Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review
Characteristics of Battery Energy Storage Systems
With increasing concerns about climate change, there is a transition from high-carbon-emitting fuels to green energy resources in various applications including household, commercial, transportation, and electric grid applications. Even though renewable energy resources are receiving traction for being carbon-neutral, their availability is intermittent. To address this issue to achieve extensive application, the integration of energy storage systems in conjunction with these resources is becoming a recommended practice. Additionally, in the transportation sector, the increased demand for electric vehicles (EVs) requires the development of energy storage systems that can deliver energy for rigorous driving cycles, with lithium-ion-based batteries emerging as the superior choice for energy storage due to their high power and energy densities, length of their life cycle, low self-discharge rates, and reasonable cost. As a result, battery energy storage systems (BESSs) are becoming a primary energy storage system. 
  • 806
  • 15 Mar 2024
Biography
Frederick Terman
Frederick Emmons Terman (/ˈtɜːrmən/; June 7, 1900 – December 19, 1982) was an American professor and academic administrator. He is widely credited (together with William Shockley) as being the father of Silicon Valley.[1] Terman completed his undergraduate degree in chemistry and his master's degree in electrical engineering at Stanford University.[2] His father, Lewis Terman, a psychol
  • 804
  • 23 Nov 2022
Biography
John Cioffi
John Cioffi (born November 7, 1956) is an American electrical engineer, educator and prolific inventor who has made contributions in telecommunication system theory, specifically in coding theory and information theory. Best known as "the father of DSL,"[1] Cioffi's pioneering research was instrumental in making digital subscriber line (DSL) technology practical and has led to over 400 publicati
  • 804
  • 02 Dec 2022
Topic Review
Arms Export Control Act
The Arms Export Control Act of 1976 (Title II of Pub.L. 94–329, 90 Stat. 729, enacted June 30, 1976, codified at 22 U.S.C. ch. 39) gives the President of the United States the authority to control the import and export of defense articles and defense services. The H.R. 13680 legislation was passed by the 94th Congressional session and enacted into law by the 38th President of the United States Gerald R. Ford on June 30, 1976. The Act of Congress requires international governments receiving weapons from the United States to use the armaments for legitimate self-defense. Consideration is given as to whether the exports "would contribute to an arms race, aid in the development of weapons of mass destruction, support international terrorism, increase the possibility of outbreak or escalation of conflict, or prejudice the development of bilateral or multilateral arms control or nonproliferation agreements or other arrangements." The Act also places certain restrictions on American arms traders and manufacturers, prohibiting them from the sale of certain sensitive technologies to certain parties and requiring thorough documentation of such trades to trusted parties. When the President is aware of the possibility of violations of the AECA, the law requires a report to Congress on the potential violations. U.S. Immigration and Customs Enforcement (ICE) conducts an industry outreach program called the Project Shield America to prevent foreign adversaries, terrorists, and criminal networks from obtaining U.S. munitions and strategic technology.
  • 798
  • 09 Nov 2022
Topic Review
Liquid Metal Droplets
Droplets exist widely in nature and play an extremely important role in a broad variety of industrial processes. Typical droplets, including water and oil droplets, have received extensive attention and research, however their single properties still cannot meet diverse needs. Fortunately, liquid metal droplets emerging possess outstanding properties, including large surface tension, excellent electrical and thermal conductivity, convenient chemical processing, easy transition between liquid and solid phase state, and large-scale deformability and so on. More interestingly, liquid metal droplets with unique features can respond to external factors including electronic field, magnetic field, acoustic field, chemical field, temperature and light, exhibiting extraordinary intelligent response characteristics.
  • 797
  • 15 Apr 2022
Topic Review
Gas Dynamic Cold Spray
TIF Cold Spray (CS) (formerly gas dynamic cold spray) is a coating deposition method. Solid powders (1 to 50 micrometers in diameter) are accelerated in a supersonic gas jet to velocities up to 500–1000 m/s. During impact with the substrate, particles undergo plastic deformation and adhere to the surface. To achieve a uniform thickness the spraying nozzle is scanned along the substrate. Metals, polymers, ceramics, composite materials and nanocrystalline powders can be deposited using cold spraying. The kinetic energy of the particles, supplied by the expansion of the gas, is converted to plastic deformation energy during bonding. Unlike thermal spraying techniques, e.g., plasma spraying, arc spraying, flame spraying, or high velocity oxygen fuel (HVOF), the powders are not melted during the spraying process.
  • 795
  • 28 Nov 2022
Topic Review
Watersheds
A watershed is defined by natural topographic boundaries as an ecosystem of integrated terrestrial and aquatic systems, rather than the political boundaries, in which all of the incoming precipitation and snowmelt are collected into the stream reaches while a river basin is an area of land drained by a river, its tributaries and watersheds.
