42 research outputs found

    Multi-Method Framework for Development of Systemic, Technology-Driven Capability Concepts

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    Emerging technologies shape the operations of many commercial and military organisations, including the Australian Defence Force. Current capability development processes, grounded in the principles of systems engineering, focus on capability gaps rather than opportunities, often locking in incremental improvements but not transformative changes enabling new capabilities and processes. Furthermore, traditional systems engineering is framed in a way that equates capability with product, leading to single-technology stove-piped processes. By contrast, the study presented in this thesis seeks to design a methodological framework for development of systemic, technology-driven capability concepts that recognise capability as an emergent property of complex systems. The study draws on the body of knowledge in systems thinking and multi-method operations research to design the methodological framework and apply, evaluate and refine it across five concept development workshops within a multi-case study. The study findings support reducing the focus on current processes, use of boundary-mitigating steps to improve generation of ideas, and evolution of technology use cases during concept development. Higher-level, operational concepts are found to be more complex than lower-level tactical concepts; cyclical processes that include resupply produce concepts with higher dynamic complexity. Elicitation of impacts is shaped by the available time and discussion prompts. Importantly, concepts are best framed in terms of capability rather than technology, as capabilities are enabled by multiple interacting technological elements. This is reflected in the novel formalism of technological ecosystem maps, which reframes the discussion of capability options towards capability effects generated by technology groupings. For operations researchers seeking to design real-life interventions, the study demonstrates a traceable process of methodological evolution, with a novel application of boundary critique as the analytical lens for improvement. For capability developers, the study provides a fit-for-purpose methodology for exploring the opportunities presented by emerging technologies, intended to complement the existing capability development processes. The formalism of technological ecosystems lays the groundwork for reframing of capability development towards a more holistic framework, emphasising integration, sustainment, and long-term management of capability elements

    Association between antiarrhythmic, electrophysiological and antioxidative effects of melatonin in ischemia/reperfusion

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    Melatonin is assumed to confer cardioprotective action via antioxidative properties. We evaluated the association between ventricular tachycardia and/or ventricular fibrillation (VT/VF) incidence, oxidative stress, and myocardial electrophysiological parameters in experimental ischemia/reperfusion under melatonin treatment. Melatonin was given to 28 rats (10 mg/kg/day, orally, for 7 days) and 13 animals received placebo. In the anesthetized animals, coronary occlusion was induced for 5 min followed by reperfusion with recording of unipolar electrograms from ventricular epicardium with a 64-lead array. Effects of melatonin on transmembrane potentials were studied in ventricular preparations of 7 rats in normal and ?ischemic? conditions. Melatonin treatment was associated with lower VT/VF incidence at reperfusion, shorter baseline activation times (ATs), and activation-repolarization intervals and more complete recovery of repolarization times (RTs) at reperfusion (less baseline-reperfusion difference, ΔRT) (p < 0.05). Superoxide dismutase (SOD) activity was higher in the treated animals and associated with ΔRT (p = 0.001), whereas VT/VF incidence was associated with baseline ATs (p = 0.020). In vitro, melatonin led to a more complete restoration of action potential durations and resting membrane potentials at reoxygenation (p < 0.05). Thus, the antioxidative properties of melatonin were associated with its influence on repolarization duration, whereas the melatonin-related antiarrhythmic effect was associated with its oxidative stress-independent action on ventricular activation.Fil: Sedova, Ksenia A.. Czech Technical University In Prague; República ChecaFil: Bernikova, Olesya G.. Ural Branch of Russian Academy of Sciences; RusiaFil: Cuprova, Julia I.. Czech Technical University In Prague; República ChecaFil: Ivanova, Alexandra D.. Lomonosov Moscow State University; RusiaFil: Kutaeva, Galina A.. Pitirim Sorokin Syktyvkar State University; RusiaFil: Pliss, Michael G.. Almazov National Medical Research Centre; RusiaFil: Lopatina, Ekaterina V.. University of Saint Petersburg; RusiaFil: Vaykshnorayte, Marina A.. Ural Branch Of Russian Academy Of Sciences; RusiaFil: Diez, Emiliano Raúl. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Medicas. Instituto de Fisiologia; ArgentinaFil: Azarov, Jan E.. Ural Branch of Russian Academy of Sciences; Rusia. Pitirim Sorokin Syktyvkar State University; Rusi

    Identification of key small non-coding MicroRNAs controlling pacemaker mechanisms in the human sinus node

