Modeling of Curvilinear Steel Rod Structures Based on Minimal Surfaces

The article deals with shaping effective curvilinear steel rod roof structures using genetic algorithms by implementing them for the analysis of various case studies in order to find new and efficient structures with positive characteristics. The structures considered in this article are created on the basis of the Enneper surface and minimal surfaces stretched on four arcs. On the Enneper surface, a single layer grid is used, while on the other surfaces, two-layer ones. The Enneper form structure with four supports and the division into an even number of parts along the perimeter of the covered place proved to be the most efficient, and the research showed that small modifications of the initial base surface in order to adapt the structure to the roof function did not significantly affect its effectiveness. However, the analysis and comparison of single and double-shell rod structures based on minimal surfaces stretched on four arcs have shown that a single-shell structure is much more effective than a double one. The paper considers the theoretical aspects of shaping effective structures, taking their masses as the optimization criterion. The optimization helped to choose the best solutions due to structures’ shapes and topologies. However, the obtained, optimized results can find practical applications after conducting physical tests.

Investigating Presence of Ethnoracial Bias in Clinical Data using Machine Learning

An important target for machine learning research is obtaining unbiased results, which require addressing bias that might be present in the data as well as the methodology. This is of utmost importance in medical applications of machine learning, where trained models should be unbiased so as to result in systems that are widely applicable, reliable and fair. Since bias can sometimes be introduced through the data itself, in this paper we investigate the presence of ethnoracial bias in patients’ clinical data. We focus primarily on vital signs and demographic information and classify patient ethnoraces in subsets of two from the three ethnoracial groups (African Americans, Caucasians, and Hispanics). Our results show that ethnorace can be identified in two out of three patients, setting the initial base for further investigation of the complex issue of ehtnoracial bias.

Discussion-provocation as a method of improving the educational process

The article describes the methodology of conducting training sessions in the discussion-provocation form as one of the methods of improving speech and thinking skills while teaching Russian as a foreign language in the classroom at an advanced training level and proves its effectiveness in mastering communication skills. It is shown that conducting training sessions in the discussion-provocation form helps to develop speech production skills among foreign students, to unleash creativity and logical thinking, making them to pass and process the information of the suggested basic text through “I-position” the prism. It enriches foreign students with elements of personally marked evaluation, thereby realizing the cognitive, communicative and educational tasks of the learning process. The advantages of authentic texts as an initial base for the speech skills development are described, as far as they reflect the real needs and emotional students’ mood through their approach to the surrounding reality and the interests of a particular individual, orient his thoughts to a given attitude. Discussion-provocation, being a non-standard form of classes helps to form an abstract and scientific world view among foreign students.

The possible and the impossible in the diachronous oykonymy on the example of the Kyiv region

The example of the Kyiv region’s oykonyms illustrates the difficulties faced by the linguist in the study of the names of settlements. The problems that arise in the analysis of chronicle oykonyms are illustrated by the example of Pereyaslav. In formal terms, the oykonym Pereyaslavl’ is appropriate to be considered as a possessive of *-j(ь) on the first name Pereyaslav. The first component is motivated by the verb ‘to adopt’, the second is ‘a glory’, which is productive of composite names. Chronicle form ‘Russkiy Pereyaslavl’ gave rise to a version of the name transfer of Pereyaslavl’ from Bulgaria. The designation of Russkiy ‹ Rus performed a distinctive function with respect to other oykonyms, including the Bulgarian Preslav the Great. The coherence of the names of the new city with the Bulgarian Preslav does not prove the common origin of the oykonyms. For most archaic oykonyms, one can only speak of anthroponyms, without specifying a particular person. The settlement of Mutizhir, known from the chronicles, initially disappeared and was subsequently rebuilt and renamed: Motyzhir, Motyzhyn, Borisov and again Motyzhyn. The name Mutizhyr does not pass over the XII century, and the settlement of Motyzhyn is mentioned only at the end of the XV century. The chronicle anthroponym-composite Mutizhir could not be a motivator in the new conditions of the oykonyms formation. The name Motyzhyn has changed so much in comparison with the chronicle of primary sources that it became perceived as an independent possessive formation. Oykonimikon of XVII century allows one to define an etimon-anthroponym, often without specifying its carrier. For example, the oykonym Karapyszi is a specific Slavic plural form from the nickname Karapysz which is a derivative formation with dialectic implementation of the root morpheme, the initial base *tort-. Only certain names attract the written information about its owner and founder. It is correctly to include Dytyatky in the Kyiv region to such oykonyms. Keywords: oykonym, oykonym in chronicles, word-forming model, anthroponim, appellative, etymology.

