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Topic Review
Indefinite Lifespan
Indefinite lifespan (also known as indefinite life extension or bio-indefinite) is a term used in the life extension movement and transhumanism to refer to the hypothetical longevity of humans (and other life-forms) under conditions in which ageing is effectively and completely prevented and treated. Their lifespans would be "indefinite" (that is, they would not be "immortal"), because protection from the effects of aging on health does not guarantee survival. Such individuals would still be susceptible to death by disease, starvation, accidents, or deliberate killing, but not death from aging. Semantically, "indefinite lifespan" is more accurate than "immortality" which, especially in religious contexts, implies an inability to die.
  • 2.8K
  • 26 Oct 2022
Topic Review
Underground Spaces
Underground spaces with varying thermal, ventilation, and lighting environments can face problems of comfort, health, and safety. High temperatures, high humidity, difficulty in flue gas emission, harmful microorganisms, radon, and physical and psychological problems are examples of issues.
  • 2.8K
  • 11 Jan 2022
Topic Review
Jyotisha
Jyotisha (Sanskrit: ज्योतिष, IAST: Jyotiṣa), now the term for traditional Hindu astrology, historically was the branch of knowledge dedicated to the observation of astronomical bodies in order to keep the right time for the Vedic sacrifices. It is one of the six Vedangas, or ancillary science connected with the Vedas that developed . This field of study was concerned with fixing the days and hours of Vedic rituals. Hindu astrology from the 3rd century BCE was greatly influenced by Greek tradition,. But the concept of Vedanga predates Greek contact, and there have also been later independent developments. Hindu astrology as it stands today is inherently a study of karma, which gives it a very different foundation compared to Greek astrology. In addition to this, the predictive techniques such as Dashas (planetary and sign-based time periods), Vargas (harmonic divisions of the horoscope) are not that evolved in Greek astrology.
  • 2.8K
  • 27 Sep 2022
Topic Review
Friends of Science
Friends of Science (FoS) is a non-profit advocacy organization based in Calgary, Alberta, Canada. The organization rejects the established scientific conclusion that humans are largely responsible for the currently observed global warming. Rather, they propose that "the Sun is the main direct and indirect driver of climate change," not human activity. They argued against the Kyoto Protocol. The society was founded in 2002 and launched its website in October of that year. They are largely funded by the fossil fuel industry. Madhav Khandekar, Chris de Freitas, Tim Patterson and Sallie Baliunas act or acted as advisers to the Friends of Science with their work cited in Friends' publications. Douglas Leahey has been president since December, 2009.
  • 2.8K
  • 23 Nov 2022
Topic Review
Westfailure
In 1999, international relations scholar Susan Strange introduced the term Westfailure in her posthumously published article entitled The Westfailure System. The term Westfailure is a portmanteau (West + failure) and a pun on the term Westphalian system. Commonly used in international politics, the Westphalian system refers to the system of state sovereignty that emerged from treaties signed during the 1648 Peace of Westphalia. Strange describes the Westphalian system as one that perpetuates non-intervention, the universal recognition of state sovereignty, and the "legitimate use of violence within a given territory." Put simply, the Westphalian system promotes a system where each individual state has the inalienable authority to govern their own internal affairs (laws, market, resources, etc.) without interference from other states or non-governmental actors. The principal aim of Strange's article is to highlight how this system of international governance is failing and does not "satisfy the long-term conditions of sustainability."
  • 2.8K
  • 30 Nov 2022
Topic Review
Methods to Synthesize Ultrasmall AuNPs
Gold nanoparticles (AuNPs) are continuing to gain popularity in the field of nanotechnology. New methods are continuously being developed to tune the particles’ physicochemical properties, resulting in control over their biological fate and applicability to in vivo diagnostics and therapy. The common methods of synthesizing ultrasmall AuNPs are presented.
  • 2.8K
  • 09 Aug 2022
Topic Review
Convolutional Neural Network in Histopathology
Deep learning (DL) and convolutional neural networks (CNNs) have achieved state-of-the-art performance in many medical image analysis tasks. Histopathological images contain valuable information that can be used to diagnose diseases and create treatment plans. Therefore, the application of DL for the classification of histological images is a rapidly expanding field of research.
  • 2.8K
  • 04 May 2023
Topic Review
Radioactive Waste Containing Graphite Management
Since the beginning of the nuclear industry, graphite has been widely used as a moderator and reflector of neutrons in nuclear power reactors. Some reactors are relatively old and have already been shut down. As a result, a large amount of irradiated graphite has been generated. Although several thousand papers in the International Nuclear Information Service (INIS) database have discussed the management of radioactive waste containing graphite, knowledge of this problem is not common.
  • 2.8K
  • 17 Sep 2020
Topic Review
Gut-Brain-Microbiota Axis
The brain-gut-microbiota axis is a bidirectional system enabling gut microorgan-isms to communicate with the central nervous system (CNS), and the CNS with the gut . The mechanisms of signal transmission are complex and not fully understood, but include neural, endocrine, immune and metabolic pathways.
  • 2.8K
  • 18 Feb 2021
Topic Review
Gag Order
A gag order (also known as a gagging order or suppression order) is an order, typically a legal order by a court or government, restricting information or comment from being made public or passed onto any unauthorized third party. The phrase may sometimes be used of a private order by an employer or other institution. Gag orders may be used, for example, to keep legitimate trade secrets of a company, to protect the integrity of ongoing police or military operations, or to protect the privacy of victims or minors. Conversely, as their downside, they may be abused as a useful tool for those of financial means to intimidate witnesses and prevent release of information, using the legal system rather than other methods of intimidation. Strategic Lawsuit Against Public Participation (SLAPP) orders may potentially be abused in this way. Gag orders are sometimes used in an attempt to assure a fair trial by preventing prejudicial pre-trial publicity, although their use for this purpose is controversial since they are a potentially unconstitutional prior restraint that can lead to the press's using less reliable sources such as off-the-record statements and second- or third-hand accounts. In a similar manner, a "gag law" may limit freedom of the press, by instituting censorship or restricting access to information.
