scholarly journals Radon Gas Profiles and Exposure Estimates in the Perama Cave, Greece

2020 ◽  
Vol 13 ◽  
pp. 120
Author(s):  
C. A. Papachristodoulou ◽  
K. G. Ioannides ◽  
K. C. Stamoulis ◽  
D. L. Patiris ◽  
S. B. Pavlides
Keyword(s):  
Short Duration ◽  
Remedial Measures ◽  
Radon Daughters ◽  
Effective Doses ◽  
Guided Tour ◽  
Atmospheric Radon ◽  
Cr 39 Detectors ◽  
North Western ◽  
Action Levels ◽  
Western Greece

An investigation of atmospheric radon levels in the Perama Cave, North-western Greece, has been carried out using CR-39 detectors. The detectors were placed at various locations along the guided cave pathway and exposed during different sampling periods. Mean concentrations amounting to 925±418 and 1311±352 Bq m-3 were recorded in the summer and winter months, respectively. The quantification of effective doses from radon daughters' inhalation was important, as the Perama Cave is one of the most popular in Greece, attracting more than 85,000 tourists per year. Due to the short duration of the guided tour along the cave, exposure of tourists was found to be insignificant, lying below 5.1 μSv per visit. Permanent cave guides receive doses ranging from 4.2 to 5.9 mSv y-1. Considering the ICRP-65 recommendation that action levels in dwellings and workplaces should be set between 3 and 10 mSv y-1 untertaking remedial measures to reduce the exposure of cave staff may be appropriate.

scholarly journals A survey of 222Rn concentrations in dwellings of the town of Metsovo in North-western Greece

2019 ◽  
Vol 11 ◽  
Author(s):  
K. G. Ioannides ◽  
K. C. Stamoulis ◽  
C. A. Papachristodoulou
Keyword(s):  
Gamma Spectroscopy ◽  
Indoor Radon ◽  
Indoor Radon Concentration ◽  
Radium Content ◽  
The Town ◽  
Radon Survey ◽  
Cr 39 Detectors ◽  
North Western ◽  
Western Greece ◽  
Concentration Levels

A radon survey has been carried out of indoor radon concentrations in dwellings ocated in the town of Metsovo, in north-western Greece. To measure indoor radon ioncentrations, CR-39 detectors were installed in randomly selected houses and were exposed :or about 3 months, during summer and winter. Also gamma spectroscopy measurements of he soil's radium content were performed. The indoor radon concentration levels varied from [7.6 to 750.4 Bq m-3, while the radium concentration of soil varied from 4.9 to 97.1 Bq m"3. Seasonal variation of the radon levels and the influence of house features and sou are liscussed.

scholarly journals Earthquake Source Investigation of the Kanallaki, March 2020 Sequence (North-Western Greece) Based on Seismic and Geodetic Data

2021 ◽  
Vol 13 (9) ◽  
pp. 1752
Author(s):  
Nikos Svigkas ◽  
Anastasia Kiratzi ◽  
Andrea Antonioli ◽  
Simone Atzori ◽  
Cristiano Tolomei ◽  
...  
Keyword(s):  
Surface Deformation ◽  
Detailed Knowledge ◽  
Eurasian Plate ◽  
Distribution Models ◽  
Active Deformation ◽  
Strong Earthquakes ◽  
Seismic Waveforms ◽  
Northwestern Greece ◽  
North Western ◽  
Western Greece

The active collision of the Apulian continental lithosphere with the Eurasian plate characterizes the tectonics of the Epirus region in northwestern Greece, invoking crustal shortening. Epirus has not experienced any strong earthquakes during the instrumental era and thus there is no detailed knowledge of the way the active deformation is being expressed. In March 2020, a moderate size (Mw 5.8) earthquake sequence occurred close to the Kanallaki village in Epirus. The mainshock and major aftershock focal mechanisms are compatible with reverse faulting, on NNW-ESE trending nodal planes. We measure the coseismic surface deformation using radar interferometry and investigate the possible fault geometries based on seismic waveforms and InSAR data. Slip distribution models provide good fits to both nodal planes and cannot resolve the fault plane ambiguity. The results indicate two slip episodes for a N337° plane dipping 37° to the east and a single slip patch for a N137° plane dipping 43° to 55° to the west. Even though the area of the sequence is very close to the triple junction of western Greece, the Kanallaki 2020 activity itself seems to be distinct from it, in terms of the acting stresses.

