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Topic Review
Transport Membrane Condenser Heat Exchangers
The transport membrane condensers (TMC) process can be considered as a hybrid of a heat exchanger and membrane condensers. 
  • 946
  • 12 Jan 2021
Topic Review
Transport Environmental Effects of Urban Road Network
As both developing and developed countries continue to urbanize, rapid urban growth is anticipated, particularly in low- and middle-income countries. This will inevitably lead to enhancements in economic development, as well as the expansion of production, population, employment, travel demand, and freight transport demand in urban road networks. Transport can potentially lead to multiple social and environmental effects, such as difficulty with access, social severance, pedestrian accident risk, higher noise levels, greater air pollution, global warming, climate change, and other adverse consequences. 
  • 239
  • 25 Dec 2023
Topic Review
Transponder Timing
Transponder timing (also called chip timing or RFID timing) is a technique for measuring performance in sport events. A transponder working on a radio-frequency identification (RFID) basis is attached to the athlete and emits a unique code that is detected by radio receivers located at the strategic points in an event. Prior to the use of this technology, races were either timed by hand (with operators pressing a stopwatch) or using video camera systems.
  • 588
  • 27 Sep 2022
Topic Review
Transparent Wood Composites
Transparent wood composites are novel wood materials which have up to 90% transparency and some higher mechanical properties than wood itself, made for the first time in 1992. When these materials are made commercially available, a significant benefit is expected due to their inherent biodegradable properties; however, this has the axiomatic disadvantage of being problematic for long-term construction. These materials are significantly more biodegradable than glass and plastics. Transparent wood is also shatterproof. On the other hand, concerns may be relevant due to the use of non-biodegradable plastics for long-lasting purposes such as in buildings. File:Example of Transparent Wood and Light diffusion.webm
  • 825
  • 11 Nov 2022
Topic Review
Transparent Nano-Ceramics for Solid-State LASERs
Solid-state lasers play a leading role in the field of laser application because they have the advantages of high peak power, high efficiency, long service life, safety, and reliability.
  • 429
  • 20 May 2022
Topic Review
Transmission (Mechanics)
A transmission is a machine in a power transmission system, which provides controlled application of power. Often the term 5-speed transmission refers simply to the gearbox, that uses gears and gear trains to provide speed and torque block conversions from a rotating power source to another device. The term transmission properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differential, and final drive shafts. In the United States the term is sometimes used in casual speech to refer more specifically to the gearbox alone, and detailed usage differs. The most common use is in motor vehicles, where the transmission adapts the output of the internal combustion engine to the drive wheels. Such engines need to operate at a relatively high rotational speed, which is inappropriate for starting, stopping, and slower travel. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are also used on pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted. Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as the speed varies. This switching may be done manually (by the operator) or automatically (by a control unit). Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply change the speed and torque (and sometimes direction) of motor output. In motor vehicles, the transmission generally is connected to the engine crankshaft via a flywheel or clutch or fluid coupling, partly because internal combustion engines cannot run below a particular speed. The output of the transmission is transmitted via the driveshaft to one or more differentials, which drive the wheels. While a differential may also provide gear reduction, its primary purpose is to permit the wheels at either end of an axle to rotate at different speeds (essential to avoid wheel slippage on turns) as it changes the direction of rotation. Conventional gear/belt transmissions are not the only mechanism for speed/torque adaptation. Alternative mechanisms include torque converters and power transformation (e.g. diesel-electric transmission and hydraulic drive system). Hybrid configurations also exist. Automatic transmissions use a valve body to shift gears using fluid pressures in response to engine RPM, speed, and throttle input.
  • 1.9K
  • 01 Nov 2022
Topic Review
Transition Process of Low-Head Pumping Station
The transition process of the low-lift pump mainly refers to the start–stop process. Due to the opening and closing of the gate, the sudden change in the flow velocity in the pipeline causes the water hammer phenomenon. This hydraulic process is called the transition process. Experience shows that hydraulic machinery accidents mainly occur in the transition process. Therefore, the study of the start–stop transition process of the pump has an important guiding significance for the safe operation of the pumping station.
  • 461
  • 25 Nov 2022
Topic Review
Transition from Industry 4.0 to Society 5.0
In the era of Industry 4.0, manufacturing and production systems were revolutionized by increasing operational efficiency and developing and implementing new business models, services, and products. Several countries have begun orchestrating initiatives towards the design and development of the human-centric aspect of technologies, systems, and services, which has been coined as Industry 5.0. The impact of Industry 5.0 will extend to societal transformation, which eventually leads to the generation of a new society, the Society 5.0.
  • 5.7K
  • 07 Sep 2022
Topic Review
Transformers Health
Due to the large number of distribution transformers in the distribution grid, the status of distribution transformers plays an important role in ensuring the safe and reliable operation of the these grids. To evaluate the distribution transformer health, many assessment techniques have been studied and developed. These tools will support the transformer operators in predicting the status of the distribution transformer and responding effectively. A group of authors from University of Hawaii at Manoa and University of Palermo have reviewed the literature in the area, analyzed the latest techniques as well as highlighted the advantages and disadvantages of current methodologies. This gives the other researchers an overview of the development process of distribution transformer condition assessment technologies, thereby continuing to develop new effective evaluation techniques.
  • 935
  • 24 Nov 2020
Topic Review
Transformerless Multilevel Voltage-Source Inverter Topology
At present, renewable energies represent 25% of the global power generation capacity. The increase in clean energy facilities is mainly due to the high levels of pollution generated by the burning of fossil fuels to satisfy the growing electricity demand. The global capacity of generating electricity from solar energy has experienced a significant increase, reaching 505 GW in 2018. Today, multilevel inverters are used in PV systems to convert direct current into alternating current. However, the use of multilevel inverters in renewable energies applications presents different challenges; for example, grid-connected systems use a transformer to avoid the presence of leakage currents. The grid-connected systems must meet at least two international standards analyzed in this work: VDE 0126-1-1 and VDE-AR-N 4105, which establish a maximum leakage current of 300 mA and harmonic distortion maximum of 5%. Previously, DC/AC converters have been studied in different industrial applications.
  • 662
  • 07 Sep 2021
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