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Topic Review
Crash Boats of World War 2
Crash boats, at the time known as "aircraft rescue boat" or "air-sea rescue boat" were wooden speedboats built to rescue the crew of downed United States and other Allies aircraft during World War II. US boats came from observation of British experience with High-speed launches during the Battle of Britain. By the end of World War II America had produced 300,000 planes, creating a need to have crash rescue boats stationed around the globe. These boats were fast boats used to rescue pilots, crew and passengers from downed aircraft in search and rescue, air-sea rescue missions. The boats would race out to a crash site and rescue wounded aircrew. Some speed boats built before the war were acquired and converted to be crash boats and many new boats were built. Standard crash boats were built in four lengths for World War II. The smallest standard size boat was 42 feet long. The larger boats were 63 or 85 or 104 feet long. They were built for the Army Air Forces, US Navy and some were transferred to Allies. The design was similar to patrol boats built for the war, but with less or no armament and first aid equipped. The boats were designed to be light and fast to be able to get to the downed aircrew as fast as possible. Most were used in the Pacific war across the vast South Pacific, in the Island hopping campaign. Some were station on the West Coast of the United States to support the vast training centers. Many were designated Air Rescue Boats or ARB or AVR or P or C or R Hull classification symbol. After the war most were abandoned or destroyed, a few served in the Korean war (with United States Air Force ), some sold to private and some donated to Sea Scouts.
  • 3.2K
  • 23 Nov 2022
Topic Review
Criteria for the Adoption of Sustainable Maintenance Practice
The evolution from traditional industrial maintenance to sustainable maintenance (SM) is pivotal within the existing industrial ecosystem. It represents a critical transition towards integrating sustainability principles into maintenance practices including environmental, social and economic outcomes. Increasingly focused on SM, the importance of understanding the impact of environmental initiatives and sustainability indicators becomes a focal point. However, the paradigm shift of SM is lagging in the industrial ecosystem. Although it marked a growing interest in the academic community, the lack of empirical studies and practical implications of adopting SM has been reported. Based on the Bayesian analysis, and the bibliometric and thematic analyses, the role of digital technologies in enhancing SM practices highlights the potential pathways for easier transition and applicability of sustainability-related maintenance practices.
  • 477
  • 01 Mar 2024
Topic Review
Critical Construction Data
Construction projects are inherently complex and entail extensive information processing. Thus, they require effective information management, which, in turn, requires the preservation of critical construction data (CD).
  • 285
  • 03 Jul 2023
Topic Review
Critical Energy Issues
The impact of energy related to issues, such as energy poverty, energy transition, and energy security has been heavily debated. The concept of energy poverty is considered, in general terms, as being unable to have access to regular and sufficient energy due to high cost or a lack of proper infrastructure. The definition provided by the International Energy Agency states that energy security is having uninterrupted access to energy sources at affordable prices. The concept of energy transition means a transition to clean energy. However, there are concerns that some policies that push toward environmentally sustainable energy can decrease economic development and increase poverty.
  • 369
  • 31 Jul 2023
Topic Review
Critical Heat Flux Amelioration
Critical heat flux (CHF) is the thermal limit of a phase change phenomenon where boiling occurs during heating, which suddenly decreases the efficiency of heat transfer. Ameliorating CHF by altering the boiling surface characteristics can lead to more efficiency, safety, and reliability of the system.
  • 3.1K
  • 11 Aug 2020
Topic Review
Critical Infrastructures in the Past, Present and Future
Critical infrastructures are those material resources, services, information technology systems, networks and infrastructure assets that, if damaged or destroyed, would cause serious repercussions on the crucial functions of society, including the supply chain, health, security and the economic or social well-being of the state and the population. 
  • 403
  • 28 Feb 2022
Topic Review
Critical MIM + SH Processing Parameters
Metal injection molding (MIM) combined with the use of a space holder (SH) is a very attractive route for the fabrication of highly porous titanium and titanium alloy components for biomedical applications. This approach allows fine control of the morphology, architecture, and purity of very complex net-shaped components.
  • 531
  • 13 May 2022
Topic Review
Critical Risk Factors of Implementing Public–Private Partnership Projects
Due to the fact that risks can cause project delays and increase project implementation costs, successful construction project completion requires effective and holistic risk management. Identification and evaluation of critical risk factors (CRFs) associated with different types of projects are the most significant components of accurate risk management.
  • 199
  • 07 Dec 2023
Topic Review
Critical Success Factors for Building Information Modeling Implementation
The building sector is widely acknowledged as a driving force behind national prosperity. However, there are considerable challenges to the construction industry’s transition to sustainable practices, including regarding building information modeling (BIM) technologies. The United Arab Emirates has made significant progress in the Middle East in adopting building information modelling (BIM) technologies. Green building approaches have been advanced through their incorporation into environmentally conscious building practices, with a large body of literature responding to this issue. Several projects in the United Arab Emirates have, however, made use of the complementary nature of BIM and UAE sustainable policies. However, not everybody has employed the full potential of BIM implementation in sustainable construction.
  • 454
  • 21 Jul 2023
Topic Review
Cromemco Dazzler
Cromemco's Dazzler (or TV DAZZLER) is a graphics card for S-100 bus computers. Released in 1976, it is the first commercial color bit-mapped graphics card available for microcomputers. Multiple Dazzler cards could be installed in a single machine and synced together, a feature which could, with minor modification, be used to genlock. Genlocked Dazzler cards drove ColorGraphics Weather Systems displays that generated most of the weather imagery seen on US television in the early 1980s.
  • 924
  • 11 Nov 2022
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