  • 2.8K
  • 17 Oct 2022
Topic Review
Távora Affair
The Távora affair was a political scandal of the 18th century Portuguese court. The events triggered by the attempted assassination of King Joseph I of Portugal in 1758 ended with the public execution of the entire Távora family and its closest relatives in 1759. Some historians interpret the whole affair as an attempt by the prime minister Sebastião de Melo (later Marquis of Pombal) to limit the growing powers of the old aristocratic families.
  • 2.8K
  • 19 Oct 2022
Topic Review
Resistance Theory in the Early Modern Period
Resistance theory is an aspect of political thought, discussing the basis on which constituted authority may be resisted, by individuals or groups. In the European context it came to prominence as a consequence of the religious divisions in the early modern period that followed the Protestant Reformation. Resistance theories could justify disobedience on religious grounds to monarchs, and were significant in European national politics and international relations in the century leading up to the Peace of Westphalia of 1648. They can also underpin and justify the concept of revolution as now understood. The resistance theory of the early modern period can be considered to predate the formulations of natural and legal rights of citizens, and to co-exist with considerations of natural law. Any "right to resist" is a theory about the limitations on civil obedience. Resistance theory is an aspect of political theory; the right of self-defence is usually taken to be a part of legal theory, and was no novelty in the early modern period. Arguments about the two concepts do overlap, and the distinction is not so clear in debates.
  • 2.8K
  • 26 Oct 2022
Topic Review
Voltage Lifting Techniques for Non-Isolated DC/DC Converters
The conventional boost DC/DC converter is used to step up the input voltage to a desired higher level within the practical limit required by the load with very few components. Stepping up the voltage is achieved by storing the energy in the inductor and releasing it to the output at a higher voltage. The boost converter is very popular for capacitive load applications such as photo-flashers and battery chargers. It is also used in automotive applications, power amplifiers, adaptive control applications, battery power systems, consumer electronics, DC motor drives and power factor correction circuits.
  • 2.8K
  • 02 Mar 2023
Topic Review
Bioethanol for Cooking
Bioethanol has been identified by the academic literature and in the development community as a promising clean fuel to replace charcoal. Bioethanol is one of the cooking fuels considered to be clean based on the 2014 WHO guidelines, which aim to reduce the health risks associated with exposure to indoor air pollution from household fuel combustion. 
  • 2.8K
  • 19 Oct 2023
Topic Review
Ultraviolet Light
Ultraviolet (UV) light is a dry and biologically inert process that decreases the microorganism count by around 99.9% with minimum heating of the packing material. Between the UV lamp and the area to be disinfected, there should be no obstruction. Since dirt absorbs radiation and thereby protects bacteria, the effectiveness of this application is therefore dependent on the sanitation of the material surfaces.
  • 2.8K
  • 10 Aug 2021
Topic Review
Marinas
Marinas are known to be features related to nautical tourism. It has been defined as a port used exclusively or primarily by pleasure boats, providing services for such boats and their users, and allowing the establishment of a transit between water and land in terms of comfort. Whilst commercial ports are designed to make the port stay of the vessels shorter, marinas are conceived for leisure; therefore, the provision of a pleasant stay is attempted, seeking for a character of permanence more than the mere transit of boats and crews.
  • 2.8K
  • 31 Aug 2021
Topic Review
Applications of Aluminum-Si Alloys
Aluminum alloys are at the pinnacle of the light metal world, especially in the automotive and aerospace industries.
  • 2.8K
  • 25 Apr 2023
Topic Review
1769 Transit of Venus Observed from Tahiti
On June 3, 1769, British navigator Captain James Cook, British naturalist Joseph Banks, British astronomer Charles Green and Swedish naturalist Daniel Solander recorded the transit of Venus on the island of Tahiti during Cook's first voyage around the world. During a transit, Venus appears as a small black disc travelling across the Sun. This unusual astronomical phenomenon takes place in a pattern that repeats itself every 243 years. It includes two transits that are eight years apart, separated by breaks of 121.5 and 105.5 years. These men, along with a crew of scientists, were commissioned by the Royal Society of London for the primary purpose of viewing the transit of Venus. Not only would their findings help expand scientific knowledge, it would help with navigation by accurately calculating the observer's longitude. At this time, longitude was difficult to determine and not always precise. A "secret" mission that followed the transit included the exploration of the South Pacific to find the legendary Terra Australis Incognita or "unknown land of the South."
  • 2.8K
  • 30 Sep 2022
Topic Review
VAX-11
The VAX-11 is a discontinued family of superminicomputers developed and manufactured by Digital Equipment Corporation (DEC). They were first announced in 1977, and were the first computers to implement the Virtual Address eXtension (VAX) instruction set architecture (ISA). The VAX-11 processors also supported the user mode PDP-11 instruction set for backwards compatibility (thus the -11 in VAX-11). They were discontinued in 1988, having been supplanted by the MicroVAX family on the low end, and the VAX 8000 family on the high end. It is historically one of the most successful and studied computers in history.
  • 2.8K
  • 22 Nov 2022
Topic Review
Factors Affecting Quality in Construction
Achieving a high level of quality in a residential building, characterized by the highest level of performance features, is crucial for the client and all participants in the investment process. The identification of negative factors that occur in the investment process, and the assessment of their impact on the quality of the facility, provide important knowledge that gives the basis for controlling the course of the process.
  • 2.8K
  • 17 Feb 2024
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