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نیازهای جوامع بشری و صنعت برای ساخت سازههایی با وزن کم، استحکام و دوام بالا، موجب افزایش تقاضا برای مواد کامپوزیتی، از جمله ساختارهای ساندویچی شده است. در این میان پانلهای ساندویچی در موقعیتهایی که نیاز به استحکام مکانیکی بالا، وزن کم، خاصیت عایق صدا و عایق حرارتی باشد، استفاده میشوند. در این تحقیق پانلهای ساندویچی کامپوزیتی با طرح لانهزنبوری، تقویت شده با نانو لولههایکربنی با استفاد...
ar X iv : h ep - t h / 96 07 17 2 v 1 2 2 Ju l 1 99 6 Gaugino condensation and the anomalous U ( 1 )
We study gaugino condensation in presence of an anomalous U(1) gauge group and find that global supersymmetry is dynamically broken. An example of particular interest is provided by effective string models with 4dimensional Green-Schwarz anomaly cancellation mechanism. The structure of the hidden sector is constrained by the anomaly cancellation conditions and the scale of gaugino condensation ...
That alcohol provides a benefit to creative processes has long been assumed by popular culture, but to date has not been tested. The current experiment tested the effects of moderate alcohol intoxication on a common creative problem solving task, the Remote Associates Test (RAT). Individuals were brought to a blood alcohol content of approximately .075, and, after reaching peak intoxication, co...
Properties of the 11 084 874 829 Steiner triple systems of order 19 are examined. In particular, there is exactly one 5-sparse, but no 6-sparse, STS(19); there is exactly one uniform STS(19); there are exactly two STS(19) with no almost parallel classes; all STS(19) have chromatic number 3; all have chromatic index 10, except for 4 075 designs with chromatic index 11 and two with chromatic inde...
The carcinogenicity of N-( 5-Nitro-2-furfurylidene )-1-aminohydan to in (nitrofurantoin, NF-153) was examined in (C57BL/6N x DBA/2N)F1 (BDF1) mice. Three hundred of mice were divided into three groups, each group consisting about 50 male and 50 female mice. Nitrofurantoin was given in powdered diet at dose levels of 0. 3, 0. 075, or 0 % to the respestive group of mice. The overall incidence of ...
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