PhoenixD Magazine - News from the German Cluster of Excellence on Optics and Photonics

News from the German Cluster of Excellence PhoenixD on Optics and Photonics at Leibniz University Hannover with reports, interviews, portraits and the PhoenixD chronicle. Scientific topics are integrated optics, optics production, optical materials and others.DFG - Deutsche Forschungsgemeinschaft/Exzellenzstrategie des Bundes und der Länder/EXC 2122, Projekt-ID 390833453/E

Shielding Calculations on Waste Packages – The Limits and Possibilities of different Calculation Methods by the example of homogeneous and inhomogeneous Waste Packages

For nuclear waste packages the expected dose rates and nuclide inventory are beforehand calculated. Depending on the package of the nuclear waste deterministic programs like MicroShield® provide a range of results for each type of packaging. Stochastic programs like “Monte-Carlo N-Particle Transport Code System” (MCNP®) on the other hand provide reliable results for complex geometries. However this type of program requires a fully trained operator and calculations are time consuming. The problem here is to choose an appropriate program for a specific geometry. Therefore we compared the results of deterministic programs like MicroShield® and stochastic programs like MCNP®. These comparisons enable us to make a statement about the applicability of the various programs for chosen types of containers. As a conclusion we found that for thin-walled geometries deterministic programs like MicroShield® are well suited to calculate the dose rate. For cylindrical containers with inner shielding however, deterministic programs hit their limits. Furthermore we investigate the effect of an inhomogeneous material and activity distribution on the results. The calculations are still ongoing. Results will be presented in the final abstract

PhoenixD Magazine - News from the German Cluster of Excellence on Optics and Photonics

News from the German Cluster of Excellence PhoenixD on Optics and Photonics at Leibniz University Hannover with reports, interviews, portraits and the PhoenixD chronicle. Scientific topics are integrated optics, optics production, optical materials and others.DFG - Deutsche Forschungsgemeinschaft/Exzellenzstrategie des Bundes und der Länder/EXC 2122, Projekt-ID 390833453/E

Vererbungstafeln [Material gráfico]

Contenido parcial: 2. Vererbung; 3. Mendelspaltung Bei Zwei Merkmalspaaren (Dihybride) ; 4. Geschlechtsvererbung, Geschlechtsgebundene Faktorem. Vererbung der bluterkrankheit ; 5. Vererbung Bezüglich Eines Merkmales. Überdeckung (Dominaz). Überdeckt in diesem falleEn la lám. n. 5 consta 193

Shielding Calculations on Waste Packages – The Limits and Possibilities of different Calculation Methods by the example of homogeneous and inhomogeneous Waste Packages

For nuclear waste packages the expected dose rates and nuclide inventory are beforehand calculated. Depending on the package of the nuclear waste deterministic programs like MicroShield® provide a range of results for each type of packaging. Stochastic programs like “Monte-Carlo N-Particle Transport Code System” (MCNP®) on the other hand provide reliable results for complex geometries. However this type of program requires a fully trained operator and calculations are time consuming. The problem here is to choose an appropriate program for a specific geometry. Therefore we compared the results of deterministic programs like MicroShield® and stochastic programs like MCNP®. These comparisons enable us to make a statement about the applicability of the various programs for chosen types of containers. As a conclusion we found that for thin-walled geometries deterministic programs like MicroShield® are well suited to calculate the dose rate. For cylindrical containers with inner shielding however, deterministic programs hit their limits. Furthermore we investigate the effect of an inhomogeneous material and activity distribution on the results. The calculations are still ongoing. Results will be presented in the final abstract

The ear in Amphisbaenia (Reptilia); further anatomical observations

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/74377/1/j.1469-7998.1973.tb02215.x.pd