Earthcare Cloud Mission Launches To Resolve Climate Unknowns

An anonymous reader quotes a report from the BBC: A sophisticated joint European-Japanese satellite has launched to measure how clouds influence the climate. Some low-level clouds are known to cool the planet, others at high altitude will act as a blanket. The Earthcare mission will use a laser and a radar to probe the atmosphere to see precisely where the balance lies. It’s one of the great uncertainties in the computer models used to forecast how the climate will respond to increasing levels of greenhouse gases. “Many of our models suggest cloud cover will go down in the future and that means that clouds will reflect less sunlight back to space, more will be absorbed at the surface and that will act as an amplifier to the warming we would get from carbon dioxide,” Dr Robin Hogan, from the European Centre for Medium-Range Weather Forecasts, told BBC News.

The 2.3-tonne satellite was sent up from California on a SpaceX rocket. The project is led by the European Space Agency (ESA), which has described it as the organization’s most complex Earth observation venture to date. Certainly, the technical challenge in getting the instruments to work as intended has been immense. It’s taken fully 20 years to go from mission approval to launch. Earthcare will circle the Earth at a height of about 400km (250 miles). It’s actually got four instruments in total that will work in unison to get at the information sought by climate scientists.

The simplest is an imager — a camera that will take pictures of the scene passing below the spacecraft to give context to the measurements made by the other three instruments.
Earthcare’s European ultraviolet laser will see the thin, high clouds and the tops of clouds lower down. It will also detect the small particles and droplets (aerosols) in the atmosphere that influence the formation and behavior of clouds. The Japanese radar will look into the clouds, to determine how much water they are carrying and how that’s precipitating as rain, hail and snow. And a radiometer will sense how much of the energy falling on to Earth from the Sun is being reflected or radiated back into space.

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Huge Google Search Document Leak Reveals Inner Workings of Ranking Algorithm

Danny Goodwin reports via Search Engine Land: A trove of leaked Google documents has given us an unprecedented look inside Google Search and revealed some of the most important elements Google uses to rank content. Thousands of documents, which appear to come from Google’s internal Content API Warehouse, were released March 13 on Github by an automated bot called yoshi-code-bot. These documents were shared with Rand Fishkin, SparkToro co-founder, earlier this month.

What’s inside. Here’s what we know about the internal documents, thanks to Fishkin and [Michael King, iPullRank CEO]:

Current: The documentation indicates this information is accurate as of March.
Ranking features: 2,596 modules are represented in the API documentation with 14,014 attributes.
Weighting: The documents did not specify how any of the ranking features are weighted — just that they exist.
Twiddlers: These are re-ranking functions that “can adjust the information retrieval score of a document or change the ranking of a document,” according to King.
Demotions: Content can be demoted for a variety of reasons, such as: a link doesn’t match the target site; SERP signals indicate user dissatisfaction; Product reviews; Location; Exact match domains; and/or Porn.
Change history: Google apparently keeps a copy of every version of every page it has ever indexed. Meaning, Google can “remember” every change ever made to a page. However, Google only uses the last 20 changes of a URL when analyzing links.

Other interesting findings. According to Google’s internal documents:
Freshness matters — Google looks at dates in the byline (bylineDate), URL (syntacticDate) and on-page content (semanticDate).
To determine whether a document is or isn’t a core topic of the website, Google vectorizes pages and sites, then compares the page embeddings (siteRadius) to the site embeddings (siteFocusScore).
Google stores domain registration information (RegistrationInfo).
Page titles still matter. Google has a feature called titlematchScore that is believed to measure how well a page title matches a query.
Google measures the average weighted font size of terms in documents (avgTermWeight) and anchor text.
What does it all mean? According to King: “[Y]ou need to drive more successful clicks using a broader set of queries and earn more link diversity if you want to continue to rank. Conceptually, it makes sense because a very strong piece of content will do that. A focus on driving more qualified traffic to a better user experience will send signals to Google that your page deserves to rank.” […] Fishkin added: “If there was one universal piece of advice I had for marketers seeking to broadly improve their organic search rankings and traffic, it would be: ‘Build a notable, popular, well-recognized brand in your space, outside of Google search.'”

