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Topic Review
Polylactic Acid
As a degradable and environmentally friendly polymer, polylactic acid, also known as polylactide, is favored by researchers and has been used as a commercial material in various studies. Lactic acid, as a synthetic raw material of polylactic acid, can only be obtained by sugar fermentation. Good biocompatibility and biodegradability have led it to be approved by the U.S. Food and Drug Administration (FDA) as a biomedical material. Polylactic acid has good physical properties, and its modification can optimize its properties to a certain extent. Polylactic acid blocks and blends play significant roles in drug delivery, implants, and tissue engineering to great effect.  This entry introduces synthesis and biological application of polylactic acid.
  • 6.2K
  • 17 Nov 2020
Topic Review
IBM Cloud Computing
IBM cloud computing is a set of cloud computing services for business offered by the information technology company IBM. IBM Cloud includes infrastructure as a service (IaaS), software as a service (SaaS) and platform as a service (PaaS) offered through public, private and hybrid cloud delivery models, in addition to the components that make up those clouds.
  • 6.2K
  • 20 Oct 2022
Topic Review
Interferometry
Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information. Interferometry is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to chemistry), quantum mechanics, nuclear and particle physics, plasma physics, remote sensing, biomolecular interactions, surface profiling, microfluidics, mechanical stress/strain measurement, velocimetry, and optometry.:1–2 Interferometers are widely used in science and industry for the measurement of small displacements, refractive index changes and surface irregularities. In most interferometers, light from a single source is split into two beams that travel different optical paths, then combined again to produce interference, however, under the some circumstances two incoherent sources can also be interfered. The resulting interference fringes give information about the difference in optical path length. In analytical science, interferometers are used to measure lengths and the shape of optical components with nanometer precision; they are the highest precision length measuring instruments existing. In Fourier transform spectroscopy they are used to analyze light containing features of absorption or emission associated with a substance or mixture. An astronomical interferometer consists of two or more separate telescopes that combine their signals, offering a resolution equivalent to that of a telescope of diameter equal to the largest separation between its individual elements.
  • 6.2K
  • 17 Nov 2022
Topic Review
Behavioral Mechanisms of Thermoregulation
Behavioral thermoregulation, in contrast, depends on voluntary decisions. Like what occurs with the physiological mechanisms, thermal stimuli are detected by the afferent pathway that transfers the message to the spinal cord and cerebral cortex, influencing the level of perceived thermal comfort and the individual’s decision to gain or lose heat. These thermoregulating behaviors entail goal-oriented actions learned through reinforcement, as was demonstrated long ago.
  • 6.2K
  • 28 Sep 2021
Topic Review
Comparison between Traditional (Passive) Learning and Active Learning
Active learning has been increasingly important in tertiary education due to its powerfully favourable impact on students’ learning attitudes and efficacy. The way that a classroom is set up has a direct impact on how well students learn and how well teachers teach. The continuous evaluation of students’ learning performance is essential for guiding future classroom renovations and creating a cutting-edge learning environment for both students and teachers.
  • 6.2K
  • 20 Jun 2023
Topic Review
Feature Detection (Computer Vision)
In computer vision and image processing feature detection includes methods for computing abstractions of image information and making local decisions at every image point whether there is an image feature of a given type at that point or not. The resulting features will be subsets of the image domain, often in the form of isolated points, continuous curves or connected regions.
  • 6.2K
  • 10 Oct 2022
Topic Review
Railway and Tourism
From the second half of the 20th century, numerous railways, especially in industrial and mining areas, were abandoned for economic reasons. The activism of the “railfans”, who are fond of trains, has made it possible to set up voluntary associations that have been the lifeblood of the beginning of projects for the recovery of the historic railway heritage and the promotion of it in a touristic sense. The railway tourism process always originates from a project for the restoration of railway heritage, possibly maintaining authenticity. The voluntary associations, along with their “railfans”, are the main stakeholder, not only preserving the rail heritage but also developing railway tourism activities. The touristic railway could regenerate the local community, with positive benefits on the local economy. Many tourists could be attracted by railway tourism destinations in that they wish to live memorable experiences related to the nostalgia of the past. 
