This paper positions sustainable mass tourism (SMT) as the desired and impending outcome for most destinations. Natural resource scarcity, development of green technology, climate change awareness, ...the global financial crisis, institutionalised environmentalism and Internet technology all facilitate the emergence of sustainability as a societal norm that is combining with the longer established norm of growth desirability. SMT convergence is occurring along three distinctive paths in an evolutionary manner that reflects environmental pragmatism. The market-driven ‘organic’ path describes the conventional tourism area life cycle model of Butler, whilst the regulation-driven ‘incremental’ path entails deliberate alternative tourism (DAT) in which carrying capacities are gradually increased to accommodate higher visitation levels. The hybrid ‘induced’ path describes planned mega-resorts conceived as growth poles. Each model is invested with its own specific planning and management implications.
► Destinations are converging on sustainable mass tourism as the desired and normative state. ► Five factors are facilitating this trend. ► Convergence is occurring along organic, incremental and induced evolutionary paths.
Current “second generation” approaches to visitation in higher order protected areas are based on biocentric management and monitoring that positions visitors as an inherent threat. The result is ...suboptimal sustainability outcomes of coexistence and possibly increased conflict in an era of escalating demand, reduced public funding and growing threats to global and local biodiversity. A “third generation” model is therefore required that repositions visitors as an inherent opportunity, and augments management and monitoring accordingly with visitor motivation and mobilisation for mass participation in on-site park enhancement activities. Strategies and issues for implementation - including the model's dialectical underpinnings and its relationship to a broader context of people-focused park management -are considered, toward achieving optimal sustainability outcomes of park/visitation symbiosis.
•Three generations of protected area visitor management paradigms proposed.•Limitations of current (second generation) model identified.•Third generation model augments current model with motivation and mobilisation.•Third generation model fills visitor gap in people-focused park management approach.
We perform a spectroscopic analysis of 492 450 galaxy spectra from the first two years of observations of the Sloan Digital Sky Survey (SDSS) III/Baryonic Oscillation Spectroscopic Survey (BOSS) ...collaboration. This data set has been released in the ninth SDSS data release, the first public data release of BOSS spectra. We show that the typical signal-to-noise ratio of BOSS spectra, despite being low, is sufficient to measure stellar velocity dispersion and emission line fluxes for individual objects. We show that the typical velocity dispersion of a BOSS galaxy is ∼240 km s−1. The typical error in the velocity dispersion measurement is 14 per cent, and 93 per cent of BOSS galaxies have velocity dispersions with an accuracy of better than 30 per cent. The distribution in velocity dispersion is redshift independent between redshifts 0.15 and 0.7, which reflects the survey design targeting massive galaxies with an approximately uniform mass distribution in this redshift interval. We show that emission lines can be measured on BOSS spectra. However, the majority of BOSS galaxies lack detectable emission lines, as is to be expected because of the target selection design towards massive galaxies. We analyse the emission line properties and present diagnostic diagrams using the emission lines O ii, Hβ, O iii, Hα and N ii (detected in about 4 per cent of the galaxies) to separate star-forming objects and active galactic nuclei (AGN). We show that the emission line properties are strongly redshift dependent and that there is a clear correlation between observed frame colours and emission line properties. Within in the low-z sample (LOWZ) around 0.15 < z < 0.3, half of the emission line galaxies have low-ionization nuclear emission-line region (LINER)-like emission line ratios, followed by Seyfert-AGN-dominated spectra, and only a small fraction of a few per cent are purely star-forming galaxies. AGN and LINER-like objects, instead, are less prevalent in the high-z sample (CMASS) around 0.4 < z < 0.7, where more than half of the emission line objects are star forming. This is a pure selection effect caused by the non-detection of weak Hβ emission lines in the BOSS spectra. Finally, we show that star-forming, AGN and emission line free galaxies are well separated in the g − r versus r − i target selection diagram.
The ecotourism literature is focused on market segmentation, ecological impacts of wildlife viewing, and community-based ecotourism, but there has been minimal attention to critical areas such as ...quality control, the industry, external environments or institutions even as the components and parameters of ecotourism are being extended. This imbalance, combined with the fragmentation and lack of integration within the literature, suggest that ecotourism, as a field of academic inquiry, is still in a state of adolescence.
