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Topic Review
Ytterbium Fluoride in Dental Materials
The compound ytterbium trifluoride is used as a component of several dental materials. Ytterbium trifluoride is reported to be insoluble in water. Despite this, its presence is associated with fluoride release from dental materials. There is evidence that it reacts with the components of calcium trisilicate cements to form small amounts of a variety of compounds, including ytterbium oxide, Yb2O3, and calcium–ytterbium fluoride, CaYbF5. In nanoparticulate form, it has been shown to reinforce glass polyalkenoates and it also provides high contrast in X-ray images.
  • 308
  • 12 Jan 2024
Topic Review
YTMND
YTMND, an initialism for "You're the Man Now, Dog", is an online community centered on the creation of hosted memetic (or memes) web pages (known within the community as fads, YTMNDs or sites) featuring a juxtaposition of an image (still or short animation) centered or tiled along with optional large zooming text and a looping sound file. Images and sound files used in YTMNDs are usually either created or edited by users. YTMND is generally considered to be a humor website, owing its tone and culture to the original YTMND and its early imitators.
  • 1.3K
  • 15 Nov 2022
Topic Review
YSD-11 Class Seaplane Wrecking Derrick
YSD-11 Class Seaplane Wrecking Derrick is a class of US Navy derrick crane ship. While listed to service seaplanes the crane was able to lift small boats and large engines also. Hull classification symbol YSD is for Yard Seaplane Dirrick, Yard as in ship repair yard. YSD-11s were used to remove broken seaplanes from the water for repair or regular maintenance. The US had 2,661 Consolidated PBY Catalina built for the war, Canada built 620. Other seaplanes built in mass production were the 1,366 Martin PBM Mariner, 749 Short Sunderland and 345 Grumman G-21 Goose. The YSD-11 Class Derrick was built to support World War 2, having a displacement of 220 tons no load and 270 tons loaded. The YSD-11 Class had a length 104 feet; a beam of 31 feet and 2 inches; a draft of 4 feet. They had a top speed 10 knots, built with a steel hull. The ship had one American Hoist & Derrick model 685 rotating crane. The crane had a boom of 54 feet with a lifting capacity of 10 tons. The crane was powered by a 6-cylinder Cummins Diesel engine. The ship housed a crew of one Officer and 15 Enlisted men. The ships had a diving gear locker for the crew salvage work. For service power, the ship had two generators: one 30Kw Diesel engine to electric generator and one 20Kw Diesel Generator. Ship power was from two Superior model MRDB-8 200 HP Diesel engines with two propellers, 640shp. The YSD-11 Class Derricks were built by a number of United States shipyards, including Moore Equipment Company, Puget Sound Navy Yard, Charleston Navy Yard, Mare Island Naval Shipyard, Soule Steel Company, Pearl Harbor Navy Yard and Boston Navy Yard.
  • 604
  • 24 Oct 2022
Topic Review
Youth's Vision:Significance of China's Development to the World
As young people in Africa, we hope to make use of China's development experience and achievements, strive to develop Africa, catch up with the pace of world development, and promote China-Africa friendship.
  • 1.8K
  • 28 Jan 2022
Topic Review
Youth: A Provocative Scientific Field
Although youth is a highly debated topic in the scientific literature, this does not seem to happen for an extended period of time. While there is no unanimous definition of youth, it should be noted that it is rather an intermediate stage, but also socially constructed, between childhood and adulthood. This is because youth should not be confused with adolescence, which is defined as “… beginning with puberty and ending once physiological and emotional maturity is achieved, and it tends to cover a more protracted time span”.
  • 598
  • 23 May 2022
Topic Review
Youth Road Safety Behavior in Serbia
Road traffic crashes are a leading cause of death for young people. Aberrant driver behaviors, such as drink driving, speeding, not wearing seatbelts, non-compliance with traffic rules and aggressive driving, are key contributors to these crashes. Gender and urban/rural differences are also risk factors. Younger people have the highest road crash and fatality risk.
  • 817
  • 07 Nov 2022
Topic Review
Youth Entrepreneurship Platform Returning to Hometown in China
The construction of business incubator platforms to assist young people who return to their hometowns to launch their own enterprises is urgently needed because youth entrepreneurship is seen as a crucial component of rural revitalization. Based on this, the authors of this study distributed surveys to 468 returning youths in rural startup spaces to gather data, built a structural model, and conducted interviews with 13 entrepreneurial youths to examine the relationship between government policies, services, and the design of rural startup spaces, as well as the self-efficacy of returning entrepreneurial youths and the innovation performance of businesses. The results demonstrate how important government policies are in encouraging youth entrepreneurship in their local communities. It has the potential to enhance both the development of rural crowdsourcing spaces and the self-efficacy of young entrepreneurs, thereby enhancing the innovative capabilities of local entrepreneurial businesses. Therefore, in order to encourage economic development in rural areas, the government should improve pertinent support measures, enhance the development of business incubation platforms, and encourage young people moving back to their hometowns to start their own businesses.
  • 510
  • 14 Nov 2023
Topic Review
Youth Entrepreneurship
Youth unemployment is one of Africa’s biggest challenges, but compulsory entrepreneurship training can turn the continent’s job-seekers into job creators, writes Abiodun Egbetokun.  First published on https://sciafmag.com/2020/02/26/three-lessons-from-nigeria-on-how-to-boost-youth-entrepreneurship/
  • 721
  • 01 Nov 2020
Topic Review
Youth Empowerment for Sustainable Development
Youth, generally defined as young people aged between 15 and 24, are a key population. Their empowerment as members of our societies is vital for the societal ecosocial transition from a human-centered to an ecosocial focus, in pursuit of Sustainable Development (SD) and the United Nations “The 2030 Agenda for Sustainable Development” with its 17 Sustainable Development Goals (SDGs). In relation to sustainability, ecosocial transition is a holistic perspective with ecological, economic, and social dimensions of development focusing on the interlinkage between social and ecological sustainability.
  • 2.8K
  • 21 Apr 2022
Topic Review
Youth Associations and Entrepreneurship
The development of skills for entrepreneurship among young people has attracted interest at various levels, as a way of overcoming many problems that affect this group in the areas of economic development and job creation. It was possible to verify that youth associations assume a dual role, on the one hand contributing to the personal, social and professional development of its leaders, members and participants, and on the other hand, as a promoter of social transformation, particularly at the local level.
  • 757
  • 06 Apr 2022
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