Lacydonia (Polychaeta: Phyllodocida) is a poorly known genus containing 16 species that are sporadically collected in low densities all over the world oceans. During three cruises (in June 2014 in Ullsfjorden, northern Norway, in January 2015 in Kongsfjorden, and in June 2012 in Smeerenburg, Svalbard) nine specimens of Lacydonia eliasoni were found on sandy and muddy sediments at depths from 180 to 350 m. All specimens were incomplete and consisted of 10 to 29 chaetigers. This study presents the first record of the Lacydonia genus in the waters of Svalbard as well as the first record of L. eliasoni in coastal waters off northern Norway. This species has been reported previously in the Skagerrak and Trondheimsfjorden (southern Norway), our findings therefore may indicate a northward extension of its range, possibly due to climate changes.

The Kuroshio Extension front (KEF) considerably influences the underwater acoustic environment; however, a knowledge gap persists regarding the acoustic predictions under the ocean front environment. This study utilized the high-resolution ocean reanalysis data (JCOPE2M, 1993–2022) to assess the impact of the KEF on the underwater acoustic environment. Oceanographic factors were extracted from the database using the Douglas-Peucker algorithm, and acoustic propagation characteristics were obtained using the Bellhop raytracing model. This study employed a backpropagation neural network to predict the acoustic propagation affected by the KEF. The depth of the acoustic channel axis and the vertical gradient of the transition layer of sound speed were identified as the fundamental factors influencing the first area of convergence, with correlations between the former and the distance of the first convergence zone ranging from 0.52 to 0.82, and that for the latter ranging from −0.42 to −0.7. The proposed method demonstrated efficacy in forecasting first convergence zone distances, predicting distances with less than 3 km error in >90% of cases and less than 1 km error in 68.61% of cases. Thus, this study provides a valuable predictive tool for studying underwater acoustic propagation in ocean front environments and informs further research.

The object of analysis in the paper is semantic extension of a lexical unit. In order to approach it, the author chooses one of the cognitive linguistics theories – Cognitive Grammar (Langacker 1987; 1990; 2000a; 2000b; 2008, etc.). Two of the issues of semantic extension are emphasised. First, it is the grounding of semantic extension in the encyclopaedic knowledge shared by the interlocutors and second, the emergence of the schema implied by the relation of extension. The paper begins with an outline of the postulates of Cognitive Grammar, which are subsequently applied to an analysis of the French lexical unit corps [body], whose extended senses are found in the domain of the structure of musical instruments. In the conclusion the author discusses the dimensions of complexity of the process of semantic extension, one of which is a chain of relations based on metonymy and metaphor.

The paper deals with bifurcation and/or non-bifurcation post-buckling curves of composite plates under biaxial compression. For different lay-up sequences, a coupling, i.e. extension-bending (EB) is considered. The current investigations present distinct equilibrium paths describing when they have bifurcation-type and/or non-bifurcation-type responses. The novel parameter (i.e. EB coupling imperfection) is calculated to show the amount of non-bifurcation in the equilibrium path as a quantitative parameter. For the case of non-square plates, a novel mixed-mode analysis is conducted. The effects of different characters in laminated composites such as layer arrangement, loading ratio, aspect ratio, and boundary conditions are investigated. A novel result concluded in the numerical examples where there are some possibilities to have different mode shapes in linear and non-linear buckling analysis. FEM results of ANSYS software verify the results of analytical equations.

The classical Cayley–Hamilton theorem is extended to fractional different order linear systems. The new theorems are applied to different orders fractional linear electrical circuits. The applications of new theorems are illustrated by numerical examples.

This paper presents a method intended for calculation of steady-state processes in AC/AC three-phase converters that are described by nonstationary periodical differential equations. The method is based on the extension of nonstationary differential equations and the use of Galerkin's method. The results of calculations are presented in the form of a double Fourier series. As an example, a three-phase matrix-reactance frequency converter (MRFC) with boost topology is considered and the results of computation are compared with a numerical method.

This paper presents a method of calculation of steady-state processes in threephases matrix-reactance frequency converters (MRFC's), in which voltages and currents are transformed by control signals with two pulsations. A solution of nonstationary differentia equations with periodic coefficients that describe this system is obtained by using Galerkin's method and an extension of equations of one variable of time to equations of two variables of time. The results of calculations are presented in an example of three-phases MRFC with buck-boost topology and compared with a numerical metod embedded in the program Mathematica.

Dans la tradition sémitologique le problème du «bilitèrisme ou «trilitérisme» de la racine consonantique est traité d’habitude avec la réconstruction linguistique des unités parentes. Ici on propose de traiter le processus de la «triconsonantisation» de la racine consonantique comme un résultat de l’action des facteurs morphologiques: le paradigme verbal et le paradigme de la flexion «interne».

