Differential phase extraction in an atom gradiometer

Differential phase extraction in an atom gradiometer

an exploratory study of differential item functioning (dif) in efl reading comprehension

بررسی دلایل عملکرد متفاوت سوالات آزمون درک مطلب به زبان خارجی تاریخچه ی تحقیق درباره ی منابع عملکرد مختلف سوالات (دیف) در آزمون درک مطلب پر است از مجموعه ای از متغیرهای فرضیه ای که چند مورد از مهمترین آنها عبارتند از: جنسیت، آشنایی با موضوع متن، علاقه به موضوع یا محتوای متن، حدس زدن، و عوامل بافت اجتماعی (پی 2004؛ زومبو و گلین 2005). مطالعه حاضر با استناد به فلسفه ی انکارپذیری پوپر عوامل ذکر...

Measurement of the Earth’s Gravity Gradient with an Atom Interferometer-Based Gravity Gradiometer

Measurement of the gradient of gravitational fields has important scientific and technical applications. These applications range from measurement of G, the gravitational constant, and tests of general relativity [1,2] to covert navigation, underground structure detection, oil-well logging, and geodesy [3]. This Letter describes the development of a gravity gradiometer whose operation is based ...

Atom interferometry gravity-gradiometer for the determination of the Newtonian gravitational constant G

We developed a gravity-gradiometer based on atom interferometry for the determination of the Newtonian gravitational constant G. The apparatus, combining a Rb fountain, Raman interferometry and a juggling scheme for fast launch of two atomic clouds, was specifically designed to reduce possible systematic effects. We present instrument performances and show that the sensor is able to detect the ...

acute phase proteins efficacy in differential diagnosis

introduction: evaluating patient with acute scrotum is based on medical history (e.g. age), physical examination, blood tests, urine analysis and imaging studies. differential diagnosis may be difficult. efficacy of serum acute phase proteins in patients with acute scrotum was assessed in this study. materials and methods : 45 patients were recruited and allocated within three sub-groups; acute...