Olympos Andreadis
Olympos Andreadis
Michalis Ioannis Vousdoukas
Michalis Ioannis Vousdoukas







The press about science and not only русский

Monitoring Beach Usage



Research from Australia and Greece

Fan Zhan Physics, Xiao Hua Wang, University of New South Wale, Australia, published a paper entitled "International Journal of Biometeorology", May 2013, 57 (3), 337–347.

Three famous Australian beaches, Surfers Paradise Beach (Gold Coast), Narrunek Beach (Gold Coast) and Bondi Beach (Sydney), were chosen to analyze the preferences of beach visitors under certain weather and ocean conditions. Regression methods are used to determine how these conditions affect the number of visitors to the beaches. Most of the work is devoted to the physics of coastal waters, especially bays and estuaries. The actual numbers of visitors are calculated using webcams and a computer program for counting the number of people on the beach and shallow water provided by CoastalCOMS. This was done three times during the day, at 9:00, 12:00 and 15:00, for several months on each beach.

Weather and ocean conditions are obtained from the Australian Bureau of Meteorology and local governments. Data on weather and ocean behavior — air temperature, relative humidity, cloudiness, wind speed, rainfall, water temperature, and wave height. Weekly and seasonal factors were also considered.

As established in this study, preferable conditions for users of beaches include the following: no precipitation, higher temperatures, wind speeds of less than 30 km / h and low wave heights - up to 1.25 m. For the first time, the data presented by the preferences of beach users for weather conditions and for ocean conditions, show that ocean conditions play an important role in explaining the demand for beach holidays in Australia.

After carefully examining the Australian data, Olympos Andreadis, Michalis Ioannis Vousdoukas, and eight more Greek specialists from the Aegean and Athenian universities performed the "Monitoring beach life using a paradigm" at Paralia Katerinis, Greece. Publication - 11th Panel-Symposium on Oceanography and Fisheries "Water Horizons: Problems and Prospects", Mitilini, Lesbos Island, Greece, May 13-17, 2015, 737-740.
 
The location of the research is the beach opposite the hotel in Paralia Katerini, Greece. The use of the beach is monitored by a monoscopic coastal film set installed on the roof of a coastal residential complex. The monitoring system consists of the Vivotek IP8362 network camera and the Davis Vantage Pro2 Plus weather station, which are managed by a special PC located in the hotel’s data center. In the daytime, the camera records 10 minutes every hour at 5 frames per second at a resolution of 1920x1080. The field of view of the camera covers the coastal beach 70 m wide and 250 m long.

Analyzed the use of the beach and its relationship with weather conditions for a typical sunny summer day and an overcast, rainy day. In just four sunny and four cloudy days, from 10 to 19 hours, in July 2014, 248,818 frames were selected for analysis. It has been established that the majority of beach users are within the first 10-15 m from the coastline, although the beach is 70 m wide. Peak use of the beach is observed around 11 and 17 hours, with a noticeable decline at noon. But it is not observed on rainy or windy days, when beach attendance seems to be controlled by meteorological conditions.

As a result of hard work, it is definitely established - there are much more people on the beach on a sunny day. The morning rain led, oddly enough, to zero use of the beach.


Индивидуальность у золотых рыбок

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Пристально присмотревшись, Уильям Эберхард, увидел причудливую конструкцию, которая напоминала труп членистоногого, покрытого грибами, каково же было удивление биолога, когда чучело размером около 2,5 сантиметров вдруг начало двигаться!
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