Classic Study Designs: Reasons to Look Further

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Classic Spotlight: Look, Max-No Math Required!

In 1952, Joshua and Esther Lederberg published a paper in the Journal of Bacteriology (1) that fully legitimized bacteria as genetic organisms, no different in principle from pea plants or fruit flies. In all cases, mutations are precipitous events that can generate stepwise changes in phenotype. The Lederbergs’ report first described the method of replica plating, now a venerable microbiologic...

متن کامل

A further look into combinatorial orthogonality

Strongly quadrangular matrices have been introduced in the study of the combinatorial properties of unitary matrices. It is known that if a (0, 1)-matrix supports a unitary then it is strongly quadrangular. However, the converse is not necessarily true. In this paper, we fully classify strongly quadrangular matrices up to degree 5. We prove that the smallest strongly quadrangular matrices which...

متن کامل

A Classic Look at Systems Engineering by Robert A . Frosch

Before his term as NASA Administrator, Bob Frosch was an assistant secretary of the U.S. Navy in charge of research, development, test and evaluation of Navy programs. In that capacity, he delivered a controversial and well remembered speech to the IEEE Group on Aerospace and Electronic Systems during IEEE's international convention in New York on March 26, 1969. Edited portions of that famous ...

متن کامل

Top 10 Reasons for using Ultracapacitors in your system designs

Global Headquarters 5271 Viewridge Court, Suite 100 San Diego, CA 92123 USA Phone: +1 858 503 3300 Fax: +1 858 503 3301 Maxwell Technologies SA CH-1728 Rossens Switzerland Phone: +41 (0)26 411 85 00 Fax: +41 (0)26 411 85 05 Maxwell Technologies GmbH Brucker Strasse 21 D-82205 Gilching Germany Phone: +49 (0)8105 24 16 10 Fax: +49 (0)8105 24 16 19 Maxwell Technologies, Inc. Shanghai Representativ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: American Journal of Epidemiology

سال: 2006

ISSN: 1476-6256,0002-9262

DOI: 10.1093/aje/163.suppl_11.s246-c