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Modern biological fertilizers and biological fertilizers components can release nutrients in bioavailable forms in a controlled manner. Quick evaluation of nutrient bioavailability, essential in the evaluation of quality of fertilizers, is possible to use in vitro extraction tests (conventional, microwave, ultrasonic), described in this article. These tests enable not only total content of nutrients...
The article presents the steps followed for the development of the schematic equation by new rules for memory realization in Grafpol method. These steps are presented on the example of coal filling bolt in a power plant boiler.
Bioavailability of nutrients is crucial in obtaining high crop yields and influences the possible pollution of groundwater. The paper presents in vivo methods (seed testing, pot trials, field trials) of the evaluation of micronutrients bioavailability from fertilizers which enable selection of the most efficient way of micronutrient fertilization by determination of bioavailability of micronutrients,...
A method of high-speed camera recording for registration of dynamic crushing was presented. Energy-absorbing structures commonly used in the automotive industry were studied. Registered high-speed camera signal was compared with the signal obtained by integration of the crushing force.
To determine the influence of the magnetic field on the human body, a following experiment was performed. There were recorded 30 ECG signals, 2 for each volunteer: prior to exposure to the field (sample 1) and immediately after exposure (sample 2). The characteristic features were extracted from the recorded signals. The ECG features were determined by measurement and averaging of height of key waves...
In this paper we consider a modified Rectangle Packing Problem where for each rectangle (module) its width and height come from uniform probability distribution between 0 and 1 - U(0,1). We provide a probabilistic analysis of a simple polynomial-time algorithm for Rectangle Packing Problem. At the end a comparison to the computer simulations is presented.
The paper presents a methodology of research on the magnetic field influence on the human body, based on pattern recognition algorithms. A group of 15 volunteers has been exposed to a 50Hz magnetic field of strength 60 A/m. There were recorded 30 ECG signals, 2 for each experiment participant. The first signal was recorded before an exposure to a magnetic field, and the second signal immediately after...
Magnetic core-shell structures have a high potential for promising application in biomedicine as drug carriers. In this paper, magnetic core-shell structure obtained by the sol-gel method was presented. In order to provide the protective coating of magnetic MnFe2O4 nanoparticles, amorphous silica was used. It has been shown that magnetic core was successfully encapsulated in SiO2 matrix and that the...
Rising requirements for a new constructions, force engineers to monitor them all day long. An attractive solution seems to be applications of wireless sensors. However, there is a barrier limiting their application, which is the need to supply them with an electrical power over extended period of time without using additional wiring or batteries. The potential solution of this problem seems to be...
Roughness of surface of Intraocular Lens plays an important role, which can provide important information on the interaction between the surface of the implanted lens and lens capsule, among others. Although surfaces appear smooth to the naked eye, they are quite rough at the microscopic levels. The paper presents a technique for measuring surface roughness using AFM. It was found that the size of...
The paper presents measurement method of fast eye movement by use of the high-speed CCD camera, with recording rate 200fps. Sequences of the pupil’s images recorded within 10 seconds were next decomposed into frames and processed numerically. The position of the center of eye pupil were used to describe the eyeball movement during fixation. The calculated results allowed to achieve the goal of this...
Nowadays, the use of bisphosphonates are the gold standard of treatment of bone diseases. Due to the high utility of these compounds, scientists still search for better and better structures, with a variety of substituents at carbon’s atom and create new libraries or improve methods of their synthesis. To determine the potential effect of newly discovered bisphosphonates, for example antiosteoporotic...
In this work authors presented distribution of circumferential stress in wound composite structures made from different layers. The cylindrical shape specimens were made from layers which have different elastic moduli. Manufactured specimens underwent strength test to obtain distribution of circumferential stress as a function of radius. Circumferential strain on outside surface was measured by fiber...
This paper presents process optimization results of laser powder micrometallurgy of AZ31 alloy, for eliminating porosity in melted material. Full factorial design of three factors at three levels was conducted, and the influence of laser beam power, point distance and exposure time was examined.
The main aim of the studies presented in paper was to optimize the parameters of the recrystallisation annealing process used in the course of cold plastic working of high carbon steel for patented wires. Object of the research described in the work was eutectoid steel of 0,8% content of C designated for production of colddrawn wires applied for reinforcement of car tires, hoses and ropes. The results...
Oxygen permeability seems to be the most important parameter characterize the contact lens. Lenses, which permeable more oxygen to the cornea are safer, reduce the risk of infection and provide greater comfort of wearing. Oxygen permeability of contact lenses might be calculated by analysis of porosity of its surface. With using special program the size and number of pores on definite area was calculated...
Even though selective laser melting (SLM) has been available for more than a decade, during few last years the interest in this technology has grown extremely. SLM technology allows to fabricate fully functional and complex metal objects, layer by layer, via selective melting of material using laser beam. However, producing object by melting thin layers of material causes conditions of fast heat removal...
Pearlitic steels containing from some 0,8 to 0,95% C belong to the group of unalloyed steels of the quality class destined for cold drawing or rolling, they find application mainly as wires used for reinforcement of tires, hoses or rope production. However this group of steels characterized low machinability, as a consequence of presence hard plates of cementite, the intervention ameliorative this...
Głównym celem prowadzonych prac było opracowanie i wytworzenie zestawu elementów testowych (benchmarków) które określiłyby możliwości budowy elementów dla technologii addytywnego wytwarzania Electron Beam Melting (EBM). Opracowane części miały za zadania sprawdzenie możliwości budowy przestrzennych prymitywów geometrycznych jak pręty, cienkie ściany czy możliwości wytwarzania przelotowych otworów...
The article presents the methods of size analysis implementation. It contents a sieving method and laser diffraction method (also known as a laser method). The content includes the characteristics of the selected methods which were presented. Comparison is supported by results of sieve analysis and the laser method. The subject of the researches was iron powder applied in the production of metal cored...
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