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We study Siegel disks in the dynamics of functions from the tangent family. In particular, we prove that a Siegel disk is unbounded if and only if the boundary of its image contains at least one asymptotic value. Moreover, by using quasiconformal surgery we also construct functions in the above family with bounded Siegel disks.
Om kejsarinnan Elisabeth av Bayern.
Den klimatdrivna energiomställningen kommer att ställa omfattande krav på elsystemet. Ny förnybar produktionskapacitet och ny överföringskapacitet måste byggas i ett mycket snabbt tempo. Detta kommer att skapa utmaningar av två olika slag: i) att planera och bygga sådan kapacitet tar lång tid där det kan ta 10 år från idé till utbyggnad, ii) skalan i utbyggnaden kommer innebära ökad risk för konfl
This chapter concerns the role of competition policy, and in particular EU State aid rules, in the European integration process. The Treaty of the Functioning of the European Union contains a ban on State aid. However, this ban is not without exceptions. Through a centralized system, there is scope for exceptions in many policy areas. This also applies to areas where the member states are reluctan
The complex interplay of the tumour and immune cells affects tumour growth, progression, and response to treatment. Restorationof effective immune response forms the basis of onco-immunology, which further enabled the development of immunotherapy. Inthe era of precision medicine, pin-pointing patient biological heterogeneity especially in relation to patient-specific immunemicroenvironment is a ne
Accurate train delay prediction is vital for effective railway traffic planning and management as well as for providing satisfactory passenger service quality. Despite significant advances in data-driven train delay predictions, it lacks of a systematic review of studies and unified modelling development framework. The paper reviews existing studies with an explicit focus on synthesizing a structu
In the interactive effects panel data literature information criteria are commonly used to consistently determine which of the estimated principal components factors to include. The present paper shows that the same approach can be applied to factors estimated by taking the cross-sectional averages of the observables, as prescribed by the popular common correlated effects (CCE) approach. This shou
Inter-organisational projects depend on stakeholder interactions and joint decision-making to perform and continually adjust to variations. This paper examines the emergence of transformative resilience (i.e., dynamic project capabilities to pursue fundamentally new strategies and practices) when facing external disruptions. A process-orientated case study was conducted within a culturally diverse
Continuous access to flows of goods and services, such as energy, transport, information, and food, is essential and the basis for functioning modern societies. Hence, they are critical and need to be secured. Mega-trends such as climate change, changing geopolitical environment, hybrid- and cyber threats, and rapid technological advances come with new challenges and emerging threats to securing f
Wild insect pollinators are essential to cultivated and natural ecosystems globally. Today, many pollinator species are declining. One reason is a general lack of flowering habitats at landscape scales. However, urban areas, including private gardens, may provide flowers, and constitute beneficial habitats for pollinators. Here, we evaluate the ecological outcomes of a citizen science campaign run
