Tomato: a crop species amenable to improvement by cellular and molecular methods

Tomato is a crop plant with a relatively small DNA content per haploid genome and a well developed genetics. Plant regeneration from explants and protoplasts is feasable which led to the development of efficient transformation procedures. In view of the current data, the isolation of useful mutants at the cellular level probably will be of limited value in the genetic improvement of tomato. Protoplast fusion may lead to novel combinations of organelle and nuclear DNA (cybrids), whereas this technique also provides a means of introducing genetic information from alien species into tomato. Important developments have come from molecular approaches. Following the construction of an RFLP map, these RFLP markers can be used in tomato to tag quantitative traits bred in from related species. Both RFLP's and transposons are in the process of being used to clone desired genes for which no gene products are known. Cloned genes can be introduced and potentially improve specific properties of tomato especially those controlled by single genes. Recent results suggest that, in principle, phenotypic mutants can be created for cloned and characterized genes and will prove their value in further improving the cultivated tomato.

256x256 pixel CMOS imager with linear readout and 120dB dynamic range

In this contribution, a 256x256 pixel CMOS imager is described, which features linear readout, 120dB dynamic range (DR), 56dB signal-to-noise ratio, 65% filling factor, and an effective frame rate of 50 Hz. The imager has been integrated in 1µm double-metal CMOS technology. Sample images exhibiting high DR are presented and compared to those taken with a conventional CCD imager

Design and performance of a 10 MHz cmos analog pipeline

The development of an analog pipeline which will be used for the readout of the ZEUS high-resolution calorimeter is described. The pipeline will be built in CMOS-technology and will use the switched capacitor technique. Performance tests of a test chip which incorporates the main features of the pipeline are presented. The following results on the main parameters have been achieved: dynamic range about 8000:1, chargeup time better than 4 ns, timing accuracy better than 1 ns. First results on radiation sensitivity show that the chip operates properly up to 5 krad. On the basis of these results an improved design of a prototype chip has been started

Ein hochsprachenprogrammierbares System zur Vollbildauswertung im Videotakt, Anwendungen zur Interpretation monokularer, semi-strukturierter Bildfolgen bei natürlicher Beleuchtung und schnell bewegter Kamera

Im vorliegenden Beitrag wird ein hochsprachenprogrammierbares System zur schritthaltenden Vollbild-Interpretation natürlich beleuchteter Szenenfolgen im Videotakt vorgestellt. Im einzelnen werden folgende Teilmodule und Subsysteme beschrieben: eine hochdynamische, pixellokal autoadaptive CMOS-Kamera mit ca. 120 dB Helligkeitsdynamik (20Bits/Pixel), ein hochsprachenprogrammierbarer Systolic Array Prozessor (für die pixelbezogenen Verarbeitungsmodule) im PCI-Kartenformat, samt optimierendem Compiler, Simulator und Emulator, Systemprozeßgerüste unter Linux auf den für die Echtzeit-Anwendungen eingesetzten Hostrechnern (z.B. DEC/Alpha oder Intel/Pentium), eine prototypische Anwendung zur bildverarbeitungsbasierten Eigenbewegungsbeobachtung (Translationsrichtung, Rotationsraten), eine prototypische, automotive Anwendung zur schritthaltenden Detektion und Kartierung des Straßen- und Spurverlaufs unter partieller monokularer 3D-Rekonstruktion, sowie prototypische Anwendungen zur Klassifikatio n verkehrsrelevanter Hindernisse (Verkehrsteilnehmer)