My first trial to use the protocol JT65A with WSJT-X.
The signal is on the air!
It’s Not Your Ears, It’s Your Brain
There is an interesting article here from the University of Maryland.
“For older listeners, even when there isn’t any noise, the brain is already having trouble processing the speech.” said one of the authors of the paper titled, Evidence of degraded representation of speech in noise, in the aging midbrain and cortex, recently appeared in Journal of Neurophysiology.
The author also said “Older people need more time to figure out what a speaker is saying. They are dedicating more of their resources and exerting more effort than younger adults when they are listening to speech.”
“Because they have normal hearing, talking louder does not help. So if someone is having trouble understanding you in a noisy restaurant or in a crowded room, it is most important to speak clearly at a normal or slightly slower than normal rate. Your older loved ones will appreciate this courtesy during the upcoming holidays!”, another author said.
Weeell, whaaat dooo yooouuu thiiink? Shall we QRS even if not asked?
Ubuntu 16.10
Upgraded from 16.04 LTS. Not very prudent? Well, Unix used to be the only OS for me for a very long time, but I feel that it became just one of the operating systems for me for the last several years. Mission critical tasks are no more running on my Unix machines, and they are powered on only occasionally, not 24 hours a day, 365 days a year.
My First 4k Monitor
I am using a 27-inch 4k monitor with my Mac mini (Late 2014, macOS Sierra version 10.12) via HDMI interface.
Do you suspect that a 27-inch display is too small for a resolution of 3840 x 2160? The answer may differ for each individual, but for me, it’s OK without using larger font sizes such as 125% or 150%.
FLTK (Fast Light Toolkit)
FLTK is a cross-platform C++ GUI toolkit to provide GUI functionality.
% fltk-config --compile mytest.cxx && ./mytest
Note that I had to edit the following four lines to successfully compile the source.
% grep -n "enum" ~/Downloads/fltk-1.3.3/src/fl_line_style.cxx
38:static /* enum */ CGLineCap fl_quartz_line_cap_ = kCGLineCapButt;
39:static /* enum */ CGLineJoin fl_quartz_line_join_ = kCGLineJoinMiter;
113: static /* enum */ CGLineCap Cap[4] = { kCGLineCapButt, kCGLineCapButt,
115: static /* enum */ CGLineJoin Join[4] = { kCGLineJoinMiter, kCGLineJoinMiter,
% make
% sudo make install
Did you know that Fldigi uses FLTK, and thus is cross-platform?
Computer Name (2)
The local network name is your computer’s name with “.local” added, and any spaces are replaced with hyphens -. For example, if your computer’s name is My Computer, your local network name is “My-Computer.local.” If your Mac has the exact name of another Mac on your local network, a number is added to the local network name.
Local network names are not case sensitive, so “my-computer.local” is the same as “My-Computer.local.”
https://support.apple.com/kb/PH25384?viewlocale=en_US&locale=en_US
So, what’s in a HostName?
% man scutil
SCUTIL(8) BSD System Manager's Manual SCUTIL(8)
NAME
scutil -- Manage system configuration parameters
--set pref [newval]
Updates the specified preference with the new value. If the new value is not specified on the com-
mand line then it will be read from standard input.
Supported preferences include: ComputerName LocalHostName HostName
Computer Name
What’s in a name? Well, let’s see:
Mac-mini:~ user1$ echo $PS1 \h:\W \u\$ Mac-mini:~ user1$ export PS1="[\H] " [Mac-mini.local] scutil --get ComputerName Mac mini [Mac-mini.local] scutil --get LocalHostName Mac-mini [Mac-mini.local] scutil --get HostName HostName: not set [Mac-mini.local] hostname Mac-mini.local
By the way, do you know what happens to your Time Machine if you change your hostname?