Unpacking overtourism as a discursive formation through interdiscursivity

Purpose As tourism destinations grapple with declines in tourist arrivals due to COVID-19 measures, scholarly debate on overtourism remains active, with discussions on solutions that could be enacted to contain the excessive regrowth of tourism and the return of “overtourism”. As social science holds an important role and responsibility to inform the debate on overtourism, this paper aims to understand overtourism by examining it as a discursive formation. Design/methodology/approach The paper explores recurring thematic threads in scholarly overtourism texts, given the phrases coherence as a nodal-point is partially held in place by a collective body of texts authored by a network of scholars who have invested in it. The paper uses interdiscursivity as an interpretative framework to identify overlapping thematic trajectories found in existing discourses. Findings Overtourism, as a discursive formation, determines what can and should be said about the self-evident “truths” of excessive tourist arrivals, the changes tourists bring to destinations and the range of discursive solutions available to manage or end overtourism. As the interpellation of these thematic threads into scholarly texts is based on a sense of crisis and urgency, the authors find that the themes contain rhetoric, arguments and metaphors that problematise tourists and construct them as objects in need of control and correction. Originality/value While the persistence of the discursive formation will be determined by the degree to which scholarly and other actors recognise themselves in it, this paper may enable overtourism scholars to become aware of the limits of their discursive domain and help them to expand the discourse or weave a new one. 设计/方法论/方法 本文探讨了过度旅游研究文本中反复出现的主题线索, 鉴于这些短语连贯性作为一个节点, 由学者们组成的网络所研究的一组文本所组成。本文将互辩作为一个解释框架来识别现有语篇中重叠的主题轨迹。 目的 随着旅游目的地应对因新冠病毒−19措施而导致的游客人数下降, 关于过度旅游的学术辩论仍然活跃, 通过讨论可以制定的解决方案, 以遏制旅游业的过度再生和“过度旅游”的再现。由于社会科学在有关过度旅游的辩论中扮演着重要的角色和责任, 本文试图通过将其作为一种话语形式进行考察来理解过度旅游。 结果 作为一种话语形式, 过度旅游展现了过量游客所带来的不言而喻的“真相”、游客给目的地带来的变化以及可用于管理或结束过度旅游的一系列解决方案。由于这些主题线索在学术文本中的质询是基于危机感和紧迫感, 我们发现这些主题包含修辞、论据和隐喻, 使游客感到困惑, 并将其构建为需要控制和纠正的对象。 创新/价值 尽管话语形成的持续性将取决于学者和其他参与者在其中认识到自己的程度, 但本文可能会使过度旅游学者意识到其话语领域的局限性, 并帮助他们扩展话语或构建新的话语。 Propósito A medida que los destinos turísticos lidian con la disminución de las llegadas de turistas debido a las medidas del COVID-19, el debate académico sobre el “sobreturismo” permanece activo, con discusiones sobre soluciones que podrían promulgarse para contener el crecimiento excesivo del turismo y el regreso del “sobreturismo”. La ciencia tiene un papel importante y una responsabilidad en informar sobre el debate del “sobreturismo”, este artículo busca entender el constructo de “sobreturismo”, examinándolo como una formación discursiva. Diseño/metodología/enfoque El artículo explora los hilos temáticos recurrentes en los textos académicos sobre el “sobreturismo”, dada la coherencia de las frases como un punto nodal, mantenida parcialmente en su lugar, por un cuerpo colectivo de textos escritos por una red de académicos, los cuales han invertido tiempo en ellos. El artículo utiliza la inter-discursividad como marco interpretativo a la hora de identificar trayectorias temáticas superpuestas que se encuentran en las disertaciones existentes. Hallazgos El sobreturismo, como formación discursiva, determina lo que puede y debe decirse sobre las “verdades” evidentes de la llegada excesiva de turistas, los cambios que los turistas traen a los destinos y la gama de soluciones discursivas disponibles para gestionar o acabar con el “sobreturismo”. Como la interpelación de estos hilos temáticos en textos académicos se basa en un sentido de crisis y urgencia, encontramos que los temas contienen retórica, argumentos y metáforas que problematizan a los turistas y los construyen como objetos que necesitan control y corrección. Originalidad/valor Si bien la persistencia de la formación discursiva estará determinada por el grado en que los académicos y otros actores se reconozcan en ella, este artículo puede permitir a los estudiosos del “sobreturismo” tomar conciencia de los límites de su dominio discursivo y ayudarlos a expandir el discurso o tejer un discurso nuevo.Purpose As tourism destinations grapple with declines in tourist arrivals due to COVID-19 measures, scholarly debate on overtourism remains active, with discussions on solutions that could be enacted to contain the excessive regrowth of tourism and the return of “overtourism”. As social science holds an important role and responsibility to inform the debate on overtourism, this paper aims to understand overtourism by examining it as a discursive formation. Design/methodology/approach The paper explores recurring thematic threads in scholarly overtourism texts, given the phrases coherence as a nodal-point is partially held in place by a collective body of texts authored by a network of scholars who have invested in it. The paper uses interdiscursivity as an interpretative framework to identify overlapping thematic trajectories found in existing discourses. Findings Overtourism, as a discursive formation, determines what can and should be said about the self-evident “truths” of excessive tourist arrivals, the changes tourists bring to destinations and the range of discursive solutions available to manage or end overtourism. As the interpellation of these thematic threads into scholarly texts is based on a sense of crisis and urgency, the authors find that the themes contain rhetoric, arguments and metaphors that problematise tourists and construct them as objects in need of control and correction. Originality/value While the persistence of the discursive formation will be determined by the degree to which scholarly and other actors recognise themselves in it, this paper may enable overtourism scholars to become aware of the limits of their discursive domain and help them to expand the discourse or weave a new one. 设计/方法论/方法 本文探讨了过度旅游研究文本中反复出现的主题线索, 鉴于这些短语连贯性作为一个节点, 由学者们组成的网络所研究的一组文本所组成。本文将互辩作为一个解释框架来识别现有语篇中重叠的主题轨迹。 目的 随着旅游目的地应对因新冠病毒−19措施而导致的游客人数下降, 关于过度旅游的学术辩论仍然活跃, 通过讨论可以制定的解决方案, 以遏制旅游业的过度再生和“过度旅游”的再现。由于社会科学在有关过度旅游的辩论中扮演着重要的角色和责任, 本文试图通过将其作为一种话语形式进行考察来理解过度旅游。 结果 作为一种话语形式, 过度旅游展现了过量游客所带来的不言而喻的“真相”、游客给目的地带来的变化以及可用于管理或结束过度旅游的一系列解决方案。由于这些主题线索在学术文本中的质询是基于危机感和紧迫感, 我们发现这些主题包含修辞、论据和隐喻, 使游客感到困惑, 并将其构建为需要控制和纠正的对象。 创新/价值 尽管话语形成的持续性将取决于学者和其他参与者在其中认识到自己的程度, 但本文可能会使过度旅游学者意识到其话语领域的局限性, 并帮助他们扩展话语或构建新的话语。 Propósito A medida que los destinos turísticos lidian con la disminución de las llegadas de turistas debido a las medidas del COVID-19, el debate académico sobre el “sobreturismo” permanece activo, con discusiones sobre soluciones que podrían promulgarse para contener el crecimiento excesivo del turismo y el regreso del “sobreturismo”. La ciencia tiene un papel importante y una responsabilidad en informar sobre el debate del “sobreturismo”, este artículo busca entender el constructo de “sobreturismo”, examinándolo como una formación discursiva. Diseño/metodología/enfoque El artículo explora los hilos temáticos recurrentes en los textos académicos sobre el “sobreturismo”, dada la coherencia de las frases como un punto nodal, mantenida parcialmente en su lugar, por un cuerpo colectivo de textos escritos por una red de académicos, los cuales han invertido tiempo en ellos. El artículo utiliza la inter-discursividad como marco interpretativo a la hora de identificar trayectorias temáticas superpuestas que se encuentran en las disertaciones existentes. Hallazgos El sobreturismo, como formación discursiva, determina lo que puede y debe decirse sobre las “verdades” evidentes de la llegada excesiva de turistas, los cambios que los turistas traen a los destinos y la gama de soluciones discursivas disponibles para gestionar o acabar con el “sobreturismo”. Como la interpelación de estos hilos temáticos en textos académicos se basa en un sentido de crisis y urgencia, encontramos que los temas contienen retórica, argumentos y metáforas que problematizan a los turistas y los construyen como objetos que necesitan control y corrección. Originalidad/valor Si bien la persistencia de la formación discursiva estará determinada por el grado en que los académicos y otros actores se reconozcan en ella, este artículo puede permitir a los estudiosos del “sobreturismo” tomar conciencia de los límites de su dominio discursivo y ayudarlos a expandir el discurso o tejer un discurso nuevo.status: Published onlin

Coexistence and critical behaviour in a lattice model of competing species

In the present paper we study a lattice model of two species competing for the same resources. Monte Carlo simulations for d=1, 2, and 3 show that when resources are easily available both species coexist. However, when the supply of resources is on an intermediate level, the species with slower metabolism becomes extinct. On the other hand, when resources are scarce it is the species with faster metabolism that becomes extinct. The range of coexistence of the two species increases with dimension. We suggest that our model might describe some aspects of the competition between normal and tumor cells. With such an interpretation, examples of tumor remission, recurrence and of different morphologies are presented. In the d=1 and d=2 models, we analyse the nature of phase transitions: they are either discontinuous or belong to the directed-percolation universality class, and in some cases they have an active subcritical phase. In the d=2 case, one of the transitions seems to be characterized by critical exponents different than directed-percolation ones, but this transition could be also weakly discontinuous. In the d=3 version, Monte Carlo simulations are in a good agreement with the solution of the mean-field approximation. This approximation predicts that oscillatory behaviour occurs in the present model, but only for d>2. For d>=2, a steady state depends on the initial configuration in some cases.Comment: 11 pages, 14 figure

Microscopic Surface Structure of Liquid Alkali Metals

We report an x-ray scattering study of the microscopic structure of the surface of a liquid alkali metal. The bulk liquid structure factor of the eutectic K67Na33 alloy is characteristic of an ideal mixture, and so shares the properties of an elemental liquid alkali metal. Analysis of off-specular diffuse scattering and specular x-ray reflectivity shows that the surface roughness of the K-Na alloy follows simple capillary wave behavior with a surface structure factor indicative of surface induced layering. Comparison of thelow-angle tail of the K67Na33 surface structure factor with the one measured for liquid Ga and In previously suggests that layering is less pronounced in alkali metals. Controlled exposure of the liquid to H2 and O2 gas does not affect the surface structure, indicating that oxide and hydride are not stable at the liquid surface under these experimental conditions.Comment: 12 pages, 3 figures, published in Phys. Rev.

Surface Structure of Liquid Metals and the Effect of Capillary Waves: X-ray Studies on Liquid Indium

We report x-ray reflectivity (XR) and small angle off-specular diffuse scattering (DS) measurements from the surface of liquid Indium close to its melting point of $156^\circ$C. From the XR measurements we extract the surface structure factor convolved with fluctuations in the height of the liquid surface. We present a model to describe DS that takes into account the surface structure factor, thermally excited capillary waves and the experimental resolution. The experimentally determined DS follows this model with no adjustable parameters, allowing the surface structure factor to be deconvolved from the thermally excited height fluctuations. The resulting local electron density profile displays exponentially decaying surface induced layering similar to that previously reported for Ga and Hg. We compare the details of the local electron density profiles of liquid In, which is a nearly free electron metal, and liquid Ga, which is considerably more covalent and shows directional bonding in the melt. The oscillatory density profiles have comparable amplitudes in both metals, but surface layering decays over a length scale of $3.5\pm 0.6$ \AA for In and $5.5\pm 0.4$ \AA for Ga. Upon controlled exposure to oxygen, no oxide monolayer is formed on the liquid In surface, unlike the passivating film formed on liquid Gallium.Comment: 9 pages, 5 figures; submitted to Phys. Rev.

Monitoring environmental supporting conditions of a raised bog using remote sensing techniques

Conventional methods of monitoring wetlands and detecting changes over time can be time-consuming and costly. Inaccessibility and remoteness of many wetlands is also a limiting factor. Hence, there is a growing recognition of remote sensing techniques as a viable and cost-effective alternative to field-based ecosystem monitoring. Wetlands encompass a diverse array of habitats, for example, fens, bogs, marshes, and swamps. In this study, we concentrate on a natural wetland – Clara Bog, Co. Offaly, a raised bog situated in the Irish midlands. The aim of the study is to identify and monitor the environmental conditions of the bog using remote sensing techniques. Environmental conditions in this study refer to the vegetation composition of the bog and whether it is in an intact (peat-forming) or degraded state. It can be described using vegetation, the presence of water (soil moisture) and topography. Vegetation indices (VIs) derived from satellite data have been widely used to assess variations in properties of vegetation. This study uses mid-resolution data from Sentinel-2 MSI, Landsat 8 OLI for VI analysis. An initial study to delineate the boundary of the bog using the combination of edge detection and segmentation techniques namely, entropy filtering, canny edge detection, and graph-cut segmentation is performed. Once the bog boundary is defined, spectra of the delineated area are studied. VIs like NDVI, ARVI, SAVI, NDWI, derived using Sentinel-2 MSI and Landsat 8 OLI are analysed. A digital elevation model (DEM) was also used for better classification. All of these characteristics (features) serve as a basis for classifying the bog into broad vegetation communities (termed ecotopes) that indicate the quality of raised bog habitat. This analysis is validated using field derived ecotopes. The results show that, by using spectral information and vegetation index clustering, an additional linkage can be established between spectral RS signatures and wetland ecotopes. Hence, the benefit of the study is in understanding ecosystem (bog) environmental conditions and in defining appropriate metrics by which changes in the conditions can be monitored.</p

Surface Layering in Liquid Gallium: An X-Ray Reflectivity Study

Surface-induced atomic layering in liquid gallium has been observed using x-ray reflectivity, ultrahigh vacuum conditions, and sputtered clean surfaces. Reflectivity data, collected on a supercooled liquid sample to momentum transfers as large as $q_z$ = 3.0 Å$^{-1}$, exhibit a strong maximum near 2.4 Å$^{-1}$ indicating a layer spacing that is comparable to its atomic dimensions. The amplitude of the electron density oscillations decays with a characteristic length of 6 Å. This is unexpectedly twice that of recent results for Hg, and the difference may be related to covalent bonding or supercooling.Engineering and Applied Science

Lifetime determination of excited states in Cd-106

Two separate experiments using the Differential Decay Curve Method have been performed to extract mean lifetimes of excited states in 106 Cd. The inedium-spin states of interest were populated by the Mo-98(C-12, 4n) Cd-106 reaction performed at the Wright Nuclear Structure Lab., Yale University. From this experiment, two isomeric state mean lifetimes have been deduced. The low-lying states were populated by the Mo-96(C-13, 3n)Cd-106 reaction performed at the Institut fur Kernphysik, Universitat zu Koln. The mean lifetime of the I-pi = 2(1)(+) state was deduced, tentatively, as 16.4(9) ps. This value differs from the previously accepted literature value from Coulomb excitation of 10.43(9) ps

Properties of small molecular drug loading and diffusion in a fluorinated PEG hydrogel studied by ^1H molecular diffusion NMR and ^(19)F spin diffusion NMR

R_f-PEG (fluoroalkyl double-ended poly(ethylene glycol)) hydrogel is potentially useful as a drug delivery depot due to its advanced properties of sol–gel two-phase coexistence and low surface erosion. In this study, ^1H molecular diffusion nuclear magnetic resonance (NMR) and ^(19)F spin diffusion NMR were used to probe the drug loading and diffusion properties of the R_f-PEG hydrogel for small anticancer drugs, 5-fluorouracil (FU) and its hydrophobic analog, 1,3-dimethyl-5-fluorouracil (DMFU). It was found that FU has a larger apparent diffusion coefficient than that of DMFU, and the diffusion of the latter was more hindered. The result of ^(19)F spin diffusion NMR for the corresponding freeze-dried samples indicates that a larger portion of DMFU resided in the R_f core/IPDU intermediate-layer region (where IPDU refers to isophorone diurethane, as a linker to interconnect the R_f group and the PEG chain) than that of FU while the opposite is true in the PEG–water phase. To understand the experimental data, a diffusion model was proposed to include: (1) hindered diffusion of the drug molecules in the R_f core/IPDU-intermediate-layer region; (2) relatively free diffusion of the drug molecules in the PEG-water phase (or region); and (3) diffusive exchange of the probe molecules between the above two regions. This study also shows that molecular diffusion NMR combined with spin diffusion NMR is useful in studying the drug loading and diffusion properties in hydrogels for the purpose of drug delivery applications

Premenopausal endocrine-responsive early breast cancer: who receives chemotherapy?

Background: The role of chemotherapy in addition to combined endocrine therapy for premenopausal women with endocrine-responsive early breast cancer remains an open question, yet trials designed to answer it have repeatedly failed to adequately accrue. The International Breast Cancer Study Group initiated two concurrent trials in this population: in Premenopausal Endocrine Responsive Chemotherapy (PERCHE), chemotherapy use is determined by randomization and in Tamoxifen and Exemestane Trial (TEXT) by physician choice. PERCHE closed with inadequate accrual; TEXT accrued rapidly. Methods: From 2003 to 2006, 1317 patients (890 with baseline data) were randomly assigned to receive ovarian function suppression (OFS) plus tamoxifen or OFS plus exemestane for 5 years in TEXT. We explore patient-related factors according to whether or not chemotherapy was given using descriptive statistics and classification and regression trees. Results: Adjuvant chemotherapy was chosen for 64% of patients. Lymph node status was the predominant determinant of chemotherapy use (88% of node positive treated versus 46% of node negative). Geography, patient age, tumor size and grade were also determinants, but degree of receptor positivity and human epidermal growth factor receptor 2 status were not. Conclusions: The perceived estimation of increased risk of relapse is the primary determinant for using chemotherapy despite uncertainties regarding the degree of benefit it offers when added to combined endocrine therapy in this populatio

Probing CP Violation with the Deuteron Electric Dipole Moment

We present an analysis of the electric dipole moment (EDM) of the deuteron as induced by CP-violating operators of dimension 4, 5 and 6 including theta QCD, the EDMs and color EDMs of quarks, four-quark interactions and the Weinberg operator. We demonstrate that the precision goal of the EDM Collaboration's proposal to search for the deuteron EDM, (1-3)\times 10^{-27} e cm, will provide an improvement in sensitivity to these sources of one-two orders of magnitude relative to the existing bounds. We consider in detail the level to which CP-odd phases can be probed within the MSSM.Comment: 5 pages, 4 figures; precision estimates clarified, to appear in Phys. Rev.