  • 791
  • 15 Mar 2021
Topic Review
CHEMICAL ENGINEERING AND COVID19
The mankind of 2020 century are facing a treamendous challange against Covid19 /  SARS-COV-2 infection . Widespread viral stunt of spreading followed by death are encasulating the whole world including China , U.S , Brazil , Africa , U.K , USSR , Middle East and finally India . On the pandemic face of Corona Virus Chemical Engineers are having many scopes to serve the following areas of specialisations . 1. SAFETY , HEALTH , ENVIRONMENT ( SHE & Public Health ) 2. Molecuar Simulation of newer antivirals with the help of Engineering Mathemations as well as Computation . 3. Emergency Planning including Personnel Protective Equipments ( PPE ) , Health Statistics Record . 4. Scope to scale-up the vaccine production 5. Global economic crunch associated with Crude oil crisis during this pandemic .      
  • 790
  • 07 Nov 2020
Topic Review
Very-Large-Scale Integration
User:RMCD bot/subject notice Very Large Scale Integration (VLSI) is the process of creating an integrated circuit (IC) by combining hundreds of thousands of transistors or devices into a single chip. VLSI began in the 1970s when complex semiconductor and communication technologies were being developed. The microprocessor is a VLSI device. Before the introduction of VLSI technology most ICs had a limited set of functions they could perform. An electronic circuit might consist of a CPU, ROM, RAM and other glue logic. VLSI lets IC designers add all of these into one chip.
  • 789
  • 26 Oct 2022
Topic Review
Social Learning Tools
Social learning tools are tools used for pedagogical and andragogical purposes that utilize social software and/or social media in order to facilitate learning through interactions between individuals and systems. The idea of setting up "social learning tools" is to make education more convenient and widespread. It also allows an interaction between users and/or the software which can bring a different aspect to learning. People can acquire knowledge by distance learning tools, for instance, Facebook, Twitter, Khan Academy and so on. Social learning tools may mediate in formal or informal learning environments to help create connections between learners, instructors and information. These connections form dynamic knowledge networks. Social learning tools are used in schools for teaching/learning and in businesses for training. Within a school environment, the use of social learning tools can affect not only the user (student) but his/her caretaker as well as his/her instructor. It brings a different approach to the traditional way of learning which affects the student and his/her support circle. Companies also use social learning tools. They used them to improve knowledge transfer within departments and across teams. Businesses use a variety of these tools to create a social learning environment. They are also used in company settings to help improve team work, problem solving, and performance in stressful situations. Social learning tools are used for people who are willing to share their good ideas/thoughts with someone else. The ideas can be related to either the academic studies or any other daily skills that we want to share with others. Social learning tools connect learning to our daily lives. It creates a learning environment more truthful to today's society. There are a couple of common elements that should be present in a social learning tool. Technology should be involved to allow physical and cognitive learning. There should be interactions between the people who use the tool and interactions with the software. Another element is trust. Users should trust the software and what other people have created.
  • 785
  • 15 Nov 2022
Topic Review
Supercapacitors
Supercapacitors are a category of energy-storage devices based on high-speed electrostatic or Faradaic electrochemical processes. The charge is mainly stored at the electrode−electrolyte interface of the active materials, such as high surface porous carbons, metal oxides, or conducting polymers. They consist of one positive electrode and one negative electrode soaked in an electrolyte and separated by an ion-permeable, electronically insulating separator.Compared with batteries, supercapacitors can supply much faster charge and discharge rates within seconds or minutes time scales but lower specific energy. Besides the high power densities, supercapacitors also have some other advantages over batteries, such as high operating safety, long cycling life, high efficiency, and high performance stability.
  • 783
  • 19 Feb 2021
Topic Review
New Pedestrianism
New Pedestrianism (NP) is a more pedestrian and ecology-oriented variation of New Urbanism in urban planning theory, founded in 1999 by Michael E. Arth, an American artist, urban/home/landscape designer, futurist, and author. NP addresses the problems associated with New Urbanism and is an attempt to solve various social, health, energy, economic, aesthetic, and environmental problems, with special focus on reducing the role of the automobile.A neighborhood or new town utilizing NP is called a Pedestrian Village. Pedestrian Villages can range from being nearly car-free to having automobile access behind nearly every house and business, but pedestrian lanes are always in front. To a large extent New Urbanism is a revival of traditional street patterns and urban design. New Pedestrianism also respects traditional town design, but seeks to further reduce the negative impact of the automobile, the use of which has increased dramatically since WWII. By eliminating the front street and replacing it with a tree-lined pedestrian lane, emphasis is placed on low-impact alternative travel such as walking and cycling. Pedestrian lanes are usually 12 to 15 feet (5 m) wide, with one smooth side for rolling conveyances such as bicycles, Segways, and skates and the other, narrower, textured side for pedestrians and wheelchairs. Eliminating the automobile street from the front allows for intimate scale plazas, fountains, pocket parks, as well as an unspoiled connection to natural features such as lakes, streams, and forests that may border or be included in a Pedestrian Village. A vast public realm is created that is free from the sight, smell, and sound of automobiles, yet automobiles are still served on a separate network. New Pedestrianism has been proposed for Kisima Kaya, a new town in Kenya, for Tiger Bay Village, FL as a solution to the homeless problem, and for new towns and neighborhoods that can be built anywhere whether as rehabilitation of existing neighborhoods, infill, edge-of-town neighborhoods, or new towns.
