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Topic Review
Shellshock (Software Bug)
Shellshock, also known as Bashdoor, is a family of security bugs in the Unix Bash shell, the first of which was disclosed on 24 September 2014. Shellshock could enable an attacker to cause Bash to execute arbitrary commands and gain unauthorized access to many Internet-facing services, such as web servers, that use Bash to process requests. On 12 September 2014, Stéphane Chazelas informed Bash's maintainer Chet Ramey of his discovery of the original bug, which he called "Bashdoor". Working with security experts, Mr. Chazelas developed a patch (fix) for the issue, which by then had been assigned the vulnerability identifier CVE-2014-6271. The existence of the bug was announced to the public on 2014-09-24, when Bash updates with the fix were ready for distribution. The bug Chazelas discovered caused Bash to unintentionally execute commands when the commands are concatenated to the end of function definitions stored in the values of environment variables. Within days of its publication, a variety of related vulnerabilities were discovered (CVE-2014-6277, CVE-2014-6278, CVE-2014-7169, CVE-2014-7186 and CVE-2014-7187). Ramey addressed these with a series of further patches. Attackers exploited Shellshock within hours of the initial disclosure by creating botnets of compromised computers to perform distributed denial-of-service attacks and vulnerability scanning. Security companies recorded millions of attacks and probes related to the bug in the days following the disclosure. Because of the potential to compromise millions of unpatched systems, Shellshock was compared to the Heartbleed bug in its severity.
  • 2.7K
  • 18 Nov 2022
Topic Review
Magnesium Forging
Interest in magnesium alloys and their applications has risen in recent years. This trend is mainly evident in casting applications, but wrought alloys are also increasingly coming into focus. Among the most common forming processes, forging is a promising candidate for the industrial production of magnesium wrought products. This overview is intended to give a general introduction into the forging of magnesium alloys and to help in the practical realization of forged products. The basics of magnesium forging practice are described and possible problems as well as material properties are discussed.
  • 2.7K
  • 10 Nov 2020
Topic Review
Glycosylation in Plant Development
The development of plants and the interplay with its environment are highly linked to glycosylation of proteins and lipids as well as metabolism and signaling of sugars.
  • 2.7K
  • 14 Jun 2021
Topic Review
People with Intellectual Disability in Nigeria
Intellectual disability (ID) is an emerging field of research in Nigeria. According to Maulik et al., the highest prevalence of people with an intellectual disability (ID) are seen in low- and middle-income countries (LMIC). In 2018, the World Health Organization estimated that 29 million people in Nigeria were living with a disability. Nigeria signed the United Convention on the Rights of Persons with Disabilities (UNCRPD) and ratified its optional Protocol in 2010—an attempt to protect the rights of disabled people and, in January 2019, passed the Discrimination Against Persons with Disabilities (Prohibition) Act 2018.
  • 2.7K
  • 06 Sep 2022
Topic Review
Road Policing Unit
A road policing unit (RPU) is the motorway and trunk-road police unit of a British police force. Most territorial police forces established traffic departments in the early 1950s, although the first was established by the Metropolitan Police Service in 1919, but it was with the opening of the M1 motorway in November 1959 that the need for the police to have a specialist department dedicated to policing the new roads was recognised. The 1960s saw the start of construction of new motorways, so the traffic departments grew. One of the first fatal accidents on the M1 occurred near Newport Pagnell, Buckinghamshire in December 1959.
  • 2.7K
  • 30 Sep 2022
Topic Review
Disk Defragmenter (Windows)
Disk Defragmenter is a utility in Microsoft Windows designed to increase access speed by rearranging files stored on a disk to occupy contiguous storage locations, a technique called defragmentation. Defragmenting a disk minimizes head travel, which reduces the time it takes to read files from and write files to the disk. Beginning with Windows XP, Disk Defragmenter also reduces system startup times. From Windows 8, the program was renamed to Defragment and Optimize Drives.
