Correlation between domain wall properties and material parameters in amorphous SmCo-films

Amorphous Sm1-xcox-films with uniaxial in-plane anisotropy with various Co-concentrationsx (.67 leq x leq .91)and various film thicknesses d (10nm leq d leq 350nm) have been prepared by flash-evaporation of SmCo-alloy powders. The saturation magnetization decreases linearly with x in the whole concentration range, whereas the coercive field increases linearly with x down toxapprox74and then decreases. Drastic changes in all magnetic properties occur when at a given chemical composition the film thickness is reduced belowdapprox50nm. Head-on domains are separated by zig-zag walls whose amplitudes are analyzed as a function of the material parameters.     

Leakage of relevant information to innocent examinees in the GKT: An attempt to reduce false-positive outcomes by introducing target stimuli.

This study focused on the Guilty Knowledge Test (GKT)—a psychophysiological detection method based on a series of multiple-choice questions, each having one relevant and several neutral (control) alternatives. The study examined a new method designed to reduce false-positive outcomes due to leakage of relevant items to innocent suspects by introducing target items (i.e., items known to all examinees but unrelated to the crime) to which participants have to respond (e.g., by pressing a key) while answering the GKT questions. Informed innocent participants showed relatively larger electrodermal responses to the critical items than uninformed participants, but not as large as the responses made by guilty participants. No differences between informed and uninformed innocent participants were obtained with a respiration measure. The use of the target items tended to reduce the differences between informed and uninformed innocent participants. The results further demonstrated that electrodermal responding to the relevant items was correlated with memory of these items. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A proposal for future data organization in enterprise systems—an analysis of established database approaches

The digital transformation sets new requirements to all classes of enterprise systems in companies. ERP systems in particular, which represent the dominant class of enterprise systems, are struggling to meet the new requirements at all levels of the architecture. Therefore, there is an urgent need to reconsider the overall architecture of the systems and address the root of the related issues. Given that many restrictions ERP pose on their adaptability are related to the standardization of data, the database layer of ERP systems is addressed. Since database serve as the foundation for data storage and retrieval, they limit the flexibility of enterprise systems and the chance to adapt to new requirements accordingly. So far, relational databases are widely used. Using a systematic literature approach, recent requirements for ERP systems were identified. Prominent database approaches were assessed against the 23 requirements identified. The results reveal the strengths and weaknesses of recent database approaches. To this end, the results highlight the demand to combine multiple database approaches to fulfill recent business requirements. From a conceptual point of view, this paper supports the idea of federated databases which are interoperable to fulfill future requirements and support business operation. This research forms the basis for renewal of the current generation of ERP systems and proposes to ERP vendors to use different database concepts in the future.

     

The magnetic properties of amorphous SmCo-films

The room temperature magnetic hysteresis properties of flash-evaporated Sm1-xCox-films (x=0.74, 0.82,0.89) with induced uniaxial in-plane anisotropy have been analyzed for their dependence on the substrate material (glass,Cu,Al) and the substrate temperature Tsubpresent during evaporation (100Ksub<1000K).     

Coplanar-waveguide test fixture for characterisation of high-speed digital circuits up to 40 Gbit/s

For the characterisation of high-speed digital ICs, the standard test fixtures or test boards are usually realised with the microstripline configuration. The input and output impedance of the signal ports are well matched to 50 Omega . Because of dispersion, mutual coupling and reflections at taper sections, which are necessary to produce a change in linewidth in the region where the device is bonded into the test circuit, the performance is limited to the lower gigahertz region. To overcome most of these problems many investigations are being carried out using coplanar-waveguide (CPW) structures. The authors demonstrate the advantage of CPW lines and describe a successful design of a CPW test fixture with low dispersion, a minimum of crosstalk and low reflections suitable for data rates up to 40 Gbit/s.<>     

A simple broad-band device de-embedding method using an automaticnetwork analyzer with time-domain option

A simple method for de-embedding S parameters of devices in microstrip is presented. The use of only one transmission line and two nonideal shorts or opens of different lengths as calibration standards allows the determination of the unknown S parameters of the connectors and the complex propagation coefficient of the lines