  • 782
  • 15 Nov 2022
Biography
Chiswell Langhorne
Colonel Chiswell Dabney Langhorne (November 4, 1843 – February 14, 1919) was an United States railroad industrialist. He was the father of Nancy Witcher Langhorne and the maternal grandfather of both Joyce Grenfell and Michael Langhorne Astor.[1] Langhorne was born in Lynchburg, Virginia at Point of Honor. He was the eldest son of John Scarsbrook Langhorne (who inherited Langhorne Mills in Ly
  • 780
  • 14 Nov 2022
Biography
Soni Oyekan
Soni Olufemi Olubunmi Oyekan is a Nigerian-United States chemical engineer, inventor, entrepreneur, author, mentor and educator.[1] Oyekan is the President and CEO of Prafis Energy Solutions, an oil refining and energy consulting company.[2] During his career he has been involved in both research and development and management at a number of major oil companies. He holds patents and has made oth
  • 779
  • 29 Dec 2022
Topic Review
Photonic Crystals in Photovoltaics
Photonic crystals are artificial structures with a spatial periodicity of dielectric permittivity on the wavelength scale. These structures come in various materials and can be constructed in 1D, 2D, and 3D formats, providing a wide range of options for customizing the material's optical properties and potential applications. One of promising application is in the field of solar energy. By utilizing PCs in the design of solar cells, researchers can enhance their performance and efficiency by improving e.g., light management and increasing light trapping capabilities. This innovation can potentially significantly improve solar cells' effectiveness of all generations.
  • 775
  • 26 Mar 2024
Topic Review
Surface Modifications on Magnesium Alloys for Biomedical Applications
Magnesium (Mg) alloys have great potential in biomedical applications due to their incomparable properties regarding other metals, such as stainless steels, Co–Cr alloys, and titanium (Ti) alloys. However, when Mg engages with body fluids, its degradation rate increases, inhibiting the complete healing of bone tissue. For this reason, it has been necessary to implement protective coatings to control the rate of degradation. 
  • 772
  • 14 Dec 2022
Topic Review
Archaeoacoustics Around the World
Acoustics has been integrated with archaeology to better understand the social and cultural context of past cultures. Specifically, public events such as rituals or ceremonies, where an appreciation of sound propagation was required to hold an event. Various acoustic techniques have been used to study archaeological sites, providing information about the building characteristics and organizational structures of ancient civilizations. Archaeoacoustics is the application of acoustics in archaeological spaces.
  • 772
  • 06 May 2023
Topic Review
Firearm (Tool)
A firearm is primarily a weapon, but can be used as a tool to project either single or multiple objects at high velocity through a controlled explosion. The firing is achieved by the gases produced through rapid, confined burning of a propellant. This process of rapid burning is technically known as deflagration. In older firearms, this propellant was typically black powder, but modern firearms use smokeless powder, cordite, or other propellants. Many firearms such as mortars do not have rifled bores to impart spin to the projectile for improved flight stability, such as is seen with firearms used as weapons, although some are rifled. The lack of rifling can prevent tangling of grappling hook lines, buoy lines, and such, although some firearms intended for use at the longest ranges in these applications are rifled.
  • 771
  • 19 Oct 2022
Topic Review
List of Gliders (B)
This is a list of gliders/sailplanes of the world, (this reference lists all gliders with references, where available) Note: Any aircraft can glide for a short time, but gliders are designed to glide for longer.
  • 769
  • 09 Oct 2022
Biography
Wesley A. Brown
Wesley Anthony Brown (April 3, 1927 – May 22, 2012) was the first African-American graduate of the United States Naval Academy (USNA) in Annapolis, Maryland.[1] He served in the United States Navy from May 2, 1944, until June 30, 1969. He was involved in both the Korean and Vietnam wars. Wesley Brown was born on April 3, 1927, in Baltimore, Maryland. He graduated from Dunbar High School in
  • 768
  • 15 Nov 2022
  • Page
  • of
  • 50
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Encyclopedia of Fungi
Encyclopedia of Digital Society, Industry 5.0 and Smart City
ScholarVision Creations
Feedback