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Topic Review
Digital Transformation
The conceptual definition of digital transformation (DT) is composed of five corporate activities (AT Kearney) that increase a business’s competitiveness in response to changes in the business environment, which are triggered by new digital technologies, such as big data (BD), artificial intelligence (AI), the Internet of things (IoT), smart factories (SF), cyber-physical systems (CPS), and interoperability (IOP). DT claims to maintain a sustainable business and positively impact overall business performance.
  • 1.0K
  • 28 Jun 2021
Topic Review
Autonomous Vehicle
An Autonomous Vehicle (AV), or a driverless car, or a self-driving vehicle is a car, bus, truck, or any other vehicle that is able to drive from point A to point B and perform all necessary driving operations and functions without any human intervention. An Autonomous Vehicle is normally equipped with different types of sensors to perceive the surrounding environment, including Normal Vision Cameras, Infrared Cameras, RADAR, LiDAR, and Ultrasonic Sensors.  An autonomous vehicle should be able to detect and recognise all type of road users including surrounding vehicles, pedestrians, cyclists, traffic signs, road markings, and can segment the free spaces, intersections, buildings, and trees to perform a safe driving task.  Currently, no realistic prediction expects we see fully autonomous vehicles earlier than 2030. 
  • 1.0K
  • 17 Feb 2021
Topic Review
Non-Invasive Indoor Thermal Discomfort Detection
Since 1997, scientists have been trying to utilize new non-invasive approaches for thermal discomfort detection, which promise to be more effective for comparing frameworks that need direct responses from users. Due to rapid technological development in the bio-metrical field, a systematic literature review to investigate the possibility of thermal discomfort detection at the work place by non-invasive means using bio-sensing technology was performed. Firstly, the problem intervention comparison outcome context (PICOC) framework was introduced in the study to identify the main points for meta-analysis and, in turn, to provide relevant keywords for the literature search. In total, 2776 studies were found and processed using the preferred reporting items for systematic reviews and meta-analyses (PRISMA) methodology. After filtering by defined criterion, 35 articles were obtained for detailed investigation with respect to facility types used in the experiment, amount of people for data collection and algorithms used for prediction of the thermal discomfort event. The given study concludes that there is potential for the creation of non-invasive thermal discomfort detection models via utilization of bio-sensing technologies, which will provide a better user interaction with the built environment, potentially decrease energy use and enable better productivity. There is definitely room for improvement within the field of non-invasive thermal discomfort detection, especially with respect to data collection, algorithm implementation and sample size, in order to have opportunities for the deployment of developed solutions in real life. Based on the literature review, the potential of novel technology is seen to utilize a more intelligent approach for performing non-invasive thermal discomfort prediction. The architecture of deep neural networks should be studied more due to the specifics of its hidden layers and its ability of hierarchical data extraction. This machine learning algorithm can provide a better model for thermal discomfort detection based on a data set with different types of bio-metrical variables.
  • 1.0K
  • 11 Feb 2021
Topic Review
Macchi C.200
The Macchi C.200 Saetta (Italian: Lightning), or MC.200, was a fighter aircraft developed and manufactured by Aeronautica Macchi in Italy. It was operated in various forms by the Regia Aeronautica (Italian Air Force) who used the type throughout the Second World War. The C.200 was designed by Mario Castoldi, Macchi's lead designer, to serve as a modern monoplane fighter aircraft, furnished with retractable landing gear and powered by a radial engine. It possessed excellent maneuverability and the C.200's general flying characteristics left little to be desired. Stability in a high-speed dive was exceptional, but it was underpowered and underarmed in comparison to its contemporaries. Early on, there were a number of crashes caused by stability problems, nearly resulting in the grounding of the type, which was ultimately addressed via aerodynamic modifications to the wing. From the time Italy entered the Second World War on 10 June 1940, until the signing of the armistice of 8 September 1943, the C. 200 flew more operational sorties than any other Italian aircraft. The Saetta saw operational service in Greece, North Africa, Yugoslavia, across the Mediterranean and the Soviet Union (where it obtained an excellent kill to loss ratio of 88 to 15). Its very strong all-metal construction and air-cooled engine made the aircraft ideal for conducting ground attack missions; several units flew it as a fighter-bomber. Over 1,000 aircraft had been constructed by the end of the war.
  • 1.0K
  • 31 Oct 2022
Topic Review
Tokyō
Tokyō (斗栱・斗拱, more often 斗きょう)[note 1] (also called kumimono (組物) or masugumi (斗組)) is a system of supporting blocks (斗 or 大斗, masu or daito, lit. block or big block) and brackets (肘木, hijiki, lit. elbow wood) supporting the eaves of a Japanese building, usually part of a Buddhist temple or Shinto shrine. The use of tokyō is made necessary by the extent to which the eaves protrude, a functionally essential element of Japanese Buddhist architecture. The system has however always had also an important decorative function. Like most architectural elements in Japan, the system is Chinese in origin (on the subject, see the article Dougong) but has evolved since its arrival into several original forms. In its simplest configuration, the bracket system has a single projecting bracket and a single block, and is called hitotesaki. If the first bracket and block group support a second similar one, the whole system is called futatesaki, if three brackets are present it is called mitesaki, and so on until a maximum of six brackets as in the photo to the right. Each supporting block in most cases supports, besides the next bracket, a U-shaped supporting bracket set at 90° to the first (see photos in the gallery below). The Protection of Cultural Properties logo (see gallery below) represents a tokyō, considered an element of Japanese architecture which stands for the continuity in time of cultural property protection.
