This article is a review of Ethan Kleinberg’s Haunting History. For a Deconstructive Approach to the Past (Stanford, 2017). I focus on three issues related to that work. These are: historians’ attitude towards the deconstruction; the idea of ontological realism and its critique; the role of young historians in modern academia. This text is based not only on the book reviewed but also on its different analyses and ways it was used in other research. In the conclusion, I present how Haunting History can be used as an emancipatory tool by scholars who are starting their academic careers now.

In the world of Darwinian rivalry, where the fittest individuals take advantage of others, explaining acts of altruism poses one of the most fundamental problems in evolutionary biology. In a previous issue of Academia magazine (4/2015), Dr. Kinga Wysieńska-Di Carlo and Dr. Zbigniew Karpiński explored this issue from the perspective of sociologists; here it is viewed through the prism of mathematics.

In the article, the topic of mentalization as the ability to attribute mental states to oneself and others is considered. The author concentrates on the aspect of the mental states in different approaches to mentalization. She proposes that the inclusion of various mental states is justified, although it induces some difficulties. In the conclusion, consequences of applying current conceptions and using them to elucidate the variety of mental states are presented.

The aim of this paper is to study the applicability of the theory of micropolar fluids to modelling and calculating flows in microchannels depending on the geometrical dimension of the flow field. First, it will be shown that if the characteristic linear dimension of the flow becomes appropriately large, the equations describing the micropolar fluid flow can be transformed into Navier-Stokes equations. Next, Poiseuille flows in a microchannel is studied in detail. In particular, the maximal cross-sectional size of the channel for which the micropolar effects of the fluid flow become important will be established. The experimentally determined values of rheological constants of the fluid have been used in calculations.

In the face of challenges faced by today’s managers, such as unreliability of processes conducted

within the company, low quality of materials, too long time of fulfilling the customer

orders and missing the deadlines of their implementation, the role of dynamic parameters of

the warehousing as the source of competitive advantage of a modern enterprise is growing.

The aim of the study is to identify and analyze the factors determining the effective implementation

of the warehousing in the Distribution Center. In the research there has been

adopted the following hypothesis: with the increase in the number of customer orders, which

is characterized by an increasingly smaller number of assortment items, the importance of

managing constraints limiting the material flow within the warehousing is increasing. The

above-mentioned hypothesis is verified in accordance with the test procedure including literature

research and a case study. The research results show that the Theory of Constraints

is an excellent tool supporting the transformation of the warehouse management method.

With the help of the Theory of Constraints it is possible to determine precisely the places

in the material flow, where the adaptation actions undertaken bring down the greatest

effects.

A general model of the equations of generalized thermo-microstretch for an infinite space weakened by a finite linear opening mode-I crack is solved. Considered material is the homogeneous isotropic elastic half space. The crack is subjected to a prescribed temperature and stress distribution. The formulation is applied to generalized thermoelasticity theories, using mathematical analysis with the purview of the Lord-Şhulman (involving one relaxation time) and Green-Lindsay (includes two relaxation times) theories with respect to the classical dynamical coupled theory (CD). The harmonic wave method has been used to obtain the exact expression for normal displacement, normal stress force, coupled stresses, microstress and temperature distribution. Variations of the considered fields with the horizontal distance are explained graphically. A comparison is also made between the three theories and for different depths for the case of copper crystal.

In 2018 we celebrate the 250th anniversary of the Jędrzej Śniadecki’s birth. This work aims to show the importance of his thoughts for the development of natural sciences. He studied at some of the largest universities in Europe, where he met great scientists of the Enlightenment. The effects can be seen in his works. He was remembered as a founder of Polish biochemistry, anthropology and pathology, also as the author of chemical terminology and language. The essence of his thoughts is Theory of organic being, which is an attempt to answer the question: „what is life?”. Jędrzej Śniadecki introduced a new definition of life based on the term „organic power”. This work shows how import are the thoughts of Jędrzej Śniadecki in the context of the times in which he lived, as well as the following development of natural sciences, what makes him and his theories worth memory.

Subsidence process in the rock mass disturbed by mining can be complicated and can be faster or slower depending on the geological structure and physical and mechanical properties of the rock mass, changes in exploitation geometry, and changes in the rate of exploitation. The most frequently, the subsidence process develops over years in a way that is difficult to observe over a short period (days). It has been proven in practice of coal mines in Poland that Knothe’s model describes subsidence process with high accuracy. It is based on treating the rock mass as a stochastic medium and describing subsidence with stochastic equations.

It can be assumed that, the complicated stress field as a result of mining activities induce a series of displacements of different sizes in rock mass. The inelastic deformation in rock mass is accompanied by a microseismicity that can be recorded and processed. We assumed that seismic noise with weak seismic events is a low-energy part of the microseismicity. We proposed an analytical solution to examine the distribution of the energy of the seismic noise during subsidence process development based on Knothe’s model. In general a qualitative method of subsidence process assessment by the registration of the seismic noise was described.