The focus of this chapter is in the problem of using technology to grant access to restricted areas by authorised persons, hereafter called ‘clients’, and to deny access to unauthorised or unidentified persons, the so called ‘impostors’. Conventional methods, such as magnetic or smart cards, user/password login and others, are being progressively recognised as insecure due to their many shortco...

Abstrak —Perhiasan telah dikenal oleh manusia sejak zaman prasejarah yang terbuat dari batu-batuan maupun tulang hewan. Perhiasan tidak hanya memiliki fungsi estetis, melainkan juga status sosial bagi pemakainya. Seiring dengan berkembangnya peradaban manusia, teknologi pengolahan perhiasan mengalami kemajuan segi pembuatannya salah satunya ditemukannya teknik pengerjaan logam. Salah satu logam...

I considered snapping a picture on my camera phone of the Dunkin’ Donuts sign at the Tegucigalpa airport, marveling at how American culture had managed to spread its tentacles all the way to Honduras. As we loaded our luggage into six enormous pickup trucks, 10 percent personal belongings and 90 percent supplies for our brigades, I waited for the moment when it became clear that I had entered t...

MADAM, Amalgam tattoo is the most common exogenous pigmentation of the oral mucosa; surprisingly, there are no reports of similar lesions on the skin. It is caused by traumatic implantation of amalgam fragments into the oral mucosa following dental treatment, particularly when amalgam fillings are removed with high-speed instruments. Amalgam tattoo occurs mostly in the gingiva and alveolar muco...

InnovatIvE DayDrEamIng Neuroscientists have been studying what the brain does when it isn’t doing anything in particular.1 Neuroimaging studies have found that the brain is surprisingly busy. In addition, the body is putting quite a bit of effort into that activity, as measured by a drop in blood flow of just 5–10 percent during periods of “rest.” Functional magnetic resonance imaging suggests ...

Jane Lubchenco smiles as a dolphin leaps out of the water, arcs in the air and splashes back down just a few metres away. The 63-year-old marine ecologist is out on a boat near Pascagoula, Mississippi, with a team of researchers studying how the recent oil spill in the Gulf of Mexico has affected dolphin communities there. On this October day, Lubchenco wears starfish-shaped earrings and a cap ...

Index words: Delayed hypersensitivity, nickel allergy, nickeltitanium, nickel-free Address for correspondence: Gerry Rahilly, Orthodontic Department, Leeds Dental Institute, Clarendon Way, Leeds LS2 9LU, UK. Email: [email protected] 172 G. Rahilly and N. Price Features Section JO March 2003 increased by mechanical irritation, skin maceration, or oral mucosal injury, all of which may occ...

W e have a thriving biotechnology industry in the United States. There are over 1,450 biotechnology companies developing diagnostic and treatment technologies in medicine, creating more nutritional foods, and innovating new industrial processes.1 Yet this $28.5 billion sector of the economy is not without controversy.2 The “bio” in biotechnology comes from living, biological entities – people, ...

Assembling large jigsaw puzzles is difficult, and most of us haven’t even seen a 10,000 piece puzzle on sale in a toy store. Such puzzles require an enormous dedication, and most children (not to mention adults) are not willing to put the time and effort into their assembly. Moreover, it is only feasible for multi-feature compositions like “Garden of Pleasures” by Hieronymus Bosch (one of the b...

The Altar of Augustan Peace (Ara Pacis Augustae) in Rome, constructed between 13 and 9 B.C., has attracted much attention as a political, social and artistic document of the early principate (e.g. recently, P. Rehak, Art Bulletin 86 [2001] 190-208) . Its elaborate scheme of decoration includes two long historical friezes depicting approximately one hundred individuals in parallel processions, p...