Δυμόκαστρο Θεσπρωτίας – ζώα και φυσίγγια στον αρχαιολογικό χώρο

Τις προάλλες επισκέφθηκα και ακόμη μία φορά το Δυμόκαστρο Θεσπρωτίας. Μία αρχαία καστροπολιτεία, ταυτίζεται με την αρχαία Ελίνα, η οποία βρίσκεται σε έναν πανέμορφο λόβο πάνω από τη παραλία Καραβοστάσι, δίπλα στον Αρίλλα. Σώζονται αρκετά ευρήματα και η θέα προς το Ιόνιο είναι μαγευτική, βλέποντας από τη Λευκάδα μέχρι και τη Κέρκυρα.

Προς απογοήτευση μου όμως, παρά την προστασία με φράχτες κλπ., αντίκρυσα την είσοδο οικόσιτων βοειδών στον αρχαιολογικό χώρο καθώς επίσης και αρκετά φυσίγγια.  Ανέφερα (με φωτογραφικά στοιχεία) το συγκεκριμένο περιστατικό στην ΛΒ΄ ΕΠΚΑ η οποία είναι υπεύθυνη για τον συγκεκριμένο χώρο και έλαβα τη παρακάτω απάντηση από τον αναπληρωτή προϊστάμενο:

“ΘΕΜΑ: «Παρουσία ζώων στον αρχαιολογικό χώρο Δυμοκάστρου»

ΣΧΕΤ.: (α). Το από 23.01.2012 ηλεκτρονικό μήνυμά σας.

 Σε απάντηση του ανωτέρω σχετικού ηλεκτρονικού σας μηνύματος σχετικά με την παρουσία ζώων και κυνηγών στον αρχαιολογικό χώρο του Δυμοκάστρου Θεσπρωτίας, σας γνωρίζουμε ότι η Υπηρεσία μας έχει το τελευταίο χρονικό διάστημα επανειλημμένα ενημερώσει τις αρμόδιες αρχές (αστυνομικό τμήμα Πέρδικας και τους ιδιοκτήτες οικόσιτων κοπαδιών ζώων) για την ανάγκη απομάκρυνσής τους από τον αρχαιολογικό χώρο και για την τακτική διέλευση αστυνομικών αποσπασμάτων από την ευρύτερη περιοχή, ώστε να αποφευχθούν οι παραβιάσεις εντός του χώρου, αλλά και τυχόν κρούσματα λαθρανασκαφών.

Ευελπιστώντας ότι σχετικά θέματα θα αντιμετωπιστούν μελλοντικά, σας ευχαριστούμε θερμά για το ενδιαφέρον σας και παραμένουμε στη διάθεσή σας για οποιαδήποτε περαιτέρω πληροφορία.“

Ακόμη και εάν ληφθούν μέτρα προστασίας, η νοοτροπία των συγκεκριμένων κατοίκων της γύρω, προφανώς, περιοχής, πρόκειτε ν’αλλάξει; Των παιδιών τους;

ΉΠΕΙΡΟΣ – Τόπος & Μορφές

HPC-Europa2 Virtual Cluster liveDVD – milestone6 (final release)

The JRA2 team is proud to announce the release of HPC-Europa2 live DVD milestone 6. You can download milestone 6 ISO image (compressed with size 1.7 GB) from the below links:

CINECA (Italy) – http://www.hpc-europa.eu/?q=node/142
EPCC (Scotland) – http://hpce2jra2.epcc.ed.ac.uk/milestone6.iso.gz
HLRS (Germany) – https://fs.hlrs.de/projects/live-ptd/iso/milestone6.iso.gz

Release Note for Milestone 6
============================
The Virtual Cluster liveDVD:
* provides tools and libraries that are installed and used at the partner sites.
* emaulates the environment of the platforms available at HPC-Europa centers.
* allows hands-on building of a virtual cluster.

The liveDVD contains training and dissemination material published by the
HPC-Europa2 project, including material from the partner centers such as slides,
video tutorials and example code. Optional access to a source code repository enables
the migration of code and data from the Virtual Cluster to the user account created
on the HPC-Europa machines.

The liveDVD is based on SliTaz GNU/Linux, a free operating system, working completely
in RAM and booting from a removable media. The file size of the SliTaz GNU/Linux
3.0 ISO image is 29 MB. Hence, it leaves plenty of space for adding tools, libraries
and training material into this liveDVD. The SliTaz system is quick, responsive, and clean.
A lightweight and elegant desktop is included as well in the 29MB ISO image.

The milestone 6 ISO image has roughly the size of 3.8 GB including several tools
and libraries, as well as training material. Moreover, it contains a documentation
of how to build a virtual cluster using VirtualBox, and HPC-Europa2's Science and
Supercomputing in Europe research highlights for 2009 and 2010. Finally, this milestone
release addresses several bug fixes, such as firefox with flash support and
build scripts for Torque.

Since the previous release (milestone 5), existing packages have been updated, such as:
* MPICH2 to version 1.4.1p1
* Firefox to version 9.0.1 with flash support.
* Paraver to support the updated version of MPICH2.

In addition, this release has added several new packages:
* lava-1.0.6: Platform Lava - an open source version of Platform Load Sharing Facility (LSF).
* info (texinfo-4.13a) and man pages (man-db-2.6.0.2 and man-pages-3.35) for Linux documentation.
* Abiword and Gnumeric for office word documents and spreadsheets.
* Compiler wrappers (based on gcc and gfortran) to emulate Intel, IBM and NEC SX compilers.

You can download milestone 6 ISO image (compressed - size 1.7 GB) from the below link:
    http://www.hpc-europa.eu/?q=node/142

System Requirements
===================
* A laptop or computing with a DVD drive.
* Intel or AMD processor with a hardware virtualization support when using KVM
  and libvirt. Otherwise, this liveDVD can be run under VirtualBox or VMware or similar.

Known Issues
============
* PGI compilers require a license file in order to work (not included in this milestone).
* Totalview requires a license file in order to work (not included in this milestone).
  For requiring a demo license visit:
  http://www.roguewave.com/products/totalview-family/totalview.aspx
* On a MacBook Pro laptop, the mousepad does not work. Need to use an USB mouse
* Resizing video screen on VLC causes an unexpected exit of the program.
* VLC has no sound for viewing mkv videos.
* VLC cannot stream files or view incoming streams.

Acknowledgement
===============
This work was carried out under the HPC-EUROPA2 project (project number: 228398),
with the support of the European Community - Research Infrastructure Action of the FP7.

Shell script for NITROX calculations

The following script was developed for providing quick calculations over NITROX diving. It provides an interactive menu for the following calculations:

1 – Maximum Operational Depth (MOD)
2 – Operational Depth (OD)
3 – Best mix
4 – Equivelant Air Depth (EAD)
5 – Nitrogen percentage compared to Air
6 – Oxygen partial pressure (PO2)
7 – Central Nervous Systems Toxicity (CNS)
8 – Absolute pressure

############################################################################
# Copyright (C) 2011  Panagiotis Kritikakos <panoskrt@gmail.com>           #
#                                                                          #
#    This program is free software: you can redistribute it and/or modify  #
#    it under the terms of the GNU General Public License as published by  #
#    the Free Software Foundation, either version 3 of the License, or     #
#    (at your option) any later version.                                   #
#                                                                          #
#    This program is distributed in the hope that it will be useful,       #
#    but WITHOUT ANY WARRANTY; without even the implied warranty of        #
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         #
#    GNU General Public License for more details.                          #
#                                                                          #
#    You should have received a copy of the GNU General Public License     #
#    along with this program.  If not, see <http://www.gnu.org/licenses/>. #
############################################################################
#!/bin/bash

disclaimer()
{
echo "
=======================================================
Every individual diver is responsible for planning
and conducting dives using SCUBA equipment up to the
trained and certified qualification he or she holds.

The creator of this program does not have any
responsibility for symptoms of Decompressions Sickness
when the suggested values of this program are used
for conducting a dive.
========================================================
"
}
mod(){
   echo -n "NITROX mix: "; read mix
   MOD=`echo "scale=2; (((1.6/$mix)*10)*100)-10" | bc`
   echo " MOD for $mix NITROX: $MOD"
}

od(){
   echo -n "NITROX mix: "; read mix
   OD=`echo "scale=3; (((1.4/$mix)*10)*100)-10" | bc`
   echo " OD for $mix NITROX: $OD"
}

bestmix(){
   echo -n " Depth: "; read depth
   BESTMIX4=`echo "scale=2; 1.4/(($depth/10)+1)" | bc`
   BESTMIX6=`echo "scale=2; 1.6/(($depth/10)+1)" | bc`
   echo " Best mix for 1.4 PO2: $BESTMIX4"
   echo " Best mix for 1.6 PO2: $BESTMIX6"
}

ead(){
   echo -n " Depth: "; read depth
   echo -n " NITROX: "; read nitrox
   EAD=`echo "scale=2; ((((1-($nitrox/100))*4)/0.79)-1)*10" | bc`
   echo " EAD for $depth MSW and NITROX $nitrox: $EAD"
}

