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Topic Review
Compounds of Oxygen
The oxidation state of oxygen is −2 in almost all known compounds of oxygen. The oxidation state −1 is found in a few compounds such as peroxides. Compounds containing oxygen in other oxidation states are very uncommon: −​1⁄2 (superoxides), −​1⁄3 (ozonides), 0 (elemental, hypofluorous acid), +​1⁄2 (dioxygenyl), +1 (dioxygen difluoride), and +2 (oxygen difluoride). Oxygen is reactive and will form oxides with all other elements except the noble gases helium, neon, argon, and krypton.
  • 5.7K
  • 26 Oct 2022
Topic Review
Okara and Gut
Okara is a white-yellow fibrous residue consisting of the insoluble fraction of the soybean seeds remaining after extraction of the aqueous fraction during the production of tofu and soymilk, and is generally considered a waste product. It is packed with a significant number of proteins, isoflavones, soluble and insoluble fibers, soyasaponins, and other mineral elements, which are all attributed with health merits. With the increasing production of soy beverages, huge quantities of this by-product are produced annually, which poses significant disposal problems and financial issues for producers. Extensive studies have been done on the biological activities, nutritional values, and chemical composition of okara as well as its potential utilization. Owing to its peculiar rich fiber composition and low cost of production, okara might be potentially useful in the food industry as a functional ingredient or good raw material and could be used as a dietary supplement to prevent varied ailments such as prevention of diabetes, hyperlipidemia, obesity, as well as to stimulate the growth of intestinal microbes and production of microbe-derived metabolites (xenometabolites), since gut dysbiosis (imbalanced microbiota) has been implicated in the progression of several complex diseases.
  • 5.7K
  • 31 Jan 2021
Topic Review
Understanding Hotel Service Failures
Service failure is inevitable. Service in the hospitality industry involves multiple interactions between the service providers and customers, and a high risk of service failures accompanies these interactions. Although empirical studies on the outcomes and processes of service failures have been conducted in the hotel industry, the findings need more exploration to understand how different segments perceive service failures and the associated emotions differently. This study revealed the similarities and differences between groups (i.e., men vs. women and leisure vs. business) in reporting service failures. Different meanings of words that emerged from the text-mining results were also examined to ensure a more comprehensive understanding of the guest experience.
  • 5.7K
  • 15 Mar 2022
Topic Review
Internet of Things in the Industry Revolution 4.0
Researchers offers a wide range of information on Industry 4.0, finds research gaps and recommends future directions. Seven research questions are addressed: (i) What are the contributions of WSN in IR 4.0? (ii) What are the contributions of IoT in IR 4.0? (iii) What are the types of WSN coverage areas for IR 4.0? (iv) What are the major types of network intruders in WSN and IoT systems? (v) What are the prominent network security attacks in WSN and IoT? (vi) What are the significant issues in IoT and WSN frameworks? and (vii) What are the limitations and research gaps in the existing work? Researchers mainly focuses on the solutions and new techniques to automate Industry 4.0 and analyzed over 130 articles from 2014 until 2021. The entry covers several aspects of Industry 4.0, from the designing phase to security needs, from the deployment stage to the classification of the network, the difficulties, challenges, and future directions.
  • 5.7K
  • 16 Mar 2022
Topic Review
Orion
Orion, one of the most recognizable constellations in the night sky, is steeped in mythology and astronomical significance. Named after the legendary hunter from Greek mythology, Orion is adorned with bright stars, including the famous Orion's Belt, and hosts a plethora of celestial wonders, such as the Orion Nebula, making it a favorite among stargazers.
