Böcker utgivna av Cuvillier

Carbon is the centerpiece in most chemicals and fuels. In light of climate change non-fossil paths to supply it are necessary. Carbon monoxide is a key molecule for carbon utilization. Forming it into hydrocarbons is an established process. Gliding arc plasma sources can produce it by ¿warm¿ plasma, which has high reactivity and space-time yield at low energy input.The first part of this work deals with the construction and characterization of two gliding arc plasma sources and driver circuits. In the second part, they are used to split CO¿ into carbon monoxide and oxygen in a coaxial reactor utilizing a ceramic quench. Two new plasma processes are presented in the third part as less energy intensive alternatives: The calcination of a carbonates and simultaneous splitting of CO¿ by plasma as well as the gasification of organic solid waste coupled to reforming to syngas. In the fourth part, the processes are evaluated economically for a simplified example syngas-to-methanol plant.

Looking to gain valuable insights into the relationship between museums and the art market? The unique data set can help answer some of the most pressing questions in this area.At first glance, museums and the art market may seem like two opposing forces, but actually they are two interrelated elements that work together to stimulate creativity, foster cultural exchange, and drive economic growth. The research delves into the complex relationship between these two entities and offers initial insights into the following questions:- How forthcoming are museum staff with sensitive data to support academic research?- What impact do masterpieces and ¿superstars¿ have on visitor numbers?- Can certain exhibition formats reach more visitors?- How has the number of exhibitions over time affected attendance and museum budgets?- Does the museums¿ passion for collecting compete with the marketing demands of the art market, or do they rather benefit from each other?- Are the art market and the museum institution competing or complementary markets?- Compared to auction results, how does the gender gap between female and male artists compare in museum acquisitions?With this research, yoüll gain access to valuable information that can help you make informed decisions about your creative and cultural industry investments.

Over the years, birches keep declining at various locations in Europe especially in cities,parks streets as well as forest due to biotic and abiotic stress factors.The decline of birches is characterized by die-back of twigs, branches, and can lead to theloss of tree crown, and finally to death of the tree. Virus-suspected leaf symptoms wereobserved on declining birches, which were attributed to Birch leaf rolldisease (BLRD). Investigations from this thesis give an impressionthat, the birches can be infected by more virus species than ever assumed. The birch has a complex virome than expected and the decline cannot be attributed notjust to a particular virus. Modern techniques, such as high-throughput sequencing (HTS),gave a comprehensive identification of possible viral pathogens present in the birch genome.In 2014, sequences of a previously unknown viruses could be discovered in symptomatic leafsamples of the genus Betula. Investigations of the prevalent birchviruses (BLRaV, CLRV, BiCV and ApMV) led to discovery of new viral signatures (e.g.Birch capillovirus, Birch caulimovirus, Birch benyvirus and Birch idaeovirus) in leaf samplesfrom different areas in Europe. This indicates a wide distribution of these viruses as discussedin this thesis. The sequences obtained from complex virome RNA-Seq were about 70 %similar to known plant viruses. With the aid of the high-throughput sequences, RT-PCRbaseddetection systems for newly discovered viruses have been developed. Furthermore, thegenome of these new viruses was to be further characterized and first results on thedissemination of them were presented.

https://cuvillier.de/de/shop/publications/8817-desertification-land-degradation-and-drought-resilienceA growing body of research and scientific as well as local evidence has shown that climate change impacts is on the rise with its attendant risks/hazards for the land system, even as it relates to DLDD, these being exacerbated by anthropogenic factors; thus, pushing the earth system to a tipping point therefore requiring that society braze up its coping capacities to avert the impending danger.This book highlights the urgent need to move from desertification, land degradation and drought (DLDD) risk management to resilience. The aim is to provide new insight on the issues of DLDD and stir policy guide on vulnerability reduction and building adaptive capacities so as to achieve sustainable development and identify pathways to a land degradation neutral world.It is worthy to note that globally, about one fifth of earth¿s land area ¿ more than 2 billion hectares ¿ is degraded; and this jeopardizes the livelihoods of more than 3.5 billion people, i.e., about 40% of the world population. The global population is still growing and is projected to reach 8.3 billion people by 2030. Such growth will put unprecedented pressure on the productivity of the land system from day to day.