compare(){
   echo -n " NITROX: "; read nitrox
   EQU=`echo "scale=2; 100-(((1-($nitrox/100))/0.79)*100)" | bc`
   echo " ${EQU}% less nitrogen"
}

po2(){
   echo -n " Depth: "; read depth
   echo -n " NITROX: "; read nitrox
   PO2=`echo "scale=2; (($depth+10)/10)*($nitrox/100)" | bc`
   echo " PO2 at $depth MSW for NITROX $nitrox: $PO2 ATM"
}

cns(){
   echo -n " PO2 [1.4, 1.5, 1.6]: "; read po2
   echo -n " Duration: "; read duration
   if [ "$po2" == "1.4" ]; then
      CNS=`echo "scale=2; ($duration/150)*100" | bc`
   elif [ "$po2" == "1.5" ]; then
      CNS=`echo "scale=2; ($duration/120)*100" | bc`
   elif [ "$po2" == "1.6" ]; then
      CNS=`echo "scale=2; ($duration/45)*100" | bc`
   else
      echo " Choose between 1.4, 1.5 and 1.6 PO2"
      exit 1
   fi
   echo " CNS for $duration minutes and $po2 PO2: ${CNS}%"
}

absolute(){
   echo -n " Depth: "; read depth
   ABS=`echo "scale=2; (($depth/10)+1)" | bc`
   echo " Absolute pressure at depth of $depth MSW: $ABS ATM"
}

echo " 1 - Maximum Operational Depth (MOD)"
echo " 2 - Operational Depth (OD)"
echo " 3 - Best mix"
echo " 4 - Equivelant Air Depth (EAD)"
echo " 5 - Nitrogen percentage compared to Air"
echo " 6 - Oxygen partial pressure (PO2)"
echo " 7 - Central Nervous Systems Toxicity (CNS)"
echo " 8 - Absolute pressure"
echo
echo -n " Function: "; read option
disclaimer
case "$option" in
	1)
	  mod
	  ;;
	2)
	  od
	  ;;
	3)
	  bestmix
	  ;;
	4)
	  ead
	  ;;
	5)
	  compare
	  ;;
	6)
	  po2
	  ;;
	7)
	  cns
	  ;;
	8)
	  absolute
	  ;;
	*)
	  echo " Please choose a valid option from the menu"
	  exit 1
esac

HPC-Europa2 Virtual Cluster liveDVD – milestone 5

The fifth release of the HPC-Europa2 Virtual Cluster liveDVD is available (milestone 5) for download:

CINCENA (ITA) - http://www.hpc-europa.eu/files/iso/milestone5.iso.gz
EPCC (UK) - http://hpce2jra2.epcc.ed.ac.uk/milestone5.iso.gz

Release Note for Milestone 5
============================
The Virtual Cluster liveDVD:
* provides tools and libraries that are installed and used at the partner sites.
* emulates the environment of the platforms available at HPC-Europa centers.
* allows hands-on building of a virtual cluster.

The liveDVD contains training and dissemination material published by the HPC-Europa2 project, including material from the partner centers such as slides, video tutorials and example code. Optional access to a source code repository enables the migration of code and data from the Virtual Cluster to the user account created on the HPC-Europa machines.

The liveDVD is based on SliTaz GNU/Linux, a free operating system, working completely in RAM and booting from a removable media. The file size of the SliTaz GNU/Linux 3.0 ISO image is 29 MB. Hence, it leaves plenty of space for adding tools, libraries and training material into this liveDVD. The SliTaz system is quick, responsive, and clean. A lightweight and elegant desktop is included as well in the 29MB ISO image.

The milestone 5 ISO images has roughly the size of 3.7 GB including several tools and libraries, as well as training material.

Since the previous release (milestone 4), existing packages have been updated, such as:

* Open MPI to version 1.5.4
* Midori with flash support
* Firefox to version 7.0.1

In addition, this release has added a new package to support EVO (http://evo.caltech.edu/)

System Requirements
===================
* A laptop or computing with a DVD drive.
* Intel or AMD processor with a hardware virtualization support when using KVM and libvirt. Otherwise, this liveDVD can be run under VirtualBox or VMware or similar.

Known Issues
============
* Totalview requires a license file, which is no included, in order to work.
For requiring a demo license visit:

http://www.roguewave.com/products/totalview-family/totalview.aspx

* On a MacBook Pro laptop, the mousepad does not work. Need to use an USB mouse
* Resizing video screen on VLC causes an unexpected exit of the program.
* VLC has no sound for viewing mkv videos.
* VLC cannot stream files or view incoming streams.
* Flash cannot be viewed under Firefox. Use Midori instead.