  • 6.2K
  • 25 Jan 2022
Topic Review
Taro in West Africa
Taro [Colocasia esculenta (L.) Schott] is the most commonly cultivated species in genus Colocasia and is the fourth most consumed tuber crop globally. It is a member of family Araceae, sub-family Aroideae, and is a tropical monocotyledonous, vegetatively propagated, perennial crop grown primarily for its starchy corm or underground stem. Taro is one of the world’s oldest food crops, with its domestication dating back over 9000 years. It was probably first domesticated in Southeast Asia and thereafter spread across the world, to become one of the most important staple food crops in the Pacific Islands. It is widely distributed across Africa, Oceania, Asia, and the Americas. The crop has been largely maintained by smallholder farmers, and the species’ genetic resources have remained largely within local communities. In many societies, taro is considered a sacred plant of strong cultural importance and is used in religious festivals, domestic and agricultural rituals, and as bride price.
  • 6.2K
  • 19 Sep 2022
Topic Review
Binary Scaling
Binary scaling is a computer programming technique used typically in embedded C, DSP and assembler programs to implement non-integer operations by using the native integer arithmetic of the processor.
  • 6.2K
  • 04 Nov 2022
Topic Review
Environmental, Economic, and Social Impacts of Gasification Processes
Computer-based simulations have been used to enhance production processes, and sustainable industrial strategies are increasingly being considered in the manufacturing industry. In order to evaluate the performance of a gasification process, the Life Cycle Thinking (LCT) technique gathers relevant impact assessment tools to offer quantitative indications across different domains. Among LCT approaches, by far, the highest interest belonged to life cycle assessment (LCA), followed by life cycle cost (LCC). Only a few studies have addressed exergetic life cycle assessment (ELCA), life cycle energy assessment (LCEA), social impact assessment (SIA), consequential life cycle assessment (CLCA), and water footprint (WLCA). SimaPro® (PRé Consultants, Netherlands), GaBi® (sphere, USA), and OpenLCA (GreenDelta, Germany) demonstrated the greatest contribution. Uncertainty analysis (Monte Carlo approach and sensitivity analysis) was conducted in almost half of the investigations. Most importantly, the results confirm that it is challenging or impossible to compare the environmental impacts of the gasification process with other alternatives since the results may differ based on the methodology, criteria, or presumptions. While gasification performed well in mitigating negative environmental consequences, it is not always the greatest solution compared to other technologies.
  • 6.2K
  • 02 Aug 2022
Topic Review
Bagging on Fruit Quality
Fruit bagging consists essentially of enclosing a young fruit in a food bag by capping the bag with a ribbon or a clamp on the fruit stalk. Isolating the fruit from the external environment protects it during development from mechanical or biotic damage, especially in regions where fruits are prone to attacks by fungi, bacteria, insects and even birds.
  • 6.2K
  • 18 Mar 2021
Topic Review
PATALIPUTRA
Patna, frequently seemed simply as the capital of Bihar, possesses a historical lineage that spans millennia, making it one of the oldest constantly inhabited cities in the global. With a rich tapestry of cultural, religious, and historical significance, Patna stands as a testament to the enduring legacy of historical India.
  • 6.2K
  • 13 May 2024
Topic Review
Benefits of Agricultural Biotechnology
As agricultural production approaches a bottleneck due to limited arable lands, extreme weather, and increasing food demand, novel tools are needed to produce more resilient, efficient, and high-yielding crops to ensure global food security. Modern biotechnology tools with improved specificity and efficiency could eventually become the main driver of agricultural improvement, overcoming the limitations of conventional practices in improving crops. 
  • 6.2K
  • 23 May 2022
Topic Review
Panzer II Variants
The Panzerkampfwagen II (Pz.Kpfw.II) light tank, produced in Germany in the late 1930s and early 1940s had a wide array of variants, both as development of the light tank and for specialised tasks.
  • 6.2K
  • 02 Nov 2022
Topic Review
Socially Responsible Human Resource Management
At the intersection of corporate social responsibility (CSR) and human resource management (HRM), a specific research strand has been forming and considerably flourishing over the past years, contributing to the burgeoning academic debate of what has been called “socially responsible human resource management” (SRHRM). The SRHRM debate seeks to proactively enhance employees’ work experiences and meet their personal and social expectations in ethical and socially responsible ways.
  • 6.2K
  • 16 Feb 2022
Topic Review
Rotor Eccentricity
The rotor eccentricity is idealized as static eccentricity (SE), dynamic eccentricity (DE), or mixed eccentricity (ME), as shown in. The SE indicates that the rotor and the stator centers do not coincide, and the rotor revolves the rotor center. The DE indicates that the rotor and the stator centers do not coincide, and the rotor revolves both the stator and the rotor centers.
