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	<title>materials &#8211; USA NEWS LIVE</title>
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		<title>Judge blocks Musks Doge from sensitive finance ministry materials</title>
		<link>https://bloggingthree.soflytech.com/2025/02/judge-blocks-musks-doge-from-sensitive-finance-ministry-materials/</link>
					<comments>https://bloggingthree.soflytech.com/2025/02/judge-blocks-musks-doge-from-sensitive-finance-ministry-materials/#respond</comments>
		
		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Sun, 09 Feb 2025 12:47:23 +0000</pubDate>
				<category><![CDATA[Politics]]></category>
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					<description><![CDATA[National news A federal judge within the early Saturday was blocked Elon Musk Department for Government Efficiency From access to records of the financial department that incorporates sensitive personal data resembling social security and checking account numbers for tens of millions of Americans. The US district judge Paul A. Engelmayer has issued the injunction after [&#8230;]]]></description>
										<content:encoded><![CDATA[<p><img decoding="async" src="https://www.boston.com/wp-content/uploads/2025/02/AP25036450448580-67a74d1e7d7a2-850x638.jpg" /></p>
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<p>								National news<br />
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<p>A federal judge within the early Saturday was blocked <a href="https://apnews.com/article/elon-musk-vivek-ramaswamy-doge-ce55aa7ca8c921511d18e837c2a2db64">Elon Musk Department for Government Efficiency</a> From access to records of the financial department that incorporates sensitive personal data resembling social security and checking account numbers for tens of millions of Americans.</p>
<p>The US district judge Paul A. Engelmayer has issued the injunction after 19 democratic lawyers were sued General President <a href="https://apnews.com/hub/donald-trump">Donald Trump</a>. <a href="https://apnews.com/article/elon-musk-trump-doge-states-47912249bf4b79477cbe211565c9743c">The case</a>Submitted before the Federal Court in New York City, claims that the Team&#39;s Trump government has allowed the team to access the central payment system of the financial department in violation of the Federal Law.</p>
<p>The payment system takes over tax reimbursements, social security advantages, benefits of veterans and rather more and sends trillion dollars yearly, while an expansive network of the non-public and financial data of the Americans incorporates.</p>
<p>Engelmayer, who was appointed by President Barack Obama, also said that everybody who has had access to the sensitive information since January 20 must immediately destroy all copies of the fabric downloaded from Treasury Department Systems.</p>
<p>He set a hearing for February 14th.</p>
<p>The White House didn&#8217;t immediately reply to a request for a comment on the submitted lawsuit.</p>
<p>Musk&#39;s department for presidency efficiency, also often called Doge, <a href="https://apnews.com/article/doge-government-trump-executive-order-1a2fb7235b9d6f178c764cf6c78d3317">was created</a> To discover and eliminate what the Trump government viewed as wasteful government spending. Doges Access to financial records and the inspection of assorted government agencies has triggered concern concerning the increasing power of musk to critics, while the supporters have cheered on the thought of ​​restoring government funds in inflated.</p>
<p>Musk made fun of the criticism of Doge on his X -Social -Media platform and explains that they save taxpayers tens of millions of dollars.</p>
<p><a href="https://apnews.com/hub/letitia-james">New York Attorney General Letitia James</a>The office filed the lawsuit, said Doges access to the information of the Ministry of Finance, security problems and the potential of illegal freezing in federal funds.</p>
<p>“This non -selected group, led by the richest man on this planet, isn&#8217;t entitled to acquire this information, and you&#8217;ve got expressly requested this non -authorized access to illegally blocked payments on which tens of millions of Americans depend on, payments for health care, childcare And other essential programs, programs, programmed that tens of millions of Americans depend on and so they have expressly blocked on illegally. James said in a video message published by her office on Friday.</p>
<p>James, a Democrat who was one in every of Trump&#39;s chiefs by Trump, said that the president had no authority to present away the private information of Americans to someone he chooses, and he cannot shorten any federal payments approved by the congress.</p>
<p>Also within the lawsuit are Arizona, California, Colorado, Connecticut, Delaware, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, North Carolina, Oregon, Rhode Island, Vermont and Wisconsin.</p>
<p>In the lawsuit it&#8217;s claimed that DGEs could affect access to the financial records that would affect the funds already acquired by the congress, which might exceed the legal authority of the Ministry of Finance. The case can be argued that access to Doge violates the executive right of the federal government and the separation of powers of the US structure by the powers of the US structure.</p>
<p>In addition, the finance minister Scott Bessent accuses the longstanding policy of the department of the protection of sensitive personal information and financial information to be able to provide Musk&#39;s Doge team access to his payment systems.</p>
<p>&#8220;This decision did not take into account the legal obligations to protect such data and ignore the data protection expectations of the recipients of the Federal Fund,&#8221; including states, veterans, pensioners and taxpayers, the lawsuit says.</p>
<p><a href="https://apnews.com/hub/william-tong">Attorney General of Connecticut William Tong</a> It isn&#8217;t clear what Doge does with the knowledge within the financial systems.</p>
<p>&#8220;This is the greatest data injury in American history,&#8221; said Tong in a press release on Friday. “Doge is an illegally constituted band of renegade Tech -Bros, which combes sensitive data and demanding payment systems through confidential records. What could go improper? &#8220;</p>
<p>The finance department has announced that the review of the integrity of the system and that no changes are made. According to 2 people conversant in the method, Musk&#39;s team began his request <a href="https://apnews.com/article/treasury-doge-musk-read-only-access-489231c6db1a9f07fc68f9f08803f815">Looking for tactics</a> To suspend payments from the US agency for international development that Trump and Musk try to interrupt down. The two people spoke with the associated press on the condition of anonymity for fear of retaliation.</p>
<p>Democratic legislators are separated <a href="https://apnews.com/article/treasury-doge-musk-payment-investigation-cb71dda6af56007ab2c05beb5c0d3d3b">Search for an investigation by the financial department</a> from Doges access to the federal government&#39;s payment system.</p>
<p>In addition, unions and representative groups have sued to dam the check of the payment system concerning the concerns about their legality. A judge in Washington temporarily restricted access to 2 employees with &#8220;only&#8221; rules on Thursday.</p>
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		<title>From the usage of plant husks to high-tech materials, bicycle helmets have improved significantly over the past two centuries</title>
