# -*-Shell-script-*-
#
# functions This file contains functions to be used by most or all
# shell scripts in the /etc/init.d directory.
#
TEXTDOMAIN=initscripts
# Make sure umask is sane
umask 022
# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH
if [ $PPID -ne 1 -a -z "$SYSTEMCTL_SKIP_REDIRECT" ] && \
[ -d /run/systemd/system ] ; then
case "$0" in
/etc/init.d/*|/etc/rc.d/init.d/*)
_use_systemctl=1
;;
esac
fi
systemctl_redirect () {
local s
local prog=${1##*/}
local command=$2
local options=""
case "$command" in
start)
s=$"Starting $prog (via systemctl): "
;;
stop)
s=$"Stopping $prog (via systemctl): "
;;
reload|try-reload)
s=$"Reloading $prog configuration (via systemctl): "
;;
restart|try-restart|condrestart)
s=$"Restarting $prog (via systemctl): "
;;
esac
if [ -n "$SYSTEMCTL_IGNORE_DEPENDENCIES" ] ; then
options="--ignore-dependencies"
fi
if ! systemctl show "$prog.service" > /dev/null 2>&1 || \
systemctl show -p LoadState "$prog.service" | grep -q 'not-found' ; then
action $"Reloading systemd: " /bin/systemctl daemon-reload
fi
action "$s" /bin/systemctl $options $command "$prog.service"
}
# Get a sane screen width
[ -z "${COLUMNS:-}" ] && COLUMNS=80
if [ -z "${CONSOLETYPE:-}" ]; then
if [ -c "/dev/stderr" -a -r "/dev/stderr" ]; then
CONSOLETYPE="$(/sbin/consoletype < /dev/stderr 2>/dev/null)"
else
CONSOLETYPE="serial"
fi
fi
if [ -z "${NOLOCALE:-}" ] && [ -z "${LANGSH_SOURCED:-}" ] && \
[ -f /etc/sysconfig/i18n -o -f /etc/locale.conf ] ; then
. /etc/profile.d/lang.sh 2>/dev/null
# avoid propagating LANGSH_SOURCED any further
unset LANGSH_SOURCED
fi
# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
if [ -f /etc/sysconfig/init ]; then
. /etc/sysconfig/init
else
# This all seem confusing? Look in /etc/sysconfig/init,
# or in /usr/share/doc/initscripts-*/sysconfig.txt
BOOTUP=color
RES_COL=60
MOVE_TO_COL="echo -en \\033[${RES_COL}G"
SETCOLOR_SUCCESS="echo -en \\033[1;32m"
SETCOLOR_FAILURE="echo -en \\033[1;31m"
SETCOLOR_WARNING="echo -en \\033[1;33m"
SETCOLOR_NORMAL="echo -en \\033[0;39m"
LOGLEVEL=1
fi
if [ "$CONSOLETYPE" = "serial" ]; then
BOOTUP=serial
MOVE_TO_COL=
SETCOLOR_SUCCESS=
SETCOLOR_FAILURE=
SETCOLOR_WARNING=
SETCOLOR_NORMAL=
fi
fi
# Check if any of $pid (could be plural) are running
checkpid() {
local i
for i in $* ; do
[ -d "/proc/$i" ] && return 0
done
return 1
}
__kill_pids_term_kill_checkpids() {
local base_stime=$1
shift 1
local pid=
local pids=$*
local remaining=
local stat=
local stime=
for pid in $pids ; do
[ ! -e "/proc/$pid" ] && continue
read -r line < "/proc/$pid/stat" 2> /dev/null
stat=($line)
stime=${stat[21]}
[ -n "$stime" ] && [ "$base_stime" -lt "$stime" ] && continue
remaining+="$pid "
done
echo "$remaining"
[ -n "$remaining" ] && return 1
return 0
}
__kill_pids_term_kill() {
local try=0
local delay=3;
local pid=
local stat=
local base_stime=
# We can't initialize stat & base_stime on the same line where 'local'
# keyword is, otherwise the sourcing of this file will fail for ksh...
stat=($(< /proc/self/stat))
