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Category: Construction Engineering

Cloudflare named a leader in The Forrester Wave: DDoS Mitigation Solutions

Cloudflare has been recognized as a leader in the “Forrester WaveTM: DDoS Mitigation Solutions, Q4 2017.” The DDoS landscape continues to evolve. The increase in sophistication, frequency, and range of targets of DDoS attacks has placed greater demands on DDoS providers, many of which were evaluated in the report. This year, Cloudflare received the highest scores possible in 15 criteria, including: Length of Implementation Layers 3 and 4 Attacks Mitigation DNS Attack Mitigation IoT Botnets Multi-Vector Attacks Filtering Deployment Secure…

Scaling Slack’s Job Queue – Several People Are Coding

Robustly Handling Billions of Tasks in Milliseconds Using Kafka and Redis by Saroj Yadav, Matthew Smillie, Mike Demmer, and Tyler Johnson. Slack uses a job queue system for business logic that is too time-consuming to run in the context of a web request. This system is a critical component of our architecture, used for every Slack message post, push notification, URL unfurl, calendar reminder, and billing calculation. On our busiest days, the system processes over 1.4 billion jobs at a peak…

Novel approach to concrete protection slows deterioration in harsh conditions

The material works by absorbing water that exists within the concrete to form crystals . Credit: Brunel University Using crystallising admixture and wax-based curing agents significantly improves the performance of concrete in harsh conditions, a new study from Brunel University London suggests. Researchers discovered that concrete facing a harsh environment – for example heavy rainfall or high winds – deteriorates slower when a crystallising material is added to the fresh mixture, followed by a wax-based curing agent. The findings,…

Remains of historic aircraft found

The “Raise the Arrow” team gathers for a photo behind the AUV. Credit: Fraunhofer IOSB-AST DEDAVE is an innovative autonomous underwater vehicle developed by researchers at the Fraunhofer-Gesellschaft. Now the deep-diving robot has had its first chance to prove itself in action as it helped hunt down historic test models of a Canadian interceptor aircraft in Lake Ontario. The mission has been a success, with two of the confirmed eight aircraft models already tracked down. Designed for deepwater diving, autonomous…

Recommending Visually Similar Products Using Content Based Features |

Multiple recommendation systems at Wayfair use collaborative filtering based models to understand user behavior and identify like-minded customers. Despite its success, collaborative filtering has a few significant drawbacks, such as the cold start problem and a limited scope of recommendable products. By leveraging image based product embeddings, Wayfair has created a new recommendation algorithm based on product visual similarity.  This post will begin by briefly describing Wayfair’s Visual Search feature. We will then summarize the difference between collaborative and content…

Improving Resiliency and Stability of a Large-scale Monolithic API Service

How was multi-clustering achieved?We started by partitioning the endpoints of our service. This was relatively easy to do, because endpoints in the service were already divided into separate ownership groups called “verticals.” Then, using the data collected by our monitoring systems, we identified the verticals that had enough traffic to justify separating them. Then, we laid out the plans. We prepared a runbook that described each step we would take for each vertical. We also prepared a schedule skeleton that…

Identifying optimal adaptation of buildings threatened by hurricanes, climate change — ScienceDaily

The need for adaptation strategies to reduce the threat of hurricanes to society is of critical importance, as evidenced by the recent damage to coastal regions in the U.S. and the Caribbean this past year. The fact that the number of residential buildings in coastal areas has increased significantly combined with the increasing risks of impacts of due climate change means that the cost of damage to coastal developments are likely to continue to rise. According to Dan M. Frangopol,…

uKit : The Website Builder for Business

Many businesses are going online every second while some businesses struggle to get their online footprint. They generally face a brawl with technical details underlying in the basic architecture of the website. So, we browsed the internet to seek a possible solution to this problem and stumbled upon uKit, an intuitive and budget-friendly website building solution for small businesses. Let us have a detailed look at what we can achieve with uKit’s resources and why one should prefer it over…

Namespacing Actions for Redux – Kickstarter Engineering

Constraints In this way, the first level of research allowed us to flesh out what requirements a successful solution would support. We needed a way to namespace actions that: Did not involve using local state Worked with combineReducers Could be applied programmatically Had a low–API surface area, which is to say, did not ask to much of others using the resultant component The RFC With these constraints in mind, we identified three solutions: nested reducers, higher-order reducers, and the module…

SCOTUS Wanders into Patent Troll Fight

Next Monday, the US Supreme Court will hear oral arguments in Oil States Energy Services, LLC vs. Greene’s Energy Group, LLC, which is a case to determine whether the Inter Partes Review (IPR) administrative process at the US Patent and Trademark Office (USPTO) used to determine the validity of patents is constitutional. The constitutionality of the IPR process is one of the biggest legal issues facing innovative technology companies, as the availability of this process has greatly reduced the anticipated…