We review different methods for simulating credit migrations in a nonparametric and discrete or continuous-time Markov chain framework. We suggest the application of a factor model approach in combination with the use of copulas for the joint dynamics of credit rating changes. While there are several applications of copulas in credit risk for modeling joint defaults, it lacks of the same intere...

While a country is surging ahead from a developing country to the status of a developed nation, the term "Development" has a connotation, both in terms of macro-level or micro-level development. When referred at the country level it becomes macro-level development, while at districts, it becomes microlevel development. At the sub-state level, “District” is the basic unit for all administrative ...

In a dynamic, information and technology-driven society, librarians can create new roles by assessing changes in their environment, the potential effect and ways to reposition themselves. Scenario building, literature reviews, situation analysis, speculation and forecasting may be used. Librarians have a good idea of what they can offer, but are often unable to reposition themselves in time. Re...

background: the number of people aged 60 and older is increasing faster than other age groups worldwide. iran will experience a sharp aging population increase in the next decades, and this will pose new challenges to the healthcare system. since providing high quality aged-care services would be the major concern of the policymakers, this question arises that what types of aged care services s...

In this paper, results of DNAPL spreading experiments carried out in a geocentrifuge are analysed. The experiments are performed in the GeoDelft geocentrifuge. The experiments investigate the intrusion of a known amount of PCE into a water-saturated soil sample. They are carried out under 12, 15, and 30g conditions. The objectives of these experiments were to assess the potential of geocentrifu...

Safety analysis in gas process facilities is necessary to prevent unwanted events that may cause catastrophic accidents. Accident scenario analysis with probability updating is the key to dynamic safety analysis. Although conventional failure assessment techniques such as fault tree (FT) have been used effectively for this purpose, they suffer severe limitations of static structure and uncertai...

english) The main scope of this thesis work is to compare theoretical models with experimental observations on particle transport in particular regimes of plasma operation from the Tokamak à Configuration Variable (TCV) located at CRPP–EPFL in Lausanne. We introduce the main topics in Tokamak fusion research and the challenging problems in the first Chapter. A particular attention is devoted to...