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🔗 United States 🔗 Computing 🔗 Military history 🔗 Military history/North American military history 🔗 Military history/United States military history 🔗 Military history/Military science, technology, and theory 🔗 Military history/Weaponry 🔗 Iran 🔗 Computing/Software 🔗 Computing/Computer Security 🔗 Military history/Middle Eastern military history

Stuxnet is a malicious computer worm, first uncovered in 2010, thought to have been in development since at least 2005. Stuxnet targets supervisory control and data acquisition (SCADA) systems and is believed to be responsible for causing substantial damage to the nuclear program of Iran. Although neither country has openly admitted responsibility, the worm is widely understood to be a cyberweapon built jointly by the United States and Israel.

Stuxnet specifically targets programmable logic controllers (PLCs), which allow the automation of electromechanical processes such as those used to control machinery and industrial processes including gas centrifuges for separating nuclear material. Exploiting four zero-day flaws, Stuxnet functions by targeting machines using the Microsoft Windows operating system and networks, then seeking out Siemens Step7 software. Stuxnet reportedly compromised Iranian PLCs, collecting information on industrial systems and causing the fast-spinning centrifuges to tear themselves apart. Stuxnet's design and architecture are not domain-specific and it could be tailored as a platform for attacking modern supervisory control and data acquisition (SCADA) and PLC systems (e.g., in factory assembly lines or power plants), most of which are in Europe, Japan, and the US. Stuxnet reportedly ruined almost one-fifth of Iran's nuclear centrifuges. Targeting industrial control systems, the worm infected over 200,000 computers and caused 1,000 machines to physically degrade.

Stuxnet has three modules: a worm that executes all routines related to the main payload of the attack; a link file that automatically executes the propagated copies of the worm; and a rootkit component responsible for hiding all malicious files and processes, to prevent detection of Stuxnet. It is typically introduced to the target environment via an infected USB flash drive, thus crossing any air gap. The worm then propagates across the network, scanning for Siemens Step7 software on computers controlling a PLC. In the absence of either criterion, Stuxnet becomes dormant inside the computer. If both the conditions are fulfilled, Stuxnet introduces the infected rootkit onto the PLC and Step7 software, modifying the code and giving unexpected commands to the PLC while returning a loop of normal operation system values back to the users.

In 2015, Kaspersky Lab noted that the Equation Group had used two of the same zero-day attacks prior to their use in Stuxnet and commented that "the similar type of usage of both exploits together in different computer worms, at around the same time, indicates that the Equation Group and the Stuxnet developers are either the same or working closely together".

🔗 Alternative Views

The God helmet is an experimental apparatus originally called the Koren helmet (or Koren octopus) after its inventor Stanley Koren. It was developed by Koren and neuroscientist Michael Persinger to study creativity, religious experience and the effects of subtle stimulation of the temporal lobes. Reports by participants of a "sensed presence" while wearing the God helmet brought public attention and resulted in several TV documentaries. The device has been used in Persinger's research in the field of neurotheology, the study of the purported neural correlations of religion and spirituality. The apparatus, placed on the head of an experimental subject, generates very weak magnetic fields, that Persinger refers to as "complex". Like other neural stimulation with low-intensity magnetic fields, these fields are approximately as strong as those generated by a land line telephone handset or an ordinary hair dryer, but far weaker than that of an ordinary refrigerator magnet and approximately a million times weaker than transcranial magnetic stimulation.

Persinger reports that many subjects have reported "mystical experiences and altered states" while wearing the God Helmet. The foundations of his theory have been criticized in the scientific press. Anecdotal reports by journalists, academics and documentarists have been mixed and several effects reported by Persinger have not yet been independently replicated. One attempt at replication published in the scientific literature reported a failure to reproduce Persinger's effects and the authors proposed that the suggestibility of participants, improper blinding of participants or idiosyncratic methodology could explain Persinger's results. Persinger argues that the replication was technically flawed, but the researchers have stood by their replication. Only one group has published a direct replication of one God Helmet experiment. Other groups have reported no effects at all or have generated similar experiences by using sham helmets, or helmets that are not turned on, and have concluded that personality differences in the participants explain these unusual experiences.

🔗 Cetaceans

The 52-hertz whale is an individual whale of unidentified species which calls at the very unusual frequency of 52 Hz. This pitch is a much higher frequency than that of the other whale species with migration patterns most closely resembling this whale's – the blue whale (10–39 Hz) or fin whale (20 Hz). It has been detected regularly in many locations since the late 1980s and appears to be the only individual emitting a whale call at this frequency. It has been described as the "world's loneliest whale".