		<link>https://bloggingthree.soflytech.com/2024/11/from-the-usage-of-plant-husks-to-high-tech-materials-bicycle-helmets-have-improved-significantly-over-the-past-two-centuries/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Tue, 19 Nov 2024 08:44:37 +0000</pubDate>
				<category><![CDATA[Technology]]></category>
		<category><![CDATA[bicycle]]></category>
		<category><![CDATA[centuries]]></category>
		<category><![CDATA[helmets]]></category>
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		<guid isPermaLink="false">https://bloggingthree.soflytech.com/?p=19399</guid>

					<description><![CDATA[Imagine – it&#39;s the mid-Nineteenth century and also you&#39;re riding your high-wheeled penny-farthing down a dusty road. Sure, there could also be some bumps, but in case you lose your balance you&#39;ll find yourself on a comparatively soft dirt road. But over time, these streets are replaced by paving stones, cobblestones, bricks or wood slats. [&#8230;]]]></description>
										<content:encoded><![CDATA[<p></p>
<div itemprop="articleBody">
<p>Imagine – it&#39;s the mid-Nineteenth century and also you&#39;re riding your high-wheeled penny-farthing down a dusty road. Sure, there could also be some bumps, but in case you lose your balance you&#39;ll find yourself on a comparatively soft dirt road. But over time, these streets are replaced by paving stones, cobblestones, bricks or wood slats. All of those materials are much harder and yet still quite bumpy. </p>
<p>As paved roads develop into more widely utilized in the United States and Europe, cyclists also use them <a href="https://allthatsinteresting.com/bicycle-history/2">began to suffer</a> gruesome skull fractures and other serious head injuries from falls. </p>
<p>As head injuries became more common, people searched for head protection. But the primary bicycle helmets were very different from today&#39;s helmets.</p>
<p><a href="https://scholar.google.com/citations?user=Hf8dRC4AAAAJ&#038;hl=en">I&#8217;m a materials engineer</a> who teaches a course on materials science and engineering in sports at Georgia Tech. The course covers many topics, but particularly helmets, as they&#8217;re utilized in many various sports, including cycling, and the materials from which they&#8217;re made play a very important role in how they function. Over the a long time, people have used a wide selection of materials to guard their heads while cycling, and firms proceed to develop latest and revolutionary materials. </p>
<p>In the start there was the pith helmet.</p>
<h2>Pith helmets</h2>
<p>The first head protection concept introduced to the cycling world was a <a href="https://www.helmets.org/history.htm">Hat made from marrow</a>that is the spongy bark present in the trunk of sola plants, . Pith helmet craftsmen pressed the pith into sheets and laminated it over dome-shaped molds to create a helmet shape. Then they covered the hats with canvas to make them weatherproof.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:88.72679045092838%;--background-color:#a97b55"><img decoding="async" alt="A hat made of brown material with a flat brim." class="lazyload" src="https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=532&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=532&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=532&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=669&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=669&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/632350/original/file-20241115-15-fvc4jo.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=669&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Hats made out of marrow were utilized by the military and as head protection when cycling.</span><br />
              <span class="attribution"><a class="source" href="https://commons.wikimedia.org/wiki/File:Helmet,_pith_%28AM_2015.1.1-1%29.jpg#/media/File:Helmet,_pith_(AM_2015.1.1-4).jpg">Auckland Museum</a>, <a class="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA</a></span><br />
            </figcaption></figure>
<p>Pith helmets were a far cry from what we&#8217;d call a helmet today, but they endured until the early twentieth century, when cycling clubs emerged. Since pith helmets offered little to no ventilation, racers began using them <a href="https://www.gearist.com/the-evolution-of-bicycle-helmets/">Halo-shaped leather helmets</a>. These had higher airflow and were more comfortable, although they didn&#39;t protect the pinnacle significantly better.</p>
<figure class="align-right zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:136.28691983122363%;--background-color:#8a8677"><img decoding="async" alt="A bicycle helmet made of leather strips connected to form a dome on a mannequin&#39;s head." class="lazyload" src="https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=237&#038;fit=clip" srcset="https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=817&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=817&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=817&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=1027&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=1027&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/632132/original/file-20241114-15-r9c641.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=1027&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Bicycle helmets with leather stripes were manufactured within the Nineteen Thirties.</span><br />
              <span class="attribution"><a class="source" href="https://collections.museumsvictoria.com.au/items/269408">Museums Victoria</a>, <a class="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA</a></span><br />
            </figcaption></figure>
<h2>Leather halo helmets</h2>
<p>The original concept for the Halo helmet called for a straightforward strip of leather to wrap across the brow. But these halo helmets quickly evolved as riders placed additional stripes lengthwise from front to back. They wrapped the leather straps with wool.  </p>
<p>The helmet manufacturers then ensure higher head protection <a href="https://www.helmets.org/history.htm">began adding more layers of leather strips</a> to extend the thickness of the helmet. Finally, they added various materials resembling cotton, foam and other textiles to those leather layers for higher protection.</p>
<p>While these had higher air circulation than tropical hats, the leather “hairnet” helmets still offered little or no protection within the event of a fall on a paved surface. And like Mark, the leather helmets fell apart when exposed to sweat and rain. </p>
<p>Despite these disadvantages, leather stripe helmets dominated the market <a href="https://www.helmets.org/history.htm">for several a long time</a> as cycling evolved throughout the twentieth century. </p>
<p>Then, within the Nineteen Seventies, a nonprofit organization dedicated to testing motorcycle helmets got here calling <a href="https://www.smf.org/">the Snell Foundation</a> latest standards for bicycle helmets published. They set their standards so high that they only allowed lightweight motorcycle helmets, which most cyclists didn&#39;t need to wear.</p>
<h2>New materials and latest helmets</h2>
<p>Motorcycle equipment manufacturer Bell Motorsports responded to the brand new standards <a href="https://www.helmets.org/history.htm">Release of the Bell Biker in 1975</a>. Expanded polystyrene or EPS was used for this helmet. EPS is identical foam used to make Styrofoam coolers. It is light and absorbs energy well.  </p>
