Environmental Testing of Caseless Ammunition

Caseless ammunition is subjected to considerable loading both prior to and during use in the weapon. In order to be able to assess the suitability of the ammunition whilst still at the development stage, the types of loading which might occur were analyzed and test methods for their laboratory simulation compiled. A small calibre caseless ammunition developed at ICT was tested on this basis. It was concluded that the simulated loadings had no detrimental effect on the ammunition.     

Empirical rock physics relationships on carbonate dry-frame elastic properties

Laboratory tests were conducted to analyze the ultrasonic velocity response to the pressure change in dry carbonate rocks from the Weyburn oilfield,Canada.Twent...     

Tumorbehandlung mittels Partikeltherapie

Tumor Treatment through Particle Therapy Radiation therapy is used since many decades to treat malicious neoplasms. The ionized beam destroys the genetic construction (DNA) of the cancer cell and prevents further cancer cell division, since the required information is no longer available. The cancer cell dies. The radiation therapy is used only for treatment of local neoplasms (tumor). Metastasizing neoplasms cannot be cured. Especially patients with complicated and deep in the body located neoplasms can be treated, where other conventional radiation therapies do not provide effective results. Infantile cancer types can be treated very gentle to avoid long term side effects. The particles need to be accelerated in a high vacuum environment of < 1*10^‐8 mbar by means of magnets in vacuum tubes and synchrotron apperture up to 75 % of light speed to emit its radioactive dose.     

Purification and structural characterisation of lipid transfer protein from red wine and grapes

Lipid transfer proteins (LTP) play a major role in plant defence and are of particular interest due to their known ability to cause allergic reactions. These proteins are expressed in grapes and also remain detectable after vinification, especially in red wine. However, it remains unknown whether the protein undergoes any changes during the vinification process. Here, we present a purification method for LTPs from Dornfelder grapes and wine. By liquid-chromatography–mass spectroscopy (LC–MS/MS) we identified LTPs from two different species (Vitis vinifera and Vitis aestivalis). Additionally, the purified LTPs were characterised using spectrometric methods, confirming their high purity and structural stability during vinification. We conclude that LTPs are resistant to the alcohol content (13.5 vol%), acidic milieu of wine and other ingredients present during the vinification process, indicating that the allergenic potential of grape LTP is not diminished by the vinification process.     

采用新型焊接电弧提高焊接生产的经济效益和焊缝质量

通过在传统的短路过渡电弧和射流过渡电弧的基础上进行创新,发展新型的焊接电弧,可以显著地提高电弧焊接在金属连接中的优越性。两种新的焊接电弧,forceArc~杂志焊接电弧和coldArc~焊接电弧可以在一个焊接电源上实现,对焊接生产具有现实意义。了解和掌握这些新型电弧的工艺特点,可以有效地将其应用到生产中,以此提高焊接产品的质量和焊接生产的经济效益。新型焊接电弧的出现使现有的有关焊前焊接接头准备的标准和规定,特别是有关坡口角度和焊接位置,需要重新考虑。新型焊接电弧可以应用于各种金属加工工业中的焊接生产,是对弧焊工艺的一个创新。     

Elektronenstrahltesten: Genauigkeit von Zeitmessungen im ps-Bereich

Übersicht Die Entwicklung integrierter Mikrowellenschaltungen für analoge und digitale Anwendungen mit hohen Geschwindigkeiten erfordert neue Meßmethoden. Für die Prozeß- und Schaltungsentwicklung ist vor allem die belastungsfreie Messung interner Signale notwendig. Die bereits bewährte Elektronenstrahlmeßtechnik konnte diesen neuen Anforderungen angepaßt werden. Zeitkritische Größen sind sowohl Signalanstiegszeiten als auch Phasenlagen verschiedener Signale zueinander. Signalanstiegszeiten können gegenwärtig bis herab zu 15 ps mit einem Fehler unter 10% gemessen werden. Für Messungen von Phasenlagen zwischen Signalen, die innerhalb von 3 Stunden aufgezeichnet wurden, ergibt sich eine Genauigkeit von±2 ps.

---

Electron-beam testing: accuracy of time measurements in the ps range

Contents The development of integrated microwave circuits for analogue and digital applications with higher speeds requires new testing methods. The process and circuit development primarily require non loding measurements of internal signals. The adaptation of the proven technique of e-beam testing to these new requirements was successfull. Signal rise times as well as phase relations between different signals are critical quantities in the time scale. Presently, rise times can be measured down to 15 ps with an error of less than 10%. Measurements between signals being recorded within 3 hours are possible with an accuracy of±2 ps.