Photograph of the Nebul M. 77 Ceti

The anomalous Cepheid XZ Ceti

Aims. XZ Ceti is the only known anomalous Cepheid in the Galactic field. Being the nearest and brightest such variable star, a detailed study of XZ Ceti may shed light on the behaviour of anomalous Cepheids whose representatives have been mostly detected in external galaxies. Methods. CCD photometric and radial velocity observations have been obtained. The actual period and amplitude of pulsati...

A Musical Photograph?

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

M , OF MOLECULAR GAS IN THE HOST GALAXY OF THE z p 5 . 77 SDSS QUASAR

We have detected emission by the CO(5–4) and (6–5) rotational transitions at from the z p 5.7722 0.0006 host galaxy of the SDSS quasar J0927 2001 using the Plateau de Bure Interferometer. The peak line flux density for the CO(5–4) line is mJy, with a line FWHM p 610 110 km s . The implied molecular gas 1 0.72 0.09 mass is M . We also detect the 90 GHz continuum at mJy, consistent with a 10 (1.6...

romantic education:reading william wordsworths the prelude in the light of the history of ideas

عصر روشنگری زمان شکل گیری ایده های مدرن تربیتی- آموزشی بود اما تاکید بیش از اندازه ی دوشاخه مهم فلسفی زمان یعنی عقل گرایی و حس گرایی بر دقت و وضوح، انسان عصر روشنگری را نسبت به دیگر تواناییهایش نابینا کرده و موجب به وجود آمدن افرادی تک بعدی شد که افتخارعقلانیتشان، تاکید شان بر تجربه فردی، به مبارزه طلبیدن منطق نیاکانشان وافسون زدایی شان از دنیا وتمام آنچه با حواس پنجگانه قابل درک نبوده و یا در ...