In recent years, the study of dynamical systems has developed into a central research area in mathematics. Actually, in combination with keywords such as "chaos" or "butterfly effect", parts of this theory have been incorporated in other scientific fields, e.g. in physics, biology, meteorology and economics. In general, a discrete dynamical system is given by a set X and a self-map f of X. The set X can be interpreted as the state space of the system and the function f describes the temporal development of the system. If the system is in state x ∈ X at time zero, its state at time n ∈ N is denoted by f^n(x), where f^n stands for the n-th iterate of the map f. Typically, one is interested in the long-time behaviour of the dynamical system, i.e. in the behaviour of the sequence (f^n(x)) for an arbitrary initial state x ∈ X as the time n increases. On the one hand, it is possible that there exist certain states x ∈ X such that the system behaves stably, which means that f^n(x) approaches a state of equilibrium for n→∞. On the other hand, it might be the case that the system runs unstably for some initial states x ∈ X so that the sequence (f^n(x)) somehow shows chaotic behaviour. In case of a non-linear entire function f, the complex plane always decomposes into two disjoint parts, the Fatou set F_f of f and the Julia set J_f of f. These two sets are defined in such a way that the sequence of iterates (f^n) behaves quite "wildly" or "chaotically" on J_f whereas, on the other hand, the behaviour of (f^n) on F_f is rather "nice" and well-understood. However, this nice behaviour of the iterates on the Fatou set can "change dramatically" if we compose the iterates from the left with just one other suitable holomorphic function, i.e. if we consider sequences of the form (g∘f^n) on D, where D is an open subset of F_f with f(D)⊂ D and g is holomorphic on D. The general aim of this work is to study the long-time behaviour of such modified sequences. In particular, we will prove the existence of holomorphic functions g on D having the property that the behaviour of the sequence of compositions (g∘f^n) on the set D becomes quite similarly chaotic as the behaviour of the sequence (f^n) on the Julia set of f. With this approach, we immerse ourselves into the theory of universal families and hypercyclic operators, which itself has developed into an own branch of research. In general, for topological spaces X, Y and a family {T_i: i ∈ I} of continuous functions T_i:X→Y, an element x ∈ X is called universal for the family {T_i: i ∈ I} if the set {T_i(x): i ∈ I} is dense in Y. In case that X is a topological vector space and T is a continuous linear operator on X, a vector x ∈ X is called hypercyclic for T if it is universal for the family {T^n: n ∈ N}. Thus, roughly speaking, universality and hypercyclicity can be described via the following two aspects: There exists a single object which allows us, via simple analytical operations, to approximate every element of a whole class of objects. In the above situation, i.e. for a non-linear entire function f and an open subset D of F_f with f(D)⊂ D, we endow the space H(D) of holomorphic functions on D with the topology of locally uniform convergence and we consider the map C_f:H(D)→H(D), C_f(g):=g∘f|_D, which is called the composition operator with symbol f. The transform C_f is a continuous linear operator on the Fréchet space H(D). In order to show that the above-mentioned "nice" behaviour of the sequence of iterates (f^n) on the set D ⊂ F_f can "change dramatically" if we compose the iterates from the left with another suitable holomorphic function, our aim consists in finding functions g ∈ H(D) which are hypercyclic for C_f. Indeed, for each hypercyclic function g for C_f, the set of compositions {g∘f^n|_D: n ∈ N} is dense in H(D) so that the sequence of compositions (g∘f^n|_D) is kind of "maximally divergent" " meaning that each function in H(D) can be approximated locally uniformly on D via subsequences of (g∘f^n|_D). This kind of behaviour stands in sharp contrast to the fact that the sequence of iterates (f^n) itself converges, behaves like a rotation or shows some "wandering behaviour" on each component of F_f. To put it in a nutshell, this work combines the theory of non-linear complex dynamics in the complex plane with the theory of dynamics of continuous linear operators on spaces of holomorphic functions. As far as the author knows, this approach has not been investigated before.