  • 2.7K
  • 31 Oct 2022
Biography
Franklin Chang Díaz
Franklin Ramón Chang Díaz (April 5, 1950)[1] is a Costa Rican Chinese American mechanical engineer, physicist, former NASA astronaut. He is the founder and current CEO of Ad Astra Rocket Company[2] as well as a member of Cummins' board of directors.[3] He became an American citizen in 1977.[4] He is of Chinese (paternal side) and Costa Rican Spanish (maternal side) descent.[5] He is a veteran
  • 2.7K
  • 18 Nov 2022
Biography
Tripp Eisen
Tripp Eisen (born Tod Rex Salvador; June 29, 1965),[1] is an American musician, best known as the former guitarist of the industrial metal band Static-X.[1] He is the guitarist for Face Without Fear and a former member of Dope, Murderdolls, Fractured Mirror (Ace Frehley tribute band), and Roughhouse (formerly Teeze)[1] Born in Pen Argyl, Pennsylvania, Eisen has made known his libertarian views
  • 2.7K
  • 30 Nov 2022
Topic Review
Bluetooth Low Energy Mesh Networks
Bluetooth Low Energy (BLE) is an increasingly prevalent Wireless Ad-Hoc Network (WAHN) technology for battery-powered Internet of Things (IoT) devices [1]. The BLE standard was introduced by the Bluetooth Special Interest Group (SIG) in Bluetooth version 4.0, and subsequently enhanced in versions 4.2 and 5. Initially, BLE 4.x adopted the legacy Bluetooth Personal Area Network (PAN) model for multi-hop communications and the interconnection of networks. BLE 5 intends to address these inadequacies via the implementation of pure mesh topology to provide enhanced network coverage, inter-network connectivity, and improved security [2].
  • 2.7K
  • 28 Oct 2020
Topic Review
Waterlogging Impacts on Crop Growth
Waterlogging has the greatest impact on photosynthesis, followed by phenology and leaf expansion, suggesting a need for improved equations linking waterlogging to carbon assimilation. In agricultural fields, soil waterlogging can occur for many reasons. These may include excessive rainfall or irrigation, poor soil drainage, rising or perched water tables, as well as lateral surface or subsurface flows. This may lead to reduced oxygen within soil pores, causing reduced growth and, sometimes, crop death. 
  • 2.7K
  • 06 Sep 2022
Topic Review
Acridine
Acridine, an alkaloid from anthracene, also known by the names of 10-azaanthracene, dibenzopyridine, 2,3,5,6-dibenzopyridine, and its derivatives or analogs, have a great potential to be an efficient class of excellent inhibitor. The phenomenon of corrosion threatens metallic components, human safety, and the economy. Despite being eco-friendly and promising as a corrosion inhibitor, acridine has not been explored to its full potential. 
  • 2.7K
  • 09 Nov 2022
Topic Review
University of Florida Taser Incident
The University of Florida Taser incident was an incident in which a University of Florida student was stunned with a taser at a forum featuring then U.S. Senator John Kerry. On September 17, 2007, Kerry addressed a Constitution Day forum at the University of Florida campus in Gainesville, which was organized by the ACCENT Speakers Bureau, an agency of the university's student government. Andrew Meyer, a 21-year-old fourth-year undergraduate mass communication student, had initially been allowed to ask a question after the close of the question period. He asked Kerry whether he was a member of Skull and Bones, as George W. Bush is, implying that Kerry did not contest Bush's presidency because of their shared affiliation. Meyer was forcibly pulled away from the microphone. He was immediately restrained and forcibly removed and was subsequently arrested by university police. During his arrest, Meyer struggled and screamed for help. While six officers held Meyer down, one of the officers drive-stunned him with a taser following Meyer's shouted plea to the police, "Don't tase me, bro!" Several videos of the episode were posted on the Web, with one version reaching 7 million views on YouTube. The New Oxford American Dictionary listed tase or taze as one of the words of the year for 2007, popularized by the widespread use of the phrase. Meyer registered the phrase as a trademark in September 2007.
  • 2.7K
  • 23 Nov 2022
Topic Review
CD44 Receptor
CD44 is a receptor described as a single span transmembrane glycoprotein without kinase activity whose ubiquitous and constitutive expression has been observed on many different cells.
  • 2.7K
  • 18 Mar 2021
Topic Review
Aerobic Granular Sludge
The aerobic granular sludge (AGS) method, which has been developed for several years, may represent an alternative to traditional technologies. One of the barriers to AGS deployment is the limited knowledge on the determinants and efficiency of the anaerobic digestion (AD) of AGS, as little research has been devoted to it.