ON THE HISTORY OF THE FORMATION OF ISTANBUL ICONOGRAPHY IN THE PAINTING OF AZERBAIJAN

In the visual arts of Azerbaijan, the formation of the iconography of Istanbul is a multi-level and stage process. Its relevance is due to a number of factors of both the socio-ethnocultural aspect, historicism of relations, and creative searches of a personal nature. The purpose of the study of this article is to identify the context and the main priorities of the formation of the pictorial signature of Istanbul in Russian painting at certain stages of its development. The choice of the iconographic method as the main one made it possible to most clearly trace the specific semantics of the city, and also led to an appeal to the iconology of plots and genres associated with the image of Istanbul. The formation of canonical schemes took place against a complex background of a complex of historical mutual influences of related states, which necessitated the use of the diachronic method as one of the main tools. As a result, a rather capacious empirical base was analyzed, which included works of Azerbaijani painting from successive historical eras. Along with them, the initial base was considered, a series of interviews with the authors of the work was conducted. A generalization of the study was the conclusion that the image of Azerbaijani artistic creative consciousness was gradually formed, starting from the Middle Ages, within the framework of canonical art and against the background of constant close historical contact, which also led to periods of recession (Soviet period) in the development of themes. Stable positions during the new time are traditions of European romanticism, and in particular, Orientalism, reflected in the monumental painting of Azerbaijan. The stylistic and genre diversity is rapidly gaining momentum with a period of independence within the framework of both classical and postmodernism.

SILVER DIRHAMS OF SAMANIDS AS A HISTORICAL SOURCE

The Samanid state has a special place in the history of monetary circulation in Central Asia, reflecting the political and economic situation of that period. The article draws attention to the importance of expanding the initial base when evaluating monetary circulation and properties in Movarounnahr in the VIII-X centuries. It highlights the prospects for using local data to determine the role and place of Central Asia in the international economy of the Middle Ages

River Flood Hazard Modeling: Forecasting Flood Hazard for Disaster Risk Reduction Planning

The objective of the study is to create a flood hazard model of Tarlac River and to calibrate the model based on data gathered from the Philippine Atmospheric Geophysical and Astronomical Services Administration. The study employed analytical method wherein the 1D flood modeling was utilized. GIS, DEM data, rainfall data, river analysis system, HEC-GeoRAS, hydrologic modeling system, and HEC-GeoHMS were utilized. The different flood models revealed that Tarlac River is not expected to be overtopped by flood water as regards the different extreme rainfall events considered in the present study. The RAS model simulation was based on the concept that there is no base flow observed within the river reach before the occurrence of any extreme rainfall event. Henceforth, there is still no 100 percent assurance that the river reach will not be overtopped with the occurrence of initial base flow in combination with the occurrence of higher extreme rainfall events. Further studies or investigations should be delved into such combination of events. Possible levee breach of the Tarlac River as well as the possible incorporation of flood mitigating interventions in future modeling scenarios can be likewise considered.

ARCH-COMP 2019 Category Report: Falsification

This report presents the results from the 2019 friendly competition in the ARCH workshop for the falsification of temporal logic specifications over Cyber-Physical Systems. We describe the organization of the competition and how it differs from previous years. We give background on the participating teams and tools and discuss the selected benchmarks and results. The benchmarks are available on the ARCH website1, as well as in the competition’s gitlab repository2. The main outcome of the 2019 competition is a common benchmark repository, and an initial base-line for falsification, with results from multiple tools, which will facilitate comparisons and tracking of the state-of-the-art in falsification in the future.

CONSTRUCTION OF A SUPERADOBE DOME

Superadobe Technology consists on filling long polypropylene sacks with a moist mixture of clay, sand, gravel and lime/cement; placing and compacting one on top of another forming concentric rings of decreasing radius and describing a double curvature monolith.From the 26th of August till the 6th of September of 2017, a group of 10 students at the “Domoterra” Institute of Earthbag construction, in the province of Teruel, autonomous community of Aragon, Spain, participated in the construction of what would become a Superadobe domed shelter of internal diameter 4m, roughly 3.5m high with the capacity to enclose 17.5m^2 of habitable surface, using approximately 250m of polypropylene sack and 20 m³ of earth.The structure advanced from an initial base cylinder of 0.5 m to the height of 2.1 m in 7 effective work days of 8 hours each day, and such an experience is taken into account together with existing literature, to describe the construction process of a Superadobe dome.