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ProgrammableWeb

Facebook Begins Rollout of Data Use Checkup to Facebook Platform Developers

In an effort to further protect user privacy, and given past failures in this area, Facebook has recently simplified the company’s platform terms and developer policies in hopes that this will improve adherence to guidelines. To support these goals Facebook has announced the rollout of Data Use Checkup, an annual process for developers that validates data usage.

This new process, which is supported by a self-service tool, was first announced in April of 2020 and will require developers to use check each application they manage for adherence to company standards. Developers will have 60 days to comply with this standard before losing access to APIs.

The rollout of this program will be gradual and developers will begin to be notified over the next several months. The announcement of the rollout notes that developers will be notified “via a developer alert, an email to the registered contact, and in your Task List within the App Dashboard.” To simplify the process for developers that manage multiple apps, Facebook is allowing batch processing via an interface that facilitates this action, although developers will still be required to check each apps permissions.

Developers can check the App Dashboard to verify if they are able to enroll in the program at this time. 

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Author: <a href="https://www.programmableweb.com/user/%5Buid%5D">KevinSundstrom</a>

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3D Printing Industry

Interview: Ascend Manufacturing CEO Justin Nussbaum details Large Area Projection Sintering 

3D printer manufacturer Ascend Manufacturing has revealed the inner workings of its novel Large Area Projection Sintering (LAPS) 3D printing method. In an interview with Founder and CEO of the company Justin Nussbaum, 3D Printing Industry found out more about the closed-loop additive manufacturing technology behind the new method. The powder bed fusion (PBF) technique […]

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Author: Paul Hanaphy

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ScienceDaily

Lossless conduction at the edges

Topological insulators represent a key area of research because they could potentially be used as superconductors in the electronics of the future. Materials of this kind behave like insulators on the inside, whereas their surfaces have metallic properties and conduct electricity. A three-dimensional crystal of a topological insulator therefore conducts electricity on its surface, while no current can flow inside. Moreover, due to quantum mechanics, the conductivity on the surface is almost lossless — the electricity is conducted over long distances without heat generation.

In addition to these materials, there is another class known as second-order topological insulators. These three-dimensional crystals have conductive, one-dimensional channels running along only certain crystal edges. Materials of this kind are particularly well suited to potential applications in quantum computing.

Theoretical prediction

Experts assume that the semimetal bismuth exhibits some of the properties of a second-order topological material. Moreover, researchers have also predicted — from theory — that atomically thin layers of another semimetal, tungsten ditelluride (WTe2), will behave like second-order topological insulators — in other words, they will conduct electricity losslessly at the edges while the rest of the layer behaves like an insulator.

The team led by Professor Christian Schönenberger of the Department of Physics and the Swiss Nanoscience Institute at the University of Basel has now analyzed tiny tungsten ditelluride crystals consisting of between one and 20 layers. To determine the material’s electrical characteristics, they attached superconducting contacts to it before applying a magnetic field. As the material was sensitive to oxidation, the researchers worked in a special low-oxygen box and coated the tungsten ditelluride with another crystal, which was stable in air.

Characteristic oscillations

By analyzing the current flow within the main crystal, the scientists detected numerous slowly decaying oscillations. “Whereas a uniform current distribution leads to rapidly decaying oscillations, the extremely conductive edge states generate strongly oscillating, slowly decaying currents such as the ones we measured,” explains Dr. Artem Kononov, first author of the study and a Georg H. Endress fellow at the Department of Physics. “The only possible explanation for our results is that a large fraction of the current flows along the narrow edges.”

“These observations support theoretical predictions that tungsten ditelluride is a higher-order topological material. This opens up new possibilities for topological superconductivity, which could have applications in areas such as quantum computing,” says Christian Schönenberger, who is investigating topological superconductivity in stacks of certain two-dimensional materials as part of an ERC project.

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Materials provided by University of Basel. Note: Content may be edited for style and length.

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3D Printing Industry

Albirght Silicone introduces 3D printing capabilities; WACKER launches new ACEO silicone 3D printing material

3D printing with silicone is a rather niche area, however, activity does appear to be heating up. The two companies in this news update both offer 3D printing solutions for users who want to access the benefits and material properties of silicones. Albright Silicone, a Massachusetts-based engineering company, has launched a new 3D printing silicone […]

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Author: Anas Essop

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ScienceDaily

Martian landslides not conclusive evidence of ice

Detailed three-dimensional images of an extensive landslide on Mars, which spans an area more than 55 kilometres wide, have been analysed to understand how the unusually large and long ridges and furrows formed about 400 million years ago.