<p>Involved in the development of the Bell Biker <a href="https://www.gearist.com/the-evolution-of-bicycle-helmets/">Spraying EPS right into a dome shape</a>. Manufacturers used small pellets of a really hard plastic &#8211; polycarbonate or PC &#8211; to form an outer shell after which attach it to the skin of the EPS. </p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:89.38992042440319%;--background-color:#554431"><img decoding="async" alt="Mottled white foam" class="lazyload" src="https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=536&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=536&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=536&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=674&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=674&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/632140/original/file-20241114-18-ssxmxn.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=674&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Expanded polystyrene, or EPS, is a foam utilized in Styrofoam coolers in addition to the core of bicycle helmets.</span><br />
              <span class="attribution"><a class="source" href="https://commons.wikimedia.org/wiki/File:Insulation_3.jpg">Aunt Amount/Wikimedia Commons</a>, <a class="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA</a></span><br />
            </figcaption></figure>
<p>Unlike the tropical and leather helmets, this design was lightweight, load-bearing, shock-absorbing and well-ventilated. The PC shell provided a smooth surface in order that within the event of a fall, the helmet would slide across the pavement relatively than being torn around and caught, which could lead to abrupt head rotation and concussions and other head and neck injuries.</p>
<p>Over the subsequent twenty years, as cycling became more popular, helmet manufacturers tried to search out the proper balance between lightweight and ventilated helmets while providing impact protection. </p>
<p>To reduce weight, an organization called Giro Sport Design <a href="https://www.gearist.com/the-evolution-of-bicycle-helmets/">has developed a pure EPS helmet</a> covered by a skinny Lycra fabric cover as a substitute of a tough PC shell. This design reduced the burden of the PC case and improved ventilation.</p>
<p>In 1989, an organization called Pro Tec introduced a helmet that had a nylon mesh built into the EPS foam core. The nylon mesh significantly increased the structural support of the helmet without the added weight of the PC shell.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:65.51724137931035%;--background-color:#a18558"><img decoding="async" alt="A man stands next to a bicycle and wears a green helmet made of thin material with a long tail." class="lazyload" src="https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=393&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=393&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=393&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=494&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=494&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/632133/original/file-20241114-17-tb1uzl.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=494&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Many racing cyclists found teardrop-shaped helmets to be more aerodynamic.</span><br />
              <span class="attribution"><a class="source" href="https://www.gettyimages.com/detail/news-photo/german-cyclist-erik-zabel-racing-with-team-telekom-wearing-news-photo/2158605791?adppopup=true">Bongarts/Getty Images</a>, <a class="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">CC BY-NC-ND</a></span><br />
            </figcaption></figure>
<p>Meanwhile, as cycling became more competitive, many riders and manufacturers began doing it <a href="https://www.gearist.com/the-evolution-of-bicycle-helmets/">Development of more aerodynamic helmets</a> Use of existing materials. A revolutionary teardrop-style helmet was introduced on the 1984 Olympics.</p>
<p>Casual cycling enthusiasts now also wear teardrop helmets.</p>
<h2>Helmets available on the market today</h2>
<p>Helmet manufacturers proceed to innovate. Today, many business brands use a tough polyethylene terephthalate or PET shell across the EPS foam as a substitute of a PC shell to extend the protection and sturdiness of the helmet while reducing costs.</p>
<p>Meanwhile, some brands still use PC cases. Instead of gluing them to the EPS foam, the <a href="https://www.helmets.org/history.htm">The shell itself serves as a mold</a>where the EPS expands to suit inside. This eliminates several process steps within the production of helmets, in addition to any gaps between the froth and the shell. This process makes the helmet each stronger and inexpensive to provide. </p>
<p>As helmets proceed to evolve to supply more protection at even lower weight, materials called copolymers like acrylonitrile butadiene styrene are replacing PC and PET shell materials.  </p>
<p>There are also materials which are easier and cheaper to provide, resembling: B. expanded polyurethane and expanded polypropylene <a href="https://schifferbooks.com/products/modern-sports-helmets">begins to interchange</a> the ever-present EPS core.</p>
<p>Just as leather and pith helmets would look strange to a cyclist today, bicycle helmets in a century may very well be made out of completely latest and revolutionary materials.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>To at some point make nuclear fusion a reliable source of energy, scientists must first develop materials which might be proof against heat and radiation</title>
		<link>https://bloggingthree.soflytech.com/2024/10/to-at-some-point-make-nuclear-fusion-a-reliable-source-of-energy-scientists-must-first-develop-materials-which-might-be-proof-against-heat-and-radiation/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Sat, 19 Oct 2024 15:31:22 +0000</pubDate>
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					<description><![CDATA[Fusion energy has the potential to be an efficient clean energy source due to its reactions incredibly large amounts of energy. Fusion reactors aim to breed what happens on Earth within the core of the sunwhere very light elements fuse and release energy. Engineers can use this energy to heat water and generate electricity via [&#8230;]]]></description>
										<content:encoded><![CDATA[<p></p>
<div itemprop="articleBody">
<p>Fusion energy has the potential to be an efficient clean energy source due to its reactions <a href="https://www.nature.com/immersive/d41586-021-03401-w/index.html">incredibly large amounts of energy</a>. Fusion reactors aim to breed what happens on Earth <a href="https://www.amnh.org/exhibitions/einstein/educator-resources/how-the-sun-works">within the core of the sun</a>where very light elements fuse and release energy. Engineers can use this energy to heat water and generate electricity via a steam turbine, however the path to fusion isn&#8217;t entirely straightforward.</p>
<p>Controlled nuclear fusion has <a href="https://www.iter.org/sci/Fusion">several benefits</a> in comparison with other energy sources for generating electricity. On the one hand, no carbon dioxide is produced throughout the fusion response itself. There is not any risk of a core meltdown and the response doesn&#8217;t produce long-lived radioactive waste.</p>
