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Topic Review
The Polyethylene Terephthalate
The chemical recycling of PET is reviewed, such as pyrolysis, hydrolysis, methanolysis, glycolysis, ionic-liquid, phase-transfer catalysis and combination of glycolysis–hydrolysis, glycolysis–methanolysis and methanolysis–hydrolysis. 
  • 3.2K
  • 08 May 2021
Topic Review
Poly(vinylidene fluoride) Phase Structure and Identification
Poly(vinylidene fluoride) (PVDF) is one of the most interesting semicrystalline polymers and is often used in sensors, actuators, energy harvesters, etc., because of its high biocompatibility, film-forming ability, low cost, excellent chemical stability, and good electroactive characteristics, including piezo-, pyro-, and ferro-electric properties.
  • 3.2K
  • 30 Jun 2023
Topic Review
Terahertz Emitter Using Resonant-Tunneling Diode
The terahertz (THz) band, which has a frequency of about 0.1 to several THz, is expected to play key roles in various applications, such as imaging, chemical and bio-technological analyses, and communications. Compact solid-state THz sources are important devices for these applications and various kinds of such sources have been studied, comprising both optical and electronic devices, as the THz band is located between millimeter and light waves.
  • 3.2K
  • 08 Apr 2021
Topic Review
Digital Marketing
The concept of digital marketing is based on a combination of traditional marketing tools and online technologies enabled by the internet in the 1990s . Its synonyms include but are not limited to digital marketing, electronic marketing, e-marketing, and online marketing.
  • 3.2K
  • 22 Jul 2021
Topic Review
Amino Acid Transporters
The conventional function of amino acid transporters in mammalian cells is in the maintenance of amino acid homeostasis. Every cell has a need for amino acids from extracellular sources, particularly for the essential amino acids that mammalian cells are not able to synthesize. This need cannot be met without the participation of specific transporters in the plasma membrane because of the hydrophilic nature of these amino acids, a feature that prevents their simple diffusion across the hydrophobic lipid bilayer. 
  • 3.2K
  • 02 Mar 2022
Biography
Ishfaq Ahmad
Ishfaq Ahmad, D.Sc., Minister of State, SI, HI, NI, FPAS (3 November 1930 – 18 January 2018), was a Pakistani nuclear physicist, emeritus professor of high-energy physics at the National Center for Physics, and former science advisor to the Government of Pakistan.[1] A versatile theoretical physicist,[2] Ahmad made significant contributions in the theoretical development of the applications a
  • 3.2K
  • 15 Nov 2022
Topic Review
Motion Capture Technology
Motion capture (MoCap) is the process of digitally tracking and recoding the movements of objects or living beings in space.
  • 3.2K
  • 14 Oct 2020
Topic Review
Addressing, Assessing and Improving Water Security
Water security is about managing too much, too little and/or too polluted water. Water security is about the increasing importance of sustainable management of water resources, drinking water and human well-being and protection of life and property from water-related disasters. Water security is about the health of ecosystems and economic development.  A groundwork of this broad and multi-faceted concept is presented to facilitate understanding, measuring and improving water security. 
  • 3.2K
  • 25 Jan 2022
Topic Review
Helleborus
Commonly known as hellebores (/ˈhɛlɪbɔːrz/), the Eurasian genus Helleborus consists of approximately 20 species of herbaceous or evergreen perennial flowering plants in the family Ranunculaceae, within which it gave its name to the tribe of Helleboreae. Despite names such as "winter rose", "Christmas rose" and "Lenten rose", hellebores are not closely related to the rose family (Rosaceae). Many hellebore species are poisonous.
  • 3.2K
  • 24 Nov 2022
Topic Review
Classifications of Routing Protocols in Ad hoc Networks
Wireless Mobile Ad-hoc Networks (WANETs-MANETs) are one of the most in-demand networks in our day and age, being widely used in military fields, disaster environments, autonomous robots, vehicular networks, rural and urban environments, and UAV applications. This is due to the remarkable features of versatility, robustness, and self-configuration with no infrastructure. Such networks' main objective is to deliver reliable data transmission directly to nodes such routers, access points, smartphones, and vehicles with dynamically adjusting the data routes in accordance with the network conditions and GPS information. However, mobility in ad hoc networks is yet the crucial issue due to the dynamic changes of the network topology; this makes data routing a substantial challenge. To this end, choosing or design the proper routing protocol plays important role in establishing robust, secure and efficient data communication for randomly distributed and unrestricted movement of nodes.
  • 3.2K
  • 10 Oct 2023
Topic Review
Sensory Characterization Techniques
Sensory science provides objective information about the consumer understanding of a product, the acceptance or rejection of stimuli, and the description of the emotions evoked. It is possible to answer how consumers perceive a product through discriminative and descriptive techniques. 
  • 3.2K
  • 11 Mar 2022
Topic Review
Drama Therapy
Drama therapy is the use of theatre techniques to facilitate personal growth and promote mental health. Drama therapy is used in a wide variety of settings, including hospitals, schools, mental health centers, prisons, and businesses. Drama therapy, as a modality of the creative arts therapies, exists in many forms and can apply to individuals, couples, families, and various groups.
