Social video: A collaborative video annotation environment to support E-learning

Our social video system allows users to enrich video by additional information like external websites, hypertext, images, other videos, or communication channels. Users are able to annotate whole videos, scenes, and objects in the video. We do not focus on a single user accessing the system but on multiple users watching the video and accessing the annotations others have created. Our web-based prototype differs from classical hypervideo systems because it allows annotation (authoring) and navigation in videos by focusing on collaboration and communication between the users. The prototype is integrated into the online social network Facebook and was evaluated with more than 300 users. The evaluation analyzes the usage of the system with a learning scenario in mind and indicates a learning success of users

A metformin hatása a vérzsírértékekre, illetve a szív és érrendszeri kockázatra sztatinkezelésben nem részesülő 2-es típusú cukorbetegekben = The effect of metformin on lipid parameters and on cardiovascular risk in patients with type 2 diabetes without statin therapy

Absztrakt: Bevezetés: Számos vizsgálat és metaanalízis alátámasztotta a metforminkezelés pozitív hatását a lipidparaméterekre, ugyanakkor a metforminkezelés cardiovascularis rizikóra gyakorolt hatása továbbra sem tisztázott. Célkitűzés: Vizsgálatunk célja a metforminkezelés hatásának vizsgálata a lipidparaméterekre és a cardiovascularis rizikóra 2-es típusú cukorbetegekben. Módszer: Egy monocentrikus, keresztmetszeti vizsgálat keretében 102, antilipaemiás kezelésben nem részesülő, 2-es típusú cukorbeteg adatait dolgoztuk fel a szérum-lipidparaméterek és a cardiovascularis rizikó tekintetében (a United Kingdom Prospective Diabetes Study rizikókalkulátor alapján). A betegeket két csoportra osztottuk, metformint szedőkre (n = 52) és metforminterápiában nem részesülőkre (n = 50). Eredmények: A metforminkezelésben részesülő betegek esetében a glikémiás paraméterektől függetlenül szignifikánsan alacsonyabb össz- és LDL-koleszterin-szinteket találtunk (p<0,01, illetve p<0,05). A szisztolés vérnyomás, a HDL-koleszterin- és a trigliceridszintek, valamint a több paramétert vizsgáló, kockázatbecslő számítás alapján a szív-ér rendszeri kockázat tekintetében nem találtunk érdemi eltérést a két betegcsoport között. Következtetés: Vizsgálatunk megerősíti a metforminkezelés koleszterin- és LDL-koleszterin-szintekre gyakorolt pozitív hatását a cardiovascularis rizikó csökkentése nélkül. Orv Hetil. 2019; 160(34): 1346–1352. | Abstract: Introduction: Some meta-analyses suggested a positive effect of metformin therapy on lipid parameters, but the potential beneficial effect of metformin on cardiovascular risk in type 2 diabetes is not entirely clear. Aim: We investigated the effect of metformin therapy on lipid parameters and cardiovascular risk in patients with type 2 diabetes. Method: In a cross-sectional, monocentric study, 102 patients with type 2 diabetes without lipid-lowering medication were analysed for lipid profile and cardiovascular risk (United Kingdom Prospective Diabetes Study Risk Calculator) depending on metformin therapy. The patients were divided into two subgroups regarding with (n = 52) or without metformin therapy (n = 50). Results: Patients with metformin therapy had significantly lower total cholesterol and LDL cholesterol levels than patients without metformin (p<0.01 and p<0.05). This effect was independent from glucose control. No intrinsic effect of metformin could be found on systolic blood pressure, HDL cholesterol, triglycerides, and long-term cardiovascular risk using a multivariable risk assessment score. Conclusion: Metformin therapy has beneficial effects on cholesterol levels without improving cardiovascular risk in patients with type 2 diabetes. Orv Hetil. 2019; 160(34): 1346–1352

Epigenetic Regulation of S100A9 and S100A12 Expression in Monocyte-Macrophage System in Hyperglycemic Conditions