Ausgelotet wird in diesem Aufsatz das Spektrum der ästhetischen und technischen Entwicklung des ältesten Genres, das der Film hervorgebracht hat: der Reisefilm. Schwerpunkt der Analyse ist das Frühe Kino und dessen filmästhetische Besonderheiten. rnNeue experimentelle Formen - wie die "Cartes postales Video" von Robert Cahen und filmkünstlerische Verwandlungen historischer Reisefilme durch die Mailänder Künstler Yervant Gianikian und Angela Ricci Lucchi - greifen zeitgenössisch auf dieses kreative Potential der Frühzeit des Kinos zurück. rn

Was ist Reiseliteratur? Mit diesem vagen und historisch divergenten Begriff befasst sich dieser Artikel. Die literarische Dimension trifft, so die These, auf die historische Ankunft der Figur des Touristen und der Ausformung des Reisens als Massenphänomen im 19. Jahrhundert: ein Begriffswandel vom Reisenden zum Tourist

Die Arbeit analysiert Bedeutungen von Körperlichkeit im Straßenprotest. Ausgehend von den Selbstwahrnehmungen von Aktivist_innen wird dabei der Frage nachgegangen, wie Erfahrungen den reflexiven Umgang mit Verletzlichkeit und Verletzungsmacht prägen. Zunächst wird dafür eine theoretische Konzeption einer leibkörperlich gebundenen Reflexivität entwickelt. Pierre Bourdieus Theorie der Praxis, die sich der Verkörperung von Wissen widmet, wird ergänzt durch den Rückbezug auf Maurice Merlau-Ponty, der konsequenter herausstellt, dass jegliche Wahrnehmung immer nur körperlich-leiblich möglich ist. Während Merleau-Pontys Fokus auf dem wahrnehmenden Leib liegt, wird mit der philosophischen Anthropologie Helmuth Plessners die Verschränkung von wahrnehmendem Leib und wahrgenommenem Körper, bzw. wie Wahrgenommenes reflexiv auf das Spüren und Erleben zurückwirkt, nachvollziehbar. Aufbauend auf Plessner hat Heinrich Popitz eine Phänomenologie der Macht entwickelt, in deren Zentrum die anthropologischen Grundkonstanten von menschlicher Verletzungsoffenheit und Verletzungsmacht stehen. Diese Konzeption, verbunden mit Ergebnissen aus verschiedenen Vorstudien zur vorliegenden Arbeit, leitet die empirische Analyse von zehn leitfadengestützten Interviews, in denen Aktivist_innen mit teilweise langjähriger Straßenprotestbiographie zu ihren Erfahrungen und Praktiken in Straßenprotesten befragt werden. Die Arbeit ist an der Schnittstelle der drei Teildisziplinen Politische Soziologie, Körpersoziologie und Wissenssoziologie angesiedelt. Innerhalb der Politischen Soziologie liegen die Anknüpfungspunkte insbesondere in der sozial- und kulturwissenschaftlichen Protestforschung. Hier ist der Körper nach wie vor weitgehend marginalisiert und es existieren bisher in Anbetracht des insgesamt kaum noch überschaubaren Umfangs der Protestforschung vergleichsweise wenige Studien. Hinsichtlich der Körpersoziologie zielt die Arbeit - insbesondere mit der Bezugnahme auf Plessners philosophische Anthropologie - auf einen Erkenntnisgewinn hinsichtlich der Verbindung von Körpersoziologie und politischer Soziologie. Es lässt sich vor allem in den letzten Jahren eine deutliche Renaissance Plessners innerhalb der allerdings fast ausschließlich deutschsprachigen Körpersoziologie feststellen. Die körpersoziologischen Arbeiten sind bisher jedoch kaum im Rahmen einer politischen Soziologie aufgegriffen worden. Eine solche Brücke möchte die vorliegende Arbeit insbesondere via Popitz (und z.T. Michel Foucault) schlagen. Wissenssoziologisch folgt die Arbeit dem Verständnis eines verkörperten Wissens, wie es vor allem in Bezug auf Bourdieu konzeptionalisiert wird. Es werden Überlegungen aufgegriffen, die sich u.a. auch Analysen und Konzepten der Dance Studies oder der Sportsoziologie hinsichtlich körperlicher Reflexion verdanken. Im Anschluss an die phänomenologisch orientierten Arbeiten Bourdieus und Merleau-Pontys sowie an Plessners philosophische Anthropologie werden dabei sogenanntes kognitives und körperliches Wissen integriert und die unmittelbare Verschränkung beider Wissensformen aufgezeigt.

