José Jair Santanna

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This study measured changes in regional cerebral blood flow (rCBF) during the complex cognitive task of meditation using single photon emission computed tomography. Eight experienced Tibetan Buddhist meditators were injected at baseline with 7 mCi HMPAO and scanned 20 min later for 45 min. The subjects then meditated for 1 h at which time they were injected(More)
BACKGROUND Although the rate of death from injuries due to violent acts is much higher among black women than among white women in the United States, little is known about the nature and correlates of violent injuries among black women living in urban areas. METHODS In this case-control study conducted at three emergency departments in one inner-city(More)
—In 2012, the Dutch National Research and Education Network, SURFnet, observed a multitude of Distributed Denial of Service (DDoS) attacks against educational institutions. These attacks were effective enough to cause the online exams of hundreds of students to be cancelled. Surprisingly, these attacks were purchased by students from websites, known as(More)
Distributed Denial of Service (DDoS) attacks are an increasing threat on the Internet. Until a few years ago, these types of attacks were only launched by people with advanced knowledge of computer networks. However, nowadays the ability to launch attacks have been offered as a service to everyone, even to those without any advanced knowledge. Booters are(More)
—Distributed Denial of Service (DDoS) attacks are an increasing threat on the Internet. One of the reasons is that websites selling attacks for prices starting from $1.00 are becoming popular. These websites, called Booters, facilitate attacks by making transparent the needed infrastructure to perform attacks and by lowering the knowledge to control it. As(More)
—Internet of Things devices being used now expose limitations that prevent their proper use in healthcare systems. Interoperability and security are especially impacted by such limitations. In this paper, we discuss today´s issues, including benefits and difficulties, as well as approaches to circumvent the problems of employing and integrating Internet of(More)
Dependable operation of the Internet is of crucial importance for our society. In recent years Distributed Denial of Service (DDoS) attacks have quickly become a major problem for the Internet. Most of these attacks are initiated by kids that target schools, ISPs, banks and web-shops; the Dutch NREN (SURFNet), for example, sees around 10 of such attacks per(More)