We perform a semi-automated search for strong gravitational lensing systems in the 9000 deg2 Dark Energy Camera Legacy Survey (DECaLS), part of the Dark Energy Spectroscopic Instrument Legacy Imaging ...Surveys. The combination of the depth and breadth of these surveys are unparalleled at this time, making them particularly suitable for discovering new strong gravitational lensing systems. We adopt the deep residual neural network architecture developed by Lanusse et al. for the purpose of finding strong lenses in photometric surveys. We compile a training sample that consists of known lensing systems in the Legacy Surveys and the Dark Energy Survey as well as non-lenses in the footprint of DECaLS. In this paper we show the results of applying our trained neural network to the cutout images centered on galaxies typed as ellipticals in DECaLS. The images that receive the highest scores (probabilities) are visually inspected and ranked. Here we present 335 candidate strong lensing systems, identified for the first time.
Superparamagnetic iron oxide nanoparticles with highly nonlinear magnetic behavior are attractive for biomedical applications like magnetic particle imaging and magnetic fluid hyperthermia. Such ...particles display interesting magnetic properties in alternating magnetic fields and here we document experiments that show differences between the magnetization dynamics of certain particles in frozen and melted states. This effect goes beyond the small temperature difference (Δ
~ 20 °C) and we show the dynamics to be a mixture of Brownian alignment of the particles and Néel rotation of their moments occurring in liquid particle suspensions. These phenomena can be modeled in a stochastic differential equation approach by postulating log-normal distributions and partial Brownian alignment of an effective anisotropy axis. We emphasize that precise particle-specific characterization through experiments and nonlinear simulations is necessary to predict dynamics in solution and optimize their behavior for emerging biomedical applications including magnetic particle imaging.
We examined how different types of health information-seeking behaviors (HISBs)-no use, illness information only, wellness information only, and illness and wellness information combined-are ...associated with health risk factors and health indicators to determine possible motives for health information seeking.
A sample of 559 Seattle-Tacoma area adults completed an Internet-based survey in summer 2006. The survey assessed types of HISB, physical and mental health indicators, health risks, and several covariates. Covariate-adjusted linear and logistic regression models were computed.
Almost half (49.4%) of the sample reported HISBs. Most HISBs (40.6%) involved seeking a combination of illness and wellness information, but both illness-only (28.6%) and wellness-only (30.8%) HISBs were also widespread. Wellness-only information seekers reported the most positive health assessments and the lowest occurrence of health risk factors. An opposite pattern emerged for illness-only information seekers.
Our findings reveal a unique pattern of linkages between the type of health information sought (wellness, illness, and so on) and health self-assessment among adult Internet users in western Washington State. These associations suggest that distinct health motives may underlie HISB, a phenomenon frequently overlooked in previous research.
This article analyzed a living cultural heritage destination's adaptive resilience from the perspective of social-ecological systems (SES). The aim was to test the SES framework at Hoi An Ancient ...Town, a cultural World Heritage Site in central Viet Nam by (1) delineating the adaptive renewal cycle in the historical context of destination development; (2) examining community resilience to spatio-cultural changes induced by mass tourism; and (3) identifying characteristics of tourism systems via the control mechanisms of the panarchy's cross-scale interactions. Findings from Hoi An extend the conventional SES approach by revealing the complex context of social relationships that typify human-related adaptation in cultural living heritage destinations. Contrary to conventional SES theory that depicts cross-scale interactions as one-way mechanisms, we propose a multidimensional model of twin interactions concurrently characterized by contrasting forces of bottom-up "revolt" and top-down "remember" functions. Findings from historical, contemporary and systematic dimensions shed light on incorporating Indigenous knowledge and practices into heritage conservation as a form of community resilience. Our analysis also extends the continuity notion of a living heritage site in developing countries, applying an SES framework to complex political, social, cultural and economic concerns in order to contextualize tourism development in Hoi An.
Social media are designed to be engaging, but often are used as a mechanism by public health organizations and practitioners for mass information dissemination rather than engaging audiences in true ...multi-way conversations and interactions. In this article we define and discuss social media engagement for public health communication. We examine different levels of engagement for public health communication and consider the potential risks, benefits, and challenges of truly embracing the social component in public health practice. Some implications of engagement for public health communication via social media are addressed, and recommendations for future work and research are proposed. PUBLICATION ABSTRACT
Accurate temperature measurements are essential to safe and effective thermal therapies for cancer and other diseases. However, conventional thermometry is challenging so using the heating agents ...themselves as probes allows for ideal local measurements. Here, we present a new noninvasive method for measuring the temperature of the microenvironment surrounding magnetic nanoparticles from the Brownian relaxation time of nanoparticles. Experimentally, the relaxation time can be determined from the nanoparticle magnetization induced by an alternating magnetic field at various applied frequencies. A previously described method for nanoparticle temperature estimation used a low frequency Langevin function description of magnetic dipoles and varied the excitation field amplitude to estimate the energy state distribution and the corresponding temperature. We show that the new method is more accurate than the previous method at higher applied field frequencies that push the system farther from equilibrium.
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