  • 3.2K
  • 23 Nov 2022
Topic Review
Asterism
An asterism is an observed pattern or group of stars in the sky. Asterisms can be any identified pattern or group of stars, and therefore are a more general concept than the formally defined 88 constellations. Constellations are based on asterisms, but unlike asterisms, constellations outline and today completely divide the sky and all its celestial objects into regions around their central asterisms. For example, the asterism known as the Big Dipper comprises the seven brightest stars in the constellation Ursa Major. Another is the asterism of the Southern Cross, within the constellation of Crux. Asterisms range from simple shapes of just a few stars to more complex collections of many stars covering large portions of the sky. The stars themselves may be bright naked-eye objects or fainter, even telescopic, but they are generally all of a similar brightness to each other. The larger brighter asterisms are useful for people who are familiarizing themselves with the night sky. The patterns of stars seen in asterisms are not necessarily a product of any physical association between the stars, but are rather the result of the particular perspectives of their observations. For example the Summer Triangle is a purely observational physically unrelated group of stars, but the stars of Orion's Belt are all members of the Orion OB1 association and five of the seven stars of the Big Dipper are members of the Ursa Major Moving Group. Physical associations, such as the Hyades or Pleiades, can be asterisms in their own right and part of other asterism at the same time.
  • 3.2K
  • 29 Nov 2022
Topic Review
Measuring Biosignals with Single Circuit Boards
To measure biosignals constantly, using textile-integrated or even textile-based electrodes and miniaturized electronics, is ideal to provide maximum comfort for patients or athletes during monitoring. While in former times, this was usually solved by integrating specialized electronics into garments, either connected to a handheld computer or including a wireless data transfer option, nowadays increasingly smaller single circuit boards are available, e.g., single-board computers such as Raspberry Pi or microcontrollers such as Arduino, in various shapes and dimensions.
  • 3.2K
  • 01 Mar 2022
Topic Review
Properties of Anthocyanins
Anthocyanins are a subgroup of flavonoids, which are a prevalent and numerous class of secondary plant metabolites, that all share the C6-C3-C6 flavan or 2-phenyl-benzodihydorpyrane skeleton.
  • 3.2K
  • 14 Sep 2021
Topic Review
Cold War (General Term)
A cold war is a state of conflict between nations that does not involve direct military action but is pursued primarily through economic and political actions, propaganda, acts of espionage or proxy wars waged by surrogates. This term is most commonly used to refer to the American-Soviet Cold War of 1947–1991. The surrogates are typically states that are satellites of the conflicting nations, i.e., nations allied to them or under their political influence. Opponents in a cold war will often provide economic or military aid, such as weapons, tactical support or military advisors, to lesser nations involved in conflicts with the opposing country.
  • 3.2K
  • 26 Oct 2022
Topic Review
Population and Housing Censuses by Country
This is a list of national population and housing censuses.
  • 3.2K
  • 20 Oct 2022
Topic Review
Solar PV Monitoring
Solar Photovoltaic (PV) energy is a clean, attractive, and secure source of electricity generation. Due to its expanse usage around the globe, the development of an advanced monitoring method is crucial. PV performance can be affected by various environmental factors such as soiling, temperature, irradiance etc. Thus, solar PV accuracy and performance can be improved by employing an efficient solar PV real-time monitoring system. 
  • 3.2K
  • 12 Aug 2021
Topic Review Peer Reviewed
Ontologies in Knowledge Organization
Within the knowledge organization systems (KOS) set, the term “ontology” is paradigmatic of the terminological ambiguity in different typologies. Contributing to this situation is the indiscriminate association of the term “ontology”, both as a specific type of KOS and as a process of categorization, due to the interdisciplinary use of the term with different meanings. We present a systematization of the perspectives of different authors of ontologies, as representational artifacts, seeking to contribute to terminological clarification. Focusing the analysis on the intention, semantics and modulation of ontologies, it was possible to notice two broad perspectives regarding ontologies as artifacts that coexist in the knowledge organization systems spectrum. We have ontologies viewed, on the one hand, as an evolution in terms of complexity of traditional conceptual systems, and on the other hand, as a system that organizes ontological rather than epistemological knowledge. The focus of ontological analysis is the item to model and not the intentions that motivate the construction of the system. 
  • 3.2K
  • 13 Apr 2022
Topic Review
Autonomous Vehicle Guideline for Public Road-Testing Sustainability
Numerous countries have developed guidelines for public road testing, but those rules are not uniform, and discrepancies occur between nations. Issues such as vehicular safety, registrations, authority, insurance, cybersecurity, and infrastructures weigh differently in each country. Rather than relying on a single national standard as a reference, an amalgam of guidelines from different countries allows a more holistic and measured view of AV testing practices. Synthesizing these diverse national regulations into global guidelines would promote the safety and sustainability of autonomous vehicle testing and benefit all parties interested in autonomous vehicles.
  • 3.2K
  • 17 Feb 2022
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