Search Results (39)

A novel dual-band multi-linear polarization reconfigurable (MLPR) antenna for body-centric wireless communication systems (BWCS) is presented in this paper. The design comprises five symmetrically arranged multi-branch radiating units, each integrating an elliptical patch and curved spring branch for the Medical Implant Communication Service (MICS) band (403–405 MHz), and a pair of orthogonal strip patches for the Industrial, Scientific and Medical (ISM) $2.45$ GHz band (2.40–2.48 GHz). By selectively biasing PIN diodes between each unit and a central pentagonal feed, five distinct LP states with polarization directions of $0^{\circ }$, ${72}^{\circ }$, ${144}^{\circ }$, ${216}^{\circ }$, and ${288}^{\circ }$ are achieved. A dual-line isolation structure is introduced to suppress mutual coupling between radiating units, ensuring cross-polarization levels (XPLs) better than $-15.0$ dB across the operation bands. Prototypes fabricated on a $160\times 160\times 1.5$ mm³ substrate demonstrate measured $|S_{11}|<-10$ dB across 401–409 MHz and 2.34–2.53 GHz and stable omnidirectional patterns despite biasing circuitry perturbations. The compact form and robust dual-band, multi-polarization performance make the proposed antenna a promising candidate for implantable device wake-up signals and on-body data links in dense indoor environments. Full article

This paper details how, in partnership with young people, community workshops centred on queer joy can offer queer and trans youth sexuality education (SE) that is relevant to their experiences, lived realities, and desires. In the data, young people discuss how tailored content, queer pedagogies, youth-centric approaches, and affirming spaces that are responsive to their questions might improve their sexuality knowledge as well as their mental health. A total of 22 youth participants from a mid-size Canadian city, the vast majority of whom identified as queer and/or trans, registered in a weekend workshop to evaluate SE video lessons created by educators enrolled in our partner organization’s sexuality education training program. Through this process, young people leaned on both their expertise and experience to critically reflect on the content and pedagogies employed by the educators. Additionally, 14 youth participated in post-workshop interviews where they continued these conversations and reflected on their SE experiences. In contrast to queer and trans young people’s more violent experiences in classrooms, public spaces, and political discourses, this community intervention workshop cultivated community, knowledge, power, and solidarity between and among youth participants. As they used and created memes to laugh in the face of structures and situations that attempt to erase their bodies and experiences, young people reached for a vision of sexuality education that not only includes them but centres on their desires and curiosities. Full article

Wireless Body Area Networks (WBANs) are human-centric wireless networks, and implantable antennas represent a vital communication component within WBANs. The dielectric properties of human tissue are highly complex, with each layer exhibiting distinct dielectric constants that significantly influence the performance of implanted antennas. It is therefore imperative that a compact broadband implantable antenna be designed in order to address the instability in communication of medical implant devices. The antenna, coated in silicone, is a single-layer structure fed by a coaxial cable, with a volume of just 6 mm × 6 mm× 0.53 mm. A metallic patch is etched on the upper surface of the substrate, and the compact antenna design is enhanced with the introduction of S-shaped, F-shaped, and rectangular slots on the patch. The bottom side of the substrate is etched with rectangular ground planes, which broaden the impedance bandwidth of the antenna. The simulation results demonstrate that the antenna attains an impedance bandwidth of 23.8% (2.08–2.64 GHz), encompassing the entirety of the Industrial, Scientific, and Medical (ISM) band (2.4–2.48 GHz). In order to simulate the working environment of the antenna within the human body, physical tests were conducted on the antenna in pork tissue. The test results demonstrate that the antenna exhibits a measured bandwidth of 28% (2.3–3.03 GHz), with a radiation pattern that displays omnidirectional radiation characteristics. The antenna’s impedance matching and radiation characteristics remain essentially consistent in both bent and unbent states, indicating structural robustness. In comparison to other implantable antennas, this antenna displays a wider impedance bandwidth, a lower Specific Absorption Rate (SAR), and superior implant performance. Full article

