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2015
485

How transistors really work (1995)

Most technician textbooks do a very poor job of explaining the details of transistors' internal workings. First they assume that the Base current is somehow controlling the Collector current, then they try to explain how one current can affect another. These explanations invariably fail because Bipolar transistors…

491

Why ninety-day lifetimes for certificates?

This is a historic blog post at this point. Please see our certificate lifetime documentation for the current status of certificate lifetimes. We’re sometimes asked why we only offer certificates with ninety-day lifetimes. People who ask this are usually concerned that ninety days is too short and wish we would offer…

492

What MongoDB got right

MongoDB is perhaps the most-widely-mocked piece of software out there right now. While some of the mockery is out-of-date or rooted in misunderstandings, much of it is well-deserved, and it’s difficult to disagree that much of MongoDB’s engineering is incredibly simplistic, inefficient, and immature compared to…

493

Public Beta: December 3, 2015

Let’s Encrypt will enter Public Beta on December 3, 2015. Once we’ve entered Public Beta our systems will be open to anyone who would like to request a certificate. There will no longer be a requirement to sign up and wait for an invitation. Our Limited Beta started on September 12, 2015. We’ve issued over 11,000…

497

ImperialViolet

Thomas Ptacek laid out a number of arguments against DNSSEC recently (and in a follow up ). We don't fully agree on everything, but it did prompt me to write why, even if you assume DNSSEC, DANE (the standard for speaking about the intersection of TLS and DNSSEC) is not a foregone conclusion in web browsers.

498

How Insects Breathe

Tại Việt Nam, sự gia tăng phổ biến của trò chơi điện tử đang định hình lại bối cảnh cá cược thể thao. Khi các game thủ trẻ đắm mình vào các cuộc thi ảo, niềm đam mê của họ sẽ