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Topic Review
Weather Radar
The history of Weather Radar (abbreviation of RAdio Detecting And Ranging) begins during World War II, when military radar operators noticed extraneous echoes showing up on their display. David Atlas was one of the pioneers of radar meteorology, along with John Stewart Marshall, Walter Palmer and Richard Doviak. Weather radars send pulses of electromagnetic energy into the atmosphere, a microsecond of long microwave radiation to identify the presence of hydrometeors.
  • 1.7K
  • 17 Feb 2022
Topic Review
Organic Piezoelectric Biomaterials
The past decade has witnessed significant advances in medically implantable and wearable devices technologies as a promising personal healthcare platform. Organic piezoelectric biomaterials have attracted widespread attention as the functional materials in the biomedical devices due to their advantages of excellent biocompatibility and environmental friendliness. Biomedical devices featuring the biocompatible piezoelectric materials involve energy harvesting devices, sensors, and scaffolds for cell and tissue engineering. This paper offers a comprehensive review of the principles, properties, and applications of organic piezoelectric biomaterials. How to tackle issues relating to the better integration of the organic piezoelectric biomaterials into the biomedical devices is discussed. Further developments in biocompatible piezoelectric materials can spark a new age in the field of biomedical technologies.
  • 1.7K
  • 30 Oct 2020
Topic Review
Gaspee Affair
Script error: No such module "Infobox military conflict". The Gaspee Affair was a significant event in the lead-up to the American Revolution. HMS Gaspee was a British customs schooner that had been enforcing the Navigation Acts in and around Newport, Rhode Island in 1772. It ran aground in shallow water while chasing the packet ship Hannah on June 9 near Gaspee Point in Warwick, Rhode Island. A group of men led by Abraham Whipple and John Brown attacked, boarded, and torched the ship. The event increased tensions between the American colonists and British officials, following the Boston Massacre in 1770. British officials in Rhode Island wanted to increase their control over trade—legitimate trade as well as smuggling—in order to increase their revenue from the small colony. But Rhode Islanders increasingly protested the Stamp Act, the Townshend Acts, and other British impositions that had clashed with the colony's history of rum manufacturing, maritime trade, and slave trading. This event and others in Narragansett Bay marked the first acts of violent uprising against the British crown's authority in America, preceding the Boston Tea Party by more than a year and moving the Thirteen Colonies as a whole toward the war for independence.
  • 1.7K
  • 18 Oct 2022
Topic Review
Recycling and Reuse of Mine Tailings
Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air environments. It reached 7 billion tonnes of mine tailings generated yearly worldwide, and 19 billion solid tailings will be accumulated by 2025.
  • 1.7K
  • 02 Sep 2022
Topic Review
Multiple Attribute-based Decision-making Models
Sustainability of agricultural practices depends on economic, environmental, and social conditions. The Rajasthan state of India has arid climatic conditions where kharif crops are commonly grown. In this work, the four major criteria are considered such as the farm area, crop yield per unit area, the cost prices, and the market sales price. Merged analytic hierarchy process (AHP) and entropy techniques have been employed to give reasonable weight coefficients for the objective and subjective weights to each criterion. Multiple attribute-based decision-making models (MADM) have been developed using three proven techniques, namely the Exprom2, the technique for order of preference by similarity to ideal solution (TOPSIS), and the VlseKriterijumska Optimizacija I KompromisnoResenje (VIKOR). The crop Pennisetum glaucum emerged as the most productive kharif crop in the arid climatic conditions of Rajasthan, India under the given criteria. The sensitivity analysis of the three methods identifies the most significant criteria and validates that Pennisetum glaucum is the first ranked crop despite the interchange of the weights. The methodology used in this study may be applied across the globe to select appropriate crops for maximizing the profit, optimizing the natural resources, and promoting sustainable agricultural practices. This study may be used to enhance the agricultural gross domestic product (GDP) to make the agriculturalists self-sufficient and to help the state policymakers in making elective regional policies.
  • 1.7K
  • 05 Nov 2020
Topic Review
Electrochemical Cell
An electrochemical cell is a device capable of either generating electrical energy from chemical reactions or using electrical energy to cause chemical reactions. The electrochemical cells which generate an electric current are called voltaic cells or galvanic cells and the other ones are called electrolytic cells which are used to drive chemical reactions like electrolysis. A common example of an galvanic cells is a standard 1.5 volt cell meant for consumer use. A battery consists of one or more cells, connected either in parallel, series or series-and-parallel pattern.
  • 1.7K
  • 08 Oct 2022
Topic Review
Comparison of Single-Board Computers
Comparison of single-board computers excluding single-board microcontrollers.
  • 1.7K
  • 09 Oct 2022
Topic Review
Guided Wave Ultrasonic Testing
Guided wave ultrasonic testing (GWUT) method is an effective method for long-distance inspection of inaccessible and coated structures from a single point of testing. It propagates inspection wave all through the structure without point-to-point scanning, hence, minimizes inspection drudgery and enhances work throughput per day.
  • 1.7K
  • 25 Feb 2021
Topic Review
4D Printing
4D printing is the fabrication process of 3D objects that can change their shape over time or in response to an environmental stimulus. This process demonstrates a radical shift in additive manufacturing.
  • 1.7K
  • 20 Apr 2021
Topic Review
Electric Vehicles in Hong Kong
The adoption of electric vehicles in Hong Kong is actively supported by the HK government, which recognizes battery electric vehicles, plug-in hybrids, and conventional hybrid electric vehicles to be environmentally friendly and eligible for financial incentives. As of 31 October 2017, there were 11,039 electric vehicles in Hong Kong, up from less than 100 in 2010. At present, 73 EV models from eight countries have been approved by the Transport Department to be eligible for the incentives. These include 51 models for private cars and motorcycles and 22 models for public transport and commercial vehicles.
  • 1.7K
  • 21 Nov 2022
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