منابع مشابه
Constraints on the wing morphology of pterosaurs.
Animals that fly must be able to do so over a huge range of aerodynamic conditions, determined by weather, wind speed and the nature of their environment. No single parameter can be used to determine-let alone measure-optimum flight performance as it relates to wing shape. Reconstructing the wings of the extinct pterosaurs has therefore proved especially problematic: these Mesozoic flying repti...
متن کاملSexual dimorphism in the wing shape and size of the carob moth, Ectomyelois ceratoniae (Lepidoptera: Pyralidae)
پروانه‌ی کرم گلوگاه انار، Ectomyelois ceratoniae (Zeller) ، به خانواده‌ی Pyralidae و زیر خانواده‌ی Phycitinae تعلق دارد. علیرغم وجود شواهدی دال بر وجود اختلاف شکل و اندازه در جنس‌های نر و ماده‌ی بسیاری از پروانه‌ها و همچنین در اعضای این خانواده، وجود چنین اختلافی تاکنون در گونه‌ی مورد بحث گزارش نشده است. در تحقیق حاضر، دوشکلی جنسی در اندازه و شکل بال پروانه‌ی کرم گلوگاه انار روی چهار میزبان انا...
متن کاملThe Bible and Pterosaurs
There is an increasing amount of archaeological and linguistic evidence that pterosaurs (flying reptiles) were mentioned by several authors of Scripture. This introductory article will deal with some of those biblical words and what I've learned about them from word studies and archaeology. The scientific basis for this study has been established by articles for peer-reviewed scientific publica...
متن کاملQuantitative genetics: Resolving wing shape genes
Recent high-resolution quantitative mapping experiments aimed at elucidating the genetics of natural variation for wing shape in fruit-flies suggest that very many genes can subtly influence the trait.
متن کاملWing Shape Sensing from Measured Strain
A new two-step theory is investigated for predicting the deflection and slope of an entire structure using strain measurements at discrete locations. In the first step, a measured strain is fitted using a piecewise least-squares curve fitting method together with the cubic spline technique. These fitted strains are integrated twice to obtain deflection data along the fibers. In the second step,...
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ژورنال
عنوان ژورنال: Nature
سال: 1995
ISSN: 0028-0836,1476-4687
DOI: 10.1038/374316a0