Enhancing the Relevance and Effectiveness of Water Safety Education for Ethnic and Racial Minorities

In this paper we explore the ways in which culturally based beliefs, attitudes, and behaviours influence participation in and the development and delivery of water safety education programs. We examine existing data pertaining to ethnic and racial minorities’ drowning rates and argue that these groups’ high rates of drowning are related to a failure to understand and account for non-Eurocentric beliefs, attitudes, and behaviors, and issues of social exclusion. We then summarize health communication strategies and provide real-life examples of these strategies at work in water safety education. Finally, we identify four overarching promising practices to enhance the relevance and effectiveness of water education programs targeted at ethnic and cultural minorities. In short, we argue that literature pertaining to cultural aspects of water safety needs to be translated into evidence-based approaches that fundamentally change the ways in which water safety education programs are designed and delivered

Route Towards a Label-free Optical Waveguide Sensing Platform Based on Lossy Mode Resonances

According to recent market studies of the North American company Allied Market Research, the field of photonic sensors is an emerging strategic field for the following years and it is expected to garner $18 billion by 2021. The integration of micro and nanofabrication technologies in the field of sensors has allowed the development of new technological concepts such as lab-on-a-chip, which have achieved extraordinary advances in terms of detection and applicability, for example in the field of biosensors. This continuous development has allowed that equipment consisting of many complex devices that occupied a whole room a few years ago, at present it is possible to handle them in the palm of the hand; that formerly long duration processes are carried out in a matter of milliseconds and that a technology previously dedicated solely to military or scientific uses is available to the vast majority of consumers. The adequate combination of micro and nanostructured coatings with optical fiber sensors has permitted us to develop novel sensing technologies, such as the first experimental demonstration of lossy mode resonances (LMRs) for sensing applications, with more than one hundred citations and related publications in high rank journals and top conferences. In fact, fiber optic LMR-based devices have been proven as devices with one of the highest sensitivity for refractometric applications. Refractive index sensitivity is an indirect and simple indicator of how sensitive the device is to chemical and biological species, topic where this proposal is focused. Consequently, the utilization of these devices for chemical and biosensing applications is a clear opportunity that could open novel and interesting research lines and applications as well as simplify current analytical methodologies. As a result, on the basis of our previous experience with LMR based sensors to attain very high sensitivities, the objective of this paper is presenting the route for the development of label-free optical waveguide sensing platform based on LMRs that enable to explore the limits of this technology for bio-chemosensing applications

Fiber-optic lossy mode resonance sensors

In the last 4 years, experimental evidences about the potential use of optical sensors based on Lossy Mode Resonances (LMR) have been presented in the literature. These LMR sensors have some similarities with Surface Plasmon Resonance (SPR) sensors, the gold standard in label-free, real-time biomolecular interaction analysis. In these new LMR sensors, if the non-metallic nanocladding of an optical waveguide fulfills the conditions explained in this work, coupling of light to the cladding modes happens at certain resonance wavelengths, which enables the use of LMR devices as refractometers and opens the door to diverse applications such as in biology and proteomics research. These highly sensitive refractometers have already shown sensitivities higher than 20,000 nm/RIU or 5x10-7 RIU and, given the youth of this field, it is expected to achieve even better values

Tunable Sensitivity in Long Period Fiber Gratings During Mode Transition With Low Refractive Index Intermediate Layer

Double-clad fibers where the second cladding has a lower refractive index than the first cladding, prove to be ideal structures for potentiating and tuning the sensitivity in long-period fiber gratings (LPFGs) operating in mode transition. When a thin film is deposited on the optical fiber, the second cladding performs acts as a barrier that initially prevents the transition to guidance in the thin film of one of the modes guided in the first cladding. Finally, the transition to guidance occurs with a sensitivity increase, in analogy to the tunnel effect observed in semiconductors. This improvement has been demonstrated both as a function of the thin film thickness and the surrounding medium refractive index, with enhancement factors of 4 and 2, respectively. This idea reinforces the performance of LPFGs, adding a new degree of freedom to the mode transition and the dispersion turning point phenom- ena. Moreover, the control of the variation of the effective index of cladding modes could be applied in other structures, such as tilted-fiber gratings or evanescent wave sensors