This review provides a comprehensive analysis of the design, materials, fabrication techniques, and applications of flexible wearable antennas, with a primary focus on their roles in Wireless Body Area Networks (WBANs) and healthcare technologies. Wearable antennas are increasingly vital for applications that require seamless integration with the human body while maintaining optimal performance under deformation and environmental stress. Return loss, gain, bandwidth, efficiency, and the SAR are some of the most important parameters that define the performance of an antenna. Their interactions with human tissues are also studied in greater detail. Such studies are essential to ensure that wearable and body-centric communication systems perform optimally, remain safe, and are in compliance with regulatory standards. Advanced materials, including textiles, polymers, and conductive composites, are analyzed for their electromagnetic properties and mechanical resilience. This study also explores innovative fabrication techniques, such as inkjet printing, screen printing, and embroidery, which enable scalable and cost-effective production. Additionally, solutions for SAR optimization, including the use of metamaterials, electromagnetic band gap (EBG) structures, and frequency-selective surfaces (FSSs), are discussed. This review highlights the transformative potential of wearable antennas in healthcare, the IoT, and next-generation communication systems, emphasizing their adaptability for real-time monitoring and advanced wireless technologies, such as 5G and 6G. The integration of energy harvesting, biocompatible materials, and sustainable manufacturing processes is identified as a future direction, paving the way for wearable antennas to become integral to the evolution of smart healthcare and connected systems. Full article

Wearable communication technologies necessitate antenna designs that harmonize ergonomic compatibility, reliable performance, and minimal interaction with human tissues. However, high specific absorption rate (SAR) levels, limited radiation efficiency, and challenges in integration with flexible materials have significantly constrained widespread deployment. To address these limitations, this manuscript introduces a novel wearable cavity-backed substrate-integrated waveguide (SIW) antenna augmented with artificial magnetic conductor (AMC) structures. The proposed architecture is meticulously engineered using diverse textile substrates, including cotton, jeans, and jute, to synergistically integrate SIW and AMC technologies, mitigating body-induced performance degradation while ensuring safety and high radiation efficiency. The proposed design demonstrates significant performance enhancements, achieving SAR reductions to 0.672 W/kg on the spine and 0.341 W/kg on the forelimb for the cotton substrate. Furthermore, the AMC-backed implementation attains ultra-low reflection coefficients, as low as −26.56 dB, alongside a gain improvement of up to 1.37 dB, culminating in a total gain of 7.09 dBi. The impedance bandwidth exceeds the ISM band specifications, spanning 150 MHz (2.3–2.45 GHz). The design maintains remarkable resilience and operational stability under varying conditions, including dynamic bending and proximity to human body models. By substantially suppressing back radiation, enhancing directional gain, and preserving impedance matching, the AMC integration optimally adapts the antenna to body-centric communication scenarios. This study uniquely investigates the dielectric and mechanical properties of textile substrates within the AMC-SIW configuration, emphasizing their practicality for wearable applications. This research sets a precedent for wearable antenna innovation, achieving an unprecedented balance of flexibility, safety, and electromagnetic performance while establishing a foundation for next-generation wearable systems. Full article

This essay approaches the “God is dead” theme by offering a new philosophical history addressing what would make belief in divinity, in God, sustainable and unsustainable. I claim that the death of nature and the death of God in the modern era are manifestations of a progressive distancing from a religious philosophy of the Earth that guided human development until the beginnings of civilization. I outline within the space limitations here a new way of looking at the rise of civilization and the modern era by re-evaluating large-scale epochal beliefs and assumptions of progress within a context of sustainable ends and what I have termed sustainable wisdom. From an original evolved outlook I call animate mind, rooted in a religious philosophy of the living Earth, succeeding contractions of anthropocentric mind and machine-centric mind have regressively disconnected from the community of life. This trajectory courses the disconnect from the livingness of things as defining cosmos, to that of machine-centric mind in the modern era, a devolutionary elevation of the feelingless machine, of deadness, of what Erich Fromm described as cultural necrophilia. I propose rebalancing these later contractions of anthropocentric and machine-centric mind with that deeper reality of animate mind, forged as the human evolutionary legacy still present in the human body-mind today. The renewed legacy of animate mind provides a key to what a sustainable God might mean. Full article