The number of diabetic patients in Europe and world-wide is growing. Diabetes confers a 2-fold higher risk for vascular disease. Lack of insulin production (Type 1 diabetes, T1D) or lack of insulin responsiveness (Type 2 diabetes, T2D) causes systemic metabolic changes such as hyperglycemia (HG) which contribute to the pathology of diabetes. Monocytes and macrophages are key innate immune cells that control inflammatory reactions associated with diabetic vascular complications. Inflammatory programming of macrophages is regulated and maintained by epigenetic mechanisms, in particular histone modifications. The aim of our study was to identify the epigenetic mechanisms involved in the hyperglycemia-mediated macrophage activation. Using Affymetrix microarray profiling and RT-qPCR we identified that hyperglycemia increased the expression of S100A9 and S100A12 in primary human macrophages. Expression of S100A12 was sustained after glucose levels were normalized. Glucose augmented the response of macrophages to Toll-like receptor (TLR)-ligands Palmatic acid (PA) and Lipopolysaccharide (LPS) i.e., pro-inflammatory stimulation. The abundance of activating histone Histone 3 Lysine 4 methylation marks (H3K4me1, H3K4me3) and general acetylation on histone 3 (AceH3) with the promoters of these genes was analyzed by chromatin immunoprecipitation. Hyperglycemia increased acetylation of histones bound to the promoters of S100A9 and S100A12 in M1 macrophages. In contrast, hyperglycemia caused a reduction in total H3 which correlated with the increased expression of both S100 genes. The inhibition of histone methyltransferases SET domain-containing protein (SET)7/9 and SET and MYND domain-containing protein (SMYD)3 showed that these specifically regulated S100A12 expression. We conclude that hyperglycemia upregulates expression of S100A9, S100A12 via epigenetic regulation and induces an activating histone code on the respective gene promoters in M1 macrophages. Mechanistically, this regulation relies on action of histone methyltransferases SMYD3 and SET7/9. The results define an important role for epigenetic regulation in macrophage mediated inflammation in diabetic conditions

The importance of nuclear RAGE-Mcm2 axis in diabetes or cancer-associated replication stress

An elevated frequency of DNA replication defects is associated with diabetes and cancer. However, data linking these nuclear perturbations to the onset or progression of organ complications remained unexplored. Here, we report that RAGE (Receptor for Advanced Glycated Endproducts), previously believed to be an extracellular receptor, upon metabolic stress localizes to the damaged forks. There it interacts and stabilizes the minichromosome-maintenance (Mcm2-7) complex. Accordingly, RAGE deficiency leads to slowed fork progression, premature fork collapse, hypersensitivity to replication stress agents and reduction of viability, which was reversed by the reconstitution of RAGE. This was marked by the 53BP1/OPT-domain expression and the presence of micronuclei, premature loss-of-ciliated zones, increased incidences of tubular-karyomegaly, and finally, interstitial fibrosis. More importantly, the RAGE-Mcm2 axis was selectively compromised in cells expressing micronuclei in human biopsies and mouse models of diabetic nephropathy and cancer. Thus, the functional RAGE-Mcm2/7 axis is critical in handling replication stress in vitro and human disease

Analyse, Bewertung und Sicherung alpiner Freiräume durch Raumordnung und räumliche Planung

Alpine Freiräume werden zusehends knapper. Diese Aussage gilt in den Alpen für den naturgemäß raren Dauersiedlungsraum, der z.B. in Tirol nur 11,8 % des Staatsgebietes umfasst. Die Bevölkerung wächst in vielen Talschaften und damit auch die erforderliche Infrastruktur. Aber auch die Freiräume, die in den darüber gelegenen Höhenstufen der Alpen liegen, werden sukzessiv zerschnitten und mit technischen Anlagen (z.B. Seilbahnen, hydroelektrischen Anlagen) bzw. immer intensiveren Nutzungen (z.B. EMountainbikes) erschlossen. Im Freistaat Bayern begann die alpenweite Erhaltung von Freiräumen mit der Implementierung des Alpenplans als raumordnerische Zielsetzung bereits im Jahr 1972. Die dadurch betriebene Zonierung des gesamten bayerischen Alpenraums nach drei Intensitätsstufen der verkehrlichen Nutzung war eine echte Innovation des Normgebers. Sie zielte mit ihrer sogenannten Zone C auf den damals noch jungen Naturschutz und die Verringerung alpiner Naturgefahren ab. In der Hauptsache jedoch galt diese planerische Initiative der nicht anlagengebundenen, landschaftsbezogenen Erholung, das heißt Freizeit- und Tourismusaktivitäten in der Natur. Heute bestehen mehr oder weniger erfolgreiche, verwandte Initiativen in allen deutschsprachigen Alpenstaaten und der Schweiz. Sie zu analysieren, ihre Festlegung, Funktionsweise und planerische Umsetzung vergleichend zu beschreiben sowie kritisch zu hinterfragen ist die Zielsetzung dieser Arbeit. Weil der Erhalt von Freiräumen ein transnationales Thema darstellt, gerade in den vielfach von politischen Grenzen durchzogenen Alpen, wird dabei auch auf die rahmensetzenden Vorgaben der völkerrechtlich verbindlichen Alpenkonvention aus dem Jahr 1991 abgehoben und die neue EU-Initiative EUSALP sowie deren potenzielle Auswirkungen erörtert. Im Fokus steht aber die Zusammenführung von Ansätzen zum Erhalt von Freiräumen für den Menschen (Einheimische und ihre traditionellen Wirtschaftsweisen, aber auch Besucher) und das Naturerbe. Die heute gängigen Praktiken im Umgang mit alpinen Freiräumen in Raumordnung und räumlicher Planung im deutschsprachigen Alpenraum und der Schweiz werden aufgezeigt sowie kritisch bewertet. Zudem werden künftige Möglichkeiten von grenzüberschreitenden harmonisierten Verfahrensweisen debattiert.The analysis, evaluation and safeguarding of Alpine open spaces through regional and spatial planning Alpine open spaces are becoming noticeably scarcer. This statement applies to the inherently restricted area of permanent settlement in the Alps, which, e.g., covers only 11.8 % of the territory of the Tyrol. The population is growing in many of the valleys and with it the infrastructure required. However, the open spaces, situated at altitudes above the settlements, are also being successively broken up and exploited using technical equipment (e.g. cable cars, hydro-electric facilities) or increasingly intensive types of use (e.g. e-mountain bikes). In Bavaria the conservation of open space began as early as 1972 with the implementation of the Alpine plan (Alpenplan), which set spatial planning objectives for the entire Alpine area. This led to the division of the Bavarian Alpine area into three zones of varying intensity of traffic use, a true legislative innovation. The so-called Zone C was intended for nature protection, still in its infancy at that time, and also aimed to reduce natural Alpine hazards. Primarily, however, this planning initiative was related to the role of the landscape for recreation, i. e. to leisure and touristic activities in natural surroundings. Today, there are similar initiatives of varying success in all the Germanspeaking Alpine states and in Switzerland. This paper aims to analyse these initiatives, comparing and critically assessing their stipulation, functioning and planning implementation. As the conservation of open space is a transnational issue, especially in the Alps, which are dissected by many political borders, reference is also made to the framework provisions of the internationally binding Alpine Convention from 1991 and to the new EU initiative EUSALP, and their potential consequences. The focus of attention is, however, on bringing together approaches for conserving open space for people (local inhabitants and their traditional economic activities, but also visitors) and natural heritage. Presentday regional and spatial planning practices related to Alpine open spaces in the Germanspeaking Alps and in Switzerland are presented and critically evaluated and future options for harmonising approaches across the borders are discussed