The findings, published today in Nature Communications, show for the first time that the unique structures on Martian landslides from mountains several kilometres high could have formed at high speeds of up to 360 kilometres per hour due to underlying layers of unstable, fragmented rocks.

This challenges the idea that underlying layers of slippery ice can only explain such long vast ridges, which are found on landslides throughout the Solar System.

First author, PhD student Giulia Magnarini (UCL Earth Sciences), said: “Landslides on Earth, particularly those on top of glaciers, have been studied by scientists as a proxy for those on Mars because they show similarly shaped ridges and furrows, inferring that Martian landslides also depended on an icy substrate.

“However, we’ve shown that ice is not a prerequisite for such geological structures on Mars, which can form on rough, rocky surfaces. This helps us better understand the shaping of Martian landscapes and has implications for how landslides form on other planetary bodies including Earth and the Moon.”

The team, from UCL, the Natural History Museum (London), Ben Gurion University of Negev (Israel) and University of Wisconsin Madison (USA), used images taken by NASA’s Mars Reconnaissance Orbiter to analyse some of the best-defined landslides remotely.

Cross-sections of the Martian surface in the Coprates Chasma in the Valles Marineris were analysed to investigate the relationship between the height of the ridges and width of the furrows compared to the thickness of the landslide deposit.

The structures were found to display the same ratios as those commonly seen in fluid dynamics experiments using sand, suggesting an unstable and dry rocky base layer is as feasible as an icy one in creating the vast formations.

Where landslide deposits are thickest, ridges form 60 metres high and furrows are as wide as eight Olympic-sized swimming pools end-to-end. The structures change as deposits thin out towards the edges of the landslide. Here, ridges are shallow at 10 metres high and sit closer together.

Co-author, Dr Tom Mitchell, Associate Professor of Earthquake Geology and Rock Physics (UCL Earth Sciences), said: “The Martian landslide we studied covers an area larger than Greater London and the structures within it are huge. Earth might harbour comparable structures but they are harder to see and our landforms erode much faster than those on Mars due to rain.

“While we aren’t ruling out the presence of ice, we know is that ice wasn’t needed to form the long run-outs we analysed on Mars. The vibrations of rock particles initiate a convection process that caused upper denser and heavier layers of rock to fall and lighter rocks to rise, similar to what happens in your home where warmed less dense air rises above the radiator. This mechanism drove the flow of deposits up to 40 km away from the mountain source and at phenomenally high speeds.”

The research team includes Apollo 17 astronaut, Professor Harrison Schmitt (University of Wisconsin Madison), who walked on the Moon in December 1972 and completed geologic fieldwork while on the lunar surface.

Professor Schmitt, said: “This work on Martian landslides relates to further understanding of lunar landslides such as the Light Mantle Avalanche I studied in the valley of Taurus-Littrow during Apollo 17 exploration and have continued to examine using images and data collected more recently from lunar orbit. Flow initiation and mechanisms on the Moon may be very different from Mars; however, comparisons often help geologists to understand comparable features.

“As on the Earth, the lunar meteor impact environment has modified the surface features of the Light Mantle Avalanche of the 75+ million years since it occurred. The impact redistribution of materials in the lunar environment has modified features that ultimately may be found to resemble those documented in the Martian landslide study.

“Of additional interest relative to the Light Mantle Avalanche deposit will be the forthcoming examination of a core from the upper 70 cm of the deposit obtained during Apollo 17 exploration. This previously protected core is in the process of being opened and examined by a large consortium of NASA and outside scientists. This important study of a Martian landslide, for the time being at least, has been confined to remotely sensed information.”

The research was funded by the Science and Technology Facilities Council (UK).

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svchamber.org

Shenango Valley Career Opportunities July 8

Many career opportunities in the Shenango Valley area – including with Solar Atmospheres of Western Pennsylvania; Miller Industries; Citizens Bank; Buhl Mansion Guesthouse & Spa; Eastwood Mall Complex; Shenango Valley Mall; Flynn’s Tire; WKBN 27 Youngstown OH & more! Plus check out our Lunch & Learns with Local Experts! Feel free to share this post as well! https://conta.cc/2NB3IC7

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Author: Sherris Moreira

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svchamber

Chamber Weekly Update May 28, 2019

Check out our weekly update for May 28 featuring members in the news and area events!


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Author: Sherris Moreira