Description of radiation damage in diamond sensors using an effective defect model

The BCML system is a beam monitoring device in the CMS experiment at the LHC. As detectors poly-crystalline diamond sensors are used. Here high particle rates occur from the colliding beams scattering particles outside the beam pipe. These particles cause defects, which act as traps for the ionization, thus reducing the CCE. However, the loss in CCE was much more severe than expected. The reason why in real experiments the CCE is so much worse than in laboratory experiments is related to the rate of incident particles. At high particle rates the trapping rate of the ionization is so high compared with the detrapping rate, that space charge builds up. This space charge reduces locally the internal electric field, which in turn increases the trapping rate and hence reduces the CCE even further. In order to connect these macroscopic measurements with the microscopic defects acting as traps for the ionization charge the TCAD simulation program SILVACO was used. Two effective acceptor and donor levels were needed to fit the data. Using this effective defect model the highly non- linear rate dependent diamond polarization as function of the particle rate environment and the resulting signal loss could be simulated

Loss Given Default - Modelle zur Schätzung von Recovery Rates

Loss Given Default (LGD) is a major element for pricing credits and bonds. As there has been a substantial amount of research during the last years, this paper aims to give an overview. Initially, defaults and recovery definitions for credits and the differences to bonds are discussed. A survey of the empirical literature is given, finding average recovery rates for credits between 40% and 87% and lower rates for bonds. A survey of the literature on the influences on LGD showed 17 parameters. Based on these studies we suggest 6 parameters for LGD estimation. Finally an overview of LGD models is given including Standard & Poors and Moody´s KMV

Geant4 Simulation of a filtered X-ray Source for Radiation Damage Studies

Geant4 low energy extensions have been used to simulate the X-ray spectra of industrial X-ray tubes with filters for removing the uncertain low energy part of the spectrum in a controlled way. The results are compared with precisely measured X-ray spectra using a silicon drift detector. Furthermore, this paper shows how the different dose rates in silicon and silicon dioxide layers of an electronic device can be deduced from the simulations

Loss Given Default - Modelle zur Schätzung von Recovery Rates

Loss Given Default (LGD) is a major element for pricing credits and bonds. As there has been a substantial amount of research during the last years, this paper aims to give an overview. Initially, defaults and recovery definitions for credits and the differences to bonds are discussed. A survey of the empirical literature is given, finding average recovery rates for credits between 40% and 87% and lower rates for bonds. A survey of the literature on the influences on LGD showed 17 parameters. Based on these studies we suggest 6 parameters for LGD estimation. Finally an overview of LGD models is given including Standard & Poors and Moody´s KMV. --Loss given default,LGD,recovery,Ausfallschätzung

Desainer Grafis yang Menciptakan dan Menjual Produk Berupa Barang

Graphic designers in their economic activities are more widely known simply as seller of the product in the form of services. Whereas in reality it is not so since the days of Art and Craft movement spearheaded by William Morris at the end of the 19th century. William Morris, a graphic designer, had created products with good design for sale. Many reasons are behind it, starting from desires to break free from pressures of the clients, expanding spaces to express creativity to economic motives. Discussion of graphic designers crossing border of disciplines by creating products is very interesting. They do not just perform the profession on the basis of orders (client-based), but they are able to read the market that will absorb the products they created. Even, they create market trend (as a trendsetter). At this level, a designer does not just make value-added work, but already at the level of creating new value (value creation)