🔗 Military history 🔗 Military history/Military science, technology, and theory 🔗 Books 🔗 Classical Greece and Rome 🔗 Greece 🔗 Middle Ages 🔗 Middle Ages/History 🔗 Military history/Roman and Byzantine military history 🔗 Military history/Medieval warfare 🔗 Greece/Byzantine world 🔗 Military history/Balkan military history 🔗 Military history/European military history

The Strategikon or Strategicon (Greek: Στρατηγικόν) is a manual of war traditionally regarded as written in the late 6th century and usually attributed to the Byzantine Emperor Maurice. It is moreover a practical manual, "a rather modest elementary handbook" in the words of its introduction, "for those devoting themselves to generalship". This book gives a general guide, handbook, of the Byzantine military's strategies. In his introduction to his 1984 translation of the text, George T. Dennis noted "The Strategikon is written in a very straightforward and generally uncomplicated Greek."

The Strategikon may have been written in an effort to codify the military reforms brought about by the soldier-emperor Maurice. There is debate in academic circles as to the true author of the Strategikon. Maurice may have only commissioned it; perhaps his brother Peter, or another general of his court, was the true author. The dating is also debated. If it was written in the 6th century, the Strategikon may have been produced to codify the experience of the Balkan and Persian campaigns, or the campaigns may have been carried out in compliance with the manual. However, starting in the late 19th century, some historians have argued for a later date in the eighth or ninth century, on philological or technological grounds. In any case, it is considered one of the most important military texts of the medieval years, along with the 10th century military treatises attributed to the Byzantine emperors Leo VI (Tactica) and Nicephorus Phocas (De velitatione and Praecepta Militaria); Leo's Tactica in particular drew heavily from the Strategikon.

The text consists of 12 chapters, or "books", on various aspects of the tactics employed by the Byzantine military of the 6th and 7th century A.D. It is primarily focused on cavalry tactics and formations, yet it also elaborates on matters of infantry, sieges, baggage trains, drilling and marching. The author was familiar with classical military treatises, especially Onasander and Aelian, which he used as conceptional models rather than sources of content. Each book has a general topic to be discussed, and each book goes into great detail even separating each book further into subsections and including maps. These maps are not large and extravagant but more symbols to show positions and a standard design of the formations the Byzantine military used at this time. Books seven and eight contain practical advice to the General in the form of instructions and maxims. The eleventh book has ethnographic interest, with its portrayal of various Byzantine enemies (Franks, Lombards, Avars, Turks, and Slavs). The Strategikon also belongs to Byzantine legal literature, since it contains a list of military infractions and their suitable penalties.

"Pierre Menard, Author of the Quixote" (original Spanish title: "Pierre Menard, autor del Quijote") is a short story by Argentine writer Jorge Luis Borges.

It originally appeared in Spanish in the Argentine journal Sur in May 1939. The Spanish-language original was first published in book form in Borges's 1941 collection El jardín de senderos que se bifurcan (The Garden of Forking Paths), which was included in his much-reprinted Ficciones (1944).

🔗 Human rights 🔗 Medicine 🔗 History of Science 🔗 Alabama 🔗 Science Policy 🔗 Nursing

The Tuskegee Study of Untreated Syphilis in the Negro Male (informally referred to as the Tuskegee Experiment or Tuskegee Syphilis Study) was a study conducted between 1932 and 1972 by the United States Public Health Service (PHS) and the Centers for Disease Control and Prevention (CDC) on a group of nearly 400 African American men with syphilis. The purpose of the study was to observe the effects of the disease when untreated, though by the end of the study medical advancements meant it was entirely treatable. The men were not informed of the nature of the experiment, and more than 100 died as a result.

The Public Health Service started the study in 1932 in collaboration with Tuskegee University (then the Tuskegee Institute), a historically Black college in Alabama. In the study, investigators enrolled a total of 600 impoverished African-American sharecroppers from Macon County, Alabama. Of these men, 399 had latent syphilis, with a control group of 201 men who were not infected. As an incentive for participation in the study, the men were promised free medical care. While the men were provided with both medical and mental care that they otherwise would not have received, they were deceived by the PHS, who never informed them of their syphilis diagnosis and provided disguised placebos, ineffective methods, and diagnostic procedures as treatment for "bad blood".

