In applications we meet with positive (nonnegative) systems. A system generated by a linear differential equation with a Metzler-matrix is called a nonnegative system. The paper shows the basic dynamic properties of nonnegative continuous-time systems. Considered was the example of an oscillating electrical circuit with a cyclic Metzler-matrix, enabling the correct physical interpretations.
The article presents a proposal, based on an analysis of the software used for displaying parameters of two underwater vehicles, for extending display applications by using the Lab View environment. The purpose of the solution presented is to uniform data displays transmitted from underwater vehicles, used by operators to operate these vehicles as well as consider the possibility for extending the software offered by producers of vehicles by new elements facilitating evaluation of the vehicle’s condition and the effect of the environment on this condition when the vehicle is being operated.
This article is one of the series dedicated to the DiveSMART project conducted to better coordination of international underwater rescue operations in the Baltic Sea. The project DiveSMART Baltic has received Flagship status. The article is the second from planned cycle of articles referring tasks realised in the Naval Academy in frame of DiveSMART project. It describes a potential scenario of an action carried out in order to determine which of the existing resources should be applied during underwater search and rescue operations. This subject is connected to the work package two ‘Determine what resources should be in the database’ of the DiveSMART project: Identify different platforms and vessels that the modules could be used on, the adjustment of the transport and rescue modules to these platforms and vessels.
STRADAR project is dedicated to streaming real-time data in a distributed dispatcher and teleinformation system of the Border Guard. The Events Visualization Post is a software designed for simultaneous visualization of data of different types in BG headquarters. The software allows the operator to visualize files, images, SMS, SDS, video, audio, and current or archival data on naval situation on digital maps. All the visualized data can be synchronized in time.
The article concerns the use of computer support systems for technical support in the difficult conditions. The term difficult conditions should be understood as such conditions, in which an operation is carried out in a specific location, impeding or preventing the use of the computer. In such cases, computers integrated with operators’ working clothes (wearable computers) should be used, with which the communication takes place using voice. This article shows the attempt to resolve the problem of voice communications in a portable system to handle aircraft M-28.
This paper presents mathematical interdependences in converting geodetic coordinates into flat rectangular coordinates and inverse transformation recommended in the Ordinance by Prime Minister on the State System of Spatial References. It especially presents formulas contained in works by M. Hooijberg (1997) Practical Geodesy and R. Kadaj (2001) Projection Formulas and Parameters of Coordinate Systems. G-1.10. In order to illustrate uses of the presented formulas relevant calculation examples based on the reference ellipsoids WGS 84 and GRS 80 are included.
This article presents an analysis of energy demand by a group of portable military use appliances. This analysis was used by the author to offer an solution aimed at reducing the weight of the power supply system. This solution is based on energy profiles which were derived from the analyses and measurements, and on applying appropriately modified hybrid supply sources. Catalogue data are often used in support of an analysis of performance of electronic appliances. For a user, documents prepared by a manufacturer are the main source of information concerned with the amount and quality of electric energy sources required for the appliance to work properly. Investigations carried out in real conditions often verify this data, which provides a base for seeking alternative solutions in the course of designing new sources of power, e.g. such as the ones proposed in the article.
The material presents an analysis of the impact that the parameters of air hyperbaric exposure have on the time remaining to the beginning of the first ventilation, as calculated with two mathematical models. The research has been conducted in the form of simulations that take into account standard parameters of exposure. Differences between the analysed models have been indicated, and the influence of the changes of particular input values in the analysed models on the output values has been defined.
The article presents overall energy research conducted by the Polish Naval Academy for the purpose of operational diagnostics of the naval gas turbines operated by the Polish Navy. In this article are presented the purpose and methodology of research, identification of the object of research and test equipment used for research. The research results will be presented in another article Analysis operational parameters of the naval gas turbines. As far as the Polish Navy vessels are concerned, there were four types of the naval gas turbines operated in the years 1983-2003: DE 59, DR 76, DR 77 and LM 2500. Currently, since 2013, there are four LM 2500 engines in service, which drive ‘Oliver Hazard Perry’ type missile frigates. In the near term, an another LM 2500 engine along with a 661M type patrol boat will become operational. Within the framework of energy research, the engine starting process, running on idle and in the whole range of variation of load as well as the process of stopping the engines will be placed under systematic operational surveillance.
The Sweedish project codenamed DykSMART was carried out in 2013-2015. The results of this project created the base for for international project #R024 Diving with State Maritime Resources in the Baltic DiveSMART-Baltic of Interreg Baltic Sea Region launched in 2016. The Interreg Baltic Sea Region Programme 2014-2020 supports the integrated territorial development and cooperation for a more innovative, better accessible and sustainable Baltic Sea region. Partners from the countries around the Baltic Sea work together in transnational projects on common key challenges and opportunities. DiveSMART project is dedicated to improved coordination concerning the organizations with emergency divers, in order to be able to handle an international emergency situation: - to be aware of which diving competences are available, and also relevant diving equipment; - common international exercises; - knowledge of education and definitions of various levels of competence; - research & development. The project DiveSMART Baltic has received Flagship status. The article is the first in the planned cycle of articles referring to the tasks realised in the Naval Academy within the framework of DiveSMART project. This article presents a review of pollutants of the hyperbaric breathing agent in connection with their toxic action. This subject is linked to the work package four of the DiveSMART project Risk reduction - develop and enhance methods for life support systems of distressed persons in both physical and psychological areas.