Ueber Apparate zum Erhitzen von Substanzen unter Druck

Ohne Zusammenfassung     

Als Urmaass bei der Acidimetrie und Alkalimetrie

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CDMA/HDR: a bandwidth efficient high speed wireless data servicefor nomadic users

This article presents an approach to providing very high-data-rate downstream Internet access by nomadic users within the current CDMA physical layer architecture. A means for considerably increasing the throughput by optimizing packet data protocols and by other network and coding techniques are presented and supported by simulations and laboratory measurements. The network architecture, based on Internet protocols adapted to the mobile environment, is described, followed by a discussion of economic considerations in comparison to cable and DSL services     

1,4-Diaryl and Schiff's base [1,2,3]-triazole derivative liquid crystalline compounds

Regioselective synthesis of [1,2,3]-triazoles based on the 'click-reaction', involving the Cu(I)-catalysed 1,3-dipolar cycloaddition of aryl azide to terminal arylacetylenes, was successfully employed in the preparation of two series of non-linear mesogens, based on 1,4-diaryl-[1,2,3]-triazole (Ia-e) and with Schiff's base units (IIa-c). Their mesophases were characterized by polarizing optical microscopy and differential scanning calorimetry. All final compounds exhibited preferentially the SmC phase. In addition, compounds of series I showed weak blue fluorescence in solution (λ_{max. em.} = 380-386 nm) with poor quantum yields and a Stokes shift of around 90 nm.     

Techniques for Reducing the Number of Decisions and Backtracks in Combinational Test Generation

Combinational test pattern generation (TPG) is basically a search in a finite state space. In general, the search is performed in a branch-and-bound fashion. The branch-and-bound search builds a decision tree using two basic operations: decision making and backtracking. The size of the decision tree, and hence the efficiency of the branch-and-bound search, is directly dependent on the number of decisions made. This paper proposes a set of novel techniques for reducing the number of decisions and the size of the decision space. These techniques work directly on the maximum number of potential ways of justifying a given logical assignment. This maximum number is reduced by exploiting the properties of prime-and-irredundant covers. These same properties are also used to reduce the number of backtracks by implying a maximum number of necessary assignments. The reduction of the number of decisions and the identification of a maximum of necessary assignments make the proposed TPG method highly efficient as demonstrated by experimental results. This paper also proposes a novel combination of prime-and-irredundant cover extraction and transitive closure computation for a more efficient TPG process.     

Iron-Containing Adsorbents in Great Nile Sediments

Hyperfine Interactions - A sample from the Great Nile (near Khartoum) has been investigated by Mössbauer spectroscopy, infrared spectroscopy, analytical electron transmission microscopy, and...     

Guest Editors' Introduction

Journal of Signal Processing Systems -