منابع مشابه
OFDM: An Old Idea Solves New Problems
The multicarrier technique is known since more than 40 years. First practical applications, however, were not considered before 1990 when Bingham’s famous paper appeared which pointed out the great attraction of this idea – especially in the form of the FFT-based ”OFDM” (Orthogonal Frequency Division Multiplexing). Meanwhile, OFDM is applied in the DAB and DVB standard (Digital Audio/Video Broa...
متن کاملA New Look at an Old Idea
Traditionally, most cases of hypertension in children and adolescents have been attributed to secondary causes, with renal and cardiac disorders being the most common, at least in preadolescent children. However, most hypertensive adolescents have no identifiable underlying cause for their hypertension, perhaps with the exception of obese adolescents, in whom the hypertension is likely attribut...
متن کاملAn old idea for a new age.
To purchase electronic or print reprints, contact The InnoVision Group, 101 Columbia, Aliso Viejo, CA 92656. Phone, (800) 809-2273 or (949) 362-2050 (ext 532); fax, (949) 362-2049; e-mail, [email protected]. By Kathleen Dracup, RN, DNSc, and Christopher W. Bryan-Brown, MD. From the School of Nursing, University of California, San Francisco, San Francisco, Calif (KD) and the Department of Anesth...
متن کاملA fish hook and liver disease: revisiting an old enemy.
Vibrio vulnificus is an uncommon but potentially devastating pathogen. Early recognition with prompt antimicrobial therapy and surgical treatment are key factors for a favorable outcome. Patients with diseases of the liver represent the group at highest risk of infection. However, clinicians are often unaware of underlying liver disease in these patients at the time of presentation. We present ...
متن کاملAn Extension of Mixed Sky-hook and ADD to Magneto-Rheological Dampers
The paper presents an extension of the mixed Sky-hook and ADD to MagnetoRheological dampers. Firstly, a semi-active automotive suspension equipped with a nonlinear Magneto-Rheological damper is introduced. The interest of this nonlinear model is that the bi-viscous and hysteretic behaviors of MR dampers can be taken into account in the controller design. Hence, the designed controller is more a...
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ژورنال
عنوان ژورنال: Science
سال: 1967
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.158.3803.946