  • 6.2K
  • 03 Aug 2021
Topic Review
Foams and Emulsions
Foams and emulsions are collections of different kinds of bubbles or drops with particular properties. They provide exceptional sensitive bases for measuring low concentrations of molecules down to the level of traces using spectroscopy techniques, thus opening new horizons in microfluidics. The optical and spectral properties of foams and emulsions provide information about their micro-/nanostructures, chemical and time stability, and molecular data of their components. 
  • 6.2K
  • 19 Apr 2022
Topic Review
Civil Registration
Civil registration is the system by which a government records the vital events (births, marriages, and deaths) of its citizens and residents. The resulting repository or database has different names in different countries and even in different US states. It can be called a civil registry, civil register (but this is also an official term for an individual file of a vital event), vital records, and other terms, and the office responsible for receiving the registrations can be called a bureau of vital statistics, registry of vital records and statistics, registrar, registry, register, registry office (officially register office), or population registry. The primary purpose of civil registration is to create a legal document that can be used to establish and protect the rights of individuals. A secondary purpose is to create a data source for the compilation of vital statistics. In most countries, there is a legal requirement to notify the relevant authority of certain life events, such as births, marriages and death. The first country to establish a nationwide population register was France in 1539, using the registers of the Catholic Church. Sweden followed in 1631, on the basis of a register drawn up by the Church of Sweden on behalf of the Swedish king. The United Nations defines civil registration as "the continuous, permanent, compulsory and universal recording of the occurrence and characteristics of vital events pertaining to the population as provided through decree or regulation in accordance with the legal requirements of a country. Civil registration is carried out primarily for the purpose of establishing the legal documents required by law. These records are also a main source of vital statistics. Complete coverage, accuracy and timeliness of civil registration are essential to ensure the quality of vital statistics." Vital events that are typically recorded on the register include live birth, death, foetal death, name, change of name, marriage, divorce, annulment of marriage, judicial separation of marriage, adoption, legitimization and recognition. Among the legal documents that are derived from civil registration are birth certificates, death certificates, and marriage certificates. A family register is a type of civil register which is more concerned with events within the family unit and is common in Continental European and Asian countries, such as Germany (Familienbuch), France, Spain, Russia (Propiska), China (Hukou), Japan (Koseki), and North and South Korea (Hoju). Additionally, in some countries, immigration, emigration, and any change of residence may require notification. A register of residents is a type of civil register primarily concerned with the current residence.
  • 6.2K
  • 07 Nov 2022
Topic Review
Synthesis of Poly (Butylene Succinate)
The impact of plastics on the environment can be mitigated by employing biobased and/or biodegradable materials (i.e., bioplastics) instead of the traditional “commodities”. In this context, poly (butylene succinate) (PBS) emerges as one of the most promising alternatives due to its good mechanical, thermal, and barrier properties, making it suitable for use in a wide range of applications. Still, the PBS has some drawbacks, such as its high crystallinity, which must be overcome to position it as a real and viable alternative to “commodities”. 
  • 6.2K
  • 25 Mar 2022
Topic Review
Isosceles Triangle
In geometry, an isosceles triangle (/aɪˈsɒsəliːz/) is a triangle that has at least two sides of equal length. Sometimes it is specified as having exactly two sides of equal length, and sometimes as having at least two sides of equal length, the latter version thus including the equilateral triangle as a special case. Examples of isosceles triangles include the isosceles right triangle, the golden triangle, and the faces of bipyramids and certain Catalan solids. The mathematical study of isosceles triangles dates back to ancient Egyptian mathematics and Babylonian mathematics. Isosceles triangles have been used as decoration from even earlier times, and appear frequently in architecture and design, for instance in the pediments and gables of buildings. The two equal sides are called the legs and the third side is called the base of the triangle. The other dimensions of the triangle, such as its height, area, and perimeter, can be calculated by simple formulas from the lengths of the legs and base. Every isosceles triangle has an axis of symmetry along the perpendicular bisector of its base. The two angles opposite the legs are equal and are always acute, so the classification of the triangle as acute, right, or obtuse depends only on the angle between its two legs.
  • 6.2K
  • 07 Nov 2022
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