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Topic Review
Electrodeposition of Common Metals
The electrodeposition process of metals and their alloys is widely used in the automotive, space, electronics, computing, jewelry, and other consumer items industries.
  • 1.6K
  • 15 Dec 2022
Topic Review
Fluid Reaction Models
In the fluidized bed system, the performance of the reactor is affected by the hydrodynamic behaviors of the reactor in that fluid dynamics affects both heat and mass transfer.
  • 1.6K
  • 28 Jul 2021
Topic Review
Room Temperature Sodium Sulfur Batteries
Lithium metal batteries have achieved large-scale application, but still have limitations such as poor safety performance and high cost, and limited lithium resources limit the production of lithium batteries. The construction of these devices is also hampered by limited lithium supplies. Therefore, it is particularly important to find alternative metals for lithium replacement. Sodium has the properties of rich in content, low cost and ability to provide high voltage, which makes it an ideal substitute for lithium. Sulfur-based materials have attributes of high energy density, high theoretical specific capacity and are easily oxidized. They may be used as cathodes matched with sodium anodes to form a sodium-sulfur battery. Traditional sodium-sulfur batteries are used at a temperature of about 300 °C. In order to solve problems associated with flammability, explosiveness and energy loss caused by high-temperature use conditions, most research is now focused on the development of room temperature sodium-sulfur batteries. Regardless of safety performance or energy storage performance, room temperature sodium-sulfur batteries have great potential as next-generation secondary batteries. This article summarizes the working principle and existing problems for room temperature sodium-sulfur battery, and summarizes the methods necessary to solve key scientific problems to improve the comprehensive energy storage performance of sodium-sulfur battery from four aspects: cathode, anode, electrolyte and separator.
  • 1.6K
  • 06 Apr 2021
Topic Review
Technologies in Adaptive Dynamic Building Envelopes
Adaptive Dynamic Building Envelope (ADBE) is the term used to describe envelope systems that increase the adaptability of the building skin toward changing ambient conditions, resulting in better energy efficiency and thermal comfort. ADBEs exploit the benefits of passive and active technologies that manage the energy and mass transfer between building and outdoor environment. There is a range of technologies that an ADBE can incorporate to enhance a building’s energy performance. According to their usage, they can be sorted into four categories, i.e., technologies for energy harvesting, technologies affecting heat transfer, technologies for air conditioning, and technologies for storage systems. ADBEs vary from one another based on their level of active-passiveness, and user controllability. The first characteristic is the level of how active or passive the technologies used in the final ADBE product perform. The second characteristic is the level of occupant interaction with the envelope, meaning if the user has the ability to operate some functions on the ADBE manually, or through the usage of building energy management systems.
  • 1.6K
  • 28 Mar 2022
Topic Review
Fire Engine
A fire engine, also known in some places as a fire truck or fire lorry, is a road vehicle (usually a truck) that functions as a firefighting apparatus. The primary purposes of a fire engine include transporting firefighters to an incident as well as carrying equipment for firefighting operations. Some fire engines have specialised functions, such as wildfire suppression and aircraft rescue and firefighting, and may also carry equipment for technical rescue. Many fire engines are based on commercial vehicle chassis that are further upgraded and customised for firefighting requirements. They are normally fitted with sirens and emergency vehicle lighting, as well as communication equipment such as two-way radios and mobile computer technology. The terms fire engine and fire truck are often used interchangeably to a broad range of vehicles involved in firefighting; however, in some fire departments they refer to separate and specific types of vehicle.
  • 1.6K
  • 12 Oct 2022
Topic Review
Exoskeletons
Exoskeletons are orthoses of a certain kind—devices that work in harmony and parallel with their users (humans) in order to augment physical performance and are able to complete certain tasks or movements. In order to achieve such coordination, the device must be fitted to the user’s dimensions. 
  • 1.6K
  • 12 Jan 2021
Biography
Howard Scott
Howard Scott (April 1, 1890 – January 1, 1970) was an American engineer and founder of the Technocracy movement. He formed the Technical Alliance and Technocracy Incorporated.[1] Little is known about Scott's background or his early life and he has been described as a "mysterious young man".[2] He was born in Virginia in 1890 and was of Scottish-Irish descent. He claimed to have been educat
  • 1.6K
  • 19 Dec 2022
Topic Review
Intermediate Strain Rate Testing Devices
The existing experimental tests are mainly designed to study the mechanical response of materials at various strain rates. Many researchers performed the experimental test in tension, compression, and shear (with torsion test) over a wide range of strain rates. They found out that material exhibits an increase in yield stress as well as flows stress with an increase in strain rate. It illustrates that there is a need for experimental data to study the material behaviour over the full range of strain rates, from quasi-static to high strain rate test. Many special techniques have been developed to bridge the strain rate gap between quasi-static and high strain rate testing to provide a method for an intermediate strain rate test for engineering materials. Some researchers have tried to conduct intermediate strain rate tests with standard servo-hydraulic load frames. However, the results of such tests are not accurate. The problem is that during the experiment, the whole machine is not in static equilibrium. The inertial effect influences the experimental data. The records obtained from these machines are often noisy with large oscillation. therefore, the comprehensive review is given to describes the development and evolution of the existing intermediate strain rate testing devices which includes the working principles, some critical theories, technological innovation in load measurement techniques, components of the device, basic technical assumption, and measuring techniques. In addition, some research direction on future implementation and development of an intermediate strain rate apparatus is also discussed in detail.
  • 1.6K
  • 18 Apr 2021
Topic Review
Grid Code Requirements in Ethiopia
Rapid integration of renewable energy into the electric grid has ramifications for grid management and planning. Therefore, system operators have formulated grid code requirements to ensure that the grid continues to operate in a secure, safe, and cost-effective manner. The current state of grid code in Ethiopia, as well as the need for it, is discussed here. It lays out the technological grid integration requirements, with a focus on small and microgrids, which are especially important for the integration of renewable. 
  • 1.6K
  • 08 Aug 2022
Topic Review
Natural Gas Processing
Natural gas processing plants, or fractionators, are used to purify the raw natural gas extracted from underground gas fields and brought up to the surface by gas wells. The processed natural gas, used as fuel by residential, commercial and industial consumers, is almost pure methane and is very much different from the raw natural gas.
  • 1.6K
  • 28 Sep 2022
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