base_stime=${stat[21]}
if [ "$1" = "-d" ]; then
delay=$2
shift 2
fi
local kill_list=$*
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
[ -z "$kill_list" ] && return 0
kill -TERM $kill_list >/dev/null 2>&1
sleep 0.1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
if [ -n "$kill_list" ] ; then
while [ $try -lt $delay ] ; do
sleep 1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
[ -z "$kill_list" ] && break
let try+=1
done
if [ -n "$kill_list" ] ; then
kill -KILL $kill_list >/dev/null 2>&1
sleep 0.1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
fi
fi
[ -n "$kill_list" ] && return 1
return 0
}
# __proc_pids {program} [pidfile]
# Set $pid to pids from /var/run* for {program}. $pid should be declared
# local in the caller.
# Returns LSB exit code for the 'status' action.
__pids_var_run() {
local base=${1##*/}
local pid_file=${2:-/var/run/$base.pid}
local pid_dir=$(/usr/bin/dirname $pid_file > /dev/null)
local binary=$3
[ -d "$pid_dir" -a ! -r "$pid_dir" ] && return 4
pid=
if [ -f "$pid_file" ] ; then
local line p
[ ! -r "$pid_file" ] && return 4 # "user had insufficient privilege"
while : ; do
read line
[ -z "$line" ] && break
for p in $line ; do
if [ -z "${p//[0-9]/}" ] && [ -d "/proc/$p" ] ; then
if [ -n "$binary" ] ; then
local b=$(readlink /proc/$p/exe | sed -e 's/\s*(deleted)$//')
[ "$b" != "$binary" ] && continue
fi
pid="$pid $p"
fi
done
done < "$pid_file"
if [ -n "$pid" ]; then
return 0
fi
return 1 # "Program is dead and /var/run pid file exists"
fi
return 3 # "Program is not running"
}
# Output PIDs of matching processes, found using pidof
__pids_pidof() {
pidof -c -m -o $$ -o $PPID -o %PPID -x "$1" || \
pidof -c -m -o $$ -o $PPID -o %PPID -x "${1##*/}"
}
# A function to start a program.
daemon() {
# Test syntax.
local gotbase= force= nicelevel corelimit
local pid base= user= nice= bg= pid_file=
local cgroup=
nicelevel=0
while [ "$1" != "${1##[-+]}" ]; do
case $1 in
'')
echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1
;;
--check)
base=$2
gotbase="yes"
shift 2
;;
--check=?*)
base=${1#--check=}
gotbase="yes"
shift
;;
--user)
user=$2
shift 2
;;
--user=?*)
user=${1#--user=}
shift
;;
--pidfile)
pid_file=$2
shift 2
;;
--pidfile=?*)
pid_file=${1#--pidfile=}
shift
;;
--force)
force="force"
shift
;;
[-+][0-9]*)
nice="nice -n $1"
shift
;;
*)
echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1
;;
esac
done
# Save basename.
[ -z "$gotbase" ] && base=${1##*/}
# See if it's already running. Look *only* at the pid file.
__pids_var_run "$base" "$pid_file"
[ -n "$pid" -a -z "$force" ] && return
# make sure it doesn't core dump anywhere unless requested
corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"
# if they set NICELEVEL in /etc/sysconfig/foo, honor it
[ -n "${NICELEVEL:-}" ] && nice="nice -n $NICELEVEL"
# if they set CGROUP_DAEMON in /etc/sysconfig/foo, honor it
if [ -n "${CGROUP_DAEMON}" ]; then
if [ ! -x /bin/cgexec ]; then
echo -n "Cgroups not installed"; warning
echo
else
cgroup="/bin/cgexec";
for i in $CGROUP_DAEMON; do
cgroup="$cgroup -g $i";
done
fi
fi
# Echo daemon
[ "${BOOTUP:-}" = "verbose" -a -z "${LSB:-}" ] && echo -n " $base"
# And start it up.
if [ -z "$user" ]; then
$cgroup $nice /bin/bash -c "$corelimit >/dev/null 2>&1 ; $*"
else
$cgroup $nice runuser -s /bin/bash $user -c "$corelimit >/dev/null 2>&1 ; $*"
fi
[ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"
}
# A function to stop a program.
killproc() {
local RC killlevel= base pid pid_file= delay try binary=
RC=0; delay=3; try=0
# Test syntax.
if [ "$#" -eq 0 ]; then
echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
if [ "$1" = "-b" ]; then
if [ -z $pid_file ]; then
echo $"-b option can be used only with -p"
echo $"Usage: killproc -p pidfile -b binary program"
return 1
fi
binary=$2
shift 2
fi
if [ "$1" = "-d" ]; then
delay=$(echo $2 | awk -v RS=' ' -v IGNORECASE=1 '{if($1!~/^[0-9.]+[smhd]?$/) exit 1;d=$1~/s$|^[0-9.]*$/?1:$1~/m$/?60:$1~/h$/?60*60:$1~/d$/?24*60*60:-1;if(d==-1) exit 1;delay+=d*$1} END {printf("%d",delay+0.5)}')
if [ "$?" -eq 1 ]; then
echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
return 1
fi
shift 2
fi
# check for second arg to be kill level
[ -n "${2:-}" ] && killlevel=$2
# Save basename.
base=${1##*/}
# Find pid.
__pids_var_run "$1" "$pid_file" "$binary"
RC=$?
if [ -z "$pid" ]; then
if [ -z "$pid_file" ]; then
pid="$(__pids_pidof "$1")"
else
[ "$RC" = "4" ] && { failure $"$base shutdown" ; return $RC ;}
fi
fi
# Kill it.
if [ -n "$pid" ] ; then
[ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
if [ -z "$killlevel" ] ; then
__kill_pids_term_kill -d $delay $pid
RC=$?
[ "$RC" -eq 0 ] && success $"$base shutdown" || failure $"$base shutdown"
# use specified level only
else
if checkpid $pid; then
kill $killlevel $pid >/dev/null 2>&1
RC=$?
[ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"
elif [ -n "${LSB:-}" ]; then
RC=7 # Program is not running
fi
fi
else
if [ -n "${LSB:-}" -a -n "$killlevel" ]; then
RC=7 # Program is not running
else
failure $"$base shutdown"
RC=0
fi
fi
# Remove pid file if any.
if [ -z "$killlevel" ]; then
rm -f "${pid_file:-/var/run/$base.pid}"
fi
return $RC
}
# A function to find the pid of a program. Looks *only* at the pidfile
pidfileofproc() {
local pid
# Test syntax.
if [ "$#" = 0 ] ; then
echo $"Usage: pidfileofproc {program}"
return 1
fi
__pids_var_run "$1"
[ -n "$pid" ] && echo $pid
return 0
}
# A function to find the pid of a program.
pidofproc() {
local RC pid pid_file=
# Test syntax.
if [ "$#" = 0 ]; then
echo $"Usage: pidofproc [-p pidfile] {program}"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
fail_code=3 # "Program is not running"
# First try "/var/run/*.pid" files
__pids_var_run "$1" "$pid_file"
RC=$?
if [ -n "$pid" ]; then
echo $pid
return 0
fi
[ -n "$pid_file" ] && return $RC
__pids_pidof "$1" || return $RC
}
status() {
local base pid lock_file= pid_file= binary=
# Test syntax.
if [ "$#" = 0 ] ; then
echo $"Usage: status [-p pidfile] {program}"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
if [ "$1" = "-l" ]; then
lock_file=$2
shift 2
fi
if [ "$1" = "-b" ]; then
if [ -z $pid_file ]; then
echo $"-b option can be used only with -p"
echo $"Usage: status -p pidfile -b binary program"
return 1
fi
binary=$2
shift 2
fi
base=${1##*/}
if [ "$_use_systemctl" = "1" ]; then
systemctl status ${0##*/}.service
ret=$?
# LSB daemons that dies abnormally in systemd looks alive in systemd's eyes due to RemainAfterExit=yes
# lets adjust the reality a little bit
if systemctl show -p ActiveState ${0##*/}.service | grep -q '=active$' && \
systemctl show -p SubState ${0##*/}.service | grep -q '=exited$' ; then
ret=3
fi
return $ret
fi
# First try "pidof"
__pids_var_run "$1" "$pid_file" "$binary"
RC=$?
if [ -z "$pid_file" -a -z "$pid" ]; then
pid="$(__pids_pidof "$1")"
fi
if [ -n "$pid" ]; then
echo $"${base} (pid $pid) is running..."
return 0
fi
case "$RC" in
0)
echo $"${base} (pid $pid) is running..."
return 0
;;
1)
echo $"${base} dead but pid file exists"
return 1
;;
4)
echo $"${base} status unknown due to insufficient privileges."
return 4
;;
esac
if [ -z "${lock_file}" ]; then
lock_file=${base}
fi
# See if /var/lock/subsys/${lock_file} exists
if [ -f /var/lock/subsys/${lock_file} ]; then
echo $"${base} dead but subsys locked"
return 2
fi
echo $"${base} is stopped"
return 3
}
echo_success() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
echo -n $" OK "
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 0
}
echo_failure() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo -n $"FAILED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
echo_passed() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo -n $"PASSED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
echo_warning() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo -n $"WARNING"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
# Inform the graphical boot of our current state
update_boot_stage() {
if [ -x /bin/plymouth ]; then
/bin/plymouth --update="$1"
fi
return 0
}
# Log that something succeeded
success() {
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
return 0
}
# Log that something failed
failure() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_failure
[ -x /bin/plymouth ] && /bin/plymouth --details
return $rc
}
# Log that something passed, but may have had errors. Useful for fsck
passed() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_passed
return $rc
}
# Log a warning
warning() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_warning
return $rc
}
# Run some action. Log its output.
action() {
local STRING rc
STRING=$1
echo -n "$STRING "
shift
"$@" && success $"$STRING" || failure $"$STRING"
rc=$?
echo
return $rc
}
# returns OK if $1 contains $2
strstr() {
[ "${1#*$2*}" = "$1" ] && return 1
return 0
}
# Check whether file $1 is a backup or rpm-generated file and should be ignored
is_ignored_file() {
case "$1" in
*~ | *.bak | *.old | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
return 0
;;
esac
return 1
}
# Convert the value ${1} of time unit ${2}-seconds into seconds:
convert2sec() {
local retval=""
case "${2}" in
deci) retval=$(awk "BEGIN {printf \"%.1f\", ${1} / 10}") ;;
centi) retval=$(awk "BEGIN {printf \"%.2f\", ${1} / 100}") ;;
mili) retval=$(awk "BEGIN {printf \"%.3f\", ${1} / 1000}") ;;
micro) retval=$(awk "BEGIN {printf \"%.6f\", ${1} / 1000000}") ;;
nano) retval=$(awk "BEGIN {printf \"%.9f\", ${1} / 1000000000}") ;;
piko) retval=$(awk "BEGIN {printf \"%.12f\", ${1} / 1000000000000}") ;;
esac
echo "${retval}"
}
# Evaluate shvar-style booleans
is_true() {
case "$1" in
[tT] | [yY] | [yY][eE][sS] | [oO][nN] | [tT][rR][uU][eE] | 1)
return 0
;;
esac
return 1
}
# Evaluate shvar-style booleans
is_false() {
case "$1" in
[fF] | [nN] | [nN][oO] | [oO][fF][fF] | [fF][aA][lL][sS][eE] | 0)
return 0
;;
esac
return 1
}
# Apply sysctl settings, including files in /etc/sysctl.d
apply_sysctl() {
if [ -x /lib/systemd/systemd-sysctl ]; then
/lib/systemd/systemd-sysctl
else
for file in /usr/lib/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
[ -f /run/sysctl.d/${file##*/} ] && continue
[ -f /etc/sysctl.d/${file##*/} ] && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
for file in /run/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
[ -f /etc/sysctl.d/${file##*/} ] && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
for file in /etc/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
fi
}
# A sed expression to filter out the files that is_ignored_file recognizes
__sed_discard_ignored_files='/\(~\|\.bak\|\.old\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'
if [ "$_use_systemctl" = "1" ]; then
if [ "x$1" = xstart -o \
"x$1" = xstop -o \
"x$1" = xrestart -o \
"x$1" = xreload -o \
"x$1" = xtry-restart -o \
"x$1" = xforce-reload -o \
"x$1" = xcondrestart ] ; then
systemctl_redirect $0 $1
exit $?
fi
fi
strstr "$(cat /proc/cmdline)" "rc.debug" && set -x
return 0
Rosenblum TV: Video training, virtual workshops, classes, tutorials
RE-INVENTING THE TELEVISION NEWS BUSINESS*
A revolution in video storytelling
Creating entirely new & cost-effective production methods
From the world leaders in video production training and the creators of Character Driven Storytelling™
*and every other business that uses video
WHAT WE DO
Over the past 35 years, we have designed, built or restructured some of the most powerful news and journalism companies in the world.
We replace the traditional TV news ‘crew’ with one highly trained journalist, working alone with nothing but an iPhone.
No more TV news ‘crews’, no editors and no field producers.
This is television news done the way newspaper journalism is done – one reporter with their electronic pad and pencil.
In doing this, we can cut the cost of production by as much as 75% while increasing ratings and audience engagement.
