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Category: Construction Engineering

Low-power, flexible memristor circuit for mobile and wearable devices

Figure 1. Schematic illustration and cross-sectional TEM image of flexible memristive nonvolatile logic-in-memory circuit. Credit: Korea Advanced Institute of Science and Technology A KAIST research team succeeded in developing an energy efficient, nonvolatile logic-in-memory circuit by using a memristor. This novel technology can be used as an energy efficient computing architecture for battery-powered flexible electronic systems, such as mobile and wearable devices. Professor Sung-Yool Choi from the School of Electrical Engineering and Professor Sang-Hee Ko Park from the Department of…

Technology to improve the resilience of bridges

Satzengraben bridge – Austria’s longest integral abutment bridge. Credit: Vienna University of Technology Bridges change shape, which is why they are usually built with expansion joints. At TU Wien, a technology has been developed that makes it possible to forego these joints, thus saving time and money. You can feel it straight away when you drive over a bridge quickly: the expansion joint that you rumble over at the start and end of the bridge. These joints are necessary as…

Building Reliable Reprocessing and Dead Letter Queues with Kafka

In distributed systems, retries are inevitable. From network errors to replication issues and even outages in downstream dependencies, services operating at a massive scale must be prepared to encounter, identify, and handle failure as gracefully as possible. Given the scope and pace at which Uber operates, our systems must be fault-tolerant and uncompromising when it comes to failing intelligently. To accomplish this, we leverage Apache Kafka, an open source distributed messaging platform, which has been industry-tested for delivering high performance…

Heat may detect invisible damage in concrete supports

TNDT of reinforced concrete supports. Credit: Tomsk Polytechnic University (TPU) Scientists from Tomsk Polytechnic University together with specialists from NTC Tekhnika proposed thermal non-destructive testing to inspect reinforced concrete supports. It enables efficiently and quickly detecting the corrosion of steel reinforcement hidden behind the concrete shell of the supporting structure. Developers have already studied 14 reinforced concrete supports in Tomsk region. The outcomes of the study were published in Applied Sciences. TPU Professor Vladimir Vavilov, the head of R&D Laboratory…

A student team discovered a solution for municipalities looking to save money and for homeowners hoping to avoid snow shovel duty — ScienceDaily

Snow storms often leave behind reminders of their presence for days — sometimes weeks — after warmer and sunnier weather returns. Snowbanks, often created by snow plows as they clear major roadways, can linger in parking lots, on sidewalks, and in driveways even when temperatures rise well above freezing. Fresh snow’s highly reflective surface is the culprit of this phenomenon, dramatically minimizing any potential melting effects from the sun’s heat. Cities in cold regions typically resort to active methods to…

How production engineers support global events on Facebook | Engineering Blog | Facebook Code

People around the world come to Facebook to celebrate and share experiences during special events, such as the Olympics or New Year’s Eve. These types of global occurrences can cause spikes in the load and traffic patterns on Facebook’s systems, especially with high-bandwidth content like Facebook Live videos. The Production Engineering team at Facebook carefully plans and builds infrastructure to ensure service uptime and reliability even through such spikes. Facebook’s infrastructure is set up to accommodate different types of traffic…

New images reveal how the ear’s sensory hairs take shape — ScienceDaily

Our ears are exquisite detection instruments, capable of discerning a whisper or distinct notes of music within a symphony. To pick up these sounds, tiny hair-like filaments in the inner ear must be packed into precisely arranged bundles, all facing the same direction. Images of the normal, tidy architecture of these bundles on cells within the cochlea, the inner ear structure responsible for hearing, were captured by researchers in A. James Hudspeth’s lab at The Rockefeller University (top image). This…

Building with waste and recycled material

Credit: Zooey Braun – Stuttgart A residential module fully constructed from reusable, recyclable, and compostable materials: This is the premise for the newest unit in NEST, the modular research and innovation building run by Empa and Eawag in Dübendorf. On 8 February 2018, the NEST “Urban Mining & Recycling” unit will open its doors and henceforth house two students. At the same time, as an active lab it will also help to advance the construction industry’s transition to a recycling…

Lessons Learned from LinkedIn’s Data Center Journey

I recently had the pleasure of speaking to groups of data center executives and strategists at the DCD Zettastructure conference in Singapore and at the DCD Converged conference in Hong Kong. Putting my thoughts together for these talks gave me a rare chance to step back and reflect on LinkedIn’s amazing infrastructure journey and our accomplishments over the past eight years. Over the last several years at LinkedIn, our steep growth in members, sessions, and engagement has generated an exponential need…

Letting molecular robots swarm like birds — ScienceDaily

A team of researchers from Hokkaido University and Kansai University has developed DNA-assisted molecular robots that autonomously swarm in response to chemical and physical signals, paving the way for developing future nano-machines. The world’s smallest “swarm robot” measures 25 nanometers in diameter and 5 micrometers in length, and exhibits swarming behavior resembling motile organisms such as fish, ants and birds. “Swarm robots are one of the most elusive subjects in robotics,” says Akira Kakugo of the research team at Hokkaido…