabrication. Subsequently, the surface wettability of the considered material is controlled through the preparation of a functionalized three-dimensional micro-nano-structure using fluorination, transforming the material surface from superhydrophilic to superhydrophobic, thereby directly preventing the adhesion of subcooled droplets. Static-droplet condensation tests and dynamic anti-icing tests in simulated freezing-rain environments demonstrated that the proposed strategy can considerably increase the droplet condensation time and reduce the amount of surface icing. Overall, the strategy provides an efficient, high-quality, highly reproducible solution to the problem of surface icing.

Open source robot localization for nonplanar environments

AbstractThe operational environments in which a mobile robot executes its missions often exhibit nonflat terrain characteristics, encompassing outdoor and indoor settings featuring ramps and slopes. In such scenarios, the conventional methodologies employed for localization encounter novel challenges and limitations. This study delineates a localization framework incorporating ground elevation and incline considerations, deviating from traditional two‐dimensional localization paradigms that may falter in such contexts. In our proposed approach, the map encompasses elevation and spatial occupancy information, employing Gridmaps and Octomaps. At the same time, the perception model is designed to accommodate the robot's inclined orientation and the potential presence of ground as an obstacle, besides usual structural and dynamic obstacles. We provide an implementation of our approach fully working with Nav2, ready to replace the baseline Adaptative Monte Carlo Localization (AMCL) approach when the robot is in nonplanar environments. Our methodology was rigorously tested in both simulated environments and through practical application on actual robots, including the Tiago and Summit XL models, across various settings ranging from indoor and outdoor to flat and uneven terrains. Demonstrating exceptional precision, our approach yielded error margins below 10 cm and 0.05 radians in indoor settings and less than 1.0 m in extensive outdoor routes. While our results exhibit a slight improvement over AMCL in indoor environments, the enhancement in performance is significantly more pronounced when compared to three‐dimensional simultaneous localization and mapping algorithms. This underscores the considerable robustness and efficiency of our approach, positioning it as an effective strategy for mobile robots tasked with navigating expansive and intricate indoor/outdoor environments.