The men were initially told that the experiment was only going to last six months, but it was extended to 40 years. After funding for treatment was lost, the study was continued without informing the men that they would never be treated. None of the infected men were treated with penicillin despite the fact that, by 1947, the antibiotic was widely available and had become the standard treatment for syphilis.

The study continued, under numerous Public Health Service supervisors, until 1972, when a leak to the press resulted in its termination on November 16 of that year. By then, 28 patients had died directly from syphilis, 100 died from complications related to syphilis, 40 of the patients' wives were infected with syphilis, and 19 children were born with congenital syphilis.

The 40-year Tuskegee Study was a major violation of ethical standards and has been cited as "arguably the most infamous biomedical research study in U.S. history." Its revelation led to the 1979 Belmont Report and to the establishment of the Office for Human Research Protections (OHRP) and federal laws and regulations requiring institutional review boards for the protection of human subjects in studies. The OHRP manages this responsibility within the United States Department of Health and Human Services (HHS). Its revelation has also been an important cause of distrust in medical science and the US government amongst African Americans.

On May 16, 1997, President Bill Clinton formally apologized on behalf of the United States to victims of the study, calling it shameful and racist. "What was done cannot be undone, but we can end the silence," he said. "We can stop turning our heads away. We can look at you in the eye, and finally say, on behalf of the American people, what the United States government did was shameful and I am sorry."

🔗 Environment 🔗 India 🔗 Birds

Nine species of vulture can be found living in India, but most are now in danger of extinction after a rapid and major population collapse in recent decades. In the early 1980s, three species of Gyps vultures (the white-rumped vulture, the long-billed vulture and the slender-billed vulture) had a combined estimated population of 40 million in South Asia, but as of 2017, the total population numbered only 19,000 (6,000, 12,000, and 1,000 respectively). With a catastrophic loss of over 99.95% of all the vultures in South Asia, the Indian vulture crisis represents the sharpest decline of any animal known to man in the same number of years. A major contributing factor in declining populations of vultures is believed to be widespread use of drugs such as diclofenac, once commonly used as a livestock anti-inflammatory drug. Veterinary usage of diclofenac has been banned in India since 2006. The IUCN Red Data Book has listed Gyps bengalensis as "critically endangered". In winter 2012, 56 vultures in three species (Eurasian griffon, cinereous vulture, Egyptian vulture) and 10 steppe eagles were found dead at a dumping site in Jorbeer, Rajasthan. Six Eurasian griffons were found dead in May 2013 due to dehydration and wing weakness. The area has been declared as a conserved forest area, but the carcass dumping site is not part of the protected area.

The dramatic vulture decline observed across India presents a range of ecological threats, by influencing the numbers and distribution of other scavenging species. Increased feral dog populations have been reported all over India, posing many associated disease risks such as rabies to humans and wildlife. India already accounts for a very high incidence of rabies cases, and an absolute shortage of quality anti-rabies vaccine in rural areas can aggravate the problem even further. Similarly, increased crow populations at carcass sites near settlement areas pose a risk of infections to poultry, domesticated birds, and humans. Prevalence and concentration of diclofenac residues in ungulate carcasses is important for India's threatened vulture populations. A small proportion (< 0.8%) of ungulate carcasses containing lethal levels of diclofenac is enough to cause the observed rapid decline of vultures population. (Bohra D L)

Vultures previously played an important role in public sanitation in India and their disappearance has resulted in a number of problems, and as such numerous conservation schemes are in place to assist in the recovery of vulture populations.

🔗 Biography 🔗 India

Edmund Thomas Clint (19 May 1976 — 15 April 1983) was an Indian child prodigy known for having drawn over 25,000 paintings during his short life of less than seven years.

🔗 Songs

"Old Man Trump" is a song with lyrics written by American folk singer-songwriter Woody Guthrie in 1954. The song describes the racist housing practices and discriminatory rental policies of his landlord, Fred Trump (the father of the 45th president of the United States, Donald Trump). Although the lyrics were written in 1954, it was never recorded by Guthrie. In January 2016, Will Kaufman, a Guthrie scholar and professor of American literature and culture at the University of Central Lancashire, unearthed the handwritten lyrics while conducting research at the Woody Guthrie Archives in Tulsa, Oklahoma.

🔗 Lists 🔗 Industrial design

The following is a list of adhesive tapes with pressure-sensitive adhesives: