Management of hip osteonecrosis in the young is challenging, and femoral head preservation surgery is often preferred. We report the first local case of treating advanced hip osteonecrosis with a vascularised fibular graft in a 26-year-old man who presented with left hip pain after a fall. He was diagnosed with left hip osteonecrosis and underwent core decompression and insertion of a vasculari...

This essay shows the differences between philosophy of humanists and transhumanism. The first aims to give a comprehensive view man seen from rational ethical point view, highlighting his central position in universe its impact on other living beings climate change. Transhumanism focuses specifically optimization Homo sapiens, perfect it through technical-scientific program (development cyborgs...

In everyday practice, geothermal energy is treated both by us professionals, and regular users as one of renewable energy sources. Although we tend to concentrate on its utility and technical value, geothermal is also part of our civilization and history. Therefore, it is worthwhile to spend some time investigating this kind of energy to learn its role and place in historical and cultural herit...

The paper discusses the needs of new expressive means for modeling a socio-technical system as consisting of functional components that are connected to each-other through the output-input relationships. The discussion is based on an example of depicting so-called feedback connections between the functional components of a system. The need to introduce a feedback connection arises when two conn...

This paper discusses the process of creating a digital twin product, which is virtual model mechanical connection. The modeling was carried out using Pro/ENGINEER software, allows building three-dimensional product assembly process, set electronic models equipment and tools. include mathematical description geometric, physical-mechanical technical parameters objects under consideration. It show...

We consider graphs that admit polyline drawings where all crossings occur at the same angle α ∈ (0, π2 ]. We prove that every graph on n vertices that admits such a polyline drawing with at most two bends per edge has O(n) edges. This result remains true when each crossing occurs at an angle from a small set of angles. We also provide several extensions that might be of independent interest.