Macular edema after surgical treatment of rhegmatogenous retinal detachment – the possibilities of its prediction

The aim: to develop a mathematical model for predicting macular edema based on the informativeness of clinical and instrumental predictors of its occurrence.Materials and methods. To determine the risk factors for macular edema 64 patients (64 eyes) with macula-off rhegmatogenous retinal detachment complicated by proliferative vitreoretinopathy (grade Cp 1–2) were selected. A retrospective analysis of the surgical treatment results was carried out. The age of the patients ranged from 30 to 81 years (28 women and 36 men).Results. Using regression analysis, two signifi cant factors were identifi ed: the sum of 8 meridians of the visual fi eld before surgery (p = 0.015) and the number of detached quadrants (p = 0.021). Based on the identifi ed factors, a model was obtained for predicting the occurrence of macular edema in the postoperative period for the patients with rhegmatogenous retinal detachment. Conclusion. Based on the analysis of clinical and instrumental indicators in patients with rhegmatogenous retinal detachment, a mathematical model has been developed that allows predicting the occurrence of macular edema in the postoperative period.The application of the proposed prediction model makes it possible to determine the tactics of treatment (peeling of internal limiting membrane) and predict the appearance of macular edema at the preoperative stage

Método de cálculo de parâmetros racionais para dispositivos com eixo de rotação horizontal para disseminar fertilizantes minerais e sementes

The article proposes the modeling technique for the uniform distribution of particles by a throwing unit. The material is devoted to the substantiation of rational parameters and operating modes of vertical throwing units to distribute the particles of fertilizers and seeds.El artículo propone la técnica de modelado para la distribución uniforme de partículas por una unidad de lanzamiento. El material está dedicado a la fundamentación de parámetros racionales y modos de operación de unidades de lanzamiento vertical para distribuir las partículas de fertilizantes y semillas. O artigo propõe a técnica de modelagem para a distribuição uniforme de partículas por uma unidade de arremesso. O material é dedicado à comprovação de parâmetros racionais e modos de operação de unidades de arremesso vertical para distribuir as partículas de fertilizantes e sementes

Method for evaluation of oil displacement coefficient based on conventional core analysis

The article is devoted to the problem of evaluation of oil displacement coefficient. Determination of oil displacement coefficient is essential stage for estimation of recoverable reserves, feasibility study of oil recovery factor and control of field development. Complexity of its laboratory determination is caused by labor intensity and duration of a process. When the number of cores is not enough for flow experiments or absent oil recovery factor is evaluated either similarly to neighbor fields or by analytical dependencies that are important to obtain. During the generalization and analysis of a significant amount of experimental data the authors developed a method for estimation of oil displacement coefficient without its laboratory determination. A proposed method is based on use of data from previous studies to built statistical models for estimation of displacement coefficient using linear step-by-step regression and discriminant analysis. In order to implement the method along with oil viscosity, knowledge of reservoir parameters such as porosity, permeability, irreducible water saturation and bulk density of a rock, determined by conventional core studies, is required. The main stages of implementation of the method for Visean clastic deposits of the Bashkir arch and Solikamsk depression of the Perm Region are presented. Results of implementation of the method for Bashkir carbonate deposits of the indicated tectonic elements are presented as well. Analysis of initial data allow establishing that there are classes of values for which regression equations are statistically justified. According to the equations model and experimental values of the displacement coefficients are very close to each other. It was concluded based on parameters of the equations that there is abnormal influence of initial oil saturation on the displacement coefficient. It is shown that for reservoirs of low flow characteristics a displacement coefficient is determined by their capacitive properties

ПРИМЕНЕНИЕ БИОКОМПОЗИТА «ЛИТАР» ДЛЯ ЛИКВИДАЦИИ ОСТАТОЧНЫХ ПОЛОСТЕЙ ПЕЧЕНИ В УСЛОВИЯХ ЭКСПЕРИМЕНТА

Experimental-histological justification for the use of composite material «LitAr» in combination with oxytocin has done to replace residual cavities in liver for optimal terms of regeneration. The data on the optimization of epithelial connective tissue relations that in the proliferative phase creates preconditions for elimination of defect regenerate tissue-specific parenchymatous elements of the liver. In series with the addition of oxytocin residual cavity liver is filled organotypic tissue elements of the regenerate more quickly.Проведено экспериментально-гистологическое обоснование применения композитного материала «ЛитАр» в сочетании с окситоцином для замещения остаточных полостей печени и для обеспечения оптимальных условий регенерации. Получены данные об оптимизации эпителиально-соединительнотканных взаимоотношений, что в пролиферативную фазу создает предпосылки для замещения дефекта тканеспецифическим регенератом паренхиматозных элементов печени. В сериях с добавлением окситоцина остаточная полость печени заполняется тканевыми элементами органотипического регенерата в более короткие сроки.

THE TRAINING OF FUTURE PRIMARY-SCHOOL TEACHERS FOR APPLICATION OF INFORMATION COMMUNICATION TECHNOLOGIES AT THE LANGUAGE LESSONS

The necessity of training of the future primary-school teachers for application of information communication technologies (ICT) in their professional activity is proven in the article. The author considers the essence of the teacher’s language didactic competence, reveals constituent components of the latter, and proves the urgency of the problem of introducing the future primary school teachers to the basics of electronic language didactics as a branch of education studies

THE TRAINING OF FUTURE PRIMARY-SCHOOL TEACHERS FOR APPLICATION OF INFORMATION COMMUNICATION TECHNOLOGIES AT THE LANGUAGE LESSONS

The necessity of training of the future primary-school teachers for application of information communication technologies (ICT) in their professional activity is proven in the article. The author considers the essence of the teacher’s language didactic competence, reveals constituent components of the latter, and proves the urgency of the problem of introducing the future primary school teachers to the basics of electronic language didactics as a branch of education studies

Segmentation of the image received from the on-borne optical-electronic observation system, swarm method

Викладена сутність простішого ройового методу сегментування оптико-електронного зображення, що отримано з бортової системи спостереження. Проведено експериментальні дослідження щодо застосування ройового методу до сегментування зображення, що отримано з бортової системи оптикоелектронного спостереження. Проведена візуальна оцінка якості сегментованого зображення та виділені можливі об’єкти інтересу для подальшого дешифрування оптико-електронного зображення.Изложена сущность простейшего роевого метода сегментации оптико-электронного изображения, полученного с бортовой системы наблюдения. Проведены экспериментальные исследования по применению роевого метода к сегментации изображения, полеченного с бортовой системы оптико-электронного наблюдения, Проведена визуальная оценка качества сегментированного изображения и выделены возможные объекты интереса для последующего дешифрирования оптико-электронного изображения.The essence of the simplest swarm method of segmentation of the optoelectronic image obtained from the on-board observation system is expounded. Experimental studies on the application of the swarm method to the segmentation of an image from an onboard optical-electronic surveillance system were carried out. A visual assessment of the quality of the segmented image was made and possible objects of interest were identified for subsequent de-encryption of the optoelectronic image