ketab-ol-ein, which was written by ahmad farahidi, is one of the oldest dictionaries that exist today. in the preliminary discussion we mentioned that, although historical sources show that the work of ibn abbas looks like a dictionary, it is becoming accepted that ketab-ol-ein is the first dictionary. the article starts with explanations about the life and work of khalilibn ahmad. we have also...

There is variability in the Mg isotopic composition that is a reflection of the widespread heterogeneity in the isotopic composition of the elements in the solar system at approximately 100 ppm. Measurements on a single calcium-aluminum-rich inclusion (CAI) gave a good correlation of Mg ⁄ Mg with Al ⁄ Mg, yielding an isochron corresponding to an initial (Al ⁄ Al)o = (5.27 ± 0.18) · 10 and an in...

Precipitation strengthening is investigated in binary Al–0.1Sc, Al–0.1Zr and ternary Al–0.1Sc–0.1Zr (at.%) alloys aged isochronally between 200 and 600 C. Precipitation of Al3Sc (L12) commences between 200 and 250 C in Al–0.1Sc, reaching a 670 MPa peak microhardness at 325 C. For Al–0.1Zr, precipitation of Al3Zr (L12) initiates between 350 and 375 C, resulting in a 420 MPa peak microhardness at...

We present the Hamburg/RASS Catalogue (HRC) of optical identifications of X-ray sources at highgalactic latitude. The HRC includes all X-ray sources from the ROSAT Bright Source Catalogue (RASS-BSC) with galactic latitude |b| ≥ 30◦ and declination δ ≥ 0◦. In this part of the sky covering∼10 000 deg the RASS-BSC contains 5341 X-ray sources. For the optical identification we used blue Schmidt pri...

This paper describes the conversion into LMF, a standard lexicographic digital format of ’al-qāmūs al-muh. īt . , a Medieval Arabic lexicon. The lexicon is first described, then all the steps required for the conversion are illustrated. The work is will produce a useful lexicographic resource for Arabic NLP, but is also interesting per se, to study the implications of adapting the LMF model to ...

the present article studies the different aspects of paris in the lebanese novel in general and in suhayl idris’s al-hayy al-latini in particular as a sample. this study examines the protagonist and al-idrisi’s views of paris as a beautiful western city and as one of the symbols of civilization and culture in modern arabic literature. whether the world is considered to be a psychological model ...

In this research work, the possibility of semi industrial production of Al-TiB2 and Al-ZrB2 composites, using reactive slag in a flame furnace have been investigated. For this purpose, commercial pure aluminum and powder mixture of TiO2 (ZrO2) , KBF4 and Na3AlF6 were used. The results showed that using a proper ratio of slag forming materials as well as proper amounts of the above-mentioned com...

In this research work, the possibility of semi industrial production of Al-TiB2 and Al-ZrB2 composites, using reactive slag in a flame furnace have been investigated. For this purpose, commercial pure aluminum and powder mixture of TiO2 (ZrO2) , KBF4 and Na3AlF6 were used. The results showed that using a proper ratio of slag forming materials as well as proper amounts of the above-mentioned com...

Magnetoresistance and rectification are two fundamental physical properties of heterojunctions and respectively have wide applications in spintronics devices. Being different from the well known various magnetoresistance effects, here we report a brand new large magnetoresistance that can be regarded as rectification magnetoresistance: the application of a pure small sinusoidal alternating-curr...