نتایج جستجو برای: zink
تعداد نتایج: 597 فیلتر نتایج به سال:
Experimental investigation of homogeneous freezing of sulphuric acid particles in the aerosol chamber AIDA O. Möhler, O. Stetzer, S. Schaefers, C. Linke, M. Schnaiter, R. Tiede, H. Saathoff, M. Krämer, A. Mangold, P. Budz, P. Zink, J. Schreiner, K. Mauersberger, W. Haag, B. Kärcher, and U. Schurath Forschungszentrum Karlsruhe, Institute of Meteorology and Climate Research, Karlsruhe, Germany Fo...
In this paper, we construct new sequences of asymptotically good convolutional codes (AGCC). These sequences are obtained from sequences of transitive, self-orthogonal and self-dual algebraic geometry (AG) codes attaining the Tsfasman-Vladut-Zink bound. Furthermore, by applying the techniques of expanding, extending, puncturing, direct sum, the 〈u|u+ v〉 construction and the product code constru...
For a prime power q, let αq be the standard function in the asymptotic theory of codes, that is, αq(δ) is the largest asymptotic information rate that can be achieved for a given asymptotic relative minimum distance δ of q-ary codes. In recent years the Tsfasman-Vlăduţ-Zink lower bound on αq(δ) was improved by Elkies, Xing, and Niederreiter and Özbudak. In this paper we show further improvement...
بررسی میزان فلزات (کادمیوم، سرب، روی، مس، کروم، نیکل) در بعضی از انواع سرمه های موجود در بازار ایران
Background and purpose: Exposure to heavy metals can cause neurological, respiratory and cardiovascular disorders, imbalance of hormones, hair loss, infertility, and abortion. Kohl containing heavy metals can lead to such complications due to long-term contact with the lining of the eye. The aim of this study was to investigate the contamination level of Kohl by heavy metals (cadmium, zinc, nic...
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