3,534 research outputs found
About twin primes and distribution of primes
No full textThis paper give us a demonstration of twin primes conjecture using approximation of function �(iupsilon) that we introduce in section 6. Section 1-5 give us introduction to terminology and a clarification on (iupsilon) terms. In particular section
5 is really important because of its Lemma. Section 7 reassume foregoing explanations and it give us two theorems and one corollary;the theorem 7.2 give us exact approximation of twin primes counting function
Delayed winter warming: A robust decadal response to strong tropical volcanic eruptions?
No full textClimate simulations suggest that strong tropical volcaniceruptions (SVEs) induce decadal dynamical responses in thecoupled ocean‐atmosphere system, which protract theclimate recovery beyond the short‐lived radiative forcing.Here, for the first time, we diagnose the signature of suchresponses in European seasonal climate reconstructions overthe past 500 years. The signature consists of a decadal‐scalepositive phase of the winter North Atlantic Oscillationaccompanied by winter warming over Europe peakingapproximately one decade after a major eruption. Thereconstructed delayed winter warming is compatible withformerly suggested mechanisms behind simulated SVE‐driven climate responses, thus corroborating the existence ofSVE‐driven decadal climate variability. Historical climate‐state uncertainty may, however, hamper unambiguousstatistical and dynamical assessments both for multiple andfor individual SVEs. Citation: Zanchettin Davide, TimmreckClaudia, Bothe Oliver, Lorenz Stephan J., Hegerl Gabriele, GrafHans‐F., Luterbacher Jürg, Jungclaus Johann H., (2012), Delayedwinter warming: A robust decadal response to strong tropicalvolcanic eruptions
Der generationsspezifische Blick auf die individuelle, familiale und kollektive Vergangenheit von Deutschen aus der Sowjetunion
No full textDer generationsspezifische Blick auf die individuelle, familiale und kollektive Vergangenheit von Deutschen aus der Sowjetunion
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Established and Outsiders at the Same Time - Self-Images and We-Images of Palestinians in the West Bank and in Israel
No full textPalestinians frequently present a harmonizing and homogenizing we-image of their own national we-group, as a way of counteracting Israeli attempts to sow divisions among them, whether through Israeli politics or through the dominant public discourse in Israel. However, a closer look reveals the fragility of this homogenizing we-image which masks a variety of internal tensions and conflicts. By applying methods and concepts from biographical research and figurational sociology, the articles in this volume offer an analysis of the Middle East conflict that goes beyond the polar opposition between “Israelis” and “Palestinians”. On the basis of case studies from five urban regions in Palestine and Israel (Bethlehem, Ramallah, East Jerusalem, Haifa and Jaffa), the authors explore the importance of belonging, collective self-images and different forms of social differentiation within Palestinian communities. For each region this is bound up with an analysis of the relevant social and socio-political contexts, and family and life histories. The analysis of (locally) different figurations means focusing on the perspective of Palestinians as members of different religious, socio-economic, political or generational groupings and local group constellations – for instance between Christians and Muslims or between long-time residents and refugees. The following scholars have contributed to this volume: Ahmed Albaba, Johannes Becker, Hendrik Hinrichsen, Gabriele Rosenthal, Nicole Witte, Arne Worm and Rixta Wundrak. Gabriele Rosenthal is a sociologist and professor of Qualitative Methodology at the Center of Methods in Social Sciences, University of Göttingen. Her major research focus is the intergenerational impact of collective and familial history on biographical structures and actional patterns of individuals and family systems. Her current research deals with ethnicity, ethno-political conflicts and the social construction of borders. She is the author and editor of numerous books, including The Holocaust in Three Generations (2009), Interpretative Sozialforschung (2011) and, together with Artur Bogner, Ethnicity, Belonging and Biography (2009)
Enhancement of survival and growth in crowded groups: the road towards an intensive production of the noble crayfish Astacus astacus L. in indoor recirculation systems
No full textHigh mortality from cannibalism in crowded cultures of the noble crayfish (Astacus astacus L.) was the reason why the efforts for an intensive production of this species in the 1980s were largely stopped. In the present study, 14- to 15-month-old juveniles of A.astacus were cultured in tanks of an indoor recirculation system under constant summer conditions' (19 degrees C, LD 16:8) from early August to late January. The animals continued to moult and grow, indicating that the absence of these processes in the field from autumn to late spring does not involve any endogenous programming. The experimental design (suitable hiding places in excess, highly diversified diet, and special daily and lunar light regimes) ensured high survival (>90%) and growth rates which were largely independent of stocking rate (1560individuals per m2). Moulting occurred during daytime which allowed freshly moulted animals to escape from cannibalistic attacks of their nocturnal conspecifics. There is a first indication that an artificial moonlight cycle can synchronize moulting events (maximum around new moon'), in this way contributing to a further decrease in mortality. The results encourage a resumption of efforts for an intensive production of A.astacus in indoor recirculation systems
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