<p>I&#8217;m a <a href="https://scholar.google.com/citations?hl=en&#038;tzom=240&#038;user=_R7s4TcAAAAJ">Nuclear engineer</a> who studies materials that scientists could use in fusion reactors. Fusion occurs at incredibly high temperatures. To at some point make nuclear fusion a viable energy source, reactors should be built from materials that may withstand the warmth and radiation produced by fusion reactions.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:66.71087533156499%;--background-color:hsl(240, 2%, 30%);"><img decoding="async" alt="A large metal chamber with a cylindrical structure in the middle." class="lazyload" src="https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=400&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=400&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=400&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=503&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=503&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/625015/original/file-20241010-17-7xzgby.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=503&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">3D rendering of the inside of a fusion reactor chamber.</span><br />
              <span class="attribution"><a class="source" href="https://www.gettyimages.com/detail/photo/interior-of-the-vacuum-vessel-of-tokamak-royalty-free-image/1813248712?phrase=tokamak+fusion+reactor&#038;searchscope=image%2Cfilm&#038;adppopup=true">xia yuan/Moment via Getty Images</a></span><br />
            </figcaption></figure>
<h2>Challenges with fusion materials</h2>
<p>A fusion response can fuse multiple forms of elements. The one preferred by most scientists is <a href="https://www.iter.org/sci/whatisfusion">Deuterium plus tritium</a>. These two elements are most probably to fuse at temperatures that a reactor can maintain. This response produces a helium atom and a neutron, which transport many of the energy of the response. </p>
<figure class="align-left ">
<div class="placeholder-container" style="--aspect-ratio-percent:97.46835443037975%;--background-color:#5f5dad"><img decoding="async" alt="A diagram showing the reaction between deuterium and tritium, in which a deuterium atom and a tritium atom combine to form a helium atom and a neutron." class="lazyload" src="https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=237&#038;fit=clip" srcset="https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=584&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=584&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=584&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=734&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=734&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/619972/original/file-20240917-16-6fwzvi.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=734&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">In the DT fusion response, two isotopes of hydrogen, deuterium and tritium, fuse, producing a helium atom and a high-energy neutron.</span><br />
              <span class="attribution"><span class="source">Sophie Blondel/UT Knoxville</span></span><br />
            </figcaption></figure>
<p>Humans have successfully created fusion reactions on Earth <a href="https://en.wikipedia.org/wiki/Ivy_Mike">since 1952</a> – some even in theirs <a href="https://www.cnn.com/2012/06/05/tech/the-18-year-old-who-built-a-nuclear-reactor/index.html">garage</a>. But the trick now&#8217;s to make it price it. You must get more energy out of the method than you spend money on triggering the response. </p>
<p><a href="https://usfusionenergy.org/science-fusion">Fusion reactions</a> occur in a single <a href="https://www.psfc.mit.edu/vision/what_is_plasma">highly regarded plasma</a>This is a gas-like state of matter, but consists of charged particles. The plasma must remain extremely hot – over 100 million degrees Celsius – and condensed all through the response.  </p>
<p>To keep the plasma hot and condensed and create a response that may proceed, special materials are required for the reactor partitions. You also need an inexpensive and reliable source of fuel.</p>
<p>While deuterium may be very common and is obtained from water, tritium may be very rare. A 1 gigawatt fusion reactor is designed to burn 56 kilograms of tritium annually. But the world only has about <a href="https://www.science.org/content/article/fusion-power-may-run-fuel-even-gets-started">25 kilograms of tritium</a> commercially available. </p>
<p>Researchers must find alternative sources of tritium before fusion energy can get off the bottom. One possibility is that every reactor produces its own tritium via a system called “tritium.” <a href="https://www.osti.gov/servlets/purl/1305833">Breeding cover</a>. </p>
<p>The brood cover forms the primary layer <a href="https://www.iter.org/mach/blanket">Plasma chamber</a> Walls and comprises lithium, which reacts with the neutrons produced throughout the fusion response to form tritium. The blanket also converts the energy carried by these neutrons into heat. </p>
<figure>
<p><iframe title="How the Heart of ITER will Electrify Plasma" width="1170" height="658" src="https://www.youtube.com/embed/5tH4obUsY64?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p><figcaption><span class="caption">The fusion response chamber at ITER will electrify the plasma.</span></figcaption></figure>
<p>Fusion devices <a href="https://www.iter.org/mach/divertor">also need a diverter</a>which removes the warmth and ash generated throughout the response. The divertor helps maintain reactions for longer.</p>
<p>These materials can be exposed to unprecedented levels of warmth and particle bombardment. And there are currently no experimental facilities to breed these conditions and test materials in a real-world scenario. The focus of my research is due to this fact on closing this gap using models and computer simulations.</p>
<h2>From the atom to the whole device</h2>
<p>My colleagues and I are working on developing tools that may predict how the materials in a fusion reactor erode and the way their properties change when exposed to extreme heat and high levels of particle radiation. </p>
<p>Irradiation may cause defects to form and grow in these materials, affecting their ability to answer heat and stress. We hope that government agencies and personal firms can use these tools to design fusion power plants in the longer term. </p>
<p>Our approach, called <a href="https://doi.org/10.1016/j.jnucmat.2021.153113">Multiscale modeling</a>is to review the physics of those materials over different time and length scales using a spread of computational models. </p>
<p>We first investigate the phenomena occurring in these materials on the atomic level through precise but expensive simulations. For example, a simulation could examine how hydrogen moves in a cloth during irradiation. </p>
<p>From these simulations we consider <a href="https://www.sciencedirect.com/topics/physics-and-astronomy/diffusivity">Properties comparable to diffusivity</a>which tells us how far the hydrogen can spread through the fabric. </p>
<p>We can integrate the knowledge from these atomic-level simulations into more cost effective simulations that examine how the materials react on a bigger scale. These large-scale simulations are more cost effective because they model the materials as a continuum relatively than considering each individual atom.</p>