This article introduces the Lake Environmental Data Harvester (LED) System, a robotic platform designed for the development of an innovative solution for monitoring remote alpine lakes. LED is intended as the first step in creating portable robotic tools that are lightweight, cost-effective, and highly reliable for monitoring remote water bodies. The LED system is based on the Shallow-Water Autonomous Multipurpose Platform (SWAMP), a groundbreaking Autonomous Surface Vehicle (ASV) originally designed for monitoring wetlands. The objective of LED is to achieve the comprehensive monitoring of remote lakes by outfitting the SWAMP with a suite of sensors, integrating an IoT infrastructure, and adhering to FAIR principles for structured data management. SWAMP’s modular design and open architecture facilitate the easy integration of payloads, while its compact size and construction with a reduced weight ensure portability. Equipped with four azimuth thrusters and a flexible hull structure, SWAMP offers a high degree of maneuverability and position-keeping ability for precise surveys in the shallow waters that are typical of remote lakes. In this project, SWAMP was equipped with a suite of sensors, including a single-beam dual-frequency echosounder, water-quality sensors, a winch for sensor deployment, and AirQino, a low-cost air quality analysis system, along with an RTK-GNSS (Global Navigation Satellite System) receiver for precise positioning. Utilizing commercial off-the-shelf (COTS) components, a Multipurpose Data-Acquisition System forms the basis for an Internet of Things (IoT) infrastructure, enabling data acquisition, storage, and long-range communication. This data-centric system design ensures that acquired variables from both sensors and the robotic platform are structured and managed according to the FAIR principles. Full article

As a new urban model, the 15-min city has gradually become a touchstone with which to measure the future sustainability of cities. With a time-limited planning of urban living circles, urban residents can be allowed to access basic daily needs, such as food, health and education, while walking or cycling, thus reducing motor traffic and carbon dioxide emissions and contributing to the improvement of people’s well-being and the environmental climate. Within the temporal and spatial confines of the 15-min living sphere, governmental authorities and community bodies commonly integrate public art installations into public spaces to enrich spatial dynamics, cultivate cultural identities, enhance environmental aesthetics, elevate service quality, and foster communal interactions. This study aims to probe into the impact of public art on encouraging urban pedestrianism within the specific context of the 15-min community living sphere along the Suzhou River in northern Shanghai. Drawing upon Stimulus–Organism–Response (SOR) theory, a theoretical framework is constructed to unravel the mechanisms by which public art influences residents’ propensity for walking, encompassing the attributes of public art, perceived value, and walking intention. Employing Confirmatory Factor Analysis (CFA), the model is analyzed to scrutinize the proposed hypotheses. Through this research, we establish and substantiate a novel and pertinent theoretical perspective for advancing human-centric and sustainable urban regeneration. The findings underscore that integrating public art within the framework of constructing 15-min community living spheres contributes to catalyzing proactive urban pedestrianism by enhancing its value proposition. Full article

For several decades, Brazil’s Grupo Globo, which controls radio, TV, and newspaper, served as the hegemonic voice controlling the audio, visual, and narrative dimensions of social phenomena that formed and informed social, political, and cultural attitudes among Brazilians. Of all their divisions, none has been more influential than the TV Globo network. Lately, with the popularization of free access to digital media, such as those offered by YouTube, TV Globo’s viewership has substantially declined. This paper discusses the concept of controlling images to analyze examples of TV Globo’s constructed visual image of the hypersexualized Afro-Brazilian female body in the network’s soap operas. It also analyzes cases of TV Globo’s constructed narrative over another subaltern Brazilian group: the LGBTQIA+ community. Recently, Afro-Brazilian and Queer-centric YouTube channels have attracted subscribers by emphasizing content centered on negritude, gender politics, and place of speech while deconstructing and de-normalizing Eurocentric and patriarchal controlling images. Against examples of TV Globo’s normative discourse of the past decades, the YouTube channels discussed in this paper represent alternative mediums for agency, visibility, and unbiased representations of gender and racial identities in Brazil. Full article

