Volumen 73 (2020): Edición 4 (December 2020)

Maintaining a stable carbon dioxide content in the process of producing breathing air is important both for the safety of divers performing underwater work and for avoiding financial losses resulting from poor product quality. This paper deals with the implementation of safety measurement systems for online control of the breathing air production process. On the basis of a qualified control system, the capability of the rationalised process was assessed, identifying both its current status and its potential for improvement in terms of eliminating defects caused by excessive carbon dioxide content. For process reasons, the effectiveness of online process monitoring was evaluated against the previously used periodic sample control by means of laboratory methods of instrumental analysis. The analysis was conducted at KTPP AMW¹ for the compressed air supply system of the DGKN - 120² complex.

The author undertakes to systematise and compare various types of losses of the technical and functional properties of equipment related to diving with other areas of human activity in which technical equipment is used. The basis for this is the extensive literature describing, inter alia, the issues of wear and tear of machine parts, their damage, failures, etc. a phenomena occurring in the “life” of virtually every technical object. The specificity of diving techniques makes it a relatively little analysed segment of activity from the perspective of exploitation. Based on the analysis of publications and own materials, the author has reviewed and matched them in terms of similarity of loss of technical and functional properties of various elements of diving technology in relation to the divisions and criteria used in generally understood utilisation.

Cardiovascular diseases such as coronary artery disease, hypertension, and diabetes are some of the most common conditions among the population. An ever-increasing number of recreational divers forces us to consider the impact on unprepared diving patients with cardiovascular diseases, in whom profound changes occur during the dive. People in at-risk groups should have a medical check-up before diving to minimise the risk of possible complications.

The article presents the results of research on the application of a physical exercise programme to improve the underwater orientation of military divers. The research was carried out on a group of 120 soldiers, some of whom (the study group) underwent additional training for 3 months. During the underwater straight-line swimming test in poor visibility conditions, the test group achieved statistically significantly better results than the control group. The test consisted in measuring the angle of deviation of the diver’s route from the given straight line.

The study presents the characteristics of drinking water sources and subsequently performs an analysis of the deviations from the norm in terms of ions of iron, manganese, ammonia, sodium, chlorides as well as other factors affecting the quality of drinking water in the years 2015 - 2017 occurring in individual water intake points in the Kutno district.

There had been recorded a rise in global average temperature by 1.5°C since pre-industrial times. It promotes the spread of diseases carried by vectors and mass occurrence of arthropods. Millipede can carry infectious agents, invade homes and farms, cause skin irritation in case of exposure to their excretions.The aim of the study was to find information about mass appearances of millipedes and identify the places and periods where it happens.

A systematic review of publications available in online scientific databases and the library of the Medical University of Lublin was performed.

As many as 5 reports about mass occurrence of millipede were from Japan, 3 from Brazil, 3 from Australia 2 from Germany and Hungary, and single publications from Romania, Norway, Poland and Madagascar. In Japan the 8-year periodicity of millipede outbreaks was observed. Japan and Australia encounter problems at railway due to these organisms. In other countries they are nuisance to people when they enter their dwellings and pose a burden in farming and gardening therefore mechanical, chemical and biological methods of millipede control are tested. On the other hand millipede help in composting organic waste. In conclusion: global climate change is accompanied by an increase in frequency of mass occurrences of millipedes.