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Chromebooks Will Get Gemini and New Google AI Features

Google is introducing the Gemini AI chatbot to Chromebook Plus models, enhancing features like text rewriting, image editing, and hands-free control. Here are a few of the top new features coming to ChromeOS, as summarized by Wired: The first notable feature is Help Me Write, which works in any text box. Select text in any text box and right-click — you’ll see a box next to the standard right-click context menu. You can ask Google’s AI to rewrite the selected text, rephrase it in a specific way, or change the tone. I tried to use it on a few sentences in this story but did not like any of the suggestions it gave me, so your mileage may vary. Or maybe I’m a better writer than Google’s AI. Who knows?

Google’s bringing the same generative AI wallpaper system you’ll find in Android to ChromeOS. You can access this feature in ChromeOS’s wallpaper settings and generate images based on specific parameters. Weirdly, you can create these when you’re in a video-calling app too. You’ll see a menu option next to the system tray whenever the microphone and video camera are being accessed — tap on it and click “Create with AI” and you can generate an image for your video call’s background. I’m not sure why I’d want a background of a “surreal bicycle made of flowers in pink and purple,” but there you go. AI!

Here’s something a little more useful: Magic Editor in Google Photos. Yep, the same feature that debuted in Google’s Pixel 8 smartphones is now available on Chromebook Plus laptops. In the Google Photos app, you can press Edit on a photo and you’ll see the option for Magic Editor. (You’ll need to download more editing tools to get started.) This feature lets you erase unwanted objects in your photos, move a subject to another area of the frame, and fill in the backgrounds of photos. I successfully erased a paint can in the background of a photo of my dog, and it worked pretty quickly.

Then there’s Gemini. It’s available as a stand-alone app, and you can ask it to do pretty much anything. Write a cover letter, break down complex topics, ask for travel tips for a specific country. Just, you know, double-check the results and make sure there aren’t any hallucinations. If you want to tap into Google’s Gemini Advanced model, the company says it is offering 12 months free for new Chromebook Plus owners through the end of the year, so you have some time to redeem that offer. This is technically an upgrade from Google One, and it nets you Gemini for Workspace, 2 terabytes of storage, and a few other perks. New features coming to all Chromebooks include easy setup with Android phones via QR code for sharing Wi-Fi credentials, integration of Google Tasks into the system tray, a Game Dashboard for mapping controls and recording gameplay as GIFs, and a built-in screen recorder tool. Upcoming enhancements also include Hands-Free Control using face gestures, the Help Me Read feature with Gemini for summarizing websites and PDFs, and an Overview screen to manage open browser windows, tabs, and apps.

You can check if your Chromebook is compatible with the Chromebook Plus OS update here.

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Instead of ‘Auth,’ We Should Say ‘Permissions’ and ‘Login’

The term “auth” is ambiguous, often meaning either authentication (authn) or authorization (authz), which leads to confusion and poor system design. Instead, Nicole Tietz-Sokolskaya, a software engineer at AI market research platform Remesh, argues that the industry adopt the terms “login” for authentication and “permissions” for authorization, as these are clearer and help maintain distinct, appropriate abstractions for each concept. From their blog post: We should always use the most clear terms we have. Sometimes there’s not a great option, but here, we have wonderfully clear terms. Those are “login” for authentication and “permissions” for authorization. Both are terms that will make sense with little explanation (in contrast to “authn” and “authz”, which are confusing on first encounter) since almost everyone has logged into a system and has run into permissions issues. There are two ways to use “login” here: the noun and the verb form. The noun form is “login”, which refers to the information you enter to gain access to the system. And the verb form is “log in”, which refers to the action of entering your login to use the system. “Permissions” is just the noun form. To use a verb, you would use “check permissions.” While this is long, it’s also just… fine? It hasn’t been an issue in my experience.

Both of these are abundantly clear even to our peers in disciplines outside software engineering. This to me makes it worth using them from a clarity perspective alone. But then we have the big benefit to abstractions, as well. When we call both by the same word, there’s often an urge to combine them into a single module just by dint of the terminology. This isn’t necessarily wrong — there is certainly some merit to put them together, since permissions typically require a login. But it’s not necessary, either, and our designs will be stronger if we don’t make that assumption and instead make a reasoned choice.

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Intel Removes Knights Mill and Knights Landing Xeon Phi Support In LLVM 19