This book investigates Albert Schweitzer¿s research on China, which first emerged in the 1910s and ended in 1939/40. Schweitzer¿s China research evolved alongside the development of his ¿Kulturphilosophie¿ research for over a quarter of a century. In ¿Part I: In Preparation,¿ this book will mainly focus on the historical background against which Schweitzer formulated his Reverence for Life and established his networks with the China experts. In ¿Part II: In Progress,¿ Schweitzer¿s periodic research outcomes, which were presented in several of his publications and manuscripts, will be studied. Subsequently, in ¿Part III: In Completion,¿ Richard Wilhelm¿s translation of the Yi Jing, which lay down the fundamental principles for Chinese thought, Schweitzer¿s final manuscript from 1939/40 under the title Geschichte des indischen und chinesischen Denkens, and his final depiction of Chinese thought will be given special attention.The starting point for Schweitzer¿s China research was his ideal ethical philosophy of Reverence for Life, which he formulated in the context of the decline of the Western civilization and was heavily shaped by his religious and philosophical convictions. Reverence for Life underscored humanistic concerns, and its ideals eventually became Schweitzer¿s interpretative principles in his investigation of Chinese thought. Schweitzer was never a specialist in Chinese thought and Chinese civilization. Dependent on the research of European sinologists, his China research served to justify the necessity for Reverence for Life as well as of the methods for applying this new ethical philosophy. During his entire China research, Schweitzer made great efforts to critically interpret and transform the knowledge that had been conveyed by European sinologists such as Richard Wilhelm. Although in his final research Schweitzer had already seen great resemblance between classical Confucianism in China and his Reverence for Life, he did not ultimately manage to verify his assumptions. His final manuscript on Chinese thought from 1939/40 remained unpublished when he passed away in 1965.

During the past years, wireless communication systems have been rapidly advancing to meet the high data-rate requirements of various emerging applications. However, the existing transceivers have typically been demonstrated using CMOS-compatible technologies that deliver a relatively low equivalent isotropic radiated power in a small unit cell. Moreover, the particular device characteristics are limiting the linear region for operation. Therefore, the main focus of this dissertation is to present and discuss new design methods for transceivers to solve these issues.To reduce the complexity of the transceiver module for further phased-array scaling, a low-noise power amplifier design approach is designed using a 0.15-¿m GaN-on-SiC high-electron mobility transistor technology (HEMT). Utilizing a traded off interstage matching topology between loss and bandwidth, the conversion loss induced by the matching network could be effectively reduced. A stacked-FET configuration was adopted to enhance the power handling of the RF switch. Further improvement on the isolation bandwidth was investigated using theoretical analysis on the intrinsic effect of the passive HEMTs.With the successful implementation of the RF front-end circuits, transceiver modules were integrated on Rogers RO3010 substrate. The planar dual exponentially tapered slot antenna phased-array system showed a compact size with simple biasing network compared to the conventional transceiver approach. The presented T/R module was characterized with an over-the-air test at a distance of 1 m, overcoming the free space path loss of 64 dB. It also shows a high flexibility for further integration with a larger number of array systems, which is very promising for future 5G communication systems.

Spatial correlations are of fundamental importance for many fascinating aspects of solid state physics, such as non-Fermi-liquid behavior, spin fluctuations, high-temperature superconductivity and quantum criticality.The major part of this book is devoted to the dual fermion approach, which combines numerical and field theoretical diagrammatic methods to describe the effects of spatial correlations beyond dynamical mean-field theory (DMFT). The approach is generalized in various respects. It is shown that it has superior convergence properties compared to standard diagrammatic extensions of DMFT and its applicable even in presence of strong interactions. Numerical calculations employ the recently developed continuous-time quantum Monte Carlo methods, which are generalized to compute two-particle correlations functions.These techniques are used to study the two-plane Hubbard model on the Bethe lattice, the spatial correlations around a Kondo impurity and the Hubbard model in finite dimensions. Based on a ladder approximation to the dual-energy, a scheme is proposed which for the first time will allow a realistic and computationally feasible description of strongly correlated materials for which the correlations are manifestly long-ranged.In addition to the key scientific results, this book contains significant introductory materials to the models, methods and concepts used for the theoretical description of quantum many-particle systems. In particular the continuous-time quantum Monte Carlo methods are described in detail and on an elementary level. Providing technical details and complete derivations, this book is meant to help in the implementation of these novel approaches and to serve as an introduction and a reference for students beginning to work in this field.

For more than 20 years, the so-called field-oriented control is standard for controlled electric drive systems. Until now, the strategies based on this method fulfill completely the requirements of drive technology. However, due to the system characteristics, an arbitrary improvement of the controller properties is not possible. Predictive or precalculating control methods which need no controller cascade are an alternative.Main focus of this work is to examine model-based predictive controllers for their applicability in drive technology. These methods with their high prediction horizon are well-known from classic control theory and in process engineering they are applied with great success. Several strategies are presented, explained and evaluated, whereas, at the same time, the interested reader gets advice for the implementation of these methods. Since model-based predictive control is, until now, not very common in drive technology, this work also includes detailed derivations of the control algorithms.