Acknowledgement
===============
This work was carried out under the HPC-EUROPA2 project (project number: 228398),
with the support of the European Community – Research Infrastructure Action of the FP7.

Altitude diving depth and NITROX calculations

For several reasons I’ve found myself diving (with SCUBA) in inland lakes on altitude. Due to the lower atmospheric pressure, altitude diving requires different depth calculations. There are diving tables and computer software that help divers to plan a safe dive. Although, I’ve though of making my “quick and dirty” script for calculating the theoretical ocean depth of an altitude dive, the depth of the safety stop at altitude as well as the best NITROX mix at the given altitude for PO2 of 1.2, 1.4 and 1.6.

The scripts accepts only two parameters: the altitude and the depth. For instance, for a dive at 1350m altitude and 30m depth:

 ./calcDepth.sh 1350 30
=======================================================
Every individual diver is responsible for planning
and conducting dives using SCUBA equipment up to the
trained and certified qualification he or she holds.

The creator of this program does not have any
responsibility for symptoms of Decompressions Sickness
when the suggested values of this program are used
for conducting a dive.
========================================================

Altitude: 	1350 m
Depth: 		30 mfw
Pressure: 	.86 atm
TOD: 		33.65900 msw
Safety Stop: 	4.45 mfw

Best NITROX mix with 1.2 PO2: 27.00
Best NITROX mix with 1.4 PO2: 32.00
Best NITROX mix with 1.6 PO2: 36.00

###########################################################################
# Copyright (C) 2011  Panagiotis Kritikakos <panoskrt@gmail.com>           #
#                                                                          #
#    This program is free software: you can redistribute it and/or modify  #
#    it under the terms of the GNU General Public License as published by  #
#    the Free Software Foundation, either version 3 of the License, or     #
#    (at your option) any later version.                                   #
#                                                                          #
#    This program is distributed in the hope that it will be useful,       #
#    but WITHOUT ANY WARRANTY; without even the implied warranty of        #
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         #
#    GNU General Public License for more details.                          #
#                                                                          #
#    You should have received a copy of the GNU General Public License     #
#    along with this program.  If not, see <http://www.gnu.org/licenses/>. #
############################################################################
#!/bin/bash
MSW=10.0584
MFW=10.3632
SSDSW=5
ALT=$1
Da=$2

disclaimer()
{
echo "
=======================================================
Every individual diver is responsible for planning
and conducting dives using SCUBA equipment up to the
trained and certified qualification he or she holds.

The creator of this program does not have any
responsibility for symptoms of Decompressions Sickness
when the suggested values of this program are used
for conducting a dive.
========================================================
"
}

if [ -z $ALT ] || [ -z $Da ]; then
  echo " Specify altitude and depth: ./calcDepth.sh 1350 24"
  exit 1
else
  clear
  Pa=`echo "100-(0.01*$ALT)" | bc`

  TOD=`echo "scale=5; ($Da*(1/$Pa)*($MSW/$MFW))*100" | bc`
  SSDA=`echo "scale=2; ($SSDSW*($Pa/1)*($MFW/$MSW))/100" | bc`

  PAatm=`echo "scale=2; $Pa/100" | bc`

  N1=`echo "scale=2; 100*(1.2/(($TOD/10)+1))" | bc`
  N2=`echo "scale=2; 100*(1.4/(($TOD/10)+1))" | bc`
  N3=`echo "scale=2; 100*(1.6/(($TOD/10)+1))" | bc`

  echo
  disclaimer
  echo

  printf "Altitude: \t$ALT m\n"
  printf "Depth: \t\t$Da mfw\n"
  printf "Pressure: \t$PAatm atm\n"
  printf "TOD: \t\t$TOD msw\n"
  printf "Safety Stop: \t$SSDA mfw\n\n"
  printf "Best NITROX mix with 1.2 PO2: $N1\n"
  printf "Best NITROX mix with 1.4 PO2: $N2\n"
  printf "Best NITROX mix with 1.6 PO2: $N3\n\n"
  exit 0
fi

HPC-Europa2 Virtual Cluster liveDVD – milestone 4

The fourth release of the HPC-Europa2 Virtual Cluster liveDVD is available (milestone 4) for download:

CINCENA (ITA) - http://www.hpc-europa.eu/files/iso/milestone4.iso.gz
EPCC (UK) - http://hpce2jra2.epcc.ed.ac.uk/milestone4.iso.gz
HLRS (GER) - https://fs.hlrs.de/projects/live-ptd/milestone4.iso

Release Notes for milestone 4
============================
The Virtual Cluster liveDVD:
* provides tools and libraries that are installed and used at the partner sites.
* emulates the environment of the platforms available at HPC-Europa centers.
* allows hands-on building of a virtual cluster.