Interleukin-6 Is a Potential Biomarker for Severe Pandemic H1N1 Influenza A Infection

Pandemic H1N1 influenza A (H1N1pdm) is currently a dominant circulating influenza strain worldwide. Severe cases of H1N1pdm infection are characterized by prolonged activation of the immune response, yet the specific role of inflammatory mediators in disease is poorly understood. The inflammatory cytokine IL-6 has been implicated in both seasonal and severe pandemic H1N1 influenza A (H1N1pdm) infection. Here, we investigated the role of IL-6 in severe H1N1pdm infection. We found IL-6 to be an important feature of the host response in both humans and mice infected with H1N1pdm. Elevated levels of IL-6 were associated with severe disease in patients hospitalized with H1N1pdm infection. Notably, serum IL-6 levels associated strongly with the requirement of critical care admission and were predictive of fatal outcome. In C57BL/6J, BALB/cJ, and B6129SF2/J mice, infection with A/Mexico/4108/2009 (H1N1pdm) consistently triggered severe disease and increased IL-6 levels in both lung and serum. Furthermore, in our lethal C57BL/6J mouse model of H1N1pdm infection, global gene expression analysis indicated a pronounced IL-6 associated inflammatory response. Subsequently, we examined disease and outcome in IL-6 deficient mice infected with H1N1pdm. No significant differences in survival, weight loss, viral load, or pathology were observed between IL-6 deficient and wild-type mice following infection. Taken together, our findings suggest IL-6 may be a potential disease severity biomarker, but may not be a suitable therapeutic target in cases of severe H1N1pdm infection due to our mouse data

DMFC as Battery-Extender in solar-boat application

For special applications Direct Methanol Fuel Cells (DMFC) are close to commercial application or already commercialized today. However for the step from laboratory to a broader market of fuel cells, a significant cost reduction, as well as a lifetime and power density improvement of the systems is needed. The Goals of the BZ-BattExt Project should be reached by applying new knowledge in alternative materials, improved operation strategies and enhanced sub systems. In the project a 100 W DMFC compact system as battery extender was successfully developed and operated. The reduction of the number of components and the simplification of the system led to a high reduction in price, weight and volume. The feasibility of a micro-DMFC system was evaluated which enables a minimised system periphery due to an improved System Architecture. For this, alternative materials and functional components were developed and investigated leading to new membranes with reduced water and methanol permeation allowing a low air stoich operation and higher system efficiency. Gas diffusion layers of various compositions were tested and optimised materials were selected. New sealing materials with good methanol stability and optimized processibility in commercial production Processes were developed and the MEA preparation was adapted to the new materials. The use of a simple, cost-effective way of stack production was demonstrated for DMFC use. Using this new components and materials, coupled with the enhanced subsystem architectures and enhanced operation strategies, the build up and start-up of an improved micro DMFC System was achieved. The technical feasibility of the Results was investigated in the real application. The micro DMFC System was used as a battery range extender in a 6m solar boat. The DMFC fuel cell system serves as a basis for an efficient, compact and cost effective alternative for battery- or battery-extender systems and can fulfil a broad variety of applications