Products
Cold gas spraying of photocatalytically active titanium dioxide coatings
A water pipe that purifies its contents as it flows? A coating that breaks down air pollutants as they flow by? A surface that disinfects itself and keeps itself clean? What sounds like science fiction becomes possible with the photocatalyst titanium dioxide. Under UV light, titanium dioxide is able to purify air and water, kill bacteria on its surface and break down fats. Although these properties have been known since the 1970s, the breakthrough of photocatalytically active titanium dioxide is...
€39,90
Cologne in the First World War. Changes in the city and the life of the citizens 1914-1918
"There is no end to the making of many books!" This quote from Ecclesiastes 12 could be used to comment on the appearance of new literature on Cologne during World War II. However, it does not apply to the time of the First World War. A detailed description of this part of Cologne's history has so far been missing - although a book about Düsseldorf during the First World War was already available in 1927. This study aims to fill...
€59,90
Compensating wage differentials in segmented labor markets
More than 200 years have passed since Adam Smith described the theory of compensating wage differentials. Although theory offers a simple yet compelling explanation for wages associated with job characteristics, the empirical evidence is conflicting. So why do workers with disadvantageous working conditions earn less and not more? The theory of compensating wage differentials assumes a perfect labor market, which is not to be found in reality. The approach presented is to remove some of the assumptions. This results in...
€39,90
Cultural transfer in the Carpathian arc
The fate of an individual is often not given enough attention in the historical context, often due to a lack of sources. How did Transylvanian Saxons who had decided to become teachers and pastors perceive their personal development? What impression did the happy and sad events of both their own lives and of world history make on them? A family book that was found in October 2005 in almost unedited condition provides answers to these questions in biographies from the...
€69,95
Large Eddy Simulation of Premixed Combustion Using Artificial Flame
This work considers the simulation of premixed combustion with regard to the application in stationary gas turbines and future aero engines. With respect to the pollutant reduction of current devices as well as complementary technologies in the context of renewable energies, premixed flames are of increasing importance but exhibit reduced stability properties compared to conventional non-premixed systems. Regarding this, the simulation can provide detailed insight into the physical mechanisms for scientific research as well as help in the design of...
€39,90
Laser-based investigation of flame-wall interaction
The interaction of flames and combustion chamber walls occurs in almost all common technical combustion systems. Incomplete combustion leads to an increased formation of pollutants in the area close to the wall. Current developments to increase the efficiency of internal combustion engines and aircraft engines are often based on reducing combustion chambers while maintaining or increasing performance. The more compact combustion chambers increase the surface-to-volume ratio, so that the flame-wall interaction will become more important in future combustion system developments....
€39,90
Laser-based investigation of the processes in a gasoline engine with steel-guided combustion
The automobile with a combustion engine forms a fundamental part of our transport system and will retain this importance in the years to come. The development of even more efficient engines is therefore an important field of research. In the field of gasoline engines, charge stratification by means of multiple injection offers particular potential for this. The aim of this work is to investigate the internal engine processes with a focus on identifying possible causes of cycle-to-cycle fluctuations. For this...
€39,90
Laser-based investigation of internal engine processes
The energy conversion in combustion engines plays an important role both for the flow of goods and for individual transport. From the point of view of the scarcity of raw materials and the constant growth in population, a detailed understanding of the physical relationships is necessary in order to be able to carry out this conversion process with optimal efficiency and thus efficient use of resources. The aim of this work is to gain a deeper understanding of the internal...
€39,90
Laser-optical investigation of the flame-cooling-air interaction in an effusion-cooled combustor
The combustion of hydrocarbons in a gas turbine will form the basis for aircraft propulsion for the foreseeable future. In order to minimize the environmental impact of this technology, novel combustion processes must be developed and loss processes within the gas turbine combustion chamber optimized. Current research areas relate to lean premixed combustion and the optimization of the cooling air requirement of the effusion-cooled combustion chamber wall. The aim of this work is to set up a gas turbine combustor...
€39,90
Fields of learning as a representation of the world of work and life
How should learning objects be selected so that they can develop the human ability that is necessary to actively help shape the life and work environment of the students? This thesis presents a model that can be used to make better use of the degrees of freedom that were transferred to teachers in the vocational education system through the introduction of the learning fields, and would thus encourage further curricular interventions and discussions. Details Title: Fields of learning as a...
€39,90
Weidt, Dr. Christopher Ferdinand
Abuse of relative buyer power in ongoing business relationships
Buyer power is playing an increasing role in the competition policy discussion, especially against the background of an ever more concentrated food retail trade. Current case law as well as proceedings and investigations by the Federal Cartel Office have recently brought the topic into the focus of science.The present study comes to the conclusion that buyer power manifests itself in the form of bilateral bargaining power and provides the legal practitioner with criteria for their existence. In addition, she examines...
€61,90
Mobile technologies in the insurance industry
The use of mobile devices and the sale of mobile applications/applications (apps) continue to increase rapidly. It is expected that smartphones will soon replace computers and laptops as the most used end device. These trends result in new challenges for companies across all industries, which put great pressure on them. The only way companies can withstand this pressure and stay competitive is to develop their own mobile strategy and ensure that strategy is aligned with overall corporate strategy. On the...
€29,90