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Topic Review
Ultrasensitive Magnetic Field Sensors
One of the cutting-edge topics today is the use of magnetic field sensors for applications such as magnetocardiography, magnetotomography, magnetomyography, magnetoneurography, or their application in point-of-care devices. Types of magnetic field sensors include direct current superconducting quantum interference devices, search coil, fluxgate, magnetoelectric, giant magneto-impedance, anisotropic/giant/tunneling magnetoresistance, optically pumped, cavity optomechanical, Hall effect, magnetoelastic, spin wave interferometry, and those based on the behavior of nitrogen-vacancy centers in the atomic lattice of diamond. Current developments of magnetometry in biological diagnostics are revised in review paper DOI: 10.3390/s20061569.
  • 2.7K
  • 11 Jun 2021
Topic Review
Italic Languages
The Italic languages are a subfamily of the Indo-European language family, originally spoken by Italic peoples. They include Latin and its descendants (the Romance languages) as well as a number of extinct languages of the Italian Peninsula, including Umbrian, Oscan, Faliscan, South Picene, and possibly Venetic and Sicel. With over 800 million native speakers, the Italic languages are the second most widely spoken branch of the Indo-European family, after the Indo-Iranian languages. In the past, various definitions of "Italic" have prevailed. This article uses the classification presented by the Linguist List: Italic includes the Latin subgroup (Latin and the Romance languages) as well as the ancient Italic languages (Faliscan, Osco-Umbrian and two unclassified Italic languages, Aequian and Vestinian). Venetic (the language of the ancient Veneti), as revealed by its inscriptions, shared some similarities with the Italic languages and is sometimes classified as Italic. However, since it also shares similarities with other Western Indo-European branches (particularly Celtic languages), some linguists prefer to consider it as an independent Indo-European language. In the extreme view, Italic did not exist, but the different groups descended directly from Indo-European and converged because of geographic contiguity. That view stems in part from the difficulty in identifying a common Italic homeland in prehistory. In the intermediate view, the Italic languages are one of the ten or eleven major subgroups of the Indo-European language family and might therefore have had an ancestor, Common Italic or Proto-Italic from which its daughter languages descended. Moreover, there are similarities between major groups, but how the similarities are to be interpreted is one of the major debated issues in the historical linguistics of Indo-European. The linguist Calvert Watkins went so far as to suggest, among the ten major groups, a four-way division of East, West, North and South Indo-European. He considered them to be "dialectical divisions within Proto-Indo-European which go back to a period long before the speakers arrived in their historical areas of attestation". It is not to be considered a nodular grouping; in other words, there was not necessarily any common west Indo-European serving as a node from which the subgroups branched but a hypothesised similarity between the dialects of Proto-Indo-European that developed into the recognised families. Although generally regarded as a single branch that diversified from a Common or Proto-Italic stage, after the Proto-Indo-European period, some authors doubt this common affiliation. All the Italic languages share a number of common isoglosses; thus, all of them are centum languages that do not present palatalization of the Indo-European (palatal) velars /*k, *kʷ, *g, *gʰ, *gʰʷ/. The Romance languages present a later palatalization of Latin phonemes /k, g/, although only before phonemes /ɛ, e, i/.
  • 2.7K
  • 17 Nov 2022
Topic Review
Sound Vibration on Human Health
This entry presents a narrative review of research literature to “map the landscape” of the mechanisms of the effect of sound vibration on humans including the physiological, neurological, and biochemical. It begins by narrowing music to sound and sound to vibration. The focus is on low frequency sound (up to 250 Hz) including infrasound (1–16 Hz). Types of application are described and include whole body vibration, vibroacoustics, and focal applications of vibration. Literature on mechanisms of response to vibration is categorized into hemodynamic, neurological, and musculoskeletal. Basic mechanisms of hemodynamic effects including stimulation of endothelial cells and vibropercussion; of neurological effects including protein kinases activation, nerve stimulation with a specific look at vibratory analgesia, and oscillatory coherence; of musculoskeletal effects including muscle stretch reflex, bone cell progenitor fate, vibration effects on bone ossification and resorption, and anabolic effects on spine and intervertebral discs. In every category research on clinical applications are described. The conclusion points to the complexity of the field of vibrational medicine and calls for specific comparative research on type of vibration delivery, amount of body or surface being stimulated, effect of specific frequencies and intensities to specific mechanisms, and to greater interdisciplinary cooperation and focus. 
  • 2.7K
  • 21 Jun 2021
Topic Review
Hydroxytyrosol in Food Products
Hydroxytyrosol (HT) is an amphipathic functional phenol found in the olive tree, both in its leaves and fruits, in free or bound forms, as well as in olive oil and by-products of olive oil manufacture. It is recognized as safe by the European Food Safety Authority (EFSA) and Food and Drug Administration (FDA) and has obvious health effect when consumed regularly with the prerequisite to contain at least 5 mg/20 g oil of HT and related compounds. According to the dietary data from the European Union, it is estimated that the mean values of HT consumption in adults is far from the daily recommended intake, which relays the importance of the incorporation of HT in other types of products.
