نتایج جستجو برای: geochemical indicator
تعداد نتایج: 87188 فیلتر نتایج به سال:
Paper presents scientometry as a science and a fundamental instrument for determining the international value of an university as well as for the statistical evaluation of scientific research results. The impact of the research measurable through scientometric indicators is analyzed. Promoting the scientific production of universities through institutional digital repositories deals with the co...
Mouse head-fixed behaviour coupled with functional imaging has become a powerful technique in rodent systems neuroscience. However, training mice can be time consuming and is potentially stressful for animals. Here we report a fully automated, open source, self-initiated head-fixation system for mesoscopic functional imaging in mice. The system supports five mice at a time and requires minimal ...
An index is proposed that is based on the h-index and a 3-year publication/citation window. When updated regularly, it shows the current scientific performance of researchers rather than their life-time achievement as indicated by common scientometric indicators. In this respect, the new rating scheme resembles established sports ratings such as in chess or tennis. By the example of ACM SIGMOD ...

 In the Northern iron-ore district of Kryvbas basin, mining deposits poor magnetic ores is underway in two quarries – Pervomaiskyi and Hannivsky. Oftentimes, their mine contours contain low-valuable or unusable magnetite-silicaceous quarzites containing ferrous slate horizons. As a result, excavated ore mass contains partly rocks various mineral chemical compositions physical technical pr...
anomaly recognition has always been a prominent subject in preliminary geochemical explorations. among the regional geochemical data processing, there are a range of statistical and data mining techniques as well as different mapping methods, which serve as presentations of the outputs. the outlier’s values are of interest in the investigations where data are gathered under controlled condition...
Iranian Cenozoic magmatic belt, known as Urumieh-Dokhtar, is recognized as an important polymetallic mineralization which hosts porphyry, epithermal, and polymetallic skarn deposits. In this regard, multivariate analyses are generally used to extract significant anomalous geochemical signature of the mineral deposits. In this study, stepwise factor analysis, cluster analysis, and concentration–...
Widespread orogenesis associated with supercontinent assembly generates extensive collisional mountain chains high elevations that are crucial for modulating the interaction between atmosphere and lithosphere. However, not all supercontinents formed over Earth's history shared same topography. This study investigates temporal variation last 1.5 Ga in La/Zr ratio of continental-arc mafic volcani...
background: social health is important to be assessed as a dimension of health. in this study we tried to determine areas and sub-areas of children social health indicators. methods: in a structured way, we reviewed the main social health databases and documents since 1995, both iranian and international were reviewed to develop conceptual framework and to extract indicators. results: accor...
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