  • 5.7K
  • 15 Mar 2024
Topic Review
Normative
Normative generally means relating to an evaluative standard. Normativity is the phenomenon in human societies of designating some actions or outcomes as good or desirable or permissible and others as bad or undesirable or impermissible. A norm in this normative sense means a standard for evaluating or making judgments about behavior or outcomes. Normative is sometimes also used, somewhat confusingly, to mean relating to a descriptive standard: doing what is normally done or what most others are expected to do in practice. In this sense a norm is not evaluative, a basis for judging behavior or outcomes; it is simply a fact or observation about behavior or outcomes, without judgment. Many researchers in science, law, and philosophy try to restrict the use of the term normative to the evaluative sense and refer to the description of behavior and outcomes as positive, descriptive, predictive, or empirical. Normative has specialised meanings in different academic disciplines such as philosophy, social sciences, and law. In most contexts, normative means 'relating to an evaluation or value judgment.' Normative propositions tend to evaluate some object or some course of action. Normative content differs from descriptive content. One of the major developments in analytic philosophy has seen the reach of normativity spread to virtually all corners of the field, from ethics and the philosophy of action, to epistemology, metaphysics, and the philosophy of science. Saul Kripke famously showed that rules (including mathematical rules, such as the repetition of a decimal pattern) are normative in an important respect. Though philosophers disagree about how normativity should be understood, it has become increasingly common to understand normative claims as claims about reasons. As Derek Parfit explains:
  • 5.7K
  • 14 Oct 2022
Topic Review
Peppercorn (Legal)
In legal parlance, a peppercorn is a metaphor for a very small cash payment or other nominal consideration, used to satisfy the requirements for the creation of a legal contract. It is featured in Chappell & Co Ltd v Nestle Co Ltd ( AC 87), which stated that "a peppercorn does not cease to be good consideration if it is established that the promisee does not like pepper and will throw away the corn". What is unusual about the term is that it came into the language when peppercorns were extremely expensive; coming, as they exclusively did, from the Dutch Moluccas. Yet today, the term is more-or-less synonymous with ”a pittance“ — something of minimal value.
  • 5.7K
  • 01 Nov 2022
Topic Review Peer Reviewed
Low-Pressure Turbine Cooling Systems
Modern low-pressure turbine engines are equipped with casings impingement cooling systems. Those systems (called Active Clearance Control) are composed of an array of air nozzles, which are directed to strike turbine casing to absorb generated heat. As a result, the casing starts to shrink, reducing the radial gap between the sealing and rotating tip of the blade. Cooling air is delivered to the nozzles through distribution channels and collector boxes, which are connected to the main air supply duct. The application of low-pressure turbine cooling systems increases its efficiency and reduces engine fuel consumption.
  • 5.7K
  • 13 Apr 2022
Topic Review
Candida albicans
Candida albicans is a common commensal fungus that colonizes the oropharyngeal cavity, gastrointestinal and vaginal tract, and healthy individuals’ skin.
  • 5.7K
  • 23 Feb 2021
Topic Review
Urban-Resilience Computation Simulation
Urban resilience refers to the ability of an urban system to withstand, absorb, recover, and adapt to man-made or natural disturbances and to learn timely control of current and future expectations. Simulating the dynamic process of urban resilience and analyzing the mechanism of resilience-influencing factors are of great significance to improve the intelligent decision-making ability of resilient urban planning. 
  • 5.7K
  • 19 Oct 2022
Topic Review
Algorithmic Journalism
A term that attempts to describe the procedures that have been brought about by recent technological changes in the field of journalism. Characterized by researchers as “the process of using software or algorithms to automatically generate news stories" (Graefe 2016) and “the combination of algorithms, data, and knowledge from the social sciences to supplement the accountability function of journalism” (Hamilton and Turner 2009).
  • 5.7K
  • 03 Jun 2021
Topic Review
Aloe vera
Aloe vera plant offers a sustainable solution for the removal of various pollutants from water. Due to its chemical composition, Aloe vera has been explored as coagulant/flocculant and biosorbent for water treatment. 
