When water does not clear the smut from the smoke

Does the Smoke Ever Really Clear? Thirdhand Smoke Exposure Raises New Concerns

the effect of traffic density on the accident externality from driving the case study of tehran

در این پژوهش به بررسی اثر افزایش ترافیک بر روی تعداد تصادفات پرداخته شده است. به این منظور 30 تقاطع در شهر تهران بطور تصادفی انتخاب گردید و تعداد تصادفات ماهیانه در این تقاطعات در طول سالهای 89-90 از سازمان کنترل ترافیک شهر تهران استخراج گردید و با استفاده از مدل داده های تابلویی و نرم افزار eviews مدل خطی و درجه دوم تخمین زده شد و در نهایت این نتیجه حاصل شد که تقاطعات پر ترافیک تر تعداد تصادفا...

When the extension property does not hold

A complete extension theorem for linear codes over a module alphabet and the symmetrized weight composition is proved. It is shown that an extension property with respect to arbitrary weight function does not hold for module alphabets with a noncyclic socle.

Worms Clear the Smoke Surrounding Nicotine Addiction

In this issue of Cell, Feng et al. report a worm model of nicotine dependence that shows behavioral adaptations surprisingly similar to those in humans. These authors show a critical link between nicotinic receptors and TRP channels, which may represent a new therapeutic target for treating nicotine addiction.

When tabling does not work

Tabled execution has been successfully applied in various domains such as program analysis, model checking, parsing, . . . A recent target of tabling is the optimization of Inductive Logic Programming. Due to the iterative nature of ILP algorithms, queries evaluated by these algorithms typically show a lot of similarity. To avoid repeated execution of identical parts of queries, answers to the ...