<abstract xmlns="http://www.w3.org/1999/xhtml">

In this paper, we present the calculation of thermal magnetic viscosity based on numerical simulations of relaxation isotherms curves for a Stoner–Wohlfarth ensemble. The Stoner–Wohlfarth particles is described by two equilibrium states and thermal activation is done by overcoming the energy barrier. For simulations we have used a new Preisach type model for Patterned Media, which takes into account the effects of time and temperature. The magnetization of the system is treated using the Preisach Model for Patterned Media with bimodal interactions field distributions. We have simulated relaxation curves starting from different points on the negative region of the descending branch of the major hysteresis loop and from the obtained data we evaluated the thermal fluctuation field. The results obtained for the linear energy barrier were compared with the non-linear energy barrier.
</abstract>

“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine

Department of Exact Sciences, Faculty of Horticulture

The Relaxation Effects in the Preisach - Néel Model of Patterned Media

<abstract xmlns="http://www.w3.org/1999/xhtml">

A correlation between the informational Universe and various structures of the Universe (atom, planetary systems, galaxy pairs etc.) are established. The link between these structures can be found in the concept of holography, which can be mathematically explicated through multifractality.
</abstract>

“Grigore T. Popa” University of Medicine and Pharmacy

Faculty of Dental Medicine, Biophysics Department

Faculty of Medicine, Biophysics and Medical Physics Department

The Atom of the Physical “Reality” or the Essentiality of the Vacuum

<abstract xmlns="http://www.w3.org/1999/xhtml">

The existence of many forms of “liquid wood”, even in the same subgroup, is explained by the fact that the main matrix is made of lignin and lignin can be found in nature in over 60 presentation forms. The lignin molecule is a complex macro – molecule made of three molecules which link together in various shapes. At the same time, structurally speaking, the lignin molecule is dependent on the type of plant species from which it is sourced. It results that the type and the structure of the lignin molecule – and implicitly the “liquid wood” biocomposite matrix – has a major role in the forming and the structuring of every type of “liquid wood”. In the current article, a comparative study of the properties of “liquid wood” pertaining to all three subgroups is presented. The chosen types are: Arboform F45, Arbofill Fichte and Arboblend V2 (which is the subject of the entire study).
</abstract>

“Alexandru Ioan Cuza” University of Iaşi

Department of Natural Sciences and Mathematics

“Gheorghe Asachi” Technical University of Iaşi

A Comparative Study of the Properties of Different “Lichid Wood” Presentation Forms

<abstract xmlns="http://www.w3.org/1999/xhtml">

In this paper, different considerations on atoms, pseudo-atoms and minimal atoms are given for several types of non-additive set functions. In this sense, their properties, different relationships, examples and counterexamples are given.
</abstract>

Atoms of Certain Types of Non-Additive Set Functions

<abstract xmlns="http://www.w3.org/1999/xhtml">

This paper presents a short history from Philosophiae Naturalis Principia Matematica of Newton to skyrmions of Skyrme. It is shown that the classical mechanics does not exclude skyrmions (as topologically stable field configuration of a certain class of non-linear sigma models- for example nucleon model). In certain conditions the Newtonian Theory becomes fundamental in building of modern physics theories (as quantum mechanics, fields theories, etc.).
</abstract>

“Gheorghe Asachi” Technical University of Iași

From Classical Newtonian Phylosophy to Skyrmion – A Short History

<abstract xmlns="http://www.w3.org/1999/xhtml">

Assimilating any complex economic system with a fractal, in the most general Mandelbrot’s sense, non – differentiable behaviors in its economic dynamics are analyzed. As such, economic dynamics in the form of Schrödinger – type various regimes imply “holographic implementations” of the economic processes through group invariance of SL(2R) – type. Then, by means of previous group invariance as synchronization group between any economic system entities, both the phases and the amplitudes of the entities are affected from a homographic perspective. The usual “synchronization” manifested through the delay of the amplitudes and phases of the entities of the economic system must represent here only a fully particular case. In a special case of synchronization of economic system entities, given by Riccati type gauge, period doubling, damping oscillations, self – modulation and chaotic regimes emerge as natural behaviors in the economic dynamics of the economic processes.
</abstract>

On the Holographic Type Dynamics in Complexity Economics

AHEAD OF PRINT

Volume 70 (2024): Issue 1 (January 2024)

Volume 69 (2023): Issue 1-4 (December 2023)

Volume 68 (2022): Issue 4 (December 2022)

BULETINUL INSTITUTULUI POLITEHNIC DIN IAȘI. Secția Matematica. Mecanică Teoretică. Fizică

Volume 68 (2022): Issue 1 (March 2022)

Volume 67 (2021): Issue 4 (December 2021)

Volume 67 (2021): Issue 3 (September 2021)

Volume 67 (2021): Issue 2 (June 2021)

Volume 67 (2021): Issue 1 (March 2021)

BULLETIN OF THE POLYTECHNIC INSTITUTE FROM IAȘI, Section Mathematics, Theoretical Mechanics, Physics – BIPMF (ISSN-L 1224-7863) is an international journal, with quarterly appearance, for the free publication of research results in theoretical and mathematical physics, mechanics, technical and applied physics, material sciences.  The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes physics, mechanics and mathematics, and given their importance in material sciences, interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, surfaces/interfaces are welcomed if they demonstrate insight into physics, seeking to understand mathematical basis of physical phenomena, and solve problems in physics via mathematical approaches. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.  BIMMF aims to enhance the interdisciplinary research by connecting the fundamental sciences as physics and mathematics with applicative research concerning the relationships between structure, processing, properties, and performance of materials. It also promotes international exchange of scientific activities.  The journal publishes original research, focused review articles that examine the state of the art, book reviews, technical notes, case studies, and preliminary communications, with no restriction on the length of the papers.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. sistemantiplagiat.ro/ 