(Non-)Monumental Layers of Berlin

Topologically non-trivial quantum layers

Given a complete non-compact surface Σ embedded in R, we consider the Dirichlet Laplacian in the layer Ω that is defined as a tubular neighbourhood of constant width about Σ. Using an intrinsic approach to the geometry of Ω, we generalise the spectral results of the original paper [1] by Duclos et al. to the situation when Σ does not possess poles. This enables us to consider topologically more...

Layers and non-functional patterns

We consider the use of a hierarchically layered architecture for object-oriented systems and we look at the specification of security or other nonfunctional aspects of the system as a set of local level specifications. These specifications are realized using patterns. The enforcement of the constraints defined at a high level is performed through mappings to the lower levels. This approach is t...

Melting Pots: Berlin Digital meets Berlin Culture

Forming, storming, norming and performing [1] – a well-known phase-modulation model of team building is probably reliable to describe the changeful relationship of Berlin Cultural and Berlin Digital in the Melting Pot of the metropolis. The pretty, shy bride awkwardly meets a nerdy, hyperactive groom when after the fall of the Berlin wall on November 9th, 1989, the wedding looms on the horizon:...

A radiographic survey of monumental masonry workers in Aberdeen.

commuting and non -commuting graphs of finit groups

فرض کنیمg یک گروه غیر آبلی متناهی باشد . گراف جابجایی g که با نماد نمایش داده می شود ،گرافی است ساده با مجموعه رئوس که در آن دو راس با یک یال به هم وصل می شوند اگر و تنها اگر . مکمل گراف جابجایی g راگراف نا جابجایی g می نامیم.و با نماد نشان می دهیم. گرافهای جابجایی و ناجابجایی یک گروه متناهی ،اولین بار توسطاردوش1 مطرح گردید ،ولی در سالهای اخیر به طور مفصل در مورد بحث و بررسی قرار گرفتند . در ،م...