  • 2.7K
  • 23 Dec 2020
Topic Review
Gastric Cancer Classification
Gastric cancer(GC) is the fourth most common cause of cancer-related mortalities worldwide. The incidence rate of GC rises progressively with age, the median age at diagnosis is 70 years. GC is a multifactorial disease, and both environmental and genetic factors have a role in its aetiology. Regarding the age of diagnosis, it is divided into early-onset gastric carcinoma (EOGC; 45 years or younger) and conventional GC (CGC; older than 45). EOGC relies mostly on genetic factors and therefore provides a unique model to study genetic alterations in GCs.
  • 2.7K
  • 27 Oct 2020
Topic Review
Radeon HD 7000 Series
The Radeon HD 7000 Series, based on "Southern Islands", is further products series in the family of Radeon GPUs developed by AMD. AMD builds Southern Islands series graphics chips based on the 28 nm manufacturing process at TSMC. The primary competitor of Southern Islands, Nvidia's GeForce 600 Series (also manufactured at TSMC), also shipped during Q1 2012, largely due to the immaturity of the 28 nm process.
  • 2.7K
  • 08 Nov 2022
Topic Review
Superior Orders
Superior orders, also known as the Nuremberg defense or just following orders, is a plea in a court of law that a person, whether a member of the military, law enforcement, a firefighting force, or the civilian population, should not be considered guilty of committing actions that were ordered by a superior officer or official. The superior orders plea is often regarded as the complement to command responsibility. One of the most noted uses of this plea, or defense, was by the accused in the 1945–1946 Nuremberg trials, such that it is also called the "Nuremberg defense". The Nuremberg trials were a series of military tribunals, held by the main victorious Allies after World War II, most notable for the prosecution of prominent members of the political, military, and economic leadership of the defeated Nazi Germany. These trials, under the London Charter of the International Military Tribunal that established them, determined that the defense of superior orders was no longer enough to escape punishment, but merely enough to lessen punishment. Historically, the plea of superior orders has been used both before and after the Nuremberg Trials, with inconsistent rulings. Apart from the specific plea of superior orders, discussions about how the general concept of superior orders ought to be used, or ought not to be used, have taken place in various arguments, rulings and statutes that have not necessarily been part of "after the fact" war crimes trials, strictly speaking. Nevertheless, these discussions and related events help to explain the evolution of the specific plea of superior orders and the history of its usage.
  • 2.7K
  • 08 Nov 2022
Topic Review
Compositional Engineering of Perovskites
We give a systematic overview of compositional engineering by distinguishing the different defect-reducing mechanisms. Doping effects are divided into influences on: (1) crystallization; (2) lattice properties. Incorporation of dopant influences the lattice properties by: (a) lattice strain relaxation; (b) chemical bonding enhancement; (c) band gap tuning. The intrinsic lattice strain in undoped perovskite was shown to induce vacancy formation. The incorporation of smaller ions, such as Cl, F and Cd, increases the energy for vacancy formation. Zn doping is reported to induce strain relaxation but also to enhance the chemical bonding. The combination of computational studies using (DFT) calculations quantifying and qualifying the defect-reducing propensities of different dopants with experimental studies is essential for a deeper understanding and unraveling insights, such as the dynamics of iodine vacancies and the photochemistry of the iodine interstitials, and can eventually lead to a more rational approach in the search for optimal photovoltaic materials.
  • 2.7K
  • 28 Oct 2020
Topic Review
HVAC Systems of Smart Building
Early fault detection and diagnosis in heating, ventilation and air conditioning (HVAC) systems may reduce the damage of equipment, improving the reliability and safety of smart buildings, generating social and economic benefits. Data models for fault detection and diagnosis are increasingly used for extracting knowledge in the supervisory tasks. This article proposes an autonomic cycle of data analysis tasks (ACODAT) for the supervision of the building’s HVAC systems. Data analysis tasks incorporate data mining models for extracting knowledge from the system monitoring, analyzing abnormal situations and automatically identifying and taking corrective actions. This article shows a case study of a real building’s HVAC system, for the supervision with our ACODAT, where the HVAC subsystems have been installed over the years, providing a good example of a heterogeneous facility. The proposed supervisory functionality of the HVAC system is capable of detecting deviations, such as faults or gradual increment of energy consumption in similar working conditions. The case study shows this capability of the supervisory autonomic cycle, usually a key objective for smart buildings.
  • 2.7K
  • 01 Jun 2021
Topic Review
Zone Refining
Zone refining is a technology of deeply purifying metals. Its essence is to use the difference in solubility of impurity elements in the solid and molten state of the main metal to precipitate the impurities or change the distribution of the impurity elements. It provides an effective and easy method for preparing high-purity metals. 
  • 2.7K
  • 18 May 2021
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