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    BACKGROUND: The sinus node (SN) is the primary pacemaker of the heart. SN myocytes possess distinctive action potential morphology with spontaneous diastolic depolarization because of a unique expression of ion channels and Ca2+-handling proteins. MicroRNAs (miRs) inhibit gene expression. The role of miRs in controlling the expression of genes responsible for human SN pacemaking and conduction has not been explored. The aim of this study was to determine miR expression profile of the human SN as compared with that of non-pacemaker atrial muscle. METHODS AND RESULTS: SN and atrial muscle biopsies were obtained from donor or post-mortem hearts (n=10), histology/ immunolabeling were used to characterize the tissues, TaqMan Human MicroRNA Arrays were used to measure 754 miRs, Ingenuity Pathway Analysis was used to identify miRs controlling SN pacemaker gene expression. Eighteen miRs were significantly more and 48 significantly less abundant in the SN than atrial muscle. The most interesting miR was miR-486-3p predicted to inhibit expression of pacemaking channels: HCN1 (hyperpolarization-activated cyclic nucleotide-gated 1), HCN4, voltage-gated calcium channel (Cav )1.3, and Cav 3.1. A luciferase reporter gene assay confirmed that miR-486-3p can control HCN4 expression via its 3′ untranslated region. In ex vivo SN preparations, transfection with miR-486-3p reduced the beating rate by ≈35±5% (P<0.05) and HCN4 expression (P<0.05). CONCLUSIONS: The human SN possesses a unique pattern of expression of miRs predicted to target functionally important genes. miR-486-3p has an important role in SN pacemaker activity by targeting HCN4, making it a potential target for therapeutic treatment of SN disease such as sinus tachycardia.</p

    Phenological shifts of abiotic events, producers and consumers across a continent

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    Ongoing climate change can shift organism phenology in ways that vary depending on species, habitats and climate factors studied. To probe for large-scale patterns in associated phenological change, we use 70,709 observations from six decades of systematic monitoring across the former Union of Soviet Socialist Republics. Among 110 phenological events related to plants, birds, insects, amphibians and fungi, we find a mosaic of change, defying simple predictions of earlier springs, later autumns and stronger changes at higher latitudes and elevations. Site mean temperature emerged as a strong predictor of local phenology, but the magnitude and direction of change varied with trophic level and the relative timing of an event. Beyond temperature-associated variation, we uncover high variation among both sites and years, with some sites being characterized by disproportionately long seasons and others by short ones. Our findings emphasize concerns regarding ecosystem integrity and highlight the difficulty of predicting climate change outcomes. The authors use systematic monitoring across the former USSR to investigate phenological changes across taxa. The long-term mean temperature of a site emerged as a strong predictor of phenological change, with further imprints of trophic level, event timing, site, year and biotic interactions.Peer reviewe

    Chronicles of nature calendar, a long-term and large-scale multitaxon database on phenology

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    We present an extensive, large-scale, long-term and multitaxon database on phenological and climatic variation, involving 506,186 observation dates acquired in 471 localities in Russian Federation, Ukraine, Uzbekistan, Belarus and Kyrgyzstan. The data cover the period 1890-2018, with 96% of the data being from 1960 onwards. The database is rich in plants, birds and climatic events, but also includes insects, amphibians, reptiles and fungi. The database includes multiple events per species, such as the onset days of leaf unfolding and leaf fall for plants, and the days for first spring and last autumn occurrences for birds. The data were acquired using standardized methods by permanent staff of national parks and nature reserves (87% of the data) and members of a phenological observation network (13% of the data). The database is valuable for exploring how species respond in their phenology to climate change. Large-scale analyses of spatial variation in phenological response can help to better predict the consequences of species and community responses to climate change.Peer reviewe

    Vermittlung mehrsprachiger Literatur, Theorie und Praxis

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    Ksenia IvanovaAlpen Adria Universität Klagenfurt, Masterarbeit, 2016(VLID)241005

    TEACHING ESP FOR STUDENTS WITH DIVERSE LANGUAGE BACKGROUNDS IN NON-LINGUISTIC UNIVERSITY

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    The present study is based on the fact that nowadays the sphere of education is constantly developing. The clear majority of universities all over the world tend to provide their students with higher education that will be recognised globally. There is a wide range of universities in Russia that follow this trend. Institutions of higher education are designed for students with diverse language backgrounds among them there are universities that focus on teaching students with a different ethnic and linguistic origin. RUDN University is the only university in Russia that educates students from around 150 countries. That is why it is necessary to identify strategies of teaching foreign languages for students who belong to various language groups. Our research relies on the observation of students majoring in economics. The relevance of the topic is due to the fact that today economics is still one of the most prospective and sought-after fields of study in Russia. Therefore, our research is aimed at identifying the most common and efficient methods of teaching foreign languages to multicultural, international students and native speakers of the Russian language majoring in economics. The purpose of the given research is to distinguish how the belonging to different language groups influences the choice of methods that are used by a lecturer during the education process. Special attention is paid to the analysis of activities that are used during the foreign language lessons for students majoring in economics such as rendering, translation, case studies, lessons with native speakers to identify the most useful and helpful means of teaching and learning of specialised language. Besides, the present article includes the results of the survey and comparative analysis conducted among the students learning economic English to identify which of these methods are more required in groups of multicultural students and in groups of native speakers. The present research classifies the existing data and methods of teaching foreign languages for students majoring in economics and suggests methods that are frequently used in non-linguistic universities in groups of students with diverse language backgrounds
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