THE ALGOFLORA OF THE PONDS OF DIUKOVSKYI PARK OF CITY ODESA

Introduction. Microscopic algae play an important role in ecosystems of ponds. They create a primary organic matter, select oxygen, utilize carbon dioxide, inorganic and organic contamination in water and are a meal for numerous aquatic lives (infusoria, worms, crustaceas and fishes). Aim. The aim of the work was to study the current state of the algoflora of the ponds studied. Methods. The samples collected from November 2011 for August in 2020 on two ponds of Diukovskyi Park served as materials for the research. The samples were collected in phytoplankton, periphyton and microphytobenthos in spring, in summer and in autumn. On the whole 80 samples were collected and treated. The specific composition of algae was studied by the light microscope XSP-104. Results. The results of the research (2011-2020) of the specific composition of microscopic algae from 2 ponds of Diukovskyi Park of city Odesa were generalised. The species composition of the microphytes of Dukovskyi ponds included 67 species of algae, which belonged to 49 genera, 36 families, 21 orders, 9 classes, 7 divisions, 4 kingdoms and 2 empires. The number of species in the ponds was dominated by representatives of diatoms (38 species), blue-green (13), green (7) and khar (5). 13 species belonged to the empire of prokaryotes, 54 species – to eukaryotes. The kingdom of eubacteria is represented by 13, chromists ‒ 40, protozoa – 2, plants ‒ 12 species. Representatives of the leading genera Cosmarium Corda et Ralfs (5 species), Nitzschia Hassall (4) make up the algoflora of the ponds. For the first time, 14 new species of algae were registered for the ponds of Diukovskyi Park. The Sorensen-Chekanov similarity coefficient of the species composition of the algae ponds between the algoflores of Diukovskyi park and the arboretum named After Victory was 0.44, and Jakkar similarity ratio between them ‒ 0.29. In phytoplankton of ponds 20, periphyton ‒ 23 and microphytobentos ‒ 24 species were identified. By type of organization, single-celled forms were represented by 25, colonial - 33 and multicellular ‒ 6 species. Among them, there were 40 immobile, 27 taxa ‒ mobile. In accordance with the type of morphological differentiation of tallomas coccoid forms (50 taxa) dominated, filamentous constituted 6, capsal ‒ 6 and monad ‒ 4 species. The algoflora of the ponds of Diukovskyi Park is freshwater, alkaliphilic, mesosaprobic and cosmopolitan. Conclusions. The algoflora of two ponds of Diukovskyi Park consists of 67 species of microscopic algae, which belong to 7 divisions, 4 kingdoms and 2 empires. For the first time14 new species were identified for the ponds. The algoflora of ponds of Diukovskyi Park is freshwater, alkaliphilic, mesosaprobic and cosmopolitan.

Effects of geometric similarity ratio on the disturbance amplitude of shock-wave front in viscosity measurement

Geometric similarity ratio is one of the important factors that affects the disturbance amplitude of shock-wave front in viscosity measurement. In this paper, the Euler difference scheme of two-dimensional (2D) equations of viscous fluid mechanics is used to simulate the disturbance amplitude damping curves under different geometric similarity ratios, and the corresponding numerical solutions are shown. The samples of aluminum shocked to 80 GPa are taken as an example. The simulation results show that the initial conditions, material viscosity, wavelength, and sample geometric similarity ratio affect the evolution of the shock front sine wave disturbance. For flyer-impact flow field, the phase shift increases from 0 to a certain value with the viscosity coefficient for sample with wavelength [Formula: see text] mm and geometric similarity ratio [Formula: see text], 0.1. So, the geometric similarity method can be used to measure the viscosity of material. But it is found that the phase shift is sensitive to the geometric similarity ratio, which should be considered in Zaidel’s equation. So, some flyer-impact experiments will be carried out to determine the simulation results, and find the quantity relation of phase shift and viscosity of material in the future investigation.

Model Test Research on the Influence of Gate Blocking in Siltation Environment

Aiming at the clogging problems encountered in the operation of deep-hole gates in high water level reservoirs and dams, this paper carried out a model test study on the influence of different materials and different siltation environments on the lifting of the gates and analyzed the rules of the effects of blockages in different siltation environments. An analysis model of the pull-out force of the gate (blocked object) considering the siltation environment was proposed in an innovative way and the similarity ratio relationship was verified. The results of the study show that (1) the size and time of the siltation and other factors have a significant influence on the pulling force of the blocked object. It increases with the increase of the siltation area. The longer the siltation goes on, the greater the pulling force will be. (2) As the similarity ratio n increases, the calculation result of the analysis model is closer to the target value n 2 and it indicates that the theoretical model is reliable. The research results of this paper can provide certain guidance for deep-hole siltation dispatch to ensure project safety.