  • 2.7K
  • 08 Oct 2022
Topic Review
Calcium Transport Systems in Mitochondria
Calcium (Ca2+) is a divalent cation and a universal second messenger that regulates the most important functions and facets of all eukaryotic cells, including: gene expression, proliferation, regulation of bioenergetics, contraction of muscles, mediation of fertilization, and many other cellular functions. Regulation of free intracellular concentration of Ca2+ is an important mechanism for intracellular signaling, and it is a key component in the mediation of many cell functions and biochemical reactions, being crucial for signal transduction in cells. On top of all that, intra-mitochondrial Ca2+ regulates a cascade of physiological and pathophysiological processes in cells The normal level of intra-mitochondrial Са2+ is essential for the correct functioning of mitochondria; whereas Ca2+ overload is typical for a wide range of mitochondrial dysfunctions and pathophysiological processes. Homeostasis of Ca2+ in the mitochondria is determined by the delicate balance of mitochondrial Ca2+ transport systems in both the inner (IMM) and outer mitochondrial membrane (OMM). Ca2+ influx and efflux systems are composed of different components, including: channels, pumps, antiporters, or Ca2+ binding proteins that cooperate to maintain intra-mitochondrial Ca2+ homeostasis.
  • 2.7K
  • 18 Nov 2020
Topic Review
Fossil Fuels Lobby
"Fossil fuels lobby" is a term used to label the paid representatives of large fossil fuel (oil, gas, coal) and electric utilities corporations who attempt to influence governmental policy. So-called Big Oil companies such as ExxonMobil, Royal Dutch Shell, BP, Total S.A., Chevron Corporation, and ConocoPhillips are amongst the largest corporations associated with the fossil fuels lobby. General Electric, Southern Company, First Energy, and the Edison Electric Institute are also among the most influential electric utilities corporations. By sector, "Energy/Nat Resource" comes fifth, behind "Misc Business", "Finance/Insur/RealEst", Health and "Communic/Electronics".
  • 2.7K
  • 27 Oct 2022
Topic Review
Chromogenic Technologies for Energy Saving
Chromogenic materials and devices include a wide range of technologies that are capable of changing their spectral properties according to specific external stimuli. Several studies have shown that chromogenics can be conveniently used in building façades in order to reduce energy consumption, with other significant effects. First of all, chromogenics influence the annual energy balance of a building, achieving significant reductions in consumption for HVAC and artificial lighting. In addition, these technologies potentially improve the indoor level of visual comfort, reducing the risks of glare and excessive lighting. 
  • 2.7K
  • 19 Dec 2020
Topic Review
Renal Artery Ultrasound
Renal artery stenosis (RAS) is one of the major causes of secondary hypertension and renal impairment. Ultrasound (US) is a noninvasive, real-time examination method for detecting RAS. The available US scanners enable the depiction of small vessels or organs. Gray-scale US can assess the morphology of the renal artery and kidney. Hemodynamic changes in the renal artery and kidney are evaluated with color and spectral Doppler US. Contrast-enhanced US may directly show the diameter change in the renal artery with intravascular contrast material that is not harmful to patients with poor renal function. Therefore, US is a useful examination method for detecting RAS, regardless of patient renal function. 
  • 2.7K
  • 14 Oct 2022
Topic Review
Luxembourg Leaks
Luxembourg Leaks (sometimes shortened to Lux Leaks or LuxLeaks) is the name of a financial scandal revealed in November 2014 by a journalistic investigation conducted by the International Consortium of Investigative Journalists. It is based on confidential information about Luxembourg's tax rulings set up by PricewaterhouseCoopers from 2002 to 2010 to the benefits of its clients. This investigation resulted in making available to the public tax rulings for over three hundred multinational companies based in Luxembourg. The LuxLeaks' disclosures attracted international attention and comment about tax avoidance schemes in Luxembourg and elsewhere. This scandal contributed to the implementation of measures aiming at reducing tax dumping and regulating tax avoidance schemes beneficial to multinational companies. The judicial aspects of this case concern the persons charged by Luxembourg justice for participating in the revelations. No multinational company was charged. The LuxLeaks trial took place in spring 2016 and led to the condemnation of the two whistleblowers. The appeal trial's judgment was delivered in March 2017, upholding monetary fines and reducing the suspended jail sentence for Deltour.
  • 2.7K
  • 25 Oct 2022
Topic Review
Lion
The lion (Panthera leo) is a majestic carnivorous mammal renowned for its strength, beauty, and social structure. Found primarily in savannas, grasslands, and open woodlands across sub-Saharan Africa and a small population in the Gir Forest of India, lions are iconic symbols of power and pride. With their distinctive golden coats, impressive manes (in males), and formidable hunting prowess, lions hold a prominent place in the collective imagination and ecological balance of their habitats.
  • 2.7K
  • 08 Mar 2024
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