Suchergebnisse

The system dynamics applied in this research on modeling a tourist destination (area) life cycle (TALC) contributes to understanding its behavior and the way that information feedback governs the use of feedback loops, delays and stocks and flows. On this basis, a system dynamic three-staged TALC model is conceptualized, with the number of visitors V as an indicator of the carrying capacities' dynamics and the flow function V(t) to determine the TALC stages. In the first supply-dominance stage, the model indicated that arrivals are growing until the point of inflexion. After this point, arrivals continue growing (but with diminishing growth rates), indicating the beginning of the demand-dominance stage, ending up with the saturation point, i.e., the maximum number of visitors. The simulated TALC system dynamics model was then applied to five EU destinations (Living Labs) to explain their development along the observed period (2007–2019). The analysis revealed that all observed Living Labs reached the second lifecycle stage, with one entered as early as in 2015 and another in 2018. Lifecycle stage durations may significantly differ across the destinations, as do the policies used either to prevent stagnation or to restructure the offer to become more sustainable and resilient.

The talc industry and Food and Drug Administration (FDA) have asserted that talc has been asbestos-free since 1976 when the industry created a voluntary specification for the asbestos content of cosmetic talc. However, recent evidence reveals that cosmetic talc is not and never was asbestos-free. This narrative review examines the talc industry's role in delaying and ultimately blocking federal regulation of cosmetic talc from the 1970s to today. We review primary source material, including corporate documents released in recent litigation and FDA documents released in response to Freedom of Information Act requests. Our results indicate that the talc industry exerted considerable influence over three key areas: regulatory proceedings at the FDA; testing methods and the manipulation of test results (including undisclosed results); and press coverage and the medical literature. The talc companies' actions and FDA indifference have had a lasting effect on consumer health, including the regulation of talc by other government agencies.

The recent lawsuits against Johnson & Johnson have raised the issue of what and when talcum powder manufacturers knew about the presence of asbestos in their products and what they did or did not do to protect the public. Low-level exposure to asbestos in talc is said to result in either mesothelioma or ovarian cancer. Johnson & Johnson has claimed that there was "no detectable asbestos" in their products and that any possible incidental presence was too small to act as a carcinogen. But what exactly does "nondetected" mean? Here, we examine the historical development of the argument that asbestos in talcum powder was "nondetected." We use a unique set of historical documents from the early 1970s, when low-level pollution of talc with asbestos consumed the cosmetics industry. We trace the debate over the Food and Drug Administration's efforts to guarantee that talc was up to 99.99% free of chrysotile and 99.9% free of amphibole asbestos. Cosmetic talc powder manufacturers, through their trade association, pressed for a less stringent methodology and adopted the term "nondetected" rather than "asbestos-free" as a term of art.

Natural silicates are potential sources of divalent cations, which are necessary for the mineralization of CO2 in the form of carbonates. The kinetics study of the natural talc dissolution was carried out in flow-through reactors at 25 °C in the presence and absence of organic ligands — oxalate and citrate, at pH 3. Increasing of the rate of talc dissolution in the presence of citrate and oxalate, approximately 3–4 times, is typical only for the initial stage of mineral dissolution. The steady-state dissolution rates of talc were established approximately 30–40 hours after the beginning of the experiment and were equal to 3E–10–16 mol/cm2s.

In this research prepared Epoxy – Talc powder composites with weight ratio of Talc powder (0,5,10,15,20,25)% . The value of thermal conductivity increase with increasing ratio of talc powder and water absorption increase with increasing ratio of talc powder because the structure from magnesium silicate hydroxide and hydrophilic nature .Ethanol absorption decrease with increasing percentage talc powder compared with epoxy pure

As required by Art. 29 of the Grant Agreement, each beneficiary must – as soon as possible – disseminate its results by disclosing them to the public by appropriate means (other than those resulting from protecting or exploiting the results), including in scientific publications (in any medium). As part of this obligation, within the SmartCulTour-project, multiple deliverables have been foreseen across work packages, to focus on an open access publication strategy. This deliverable provides metadata and abstracts of the publications residing under Work Package 4: "Assessing the impacts of cultural tourism". Deliverable 4.3 aimed to provide "A minimum of 3 academic papers on sustainable cultural tourism, resilience, and the TALC model" and therefore focuses on sustainable cultural tourism indicators, the link between cultural tourism development, sustainability and resilience, and the integration of cultural tourism, sustainability/resilience, and the tourism area life cycle. The full papers are available in open access and can be found by following the DOI links provided. The deliverable is a living document that, after initial submission, can be updated in case of additional scientific publications within the scope of Work Package 4.