Now showing items 21-30 of 597
Numerical Two-Scale Simulations of Damage Evolution at Refractory Materials
Fracture and damage processes on micro- and mesoscale are combined with macroscale simulations applying numerical multiscale approaches. Cracks and grain boundaries are reproduced in cell models that take account of transand intercrystalline crack growth. The global, in general thermomechanical boundary value problem is considered within a continuum mechanics framework. Two approaches are presented combining the scales. Simple processes on the smaller level are described in analytical models including the damage ...
A unified and memory efficient framework for simulating mechanical behavior of carbon nanotubes
Carbon nanotubes possess many interesting properties, which make them a promising material for a variety of applications. In this paper, we present a unified framework for the simulation of the mechanical behavior of carbon nanotubes. It allows the creation, simulation and visualization of these structures, extending previous work by the research group “MISMO” at TU Darmstadt. In particular, we develop and integrate a new matrix-free iterative solving procedure, employing the conjugate gradient method, that drastically ...
Financial Access and Food Productivity Nexus: Evidence from Pakistan
(Section Specialized Partnerships in Sustainable Food Systems and Food Sovereignty at the University of Kassel, Germany and Federation of German Scientists (VDW), 2018-12-26)
Food possesses a great importance in the lives of human beings as it provides energy and strength to the human body to think, grow and develop. The global population is increasing day by day, becoming even more difficult to manage food for every human being on earth. It is the responsibility of every state to provide food for its citizens. “Zero Hunger” is one of the major goals of the Sustainable Development Goals (SDGs’) which aims to eradicate hunger from world. Several causes of food insecurity are identified by ...
Total Site Utility Systems Optimisation for Milk Powder Production
This study applies the Total Site Heat Integration method, in conjunction with a detailed process and utility model, to investigate three methods to increase the energy efficiency of the utility supply system for milk powder production. Sequentially explored opportunities are: (1) increasing boiler efficiency through condensing economisers, (2) waste heat recovery from the chiller unit, and (3) Combined Heat and Power (CHP) for electricity production. The basis for the analysis is the anticipated future milk powder ...
System efficient integration of standby control and heat pump storage systems in manufacturing processes
Prerequisite for system efficiency towards an industrial energy transition is the reducing of energy demand on the process level. In typical manufacturing systems with machine tools and washing machines, the proper design of intelligent standby control and heat pump storage system (HPS) represent high efficiency. The integration of HPS is complicated due to high non-continuity, especially when implementing a standby control system. Our approach aims at designing one single HPS for multiple heat sources and sinks. ...
Understanding the emergence and evolution of pastoral community groups from the perspective of community members and external development actors in northern Kenya
(Kassel University Press, 2019-01-15)
Whereas there is abundance of information on community groups that engage in income generation in rural agricultural and peri-urban areas, information on community groups in pastoral areas still remains scarce. However, in the recent past, a growing trend of such groups has been observed in the pastoral areas in northern Kenya. This study therefore explores how these groups have emerged since Kenya’s independence in 1963 to date, and which factors have contributed to their evolution. A full survey on all income-generating ...
Effect of salt stress on muskmelon (Cucumis melo L.) seeds
Cucumis melo is one of the most appreciated and consumed vegetables in the world, however, producing areas have been suffering from increased salinity in irrigation water. Therefore, accesses of melon, from the germplasm bank of the Federal Rural Semi-Arid University (UFERSA), were tested for salinity and the physiological responses of the seedlings were evaluated. For the 24 accesses of C. melo, salinity of 0.06 and 3.45 dS m-1 was applied. For this, four subsamples of 25 seeds per access were used, which were seeded ...
Rainald Goetz' Erzählung »Rave« erscheint 1998 als erster Band des Projekts »Heute Morgen«, zu dem auch das Theaterstück »Jeff Koons« (1998), das Internettagebuch »Abfall für alle« (1999), der Theorieband »Celebration« (1999) und die Erzählung »Dekonspiratione« (2000) gehören. Während es in »Dekonspiratione« um die »Arbeitsseite des Lebens« geht, thematisiert »Rave« das Nachtleben in der Techno-Szene.
Energy Efficiency Measures for Batch Retort Sterilization in the Food Processing Industry
The purpose of this study is to highlight the energy saving potentials of a batch retort sterilization process operated by steam and to develop concepts for improving its energy efficiency. By using the methodical approach of the Onion Diagram and the recovery of low grade heat sources, four comprehensive improved energy efficiency concepts have been developed. Two concepts increase the initial product temperature resulting in lower transient steam consumption rates and a decreased energy demand. The other two options ...
„Ich mochte Sherlock Holmes lange nicht so gern wie Miss Marple“
Vielfältige intertextuelle Spuren durchziehen Andreas Steinhöfels Romane Rico, Oskar und die Tieferschatten (2008), Rico, Oskar und das Herzgebreche (2009) sowie Rico, Oskar und der Diebstahlstein (2011),1 neben Anspielungen auf Kriminalliteratur, Kriminalfilme sowie weitere literarische und filmische Werke stehen auch solche auf philosophische, mythologische und biblische Texte.