Shear Wave Elastography Combined with Thyroid Imaging Report and Data System for Risk Stratification of Thyroid Nodule Malignant Tumor

Benign and malignant thyroid cancer diagnosis is crucial. Our study intends to evaluate the role of shear wave elastography (SWE) and thyroid imaging report and data system (TI-RADS) in diagnosing the benign and malignant thyroid nodules. 100 thyroid nodules patients were recruited and evaluated by SWE and TI-RADS before fine needle biopsy and/or surgery. The maximum elastic index (Emax), mean elasticity index of thyroid nodules (Emean), minimum elastic index (Emin) and elastic ratio (ER) was measured and compared between different imaging. Ultrasound diagnosis showed solid nodules with significant hypoechoic, unclear boundary, and microcalcification. TI-RADS value was measured based on suspected ultrasound features. Combination of SWE and TI-RADS was performed. Among the 100 nodules, 38 were benign (38.0%), 62 were malignant (62.0%), and malignant nodules had significantly elevated SWE and TI-RADS compared with benign nodules (P < 0.001). The optimal SWE threshold for Emax was 51.95 kPa, with a sensitivity of 81.44% and specificity of 83.19%. There were two methods for combining SWE and TI-RADS. One was sequential detection, with a specificity of 95.80%, positive similarity ratio of 18.16 and PPV of 96.73%; the other was parallel detection method with a sensitivity of 94.85%, negative similarity ratio of 0.07 and PPV of 90.00%. Our results suggest that combination of SWE and TI-RADS might be applied to identify benign and malignant thyroid cancers.

FRACTAL SURFACE INTERPOLATION BASED ON CLASSICAL SUBDIVISION SCHEMES

A method to create a differentiable complex shapes from simple polygonal models is proposed. It is shown that classical schemes of “smooth” subdivision can be obtained from local self-similarity ratios if “deflection arrows” are scaled as s2, where s is the linear compression coefficient calculated for a flat regular grid of the same structure. The surfaces obtained by a smooth subdivision do not contain sharp features other than the vertices and edges of the original model, so in order to create a surface of more exotic shape one must use more complex model. The article describes an alternative approach, in which a fractal forecast of the position of embedded vertices, calculated using the local geometric self-similarity ratio, is used to obtain a pronounced surface shape. Fractal forecast transfers the properties of the original polygonal model to a smaller scale, thereby generating secondary sharp surface features that compose a large-scale texture. To ensure the differentiability of the surface, the fractal forecast is combined with the “smooth” one, and the proportion of the latter increases with decreasing scale.

Seleksiyonla Elde Edilmiş Bazı Ceviz Genotiplerinde SRAP Tekniği Kullanılarak Genetik Çeşitliliğin Belirlenmesi

Turkey is among the few countries in terms of plant diversity. An example of this situation is the variation in walnut seedlings grown from seed throughout the country. The genetic material to be used in fruit breeding should be original and the genetic relations among the genotypes should be well elucidated. In this research, genetic diversity was investigated among the walnut genotypes selected from Uşak province of Turkey with the use of molecular markers. In this study, molecular results showed that the 19 SRAP primer combinations produced, on average, 171 bands in the accessions examined, of which 77.2% were polymorphic. Base lengths of the bands obtained from markers varied between 100-1500 bp. The similarity ratio of walnut genotypes varied between 0.21 – 0.85. According to the results of the study, it was determined that SRAP marker system can be used to determine genetic diversity among walnut genotypes.

Analisis Pengaruh Teks Preprocessing Terhadap Deteksi Plagiarisme Pada Dokumen Tugas Akhir

Final Project Report at a university has the potential for plagiarism. To detect possible plagiarism, String Similarity can be used. Text preprocessing is needed to process words which can make String Similarity results inaccurate. The value of the distribution of the results of the similarity that is getting higher shows the level of accuracy is also getting higher. Reports that contain many words can make it difficult to find plagiarism recommendations. In this study, we try to divide the report into each chapter to provide more detailed recommendation material. By using text preprocessing and comparison methods in the same chapter, can determine the characteristics of each chapter. The discovery of the characteristics of each chapter can be used as plagiarism recommendation material in more detail than a full text report. The experiment was a comparison of the results of cosine similarity between the same chapters and full text, then combined with preprocessing stopword removal and stemming. The experimental results show that the use of preprocessing stopword removal and stemming can produce the highest distribution value and the similarity ratio in each chapter can show its characteristics. Words that represent the characteristics of a chapter can potentially become a stopword.