A conformal tri-band antenna tailored for flexible devices and body-centric wireless communications operating at the key frequency bands is proposed. The antenna is printed on a thin Rogers RT 5880 substrate, merely 0.254 mm thick, with an overall geometrical dimension of 15 × 20 × 0.254 mm³. This inventive design features a truncated corner monopole accompanied by branched stubs fed by a coplanar waveguide. The stubs, varying in length, serve as quarter-wavelength monopoles, facilitating multi-band functionality at 2.45, 3.5, and 5.8 GHz. Given the antenna’s intended applications in flexible devices and body-centric networks, the conformability of the proposed design is investigated. Furthermore, an in-depth analysis of the Specific Absorption Rate (SAR) is conducted using a four-layered human tissue model. Notably, the SAR values for the proposed geometry at 2.45, 3.5, and 5.8 GHz stand at 1.48, 1.26, and 1.1 W/kg for 1 g of tissue, and 1.52, 1.41, and 0.62 W/kg for 10 g of tissue, respectively. Remarkably, these values comfortably adhere to both FCC and European Union standards, as they remain substantially beneath the threshold values of 1.6 W/kg and 2 W/kg for 1 g and 10 g tissues, respectively. The radiation characteristics and performance of the antenna in flat and different bending configurations validate the suitability of the antenna for flexible devices and body-centric wireless communications. Full article

Medical cyber-physical systems (MCPS) represent a platform through which patient health data are acquired by emergent Internet of Things (IoT) sensors, preprocessed locally, and managed through improved machine intelligence algorithms. Wireless medical cyber-physical systems are extensively adopted in the daily practices of medicine, where vast amounts of data are sampled using wireless medical devices and sensors and passed to decision support systems (DSSs). With the development of physical systems incorporating cyber frameworks, cyber threats have far more acute effects, as they are reproduced in the physical environment. Patients’ personal information must be shielded against intrusions to preserve their privacy and confidentiality. Therefore, every bit of information stored in the database needs to be kept safe from intrusion attempts. The IWMCPS proposed in this work takes into account all relevant security concerns. This paper summarizes three years of fieldwork by presenting an IWMCPS framework consisting of several components and subsystems. The IWMCPS architecture is developed, as evidenced by a scenario including applications in the medical sector. Cyber-physical systems are essential to the healthcare sector, and life-critical and context-aware health data are vulnerable to information theft and cyber-okayattacks. Reliability, confidence, security, and transparency are some of the issues that must be addressed in the growing field of MCPS research. To overcome the abovementioned problems, we present an improved wireless medical cyber-physical system (IWMCPS) based on machine learning techniques. The heterogeneity of devices included in these systems (such as mobile devices and body sensor nodes) makes them prone to many attacks. This necessitates effective security solutions for these environments based on deep neural networks for attack detection and classification. The three core elements in the proposed IWMCPS are the communication and monitoring core, the computational and safety core, and the real-time planning and administration of resources. In this study, we evaluated our design with actual patient data against various security attacks, including data modification, denial of service (DoS), and data injection. The IWMCPS method is based on a patient-centric architecture that preserves the end-user’s smartphone device to control data exchange accessibility. The patient health data used in WMCPSs must be well protected and secure in order to overcome cyber-physical threats. Our experimental findings showed that our model attained a high detection accuracy of 92% and a lower computational time of 13 sec with fewer error analyses. Full article

While the digitalization of products and services in the entertainment industry has gained momentum in the last decades, online theater streaming is a relatively new phenomenon boosted by the COVID-19 restrictions, which created new market opportunities—and demand—for theaters’ online presence. This study investigates a new online platform providing theater streaming services in Hungary from a customer-centric, technology acceptance point of view. The survey-based study is designed to examine which factors of the Unified Theory of Acceptance and Use of Technology 2 (UTAUT2) model are—and were—relevant in the under-researched live performance art sector of the digital entertainment industry under the unprecedented, coercive conditions of pandemic lockdowns. The results of the partial least squares structural equation modeling (PLS-SEM) show that habit is the most influential factor of theater webcasting adoption (before hedonic motivations and price value), suggesting that the new habits formed during the COVID-19 lockdowns might serve as a basis of a sustainable digital business model for theatres in the post-pandemic era as well. The analysis also tested for potential generational differences between cohorts of users, finding no significant ones, which suggests that, under this specific set of social, technology and market conditions, all generations react similarly and are equally relevant for widening the customer base. Keeping in mind some limitations (self-reported and cross-sectional data), these empirical results can not only enrich the scientific body of knowledge but can also serve as the basis of future marketing and communication strategies developed by partitioners. Full article

