217 research outputs found

    Omnichannel – die Luxusmodebranche vor der Herausforderung zwischen Haptik und Technologie

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    Die Luxusmodebranche befindet sich im Umbruch. Digitale Technologien und der zunehmende Onlinekonsum von Luxusgütern erhöhen den Druck auf die bestehenden Geschäftsmodelle von Modehäusern. Das veränderte Konsumverhalten der Gesellschaft zwingt Unternehmen, ihre stationären Boutiquen mit zusätzlichen Verkaufs- und Kommunikationskanälen zu erweitern. Insbesondere die technologieaffine Generation der Millennials verlangt bei ihren Einkäufen nach mehr Freiheit und Interaktion. Die Schnittstelle zwischen Haptik und Technologie rückt dadurch immer mehr in den Mittelpunkt des Geschehens. In nahe gelegener Zukunft könnte es in der sonst von Traditionen geprägten Luxusgüterindustrie zu einem Paradigmenwechsel kommen. Noch aber beweisen viele Unternehmen aufgrund der enormen Komplexität von digitalen Geschäftsmodellen grosse Zurückhaltung. Das Ziel dieser Arbeit ist, die Herausforderungen von digitalen Geschäftsmodellen, im Spezifischen von Omnichannel-Strategien, in der high-end Modebranche zu ergründen und diese nach Relevanz zu klassieren. Anhand der identifizierten Hindernisse werden praktische Handlungsempfehlungen abgeleitet, die das Management im Vorfeld einer digitalen Transformation Rat gebend unterstützen und Transparenz über sich stellende Schwierigkeiten verschaffen

    Permanent safety measures (MISP): efficacy assessment through pumping test analysis, groundwater flow modeling and environmental isotope investigation

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    Heavy contaminated areas, Permanent Safety Measures, environmental isotopes, pumping tests, modelling

    Elevated 8-isoprostane levels in basal cell carcinoma and in UVA irradiated skin.

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    Isoprostanes are prostaglandin isomers produced from the peroxidation of polyunsaturated fatty acids from the cellular membrane. They have been used as a specific index of cellular lipoperoxidation and as an indirect measure of oxidative stress. However, these molecules also present several biological activities. An oxidative environment measured as the presence of other indirect measurements of reactive oxygen species lipoperoxidation has recently been described in basal cell carcinoma, the most frequent type of non-melanoma skin cancer. This study aims to measure the levels of 8-isoprostaglandin F2α, an isoprostane widely studied in other models as a by-product of ROS-induced lipid peroxidation, in basal cell carcinoma and in UVA irradiated healthy skin. We found that 8-iso-PGF2α is present in higher levels in BCC specimens compared to healthy non sun-exposed skin, confirming previous studies on the production of lipoperoxidation in this tumor. Moreover, we demonstrated that topical pre-treatment with a compound containing vitamin E is capable of reducing 8-iso-PGF2α formation in UV irradiated skin suggesting a role for isoprostanes in UV induced inflammation and eventually carcinogenesis and confirming the function of vitamin E as an antioxidant in this model

    The longevity of broadleaf deciduous trees in Northern Hemisphere temperate forests: insights from tree-ring series

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    Understanding the factors controlling the expression of longevity in trees is still an outstanding challenge for tree biologists and forest ecologists. We gathered tree-ring data and literature for broadleaf deciduous (BD) temperate trees growing in closed-canopy old-growth (OG) forests in the Northern Hemisphere to explore the role of geographic patterns, climate variability, and growth rates on longevity. Our pan-continental analysis, covering 25 species from 12 genera, showed that 300–400 years can be considered a baseline threshold for maximum tree lifespan in many temperate deciduous forests. Maximum age varies greatly in relation to environmental features, even within the same species. Tree longevity is generally promoted by reduced growth rates across large genetic differences and environmental gradients. We argue that slower growth rates, and the associated smaller size, provide trees with an advantage against biotic and abiotic disturbance agents, supporting the idea that size, not age, is the main constraint to tree longevity. The oldest trees were living most of their life in subordinate canopy conditions and/or within primary forests in cool temperate environments and outside major storm tracks. Very old trees are thus characterized by slow growth and often live in forests with harsh site conditions and infrequent disturbance events that kill much of the trees. Temperature inversely controls the expression of longevity in mesophilous species (Fagus spp.), but its role in Quercus spp. is more complex and warrants further research in disturbance ecology. Biological, ecological, and historical drivers must be considered to understand the constraints imposed to longevity within different forest landscapes

    Effects of metformin on clinical outcome in diabetic patients with advanced HCC receiving sorafenib

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    Background and objective: Several studies have reported an association between type 2 diabetes mellitus and hepatocellular carcinoma (HCC). Data from several retrospective studies and meta-analyses have highlighted a reduction of about 50% in the risk of developing HCC in cirrhotic patients treated with metformin for diabetes. The aim of this study was to evaluate the different outcomes of patients who received or did not receive metformin during treatment with sorafenib.Methods: We analyzed 93 patients consecutively treated with sorafenib. Forty-two (45.2%) patients were diabetic, of whom 31 were on metformin. Progression-free survival (PFS) and overall survival (OS) were estimated with the Kaplan-Meier method and compared with the log-rank test.Results: The concomitant use of sorafenib and metformin was associated with a median PFS of 2.6 months (95% CI 1.9-3.3) compared to 5.0 months (95% CI 2.5-8.2) for patients receiving sorafenib alone (p = 0.029). The median OS of patients treated with the combination was 10.4 months (95% CI 3.9-14.4) compared to 15.1 months (95% CI 11.7-17.8) for those who were not given metformin (p = 0.014).Conclusions: Our findings could be the result of increased tumor aggressiveness and resistance to sorafenib in metformin-treated patients

    A soil fungus confers plant resistance against a phytophagous insect by disrupting the symbiotic role of its gut microbiota

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    Plants generate energy flows through natural food webs, driven by competition for resources among organisms, which are part of a complex network of multitrophic interactions. Here, we demonstrate that the interaction between tomato plants and a phytophagous insect is driven by a hidden interplay between their respective microbiotas. Tomato plants colonized by the soil fungus Trichoderma afroharzianum, a beneficial microorganism widely used in agriculture as a biocontrol agent, negatively affects the development and survival of the lepidopteran pest Spodoptera littoralis by altering the larval gut microbiota and its nutritional support to the host. Indeed, experiments aimed to restore the functional microbial community in the gut allow a complete rescue. Our results shed light on a novel role played by a soil microorganism in the modulation of plant-insect interaction, setting the stage for a more comprehensive analysis of the impact that biocontrol agents may have on ecological sustainability of agricultural systems
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