Search results

The purpose of this paper is to present computer simulations of ship’s magnetic signatures using a new thin plate boundary condition implemented in the Opera 3D 18R2 programme. This paper aims to check the magnetic signatures’ numerical calculations precision of objects using the thin plate boundary conditions and analysis of the magnetic signature of ship with a degaussing system and with and without inner devices.

The ferromagnetic sphere and cube with and without the thin plate boundary condition were compared. The computer results of the magnetic field of a sphere were compared with an analytical solution. A superstructure, decks, hull and bulkheads of a corvette were modeled. An analysis of ship’s magnetic field with consideration of inner ferromagnetic devices and with degaussing system was carried out.

The results of the analytical and numerical comparative analysis of magnetic field of cube and sphere have shown that the thin plate boundary condition is a good method for analysis of magnetic signatures of thin-walled objects. The computer simulations of the corvette model have shown that for relative magnetic permeability of a few hundred range the influence of inner ferromagnetic devices on the ship’s magnetic signature is negligible. The thin plate boundary condition is also good method for calculation of the ship magnetic signature with degaussing system and for optimization currents of coils.

The calculation time of ship’s magnetic field with the thin plate boundary condition bears resemblance to the ship model with layers of steel.

The purpose of this work is to present the strategies and current state of development in the field of micro solid oxide fuel cells (μSOFC).

In the paper recent strategies of conventional and single chamber μSOFC are described. Some examples based on the author's research are presented.

It can be concluded that scale down of ceramic technologies is still more popular than MEMS. However, MEMS‐based technologies become recently to be used more frequently.

The work is limited to the description of materials and technologies used in μSOFC.

The review presents very recent research in μSOFC. The results demonstrate critical areas in development of suitable technologies.

The purpose of this qualitative study is to explore the role of spirituality, understood as a personal relationship with God, in missionary intercultural experience.

We conducted narrative interviews with eight Polish consecrated missionaries in Argentina, Bolivia, Ecuador, Peru and Paraguay. We used thematic analysis to establish spirituality in missionary experience and narrative analysis to examine sensemaking processes.

Missionary spirituality was defined by a personal relationship with God as a source of consolation, psychological comfort, strength to cope with distressing experiences, and Grace promoting self-improvement. It compensated for the lack of family and psychological support and enhanced psychological adjustment to the environment perceived as dangerous. Spirituality helped missionaries deal with cultural challenges, traumatic and life-threatening events. Traumatic experiences furthered their understanding of the mission and triggered a spiritual transition that entailed a change in their life, attitudes and behavior.

Comparative research into religious vs nonreligious individual spirituality in the experience across various types of expats in various locations could capture the professional and cultural specificity of individual spirituality. Research is also needed to link spirituality with expat failure.

Catholic agencies and institutions that dispatch missionaries to dangerous locations should consider providing professional psychological assistance. Narrative interviewing could be used to enhance missionaries' cultural and professional self-awareness, to better serve the local community. Their stories of intercultural encounters could be incorporated into cross-cultural training and the ethical and spiritual formation of students and future expats.

This study captures a spiritual aspect of intercultural experience of under-researched expats. It offers a model of the involvement of individual spirituality in coping in mission.

The purpose of this paper is to investigate application possibilities of soft magnetic composites (SMC) in the design of high speed permanent motors for home appliances.

The design of high speed permanent magnet motor (HSPM) with core made of SMC has been proposed. The governing information about SMC has been presented. The possible advantages and disadvantages of applying magnetic powder materials in the design of electrical machines have been studied. To solve the partial differential equations describing magnetic vector distribution in considered HSPM, the edge element method (EEM) has been applied. The formulas of permanent magnet and winding descriptions, and electromagnetic torque calculations have been presented and studied. To verify accuracy of methodology and functionality of the elaborated software, a prototype of the considered motor has been built and the experimental setup for testing torque and electromotive force has been elaborated. The comparison between measured and simulated motor characteristics have been presented and discussed.

Comparison between measured and simulated motor characteristics proves the model accuracy. The obtained results show that the designed HSPM motor has sinusoidal electromotive force waveforms, low cogging torque value and the sinusoidal torque versus rotor angle characteristics. Moreover, it has been indicated that the application of SMC materials can reduce power losses in the high speed motors.

The paper describes the development of the numerical method and software for analysis of HSPM with core made of powder materials.

Although there are many journalistic accounts of ongoing political events narrating about pro-democratic or antiauthoritarian movements, such as strikes, riots, and protest letters, not many scholarly analyses devote attention to the longitudinal analysis of the preceding events that lead to a spur of protests. Not many scholars account or are able to account for the activity of political dissidents that is often hidden, purposely censored, and covered from public eye. Most frequently, until the street strike and riots, the degree of spread of dissident activity within a country is unknown to scholars. It is equally difficult to find information about the national and international networks that political activists form to gain support and acceptance of their acclamations, propositions, and calls for political or economic reforms. Furthermore, only access to dissident press allows researchers to glimpse the activity of existing organizations looking at issues censored by existing governments.