Biology in stamps
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چکیده
These three series of UK stamps were issued in (from left to right) 1994, 1991 and 1989, to commemorate modern medical imaging techniques, 150 years since the identification of dinosaurs by Owen and 150 years of the Royal Microscopical Society, respectively. Images courtesy of the Royal Mail.
منابع مشابه
Biologists in stamps
These UK stamps were issued in (clockwise, from top right) 1965, 1982 and 1996, to commemorate the centenary of Joseph Lister's discovery of antiseptic surgery, the centenary of the death of Charles Darwin, and the work of crystallographer Dorothy Hodgkin (who is backed by her model of vitamin B 12). The Hodgkin stamp is one of a series entitled Twentieth Century Women of Achievement, which inc...
متن کاملNobel stamps of approval
The British Post Office has joined Sweden, the US, and other postal services in issuing a commemorative set of stamps to mark the centenary of the first award of the Nobel Prizes in 1901. Sweden and the US are, in fact, issuing a stamp carrying exactly the same design; a profile of Alfred Nobel together with his image on one side of the Nobel Prize medals. But the British Post Office has done s...
متن کاملبهبود الگوریتم تداخل سنجی راداری مبتنی بر پراکنش کننده‌ی دائمی (Stamps) جهت برآورد جابه‌جایی با استفاده از روش پریودوگرام
تکنیک Persistent Scatterer Interferometry (PSI) برای اولین بار بر مبنای انتخاب پیکسل‌های پراکنش کننده‌ی دائمی با رفتار پراکنشی ثابت در زمان و با استفاده از مدل جابه‌جایی از پیش تعیین شده، جهت از بین بردن محدودیت‌های روش سنتی ارائه شد. این تکنیک در سال 2006 تحت عنوان StaMPS ، بهبود پیدا کرد به‌صورتی که بر خلاف تمام الگوریتم‌های PSIارائه شده تا قبل از آن، قابلیت انتخاب پراکنش کننده‌های دائمی را ب...
متن کاملAnalysis of Postage Stamps by Proton-Induced X-Ray Emission Spectrometry
Subtle variations in ink color and paper of postage stamps can affect their value and desirability to collectors and investors. Protoninduced Xray emission spectrometry (PIXE) is a generally nondestructive forensic analysis tool that reveals the concentrations of chemical elements in a sample. PIXE has been used for more than 30 years, sometimes in conjunction with other analytical methods, to ...
متن کاملStamp Verification for Automated Document Authentication
Stamps, along with signatures, can be considered as the most widely used extrinsic security feature in paper documents. In contrast to signatures, however, for stamps little work has been done to automatically verify their authenticity. In this paper, an approach for verification of color stamps is presented. We focus on photocopied stamps as nongenuine stamps. Our previously presented stamp de...
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ورودعنوان ژورنال:
- Current Biology
دوره 7 شماره
صفحات -
تاریخ انتشار 1997