  • 1.0K
  • 14 Oct 2022
Topic Review
Early Warning Systems
An Early Warning System (EWS) is an architecture that integrates monitoring and forecasting subsystems, effective communication technologies, decision-making capabilities, and response activities to reduce the impact of disasters due to hazardous events through the generation and dissemination of accurate and timely warnings.
  • 1.0K
  • 16 Mar 2022
Topic Review
Date Palm Fiber Reinforced Composites
The use of natural fibers in cementitious composites continue gaining acceptability and applicability due to the shortcomings and disadvantages of synthetic fiber; this is because natural fibers have advantages of sustainability, eco-friendliness, and economy. Biodegradable natural fibers, being low density and lightweight, with typical values of strength-to-weight ratio, aspect ratio, elastic modulus, and strength, may be competitive for substituting synthetic fibers such as glass and carbon. Indeed, natural fibers are mostly non-irritating for the skin and typically pose no troubles or issues for breathing, which is not the case with many synthetic fibers. Date palm fiber (DPF) is a natural fiber obtained as waste material from a date palm tree. In many countries, with large date production, DPF is easily available as a process by-product, with a low processing cost. Being sustainable and environmentally friendly, DPF is continuously gaining acceptability as fiber material in different composites such as concrete, mortar, gypsum composites, clay composites, and bricks.
  • 1.0K
  • 07 Jun 2022
Topic Review
Vanguard TV3
Vanguard TV3, also called Vanguard Test Vehicle Three was the first attempt of the United States to launch a satellite into orbit around the Earth. Vanguard 1A was a small satellite designed to test the launch capabilities of the three-stage Vanguard and study the effects of the environment on a satellite and its systems in Earth orbit. It was also to be used to obtain geodetic measurements through orbit analysis. Solar cells on Vanguard 1A were manufactured by Bell Laboratories. At its launch attempt on December 6, 1957, at Cape Canaveral Air Force Station , the booster ignited and began to rise, but about two seconds after liftoff, after rising about four feet (1.2 m), the rocket lost thrust and fell back to the launch pad. As it settled the fuel tanks ruptured and exploded, destroying the rocket and severely damaging the launch pad. The Vanguard satellite was thrown clear and landed on the ground a short distance away with its transmitters still sending out a beacon signal. The satellite was damaged, however, and could not be reused. It is now on display at the National Air and Space Museum of the Smithsonian Institution. The exact cause of the accident was not determined with certainty, but it appeared that the fuel system malfunctioned. Other engines of the same model were modified and did not fail.
  • 1.0K
  • 25 Oct 2022
Topic Review
Thermophotovoltaic Cell
Generally, waste heat is redundantly released into the surrounding by anthropogenic activities without strategized planning. Consequently, urban heat islands and global warming chronically increases over time. Thermophotovoltaic (TPV) systems can be potentially deployed to harvest waste heat and recuperate energy to tackle this global issue with supplementary generation of electrical energy.
  • 1.0K
  • 29 Nov 2021
Topic Review
Measurement and Signature Intelligence
Measurement and signature intelligence (MASINT) is a technical branch of intelligence gathering, which serves to detect, track, identify or describe the distinctive characteristics (signatures) of fixed or dynamic target sources. This often includes radar intelligence, acoustic intelligence, nuclear intelligence, and chemical and biological intelligence. MASINT is defined as scientific and technical intelligence derived from the analysis of data obtained from sensing instruments for the purpose of identifying any distinctive features associated with the source, emitter or sender, to facilitate the latter's measurement and identification. MASINT specialists themselves struggle with providing simple explanations of their field. One attempt calls it the “CSI” of the intelligence community, in imitation of the television series CSI: Crime Scene Investigation. This emphasizes how MASINT depends on a great many sciences to interpret data. Another possible definition calls it "astronomy except for the direction of view." The allusion here is to observational astronomy being a set of techniques that do remote sensing looking away from the earth (contrasted with how MASINT employs remote sensing looking toward the earth). Astronomers make observations in multiple electromagnetic spectra, ranging through radio waves, infrared, visible, and ultraviolet light, into the X-ray spectrum and beyond. They correlate these multispectral observations and create hybrid, often “false-color” images to give a visual representation of wavelength and energy, but much of their detailed information is more likely a graph of such things as intensity and wavelength versus viewing angle.
  • 1.0K
  • 04 Nov 2022
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