In the place of conventional TV news ‘packages’ – ie, reporter stand up, interview, b-roll, man on the street, we marry great journalism with Netflix and Hollywood storytelling.
It’s a combination that works.
We have taken most of our clients to #1 in their respective markets.
And it’s not just for news. Any company, any profit, any NGO and anyone else who is online needs to tell their story in compelling yet cost-effective video. We can teach you to do that. Either in person or virtually.
EXAMPLES OF WHAT WE CAN TEACH YOUR STAFF TO PRODUCE
ITAY HOD
Itay Hod, MMJ with KPIX/CBS in San Francisco, took the 5-Day Intensive Video Storytelling Bootcamp in 2018.
Because he works alone, with only an iPhone, he was able to embed himself with a homeless family.
Here’s the story he produced in a one-day turn.
KIET DO
Kiet Do, an MMJ with KPIX/CBS in San Francisco, took the 5-Day Intensive Video Storytelling Bootcamp in 2021.
Here is a story he produced, all on his own, with only an iPhone and in a one-day turn.
TAYLOR SCHAUB
Taylor Schaub, an MMJ with Spectrum News 1 in LA, took the 5-Day Intensive Video Storytelling Bootcamp in 2023.
Here is a story he turned in only one day, using only an iPhone. It was the first video story he ever did and it was nominated for an Emmy.
THE BOOTCAMP
How do we convert stations and whole networks to working in this way?
Since 1988, we have run intensive 5-Day Video Storytelling Bootcamps
We have done these all over the world.
These are hands-on bootcamps, and participants learn an entirely new way of creating TV news stories.
-We shoot at a 3:1 ratio or lower, so turnaround times are fast.
-We go directly from camera to timelilne and edit – no written scripts. We work in the medium of pictures and sound.
-We are entirely character-driven.
-We are driven by pictures and real events.
-We are focused almost entirely on ’the viewer experience’.
Since 1988, more than 70,000 journalists around the world have taken our bootcamps, either in person on virtualy.
We have started to work with CBS News, bringing our ideas of character-driven storytelling to one of the most successful and biggest networks in the United States. Since beginning to work with them ratings have climbed and more importantly, audience engagement is through the ceiling.
We started New York Times Television in 1990 and it was the first paper to be brought into the world of TV. It quickly became one of the most successful non-fiction production companies in the United States. The series and documentaries we produced won many awards including multiple Emmys.
We have been working with the BBC since the year 2000 helping to convert their national news network to our visual storytelling technique. Most recently we have trained teams from their sports, documentaries, and comedy divisions to make character-driven stories using only smartphones.
For the past five years we have worked with Spectrum News to introduce and train their journalists on visual, character driven storytelling using smartphones helping to create a different kind of local news for their network of 24-Hour News Stations across the United States.
In 2006, we were approached by the United Nations. Rather than rely on news outlets, it would be much easier to train the field operatives to produce their own stories. We spent two years working with the UN, training more than 100 of their staff in bootcamps in Geneva and Nairobi.
We trained 50 print reporters at the paper to shoot and tell their own stories, in conjunction with their print work. We built a TV newsroom in their existing print newsroom – you could not ask for a better set and they began to live stream their stories in conjunction with their print work.
We spent two years with McGraw Hill, training more than 150 of their staffers, making them completely video literate. McGraw/Hill media properties we transit included Business Week, Aviation Week, (what was the name of the architecture magazine), and JD Power and Associates.
In 1990, we were approached by The Voice of America, the official broadcasting agency for the United States Government. When we met with VOA, they were only a short wave radio broadcaster, but working with them, we took them into television, launching VOA-TV.
British based Oyster Yachts makes some of the finest yachts in the world. Like every other company, they had to find a way to feed the never-ending video demands of social media – sites like Instagram and TikTok. We trained the Oyster staff to tell their own stories, using only iPhones.
We were approached by SEPA, the Scottish Environmental Protection Agency because they had to continually find a way to ‘feed the media beast’. The result was that SEPA was able to tell their own stories, whenever they wanted, and at almost no additional cost.
Michael Rosenblum has been writing about the media since 1988. His work and ideas have appeared in The Guardian, The Huffington Post, Ilkeston Life and many other publications.
He has been blogging regularly for the past 35 years on this subject. Having taught media studies at Columbia University, NYU and now the University of Oxford, he is considered an expert on this subject.
Continue reading this post or look back at previous posts.