<p>The atomic-scale simulations could take weeks to finish <a href="https://www.nersc.gov/systems/perlmutter/">Supercomputer</a>while the continuum will only last a couple of hours.</p>
<figure class="align-center ">
<div class="placeholder-container" style="--aspect-ratio-percent:96.55172413793103%;--background-color:#af9864"><img decoding="async" alt="A chart showing simulations, with size on the x-axis and time on the y-axis. At the bottom left are atomic simulations, then continuum, then experiments." class="lazyload" src="https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=580&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=580&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=580&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=728&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=728&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/622959/original/file-20241002-16-u9qe4o.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=728&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">In the multiscale modeling approach, researchers use simulations on the atomic level, then apply the parameters they find to larger-scale simulations, after which compare their results with experimental results. When the outcomes disagree, they return to the atomic scale to analyze missing mechanisms.</span><br />
              <span class="attribution"><span class="source">Sophie Blondel/UT Knoxville, adapted from https://doi.org/10.1557/mrs.2011.37</span></span><br />
            </figcaption></figure>
<p>All of this computer modeling work is then compared with experimental results from laboratories.</p>
<p>For example, if one side of the fabric comprises hydrogen gas, we would like to know <a href="https://doi.org/10.1585/pfr.15.2405016">how much hydrogen escapes to the opposite side of the fabric</a>. If the model and experimental results agree, we will have faith within the model and use it to predict the behavior of the identical material under the conditions we&#8217;d expect in a fusion facility. </p>
<p>If they don&#39;t agree, we return to the atomic-level simulations to look at what we missed. </p>
<p>Furthermore, we will <a href="https://doi.org/10.1088/1741-4326/ac2875">Couple the larger scale material model with plasma models</a>. These models can tell us which parts of a fusion reactor are hottest or subject to essentially the most particle bombardment. From there we will evaluate further scenarios. </p>
<p>For example, if an excessive amount of hydrogen leaks through the fabric during operation of the fusion reactor, we would recommend making the fabric thicker in certain places or adding something to trap the hydrogen. </p>
<h2>Designing recent materials</h2>
<p>As the seek for industrial fusion energy continues, scientists must develop more resilient materials. The field of possibilities is vast – engineers could make multiple elements together in some ways. </p>
<p>You could mix two elements to create a brand new material, but how do you understand what the right ratio of every element is? And what if you should try mixing? <a href="https://discover.lanl.gov/news/0613-fusion-energy/">five or more elements together</a>? It would take far too long to run our simulations for all of those possibilities. </p>
<p>Luckily, artificial intelligence is here to assist. By combining experimental and simulation results <a href="https://doi.org/10.1038/s41598-021-96507-0">analytical AI</a> can recommend mixtures which might be most probably to have the characteristics we&#8217;re on the lookout for, comparable to: B. Heat and stress resistance.</p>
<p>The goal is to scale back the variety of materials an engineer would have to supply and experimentally test, saving money and time.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>Squids have tiny teeth of their suction cups – scientists could use their unique properties to create self-healing materials</title>
		<link>https://bloggingthree.soflytech.com/2024/08/squids-have-tiny-teeth-of-their-suction-cups-scientists-could-use-their-unique-properties-to-create-self-healing-materials/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Thu, 22 Aug 2024 06:58:32 +0000</pubDate>
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					<description><![CDATA[When you&#8217;re thinking that of a fearsome predator with sharp teeth, an octopus might be not the primary animal that involves mind. But these complex creatures have excellent eyesight, a robust beak for breaking mussels and mobile tentacles that help them grab their prey. Oh, they usually have teeth of their suction cups. serrated teeth [&#8230;]]]></description>
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<div itemprop="articleBody">
<p>When you&#8217;re thinking that of a fearsome predator with sharp teeth, an octopus might be not the primary animal that involves mind. But these complex creatures <a href="https://www.sciencefriday.com/videos/a-squids-eye-view/">have excellent eyesight</a>, <a href="https://www.nationalgeographic.com/science/article/a-squids-beak-is-a-marvel-of-biological-engineering">a robust beak for breaking mussels</a> and mobile tentacles that help them grab their prey. </p>
<p>Oh, they usually have teeth of their suction cups. <a href="https://www.tepapa.govt.nz/discover-collections/read-watch-play/colossal-squid/anatomy-colossal-squid/arms-and-tentacles">serrated teeth within the suction cups of their tentacles</a> enable them to cling to their prey.</p>
<p>While most hard tissues in animals are mineralized, and calcium strengthens their bones, shells, or teeth, the squid&#39;s sucker teeth are made from structural proteins as a substitute. Scientists don&#39;t really understand how these teeth are made.</p>
<p>By looking inside a squid sucker with an electron microscope, <a href="https://www.apenafrancesch.com/team">our team of scientists</a> captured a picture showing the cellular tissue from which teeth grow. The cells within the inner partitions of the sucker secrete proteins that bind together to form complex tooth ring structures.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:74.6684350132626%;--background-color:#504a33"><img decoding="async" alt="Two white rings with teeth protruding from them." class="lazyload" src="https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=448&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=448&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=448&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=563&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=563&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/594416/original/file-20240515-16-4ha9q7.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=563&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">The tooth structures contained in the suckers of squid.</span><br />
              <span class="attribution"><span class="source">Abdon Pena-Francesch</span></span><br />
            </figcaption></figure>
<h2>Highly effective proteins within the suckers of squid</h2>
<p>Squid&#39;s sucker teeth have some extraordinary properties. They are immune to pressure, yet flexible and in a position to conform to the form of their prey. Our team&#39;s research seeks to grasp not only how these teeth are made, but additionally where their unique properties come from. </p>
<p>The teeth consist of a family of <a href="https://doi.org/10.3389/fchem.2019.00069">Structural proteins</a>which have a mechanical slightly than a biological function. Examples include keratin, which makes up hair and nails, or silk, which supplies structure to spider webs and silkworm cocoons. In squid, these suckers catch and cling to prey.</p>