The liveDVD contains training and dissemination material published by the HPC-Europa2 project, including material from the partner centers such as slides, video tutorials and example code. Optional access to a source code repository enables the migration of code and data from the Virtual Cluster to the user account created on the HPC-Europa machines.

The liveDVD is based on SliTaz GNU/Linux, a free operating system, working completely in RAM and booting from a removable media. The file size of the SliTaz GNU/Linux 3.0 ISO image is 29 MB. Hence, it leaves plenty of space for adding tools, libraries and training material into this liveDVD. The SliTaz system is quick, responsive, and clean. A lightweight and elegant desktop is included as well in the 29MB ISO image.

The milestone4 ISO images has roughly the size of 3.4GB including several tools and libraries, as well as training material.

Since the previous release (milestone3), existing packages have been updated. Moreover, new packages have been added, such as:

* Emacs version 23.1
* Firefox version 6.0.2
* covise-6.5.0: A collaborative visualization and simulation environment
* imagemagick-6.5.5: Imaging tools.
* libvirt-0.9.4: The virtualization API
* marmot-2.4.0: A tool for analysing and checking MPI applications
* modules-3.2.8: The modules environment.
* opennebula-2.2.1: A virtualization manager
* qcachegrind-0.6: A profile data visualization under Qt similar to KCachegrind.
* torque-3.0.0: Provides the binaries for the Torque Batch System.
* tcl-8.5.9, tcl-8.4: TCL scripting packages, dependencies for the modules environment.
* VampirTrace-5.11: Generates an OTF trace file, which can be analyzed and visualized  by the visualisation tool Vampir.
* MPI and OpenMP training material has been added.
* Tutorial has been provided on how to set up the Virtual Cluster.

System Requirements
===================
* A laptop or computing with a DVD drive.
* Intel or AMD processor with a hardware virtualization support.

Known Issues
============
* Totalview requires a license file, which is no included, in order to work. For requiring a demo license visit: http://www.roguewave.com/products/totalview-family/totalview.aspx
* On a MacBook Pro laptop, the mousepad does not work. Need to use an USB mouse
* Resizing video screen on VLC causes an unexpected exit of the program.
* VLC has no sound for viewing mkv videos.
* VLC cannot stream files or view incoming streams.

Acknowledgement
===============
This work was carried out under the HPC-EUROPA2 project (project number: 228398), with the support of the European Community – Research Infrastructure Action of the FP7.

Νέο εργαλείο

Μετά από μερικά χρόνια χρειάστηκε να παρατήσω τον Γίγαντα (Giant Rock MTB) και να επιστρέψω σε μια σταθερή αξία της ελληνικής αγοράς. Ο λόγος για το νέο IDEAL PRORIDER, αν και μοντέλο του 2010, που μόλις μερικών ημερών φένεται να περνάει τις πρώτες δοκιμασίες επιτυχώς!

Ethernet device rename

I have been looking recently to find a way of creating a bridge interface on SliTaz in order to get KVM/libVirt working with the expected br0 interface. Unfortunately, the network configuration files of SliTaz do not provide any information, neither the documentation. A post on the forum didn’t get any replies either. Rather than trying figuring how a proper bridge interface would work on SliTaz, I thought of renaming eth0 to br0, as the later would be expected by KVM/libVirt. As far as I know the following process would need to be followed for other distros as well as there is no specific way of renaming an interface other than using udev rules.

On SliTaz, the required udev rule is defined /etc/udev/rules.d/70-persistent-net.rules. The default entry looks like the following (where Xs the MAC address):

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="XX:XX:XX:XX:XX:XX",
ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

The generated rule matches the eth0 interface with the specific network card. The required change is the renaming of the NAME field to br0. If the targeted system is a virtual machine with changeable MAC address, or most likely a live distro like in my case, the ATTR field, that specifies the MAC address, would need to be changed as well. Changing it to 0* would work and on the next boot the device should be renamed. The final udev rule:

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="0*",
ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="br0"

There is one more addition to do on SliTaz and that is to rename the default ethernet device in /etc/network.conf from eth0 to br0. That would allow higher level applications and scripts to look for br0 rather the non-existant eth0.

Λίμνες στην Ήπειρο

Άλλη μια προσπάθεια βασικής χαρτογράφησης, αυτή τη φορά για τις λίμνες την Ηπείρου.

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