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The modelling of large systems is greatly simplified if their hierarchical decomposition and interconnection structure can be described graphically. The paper describes a system allowing input of block diagrams and continuous zooming to view internal details. Model equations are automatically transformed to assignment statements when possible, allowing efficient explicit integration routines to be
Modern antenna design for communication systems revolves around two extremes: devices, where only a small region is dedicated to antenna design, and base stations, where design space is not shared with other components. Both imply different restrictions on what performance is realizable. In this paper properties of both ends of the spectrum in terms of MIMO performance is investigated. For small a
Background: Numerous different types of variations can occur in DNA and have diverse effects and consequences. The Variation Ontology (VariO) was developed for systematic descriptions of variations and their effects at DNA, RNA and protein levels. Results: VariO use and terms for DNA variations are described in depth. VariO provides systematic names for variation types and detailed descriptions fo
The Arctic is often perceived as the new resource frontier in a resource hungry world. Many actors both inside and outside the region are eager to know what opportunities lie under the ice, and many claim a say in the future development of the Arctic. In Greenland, a national economy based on natural resources will lessen the dependence on the former colonial power Denmark. Many consider this an i
Modern programs make extensive use of reusable software libraries. For example, a study of a number of large Java applications shows that between 17% and 30% of the classes in those applications use container classes defined in the java.util package. Given this extensive code reuse in Java programs, it is important for the interfaces of reusable classes to be well documented. An interface is well
South Africa is a mineral-rich country and one area in which minerals can be very important is catalysis. Over an extended period of time, homogeneous catalysis has grown to become very useful, particularly in the chemical and pharmaceutical industries. The organometallic compounds required in the catalysis industry have advanced from metallocenes to an alternative in the form of α-diimines. Most
Purpose - To offer knowledge about the global development of largescale demand responsive transport systems (DRT), and to stimulate dialogue and collaboration for further innovation and improvement of these systems. Design/methodology/approach - A review of the literature shows how DRT has evolved from the first applications in the 1970s to very complex operations in the last two decades with hund
We present a real-time digital predistortion (DPD) and RF power amplifier (PA) development platform with separate synchronous and coherent RF channels to evaluate multi-input RF PAs with realistic modulated test signals. The platform is based on a Xilinx FPGA and wideband analog frontends to support signal bandwidths up to 312.5 MHz. We describe both the implemented hardware as e.g. DPD core and d
In this study, the upward (IUS) and downward (IDS) slopes of the QRS complex are proposed as indices for quantifying ischemia-induced electrocardiogram (ECG) changes. Using ECG recordings acquired before and during percutaneous transluminal coronary angioplasty (PTCA), it is found that the QRS slopes are considerably less steep during artery occlusion, in particular for IDS. With respect to ischem
Popular Abstract in Swedish Blommor använder färg och doft för att locka till sig pollinatörer. Hur använder sig svärmare av dessa olika signaler för att hitta blomman? För att få svar på denna fråga undersöktes två arter av svärmare, en dagaktiv, Macroglossum stellatarum, och en nattaktiv, Deilephila elpenor. Båda arterna har färgseende och den nattaktiva svärmaren kan skilja på olika färger äveFlowers use different cues to attract pollinators including colour and odour. How do hawkmoths use these cues to find the flowers? This question was investigated in two species of hawkmoth, the diurnal species, Macroglossum stellatarum, and the nocturnal species, Deilephila elpenor. Both species have colour vision and D. elpenor can discriminate colours under very dim light intensities. Both speci
Objectives: Familial Clustering of a disease is an indicator of a possible heritable Cause. provided that environmental sharing can be excluded. Thus. data on familial risks are important For genetic Studies and for clinical genetic counseling. Design: We carried Out a nationwide family study on nontoxic and toxic nodular goiters, and Graves' disease in order to search for familial clustering of t