<p>Proteins are made up of amino acids arranged in a selected order, and this order determines their structure. The proteins of the suckers contain amino acids that form hard, tiny crystals in the fabric, called nanocrystals. These nanocrystals connect the protein strands in a network &#8211; much like knots in a fishing net. </p>
<p>These nanocrystals mix to form nanotubes contained in the material, which seem like tiny honeycomb structures. When we take a look at them through an electron microscope, we are able to see a tooth cut in half, revealing the complex internal structure with long but tiny nanotubes. Thanks to those nanostructures, the teeth comprised of squid protein are so strong, tough and versatile that they outperform many manmade polymers and modern materials.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:83.15649867374006%;--background-color:#434343"><img decoding="async" alt="Long, thin tube structures assembled." class="lazyload" src="https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=499&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=499&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=499&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=627&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=627&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/594417/original/file-20240515-16-kwxons.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=627&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">An electron micrograph of a cross-section of the teeth of a squid sucker ring, showing the nanotubes.</span><br />
              <span class="attribution"><span class="source">Abdon Pena-Francesch</span></span><br />
            </figcaption></figure>
<h2>New materials inspired by octopuses</h2>
<p>Scientists and engineers can take inspiration from biology and use unique natural structures to model and develop latest materials. For example, the teeth of squid suckers have inspired the event of <a href="https://doi.org/10.1038/s41563-020-0736-2">self-healing materials</a> who can repair their cuts, holes or scratches themselves.</p>
<p>The nanocrystals that hold the proteins of squid teeth together can reform after they break. Materials created in our lab inspired by squid nanocrystals may lead to: <a href="https://doi.org/10.1002/adfm.202215248">self-repairing medical devices or robots</a>These materials would last more and require less maintenance, which can be useful in hazardous environments or within the human body.</p>
<p>These octopus-inspired materials could also assemble and disassemble themselves. Materials with this property could <a href="https://www.frontiersin.org/news/2019/02/22/squid-ring-teeth-proteins-green-plastic-alternative/">recycled or dismantled</a> without leaving any waste behind. This material would subsequently be a promising bio-based alternative to single-use plastic.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>Trump and his allies once cheered hacked materials. Now that they are saying he&#039;s a goal, that&#039;s over &#8211; The Mercury News</title>
		<link>https://bloggingthree.soflytech.com/2024/08/trump-and-his-allies-once-cheered-hacked-materials-now-that-they-are-saying-hes-a-goal-thats-over-the-mercury-news/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Tue, 13 Aug 2024 03:57:26 +0000</pubDate>
				<category><![CDATA[Technology]]></category>
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					<description><![CDATA[By NICHOLAS RICCARDI, Associated Press Donald Trump was once a proponent of releasing hacked materials. &#8220;Russia, if you&#39;re listening,&#8221; Trump said during a press conference during his 2016 presidential campaign, when Hillary Clinton&#39;s deleted personal emails were a hot topic, &#8220;I hope you can find the 30,000 missing emails.&#8221; “I think you will probably be [&#8230;]]]></description>
										<content:encoded><![CDATA[<p><img decoding="async" src="https://www.mercurynews.com/wp-content/uploads/2024/08/Election_2024_Trump_14847.jpg?w=1400px&amp;strip=all" /></p>
<div>
<p><strong>By NICHOLAS RICCARDI, Associated Press</strong></p>
<p><a href="https://apnews.com/hub/donald-trump">Donald Trump</a> was once a proponent of releasing hacked materials. &#8220;Russia, if you&#39;re listening,&#8221; Trump said during a press conference during his 2016 presidential campaign, when Hillary Clinton&#39;s deleted personal emails were a hot topic, &#8220;I hope you can find the 30,000 missing emails.&#8221;</p>
<p>“I think you will probably be richly rewarded by our press,” he said on the time.</p>
<p>That modified when Trump’s latest presidential campaign announced this weekend that it <a href="https://apnews.com/article/donald-trump-campaign-hacked-036ffd3ed07cf3fe9fb74d4958808b65">was hacked by Iran</a>&#8220;Any media outlet or news organization that reprints documents or internal communications is acting on behalf of America&#39;s enemies and doing exactly what they want,&#8221; Steven Cheung, the campaign&#39;s communications director, said Saturday in a press release announcing the hacking of the campaign.</p>
<p>The campaign has not responded to questions on why its stance on the hacking has modified, including a request from The Associated Press on Monday. But its latest stance is a notable difference from 2016, when Trump enthusiastically welcomed the Russian hacking of his opponent Clinton&#39;s advisers and the Democratic National Committee.</p>
<p>The current hack remains to be unclear.</p>
<p>On Friday, Microsoft released a <a href="https://cdn-dynmedia-1.microsoft.com/is/content/microsoftcorp/microsoft/final/en-us/microsoft-brand/documents/5bc57431-a7a9-49ad-944d-b93b7d35d0fc.pdf">report</a> The report said Iranian hackers attempted to interrupt into the account of an official from one in all the presidential campaigns, but no further details were provided. On Saturday, the Trump campaign announced it had been hacked, but again didn&#8217;t name the person whose account had been hacked. This got here after Politico said it had been contacted by an unknown source who allegedly leaked internal campaign documents.</p>
<p>Iran has denied involvement in a hack. The US government has not confirmed that a hacking attack occurred. On Monday, the FBI said in a press release that it was investigating the case.</p>
<p>In 2016, intelligence officials said Russian hackers had stolen hundreds of emails from the Democratic National Committee, the Democratic Congressional Campaign Committee and the non-public account of Clinton campaign chairman John Podesta. The first batches were released in the summertime when Clinton won the Democratic nomination.</p>
<p>At the time, Trump asked Russia to see his rival&#39;s private emails. He later claimed it was a joke.</p>
<p>The hacked material was released through third parties, including the web site Wikileaks, which began releasing day by day releases of Democratic documents in October, shortly after a video surfaced during which Trump boasted about sexually harassing women.</p>
<p>Trump usually drew attention to the Democrats&#39; Wikileaks leaks at his campaign rallies. At one in all these events, for instance, he declared: &#8220;I love Wikileaks.&#8221;</p>
<p>The leaked documents received a number of media attention. Kathleen Hall Jamieson, a professor of communications on the University of Pennsylvania and writer of the book &#8220;Cyberwar&#8221; in regards to the 2016 hacker attacks, believes that the reporting helped Trump win the election.</p>