Optical sensors based on lossy-mode resonances

Lossy-mode resonance (LMR)–based optical sensing technology has emerged in the last two decades as a nanotechnological platform with very interesting and promising properties. LMR complements the metallic materials typically used in surface plasmon resonance (SPR)–based sensors, with metallic oxides and polymers. In addition, it enables one to tune the position of the resonance in the optical spectrum, to excite the resonance with both transverse electric (TE) and transverse magnetic (TM) polarized light, and to generate multiple resonances. The domains of application are numerous: as sensors for detection of refractive indices voltage, pH, humidity, chemical species, and antigens, as well as biosensors. This review will discuss the bases of this relatively new technology and will show the main contributions that have permitted the optimization of its performance to the point that the question arises as to whether LMR–based optical sensors could become the sensing platform of the near future

Telerehabilitation as a Method for Achieving Competencies in Physical and Rehabilitation Medicine Residency Training in a Developing Country: A Protocol for a Pilot Mixed-Methods Study

BackgroundIn the second year of the COVID-19 pandemic, Physical and Rehabilitation Medicine (PRM) residents in a developing country continue to face a lack of in-person clinical exposure and learning opportunities. With the unprecedented shift to virtual care, it remains uncertain whether residents can achieve PRM competencies using telerehabilitation as a method of instruction.ObjectiveTo determine the PRM residents' ability to achieve competencies through telerehabilitation, as perceived by different stakeholders (residents, chief residents, training officers, and department heads).MethodsThis will be a pilot mixed-methods study, employing concurrent triangulation, in the Department of Rehabilitation Medicine in one large private medical center and one large government hospital in Manila, Philippines. There will be two phases of online data collection upon approval by their respective research ethics board. The first phase will involve an online Likert-scale questionnaire to obtain the residents' self-perceived attainment of competencies and learning of PRM topics and skills specified by the International Society of Physical and Rehabilitation Medicine and the Philippine Board of Rehabilitation Medicine. The results of the survey will then be summarized and presented in a focus group discussion (FGD) with the department heads, training officers, and chief residents of the two institutions in an attempt to explain the residents' perceptions on their competencies achieved through virtual care. Afterwards, the qualitative data obtained from the FGD will then be thematically analyzed, and mixed methods integration will be employed to generate knowledge and recommendations.DiscussionIt is hypothesized that the majority of the residents had little to no experience with telerehabilitation pre-pandemic. Suddenly telerehabilitation was used to augment clinical training during the pandemic. It is uncertain whether telerehabilitation can help residents achieve competencies in the different domains of training, namely: patient safety and quality patient care; medical knowledge and procedural skills; interpersonal and communication skills; practice- and systems-based learning and improvement; reintegration of people with disabilities into the society; medical ethics and public health; quality assurance; policies of care and prevention for disabled people; and professionalism. The study results can provide insights on the aspects of a PRM curriculum that may have to be modified to ensure the training program is sensitive and appropriate to the changing training needs of the residents amid the pandemic and similar crises that may disrupt in-person clinical encounters in the future

Flux Compactifications: Stability and Implications for Cosmology

We study the dynamics of the size of an extra-dimensional manifold stabilised by fluxes. Inspecting the potential for the 4D field associated with this size (the radion), we obtain the conditions under which it can be stabilised and show that stable compactifications on hyperbolic manifolds necessarily have a negative four-dimensional cosmological constant, in contradiction with experimental observations. Assuming compactification on a positively curved (spherical) manifold we find that the radion has a mass of the order of the compactification scale, M_c, and Planck suppressed couplings. We also show that the model becomes unstable and the extra dimensions decompactify when the four-dimensional curvature is higher than a maximum value. This in particular sets an upper bound on the scale of inflation in these models: V_max \sim M_c^2 M_P^2, independently of whether the radion or other field is responsible for inflation. We comment on other possible contributions to the radion potential as well as finite temperature effects and their impact on the bounds obtained.Comment: 16 pages, 1 figure, LaTeX; v2: typos fixed and references adde