Spiral patterns on the Neolithic pottery of East Asia and the Far East

The paper focuses on the investigation of East Asian and Far East Neolithic spiral patterns, with the application of some mathematical principles. The basis of the research is published data on pottery assemblages from Japan, Eastern China, and the Amur River basin from the 6th to the beginning of the 1st mil. BC. We suggest a descriptive order of spiral patterns based on the typology of spiral figures used in geometry. This approach permits us to see the regional and cultural diversity of Neolithic spiral patterns within the research area.V članku se ukvarjamo z matematičnimi principi vzhodnoazijskih in daljnevzhodnih spiralnih vzorcev. Raziskava temelji na objavljenih zbirih lončenine iz Japonske, vzhodne Kitajske in območja reke Amur od 6. do 1. tisočletja p.n.š. V članku predlagamo opis in razvrščanje spiralnih vzorcev na podlagi tipologije spiral v geometriji. Skozi ta pristop lahko opazujemo regionalno in kulturno raznovrstnost neolitskih spiralnih vzorcev na študijskem območju

Formation of electron beam fields with 3D printed filters

In this research the electron beam traverse profiles beam before and after the application of the developed filter element was calculated and experimentally obtained. The article presents the calculated parameters of the unit form and geometrical dimension, forming the determined electron beam profile, and the physical configuration of the filter produced by 3D print method. The electron beam field distributions before and after filtration obtained with the help of GAFCHROMIC EBT2 radiographic films are illustrated. The calculation method of the filter actual density determination is presented. In the paper the comparison results of the electron beam experimental and calculated profiles are shown

Measurement Technique of Dose Rate Distribution of Ionization Sources with Unstable in Time Beam Parameters

The article describes a new technique for the average values of radiation dose measurement for the unstable gamma-ray sources which are used in non-destructive testing. The method is based on usage of different types of compact accumulative dosimeters. Spatially distributed position sensitive dosimetry system based on compact sensitive elements was created. Size and spatial resolution of the system of the dosimetry system are chosen taking into account sources characteristics. The proposed method has been tested on the measurement of dose distribution of several sources of X-ray and gamma-radiation based on X-ray tubes, electronic accelerator betatrons and linear electron accelerators

Spiral patterns on the Neolithic pottery of East Asia and the Far East

The paper focuses on the investigation of East Asian and Far East Neolithic spiral patterns, with the application of some mathematical principles. The basis of the research is published data on pottery assemblages from Japan, Eastern China, and the Amur River basin from the 6th to the beginning of the 1st mil. BC. We suggest a descriptive order of spiral patterns based on the typology of spiral figures used in geometry. This approach permits us to see the regional and cultural diversity of Neolithic spiral patterns within the research area

The X-ray Beam Passage through the Collimator Made of Different Materials: Numerical Simulation

The X-ray beam application grows in the research investigations, in the medical diagnosis and treatment, in the industry. In this paper the theoretical model of the actual pulsed X-ray generator RAP-160-5 beam developed in the program "Computer Laboratory (PCLab)" is shown. The simulation data of the X-ray beam profile and shape collimated by different materials (gypsum, corund-zirconia ceramic, lead) are illustrated

Studying Properties of Prospective Biologically Active Extracts from Marine Hydrobionts

Biologically active substances (BAS) extracted from marine hydrobionts are characterized by high diversity and efficiency. They are represented by carotenoids, phospholipids, saponins and other compounds possessing high antioxidant (AOA), antitumor, immunomodulatory, radioprotective, and hypolipidemic activities. Because of extremely high marine BAS activity, the BAS dose necessary for treatment and prevention of many diseases is very small.  The aim of present work was to assess biological properties of BAS complexes extracted from Black Sea marine inverterbrates for their following using in pharmacological preparations including liposomal drug delivery. BAS complexes were extracted from marine invertebrate tissues by two-phase extraction in combination with ultrasonication. Antioxidant activity of BAS extracts was determined with potassium permanganate discoloration method in an aqueous sulfuric acid medium. Antimicrobial activity was investigated by germination of BAS extracts.  BAS influence on lymphocyte proliferative activity was studied with help of cytogenetic analysis. In this paper, the assessment of antioxidant, antimicrobial and mitogenic activities of biologically active complexes extracted from marine invertebrate tissues is presented. BAS properties in the oil  and alcohol-water phases are compared. For the first time BAS complexes from Black Sea invertebrates are extracted by the resource-light method of two-phase extraction in combination with ultrasonication. Conditions for obtaining BAS extracts with optimal characteristics are proposed

INFLUENCE OF A BIOLOGICALLY ACTIVE COMPOUND FROM SUBSTITUTED THIADIAZINES ON TRANSAMINASE ACTIVITY IN MYOCARDIAL HOMOGENATE IN EXPERIMENTAL MYOCARDIAL INFARCTION

Objective: Earlier works have reported on the effectiveness of the compounds of the group of substituted 5R1, 6R2, 3,4-thiadiasine-2-amines for treating experimental myocardial infarction, conditioned by the immune-modifying action of the compound. The purpose of this study was to evaluate the action of the L17 compound of the group of substituted 5R1, 6R2, 3,4-thiadiasine-2-amines on the extent of injury and the possible recurrence of experimental myocardial infarction by the dynamic assessment of transaminase activity in blood and myocardial homogenate (tissue).Methods: Modelling of myocardial infarction in rats was performed in accordance with the author's modification of the standard ligation model. Tissue enzyme activity of LDH and CK-MB was evaluated at days 1, 7, and 14.Results: According to the results, the decrease in LDH 1-2 activity in tissue (after experimental myocardial infarction) corresponded to the increase in enzyme activity in blood on the first day of the experiment. However, on the seventh day of the experiment, the decrease of LDH 1-2 activities in the tissue of animals treated with L17 compound corresponded with the decrease of LDH activity in blood, while in non-treated animals the relation between the enzyme levels in blood and tissue was typical for the onset of MI.Conclusions: The evaluation of enzyme levels in myocardial tissue confirms previouslyreported data that the administration of a thiadiazine compounds prevents the recurrence and decreases the size of experimental myocardial infarction.Â

Development of the method for the electron beam spatial distribution determination in the transverse plane

The article presents the device destined for flux density distribution of electrons in the beam cross section without consumables, with a resolution of about 1 mm and slightly dependent on the electron energy. The possibility of the cross section reconstruction of the electron flux density distribution by the inverse Radon transformation is shown. The results of mathematical reconstruction are illustrated and upon which the projections optimum quantity are specified. In the paper the experimental set up developed based on proposed method is introduced. The results of the experimental tests of the scanning device functionability are presented