  • 5.7K
  • 23 Jun 2021
Topic Review
Sannyasa
Sannyasa (saṃnyāsa) is the life stage of renunciation within the Hindu philosophy of four age-based life stages known as ashramas, with the first three being Brahmacharya (bachelor student), Grihastha (householder) and Vanaprastha (forest dweller, retired). Sannyasa is traditionally conceptualized for men or women in late years of their life, but young brahmacharis have had the choice to skip the householder and retirement stages, renounce worldly and materialistic pursuits and dedicate their lives to spiritual pursuits. Sannyasa is a form of asceticism, is marked by renunciation of material desires and prejudices, represented by a state of disinterest and detachment from material life, and has the purpose of spending one's life in peaceful, love-inspired, simple spiritual life. An individual in Sanyasa is known as a Sannyasi (male) or Sannyasini (female) in Hinduism, which in many ways parallel to the Sadhu and Sadhvi traditions of Jain monasticism, the bhikkhus and bhikkhunis of Buddhism and the monk and nun traditions of Christianity, respectively. Sannyasa has historically been a stage of renunciation, ahimsa (non-violence) peaceful and simple life and spiritual pursuit in Indian traditions. However, this has not always been the case. After the invasions and establishment of Muslim rule in India, from the 12th century through the British Raj, parts of the Shaiva and Vaishnava ascetics metamorphosed into a military order, to rebel against persecution, where they developed martial arts, created military strategies, and engaged in guerrilla warfare. These warrior sanyasis (ascetics) played an important role in helping European colonial powers establish themselves in India.
  • 5.7K
  • 08 Oct 2022
Topic Review
Chromatographic Techniques in Pharmaceutical Analysis
High-performance liquid chromatography (HPLC) is an incredibly universal tool, especially when combined with different detectors, such as UV-Visible spectroscopy, mass spectrometry (MS), and fluorescence detection for numerous active ingredients in different pharmaceutical formulations without interferences from other excipients. TLC, in combination with densitometry, is a very efficient tool for the determination of biologically active substances present in pharmaceutical preparations. In addition, TLC coupled to densitometry and mass spectrometry could be suitable for preliminary screening and determination of the biological activity (e.g., antioxidant properties, thin layer chromatography (TLC) by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method) of plant materials. Gas chromatography, coupled with a mass spectrometer (GC-MS, GC-MS/MS), is of particular importance in the testing of any volatile substances, such as essential oils. LC, coupled to NMR and MS, is the best solution for identifying and studying the structure of unknown components from plant extracts, as well as degradation products (DPs). Thanks to size-exclusion chromatography, coupled to multi-angle light scattering, the quality control of biological pharmaceuticals is possible.
  • 5.7K
  • 26 Apr 2022
Topic Review
Anthrozoology
Anthrozoology is the interdisciplinary study of relationships between humans and other animals.
  • 5.7K
  • 01 Aug 2024
Topic Review
Manual Muscle Testing for Post-Stroke Upper Extremity Assessment
The Manual Muscle Testing (MMT) scoring system is an assessment tool used by rehabilitation physicians or physiatrists, physiotherapists, neurologists, and other clinicians who deal with the individuals’ functional status. The most frequently used approach is the use of MMT to assess the grade of muscle weakness in different pathologies.
  • 5.7K
  • 16 Jun 2022
Topic Review
Innovative Industrial Use of Bamboo
Industrial and service development has led researchers to focus on non-conventional materials with significant roles in innovation development and implementation. Entrepreneurs aim to develop innovative and creative strategies using good, valuable, durable, and sustainable materials that serve industrial and economic development. As result, the use of natural construction and production materials has increased interest related to the desire of developing greener and/or environmentally friendly processes. Several natural, re-emerging materials used in the past (e.g., bamboo, straw, reeds, and hemp) have been found useful again and deserving of research to fully understand their potential for different applications. 
  • 5.7K
  • 21 Feb 2022
Topic Review
Recent Trends in Copper Metallization
The Cu/low-k damascene process was introduced to alleviate the increase in the RC delay of Al/SiO2 interconnects, but now that the technology generation has reached 1× nm or lower, a number of limitations have become apparent. Due to the integration limit of low-k materials, the increase in the RC delay due to scaling can only be suppressed through metallization.
  • 5.7K
  • 28 Sep 2022
Topic Review
Passive Films
The outstanding corrosion resistance of many metals and alloys results from the presence of a thin oxide-“passive”-film on the bare metal surface formed during its exposure to an oxidising environment. Once a film is formed, typically 1-3 nm thick, the reaction rate between the metallic material and the environment will be several orders of magnitude lower. The original theory of film formation goes back to Michael  Faraday, who in the 19th century studied iron surfaces and found them “altered”. A review of the early days of passive film research has been written by Uhlig (1979). A general introduction to the theory of passivity has been published by Sato (1990), whereas the electronic properties of passive films on different materials have been  reviewed by Schultze and Lohrengel (2000). The characterisation of the composition and structure of such thin films and the study of their interaction with corrosive environments requires a combination of sophisticated experimental techniques, namely electrochemical methods, XPS, ESCA, AES, SIMS, ISS, ARXPS, XANES, ICP-AES/MS, and others, which are leading to advanced progress over the past two decades.
  • 5.7K
  • 21 Dec 2020
Topic Review
Unlawful Combatant
An unlawful combatant, illegal combatant or unprivileged combatant/belligerent is, according to United States law, a person who directly engages in armed conflict in violation of the laws of war and therefore is claimed to not be protected by the Geneva Conventions. The International Committee of the Red Cross points out that the terms "unlawful combatant", "illegal combatant" or "unprivileged combatant/belligerent" are not defined in any international agreements. The Geneva Conventions apply in wars between two or more sovereign states. Article 5 of the Third Geneva Convention states that the status of detainees whose combatant status is in doubt should be determined by a "competent tribunal". Until such time, they must be treated as prisoners of war. After a "competent tribunal" has determined that an individual is not a lawful combatant, the "detaining power" may choose to accord the individual the rights and privileges of a prisoner of war as described in the Third Geneva Convention, but is not required to do so. An individual who is not a lawful combatant, who is not a national of a neutral state, and who is not a national of a co-belligerent state, retains rights and privileges under the Fourth Geneva Convention so that he must be "treated with humanity and, in case of trial, shall not be deprived of the rights of fair and regular trial". While the concept of an unlawful combatant is included in the Third Geneva Convention, the phrase itself does not appear in the document. Article 4 of the Third Geneva Convention does describe categories under which a person may be entitled to POW status. There are other international treaties that deny lawful combatant status for mercenaries and children. In the United States, the Military Commissions Act of 2006 codified the legal definition of this term and invested the U.S. President with broad discretion to determine whether a person may be designated an unlawful enemy combatant under United States law. The assumption that unlawful combatant status exists as a separate category to lawful combatant and civilian is contradicted by the findings of the International Criminal Tribunal for the Former Yugoslavia in the Celebici Judgment. The judgment quoted the 1958 International Committee of the Red Cross (ICRC) commentary on the Fourth Geneva Convention: "Every person in enemy hands must be either a prisoner of war and, as such, be covered by the Third Convention; or a civilian covered by the Fourth Convention. There is no intermediate status; nobody in enemy hands can be outside the law". Thus, anyone not entitled to prisoner of war status maintains the same rights as a civilian, and must be prosecuted under domestic law. Neither status exists in non-international conflict, with all parties equally protected under International Humanitarian Law. The Geneva Conventions do not recognize any status of lawfulness for combatants in conflicts not involving two or more nation states, such as during civil wars between government's forces, and insurgents. A state in such a conflict is legally bound only to observe Common Article 3 of the Geneva Conventions and may ignore all of the other Articles. But each one of them is completely free to apply all or part of the remaining Articles of the Convention.
  • 5.7K
  • 02 Dec 2022
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