Proteins from blood

Blood is the most important byproduct of slaughtering; it consists predominantly of protein and water, and is a valuable protein resource. The protein content in blood from domestic meat animals is equivalent to 6-7 percent of the lean meat content in the carcass. Because of the nutritionally valuable composition of blood and the large amounts of blood available from slaughterhouse, utilization of such blood seems reasonable. A requirement for blood that is utilized in human consumption is its hygienic collection

The impact of exogenous factors on selective visual attention

Die heutige Arbeitswelt beruht vermehrt auf kognitiven Tätigkeiten, die durch verschiedene Humanfaktoren beeinflusst werden können. Hierbei ist vor allem der Blick auf Aufmerksamkeitsprozesse interessant, da diese die Basis für bewusste Wahrnehmung bilden. Basierend auf einem physiologischen Modell des attentional effort werden in dieser Dissertation die Wirkungen verschiedener Faktoren in Bezug auf Verhalten und elektrophysiologische Maße analysiert. Aufgrund der nur moderaten beobachteten Effekte im Labor und der eingeschränkten Übertragbarkeit auf einen realen Arbeitskontext wird im Folgenden eine neuroergonomische Arbeitsplatzsimulation beschrieben, bei der die Analysen des mobilen EEG auf Augenblinzeln bezogen wurden. Abschließend werden weitere Herausforderungen und Möglichkeiten der mobilen neuroergonomischen Ansätze in Hinblick auf Aufmerksamkeitsleistungen und attentional effort diskutiert

Sounding Rocket "HEROS" - A Low-Cost Hybrid Rocket Technology Demonstrator

The inherent safety of hybrid rocket propulsion offers some unique advantages com- pared to solid and liquid propellant rocket engines. This makes it especially attractive for space tourism, Micro-launcher and hands-on experiments in the education of students. On November 8th, 2016 at 10:30 a.m. the hybrid sounding rocket HEROS 3 was launched from the ESRANGE Space Center to an apogee altitude of 32,300m (106,000 ft). This set a new altitude record for European student and amateur rocketry and a world altitude record for hybrid rockets built by students. The 7.5m long rocket was using Nitrous Oxide (N2O) and a Paraffin-based fuel to produce 10,000N of thrust. The dry mass of the rocket was only 75 kg thanks to a carbon fibre structure for the most part. The rocket performed the record breaking flight at perfect weather and visibility conditions, reaching a maximum airspeed of 720 m/s and Mach 2.3. The rocket performed a soft landing with two parachutes and can be reused. Flight data and engine performance data are published and analyzed. The flight data shows excellent stability of the rocket. Engine performance data proves very high efficiency and stable combustion as in the ground tests. The subsystem design and verification before the launch is reported. Engine and flight trajectory simulations show very good agreements with the flight data. Furthermore, the overall project, the rocket design, the subsystems as well as the launch campaign are presented here in detail

Injection Effects in Hybrid Rocket Engines

There exists a growing interest in Hybrid rocket engines over the last years. Lots of research has been done on hybrids in general and on topics like combustion efficiency and stability in detail. But only minor work has been done on the design and performance of the injector type. This is especially important since combustion stability can be closely linked to the type of injector and configuration of the pre-combustion chamber. In the present paper a detailed review on earlier work regarding combustion stability has been done. Hot flow experiments have been carried out to evaluate the performance of different injector types including impingement, showerhead and swirl injectors. Characteristic velocity, ISP efficiency and regression rates during hot fire tests are evaluated and compared. Combustion stability is evaluated by means of Fast-Fourier Transformations and spectrograms of the pressure signals. Impingement injectors with high impingement angles produce unstable flow fields which excite vortex shedding and the Helmholtz acoustic mode of the combustion chamber

HEROS - Sounding Rocket Development by the HyEnD Project

The student team Hybrid Engine Development (HyEnD) of the University of Stuttgart is taking part with the Institute of Space Systems (IRS) in the DLR educational program STERN (Studentische Experimentalraketen). This program supports students at German universities to design, build and launch an experimental rocket within 3 years. HyEnD is developing a hybrid rocket called HEROS (Hybrid Experimental Rocket Stuttgart) with a thrust of 10 kN, a total impulse of over 100 kNs and an expected lift off weight up to 175 kg. HEROS is aimed to be launched in October 2015 from Esrange in Sweden to an expected flight altitude of 40 to 50 km. The current altitude record for amateur rockets in Europe is at approximately 12.5 km. HEROS’ hybrid rocket engine HyRES uses a paraffin-based solid fuel and nitrous oxide as the liquid oxidizer. In the course of the STERN program the student team not only has to master the difficulties of a high thrust hybrid rocket engine but also the development of a light weight oxidizer tank, valves, rocket structure, recovery system and electronics. Concluding, the development and construction of a lightweight hybrid sounding rocket for the given requirements and budget is described herein

Emissionssituation in der Nahrungsmittelindustrie Studie

Available from TIB Hannover: F94B426 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman