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Effects of noise and parameter deviations in a bichromatic Raman white light cavity

Effects of noise and parameter deviations in a bichromatic Raman white light cavity

We analyze the effects of noise and parameter deviations in a bichromatic Raman type white light cavity, with potential applications in precision measurements. The results show that the dispersion variation induced by parameter deviation can be controlled with an accuracy of 10(-4).
Counterpropagating nematicons in bias-free liquid crystals

Counterpropagating nematicons in bias-free liquid crystals

We experimentally investigate the interaction of two counter-propagating spatial optical solitons (nematicons) in bias-free nematic liquid crystals. We demonstrate the existence of vector solitons composed of two nematicons propagating in opposite directions and analyze their stability versus relative distance and input power.
Coherent control of the Goos-Hanchen shift

Coherent control of the Goos-Hanchen shift

The behavior of the Goos-Hanchen (GH) shifts in the reflected and transmitted light beam which is incident on a cavity containing an intracavity medium of three-level or four-level atoms with electromagnetically induced transparency (EIT) is discussed.
Production of synthetic methionine-free and synthetic methionine-limited alpha casein: Protein foodstuff for patients with homocystinuria due to cystathionine beta-synthase deficiency

Production of synthetic methionine-free and synthetic methionine-limited alpha casein: Protein foodstuff for patients with homocystinuria due to cystathionine beta-synthase deficiency

The aim of this study was to evaluate the possibility that synthetic forms of methionine-free alpha-casein and methionine-limited alpha casein could be produced by recombinant means to form the basis for developing an industrial-scale process for the provision of a foodstuff suitable for patients with homocystinuria due to cystathionine beta-synthase (CBS) deficiency.
Some improved and generalized estimation schemes for clock synchronization of listening nodes in wireless sensor networks

Some improved and generalized estimation schemes for clock synchronization of listening nodes in wireless sensor networks

A sender-receiver paradigm, in which a master and slave node exchange timing packets to estimate the clock offsets of the slave node and other nodes located in the common broadcast region of master and slave nodes, is adopted herein for synchronizing the clocks of individual nodes in a wireless sensor network (WSN).
Fischer-Tropsch synthesis on a model Co/SiO2 catalyst

Fischer-Tropsch synthesis on a model Co/SiO2 catalyst

A model Co/SiO2 catalyst was prepared by depositing cobalt on silica films in ultrahigh vacuum conditions. Fischer-Tropsch synthesis was carried out at a total pressure of carbon monoxide and hydrogen between 0.33 and 1.0 bar.
Effect of the counterrotating terms on polarizability in atom-field interactions

Effect of the counterrotating terms on polarizability in atom-field interactions

The effect of the counterrotating terms on the linear polarizability is investigated, which is responsible for the validity of the optical theorem in all frequency regions. A unitary transformation method [H. Zheng, S. -Y. Zhu, and M. S. Zubairy, Rev. Lett.
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DeSIGN: Guided Practice for Sign Language

DeSIGN: Guided Practice for Sign Language

Children learn and practice their vocabulary through interaction with parents and friends as well as through formal instruction at school. However, for deaf children, sign language is the main...
Calcium channels determine how life begins, and ends
Calcium channels determine how life begins, and ends

Calcium channels determine how life begins, and ends

Ongoing work at Weill Cornell Medical College in Qatar (WCMC-Q) is investigating how intracellular calcium (Ca2+) signaling pathways are involved in the very beginning of life as they prepare the...
Taking gas-to-liquid technology to the next level
Taking gas-to-liquid technology to the next level

Taking gas-to-liquid technology to the next level

In the 1920s, two German scientists—Franz Fischer and Hans Tropsch—developed revolutionary chemical reactions that could transform gas into liquid. These reactions proved particularly...
Researchers build the case for wind and wave studies in Qatar
Researchers build the case for wind and wave studies in Qatar

Researchers build the case for wind and wave studies in Qatar

For the first time, fine detail about the wind and wave conditions around the coast of Qatar has been recorded. By arranging the most sophisticated equipment available on the edge of a 500-meter...
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