Prevalence of Staphylococcus aureus and of methicillin-resistant S. aureus (MRSA) along the production chain of dairy products in north-western Greece

2018 ◽  
Vol 69 ◽  
pp. 43-50 ◽  
Author(s):  
Panagiotis Papadopoulos ◽  
Theofilos Papadopoulos ◽  
Apostolos S. Angelidis ◽  
Evridiki Boukouvala ◽  
Antonios Zdragas ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Dairy Products ◽  
Production Chain ◽  
Methicillin Resistant ◽  
North Western ◽  
Western Greece

scholarly journals Weather forecast in north-western Greece: RISKMED warnings and verification of MM5 model

2010 ◽  
Vol 10 (2) ◽  
pp. 383-394 ◽  
Author(s):  
A. Bartzokas ◽  
V. Kotroni ◽  
K. Lagouvardos ◽  
C. J. Lolis ◽  
A. Gkikas ◽  
...  
Keyword(s):  
Air Temperature ◽  
Weather Forecasting ◽  
Precipitation Amount ◽  
Warning System ◽  
Weather Forecast ◽  
Early Morning ◽  
Meteorological Model ◽  
Adverse Weather ◽  
North Western ◽  
Western Greece

Abstract. The meteorological model MM5 is applied operationally for the area of north-western Greece for one-year period (1 June 2007–31 May 2008). The model output is used for daily weather forecasting over the area. An early warning system is developed, by dividing the study area in 16 sub-regions and defining specific thresholds for issuing alerts for adverse weather phenomena. The verification of the model is carried out by comparing the model results with observations from three automatic meteorological stations. For air temperature and wind speed, correlation coefficients and biases are calculated, revealing that there is a significant overestimation of the early morning air temperature. For precipitation amount, yes/no contingency tables are constructed for 4 specific thresholds and some categorical statistics are applied, showing that the prediction of precipitation in the area under study is generally satisfactory. Finally, the thunderstorm warnings issued by the system are verified against the observed lightning activity.

Seasonal Variation of Radon Daughters Concentrations in the Atmosphere and in Precipitation at the Japanese Coast of the Sea of Japan

1988 ◽  
Vol 24 (1-4) ◽  
pp. 93-95 ◽  
Author(s):  
T. Nishikawa ◽  
S. Okabe ◽  
M. Aoki
Keyword(s):  
Seasonal Variation ◽  
Sea Of Japan ◽  
Coastal Region ◽  
The Other ◽  
The Sea Of Japan ◽  
Heavy Snowfall ◽  
Air Masses ◽  
Japanese Coast ◽  
Radon Daughters ◽  
Atmospheric Radon

Abstract The atmospheric radon daughters concentration at Fukui in the Japanese coastal region of the Sea of Japan shows a seasonal variation whose high values appear in summer and low values in winter. On the other hand, the radon daughters concentration in precipitation at Fukui and that in the maritime atmosphere over the Sea of Japan are high in winter and low in summer. It is concluded from these phenomena that the greater part of the continental radon and its daughters are transported by seasonal winds from Siberia and China to Japan across the Sea of Japan in winter. However, when the air masses approach the shore, the cumulonimbus grows and the heavy snowfall scavenges out the radon daughters from the air masses in large quantities at the Japanese coastal region of the Sea of Japan.

Assessment of tritium levels in rivers and precipitation in north-western Greece before the ITER operation

2011 ◽  
Vol 86 (2-3) ◽  
pp. 206-213 ◽  
Author(s):  
K.C. Stamoulis ◽  
D. Karamanis ◽  
K.G. Ioannides
Keyword(s):  
North Western ◽  
Western Greece

scholarly journals Detection of Cryptosporidium and Giardia in foods of plant origin in North-Western Greece

2020 ◽  
Vol 18 (4) ◽  
pp. 574-578
Author(s):  
Hercules Sakkas ◽  
Vangelis Economou ◽  
Petros Bozidis ◽  
Panagiota Gousia ◽  
Chrissanthy Papadopoulou ◽  
...  
Keyword(s):  
Health Hazard ◽  
Diarrhoeal Disease ◽  
Diagnostic Methods ◽  
Plant Origin ◽  
Potential Health ◽  
Worldwide Distribution ◽  
Fresh Vegetables ◽  
Vegetables And Fruits ◽  
North Western ◽  
Western Greece

Abstract Giardia and Cryptosporidium are recognized as leading causes of waterborne and foodborne diarrhoeal disease with worldwide distribution. The study aimed to determine the protozoan contamination of various foods of plant origin. A total of 72 samples from 27 different varieties of fresh vegetables and fruits were collected from supermarkets and open markets in North-Western Greece and were examined using conventional diagnostic methods. Two out of 72 (2.8%) samples were found positive for Cryptosporidium oocysts, while no sample was found to be positive for Giardia cysts. The results show the presence of protozoan contamination in foods of plant origin, which may constitute a potential health hazard.

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