<p>&#8220;2016 was not a year that journalists should be proud of,&#8221; Jamieson said in an interview on Monday, adding that the most important query is how news organizations apply their standards to material that&#8217;s in the general public domain.</p>
<p>&#8220;It&#39;s no surprise that Trump says what suits him for the election,&#8221; Jamieson said. &#8220;He&#39;s not a person for whom inconsistency is a problem.&#8221;</p>
<p>Nick Merrill was a spokesman for Clinton&#39;s 2016 campaign and opposed the discharge of the hacked documents on the time. On Monday, he noted that the Trump campaign team is playing the same role this time.</p>
<p>&#8220;In addition to the characteristic hypocrisy, they just spent three weeks explaining that they are not weird,&#8221; Merrill said via text message. &#8220;And I would imagine that releasing their internal correspondence will help dispel that impression.&#8221;</p>
<p>Asked if that meant he now believed hacked material ought to be made public, Merrill replied: &#8220;A precedent has been set here. I&#39;m not passing judgment on that.&#8221;</p>
<p>Originally published: <time datetime="2024-08-12 14:15:12">August 12, 2024 at 2:15 p.m.</time></p>
</div>
<p><em>image credit : www.mercurynews.com</em></p>
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		<title>What are roads made from?  A paving materials engineer explains the science behind the asphalt you drive on</title>
		<link>https://bloggingthree.soflytech.com/2024/05/what-are-roads-made-from-a-paving-materials-engineer-explains-the-science-behind-the-asphalt-you-drive-on/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Sat, 11 May 2024 11:41:35 +0000</pubDate>
				<category><![CDATA[News]]></category>
		<category><![CDATA[asphalt]]></category>
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					<description><![CDATA[While you&#39;re driving, you&#39;re probably considering more about your destination than concerning the road surface you&#39;re driving over. However, constructing roads requires quite a lot of engineering feats, from developing the proper pavement materials to using heavy equipment to put them. The higher they&#8217;re built, the longer the roads last and the less construction delays [&#8230;]]]></description>
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<div itemprop="articleBody">
<p>While you&#39;re driving, you&#39;re probably considering more about your destination than concerning the road surface you&#39;re driving over.  However, constructing roads requires quite a lot of engineering feats, from developing the proper pavement materials to using heavy equipment to put them.  The higher they&#8217;re built, the longer the roads last and the less construction delays drivers should endure. </p>
<p><a href="https://scholar.google.com/citations?user=YpJ-MQwAAAAJ&#038;hl=en">I&#8217;m an engineer who conducts materials research</a> used on the street area.  Scientists in my field are working to develop materials that could make roads stronger and longer lasting. </p>
<h2>Road materials</h2>
<p>What are roads really made from?  The easy answer is that they&#8217;re made from typical material <a href="https://medium.com/@mackinleyclarkpavingbc/what-are-the-different-types-of-aggregates-used-in-road-construction-17906f72fd26">Building materials comparable to aggregates</a> – soils and rocks – as well <a href="https://trb.org/publications/millennium/00006.pdf">Asphalt binder</a> And <a href="https://www.sciencedirect.com/topics/engineering/portland-cement">Portland cement</a>which act like glue and stick every thing together.</p>
<p>Asphalt binder is <a href="https://pavementinteractive.org/reference-desk/materials/asphalt/asphalt-production-and-oil-refining/">refined from crude oil</a>.  Refineries first extract gasoline, kerosene and oil from crude oil, and what&#8217;s left on the bottom becomes asphalt.  Portland cement is produced from various ingredients including limestone, sand, clay, silica and aluminum oxide. </p>
<p>Engineers compact the asphalt binder and aggregate mixture at an elevated temperature of about 150 degrees Celsius, which glues the aggregates together to form the ultimate product <a href="https://www.sciencedirect.com/topics/engineering/asphalt-concrete">Asphalt, concrete</a>.</p>
<p>If they use Portland cement as a substitute of asphalt binder to connect the aggregates together, engineers say <a href="https://www.concrete.org/topicsinconcrete/topicdetail/Curing%20of%20Concrete?search=Curing%20of%20Concrete">Cure the cement and aggregate mixture</a> with water <a href="https://maturix.com/knowledge-center/what-is-cement-hydration/#">a process called hydration</a>. </p>
<p>Hydration binds the cement to the aggregates to provide what&#8217;s referred to as the product <a href="https://www.sciencedirect.com/topics/engineering/portland-cement-concrete">Portland cement concrete</a>, stronger.  This process doesn&#8217;t require external heating.</p>
<h2>Pavement structure</h2>
<p>Asphalt concrete <a href="https://pavementinteractive.org/reference-desk/design/structural-design/pavement-structure/">Pavement structure</a> typically consists of three essential layers: the bottom layer, the intermediate layer and the surface layer. </p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:82.36074270557029%;--background-color:#986052"><img decoding="async" alt="A diagram showing five different layers of pavement, including the surface, intermediate and base layers of concrete as well as the subgrade and subgrade." class="lazyload" src="https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=494&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=494&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=494&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=621&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=621&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/592723/original/file-20240507-16-12l897.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=621&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">The layers that make up the road surface.</span><br />
              <span class="attribution"><span class="source">Mansour Solaimanian</span></span><br />
            </figcaption></figure>
<p>Engineers call the present soil on which the sidewalk runs <a href="https://pavementinteractive.org/reference-desk/design/design-parameters/subgrade/">underground</a>.  A brand new layer of unbound earth and stones is placed on the subsoil, whereby the aggregates usually are not glued together.  This is known as a subbase or unbound aggregate base.</p>
<p>The base course can consist of either stones packed together without binder or a mix of stone and asphalt binder. </p>
<p>Once the road builders have created the bottom, it&#8217;s time to construct the asphalt concrete layers: the bottom layer, the intermediate layer and the surface layer.  All of those layers contain the aggregates—the pieces of rock and sand—which are bonded in some strategy to the asphalt binder. </p>
