BlogDB

Mar 25, 2019 from Renfei Mao on flujoo

什么是科学的课程设计？

在教育行业，说一个东西是「科学的」往往是很高的评价。家长希望孩子上的培训课是科学的，培训机构也喜欢用科学来标榜自己。 那怎么样的课程是真正科学的？这篇文章从课程效果评估的角度来谈这个问题。 从课程效果说起 课程有没有效果，有什么效果，这些是家长非常关心的问题。 有的课程，效果评估起来比较简单，凭借直觉就可以判断。比如你上了减肥课，结果发现自己无情地胖了，那么你可以愤怒地说，这个课没效果！比如...

Mar 22, 2019 from Renfei Mao on flujoo

记忆训练有用吗？

简单地说，有用。 但是记忆训练或者记忆策略并不只有单一的一种，本文将要探讨三类，这三类记忆训练侧重点并不相同： 第一类让你记得更「快」。 第二类让你记得更「多」。 第三类让你记得更「久」。 而这三类记忆训练的效果也各不相同： 第一类暂时缺乏有力的证据证明其有用。 第二类有用，但是效果的范围有限。 第三类有用，但是效果的程度有限。 第一类记忆训练：记得更快 简单粗暴地打个比方：记住东西的过程就...

Mar 14, 2019 from Renfei Mao on flujoo

要不要奖励孩子？

奖励在教育中非常普遍。孩子考试得高分，父母买玩具作为奖励。父母这么做通常是希望通过奖励来进一步激励孩子的学习热情。 但你可能也听过这么一种观点，奖励不但没法激励学习热情，反而可能损害。奖励会让孩子觉得学习就是为了获得奖励。久而久之，孩子会失去对学习本身的喜爱。 哪种观点是对的？心理学对此有过深入的探讨，颇为曲折。我们来看一看。 核心概念：内部动机 批判奖励的观点认为，奖励会损害孩子的学习热情...

Feb 26, 2019 from Remains of the Day

Status as a Service (StaaS)

Editor's Note 1: I have no editor. Editor’s Note 2: I would like to assure new subscribers to this blog that most my posts are not as long as this one. Or as long as my previous one. My long break ...

Feb 20, 2019 from Nadav Ami

Learning by Failing (IoT Camera Hacking) - Lightning Talk

This is a lightning talk about my journey hacking an IoT camera and the things I learned while failing at doing so. This was also my first solo talk! The slides are also available for download as p...

Feb 17, 2019 from Coding Horror

The Cloud Is Just Someone Else’s Computer

When we started Discourse in 2013, our server requirements were high:1GB RAMmodern, fast dual core CPUspeedy solid state drive with 20+ GBI’m not talking about a cheapo shared cpanel server, either...

Jan 31, 2019 from Nadav Ami

3018 CNC Machine Spindle & Laser Mount

I made a little holder for the spindle/laser on my 3018 CNC. This way, when I’m using one I can keep the other on the machine and swap between them easily. If you want to print your own, the files ...

Jan 21, 2019 from Nadav Ami

Adding Limit Switches to 3018 CNC Machine

Here’s how I added some limit/homing switches to my 3018 CNC machine. Parts Needed 3D printed mounts - Thingiverse Micro switches w/ long lever (V-153-1C25) - AliExpress Affiliate Dupont connector ...

Jan 21, 2019 from [tekovic.com~]#

Installing Tesseract OCR 4.0 on CentOS 6

Tesseract OCR package is available for CentOS 6 via EPEL yum repository, but unfortunately, at the time of writing this article, the latest available Tesseract version in EPEL is 3.0.4. Installing ...

Jan 18, 2019 from Nadav Ami

List of 3018 CNC Upgrades

Below is a fairly messy list of upgrades done (or planned to be) to the cheap “3018 CNC” mills/laser engravers. Planned Power Switch Cable Management Completed X, Y, Z Limit/Home Switches Spindle a...

Nov 08, 2018 from [tekovic.com~]#

Solr full text search for Dovecot

Dovecot is great POP3/IMAP mail server but its internal search mechanism falls short when dealing with large mailboxes. Search is not only super slow, but also extremely resource intensive on both ...

Oct 22, 2018 from Coding Horror

What does Stack Overflow want to be when it grows up?

I sometimes get asked by regular people in the actual real world what it is that I do for a living, and here’s my 15 second answer:We built a sort of Wikipedia website for computer programmers to p...

Sep 21, 2018 from Coding Horror

There is no longer any such thing as Computer Security

Remember “cybersecurity”?Mysterious hooded computer guys doing mysterious hooded computer guy... things! Who knows what kind of naughty digital mischief they might be up to?Unfortunately, we now li...

Sep 06, 2018 from Nadav Ami

Maintaining a Healthy CI/CD Pipeline

First, a bit of context Yesterday, I took part in a discussion with a few colleagues about how we should be maintaining our CI/CD pipelines. Recently, some of them have been staying in a failed sta...

May 29, 2018 from Lorenzo Setale's Blog

Blockchain: is it good for humanity?

The journey that I have decided to take with Siderus brought myself always in embarrassing moment on meetings Hyped discussion about “Blockchain” and data storage. In this article I don’t want to t...

May 22, 2018 from Remains of the Day

Invisible asymptotes

"It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if ...

May 15, 2018 from Remains of the Day

What I learned from a Taipei alley

I was in Taipei the past few weeks working on a documentary with friends. Because of a busy schedule, it wasn't like my usual travels abroad for fun, it felt more like a work trip. Still, even if I...

Apr 15, 2018 from Remains of the Day

The inefficiency of large, infrequent transactions

In a conversation with Matt Levine, Tyler Cowen asks:COWEN: Like you, I’m mostly an efficient markets guy, but when I look at initial public offerings I’m very baffled because investment banks take...

Mar 20, 2018 from Remains of the Day

Catch up

It has been some time since I posted here. Outside of lots of meetings around the country and some trips with family and friends, a few creative projects have stolen the lion's share of my free tim...

Jan 26, 2018 from Randall Degges

Please Stop Using Local Storage

Seriously. Just stop it already. I don’t know what it is, exactly, that drives so many developers to store session information in local storage, but whatever the reason: the practice needs to die o...