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It’s a Small World – the World of Macro Photography

Macro photography is like a secret world. You can capture ordinary objects in a way that the human eye cannot see them, and create captivating images. Many people immediately think flowers and bugs at the mention of the word macro, but there are so many other great options. This is meant to inspire you to […]

The post It’s a Small World – the World of Macro Photography by appeared first on Digital Photography School.

via Digital Photography School
It’s a Small World – the World of Macro Photography

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Why Warren Buffett Rocks

A new NBER working paper (abstract; PDF) analyzes Warren Buffett‘s Berkshire Hathaway and the drivers of its stock market success. Beyond benefiting from Buffett’s ability to buy low and sell high, Berkshire has also been able to borrow cheaply: 

Berkshire Hathaway has realized a Sharpe ratio of 0.76, higher than any other stock or mutual fund with a history of more than 30 years, and Berkshire has a significant alpha to traditional risk factors. However, we find that the alpha becomes insignificant when controlling for exposures to Betting-Against-Beta and Quality-Minus-Junk factors. Further, we estimate that Buffett’s leverage is about 1.6-to-1 on average. Buffett’s returns appear to be neither luck nor magic, but, rather, reward for the use of leverage combined with a focus on cheap, safe, quality stocks. Decomposing Berkshires’ portfolio into ownership in publicly traded stocks versus wholly-owned private companies, we find that the former performs the best, suggesting that Buffett’s returns are more due to stock selection than to his effect on management. These results have broad implications for market efficiency and the implementability of academic factors.

via Freakonomics » Blog
Why Warren Buffett Rocks

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Installing MySQL 5.7 DMR3 with the official yum repos

In case you missed Norvald’s post, the official yum repos now support the 5.7 development releases!
The MySQL manual documents how you can enable 5.7, but I wanted to also provide a quick demonstration since using yum sub-repositories is a new concept to me.
Installing the repo
All versions of MySQL are downloaded via a single repo file, which can be downloaded from: http://dev.mysql.com/downloads/repo/.
You can copy the URL from the download page directly into a yum localinstall command. For example on Enterprise Linux 6, the command is:
sudo yum localinstall http://dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm
Activating MySQL 5.7
The default version of MySQL enabled with the repo will be MySQL 5.6 GA. The documented way to change this to 5.7 is:
shell> sudo yum-config-manager –disable mysql56-community
shell> sudo yum-config-manager –enable mysql57-community-dmr
You also have the option to manually edit the sources.list file, which if you run the above commands will now contain:
[root@mysqlrpm ~]# cat /etc/yum.repos.d/mysql-community.repo
[mysql-connectors-community]
name=MySQL Connectors Community
baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql-tools-community]
name=MySQL Tools Community
baseurl=http://repo.mysql.com/yum/mysql-tools-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.5
[mysql55-community]
name=MySQL 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.6
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Note: MySQL 5.7 is currently in development. For use at your own risk.
# Please read with sub pages: https://dev.mysql.com/doc/relnotes/mysql/5.7/en/
[mysql57-community-dmr]
name=MySQL 5.7 Community Server Development Milestone Release
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
From there, a yum install will show MySQL 5.7 as the intended version to be installed:
[root@mysqlrpm ~]# yum install mysql-community-server
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: ftp.osuosl.org
* extras: ftp.osuosl.org
* updates: ftp.osuosl.org
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package mysql-community-server.x86_64 0:5.7.3-0.1.m13.el6 will be installed
–> Finished Dependency Resolution
Dependencies Resolved
====================================================================================================================================================================
Package Arch Version Repository Size
====================================================================================================================================================================
Installing:
mysql-community-server x86_64 5.7.3-0.1.m13.el6 mysql57-community-dmr 62 M
Transaction Summary
====================================================================================================================================================================
Install 1 Package(s)
Total download size: 62 M
Installed size: 281 M
Is this ok [y/N]:
via Planet MySQL
Installing MySQL 5.7 DMR3 with the official yum repos

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3 Questions to Ask at Dinner to Make Your Family Stronger

3 Questions to Ask at Dinner to Make Your Family Stronger

More and more research studies are concluding that regular dinners are the key to a happy, healthy family. Dinnertime is a great time to discuss how well your family is working. The Week highlights an agile approach to this (something we’ve seen similarly applied to parenting in general).

Taking excerpts from the book The Secrets of Happy Families, The Week quotes Scrum software developer Jeff Sutherland‘s approach:

The centerpiece of the program is a weekly review session built on the principle of "inspect and adapt."

Three questions get asked:

1. What things went well in our family this week?
2. What things could we improve in our family?
3. What things will you commit to working on this week?

You don’t have to actually fire off those questions directly like that, but those three things are good ones to discuss with your family on a regular basis. Just having regular dinners and meaningful conversations during them could improve just about everything parents worry about. If the agile approach isn’t for you, try the 10-50-1 formula also taken from the book:

10. Aim for ten minutes of quality talk per meal. .. 50. Let your kids speak at least half the time. … 1. Teach your kids one new word every meal.

Hit up the link below for lots more family bonding advice.

The secrets of happy families | The Week

Photo by Lars Plougmann.


via Lifehacker
3 Questions to Ask at Dinner to Make Your Family Stronger