Simulation-based clinical education is a useful strategy for teaching, learning, and assessing clinical competence in health professions education. However, the use of simulation-based clinical nursing education (SBCNE) in low-resource settings such as Ghana has been hampered by the lack of a context-specific framework to guide its design, implementation, and evaluation. This study sought to develop a context-specific framework to guide the design, implementation, and evaluation of SBCNE in a low-resource setting. The study employed a sequential multimethod design, comprising a scoping review; qualitative descriptive design (situational analysis) made up of two parts–focus group discussions (FGDs) with post-registration nurses and nursing students, and semi-structured interviews with nurse educators; and narrative synthesis of the scoping review and situational analysis data, used to develop a draft SBCNE framework for a low-resource setting. The draft SBCNE framework was evaluated by stakeholders of nursing education and practice using nominal group discussions. The framework is comprised of five constructs (context, planning, design, community of learning, and outcomes). The user-centric, comprehensive, context-specific SBCNE framework has the potential to enhance the implementation of simulation in nursing education and the development of clinical competence in a low-resource setting. As a result, we urge nursing leaders and nurse educator unions to take the lead in lobbying regulatory bodies, the central government, and their development partners to provide the necessary financial support and resources for the implementation of the framework and adoption of SBCNE in low-resource settings. Full article

Never before have there been so many ecological datasets available. The organization, accessibility, and collection of ecological datasets create more opportunities among researchers to find new and original questions, perform strong analytical analyses, and gain reliability among the results obtained through alternative methodologies. In addition, increasing the number of ecological datasets in ecoregions and organisms more susceptible to global change may be particularly useful, in order to improve the understanding of ecological processes and mechanisms. Freshwater fish communities in the Iberian Peninsula show unique biological characteristics and high levels of endemicity, but they are sadly impaired by human impacts, including nutrient pollution, landscape changes, and climate warming. Despite previous efforts in creating publicly archived datasets of Iberian fish, most of them are based on specific geographical areas or species-centric approaches, including species occurrences and relative abundances. The individual body size of fish is the simplest metric to collect from the field but it has strong implications on the most physiological, ecological, and evolutionary processes of fish. Thus, a complete raw dataset covering broad spatial and temporal gradients of freshwater fish in the Iberian Peninsula, with information on the fish length and weight, would be a key step if we want to synthesize our current knowledge of Iberian fish trends in space and time. In this talk, we reflect on our own opinion on the how, the why, and the what of having such a dataset. We point out that a new open fish dataset of individual body size would fulfill its potential to advance the knowledge of freshwater fish in the Iberian Peninsula, and develop efficient management plans using size-based approaches, such as the community size spectrum or functional size diversity. We also emphasize that environmental factors (e.g., altitude, ecosystem size) that need to be integrated with the information of the biotic communities. Finally, we provide several suggestions to build this dataset by searching for synergies among researchers and practitioners to create a single unifying standard dataset of fish individual body size across freshwater habitats in the Iberian Peninsula. Full article

A button sensor antenna for on-body monitoring in wireless body area network (WBAN) systems is presented. Due to the close coupling between the sensor antenna and the human body, it is highly challenging to design sensor antenna devices. In this paper, a mechanically robust system is proposed that integrates a dual-band button antenna with a wireless sensor module designed on a printed circuit board (PCB). The system features a small footprint and has good radiation characteristics and efficiency. This was fabricated, and the measured and simulated results are in good agreement. The design offers a wide range of omnidirectional radiation patterns in free space, with a reflection coefficient (S₁₁) of $-29.30 \left(-30.97\right)$ dB, a maximum gain of $1.75 \left(5.65\right)$ dBi, and radiation efficiency of $71.91 \left(92.51\right)$% in the lower and upper bands, respectively. S₁₁ reaches $-23.07 \left(-27.07\right)$ dB and $-30.76 (-31.12$) dB, respectively, with a gain of $2.09 \left(6.70\right)$ dBi and $2.16 \left(5.67\right)$ dBi, and radiation efficiency of $65.12 \left(81.63\right)\%$ and $75.00 \left(85.00\right)\%$, when located on the body for the lower and upper bands, respectively. The performance is minimally affected by bending, movement, and fabrication tolerances. The specific absorption rate (SAR) values are below the regulatory limitations for the spatial average over 1 g (1.6 W/Kg) and 10 g of tissues (2.0 W/Kg). For both indoor and outdoor conditions, experimental results of the range tests confirm the coverage of up to 40 m. Full article