<p>Engineers determine what number of layers to construct and the way thick each layer must be by determining how much traffic will travel over the road.  The more traffic, the thicker the surface must be.  For example, on interstate highways <a href="https://rosap.ntl.bts.gov/view/dot/18044">Depth of layers</a> together could possibly be 20 inches (51 centimeters) or more.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:75.3315649867374%;--background-color:#8d886d"><img decoding="async" alt="A machine drives over dark pavement." class="lazyload" src="https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=452&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=452&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=452&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=568&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=568&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/590265/original/file-20240424-20-3gbbbw.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=568&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">The asphalt concrete base layer is placed and compacted using a paver.</span><br />
              <span class="attribution"><span class="source">Mansour Solaimanian</span></span><br />
            </figcaption></figure>
<h2>Build a powerful road</h2>
<p>The road builders bring the fabric onto the road with one <a href="https://en.wikipedia.org/wiki/Paver_(vehicle)">Asphalt paving machine</a> known as a finisher.  An operator operates the paver, which takes the fabric from a truck and puts it on the road.  Thereafter, <a href="https://en.wikipedia.org/wiki/Road_roller">Heavy duty wheels</a> Compact it, make it stable and prepare it for vehicles.</p>
<p>To ensure a stable and long-lasting road, engineers first select one of the best surface or location on which to construct the surface.  If the subsoil is just too weak, the road can crack and fail &#8211; even when one of the best materials are used for the surface.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:74.93368700265252%;--background-color:#9c8d61"><img decoding="async" alt="A sandy, granular material packed onto the ground where a road will run." class="lazyload" src="https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=449&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=449&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=449&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=565&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=565&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/590264/original/file-20240424-18-u8uxvc.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=565&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Engineers compact the subsoil before installation.</span><br />
              <span class="attribution"><span class="source">Mansour Solaimanian</span></span><br />
            </figcaption></figure>
<p>First, the road builders compact the subsoil with rollers.  Once they&#8217;ve compacted the subsoil, they place the aggregates directly on the subsoil and compact them.  This aggregate carrier on the subsoil forms a stable foundation for the asphalt layers.</p>
<p>If the road builders don&#39;t use the proper materials, or don&#39;t put them together appropriately, or don&#39;t design the pavement structure for the expected traffic, the road can suffer this <a href="http://asphaltmagazine.com/understanding-pavement-distress/">Cracks, ruts and failure</a>. </p>
<p>Cracks occur either at extremely low temperatures or when heavy trucks and buses are repeatedly driven over on the road.  Ruts, i.e. clear impressions within the road surface, occur under heavy trucks or at road intersections, especially in summer heat. </p>
<p>Potholes are a serious road problem that you just&#39;ve probably seen before.  They often occur within the spring after water trapped within the pavement freezes over the winter after which melts within the spring.  This melting process weakens the road and makes it more fragile.  When vehicles drive over them, potholes can form.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:75.72944297082228%;--background-color:#45403d"><img decoding="async" alt="A road with a network of cracks." class="lazyload" src="https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=454&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=454&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=454&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=571&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=571&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/590266/original/file-20240424-16-g10ege.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=571&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">The road may crack over time and with repeated use.</span><br />
              <span class="attribution"><span class="source">Mansour Solaimanian</span></span><br />
            </figcaption></figure>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:74.40318302387267%;--background-color:#2c4b34"><img decoding="async" alt="A car drives over a deep depression in the road." class="lazyload" src="https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=447&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=447&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=447&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=561&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=561&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/590267/original/file-20240424-20-jveao8.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=561&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Ruts, just like the notch at this intersection, occur when the road is exposed to stationary vehicles.</span><br />
              <span class="attribution"><span class="source">Mansour Solaimanian</span></span><br />
            </figcaption></figure>
<p>Before the road is built, the materials are tested within the laboratory to make sure they&#8217;ll withstand the stresses of traffic and the environment. </p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:74.6684350132626%;--background-color:#a38951"><img decoding="async" alt="A piece of equipment with 4 pieces of plaster inside." class="lazyload" src="https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=448&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=448&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=448&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=563&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=563&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/590268/original/file-20240424-18-vk3zso.png?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=563&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Laboratory testing of the road materials includes tracking the wheels underwater to make sure the materials delay.</span><br />
              <span class="attribution"><span class="source">Mansour Solaimanian</span></span><br />
            </figcaption></figure>
<p>Engineers within the lab subject the pavement materials to each freezing and extremely popular temperatures to make sure they&#8217;ll withstand every kind of weather.  They also expose the paving materials to water to make sure that the materials don&#8217;t disintegrate during rain or flooding. </p>
<p>At the <a href="https://www.superpave.psu.edu/About-Us/Index.aspx">Penn State University Highway Laboratory</a>My team tests asphalt mixtures to which we now have added so-called modifiers.  These include special polymers and fibers that would make the road stronger.  </p>
<p>Next time you&#39;re out and about, do not forget that it takes loads of engineering and tremendous teamwork <a href="https://rosap.ntl.bts.gov/view/dot/38480">smooth road surface</a> You drive on.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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