Evapotranspiration (ET) is one of the most important variables in hydrological studies. In the ET process, energy exchange and water transfer are involved. ET consists of transpiration and evaporation. The amount of plants transpiration dominates in ET. Especially in the forest regions, the ratio of transpiration to ET is in general 80-90 %. Meteorological variables, vegetation properties, precipitation and soil moisture are critical influence factors for ET generation. The study area is located in the forest area of Nahe catchment (Rhineland-Palatinate, Germany). The Nahe catchment is highly wooded. About 54.6 % of this area is covered by forest, with deciduous forest and coniferous forest are two primary types. A hydrological model, WaSiM-ETH, was employed for a long-term simulation from 1971-2003 in the Nahe catchment. In WaSiM-ETH, the potential evapotranspiration (ETP) was firstly calculated by the Penman-Monteith equation, and subsequently reduced according to the soil water content to obtain the actual evapotranspiration (ETA). The Penman-Monteith equation has been widely used and recommended for ETP estimation. The difficulties in applying this equation are the high demand of ground-measured meteorological data and the determination of surface resistance. A method combined remote sensing images with ground-measured meteorological data was also used to retrieve the ETA. This method is based on the surface properties such as surface albedo, fractional vegetation cover (FVC) and land surface temperature (LST) to obtain the latent heat flux (LE, corresponding to ETA) through the surface energy balance equation. LST is a critical variable for surface energy components estimation. It was retrieved from the TM/ETM+ thermal infrared (TIR) band. Due to the high-quality and cloudy-free requirements for TM/ETM+ data selection as well as the overlapping cycle of TM/ETM+ sensor is 16 days, images on only five dates are available during 1971-2003 (model ran) " May 15, 2000, July 05, 2001, July 19, August 04 and September 21 in 2003. It is found that the climate conditions of 2000, 2001 and 2003 are wet, medium wet and dry, respectively. Therefore, the remote sensing-retrieved observations are noncontinuous in a limited number over time but contain multiple climate conditions. Aerodynamic resistance and surface resistance are two most important parameters in the Penman-Monteith equation. However, for forest area, the aerodynamic resistance is calculated by a function of wind speed in the model. Since transpiration and evaporation are separately calculated by the Penman-Monteith equation in the model, the surface resistance was divided into canopy surface resistance rsc and soil surface resistance rse. rsc is related to the plants transpiration and rse is related to the bare soil evaporation. The interception evaporation was not taken into account due to its negligible contribution to ET rate under a dry-canopy (no rainfall) condition. Based on the remote sensing-retrieved observations, rsc and rse were calibrated in the WaSiM-ETH model for both forest types: for deciduous forest, rsc = 150 sm−1, rse = 250 sm−1; for coniferous forest, rsc = 300 sm−1, rse = 650 sm−1. We also carried out sensitivity analysis on rsc and rse. The appropriate value ranges of rsc and rse were determined as (annual maximum): for deciduous forest, [100,225] sm−1 for rsc and [50,450] sm−1 for rse; for coniferous forest, [225,375] sm−1 for rsc and [350,1200] sm−1 for rse. Due to the features of the observations that are in a limited number but contain multiple climate conditions, the statistical indices for model performance evaluation are required to be sensitive to extreme values. In this study, boxplots were found to well exhibit the model performance at both spatial and temporal scale. Nush-Sutcliffe efficiency (NSE), RMSE-observations standard deviation ratio (RSR), percent bias (PBIAS), mean bias error (MBE), mean variance of error distribution (S2d), index of agreement (d), root mean square error (RMSE) were found as appropriate statistical indices to provide additional evaluation information to the boxplots. The model performance can be judged as satisfactory if NSE > 0.5, RSR ≤ 0.7, PBIAS < -±12, MBE < -±0.45, S2d < 1.11, d > 0.79, RMSE < 0.97. rsc played a more important role than rse in ETP and ETA estimation by the Penman-Monteith equation, which is attributed to the fact that transpiration dominates in ET. The ETP estimation was found the most correlated to the relative humidity (RH), followed by air temperature (T), relative sunshine duration (SSD) and wind speed (WS). Under wet or medium wet climate conditions, ETA estimation was found the most correlated to T, followed by RH, SSD and WS. Under a water-stress condition, there were very small correlations between ETA and each meteorological variable.