Aquaculture plays a great role in producing foodstuffs, sustaining inland capture fisheries and providing employment. The key to future development in pond aquaculture is diversification of production technology, intensity, and function connected to increasing the environmental value of pond areas. New production systems involve a combination of intensive and extensive pond culture, increasing productivity and improving nutrient utilisation and fish species diversification. The most important principle of these systems is the possibility to use the wastes from intensive aquaculture as the input for extensive, environment-friendly fish production. These systems were proven to be profitable and sustainable in tropical and subtropical areas. However, for temperate climatic conditions, such data are scarce. For this reason, we decided to discuss modifications that, in our opinion, can be applied in an extensive part of the integrated intensive-extensive system in temperate climatic conditions in order to increase the overall productivity of the pond aquaculture.

When machine tool spindles are running at a high rotation speed, thermal deformation will be introduced due to the generation of large amounts of heat, and machining accuracy will be influenced as a result, which is a generalized issue in numerous industries. In this paper, a new approach based on machine vision is presented for measurements of spindle thermal error. The measuring system is composed of a Complementary Metal-Oxide-Semiconductor (CMOS) camera, a backlight source and a PC. Images are captured at different rotation angles during end milling process. Meanwhile, the Canny edge detection and Gaussian sub-pixel fitting methods are applied to obtain the bottom edge of the end mill which is then used to calculate the lowest point coordinate of the tool. Finally, thermal extension of the spindle is obtained according to the change of the lowest point at different time steps of the machining process. This method is validated through comparison with experimental results from capacitive displacement sensors. Moreover, spindle thermal extension during the processing can be precisely measured and used for compensation in order to improve machining accuracy through the proposed method.

The following article can serve as yet another report from the workshop of an Etymological Dictionary of Arabic ( EtymArab).1 Work on a ‘zero version’ of such a dictionary has seen (slow but) steady progress since several years now. Taking the root √SLQ as an example, this contribution gives an idea about the high potential of such a project, but also shows its clear actual limits. The enormous spectrum of semantic values covered by √SLQ—one may distinguish more than thirty meanings that, at first sight, do not seem related to each other—provides a fine illustration of the complex composition of the modern as well as the classical lexicon. The current state of affairs in Arabic etymology allows us, to a certain degree, to ‘sort out things’ and bring some order into this confusing complexity. In many cases, however, research also remains ‘hanging in the air’.

This paper presents the issue of the vertical extension of buildings, mainly residential, as an element of sustainable housing policy of European cities. This type of construction project allows for the acquisition of additional residential space, using the existing technical infrastructure, and also not deepening the effect of urban sprawl. Vertical extensions allow for the construction of new apartments in urban areas, being one of the forms of densifying the existing buildings. The study reviews research on the subject of vertical building extensions, trying to answer the research questions posed: how and with the use of which building analysis tools it is possible to improve the process of vertical extension, so that it can become an actual element of the housing policy of cities. Three original studies were selected for the analysis: from Germany, Belgium and England, which met the criteria set by this study, presenting a universal scheme of action for vertical extensions, not treating them as incidental, individual construction intervention, and treating vertical extensions as an element of systemic action for the acquisition of new apartments. The selected studies are carried out in countries economically and culturally similar to Poland, which was also one of the selection criteria. The study is also to be a voice in the discussion on the possibility of the vertical extension of residential buildings as an element of housing policy in Poland.

The Distributed Ledger Technology (DLT) is a peer-to-peer model of sharing data among collaborating parties in a decentralized manner. An example of DLT is a blockchain where data form blocks in an append-only chain. Software architecture description usually comprises multiple views. The paper concentrates on the Deployment view of the DLT solution within the 1+5 architectural views model. The authors have proposed Unified Modeling Language (UML) extensibility mechanisms to describe the needed additional semantic notation to model deployment details. The paper covers both the network and node levels. The proposed stereotypes and tagged values have enriched UML Deployment diagram. We have gathered those modeling elements in dedicated UML Profile for Distributed Ledger Deployment. We have applied the profile to model Deployment view of a renewable energy management system that uses R3 Corda framework. The system records information about inbound and outbound energy to/from renewable energy grid.

Generalized Rademacher functions, constructed as a sequence of elements of Galois fields are intended to find the spectral representation of signals with levels. These functions form a complete basis on the interval corresponding to -1 discrete time intervals and for passing into the classical Rademacher functions. The advantage of such spectra obtained using Galois Fields Fourier Transform is that the range of variation of the spectrum amplitudes remains the same as the range of variation of the original signal, which is modeled on discrete time functions taking values in the Galois field.